Cesium-containing optical glass
    3.
    发明授权
    Cesium-containing optical glass 失效
    含铯光学玻璃

    公开(公告)号:US4472030A

    公开(公告)日:1984-09-18

    申请号:US548787

    申请日:1983-11-04

    摘要: A cesium-containing optical glass comprising, by weight, 32-56% of SiO.sub.2, 6-25% of K.sub.2 O, 6-32% of Cs.sub.2 O, 0-30% of BaO, 0-2.5% of MgO, 5-34% of ZnO, 0-3% of ZrO.sub.2 and 0-5% of SnO.sub.2, provided that the total proportion of BaO, MgO and ZnO is 8-40% and the total proportion of ZrO.sub.2 and SnO.sub.2 is 0.2-6%. When this cesium-containing optical glass is treated in a molten bath containing potassium nitrate, the cesium ion in the glass is easily exchanged with a potassium ion and therefore, the cesium ion concentration gradually decreases radially outwardly from the central axis and the potassium ion concentration gradually increases in that direction. Thus, there is obtained a light converge-type lens in which the refractive index gradually decreases in the same direction.

    摘要翻译: 一种含铯的光学玻璃,其包含32-56%的SiO 2,6-25%的K 2 O,6-32%的Cs 2 O,0-30%的BaO,0-2.5%的MgO,5-34% 的ZnO,0-3%的ZrO2和0-5%的SnO2,条件是BaO,MgO和ZnO的总比例为8-40%,ZrO2和SnO2的总比例为0.2-6%。 当含有铯的光学玻璃在含有硝酸钾的熔浴中进行处理时,玻璃中的铯离子容易与钾离子交换,因此铯离子浓度从中心轴逐渐向径向外降,钾离子浓度 朝着这个方向逐渐增加。 因此,获得折射率在相同方向上逐渐减小的聚光型透镜。