Optical disk inspection device and inspection method
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United States of America Patent
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Sep 18, 2012
Grant Date -
Apr 15, 2010
app pub date -
Oct 15, 2009
filing date -
Oct 15, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is provided an optical disk device which quickly inspects the presence or absence of a defect in an optical disk in order to ensure that it can be played back on various types of optical disk devices. A detection unit uses signals supplied from a playback unit to detect defects from each of an RF signal, a focus error signal, and a tracking error signal. A CPU stores positions of the defects in a memory. The playback unit plays back data while degrading playback conditions at the positions of the defects . The detection unit detects an error rate of the played-back data, and finally determines whether the optical disk is “OK” or “NG”.
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