Köhler integration in color mixing collimators

Oliver Dross

doi:10.1117/12.2189485

8 September 2015 Köhler integration in color mixing collimators

Oliver Dross

Proceedings Volume 9571, Fourteenth International Conference on Solid State Lighting and LED-based Illumination Systems; 957109 (2015) https://doi.org/10.1117/12.2189485
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Köhler integrating lenslet arrays can provide collimated, uniform, and color mixed beams from an array of sources of arbitrary color. The integration can be achieved with two lenslet arrays after collimation, with lenslet arrays embedded into certain collimators or close to the sources before collimation with a double sided lenslet shell. The degree of color mixing of the different approaches can be less than ideal. We have investigated the main mixing degradation mechanisms both in the near and in the far field and quantified them for certain source and architecture combinations. From this analysis we can derive simple design rules for successful color mixing.

Citation Download Citation

Oliver Dross "Köhler integration in color mixing collimators", Proc. SPIE 9571, Fourteenth International Conference on Solid State Lighting and LED-based Illumination Systems, 957109 (8 September 2015); https://doi.org/10.1117/12.2189485

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