Photochromic plastic lens and its method of manufacture

Details Photochromic plastic lens and its method of manufacture Photochromic plastic lens and its method of manufacture

1997-04-11

1999-06-22

Lusignan, Michael

Stock material or miscellaneous articles

Composite

Of silicon containing

427164, 4272556, 4272557, 427578, 428515, B32B 1312

Patent

active

059141930

ABSTRACT:
The invention provides a commercially feasible method of manufacturing a photochromic lens on a large scale. The method involves vacuum depositing a photochromic material onto a surface of a plastic lens to form a photchromic depositied lens, and heating the photochromic deposited lens for a time and at a temperature sufficient to allow the photochromic material to permeate the lens.

REFERENCES:
patent: 5094691 (1992-03-01), Watanabe et al.
patent: 5496641 (1996-03-01), Mase et al.
patent: 5624757 (1997-04-01), Smith
patent: 5643423 (1997-07-01), Kimock et al.

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