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Rear projection screen

  • US 4,509,823 A
  • Filed: 10/12/1983
  • Issued: 04/09/1985
  • Est. Priority Date: 10/15/1982
  • Status: Expired due to Term
First Claim
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1. A rear projection screen of the type comprising a circular Fresnel lens consisting of a plurality of concentrically circular lens elements and a lenticular lens means having a plurality of corrugated parallel convex lens elements formed over one surface thereof, the other surface of said lenticular lens means being formed with a plurality of parallel projections or protrusions extended in the longitudinal direction of said lenticular lens elements, masking stripes being formed over said parallel projections or protrusions, the improvement wherein the side surfaces of each of said parallel projections or protrusions are so cut that they will not intercept the light rays emerging from said corrugated parallel convex lens elements of said lenticular lens means.

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