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发明授权
US08575049B2 Optical glass, glass molded body, optical device and their production methods 有权
光学玻璃，玻璃成型体，光学元件及其制作方法

Optical glass, glass molded body, optical device and their production methods
摘要：
An optical glass comprising, by mass %, 12 to 30% of total of B2O3 and SiO2, 55 to 80% of total of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3, 2 to 10% of ZrO2, 0 to 15% of Nb2O5, 0 to 15% of ZnO and 0% or more but less than 13% of Ta2O5, wherein the ratio of the content of Ta2O5 to the total content of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3 is 0.23 or less, the ratio of the total content of La2O3, Gd2O3, Y2O3 and Yb2O3 to the total content of B2O3 and SiO2 is from 2 to 4, the optical glass having a refractive index nd of 1.86 or more and an Abbe's number νd of 38 or more, and a rod-shaped glass shaped material and an optical element formed of the above optical glass each.
摘要（中）：

一种光学玻璃，以质量％计含有B 2 O 3和SiO 2为12〜30％，La 2 O 3，Gd 2 O 3，Y 2 O 3，Yb 2 O 3，ZrO 2，Nb 2 O 5，WO 3为总计的55〜80％，ZrO 2为2〜10％，0〜 15％的Nb 2 O 5，0〜15％的ZnO和0％以上且小于13％的Ta 2 O 5，其中Ta 2 O 5的含量与La 2 O 3，Gd 2 O 3，Y 2 O 3，Yb 2 O 3，ZrO 2，Nb 2 O 5和WO 3的总含量的比例 为0.23以下，La 2 O 3，Gd 2 O 3，Y 2 O 3和Y 2 O 3的总含量与B 2 O 3和SiO 2的总含量的比例为2〜4，折射率nd为1.86以上且光子玻璃的阿贝数为nud 38个以上，以及由上述光学玻璃形成的棒状玻璃成形材料和光学元件。

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