| 发明名称 |
Variable focal length lens system |
| 摘要 |
A variable focal length lens system is disclosed having wide angle capability and a small size. The system has seven lenses divided in two groups. The first group consists of three of the lenses and is movable relative to the second group, which consists of the remaining four lens.
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| 申请公布号 |
US4074931(A) |
申请公布日期 |
1978.02.21 |
| 申请号 |
US19760649383 |
申请日期 |
1976.01.15 |
| 申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
OKUDAIRA, SADAO |
| 分类号 |
G02B15/16;G02B15/177;(IPC1-7):G02B15/14 |
主分类号 |
G02B15/16 |
| 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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