发明授权
- 专利标题: Camera finder employing holographic view field frames
- 专利标题(中): 摄像机采用全息影像帧
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申请号: US596196申请日: 1984-04-02
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公开(公告)号: US4576458A公开(公告)日: 1986-03-18
- 发明人: Michio Cho , Masane Suzuki , Takayuki Saito
- 申请人: Michio Cho , Masane Suzuki , Takayuki Saito
- 申请人地址: JPX Kanagawa
- 专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人地址: JPX Kanagawa
- 优先权: JPX58-59728 19830405; JPX58-227542 19831201
- 主分类号: G03B13/14
- IPC分类号: G03B13/14 ; G03B13/12
摘要:
A camera finder capable of indicating a view field frame for determining the range of photographing and a target mark for showing a desired focus adjusting portion. Interposed between an objective lens and an eye lens in this finder are holograms having recorded thereon view field frames and a target mark. The hologram is irradiated by a reference beam or beams, whereby the view field frame and the target mark are regenerated. In the hologram, there are recorded a first view field frame in which a parallax is corrected in the long-medium distance and a second view field frame in which a parallex is corrected in the short distance. A beam source for regenerating each view field frame is selected in accordance with an object distance, whereby a view field frame corresponding to the object distance is regenerated. The parallax can be corrected as described above.
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