Optical and ophthalmic glasses

Details Optical and ophthalmic glasses Optical and ophthalmic glasses

1986-06-20

1988-05-03

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 79, 501901, 501903, C03C 400, C03C 3068, C03C 3066

Patent

active

047420286

ABSTRACT:
This invention is concerned with a glass for optical and/or ophthalmic applications having an index of refraction between about 1.78-1.82, an Abbe number greater or equal to 31, and a density less than about 3.80 g/cm.sup.3 consisting essentially, expressed in terms of weight percent on the oxide basis, of:

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patent: 4055435 (1977-10-01), Sagara
patent: 4057435 (1977-11-01), Boudot et al.
patent: 4084978 (1978-04-01), Sagara
patent: 4213786 (1980-07-01), Faulstich et al.
patent: 4390638 (1983-06-01), Mennemann et al.
patent: 4400473 (1983-08-01), Mennemann et al.
patent: 4404290 (1983-09-01), Boudot
patent: 4481299 (1984-11-01), Tajima

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