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发明授权
CN104876440B 光学玻璃 有权

光学玻璃
摘要：
本发明提供一种光学玻璃，所述光学玻璃按氧化物重量百分比计含有以下组分：SiO2，30～40％；B2O3，1～10％；SiO2+B2O3，33～45％；且以重量百分含量比计3≤SiO2/B2O3≤14，La2O3，0～10％；Nb2O5，25～40％；Nb2O5+SiO2，60～75％；且以重量百分含量比计0.65≤Nb2O5/SiO2≤1.3，ZrO2，3～10％；CaO，1～20％；Li2O，5～15％；Na2O，0～10％；Sb2O3，0～0.2％；所述光学玻璃不含有TiO2，不含有ZnO和BaO，且不含Th、Pb、As、Cd、Hg以及GeO2、TeO2、Ta2O5和Yb2O3；所述光学玻璃的折射率nd在1.70～1.75范围内和阿贝数υd在32～38范围内。所述光学玻璃具有低的失透倾向、高的透过率和低的析晶上限温度，适合于批量生产。主要用于数码产品、摄像机、液晶投影等。
摘要（英）：

The invention provides optical glass. The optical glass comprises the following components (measured by oxide) in percentage by weight: 30-40% of SiO2, 1-10% of B2O3, 33-45% of SiO2+B2O3, 0-10% of La2O3, 25-40% of Nb2O5, 60-75% of Nb2O5+SiO2, 3-10% of ZrO2, 1-20% of CaO, 5-15% of Li2O, 0-10% of Na2O and 0-0.2% of Sb2O3, wherein 3<= SiO2/B2O3<=14 and 0.65<=Nb2O5/SiO2<=1.3; the optical glass does not contain TiO2, ZnO, BaO, Th, Pb, As, Cd, Hg, GeO2, TeO2, Ta2O5 and Yb2O3; and the refractive index nd of the optical glass is within the range of 1.70-1.75, and the Abbe number upsilon d is within the range of 32-38. The optical glass is low in devitrification tendency, high in transmittance, low in maximum crystallization temperature and suitable for mass production, and is mainly used for digital products, cameras, liquid crystal projectors and the like.

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