Patent ID: 8711490
Filing Date: 2014-04-29
Classification: G02B,G03B,H04N

Abstract:
1. A lens system, comprising: a lens unit; a drive unit for driving the lens unit in an optical axis direction, configured such that any one of a first maximum current value serving as a normal state and a second maximum current value larger than the first maximum current value can be set as a maximum current value of a drive current supplied for driving; a detector for detecting a position of the lens unit in the optical axis direction; a lens operation unit for operating driving of the lens unit in the optical axis direction; a computing unit for computing a positional command value and optionally a speed command value, both for controlling driving of the lens unit based on a signal input from the lens operation unit, and controlling the driving of the lens unit; and a timer for measuring a time during which the second maximum current value is continuously set as the maximum current value in the drive unit, wherein in a case in which otherwise, the computing unit sets the first maximum current value as the maximum current value in the drive unit.