Method and device for the projection of a color image resulting

Details Method and device for the projection of a color image resulting Method and device for the projection of a color image resulting

1993-09-28

1995-11-07

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359618, 359629, 359636, G02B 2714, G02B 522

Patent

active

054651778

ABSTRACT:
The modulation by optical valves of three beam coming from a main or auxiliary primary beam of depolarized and collimated white light is achieved by means of two secondary beams of white light that are linearly polarized and perpendicular to each other. The undesirable color components are suppressed to constitute the three constituent color beams of the color image. Through the invention, the geometrical and spectral quality of the image is independent of the main or auxiliary primary beam and the image is as powerful as the one obtained by the standard method of projection. The auxiliary image can be used as a back-up or can be adapted to night-time projection.

REFERENCES:
patent: 4256368 (1981-03-01), Task
patent: 4500172 (1985-02-01), Gagnon
patent: 5073830 (1971-12-01), Loucks
patent: 5262898 (1993-11-01), Laduke
patent: 5298986 (1994-03-01), Owada

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