Glasses of low density and high index of refraction for ophthalm

Details Glasses of low density and high index of refraction for ophthalm Glasses of low density and high index of refraction for ophthalm

1984-07-30

1985-09-10

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 64, 501 66, 501 67, 501903, C03C 308

Patent

active

045406723

ABSTRACT:
This invention relates to glasses especially suitable for optical and ophthalmic applications which exhibit densities less than about 2.65 g/cm.sup.3, refractive indices between about 1.595-1.607, and Abbe numbers between about 40-47, and which consist essentially, in weight percent on the oxide basis, of

REFERENCES:
patent: 2523265 (1950-09-01), Armistead
patent: 2699399 (1955-01-01), Armistead
patent: 4438211 (1984-03-01), Mennemann et al.

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