Patent ID: 6882610
Filing Date: 2005-04-19
Classification: G11B

Abstract:
1. An optimal power calibration (OPC) method for an optical disc of an optical system, the optical disc including a power calibration area which has a count area and a test area, the count area having a plurality of counting units, the test area having a plurality of test blocks corresponding to each of the counting units for printing test data, the method comprising: generating a plurality of first power levels by using an indicated power; selecting a plurality of second power levels from the first power levels; recording test data onto test blocks with the second power levels; reading the test blocks and generating data signals and first beta values; generating an estimated optimal power by a calculating algorithm; generating a plurality of third power levels by using the estimated optimal power; recording test data onto test blocks with the third power levels; reading the test blocks and generating data signals and second beta values; generating an optimal power from the estimated optimal power, the first beta values and the second beta values.