An inverse method for color uniformity in white LED spotlights

C.R. Prins, J.H.M. Thije Boonkkamp, ten, T.W. Tukker, W.L. IJzerman

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Color over Angle (CoA) variation in the light output of white phosphor-converted LEDs is a common problem in LED lighting technology. In this article we propose an inverse method to design an optical element that eliminates the color variation for a point light source. The method in this article is an improved version of an earlier method [1], and provides more design freedom. We derive a mathematical model for color mixing in a collimator and present a numerical algorithm to solve it. We verify the results using Monte-Carlo ray tracing.
Original languageEnglish
Place of PublicationEindhoven
PublisherTechnische Universiteit Eindhoven
Number of pages18
Publication statusPublished - 2013

Publication series

ISSN (Print)0926-4507

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    Prins, C. R., Thije Boonkkamp, ten, J. H. M., Tukker, T. W., & IJzerman, W. L. (2013). An inverse method for color uniformity in white LED spotlights. (CASA-report; Vol. 1302). Technische Universiteit Eindhoven.