Browsing by Author "Su, Yu-Chung"

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Achromatic design in the illumination system for a mini projector with LED light source
(2011-01-01)
Lin, Sheng-Han
;
Pan, Jui-Wen
;
Wang, Hsiang-Hua
;
Tsai, Pei-Jung
;
Su, Yu-Chung
We provide a novel achromatic design in the illumination system for a mini projector with an LED light source. The lateral color aberration at the corners of the DMD active area can be reduced to 0.48 mu m by our compact ATIR prism. The total prism size is 4091 mm(3).
Optimized planar micro-optic concentrator design
(2016-06)
Pan, Jui-Wen
;
Su, Yu-Chung
;
Lee, Sheng-Yi
;
光電系統研究所
;
Institute of Photonic System
The structural parameters of a planar micro-optic concentrator are optimized. First, the direct-loss is minimized by altering the relationship between the f-number of the lenslet, the angle of the micro-structure and the ray paths in the planar micro-optic concentrator. Second, the size of the micro-structure is made equal to the mini-blur size of the lenslet in order to reduce the non-direct loss. Last, the f-number and the entrance pupil diameter of the lenslet are determined by the relationships among the f-number, the entrance pupil diameter, the optical efficiency, the acceptance angle and the thickness of the planar micro-optic concentrator from the optical simulation results. For an optimized planar micro-optic concentrator with a 300x concentration, the f-number of the lenslet, the EPD of the lenslet, the angle of the micro-structure and the thickness of the planar micro-optic concentrator are 2.6, 1.49 mm, 120 degrees and 5.97 mm, respectively. For micro-structures 28.95 mu m, 51.24 mu m and 88.29 mu m in size, the half acceptance angles of the planar micro-optic concentrator are 0.115 degrees, 0.275 degrees and 0.55 degrees, respectively, and the optical efficiencies are 81.23%, 71.92% and 50.02%, respectively.