JP2000311369A5 - - Google Patents

Claims (7)

A disk track is arranged in a meandering, met inclination correction device for correcting the tilt between the head for forming a light spot on the disc,
A photodetector that receives the light reflected by the light spot that moves in the center of the meandering fluctuation, and
As an index the amplitude of the output wobble signal from the optical detector, tilt correction to obtain Bei and tilt control means for said indicators for controlling the relative tilt between the disk and the head to approach extreme apparatus. Before Symbol tilt control means, when said indicator does not exceed the predetermined threshold, the inclination correction device of claim 1 configured to perform tilt control based on the index. Before Symbol tilt control means,
It is configured to control the slope based on the averaged value of the plurality of the indexes.
The tilt correction device according to claim 1 or 2, wherein the index is an index obtained for each recording unit of information recorded on the optical disc. According to any one of claims 1 to 3, the inclination control means is configured to control the inclination based on an average value obtained by averaging a plurality of the indexes obtained within a predetermined time. The tilt correction device described. The tilt control means is
Using the above index as the first index,
The amplitude of the difference signal obtained when the light spot crosses the track is used as a second index.
The tilt correction device according to any one of claims 1 to 4, wherein the tilt is controlled based on the first index or the second index. A disk device including the tilt correction device according to any one of claims 1 to 5. This is a tilt correction method that corrects the tilt between a disc in which tracks are arranged meandering and a head that forms a light spot on the disc.
It receives the light reflected by the light spot moving at the center of the meandering fluctuation and outputs a wobble signal.
A tilt correction method that controls the relative tilt between the disk and the head so that the index approaches an extreme value using the amplitude of the wobble signal as an index.