Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1986-12-17
1989-07-25
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
204 49, 264 19, 264 25, 264 27, 264219, B29D 1100, C25D 312, B29C 3338, B29C 5902
Patent
active
048511641
ABSTRACT:
A focal plate for use in camera and a method of manufacturing the same are disclosed. The focal plate comprises an optical plate, a plurality of lens-like uneven portions regularly formed on the surface of the optical material, and a plurality of fine rugged portions formed on each uneven portion, and is manufactured by forming a pyramid or prism relief on a metal plate through mechanical working, subjecting it to an electro-plating to form a honeycomb pattern composed of hexagonal lens faces containing fine rugged portions therein, and then transferring the honeycomb pattern onto a surface of an optical material.
REFERENCES:
patent: 3839165 (1974-10-01), Strauss et al.
patent: 4421398 (1983-12-01), Suzuki et al.
patent: 4427265 (1984-01-01), Suzuki et al.
patent: 4567123 (1986-01-01), Ohtaka et al.
Adams Bruce L.
Lowe James
Olympus Optical Company Limited
Wilks Van C.
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