发明申请
- 专利标题: Optical glass, optical element and method of manufacturing thereof
- 专利标题(中): 光学玻璃,光学元件及其制造方法
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申请号: US11723467申请日: 2007-03-20
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公开(公告)号: US20070249480A1公开(公告)日: 2007-10-25
- 发明人: Yuta Kobayashi , Yoichi Hachitani
- 申请人: Yuta Kobayashi , Yoichi Hachitani
- 申请人地址: JP Tokyo
- 专利权人: HOYA CORPORATION
- 当前专利权人: HOYA CORPORATION
- 当前专利权人地址: JP Tokyo
- 优先权: JP2006-79206 20060322
- 主分类号: C03C3/068
- IPC分类号: C03C3/068
摘要:
An optical glass comprises, denoted as weight percentages, SiO2: 2-22%, B2O3: 3-24%, ZnO: >8% and ≦30%, CaO+BaO+ZnO: 10-50%, MgO: 0-3%, La2O3+Y2O3+Gd2O3+Yb2O3: 1-33%, TiO2: 2-20%, ZrO2: 0-10%, Nb2O5: 2-32%, Li2O: 0-5%, Na2O: 0-8%, K2O: 0-10%, WO3: 0-20%. The ratio by weight of La2O3 to the combined contents of La2O3, Y2O3, Gd2O3, and Yb2O3 (La2O3/(La2O3+Y2O3+Gd2O3+Yb2O3)) falls within a range of 0.7 to 1.
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