20 January 2012 Optical design in illumination system of digital light processing projector using laser and gradient-index lens
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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.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Dawei Rui, Dawei Rui, Zulun Lin, Zulun Lin, Kang-Cheng Qi, Kang-Cheng Qi, Wenbin Chen, Wenbin Chen, } "Optical design in illumination system of digital light processing projector using laser and gradient-index lens," Optical Engineering 51(1), 013004 (20 January 2012). https://doi.org/10.1117/1.OE.51.1.013004 . Submission:
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