Illuminating device for large screen

Details Illuminating device for large screen Illuminating device for large screen

1980-11-21

1982-05-18

Walsh, Donald P.

Illumination

Plural light sources

With modifier

362 97, 362217, 340763, 340765, 340783, 340784, 350345, F21V 500

Patent

active

043308139

ABSTRACT:
Illuminating device for a large screen making it possible to uniformly illuminate said screen by means of a light arriving at a low angle of incidence .theta., wherein it comprises n.p light sources and n.p optical focusing elements in matrix form, as well as means for ensuring that the light beams from each source do not encounter the optical elements associated with the other sources.

REFERENCES:
patent: 3840695 (1974-10-01), Fischer
patent: 3869195 (1975-03-01), Aldrich
patent: 4257041 (1981-03-01), Masucci
patent: 4263594 (1981-04-01), Masucci

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