Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2005-09-12
2008-09-16
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S030110
Reexamination Certificate
active
07426173
ABSTRACT:
In an optical information record medium including a plurality of record layers that are recordable, various signal characteristics with respect to an area X in a record layer A (second layer) among the plurality of record layers are defined under a condition that an area Y in a record layer B (first layer) adjacent to the record layer A (second layer) on an incident side thereof along an optical axis of a light beam shone on the area X is a prerecorded area. This suppresses variation and errors in the measurement of characteristics of various signals caused by the interfering light coming from an adjacent record layer, thereby making it possible to manage and define media parameters with characteristic values having high reliability, compatibility, and reproducibility.
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Dickstein & Shapiro LLP
Dinh Tan X
Ricoh & Company, Ltd.
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