Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2005-11-01
2005-11-01
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S120000, C369S044350, C369S044370, C369S044410
Reexamination Certificate
active
06961292
ABSTRACT:
An apparatus generating a seek direction detecting signal includes a light dividing unit dividing an incident light beam into at least two beams having a main beam and a sub-beam so that at least two beam spots including a main beam spot and at least one sub-beam spot having an optical aberration, can be focused in the track direction of an optical disk, the light dividing unit providing that the direction of the optical aberration of the sub-beam spot can be the tangential direction of the optical disk, an optical detector unit, a first signal processing portion processing a track error signal from signals output from the optical detector, a second signal processing portion processing a track cross signal from the signals output from the optical detector, and a generator generating the seek direction detecting signal from the phase difference between the track cross signal and the track error signal.
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Choi Byoung-ho
Chung Chong-sam
Doh Tae-yong
Ma Byung-in
Park In-sik
Patel Gautam R.
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
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