| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical glass that can easily achieve a low glass transition point, has excellent weather resistance and chemical durability, and also has excellent light transmittance in visible region and near-ultraviolet region.SOLUTION: An optical glass comprises, by cation %, Pof 0.1% or more and Snof 1% or more, with P+Snof 70.5% or more, and comprises, by anion %, Oof 30-99.9% and F+Clof 0.1-70%.SELECTED DRAWING: None |
