| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical glass that substantially comprises no PbO, which is not favorable for the environment, and has negative abnormal dispersibility.SOLUTION: An optical glass comprises, by wt.%, SiO: 20-40%, BO: 5-30%, CaO: 5-10%, ZrO: 1-10%, NbO: 5-25%, AlO: 0-5%, NaO: 0-10%, KO: 0-10%, LiO: 0-5%, BaO: 0-15%, SrO: 0-10%, MgO: 0-10%, ZnO: 0-10%, TiO: 0-6%, WO: 0-5%, TaO: 0-5%, GeO: 0-5%, SbO: 0-1%, and LaO: 0-5% and substantially comprises no PbO.SELECTED DRAWING: Figure 1 |
