公开(公告)号：US06721248B2

公开(公告)日：2004-04-13

申请号：US09867724

申请日：2001-05-29

申请人： Mitsumasa Kubo ,  Tadao Yamanouchi ,  Yuichi Sakamoto ,  Yoshiyuki Ootsuka

发明人： Mitsumasa Kubo ,  Tadao Yamanouchi ,  Yuichi Sakamoto ,  Yoshiyuki Ootsuka

IPC分类号： G11B700

CPC分类号： G11B7/0948 ,  G11B7/0045 ,  G11B7/0901

摘要： An optical disk unit for recording information on and reproducing information from a disk recording medium by projecting a light beam thereonto includes a signal level detection part detecting a level of a track error signal generated based on reflected light of the light beam from the disk recording medium, a scattered light detection part detecting scattering of the reflected light, and an off-track detection part which detects an off-track of the light beam using detection signals supplied from the signal level detection part and scattered light detection part.

摘要翻译： 一种光盘单元，用于通过在其上投射光束来记录来自盘记录介质的信息和信息，该信号电平检测部分检测基于来自盘记录介质的光束的反射光产生的轨道误差信号的电平 检测反射光的散射的散射光检测部，以及使用从信号电平检测部和散射光检测部提供的检测信号来检测光束的偏离磁道的偏离磁道检测部。