发明授权
US5570155A Focusing lens position controlling apparatus for a variable focal length
lens
失效
用于可变焦距透镜的聚焦透镜位置控制装置
- 专利标题： Focusing lens position controlling apparatus for a variable focal length lens
- 专利标题（中）： 用于可变焦距透镜的聚焦透镜位置控制装置
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申请号： US266546申请日： 1994-06-28
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公开(公告)号： US5570155A公开(公告)日： 1996-10-29
- 发明人: Atsushi Shibayama
- 申请人： Atsushi Shibayama
- 申请人地址： JPX Tokyo
- 专利权人： Nikon Corporation
- 当前专利权人： Nikon Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX5-168096 19930707; JPX5-168097 19930707
- 主分类号： G02B7/10
- IPC分类号： G02B7/10 ; G03B13/36
摘要：
A focusing lens position controlling apparatus for a variable focal length lens includes a variable focal length lens having a focusing lens group, a distance measuring device for measuring the object distance information to an object, a focal length detecting device for detecting the focal length information of the variable focal length lens, a first calculating device for calculating an operation coefficient from the output value from the focal length detecting device regarding the focal length information, and a second calculating device for calculating the amount of movement of the focusing lens group from the output value from the distance measuring device regarding the object distance information and the operation coefficient.
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