公开(公告)号：US5835472A

公开(公告)日：1998-11-10

申请号：US62321

申请日：1993-05-17

申请人： Noriyoshi Horie ,  Tatsuo Ohgaki ,  Hayami Hosokawa ,  Masami Tada ,  Tsukasa Yamashita

发明人： Noriyoshi Horie ,  Tatsuo Ohgaki ,  Hayami Hosokawa ,  Masami Tada ,  Tsukasa Yamashita

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

CPC分类号： G11B7/1356 ,  G11B7/124 ,  G11B7/1353 ,  G11B11/10543

摘要： An integrated optical pickup device for a magnetooptical recording medium (e.g. a magnetooptical recording disk) and/or an optical recording medium (e.g. an optical recording disk) in which a plurality of focusing grating couplers are formed on an optical waveguide layer manufactured on a substrate. A light reflected from a magnetooptical disk or an optical disk is guided by the focusing grating couplers into the waveguide layer to be separated and to be converged therethtough. The converged lights are detected so as to produce a tracking error signal, a focusing error signal, and an information readout signal. The plural focusing grating couplers are fabricated at an identical location on the waveguide in a superimposed fashion. This increases the utilization efficiency of reflection light per each unitary area of the focusing grating couplers and hence the signals are obtained in a stable state. Between a semiconductor laser and a collimation lens, there is formed a composite beam splitter having two reflection surfaces. Reflection lights from the magnetooptical disk are respectively reflected by these reflection surfaces and are then received by photosensors. Analyzers are disposed respectively on front sides of the photosensors. The analyzers respectively have polarization directions orthogonal to each other. Each photosensor includes three-partition photodiode. The beam sizing method and the push-pull detection methods are used for detecting the focusing and tracking errors. The optical pickup device can also used to read data from an optical disk. A prism is disposed between a semiconductor laser and a collimation lens. The prism has two reflection surfaces. Reflection lights from a magnetooptical disk are respectively reflected by these reflection surfaces to be received by photosensors. On front sides of the photosensors, there are respectively arranged analyzers respectively having polarization directions orthogonal to each other.

公开(公告)号：US5138687A

公开(公告)日：1992-08-11

申请号：US588332

申请日：1990-09-26

申请人： Noriyoshi Horie ,  Hayami Hosokawa ,  Masami Tada ,  Tsukasa Yamashita ,  Tatsuo Ohgaki ,  Hironobu Kiyomoto

发明人： Noriyoshi Horie ,  Hayami Hosokawa ,  Masami Tada ,  Tsukasa Yamashita ,  Tatsuo Ohgaki ,  Hironobu Kiyomoto

IPC分类号： G02B6/12 ,  G02B6/122 ,  G02B6/125 ,  G02B6/13 ,  G02B6/28

CPC分类号： G02B6/124 ,  G02B6/12002 ,  G02B6/122 ,  G02B6/1221 ,  G02B6/1245 ,  G02B6/125 ,  G02B6/13 ,  G02B6/30 ,  G02B2006/12102 ,  G02B2006/12119 ,  G02B2006/1215 ,  G02B2006/12195 ,  G02B2006/2865 ,  G02B6/12007

摘要： On a substrate (1), a core layer (2) is formed such that the core layer (2) includes a rib section (2a) fabricated to be integral therewith. The core layer (2) and the rib section (2a) are formed with a liquid material to be solidified under an energy irradiation, for example, a UV-setting resin. A clad layer (3) is disposed on the core layer (2). A buffer layer (4) is formed between the core layer (2) and the substrate (1).

摘要翻译： 在基板（1）上，形成芯层（2），使得芯层（2）包括与其一体制成的肋部（2a）。 芯层（2）和肋部（2a）由能量照射下固化的液体材料形成，例如UV固化树脂。 包覆层（3）设置在芯层（2）上。 在芯层（2）和基板（1）之间形成缓冲层（4）。

公开(公告)号：US5132843A

公开(公告)日：1992-07-21

申请号：US491095

申请日：1990-03-09

申请人： Shigeru Aoyama ,  Masami Tada ,  Hayami Hosokawa ,  Noriyoshi Horie ,  Tukasa Yamashita

发明人： Shigeru Aoyama ,  Masami Tada ,  Hayami Hosokawa ,  Noriyoshi Horie ,  Tukasa Yamashita

IPC分类号： G02B6/122 ,  G02B3/08 ,  G02B5/18 ,  G02B6/124 ,  G02B6/34 ,  G11B7/12 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G02B5/1876 ,  G02B6/124 ,  G02B6/1245 ,  G02B6/34 ,  G11B7/124

摘要： A grating lens is disclosed in which diffraction efficiency varies in the focusing direction of light on a surface of the lens. Also disclosed is a focusing grating coupler in which the diffraction efficiency of a grating formed on an optical waveguide, which is formed on a substrate, varies in the focusing direction of light.

摘要翻译： 公开了一种光栅透镜，其中衍射效率在透镜的表面上的光的聚焦方向上变化。 还公开了一种聚焦光栅耦合器，其中形成在形成在基板上的光波导上的光栅的衍射效率在光的聚焦方向上变化。