A compact LED color mixing scheme with the etendue of a single chip

George Ouyang; Kenneth Li

doi:10.1117/12.737144

24 September 2007 A compact LED color mixing scheme with the etendue of a single chip

George Ouyang, Kenneth Li

Proceedings Volume 6670, Nonimaging Optics and Efficient Illumination Systems IV; 66700D (2007) https://doi.org/10.1117/12.737144
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

An etendue efficient, prism-based LED color mixing scheme is presented in this paper. The prisms have dichroic coatings deposited on their diagonal surfaces and serve as beam splitters which selectively pass or reflect light of different wavelengths. Light confinement within the prisms is achieved through waveguiding, which is first explained in theory, and then verified by some preliminary experimental results. The compact size of this device makes it especially attractive for miniaturized projector systems.

Citation Download Citation

George Ouyang and Kenneth Li "A compact LED color mixing scheme with the etendue of a single chip", Proc. SPIE 6670, Nonimaging Optics and Efficient Illumination Systems IV, 66700D (24 September 2007); https://doi.org/10.1117/12.737144

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