Double-field-of-view stereoimaging optical system based on integrated shared primary mirror

The invention provides a double-field-of-view stereoimaging optical system based on an integrated shared primary mirror, which consists of a two three-reflector abaxial optical systems and comprises a welding primary mirror, two secondary mirrors, three third mirrors, two plane deflection mirrors and two receiving surfaces. Through using two beams of symmetrical deviated field-of-view incident light rays, stereopairs are formed through the optical systems, and the invention can be used for realizing the spatial stereometric mapping with large base-height ratio and high precision. The system of the invention welds the two main mirrors of the two optical systems at a certain angle for realizing the integration of the optical systems, and the stability of the included angle between the frontfield of view and the back field of view is ensured, so the stability of the base-height (B/H) ratio is ensured, in addition, the welding angle can be changed, and the required base-height (B/H) ratio can ...

Device-level automatic testing platform and testing method for SRAM type FPGA

The invention relates to a device-level automatic testing platform and testing method for an SRAM type FPGA, in particular to a device-level automatic testing platform and testing method for Vertix-4 series SRAM type FPGA. The device-level automatic testing platform for the FPGA is characterized by comprising a server, a programmer, a tester host and a test interface board; the test interface board comprises the tested FPGA and an auxiliary hardware configuration circuit; the server and programmer exchange data through a USB, the server is connected with the tester host through a local bus to exchange data, the programmer configures the program of the tested FPGA through the JTAG interface of the tested FPGA, the tester host provides power supply for the tested FPGA and measures the working current thereof, testing excitation signals are exerted to the tested FPGA through a digital channel, and the test result is sampled through the digital channel.

Large diameter expansible primary lens precision locking apparatus for spatial observation optical remote sensor

Double-visual field off-axis three-mirror integrated type optical system for sharing primary and secondary lens

The invention relates to a binocular visual field off-axis three-mirror integrated optical system which shares a primary mirror and a secondary mirror. The optical system comprises the primary mirror,the secondary mirror, two pieces of third reflecting mirrors, two pieces of plane replication reflecting mirrors and two receiving image surfaces; the centers of the primary mirror and the secondarymirror share the same axis which is taken as a main optical axis of the optical system; the ray of the visual field is reflected by the primary mirror and the secondary mirror and then separated intotwo paths; the two paths of ray respectively reach the two pieces of third reflecting mirrors and then are reflected by the two plane replication reflecting mirrors to the two receiving image surfaces. The system of the invention is characterized by large vision field, high machine height ratio, wide coverage, being used for stereoscopic plotting, etc.

Method for determining ultralow orbit flight satellite orbit under power constraint

The invention discloses a method for determining an ultralow orbit flight satellite orbit under power constraint. The method comprises the steps that firstly, satellite mass and satellite power under a given orbit height are combined with mass and power of a satellite model respectively, so that a fixed numerical value portion and a fixed slope portion are obtained; a mass recurrence mode and a power recurrence mode are adopted, so that satellite mass and power under the number of times of recurrence are calculated; finally, whether the mass convergence condition and the power convergence condition are satisfied or not is judged, and when the conditions are satisfied, total mass of satellites on the given orbit height is assigned to accumulated mass. According to the method for determining the ultralow orbit flight satellite orbit under the power constraint, mass distribution of the satellites is analyzed through the method that the orbit heights to be determined are traversed, so that ...

Method for distributing and transferring multiple satellites launched by one rocket to different orbit planes

The invention discloses a method for distributing and transferring multiple satellites launched by one rocket to different orbit planes. Firstly, orbit injection dip angles i, target heights Hf, time T for completing deployment of tasks and orbit plane drifting distances delta omega needed by all the satellites need to be determined, and critical height differences delta a for transferring the satellites to the target obit planes in the assigned time T are calculated according to the input conditions. Satellite drifting starting heights are provided through a piggybacking separation mode or an upper-level orbital transferring mode, or when the quantity of fuel carried by the satellites enables corresponding orbit transferring capability to be achieved, drifting is begun by directly transferring to the drifting starting heights from the orbit injection height. The different drifting starting heights corresponding to all the satellite are set under the premise that the satellites can arrive ...

Method for prolonging shelf life of sauced meat product

The present invention relates to a method for prolonging a shelf life of a sauced meat product, and belongs to the technical field of microbiology. The present invention provides a method for prolonging the shelf life on the basis of maintaining of the original flavor of the sauced meat product. According to the method, a fresh sauced meat product is filled into a polypropylene package bag, sealing is performed under a vacuum degree of a pressure of 1.33-13.30 Kpa through a vacuum sealing machine, and a 3 kw, 60 DEG C, 5 min and 4.5 cm microwave treatment is performed, wherein the shelf life of the sauced meat product is 12 days. According to the present invention, the method is simple and practical, the shelf life is long, the method is completely suitable for the specialized production, the produced fresh sauced meat product maintains the original color, the original flavor and the original nutrients, and has the improved safety, and characteristics of high efficiency, energy saving and ...

