Freeform TIR collimators for the removal of angular color variation in white LED spotlights

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

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Abstract

Angular color variation in white, phosphor-converted LEDs causes undesirable yellow rings in the beams of spotlights. We developed an inverse method to design TIR collimators that remove the angular color variation for point light sources and significantly reduce color variation for extended light sources, without the need for facets, holographic foils or scattering surfaces. We performed several numerical simulations to evaluate the performance of this point source method for extended light sources.
Original languageEnglish
Title of host publicationProceedings of Nonimaging Optics : Efficient Design for Illumination and Solar Concentration X (San Diego CA, USA, August 25-26, 2013)
EditorsR. Winston, J. Gordon
Place of PublicationWashington
PublisherSPIE
Pages88340J/1-10
ISBN (Print)978-081949684-3
DOIs
Publication statusPublished - 2013
Eventconference; Nonimaging Optics : Efficient Design for Illumination and Solar Concentration X; 2013-08-25; 2013-08-26 -
Duration: 25 Aug 201326 Aug 2013

Publication series

NameProceedings of SPIE
Volume8834
ISSN (Print)0277-786X

Conference

Conferenceconference; Nonimaging Optics : Efficient Design for Illumination and Solar Concentration X; 2013-08-25; 2013-08-26
Period25/08/1326/08/13
OtherNonimaging Optics : Efficient Design for Illumination and Solar Concentration X

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    Prins, C. R., Schneider, C., IJzerman, W. L., Tukker, T. W., & Thije Boonkkamp, ten, J. H. M. (2013). Freeform TIR collimators for the removal of angular color variation in white LED spotlights. In R. Winston, & J. Gordon (Eds.), Proceedings of Nonimaging Optics : Efficient Design for Illumination and Solar Concentration X (San Diego CA, USA, August 25-26, 2013) (pp. 88340J/1-10). (Proceedings of SPIE; Vol. 8834). SPIE. https://doi.org/10.1117/12.2023870