Polarized illumination system for LCD projector

Details Polarized illumination system for LCD projector Polarized illumination system for LCD projector

1996-03-29

1999-11-30

Shafer, Ricky D.

Optical: systems and elements

Polarization without modulation

Polarizarion by dichroism

359495, 359496, 359619, 359625, 359627, 359640, 359834, 359837, G02B 504, G02B 530, G02B 2728

Patent

active

059952849

ABSTRACT:
An illumination system is described that efficiently produces linear polarized light for use in LCD projection. A polarizing beam splitter and half-wave retarder plate produce two adjacent collimated beams of light having a common polarization direction. These adjacent beams are spatially integrated into a single collimated polarized beam whose aspect ratio is subsequently converted to match that of the LCD format.

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Authors: M. Imai, M. Sakamoto, K. Kubota, Y. Kato, and N. Nishida Title: "High-Brightness Liquid Crystal Light Valve Projector Using A New Polarization Converter" SPIE vol. 1255 Large-Screen Projection Displays II (1990); pp. 52-58.

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