Patent ID: 9386216
Filing Date: 2016-07-05
CPC Classification: G02B,G03B,H04N

Claim Text:
1. An imaging device with an imaging optical system being attachable to/detachable from the imaging device, the imaging device comprising: an imaging element including a light receiving surface, on which a plurality of imaging pixels that capture an image formed by a luminous flux passing through a pupil area of the imaging optical system, a plurality of first phase difference detecting pixels that capture one of a pair of images formed by a pair of luminous fluxes which have passed through different parts of the pupil area of the imaging optical system, and a plurality of second phase difference detecting pixels that capture the other one of the pair of images, are disposed; and a first storing unit that stores sensitivity ratio data indicating a sensitivity ratio of the first phase difference detecting pixel at an arbitrary position and an imaging pixel which is adjacent to the first phase difference detecting pixel and a sensitivity ratio of the second phase difference detecting pixel at an arbitrary position and an imaging pixel which is adjacent to the second phase difference detecting pixel, for all information corresponding to different incident light ray angles in an arbitrary position in an off-centered direction of the pair of images of the light receiving surface, wherein the imaging optical system includes a second storing unit that stores the information of the incident light ray angle of the light ray which is incident in at least two positions in the off-centered direction of the light receiving surface, through the imaging optical system, for all optical conditions of the imaging optical system, and wherein the imaging device further includes: a correcting unit that obtains the information of the incident light ray angle in the at least two positions corresponding to the set optical condition from the second storing unit and corrects a level difference of the output signals of a pair of the first phase difference detecting pixel and the second pixel difference detecting pixel which is adjacent to the first phase difference detecting pixel using the sensitivity ratio data which is stored in the first storing unit corresponding to the information of the plurality of obtained incident light ray angles; and a defocus amount calculating unit that calculates a defocus amount using the corrected level difference of the output signals of the pair.