ОПТИЧЕСКИ ИЗМЕНЯЕМЫЙ ЭЛЕМЕНТ И ЕГО ПРИМЕНЕНИЕ

Изобретение относится к оптически изменяемому элементу и его применению в качестве защитного элемента для защиты от подделки ценных документов или предметов. Оптически изменяемый элемент по меньшей мере на участках поверхности содержит граничную плоскость, образующую оптически действующую структуру, выступающую пространственно вперед и/или назад относительно мысленной опорной поверхности. Граничная поверхность имеет поверхность свободной формы, представляющуюся наблюдателю трехмерной. Поверхность свободной формы образована линзоподобным, т.е. кажущимся пространственно выпуклым или сдвинутым назад, участком граничной поверхности с образованием эффекта увеличения, уменьшения или искажения. Поверхность свободной формы выполнена со структурой дифракционной решетки, линии которой, по существу, следуют очертаниям поверхности свободной формы. Оптически изменяемый элемент как часть декоративной слоистой структуры переводной или ламинированной пленки за счет получения трехмерных оптических эффектов ...

ПОВЕРХНОСТЬ ЛИНЗЫ С КОМБИНИРОВАННЫМИ ДИФРАКЦИОННЫМИ, ТОРИЧЕСКИМИ И АСФЕРИЧЕСКИМИ КОМПОНЕНТАМИ

Группа изобретений относится к медицинской технике. Интраокулярная линза содержит оптический элемент, содержащий переднюю поверхность, заднюю поверхность и множество дифракционных зон, расположенных на одной из упомянутых поверхностей. Поверхность, содержащая дифракционные зоны, имеет профиль, характеризуемый сочетанием асферического и торического компонентов. Применение данной группы изобретений обеспечит коррекцию асферических и астигматических аббераций. 2 н. и 17 з.п. ф-лы, 4 ил.

МУЛЬТИФОКАЛЬНАЯ ЛИНЗА

Изобретение относится к медицине. Мультифокальная линза содержит рефракционную фокальную точку и дифракционную структуру. Дифракционная структура в радиальном направлении (r) линзы, нанесенная на квадрат радиуса (r2), имеет периодический профиль. Периодический профиль имеет четыре смежных участка, которые в местах их соединения не дифференцируемы. При этом первый участок монотонно убывает, а три прочих участка монотонно возрастают или первый участок монотонно возрастает, а три прочих участка монотонно убывают. Причем прочий участок, не граничащий с указанным первым участком, имеет больший наклон, чем другие два прочих участка. Два прочих участка, граничащие с первым участком, нанесенные на квадрат радиуса (r2), имеют наклон от 1 мкм/мм2 до 10 мкм/мм2, и период (р) профиля, нанесенный на квадрат радиуса (r2), составляет от 0,5 мм2 до 1 мм2, а глубина (Т) профиля - от 2 мкм до 10 мкм. Применение изобретения позволит расширить арсенал технических средств, а именно мультифокальных линз. 5 з.п ...

Однослойная пленка для проецирования изображений

Изобретение относится к оптическим материалам, способным создавать ряд визуальных эффектов. Однослойная система проецирования изображений для проецирования одного или более изображений включает структуру отражающих дугообразных элементов, имеющих верхнюю дугообразную поверхность, нижнюю поверхность и ограниченную верхней дугообразной и нижней поверхностями дугообразную зону, а также отражающий узор из рельефных микроструктур изображений, расположенных по крайней мере на некоторых из верхних дугообразных поверхностей дугообразных элементов или внутри них. Структура отражающих дугообразных элементов и отражающий узор из рельефных микроструктур изображений находятся в одном слое и взаимодействуют для проецирования одного или более изображений, где в случае верхней дугообразной поверхности с выпуклым изгибом поверхности рельефные микроструктуры изображений простираются вниз от этой поверхности и оканчиваются в дугообразной зоне, а в случае верхней дугообразной поверхности с вогнутым изгибом ...

ОПТИЧЕСКИ ИЗМЕНЯЕМЫЙ ЭЛЕМЕНТ И ЕГО ПРИМЕНЕНИЕ

... 1. Оптически изменяемый элемент, который, по меньшей мере, на участках поверхности содержит граничную плоскость, образующую оптически действующую структуру, выступающую пространственно вперед и/или назад относительно (мысленной) опорной поверхности, причем оптически действующая структура содержит, по меньшей мере, одну поверхность свободной формы, представляющуюся наблюдателю трехмерной, в форме буквенно-цифрового знака, геометрической фигуры или иного объекта, отличающийся тем, что поверхность свободной формы образована выполненным линзоподобным участком граничной поверхности (3), образующим элемент (11, 12, 13, 14, 15) свободной формы с эффектом увеличения, уменьшения или искажения. 2. Оптически изменяемый элемент по п.1, отличающийся тем, что граничная поверхность (3) встроена между двумя слоями (1, 2) слоистой структуры. 3. Оптически изменяемый элемент по п.1 или 2, отличающийся тем, что, по меньшей мере, один из слоев (1, 2), заключающих между собой граничную поверхность (3), окрашен ...

OPTISCHES GERAET

Vorrichtung zur augennahen Informationsdarstellung

Die Erfindung betrifft eine Vorrichtung zum augennahen Darstellen von Informationen mit einer am Kopf (10) eines Benutzers tragbaren Halterung (12) und einer an der Halterung (12) angeordneten und in Gebrauch in einem peripheren Gesichtsfeldbereich eines ersten Auges (14) des Benutzers positionierten monokularen Anzeigeeinheit (16). Gemäß einem ersten Erfindungsaspekt wird vorgeschlagen, dass an der Halterung (12) eine mit Umgebungslicht beaufschlagbare Lichtsammeleinheit (18, 20) angeordnet ist, und dass die Lichtsammeleinheit (18, 20) mit der Anzeigeeinheit (16) zu deren Beleuchtung gekoppelt ist.

FRESNELLINSE MIT STUFEN AUF BEIDEN SEITEN FUER OVERHEADPROJEKTION

Homogenisierender Lichtleitkörper für Solarkonzentratoren

Darstellungselement für Lichtfleckenbild

Die Erfindung betrifft ein Darstellungselement (20) mit einem Substrat (22) mit einem Flächenbereich (24), in dem eine Mehrzahl gegen den Flächenbereich geneigter optischer Elemente (16) angeordnet ist. Das Darstellungselement (20) ist ausgelegt und bestimmt, bei Beleuchtung mit einer Lichtquelle (30) ein Lichtfleckenbild aus einer Mehrzahl von Lichtflecken (32) zu erzeugen, die für einen Betrachter (40) oberhalb oder unterhalb des Flächenbereichs (24) schwebend erscheinen, wobei sie mit einer kontinuierlichen Änderung ihrer scheinbaren Schwebehöhe einer vorgegebenen, gegenüber dem Flächenbereich vor- und/oder zurückspringenden Oberflächentopographie (50) folgen. Jedem Lichtfleck (32) des Lichtfleckenbilds ist eine Mehrzahl von optischen Elementen (26) zugeordnet, die refraktive und/oder reflektive optische Elemente sind, die zusammen eine Fresnelstruktur (28) bilden, wobei die optischen Elemente (26) einer Fresnelstruktur (28) bei Beleuchtung des Darstellungselements zusammenwirken um ...

Optische Leuchtenabdeckung mit Fresnel-Prismen, deren Verwendung sowie ein Verfahren zu ihrer Herstellung

Optical collimation system has Fresnel lens comprising dead edge regions whose inclination with respect to optical axis is depended on inclination of associated dead edge regions of reflector

The system (16) has reflector (10) whose boundary face comprises several dead edge regions (24a-24d) to which several dead edge regions (18a-18d) of a Fresnel lens (14) are associated. A light source is arranged at focal point of Fresnel lens. The reflector is arranged to reflect light emitted from light source. The light reflected by reflector is guidable on dead edge regions of Fresnel lens by dead edge regions of reflector. The inclination of dead edge regions of lens with respect to an optical axis (20) is depended on inclination of associated dead edge regions of reflector.

SONNENLICHTSAMMELVORRICHTUNG

Entfernungsmesssystem

Entfernungsmesssystem mit einem Sender (10) zur Aussendung eines modulierten Lichtsignals (Sp1), mit einem Empfänger (20), der ein Lichtlaufzeitsensor (22) mit wenigstens einem Lichtlaufzeitpixel (23) aufweist, und der zum Empfang und Demodulation eines empfangenen modulierten Lichtsignals (Sp2) ausgebildet ist, mit einem Modulator (30), der ein Modulationssignal für den Sender (10) und den Empfänger (20) zur Verfügung stellt, und einem Messtarget (45) zur Rückstrahlung des vom Sender (10) ausgesendeten Lichtsignals (Sp1) an den Empfänger (20), wobei das Messtarget (45) eine mittlere Reflektivität von wenigsten 80 % und mehr aufweist, und Homogenität, Robustheit für Verkippung und Abstrahlcharakteristik und das Linsensystem für das Entfernungsmesssystem optimiert sind.

Optoelektronischer Sensor

Optoelektronischer Sensor mit einem Lichtsender 1 zum Aussenden eines Lichtsignals durch einen Kollimator 2 in einen Objektbereich 3 auf einer ersten optischen Achse 4, mit einem Empfänger 5 und einer Empfängerlinse 6 zum Empfang des von einem Objekt reflektierten Lichtsignals auf einer zweiten optischen Achse 7, wobei die Empfängerlinse 6 eine Hauptlinse 8 zur Abbildung des Objektbereichs 3 und eine Zusatzlinse 9 zur Erfassung des Nahbereichs enthält, wobei die Zusatzlinse 9 eine zweidimensional parametrierbare Freiformfläche aufweist, die das Licht umso stärker in Richtung der zweiten optischen Achse 7 lenkt, je näher sich ein reflektierendes Objekt am Sensor befindet, wobei die Zusatzlinse 9 eine Strahlen aus dem Nahbereich brechende bikonische Fläche 10 mit zwei unterschiedlichen Brennweiten f1 und f2, sowie eine Strahlen aus dem Nahbereich reflektierende Fläche 11 aufweist.

Verfahren zur Realisierung eines ebenen, uniformen Bildes einer Laserdioden-Anordnung.

Online-Datenvalidierer eines Druckers

Ein Online-Datenvalidierer, der ein digitales Abbildungssystem ist, das an der Vorderseite eines Druckers integriert ist, wobei ein Ausgang des Druckers an derselben Seite nahe dem Online-Datenvalidierer angeordnet ist, wobei der Drucker verwendet wird, um Bilder eines Etiketts auf ein daraus austretendes Medium zu drucken, wobei der Online-Datenvalidierer umfasst:ein Gehäuse, das ein Fenster in einem nächstliegenden Abstand von dem Ausgang umfasst;eine Kontrollvorrichtung, die in das Gehäuse aufgenommen ist, wobei die Kontrollvorrichtung das Etikett empfängt undvalidiert und mit einer Host-Kontrollvorrichtung des Druckers kommuniziert;eine Kamera, die in das Gehäuse aufgenommen ist und umfasst:ein Lichtquellenmodul das neben dem Fenster angeordnet ist und eine interne Lichtquelle zum Beleuchten des Mediums, das den Ausgang verlässt, bietet; undein Kameramodul das einen Kamerasensor und eine optische Linse zur Aufnahme 2D-digitaler Bilder der Etiketten umfasst, wobei die optische Linse ...

Image screen e.g. for telecommunications and information technology equipment, uses lens for each image screen unit formed from display zone and edge zone

An image screen has its display formed out of several small image screen units (1,1',1'') which are arranged during operation of the image screen, adjacent to one another or in the form of a matrix in a common plane (EB). Lenses (4,4',4'') form a plane (EL) extending parallel to the plane (EL) of the image screen units, and which is arranged to the plane of the image screen units (1,1',1''), such that the display area (2,2',2'') lies fully within, and its edge zone (3,3',3'') lies fully outside the focal cone (5,5',5''), covering the focal point (F) of its associated lens (4,4',4''). In a virtual representation plane (EV) an image of the display zone (2) of the respective image screen unit, arises and which corresponds in dimensions to the edge lengths of the lens (4,4',4'') of the plane (EL).

Circular Fresnel lens

Published without abstract.

FORMGEBUNGSOPTIK FÜR LEUCHTDIODENANORDNUNG

Directional optical system for one or more light-sources, uses optically active components fabricated from linear structured optical plates

An optical system for directing light rays from one or several light sources, has the optically active components fabricated from linear structured optical plates i.e. having one or several parallel adjacent similar linear structures e.g. Fresnel lenses.

Improvements in or relating to optical lenses

... 666,222. Lenses; projection screens. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 30, 1949 [July 31, 1948], No. 20417/48. Class 97 (i). Rectilinear prismatic elements are formed on both sides of a light-transmitting sheet, the elements on one side being at right-angles to those on the other, the angles of the elements increasing towards the perimeter of the sheet so as to form a Fresnel lens. The lens may be associated with a projection screen comprising a light-transmitting sheet having parallel cylindrical lenses on one surface and other parallel cylindrical lenses on the other surface at right angles to those on the first. Fig. 1 shows a cross-section, in one direction, of a combination of lens and screen, Fig. 2 being a section in a perpendicular direction. The screen 1 has semi-cylindrical elements 2 on one face and arcuate cylindrical elements 3 on the other face which may be silvered if a reflecting screen is required. The lens 6 has prismatic elements 7, on one face, of the same pitch ...

Free form fresnel lens

Improved fresnel lens

Process for producing a doubly convex lens screen

Glass composition consisting of oxides which at low temperatures form volatile fluorides by reaction with fluorine

A glass composition consists of oxides which at low temperatures form volatile fluorides, where the glass consists of (in % by mole): SiO Þ 40-70 GeO Þ 0-30 B Þ O35-20 P Þ O Å 5-20 WO ý 0-10 As Þ O ý 0-10 Yb Þ O ý 0-5 Lu Þ O ý 0-5 The composition may be used in a microstructuring method such as reactive ion etching (RIE) to form microarrays, fresnel lenses, microwafers and microlens wafers.

PROJECTION TYPE LIQUID-CRYSTAL VIDEO DISPLAY DEVICE USING A FRESNEL LENS

Improvements in or relating to light projectors

... 584,666. Vehicle lamps; lenses. SOC. POUR LA FABRICATION DES PROJECTEURS ELECTRIQUES MARCHAL. Aug. 12, 1939, No. 23315. Convention date, May 11. [Classes 75 (ii) and 75 (iv)] In a light projector for automobiles comprising a reflector and stepped refractor, the luminous beam passing through the central zone of the refractor has such an angle of divergence as to illuminate the whole of the required field and the beams passing through the peripheral zones illuminate only central zones within the field where a higher illumination is required. Fig. 10 shows a vehicle headlamp comprising an ellipsoidal reflector 6 haying a light source 7 arranged at its focus F and fitted with a refractor formed in several steps f1, f2, f3, f4, f5, all having their focus at the other focus F' of the reflector but of differing focal lengths, the beams passing through the various steps illuminating areas G1 H1 I1 J1, .... G5 H5 I5 J5 respectively on a distant screen. In another construction the reflector is of ...

Lens having densely-distributed convex facets on its entrance and exit surfaces

A vision altering screen for a wall-mounted container

A screen 9 for a wall mountable container 7, said container in use having a wall-facing back spaced from a screen, so as to hold contents, is characterized in that the screen optically alters a user's view of the contents. The screen may optionally include a lens made of a transparent material having a form that provides optical refraction (for example a plastic Fresnel lens) for magnification and focusing of the contents of the container. Further embodiments of the screen may include a detachable lens or the screen may be displaceably mounted upon the container in order to allow a user access to the contents of the container. The container may be mounted to a wall in use by using suction cups 4,5.

Lens having densely-distributed convex facets on its entrance and exit surfaces

An LED integrated light source lens has a light entering section 1 in the shape of a blind recess, a light emitting section 2 at the front face of the lens, and an optical lens 3 positioned between the light entering section and the light emitting section. The optical lens has a substantially solid generally conical or frustoconical body, whose external surface incorporates a network of densely distributed convex facets that cause the LED integrated light source lens to emit multi-point light beams. The base 18 of the blind recess is provided with a refractive surface and may have convex facets. The light emitting section comprises a generally concave cup shaped recess. Light is emitted from the integrated light source lens with a beam angle less than 180 degrees.

Synthetic diamond optical elements

Improvements in method and means for focussing lenses

... 219,406. Webster, A. W., and Kapella, Ltd. April 27, 1023. Finders.-Apparatus for focusing simultaneously two or more lenses of different focal length by mechanism involving the use of screw threads of different pitch comprises an operating - member rotatably mounted on a support, a carriage for each lens hava peripheral surface engaging the operating-member, and screw-threads of different pitch on these surfaces, engaging screw-threads on the operating-member, for displacing the lenses simultaneously when the operating-member is rotated. In the form shown, lenses B, C are mounted in carriages D, E, threaded into a rotary sleeve G, which is in turn threaded into a fixed flange A, and carries an operating-handle. A feather F prevents rotation of the carriages D, E with respect to the flange A. The pitch and hand of the various screw-threads are chosen to produce differential axial movement of the lenses according to their focal lengths. Multiple screwthreads may be employed if rapid axial ...

CORRECTION LENSES UTILIZED TO FORM FLUORESCENT SCREENS OF COLOUR PICTURE TUBES

... 1452137 Colour television tubes HITACHI Ltd 4 Dec 1973 [4 Dec 1972] 56222/73 Heading HID A correction lens for forming a colour tube screen is divided into a plurality of lens segments separated from one another by step-shaped border walls 6, either all, or all but a major one of the segments not being completely bounded by the step-shaped border walls, the peripheral line of the lens being correspondingly step-shaped, the segments each having a curved or plain surface so that the refractive characteristic produces the required correspondence between light and electron paths. The lens reduces shadowing due to the step-shaped border lines. The VII-VII cross-section of Fig.6, (Fig. 8 not shown), indicates a stepless border line 7 across the major segment. Aberrations may be corrected at the sides or corners only, Figs.10 and 16 respectively (not shown). The remaining Figures illustrate further variations.

Wide aperture optical communications

LENSES

... 1513314 Dual focus objectives RANK ORGANISATION Ltd 13 Jan 1977 [16 Feb 1976] 06043/76 Heading G2J As described, a catadiaoptric objective comprises the following stationary components, a front annular lens L I ; a first annular concave reflector M I ; a first central reflector M II ; a lens arrangement L III , L IV , L V ; a second annular concave reflector M III ; a second annular central reflector M IV ; a lens component L VI ; shutters S1-S3: and an axially moveable annular lens L II . Long focal length (bottom of Fig.). The moveable annular lens L II is adjacent front lens L I and the pair is substantially afocal. Light is reflected from mirrors M I M II to the lens combination L III - L VI and thence via lens L VI to the focal plane. Short focal length (top of Fig.). The moveable lens L II is adjacent mirror M I . Light is converged by front lens to miss mirror M I but to pass through an annular area of lens combination L IV L V . Subsequently light is focused at the focal plane by ...

Fresnel lens

The invention provides a Fresnel lens (47) comprised of a suitably shaped transparent plastic layer 43 bonded to a transparent substrate (42). In another embodiment (Figure 3 not shown) the substrate is bonded on each side to one of the plastic layers. This combines the forming capacity of a plastic with a substrate which can be low cost or has other suitable characteristics. The invention is particularly applicable to a solar energy concentrator (40) using the lens (47) in conjunction with an energy receiver (44). The substrate may be of a glass e.g. a tempered, low-iron oxide glass and the plastic may be a cured epoxy resin. ...

Optical Sensors in Semiconductor Devices

An optical sensor in an integrated Complementary Metal Oxide Semiconductor (CMOS) device, comprising: a sensor element 6 with an optical active region; a CMOS backend stack 8 comprising one or more layers; and an optical lens 20 formed in a layer of said one or more layers and arranged to direct light incident upon it towards the sensor element. Methods of manufacturing comprise forming the optical lens in a layer of the back-end stack using a CMOS backend process (such as back-end-of-line BEOL). Preferably the lens has a binary structure with a Fresnel zone plate design, and comprises a plurality of substantially concentric rings (40, figure 6). The lens may be formed in a dielectric layer (i.e. nitride passivation layer or oxide layer) or a metallization layer. By forming the lens in a layer of the backend stack during the CMOS process, there is no longer the requirement for additional layers to be deposited, instead the lens can be directly integrated in the standard CMOS backend stack ...

