Patent ID: 7463429
Filing Date: 2008-12-09
Classification: G02B,G03B

Abstract:
1. An optical apparatus comprising: an optical system including a first movable lens unit and a second movable lens unit that are independently movable in an optical axis direction; and a controller causing the first movable lens unit to wobble in the optical axis direction based on contrast information generated from an image signal for obtaining information relating to an in-focus position, wherein the optical system satisfies the following condition: where tk represents a distance from a position of an image plane of the optical system to a position of an exit pupil thereof when the position of the exit pupil is closest to the position of the image plane, L represents an effective diagonal length of an image at the position of the image plane, and wherein the controller causes the second movable lens unit to wobble in the optical axis direction to reduce variation of the position of the exit pupil in association with the wobbling of the first movable lens unit.