Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2008-03-18
2008-03-18
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S275300
Reexamination Certificate
active
10561471
ABSTRACT:
A writable optical record carrier comprising a plurality of recording layers L0, . . . , Ln−1 separated by a spacer material, each recording layer comprising an optimum power calibration area having a first portion with an average reflection value representative of a recorded layer and a second portion with an average reflection value representative of an unrecorded layer, a method, and an apparatus for forming optimum power calibration areas on such a writable optical record carrier are presented. The optimum power calibration areas partially overlap such that the optimum power calibration areas of each pair of consecutive recording layers form a step, and the first portions of said plurality of recording layers have the form of a staircase. Each step formed by a pair of consecutive recording layers k, k+1 has a preferred minimum step size.
REFERENCES:
patent: 2002/0136122 (2002-09-01), Nakano
patent: 2003/0185121 (2003-10-01), Narumi et al.
patent: 2005/0232108 (2005-10-01), Shoji et al.
patent: 2006/0203648 (2006-09-01), Lee et al.
patent: 1 244 096 (2002-09-01), None
Koppers Wilhelmus Robert
Martens Hubert Cécile François
Van Den Oetelaar Ronald Joseph Antonius
Woerlee Pierre Hermanus
Belk Michael E.
Bibbins LaTanya
Koninklijke Philips Electronics , N.V.
Young Wayne
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