| 摘要 |
<P>PROBLEM TO BE SOLVED: To control the intensity of a laser beam for recording to be emitted in recording data to a recordable optical disk and the intensity of the laser beam for tracking focus control so as to follow stains such as fingerprints stuck to an optical disk recording surface and so as not to follow a recording surface shake or the like. <P>SOLUTION: In a conventional recording power correcting device adaptive to fingerprints and the stains, in order to improve fingerprint and stain detection accuracy, an EFM input interface for receiving space length selection signals, selecting the space length of EFM signals and generating sample-and-hold signals, constitution of correcting write power to a mark generated by a write APC part at the time of fingerprint and stain detection, and an addition part for correcting read power to a space generated by a read APC part at the time of the fingerprint and stain detection are provided. <P>COPYRIGHT: (C)2004,JPO |
