Glasses for ophthalmic applications

Details Glasses for ophthalmic applications Glasses for ophthalmic applications

1984-07-12

1986-01-21

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 66, 501 67, 501903, C03C 311, C03C 3091, C03C 3093, C03C 400

Patent

active

045657912

ABSTRACT:
This invention is concerned with the production of glasses suitable for ophthalmic applications having refractive indices of 1.523.+-.0.004, Abbe number between 51-59, densities less than 2.43 g/cm.sup.3, transmissions at 400 nm in 2 mm thickness greater than 89%, and a UV cutoff between 310-335 nm, said glasses consisting essentially, in weight percent on the oxide basis, of:

REFERENCES:
patent: 3951671 (1976-04-01), Parry et al.
patent: 3998647 (1976-12-01), Yamashita et al.
patent: 4001019 (1977-01-01), Yamashita et al.
patent: 4367012 (1983-01-01), Ikeda et al.

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