Method for molding contact lenses using ultraviolet energy

Details Method for molding contact lenses using ultraviolet energy Method for molding contact lenses using ultraviolet energy

1981-02-27

1983-05-10

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 25, 264337, 425808, B29D 1100

Patent

active

043829023

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.

REFERENCES:
patent: 3171869 (1965-03-01), Weinberg
patent: 3983083 (1976-09-01), Kaetsu et al.
patent: 4073577 (1978-02-01), Hofer
patent: 4113224 (1978-09-01), Clark et al.
patent: 4166088 (1979-08-01), Neefe
patent: 4209289 (1980-06-01), Newcomb et al.

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