发明名称 |
Focus detecting device for camera |
摘要 |
Focus detecting device comprises a focus detecting optical system for guiding the light from an object onto a focus detecting plane, focus detecting means for identifying the focusing state from the image of the object formed on the focus detecting plane, means for generating a signal corresponding to the controlled actual F-number of the photographic optical system, means for generating a correction signal corresponding to the displacement of the optimum image plane of the photographing optical system according to the change of the controlled F-number, and means for correcting the output signal of the focus detecting means according to the correction signal.
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申请公布号 |
US4473287(A) |
申请公布日期 |
1984.09.25 |
申请号 |
US19820389049 |
申请日期 |
1982.06.16 |
申请人 |
NIPPON KOGAKU K.K. |
发明人 |
FUKUHARA, TORU;KIMURA, MAKOTO |
分类号 |
G03B13/36;G02B7/28;G02B7/34;(IPC1-7):G03B13/18 |
主分类号 |
G03B13/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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