发明授权
- 专利标题： Automatic focus detection system
- 专利标题（中）： 自动对焦检测系统
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申请号： US51138申请日： 1987-05-15
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公开(公告)号： US4831403A公开(公告)日： 1989-05-16
- 发明人: Tokuji Ishida , Masataka Hamada , Kenji Ishibashi , Nobuyuki Taniguchi , Hiroshi Ootsuka , Toshio Norita , Toshihiko Karasaki
- 申请人： Tokuji Ishida , Masataka Hamada , Kenji Ishibashi , Nobuyuki Taniguchi , Hiroshi Ootsuka , Toshio Norita , Toshihiko Karasaki
- 申请人地址： JPX Osaka
- 专利权人： Minolta Camera Kabushiki Kaisha
- 当前专利权人： Minolta Camera Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX60-298035 19851227; JPX60-298036 19851227; JPX60-113315 19860516
- 主分类号： G02B7/34
- IPC分类号： G02B7/34 ; G02B7/36
摘要：
A camera with an automatic focusing device has an objective lens mounted on a camera. An image formed by the objective lens is divided into a plurality of zones. In each zone, a brightness distribution is obtained so as to detect a rough focusing condition in each zone, thereby producing a plurality of rough focusing condition data. Based on the result of the rough focusing condition data, one zone is selected. Furthermore, a precise focusing condition is detected in the selected zone based on the light contained in the selected zone, so as produce a precise focusing condition data. Based on the precise focusing condition data obtained from the selected zone, the object lens is driven to an infocus condition.
公开/授权文献
- USD377803S Temple member for an eyeglass frame 公开/授权日：1997-02-04
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