Linear fresnel light condensation device with highmultiplying power

Linear fresnel light condensation device with highmultiplying power

Linear fresnel light condensation device with highmultiplying power

DESIGN PROCEDURE FOR A DEVICE FOR THE CONCENTRATION OR COLLIMATION OF RADIATION ENERGY

PROJEKTIONSOBJEKTIV

LIGHTING LENS FOR AN OPTICAL CODE READER

OPTO-ELECTRONIC FOCUSING DETECTION SYSTEM

LAMINATE SHEET AND INDICATOR SCREEN

Beleuchtungseinrichtung

The invention relates to an illumination device (10) for a microscope or for an optical 3D surface measuring apparatus (100), more particularly according to the principle of focus variation. The illumination device comprises light sources (20) in the form of LEDs arranged in a planar fashion, and an illumination optical unit (30, 40) for imaging the illumination spectrum onto an object (200) to be examined. The illumination optical unit comprises an arrangement of a plurality of converging lenses (30) and at least one Fresnel lens (40), wherein the light beams emitted by the LEDs (21) firstly impinge on the converging lenses (30) and then impinge in a parallel-directed manner on the Fresnel lens (40). The Fresnel lens (40) is oriented in reflective arrangement such that lens vertices (42) of a prism structure (41) are arranged at a light exit side (44) of the Fresnel lens (40), facing away from the converging lenses (30). The converging lenses (30) are formed by annulus segments (35), wherein ...

CREDIT CARD WITH VERGRÖSSERUNGSLINSE

DOUBLEREFLECTING LENS

PROCEDURE FOR THE EXTRUDING OF PLASTIC BOARDS AND FROM THIS MANUFACTURE FRESNEL LENSES

Signal light assembly

A signal light assembly is provided that comprises a multi-position Fresnel lens having a circumference, a first side and a second side. The signal light assembly further comprises a main housing configured to attach to the multi-position Fresnel lens. The multi-position Fresnel lens includes a first plurality of pads and a second plurality of pads on the first side of the multi-position Fresnel lens such that the first plurality of pads and the second plurality of pads are different and alternatively disposed. The first plurality of pads corresponds to a first range operation related to a first focal length. The second plurality of pads corresponds to a second range operation related to a second focal length. The multi-position Fresnel lens is disposed in a first position corresponding to the first range operation or in a second position corresponding to the second range operation based on the use of either the first plurality of pads or the second plurality of pads for assembly between ...

Structure screens for controlled spreading of light

Diffractive lenses for vision correction

Diffractive lenses for vision correction

Abstract Diffractive lenses for vision correction are provided on a lens body having a first diffractive structure for splitting light into two or more diffractive orders to different focal distances or ranges, and a second diffractive structure, referred to as a multiorder diffractive (MOD) structure, for 5 diffracting light at different wavelengths into a plurality of different diffractive orders to a common focal distance or range. In a bifocal application, the first and second diffractive structures in combination define the base power for distance vision correction and add power for near vision correction of the lens. The first and second diffractive structures may be combined on the same surface or located on different surfaces of the lens. The first diffractive structure may have blazed 10 (i.e., sawtooth), sinusoidal, sinusoidal harmonic, square wave, or other shape profile. A sinusoidal harmonic diffractive structure is particularly useful in applications where smooth rather than ...

Discrete condenser lens

LENTICULAR LENS SHEET AND PRODUCTION METHOD THEREFOR

An optical lens and a miner's helmet lamp

... -11 Abstract The embodiments of the present invention provide a kind of optical lens and a kind of miner's helmet lamp. A kind of optical lens, comprising a reflective surface and a light exit surface; wherein, in a circle with the central position of the said reflective surface as its center, at least a light distribution camber and a reflective camber are set up along the radius direction of the said reflective surface; in a circle with the central position of the said light exit surface as its center, at least a Fresnel annular surface and a surface are set up along the radius direction of the said light exit surface; the said light distribution camber is used for refracting the light incident on the said reflective surface to the said Fresnel annular surface and the said surface; the said reflective camber is used for reflecting the light incident on the said reflective camber to the said surface in collimation; the said Fresnel annular surface is used for reflecting the light incident ...

Multiple state electroactive ophthalmic device

A variable focus ophthalmic device is described. The device comprises a front curve optical portion of the variable focus ophthalmic device comprising a front curve top optical surface and a front curve bottom optical surface and a back curve optical portion of the variable focus ophthalmic device comprising a back curve top optical surface and a back curve bottom optical surface. A cavity is formed by the front curve bottom optical surface of the front curve optical portion of the variable ophthalmic device and the back curve top optical surface of the back curve portion of the variable focus ophthalmic device. A fluid with a first index of refraction and a dielectric film is in contact with at least a portion of the fluid with a first index of refraction and overlaying an electrode capable of establishing an electric field. A gas with a second index of refraction is provided, wherein the first index of refraction and the second index of refraction are different. One or more reservoir ...

Linear Fresnel light concentrating device with high multiplying power

A linear Fresnel light condensation device (1, 101, 102, 103) with a high multiplying power comprises a reflector field (2), and a receiving device (3). The reflector field (2) comprises a plurality of arrays of one-dimensional linear convergence reflector strips (4); the linear receiving device (3) is arranged parallel to the reflector strip (4), and is arranged with a secondary optical light condensation device inside, the height value of the receiving device (3) exceeds half of the width value of the field, so as to obtain a high primary convergence light condensation multiplying power and a high secondary convergence light condensation multiplying power, thereby implementing a high total convergence light condensation multiplying power. High multiplying power light condensation in low cost can be achieved, and at the same time the severe problem such as low light condensation efficiency caused by the extinction, the tolerance rate and the shielding rate and the problem of inconvenience ...

A LENS FOR FLOODLIGHTS

Lens having densely-distributed convex facets on its entrance and exit surfaces

Optical lens (3) for a LED comprising a lens body (10) having: - a light-entering section (1), where light from the LED enters the lens (3), having a cross-sectional dimension (D2) and recessed to accommodate a LED; - a light-emitting front face (2); - a frusto-conical shape (4), extending along a central axis between the light-entering section (1) and the light-emitting front face (2), the outer surface of which incorporating a plurality of densely-distributed convex facets (24); - a height (H) along said central axis; - a cross-sectional width (Dl) at the level of the light-emitting front face (2). This optical lens enhances light utilisation efficiency, avoids creating spots with chromatic aberration hence greatly improves colour rendering.

LOW-PROFILE OPTICAL WARNING SYSTEM

Abstract of the Disclosure An optical warning system comprises a light head that includes a light source emitting light rays from a light-emitting area. The light rays propagate through an optical diffuser to provide a visual warning signal to an observer remotely located from the optical warning system, A Fresnel optic array positioned between the optical diffuser and the light-emitting area is spaced apart from and spatially aligned with the light-emitting area to receive the light rays emitted from the light-emitting area and form a collimated light beam. The Fresnel optic array is fabricated so that it exhibits increased optical transmission efficiency by reducing light lost to scattering in forming the collimated light beam. -21 CNo 5: / ...

Beacon light optic, beacon light

A beacon light optic comprising a plurality of light emitting elements and a light transmitting element arranged above it. The light received in the light transmitting element is divided in at least two beams, each following a different path through their respective segment and being directed to the exit surface of the respective segment. The beacon light optic thus emits light in an angular distribution in a horizontal plane and with a small vertical beam spread.

Enclosure for concentrator photovoltaic device and concentrator photovoltaic device using same

An enclosure for a concentrated solar power generation device according to the disclosure of the present invention is provided with a side wall which is formed of a resin and has an upper end, a lower end, an inner surface, and an outer surface, the side wall having a vent hole that passes through the inner surface and the outer surface of the side wall, and the vent hole being inclined in a direction leading towards the lower end from the upper end of the side wall, going from the inner surface to the outer surface of the side wall. According to the present disclosure, the power generation efficiency of a solar power generation module can be further increased, and performance degradation can be suppressed, such degradation being associated with infiltration into a casing interior by dust, water drops, foreign matter, or other substances that are to be prevented from contaminating the casing interior.

SOLAR ENERGY SYSTEM WITH CONCENTRATING LENS

Rear projection screen using birefringent optical film for asymmetric light scattering

OBJECTIVE REFRACTOR FOR THE EYE

DUAL GROOVED FRESNEL LENS FOR OVERHEAD PROJECTION

OBJECTIVE REFRACTOR FOR THE EYE

OBJECTIVE REFRACTOR FOR THE EYE An objective refractor for the eye is disclosed in which knife-edge optics are utilized. The knife-edge optics cause characteristic illumination of the retina so that components of sphere and astigmatism can be identified. Provision for remote reading of the characteristic images is provided with the result that two orthogonally disposed knife-edge images can identify the sphere, cylinder and axis required for prescriptive patterns giving the direction and magnitude of required prescriptive change. A system of at least two orthogonally disposed, (and preferably four), knife edges with weighted lighting is disclosed for detection. Utilization of the knife-edge images is made possible by the detection of the low light level images at a detector having low noise level. A photo-sensitive element divided into a plurality of photo-discrete segments has light from the images proportionally dispersed over its surface. Such dispersion occurs through a matrix of wedge-shaped ...

SMOOTHLY GRANULATED OPTICAL SURFACE AND METHOD FOR MAKING SAME

CORRECTING LENS HAVING TWO EFFECTIVE SURFACES

META-LENSES FOR SUB-WAVELENGTH RESOLUTION IMAGING

A meta-lens having a phase profile includes a substrate and a plurality of nanostructures disposed on the substrate. Each individual nanostructure of the nanostructures imparts a light phase shift that varies depending on a location of the individual nanostructure on the substrate. The light phase shifts of the nanostructures define the phase profile of the meta-lens. The varying light phase shifts can be realized by, e.g., changing orientations of nanofins or changing diameters of nanopillars.

HIGH-DENSITY ENERGY DIRECTING DEVICES FOR TWO-DIMENSIONAL, STEREOSCOPIC, LIGHT FIELD AND HOLOGRAPHIC HEAD-MOUNTED DISPLAYS

Disclosed are high-density energy directing devices and systems thereof for two- dimensional, stereoscopic, light field and holographic head-mounted displays. In general, the head-mounted display system includes one or more energy devices and one or more energy relay elements, each energy relay element having a first surface and a second surface. The first surface is disposed in energy propagation paths of the one or more energy devices and the second surface of each of the one or more energy relay elements is arranged to form a singular seamless energy surface. A separation between edges of any two adjacent second surfaces is less than a minimum perceptible contour as defined by the visual acuity of a human eye having better than 20/40 vision at a distance from the singular seamless energy surface, the distance being greater than the lesser of: half of a height of the singular seamless energy surface, or half of a width of the singular seamless energy surface.

A SECURITY DEVICE WITH A FULL LENGTH LENS

A security device including a Fresnel lens covering the entire face of the device, a housing, and a pyroelectric detector is disclosed. The center portion of the Fresnel lens which contains the Fresnel lens elements is molded flat, it's edges are molded in the final installed form and its edges contain appendages that secure the lens on the device so there are no gaps between the lens and the device.

NUMERICAL APPROACHES FOR FREE-FORM LENSING: AREA PARAMETERIZATION FREE-FORM LENSING

A free-form lens (for example a phase modulator, lens or deformable mirror) may be made to reproduce a light pattern specified by image data. Source regions on the free-form lens are mapped to target regions areas on an image. Areas of the source regions are adjusted to vary the amount of light delivered to each of the target regions. Adjustment of the source areas may be achieved using a L-BFGS optimization which preferably incorporates smoothness and curl regularizers. Embodiments apply parallel processing to obtain control values for a free form lens in real time or near real time. Apparatus may process image data and display an image by controlling a dynamically variable free form lens using the processed image data.

ELECTROMAGNETIC RADIATION SENSING SYSTEM

An electromagnetic radiation sensing system, comprising sensing elements (604, 605, 606) and a Fresnel lens system for converging electromagnetic radiation; the sensing elements (604, 605, 606) are used to sense the electromagnetic radiation converged by the Fresnel lens system; the Fresnel lens system comprises at least two toothed faces (601, 602, 603) located on the same light path, each of the tooth faces comprising at least one Fresnel unit; at least one of the two toothed faces is a complex Fresnel refraction surface or a filled Fresnel refraction surface, or the two tooth faces are at a same physical interface and an element located thereon has a reflective back surface. The electromagnetic radiation sensing system can adequately utilize the advantage of the thinness of a Fresnel lens, and has better convergence without a significant increase in the thickness of the system, thus facilitating reducing of the size of a device and improving of the system performance.

COMPLEMENT OF POINT-OF-USE HAND-HELD FRESNEL MAGNIFYING LENSES WITH ATTACHMENTS

HIGH RESOLUTION HIGH CONTRAST EDGE PROJECTION

Generating a high definition projected illumination pattern from a substantially lower resolution digital projector array involves: selectively illuminating a connected set of pixels to produce a pixellated, high contrast edge feature, and positioning an anisotropically blurring optical element (ABOE) between a light source of the projector array and the projection. The ABOE applies an anisotropic blur pattern to pixels of the at least one connected set, to locally preferentially blur the pixel more (and preferably substantially only) in a direction of equally or more strongly illuminated pixels, and not in directions of less illuminated pixels. Preferably a contour of the connected set has no beginning or end within a periphery of the illumination plane, and has bounded curvature, permitting simple ABOEs to be used. Several images each having several or many edges can be produced using a same ABOE. The ABOE may alleviate interpixel gap effects for non-edge pixels too.

A KIND OF OPTICAL LENS AND A KIND OF MINER'S HELMET LAMP

The embodiments of the present invention provide a kind of optical lens and a kind of miner's helmet lamp. A kind of optical lens, comprising a reflective surface and a light exit surface; wherein, in a circle with the central position of the said reflective surface as its center, at least a light distribution camber and a reflective camber are set up along the radius direction of the said reflective surface; in a circle with the central position of the said light exit surface as its center, at least a Fresnel annular surface and a surface are set up along the radius direction of the said light exit surface; the said light distribution camber is used for refracting the light incident on the said reflective surface to the said Fresnel annular surface and the said surface; the said reflective camber is used for reflecting the light incident on the said reflective camber to the said surface in collimation; the said Fresnel annular surface is used for reflecting the light incident on the said ...

DISPERSIVE MICROLENS

Dispersive microlens apparatus (119) and methods are used in one mode for detecting multiple, different wavelengths (124A, 124B, 124C) from a bandwidth of wavelengths (existing within an image plane blur spot) and are used in another mode for combining a plurality of different, emitted wavelengths (151A, 151B, 151C) into a bandwave of wavelengths (at a blur spot in an image plane).

Verfahren zur Herstellung eines Presswerkzeuges für das Einpressen einer Rasterung in einen optischen Körper.

Lentille de projecteur à grande ouverture.

Verre de lanterne.

Dispositif optique présentant un objectif.

Lentille pour lampe de signalisation

Beleuchtungseinrichtung mit Stufenlinse.

Dispositif optique accessoire applicable aux appareils photographiques et cinématographiques.

Mehrbrennweitige Linse

Sphärisch korrigierte Fresneloptik mit partieller Feldkorrektion

Fresnel-Feldlinse

SPIEGELREFLEXKAMERA.

EINSTELLSCHIRM FUER EINE KAMERA UND VERFAHREN ZU DESSEN HERSTELLUNG.

Fresnellinse

Beam combiner for use in a head-mounted display device and beam splitter

A beam combiner for combining a first beam cluster with a second beam cluster that is not parallel to the first, to form a common beam cluster. The beam combiner includes a transparent body for the first beam cluster, which has a superimposition region that is encountered by the first beam cluster as it passes through the body. The superimposition region is split into a first section and a second section. Only the first section formed from interspaced reflective and/or refractive deflection elements causes a deflection of the second beam cluster by reflection and/or refraction, such that the first beam cluster forms the common beam cluster with the deflected second beam cluster once it has left the body.

Image projection device, image protection method, distance measuring device and distance measuring method

An image projection device includes: a variable-focus lens ( 2 ) in which focal length can be changed; scanning means ( 3 ) that scans a projection surface ( 12 ) by means of a light beam that is condensed by the variable-focus lens ( 2 ); distance-measuring means ( 9 ) that measures the distance from the variable-focus lens ( 2 ) to the projection surface ( 12 ); and control means ( 4 ) that controls the variable-focus lens ( 2 ) such that the focal length of the variable-focus lens ( 2 ) is greater than the distance measured by means of the distance-measuring means ( 9 ).

Fresnel lens structure and 2d/3d image switching display apparatus using the same

There is provided a Fresnel lens structure including: a Fresnel lens layer; and a planarization layer disposed on the Fresnel lens layer, any one of the Fresnel lens layer and the planarization layer being formed of a birefringent material and the other being formed of an isotropic material having a refractive index equal to a highest refractive index or a lowest refractive index of the birefringent material. In the Fresnel lens structure, a 2/3D image switching structure is simplified and switching thereof is easy. 2/3D switching can be performed without using an apparatus with complicated structure, whereby a stereoscopic image display apparatus structure may be simplified and manufacturing costs may be reduced as compared with a lenticular lens by using a Fresnel shaped lens structure.

Screens for use as displays of small-sized display devices with touch panel functions, and small-sized display devices with touch panel functions comprising said screens

A display screen for a small-sized display device with a touch panel function includes: a Fresnel lens sheet including a Fresnel lens portion and configured to convert image light projected from an image light source into light substantially parallel to the substantial normal direction of a screen surface and emit the converted light; and a light control sheet located on the image light exiting side of the Fresnel lens sheet. The light control sheet includes: unit light transmissive portions constituting part of the image light exiting surface of the light control sheet, the unit light transmissive portions extending in the transverse direction of the screen; and unit light absorbing portions constituting part of the image light exiting surface of the light control sheet, the unit light absorbing portions extending in the transverse direction of the screen, the unit light transmissive portions and the unit light absorbing portions being alternately arranged.

Method of making a nanostructure

A method of making a nanostructure is provided that includes applying a thin, random discontinuous masking layer ( 105 ) to a major surface ( 103 ) of a substrate ( 101 ) by plasma chemical vapor deposition. The substrate ( 101 ) can be a polymer, an inorganic material, an alloy, or a solid solution. The masking layer ( 105 ) can include the reaction product of plasma chemical vapor deposition using a reactant gas comprising a compound selected from the group consisting of organosilicon compounds, metal alkyls, metal isopropoxides, metal acetylacetonates, and metal halides. Portions ( 107 ) of the substrate ( 101 ) not protected by the masking layer ( 105 ) are then etched away by reactive ion etching to make the nanostructures.

Illuminator using a combination of pseudo-white led and lens sheet

There is provided an illuminator comprising: a light source; and a lens sheet that is arranged on the optical axis of the light source and that has a plurality of prisms, wherein the light source is composed of: a luminous element; and phosphors that irradiate with lights emitted from the luminous element, and the lens sheet includes prisms that have focal distances each different from the prisms adjacent thereto.

Optical structures formed with thermal ramps

This technology relates generally to a method of making an optical device. The method involves providing a glass carrier having a first surface, forming an optic structure in an at least partially transmissive layer, wherein the at least partially transmissive layer is adjacent the first surface of the glass carrier, and curing the at least partially transmissive layer using a thermal ramp up to a cure temperature at or within about 10° C. of an operating temperature of the optical device. This technology also relates to the resulting optical device and a system including an array of optical devices described herein and an array of photovoltaic cells configured with respect to the array of optical devices to convert light energy passing through the array of optical devices into electricity.

Traffic signal light device

A traffic signal light device that includes a spread window, a Fresnel lens, and an LED module for emitting light. The light emitted by the LED module passes through the Fresnel lens and to the spread window. The LED module is disposed at a position that is offset from an axis of the spread window that passes through a center of, and is perpendicular to, the spread window. The Fresnel lens can have a saw-toothed pattern of teeth formed as concentric circles on one surface of the Fresnel lens sharing a common center, where the size or height of the teeth vary. The spread window can have a plurality of protruding cells of varying size on a surface of the spread window.

