Patent ID: 7397735

Claim:
An optical disk device, comprising: an optical pickup configured to irradiate a disk with light and to generate a received light signal based on reflected light from the disk, said optical pickup including a holder, an objective lens held by said holder, an actuator for displacement of said holder in a focus direction, and an impact detecting unit attached to said holder and configured to detect magnitude of an impact applied to said holder; a rotating unit configured to rotate the disk; and an actuator driving unit responsive to the impact detecting unit and having a storage unit configured to store a prescribed value, wherein the actuator driving unit generates a focus error signal based on the received light signal generated by said optical pickup, outputs a drive signal to said actuator based on the focus error signal, and stops the output of the drive signal to said actuator for a prescribed period of time based on a signal from the impact detecting unit when the magnitude of the impact detected by said impact detecting unit exceeds the prescribed value, wherein the prescribed value is determined after insertion of the disk in the optical disk device by adding a prescribed margin to a measured maximum impact value obtained from the impact detecting unit during a period of rotation after the disk is inserted in the optical disk device.