Plastic photochromic lenses for glasses and process for...

Details Plastic photochromic lenses for glasses and process for... Plastic photochromic lenses for glasses and process for...

2005-07-05

2005-07-05

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S163000

Reexamination Certificate

active

06913357

ABSTRACT:
A method of manufacturing plastic photochromic lenses includes obtaining a lens by polymerizing and curing a monomer mixture. The monomer mixture includes one of monofunctional and bifunctional methacrylic ester monomers, a trifunctional methacrylic ester monomer and a photochromic dye. Then, radiation including ultraviolet radiation is directed onto a surface of the lens obtained so that the radiation activates the surface of the lens to break down macromolecular chains of the surface of the lens. A composition including an organic silicon compound and a colloidal metal oxide is coated onto the surface of the lens exposed to the radiation. The composition coated is cured to obtain a hard surface film.

REFERENCES:
patent: 5621017 (1997-04-01), Kobayakawa et al.
patent: 5914174 (1999-06-01), Gupta et al.
patent: 6166855 (2000-12-01), Ikeyama et al.
patent: 6602603 (2003-08-01), Welch et al.
patent: 6646104 (2003-11-01), Mori et al.
patent: 5-34649 (1993-02-01), None
patent: 10-338869 (1998-12-01), None
patent: 11-170387 (1999-06-01), None
Shinichiro Kadowaki, Machine Translation of Japanese document 5-34649, Japanese Patent 3073556 published Feb. 6, 2000.

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