| 发明名称 |
Optical glass |
| 摘要 |
A high refractive, low dispersive optical glass composition based on a B2O3-La2O3-Y2O3-TiO2 quaternary system which is free of thorium oxide. The glass made of the composition has a refractive index of 1.79 to 1.93 and an Abbe number of 30 to 41.
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| 申请公布号 |
US4166746(A) |
申请公布日期 |
1979.09.04 |
| 申请号 |
US19780916263 |
申请日期 |
1978.06.16 |
| 申请人 |
NIPPON KOGAKU K K |
发明人 |
ICHIMURA, TAKEO;ISHIBASHI, KAZUFUMI |
| 分类号 |
C03C3/155;(IPC1-7):C03C3/14 |
主分类号 |
C03C3/155 |
| 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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