Photochromic comfort glasses

Details Photochromic comfort glasses Photochromic comfort glasses

1984-09-13

1985-10-29

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 66, 501 56, 501 77, 501 67, C03C 326, C03C 308

Patent

active

045500878

ABSTRACT:
This invention is directed to the preparation of haze-free photochromic glasses which darken to a comfort range, i.e., a luminous transmittance of about 40-60%, which exhibit very rapid fading, and which demonstrate excellent temperature dependence. The glasses consist essentially, in weight percent with the levels of Ag, Cu.sub.2 0, C1, and Br representing values as analyzed in the glass, of:

REFERENCES:
patent: 3208860 (1962-07-01), Armistead et al.
patent: 4018965 (1977-04-01), Kerko et al.
patent: 4102693 (1978-07-01), Owen et al.
patent: 4190451 (1980-02-01), Hares et al.
patent: 4407966 (1983-10-01), Kerko et al.
patent: 4485178 (1984-11-01), Gliemeroth et al.
patent: 4486541 (1984-12-01), Gliemeroth et al.

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