发明名称 |
Zoom lens barrel |
摘要 |
A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
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申请公布号 |
US5668670(A) |
申请公布日期 |
1997.09.16 |
申请号 |
US19940226562 |
申请日期 |
1994.04.12 |
申请人 |
KONICA CORPORATION |
发明人 |
NAKAYAMA, HARUKI;HONDA, YUICHI;IMAIZUMI, TOSHIO |
分类号 |
G02B7/04;G02B7/08;G02B7/10;G02B15/16;G03B5/00;(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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