Method and apparatus for making a plastic lens

Details Method and apparatus for making a plastic lens Method and apparatus for making a plastic lens

1986-01-28

1988-03-01

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

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

264 22, 264 25, 264 22, 4251744, 425808, B29D 1100

Patent

active

047284692

ABSTRACT:
A method and apparatus for making a plastic lens and a plastic lens made thereby are provided, the method comprising the steps of disposing a lens forming material comprising a liquid monomer and a photosensitive initiator into a mold cavity defined in part between a pair of spaced apart mold members each having a lens forming surface facing the cavity and an outer opposed surface, directing rays of ultraviolet light from a source thereof against the outer surface of at least one of the mold members so as to pass therethrough to act on the lens forming material in the cavity to produce the lens therefrom, and forming the outer surface of the one mold member with structure to cause the ultraviolet light directed thereagainst to be substantially evenly distributed throughout the lens forming material in the cavity in order to tend to prevent optical distortions in the lens being formed therefrom.

REFERENCES:
patent: 2524862 (1950-10-01), White
patent: 2525664 (1950-10-01), Gadsby et al.
patent: 3605195 (1971-09-01), Campbell
patent: 4166088 (1979-08-01), Neefe
patent: 4197266 (1980-04-01), Clark et al.
patent: 4298005 (1981-11-01), Mutzhat
patent: 4382902 (1983-05-01), Feurer

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