Optical apparatus for calculating an object distance
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United States of America Patent
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Jun 3, 2014
Grant Date -
May 2, 2013
app pub date -
Oct 26, 2012
filing date -
Oct 28, 2011
priority date (Note) -
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Abstract
An optical apparatus includes a first driver configured to drive a focus lens unit in autofocusing, a second driver configured to drive the focus lens unit in the autofocusing, a first detector configured to detect a driving amount of the first driver, a second detector configured to detect a driving amount of the second driver, a memory configured to store a relationship between information of detection results of the first and second detectors, and an object distance as a distance from the optical apparatus to an object, and a controller configured to obtain information of the object distance based upon the relationship stored in the memory and the detection results of the first and second detectors.
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