Patent ID: 8072865

Claim:
An optical power adjustment method comprising: reading, successively from respective specific areas of at least two recording layers of a multi-layer optical recording medium, control information having first optical power information for a first recording layer and second optical power information for a second recording layer, and storing the read optical power information to a memory, wherein the first and second optical power information is used for an optical power adjustment operation to obtain a write power required to record actual data in a corresponding recording layer and includes reference write power information for at least two different recording velocities, respectively; adjusting an actual write power according to the corresponding recording layer and the corresponding recording velocity, by referring to the optical power information when data recording on a corresponding recording layer at a corresponding recording velocity are required; and if a layer jump operation to a certain recording layer is required, setting an optical power substantially immediately after the layer jump operation to a power appropriate for the certain recording layer based on reference power information for a specific recording velocity stored in the memory, wherein the setting step includes step of obtaining a write power for recording actual data based on the reference power information for the specific recording velocity stored in the memory according to the optical power adjustment operation, wherein the obtained write power is set to the optical power appropriate for the certain recording layer and the specific recording velocity.