| 摘要 |
PROBLEM TO BE SOLVED: To provide optical glass with high refractive index and medium low dispersion, especially the optical glass having low yielding point suitable for precise press forming and low liquid phase temperature, and an optical product using it. SOLUTION: The optical glass contains >=2% and <6% SiO2, 17-26% B2O3, 6-26% ZnO, 0.1-3% Li20, 28-40% La2O3, 1-8% Nb2O5, 1-8% Ta2O5 and 1-15% WO3, as glass component by wt.%, and its refractive index nd is 1.7-1.86, the Abbe numberνd is 35-50, and the optical product is formed by precise press forming of the optical glass.
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