Focus control apparatus, optical apparatus, focus control method, and storage medium storing focus detection program
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United States of America Patent
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Mar 7, 2017
Grant Date -
Jun 16, 2016
app pub date -
Dec 8, 2015
filing date -
Dec 16, 2014
priority date (Note) -
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status (Latency Note)
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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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