OPTIMUM POWER CONTROL FOR MULTILAYER OPTICAL DISC

摘要

A method of recording information on a multilayer record carrier includes a power control procedure for setting the writing power of a recording beam fo r a lower recording layer (41). First an upper area in an upper recording laye r (40), i.e. the recording layer closest to the laser entry side of the record carrier, is recorded. Secondly a power control zone (60) is located on the lower recording layer such that the upper area substantially covers a radial position range on the upper recording layer corresponding to a radial positi on range of the power control zone on the lower recording layer (41). Finally a n optimum power control (OPC) procedure for setting the writing power of the beam for the lower recording layer is performed by writing a test pattern of marks in the power control zone.