Method of controlling th ewriting power of a laser beam and optical recorder

• Main Authors: GEURTS JORIS HUIBERT JOSEPH, LOOIJMANS HENDRIKUS ALBERTUS JOHANNA
• Format: Patent
• Language: English
• Published: 24.04.2008
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

A method of controlling the writing power of a laser beam in an optical recorder and an optical recorder having means for controlling the writing power of the laser beam are provided. The invention is directed to a Walking Optimum Power Control (Walking OPC) during writing onto an optical storage medium having two storage layers. The method comprises the steps of: incrementing a first counter ( 20 ) when a writing power control is performed with respect to a writing operation onto the first storage layer ( 16 ); incrementing a second counter ( 22 ) when a writing power control is performed with respect to a writing operation onto the second storage layer ( 18 ); calculating a first waiting time between two writing power control operations with respect to the first storage layer ( 16 ) under consideration of the first counter ( 20 ); and calculating a second waiting time between two writing power control operations with respect to the second storage layer ( 18 ) under consideration of the second counter ( 22 ).