Patent ID: 8064303
Filing Date: 2011-11-22
Classification: G11B

Abstract:
1. A method for setting an optimum value of a write parameter for use in an optical recording apparatus for writing information on an optical recording medium by means of a radiation beam, the method comprising the steps of: 1) writing a series of test patterns on the recording medium, each pattern being written with a different value of a write power level (P) of the radiation beam, 2) reading the test patterns from the recording medium so as to form corresponding read signal portions, and 3) deriving a value of a read parameter from each read signal portion, 4) curve-fitting a plurality of functions, each function defining a relation between the read parameter and the write power level (P), to associated values of the read parameter and the write power level (P), each curve-fitting function having a corresponding initial value of write power level (P 5) deriving a corresponding plurality of characteristic write power levels (P 6) setting an optimum value of a write parameter by comparing the plurality of initial values of write power levels (P