Invention Grant
US09591205B2 Focus control apparatus, optical apparatus, focus control method, and storage medium storing focus detection program
有权
聚焦控制装置，光学装置，聚焦控制方法和存储焦点检测程序的存储介质
- Patent Title: Focus control apparatus, optical apparatus, focus control method, and storage medium storing focus detection program
- Patent Title (中): 聚焦控制装置，光学装置，聚焦控制方法和存储焦点检测程序的存储介质
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Application No.: US14962200Application Date: 2015-12-08
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Publication No.: US09591205B2Publication Date: 2017-03-07
- Inventor: Keisuke Kudo
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2014-254163 20141216
- Main IPC: H04N5/232
- IPC: H04N5/232
Abstract:
The focus control apparatus drives a focus element by following drive amounts: when a reliability of a phase difference focus detection is higher than a first reliability and a defocus amount is larger than a first defocus amount, a first drive amount that is smaller than a phase difference in-focus drive amount by a first non-drive amount; when the reliability is higher than the first reliability and the defocus amount is smaller than the first defocus amount, the phase difference in-focus drive amount; and when the reliability is lower than the first reliability and higher than a second reliability and the defocus amount is larger than a second defocus amount, a second drive amount that is smaller than the phase difference in-focus drive amount by a second non-drive amount. The apparatus drives the focus element, in other cases, by using the contrast evaluation value.
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