METHOD AND RELATED OPTICAL DISK ACCESSING APPARATUS FOR CALIBRATING OPTICAL DISK TILT SERVO SYSTEM ACCORDING TO NON-CONSTANT RELATION BETWEEN LOCATIONS AND TILT ANGLES OF OPTICAL DISK

摘要

Method and apparatus for use in an optical disk tilt servo system of an optical disk drive. The tilt servo system is for adjusting an angle between a surface of an optical disk and a pick-up head of the optical disk drive. The method includes: measuring focusing results of the optical disk at multiple locations and estimating tilt angles, i.e. deviation from the horizontal, of the surface of the optical disk according to a physical model that reflects that the optical disk has different tilt angles at different locations. The tilt servo system is calibrated accordingly