-
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
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：EP1096483A2
公开(公告)日：2001-05-02
申请号：EP00309141.0
申请日：2000-10-17
IPC分类号： G11B7/135
CPC分类号： G11B7/1376 , G11B7/13922
摘要： An optical pickup capable of effectively reducing chromatic aberration is provided. In the optical pickup, a collimating lens (103) including a diverging lens (103b) with diverging power and a focusing lens (103a) with focusing power is arranged on the optical path between a light source (104) and an objective lens (101), wherein assuming that the total focal distance of the collimating lens is f and the focal distance of the diverging lens is fn, the collimating lens satisfies the relationship -1.5 > f/fn . The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which are not standardized yet, but need a blue light source near 405nm and an objective lens having a numerical aperture of 0.6 or more.
摘要翻译： 提供了能够有效地降低色差的光学拾取器。 在光拾取器中，在光源（104）和物镜（101）之间的光路上配置有具有发散光焦度的发散透镜（103b）和具有聚焦功率的聚焦透镜（103a）的准直透镜（103） ），其中假设准直透镜的总焦距为f，发散透镜的焦距为fn，准直透镜满足关系-1.5> f / fn。 光拾取器与现有的数字多功能盘（DVD）和尚未标准化但需要405nm附近的蓝色光源的数字通用盘（DVD）和数字孔径为0.6的物镜兼容， 更多。
-
公开(公告)号：EP1096483A3
公开(公告)日：2003-04-23
申请号：EP00309141.0
申请日：2000-10-17
CPC分类号： G11B7/1376 , G11B7/13922
摘要： An optical pickup capable of effectively reducing chromatic aberration is provided. In the optical pickup, a collimating lens (103) including a diverging lens (103b) with diverging power and a focusing lens (103a) with focusing power is arranged on the optical path between a light source (104) and an objective lens (101), wherein assuming that the total focal distance of the collimating lens is f and the focal distance of the diverging lens is fn, the collimating lens satisfies the relationship -1.5 > f/fn. The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which are not standardized yet, but need a blue light source near 405nm and an objective lens having a numerical aperture of 0.6 or more.
摘要翻译： 提供能够有效地减小色差的光学拾取器。 在光学拾取器中，包括具有发散光焦度的发散透镜（103b）和具有聚焦光焦度的聚焦透镜（103a）的准直透镜（103）被布置在光源（104）和物镜（101）之间的光路上 ），其中假设准直透镜的总焦距是f并且发散透镜的焦距是fn，则准直透镜满足关系-1.5> f / fn。 该光学头兼容现有的数字多功能盘（DVD）和高清晰度（HD）-DVD，它们尚未标准化，但需要405nm附近的蓝光源和数值孔径为0.6的物镜或 更多。
-
公开(公告)号：EP1096483B1
公开(公告)日：2006-03-15
申请号：EP00309141.0
申请日：2000-10-17
CPC分类号： G11B7/1376 , G11B7/13922
-
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
发明人： Suh, Hea-Jung , Chung, Chong-Sam , Ahn, Young-Man
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）。
-
-
-
-
搜索结果
5 条记录 (耗时 0.01 秒)
