Patent ID: 7995428
Filing Date: 2011-08-09
Classification: G11B

Abstract:
1. An optical disc apparatus that performs at least either recording or reproducing of information on or from an optical disc by irradiating the optical disc with an optical beam, the optical disc apparatus comprising: an optical head that includes a lens disposed at a position shifted from a traverse axis in a tangential direction and that converges the optical beam onto the optical disc through the lens; a second moving unit that moves the optical head in a direction traversing tracks of the optical disc; a number-of-tracks calculating unit that calculates, as the number of tracks to be sought, the number of tracks that the optical head will traverse when moving from a first address to a second address of the optical disc; a seek controlling unit that moves a convergent point of the optical beam from the first address to the second address of the optical disc; and a number-of-tracks correcting unit that corrects the number of tracks to be sought according to a shift amount of the lens from the traverse axis.