# US 2025/0083993 A1 · Composition for eco-friendly infrared transmissive glass and method for manufacturing optical glass using the same

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- Number: US 2025/0083993 A1
- Document ID: US20250083993A1
- Status: Published application
- Kind: A1
- Application number: 17/640,208
- Filed: 2021-09-10
- Published: 2025-03-13
- Earliest claimed: 2020-09-16
- Assignees: Korea Photonics Technology Institute
- Applicants: Korea Photonics Technology Institute
- Inventors: Juhyeon CHOI; Seonhoon KIM; Weesam LEE; Jeonghwan IN
- Web page: https://patentgrep.com/patent/US20250083993A1

## CPC

- C03C 3/321: {Chalcogenide glasses, e.g. containing S, Se, Te}
- C03C 4/10: for infrared transmitting glass
- 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

## Abstract

A composition for eco-friendly infrared transmissive glass and a method for optical glass using the same are disclosed. According to an embodiment of the present invention, there is provided a method for manufacturing optical glass transmitting an infrared wavelength band of light by a preset reference value or more, comprising mixing preset contents of Ge, Ga, and Se and charging the mixture into a preset container, performing fusion on the preset container in a first preset environment, and gradually cooling the container in a second preset environment.

## Claims

### Claim 1

A composition for glass transmitting an infrared wavelength band of light by a preset reference value or more, wherein the composition comprises 22.5 mol % to 46.875 mol % of Ge, 1.875 mol % to 12.5 mol % of Ga, and a present content of Se.

### Claim 2

A method for manufacturing optical glass transmitting an infrared wavelength band of light by a preset reference value or more, the method comprising:
mixing present contents of Ge, Ga, and Se and charging the mixture into a preset container;
performing fusion on the preset container in a first preset environment; and
gradually cooling the container in a second preset environment.

### Claim 3 (depends on 2)

The method of claim 2, wherein in charging the mixture, 50 mol % to 70 mol % of Se and 30 mol % to 50 mol % of Ge and Ga are charged into the preset container, and wherein Ge and Ga are charged in a ratio of 3 to 15:1.

### Claim 4 (depends on 2)

The method of claim 2, wherein in the fusion, the fusion is performed on the preset container at 900° C. to 1000° C. for a preset time.

### Claim 5 (depends on 4)

The method of claim 4, wherein the preset time is 12 hours.

### Claim 6 (depends on 2)

The method of claim 2, wherein in gradually cooling the container, the container after fusion is gradually cooled at a glass transition temperature for a preset time.

### Claim 7 (depends on 6)

The method of claim 6, wherein the preset time is 3 hours.

### Claim 8

(canceled)

### Claim 9 (depends on 2)

The method of claim 2, wherein
the mixture further includes a present contents of Te.

### Claim 10 (depends on 9)

The method of claim 9, wherein in charging the mixture, x mol % of Te, (50−x) mol % to (70−x) mol % of Se, and 30 mol % to 50 mol % of Ga are charged into the preset container, and wherein Ge and Ga are charged in a ratio of 3 to 15:1.

### Claim 11 (depends on 10)

The method of claim 10, wherein 1 mol % to 7 mol % of Te is charged into the preset container.

### Claim 12 (depends on 9)

The method of claim 9, wherein in the fusion, the fusion is performed on the preset container at 900° C. to 1000° C. for a preset time.

### Claim 13

(canceled)

### Claim 14 (depends on 2)

The method of claim 2, wherein
the mixture further includes a present contents of S.

### Claim 15 (depends on 14)

The method of claim 14, wherein in charging the mixture, x mol % of Te, (50−x) mol % to (70−x) mol % of Se, and 30 mol % to 50 mol % of Ga are charged into the preset container, and wherein Ge and Ga are charged in a ratio of 3 to 15:1.

### Claim 16 (depends on 15)

The method of claim 15, wherein 10 mol % to 50 mol % of S is charged into the preset container.

### Claim 16 (depends on 1)

The composition of claim 1, wherein the preset content is 50 mol % to 70 mol %.

### Claim 17 (depends on 1)

The composition of claim 1, wherein the preset content is 43 mol % to 69 mol %, and wherein the composition further comprises 1 mol % to 7 mol % of Te.

### Claim 18 (depends on 1)

The composition of claim 1, wherein the preset content is 10 mol % to 57.5 mol %, and wherein the composition further comprises 2.5 mol % to 50 mol % of S.