Patent ID: 7839741

Claim:
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 patterns so as to form corresponding read signal portions; 3) deriving a value of a read parameter from each read signal portion; 4) curve-fitting a straight line 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), the curve-fitting straight line having a initial value of write power level (P ini ); 5) obtaining a characteristic write power level (P char ) from the curve-fitting straight line, and assessing if the characteristic write power level (P char ) qualify as an optimum value of a write parameter; and if the characteristic write power level (P char ) does not qualify as an optimum value of a write parameter then start 6) obtaining one or more characteristic write power levels (P char, n ) by an iteration procedure, where the subsequent initial values of write power level (P ini, n ), are given by P ini,n+1 =AP ini,n +(1− A ) P char,n , where A is a constant between 0 and 1, and n is an integer.