Illumination attenuation system

Details Illumination attenuation system Illumination attenuation system

2007-06-05

2007-06-05

Perkey, W. B. (Department: 2851)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C353S020000, C353S008000, C353S030000, C353S084000, C349S005000, C349S064000, C349S127000, C349S194000, C349S201000

Reexamination Certificate

active

11330771

ABSTRACT:
Provided are several apparatus and methods to attenuate illumination light in a projector. Illumination light may be attenuated by directing polarized light toward a liquid crystal (LC) attenuation panel. The panel selectively modulates some, all, or none of the polarized light passing through. The light from the panel is then directed toward a polarization device. The polarization device analyzes the polarized light, and allows or denies the light to pass therethrough based on the polarization of the light.

REFERENCES:
patent: 5098184 (1992-03-01), van den Brandt et al.
patent: 5625495 (1997-04-01), Moskovich
patent: 5754571 (1998-05-01), Endoh et al.
patent: 5924783 (1999-07-01), Jones
patent: 6631997 (2003-10-01), Miyata et al.
patent: 6755538 (2004-06-01), Sugawara
patent: 6769777 (2004-08-01), Dubin et al.
patent: 6819064 (2004-11-01), Nakanishi
patent: 6857751 (2005-02-01), Penn et al.
patent: 6877865 (2005-04-01), English, Jr. et al.
patent: 6924923 (2005-08-01), Serati
International search report and written opinion for corresponding PCT application No. PCT/US06/01175, Jan. 25, 2007.

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