08-02-2018 дата публикации
Номер: US20180037492A1
A near-infrared cut filter glass includes: P, Al, R (R represents any one or more of Li, Na, and K), R′ (R′ represents any one or more of Mg, Ca, Sr, Ba, and Zn), and Cu, and not including F practically, wherein (Cu amount/total Cu amount)×100[%] is 0.01 to 7.0%. The filter glass may further include, by mol %, 0 to 10% BO. The filter glass may have a fracture toughness value of the near-infrared cut filter glass is 0.3 MPa·mor more. For the filter glass, a quotient obtained by dividing an absorption constant at a wavelength of 430 nm by an absorption constant at a wavelength of 800 nm, of the near-infrared cut filter glass, may be 0.00001 to 0.19. 1. A near-infrared cut filter glass including: P , Al , R , R′ , and Cu , and not including F practically , whereinR represents any one or more of Li, Na, and K;R′ represents any one or more of Mg, Ca, Sr, Ba, and Zn; and{'sup': '+', '(Cu amount/total Cu amount)×100[%] is 0.01 to 7.0%.'}2. The near-infrared cut filter glass according to claim 1 , further including claim 1 , by mol % claim 1 , 0 to 10% BO.3. The near-infrared cut filter glass according to claim 1 , wherein a fracture toughness value of the near-infrared cut filter glass is 0.3 MPa·mor more.4. The near-infrared cut filter glass according to claim 1 , wherein a quotient obtained by dividing an absorption constant at a wavelength of 430 nm by an absorption constant at a wavelength of 800 nm claim 1 , of the near-infrared cut filter glass claim 1 , is 0.00001 to 0.19.5. The near-infrared cut filter glass according to claim 1 , wherein a transmittance at a wavelength of 430 nm at a thickness of 0.3 mm of the near-infrared cut filter glass is 50 to 92%.6. The near-infrared cut filter glass according to claim 1 , including claim 1 , by mol %:{'sub': 2', '5, '50 to 75% PO;'}{'sub': 2', '3, '5 to 22% AlO;'}{'sub': '2', '0.5 to 20% RO;'}0.1 to 25% R′O; and0.1 to 15% CuO, wherein{'sub': 2', '2', '2', '2, 'RO represents any one or more of LiO, NaO, and KO; and'}R′ ...
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