26 April 2002 Compact design of the high-resolution projector using reflective LCD panel
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Proceedings Volume 4657, Projection Displays VIII; (2002); doi: 10.1117/12.463785
Event: Electronic Imaging, 2002, San Jose, California, United States
Abstract
A new compact front UXGA projector is introduced with three one inch reflective LCD panels; It delivers 1000 lumens with the advantages of the compactness and high resolution. Three PBS cubes and one recombination cube are employed for separation and recombination of the three primary colors. A newly developed PBS cube is used not only as a polarization selector but also as a dichroic mirror, and a parallelogram prism array is plugged in front of the polarization converter to make the green light and the blue light orthogonally polarized each others. Compared to the old design, this new one gets the advantage of the space savings. The telecentric projection F/2.5 lens is characterized as a zoom range from 45 mm to 55 mm. Lateral colors are eliminated to be under 0.8 pixels. MTF is estimated as 60% on axis and 40% at 0.7 field. Distortion is around -1.7%.
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Chao-Hsien Chen, Wei Shen, Fang-Chuan Ho, "Compact design of the high-resolution projector using reflective LCD panel", Proc. SPIE 4657, Projection Displays VIII, (26 April 2002); doi: 10.1117/12.463785; https://doi.org/10.1117/12.463785
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KEYWORDS
Projection systems

Polarization

LCDs

Reflectivity

Diffraction

Mirrors

Modulation transfer functions

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