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US 6,673,278 B1Granted
Methods and apparatus for eyeglass lens curing using ultraviolet light and improved cooling
AssigneeQ2100, Inc.
InventorsOmar M. Buazza, Stephen C. Luetke, Galen R. Powers
Life of this patent
Estimating the term…
Abstract
Method and apparatus for making and coating a plastic lens. 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. Air may be directed toward the mold cavity to help remove heat from the lens. An in-mold scratch resistant coating may be formed from two separate material which both contain a photoinitiator.
Claims26
A method of making an eyeglass lens, comprising:
- placing a liquid, polymerizable lens forming composition in a mold cavity, the mold cavity at least partially defined by a mold members, the lens forming composition comprising a photoinitiator;
- directing a plurality of pulses of ultraviolet light having a first intensity toward the lens forming composition to initiate reaction of the lens forming composition, at least one of the pulses having a duration of less than about 10 seconds;
- directing ultraviolet light at a second intensity toward the lens forming composition through the mold member, wherein the second intensity is less than the first intensity.
Dependencies are inferred from the claim text.