Optical glass of negative anomalous partial dispersion in the bl

Details Optical glass of negative anomalous partial dispersion in the bl Optical glass of negative anomalous partial dispersion in the bl

1991-01-16

1992-08-11

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 75, 501 76, 501901, 501903, C03C 3072, C03C 3074, C03C 3155, C03C 400

Patent

active

051378507

ABSTRACT:
A chemically resistant glass which can be produced at relatively low melting temperatures and has anomalous negative partial dispersion P.sub.g,F, a refractive index n.sub.d of from 1.73 to 1.83 and an Abbe coefficient v.sub.d of from 31 to 38 preferably contains (in % by weight, based on oxides):

REFERENCES:
patent: 3929495 (1975-12-01), Broemer et al.
patent: 3958999 (1976-05-01), Izumitani et al.

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