Illumination system for a projection system

Details Illumination system for a projection system Illumination system for a projection system

2005-04-12

2005-04-12

Husar, Stephen (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S310000, C362S268000, C362S309000, C362S331000, C362S521000, C362S298000, C362S299000, C359S463000, C359S599000

Reexamination Certificate

active

06877882

ABSTRACT:
An illumination system for illuminating an object includes a light source and a lens array system. The light source includes an illumination element emitting light rays and surrounded by a parabolic reflector. The lens array system includes a first lens array plate and a second lens array plate. The first lens array plate includes a matrix of lenslets where, in one embodiment, each lenslet has a shape matching the aspect ratio of the object to be illuminated. The second lens array plate includes a radial pattern of wedge shaped lenslets each corresponding to a lenslet in the first lens array plate. Each wedge shaped lenslet in the second lens array plate has dimensions that are selected to provide a radial and theta collection angles matching the maximum divergence angle of the light source and the maximum divergence angles of the corresponding lenslet in the first lens array plate.

REFERENCES:
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patent: 6048081 (2000-04-01), Richardson
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patent: 6431739 (2002-08-01), Chuang
patent: 6454440 (2002-09-01), Yamamoto
patent: 6464375 (2002-10-01), Wada et al.

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