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Journal of Photonics for Energy

Simple Köhler homogenizers for image-forming solar concentrators
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Paper Abstract

Image-forming solar concentrators which project an image of the sun on the photovoltaic cell may have high thermodynamic efficiency, but suffer from non-uniform irradiance distribution and a nonsquare irradiance pattern. In this paper we discuss how to apply the Köhler illumination technique to solve these problems with an optimization approach. Two examples, a Fresnel lens-based concentrator and a two-mirror aplanatic system, are shown for demonstration. The uniformity of these systems is greatly improved by adding simple Köhler homogenizers in the form of aspheric lenses generated with our approach.

Paper Details

Date Published: 1 January 2011
PDF: 10 pages
J. Photon. Energy 1(1) 015503 doi: 10.1117/1.3565187
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Roland Winston, Univ. of California, Merced (United States)
Weiya Zhang, Univ. of California, Merced (United States)

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