Rear projection screen

Details Rear projection screen Rear projection screen

1986-10-30

1987-11-24

Wintercorn, Richard A.

Optics: image projectors

Plural projection paths with single light source

353 77, G03B 2160, G03B 2122, G03B 2128

Patent

active

047084359

ABSTRACT:
A rear projection screen is provided for observing an image by introducing light from the rear side of the screen at a sharp angle. The screen has a plane of incidence which comprises a plurality of prisms extending in lines or arcs. Each prism has a total reflection surface which totally reflects incident light so that the light emerges toward an observer and a surface opposite to the total reflection surface, and toward the total reflection surface and/or the opposite surface having a curved surface so that the luminous flux of the totally reflected light is once converged and is then diffused.

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