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Optical Engineering

Optical design in illumination system of digital light processing projector using laser and gradient-index lens
Author(s): Dawei Rui; Zulun Lin; Kang-Cheng Qi; Wenbin Chen
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Paper Abstract

A novel structure of illumination system based on laser sources and gradient-index (GRIN) lens arrays for single-plate digital light processing (DLP) projector is proposed. Under the evaluation of light collection efficiency and illumination uniformity, we designed two different architectures of GRIN lens arrays: the unit lens cross section being either square or circular. Also, we designed the one-to-one coupling mechanism between GRIN lens array and Gaussian beam array. By means of three-dimensional modeling and ray tracing, we simulated the optical characteristics of illumination system, and the optical parameters are evaluated. Results show that the total light collection efficiency is 37.9%, the illumination uniformity is 89.7% and the volume is only 12.4 cm3. Thus we improved optical characteristics and reduced the physical dimension of DLP optical engine.

Paper Details

Date Published: 20 January 2012
PDF: 8 pages
Opt. Eng. 51(1) 013004 doi: 10.1117/1.OE.51.1.013004
Published in: Optical Engineering Volume 51, Issue 1
Show Author Affiliations
Dawei Rui, Univ. of Electronic Science and Technology of China (China)
Zulun Lin, Univ. of Electronic Science and Technology of China (China)
Kang-Cheng Qi, Univ. of Electronic Science and Technology of China (China)
Wenbin Chen, Univ. of Electronic Science and Technology of China (China)


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