Rear-projection screen

Details Rear-projection screen Rear-projection screen

1989-05-10

1990-05-08

Wintercorn, Richard A.

G03B 2160

Patent

active

049232800

ABSTRACT:
A transparent rear-projection screen, e.g. for video projection, consisting of three screen elements, of which the rearmost element, which faces the light sources, is a Fresnel lense, and the middle element on its reverse or entrance side is provided with lens profiles for horizontal diffusion of the light, and on its front or exit side are lenses for parallelling the light from various light sources, and in which screen the foremost, visually enhanced screen element has on its reverse or entrance side horizontal, convex, rectilinear lenses, the focal point of which is congruent to the tops of projections provided on the front or exit side of the foremost screen element, and from the surface of which the light is emitted.

REFERENCES:
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patent: 4509822 (1985-04-01), Clausen et al.
patent: 4509823 (1985-04-01), Moriguchi et al.
patent: 4561720 (1985-12-01), Clausen et al.

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