Title:
OPTICAL GLASS PLATE
Document Type and Number:
WIPO Patent Application WO/2023/017759
Kind Code:
A1
Abstract:
Provided is an optical glass plate having a higher refraction index characteristic than conventional optical glass plates. This optical glass plate is characterized by containing 0-12% of SiO2, 0-10% of B2O3, 0-9% of BaO, 0-5% of ZnO, 2-10% of ZrO2, 15-45% of La2O3, 0-15% of Gd2O3, 0-15% of Nb2O5, 0-10% of WO3, 15-50% of TiO2, and 0.1-10% of Y2O3 by mass% and characterized in that the ratio Y3+/(Gd3+ + Y3+ + Yb3+) is 0.2 or more in terms of cation%, the refraction index nd is 2.01 or more, and the Abbe number νd is 35 or less.
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Inventors:
KONOSHITA SATOKO (JP)
Application Number:
PCT/JP2022/029687
Publication Date:
February 16, 2023
Filing Date:
August 02, 2022
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO (JP)
International Classes:
C03C3/068; C03C3/155; G02B1/00; G02B27/02
Domestic Patent References:
| WO2020045417A1 | 2020-03-05 | |||
| WO2021006072A1 | 2021-01-14 | |||
| WO2020004140A1 | 2020-01-02 |
Foreign References:
| JP2021102549A | 2021-07-15 | |||
| JP2017081823A | 2017-05-18 | |||
| JPS6033229A | 1985-02-20 | |||
| US4584279A | 1986-04-22 |
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