| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk device that allows reproduction to be performed from an optical disk having various recording conditions without deteriorating the endurance of reproduction. <P>SOLUTION: In an optical disk device, a microcomputer 1 compares the quality of measured reproduction RF signals with reference values as targets to control the reproduction power of a laser diode 3. When measured RF amplitude levels Henv, Lenv have varied from the reference values, in the case that both a measured modulation degree M and an asymmetry β do not vary from the reference values, the reproduction power of the laser diode is adjusted, and in the case that either of the measured modulation degree M and the asymmetry β varies from the reference values, the reproduction power of the laser diode is not adjusted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
