公开(公告)号：US5495464A

公开(公告)日：1996-02-27

申请号：US296753

申请日：1994-08-26

申请人： Kazuhiro Fujikawa ,  Nobuo Miyairi ,  Yasuhiro Miyazaki ,  Takashi Ogata ,  Masaaki Komiya

发明人： Kazuhiro Fujikawa ,  Nobuo Miyairi ,  Yasuhiro Miyazaki ,  Takashi Ogata ,  Masaaki Komiya

IPC分类号： G11B7/125 ,  G11B7/00

CPC分类号： G11B7/126

摘要： In an optical data recording/reproducing apparatus for performing write and read operations of data by irradiating laser light onto an optical data recording medium, in order to reduce noise of a semiconductor laser, an HF oscillator is provided to superpose an HF current on a drive current to be applied to the semiconductor laser. The HF oscillator is housed in a conductive shield case together with the semiconductor laser. An LC low-pass filter is also provided in a signal line connecting the components inside and outside the shield case to prevent undesired radiation of the HF current. A write drive line and a read drive line of the semiconductor laser are separated in the shield case, and the write drive line is disconnected from the HF oscillator in at least a read mode.

摘要翻译： 在用于通过将激光照射到光学数据记录介质上进行数据的写入和读取操作的光学数据记录/再现装置中，为了降低半导体激光器的噪声，提供HF振荡器以将HF电流叠加在驱动器 要施加到半导体激光器的电流。 HF振荡器与半导体激光器一起容纳在导电屏蔽壳体中。 在连接屏蔽壳体内部和外部的部件的信号线中还提供LC低通滤波器，以防止HF电流的不期望的辐射。 半导体激光器的写入驱动线和读取驱动线在屏蔽壳中分离，写入驱动线至少在读取模式下与HF振荡器断开。

公开(公告)号：US5629916A

公开(公告)日：1997-05-13

申请号：US453361

申请日：1995-05-30

申请人： Masaaki Komiya

发明人： Masaaki Komiya

IPC分类号： G11B11/10 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B11/105 ,  B11B7/09

CPC分类号： G11B7/131 ,  G11B11/10543 ,  G11B11/10576 ,  G11B7/0901 ,  G11B7/0943 ,  G11B7/1381 ,  G11B7/0908

摘要： An optical information reproducing device for reading informations recorded on the opto-magnetic recording medium is disclosed. The device comprises a first beam splitter for separating an inward path from an outward path of the light and a second beam splitter having a plane-parallel plate for separating the separated return light into two light fluxes including light flux with at least astigmatism, the first beam splitter having transmittivity and reflectance factor for the polarization component in the direction perpendicular to the linear polarization direction of the incident light being about 100%, the photodetector for receiving light flux with astigmatism separated from the second beam splitter being arranged in such a manner that the major axis of the ellipsoidal spot formed on the photodetector due to astigmatism becomes the push-pull signal direction.

摘要翻译： 公开了一种用于读取记录在光磁记录介质上的信息的光信息再现装置。 该装置包括用于将向内路径与光的向外路径分开的第一分束器和具有平面平行板的第二分束器，该平面平行板用于将分离的返回光分离成包括至少散光的包括光通量的两个光束，第一分束器 具有与入射光线性偏振方向垂直的方向的偏振分量的透射率和反射系数为约100％的光束分离器，用于接收与第二分束器分离的散光的光束的光检测器以如下方式排列： 由于散光形成在光检测器上的椭圆形点的长轴成为推挽信号方向。

公开(公告)号：US06582269B2

公开(公告)日：2003-06-24

申请号：US09905975

申请日：2001-07-17

申请人： Kenji Sakai ,  Sumio Hashimoto ,  Hisao Hosoya ,  Masaaki Komiya

发明人： Kenji Sakai ,  Sumio Hashimoto ,  Hisao Hosoya ,  Masaaki Komiya

IPC分类号： H01J900

CPC分类号： H01J5/54

摘要： A lamp apparatus comprises a lamp body, a base mounted to the lamp body, the base including a top end of base connected with a first conductor electrically and a threaded portion connected with a second conductor electrically, the top end of base and the first conductor welded through the process of mutual fusion, and a welded portion formed in a convex shape with the mixture of materials of the top end of base and the first conductor.

公开(公告)号：US5513121A

公开(公告)日：1996-04-30

申请号：US173910

申请日：1993-12-27

申请人： Ken Sugawara ,  Masaaki Komiya

发明人： Ken Sugawara ,  Masaaki Komiya

IPC分类号： G11B7/08 ,  G11B7/22 ,  G11B7/135

CPC分类号： G11B7/22 ,  G11B7/08

摘要： An optical head has a stationary optical system and a movable optical system. The stationary optical system includes a semiconductor laser located in a holding member with an opening, and a beam splitter for guiding light emitted from the light source, to the outside of the holding member through the opening. The sheet member contacts both the beam splitter and that portion of the holding member which surrounds the opening thereof, thereby sealing the opening. Further, the holding member is movably secured to the frame of the movable optical system.

摘要翻译： 光头具有固定光学系统和可移动光学系统。 固定光学系统包括位于具有开口的保持构件中的半导体激光器和用于将从光源发射的光引导通过开口的保持构件的外部的分束器。 片状部件与分束器和包围其开口的保持部件的部分接触，从而密封开口。 此外，保持构件可移动地固定到可移动光学系统的框架。

公开(公告)号：US5307335A

公开(公告)日：1994-04-26

申请号：US582384

申请日：1990-09-14

申请人： Masaaki Komiya

发明人： Masaaki Komiya

IPC分类号： B41M5/26 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B11/10543

摘要： An apparatus for optically reading information out of an opto-magnetic disk including a semiconductor laser emitting a polarized laser light beam which is made incident upon the opto-magnetic disk via beam splitter, reflection surface and objective lens. The light beam reflected by the opto-magnetic disk is made incident upon a photodetector by the objective lens and beam splitter. In order to compensate for the phase difference of P polarized and S polarized light components of the light beam reflected by the opto-magnetic disk within a wavelength over which the wavelength of the light beam might fluctuate due to the temperature variation, multi film constructions are provided in the beam splitter and reflection surface, the multi film constructions having such characteristics that the wavelength dependencies of the phase difference of the beam splitter and reflection surface can be made substantially a constant value such as zero and 90 degrees.

摘要翻译： 一种用于光学读出信息的装置，该光盘包括发射通过分光器，反射表面和物镜入射在光磁盘上的偏振激光束的半导体激光器。 由光磁盘反射的光束通过物镜和分束器入射到光电检测器上。 为了补偿在由于温度变化引起的光束的波长可能波动的波长内由光磁盘反射的光束的P偏振和S偏振光分量的相位差，多层结构是 设置在分束器和反射表面中的多膜结构具有使得分束器和反射表面的相位差的波长相关性可以基本上为零和90度的恒定值的特性。