Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

G - Physics

11

B

352/32.2

G11B 7/08 (2006.01) G11B 7/085 (2006.01) G11B 7/14 (2006.01) G11B 21/02 (2006.01) G11B 21/10 (2006.01)

Patent

CA 2024360

When a light beam of a reference optical head correctly tracks on the center of a proper track, deviation, due to an optical head assembling error or an optical disk eccentricity, of a light beam of a non-reference optical head from the center of said proper track is memorized in advance as bias information. At a time of a seek control or a track jump control, the non-reference optical head is controlled to move along a track with said bias information, so that not only the reference optical head but also the non-reference optical head correctly track on the proper aimed track, when a seek control or a track jump control is performed. This invention enables both the light beam of the reference optical head and the light beam of the non-reference optical head to correctly track on a proper track without being affected by neither any optical head assembling error nor any optical disk eccentricity.

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