Optical glass having a low specific gravity

Details Optical glass having a low specific gravity Optical glass having a low specific gravity

1997-05-13

2000-10-03

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 48, 501903, C03C 321

Patent

active

061272973

ABSTRACT:
In optical glass, P.sub.2 O.sub.5, TiO.sub.2, and Li.sub.2 O are included as essential components together with at least one divalent component, such as ZnO, MgO, and CaO. Such essential component are mixed together to accomplish a sag point not higher than 450.degree. C. and a specific gravity not heavier than 3.0. The optical glass also has water durability not greater than 0.3.

REFERENCES:
patent: 3836375 (1974-09-01), Broemer et al.
patent: 3923527 (1975-12-01), Matsuura et al.
patent: 4391915 (1983-07-01), Meden-Piesslinger et al.
patent: 4476233 (1984-10-01), Kodama

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