Optical glass

Details Optical glass Optical glass

2006-06-13

2006-06-13

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S046000, C501S047000, C501S048000, C501S901000, C501S903000

Reexamination Certificate

active

07060640

ABSTRACT:
An optical glass comprises, in mass percent, 15–35% of P2O5, 40–60% of Nb2O5, 0.5% to less than 15% of Na2O and 3% to less than 25% of BaO, has a ratio in mass % of (BaO+Nb2O5)/{(TiO2+WO3)×3+Bi2O3+Nb2O5}>1.0; is free of Pb and As; and has a refractive index (nd) within a range from 1.78 to 1.90 and an Abbe number (νd) within a range from 18 to 27.

REFERENCES:
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patent: 6333282 (2001-12-01), Nakahata et al.
patent: 6786064 (2004-09-01), Hayashi et al.
patent: 2002/0042337 (2002-04-01), Zou et al.
patent: 2002/0073735 (2002-06-01), Hayashi et al.
patent: 2004/0266602 (2004-12-01), Fujiwara et al.
patent: 10316448 (1998-12-01), None
patent: 2003238197 (2003-08-01), None
patent: 614040 (1978-06-01), None
Derwent-ACC-NO.: 1999-076322, Derwent Abstract of JP 10316448 A.
Derwent-ACC-NO.: 2003-737419, Derwent Abstract of JP 2003238197 A.
Derwent-ACC-NO.: 1979-38318B, Derwent Abstract of JP 2003238197 A.
EPO Search Report.

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