发明名称 |
Lens barrel and optical apparatus |
摘要 |
A lens barrel includes a plurality of lens units, a plurality of cams arranged to respectively cause the plurality of lens units which are being rotated around an optical axis during a focusing action to move in the optical axis direction, at least one of the plurality of cams being a range varying cam which causes a moving range of the associated lens unit to vary according to a magnification varying state, and a rotary driving member arranged to be rotated around the optical axis by a manual operation or by a motor, wherein the plurality of lens units are interlinked with the rotary driving member in such a way as to be movable in the optical axis direction relative to the rotary driving member independently of each other and rotatable integrally with the rotary driving member.
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申请公布号 |
US5978156(A) |
申请公布日期 |
1999.11.02 |
申请号 |
US19970896366 |
申请日期 |
1997.07.18 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
OKADA, TADANORI;ISHIKAWA, MASANORI |
分类号 |
G02B7/04;G02B7/08;G02B7/10;(IPC1-7):G02B15/14 |
主分类号 |
G02B7/04 |
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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