发明授权
US4996173A Optical glass 失效
光学玻璃

Optical glass
摘要:
The optical glass of the present invention comprising SiO.sub.2, alkali metal oxides, P.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 has optical properties of 1.70 or more in refractive index nd and 30 or less in Abbe's number .nu.d and is superior in devitrification resistance and stability.
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