Optical glass

Details Optical glass Optical glass

1986-02-21

1988-03-22

Capella, Steven

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 49, 501 50, 501 51, 501 52, 501 74, 501 78, 501 41, 501900, C03C 3253, C03C 315

Patent

active

047328754

ABSTRACT:
To tellurite optical glass comprising TeO.sub.2, high valence components are added and may be a combination of La.sub.2 O.sub.3, at least one of B.sub.2 O.sub.3 and GeO.sub.2, and at least one of Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.5. The high valence components may include Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, and Yb.sub.2 O.sub.3. Amounts of TeO.sub.2 and La.sub.2 O.sub.3 are restricted to ranges between 10% and 80% and between 5% and 35%, respectively. A sum of B.sub.2 O.sub.3 and GeO.sub.2 must fall within a range between 1% and 30%, with an amount of GeO.sub.2 restricted between 0% and 22%. A total of La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, and Yb.sub.2 O.sub.3 must be between 5% and 50%. A sum of Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 should range from 1% to 26%, with individual amounts of Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 kept between 0% and 20% and between 0% and 26%, respectively.

REFERENCES:
patent: 3690908 (1972-09-01), Greco et al.
patent: 3826661 (1974-07-01), Greco et al.
patent: 3883357 (1975-05-01), Cooley
patent: 3914129 (1975-10-01), Wylot

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