Projector with multiple lamp light source

Details Projector with multiple lamp light source Projector with multiple lamp light source

1994-11-23

1996-04-02

Dowling, William C.

Optics: image projectors

Unitary plural refracting surfaces

353 63, 353DIG3, 362241, G03B 2128

Patent

active

055045448

ABSTRACT:
A projection system is described which efficiently combines the output from multiple lamps, images of which are focused to a common point. The projected screen brightness is multiplied over that of a conventional single lamp of equivalent wattage. The screen brightness can be increased or diminished by switching individual lamps on or off, adjusting the light level for conventional overhead transparencies, or low transmission liquid crystal display projection panels.

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