发明名称 |
Optical glass and optical element |
摘要 |
The present invention is aimed to provide a cost-effective optical glass with refractive index of 1.74-1.80 and Abbe number of 47-51 but containing no Gd2O3 and an optical element made hereof. The optical glass contains the following components according to percentage by weight: more than 2.7% but less than 10% of SiO2, 20-31% of B2O3, 38-49% of La2O3, more than 12% but less than 20% of Y2O3, more than 1% but less than 4% of ZnO, more than 0.5% but less than 3% of Nb2O5, wherein the content of ZnO is more than that of Nb2O5, 0-5% of Ta2O5, 0-5% of RO, wherein the RO is one or more of CaO, SrO and MgO, and content of ZrO2 is more than 6.7% but less than 15%. The present invention is a lanthanum borate glass containing no Gd2O3. A stable glass can be obtained by adjusting the content of La2O3, B2O3 and Y2O3. |
申请公布号 |
US9145328(B2) |
申请公布日期 |
2015.09.29 |
申请号 |
US201214343559 |
申请日期 |
2012.09.06 |
申请人 |
CDGM GLASS CO., LTD |
发明人 |
Sun Wei |
分类号 |
C03C3/066;C03C3/068 |
主分类号 |
C03C3/066 |
代理机构 |
Ladas & Parry LLP |
代理人 |
Ladas & Parry LLP |
主权项 |
1. An optical glass is characterized in that it comprises the following components according to percentage by weight: more than 2.7% but less than 10% of SiO2, 20-31% of B2O3, 38-49% of La2O3, more than 12% but less than 20% of Y2O3, more than 1% but less than 4% of ZnO, more than 0.5% but less than 3% of Nb2O5, wherein the content of ZnO is more than that of Nb2O5, 0-5% of Ta2O5, 0-5% of RO, wherein the RO is one or more of CaO, SrO and MgO, and content of ZrO2 is more than 6.7% but less than 15%. |
地址 |
Chengdu, Sichuan CN |