公开(公告)号：US07403458B2

公开(公告)日：2008-07-22

申请号：US10766328

申请日：2004-01-29

申请人： Ji-hwan Lim ,  Ju-hyung Lee ,  Pyong-yong Seong ,  Eun-goo Kim ,  Chun-gi Kim ,  Kyoung-hwan Park

发明人： Ji-hwan Lim ,  Ju-hyung Lee ,  Pyong-yong Seong ,  Eun-goo Kim ,  Chun-gi Kim ,  Kyoung-hwan Park

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/123 ,  G11B7/1275 ,  G11B2007/0006

摘要： A compatible optical pickup, including first and second light sources for emitting lights with different wavelengths and first and second photodetectors for detecting an information signal and/or an error signal, and a method of detecting the amount of output light using the compatible optical pickup. The first and second photodetectors monitor the amount of light output from the second and first light sources respectively such that no extra front photodetectors are required. Thus, the number of optical component parts included in the optical pickup can be reduced, thereby lowering the manufacturing costs for the optical pickup. Also, there is no need to secure a space in a base where a front photodetector is to be installed, so the base is simplified. Thus, inferior moldings are reduced, and the durability of a mold can be prolonged.

摘要翻译： 一种兼容的光学拾取器，包括用于发射具有不同波长的光的第一和第二光源以及用于检测信息信号和/或误差信号的第一和第二光电检测器，以及使用兼容光学拾取器检测输出光量的方法。 第一和第二光电检测器分别监测从第二和第一光源输出的光量，使得不需要额外的前光检测器。 因此，可以减少包括在光学拾取器中的光学部件的数量，从而降低光学拾取器的制造成本。 此外，不需要固定要安装前光电检测器的基座中的空间，因此基座被简化。 因此，较差的模制品减少，并且可以延长模具的耐久性。

公开(公告)号：US07420895B2

公开(公告)日：2008-09-02

申请号：US10746147

申请日：2003-12-29

申请人： Eun-goo Kim ,  Chun-gi Kim ,  Kyoung-hwan Park ,  Ji-hwan Lim

发明人： Eun-goo Kim ,  Chun-gi Kim ,  Kyoung-hwan Park ,  Ji-hwan Lim

IPC分类号： G11B7/00

CPC分类号： G11B7/0903

摘要： A method and apparatus for detecting a signal to determine on-track/off-track and/or a track cross direction, using a detection signal corresponding to a reflected main light beam and detection signals respectively corresponding to reflected first and second sub light beams, and an optical recording and/or reproducing apparatus using the same are provided. When detection signals respectively corresponding to one side portions, in a direction corresponding to a radial direction of the optical information storage medium, of the respective main light beam and first and second sub light beams are referred to as a first main signal, a first sub signal, and a second sub signal, respectively, the method and apparatus include obtaining a first operational signal, which is used to determine on-track/off-track and/or a track cross direction, by performing a subtraction on the combination of the first and second sub signals, and the first main signal.

摘要翻译： 一种用于使用与反射的主光束相对应的检测信号和分别对应于反射的第一和第二子光束的检测信号来检测信号以确定轨道上/离开轨道和/或轨道横向的方法和装置， 并提供使用其的光学记录和/或再现装置。 当分别对应于相应于主光束和第一和第二子光束的与光学信息存储介质的半径方向相对应的一个侧面的检测信号被称为第一主信号时，第一子信号 信号和第二子信号，所述方法和装置包括获得用于确定轨道/离轨和/或轨道横向的第一操作信号，通过对 第一和第二子信号，以及第一主信号。

公开(公告)号：US07251209B2

公开(公告)日：2007-07-31

申请号：US10424821

申请日：2003-04-29

申请人： Yong-jun Cho ,  Pyong-yong Seong ,  Seung-man Han ,  Hyun-seob Choi ,  Eun-goo Kim ,  Jong-koog Lee ,  Kun-soo Kim ,  Chun-gi Kim

发明人： Yong-jun Cho ,  Pyong-yong Seong ,  Seung-man Han ,  Hyun-seob Choi ,  Eun-goo Kim ,  Jong-koog Lee ,  Kun-soo Kim ,  Chun-gi Kim

IPC分类号： G11B7/135

CPC分类号： G11B7/1263 ,  G11B7/1275 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup for a recording medium includes a light source, an objective lens, a main photodetector, and a front photodetector. The configuration of the optical pickup enables converging or diverging of light to be incident on a plate beam splitter so that light can be received at an effective light receiving region of a front photodetector without interference due to internal reflection occurring in the plate beam splitter. In the alternative, a wedge beam splitter in the optical pickup includes first and second mirror planes at a predetermined angle to transmit and reflect incident light at a predetermined ratio. In the optical pickup, an amount of light that is exactly proportional to an output power of the light source can be detected, where the output power of the light source can be accurately controlled, thereby improving a linearity of the output power of the light source.

摘要翻译： 用于记录介质的光学拾取器包括光源，物镜，主光电检测器和前光电检测器。 光拾取器的配置使得入射到平板光束分离器上的光会聚或发散，使得可以在前光电检测器的有效光接收区域处接收光，而不会由于在板分光器中发生内反射而受到干扰。 或者，光学拾取器中的楔形光束分离器包括预定角度的第一和第二反射镜平面，以预定比例透射和反射入射光。 在光学拾取器中，可以检测与光源的输出功率正好成正比的光量，其中可以精确地控制光源的输出功率，从而提高光源的输出功率的线性 。