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- W2140196824 abstract "We present an elliptic spot illumination system for a color filter–liquid-crystal-on-silicon (CF-LCoS) pico projector employing a specifically designed free-form lens and a cylindrical lens to improve on previous designs in terms of optical efficiency while yielding an ultracompact and low-cost optical architecture. The detailed design description of the optical system is thoroughly investigated. Simulation results coincide well with the theoretical calculation. The single 1  mm×1  mm LED chip-powered optical engine, which employs a CF-LCoS panel with a diagonal of 0.28 in and an aspect ratio of 4∶3, has an estimated output efficiency over 9.8% (11.8 lm@1 W) and an ANSI 9-point uniformity over 88.5%, with the ultrasmall volume 24  mm×19  mm×7  mm. Compared to the circular spot-illuminated projection system, a total increment of about 23% of system efficiency is available with this improved optical engine. It is believed that there would be a huge market potential to commercialize our design." @default.
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- W2140196824 date "2012-05-23" @default.
- W2140196824 modified "2023-10-18" @default.
- W2140196824 title "Design of an elliptic spot illumination system in LED-based color filter–liquid-crystal-on-silicon pico projectors for mobile embedded projection" @default.
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- W2140196824 doi "https://doi.org/10.1364/ao.51.003162" @default.
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