COMPOUND KOHLER SOLAR CONCENTRATOR WITH OPTIONAL SPECTRUM SPLITTING PHOTOVOLTAIC APPARATUS
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United States of America Patent
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Issued Date -
Jul 13, 2017
app pub date -
Jun 9, 2015
filing date -
Nov 20, 2009
priority date (Note) -
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Abstract
A high concentration photovoltaic device has a Fresnel lens having a front side and a back side, which may be mounted on a cover plate, and a mirror behind the Fresnel lens and facing the Fresnel lens. A secondary lens is unitary with the Fresnel lens and facing the mirror, and is typically on the inside of the cover plate in the center of the Fresnel lens. A photovoltaic cell in front of the secondary lens faces the mirror through the secondary lens. An additional focusing lens may be provided in front of the mirror. Two optical elements of said device form a Köhler integrator between a remote source, usually the sun, in front of the device and the photovoltaic cell as a target. The mirror may be spectrally selective, with a secondary photovoltaic cell behind the mirror. Additional photovoltaic cells to collect unfocused light may surround the mirror.
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