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8 条记录 (耗时 0.021 秒)

    Optical wavelength stabilizing system
    1.
    发明授权
    Optical wavelength stabilizing system 失效
    光波长稳定系统

    公开(公告)号：US5781572A

    公开(公告)日：1998-07-14

    申请号：US643491

    申请日：1996-05-06

    申请人： Yoko Tahara ,  Yoshinori Ohkuma ,  Masaru Onishi ,  Toshiyuki Masuko

    发明人： Yoko Tahara ,  Yoshinori Ohkuma ,  Masaru Onishi ,  Toshiyuki Masuko

    IPC分类号： H01S5/068 ,  H01S5/024 ,  H01S5/06 ,  H01S5/0687 ,  H01S3/04

    CPC分类号： H01S5/0687 ,  H01S5/02415 ,  H01S5/0612

    摘要： An optical wavelength stabilizing system including a laser diode for emitting signal light, a Peltier element for controlling a temperature of the laser diode, and a drive circuit for driving the Peltier element. The signal light is branched into two components by an optical coupler. In an optical path of one of the two components obtained by the optical coupler, there is inserted an optical filter having a portion whose transmittance continuously changes according to wavelength. The signal light component passed through the portion of the optical filter is detected by a photodetector. An output current from the photodetector is converted into a voltage, which is then input into a comparator. The comparator compares the voltage output from the photodetector and a reference voltage to input a voltage difference therebetween into the drive circuit.

    摘要翻译： 一种光波长稳定系统，包括用于发射信号光的激光二极管，用于控制激光二极管的温度的珀尔帖元件和用于驱动珀耳帖元件的驱动电路。 信号光通过光耦合器分支成两个分量。 在由光耦合器获得的两个部件中的一个部件的光路中插入具有根据波长的透射率连续变化的部分的滤光器。 通过光滤波器的部分的信号光分量由光电检测器检测。 来自光电检测器的输出电流被转换成电压，然后将其输入到比较器中。 比较器将来自光电检测器的电压输出与参考电压进行比较，以将它们之间的电压差输入驱动电路。

    Slice amplifier using FET's
    2.
    发明授权
    Slice amplifier using FET's 失效
    使用FET的片式放大器

    公开(公告)号：US4816699A

    公开(公告)日：1989-03-28

    申请号：US094680

    申请日：1987-10-09

    申请人： Masakazu Mori ,  Tetsuo Wada ,  Yuji Miyaki ,  Kazuo Yamane ,  Kazuhiro Suzuki ,  Yoshinori Ohkuma

    发明人： Masakazu Mori ,  Tetsuo Wada ,  Yuji Miyaki ,  Kazuo Yamane ,  Kazuhiro Suzuki ,  Yoshinori Ohkuma

    IPC分类号： H03G11/00 ,  H03K5/08 ,  H03K19/003

    CPC分类号： H03K5/08 ,  H03G11/00 ,  H03K19/00384

    摘要： A slice amplifier using field effect transistors (FET's) is provided which is suitable for achieving a correct discrimination of logics "0" and "1" of an input signal (S.sub.in) at very high speed by reshaping the input signal (S.sub.in) into rectangular shaped pulses (S.sub.out). The top and bottom of each pulse are determined to predetermined constant levels by using a first FET (T.sub.1) and a second FET (T.sub.2) with the aid of a first monitor and control unit (41) and second monitor and control unit (42). The first and second monitor and control units (41, 42) monitor the drain voltages of the first and second FET's (T.sub.1, T.sub.2) and control the gate-source voltages thereof, respectively, so as to realize the predetermined constant levels.

    摘要翻译： PCT No.PCT / JP86 / 00639 Sec。 371日期1987年10月9日第 102（e）1987年10月9日PCT PCT 1986年12月17日PCT公布。 第WO87 / 04027号公报 日期1987年7月2日。提供一种使用场效应晶体管（FET）的片式放大器，其适用于通过重新形成对正确鉴别输入信号（Sin）的逻辑“0”和“1” 输入信号（Sin）变成矩形脉冲（Sout）。 借助于第一监视和控制单元（41）和第二监视和控制单元（42），通过使用第一FET（T1）和第二FET（T2）将每个脉冲的顶部和底部确定为预定的恒定电平， 。 第一和第二监视和控制单元（41,42）分别监视第一和第二FET（T1，T2）的漏极电压并分别控制其栅极 - 源极电压，以便实现预定的恒定电平。

    Apparatus, method and program storage medium for image interpretation
    5.
    发明申请
    Apparatus, method and program storage medium for image interpretation 审中-公开
    用于图像解释的装置，方法和程序存储介质

    公开(公告)号：US20080037904A1

    公开(公告)日：2008-02-14

    申请号：US11826467

    申请日：2007-07-16

    申请人： Michiyo Hiramoto ,  Yoshinori Ohkuma ,  Shinichi Murata

    发明人： Michiyo Hiramoto ,  Yoshinori Ohkuma ,  Shinichi Murata

    IPC分类号： G06K9/60 ,  G06K9/66

    CPC分类号： G06K9/2063 ,  G06K9/00469

    摘要： An image interpretation apparatus including a registration section, an image search section, and an image interpretation section is provided. The registration section registers an object image in an object database. The image search section searches a type, an attribute, and an arrangement, or a combination of the object images included in an input image. The image interpretation section interprets semantics of the input image based on the arrangement, the combination, or the like. Due to this configuration, plural pieces of semantics can be given to a single image, and a complex subsequent-stage process can be performed according to an image interpretation result.

