Patent ID: 9191565
Filing Date: 2015-11-17
Classification: G02B,G03B,H04N

Abstract:
1. A lens unit capable of being removably mounted on an image pickup apparatus including an image pickup element configured to perform photoelectric conversion of an object image formed by an image pickup optical system, a focus signal generator configured to generate a focus signal indicating a focus state of the image pickup optical system using an output from the image pickup element, and an image pickup apparatus controller configured to generate control information used for a vibration control that vibrates a correction lens and also moves a vibration center of the correction lens in a direction where the focus signal increases, the lens unit comprising: the image pickup optical system including a magnification varying lens configured to perform a magnification varying operation and the correction lens configured to correct an image plane variation caused by a movement of the magnification varying lens; a storage unit storing first information that indicates a relation between a position of the magnification varying lens and a position of the correction lens for each object distance; and a lens controller configured to control a communication with the image pickup apparatus and perform a predetermined control in which the correction lens moves in accordance with the movement of the magnification varying lens based on the first information, wherein the lens controller sends information relating to the magnification varying operation to the image pickup apparatus, and overlaps the vibration control of the correction lens based on the control information generated by the image pickup apparatus in accordance with the information relating to the magnification varying operation with the predetermined control, wherein the control information contains third information that indicates whether the control information corresponds to the information relating to the magnification varying operation, and wherein the lens controller moves the correction lens by overlapping the vibration control with the predetermined control when the third information corresponds to the information relating to the magnification varying operation, and moves the correction lens without overlapping the vibration control with the predetermined control when the third information does not correspond to the magnification varying operation.