Multi-layer writable optical record carrier with an optimum power calibration area, and method and apparatus for forming optimum power calibration areas on such a record carrier

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 port...

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Bibliographic Details
Main Authors VAN DEN OETELAAR RONALD JOSEPH ANTONIUS, WOERLEE PIERRE HERMANUS, MARTENS HUBERT CECILE FRANCOIS, KOPPERS WILHELMUS ROBERT
Format Patent
LanguageEnglish
Published 18.03.2008
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary: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.
Bibliography:Application Number: US20040561471