| 摘要 |
PROBLEM TO BE SOLVED: To provide optical glass that has desired optical characteristics and also has excellent transmittance.SOLUTION: The optical glass contains, as a glass composition, SiO0.1-40%, TaO0.1%-35%, NbO39.5-70% (not including 70%), TiO0-15% and NaO+KO+LiO 0.1-40%, in mass%, and does not substantially contain a lead component, an arsenic component, and a fluorine component. |
