Patent ID: 9288384
Filing Date: 2016-03-15
CPC Classification: G02B,G03B,H04N

Claim Text:
1. An imaging device, comprising: an imaging element that has a plurality of pairs of first pixel cells and second pixel cells receiving a pair of light fluxes passing through different pupil regions of an photographing optical system and outputting signals according to a light amount; a first defocus amount calculating unit that calculates a defocus amount using a narrow range signal group obtained from the plurality of pairs in a first range; a second defocus amount calculating unit that calculates a defocus amount using a broad range signal group obtained from all the pairs in a second range which includes the first range and is broader than the first range; and a focus control unit that controls a focus state of the imaging optical system based on the defocus amount calculated by the first defocus amount calculating unit and the defocus amount calculated by the second defocus amount calculating unit, wherein the second defocus amount calculating unit generates a broad pitch signal group having an arrangement pitch being larger than an arrangement pitch of the narrow range signal groups using the broad range signal group and calculates the defocus amount using the broad pitch signal group.