Patent ID: 7852721
Filing Date: 2010-12-14
Classification: G11B

Abstract:
1. A method for setting recording power of recording light for an information recording layer of a multilayer optical recording medium to be irradiated with, the method comprising: a low transmittance state evaluation step of evaluating recording power capable of recording information on an information recording layer to be evaluated when all the information recording layer(s) lying closer to a light incident surface than the information recording layer to be evaluated does is/are in a low transmittance state based on the presence or absence of a recording mark; a high transmittance state evaluation step of evaluating recording power capable of recording information on the information recording layer to be evaluated when all the information recording layer(s) lying closer to the light incident surface than the information recording layer to be evaluated does is/are in a high transmittance state based on the presence or absence of a recording mark; and a ground information determination step of determining ground information for setting recording power for use on the information recording layer to be evaluated, based on the recording power evaluated at the low transmittance state evaluation step and the recording power evaluated at the high transmittance state evaluation step.