Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2005-10-04
2005-10-04
Psitos, A M (Department: 2653)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S047520, C369S053200, C369S275300
Reexamination Certificate
active
06952384
ABSTRACT:
An optical disk apparatus performing either one of recording and reproduction of an optical disk in which groove-shaped groove tracks and land tracks present between the groove tracks are alternately connected to each other in a spiral shape, includes: a recording and reproduction unit for recording a signal in at least one continuous groove track and at least one continuous land track, and then reproducing the signal from the groove track and the land track; a detector for detecting a quality of the signal recorded and reproduced by the recording and reproduction unit; a control parameter setting unit for setting a control parameter related to at least one of the recording and the reproduction of the optical disk; and a controller for changing the control parameter set by the control parameter setting unit, repeating the recording and reproduction performed by the recording and reproduction unit and detection performed by the detector every time the control parameter is changed, and determining the control parameter based on the quality of the signal detected by the detector.
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European Search Report for App. No. 98110109 dated Aug. 6, 2001.
Ishida Takashi
Nakamura Atsushi
Ohara Shunji
Shoji Mamoru
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