Fast fading, high refractive index photochromic glass

Details Fast fading, high refractive index photochromic glass Fast fading, high refractive index photochromic glass

1990-09-13

1991-06-11

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 56, 501903, C03C 406, C03C 311

Patent

active

050232096

ABSTRACT:
This invention is directed to the preparation of silver halide-containing photochromic glasses exhibiting refractive indices between 1.585-1.610, Abbe numbers higher than 41, and densities less than 2.80 g/cm.sup.3 generally consisting essentially, in weight percent, of:

REFERENCES:
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patent: 4190451 (1980-02-01), Hares et al.
patent: 4486541 (1984-12-01), Gliemeroth et al.
patent: 4686196 (1987-08-01), Gliemeroth et al.
patent: 4746633 (1988-05-01), Mazeau et al.
patent: 4757034 (1988-07-01), Prassas
patent: 4891336 (1990-01-01), Prassas

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