SOLAR CELL CONCENTRATOR AND POWER GENERATION DEVICE USING SAME

WIPO Patent Application WO/2013/031570

A1

[Problem] To provide a solar cell concentration technique capable of minimizing loss caused by reflection in a homogenizer and such, while also achieving the effect of diffusing light collected by a primary concentrator. [Solution] A primary concentrator (11) concentrates light incident on the primary concentrator (11) toward a secondary concentrator (12). A concentration cone (122) projects light into an optical cavity (124) through a contracting section (123), by concentrating light incident on the concentration cone (122) through an opening (121). The amount of light leaking from the optical cavity (124) is reduced by the contracting section (123) having a smaller cross-sectional area than the maximum cross-sectional area of the optical cavity (124). The inner surface of the optical cavity (124) is an optically reflective surface. With the exception of the contracting section (123), the interior space of the optical cavity (124) is an enclosed space. The space through which an optical path passes from the primary concentrator (11) to the optical cavity (124) comprises a medium having a uniform refractive index, or is a vacuum.

WO/2003/001610	SOLAR ENERGY CONVERTER USING OPTICAL CONCENTRATION THROUGH A LIQUID
JPH07335925	SOLAR CELL

WATANABE KENTAROU (JP)
SUGIYAMA MASAKAZU (JP)
NAKANO YOSHIAKI (JP)

PCT/JP2012/071021

March 07, 2013

August 21, 2012

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UNIV TOKYO (JP)
WATANABE KENTAROU (JP)
SUGIYAMA MASAKAZU (JP)
NAKANO YOSHIAKI (JP)

H01L31/052; G02B5/10

US20110139242A1	2011-06-16
US20110089459A1	2011-04-21
JPH1068904A	1998-03-10
JP2001148501A	2001-05-29
JPH1131836A	1999-02-02

NARUSE, SHIGEO (JP)
Shigeo Naruse (JP)

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