Patent ID: 7936657
Filing Date: 2011-05-03
Classification: G11B

Abstract:
1. An apparatus for initializing an optical disc, comprising: a rotating unit that rotates the optical disc and an initialization reference plate having a reference part with the initialization reference plate temporarily fixed to the optical disc, the reference part reflecting at least a part of servo light and containing address information; an information light source that emits information light; a servo light source that emits the servo light; an objective lens that collects the servo light and the information light for irradiation; an objective lens driving unit that drives the objective lens so that the servo light focuses on a desired servo position of the reference part; a focal point separating unit that adjusts spherical aberration of the information light to separate a focal point of the information light from a focal point of the servo light by an arbitrary distance in a depth direction in which the objective lens approaches and draws away from the optical disc; and a control unit that controls the information light source and the objective lens driving unit irradiated with the information light.