Projector device

Details Projector device Projector device

2006-07-18

2011-10-18

Dowling, William C (Department: 2878)

Optics: image projectors

Polarizer or interference filter

C349S009000

Reexamination Certificate

active

08038298

ABSTRACT:
A liquid crystal projector device of the present invention includes an optical system for receiving light from a lamp unit. The optical system is provided with a polarization beam splitter for extracting only an S wave out of P and S waves of the light emitted from the lamp unit, and also provided with a latter stage slit plate in contact with a light incidence surface of the polarization beam splitter. The latter stage slit plate is provided with a plurality of slits for allowing light incidence on the polarization beam splitter. A former stage slit plate is arranged in a position spaced apart from the latter stage slit plate along the optical axis toward the lamp unit. The former stage slit plate is provided with a plurality of slits overlapping in the optical axis direction with the respective slits of the latter stage slit plate.

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Machine translation (English) of JP 2004-226869.
Japanese Office Action dated May 7, 2008, issued in corresponding Japanese Patent Application No. 2005-209287.
Japanese Office Action dated Jul. 15, 2008, issued in corresponding Japanese Patent Application No. 2005-209287.
Japanese Office Action dated Sep. 16, 2008 issued in corresponding Japanese Application No. 2005-209287.

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