| 发明名称 |
Optical glass, optical element, optical system, and optical device |
| 摘要 |
An optical glass includes, in weight percent: 15% to 36% of SiO2; 13% to 31% of B2O3; 4% to 27% of Al2O3; 0% to 19% of Ta2O5; 0% to 10% of ZrO2; and 0% to 10% of Nb2O5; wherein Ta2O5+Nb2O5+ZrO2≧7.1%; and has optical constants including a refractive index nd between 1.54 and less than 1.61 and an Abbe number νd in the range of 50 to 57; and wherein ΔPg,F that denotes the anomalous dispersion is −0.004 or less. |
| 申请公布号 |
US9527766(B2) |
申请公布日期 |
2016.12.27 |
| 申请号 |
US201414520583 |
申请日期 |
2014.10.22 |
| 申请人 |
NIKON CORPORATION |
发明人 |
Koide Tetsuya;Yamamoto Hiroshi |
| 分类号 |
C03C3/064;C03C3/066;G02B1/00;G02B27/00 |
主分类号 |
C03C3/064 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An optical glass including, in weight percent:
15% to 28% of SiO2; 13% to 31% of B2O3; 4% to 27% of Al2O3; 0% to 19% of Ta2O5; 0% to 10% of ZrO2; 0% to 10% of Nb2O5; 0% to 5% of MgO; 0% to 12% of ZnO; and 0% to 5% of Li2O; wherein Ta2O5+Nb2O5+ZrO2≧7.1%; and having optical constants including a refractive index nd between 1.54 and less than 1.61 and an Abbe number vd in the range of 50 to 57; and wherein ΔPg,F that denotes the anomalous dispersion is −0.004 or less. |
| 地址 |
Tokyo JP |
