OPTICAL FILTER AND METHOD OF MANUFACTURING SAME

• US 20190094429A1
• Filed: 09/11/2018
• Published: 03/28/2019
• Est. Priority Date: 09/28/2017
• Status: Active Grant

• Current Assignee: UTI Corporation (Integer Holdings Corporation Inc)
• Original Assignee: UTI Corporation (Integer Holdings Corporation Inc)
• Inventors: Park, Deok Young, Hwang, Jae Young, Kim, Hak Chul, Kim, Hyunho, Ha, Tea Joo, Lee, JongHwa
• Granted Patent: US 10,585,220 B2
• Time in Patent Office: Days
• CPC Class Codes: C03B 33/0222 Scoring using a focussed radiation beam, e.g. laser
• CPC Class Codes: C03C 17/34 with at least two coatings having different compositions C03C17/44 takes precedence
• CPC Class Codes: C03C 17/42 at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: C03C 21/002 to perform ion-exchange between alkali ions C03C21/005 takes precedence
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02B 5/281 designed for the infrared light
• CPC Class Codes: Y02P 40/57 Improving the yield, e-g- reduction of reject rates

Abstract

Disclosed is an optical filter and a method of manufacturing the same, the optical filter including a tempered glass substrate and an optical filter formed on upper and lower surfaces of the tempered glass substrate and the method including: forming a sheet-cutting portion on a base glass substrate on a per-cell basis; tempering the base glass substrate such that upper and lower surfaces of the base glass substrate are tempered and a side portion thereof is tempered through the sheet-cutting portion as well; forming an optical filter layer on each of upper and lower surfaces of the base glass substrate; and dividing the base glass substrate into cells where each cell serves as a cell-based optical filter.

Claims

1. An optical filter comprising:

a tempered glass substrate having a thickness of 0.05 mm to 0.3 mm; and

an optical filter formed on upper and lower surfaces of the tempered glass substrate,

wherein a strengthening resin layer is formed on either one or both of the upper and lower surfaces of the tempered glass substrate in a manner being interposed between the tempered glass substrate and the optical filter layer, and

the resin layer is configured in a thickness of 0.1 μ

m to 20 μ

m.

2. The optical filter of claim 1, wherein the tempered glass substrate is made of aluminosilicate glass and chemically tempered.

3. The optical filter of claim 2, wherein the chemical tempering is implemented at a temperature ranging from 350°

C. to 450°

C. using potassium nitrate (KNO3).

4. The optical filter of claim 1, the resin layer is selected from the group consisting of polycarbonate, epoxy resins, urethane resins, acrylic resins, acrylate, silane resins, and fluorine resins.

5. The optical filter of claim 1, the resin layer further includes a near-infrared absorbing component.

6. The optical filter of claim 1, wherein the optical filter layer is provided in which any one of a near-infrared reflective film and a visible light low reflection film is formed on each of the upper and lower surfaces of the tempered glass substrate, or a combination of the near-infrared reflective film and the visible light low reflection film is formed on each of the upper and lower surfaces of the tempered glass substrate to be served as the optical filter layer.

7. The optical filter of claim 1, wherein the optical filter is a near-infrared cutoff filter.

17. The optical filter of claim 3, wherein the optical filter is a near-infrared cutoff filter.

18. The optical filter of claim 6, wherein the optical filter is a near-infrared cutoff filter.

8. A method of manufacturing an optical filter, the method comprising:

forming a sheet-cutting portion on a base glass substrate having a thickness of 0.05 mm to 0.3 mm on a per-cell basis;

tempering the base glass substrate such that upper and lower surfaces thereof are tempered and a side portion thereof is tempered through the sheet-cutting portion as well;

forming an optical filter on each of upper and lower surfaces of the base glass substrate; and

dividing the base glass substrate into cells where each cell serves as a cell-based optical filter,

wherein, after tempering of the base glass substrate, a strengthening resin layer is formed on either one or both of the upper and lower surfaces of the base glass substrate in a manner being interposed between the base glass substrate and the optical filter layer, and

the resin layer is configured in a thickness of 0.1 μ

m to 20 μ

m.

9. The method of claim 8, wherein the base glass substrate is made of aluminosilicate glass.

10. The method of claim 9, wherein tempering of the base glass substrate is implemented by chemical tempering.

11. The method of claim 10, wherein the chemical tempering is implemented at a temperature ranging from 350°

C. to 450°

C. using potassium nitrate (KNO3).

12. The method of claim 8, wherein the sheet-cutting portion is formed by sheet-cutting the base glass substrate with a laser.

13. The method of claim 8, the resin layer is selected from the group consisting of polycarbonate, epoxy resins, urethane resins, acrylic resins, acrylate, silane resins, and fluorine resins.

14. The method of claim 8, the resin layer further includes a near-infrared absorbing component.

15. The method of claim 8, wherein the optical filter layer is provided as any one of a near-infrared reflective film or a visible light low reflection film, or a combination of the near-infrared reflective film and the visible light low reflection film

16. The method of claim 8, wherein the optical filter is a near-infrared cutoff filter.

19. The method of claim 11, wherein the optical filter is a near-infrared cutoff filter.

20. The method of claim 15, wherein the optical filter is a near-infrared cutoff filter.