Patent ID: 7539088
Filing Date: 2009-05-26
Classification: G11B

Abstract:
1. An optical disc recording method of recording information in the form of pits which are formed by irradiating an optical beam along a wobble pregroove of an optical disc under control of a tracking servo loop, the wobble pregroove continuing in a circumferential direction of the optical disc and wobbling in a radial direction of the optical disc such that the wobble pregroove meanders around a mean center line of meandering during the course of continuing in the circumferential direction, the method comprising: a first step of operating the tracking servo loop so as to control a spot of the optical beam for tracking along the mean center line of meandering of the wobble pregroove; a second step of adding a signal corresponding to the wobbling of the wobble pregroove to the tracking servo loop, thereby further controlling the spot of the optical beam to trace the meandering center line of the wobble pregroove; and a third step of modulating a power of the optical beam in accordance with the information to be recorded so that the pits are formed along the meandering center line of the wobble pregroove.