We demonstrate that the Köhler illumination technique can be applied to the image‐forming solar concentrators to solve the problem of “hot” spot and to generate the square irradiance pattern. The Köhler homogenizer can be simply a single aspheric lens optimized following a few guidelines. Two examples are given including a Fresnel lens based concentrator and a two‐mirror aplanatic system.

Topics
Tectonophysics, Optical imaging, Lenses, Solar concentrators
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© 2011 American Institute of Physics.
2011
American Institute of Physics
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