Optical system for stereo mapping with low base-height ratio

The invention provides an optical system for stereo mapping with a low base-height ratio, which is used in a bias-field, adopts a coaxial tri-mirror system in which a primary mirror, a secondary mirror, a tertiary mirror and a reflecting plane mirror are completely shared, and is formed by combining two independent optical imaging paths. Two groups of incident light rays each of which has an included angle of 1 to 6 degrees sequentially reach the primary mirror, the secondary mirror and the tertiary mirror; and finally, the incident light rays are respectively reflected to two independent receiving image planes for imaging by the reflecting plane mirror. By using the bifocal surface as well as the primary mirror, the secondary mirror, the tertiary mirror and the reflecting plane mirror which are simultaneously shared, the invention is capable of simultaneously imaging in front and rear fields of view, therefore, the stereoscopic mapping with a low base-height ratio and high precision can ...

Spatial observation optical remote sensing equipment very large diameter expansible primary mirror precision locking apparatus

The invention discloses a precise locking device for a super-large caliber expandable primary mirror of an optical sensor for space observation, comprising a positioning device and a locking device, wherein the positioning device comprises a set of positioning blocks confining three free degrees, a set of positioning blocks confining two free degrees and a set of positioning blocks confining one free degree; each set of positioning block a positioning block fixed on a bracing structure of a middle mirror of the primary mirror and a sub-positioning block fixed on a bracing structure of a block mirror of the primary mirror. The locking device comprises a fixed spring nut, a front foundation, a spring, a locking nut, a rear foundation, a push bearing, a locking bolt, a decelerator and a stepper motor. The locking device of the precise locking device carries out positioning and locking separately so as to de-skill the processing and controlling difficulty, improves the precision of positioning ...

Double-visual field off-axis three-mirror integrated type optical system for sharing primary and secondary lens

The invention relates to a binocular visual field off-axis three-mirror integrated optical system which shares a primary mirror and a secondary mirror. The optical system comprises the primary mirror, the secondary mirror, two pieces of third reflecting mirrors, two pieces of plane replication reflecting mirrors and two receiving image surfaces; the centers of the primary mirror and the secondary mirror share the same axis which is taken as a main optical axis of the optical system; the ray of the visual field is reflected by the primary mirror and the secondary mirror and then separated into two paths; the two paths of ray respectively reach the two pieces of third reflecting mirrors and then are reflected by the two plane replication reflecting mirrors to the two receiving image surfaces. The system of the invention is characterized by large vision field, high machine height ratio, wide coverage, being used for stereoscopic plotting, etc.

Double-field-of-view stereoimaging optical system based on integrated shared primary mirror

The invention provides a double-field-of-view stereoimaging optical system based on an integrated shared primary mirror, which consists of a two three-reflector abaxial optical systems and comprises a welding primary mirror, two secondary mirrors, three third mirrors, two plane deflection mirrors and two receiving surfaces. Through using two beams of symmetrical deviated field-of-view incident light rays, stereopairs are formed through the optical systems, and the invention can be used for realizing the spatial stereometric mapping with large base-height ratio and high precision. The system of the invention welds the two main mirrors of the two optical systems at a certain angle for realizing the integration of the optical systems, and the stability of the included angle between the front field of view and the back field of view is ensured, so the stability of the base-height (B/H) ratio is ensured, in addition, the welding angle can be changed, and the required base-height (B/H) ratio ...

Optical system for stereo mapping with low base-height ratio

The invention provides an optical system for stereo mapping with a low base-height ratio, which is used in a bias-field, adopts a coaxial tri-mirror system in which a primary mirror, a secondary mirror, a tertiary mirror and a reflecting plane mirror are completely shared, and is formed by combining two independent optical imaging paths. Two groups of incident light rays each of which has an included angle of 1 to 6 degrees sequentially reach the primary mirror, the secondary mirror and the tertiary mirror; and finally, the incident light rays are respectively reflected to two independent receiving image planes for imaging by the reflecting plane mirror. By using the bifocal surface as well as the primary mirror, the secondary mirror, the tertiary mirror and the reflecting plane mirror which are simultaneously shared, the invention is capable of simultaneously imaging in front and rear fields of view, therefore, the stereoscopic mapping with a low base-height ratio and high precision can ...