公开(公告)号：US07345820B2

公开(公告)日：2008-03-18

申请号：US11111988

申请日：2005-04-22

申请人： Soo Han Park ,  Seong Su Park ,  Jung Woo Hong ,  Bong Gi Kim

发明人： Soo Han Park ,  Seong Su Park ,  Jung Woo Hong ,  Bong Gi Kim

IPC分类号： G02B5/18 ,  G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/131 ,  G11B2007/0006

摘要： A compatible optical pick-up apparatus, which records to and/or reproduce from both digital versatile disc (DVD)-type optical disks and compact disc (CD)-type optical disks for improving a signal regeneration capacity and a tracking capacity in operation at a high temperature. A polarized hologram of the optical pick-up apparatus is divided into six diffraction regions. The rays of a first light diffracted at the first and second diffraction regions are separately received by divided parts of a first bisected light-receiving portion of a photodetector.

摘要翻译： 一种兼容的光学拾取装置，其记录到数字多功能光盘（DVD）型光盘和光盘（CD）型光盘和/或从其再现，以改善信号再生能力和操作中的跟踪能力 高温。 光学拾取装置的极化全息图被分为六个衍射区域。 在第一和第二衍射区域衍射的第一光的射线被光电检测器的第一二等分的光接收部分的分开的部分分开接收。

公开(公告)号：US08004953B2

公开(公告)日：2011-08-23

申请号：US11950775

申请日：2007-12-05

申请人： Bong Gi Kim

发明人： Bong Gi Kim

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/0903 ,  G11B2007/0013

摘要： An optical pick-up and a disc apparatus having the same. The inferiority of a tracking signal caused by an adjacent layer during the recording and/or reproducing of an optical disc with multiple recording layers is effectively prevented. The optical pickup includes a light source to emit light with a predetermined wavelength, a light collecting unit to collect the light emitted from the light source to form a light spot on a signal recording layer of an optical disc having a plurality of recording layers, a photodetector to receive the light reflected by the optical disc to detect a signal, and an optical member to change the optical transmission of the light reflected by the optical disc according to an incident angle of the reflected light to decrease an optical transmission of a noise light entering the photodetector.

摘要翻译： 光学拾取器和具有该拾取器的盘装置。 有效地防止了在具有多个记录层的光盘的记录和/或再现期间由相邻层引起的跟踪信号的劣势。 光学拾取器包括用于发射具有预定波长的光的光源;聚光单元，用于收集从光源发射的光以在具有多个记录层的光盘的信号记录层上形成光斑; 光接收器，用于接收由光盘反射的光以检测信号;以及光学部件，根据反射光的入射角度改变由光盘反射的光的光透射，以减少噪声光的透射 进入光电检测器。