Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2006-03-21
2006-03-21
Hindi, Nabil (Department: 2655)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044370
Reexamination Certificate
active
07016271
ABSTRACT:
An optical recording/reproducing apparatus comprises a light beam emitting unit which emits a plurality of light beams to the recording medium, a photodetection unit which detects the reflected light beams and output detection signals, a detection signal selection unit which selects one of the detection signals according to one of a plurality of tracks which is selected in order to record or reproduce data, the tracks being formed on at least one of the land and the groove, and a tracking control unit which make one of the light beams trace the track which is selected in order to record or reproduce data, according to the selected detection signal.
REFERENCES:
patent: 5210730 (1993-05-01), Hayashi et al.
patent: 5708636 (1998-01-01), Takahashi et al.
patent: 5815473 (1998-09-01), Takahashi et al.
patent: 5936920 (1999-08-01), Noda
Hindi Nabil
Kabushiki Kaisha Toshiba
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