Optical information recording medium, optical information...

G - Physics – 11 – B

Patent

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Details

G11B 7/007 (2006.01) G11B 7/002 (2006.01) G11B 7/004 (2006.01) G11B 7/24 (2006.01)

Patent

CA 2658113

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 par la lumière laser, ainsi qu'une seconde couche d'enregistrement d'informations sur laquelle les informations doivent être enregistrées par la lumière laser qui a traversé la première couche. Cette première couche d'enregistrement d'informations comprend au moins une zone de reproduction seulement et une zone d'enregistrement et de reproduction. La seconde couche d'enregistrement d'informations comprend une zone d'enregistrement de contrôle. Au moins une des zones de reproduction seulement et des zones d'enregistrement et de reproduction d'informations, ainsi que la zone d'enregistrement de contrôle, sont situées de telle sorte que l'une des zones de reproduction seulement et des zones d'enregistrement et de reproduction comprend une zone de la première couche d'enregistrement d'informations que traverse la lumière laser pour enregistrer des informations dans la zone d'enregistrement.

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