Patent ID: 9432569
Filing Date: 2016-08-30
CPC Classification: G02B,G03B,H04N

Claim Text:
1. An imaging device, comprising: a sensor including a plurality of first phase difference detecting pixels which receives one of a pair of luminous fluxes which have passed through different parts of a pupil area of an 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 and a second output signal group while shifting the first output signal group of the plurality of first phase difference detecting pixels and the second output signal group of the plurality of second phase difference detecting pixels in the row direction by an arbitrary amount to calculate a defocus amount from a first shift amount of the first output signal group and the second output signal group when the correlated amount is at a maximum; and a focus control unit which controls a focus state of the imaging optical system based on the defocus amount, wherein the defocus amount calculating unit changes an upper limit of a shift amount of the first output signal group and the second output signal group in accordance with 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.