CONCENTRATION-RATIO CONTROLLABLE SYSTEM IN THE SOLAR SIMULATOR FOR THE CONCENTRATE TYPE SOLAR CELLS

Provided is a concentration ratio controlling apparatus for concentration type solar cells that may adjust an opened area by mounting, to a lower portion of a solar simulator, a concentration ratio controlling apparatus combined with an adjustment unit capable of controlling the opened area and thereby adjusting the adjustment unit, and as a result, may adjust the quantity of light, that is, a concentration ratio, that is irradiated toward the surface of a solar cell disposed below a condenser by varying the quantity of light incident through a Fresnel lens disposed in a lower portion of the condenser. 1. A concentration ratio controlling apparatus for concentration type solar cells , the apparatus comprising:a first condensing unit to primarily concentrate quantity of light that is irradiated from a light source;a second condensing unit disposed between a lower portion of the first condensing unit and a solar cell to secondarily concentrate the quantity of light that has passed through the first condensing unit and thereby irradiate the secondarily concentrated light toward the solar cell;an adjustment unit disposed in an optical path between the light source and the first condensing unit to adjust a concentration area of the first condensing unit based on an external force, and thereby adjust the quantity of light that is concentrated by the first condensing unit; anda control unit to analyze an input signal and thereby supply a corresponding drive control signal to the adjustment unit.2. The apparatus of claim 1 , wherein:the first condensing unit is a Fresnel lens through which light incident in a direction vertical to a plane of incidence is refracted and thereby is concentrated on an area smaller than the plane of incidence.3. The apparatus of claim 2 , wherein:the second condensing unit is formed as a lens in a shape of a right column, and the second condensing unit is disposed in a lengthwise direction between the lower portion of the first condensing unit ...

FRESNEL LENS

A Fresnel lens comprises a first surface, and a second surface being the reverse side surface of the first surface and having a plurality of lens surfaces. Each lens surface is configured from a part of a side surface of an elliptical cone, which has an apex located on the second surface side and a bottom surface located on the first surface side. Here, in the Fresnel lens, any normal line intersecting with the lens surface configured from the part of the side surface of the elliptical cone among normal lines of respective points on the first surface is non-parallel to a central axis of the elliptical cone corresponding to the lens surface with which the any normal line intersects. 1. A Fresnel lens comprising:a first surface; anda second surface being the reverse side surface of the first surface, the second surface having a plurality of lens surfaces,wherein at least one of the plurality of lens surfaces is configured from a part of a side surface of an elliptical cone, andwherein any normal line intersecting with the lens surface configured from the part of the side surface of the elliptical cone among normal lines of respective points on the first surface is non-parallel to a central axis of the elliptical cone corresponding to the lens surface with which the any normal line intersects.2. The Fresnel lens according to claim 1 ,wherein at least two of the plurality of lens surfaces are configured from parts of side surfaces of elliptical cones having the different central axes respectively, andwherein as a lens surface among the at least two of the plurality of lens surfaces is located further outside, an angle formed by the normal line and the central axis of the elliptical cone corresponding to the lens surface becomes larger.3. The Fresnel lens according to claim 1 ,wherein a lens surface located on a center among the plurality of lens surfaces is configured from a part of an aspheric surface with continuously changing curvature, andwherein any normal line ...

DRIVER VISION FIELD EXTENDER

A driver vision field extender uses flexible vinyl Fresnel-type prism lens material with substantially parallel horizontal straight linearly extending prism lines. The parallel lines permit wide side by side views without substantial distortion. As the driver vision field extender is intended to be positioned contiguously along the windshield, the driver vision field extender after installation preferably exhibits a concave shape acting to focus the light defining and delineating overhead objects towards front-seated passengers such as the driver. 1. A Fresnel lens-type vision-extending device for extending an automobile driver's visual field of view , comprising:a plurality of prism lenses arranged on a front side of the device to be substantially in parallel, said lenses extending horizontally side to side linearly, wherein a back side of the device configured for attaching to the automobile windshield in a way that lines of the prism lenses substantially align with an upper horizontal edge of the windshield.2. The Fresnel lens-type vision-extending device as recited in claim 1 , wherein a length of the Fresnel lens-type vision-extending device is substantially equal to a horizontal length of the windshield.3. The Fresnel lens-type vision-extending device as recited in claim 1 , wherein the device is formed of soft plastic.4. The Fresnel lens-type vision-extending device as recited in claim 3 , wherein the back side of the device is affixed to the inner surface of the automobile windshield by static cling.5. The Fresnel lens-type vision-extending device as recited in claim 1 , wherein a length of the device is adjustable by a user prior to affixation.6. The Fresnel lens-type vision-extending device as recited in claim 5 , wherein the length of the device is half the length of the upper horizontal edge of the windshield.7. The Fresnel lens-type vision-extending device as recited in claim 2 , wherein device is configured to be positioned on the automobile windshield ...

Process for Manufacturing a Segmented Optical Structure

The present invention relates to a process for manufacturing a segmented optical structure (), comprising at least the steps consisting in: 118-. (canceled)20. The process of claim 19 , wherein step d) is initiated during or consecutively to step c).21. The process of claim 19 , wherein the liquid medium is discontinuously and controllably dispensed on at least one part of the top surface of the deposit produced in step b).22. The process of claim 19 , wherein the liquid medium is applied to at least 25% of the top surface of the deposit produced in step b).23. The process of claim 19 , wherein step c) claim 19 , step d) claim 19 , or steps c) and d) takes place in a chamber in which the temperature is between 3° C. and 50° C.24. The process of claim 19 , wherein step c) claim 19 , step d) claim 19 , or steps c) and d) takes place in a chamber in which the relative humidity is between 10% and 70%.25. The process of claim 19 , wherein the material in step b) is deposited in substantially all the voids.26. The process of claim 19 , wherein the deposit produced in step b) has a substantially constant height.27. The process of claim 19 , wherein the deposit produced in step b) has a varying height.28. The process of claim 19 , wherein a plurality of different materials are deposited in step b).29. The process of claim 19 , wherein a plurality of different liquid mediums are dispensed in step c).30. The process of claim 19 , wherein the microwalls comprise:an organic polymer;a hybrid sol-gel material; ora mixture thereof.31. The process of claim 30 , wherein the organic polymer is a photoresist in form of a liquid or in form of a dry film.32. The process of claim 30 , wherein the liquid medium comprises:an acid;an alcohol; anda photoresist developer.33. The process of claim 32 , wherein the acid is hydrofluoric acid and the alcohol is isopropyl alcohol claim 32 , ethanol claim 32 , or a mixture thereof.34. The process of claim 19 , wherein the amount of liquid medium ...

Collecting lens and multi-segment lens

A collecting lens comprises a first surface and a second surface. Said first surface lens is defined as an opposite surface of said collecting lens from said second surface. Said second surface has a lens surface. Said lens surface includes a plurality of lens function surfaces. Each of said lens function surfaces is defined as part of a side surface of corresponding one of elliptical cones. A particular normal line which is arbitrarily selected from normal lines at respective points on said first surface and crosses one of said lens function surface is not parallel to a central axis of the elliptical cone corresponding to said lens function surface crossed by said particular normal line. Said central axes of the elliptical cones are not parallel to each other.

BEZEL-CONCEALING DISPLAY COVERS AND DISPLAY DEVICES

Bezel-concealing display covers and display devices are disclosed. In one example, a bezel-concealing display cover includes a bezel and a display panel includes a perimeter portion having a first surface and a second surface such that the perimeter portion is configured to be offset from the bezel of the display device by a gap G. The bezel-concealing display cover further includes a first array of prisms on at least one of the first surface or the second surface of the perimeter portion that extend from an edge of the perimeter portion to a distance L. Each prism of the first array of prisms has a prism angle θ, and the first array of prisms is configured to shift a portion of an image proximate the bezel produced by the display panel such that the shifted portion of the image appears over the bezel to an observer. 1. A bezel-concealing display cover for coupling to a display device comprising a bezel and a display panel , the bezel-concealing display cover comprising:{'sub': 'A', 'a perimeter portion comprising a first surface and a second surface, wherein the perimeter portion is configured to be offset from the bezel of the display device by a gap G;'} each prism of the first array of prisms has a prism angle θ;', 'the first array of prisms is configured to shift a portion of an image proximate the bezel produced by the display panel such that the shifted portion of the image appears over the bezel to an observer; and', 'a central region bounded by the perimeter portion, wherein the first array of prisms is not present at the central region., 'a first array of prisms on at least one of the first surface or the second surface of the perimeter portion, the first array of prisms extending from an edge of the perimeter portion to a distance L, wherein2. The bezel-concealing display cover according to claim 1 , wherein the central region is substantially transparent.3. The bezel-concealing display cover according to claim 1 , wherein the perimeter portion comprises ...

Apparatus and Method for Detecting Tampering with an Infra-Red Motion Sensor

An infra-red motion detector for monitoring motion in a monitored space is described. The motion detector includes, within a housing, an infra-red radiation sensor sensitive to infra-red radiation incident through a window. A refractive optical system within the housing selects incident infra-red radiation for redirection onto the infra-red sensor. An external light source mounted externally of the housing directs external light through the window providing a recognizable light input. A refractive Fresnel patch mounted externally to the window selects incident light from the external light source and redirects it to a tamper sensor within the housing. A detection controller processes signals output by both sensors in monitoring the space. The detection controller detects incident light from the external light source and trips a tamper alarm in failing detection, and further detects changes in infra-red radiation in the monitored space and trips an intrusion alarm upon detecting changes.

MOLDED-ARTICLE MANUFACTURING METHOD, MOLD, AND OPTICAL ELEMENT INCLUDING FRESNEL LENS

A center-portion molding member having a center-portion transfer shape surface and a side wall surface is inserted and fitted in a frame-portion molding member having a frame-portion transfer shape surface to form a part of a cavity. The center-portion molding member has a groove portion in the side wall surface. The groove portion protrudes from the frame-portion transfer shape surface. Before injected resin transfers a shape of the center-portion transfer shape surface, the side wall surface of the center-portion molding member is sealed with the resin to form, between the center-portion transfer shape surface and the resin, a space in which gas is confined. 1. A molded-article manufacturing method that transfers shapes of a center-portion transfer shape surface , a side wall surface , and a frame-portion transfer shape surface provided in a cavity onto resin by injecting gas and the resin into the cavity ,wherein the side wall surface has a groove portion, andwherein a center-portion molding member is inserted and fitted in a frame-portion molding member to form the cavity so that a portion of the side wall surface from the frame-portion transfer shape surface to the groove portion protrudes.2. The molded-article manufacturing method according to claim 1 , wherein the frame-portion transfer shape surface is provided in the frame-portion molding member.3. The molded-article manufacturing method according to claim 1 , wherein the frame-portion transfer shape surface is provided in the center-portion molding member.4. The molded-article manufacturing method according to claim 1 , wherein the frame-portion transfer shape surface is provided in the frame-portion molding member and the center-portion molding member.5. The molded-article manufacturing method according to claim 1 , wherein a length of the portion of the side wall surface from the groove portion to the frame-portion transfer shape surface is within a range of 20 to 100 μm.6. The molded-article ...

Optical Elements on Textured Surfaces

The invention provides optical elements having a substrate with a textured surface, and a coating disposed on the textured surface. The coating is a multi-layer optical coating that provides desirable optical properties for the optical element. The coating is conformally disposed on the textured surface of the substrate. The invention also provides methods for making and methods for using such optical elements. 1. A method for forming an optical element comprising bilayers , the method comprising step(s):(a) alternately spraying polyelectrolyte and nanoparticle solutions onto a textured surface of a substrate, thereby depositing on the surface corresponding polyelectrolytes and nanoparticles and forming on the surface, in a layer-by-layer fashion, a plurality of nanoporous bilayers comprising polyelectrolyte and nanoparticle layers, wherein the polyelectrolyte and nanoparticle solutions each have a pH above 9.5.2. The method of claim 1 , wherein the average thickness of each bilayer is less than the average diameter of the nanoparticles.3. The method of claim 1 , wherein the average thickness of each bilayer is in the range of 75-87% of the average diameter of the nanoparticles.4. The method of claim 1 , wherein the pH of the nanoparticle solution is above 10.7.5. The method of claim 1 , further comprising:(b) spraying a rinse solution onto the surface after spraying each polyelectrolyte solution and after spraying each nanoparticle solution.6. The method of claim 1 , wherein step (a) further comprises spraying a rinse solution onto the surface after spraying each polyelectrolyte solution and after spraying each nanoparticle solution claim 1 ,wherein the polyelectrolyte solution, the nanoparticle solution, and the rinse solution each comprise salts sufficient to ensure that the thickness of the plurality of nanoporous bilayers does not vary by more than a factor of two over the substrate.7. The method of claim 1 , wherein step (a) further comprises spraying a rinse ...

METHOD FOR MANUFACTURING X-RAY/GAMMA-RAY FOCUSING OPTICAL SYSTEM USING ATOMIC LAYER DEPOSITION

The present invention relates to a method for manufacturing an X-ray/γ-ray focusing optical system comprising the steps of: providing a capillary substrate; and sequentially accumulating a plurality of alternation layers, each consisting of an X-ray/γ-ray opaque material and an X-ray/γ-ray transparent material, on an inner surface of the capillary substrate in a Fresnel pattern by atomic layer deposition. 1. A method of manufacturing an X-ray/γ-ray focusing optical system , comprising the steps of:providing a capillary substrate; andsequentially accumulating a plurality of alternation layers, each consisting of an X-ray/γ-ray opaque material and an X-ray/γ-ray transparent material, on an inner surface of the capillary substrate in a Fresnel pattern by atomic layer deposition.2. The method of manufacturing an X-ray/γ-ray focusing optical system according to claim 1 , wherein claim 1 , in the step of accumulating the plurality of alternation layers claim 1 , the thickness of each of the layers is controlled such that an innermost layer adjacent to the inner surface of the capillary substrate has a minimum thickness claim 1 , and an outermost layer far away from the inner surface of the capillary substrate has a maximum thickness.3. The method of manufacturing an X-ray/γ-ray focusing optical system according to claim 1 , wherein the atomic layer deposition comprises the steps of:injecting a precursor gas of a material to be deposited, which is selected from among the X-ray/γ-ray opaque material and the X-ray/γ-ray transparent material, into a capillary tube to adsorb the precursor gas onto an inner surface of the capillary tube;removing a residual precursor gas from the inner surface of the capillary tube, the residual precursor gas in the precursor gas injected into the capillary tube having not been adsorbed on the inner surface of the capillary tube;injecting a reaction gas, which reacts with the precursor gas to produce the material to be deposited, into the ...

SENSING METHOD AND SYSTEM FOR FRESNEL LENS

A sensing method and system for Fresnel lenses are disclosed, the system including a first Fresnel lens unit for sensing the signal of a target object crossing a first boundary of a sensing area, a second Fresnel lens unit for sensing the signal of a target object crossing a second boundary of the sensing area, a third Fresnel lens unit for sensing the signal of a target object crossing a third boundary of the sensing area, and a sensing unit for receiving and processing the sensed signals of the Fresnel lens units. The first and second Fresnel lens units are arranged on two sides of the third Fresnel lens unit. Furthermore, it is possible to add more Fresnel lens units above, below or around the Fresnel lens units. By monitoring the boundaries of the sensing area, the sensing method and system for the Fresnel lenses improve the insufficiency of the sensing area, reduce cost and save power consumption. 1. A Fresnel lens sensing method , comprising:predetermined sensing area, the sensing area having a first boundary, a second boundary and a third boundary;at least sensing signals of targets crossing the first boundary via a first Fresnel lens unit;at least sensing signals of targets crossing the second boundary via a second Fresnel lens unit;at least sensing signals of targets crossing the third boundary via a third Fresnel lens unit;receiving and processing the signals sensed by the Fresnel lens units via a sensing unit.2. The method of claim 1 , wherein the first boundary is left boundary claim 1 , the second boundary is right boundary claim 1 , the third boundary is frontal boundary.3. The method of claim 1 , the sensing area further having a fourth boundary claim 1 , the method further comprising:at least sensing signals of targets crossing the fourth boundary via a fourth Fresnel lens unit.4. The method of claim 3 , wherein the first boundary is left side claim 3 , the second boundary is right side claim 3 , the third boundary is front side claim 3 , the fourth ...

Lighting Systems and Methods of Using Lighting Systems for In Vitro Potency Assay for Photofrin

Presently disclosed is a lighting system and methods of using the lighting system for in vitro potency assay for photofrin. The lighting system includes a lamp housing, a first lens, an infrared absorbing filter, an optical filter, and a second lens. The lamp housing includes a lamp and a light-port. In operation, broad spectrum light from the lamp exits the lamp housing by passing through the light-port. The first lens then collimates the broad spectrum light that exits the lamp housing through the light-port. The infrared absorbing filter then passes a first portion of the collimated broad spectrum light to the optical filter and absorbs infrared light of the broad spectrum light. The optical filter then passes a second portion of the collimated broad spectrum light to the second lens. The second lens then disperses the second portion of the collimated light to provide uniform irradiation of a cell culture plate. A method of using the lighting system for studying a photosensitizer is also disclosed.

Lens module

There is provided a lens module including: a first lens including a first conical surface based on an optical axis and a first flat surface extending in a vertical direction with respect to the optical axis; and a second lens including a second conical surface based on an optical axis and a second flat surface extending in a vertical direction with respect to the optical axis, wherein the first conical surface and the first flat surface are connected by a first curved surface having a first radius, and the second conical surface and the second flat surface are connected by a second curved surface having a second radius.

VEHICULAR SIGNAL AND DAYTIME RUNNING LIGHT ASSEMBLIES WITH UNIFORM ILLUMINATION

A vehicular signal assembly that includes an inner chamber defined by a substrate comprising LED light sources and spaced apart, corresponding Fresnel lenses; and an outer chamber defined by the Fresnel lenses and an outer lens comprising optical elements. The outer lens can have a width of at least 12 mm. Further, each LED source emanates incident light directly through the chambers to produce a light pattern with a contrast ratio of 3:1 or less, e.g., a daytime running light pattern. Each LED source can also emanate incident light directly through the corresponding Fresnel lens an outer lens to produce the daytime running light pattern. 1. A vehicular signal assembly , comprising:an inner chamber defined by a substrate and spaced apart, corresponding Fresnel lenses; andan outer chamber defined by the lenses and an outer lens,the chambers non-linearly shaped, andthe substrate comprises a plurality of LED sources emanating light through the chambers into a light pattern with a contrast ratio of 3:1 or less.2. The assembly according to claim 1 , wherein the light pattern is characterized by a contrast ratio of 1.5:1 or less.3. The assembly according to claim 1 , wherein the outer lens comprises a plurality of optical elements that spread the light pattern into a non-circular or an asymmetric shape.4. The assembly according to claim 1 , wherein the chambers further comprise at least one right angle having a sharp corner.5. The assembly according to claim 1 , wherein each LED source is positioned to be within a focal length of the corresponding Fresnel lens.6. The assembly according to claim 1 , wherein the corresponding Fresnel lenses are configured within a single Fresnel lens substrate spaced apart from the substrate comprising the LED sources.7. The assembly according to claim 1 , wherein each LED source comprises a beam angle less than an angle formed between each LED source and an outermost portion of the corresponding Fresnel lens.8. A vehicular signal assembly ...

Electronically switching microlenses between optical states

An example electronic apparatus for switching microlenses includes a microlens including a plurality of microstructures to bend light. The electronic apparatus also includes a chamber coupled to the microlens to receive a liquid with an optical index that matches an optical index of the microlens. The electronic apparatus further includes an electronic device coupled to the chamber to manipulate the liquid to achieve a target optical state of the microlens.

AUGMENTED REALITY (AR) DISPLAY

A projection display having an optical waveguide for a see-though display system using Fresnel mirrors is disclosed. A display using this waveguide enables high resolution, free from chroma aberration, wide viewing angle, large eye-box and very compact size. 1. A display system comprisinga display device anda projection lens set anda light pipe andan in-coupling prism which input light rays from the display device and projection lens set into the light pipe andan out-coupling waveguide andfolding mirrors which reflect the light rays from the light pipe to the out-coupling waveguide whereinthe light pipe has a rectangular cross-section and the surfaces of the sides of the light pipe are reflective by coating or totally internal reflection (TIR) except an opening and the light rays can exit from the light pipe through the opening toward the folding mirrors which have saw-teeth shaped mirrors and reflect the rays to the out-coupling waveguide and the out-coupling waveguide has multiple saw-teeth shaped mirrors and reflects the rays toward the eye of a viewer.2. The display system of wherein:the projection lens set is telecentric and the principal rays emitted from the display device are substantially perpendicular to the surface of the display device and the principal rays from pixels cross each other at the inside or close to the in-coupling prism.3. The display system of wherein:the in-coupling prism has a reflective surface and the reflective surface receives light rays from the projection lens set and reflects the light rays into the light pipe and the normal vector of the reflective surface is between 15 and 45 degrees with respect to the optical axis of the projection lens set.4. The display system of wherein:the in-coupling prism has a reflective surface and the reflective surface receives light rays from the projection lens set and reflects the light rays into the light pipe and the normal vector of the reflective surface is rotated to form an angle between 30 ...

