Near-infrared light-absorbing glass, near-infrared light-absorbing element, near-infrared light-absorbing filter, and method of manufacturing near-infrared light-absorbing formed glass article, and copper-containing glass
First Claim
1. Near-infrared light-absorbing glass comprising, denoted as cationic percentages, 23 to 41 percent of P5+, 4 to 16 percent of Al3+, 11 to 40 percent of Li+, 3 to 13 percent of Na+, 12 to 53 percent of R2+ (where R2+ denotes the total of Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+), 0 to 6 percent of Zn2+ and 2.6 to 4.7 percent of Cu2+, and F−
- and O2−
as anionic components;
wherein the glass is fluorophosphates glass essentially comprising no arsenic and no lead.
1 Assignment
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Accused Products
Abstract
Provided are near-infrared light-absorbing glass in which good color compensating characteristics are maintained even without containing harmful arsenic, permitting the thinning of the glass, and having good weatherability and forming properties; a near-infrared light-absorbing element comprised of such glass; a near-infrared light-absorbing filter employing such glass. Also provided, at low cost, are near-infrared light-absorbing glass permitting good color compensating, a near-infrared light-absorbing element comprised of such glass, and a near-infrared light-absorbing filter comprising such elements. The glass comprises cationic components with a certain composition as well as F− and O2− as anionic components. Alternatively, the glass is near-infrared light-absorbing glass, wherein the glass exhibits properties, based on a thickness of 0.5 mm, in the spectral transmittance of wavelengths of 400 to 700 nm, that wavelength, at which a 50 percent transmittance is exhibited, is less than 630 nm, transmittance at a wavelength longer than said wavelength is less than 50 percent, transmittance at a wavelength shorter than said wavelength is higher than 50 percent and the viscosity at a liquid phase temperature is 0.5 Pa·s or more. The near-infrared light-absorbing element is comprised of such glass. The near-infrared light-absorbing filter comprises a glass plate comprised of such glass. Alternatively, the glass is comprised of fluorophosphate glass or phosphate glass, and comprises 0.1 weight percent or more of copper based on CuO, 0.005 to 0.5 weight percent of iron based on Fe2O3, 0.01 to 1 weight percent of antimony based on Sb2O3, and no arsenic.
44 Citations
36 Claims
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1. Near-infrared light-absorbing glass comprising, denoted as cationic percentages, 23 to 41 percent of P5+, 4 to 16 percent of Al3+, 11 to 40 percent of Li+, 3 to 13 percent of Na+, 12 to 53 percent of R2+ (where R2+ denotes the total of Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+), 0 to 6 percent of Zn2+ and 2.6 to 4.7 percent of Cu2+, and F−
- and O2−
as anionic components;wherein the glass is fluorophosphates glass essentially comprising no arsenic and no lead. - View Dependent Claims (2, 3, 4, 5, 6)
- and O2−
-
7. Near-infrared light-absorbing glass wherein,
a thickness of the glass, at which the glass exhibits a property that wavelength at which a 50 percent transmittance is exhibited is 615 nm, is in a range of from 0.1 to 0.8 mm, a transmittance at a wavelength of 400 nm is 80 percent or more at the thickness at which the glass exhibits said property, a transmittance at a wavelength of 800 to 1000 nm is less than 5 percent, a the thickness at which the glass exhibits said property, a transmittance at a wavelength of 1200 nm is less than 20 percent at the thickness at which the glass exhibits said property, and the glass is fluorophosphates glass essentially comprising no arsenic and no lead and having a content of Zn2+ equal to or less than 6 cation percent.
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12. Near-infrared light-absorbing glass, wherein the glass exhibits properties, based on a thickness of 0.5 mm,
that a first wavelength, at which a 50 percent transmittance is exhibited, is shorter than 630 nm, transmittance at a second wavelength of said first wavelength to 700 nm is less than 50 percent, transmittance at a third wavelength of 400 nm to said first wavelength is higher than 50 percent, the viscosity at a liquid phase temperature is 0.5 Pa· - multidot·
s or more, andthe glass is copper-containing fluorophosphates glass essentially comprising no arsenic and no lead and having a content of Zn2+ equal to or less than 6 cation percent. - View Dependent Claims (13, 14, 15)
- multidot·
- 16. Copper-containing glass comprised of fluorophosphate glass or phosphate glass comprising 0.1 weight percent or more of copper based on CuO, 0.005 to 0.5 weight percent of iron based on Fe2O3, 0.01 to 1 weight percent of antimony based on Sb2O3, and no arsenic.
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22. Near-infrared light-absorbing glass comprising, denoted as cationic percentages, 23 to 41 percent of P5+, 4 to 16 percent of Al3+, 11 to 40 percent of Li+, 3 to 13 percent of Na+, 12 to 53 percent of R2+ (where R2+ denotes the total of Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+), and 2.6 to 4.7 percent of Cu2+, and F−
- and O2−
as anionic components;wherein the glass is fluorophosphates glass essentially comprising no arsenic and no lead, and denoted as having an anionic percentage of 25 to 48 percent of F. - View Dependent Claims (23, 24, 25, 26, 27)
- and O2−
-
28. Near-infrared light-absorbing glass wherein,
a thickness of the glass, at which the glass exhibits a property that wavelength at which a 50 percent transmittance is exhibited is 615 nm, is in a range of from 0.1 to 0.8 mm, a transmittance at a wavelength of 400 nm is 80 percent or more at the thickness at which the glass exhibits said property, a transmittance at a wavelength of 800 to 1000 nm is less than 5 percent, a the thickness at which the glass exhibits said property, a transmittance at a wavelength of 1200 nm is less than 20 percent at the thickness at which the glass exhibits said property, and the glass is fluorophosphates glass essentially comprising no arsenic and no lead, and denoted as having an anionic percentage of 25 to 48 percent of F.
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33. Near-infrared light-absorbing glass, wherein the glass exhibits properties, based on a thickness of 0.5 mm,
that a first wavelength, at which a 50 percent transmittance is exhibited, is shorter than 630 nm, transmittance at a second wavelength of said first wavelength to 700 nm is less than 50 percent, transmittance at a third wavelength of 400 nm to said first wavelength is higher than 50 percent, the viscosity at a liquid phase temperature is 0.5 Pa· - multidot·
s or more, andthe glass is copper-containing fluorophosphates glass essentially comprising no arsenic and no lead, and denoted as having an anionic percentage of 25 to 48 percent of F. - View Dependent Claims (34, 35, 36)
- multidot·
Specification