Patent ID: 7457215

Claim:
A method for reproducing data recorded in an optical recording disc comprising a multi-layered body formed by forming a decomposition reaction layer containing noble metal oxide as a primary component and a light absorption layer so as to sandwich at least a dielectric layer therebetween by irradiating a laser beam onto the optical recording disc formed with a recording mark train including at least one of a recording mark having a length shorter than a resolution limit and a blank region having a length shorter than the resolution limit therein, the method comprising steps of: determining an optimum read power of the laser beam at a first readout linear velocity and determining an optimum read power of the laser beam at a second readout linear velocity higher than the first readout linear velocity prior to reproducing data from the optical recording medium; and determining an optimum read power of the laser beam at a readout linear velocity between the first readout linear velocity and the second readout linear velocity based on the optimum read power of the laser beam at the first readout linear velocity and the optimum read power of the laser beam at the second readout linear velocity when data are to be reproduced from the optical recording disc; and changing a power of the laser beam in accordance with a readout linear velocity at which data are to be reproduced from the optical recording disc.