Optical glass composition

Details Optical glass composition Optical glass composition

Filed on

1990-03-02

Date issued

1991-03-12

Examiner

Bell, Mark L.

Patent Class

Compositions: ceramic

SubClass

Ceramic compositions

SubSubClass

Glass compositions, compositions containing glass other than...

Other Related Categories

C03L 3253

Type

Patent

Status

active

Patent number

049993216

Description

ABSTRACT:
A durable, optically isotropic glass composition which contains 50-75 percent of germania, 10-25 percent of alumina and/or gallia, and 10-25 percent of terbium oxide and/or dysprosium oxide and/or gadolinium oxide.

REFERENCES:
patent: 3745032 (1973-07-01), Miller et al.
patent: 4771020 (1986-09-01), Omata

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