A novel LED illumination system used in hand-held projector

Wei Lu; Peifu Gu; Mo Shen

doi:10.1117/12.574315

10 February 2005 A novel LED illumination system used in hand-held projector

Wei Lu, Peifu Gu, Mo Shen

Proceedings Volume 5638, Optical Design and Testing II; (2005) https://doi.org/10.1117/12.574315
Event: Photonics Asia, 2004, Beijing, China

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%.

Citation Download Citation

Wei Lu, Peifu Gu, and Mo Shen "A novel LED illumination system used in hand-held projector", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.574315

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