| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device capable of stably obtaining high-quality recording or reproducing quality by reducing fluctuations in detection signals caused by stray light in a multilayered optical disk, and an optical disk device. <P>SOLUTION: Of the beams reflected by an optical disk, only peripheral beams excluding the push-pull region are used to generate a DPD signal in order to optimize internal wire connections among the light-receiving areas of the optical detector and thereby reduce the amplification factor of the lens error signal, required for generating the tracking error signal of the DPP method. A beam reflected from a multilayered optical disk is divided into some beam diffraction areas. The divided beam diffraction areas and the light-receiving areas are so arranged that the divided beams focus at different positions on the optical detector and that, when a beam is focused on a target layer, stray light from other than the target recording layer to be reproduced does not enter the servo signal light-receiving area of the optical detector. <P>COPYRIGHT: (C)2011,JPO&INPIT |
