# US 12,767,585 B2 · Optical glass, optical element blank, and optical element

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

- Number: US 12,767,585 B2
- Document ID: US12767585B2
- Status: Granted
- Kind: B2
- Application number: 18/115,842
- Filed: 2023-03-01
- Published: 2023-09-07
- Granted: 2026-10-20
- Earliest claimed: 2022-03-07
- Assignees: Hoya Corporation; Hoya Optical Technology (Weihai) Co., Ltd.
- Applicants: Hoya Corporation; Hoya Optical Technology (Weihai) Co., Ltd.
- Inventors: Hayato Sasaki
- Web page: https://patentgrep.com/patent/US12767585B2

## CPC

- C03C 3/21: containing titanium, zirconium, vanadium, tungsten or molybdenum
- C03C 3/062: with less than 40% silica by weight
- G02B 6/0065: {Manufacturing aspects; Material aspects}
- G02B 27/0172: {characterised by optical features}
- G02B 6/0025: {Diffusing sheet or layer; Prismatic sheet or layer}
- G02B 6/0026: {Wavelength selective element, sheet or layer, e.g. filter or grating}
- G02B 6/003: {Lens or lenticular sheet or layer}
- G02B 2027/0132: {comprising binocular systems}
- G02B 2027/0174: {holographic}
- G02B 2027/0178: {Eyeglass type (eyeglass details G02C)}
- 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

Provided is optical glass in which a refractive index nd is 1.950 or more, an amount of P2O5 is 10.0 to 40.0 mass %, an amount of TiO2 is 5.0 to 40.0 mass %, an amount of Nb2O5 is 20.0 to 60.0 mass %, an amount of Bi2O3 is 20.0 mass % or less, a total amount of Al2O3 and SiO2 [Al2O3+SiO2] is 2.0 mass % or less, a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 5.0 mass % or less, and a total amount of ZnO, SrO, and BaO [ZnO+SrO+BaO] is 0.01 to 12.0 mass %.

## Claims

### Claim 1

Optical glass,
wherein a refractive index nd is 1.950 or more,
an amount of P2O5 is 10.0 to 40.0 mass %,
an amount of TiO2 is 18.0 to 40.0 mass %,
an amount of Nb2O5 is 20.0 to 60.0 mass %,
an amount of Bi2O3 is 20.0 mass % or less,
an amount of WO3 is 15.0 mass % or less,
a total amount of Al2O3 and SiO2 [Al2O3+SiO2] is 2.0 mass % or less,
a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 5.0 mass % or less,
a total amount of ZnO, SrO, and BaO [ZnO+SrO+BaO] is 0.01 to 12.0 mass %,
a mass ratio [TiO2/(TiO2+Nb2O5)] between the amount of TiO2 and the total amount of TiO2 and Nb2O5 [TiO2+Nb2O5] is 0.20 to 0.60,
a mass ratio [(Li2O+Na2O+MgO+CaO+ZnO+SrO)/(K2O+BaO)] between a total amount of Li2O, Na2O, MgO, CaO, ZnO, and SrO [Li2O+Na2O+MgO+CaO+ZnO+SrO], and a total amount of K2O and BaO [K2O+BaO] is 0.51 or less, and
a mass ratio [TiO2/([Li2O+Na2O+K2O])] between the amount of TiO2 and the total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 1.0 to 50.

### Claim 2 (depends on 1)

The optical glass according to claim 1, wherein a total amount of P2O5, TiO2, and Nb2O5 [P2O5+TiO2+Nb2O5] is 70.0 to 98.0 mass %.

### Claim 3 (depends on 1)

The optical glass according to claim 1, wherein a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO] is 0.1 to 12.0 mass %.

### Claim 4 (depends on 1)

The optical glass according to claim 1, wherein a total amount of Li2O, Na2O, K2O, MgO, CaO, ZnO, SrO, and BaO [Li2O+Na2O+K2O+MgO+CaO+ZnO+SrO+BaO] is 0.5 to 17.0 mass %.

### Claim 5 (depends on 1)

The optical glass according to claim 1, wherein a total amount of TiO2 and Nb2O5 [TiO2+Nb2O5] is 40.0 to 80.0 mass %.

### Claim 6 (depends on 1)

The optical glass according to claim 1, wherein a mass ratio [P2O5/(P2O5+TiO2+Nb2O5)] between the amount of P2O5 and a total amount of P2O5, TiO2, and Nb2O5 [P2O5+TiO2+Nb2O5] is 0.15 to 0.40.

### Claim 7 (depends on 1)

The optical glass according to claim 1, wherein a mass ratio [K2O/(Li2O+Na2O+K2O)] between an amount of K2O and the total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is more than 0.

### Claim 8 (depends on 1)

The optical glass according to claim 1, wherein a mass ratio [(Mg0+CaO+ZnO+SrO+BaO)/(Li2O+Na2O+K2O)] between a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO], and the total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 0.10 to 300.

### Claim 9 (depends on 1)

The optical glass according to claim 1, wherein a mass ratio [BaO/([MgO+CaO+ZnO+SrO+BaO])] between an amount of BaO and a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO] is more than 0.

### Claim 10 (depends on 1)

The optical glass according to claim 1, wherein a mass ratio [TiO2/(MgO+CaO+ZnO+SrO+BaO)] between the amount of TiO2 and a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO] is 0.1 to 50.0.

### Claim 11 (depends on 1)

The optical glass according to claim 1,
wherein
a mass ratio [TiO2/(TiO2+Nb2O5+WO3+Bi2O3)] between the amount of TiO2 and a total amount of TiO2, Nb2O5, WO3, and Bi2O3 is 0.10 to 0.60.

### Claim 12 (depends on 1)

The optical glass according to claim 1, wherein a mass ratio [(TiO2+Nb2O5)/(SiO2+B2O3+Li2O+Na2O+K2O+MgO+CaO+ZnO+SrO+BaO)] between a total amount of TiO2 and Nb2O5 [TiO2+Nb2O5] and a total amount of SiO2, B2O3, Li2O, Na2O, K2O, MgO, CaO, ZnO, SrO, and BaO [SiO2+B2O3+Li2O+Na2O+K2O+MgO+CaO+ZnO+SrO+BaO] is 0.5 to 20.0.

### Claim 13 (depends on 1)

The optical glass according to claim 1, wherein an Abbe number νd is 15.0 to 20.0.

### Claim 14 (depends on 1)

The optical glass according to claim 1, wherein a specific gravity is 4.20 or less.

### Claim 15 (depends on 1)

The optical glass according to claim 1, wherein a ratio [nd/d] between a refractive index nd and a specific gravity d is 0.48 or more.

### Claim 16 (depends on 1)

An optical element blank comprising the optical glass according to claim 1.

### Claim 17 (depends on 1)

An optical element comprising the optical glass according to claim 1.