公开(公告)号：US07064900B2

公开(公告)日：2006-06-20

申请号：US10492657

申请日：2002-11-19

申请人： Norio Fukasawa ,  Junichi Suzuki ,  Kiyoshi Toyota ,  Tetsu Tanaka ,  Takeshi Kubo ,  Masahiro Saito ,  Satoru Ishii

发明人： Norio Fukasawa ,  Junichi Suzuki ,  Kiyoshi Toyota ,  Tetsu Tanaka ,  Takeshi Kubo ,  Masahiro Saito ,  Satoru Ishii

IPC分类号： G02B27/10 ,  G11B7/00 ,  G11B7/135

CPC分类号： G11B7/0908 ,  G11B7/00 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/0916 ,  G11B7/1356 ,  G11B7/1381

摘要： An optical pickup device is provided which includes a first diffraction grating (45) that splits a light beam emitted from a light-emitting/-detecting element (31) into a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts return light from an optical disk (2) for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects the deviation of the light path by diffracting the positive first-order light beam diffracted by the second diffraction grating (46). The light-emitting/-detecting element (31) provides a focusing error signal FE by detecting the negative first-order light beam, and a tracking error signal by detecting return portions of the positive and negative first-order light beams from the first diffraction grating (45).

摘要翻译： 提供了一种光学拾取装置，其包括将从发光/检测元件（31）发射的光束分成零级光束和正和负一级光束的第一衍射光栅（45） 第二衍射光栅（46），衍射来自光盘（2）的返回光，用于沿着与出射光分离的光路行进;以及第三衍射光栅（47），其通过衍射来校正光路的偏差 由第二衍射光栅（46）衍射的正一级光束。 发光/检测元件（31）通过检测负一阶光束提供聚焦误差信号FE，并且通过检测来自第一衍射的正和负一级光束的返回部分来提供跟踪误差信号 光栅（45）。

公开(公告)号：US20050025002A1

公开(公告)日：2005-02-03

申请号：US10849158

申请日：2004-05-20

申请人： Masahiro Saito ,  Norio Fukasawa ,  Kiyoshi Toyota ,  Junichi Suzuki ,  Minoru Kubo ,  Souichi Murakami

发明人： Masahiro Saito ,  Norio Fukasawa ,  Kiyoshi Toyota ,  Junichi Suzuki ,  Minoru Kubo ,  Souichi Murakami

IPC分类号： G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B7/22 ,  G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1359 ,  G11B7/1395 ,  G11B7/22

摘要： Disclosed is an optical head in which position adjustment of a photodetector light receiving surface or component parts may be simplified, production costs may be reduced and operational reliability may be improved. The optical head includes a light source 22, radiating light of a preset wavelength, an objective lens 27 for condensing the outgoing light from the light source 22 on an optical disc 2 and for condensing the return light from the optical disc 2, a beam splitter 25 for branching the optical path of the return light reflected by the optical disc 2, and for collimating the branched return light so as to be parallel to the outgoing light from the light source 22, a composite optical component including a splitting prism 30 arranged on a site of incidence of the branched return light for spatially splitting the return light, and a light receiving unit for receiving plural return light beams spatially split by the splitting prism 30 for producing focusing error signals.

摘要翻译： 公开了一种可以简化光电检测器光接收表面或部件的位置调整的光学头，可以降低生产成本并且可以提高操作可靠性。 光头包括一个照射预定波长的光源22，用于将来自光源22的输出光聚焦在光盘2上并用于聚光来自光盘2的返回光的物镜27，一个分束器 25，用于分支由光盘2反射的返回光的光路，并且用于使分支的返回光准直以与来自光源22的出射光平行;复合光学部件，包括分离棱镜30，其布置在 用于空间分离返回光的分支返回光的入射部位，以及用于接收由分割棱镜30空间分裂的多个返回光束的光接收单元，用于产生聚焦误差信号。