发明授权
- 专利标题： Apparatus for detecting an in-focused condition of optical systems
- 专利标题（中）： 用于检测光学系统的聚焦状态的装置
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申请号： US86674申请日： 1979-10-19
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公开(公告)号： US4331864A公开(公告)日： 1982-05-25
- 发明人: Yoshio Nakajima , Shuichi Takayama , Kosaku Tsuboshima , Teruo Iwasawa , Masafumi Yamazaki
- 申请人： Yoshio Nakajima , Shuichi Takayama , Kosaku Tsuboshima , Teruo Iwasawa , Masafumi Yamazaki
- 申请人地址： JPX Tokyo
- 专利权人： Olympus Optical Company Limited
- 当前专利权人： Olympus Optical Company Limited
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX53/133558 19781030
- 主分类号： G03B13/36
- IPC分类号： G03B13/36 ; G01C3/32 ; G02B7/36 ; G02B7/38 ; G01J1/36
摘要：
An apparatus for detecting an in-focused condition of optical systems by using two values of indices of performance each derived from the number of differences between illumination signals obtained per picture element, comprising first and second image sensors arranged in front of and in the rear of a focal plane of the optical system, first and second analog data processing circuits, and a comparing means.
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