High-performance illumination module of RGB LEDs pico-projector with dual double side micro lens array

Chun-Chieh Chen; Hsin-Chieh Wu; Moint-Learn Wu; Yuan-Chieh Cheng; Wei-Yao Hsu

doi:10.1117/12.929532

11 October 2012 High-performance illumination module of RGB LEDs pico-projector with dual double side micro lens array

Chun-Chieh Chen, Hsin-Chieh Wu, Moint-Learn Wu, Yuan-Chieh Cheng, Wei-Yao Hsu

Proceedings Volume 8485, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX; 84850U (2012) https://doi.org/10.1117/12.929532
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

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.

Citation Download Citation

Chun-Chieh Chen, Hsin-Chieh Wu, Moint-Learn Wu, Yuan-Chieh Cheng, and Wei-Yao Hsu "High-performance illumination module of RGB LEDs pico-projector with dual double side micro lens array", Proc. SPIE 8485, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX, 84850U (11 October 2012); https://doi.org/10.1117/12.929532

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