Photochromatic gradient lens having two colortones and process f

Details Photochromatic gradient lens having two colortones and process f Photochromatic gradient lens having two colortones and process f

1985-11-29

1988-12-27

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

65 3011, 351165, 351177, G02C 710

Patent

active

047944358

ABSTRACT:
An tinted eyeglass lens having a photochromic gradient and a process for producing the same are disclosed. The photochromic gradient is provided by changing the particle diameter of silver halide particles in the face direction of the glass.

REFERENCES:
patent: 2675740 (1954-04-01), Barkley
patent: 4018965 (1977-04-01), Kerko et al.
patent: 4043781 (1977-08-01), DeMunn et al.
patent: 4080051 (1978-03-01), Krohn et al.
patent: 4251278 (1981-02-01), Hares

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