Method for triggering through disc grooves and related...

G - Physics – 11 – B

Patent

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G11B 7/24 (2006.01) G01N 21/59 (2006.01) G01N 35/00 (2006.01) G11B 7/007 (2006.01)

Patent

CA 2471017

An optical analysis disc includes grooves defining corresponding laser- readable tracks and trigger marks that identify respective target regions on the disc. The trigger marks are implemented as a radial interruption of the grooves to thereby produce an increased reflection of a laser beam. There is also provided an optical analysis disc system including a trigger mechanism having a trigger detector adapted to detect interruptions in grooves of an optical analysis disc. A related method for triggering through interrupted grooves of an optical analysis disc includes detecting interruption in the grooves, generating an electrical reflection signal corresponding to the interruptions detected, and elaborating said reflection signal, so that to generate a trigger signal.

L'invention concerne un disque d'analyse optique comprenant des rainures formant des pistes correspondantes lisibles au laser et des marques de déclenchement qui identifient des régions cibles respectives sur le disque. Ces marques de déclenchement sont disposées comme une discontinuité radiale des rainures de manière à produire une réflexion accrue d'un faisceau laser. Cette invention a également pour objet un système de disque d'analyse optique comportant un mécanisme déclencheur doté d'un détecteur de déclenchement conçu pour détecter des discontinuités dans des rainures d'un disque d'analyse optique. Un procédé associé de déclenchement par le biais des rainures discontinues d'un disque d'analyse optique consiste à détecter une discontinuité dans les rainures, à engendrer un signal de réflexion électrique correspondant aux discontinuités détectées, et à élaborer ledit signal de réflexion, de manière à générer un signal de déclenchement.

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