Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2006-08-08
2010-11-30
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S053280
Reexamination Certificate
active
07843776
ABSTRACT:
For achieving pulling operation into tracking servo during seek operation at high-speed and with stability, in timing thereof, even on an optical disk forming lands and grooves on a recording surface thereof, in a seek control method, according to the present invention, for moving an optical spot onto an arbitrary track through movement of an optical pickup110into the radial direction on the optical disk forming the lands and the grooves, thereby forming a track on the recording surface thereof, in particular, in the seek operation, measurement is made on a period of a tracking error (TE) signal generated due to the movement in the radial direction, and a time point when the measured period of the tracking error signal exceeds a predetermined value is determined to be a starting point for pulling the optical spot of the optical pickup into the track, through the tracking servo, thereby pulling it selectively, into either one of the land and the groove building up the track.
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Kataoka Takeyoshi
Takeda Nobuhiro
Toda Tsuyoshi
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Hitachi-LG Data Storage, Inc.
Huber Paul
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