发明申请
- 专利标题: OPTICAL GLASS, PREFORM FOR PRECISION PRESS MOLDING, OPTICAL ELEMENT AND METHOD OF MANUFACTURING THEREOF
- 专利标题(中): 光学玻璃,精密压制成型机,光学元件及其制造方法
-
申请号: US13652693申请日: 2012-10-16
-
公开(公告)号: US20130040800A1公开(公告)日: 2013-02-14
- 发明人: Yasuhiro FUJIWARA
- 申请人: HOYA CORPORATION
- 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: JP2006-089116 20060328
- 主分类号: C03C3/068
- IPC分类号: C03C3/068 ; C03B11/00 ; C03B7/14 ; C03C3/15 ; C03C3/155
摘要:
An optical glass having a refractive index nd of 1.70 or greater and an Abbé number of 50 or greater. Given as mole percentages, it comprises: B2O3 (20 to 80 percent), SiO2 (0 to 30 percent), Li2O (1 to 25 percent), ZnO (0 to 20 percent), La2O3 (4 to 30 percent), Gd2O3 (1 to 25 percent), Y2O3 (0 to 20 percent), ZrO2 (0 to 5 percent), MgO (0 to 25 percent), CaO (0 to 15 percent), and SrO (0 to 10 percent), with the combined quantity of the above components being 97 percent or greater. The molar ratio of {ZnO/(La2O3+Gd2O3+Y2O3)} is 0.8 or less and the molar ratio of {(CaO+SrO+BaO)/(La2O3+Gd2O3+Y2O3)} is 0.8 or less. Ta2O5 may be incorporated as an optional component, with the molar ratio {(ZrO2+Ta2O5)/(La2O3+Gd2O3+Y2O3)} being 0.4 or less.
公开/授权文献
信息查询