Patent ID: 8339912
Filing Date: 2012-12-25
Classification: G11B

Abstract:
1. A method of writing a visually detectable pattern of pattern elements at a record carrier by targeting a modulated beam of radiation at the record carrier, comprising the step of selecting at least one pattern element from at least a first and a second pattern element, and writing the selected pattern element at the record carrier, wherein if the first pattern element is selected, the first pattern element is written with a first top radiation power Pt 1 during a first relatively short time interval tm 1 and with a first bottom radiation power Pb 1 during a first relatively long time interval ts 1 , and if the second pattern element is selected, the second pattern element is written with a second top radiation power Pt 2 during a second relatively long time interval tm 2 and with a second bottom radiation power Pb 2 during a second relatively short time interval ts 2 , wherein, when the first and the second pattern element are written at the same speed Pt 1 >Pb 1 , Pt 2 >Pb 2 , tm 1 <ts 1 and tm 2 >ts 2 , and at least Pt 1 differs from Pt 2 and/or Pb 1 differs from Pb 2 .