Optical glass, glass material for press molding, and optical element
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United States of America Patent
Stats
-
Aug 16, 2016
Grant Date -
Dec 10, 2015
app pub date -
Dec 26, 2013
filing date -
Dec 27, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided are an optical glass with a high refractive index which has excellent devitrification resistance both in a molten state and during reheating, and a glass material for press molding and an optical element which are comprised of the optical glass. This optical glass includes, in mass %, 15-37% of B2O3 and SiO2 in total, 15-45% of TiO2, Nb2O5 and ZrO2 in total, and 12-40% of BaO, SrO, CaO, MgO, K2O, Na2O and Li2O in total, has a mass ratio (B2O3/(B2O3+SiO2)) of 0.15 or more, a mass ratio (TiO2/(TiO2+Nb2O5+ZrO2)) of 0.01 to 0.8, a mass ratio ((BaO+SrO+CaO)/(BaO+SrO+CaO+MgO+K2O+Na2O+Li2O)) of 0.4 or more, and a mass ratio ((K2O+Na2O+Li2O)/(BaO+SrO+CaO+MgO+K2O+Na2O+Li2O)) of 0.1 or more, substantially does not include PbO, and has a refractive index nd of 1.78-1.84, and an Abbe's number νd of 26-32.
First Claim
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International Classification(s)
- 2013 Application Filing Year
- C03C Class
- 680 Applications Filed
- 602 Patents Issued To-Date
- 88.53 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 5 Citation Count
- C03C Class
- 25.77 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 16, 2028 |
