利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

305 条记录 (耗时 0.04 秒)

    Optical transmission and receiving module and optical communication system using the same
    2.
    发明授权
    Optical transmission and receiving module and optical communication system using the same 失效
    光接收模块和光通信系统使用相同

    公开(公告)号：US5555334A

    公开(公告)日：1996-09-10

    申请号：US319940

    申请日：1994-10-07

    申请人： Kunikazu Ohnishi ,  Masayuki Inoue ,  Yoshio Suzuki ,  Yukio Fukui

    发明人： Kunikazu Ohnishi ,  Masayuki Inoue ,  Yoshio Suzuki ,  Yukio Fukui

    IPC分类号： G02B6/28 ,  G02B6/42 ,  H04B10/40 ,  G02B6/36

    CPC分类号： H04B10/40 ,  G02B6/4246 ,  G02B6/2804 ,  G02B6/4234

    摘要： A bidirectional optical transmission and receiving module of a simplified structure and an optical communication system using the same. The optical transmission and receiving module includes a light emitting device and a light receiving device disposed with in a same package having an opening covered with a cover glass sheet, and a holographic diffraction grating provided on a top or lower surface of the glass sheet. In transmitting operation, a light beam emitted from the light emitting device passes through the diffraction grating to be concentrated onto an end face of an optical fiber by a lens. In receiving operation, a received light beam emanated from the end face of the optical fiber reaches the diffraction grating via the lens to be thereby diffracted. A plus-sign primary diffracted light beam resulting from the diffraction is concentrated onto a light detecting surface of the light receiving device. Signal as transmitted through the optical fiber in the form of signal light can thus be received.

    摘要翻译： 一种简化结构的双向光传输和接收模块以及使用其的光通信系统。 光传输和接收模块包括发光器件和光接收器件，其设置在具有覆盖玻璃片的开口的相同封装中，以及设置在玻璃板的顶表面或下表面上的全息衍射光栅。 在发射操作中，从发光器件发射的光束通过衍射光栅，通过透镜被集中在光纤的端面上。 在接收操作中，从光纤的端面发出的接收光束经由透镜到达衍射光栅，从而衍射。 由衍射产生的正符号主衍射光束集中在光接收装置的光检测表面上。 因此可以接收以信号光的形式透过光纤的信号。

    Tracking method for optical disk apparatus using diffraction light
    3.
    发明授权
    Tracking method for optical disk apparatus using diffraction light 失效
    使用衍射光的光盘装置的跟踪方法

    公开(公告)号：US5930220A

    公开(公告)日：1999-07-27

    申请号：US770075

    申请日：1996-12-19

    申请人： Takeshi Shimano ,  Akira Arimoto ,  Takeshi Nakao ,  Masayuki Inoue ,  Kunikazu Ohnishi ,  Yoshio Suzuki

    发明人： Takeshi Shimano ,  Akira Arimoto ,  Takeshi Nakao ,  Masayuki Inoue ,  Kunikazu Ohnishi ,  Yoshio Suzuki

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

    CPC分类号： G11B7/1353 ,  G11B7/094 ,  G11B7/131 ,  G11B2007/0006 ,  G11B7/0901 ,  G11B7/0909

    摘要： In an optical head, light from a semiconductor laser is directed through a condensing optical system with a condensing lens onto an optical information recording medium through a transparent substrate in the form of a light spot. A unit for producing a light spot position control signal and a unit able to move the light spot, which supports the objective lens for movement, position the light spot on an information track. Light reflected from the optical information recording medium is directed through a polarized light branching element to a photo detector. Also mounted for movement with the objective lens are a polarization conversion element, arranged between the optical information recording medium and the polarized light branching element in order to change the polarization state of light incident to the optical information recording medium and reflected therefrom and a polarization diffraction grating, the diffraction efficiency of which changes depending on the change in the polarization state of the incident light and the reflected light caused by the polarization conversion element. The light spot control signal is detected from both reflected light diffracted through the polarization diffraction grating and non-diffracted reflected light contained in the light which passes through the polarized light branching element.

    摘要翻译： 在光头中，来自半导体激光器的光通过具有聚光透镜的聚光系统通过光点形式的透明基板引导到光信息记录介质上。 用于产生光点位置控制信号的单元和能够移动支持物镜移动的光点的单元将光斑定位在信息轨道上。 从光信息记录介质反射的光通过偏振光分支元件被引导到光检测器。 为了使入射到光信息记录介质的光的偏振状态改变并反射，偏振转换元件也安装在光学信息记录介质和偏振光分支元件之间，并且偏振衍射元件 光栅，其衍射效率根据入射光的偏振态和由偏振转换元件引起的反射光的变化而变化。 从通过偏振衍射光栅衍射的反射光和通过偏振光分支元件的光中包含的非衍射反射光检测光点控制信号。

