| 发明名称 |
FOCUS DETECTING APPARATUS, CONTROL METHOD THEREOF, AND IMAGE-PICKUP APPARATUS |
| 摘要 |
A focus detecting apparatus includes a first image sensor configured to receive a light beam that has passed through an optical system and to output a first signal to be used for a focus detection by a phase difference detection method, a second image sensor configured to receive, by a masking device, a light beam narrower than that received by the first image sensor, which has passed through the optical system and to output a second signal to be used for the focus detection by the phase difference detection method, and a calculating circuit configured to calculate the focus detection by the phase difference detection method. In the focus detection calculation, a search range for an in-focus position using the first signal is wider than that using the second signal. |
| 申请公布号 |
US2014267843(A1) |
申请公布日期 |
2014.09.18 |
| 申请号 |
US201414202392 |
申请日期 |
2014.03.10 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
Sakaguchi Takeshi |
| 分类号 |
H04N5/232 |
主分类号 |
H04N5/232 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A focus detecting apparatus comprising:
a first image sensor configured to receive a light beam that has passed through an optical system and to output a first signal to be used for a focus detection by a phase difference detection method; a second image sensor configured to receive, by a masking device, a light beam narrower than that received by the first image sensor, which has passed through the optical system and to output a second signal to be used for the focus detection by the phase difference detection method; and a calculating circuit configured to calculate the focus detection by the phase difference detection method, wherein, in the focus detection calculation, a search range for an in-focus position using the first signal is wider than that using the second signal. |
| 地址 |
TOKYO JP |
