Imaging device, endoscope apparatus, and method for controlling imaging device

An endoscope apparatus comprising:

• an imaging optical system that includes a movable lens that is configured so that an in-focus object distance is changed along with a change in angle of view;
• an image sensor;
• a plurality of phase sensors;
• an acquisition section that acquires phase information from the plurality of phase sensors;
• a lens control section that controls a position of the movable lens;
• and
• a moving amount calculation section that calculates a moving amount of the movable lens necessary for implementing an in-focus state of an image formed on the image sensor due to light beams that have passed through the imaging optical system, based on a phase difference that is based on the phase information acquired by the acquisition section,
• the lens control section controlling the position of the movable lens based on the moving amount calculated by the moving amount calculation section.

A method for controlling an imaging device comprising:

• acquiring phase information from a plurality of phase sensors;
• calculating a moving amount of a movable lens necessary for implementing an in-focus state of an image formed on an image sensor due to light beams that have passed through an imaging optical system, based on a phase difference based on the acquired phase information;
• and
• controlling a position of the movable lens based on the calculated moving amount,
• the movable lens being a lens that is included in the imaging optical system and configured so that an in-focus object distance is changed along with a change in angle of view.