FOCUSING CONTROL DEVICE, FOCUSING CONTROL METHOD, FOCUSING CONTROL PROGRAM, LENS DEVICE, AND IMAGING DEVICE
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United States of America Patent
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app pub date -
May 2, 2017
filing date -
Nov 18, 2014
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Abandoned
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Abstract
A focusing control device includes a phase difference calculation unit 11a which calculates the phase difference between a signal group output from a plurality of pixels 52A for phase difference detection and a signal group output from a plurality of pixels 52B for phase difference detection, a lens drive control unit 11c which drives a focus lens according to a drive amount corresponding to the phase difference, and a phase difference prediction unit 11b which calculates a predicted value of a phase difference at a time t(n+1) based on a coefficient a(n) for converting a phase difference calculated at a time t(n) to a drive amount and the difference Δm(n+1) between a movement amount of the focus lens from the time t(n) at the time t(n+1) after the focus lens starts to move according to the drive amount and the drive amount.
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