| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical glass having improved colorability, having high refractive index high dispersibility, stably extremely small in the amount of foam in the glass and further excellent in devitrification resistance.SOLUTION: There is provided an optical glass having refractive index of 1.83 or more and Abbe number of 26 or less and containing SiO, TiO, NbOand NaO in terms of oxide as essential components and SbOof over 0 mass% and less than 0.01 mass% by outer percentage.SELECTED DRAWING: None |
