Method and apparatus for adjusting position of optical element

An apparatus for adjusting a position of an optical element, the apparatus comprising:

• a support;
• a movement unit for supporting an optical element and being movable relative to the support;
• a magnet unit disposed on one selected from the group consisting of the support and the movement unit;
• a coil unit disposed on the other of the group consisting of the support and the movement unit to correspond to the magnet unit for generating a magnetic force for moving the movement unit when an electrical signal is applied;
• a sensor unit disposed in a position corresponding to the magnet unit for detecting a relative position of the movement unit with respect to the support;
• a locking unit for limiting or allowing movement of the movement unit;
• and
• a controlling unit connected to the coil unit for controlling the coil unit and determining whether the movement unit is in a state where movement of the movement unit is limited by the locking unit, based on a signal output from the sensor unit.