公开(公告)号：US20070115525A1

公开(公告)日：2007-05-24

申请号：US11500438

申请日：2006-08-08

申请人： Tae Heor ,  Soo Park ,  Young Ahn

发明人： Tae Heor ,  Soo Park ,  Young Ahn

IPC分类号： G02B26/08

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0013

摘要： An optical pickup device, which reduces the size of an optical spot formed on an optical disk, and prevents the degradation of a tracking error signal due to coherent light from a layer adjacent a target recording/reproducing layer of the optical disk. The optical pickup device includes a light source emitting light at a designated wavelength; an object lens concentrating the light incident from the light source thereupon and forming an optical spot on an optical disk having multiple recording layers; and an optical detector receiving the light reflected by the optical disk and detecting a data signal and an error signal, wherein at least one diffraction pattern region partially diffracting or intercepting the light, emitted from the light source and being incident upon the object lens, and the light, reflected by optical disk and being incident upon the object lens, is formed on the object lens.

摘要翻译： 一种光学拾取装置，其减小了形成在光盘上的光点的尺寸，并且防止由于与来自光盘的目标记录/再现层相邻的层的相干光引起的跟踪误差信号的劣化。 光拾取装置包括以指定波长发光的光源; 物镜聚焦从其上的光源入射的光并在具有多个记录层的光盘上形成光点; 接收由光盘反射的光并检测数据信号和误差信号的光学检测器，其中从光源发射并入射到物镜上的部分衍射或截获光的至少一个衍射图案区域，以及 在物镜上形成由光盘反射并入射在物镜上的光。