Optical glass having a negative anomalous dispersion

Details Optical glass having a negative anomalous dispersion Optical glass having a negative anomalous dispersion

1997-10-06

1999-01-12

Bonner, Melissa

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 78, 501 79, 501903, C03C 400, C03C 3064, C03C 3066, C03C 3068

Patent

active

058588981

ABSTRACT:
An optical glass having optical constants of refractive index within the range of 1.55-1.75 and Abbe number (.nu. d) within the range of 25-51 and having large negative anomalous dispersion which is substantially free of lead and arsenic compounds includes as its essential ingredients in weigth percent 10->40% SiO.sub.2, 12.5-35% B.sub.2 O.sub.3, 3-20% ZrO.sub.2 and 6-30% Nb.sub.2 O.sub.5.

REFERENCES:
patent: 3460954 (1969-08-01), Young et al.
patent: 4055435 (1977-10-01), Sagara
patent: 4084978 (1978-04-01), Sagara
patent: 4390638 (1983-06-01), Mennemann et al.
patent: 5104831 (1992-04-01), Behr et al.

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