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Proceedings Paper

High-performance illumination module of RGB LEDs pico-projector with dual double side micro lens array
Author(s): Chun-Chieh Chen; Hsin-Chieh Wu; Moint-Learn Wu; Yuan-Chieh Cheng; Wei-Yao Hsu
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Paper Abstract

In this research, we propose a high performance non-image illumination module of pico-projector which includes light source, collimator and liquid crystal on silicon (LCoS) panel. The light source is RGB LED. The collimator consists of two glass collimator lenses and two double sides micro lens array (MLA) for light homogenizer. MLAs play a critical role in the LED illumination module. Dual double-side MLAs have been adopted for the homogenizer to satisfy the numerical aperture in the optical design. The good uniformity and high accuracy MLA structure was generated by ultra precision diamond shaping method and the MLA plate is subsequently fabricated by injection molding. Finally, a non-image illumination module with power efficiency 30.87 lm/w and uniformity of 56% on LCoS panel in a very compact size, less than 1.6 cm3 in volume, has been developed.

Paper Details

Date Published: 11 October 2012
PDF: 7 pages
Proc. SPIE 8485, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX, 84850U (11 October 2012); doi: 10.1117/12.929532
Show Author Affiliations
Chun-Chieh Chen, Instrument Technology Research Ctr. (Taiwan)
Hsin-Chieh Wu, National Central Univ. (Taiwan)
Moint-Learn Wu, National Central Univ. (Taiwan)
Yuan-Chieh Cheng, Instrument Technology Research Ctr. (Taiwan)
Wei-Yao Hsu, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 8485:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX
Roland Winston; Jeffrey M. Gordon, Editor(s)

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