Simple Köhler homogenizers for image-forming solar concentrators

Roland Winston; Weiya Zhang

doi:10.1117/1.3565187

1 January 2011 Simple Köhler homogenizers for image-forming solar concentrators

Roland Winston, Weiya Zhang

Author Affiliations +

Journal of Photonics for Energy, Vol. 1, Issue 1, 015503 (January 2011). https://doi.org/10.1117/1.3565187

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.

Citation Download Citation

Roland Winston and Weiya Zhang "Simple Köhler homogenizers for image-forming solar concentrators," Journal of Photonics for Energy 1(1), 015503 (1 January 2011). https://doi.org/10.1117/1.3565187

Published: 1 January 2011

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