发明名称 |
Image-taking apparatus with first focus control such that in-focus position is searched for based on first signal and second focus control such that one of in-focus position and drive amount is determined based on second signal |
摘要 |
An image-taking apparatus which reduces occurrence of unnatural focus changes is disclosed. The image-taking apparatus includes a first detector which outputs a first signal representing a focus state of an image-taking optical system based on a predetermined-frequency component of an output signal of the image-pickup device and a second detector which outputs a second signal different from the first signal. The image-taking apparatus also includes has a controller which performs a first focus control for controlling drive of the focus lens based on the first signal and a second focus control for controlling drive of the focus lens based on the second signal. The controller performs the second focus control in a case where an in-focus state cannot be achieved with the first focus control.
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申请公布号 |
US7570298(B2) |
申请公布日期 |
2009.08.04 |
申请号 |
US20040909404 |
申请日期 |
2004.08.03 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
YASUDA HITOSHI |
分类号 |
G03B13/36;H04N5/232;G02B7/28;G02B7/30;G02B7/32;G02B7/34;G02B7/36;G02B7/40;G03B3/00;G03B13/00;H04N101/00 |
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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