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Proceedings Paper

A novel LED illumination system used in hand-held projector
Author(s): Wei Lu; Peifu Gu; Mo Shen
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Paper Abstract

Recently high brightness LED developed rapidly and would be a suitable replacement for hand-held projector compared with UHP lamp. Generally, uniformity and low etendue is required in illumination system of projection display, while the emitting distribution of HB-LED always has non-uniformity and large view angle. In this paper, we have designed a preliminary illuminator consisted of two curved reflective fly’s eyes especially for the lighting characteristic of HB-LED. By means of the asymmetric configuration we can get the small exit ray angle which reduces the etendue of illumination system. Because of reflective system, the embodiment is shorter than 20 mm. The uniformity is above 80% and the efficiency of the illuminator is better than 75%.

Paper Details

Date Published: 10 February 2005
PDF: 5 pages
Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); doi: 10.1117/12.574315
Show Author Affiliations
Wei Lu, Zhejiang Univ. (China)
Peifu Gu, Zhejiang Univ. (China)
Mo Shen, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 5638:
Optical Design and Testing II
Yongtian Wang; Zhicheng Weng; Shenghua Ye; Jose M. Sasian, Editor(s)

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