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18 September 2013 Freeform TIR collimators for the removal of angular color variation in white LED spotlights
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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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Corien Prins, Christine Schneider, Wilbert IJzerman, Teus Tukker, and Jan ten Thije Boonkkamp "Freeform TIR collimators for the removal of angular color variation in white LED spotlights", Proc. SPIE 8834, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X, 88340J (18 September 2013); https://doi.org/10.1117/12.2023870
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