Methods for eyeglass lens curing using ultraviolet light
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United States of America Patent
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-
Feb 8, 2000
Grant Date -
N/A
app pub date -
Apr 19, 1996
filing date -
Apr 19, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Method and apparatus for making [and coating] a plastic lens is provided. [Oxygen barrier containing photoinitiator is used to cure incompletely cured lens portions. Radiation pulses are used to control lens curing rate. Lens is postcured while in a mold cavity using a conductive heat source.] More particularly, the invention relates to applying alternating periods of ultraviolet light to lens forming composition. Such composition is cured while controlling the rate of heat generation and/or dissipation via manipulation of the duration of the radiation or the cooling in the curing chamber. The ultraviolet light is directed toward the lens forming composition which is preferably disposed in a mold cavity formed by two mold members. The ultraviolet light may be directed in pulses or continuously.
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