An optical record carrier

G - Physics – 11 – B

Patent

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Details

G11B 7/007 (2006.01) G11B 7/004 (2006.01) G11B 7/24 (2006.01) G11B 7/26 (2006.01)

Patent

CA 2583163

The present invention relates to an optical record carrier. The optical record carrier has a plurality of tracks disposed substantially spirally and substantially concentrically, each track being adapted for recording and/or reproducing optically readable effects positioned substantially in a groove. In a first aspect, the plurality of tracks are arranged adjacently in a multi- track spiral on the optical record carrier, and a tracking area between the windings of the multi-track spiral is adapted for providing a radial tracking error signal from the optical record carrier. In a second aspect, the plurality of spirals are arranged in concentric consecutive layers similar to an opinion structure on the optical record carrier with one spiral in each layer, and tracking areas between the said layers of the plurality of spirals are adapted for providing a radial tracking error signal from the optical record carrier. The invention also relates to a corresponding optical apparatus and a method for manufacturing a carrier according to the second aspect.

L'invention concerne un support d'enregistrement optique comprenant plusieurs pistes disposées sensiblement en spirale et de manière concentrique, chaque piste étant conçue pour enregistrer et/ou reproduire des effets lisibles optiquement positionnés sensiblement dans une rainure. Selon un premier aspect de l'invention, la pluralité de pistes est disposée adjacente dans une spirale multipiste sur le support d'enregistrement optique, et une zone de piste entre les spires de la spirale multipiste est conçue pour produire un signal d'erreur de lecture radiale à partir du support d'enregistrement optique. Selon un second aspect de l'invention, la pluralité de spirales est disposée en couches consécutives concentriques similaires à une structure d'opinion sur le support d'enregistrement optique avec une spirale dans chaque couche, et les zones de piste entre lesdites couches de la pluralité de spirales sont conçues pour qu'un signal d'erreur de lecture radiale soit produit par le support d'enregistrement optique. L'invention porte également sur un appareil optique correspondant et sur un procédé de fabrication d'un support selon le second aspect.

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