Tracking error signal generation device and tracking error...

Details Tracking error signal generation device and tracking error... Tracking error signal generation device and tracking error...

2005-03-01

2008-10-21

Psitos, Aristotelis M (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320

Reexamination Certificate

active

07440364

ABSTRACT:
A detection signal S1outputted from a light reception unit (11A) of detection elements (11) formed by four-division light reception element is added to a detection signal S4outputted from a light reception unit (11D) so as to obtain an addition signal S14and a phase difference signal P1indicating the phase difference between the addition signal S14and the detection signal S1.Furthermore, a phase difference signal P4indicating the phase difference between the addition signal S14and the detection signal S4is obtained. The phase difference signal P4is subtracted from the phase difference signal P1so as to generate a tracking error signal TE1.

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