Diffuser, laser-light-source module using the same, and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10367330-B2
Application number	US-201615219304-A
Country	US
Kind code	B2
Filing date	Jul 26, 2016
Priority date	Mar 11, 2016
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

A diffuser includes a first substrate and a gel layer. The first substrate has a first refractive index n1. The gel layer includes a body and at least one microstructure. The body is disposed on the first substrate. The microstructure is disposed on the body, wherein the dimension of the microstructure is smaller than that of the body. The body is located between the microstructure and the first substrate. The gel layer has a second refractive index n2, and n1>n2.

First claim

What is claimed is:

1. A diffuser, comprising:
a first substrate having a first refractive index n1; and
a gel layer comprising:
a body disposed on the first substrate; and
at least one microstructure disposed on the body, wherein the dimension of the microstructure is smaller than the dimension of the body, the body is located between the microstructure and the first substrate, the microstructure comprises at least one particulate structure protruding from the body in a direction away from the first substrate, the gel layer has a second refractive index n2, and n1>n2.

2. The diffuser of claim 1 , further comprising:
a first anti-reflection layer disposed on the first substrate, wherein the first substrate is located between the first anti-reflection layer and the gel layer.

3. The diffuser of claim 1 , wherein a relationship between the first refractive index n1 and the second refractive index n2 is n1>n2>(n1+1)/2.

4. The diffuser of claim 2 , further comprising:
a second substrate, wherein the gel layer is located between the first substrate and the second substrate.

5. The diffuser of claim 4 , wherein the first substrate and the second substrate have substantially the same refractive index.

6. The diffuser of claim 4 , wherein the second substrate has a concave-convex surface facing toward the microstructure of the gel layer, and the microstructure of the gel layer is filled into the concave-convex surface of the second substrate.

7. The diffuser of claim 6 , wherein the first substrate has a concave-convex surface facing toward the gel layer, and the gel layer comprises a plurality of the microstructures, wherein one part of the microstructures is filled into the concave-convex surface of the first substrate, and another part of the microstructures is filled into the concave-convex surface of the second substrate.

8. The diffuser of claim 4 , further comprising:
a second anti-reflection layer, wherein the second substrate is located between the second anti-reflection layer and the gel layer.

9. The diffuser of claim 4 , further comprising:
a second anti-reflection layer, wherein the second anti-reflection layer is located between the second substrate and the gel layer.

10. The diffuser of claim 1 , wherein the first substrate is made of an inorganic material comprising at least one of the group of silicon oxide, glass, quartz, calcium fluoride and sapphire, wherein the gel layer is made of an organic material comprising at least one of the group of polysiloxanes and silicone.

11. The diffuser of claim 1 , wherein the body and the microstructure of the gel layer are formed integrally.

12. A laser-light-source module, comprising:
a diffuser, comprising:
a first substrate having a first refractive index n1; and
a gel layer comprising:
a body disposed on the first substrate; and
at least one microstructure disposed on the body, wherein the dimension of the microstructure is smaller than the dimension of the body, the body is located between the microstructure and the first substrate, the microstructure comprises at least one particulate structure protruding from the body in a direction away from the first substrate, the gel layer has a second refractive index n2, and n1>n2; and

a laser light source disposed at a side of the diffuser, wherein the first substrate of the diffuser is located between the laser light source and the gel layer.

13. The diffuser of claim 12 , wherein a relationship between the first refractive index n1 and the second refractive index n2 is n1>n2>(n1+1)/2.

14. The diffuser of claim 12 , wherein the body and the microstructure of the gel layer are formed integrally.

Assignees

• Delta Electronics Inc

Inventors

• Chang Keh-Su
• Lu Chun-Hsien
• Chou Yen-I
• Chen Chi

Classifications

• G02B5/0215

  the surface having a regular structure · CPC title

• G02B5/0294

  adapted to provide an additional optical effect, e.g. anti-reflection or filter · CPC title

• G02B5/0278

  used in transmission · CPC title

• H01S5/005 Primary

  Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping (H01S5/026, H01S5/18388 take precedence) · CPC title

• H01S5/0064 Primary

  Anti-reflection components, e.g. optical isolators · CPC title