| 发明名称 |
Zoom objective |
| 摘要 |
A zoom objective is composed of three components of which the first and the third each perform a one-round axial movement over the range of variation, while the second simultaneously performs a monotonic axial movement in one direction.
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| 申请公布号 |
US4380376(A) |
申请公布日期 |
1983.04.19 |
| 申请号 |
US19800159492 |
申请日期 |
1980.06.16 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SUDA, SHIGEYUKI;TANAKA, KAZUO |
| 分类号 |
G02B15/20;G02B15/173;(IPC1-7):G02B15/18 |
主分类号 |
G02B15/20 |
| 代理机构 |
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