POLYHEDRON LENS ARCHITECTURE AND LENS SCANNING METHOD SUITABLE FOR THE POLYHEDRON LENS ARCHITECTURE

A polyhedron lens architecture is disposed in a virtual sphere. The virtual sphere has a horizontal plane, an upper hemisphere above the horizontal plane and a lower hemisphere below the horizontal plane. The polyhedron lens architecture has an upper half part above the horizontal plane, and a lower half part below the horizontal plane. The polyhedron lens architecture includes: multiple bases, which are respectively disposed on the upper half part and the lower half part; and multiple lenses respectively disposed on surfaces of the bases. Optical axes of the lenses intersect at a central point, which is located at the horizontal plane and is a structural center of the polyhedron lens architecture. 1. A polyhedron lens architecture disposed in a virtual sphere having a horizontal plane , an upper hemisphere above the horizontal plane , and a lower hemisphere below the horizontal plane , wherein the polyhedron lens architecture has an upper half part above the horizontal plane and a lower half part below the horizontal plane , the polyhedron lens architecture comprising:multiple bases, which are respectively disposed on the upper half part and the lower half part; andmultiple lenses respectively disposed on surfaces of the bases;wherein optical axes of the lenses intersect at a central point of the virtual sphere, the central point is located at the horizontal plane, and the central point is a structural center of the polyhedron lens architecture.2. The polyhedron lens architecture according to claim 1 , wherein lens surfaces of the lenses are inscribed to the virtual sphere claim 1 , and the bases are respectively disposed on the upper half part or the lower half part and equally divide the upper hemisphere or the lower hemisphere.3. The polyhedron lens architecture according to claim 2 , wherein the optical axes of the lenses are different from one another or each other claim 2 , and an included angle between one of the optical axes and the horizontal plane is ...

PRISM-ENHANCED LENSES AND METHODS OF USING PRISM-ENHANCED LENSES

An electro-active lens is presented which utilizes a surface relief structures and an electro-active material, with a change in refractive index facilitating the change in optical properties. A molded structure and a liquid crystal are used to form a diffractive lens. In addition to the classical approach of utilizing diffractive optics and multiple Fresnel zones to form a lens, an additional structure is placed between Fresnel zones in order to improve the diffraction efficiency across the visible spectrum and reduce chromatic aberration. 1. An electro-active lens comprising:a first substrate;a second substrate;a liquid crystal material disposed between the first substrate and the second substrate; anda surface relief structure formed in the first substrate opposite the second substrate, the surface relief structure defining a diffractive lens having a plurality of phase wrap regions and at least one prism structure, disposed between a pair of phase wrap regions in the plurality of phase wrap regions, to mitigate diffraction efficiency reductions at wavelengths higher and lower than a design wavelength of the diffractive lens.2. The electro-active lens of claim 1 , wherein an mth phase wrap region in the plurality of phase wrap region is a distance of at least{'br': None, 'i': r', 'mfλ, 'sub': m', '0, '=√{square root over (2)},'}{'sub': '0', 'from a center of the diffractive lens, where m is an integer greater than 1, f is a focal length of the diffractive lens, and λis a design wavelength of the electro-active lens.'}3. The electro-active lens of claim 1 , wherein the at least one prism structure comprises m−1 prism structures having an aggregate width w and an inner radius of the mth phase wrap region in the plurality of phase wrap regions is equal to a sum of rand w.4. The electro-active lens of claim 1 , wherein the at least one prism structure comprises an annular prism structure concentric with the pair of phase wrap regions.5. The electro-active lens of ...

DISPLAY APPARATUS

A display apparatus is disclosed. The display apparatus includes a display including an active area for displaying an image and a black matrix adjacent to the active area, and an optical sheet attached onto the display. The optical sheet includes a Fresnel pattern formed on the black matrix and a portion of the active area. The Fresnel pattern includes a plurality of peaks and a plurality of valleys, which are formed such that depths between the peaks and the valleys gradually increase from the active area to the black matrix. Therefore, it is possible to view an image in front of the black matrix, on which an image is not actually displayed. 1. A display apparatus comprising:a display comprising an active area for displaying an image and a black matrix adjacent to the active area; andan optical sheet coupled to the display,wherein the optical sheet comprises a Fresnel pattern portion corresponding to the black matrix and a portion of the active area, andwherein the Fresnel pattern portion comprises a plurality of peaks and a plurality of valleys and a depth of a first valley corresponding to the portion of the active area is less than a depth of a second valley corresponding to the black matrix.2. The display apparatus of claim 1 , wherein depths of the plurality of valleys increase from the first side to the second side.3. The display apparatus of claim 2 , wherein the depths gradually increase from the first side to the second side.4. The display apparatus of claim 1 , wherein the first side of the Fresnel pattern portion corresponds to the portion of the active area and the second side of the Fresnel pattern portion corresponds to the black matrix.5. The display apparatus of claim 4 , wherein the first side of the Fresnel pattern portion is positioned in front of the portion of the active area in a display direction and the second side of the Fresnel pattern portion is positioned in front of the black matrix in the display direction.6. The display apparatus ...

SUNLIGHT MODULATION DEVICE FOR SOLAR ENERGY UTILIZATION ON ILLUMINATION AND ENERGY GENERATION

A sunlight modulation device includes a light focusing module and a light deflection module. The light focusing module is configured to let incident sunlight pass through and to converge direct sunlight of the incident sunlight. The light deflection module is configured to separate the converged direct sunlight from diffusion sunlight of the incident sunlight by reflecting the converged direct sunlight. The above-mentioned sunlight modulation device allows more diverse configurations for solar panels, heating devices or the like means, as well as illumination purpose. 1. A sunlight modulation device comprising:a light focusing module configured to let incident sunlight pass through and to converge direct sunlight of the incident sunlight; anda light deflection module configured to separate the converged direct sunlight from diffusion sunlight of the incident sunlight by reflecting the converged direct sunlight.2. The sunlight modulation device according to claim 1 , wherein a size and/or a shape of the light deflection module is used to control amount of the diffusion sunlight passing through the light deflection module to illuminate an area underneath the light deflection module.3. The sunlight modulation device according to claim 1 , wherein the converged direct sunlight is converged on a focal region and the light deflection module is arranged on or adjacent to the focal region.4. The sunlight modulation device according to claim 1 , wherein the light focusing module comprises one or more Fresnel lenses.5. The sunlight modulation device according to claim 1 , wherein the light deflection module comprises a flat or curved reflecting surface.6. The sunlight modulation device according to claim 1 , wherein the light deflection module comprises plural flat and/or curved reflecting surfaces claim 1 , and the flat and/or curved reflecting surfaces are connected together or separated.7. The sunlight modulation device according to claim 6 , wherein the curved reflecting ...

FOVEATED NEAR TO EYE DISPLAY SYSTEM USING A COMPUTATIONAL FREEFORM LENS VIA SPATIAL LIGHT MODULATION OF A LASER PROJECTED IMAGE ONTO AN EMISSIVE FILM

A projection system projects images onto a projection surface in, for example, a computer game head-mounted display (HMD). The light is projected through a spatial light modulator that contains a phase-only image of a Freeform Fourier Lens that is a combination of a Fresnel lens, an X-phase grating, a Y-phase grating, and a radial grating. The freeform lens is a condensing freeform lens that causes the gradual shrinking of portions of the laser-projected image, decreasing the perceived pixel pitch in at least one foveal area on the projection surface compared to a non-modulated laser image. The center positions of the Fresnel lens and radial grating can be changed in the X and Y axes, moving the condensed foveal areas in accordance with eye tracking of the user. In effect, the system projects a Foveated image that contains variable pixel pitch such that a user perceives a higher visual acuity in his gaze direction to the projected surface. 1. An apparatus comprising:a projection system configured to project an image onto a projection surface through a spatial light modulator operably associated with a phase-only image of a Freeform Fourier Lens (FFL), the FFL comprising a Fresnel lens, an X-phase grating, a Y-phase grating, and a radial grating whereinthe FFL causes gradual shrinking of portions of images from the projection system, decreasing perceived pixel pitch in at least one foveal area on the projection surface,the gratings being configurable to move positions of the at least one foveal area within the image based on a user's eye gaze onto the projection surface.2. The apparatus of claim 1 , wherein the projection system and spatial light modulator are supported in a head-mounted display (HMD) or a video monitor.3. The apparatus of claim 1 , comprising at least one distortion/adjustment assembly configured to distort the image projected to the projection surface in accordance with a projection angle relative to the projection surface and a shape of the ...

Optics for an illumination device and illumination device

Optics ( 20 ) for an illumination device ( 1 ), as well as an illumination device ( 1 ) comprising such optics. The optics comprise at least one lens ( 30 ) with a light entry surface ( 31 ) and a light exit surface ( 32 ). A stepped lens structure ( 321 ), such as a Fresnel structure, is formed on the light exit surface. A recurring surface structure, such as periodically arranged prominences ( 311 ) and deepenings ( 321 ), are formed on the light entry surface ( 31 ).

META-SURFACE OPTICAL ELEMENT AND METHOD OF MANUFACTURING THE SAME

Provided are meta-surface optical device and methods of manufacturing the same. The meta-surface optical device may include a meta-surface arranged on a region of a substrate and a light control member arranged around the meta-surface. The light control member may be arranged on or below the substrate. A material layer formed of the same material used to form the meta-surface may be disposed between the light control member and the substrate. Also, the meta-surface may be a first meta-surface arranged on an upper surface of the substrate, and a second meta-surface may be arranged on a bottom surface of the substrate. Also, the meta-surface may include a first meta-surface and at least one second meta-surface may formed on the first meta-surface, and the light control member may be arranged around the at least one second meta-surface. 1. A meta-surface optical device comprising:a transparent substrate;a meta-surface disposed on a first region of one surface of the transparent substrate; anda light control member disposed on a second region of the one surface of the transparent substrate and configured to prevent light transmission,wherein the first region is surrounded by the second region and the light control member comprises a plurality of material patterns which have substantially similar height to that of the meta-surface.2. The meta-surface optical device of claim 1 , wherein the plurality of material patterns and the meta-surface comprise a same material as each other.3. The meta-surface optical device of claim 1 , wherein the plurality of material patterns uniformly distribute on the entire second region.4. The meta-surface optical device of claim 1 , wherein the meta-surface comprises a plurality of meta-patterns claim 1 , the plurality of meta-patterns having dimension different from that of the plurality of material patterns.5. The meta-surface optical device of claim 1 , wherein the plurality of material patterns are configured to reflect light incident ...

Low-profile optical arrangement

The present invention relates to an optical arrangement ( 1 ) having an optical axis (X) and comprising a base member ( 70 ), a cup shaped reflector ( 10 ) having an inner surface ( 12 ) facing towards the optical axis, at least one solid state light source ( 40, 42 ) arranged at the optical axis on the base member, and a lens comprising a center lens portion ( 20 ) and an annular lens portion ( 30 ), and arranged in front of the at least one solid state light source in a light exit direction. The center lens portion has a dome shaped outer surface ( 22 ) and the annular lens portion has an outer surface ( 32 ) with a convex shape facing the inner surface of the reflector. The reflector and the lens are formed together as one solid piece of material.

FRESNEL LENS WITH REDUCED DRAFT FACET VISIBILITY

A curved Fresnel lens is provided. The Fresnel lens includes a grooved surface and a smooth surface. The grooved surface includes a plurality of concentric sloped facets and a plurality of concentric draft facets. Pairs of concentric draft facets and concentric sloped facets form a plurality of concentric grooves in the grooved surface. The concentric sloped facets are configured to focus light toward an eye of a nominal user. At least some of the concentric draft facets are congruent with conical surfaces of respective imaginary light cones that have corresponding vertices that originate from respective focal points, wherein each imaginary light cone extends through the Fresnel lens at an angle based in part on an index of refraction of the Fresnel lens and extends beyond the grooved surface into free space. 1. A curved Fresnel lens comprising:a grooved surface and a smooth surface, the grooved surface comprising a plurality of concentric sloped facets and a plurality of concentric draft facets, pairs of concentric draft facets and concentric sloped facets forming a plurality of concentric grooves in the grooved surface, the plurality of concentric sloped facets configured to focus light toward an eye of a nominal user;at least some of the plurality of concentric draft facets being congruent with conical surfaces of respective imaginary light cones that have corresponding vertices that originate from respective focal points, wherein each respective imaginary light cone extends through the Fresnel lens at an angle based in part on an index of refraction of the Fresnel lens and extends beyond the grooved surface into free space.2. The Fresnel lens of wherein the grooved surface is a grooved convex surface claim 1 , and the smooth surface is a smooth concave surface.3. The Fresnel lens of wherein the grooved surface is a grooved concave surface claim 1 , and the smooth surface is a smooth convex surface.4. A Fresnel lens comprising:a grooved surface and a smooth ...

HEAD-MOUNTED DISPLAY APPARATUS

A head-mounted display apparatus includes a display unit including a plurality of emissive areas which displays images and a plurality of transmissive areas disposed between the emissive areas and which transmits light from external light sources, a first optical element which receives and converges light emitted from the display unit onto a predetermined area, and a second optical element disposed opposite to the first optical element with respect to the display unit and which receives and diverges light incident toward the display unit from an outside. 1. A head-mounted display apparatus comprising: a plurality of emissive areas which displays images; and', 'a plurality of transmissive areas disposed between the emissive areas and which transmits external light;, 'a display unit comprisinga first optical element which receives light from the display unit, wherein the first optical element converts light emitted from the emissive areas into polarized light in a first direction, and converts the external light transmitted through the transmissive areas into polarized light in a second direction; anda second optical element which receives light from the first optical element, wherein the second optical element converges the polarized light in the first direction onto a predetermined area, and transmits the polarized light in the second direction in substantially the same direction as an incident direction thereof on the second optical element.2. The head-mounted display apparatus of claim 1 , wherein the first optical element comprises:a polarizer disposed to correspond to the emissive areas and the transmissive areas; and a first liquid crystal disposed to correspond to the emissive areas; and', 'a second liquid crystal disposed to correspond to the transmissive areas., 'a liquid crystal layer which receives light transmitted through the polarizer and comprising3. The head-mounted display apparatus of claim 1 , wherein the second optical element comprises:a first ...

Fresnel lens, fresnel lens unit, and head-up display

The present invention provides a Fresnel lens that can reduce generation of concentric stray light. The Fresnel lens includes a sawtooth corrugated face that is formed by alternately disposing a first face inclined relative to optical axis A and a second face substantially parallel to optical axis A, and a light shielding mask is formed at a position corresponding to the second face.

VR LENS STRUCTURE AND DISPLAY DEVICE

A VR lens structure and a display device are provided. The VR lens structure includes a first lens and a second lens disposed opposite to each other. The first lens is provided with a first side surface and a second side surface which are disposed opposite to each other, and at least one of the first side surface and the second side surface is an aspheric surface. The second lens is a Fresnel lens, a smooth surface of the second lens is disposed proximal to the second side surface, and a Fresnel surface of the second lens is disposed farther away from the second side surface than the smooth surface. 1. A VR lens structure , comprising a first lens and a second lens which are disposed opposite to each other; wherein ,the first lens is provided with a first side surface and a second side surface which are disposed opposite to each other, and at least one of the first side surface and the second side surface is an aspheric surface; andthe second lens is a Fresnel lens, a smooth surface of the second lens is disposed proximal to the second side surface, and a Fresnel surface of the second lens is disposed farther away from the second side surface than the smooth surface.2. The VR lens structure according to claim 1 , wherein the first side surface and the second side surface of the first lens are both aspheric surfaces;a middle area of the first side surface protrudes away from the second side surface, and an edge area of the first side surface protrudes towards the second side surface; andthe second side surface protrudes away from the first side surface.3. The VR lens structure according to claim 1 , wherein the first side surface and the second side surface of the first lens are both aspheric surfaces;the first side surface protrudes away from the second side surface; andthe second side surface protrudes away from the first side surface.4. The VR lens structure according to claim 1 , wherein the smooth surface of the second lens comprises a plane or an aspheric ...

OPTICAL PART, METHOD FOR PRODUCING OPTICAL PART, AND IMAGE DISPLAY APPARATUS

To achieve the above described purpose, an optical part according to an embodiment of the present technology includes an optical section and a multi-layer film. The optical section includes a first surface and a second surface constituting a recessed section or a protruded section in cooperation with the first surface. The multi-layer film is formed on the first surface and the second surface, and includes an absorption layer for absorbing light and an upper layer including low refractive index material covering the absorption layer. 1. An optical part comprising:an optical section that includes a first surface and a second surface constituting a recessed section or a protruded section in cooperation with the first surface; anda multi-layer film that is formed on the first surface and the second surface and that includes an absorption layer for absorbing light and an upper layer including low refractive index material covering the absorption layer.2. The optical part according to claim 1 ,wherein the first surface has a predetermined function related to incident light.3. The optical part according to claim 1 ,wherein the multi-layer film has optical absorption property depending on an incident angle of the light.4. The optical part according to claim 1 ,wherein the multi-layer film has higher absorptance with respect to internal light that is incident on the multi-layer film from an inside of the optical section at the incident angle of 50° or more, than absorptance with respect to external light that is incident on the multi-layer film from an outside of the optical section at the incident angle of approximately 0°.5. The optical part according to claim 1 ,wherein the multi-layer film has higher absorptance with respect to internal light that is incident on the multi-layer film from an inside of the optical section, as the incident angle increases.6. The optical part according to claim 1 ,wherein the multi-layer film has reflectance of 4% or less with respect to ...

Light source device and projector

A light source device includes a semiconductor light-emitting element; an optical element including lens regions that change an intensity distribution of light emitted from the semiconductor light-emitting element; and a phosphor element that emits, as excitation light, the light with the intensity distribution changed by the optical element. Respective focal points of the lens regions are present in front of or behind a light-emitting surface of the phosphor element in different positions. At least one of the lens regions is astigmatic. An excitation beam from the at least one of the lens regions with the astigmatism forms a circle of least confusion near an associated one of the focal points, and a first focal line and a second focal line sandwiching the circle behind and in front of the circle, respectively. Beams from the lens regions overlap each other on the light-emitting surface of the phosphor element.

VISIBLE LIGHT COMMUNICATION (VLC) OPTICAL RECEIVER

A visible light communication (VLC) optical receiver () is provided, the receiver () includes a photodetector; and a modified Fresnel lens (), characterised in that the lens () is curved into a convex shape such that multiple focal points () are created when light from a light source is diffracted through the lens () allowing the light signal to be received by the photodetector at the different positions of the photodetector corresponding to said focal points. 1100100. A visible light communication (VLC) optical receiver () , the receiver () includes;{'b': '103', 'a photodetector; and a modified Fresnel lens ();'}{'b': 103', '110', '103', '110, 'characterised in that the lens () is curved into a convex shape such that multiple focal points () are created when light from a light source is diffracted through the lens () allowing the light signal to be received by the photodetector at the different positions of the photodetector corresponding to said focal points ().'}2100103. The VLC receiver () as claimed in claim 1 , wherein the Fresnel lens () has a decreased focal length and diameter to enhance receiver power.3100. The VLC receiver () as claimed in claim 1 , wherein the photodetector may be positioned such that the received power is optimally the highest at an incident plane with the photodetector.4100101105. The VLC receiver () as claimed in claim 1 , wherein the light source used is an LED () and the photodetector used is a photodiode ().5100105. The VLC receiver () as claimed in claim 1 , wherein the photodetector is a photodiode array ().6100101105. The VLC receiver () as claimed in claim 1 , wherein efficiency of the received power is increased up to a relatively longer distance between an LED () and the photodiode () compared to efficiency of an unmodified lens.7100101105. The VLC receiver () as claimed in claim 1 , wherein efficiency of the received power is increased up to a relatively wider angle between an LED () and the photodiode () compared to ...

