发明授权
- 专利标题: Apparatus for detecting focusing state of objective lens
- 专利标题(中): 用于检测物镜的聚焦状态的装置
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申请号: US936746申请日: 1986-12-02
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公开(公告)号: US4792668A公开(公告)日: 1988-12-20
- 发明人: Akira Akashi , Akira Ishizaki , Yasuo Suda , Ichiro Ohnuki , Keiji Ohtaka , Takeshi Koyama
- 申请人: Akira Akashi , Akira Ishizaki , Yasuo Suda , Ichiro Ohnuki , Keiji Ohtaka , Takeshi Koyama
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX60-272563 19851205; JPX60-272564 19851205; JPX60-272565 19851205; JPX60-272566 19851205
- 主分类号: G02B7/36
- IPC分类号: G02B7/36 ; G03B3/00
摘要:
An apparatus for detecting a focusing state of an objective lens comprises optical means for forming light intensity distributions of object images whose relative positional relationship changes with the focusing state of the objective lens, sensing means having a plurality of sensors for sensing the light intensity distributions to produce first and second signals relating to the light intensity distributions, signal processing means for relatively displacing the first and second signals by determining correlation information and producing a signal for adjusting the focusing state of the objective lens in accordance with the correlation information, and altering means for altering a displacement range within which the first and second signals are relatively displaced.
公开/授权文献
- US5910163A Refrigerator with several lockable compartments 公开/授权日:1999-06-08
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