Patent ID: 7298389

Claim:
A method of drawing a visible image on an optical disk with an optical pickup having an objective lens and a focus actuator, the optical pickup being adapted to irradiate an optical beam onto the optical disk through the objective lens, a servo controller providing a focusing servo control and a tracking servo control of the optical pickup, the optical disk having a target layer on which the visible image is to be drawn, the method comprising the steps of: rotating the optical disk; applying an oscillation signal to the focus actuator of the optical pickup to oscillate the objective lens along an optical-axis direction thereof so that a focus point of the optical beam recurrently passes through the target layer of the optical disk while both the focusing servo control and the tracking servo control of the optical pickup are stopped; and controlling a power of the optical beam to form a recording spot on the target layer each time the focus point of the optical beam passes through the target layer so that a visible light property of the target layer is changed to thereby form the visible image on the target layer while both the focusing servo control and the tracking servo control of the optical pickup are stopped.