Refractive index-corrected copper-cadmium halide photochromic gl

Details Refractive index-corrected copper-cadmium halide photochromic gl Refractive index-corrected copper-cadmium halide photochromic gl

1977-12-16

1979-09-04

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

65 30E, 65 33, 65DIG2, 106 54, 106DIG6, 252300, 428218, 428410, C03C 308, C03C 326

Patent

active

041667450

ABSTRACT:
Alkali boroaluminosilicate glass compositions providing refractive index-corrected copper-cadmium halide photochromic glasses of optical quality, particularly useful for making ophthalmic lenses, are described. Ion-exchange-strengthenable glasses exhibiting good chemical durability and a satisfactory liquidus-viscosity relationship in combination with good photochromic properties and the required refractive index are also provided.

REFERENCES:
patent: 3954485 (1976-05-01), Seward et al.
patent: 3957499 (1976-05-01), DeMunn et al.
patent: 4036624 (1977-07-01), Krohn et al.
patent: 4076544 (1978-02-01), Kerko et al.

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