发明授权
US4576458A Camera finder employing holographic view field frames 失效
摄像机采用全息影像帧

Camera finder employing holographic view field frames
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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