Invention Grant
- Patent Title: Automatic focusing apparatus as well as lens apparatus and image pickup system including the automatic focusing apparatus
- Patent Title (中): 自动对焦装置以及包括自动聚焦装置的透镜装置和图像拾取系统
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Application No.: US13336049Application Date: 2011-12-23
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Publication No.: US09568709B2Publication Date: 2017-02-14
- Inventor: Shingo Isobe
- Applicant: Shingo Isobe
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2011-000647 20110105
- Main IPC: G02B7/28
- IPC: G02B7/28 ; H04N5/232 ; G02B7/08 ; G02B27/28 ; G03B3/10 ; G03B13/36 ; H04N5/369

Abstract:
An automatic focusing apparatus includes: a first focus detector that detects a first focus evaluation value based on a phase difference; a second focus detector that detects a second focus evaluation value using a signal from an image pickup element; a focusing mechanism; a focus controller that controls the focusing mechanism based on the first focus evaluation value obtained by the first focus detector and the second focus evaluation value obtained by the second focus detector; and a speed setting unit that sets, in a process obtaining an in-focus state by using the focus controller, a driving speed for the focus controller to drive the focusing mechanism based on a first data detected by the first focus detector and the second focus evaluation value.
Public/Granted literature
Information query