Method and apparatus for making a plastic lens
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United States of America Patent
Stats
-
Mar 1, 1988
Grant Date -
N/A
app pub date -
Jan 28, 1986
filing date -
Jan 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Family
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Cited Art Landscape
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