Patent ID: 7218588

Claim:
A disk apparatus comprising: an irradiation unit configured to irradiate a recording surface of a disk with a light beam; a reflected light detection unit configured to detect reflected light of the light beam irradiated by the irradiation unit; a focus control unit configured to control focus on the basis of a focus control signal generated from the reflected light detected by the reflected light detection unit; a tilt amount detection unit configured to specify a plurality of regions with different radial positions on the disk, and to detect tilt amounts of respective regions with respect to an optical axis of the light beam irradiated by the irradiation unit on the basis of the focus control signal; a tilt correction unit configured to calculate tilt correction values for respective regions in accordance with the tilt amounts of the respective regions detected by the tilt amount detection unit, and correct a tilt of the optical axis with respect to a predetermined region on the basis of the tilt correction value corresponding to the predetermined region; a recording unit configured to record data on the predetermined region while the tilt of the optical axis with respect to the predetermined region is corrected by the tilt correction unit; and a recording control unit configured, when data is continuously recorded on first and second, successive regions, to: correct the tilt of the optical axis with respect to the first region based on a first tilt correction value using the tilt correction unit, record data by tracing the light beam from the leading end to the trailing end of the first region by the first tilt correction value, temporarily interrupt recording, return tracing of the light beam to the first region and correct the tilt of the optical axis with respect to the first region based on a second tilt correction value using the tilt correction unit while tracing the light beam from the first region toward the leading end of the second region, and record data by tracing the light beam from the leading end to the trailing end of the second region by the second tilt correction value.