Title:
光学ガラス、ガラスプリフォーム、光学素子及びこれを有する光学機器
Document Type and Number:
Japanese Patent JP7171734
Kind Code:
B2
Abstract:
Disclosed are an optical glass, a glass preform, an optical element and an optical instrument having the same. The optical glass comprises 5 to 25 wt % of B2O3, 25 to 45 wt % of La2O3, 0 to 10 Wt % of Y2O3, 10 to 35 wt % of Gd2O3, 0.5 to 15 wt % of SiO2, 1 to 15 wt % of ZrO2, 0 to 5 wt % of TiO2, 0 to 7 wt % of WO3, 0 to 15 wt % of Ta2O5, 0 to 10 wt % of ZnO and 0 to 8.5 wt % of Nb2O5; and m(B2O3+SiO2+ZrO2+Nb2O5+TiO2+WO3)/m(La2O3+ZrO2) is not lower than 0.6.
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Inventors:
Sun Wei
Application Number:
JP2020536866A
Publication Date:
November 15, 2022
Filing Date:
August 17, 2018
Export Citation:
Assignee:
CDGM Glass Company Limited
International Classes:
C03C3/068; G02B1/00
Domestic Patent References:
| JP2014084235A | ||||
| JP2013536791A |
Foreign References:
| CN105293897A | ||||
| CN105198206A |
Attorney, Agent or Firm:
Patent Attorney Corporation ATEN