Acidproof, hydrolysis-resistant optical and ophthalmic glass of

Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...

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501 75, 501 76, 501 78, 501 79, 501901, 501903, C03C 308, C03C 310

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043906389

ABSTRACT:
An optical and ophthalmic glass having an index of refraction of .gtoreq.1.69, an Abbe number of .gtoreq.37, and a density of .ltoreq.3.30 g/cm.sup.3, consists essentially of (in % by weight):

REFERENCES:
patent: 3877953 (1975-04-01), Broemer et al.
patent: 3898093 (1975-08-01), Faulstich et al.
patent: 4055435 (1977-10-01), Sagara
patent: 4057435 (1977-11-01), Boudot et al.
patent: 4084978 (1978-04-01), Sagara
patent: 4194916 (1980-03-01), Kumata et al.

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