Optical apparatus and drive controlling method
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United States of America Patent
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Jun 20, 2017
Grant Date -
Aug 27, 2015
app pub date -
Feb 18, 2015
filing date -
Feb 21, 2014
priority date (Note) -
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Abstract
A controller controls a focus lens driver so as to maintain an in-focus state associated with a magnification variation, based on information on a tracking curve that represents a position of the focus lens corresponding to an object distance and a focal length of an image-pickup optical system. The controller controls the focus lens driver so as to prevent the focus lens from being moved for focusing based on a difference between an actual position of the focus lens and the position of the focus lens indicated by the tracking curve in a case the focus lens driver is driving the focus lens based on information on the tracking curve.
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