Optical information storage medium reproduction apparatus and control method of the same
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United States of America Patent
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Jul 1, 2014
Grant Date -
Jun 13, 2013
app pub date -
Jan 15, 2013
filing date -
Oct 19, 2007
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Abstract
In an optical information storage medium reproduction apparatus for reproducing an optical information storage medium including a plurality of information recording layers each including a recording mark having a length shorter than an optical system resolution limit, reproduction laser power for reading an information recording layer closest to a reproduction-laser-incident surface of the optical information storage medium is set to be lower than reproduction laser power for reading an information recording layer farthest from the reproduction-laser-incident surface but not lower than minimum reproduction laser power that satisfies a reproduction signal
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