| 摘要 |
Provided are a recording/reproducing device, which can reduce the low-frequency noises at the time of reproducing a superhigh-resolution optical disk containing a small recording mark of a diffraction limit or less, thereby to improve the quality of a reproduced signal, and an optical disk. The light reflected from the optical disk is received, after it was divided into a peripheral portion and a central portion, and these individual reflected lights are given different gains and are synthesized to generate reproduced signals. The gain values are adjusted or set on the basis of the reception quantities or low-frequency noise quantities ofthe individual receiving areas, or an optical head device is optically adjusted to suppress the low-frequency noises to the optimum. Moreover, the optical disk is equipped with a specific area for performing the aforementioned adjustment.
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