Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2007-01-09
2007-01-09
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275400, C369S044290
Reexamination Certificate
active
10504514
ABSTRACT:
An optical recording medium (D) includes tracks (T) extending along a spiral. The tracks (T) include a plurality of first sections (Ta) and a plurality of second sections (Tb) differing from the first sections with respect to at least one of width and depth. Each of the first sections (Ta) includes a first overlapping portion (11) in which the trailing end and other portion of the first section overlap each other in the tracking direction, the trailing end and the other portion of the first section being located in adjacent tracks. Each of the second sections (Tb) includes a similar configured second overlapping portion (12). Due to such a structure, the beam spot can be easily caused to circulate on the same track of the optical recording medium (D) during idling.
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Fujitsu Limited
Giesy Adam R.
Greer Burns & Crain Ltd.
Young Wayne
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