Patent ID: 8085311
Filing Date: 2011-12-27
Classification: G03B,H04N

Abstract:
1. An optical apparatus having a recording mode for recording a motion picture and a recording mode for recording a still picture, said optical apparatus comprising: an optical element; a motor that includes a rotor having a magnet, and a stator having a coil configured to provide a rotational force to the magnet, the motor being configured to drive the optical element; a position sensor configured to detect a position of the rotor in the motor; a driving circuit configured to select, in accordance with the recording mode, first driving configured to switch an electrization to the coil in the motor in accordance with a determined time interval, or second driving configured to switch an electrization to the coil in the motor in accordance with an output of the position sensor; a control circuit configured to output, via the driving circuit, for the first driving or second driving a driving target signal that defines a target to which the optical element is driven, and a position detector configured to detect a current position of the optical element, wherein the driving circuit is configured to select the first driving or the second driving in accordance with the driving target signal, wherein the driving target signal defines a target position of the optical element, wherein the driving circuit selects the first driving when a target driving amount as a difference between the target position and the current position is smaller than a threshold, or the second driving when the target driving amount is equal to or larger than the threshold, and wherein the driving circuit sets a threshold when the recording mode is set to the recording mode for recording a motion picture larger than a threshold when the recording mode is set to the recording mode for recording a still picture.