Structure of spatial light modulator and lighting system therefo

Details Structure of spatial light modulator and lighting system therefo Structure of spatial light modulator and lighting system therefo

1998-12-08

2000-04-11

Sugarman, Scott J.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359496, 349 5, 349 63, G02F 103, G02F 11335, G02B 530

Patent

active

060494107

ABSTRACT:
A spatial light modulator and a lighting system used in, for example, projection displays are provided. The lighting system has a polarizing plate optically disposed in parallel to a light modulating layer of the spatial light modulator, thereby orienting the polarization of readout light beams incident on the spatial light modulator in the same direction to increase the contrast of images projected on a screen. The spatial light modulator is provided with a coupling prism having a side surface opposed to an entrance surface on which the readout light beams are incident. The side surface is so inclined inward as to allow stray light in the coupling prism to go out of the coupling prism without being reflected, thereby eliminating a decrease in contrast of images with a screen caused by the stray light.

REFERENCES:
patent: 5706066 (1998-01-01), Sawayama et al.

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