Method and apparatus for retrieving information from a 3d...

G - Physics – 11 – B

Patent

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G11B 7/005 (2006.01) G11B 7/004 (2006.01) G11B 7/09 (2006.01) G11B 7/24 (2006.01)

Patent

CA 2478419

A method and apparatus for retrieving information from a three dimensional storage medium uses a three dimensional storage medium having an active medium capable of exhibiting first and second states, a data unit being represented by the ratio between the concentration of the first and second states in a given volume portion of the medium and a data sequence is represented by a sequence of data units. The active medium is irradiated with light as to concentrate light flux through a volume portion of the storage medium so as to generate in the volume portion a detectable non-linear optical response characteristic of the concentration ratio, which is detected and used for tracking.

L'invention concerne un procédé et un appareil permettant d'extraire des informations d'un support de stockage tridimensionnel, consistant à utiliser un support de stockage tridimensionnel ayant un support actif susceptible de présenter des premier et des second états, une unité de données représentée par un rapport entre la concentration des premier et seconds états dans une partie volume donnée du support et une séquence de données représentée par une séquence d'unités de données. Le support actif est irradié avec de la lumière de manière à concentrer le flux lumineux à travers une partie volume du support de stockage de façon à générer dans ladite partie une caractéristique de réponse optique non linéaire détectable du rapport de concentration, qui est détectée et utilisée au niveau du repérage.

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