Tracking error detection device and tracking error detection...

Details Tracking error detection device and tracking error detection... Tracking error detection device and tracking error detection...

2007-10-02

2007-10-02

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044410, C369S044290

Reexamination Certificate

active

10782799

ABSTRACT:
A tracking error detection device for an optical disk apparatus comprises a detecting unit which includes at least two detectors and detects a reflected light from a series of pits formed on an optical disk, a phase comparing unit which detects a phase difference of outputs of the at least two detectors, and a low-pass filter which smoothes an output of the phase comparing unit, a cut-off frequency of the low-pass filter being higher than a frequency at which a spectrum of a modulation code recorded in the optical disk becomes −10 dB and lower than a frequency at which the spectrum of the modulation code recorded in the optical disk becomes −5 dB.

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