Methods of determining the optimal erase and write power,...

Details Methods of determining the optimal erase and write power,... Methods of determining the optimal erase and write power,...

G - Physics

11

B

G11B 7/00 (2006.01) G11B 7/0045 (2006.01) G11B 7/0055 (2006.01) G11B 7/125 (2006.01)

Patent

CA 2322589

The application relates to methods and devices for determining the optimal erase (17) and write powers for erasing and writing information on an optical record carrier (85). These optimal powers are determined from two powers, P min (15) and P max (16), found at specific points, (22) and (24), in a curve (10) where the normalized reflected power (12) is plotted versus the test power (11).

L'invention concerne des procédés et des dispositifs qui permettent de déterminer la puissance d'effacement (17) et la puissance d'écriture maximales nécessaires pour effacer et pour écrire des informations sur un support de données optiques (85). Ces puissances maximales sont déterminées à partir de deux puissances, Pmin (15) et Pmax (16), mesurées au niveau de points spécifiques (22, 24) d'une courbe (10) dans laquelle la puissance réfléchie normalisée (12) est définie versus la puissance d'essai (11).

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