Patent ID: 9069123
Filing Date: 2015-06-30
Classification: G02B,G03B,H04N

Abstract:
1. A lens device to be mounted on an image-capturing device body, the lens device comprising: a receiving section configured to receive a drive command including both information indicating an optical member to be a drive object and information indicating a drive target showing a target position of the optical member from the image-capturing device body; a driving section configured to include an electric motor and a driving circuit for driving the electric motor, the driving section driving the optical member by using the electric motor and the driving circuit to the drive target with a current equal to or less than a current limit value on the basis of the drive command; and a controller configured to control the driving section, wherein when driving one optical member at a time, the controller sets a first current equal to or more than a rated current of the driving section and equal to or less than a maximum supply current from the image-capturing device body, or a second current less than the rated current of the driving section, for the one optical member as the current limit value, and controls the driving section so that first drive for driving the optical member for a first time by allowing the first current to serve as the current limit value, and second drive for driving the optical member for a second time by allowing the second current to serve as the current limit value after the first drive being performed, are repeated until drive of the optical member to the drive target is completed, wherein the first drive is performed at the beginning of the driving, and wherein the rated current is the level of current permitted to continuously flow within the electric motor.