Method of fabrication of a Fresnel lens

Details Method of fabrication of a Fresnel lens Method of fabrication of a Fresnel lens

1978-05-30

1979-10-09

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264102, 264259, B29D 1100

Patent

active

041706161

ABSTRACT:
A method for fabricating a Fresnel lens comprising a plastic layer contacted to a transparent substrate by evacuating a chamber formed by the lens mold and the substrate through a pumping tube; flowing a liquid plastic through the pumping tube into the chamber; and venting the pumping tube to the atmosphere so that atmospheric pressure forces the plastic to fill the entire chamber.

REFERENCES:
patent: 2831394 (1958-04-01), Heenan et al.
patent: 3247550 (1966-04-01), Haines, Jr.
patent: 3361858 (1968-01-01), Wichterle
patent: 3739455 (1973-06-01), Alvarez
patent: 4039607 (1977-08-01), Miller

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