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。

公开(公告)号：US5732060A

公开(公告)日：1998-03-24

申请号：US607448

申请日：1996-02-27

申请人： Kiyoshi Toyota ,  Kimihiro Saito ,  Noriaki Nishi ,  Hitoshi Tamada ,  Shuichi Matsumoto

发明人： Kiyoshi Toyota ,  Kimihiro Saito ,  Noriaki Nishi ,  Hitoshi Tamada ,  Shuichi Matsumoto

IPC分类号： G11B11/10 ,  G02B5/30 ,  G11B7/12 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B11/10543 ,  G11B7/123 ,  G11B7/1356

摘要： An optical pickup and an optical recording medium reproducing apparatus smaller and more reliable than conventional optical pickups and optical recording medium reproducing apparatuses. These are provided with a one-dimensional metal grid which is formed so that the ratio h/d that the pitch "d" and the thickness of metal conductors "h" constituting the wire grid is about 0.1 or more, and also a group of light receiving units which receive light beams split by the one-dimensional metal grid.

摘要翻译： 光学拾取器和光记录介质再现装置比常规光学拾取器和光学记录介质再现装置更小且更可靠。 它们设置有一维金属格栅，其形成为使得构成网格的间距“d”和金属导体“h”的厚度的比率h / d为约0.1以上，还包括一组 接收由一维金属网格分裂的光束的光接收单元。