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这个发明是关于PbO·B_2O_3·SiO_2·Al_2O_3系统的光学玻璃,它具有优良的光学特性和很高的抗气候变化能力(抗潮特性)。这个发明还谈到了由这个系统通过添加金属氧化物,例如La_2O_3和/或CaO,而衍生的光学玻璃。
This invention relates to an optical glass of the PbO · B 2 O 3 · SiO 2 · Al 2 O 3 system, which has excellent optical properties and high resistance to climatic changes (moisture resistance). This invention also addresses the optical glass derived from this system by the addition of metal oxides such as La 2 O 3 and / or CaO.