Phototropic glass with a refractive index of at least 1.59

Details Phototropic glass with a refractive index of at least 1.59 Phototropic glass with a refractive index of at least 1.59

1983-12-08

1984-12-04

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C03C 326, C03C 308, C03C 310

Patent

active

044865414

ABSTRACT:
A phototropic glass with an optical position n.sub.d .ltoreq.1.59 and v.sub.d .gtoreq.40 and with a density of .ltoreq.3.2 g/cm.sup.3 is described for the first time. Its composition lies within the system of

REFERENCES:
patent: 3630765 (1974-12-01), Araujo
patent: 3923529 (1975-12-01), Araujo et al.
patent: 4018965 (1977-04-01), Kerko et al.
patent: 4149896 (1979-04-01), Faulstich et al.
patent: 4190451 (1980-02-01), Hares et al.
patent: 4251278 (1981-02-01), Hares

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