OPTICAL INFORMATION RECORDING MEDIUM REPRODUCING DEVICE AND METHOD FOR CONTROLLING SAME

摘要

In an optical information recording medium reproducing device (10) for reproducing an optical information recording medium in which information recording layers each including a recording mark having a length shorter than a resolution limit of an optical system are stacked, reproduction laser power for reproducing an optical recording layer closest to a reproduction laser incident surface is set lower than reproduction laser power for reproducing an information recording layer farthest from the reproduction layer incident surface and equal to or higher than the minimum reproduction laser power satisfying a reproduction signal characteristic required by the optical information recording medium reproducing device (10). Thus, when an information recording layer close to the reproduction laser incident surface is reproduced, the information recording layer can be prevented from being mistakenly irradiated with a reproduction laser with high reproduction layer power, and thereby a good reproduction quality can be obtained. The optical information recording medium reproducing device (10) enabling determination of optimum reproduction laser power and stable super-resolution reproduction can be realized.