Patent ID: 7518961
Filing Date: 2009-04-14
Classification: G11B

Abstract:
1. An optical disk recording and reproducing apparatus, comprising: a focus unit that focuses an irradiation light beam on an optical disk having a plurality of data recording layers and a plurality of tracks; a drive unit that changes a direction of the irradiation light beam by moving the focus unit; a tilt control unit that detects a tilt amount of the optical disk, computes a control operation amount in a band wider than a rotation frequency of the optical disk based on the tilt amount, and controls the drive unit to move the focus unit based on the control operation amount, the tilt control unit holding a control state of the control at an immediate pre-state of an inter-layer jump in which the irradiation light beam is moved to a different data recording layer or a track jump in which the irradiation light beam is moved to a different track during the inter-layer jump or the track jump.