Low dispersion infrared glass

Details Low dispersion infrared glass Low dispersion infrared glass

1982-07-06

1985-01-08

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501904, C03C 312, C03C 330

Patent

active

044927630

ABSTRACT:
The present invention teaches infrared chalcogenide glass compositions having very low dispersion in the eight to twelve micron range, which are formed as III-V-VI-VII compositions, e.g. 14% (atomic) gallium plus 25% antimony plus 40% selenium plus 21% bromine. The introduction of a group VII component into a chalcogenide glass provides low dispersion, and the group III component compensates for the strong devitrification tendencies of the group VII component and maintains the mechanical properties of the glass.

REFERENCES:
patent: 3117013 (1964-01-01), Northover et al.
patent: 3177082 (1965-04-01), MacAvoy
patent: 3241009 (1966-03-01), Dewald et al.
patent: 3312922 (1967-04-01), Eubank et al.
patent: 3312923 (1967-04-01), Eubank
patent: 3312924 (1967-04-01), Eubank et al.
patent: 3317732 (1967-05-01), Deeg
patent: 3596136 (1971-07-01), Fischer

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