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Proceedings Paper

Freeform TIR collimators for the removal of angular color variation in white LED spotlights
Author(s): Corien Prins; Christine Schneider; Wilbert IJzerman; Teus Tukker; Jan ten Thije Boonkkamp
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Paper 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.

Paper Details

Date Published: 18 September 2013
PDF: 10 pages
Proc. SPIE 8834, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X, 88340J (18 September 2013);
Show Author Affiliations
Corien Prins, Technische Univ. Eindhoven (Netherlands)
Christine Schneider, Karlsruher Institut für Technologie (Germany)
Wilbert IJzerman, Philips Lighting (Netherlands)
Teus Tukker, Philips Research (Netherlands)
Jan ten Thije Boonkkamp, Technische Univ. Eindhoven (Netherlands)

Published in SPIE Proceedings Vol. 8834:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X
Roland Winston; Jeffrey Gordon, Editor(s)

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