Color projection prism

Details Color projection prism Color projection prism

1997-06-04

2000-07-04

Dowling, William

Optics: image projectors

Composite projected image

Multicolor picture

353 81, 359638, 359834, G03B 2114

Patent

active

060828633

ABSTRACT:
A prism for color dispersion and recombination and a projector incorporating the prism. The prism comprises an aperture for a light beam and the normal to the aperture defines an optic axis. A first surface, intersecting the optic axis, is oriented at a first angle to the optic axis. The first angle is greater than 45.degree.. The first surface disperses the light beam into a first component and an intermediate component. A second surface, intersecting the optic axis, is oriented at a second angle to the optic axis. The second surface disperses the intermediate component of the light beam into a second component and a third component.

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Nagae et al., "Compact Liquid-Crystal Projectors with High Optical Efficiency," SID95 Digest, pp. 223-226 (1995).

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