Projector optical system and projector apparatus using the same

Details Projector optical system and projector apparatus using the same Projector optical system and projector apparatus using the same

2006-03-07

2006-03-07

Perkey, W. B. (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C353S081000, C348S771000

Reexamination Certificate

active

07008060

ABSTRACT:
In a projector optical system comprising a digital micromirror device for modulating illumination light, a device having a polarization separating surface is provided for separating a luminous flux incident on the digital micromirror device and a luminous flux emitted from the digital micromirror device from each other. A device for rotating a polarization direction is disposed between the polarization separating surface and the digital micromirror device.

REFERENCES:
patent: 5061049 (1991-10-01), Hornbeck
patent: 5535047 (1996-07-01), Hornbeck
patent: 6144420 (2000-11-01), Jung
patent: 6412949 (2002-07-01), Halldorsson
patent: 6582080 (2003-06-01), Gibbon et al.
patent: 6672722 (2004-01-01), O'Connor et al.
patent: 6726332 (2004-04-01), Cannon et al.
patent: 6779893 (2004-08-01), O'Connor et al.
patent: 2002/0033903 (2002-03-01), Sato
patent: 2003/0016335 (2003-01-01), Penn

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