发明名称 |
Stop down structure for facsimile zoom lens |
摘要 |
A diaphragm is mounted for axial movement with the rear lens group in the zoom lens of a facsimile apparatus, and a closing ring axially movable with the rear lens group is rotatable via camming surfaces in a surrounding cylinder to close or open the aperture in accordance with the lens group axial movement.
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申请公布号 |
US4487482(A) |
申请公布日期 |
1984.12.11 |
申请号 |
US19810315562 |
申请日期 |
1981.10.27 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
ITOH, TAKAYUKI;HAMA, YOSHIHIRO |
分类号 |
G03B5/00;G02B7/04;G02B7/10;G02B26/02;G03B9/02;H04N1/04;H04N1/393;(IPC1-7):G02B15/16;G02B13/24 |
主分类号 |
G03B5/00 |
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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