MULTILAYER OPTICAL DISK, MULTILAYER OPTICAL DISK RECORDING APPARATUS AND MULTILAYER OPTICAL DISK REPRODUCING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a multilayer optical disk recording apparatus capable of performing stable high speed recording operation with a simple control and to provide a multilayer optical disk reproducing apparatus.

SOLUTION: A multilayer optical disk recording apparatus comprises an optical pickup that emits N (N represents an integer of two or more) laser beams of the same wavelength. The optical pickup emits the N laser beams at the same time, focuses the N laser beams on a first recording layer group alternately configured by N recording layers of the multilayer optical disk and performs a recording operation on the N recording layers at the same time. When changing the recording layers, the optical pickup focuses the N laser beams on a second recording layer group configured by recording layers adjacent to the respective recording layers configuring the first recording layer group and performs a recording operation on the N recording layers at the same time.

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