Development of a double-sided micro lens array for micro laser projector application |
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Authors: | Fong-Zhi Chen Cheng-Huan Chen Cheng-Hsien Wu Ching-Hsiang Kuo Jyh-Rou Sze Wei-Yao Hsu Yuan-Chieh Cheng |
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Institution: | 3. Instrument Technology Research Center, National Applied Research Laboratories, No. 20 R&D Rd. VI, Hsinchu Science Park, Hsinchu, 300, Taiwan 1. Department of Power Mechanical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, 300, Taiwan 2. Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, No. 415 Chien Kung Road, Kaohsiung, 807, Taiwan
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Abstract: | This paper introduces the development of a double-sided micro lens array (DSMLA) for application in micro laser projectors. For commercial mass production, it is necessary to investigate the concurrent engineering of optical design, mold fabrication, and plastic injection molding at once. This experiment based the design of the micro lens array on the scalar diffraction theory. The proposed DSMLA can simultaneously shape red, green, and blue laser beams into a uniform projection pattern. An ultra precision diamond turning machine using a slow tool servo method fabricated the mold. The study considered optical design constraints from the feedback of mold fabrication and plastic injection molding, measuring and comparing fabricated samples with calculated results. Experimental results show that the fabricated DSMLAs achieve the desired function and application feasibility for micro laser projectors. |
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