Methods and devices to control polymerization
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 7, 2004
Grant Date -
Jan 3, 2002
app pub date -
Mar 27, 2001
filing date -
Mar 31, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and mold assembly to control the polymerization of a molded article. In one embodiment, an amorphous posterior mold comprising a non-critical surface having a controlled radius of curvature is used to produce molded articles. In an alternate embodiment, ophthalmic lenses are produced using a posterior mold in which the concave surface of the non-critical surface is filled with a liquid having a similar refractive index as the mold material. In still another embodiment, a positive lens is placed at a predetermined distance adjacent to the mold assembly to alter the irradiation path to the mold assembly. In still another embodiment, a positive lens is placed within the concave surface of the posterior lens.
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