JP2006294188A5 - - Google Patents

Claims (5)

A method for controlling an optical disk device, which performs tracking control by adding an offset signal to a tracking error signal for a lens that emits laser light toward an optical disk,
When a predetermined part of the optical disk device reaches a predetermined temperature, the lens position that is determined to be the track center and the lens position that is determined to be the track center and the lens position that is determined to be the track center and are determined to be constant on the inner circumferential side in the tracking direction Recording is performed at a position displaced by a distance and a position displaced by a certain distance on the outer peripheral side in the tracking direction with respect to the lens position determined to be the track center, and the recording quality at each of the recorded positions is a predetermined recording quality. Quantifying based on an evaluation index, determining that the lens position having the minimum value is the center in the actual track width direction, and determining the offset signal so as to be the lens position. Control method of optical disk apparatus. A lens that emits laser light toward the optical disc;
Tracking servo control means for moving the lens;
Recording quality digitizing means for digitizing the recording quality after recording on the optical disc based on a predetermined recording quality evaluation index;
Recording quality comparing means for comparing a plurality of values digitized by the recording quality digitizing means;
Control means for controlling the tracking servo control means by adding an offset signal to the tracking error signal,
When the predetermined part of the optical disk apparatus reaches a predetermined temperature, the control means determines that the tracking servo control means determines that the track is centered, and the tracking servo control means determines that the track is centered. A position that is displaced by a certain distance to the inner peripheral side in the tracking direction with respect to the following lens position, and a certain distance on the outer peripheral side in the tracking direction with respect to the lens position that the tracking servo control means determines to be the track center. Recording is performed at the displaced position, and the recording quality of each recorded position is digitized, and the lens position where the digitized value is the minimum is determined as the center in the actual track width direction and becomes the lens position. Thus, the offset signal is determined as described above. 3. The optical disc apparatus according to claim 2, wherein the predetermined recording quality evaluation index is at least one of an error rate and jitter. 3. The optical disc apparatus according to claim 2, wherein the temperature measuring means measures temperature at a constant interval. 3. The optical disc apparatus according to claim 2, wherein the control means does not add the offset signal to the tracking error signal when a recordable area remaining on the optical disc is a predetermined capacity or less.