| 摘要 |
PROBLEM TO BE SOLVED: To improve reproducing performance by minimizing the leakage of a wobbling component into a reproducing RF signal. SOLUTION: In accordance with a wobbling component leaked into a reproduced information component (reproducing RF signal), a variable amplifier 43 is controlled for a second reflected light information signal. That is, the amount of amplification at the variable amplifier 43 is controlled so that wobbling components included in the first and second reflected light information signals are equal to each other and, when the first and second reflected light information signals are added to obtain a reproduced information component, the wobbling components are property canceled. Thus, the wobbling component leaked to the reproduced information component is minimized.
|
