Focus detecting apparatus, control method thereof, and image-pickup apparatus
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United States of America Patent
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Mar 7, 2017
Grant Date -
Sep 18, 2014
app pub date -
Mar 10, 2014
filing date -
Mar 12, 2013
priority date (Note) -
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Abstract
A focus detecting apparatus includes a first image sensor configured to receive a light beam that has passed through an optical system and to output a first signal to be used for a focus detection by a phase difference detection method, a second image sensor configured to receive, by a masking device, a light beam narrower than that received by the first image sensor, which has passed through the optical system and to output a second signal to be used for the focus detection by the phase difference detection method, and a calculating circuit configured to calculate the focus detection by the phase difference detection method. In the focus detection calculation, a search range for an in-focus position using the first signal is wider than that using the second signal.
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