Method for molding contact lenses using ultraviolet energy
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United States of America Patent
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-
May 10, 1983
Grant Date -
N/A
app pub date -
Feb 27, 1981
filing date -
Feb 28, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a fabrication process for molding a contact lens evincing the required optical properties. This method consists in designing a mold (1,2) with a high thermal inertia, transparent to, or little absorbing electromagnetic waves with wavelengths between 1 micron and 10.sup.-6 microns, in developing a base composition from polymerizing double-bond monomers which are absorbing with respect to these waves and in securing the polymerization of the composition inside the closed mold by irradiating with the above-cited electromagnetic waves at a power density such as to keep the temperature approximately less than 40.degree. C. at the mold level.
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