    Optical disk drive
    4.
    发明授权
    Optical disk drive 失效
    光盘驱动器

    公开(公告)号：US5751680A

    公开(公告)日：1998-05-12

    申请号：US762436

    申请日：1996-12-09

    申请人： Toshiaki Ishibashi ,  Kunikazu Ohnishi ,  Masayuki Inoue ,  Yoshio Suzuki

    发明人： Toshiaki Ishibashi ,  Kunikazu Ohnishi ,  Masayuki Inoue ,  Yoshio Suzuki

    IPC分类号： G11B7/09 ,  G11B7/095 ,  G11B7/125 ,  G11B7/135 ,  H04B1/20

    CPC分类号： G11B7/0956

    摘要： Concerning a tilt detecting optical pickup in an optical disk playback device, a highly precise tilt error signal can be obtained by a simple structure. As a structure for achieving this, there are provided a diffraction grating, on which a grating groove pattern has been engraved, capable of adding coma aberration components to + and - primary diffracted light on an optical path between a laser diode, which becomes a playback light source, and an optical disk, and a light-receiving element capable of receiving the diffracted light. The output from a signal processing circuit capable of calculating a difference between each light receiving strength becomes a tilt error signal. By deforming the aforesaid grating groove pattern, the layout of the coma aberration components can be changed. Also, a tilt error signal can be obtained from a difference in bit error numbers in playback signals from diffracted light having coma aberration. Addition of coma aberration components to the diffracted light makes it possible to easily improve the sensitivity of a tilt error signal to the tilt angle.

    摘要翻译： 关于光盘重放装置中的倾斜检测光学拾取器，可以通过简单的结构获得高精度的倾斜误差信号。 作为实现这一点的结构，提供了一种衍射光栅，其上刻有格栅槽图案，能够在成为回放的激光二极管之间的光路上将偏光成分加到+和 - 次衍射光上 光源和光盘，以及能够接收衍射光的光接收元件。 来自能够计算每个光接收强度之差的信号处理电路的输出成为倾斜误差信号。 通过使上述格栅凹槽图案变形，可以改变彗形像差分量的布局。 此外，可以从具有彗形像差的衍射光的重放信号中的位错误数的差异获得倾斜误差信号。 向衍射光添加彗形像差成分可以容易地提高倾斜误差信号对倾斜角的灵敏度。

    Tracking control apparatus for generating sawtooth tracking control signal from sinusoidal tracking error signal
    5.
    发明授权
    Tracking control apparatus for generating sawtooth tracking control signal from sinusoidal tracking error signal 失效
    用于从正弦跟踪误差信号产生锯齿跟踪控制信号的跟踪控制装置

    公开(公告)号：US5327407A

    公开(公告)日：1994-07-05

    申请号：US832406

    申请日：1992-02-07

    申请人： Motoyuki Suzuki ,  Yoshio Suzuki ,  Yukio Fukui

    发明人： Motoyuki Suzuki ,  Yoshio Suzuki ,  Yukio Fukui

    IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B21/10 ,  G11B7/095

    CPC分类号： G11B7/0901

    摘要： A tracking control apparatus includes an A/D converter, an edge detection circuit, a latch circuit and a ROM to change a tracking error signal having a sinusoidal characteristic representing a relative position of a light beam and a track on a disk to have a sawtooth characteristic representing the relative position. Stable tracking control free from off-tracking due to a disturbance is attained even when amplitudes of the tracking error signal and a tracking sum signal are not equal.

    摘要翻译： 跟踪控制装置包括A / D转换器，边缘检测电路，锁存电路和ROM，以改变跟踪误差信号，该跟踪误差信号具有表示光束的相对位置和磁盘上的轨道的正弦特性以具有锯齿波 代表相对位置的特征。 即使跟踪误差信号和跟踪和信号的幅度不相等，也可以获得由于干扰而不受偏移的稳定的跟踪控制。

    Method and apparatus for detecting position of alternated land and groove of information recording medium
    6.
    发明授权
    Method and apparatus for detecting position of alternated land and groove of information recording medium 失效
    用于检测信息记录介质的交替焊盘和凹槽位置的方法和装置

    公开(公告)号：US6091678A

    公开(公告)日：2000-07-18

    申请号：US2830

    申请日：1998-01-05

    申请人： Tetsuya Fushimi ,  Toru Kawashima ,  Hisataka Sugiyama ,  Hiroyuki Minamura ,  Yoshio Suzuki ,  Hisamitsu Tanaka

    发明人： Tetsuya Fushimi ,  Toru Kawashima ,  Hisataka Sugiyama ,  Hiroyuki Minamura ,  Yoshio Suzuki ,  Hisamitsu Tanaka

    IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/00

    CPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/00745 ,  G11B7/0901

    摘要： For a disk of a land/groove scheme with land tracks and grooves appearing alternately, in order to enable stable and reliable reproduction of information as recorded on a disk by stably and reliably detecting a specific position at which a land track and groove change therebetween, a technique is employed for detecting the position whereat one land track is changed to a groove, or vice versa, by utilizing an HPP signal rather than an RF signal in cases where an optical head 103 attempts to reproduce certain information at the pit formation position of a disk 101. In addition, detect the polarity--positive or negative--of a pit signal appearing in the HPP signal, and then detect the position whereat the land track and groove change therebetween based on the position at which the order or sequence thereof changes, thereby permitting effectuation of optical head's tracking control and focus control by a method suitable for its respective parts.

    摘要翻译： 对于具有交替出现的轨迹和凹槽的平台/凹槽方案的盘，为了通过稳定可靠地检测在其间的凹槽轨道和槽的变化的特定位置来使得能够稳定可靠地再现记录在盘上的信息， 在使用HPP信号而不是RF信号的情况下，采用一种技术来检测一条脊轨道改变为凹槽的位置，反之亦然。在光头103尝试在凹坑形成位置再现某些信息的情况下， 另外，检测出现在HPP信号中的凹坑信号的极性正或负，然后根据其顺序或顺序改变的位置来检测纹间和凹槽之间的位置。 从而可以通过适用于其各自部件的方法来实现光学头的跟踪控制和聚焦控制。