Illumination apparatus and video projection display system

Details Illumination apparatus and video projection display system Illumination apparatus and video projection display system

2007-12-04

2007-12-04

Koval, Melissa Jan (Department: 2862)

Optics: image projectors

Particular condenser

C353S094000, C353S099000, C359S649000, C362S227000, C362S331000

Reexamination Certificate

active

11088722

ABSTRACT:
An illumination apparatus includes: a group of light source segments; a group of condenser lenses arrayed as opposed to the group of light source segments, and a group of rectangular lens elements arrayed as opposed to the group of condenser lenses for converging a light ray transmitted through the opposing condenser lens; and an illumination optical system for guiding the rays to an illumination plane. The lens elements have a shape of a rectangle and are arrayed in a rectangular effective area in such a way that a longitudinal axis of each lens elements intersects an axis passing a side of the effective area at 45°.

REFERENCES:
patent: 5662401 (1997-09-01), Shimizu et al.
patent: 6921176 (2005-07-01), Tomita et al.
patent: 7070281 (2006-07-01), Kato
patent: 7101050 (2006-09-01), Magarill et al.
patent: 10-123512 (1998-05-01), None

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