发明授权
- 专利标题： Camera focus detection system using holographic beam splitter
- 专利标题（中）： 使用全息分束器的相机焦点检测系统
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申请号： US772243申请日： 1991-10-07
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公开(公告)号： US5212375A公开(公告)日： 1993-05-18
- 发明人: Hisashi Goto , Tsutomu Uzawa , Yoshihiro Kawano , Hiroyuki Kurita , Hideaki Yoshida , Akira Hasegawa , Kimihiko Nishioka
- 申请人： Hisashi Goto , Tsutomu Uzawa , Yoshihiro Kawano , Hiroyuki Kurita , Hideaki Yoshida , Akira Hasegawa , Kimihiko Nishioka
- 申请人地址： JPX Tokyo
- 专利权人： Olympus Optical Co., Ltd.
- 当前专利权人： Olympus Optical Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-271621 19901009; JPX2-272913 19901011
- 主分类号： G02B5/32
- IPC分类号： G02B5/32 ; G02B7/28 ; G03B7/099
摘要：
An imaging system having a focus detecting device performs focus detection by detecting an output signal indicative of intensity distribution of light derived from a light-receiving element, in which at least one holographic optical element is arranged on the object side of a primary imaging plane to form an image on the light-receiving element. Thus, the imaging system has significant advantages in practical use that the arrangement is simple and the camera body is made compact.
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