# US 10,865,134 B2 · Glass

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,865,134 B2
- Document ID: US10865134B2
- Status: Granted
- Kind: B2
- Application number: 15/995,379
- Filed: 2018-06-01
- Published: 2018-10-18
- Granted: 2020-12-15
- Earliest claimed: 2015-12-02
- Assignees: AGC Inc.; Tsubota Laboratory, Inc.
- Applicants: AGC Inc.; Tsubota Laboratory, Inc.
- Inventors: Kensuke Nagai; Tetsuya Nakashima; Yutaka Kuroiwa; Hiroyuki Hijiya; Masamichi Tanida; Akio Koike; Manabu Nishizawa; Kazuo Tsubota; Toshihide Kurihara; Hidemasa Torii
- Web page: https://patentgrep.com/patent/US10865134B2

## CPC

- C03C 4/085: {for ultraviolet absorbing glass}
- C03C 3/083: containing aluminium oxide or an iron compound
- C03C 3/085: containing an oxide of a divalent metal
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 3/091: containing aluminium
- C03C 3/095: containing rare earths
- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- C03C 2204/00: Glasses, glazes or enamels with special properties
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A wavelength-selective transmissive glass has a light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less represented by the formula shown below of 1% or more in terms of a plate thickness of 6 mm and a light transmittance T315 nm or less at a wavelength of 315 nm or less represented by the formula shown below of 60% or less in terms of a plate thickness of 6 mm. Ak is a weighting factor at a wavelength k (nm) for calculating T (light transmittance) defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k (nm) in terms of a plate thickness of 6 mm: Tmore than 315 nm and 400 nm or less=(Σk=more than 315400Ak×Tk)/(Σk=more than 315400Ak) T315 nm or less=(Σk=300315Ak×Tk)/(Σk=300315Ak).

## Claims

### Claim 1

A wavelength-selective transmissive glass, comprising, as represented by mass % based on oxides,
a total iron content represented by Fe2O3 of from 0.04 to 0.15%, from 0.35 to 0.45% of CeO2, from 0 to 0.2% of TiO2, and from 0 to 0.2% of SnO2, wherein CeO2+3×TiO2+6×SnO2 is from 0.41 to 0.5, and a value of Fe-Redox is from 25 to 65%,
wherein a glass matrix composition comprises from 60 to 80%, of SiO2, from 0 to 7%, of Al2O3, from 0 to 10% of MgO, from 4 to 20% of CaO, from 7 to 20% of Na2O, from 0 to 10% of K2O, and 0.5% or less of B2O3,
having a light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of from more than 315 nm to 400 nm represented by the following formula of 1% or more in terms of a plate thickness of 6 mm and a light transmittance T315 nm or less at a wavelength of 315 nm or less represented by the following formula of 60% or less in terms of a plate thickness of 6 mm:
Tmore than 315 nm and 400 nm or less=(Σk=more than 315400Ak×Tk)/(Σk=more than 315400Ak)
T315 nm or less=(Σk=300315Ak×Tk)/(Σk=300315Ak),
wherein Ak is a weighting factor at a wavelength k in nm for calculating T which is light transmittance defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k in nm in terms of a plate thickness of 6 mm, and
having a dominant wavelength Dw measured using light source A of 460 to 510 nm in terms of a plate thickness of 6 mm.

### Claim 2 (depends on 1)

The wavelength-selective transmissive glass according to claim 1, comprising, as represented by mass % based on oxides:
from 65 to 75% of SiO2, from 0 to 5% of Al2O3, from 0 to 6% of MgO, from 5 to 12% of CaO, from 10 to 16% of Na2O, from 0 to 3% of K2O as a glass matrix composition, and
wherein [MgOH+CaO] is from 5 to 15% and [Na2O+K2O] is from 10 to 16%.

### Claim 3 (depends on 1)

The wavelength-selective transmissive glass according to claim 1, wherein [MgO+CaO] is from 5 to 15%.

### Claim 4 (depends on 1)

The wavelength-selective transmissive glass according to claim 1, wherein [Na2O+K2O] is from 10 to 16%.

### Claim 5 (depends on 1)

The wavelength-selective transmissive glass according to claim 1, having the Tmore than 315 nm and 400 nm or less of from 18 to 70% in terms of a plate thickness of 6 mm and T315 nm or less of 1% or less in terms of a plate thickness of 6 mm.

### Claim 6 (depends on 5)

The wavelength-selective transmissive glass according to claim 5, having the Tmore than 315 nm and 400 nm or less of from 50 to 68% in terms of a plate thickness of 6 mm and T315 nm or less of 0.1% or less in terms of a plate thickness of 6 mm.

### Claim 7 (depends on 1)

The wavelength-selective transmissive glass according to claim 1, having a light transmittance T360 to 400 nm at a wavelength of from 360 to 400 nm represented by the following formula of 1% or more in terms of a plate thickness of 6 mm:
T360-400 nm=(Σk=360400Ak×Tk)/(Σk=360400Ak),
wherein Ak is a weighting factor at a wavelength k in nm for calculating light transmittance T defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k in nm in terms of a plate thickness of 6 mm.

### Claim 8 (depends on 7)

The wavelength-selective transmissive glass according to claim 7, having the T360 to 400 nm of from 19 to 92% in terms of a plate thickness of 6 mm.

### Claim 9 (depends on 8)

The wavelength-selective transmissive glass according to claim 8, having the T360 to 400 nm of from 70 to 90% in terms of a plate thickness of 6 mm.

### Claim 10 (depends on 1)

The wavelength-selective transmissive glass according to claim 1, having a light transmittance T400 to 760 nm at a wavelength of from 400 to 760 nm represented by the following formula of 1% or more in terms of a plate thickness of 6 mm:
T400-760 nm=(Σk=400760A′k×Tk)/(Σk=400760A′k),
wherein A′k is a weighting factor at a wavelength k in nm for calculating visible light transmittance using light source D65, T_D65 defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k in nm in terms of a plate thickness of 6 mm.

### Claim 11 (depends on 10)

The wavelength-selective transmissive glass according to claim 10, having the T400 to 760 nm of from 40 to 92% in terms of a plate thickness of 6 mm.

### Claim 12 (depends on 11)

The wavelength-selective transmissive glass according to claim 11, having the T400 to 760 nm of from 80 to 92% in terms of a plate thickness of 6 mm.