Spectacle glass with increased refractive index

Details Spectacle glass with increased refractive index Spectacle glass with increased refractive index

1983-02-10

1985-04-02

Williams, Howard S.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 77, 501 79, 501903, C03C 304, C03C 302, C03C 316

Patent

active

045088349

ABSTRACT:
A spectacle glass which is colorless in the visible spectrum range, not transmissive in the ultraviolet spectrum range below 350 nm, has a refractive index n.sub.d higher than 1.56 and an Abbe number of more than 45, and which has an extremely low density, has the following composition (in % by weight):

REFERENCES:
patent: 3876436 (1975-04-01), Lythgoe
patent: 3898093 (1975-08-01), Faulstich et al.
patent: 4088501 (1978-05-01), Ellis et al.
patent: 4102693 (1978-07-01), Owen et al.
patent: 4304584 (1981-12-01), Borrelli et al.

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