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Opt Express. 2012 Jan 2;20(1):A75-84.

Collimating lamp with well color mixing of red/green/blue LEDs.

Author information

1
Institute of Lighting and Display Science /Department of Optics and Photonics, National Central University, Chung-Li, 320, Taiwan. ccsun@dop.ncu.edu.tw

Abstract

A novel light luminaire is proposed and experimentally analyzed, which efficiently mixes and projects the tunable light from red, green and blue (RGB) light-emitting diodes (LEDs). Simultaneous light collimation and color mixing is a challenging task because most collimators separate colors, and most color mixers spread the light beam. Our method is simple and compact; it only uses a short light pipe, a thin diffuser, and a total internal reflection lens. We performed an experimental study to find a balance between optical efficiency and color uniformity by changing light recycling and color mixing.

PMID:
22379671
[Indexed for MEDLINE]
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