发明授权
US6052540A Viewfinder device for displaying photographic information relating to
operation of a camera
失效
取景器装置，用于显示与摄像机的操作相关的照相信息
- 专利标题： Viewfinder device for displaying photographic information relating to operation of a camera
- 专利标题（中）： 取景器装置，用于显示与摄像机的操作相关的照相信息
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申请号： US781918申请日： 1996-12-30
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公开(公告)号： US6052540A公开(公告)日： 2000-04-18
- 发明人: Takeshi Koyama
- 申请人： 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： JPX4-269712 19920911; JPX4-279433 19920922
- 主分类号： G03B17/20
- IPC分类号： G03B17/20
摘要：
A viewfinder device includes an objective lens, a hologram disposed in a place other than a prescribed image plane of the objective lens and a plane conjugate to the prescribed image plane, and an illumination device for illuminating the hologram. The position of a virtual image formed by the hologram is arranged to coincide with the prescribed image plane or the plane conjugate to the prescribed image plane, so that displays can be made in an adequate state within the visual field of a viewfinder.