Augmented Reality Eyewear with "Ghost Buster" Technology

This invention is augmented reality eyewear with a radial, honeycomb, or nested-ring array of selectively-movable reflective elements. These reflective elements can each be moved from a first configuration which is parallel to a line of sight from an eye to a second configuration which is perpendicular to this line of sight. The second configuration reflects light displaying a virtual image to the eye and blocks environmental light in the area of the virtual image. Since light from the environment does not shine through the virtual object, the virtual object appears solid instead of “ghost like.”

TOUCH SENSING APPARATUS

A touch sensing apparatus is disclosed comprising a panel that defines a touch surface extending in a plane having a normal axis, emitters and detectors arranged along a perimeter of the panel, a light directing element arranged adjacent the perimeter, the emitters are arranged to emit a respective beam of light and the light directing element is arranged to receive the beam of light through a first surface and couple out the beam of light through a second surface to direct the beam of light across the touch surface substantially parallel to the touch surface, the beam of light is received through the first surface at a first distance from the touch surface and is deflected by the light directing element to the second surface to couple out the beam of light at a second distance from the touch surface, wherein the first distance is greater than the second distance. 1. A touch sensing apparatus comprising:a panel that defines a touch surface extending in a plane having a normal axis,a plurality of emitters and detectors arranged along a perimeter of the panel,a light directing element arranged adjacent the perimeter,wherein the emitters are arranged to emit a respective beam of light and the light directing element is arranged to receive the beam of light through a first surface and couple out the beam of light through a second surface to direct the beam of light across the touch surface substantially parallel to the touch surface,wherein the beam of light is received through the first surface at a first distance from the touch surface and is deflected by the light directing element to the second surface to couple out the beam of light at a second distance from the touch surface, wherein the first distance is greater than the second distance.2. A touch sensing apparatus according to claim 1 , wherein the first surface receives light from a plurality of light beams across a surface area having a first projected width on the normal axis claim 1 ,wherein the received ...

Head Mounted Display With Lens

A head mounted display device that displays three dimensional images from a mobile device, which includes a viewing assembly, a housing, a mobile device holder, connected to the housing, a reflecting surface, connected to the housing that reflects images displayed by the mobile device, a lens, and an eyepiece onto which the reflecting surface reflects the images through the lens. 1. A head mounted display device for displaying images from a mobile device , comprising:a housing that secures an inserted mobile device, which fits on the head of a human viewer, the mobile device comprising a forward-facing side with a display;a reflecting surface, connected to the housing, that reflects images displayed by the mobile device display;one or more lenses, connected to the housing, that focuses the images reflected by the reflecting surface, andan eyepiece, connected to the housing, that reflects the images from the one or more lenses into the eye of the viewer.2. The device of wherein the one or more lenses consist of two lenses claim 1 , a right lens and a left lens.3. The device of claim 2 , wherein each of the two lenses is a Fresnel lens.4. The device of claim 1 , wherein the housing fits a mobile device with a display of at least four diagonal inches.5. The device of claim 1 , wherein the reflecting surface is sufficiently large to reflect substantially all of the light emanating from the mobile device display.6. The device of claim 1 , wherein said mobile device displays a first image on its right side and a second image on its left side and wherein said reflecting surface comprises a right mirror that reflects the first and a left mirror that reflects the second image.7. The device of claim 6 , wherein said housing further comprises an opaque optical block that prevents the first image from crossing over to the left mirror and prevents the second image from crossing over to the right mirror.8. The device of claim 1 , wherein the eyepiece comprises two separate ...

HIGH CONTRAST PROJECTION SCREEN WITH STRAY LIGHT REJECTION

A multi-layer projection screen includes a stray light rejection layer and a lens array. The stray light rejection layer includes an array of pillar structures, wherein each pillar structure of the array of pillar structures includes an entrance aperture, an exit aperture, a pathway extending from the entrance aperture to the exit aperture, and a side wall surrounding the pathway. The lens array is optically aligned to the array of pillar structures. The stray light rejection layer blocks display light received from the lens array having an oblique trajectory that is greater than a threshold angle from a first trajectory. 1. A multi-layer projection screen , comprising: an entrance aperture;', 'an exit aperture;', 'a pathway extending from the entrance aperture to the exit aperture; and', 'one or more side walls surrounding the pathway; and, 'a stray light rejection layer including an array of pillar structures, wherein each pillar structure of the array of pillar structures includesa lens array optically aligned to the array of pillar structures such that each lens of the lens array focuses first display light having a first trajectory through the entrance and exit apertures of a corresponding pillar structure while second display light having an oblique trajectory that is greater than a threshold angle from the first trajectory is directed onto the side wall and substantially blocked from passing through the exit aperture.2. The multi-layer projection screen of claim 1 , wherein the one or more side walls and the pathway are formed of materials having substantially similar refractive indexes.3. The multi-layer projection screen of claim 1 , wherein the exit aperture has a smaller cross-sectional area than the entrance aperture.4. The multi-layer projection screen of claim 3 , wherein each of the one or more side walls separating adjacent pathways has a T-shaped cross-section.5. The multi-layer projection screen of claim 3 , wherein the pathway has a truncated cone ...

Collimating And Concentrating Light Into An Optical Fiber

The present disclosure provides an optical design configured to achieve an increased concentration and improved coupling of light to an optical fiber for a passive lighting system. Light may be passed through a collector lens followed by collimation and concentration to yield improved coupling of light to an optical fiber. Additionally, the optical design reduces the total number of optical fibers required to achieve effective illumination.

OPTICAL FINGERPRINT IDENTIFICATION SYSTEM AND OPTICAL FINGERPRINT IDENTIFICATION DEVICE

An optical fingerprint identification system includes a base, a photo sensor, a light emitting layer and a cover. The photo sensor is disposed on the base. The light emitting layer is disposed above the photo sensor, and the light emitting layer includes a light emitting element. The cover is disposed above the light emitting layer. The optical fingerprint identification system further includes a light path adjusting element between the photo sensor and the cover. The light emitting element is disposed away from the light path adjusting element and the photo sensor in a sideway direction that is different from a stack direction of the optical fingerprint identification system. 1. An optical fingerprint identification system , comprising:a base;a photo sensor, disposed on the base;a light emitting layer, disposed above the photo sensor, wherein the light emitting layer comprises a light emitting element; anda cover, disposed above the light emitting layer;wherein the optical fingerprint identification system further comprises a light path adjusting element between the photo sensor and the cover;wherein the light emitting element is disposed away from the light path adjusting element and the photo sensor in a sideway direction that is different from a stack direction of the optical fingerprint identification system.2. The optical fingerprint identification system of claim 1 , wherein the light path adjusting element comprises a wedge prism.3. The optical fingerprint identification system of claim 2 , further comprising a condenser lens element disposed above the photo sensor and below the light path adjusting element.4. The optical fingerprint identification system of claim 3 , further comprising a condenser medium layer disposed below the condenser lens element claim 3 , wherein a refractive index of the condenser medium layer is nA claim 3 , and the following condition is satisfied:{'br': None, '1.60 Подробнее

LIGHT SOURCE DEVICE AND PROJECTOR

A light source device includes: a first light source section and a second light source section configured to emit light along two different directions; a light combining member configured to combine the light emitted from the first light source section with the light emitted from the second light source section; a light source casing to which the first light source section and the second light source section are attached outside; and a holding member configured to hold the light combining member, the holding member accommodated inside the light source casing. The holding member is fixed inside the light source casing. 1. A light source device comprising:a first light source section and a second light source section configured to emit light along two different directions;a light combining Member configured to combine the light emitted from the first light source section with the light emitted from the second light source section;a light source casing to which the first light source section and the second light source section are attached outside; anda holding member configured to hold the light combining member, the holding member accommodated inside the light source casing,wherein the holding member is fixed inside the light source casing.2. The light source device according to claim 1 , further comprisinga condensing lens configured to condense the light combined together by the light combining member,wherein the holding member holds the condensing lens.3. The light source device according to claim 2 , further comprisinga pressing member configured to press the condensing lens toward the holding member.4. The light source device according to claim 1 , further comprising:an optical component on which light emitted from the light source casing is incident; andan accommodation casing configured to accommodate the optical component, the accommodation casing connected to the light source casing, a first casing having an opening in which the optical component is inserted ...

OPTICAL DEVICE AND ILLUMINATION DEVICE

An optical device comprises: at least one first reflecting surface disposed so as to reflect first light that has a light distribution having an optical axis parallel to a first axis, to an arc-shaped first region surrounding the first axis; and a second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the first reflecting surface is disposed between the second reflecting surface and the third reflecting surface. 1. An optical device comprising:at least one first reflecting surface disposed so as to reflect at least a part of first light to an arc-shaped first region surrounding a first axis, the first light having a light distribution with an optical axis parallel to the first axis; anda second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the at least one first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.2. The optical device according to claim 1 , wherein the second reflecting surface and/or the third reflecting surface meets the at least one first reflecting surface.3. The optical device according to claim 1 , wherein the at least one first reflecting surface comprises a plurality of first reflecting surfaces separated from each other in a direction along the first axis.4. The optical device according to claim 3 , wherein: the plurality of first reflecting surfaces, and', 'a plurality of transmitting surfaces, each corresponding to a respective one of the plurality of first reflecting surfaces,', 'wherein the plurality of first reflecting surface and the plurality of transmitting surfaces form a multi-stepped inner surface of the optical element, and, 'the optical device comprises an optical element that comprisesthe optical ...

MULTIPLE STATE ELECTROACTIVE OPHTHALMIC DEVICE

A variable focus ophthalmic device is described. The device comprises a front curve optical portion of the variable focus ophthalmic device comprising a front curve top optical surface and a front curve bottom optical surface and a back curve optical portion of the variable focus ophthalmic device comprising a back curve top optical surface and a back curve bottom optical surface. A cavity is formed by the front curve bottom optical surface of the front curve optical portion of the variable ophthalmic device and the back curve top optical surface of the back curve portion of the variable focus ophthalmic device. A fluid with a first index of refraction and a dielectric film is in contact with at least a portion of the fluid with a first index of refraction and overlaying an electrode capable of establishing an electric field. A gas with a second index of refraction is provided, wherein the first index of refraction and the second index of refraction are different. One or more reservoir regions operable to change its volume for containment of a volume less than or equal to the volume of said fluid are provided and wherein the reservoir is in fluid connection with said formed cavity. 1. A variable focus ophthalmic device comprising:a front curve optical portion of the variable focus ophthalmic device comprising a front curve top optical surface and a front curve bottom optical surface;a back curve optical portion of the variable focus ophthalmic device comprising a back curve top optical surface and a back curve bottom optical surface;a cavity formed by the front curve bottom optical surface of the front curve optical portion of the variable ophthalmic device and the back curve top optical surface of the back curve portion of the variable focus ophthalmic device;a fluid with a first index of refraction in contact with at least a portion of the fluid with a first index of refraction;a gas with a second index of refraction, wherein the first index of refraction and the ...

LIGHT-EMITTING OPTOELECTRONIC MODULES

Light-emitting optoelectronic modules operable to generate an emission characterized by reduced speckle can include a coherent light source, a diffuser, and a Fresnel element. The coherent light source is operable to generate a coherent emission, characterized by a coherence length, incident on the diffuser. The diffuser is characterized by a divergence angle. The divergence angle is the angle between a first path-length from the diffuser to a Fresnel element and a second path-length from the diffuser to the Fresnel element, wherein their difference defines a path difference. In some instances, the path difference is substantially larger than the coherence length. 1. A light-emitting optoelectronic module comprising:a coherent light source operable to generate coherent light, the coherent light being characterized by a coherence length, a bandwidth, and a center wavelength;a diffuser, characterized by a divergence angle, the diffuser being positioned with respect to the coherent light source such that the coherent light is incident on the diffuser and the diffuser is operable to generate a diffuse emission; anda Fresnel lens element including an array of Fresnel rings;wherein the Fresnel lens element is positioned with respect to the diffuser such that the diffuse emission is incident on the Fresnel lens element and the Fresnel lens element generates an emission.2. The light-emitting optoelectronic module of claim 1 , wherein the divergence angle is an angle between a first path-length from the diffuser to the Fresnel lens element and a second path-length from the diffuser to the Fresnel lens element claim 1 , the first and second path-lengths emanating from a same point on the diffuser.3. The light-emitting optoelectronic module of claim 2 , wherein the first path-length is orthogonal to the diffuser and the Fresnel lens element.4. The light-emitting optoelectronic module of claim 3 , wherein the difference in length between the first and second path lengths is a ...

Refraction lens and plate-form structure which has multiple refraction lenses extending therethrough

A refraction lens is integrally formed by transparent material including glass and acrylic. The refraction lens includes a body, wherein an incidence face and a light emitting face respectively formed on two opposite sides of the body. In the preferred embodiment, the body is a cylindrical structure, the incidence face is convex structure and the emitting face has at least one collecting unit formed thereon. The at least one collecting unit includes multiple collecting portions arranged in array, wherein each collecting portion is peripherally protruded from the emitting face. Each correcting portion is formed with a curved top for providing a dotted collecting effect.

SYNTHETIC DIAMOND OPTICAL ELEMENTS

An optical element comprising: synthetic diamond material; and a flattened lens surface structure in the form of a zone plate, Fresnel lens, or a spherical lens formed directly in at least one surface of the synthetic diamond material, wherein the synthetic diamond material has an absorption coefficient measured at room temperature of ≦0.5 cmat a wavelength of 10.6 μm, and wherein the synthetic diamond material has a laser induced damage threshold meeting one or both of the following characteristics: the laser induced damage threshold is at least 30 Jcmmeasured using a pulsed laser at a wavelength of 10.6 μm with a pulse duration of 100 ns and a pulse repetition frequency in a range 1 to 10 Hz; and the laser induced damage threshold is at least 1 MW/cmmeasured using a continuous wave laser at a wavelength of 10.6 μm. 1. An optical element comprising:synthetic diamond material; anda flattened lens surface structure in the form of a zone plate, Fresnel lens, or aspherical lens formed directly in at least one surface of the synthetic diamond material,{'sup': '−1', 'wherein the synthetic diamond material has an absorption coefficient measured at room temperature of ≦0.5 cmat a wavelength of 10.6 μm, and'}wherein the synthetic diamond material has a laser induced damage threshold meeting one or both of the following characteristics:{'sup': '−2', 'the laser induced damage threshold is at least 30 Jcmmeasured using a pulsed laser at a wavelength of 10.6 μm with a pulse duration of 100 ns and a pulse repetition frequency in a range 1 to 10 Hz; and'}{'sup': '2', 'the laser induced damage threshold is at least 1 MW/cmmeasured using a continuous wave laser at a wavelength of 10.6 μm.'}2. An optical element according to claim 1 ,{'sup': −2', '−2', '−2', '−2', '−2, 'wherein the laser induced damage threshold is at least 50 Jcm, 75 Jcm, 100 Jcm, 150 Jcm, or 200 Jcmmeasured using said pulsed laser.'}3. An optical element according to claim 1 ,{'sup': 2', '2', '2', '2, 'wherein the ...

OPTICAL DEVICE

According to one embodiment, an optical device includes first and second optical elements. The first optical element is disposed on a display surface. The first optical element includes first and second surfaces. A first light emitted from the display surface is incident on the first surface. The first optical element includes transmissive portions and non-transmissive portions. Each of the transmissive portions extends in a first direction parallel with the first surface. Each of the non-transmissive portions is disposed between the transmissive portions. A light transmittance of the non-transmissive portions is lower than that of the transmissive portions. A second light emitted from the second surface is incident on the second optical element, which emits the second light as a third light. An optical axis of the third light is tilted with respect to an optical axis of the second light in a plane perpendicular to the second direction. 1. An optical device comprising: a first surface, a first light emitted from the display surface being incident on the first surface, and', 'a second surface being opposite to the first surface,', 'the first optical element including a plurality of transmissive portions and a plurality of non-transmissive portions,', 'each of the transmissive portions extending in a first direction parallel with the first surface,', 'the transmissive portions being arranged in a second direction perpendicular to the first direction and parallel with the first surface,', 'each of the non-transmissive portions being disposed between the transmissive portions,', 'a light transmittance of the non-transmissive portions being lower than a light transmittance of the transmissive portions; and, 'a first optical element being to be disposed on a display surface of a display, the first optical element including'}a second optical element disposed on the first optical element, a second light emitted from the second surface being incident on the second optical ...

OPTICAL ELEMENT AND METHOD FOR MANUFACTURING THE SAME

An optical element includes first and second optical portions, and a first connection region. The first optical portion has first and second surfaces opposed each other. The first optical portion is light transmissive. The second optical portion has a third surface opposing the first surface and separated from the first surface, and a fourth surface on an opposite side to the third surface. The second optical portion is light transmissive. The first connection region connects at least a portion of an end of the first optical portion and at least a portion of an end of the second optical portion, and provides a seamless connection to the first and second optical portions. The first connection region is light transmissive. At least one of the first or second surfaces includes a portion slanted to a plane perpendicular to a first direction from the second optical portion toward the first optical portion. 1. An optical element comprising:a first optical portion having a first surface and a second surface on an opposite side to the first surface, the first optical portion being light transmissive;a second optical portion having a third surface opposing the first surface and separated from the first surface, and a fourth surface on an opposite side to the third surface, the second optical portion being light transmissive; anda first connection region connecting at least a portion of an end of the first optical portion and at least a portion of an end of the second optical portion, and providing a seamless connection to the first optical portion and the second optical portion, the first connection region being light transmissive,at least one of the first surface or the second surface including a portion slant to a plane perpendicular to a first direction from the second optical portion toward the first optical portion.2. The optical element according to claim 1 , whereinat least one of the third surface or the fourth surface includes the portion slant to the plane.3. The ...

OPTICAL DEVICE

According to one embodiment, an optical device includes a first optical element and a second optical element. The first optical element has first and second surfaces. A first light emitted by a display is incident on the first surface. The first optical element includes transmissive portions and non-transmissive portions. Each of the transmissive portions extends in a first direction parallel to the first surface. The non-transmissive portions are respectively disposed in regions between the transmissive portions. A light transmittance of the non-transmissive portions is lower than that of the transmissive portions. A second light emitted from the second surface is incident on the second optical element, which emits a third light by condensing the second light. An optical axis of the third light is tilted with respect to an optical axis of the second light in a plane parallel to the first direction. 1. An optical device , comprising:a first optical element having a first surface and a second surface, a first light emitted by a display being incident on the first surface, the first optical element including a plurality of transmissive portions and a plurality of non-transmissive portions, each of the transmissive portions extending in a first direction parallel to the first surface, the non-transmissive portions being respectively disposed in regions between the transmissive portions, a light transmittance of the non-transmissive portions being lower than a light transmittance of the transmissive portions; anda second optical element, a second light emitted from the second surface being incident on the second optical element, the second optical element emitting a third light by condensing the second light, an optical axis of the third light being tilted with respect to an optical axis of the second light in a plane parallel to the first direction.2. The device according to claim 1 , whereinthe second optical element has a third surface and a fourth surface, the ...

CLOAKING DEVICES WITH CONVERGING LENSES AND A HEXAGONAL PRISM AND VEHICLES COMPRISING THE SAME

A cloaking device assembly comprises an object-side, an image-side, a reference optical axis extending from the object-side to the image-side, a cloaked region positioned between the object-side and the image-side and a cloaked article positioned within the cloaked region. An object-side converging lens is positioned on the object-side, an image-side converging lens is positioned on the image-side, and a hexagonal prism is positioned within the cloaked region between the object-side converging lens and the image-side converging lens. Light from an object positioned on the object-side of the cloaking device and obscured by the cloaked region propagates through the object-side converging lens, the hexagonal prism, and the image-side converging lens to form an image of the object on the image-side of the cloaking device such that the cloaked region and the cloaked article within the cloaked region do not appear to be positioned between the object and the image. 1. A cloaking device comprising:an object-side, an image-side, a reference optical axis extending from the object-side to the image-side, and a cloaked region positioned between the object-side and the image-side;an object-side converging lens positioned on the object-side;an image-side converging lens positioned on the image-side; anda hexagonal prism positioned within the cloaked region between the object-side converging lens and the image-side converging lens;wherein light from an object positioned on the object-side of the cloaking device and obscured by the cloaked region propagates through the object-side converging lens, the hexagonal prism, and the image-side converging lens to form an image of the object on the image-side of the cloaking device such that the cloaked region does not appear to be positioned between the object and the image.2. The cloaking device of claim 1 , wherein the object-side converging lens and the image-side converging lens each have an outward facing convex surface and an inward ...

