Patent ID: 9470875
Filing Date: 2016-10-18
CPC Classification: G02B,G03B,H04N

Claim Text:
1. An image pickup device comprising: a photographing optical system having a central optical system disposed at a central region and a circular optical system disposed at an outer portion of the central optical system which are arranged along the same optical axis; a directional sensor having plural pixels including two-dimensionally arranged photoelectric conversion elements, the directional sensor including plural pixels for selectively receiving light beams of light fluxes which are incident via the central optical system and the circular optical system by applying pupil division; and an image readout device that acquires from the directional sensor each of an image signal representing a first image received via the central optical system and an image signal representing a second image received via the circular optical system, wherein the directional sensor having directional characteristics depending on pupil shapes of the central optical system and the circular optical system at an image surface position is used, wherein the directional sensor has a microlens serving as a pupil division device, the microlens dividing a pupil image and each divided pupil image entering the pixel, and the number of the pixels allocated to one microlens decreases as an image height increases.