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22 October 2010 New LED illumination optical engine for micro-projection display
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A new optical engine consisting of LEDs, rectangular CPC, rectangular lens array and micro display chip DMD is designed by using of KOLA illumination algorithm for micro-projection display. Detail description and analysis of the rectangular CPC and rectangular lens array are provided. The influence due to the size of rectangular CPC and rectangular lens array is analysed for illuminance uniformity on the DMD chip and light energy efficiency of the optical engine system by software ZEMAX. Based on the analysis of parameter of rectangular lens array, the size of rectangular lens array more decrease the illumination uniformity. Experimental results show that the proposed illumination light optical engine can obtain perfect rectangular focula with higher light uniformity more than 90 % and higher energy efficiency of 40 % to meet the needs of micro-projection display, at the same time the designed illumination optical engine compared with other uniformizing light algorithm have advantages such as: lesser capacity, high illumination uniformity.
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Chunhai Feng, Zhong Meng, and Wenjun Sun "New LED illumination optical engine for micro-projection display", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76583Y (22 October 2010);


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