ULTRA THIN FRESNEL LENSES AND OTHER OPTICAL ELEMENTS

Ultra thin Fresnel lenses and methods of forming the same are described herein. An optical element comprising an ultra thin Fresnel lens includes a plurality of Fresnel elements formed on a surface of a substrate. Each of the plurality of Fresnel surface elements has an angled facet portion and a shallow or substantially horizontal portion. The Fresnel surface elements can be formed, for example, by a hot stamp or cold transfer method. 1. An optical element , said optic element having first and second surfaces separated from each other in a vertical direction , said optical element comprising:a plurality of Fresnel lens elements spaced in a horizontal direction with respect to each other, said plurality of Fresnel lens elements comprising angled facet portions and substantially horizontal portions, said plurality of Fresnel lens elements closer in said vertical direction to said first surface than said second surface,wherein said angled facet portion has a depth that is on average less than about 5 microns.2. The optical element of claim 1 , wherein the depth is on average less than about 2.5 microns.3. The optical element of claim 1 , wherein the depth is on average less than about 1 micron.4. The optical element of claim 1 , wherein the vertical distance from (i) points of the angled facet portion closest to said second surface to (ii) the part of the closest substantially horizontal portion farthest from the second surface is on average less than 5 microns.5. The optical element of claim 1 , wherein the vertical distance from (i) points of the angled facet portion closest to said second surface to (ii) the part of the closest substantially horizontal portion farthest from the second surface is on average less than 2.5 microns.6. The optical element of claim 1 , wherein the vertical distance from (i) points of the angled facet portion closest to said second surface to (ii) the part of the closest substantially horizontal portion farthest from the second surface is ...

COMPOUND LENS AND DISPLAY DEVICE HAVING THE SAME

Provided are a compound lens and a display device including the same. The compound lens may improve image quality by providing a higher resolution in a central image region and a lower resolution in a peripheral image region. The compound lens includes a central lens portion and at least one peripheral lens portion, the at least one peripheral lens portion surrounds the central lens portion, the central lens portion has a first focal length, the at least one peripheral lens portion has a second focal length, and the first focal length is greater than the second focal length. 1. A compound lens comprising:a central lens portion having a first focal length; andat least one peripheral lens portion having a second focal length and surrounding the central lens portion,wherein the first focal length is greater than the second focal length.2. The compound lens of claim 1 , wherein the central lens portion and the at least one peripheral lens portion have concentric focal planes.3. The compound lens of claim 1 , wherein the central lens portion and the at least one peripheral lens portion comprise polymethyl methacrylate (PMMA) claim 1 , glass claim 1 , or optical plastic.4. The compound lens of claim 1 , wherein the central lens portion has a circular shape and the at least one peripheral lens portion has an annular shape.5. The compound lens of claim 1 , wherein the central lens portion and the at least one peripheral lens portion are concentrically arranged.6. The compound lens of claim 1 , wherein the central lens portion and the at least one peripheral lens portion form a Fresnel lens together.7. The compound lens of claim 1 , wherein the central lens portion comprises any one of a convex lens claim 1 , a concave lens claim 1 , a biconvex lens claim 1 , a biconcave lens claim 1 , a positive meniscus lens claim 1 , a negative meniscus lens claim 1 , and a lens having two randomly-curved surfaces.8. The compound lens of claim 1 , wherein the at least one peripheral lens ...

INFRARED LENS SWITCH ASSEMBLIES

An example device can include a circuit assembly, an infrared sensor coupled to the circuit assembly, a switch coupled to the circuit assembly, an infrared lens coupled to a resistive element to alter a state of the switch when the infrared lens alters a position of the resistive element, and a light pipe ring positioned around the infrared lens to allow visible light to pass between an exterior and interior portion of an enclosure. 1. A device , comprising:a circuit assembly;an infrared sensor coupled to the circuit assembly;a switch coupled to the circuit assembly;an infrared lens coupled to a resistive element to alter a state of the switch when the infrared lens alters a position of the resistive element; anda light pipe ring positioned around the infrared lens to allow visible light to pass between an exterior and interior portion of an enclosure.2. The device of claim 1 , wherein the resistive element is positioned between infrared sensor and the light pipe ring.3. The device of claim 1 , wherein the switch is a carbon graphite pill activated when pressure is applied to the resistive element.4. The device of claim 1 , comprising a light source coupled to the circuit assembly to project light through the light pipe ring.5. The device of claim 4 , wherein the resistive element is positioned between the infrared sensor and light source to separate the infrared sensor and the light source.6. The device of claim 1 , comprising an ambient light sensor coupled to the circuit assembly to receive light through the light pipe ring.7. A system claim 1 , comprising:an enclosure;a circuit assembly positioned within the enclosure;a resistive element switch coupled to the circuit assembly;an infrared lens coupled to the resistive element switch such that altering a position of the infrared lens activates or deactivates the resistive element switch;an infrared sensor coupled to the circuit assembly at a location between the circuit assembly and the infrared lens; and allow ...

Infrared sensing device

A meniscus lens has a dome shape and has a first surface facing a lens array and a second surface facing an infrared sensing element. The meniscus lens has a central portion and a peripheral portion. The central portion includes a top point that is an intersection between the optical axis of the meniscus lens and the first surface. The peripheral portion includes an end of the first surface of the meniscus lens. With respect to the central portion of the meniscus lens, an aplanatic point of the first surface is located at the focus of the lens array. With respect to the peripheral portion of the meniscus lens, an aplanatic point of the second surface is located at the focus of the lens array.

FLUORESCENCE IMAGING DEVICE

A fluorescence imaging device includes a microplate that holds a plurality of samples generating fluorescence, a lens assembly, and an imaging unit that collectively images the plurality of samples through the lens assembly. The lens assembly includes a Fresnel lens made of a resin, a second protective plate that protects the surface of the Fresnel lens facing the microplate, a spacer that forms a gap between the Fresnel lens and the protective plate, and a frame by which the Fresnel lens, the second protective plate, and the spacer are sandwiched. 1. A fluorescence imaging device comprising:a microplate that holds a plurality of samples generating fluorescence;a lens assembly that is disposed above the microplate, and includes a Fresnel lens of which at least a side facing the microplate is telecentric and which is made of a resin, a protective plate that protects a surface of the Fresnel lens facing the microplate, a spacer that forms a gap between the Fresnel lens and the protective plate, and a frame by which the Fresnel lens and the protective plate are sandwiched through the spacer; andan imaging unit that collectively images the plurality of samples through the lens assembly using the fluorescence generated by the respective samples.2. The fluorescence imaging device according to claim 1 ,wherein one surface of the Fresnel lens is a flat surface, andthe spacer forms the gap between the flat surface of the Fresnel lens and the protective plate.3. The fluorescence imaging device according to claim 1 ,wherein the spacer is thinner than the Fresnel lens and the protective plate.4. The fluorescence imaging device according to claim 2 ,wherein the spacer is thinner than the Fresnel lens and the protective plate.5. The fluorescence imaging device according to claim 1 ,wherein the spacer is in contact with the Fresnel lens and the protective plate at outer peripheral portions of the Fresnel lens and the protective plate.6. The fluorescence imaging device according to ...

HEAD-MOUNTED ELECTRONIC DEVICE

A head-mounted electronic device according to various embodiments of the present invention may comprise: a curved display; a frame having a mounting surface having a curvature such that the curved display is mounted thereon; and a pair of optical assemblies provided on the left and right sides of the interior of the frame, respectively, so as to provide displayed images to the left and right eyes of the user, the optical assemblies comprising a first lens that forms a view angle of a binocular field of view and a second lens arranged to slope with regard to the first lens, thereby forming an additional view angle of the left or right field of view. In addition, the above head-mounted electronic device may be implemented variously according to embodiments. 1. A head-mounted electronic device comprising:a curved display;a frame having a mounting surface having a curvature such that the curved display is mounted thereon; anda pair of optical assemblies, which are provided on a left side and a right side within the frame, respectively, to provide an image of the curved display to a left eye and a right eye of a user,wherein the pair of optical assemblies comprise a first lens that forms a view angle of a binocular visual field and a second lens arranged to slope with regard to the first lens and form an additional view angle of a left visual field or a right visual field.2. The head-mounted electronic device of claim 1 ,wherein the curved display is provided such that a proximate end and a distal end of the curved display or the entire curved display are curved with a first curvature, andwherein a curved length between the proximate end and the distal end of the curved display is formed to be larger than a viewing angle of the user.3. The head-mounted electronic device of claim 1 , wherein the curved display is formed in a hemispherical shape or semi-elliptical shape.4. The head-mounted electronic device of claim 1 , wherein the curved display is fixedly or removably ...

DIFFRACTIVE OPTICAL ELEMENT

A diffractive optical element is provided that includes a first resin layer having steps on one surface, a second resin layer integrated with the first resin layer in tight contact, and a high refractive index layer disposed between a wall surface of the first resin layer and a wall surface of the second resin layer, wherein the high refractive index layer has a refractive index higher than those of the first resin layer and of the second resin layer, and the high refractive index layer is formed continuously to extend beyond the boundary between the wall surface and the inclined surface adjacent thereto, and to partly overlap the inclined surface. 1. An optical element comprising:a first resin layer having a first surface, the first surface having a plurality of first steps, wherein the plurality of first steps include a plurality of first flat wall surfaces and a plurality of first optically effective surfaces each bounded by the first flat wall surfaces;a second resin layer having a second surface, the second surface having a plurality of second steps, wherein the plurality of second steps include a plurality of second flat wall surfaces and a plurality of second optically effective surfaces each bounded by the second flat wall surfaces, and the plurality of second optically effective surfaces being in direct contact with the plurality of first optically effective surfaces; anda third portion being in contact with the first flat wall surfaces of the first resin layer and the second flat wall surfaces of the second resin layer, wherein the third portion has a refractive index different from that of the first resin layer and the second resin layer,wherein the plurality of first flat wall surfaces includes a first wall surface portion, the plurality of first optically effective surfaces includes a first optically effective surface portion disposed continuously with the first flat wall surface portion and a second optically effective surface portion disposed ...

MULTIFOCAL LENS

The invention relates to a multifocal lens () with a refractive focus (F) and with a diffractive structure () which, in the radial direction (r) of the lens (), plotted across the squared radius (r), has a periodic profile (), wherein the profile () per period has four adjoining portions () which are not differentiable at their connection sites (), wherein a first portion () has a monotonically falling function and the three further portions () have a monotonically rising function or vice versa, and wherein the further portion (), which does not adjoin the first portion (), has a greater pitch than the other further portions (). 1. A multifocal lens with a refractive focal point (F) and a diffractive structure , the structure having a periodic profile in the radial direction (r) of the lens plotted over the squared radius (r) , andthe profile having four mutually adjacent portions per period which cannot be differentiated at their junctions,the four portions including a first portion, a second portion, a third portion and a fourth portion, wherein the first portion is adjacent to the fourth and the second portion, and the third portion is adjacent to the second and fourth portion,wherein the first portion falls monotonically and the second portion, the third portion, and the fourth portion each rise monotonically, or a first portion rises monotonically and the second portion, the third portion, and the fourth portion each fall monotonically, and{'sup': 2', '2, 'wherein the third portion has a steeper gradient than the second portion and the fourth portion, and wherein the period (p) of the profile, plotted over the squared radius, amounts to 0.5 mmto 1 mmand the profile depth (T) to 2 μm to 10 μm.'}2. The multifocal lens according to claim 1 , wherein the first portion claim 1 , the second portion claim 1 , the third portion claim 1 , and the fourth portion each are linear when plotted over the squared radius (r).3. The multifocal lens according to claim 1 , wherein ...

OPTICAL ELEMENT AND OPTOELECTRONIC COMPONENT COMPRISING OPTICAL ELEMENT

An optical element has a first surface and a second surface, wherein a tooth structure having a multiplicity of teeth oriented in a second direction is arranged on the first surface, a stepped lens having a multiplicity of steps oriented in a first direction is arranged on the second surface, and the tooth structure forms a total internal reflection lens. 120.-. (canceled)21. An optical element having a first surface and a second surface , wherein:a tooth structure having a multiplicity of teeth oriented in a second direction is arranged on the first surface, a stepped lens having a multiplicity of steps oriented in a first direction is arranged on the second surface, and the tooth structure forms a total internal reflection lens.22. The optical element as claimed in claim 21 , wherein the first direction and second direction form an angle of 85° to 95°.23. The optical element as claimed in claim 21 , wherein a midpoint of the first surface is covered by the tooth structure.24. The optical element as claimed in claim 21 , wherein the optical element comprises an optically transparent plastic.25. The optical element as claimed in claim 21 , wherein the first surface and the second surface are configured essentially rectangularly.26. The optical element as claimed in claim 21 , wherein the optical element comprises a frame enclosing the first surface and the second surface.27. The optical element as claimed in claim 21 , wherein the optical element shapes a radiation profile of an electromagnetic radiation emerging from a radiation surface having a defined edge length.28. The optical element as claimed in claim 27 , wherein the teeth of the tooth structure have an average tooth height of 5% to 20% of the edge length.29. The optical element as claimed in claim 27 , wherein two teeth of the tooth structure have different tooth heights.30. The optical element as claimed in claim 27 , wherein two neighboring teeth of the tooth structure have a tooth spacing of 5% to 20% ...

HEAD-MOUNTED DISPLAY APPARATUS

A head-mounted display apparatus includes a display unit including a substrate and display elements, and an optical element. The substrate includes a plurality of display portions and a plurality of light-transmitting portions, and the display elements are on the plurality of display portions of the substrate. The optical element is in an optical path of light that is emitted from the display unit and has through-holes that respectively correspond to the plurality of light-transmitting portions. 1. A head-mounted display apparatus comprising:a display unit comprising a substrate and display elements, the substrate comprising a plurality of display portions and a plurality of light-transmitting portions, and the display elements being on the plurality of display portions of the substrate; andan optical element in an optical path of light that is emitted from the display unit and having through-holes that respectively correspond to the plurality of light-transmitting portions.2. The head-mounted display apparatus of claim 1 , wherein the plurality of display portions are spaced from each other claim 1 , and the light-transmitting portions are between respective ones of the plurality of display portions.3. The head-mounted display apparatus of claim 1 , wherein the display elements are non-transmitting elements.4. The head-mounted display apparatus of claim 1 , wherein the optical element is configured to focus light emitted from the display elements onto a preset point.5. The head-mounted display apparatus of claim 1 , wherein the optical element is a Fresnel lens or is a holographic optical element (HOE) having the through-holes.6. The head-mounted display apparatus of claim 1 , wherein the plurality of display portions are a plurality of parallel claim 1 , linear shapes that are spaced from each other.7. The head-mounted display apparatus of claim 1 , further comprising a frame accommodating the display unit and the optical element and configured to be placed on a ...

ROTARY OPTICAL COMMUNICATION JOINT

Systems for communication in a rotary joint. In one example, a communication system includes a stator, a rotor, a plurality of optical receivers circumferentially disposed at a first radius of one of the stator and the rotor, a plurality of optical transmitters circumferentially disposed at a second radius of the other of the stator and the rotor, each optical transmitter of the plurality configured to transmit a data signal to a corresponding optical receiver of the plurality of optical receivers, and a plurality of optical elements, individual optical elements having one of a first size and a second size, wherein individual optical elements are interposed between each optical transmitter of the plurality of optical transmitters and each optical receiver of the plurality of optical receivers and arranged so as to alternate between the first size and the second size along one of the first radius and the second radius. 1. A communication system comprising:a stator;a rotor concentric to the stator;a first plurality of optical receivers circumferentially disposed at a first radius of one of the stator and the rotor;a first plurality of optical transmitters circumferentially disposed at a second radius of the other of the stator and the rotor, each optical transmitter of the first plurality configured to transmit a data signal to a corresponding optical receiver of the first plurality of optical receivers; anda first plurality of optical elements, individual optical elements of the first plurality having one of a first size and a second size, wherein individual optical elements are interposed between each optical transmitter of the first plurality of optical transmitters and each optical receiver of the first plurality of optical receivers and arranged so as to alternate between the first size and the second size along one of the first radius and the second radius.2. The communication system of claim 1 , wherein the rotor is configured to concentrically rotate relative ...

Intraocular lenses having zone-by-zone step height control

A method and system provide an ophthalmic device. The ophthalmic device includes an ophthalmic lens having anterior surface, a posterior surface and at least one diffractive structure including a plurality of zones. The at least one diffractive structure is for at least one of the anterior surface and the posterior surface. Each zone includes at least one echelette having a least one step height. The step height(s) are individually optimized for each zone. To compensate chromatic aberration of eye from distance to a range of vision, a greater than 2π phase step height may be employed and the step height(s) folded by a phase, which is an integer multiple of two multiplied by π. Hence chromatic aberration of eye may be compensated to improve vision from distance to near.

SYSTEMS AND METHODS FOR DETECTING MOTION BASED ON A VIDEO PATTERN

Some systems and methods for detecting motion based on a video pattern can include creating a motion image from a sequence of raw images, masking the motion image with a lens pattern associated with a PIR sensor and an associated Fresnel lens, splitting each of a plurality of blocks of the lens pattern into first and second negative areas, identifying a positive area pixel value as a sum of all pixels in the motion image aligned with the first positive area in the plurality of blocks, identifying a negative area pixel value as a sum of all pixels in the motion image aligned with the second negative area in the plurality of blocks, identifying a motion image response value as a difference between the positive and negative area pixel values, and identifying a presence of motion when the motion image response value exceeds a predetermined value. 1. A method comprising:creating a motion image from a sequence of raw images of a region;masking the motion image with a lens pattern associated with a PIR sensor and an associated Fresnel lens monitoring the region;splitting each of a plurality of blocks of the lens pattern into a first positive area and a second negative area;identifying a positive area pixel value as a sum of all pixels in the motion image that are aligned with the first positive area in the plurality of blocks;identifying a negative area pixel value as a sum of all pixels in the motion image that are aligned with the second negative area in the plurality of blocks;identifying a motion image response value as a difference between the positive area pixel value and the negative area pixel value; andidentifying a presence of motion in the region when the motion image response value exceeds a predetermined value.2. The method of further comprising receiving the sequence of raw images from a video imager monitoring the region.3. The method of further comprising receiving the lens pattern from the PIR sensor.4. The method of further comprising retrieving the lens ...

Holey optical device

A method of making an optical device including forming a plurality of holes with varying radii milled vertically into a film, wherein said holes form a pattern. The radius of each hole determines an effective refractive index for said hole. The effective refractive index modifies a phase and an intensity of an incoming electromagnetic radiation as the radiation propagates through said hole. The device is configured to be operating equally for each linearly polarized radiation simultaneously, wherein the each linearly polarized radiation is normally incident on the device.

CONVERTING SUNLIGHT TO LIQUID FUEL

A system includes a concentrated photovoltaic (CPV) array that includes a plurality of multi-junction solar cell modules, each of which includes a plurality of multi-junction solar cells and solar concentrating optics mounted on a two-axis solar tracker. The system also includes an energy storage system configured to receive electricity produced by the CPV array and configured to convert the electricity into formic acid by electrolysis. 1. A system , comprising:a concentrated photovoltaic, CPV, array, comprising a plurality of multi-junction solar cell modules, each of which comprises a plurality of multi-junction solar cells and solar concentrating optics mounted on a two-axis solar tracker; andan energy storage system configured to receive electricity produced by the CPV array and configured to convert the electricity into formic acid by electrolysis.2. The system of claim 1 , wherein the solar concentrating optics are arranged on top of the plurality of multi-junction solar cells claim 1 , the solar concentrating optics comprising a plate with a plurality of lenses and a convex lens arranged between each of the plurality of lenses and the plurality of multi-junction solar cells.3. The system of claim 2 , wherein each of the plurality of lenses is a Fresnel lens.4. The system of claim 1 , further comprising:a master solar tracker comprising a processor and a wireless communication interface,wherein the two-axis solar tracker of each of the plurality of multi-junction solar cell modules includes a slave solar tracker, each of which comprises a processor and a wireless communication interface.5. The system of claim 4 , wherein the processor of the master solar tracker is configured to determine coordinates of a current position of the sun claim 4 , and the wireless communication interface is configured to send the determined coordinates to each of the slave solar trackers.6. The system of claim 5 , wherein each of the slave solar trackers further comprises:an imager ...

