Optical projection system

Details Optical projection system Optical projection system

1995-03-08

1996-10-01

Dowling, William C.

Optics: image projectors

Composite projected image

Reflector between lamp and screen

353 99, 353 31, 353 34, 348771, G03B 2128

Patent

active

055606970

ABSTRACT:
An optical projection system comprises a non-point white light source, a source lens, a source stopper, an optical means, a first, a second and a third arrays of M.times.N actuated mirrors, a beam splitting means including a first and a second dichroic lens, a first, a second and a third field lenses, a projection stopper, a projection lens and a projection screen. Each of the field lenses is located between each of the dichroic mirrors and each of the arrays of actuated mirrors and is used for collimating each of the primary light beams onto the corresponding array of actuated mirrors and refocussing each of the reflected primary light beams from the via the beam splitting means, and the optical means, and eventually onto the projection stopper.

REFERENCES:
patent: 5170250 (1992-12-01), Ledebuhr
patent: 5235444 (1993-08-01), de Vaan
patent: 5245369 (1993-09-01), Um et al.
patent: 5260798 (1993-11-01), Um et al.
patent: 5369433 (1994-11-01), Baldwin et al.
patent: 5402184 (1995-03-01), O'Grady et al.
patent: 5420655 (1995-05-01), Shimizu
patent: 5486881 (1996-01-01), Hwang

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