Projection system

Details Projection system Projection system

1990-01-12

1991-01-08

Cuchlinski, Jr., William A.

Optics: image projectors

Composite projected image

353 31, 353 33, 353 34, 353 37, 358 60, G03B 2100, G02F 113

Patent

active

049830325

ABSTRACT:
A projection system comprises a plurality of reflective LCDs (41, 42, 43) which are irradiated with colored sub-beams (21, 22, 23). The sub-beams are not perpendicularly incident on the LCDs so that the reflected beams (24, 25, 26) do not coincide with the incident beams. The sub-beams originate from a white light beam (20) which is split up into colored sub-beams by means of color-selective mirrors (31, 33). The same mirrors are used to combine the reflected beams (24, 25, 26) to a projection beam (27). An angle-dependent beam separater (80) is arranged so as to realize a spatial separation between the incident beams and the reflected beam. The angle-dependent beam separater (80) is arranged in such a way that the angle at which the beam (20) is incident on the color-selective mirrors (31, 33) is equal to the angle at which the reflected sub-beams (24, 25, 26) are incident on these mirrors.

REFERENCES:
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4464019 (1984-08-01), Gagnou
patent: 4749259 (1988-06-01), Ledebuhr
patent: 4836649 (1989-06-01), Ledebuhr et al.
patent: 4850685 (1989-07-01), Kamakura et al.
patent: 4913528 (1990-04-01), Hasegawa
IBM Technical Disclosure Bulletin, vol. 22, No. 2 (Jul. 1979), pp. 820-821.

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