Prismatic light beam homogenizer for projection displays

Details Prismatic light beam homogenizer for projection displays Prismatic light beam homogenizer for projection displays

1997-04-22

2000-02-15

Dowling, William

Optics: image projectors

Unitary plural refracting surfaces

353 81, 359834, G03B 2114, G02B 504

Patent

active

060244526

ABSTRACT:
A device for homogenizing light rays from a light source. The device includes a first multi-prismatic surface, a second multi-prismatic surface, and a reflective housing connecting the first multi-prismatic surface with the second multi-prismatic surface. The device may be employed in a liquid crystal display projection system. The system includes, in addition to the device, a parabolic reflective collimator, a lamp centered in the parabolic reflective collimator, the lamp emitting light rays reflected by the parabolic reflective collimator, and a liquid crystal display positioned to receive light rays passing through the first multi-prismatic surface, the reflective housing, and the second multi-prismatic surface.

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