发明名称 |
Mother glass composition for gradient-index lens, gradient-index lens, manufacturing method thereof, optical product, and optical device |
摘要 |
The present invention provides a mother glass composition for gradient-index lens, from which a lead-free Li-based gradient-index lens that is excellent in weather resistance, in particular weather resistance in the presence of water, can be manufactured. The mother glass composition includes the following components, indicated by mol %: 40≦̸SiO2≦̸65; 1≦̸TiO2≦̸10; 0.1≦̸MgO≦̸22; 0.15≦̸ZnO≦̸15; 2≦̸Li2O≦̸18; 2≦̸Na2O≦̸20; 0≦̸B2O3≦̸20; 0≦̸Al2O3≦̸10; 0≦̸K2O≦̸3; 0≦̸Cs2≦̸O≦̸3; 0≦̸Y2O3≦̸5; 0≦̸ZrO2≦̸2; 0≦̸Nb2O5≦̸5; 0≦̸In2O3≦̸5; 0≦̸La2O3≦̸5; and 0≦̸Ta2O5≦̸5. The mother glass composition further includes at least two oxides selected from CaO, SrO, and BaO each in a range of 0.1 mol % to 15 mol %. The total of MgO+ZnO is greater than or equal to 2 mol %. The molar ratio of ZnO/(MgO+ZnO) is in a range of 0.07 to 0.93. The total of Li2O+Na2O is in a range of 6 mol % to 38 mol %. The total of Y2O3+ZrO2+Nb2O5+In2O3+La2O3+Ta2O5 is in a range of 0 mol % to 11 mol %.
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申请公布号 |
US7858546(B2) |
申请公布日期 |
2010.12.28 |
申请号 |
US20080070157 |
申请日期 |
2008.02.15 |
申请人 |
NIPPON SHEET GLASS COMPANY, LIMITED |
发明人 |
MIYAUCHI TARO;SHIBA TATSUFUMI |
分类号 |
C03C3/078;C03C3/089;C03C3/091;C03C3/093;C03C15/00;C03C21/00 |
主分类号 |
C03C3/078 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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