Patent ID: 9380204
Filing Date: 2016-06-28
CPC Classification: G02B,H04N

Claim Text:
1. An imaging device which images a subject though an imaging optical system, comprising: a sensor including a plurality of first phase difference detecting pixels which receives one of a pair of luminous fluxes which has passed through different parts of a pupil area of the imaging optical system and is arranged in a row direction and a plurality of second phase difference detecting pixels which receives the other one of the pair of luminous fluxes and is arranged in the row direction; a defocus amount calculating unit which calculates a correlated amount of a first output signal group which is formed by output signals of the plurality of first phase difference detecting pixels, respectively, and a second output signal group which is formed by output signals of the plurality of second phase difference detecting pixels, respectively, while shifting the first output signal group and the second output signal group in the row direction by an arbitrary shifted amount to calculate a defocus amount from a phase difference amount of the first output signal group and the second output signal group when the correlated amount is maximum; and a focus control unit which controls a focused state of the imaging optical system based on the defocus amount calculated by the defocus amount calculating unit, wherein in a moving image capturing mode, the defocus amount calculating unit sets an upper limit of the shifted amount of the first output signal group and the second output signal group to a first value based on at least one of an F value of the imaging optical system, a focal distance of the imaging optical system and a position of a focus lens included in the imaging optical system at the time of capturing arbitrary images which configure a moving image, and changes the upper limit of the shifted amount when an imaging direction of the imaging device varies after the first value is set.