Patent ID: 7444076

Claim:
An imaging device for picking up an image of an object via an optical system and recording image information in a recording medium, a driving system for the optical system being controlled according to a position of an operating unit, the imaging device comprising: a motor driving an object to be controlled by the driving system; a driver driving the motor; absolute position detecting means for detecting a relatively-low-resolution absolute position of the operating unit; relative position detecting means for detecting a relatively-high-resolution relative position of the operating unit; position generating means for generating a position output corresponding to a position in a restricted range of movement of the operating unit using a combination of the absolute position detected by the absolute position detecting means and the relative position detected by the relative position detecting means; wherein the position generating means first initializes a value in a storage region storing the generated position output based on the absolute position detected by the absolute position detecting means; wherein the position generating means, after the initialization, increases or decreases the value in the storage region based on a signal from the relative position detecting means; wherein, if it is determined that the value in the storage region is not defined, the value in the storage region is set as the operating unit position as outputted from the absolute detecting means; and control means for controlling the motor via the driver to drive the object to be controlled according to the generated position output of the operating unit.