Glass for eye glass lens

Details Glass for eye glass lens Glass for eye glass lens

1984-04-26

1986-09-16

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 45, 501 46, 501 47, 501 49, 501 52, 501 77, 501 78, 501 79, 501901, 501903, C03C 400, C03C 3064, C03C 3068, C03C 3155

Patent

active

046122958

ABSTRACT:
A glass for an eye glass lens comprising a SiO.sub.2 (or B.sub.2 O.sub.3)-CaO-Nb.sub.2 O.sub.5 system as a basic system and having a refractive index of 1.79 or more, an Abbe number of 32 to 38 and a specific gravity of less than 3.6 is disclosed.

REFERENCES:
patent: 3958999 (1976-05-01), Izumitani et al.
patent: 4055435 (1977-10-01), Sagara
patent: 4166746 (1979-09-01), Ishibashi et al.
patent: 4400473 (1983-08-01), Mennemann et al.

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