FOCUS CONTROL DEVICE, IMAGING DEVICE, AND FOCUS CONTROL METHOD
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United States of America Patent
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Issued Date -
Sep 28, 2017
app pub date -
Feb 24, 2017
filing date -
Mar 23, 2016
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Abstract
In order to perform an autofocus operation, a controller of a focus control device selects subject information relating to the current magnification from subject information including previous focus states stored in a storage unit in advance, and determines a focus lens driving range on the basis of a focal length associated with the selected subject information. After the focus lens driving range is determined, a contrast-based autofocus operation is performed within that driving range. Therefore, it is possible to reduce the time taken to obtain the focus state and improve reliability of the focusing.
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