Patent ID: 9219854
Filing Date: 2015-12-22
Classification: H04N

Abstract:
1. An imaging device comprising: an objective lens that includes a movable lens that is configured so that an in-focus object plane position is changed along with a change in angle of view; an image sensor that photoelectrically converts an object image formed by the objective lens to acquire an image; a focus control section that implements an autofocus (AF) operation by controlling a position of the movable lens; a reference lens position setting section that sets a reference lens position based on a moving range of the movable lens during a wobbling operation, the reference lens position being a reference position of the movable lens, and the wobbling operation being performed every given cycle during the AF operation; and a magnification correction section that performs a magnification correction process that reduces a change in the angle of view of the image due to a change in the position of the movable lens during the wobbling operation relative to the reference lens position; wherein the focus control section performing a first wobbling operation that moves the movable lens around a first position within a first wobbling width as the wobbling operation in a first wobbling cycle to implement a first AF process, and performing a second wobbling operation that moves the movable lens around a second position within a second wobbling width as the wobbling operation in a second wobbling cycle to implement a second AF process, the second position being set based on a result of the first AF process, and the second wobbling cycle being a wobbling cycle subsequent to the first wobbling cycle.