Opitical disc device and tracking and slider control method

An optical disc device performing tracking and slider control by turning a tracking servo on at specified timing to perform pull-in of a track on an optical disc, performing tracking after the track pull-in by moving an object lens in a radial direction with respect to the optical disc, and moving a slider in the radial direction with respect to the optical disc based on moving of the objective lens, the optical disc device comprising:

• a disc rotation angle obtaining processing unit for obtaining a rotation angle at which the degree of displacement of the track due to the eccentricity of the optical disc becomes maximum on the inner circumference side and the outer circumference side, and for detecting the eccentricity amount of the optical disc;
• and
• a slider movement processing unit for performing the track pull-in at the rotation angle, at which the degree of displacement of the track due to the eccentricity of the optical disc becomes maximum, detecting a displacement direction of the optical disc at the time of the pull-in, and moving the slider in the detected displacement direction for a distance equal to or almost equal to the eccentricity amount of the optical disc.