1985-08-12
1986-08-19
Wintercorn, Richard A.
350167, G03B 2160
Patent
active
046066098
ABSTRACT:
The projection screen includes a plurality of optical unit cells arranged together to form a display surface of the screen. The optical units cells that are constituents of the projection screen each include an elongated body portion formed of a light transmissive, preferably transparent material. One end of the body portion is formed as a convex lens surface, and an opposite end is formed with a spherical surface contour, preferably a concave surface contour. A light diffusing material is provided at the axial portion of the convex lens surface and a light reflecting material is provided at the axial portion of the spherical concave surface, with the light reflecting material having a reflecting surface directed toward the convex lens surface. The axial distance between the convex lens surface and the reflecting material is less than the focal distance of the convex lens such that light passing through the convex lens surface converges toward the focal point beyond the reflecting material and is reflected by the reflecting material, before reaching the focal point, through the light diffusing material on the convex lens.
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patent: 4298246 (1981-11-01), Iwamura
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