COLOR FILTER, MANUFACTURING METHOD THEREOF, DISPLAY PANEL

A color filter, a manufacturing method thereof and a display panel are provided. The color filter includes a base substrate and a color film layer on the base substrate, and the color film layer includes a lens unit. 1. A color filter , comprising a base substrate and a color film layer on the base substrate , wherein the color film layer comprises a lens unit.2. The color filter according to claim 1 , wherein the lens unit is a Fresnel lens unit.3. The color filter according to claim 2 , wherein the Fresnel lens unit is a phase Fresnel lens.4. The color filter according to claim 2 , further comprising a planarization layer claim 2 , wherein the Fresnel lens unit comprises a flat surface and a step surface;the planarization layer covers the step surface to allow a surface which is on a side, provided with the step surface, of the color filter to be a planarized surface; andthe planarization layer has a refractive index that is smaller than a refractive index of the Fresnel lens unit.5. The color filter according to claim 4 , wherein the Fresnel lens unit is between the planarization layer and the base substrate.6. The color filter according to claim 1 , wherein the color film layer comprises a plurality of pixel units arranged in an array claim 1 , and the Fresnel lens unit comprises one of the plurality of pixel units.7. The color filter according to claim 1 , wherein the color film layer comprises a plurality of pixel units claim 1 , and the Fresnel lens unit comprises a first number of pixel units out of the plurality of pixel units of the color film layer.8. The color filter according to claim 7 , wherein the first number of pixel units of the Fresnel lens unit are in same one direction.9. The color filter according to claim 3 , further comprising a planarization layer claim 3 , wherein the Fresnel lens unit comprises a flat surface and a step surface;the planarization layer covers the step surface to planarize a surface which is on a side, provided with the ...

MULTI-PART OPTICAL SYSTEM FOR LIGHT PROPAGATION IN CONFINED SPACES AND METHOD OF FABRICATION AND USE THEREOF

The present invention is a Substrate guided hologram that allows a wider range of optical devices based on SGHs with improved parameters such as larger NTE displays with a wider field of view, thinner substrates and more compact form factors. The Substrate-Guided Hologram of the subject invention includes a holographic lens which is positioned at an angle to and spaced from a holographic grating, with a mirror located at a diagonal to each of the lens and the grating. 15.-. (canceled)6. An optical system comprising:(a) a light source comprising a light beam;(b) a holographic lens fixed to a first substrate spaced in proximity of the light source at or within the focal distance of the holographic lens;(c) a holographic grating fixed to a second substrate spaced apart from and at an angle to the first substrate;(d) a mirror located at a diagonal to and between the holographic lens and the holographic grating;wherein the light beam travels from the light source through the first substrate to the holographic lens then through the first substrate by total internal reflection to bounce off the mirror into the second substrate to the holographic grating by total internal reflection and then out-coupled for viewing by a user.7. The optical system of therein the first substrate has a different refractive index from the second substrate.8. The optical system of wherein the first substrate has a larger refractive index than the holographic lens.9. The optical system of wherein the second substrate has a smaller index of refraction than the holographic grating.10. The optical system of further comprising a helmet to which the optical system is mounted.11. The optical system of wherein the holographic lens is positioned perpendicularly to the holographic grating.12. The optical system of wherein the holographic lens is positioned at an angle comprising 0° to 360° relative to the holographic grating.13. The optical system of wherein the holographic lens is positioned at an angle ...

COMPACT HIGH FIELD OF VIEW DISPLAY

A wide field of view display device employs curved optical components for enhanced performance with a compact arrangement. A wide field of view display includes a curved display device; a first curved lens having a display side and an exit side, wherein the display side is facing the curved display device; a first plurality of Fresnel facets disposed on the display side of the first curved lens; a second curved lens having a display side and an exit side, wherein the display side is facing the exit side of the first curved lens; and a second plurality of Fresnel facets disposed on the display side of the second curved lens, wherein the first plurality of Fresnel facets is configured to focus light from the curved display device on the second plurality of Fresnel facets, and wherein the second plurality of Fresnel facets is configured to focus light from the first plurality of Fresnel facets on a central image point. 1. A wide field of view display comprising:a curved display device;a first curved lens having a display side and an exit side, wherein the display side is facing the curved display device;a first plurality of Fresnel facets disposed on the display side of the first curved lens;a second curved lens having a display side and an exit side, wherein the display side is facing the exit side of the first curved lens; anda second plurality of Fresnel facets disposed on the display side of the second curved lens, wherein the first plurality of Fresnel facets is configured to focus light from the curved display device on the second plurality of Fresnel facets, and wherein the second plurality of Fresnel facets is configured to focus light from the first plurality of Fresnel facets on a central image point.2. The wide field of view display of claim 1 , wherein the first curved lens and the second curved lens each have a lateral end opposite from a center end claim 1 , wherein each of the lateral ends form a field of view greater than 180°.3. The wide field of view ...

Systems and methods for forming ophthalmic lens including meta optics

Ophthalmic lenses and methods of manufacture thereof are disclosed. The ophthalmic lenses include metasurface features that define a metasurface array on a lens body. The metasurface array can be tuned to modify an optical property, such as glare reduction, of the ophthalmic lens using an arrangement of metasurface building elements dimensioned from an optical wavelength, including being dimensioned smaller than an optical wavelength. The ophthalmic lenses can be subject to physical manipulation, including rolling or other folding during an installation procedure, and as such, the modified optical property induced by the metasurface array can be maintained after such manipulation. The ophthalmic lenses can be formed using a molding process, in which the metasurface array is associated with a non-solid material and formed into a lens shape with the material.

APPARATUS, SYSTEM AND METHOD FOR MITIGATING CONTRAST ARTIFACTS AT AN OVERLAP REGION OF A PROJECTED IMAGE

Techniques and mechanisms to provide for improved image display in an area of overlapping projections. In an embodiment, a multi-layer projection screen comprises light sources and collimation structures each disposed over a corresponding one of such light sources. A first collimation structure disposed over a first light source collimates first light from the first light source. The first collimation structure further receives and redirects second light from a second light source disposed under a second collimation structure that adjoins the first collimation structure. In another embodiment, the first collimation structure redirects the other light from the second light source away from the direction of collimation of the first light. A stray light rejection layer of the multi-layer projection screen passes a majority of the first light for inclusion as part of a projected image, and prevents a majority of the second light from inclusion in the projected image 1. A multi-layer projection screen comprising:a first collimation structure to receive first light from a first light source;a second collimation structure adjoining the first collimation structure at a plane, wherein a first region on a first side of the plane to include the first collimation structure and the first light source, and wherein a second region on a second side of the plane to include the second collimation structure and a second light source, wherein the first collimation structure to receive the first light and second light from the second light source, to collimate the first light in a direction of collimation and to redirect the second light away from the direction of collimation; anda stray light rejection layer optically coupled to receive the first light and the second light via the first collimation structure, to pass a majority of the first light for inclusion as part of a projected image, and to prevent a majority of the second light from inclusion in the projected image.2. The multi- ...

PHASE FILTER, IMAGING OPTICAL SYSTEM, AND IMAGING SYSTEM

A phase filter is configured to comprise an annular structure rotationally symmetrical about an optical axis, each annular zone including a cross-sectional shape of substantially parabola for uniformly extending incident rays of light on a focal plane and letting the rays overlap with each other. 113-. (canceled)14. An optical system comprising:an image forming optical system having a focus position anda phase filter including a plurality of annular zones disposed concentrically around a center of an optical axis of the phase filter,wherein each annular zones of the phase filter diverges incident light flux locally, andwherein a light flux parallel to the optical axis entering the image forming optical system enters each annular zones of the phase filter, and the respective light fluxes which passes through each annular zones of the phase filter passes the focus position of the image forming optical system, andwherein the annular zones cause the respective light fluxes to overlap in a range along the optical axis including the focus position of the image forming optical system.15. The optical system according to claim 14 , wherein a width of each of the annular zones of the phase filter is configured to be uniform among the annular zones.16. The optical system according to claim 14 , wherein a width of each of the annular zones of the phase filter is made narrower in a direction from the optical axis toward a peripheral part of the phase filter.17. The optical system according to claim 14 , wherein a phase difference made by the annular zone is configured to be uniform for the annular zones.18. The optical system according to claim 14 , wherein a phase difference made by the annular zone is configured to be made larger at a peripheral part of the phase filter than at the vicinity of the optical axis.19. The optical system according to claim 14 , wherein each of the annular zones of the phase filter includes a concave surface acting as a concave lens having a ...

Optical magnifying combination lens, head-mounted display optical system and virtual reality display device

An optical magnifying combination lens, head-mounted display optical system and virtual reality display device. The optical magnifying combination lens ( 2 ) is used in a head-mounted virtual reality display device and includes a main lens ( 21 ) and a secondary lens ( 22 ), the main lens ( 21 ) including a central area (A) and an peripheral area (B), wherein the central area (A) comprises a convex lens or a combined convex lens, and the peripheral area (B) is a focusing thin optical element. The secondary lens ( 22 ) is a focusing thin optical element formed with a hollowed-out region. The main lens ( 21 ) and the secondary lens ( 22 ) are stacked together, and the hollowed-out region of the secondary lens ( 22 ) closely fits with a convex portion of the central area (A) of the main lens ( 21 ). The display device using the optical magnifying combination lens ( 2 ) ensures central image quality, and expands a peripheral field of view of a human eye, thus increasing user immersion.

Optical magnifying combination lens, head-mounted optical display system and virtual reality display device

An optical magnifying combination lens, a head-mounted optical display system and a virtual reality display device are provided, wherein the optical magnifying combination lens is for utilization in a head-mounted virtual reality display device, comprising: a central area (A) and a peripheral area (B), wherein the central area (A) is a convex lens or a combination convex lens, and the peripheral area (B) is a focusing thin optical element; the central area (A) corresponds to main visual field imaging, and the peripheral area (B) corresponds to peripheral visual field imaging. The optical magnifying combination lens guarantees center image quality and enlarges edge view of human eyes, so as to enhance user immersion feelings. 118-. (canceled)19: An optical magnifying combination lens for utilization in a head-mounted virtual reality display device , comprising: a central area and a peripheral area , wherein the central area is a convex lens or a combination convex lens , and the peripheral area is a focusing thin optical element which is a focusing optical element with a diameter-thickness ratio of no less than 10; the central area corresponds to main visual field imaging , and the peripheral area corresponds to peripheral visual field imaging.20: The optical magnifying combination lens claim 19 , as recited in claim 19 , wherein the convex lens is a spherical lens or an aspheric lens; and/or the focusing thin optical element is a Fresnel lens claim 19 , a Fresnel zone plate or a binary element.21: The optical magnifying combination lens claim 20 , as recited in claim 20 , wherein the peripheral area is an arc substrate Fresnel lens which is concave towards human eyes.22: The optical magnifying combination lens claim 21 , as recited in claim 21 , wherein a curvature radius of the arc substrate Fresnel lens coincides with a curvature radius of a near-eye side optical surface of the central area.23: The optical magnifying combination lens claim 20 , as recited in claim ...

MEDICAL IMAGING APPARATUS

According to one embodiment, a medical imaging apparatus includes a gantry, a carriage, a screen, a reflector, and a frame. The gantry has a bore formed therein. The bore is formed to accept a subject to be imaged by the medical imaging apparatus. The carriage moves through the bore. The screen is provided on the carriage. An image is projected on the screen by a projector from a rear. The rear is opposite to a side of which a top plate is inserted into the bore. The reflector reflects the image projected on the screen. The reflector includes prisms arranged in a same line. The frame supports the reflector. The frame is provided on the carriage. 1. A medical imaging apparatus comprising:a gantry in which a bore is formed, the bore being formed to accept a subject to be imaged by the medical imaging apparatus;a carriage configured to move through the bore;a screen on which an image is projected by a projector from a rear, the rear being opposite to a side of which a top plate is inserted into the bore, the screen being provided on the carriage;a reflector configured to reflect the image projected on the screen, the reflector including a plurality of prisms arranged in a same line; anda frame configured to support the reflector, the frame being provided on the carriage.2. The medical imaging apparatus according to claim 1 , wherein the line is parallel to a moving direction of the top plate when viewed from a direction along the moving direction.3. The medical imaging apparatus according to claim 1 , wherein each of the prisms extends along a direction that is different from the line claim 1 , and curves in the line of the reflector.4. The medical imaging apparatus according to claim 3 , wherein an extent of curvature to the line differs between each of the prisms.5. The medical imaging apparatus according to claim 1 , wherein in each of the prisms claim 1 , a tilted angle of a prism surface with respect to a horizontal surface is larger than a tilted angle of the ...

RESIN MOLDED ARTICLE PRODUCTION METHOD AND OPTICAL COMPONENT PRODUCTION METHOD

The present invention provides a method for producing a resin molded article through which air bubbles are not easily formed during imprint molding when a curable composition is applied to a mold having a pattern shaped section. The method for producing a resin molded article is a method for producing a resin molded article through imprint molding, the method including: a specific curable composition application process such as the curable composition application process (1) below, in which a curable composition having a contact angle of 50° or less on a mold having a pattern shaped section is applied to a portion of the mold uncoated with the curable composition; and a curing process in which the curable composition applied to the mold is cured to obtain a resin molded article; (1) a curable composition application process including a microparticle application step in which the curable composition is applied such that a particle size of microparticles of the curable composition when adhering to the mold is 0.5 mm or less. 120-. (canceled)21. A method for producing a resin molded article which is a method for producing a resin molded article through imprint molding , the method comprising:one or more curable composition application processes from the following (1) to (4) in which a curable composition having a contact angle of 50° or less on a mold having a pattern shaped section is applied to a portion of the mold uncoated with the curable composition; anda curing process in which the curable composition applied to the mold is cured to obtain a resin molded article;(1) a curable composition application process comprising a microparticle application step in which the curable composition is applied such that a particle size of microparticles of the curable composition when adhering to the mold is 0.5 mm or less;(2) a curable composition application process comprising: a conductive substrate coating step in which a conductive substrate is coated with the curable ...

FOURIER LENS, METHOD FOR DESIGNING FOURIER LENS, AND SCHLIEREN APPARATUS

Provided are a Fourier lens, a method for designing a Fourier lens, and a schlieren apparatus. The Fourier lens includes a substrate and a plurality of cuboid waveguides. The plurality of waveguides are arranged on the substrate in parallel and spaced from each other at a preset interval. The material of the substrate and the material of the waveguides are all transparent to the working waveband of the Fourier lens. The preset interval is smaller than a quotient obtained by dividing a center wavelength of the working waveband by the refractive index of the substrate. The waveguide has a plurality of widths, and the waveguides of different widths correspond to different phase delays. The individual waveguides are arranged on the substrate according to phase delays required at different positions. According to the embodiments, the range of the working angle of the Fourier lens can be increased. 1. A Fourier lens , comprising a substrate and a plurality of cuboid waveguides , wherein the plurality of waveguides are arranged on the substrate in parallel and spaced from each other at a preset interval; a material of the substrate and a material of each of the waveguides are all transparent to a working waveband of the Fourier lens , and the preset interval is smaller than a quotient obtained by dividing a center wavelength of the working waveband by a refractive index of the substrate;the waveguides have a plurality of widths, the waveguides of different widths correspond to different phase delays, and the individual waveguides are arranged on the substrate according to phase delays required at different positions.2. The Fourier lens according to claim 1 , wherein the material of the substrate comprises glass claim 1 , silicon dioxide or silicon nitride.3. The Fourier lens according to claim 1 , wherein the material of the waveguides comprises amorphous silicon claim 1 , germanium claim 1 , titanium dioxide or tellurium.4. The Fourier lens according to claim 1 , wherein ...

LENS, OPTICAL DISPLAY DEVICE AND MANUFACTURING METHOD FOR LENS

A lens, an optical display device including the lens, and a method for manufacturing the lens. The lens includes at least two lens portions; which have different focal lengths. When human eyes view a real scene image through the at least two lens portions separately, the real scene image is imaged at different image distances. The lens includes different lens portions having different focal lens, and thus can be a multi-focus lens. When the lens is used for an optical display device, the human eyes will see virtual image planes at different distances when viewing a display picture through the different lens portions due to the different focal lengths of the different lens portions. Visual fatigue can be reduced, and also scene images at difference distances can be appropriated, so that the three-dimensional feeling is improved. 1. A lens , comprising at least two lens portions having different focal lengths.2. The lens according to claim 1 , whereinthe lens comprises a first surface and a second surface disposed oppositely, wherein the first surface and the second surface are both circular, wherein the first surface is flat, and the second surface comprises a plurality of annular grooves, comprising dentations formed between two adjacent annular grooves of the plurality of annular grooves, andthe dentations formed between the at least two lens portions comprise different structural parameters.3. The lens according to claim 2 , whereinthe plurality of annular grooves is disposed concentrically.4. The lens according to claim 3 , whereinthe structural parameters of the dentations comprise at least one of: spacings between the two adjacent annular grooves, heights of different dentations in a direction perpendicular to the first surface, or angles between side-faces of the dentations and the first surface.5. The lens according to claim 3 , wherein the at least two lens portions comprise a first lens portion and at least one second lens portion claim 3 , whereinthe first ...

VIRTUAL IMAGE DISPLAY DEVICE AND ENLARGEMENT OPTICAL SYSTEM

A virtual image display device includes an image element configured to display an image, a first optical unit disposed at a position where image light is extracted, a second optical unit disposed at the image element side with respect to the first optical unit, a half mirror provided on a serrated surface formed at a bonding portion between the first optical unit and the second optical unit, and a transmission/reflection selection member that is provided at a light emitting side of the first optical unit and that is configured to selectively transmit or reflect light depending on a polarization state of the light. 1. A virtual image display device comprising:an image element configured to display an image;a first optical unit disposed at a position where image light is extracted;a second optical unit disposed at the image element side with respect to the first optical unit;a half mirror provided on a serrated surface formed at a bonding portion between the first optical unit and the second optical unit; anda transmission/reflection selection member that is provided at a light emitting side of the first optical unit and that is configured to selectively transmit or reflect light depending on a polarization state of the light.2. The virtual image display device according to claim 1 , whereinat least one of the first optical unit and the second optical unit includes, as an optical surface at the bonding portion side, a surface having a shape corresponding to a shape of the serrated surface.3. The virtual image display device according to claim 2 , whereinthe first optical unit includes, as an optical surface at the bonding portion side, a surface having a shape corresponding to a shape of the serrated surface, andthe second optical unit includes a flat surface at the bonding portion side.4. The virtual image display device according to claim 1 , whereinat least one of the first optical unit and the second optical unit is a Fresnel lens including the serrated surface.5. ...

Knockdown optical component structure

A knockdown optical component structure is disclosed. According to the light source wattage, size or area, an operator can change the optical lens assembling mode and optical emission effect to modify the light source illumination or arrangement form. The knockdown optical component structure includes a light guide substrate body and at least one light guide body assembled therewith. A connection section is disposed on a circumferential section of the light guide substrate body. A predetermined section of the light guide body is formed with a perforation (or a depression). An assembling section is formed on the perforation or the depression. The connection section is rotatably connected with the assembling section, whereby the light guide substrate body is detachably received in the perforation or the depression of the light guide body to form an optical component assembly.

Lens and lens assembly

Provided are a lens and a lens assembly including a lens barrel defining a receiving space and provided with a light-through hole and the lens received in the receiving space. The lens includes an optical portion for imaging and a peripheral portion provided with through holes penetrating through the peripheral portion along an optical axis of the lens. The through holes are distributed on circumferences of different diameters, centers which are located on the optical axis. The farther the circumference is from the optical axis, the more through holes are arranged on the circumference. When light enters regions of the lens where the through holes are arranged, stray light is absorbed, effectively reducing the reflection of the stray light at the peripheral portion and improving imaging quality. The through holes do not affect assembly accuracy of the lens and reduce appearance yield of the lens or increase cost.

