公开(公告)号：EP1014351A2

公开(公告)日：2000-06-28

申请号：EP99310550.1

申请日：1999-12-23

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Suh, Hea-Jung ,  Chung, Chong-Sam ,  Ahn, Young-Man

IPC分类号： G11B7/12

CPC分类号： G11B7/1359 ,  G11B7/005 ,  G11B7/1365 ,  G11B7/1372 ,  G11B7/1398

摘要： An optical pickup capable of reducing cross-talk due to signal interference of adjacent tracks of an optical medium (30) during playback of a radio frequency (RF) signal from a main track of the optical recording medium. In the optical pickup, optical spots can be converged on the main track and the adjacent tracks of the recording medium without a time lag, wherein different polarized component beams are focused as a primary optical spot and secondary optical spots on the main and adjacent tracks, respectively, of the optical recording medium. Thus, the primary optical spot and the secondary optical spots, which have different polarized components, can be separately received by different light receiving portions (45A,45B). Also, the optical spots are photoelectrically converted in the light receiving portions and are differentially amplified through multiplication using a predetermined operation constant, thereby reducing cross-talk from a detected RF signal. For the convergence of optical spots on the adjacent tracks without time lag relative to the optical spot formed on the major track, a beam shaping unit (40) having a shield plate, or transmission or reflection type phase difference prism is adopted.

公开(公告)号：EP1014351A3

公开(公告)日：2001-01-31

申请号：EP99310550.1

申请日：1999-12-23

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Suh, Hea-Jung ,  Chung, Chong-Sam ,  Ahn, Young-Man

IPC分类号： G11B7/12 ,  G11B7/125

CPC分类号： G11B7/1359 ,  G11B7/005 ,  G11B7/1365 ,  G11B7/1372 ,  G11B7/1398

摘要： An optical pickup capable of reducing cross-talk due to signal interference of adjacent tracks of an optical medium (30) during playback of a radio frequency (RF) signal from a main track of the optical recording medium. In the optical pickup, optical spots can be converged on the main track and the adjacent tracks of the recording medium without a time lag, wherein different polarized component beams are focused as a primary optical spot and secondary optical spots on the main and adjacent tracks, respectively, of the optical recording medium. Thus, the primary optical spot and the secondary optical spots, which have different polarized components, can be separately received by different light receiving portions (45A,45B). Also, the optical spots are photoelectrically converted in the light receiving portions and are differentially amplified through multiplication using a predetermined operation constant, thereby reducing cross-talk from a detected RF signal. For the convergence of optical spots on the adjacent tracks without time lag relative to the optical spot formed on the major track, a beam shaping unit (40) having a shield plate, or transmission or reflection type phase difference prism is adopted.

摘要翻译： 一种光学拾取器，其能够在从光学记录介质的主轨道重放射频（RF）信号期间减少由于光学介质（30）的相邻轨道的信号干扰引起的串扰。 在光学拾取器中，光点可以会聚在记录介质的主轨道和相邻的轨道上，而不会出现时滞，其中不同的偏振分量光束被聚焦成主光点并且在主轨道和相邻轨迹上的次光点， 分别为光记录介质。 因此，可以通过不同的光接收部分（45A，45B）分别接收具有不同极化分量的主光点和次光点。 此外，光点在光接收部分中被光电转换，并且通过使用预定的操作常数进行乘法而差分放大，从而减少来自检测到的RF信号的串扰。 为了相对于主轨道上形成的光点而在相邻轨道上的光点的会聚没有时间滞后，采用具有屏蔽板或透射或反射型相位差棱镜的光束整形单元（40）。