Optical window member

• US 20080198469A1
• Filed: 07/03/2007
• Published: 08/21/2008
• Est. Priority Date: 02/20/2007
• Status: Active Grant

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Arita, Takashi, Yuba, Takashi
• Granted Patent: US 8,164,833 B2
• Time in Patent Office: Days
• US Class Current: 359/599
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: G02B 5/0215 the surface having a regular structure
• CPC Class Codes: G02B 5/0231 the surface having microprismatic or micropyramidal shape macroscopic prism arrays G02B5/045
• CPC Class Codes: G02B 5/0268 characterized by the fabrication or manufacturing method
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: Y02E 10/52 PV systems with concentrators

Abstract

A disclosed optical window member includes a transparent synthetic resin plate comprising a surface with a protruding/recessed pattern of a predetermined fineness that causes light diffusion; and an optical thin film formed on the surface of the transparent synthetic resin plate with the protruding/recessed pattern. The optical thin film determines a component of light transmitted through the optical thin film and light reflected from the optical thin film.

Claims

1. An optical window member comprising:

a transparent synthetic resin plate comprising a surface with a protruding/recessed pattern of a predetermined fineness that causes light diffusion; and

an optical thin film formed on the surface of the transparent synthetic resin plate with the protruding/recessed pattern, wherein the optical thin film determines a component of light transmitted through the optical thin film and light reflected from the optical thin film.

2. The optical window member according to claim 1, wherein:

the surface of the transparent synthetic resin plate is divided into plural sections; and

the protruding/recessed pattern is different in each of the sections.

3. The optical window member according to claim 1, wherein:

the protruding/recessed pattern comprises plural protrusions; and

each of the protrusions has a sectional shape that is any one of a triangle, a trapezoid, a semicircle, and a trapezoid whose oblique sides are both staircase-like lines.

4. The optical window member according to claim 1, wherein:

the protruding/recessed pattern comprises plural protrusions; and

each of the protrusions comprises three disks with different diameters stacked on top of each other in order of diameter size, with the largest disk arranged at the bottom.

5. The optical window member according to claim 1, wherein:

the optical thin film comprises at least one thin film of a high refractive index and at least one thin film of a low refractive index that are laminated alternately.

6. A device comprising:

a solar battery; and

the optical window member according to claim 1 covering the solar battery.

7. A device comprising:

a solar battery; and

the optical window member according to claim 2 covering the solar battery.

8. A device comprising:

a solar battery; and

the optical window member according to claim 3 covering the solar battery.

9. A device comprising:

a solar battery; and

the optical window member according to claim 4 covering the solar battery.

10. A device comprising:

a solar battery; and

the optical window member according to claim 5 covering the solar battery.