Holmium-based contrast enhancing UV blocking glass compositions

Patent metadata

Field	Value
Publication number	US-10336647-B2
Application number	US-201715840758-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	Dec 16, 2016
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

A UV-blocking glass material having precipitated cuprous halide crystals and including by weight percent, on an oxide basis: from 30 wt % to 65 wt % SiO 2 ; from 12 wt % to 25 wt % B 2 O 3 ; from 3 wt % to 10 wt % Al 2 O 3 ; from 0 wt % to 7 wt % Na 2 O; from 0 wt % to 10 wt % K 2 O; from 0 wt % to 5 wt % Li 2 O; from 0.5 wt % to 10 wt % Ho 2 O 3 ; from 0.25 wt % to 1.50 wt % CuO; and from 0.5 wt % to 5.0 wt % halogens.

First claim

What is claimed is:

1. A UV-blocking glass material comprising precipitated cuprous halide crystals and comprising by weight percent, on an oxide basis:
from greater than or equal to 30 wt % to less than or equal to 65 wt % SiO 2 ;
from greater than or equal to 12 wt % to less than or equal to 25 wt % B 2 O 3 ;
from greater than or equal to 3 wt % to less than or equal to 10 wt % Al 2 O 3 ;
from greater than or equal to 0 wt % to less than or equal to 7 wt % Na 2 O;
from greater than or equal to 0 wt % to less than or equal to 10 wt % K 2 O;
from greater than or equal to 0 wt % to less than or equal to 5 wt % Li 2 O;
from greater than or equal to 0.5 wt % to less than or equal to 10 wt % Ho 2 O 3 ;
from greater than or equal to 0.25 wt % to less than or equal to 1.50 wt % CuO; and
from greater than or equal to 0.5 wt % to less than or equal to 5.0 wt % halogens.

2. The UV-blocking glass material according to claim 1 , wherein the UV-blocking glass material comprises from greater than or equal to 5 wt % to less than or equal to 20 wt % R 2 O, where R 2 O is alkali metal oxides.

3. The UV-blocking glass material according to claim 1 , further comprising from greater than or equal to 0 wt % to less than or equal to 10 wt % RO, wherein RO is alkaline earth metal oxides.

4. The UV-blocking glass material according to claim 1 , further comprising from greater than or equal to 0 wt % to less than or equal to 10 wt % of a member of the group consisting of ZnO, La 2 O 3 , Ta 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Nb 2 O 5 , WO 3 , MO 3 , and combinations thereof.

5. The UV-blocking glass material according to claim 1 , further comprising from greater than or equal to 0 wt % to less than or equal to 10 wt % of a member selected from the group consisting of CeO 2 , TiO 2 , ZrO 2 , and combinations thereof.

6. The UV-blocking glass material according to claim 1 , further comprising from greater than or equal to 0.0 wt % to less than or equal to 10.0 wt % coloring agents.

7. The UV-blocking glass material according to claim 6 , wherein the coloring agents are selected from the group consisting of Nd 2 O 3 , Er 2 O 3 , Pr 2 O 3 , Fe 2 O 3 , NiO, CoO, V 2 O 5 , Cr 2 O 3 , and combinations thereof.

8. The UV-blocking glass material according to claim 1 , further comprising a color filtering agent selected from the group consisting of Nd 2 O 3 , Er 2 O 3 , Pr 2 O 3 , and combinations thereof in an amount from greater than or equal to 0.0 wt % to less than or equal to 25 wt %.

9. The UV-blocking glass material according to claim 1 , wherein the UV-blocking glass material comprises a ratio of reducing agent (RA) to CuO that satisfies the following:
0.025≤RA/CuO≤1.500.

10. The UV-blocking glass material according to claim 9 , wherein the reducing agent is SnO.

11. The UV-blocking glass material according to claim 1 , wherein a transmission of the UV-blocking glass material when measured on a 1 mm thick sample is essentially about 0.0% at wavelengths less than or equal to 400 nm.

12. The UV-blocking glass material according to claim 1 , wherein a transmission of the UV-blocking glass material when measured on a 1 mm thick sample is less than or equal to 1% at a wavelength less than or equal to 415 nm.

13. The UV-blocking glass material according to claim 1 , wherein a transmission of the UV-blocking glass material at a wavelength of 450 nm satisfies:
T (450 nm) ≤0.75 T v ,

wherein T (450 nm) is a transmission measured at a wavelength of about 450 nm, and T v is a transmission within a visible range measured according to ANSI Z80.3 (2001).

14. An article comprising a UV-blocking glass material comprising precipitated cuprous halide crystals and comprising by weight percent, on an oxide basis:
from greater than or equal to 30 wt % to less than or equal to 65 wt % SiO 2 ;
from greater than or equal to 12 wt % to less than or equal to 25 wt % B 2 O 3 ;
from greater than or equal to 3 wt % to less than or equal to 10 wt % Al 2 O 3 ;
from greater than or equal to 0 wt % to less than or equal to 7 wt % Na 2 O;
from greater than or equal to 0 wt % to less than or equal to 10 wt % K 2 O;
from greater than or equal to 0 wt % to less than or equal to 5 wt % Li 2 O;
from greater than or equal to 1 wt % to less than or equal to 4 wt % Ho 2 O 3 ;
from greater than or equal to 0.25 wt % to less than or equal to 1.50 wt % CuO; and
from greater than or equal to 0.5 wt % to less than or equal to 5.0 wt % halogens.

15. The article according to claim 14 , wherein the article is a lens for an eyewear product.

16. The article according to claim 14 , wherein the article has a single layer structure.

17. The article according to claim 14 , wherein the article is a light filter within an information display device.

18. The article according to claim 14 , wherein the article is a refractive lens element in an optical element.

19. The article according to claim 14 , wherein a transmission of the UV-blocking glass material at a wavelength of 450 nm satisfies:
T (450 nm) ≤0.75 T v ,

wherein T (450 nm) is a transmission measured at a wavelength of about 450 nm, and T v is a transmission within a visible range measured according to ANSI Z80.3 (2001).

Assignees

• Corning Inc

Inventors

• Brocheton Yves Andre Henri

Classifications

• G02C7/10

  Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses · CPC title

• C03C3/11 Primary

  containing halogen or nitrogen · CPC title

• C03B25/02

  in a discontinuous way · CPC title

• C03C4/085

  for ultraviolet absorbing glass · CPC title

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title