Optical information recording medium, optical information...

G - Physics – 11 – B

Patent

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G11B 7/007 (2006.01)

Patent

CA 2687697

An optical information recording medium according to the present invention includes a first information recording layer on which information is to be recorded by laser light; and a second information recording layer on which information is to be recorded by the laser light which has passed through the first information recording layer. The first information recording layer includes at least one of a reproduction-only area and a recording and reproduction area. The second information recording layer includes a test recording area. At least one of the reproduction-only area and the recording and reproduction area, and the test recording area is located such that one of the reproduction-only area and the recording and reproduction area includes an area of the first information recording layer through which the laser light for recording information in the test recording area passes.

La présente invention concerne un dispositif d'enregistrement d'informations optiques, qui comprend une première couche d'enregistrement d'informations, sur laquelle lesdites informations doivent être enregistrées au moyen d'un faisceau laser; le dispositif comprend également une seconde couche d'enregistrement d'informations sur laquelle les informations doivent être enregistrées au moyen d'un faisceau laser qui a traversé la première couche d'enregistrement d'informations. La première couche d'enregistrement comprend au moins une zone de reproduction seulement, ainsi qu'une zone d'enregistrement et de reproduction. Le second couche d'enregistrement d'informations comprend une zone d'enregistrement de contrôle. Au moins une zone parmi les zones de reproduction seulement, d'enregistrement et de reproduction et d'enregistrement de contrôle, est situé de telle façon qu'une de ces zones, de reproduction seulement et d'enregistrement et de reproduction comprend une zone de la première couche d'enregistrement d'information que traverse le faisceau laser destiné à enregistrer des informations dans la zone d'enregistrement de contrôle.

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