Method for producing selectively tinted photochromic glass lens

Details Method for producing selectively tinted photochromic glass lens Method for producing selectively tinted photochromic glass lens

1979-11-19

1981-03-31

Kellogg, Arthur D.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

Surface modified glass

65 30R, 65 31, 65 33, 65DIG2, 106 52, 106 53, 106DIG6, 428913, 106 54, C03C 2300

Patent

active

042594065

ABSTRACT:
Selectively tinted photochromic glass lenses, such as photochromic lenses with a fixed tint gradient in transmittance ranging from a dark tint at the top of the lens to pale or no tinting at the bottom of the lens, are provided by a process comprising surface coloration and subsequent selective colored surface layer removal, without introducing optical aberrations into the lenses.

REFERENCES:
patent: 3892582 (1974-02-01), Simms
patent: 3920463 (1975-11-01), Simms
patent: 4036624 (1977-07-01), Krohn et al.
patent: 4072490 (1978-02-01), Illig
patent: 4118214 (1978-10-01), Wedding
patent: 4160655 (1979-07-01), Kingsbury et al.

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