Patent ID: 6249496
Filing Date: 2001-06-19
Classification: G11B

Abstract:
An optical storage apparatus comprising:an actuator for moving an objective lens to irradiate a laser beam onto a medium in a direction traversing tracks on said medium;a tracking error signal forming unit for forming a tracking error signal according to a position of said laser beam in the direction traversing the tracks on the basis of a photosensitive output of medium return light;a seek control unit for moving the laser beam to a target track by a control of said actuator;an on-track control unit for allowing the laser beam to trace the target track by the control of said actuator based on said tracking error signal; anda correction processing unit for discriminating an interval in which a signal fluctuation appears on said tracking error signal when the laser beam passes an ID area on the medium track during an on-track control and for correcting the tracking error signal so as to reduce the signal fluctuation in said discrimination interval.