Solar light concentration plate

Patent metadata

Field	Value
Publication number	US-9372297-B2
Application number	US-201514625422-A
Country	US
Kind code	B2
Filing date	Feb 18, 2015
Priority date	Feb 1, 2011
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

A solar light concentration plate comprises a first hologram which receives solar light and diffracts incident light in a range of an incident angle, and first and second light guides respectively disposed on both sides of the first hologram, wherein at least one of the first and second light guides has an outer surface substantially inclined to an inner surface of the at least one of the first and second light guides.

First claim

What is claimed is:

1. A solar light concentration plate comprising:
a first hologram which receives solar light and diffracts incident solar light having an incident angle; and
first and second light guides respectively disposed on both sides of the first hologram,
wherein at least one of the first and second light guides has an outer surface having a tilt angle substantially inclined to an inner surface of the at least one of the first and second light guides,
wherein the outer surface is configured to directly receive the incident solar light from outside of the solar light concentration plate, and
wherein the outer surface is substantially flat, is disposed opposite the inner surface, and does not meet the inner surface.

2. The solar light concentration plate of claim 1 , wherein the first hologram diffracts the incident solar light at a diffraction angle greater than a critical angle of total reflection of the first and second light guides.

3. The solar light concentration plate of claim 1 , wherein the first hologram causes diffraction to light which has a wavelength range.

4. The solar light concentration plate of claim 3 , wherein the wavelength range is about 10 nanometers to about 300 nanometers.

5. The solar light concentration plate of claim 1 , wherein each of the first and second light guides has an outer surface inclined to an inner surface of each of the first and second light guides.

6. The solar light concentration plate of claim 1 , wherein the tilt angle is about 1 degree to about 10 degrees.

7. The solar light concentration plate of claim 1 , wherein the first hologram comprises a phase hologram.

8. The solar light concentration plate of claim 7 , wherein a thickness of the first hologram is equal to or greater than about 1 micron.

9. The solar light concentration plate of claim 1 , wherein the first hologram selects, diffracts, and separates a portion which has a predetermined wavelength range from the incident light.

10. The solar light concentration plate of claim 1 , further comprising at least one second hologram aligned substantially parallel to the first hologram.

11. The solar light concentration plate of claim 1 , wherein the tilt angle is greater than a quarter of an angular selectivity of the first hologram.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Joo Won-Jae

Classifications

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• G02B6/0015

  provided on the surface of the light guide or in the bulk of it · CPC title

• H10F77/488

  Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection · CPC title

• G02B19/0042

  for use with direct solar radiation · CPC title

• G02B5/32 Primary

  Holograms used as optical elements · CPC title