Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2006-05-30
2006-05-30
Tran, Thang V. (Department: 2653)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S275400
Reexamination Certificate
active
07054239
ABSTRACT:
An information recording medium comprises a read-out track having a data region forming data bits for reproduced data and a servo pattern region forming servo bits for tracking control. The servo bits have a first groove that is deep in a direction perpendicular to both a length of the read-out track and a depth of the information recording medium, and a second groove that is deep in a direction opposite to the first groove and having a depth gradually increasing along the read-out track.
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Chiba Norio
Kasama Nobuyuki
Kato Kenji
Maeda Hidetaka
Mitsuoka Yasuyuki
Adams & Wilks
Seiko Instruments Inc.
Tran Thang V.
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