发明名称 |
Automatic focusing device. |
摘要 |
<p>An automatic focusing device which is arranged to perform a focusing action by detecting the peak value of a high frequency component of a video signal obtained from within a focus detecting area set on the image sensing plane of an image sensor and by driving a photo taking optical system in such a way as to increase the detected peak value comprises: a peak position detecting circuit which locates a position on the image sensing plane at which the peak value of the high frequency component of the video signal is detected; and a gate control circuit which changes the position of the focus detecting area in accordance with the detected peak position which is located by the peak position detecting circuit.</p> |
申请公布号 |
EP0263510(A2) |
申请公布日期 |
1988.04.13 |
申请号 |
EP19870114650 |
申请日期 |
1987.10.07 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
BABA, TAKESHI;NIWA, YUKICHI |
分类号 |
G02B7/28;G03B13/36;H04N5/232;(IPC1-7):H04N5/232 |
主分类号 |
G02B7/28 |
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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