Optical projection devices including a lens plate integrator

Details Optical projection devices including a lens plate integrator Optical projection devices including a lens plate integrator

1997-06-19

1999-12-07

Dowling, William

Optics: image projectors

Unitary plural refracting surfaces

362333, G03B 2114

Patent

active

059971436

ABSTRACT:
A lens plate integrator includes first and second lens plates which transmit light from a light source on an optical path to a projection plane. Each lens plate includes corresponding first and second groups of lens elements; light from the first group of the second plate is focused on a projection face in the projection plane, while light from the second group of the second plate is focused in front of or behind the projection plane and only partially illuminates the projection face.

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patent: 5418583 (1995-05-01), Masumoto
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patent: 5786939 (1998-07-01), Watanabe
patent: 5806950 (1998-09-01), Gale et al.
patent: 5865521 (1999-02-01), Hashizume et al.

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