HEAD-MOUNTED DISPLAY DEVICE

A head-mounted display device including a body, a display element, and two lens groups is provided. The display element is disposed on the body and is adapted to provide an image beam. The two lens groups are disposed on a transmission path of the image beam. Each the lens group includes a plurality of lenses, wherein one of the lenses has an astigmatism surface on at least one side of the display element. The astigmatism surface is non-rotationally symmetrical, and the image beam has astigmatic aberration after passing through the astigmatism surface. 1. A head-mounted display device , comprising:a body;a display element, disposed on the body and adapted to provide an image beam; andtwo lens groups, disposed on a transmission path of the image beam, each of the lens groups comprising a plurality of lenses wherein one of the lenses has an astigmatism surface on at least one side of the display element, the astigmatism surface is non-rotationally symmetrical, and the image beam has astigmatic aberration after passing through the astigmatism surface.2. The head-mounted display device according to claim 1 , wherein an imaging focal plane of one portion claim 1 , transmitted through the astigmatism surface claim 1 , of the image beam is different from an imaging focal plane of another portion transmitted through the astigmatism surface.3. The head-mounted display device according to claim 1 , wherein a transversal curvature of the astigmatism surface on a plane parallel to a plane formed by an X direction and a Z direction is different from a transversal curvature on a plane parallel to a plane formed by a Y direction and a Z direction claim 1 , the X direction claim 1 , the Y direction claim 1 , and the Z direction are perpendicular to one another claim 1 , and the image beam is transmitted along a direction parallel to the Z direction.4. The head-mounted display device according to claim 1 , wherein the astigmatism surface is a curved surface.5. The head-mounted ...

A VOLUMETRIC OCCUPANCY COUNTING SYSTEM

A volumetric occupancy counting system that may be applied to a security system of a building management system includes a focal plane array () and a Fresnel lens (). The focal plane array has a plurality of radiant energy sensors () configured to convert radiant energy into an electrical signal. The Fresnel lens has a plurality of lenslets () each including a focal length configured to map one occupant into a pre-determined number of radiant energy sensors of the plurality of radiant energy sensors. 1. A volumetric occupancy counting system comprising:a focal plane array including a plurality of radiant energy sensors configured to convert radiant energy into an electrical signal; anda Fresnel lens having a plurality of lenslets each including a focal length configured to map one occupant into a pre-determined number of radiant energy sensors of the plurality of radiant energy sensors.2. The volumetric occupancy counting system set forth in claim 1 , wherein the pre-determined number of radiant energy sensors is one.3. The volumetric occupancy counting system set forth in claim 1 , wherein each one of the plurality of lenslets has a field of view configured to project upon all of the plurality of radiant energy sensors.4. The volumetric occupancy counting system set forth in claim 2 , wherein each one of the plurality of lenslets has a field of view configured to project upon all of the plurality of radiant energy sensors.5. The volumetric occupancy counting system set forth in claim 1 , wherein each occupant is captured by a single claim 1 , respective claim 1 , lenslet of the plurality of lenslets in any given moment of time.6. The volumetric occupancy counting system set forth in claim 1 , wherein the plurality of lenslets form at least one ring with each lenslet disposed circumferentially adjacent to another lenslet of the plurality of lenslets.7. The volumetric occupancy counting system set forth in claim 6 , wherein the at least one ring comprises a first ...

DISPLAY DEVICE

A display device includes a base, a display panel, a lens member, and a cover. The base includes a bottom plate and a sidewall perpendicularly extending from peripheral edges of the bottom plate. The sidewall includes an inner surface and an opposing outer surface. The display panel is received in the base and attached to the bottom plate. A gap is formed between the display panel and the inner surface. The lens member is attached to the inner surface and covers portions of the bottom plate corresponding to the gap. The lens member includes a bottom surface, an opposing light output surface, a first side surface, and an opposing second side surface. The first and second side surfaces are interconnected between the bottom surface and the light output surface. Striped protrusions are formed on the light output surface. The cover is supported on the base. 1. A display device comprising:a base comprising a bottom plate and a sidewall perpendicularly extending from peripheral edges of the bottom plate, the sidewall comprising an inner surface and an outer surface opposite to the inner surface;a display panel received in the base and attached to the bottom plate, a gap formed between peripheral sides of the display panel and the inner surface;a lens member attaching to the inner surface and covering portions of the bottom plate corresponding to the gap, the lens member comprising a bottom surface, a light output surface opposite to the bottom surface, a first side surface, and a second side surface opposite to the first side surface, the first side surface and the second side surface interconnected between the bottom surface and the light output surface, the first side surface and the second side surface being perpendicular to the bottom surface, a plurality of striped protrusions formed on the light output surface; anda cover supported on the base and comprising a display portion and an extension portion, the display portion positioned above the display panel and aligned ...

OPTICAL SYSTEM FOR AN LED WASH LUMINAIRE

An optical system for an LED wash luminaire employing an lens with a first Fresnel functional surface and a second functional surface comprised of a plurality of out of focus microlenses in bands of different focal lengths in combination with specially shaped reflector(s) to achieve a more even light distribution on a surface area with a wide range of distances from the luminaire. 1. A wash luminaire comprising:light source(s),reflector(s),lens(es) with first Fresnel functional surface and a second functional surface comprising an array of microlenses.2. The wash luminaire of wherein said microlens array includes microlenses with different optical qualities.3. The wash luminaire of where the array is arranged generally into bands of microlenses with common optical qualities.4. The wash luminaire of where the difference in optical qualities relates to the effective focal lengths of the microlenses.5. The wash luminaire of further comprising a diffusing light modulator.6. The wash luminaire of which further comprises a diffusing light modulator positioned to only effects a portion of the light output passing through a single band of common optical qualities.7. The wash luminaire of where the reflector(s) has curved edges to result in a more even appearing light output from a straight edged output lens.8. The wash luminaire of where the cross section of the reflector is generally circular.9. The wash luminaire of where the microlenses are generally have straight edged cross sectional shapes.10. The wash luminaire of where the microlenses are generally square.11. The wash luminaire of where the microlenses are generally hexagonal.12. The wash luminaire of where the microlenses are generally round.13. A wash luminaire comprising:light source(s),reflector(s) with generally circular cross sections and curved edges to result in a more even appearing light output from a straight edged output lens,len(es) with first Fresnel functional surface and a second functional surface ...

LENS, OPTICAL SYSTEM, PROJECTOR, AND IMAGING DEVICE

A lens includes a first surface, a second surface opposed to the first surface, a first outer circumferential part disposed at an outer circumferential side of the first surface, a second outer circumferential part disposed at an outer circumferential side of the second surface, three or more first reference parts provided to the first outer circumferential part, three or more second reference parts provided to the second outer circumferential part, and a first reference surface disposed at an outer circumferential side of the first outer circumferential part and the second outer circumferential part. The first surface and the second surface have a common design axis. A first imaginary plane including the first reference parts and a second imaginary plane including the second reference parts are perpendicular to the design axis respectively. The first reference surface extends in parallel to the design axis.

NANOSTRUCTURED OPTICAL ELEMENT, DEPTH SENSOR, AND ELECTRONIC DEVICE

Provided are a nanostructured optical element, a depth sensor, and an electronic device. The nanostructured optical element includes: a light source in which a plurality of laser sources irradiating light are configured as an array; a meta-pattern layer including a plurality of first nano-posts that are two-dimensionally configured while satisfying a sub-wavelength condition, wherein the plurality of first nano-posts are configured to change the light from the light source into structured light; and a deflecting layer between the light source and the meta-pattern layer, and configured to change a proceeding direction of the light to make the light from the light source be incident to the meta-pattern layer. 1. A nanostructured optical element comprising:a light source in which a plurality of laser sources irradiating light are configured as an array;a meta-pattern layer including a plurality of two-dimensionally configured first nano-posts satisfying a sub-wavelength condition, the plurality of first nano-posts being configured to change the light from the light source into structured light; anda deflecting layer between the light source and the meta-pattern layer, the deflecting layer being configured to change a proceeding direction of the light to make the light from the light source incident to the meta-pattern layer.2. The nanostructured optical element of claim 1 , wherein the laser source is one of a VCSEL laser claim 1 , a Fabry-Perot type laser diode claim 1 , and a distributed feedback (DFB) type laser diode.3. The nanostructured optical element of claim 1 , wherein the deflecting layer comprises a convex lens or a Fresnel lens.4. The nanostructured optical element of claim 1 , wherein the deflecting layer comprises a plurality of two-dimensionally configured second nano-posts satisfying the sub-wavelength condition.5. The nanostructured optical element of claim 4 , further comprising:a supporting layer between the meta-pattern layer and the deflecting ...

PLANAR METALENS AND COVER GLASS INCLUDING THE SAME

The present disclosure provides a planar metalens and a cover glass including the planar metalens. 1. A planar metalens comprising a first lens ,the first lens comprising:a first planar substrate on one side of which a subject is located, anda first metasurface configured on the other side of the first planar substrate.2. The planar metalens of claim 1 ,{'sub': 1', '2', '1', '2, 'wherein a refractive index nof the first lens, and a refractive index nof an air layer present between the first lens and an image plane of the subject have a correlation of n>n.'}3. The planar metalens of claim 1 ,{'sub': 2', '2', '2', '3', '3', '4', '2, 'wherein the first lens includes a material having high refractive index, the material selected from the group consisting of GaP, Si, glass, SiO, TiO, ZnO, AlO, AlN, SiN, Ge, ZrO, SiC, and combinations thereof.'}4. The planar metalens of claim 1 ,wherein the first metasurface comprises a diffraction lattice.5. The planar metalens of claim 1 ,wherein the first metasurface is formed by etching the first planar substrate or by being attached on one side of the first planar substrate.6. The planar metalens of claim 1 ,wherein a wavelength of light transmitting through the planar metalens is in a range of ultraviolet, visible light, infrared, or near-infrared.7. The planar metalens of claim 1 , further comprising a second lens claim 1 ,wherein the second lens comprises:a second planar substrate contacted to the first metasurface on one side thereof, anda second metasurface configured on the other side of the second planar substrate.8. The planar metalens of claim 7 ,{'sub': 1', '2', '3', '1', '2', '3, 'wherein a refractive index nof the first lens, a refractive index nof the second lens, and a refractive index nof an air layer present between the second lens and an image plane of the subject have a correlation of n>n>n.'}9. The planar metalens of claim 7 ,{'sub': 2', '2', '2', '3', '3', '4', '2, 'wherein the first lens includes a material with ...

VIRTUAL REALITY HEAD MOUNTED DISPLAY

Head mounted display device for very large field of view virtual reality experience, adapted to be mounted on a user's head, the head mounted display device including at least on image display, at least two eyepieces associated to each of the user's eyes and arranged between the image display(s) and the location of one of the user's eyes, each eyepiece having at least one Fresnel surface, wherein the at least one Fresnel surface of each eyepiece is planar and is arranged at an angle below 70°, preferably at an angle between 45° and 70°, in particular at an angle between 50° and 67.5° relative to the on-axis field gaze direction and where the surface optical center of the at least one Fresnel surface is decentered relative to the on-axis field gaze direction. 1. A head mounted display device for very large field of view virtual reality experience , adapted to be mounted on a user's head , the head mounted display device comprisingat least one image display,at least two eyepieces associated to each one of the user's eyes and arranged between the image display(s) and the location of one of the user's eyes, each eyepiece comprising at least one optical component and among the optical components one of them comprising at least one Fresnel surface,wherein said at least one Fresnel surface of each eyepiece is flat or nearly flat,wherein said at least one Fresnel surface of each eyepiece is planar and is arranged at an angle below 70°, relative to the on-axis field gaze direction and wherein the surface optical center of said at least one Fresnel surface is decentered relative to the on-axis field gaze direction.2. The head mounted display device as claimed in claim 1 , wherein the at least one Fresnel surface of each eyepiece extends laterally from temporal to nasal sides such as to cover at least 90% of the user's field of view of the corresponding eye.3. The head mounted display device as claimed in claim 1 , wherein the at least one Fresnel surface of each eyepiece ...

DISPLAY DEVICE AND AUTOMOTIVE HEAD-UP DISPLAY SYSTEM WITH ORDINARY WINDSHIELD USING THE SAME

An automotive head-up display system with an ordinary windshield comprises an ordinary windshield and a display device, wherein the distance between the inner surface and the outer surface of the ordinary windshield is equal across the ordinary windshield, and the inner surface and the outer surface are non-processed and free of any optical film. The display device includes an image source and an optical imaging module. Compared with the traditional technologies, the automotive head-up display system with an ordinary windshield of the invention can effectively solve the ghost/double image problem and reduce the assembling and production costs of the automotive head-up display system without using the wedged windshield or any optical film. 1. An automotive head-up display system using an ordinary windshield , comprisingan ordinary windshield joined with an automobile body of an automobile and having an inner surface and an outer surface, wherein a distance between the inner surface and the outer surface is the same across the ordinary windshield, and wherein the inner surface and the outer surface are free of coating and optical film; and an image source disposed inside the automobile body and generating an imaging light; and', 'an optical imaging module disposed at a light-output side of the image source and including at least one concave mirror, wherein the concave mirror reflects the imaging light to the ordinary windshield, and wherein the inner surface and the outer surface of the ordinary windshield reflect the imaging light to a driver to form a first virtual image and a second virtual image, and wherein a distance between the driver and the first virtual image is greater than or equal to a virtual image distance, and wherein a ratio of a ghost image determined by the first virtual image and the second virtual image is less than or equal to 0.5%., 'a display device including'}2. The automotive head-up display system using an ordinary windshield according to ...

MICROSCOPE APPARATUS

A microscope apparatus includes an objective and a photodetector, and projects a pupil of the objective onto a light-receiving surface of the photodetector. The microscope apparatus further includes an optical element that is arranged between the objective and the photodetector. The optical element has a plurality of refractive surfaces which are arranged in a direction orthogonal to an optical axis of the optical element and to which light fluxes emitted from the pupil of the objective at different angles are incident. 1. A microscope apparatus that projects a pupil of an objective onto a light-receiving surface of a photodetector , the apparatus comprising:the objective;the photodetector; andan optical element that is arranged between the objective and the photodetector, and that has a plurality of refractive surfaces which are arranged in a direction orthogonal to an optical axis of the optical element and to which light fluxes emitted from the pupil of the objective at different angles are incident, whereina refractive surface that is closer to the optical axis from among the plurality of refractive surfaces takes the shape of a linear line that forms a larger angle with the optical axis on a cross-section along the optical axis, anda refractive surface on the optical axis from among the plurality of refractive surfaces is orthogonal to the optical axis.2. The microscope apparatus according to claim 1 , whereinthe plurality of refractive surfaces are formed with a specified pitch in the direction orthogonal to the optical axis, andthe specified pitch is equal to or larger than a diameter of a light flux when the light flux emitted from the pupil of the objective as a parallel light flux is incident to the optical element.3. The microscope apparatus according to claim 2 , whereinthe specified pitch is a diameter of a light flux when the light flux emitted from the pupil of the objective as a parallel light flux is incident to the optical element.4. The microscope ...

Optical assembly and method of manufacturing an optical assembly

An optical assembly for an optical sensor device has a lens plate, a light source, and a light receiving unit. The lens plate includes a lens structure on a side associated with the light source and a light extraction structure on a side facing away from the light source. The lens structure has different local radii of curvature.

OPTICAL LENS, GLASSES AND DISPLAY DEVICE

The present disclosure provides an optical lens, glasses and a display device. The optical lens includes: a first surface, a second surface, a first lens portion and a second lens portion. The optical lens is a convex lens. The first surface and the second surface are at two side surfaces of the optical lens. The first surface is a convex aspheric surface, and the second surface is a Fresnel surface with a recessed curved base. The first lens portion and the second lens portion are adjacent each other and connected in a direction perpendicular to a main optical axis of the optical lens. A first focal point of the first lens portion and a second focal point of the second lens portion are on the main optical axis, and a focal length of the second lens portion is greater than a focal length of the first lens portion. 112-. (canceled)13. An optical lens comprising:a first surface;a second surface;a first lens portion; anda second lens portion;wherein the optical lens is a convex lens;the first surface and the second surface are at two side surfaces of the optical lens, the first surface is an aspheric surface that is convex in a direction away from the second surface, and the second surface is a Fresnel surface with a curved base that is recessed in a direction toward the first surface;the first lens portion and the second lens portion are adjacent each other and connected in a direction perpendicular to a main optical axis of the optical lens;a first focal point of the first lens portion and a second focal point of the second lens portion are on the main optical axis, and a focal length of the second lens portion is different from a focal length of the first lens portion.14. The optical lens of claim 13 , wherein the focal length of the second lens portion is greater than the focal length of the first lens portion.15. The optical lens of claim 14 , wherein the focal length of the first lens portion is in a range of from 35 mm to 50 mm claim 14 , and the focal length of ...

VIRTUAL IMAGE DISPLAY DEVICE

A virtual image display device includes a projection optical system that projects an image display light toward a virtual image presentation plate. The projection optical system includes a first concave mirror that reflects the image display light toward the virtual image presentation plate and a second concave mirror that reflects the image display light toward the first concave mirror. Defining a reference plane along both a direction of incidence and a direction of output of the image display light on the virtual image presentation, the first concave mirror is oriented such that the image display light is incident on the first concave mirror in a direction along the reference plane, and the second concave mirror is oriented such that the image display light is incident on the second concave mirror in a direction intersecting the reference plane. 1. A virtual image display device for presenting a virtual image to a user via a virtual image presentation plate , comprising:a display unit that generates an image display light; anda projection optical system that projects the image display light toward the virtual image presentation plate, whereinthe projection optical system includes a first concave mirror that reflects the image display light toward the virtual image presentation plate and a second concave mirror that reflects the image display light toward the first concave mirror,defining a plane along both a direction of incidence and a direction of output of the image display light on the virtual image presentation plate as a reference plane, the first concave mirror is oriented such that the image display light is incident on the first concave mirror in a direction along the reference plane, and the second concave mirror is oriented such that the image display light is incident on the second concave mirror in a direction intersecting the reference plane, andthe display unit is provided at a focal point of a composite optical system within a meridional plane, ...

VIRTUAL IMAGE DISPLAY DEVICE

A virtual image display device includes: a display unit that generates an image display light; and a projection optical system that projects the image display light L toward the virtual image presentation plate. The projection optical system includes a projection mirror that projects the image display light toward the virtual image presentation plate and an optical device of transmission type provided such that a light axis intersects at an angle to a light path of the projection optical system. The display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system. 1. A virtual image display device for presenting a virtual image to a user via a virtual image presentation plate , comprising:a display unit that generates an image display light; anda projection optical system that projects the image display light toward the virtual image presentation plate, whereinthe projection optical system includes a projection mirror that projects the image display light toward the virtual image presentation plate and an optical device of transmission type provided such that a light axis of the optical device intersects at an angle to a light path of the projection optical system,the display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system, andthe focal point of the composite optical system within the meridional plane is a position of convergence of parallel beams assumed to be incident from the user toward the virtual image presentation plate along the meridional plane of the virtual image presentation plate.2. The virtual image display device according to claim 1 , further comprising:a housing that houses the display unit inside and includes an output port through which the ...

VIRTUAL IMAGE DISPLAY DEVICE

A virtual image display device includes a projection optical system that includes a projection mirror that projects an image display light toward a virtual image presentation plate. The projection mirror has a concavely curved surface and is arranged such that a curvature in a second cross section intersecting the concavely curved surface is larger than a curvature in a first cross section intersecting the concavely curved surface. The second cross section is orthogonal to the first cross section. The display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system. 1. A virtual image display device for presenting a virtual image to a user via a virtual image presentation plate , comprising:a display unit that generates an image display light; anda projection optical system that includes a projection mirror that projects the image display light toward the virtual image presentation plate, whereinthe projection mirror has a concavely curved surface on which the image display light is incident and reflected diagonally and is arranged such that a curvature in a second cross section intersecting the concavely curved surface is larger than a curvature in a first cross section intersecting the concavely curved surface, the first cross section is a plane that includes both the direction of incidence and the direction of reflection of the image display light incident on the concavely curved surface diagonally, and the second cross section is a plane orthogonal to the first cross section and is a plane along a direction orthogonal to both the direction of incidence and the direction of reflection of the image display light incident on the concavely curved surface diagonally,the display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the ...