Patent ID: 7921435
Filing Date: 2011-04-05
Classification: G11B

Abstract:
1. An optical disk drive comprising: an optical pickup including a light source that radiates a light beam to irradiate an optical disk, at least one objective lens for converging the light beam, and an actuator that is able to move the objective lens perpendicularly to the optical disk; transport means for displacing the optical pickup along the radius of the optical disk; sensing means for sensing if a beam spot position has passed a raised rim portion of the optical disk while the optical pickup is being displaced from an inner area of the optical disk toward the raised rim portion thereof by the transport means; and control means for getting the objective lens retracted away from the optical disk by the actuator and getting the optical pickup displaced toward the inner area of the optical disk by the transport means if a beam spot position has been sensed to have passed the raised rim portion of the optical disk.