Optical disk device

Details Optical disk device Optical disk device

2006-05-23

2006-05-23

Edun, Muhammad (Department: 2656)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S047500, C369S047480, C369S053230

Reexamination Certificate

active

07050363

ABSTRACT:
An optical disk device for writing data onto an optical disk having a wobble track comprises an optical pickup for irradiating laser light of a writing power and laser light of a replaying power onto an optical disk and for converting return light from the optical disk into an electrical signal, a filter for extracting a wobble component contained in the return light signal when the laser of a writing power is irradiated, a processor for detecting the direction of track deviation based on the phase of the wobble component, and an actuator for driving the optical pickup in the width direction of the track based on the direction of the track deviation in order to control the tracking. Because the phase of the wobble component differs for a case when a light spot is deviated radially inward and for a case when a light spot is deviated radially outward, the direction of the track deviation can be detected based on the phase of the wobble component and the tracking can be controlled during data writing.

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