Anti-chipping recording disc, reading method and recording head

Details Anti-chipping recording disc, reading method and recording head Anti-chipping recording disc, reading method and recording head

G - Physics

11

B

G11B 7/007 (2006.01) G11B 20/00 (2006.01) G11B 23/28 (2006.01)

Patent

CA 2304686

The invention concerns a data recording disc comprising a main recording track including one ore several breaks and/or groove changes, which gives rise to a non-sequential reading thereby making such data hardly accessible. A hard copy of such a disc becomes extremely difficult, thereby enabling the detection of counterfeits by data detection and making any copy useless.

Disque d'enregistrement d'informations comprenant une piste d'enregistrement principale comportant une ou plusieurs interruptions et/ou changements de spires, ce qui donne lieu à une lecture non séquentielle et donc à des informations difficilement accessibles. La recopie d'un tel disque par les moyens classiques devient très difficile ce qui permettra d'une part de détecter les contrefaçons par détection des informations et d'autre part de rendre inutilisable toute copie.

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