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BASE GLASS COMPOSITION FOR GRADED-REFRACTIVE-INDEX ROD LENS AND GRADED-REFRACTIVE-INDEX ROD LENS PRODUCED FROM THE SAME
BASE GLASS COMPOSITION FOR GRADED-REFRACTIVE-INDEX ROD LENS AND GRADED-REFRACTIVE-INDEX ROD LENS PRODUCED FROM THE SAME
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机译：渐变折射率棒状透镜的基本玻璃成分和由该透镜透镜制成的渐变折射率棒状透镜
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摘要
A glass composition suitable for producing a graded-refractive-index rod lens having an angular aperture of 16-20° without containing lead or thallium and a graded-refractive-index rod lens produced from the composition are provided.;The composition is a base glass composition for graded-refractive-index rod lenses, characterized by comprising, in terms of % by mole, 20≦SiO2≦52, 1≦B2O3≦30, 12≦Li2O≦18, 8≦Na2O≦15, 0≦MgO≦15, 0≦SrO≦10, 0≦BaO≦10, 0≦ZnO≦15, 0≦TiO2≦15, 0≦Nb2O5≦5, 0≦Ta2O5≦5, and 3Bi2O3≦13, provided that 45≦SiO2+B2O3≦65, 9≦MgO+ZnO+TiO2≦25, and 0≦Nb2O5+Ta2O5≦5, and by containing substantially no lead and substantially no thallium.
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机译：提供了一种玻璃组合物和由该组合物制成的梯度折射率棒状透镜，该玻璃组合物适合于生产不具有铅或th的角孔径为16-20°的梯度折射率棒状透镜。用于梯度折射率棒状透镜的玻璃组合物，其特征在于，以摩尔％计，包含20≤SiO 2 ≤52，1≤B 2 O 3 ≦30，12≦Li 2 O≦18，8≦Na 2 O≦15，0≦MgO≦15，0≦SrO≦10 ，0≦BaO≦10，0≦ZnO≦15，0≦TiO 2 ≦15，0≦Nb 2 O 5 ≦5， 0≦Ta 2 O 5 ≦5，3 2 O 3 ≦13，只要45 ≦SiO 2 + B 2 O 3 ≦65，9≦MgO + ZnO + TiO 2 ≦25，和0≤Nb 2 O 5 + Ta 2 O 5 ≤5，并且基本上不包含铅和基本上没有th。
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