Patent ID: 7898916
Filing Date: 2011-03-01
Classification: G11B

Abstract:
1. A recording power determination method for determining a recording power of an optical beam for recording data on an information recording medium, the method comprising: a test data recording step of recording test data on the information recording medium at a plurality of test recording powers; a modulation factor measuring step of reading the test data recorded at each of the plurality of test recording powers, generating a signal, and measuring a modulation factor of the signal corresponding to each of the plurality of test recording powers; a product obtaining step of calculating a product of an n'th power of each of the plurality of test recording powers and the modulation factor corresponding thereto, thereby obtaining a plurality of products corresponding to the plurality of test recording powers, where n is a value of exponent and is a real number other than 1; a first recording power calculating step of calculating a first recording power based on the correlation between the plurality of test recording powers and the plurality of products; and a recording power calculating step of calculating the recording power based on the first recording power, wherein: the recording power determination method further comprising a value reading step of reading a value recorded on the information recording medium; the information recording medium has the value of exponent n recorded thereon; the value reading step includes the step of reading the value of exponent n; and the product obtaining step includes the step of using the read value of exponent n.