Anamorphic wide angle safety lens

Details Anamorphic wide angle safety lens Anamorphic wide angle safety lens

1988-08-08

1990-01-30

Arnold, Bruce Y.

350433, G02B 308

Patent

active

048969532

ABSTRACT:
In the present invention a wide angle safety lens has two major surfaces, each of which is a structured surface. The first major surface has a plurality of parallel linear prisms forming a Fresnel lens that acts like a cylindrical lens having a first negative focal length. The second major surface has a plurality of parallel linear prisms running perpendicular to the prisms of the first major surface and forming a Fresnel lens that acts like a cylindrical lens having a second negative focal length.

REFERENCES:
patent: 2303113 (1942-11-01), Eckel
patent: 4385808 (1983-05-01), Vanderwerf
3M Visual Products Quotation No. JA-400-L, dated Jan. 27, 1977, pp. 1-3.
Brochure on Blind Area Viewer published by M. B. Associates, pp. 1-4.
Copy of engineering drawing of M. B. Associates lens.

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