Köhler Integrators Embedded into Illumination Optics Add Functionality (2008)

SPIE EOD08-OSD0-19 010.pdf (2008)

This work reviews the Köhler concept and its application to different kind of optics, ranging from photovoltaic concentrators to automotive LED headlights. In the former, it is shown how irradiance peaks on the solar cell can be avoided, while preserving high aiming tolerance (acceptance) of the solar concentrator. In the latter, it is to shown how to overcome the drawbacks associated with large source image sizes, as well as source misalignments, ill defined source edges, and how low source radiance can be compensated for.