Invention Grant
- Patent Title: Lens barrel and imaging apparatus
- Patent Title (中): 镜筒和成像装置
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Application No.: US12555935Application Date: 2009-09-09
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Publication No.: US08284275B2Publication Date: 2012-10-09
- Inventor: Takashi Abe
- Applicant: Takashi Abe
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Panasonic Patent Center
- Priority: JP2008-233199 20080911
- Main IPC: H04N5/262
- IPC: H04N5/262 ; H04N5/228 ; G03B13/00

Abstract:
A lens barrel includes a correction lens to move along an optical axis to perform zoom tracking, a correction lens driver to drive the correction lens, a zoom lens, a zoom ring to be turned by a user, a zoom lens driver to mechanically move the zoom lens according to an amount of turn of the zoom ring, a position detector to detect a position of the zoom lens, a rate detector to detect a change rate of the position of the zoom lens, a storage unit to store relational information which associates the position of the zoom lens with a focus position of the correction lens, and a controller to control the correction lens driver. The controller determines a focus position of the correction lens corresponding to a position more distant by a predetermined amount from the position of the zoom lens detected by the position detector, by referring to the relational information, and controls the correction lens driver to drive the correction lens with a target position set to the determined focus position. The predetermined amount is changed according to the change rate of the position of the zoom lens detected by the rate detector.
Public/Granted literature
- US20100066864A1 LENS BARREL AND IMAGING APPARATUS Public/Granted day:2010-03-18
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