    摘要翻译： 提供了一种包括注册部分，图像搜索部分和图像解释部分的图像解释装置。 注册部分将对象图像注册到对象数据库中。 图像搜索部分搜索包括在输入图像中的对象图像的类型，属性和布置，或者组合。 图像解释部分基于排列，组合等来解释输入图像的语义。 由于该配置，可以向单个图像赋予多个语义，并且可以根据图像解释结果执行复杂的后续处理。

    Optical modulator, bias control circuit therefor, and optical transmitter including the optical modulator
    6.
    发明授权
    Optical modulator, bias control circuit therefor, and optical transmitter including the optical modulator 失效
    光调制器，偏置控制电路和包括光调制器的光发射机

    公开(公告)号：US06334004B1

    公开(公告)日：2001-12-25

    申请号：US09460390

    申请日：1999-12-13

    申请人： Yoshinori Ohkuma ,  Motoyoshi Sekiya

    发明人： Yoshinori Ohkuma ,  Motoyoshi Sekiya

    IPC分类号： G02F1035

    CPC分类号： G02F1/0123 ,  G02F1/225 ,  G02F2203/21

    摘要： Disclosed herein is an optical modulator including an optical waveguide structure for converting an input beam into first and second output beams, an electrode for applying an electric field to the optical waveguide structure, so as to switch between a first mode where the input beam is converted into the first output beam and a second mode where the input beam is converted into the second output beam, first and second photodetectors for detecting the powers of the first and second output beams, respectively, and a bias circuit for applying a bias to the electrode so that the ratio in output level between the first and second photodetectors becomes constant. With this configuration, an operation point can be stabilized without the need for superimposition of a low-frequency signal, thereby suppressing intersymbol interference.

    摘要翻译： 本发明公开了一种光调制器，包括用于将输入光束转换为第一和第二输出光束的光波导结构，用于向光波导结构施加电场的电极，以便在输入光束被转换的第一模式之间切换 进入第一输出光束和第二模式，其中输入光束被转换成第二输出光束，分别用于检测第一和第二输出光束的光焦度的第一和第二光电检测器和用于向电极施加偏压的偏置电路 使得第一和第二光电检测器之间的输出电平的比率变得恒定。 利用这种配置，可以稳定操作点而不需要叠加低频信号，从而抑制码间干扰。

    Control circuit for supplying a driving current to a laser diode
    7.
    发明授权
    Control circuit for supplying a driving current to a laser diode 失效
    用于向激光二极管提供驱动电流的控制电路

    公开(公告)号：US5732096A

    公开(公告)日：1998-03-24

    申请号：US655813

    申请日：1996-05-31

    申请人： Kazuhiro Suzuki ,  Hiroshi Kuzukami ,  Yuji Miyaki ,  Akihiko Yasuda ,  Yoshinori Ohkuma

    发明人： Kazuhiro Suzuki ,  Hiroshi Kuzukami ,  Yuji Miyaki ,  Akihiko Yasuda ,  Yoshinori Ohkuma

    IPC分类号： H01S5/068 ,  H01S5/0683 ,  H01S3/00

    CPC分类号： H01S5/06832

    摘要： The control circuit for supplying a driving current to a laser diode makes it possible to keep the laser driving current variable in a wide range. The control circuit includes a laser diode, a photo diode for receiving a part of an optical output emitted from the laser diode and outputting an electrical signal corresponding to a level of the optical output, a first current supplying circuit for supplying a bias current to the laser diode, a first monitor circuit for monitoring a size of a signal driving current supplied by the first current supplying circuit, a second monitor circuit for monitoring a size of the bias current supplied by the second current supplying circuit, a first feed-back loop for controlling the signal driving current supplied from the first current supplying circuit by the output of the first monitor circuit, as a reference of the electric signal outputted from the photo diode corresponding to the level of the optical output emitted from the laser diode, a second feed-back loop for controlling the bias current supplied from the second current supplying circuit by the output of the second monitor circuit, as said reference of the signal outputted from the photo diode corresponding to the level of the optical output emitted form the laser diode; and an adder circuit for adding an offset current of the signal driving current supplied from the first current supplying circuit on the outside of the first feed-back loop.

    摘要翻译： 用于向激光二极管提供驱动电流的控制电路使得可以将激光驱动电流保持在宽范围内。 所述控制电路包括激光二极管，用于接收从所述激光二极管发射的光输出的一部分并输出与所述光输出的电平对应的电信号的光电二极管;第一电流供应电路， 激光二极管，用于监测由第一电流供应电路提供的信号驱动电流的大小的第一监视器电路，用于监视由第二电流供应电路提供的偏置电流的大小的第二监视电路，第一反馈回路 用于通过第一监视电路的输出来控制从第一电流供应电路提供的信号驱动电流作为从与激光二极管发射的光输出的电平相对应的从光电二极管输出的电信号的参考，第二 反馈回路，用于通过第二监视电路的输出来控制从第二电流供应电路提供的偏置电流 所述参考从光电二极管输出的信号对应于从激光二极管发射的光输出的电平; 以及加法电路，用于将从第一电流供应电路提供的信号驱动电流的偏移电流加到第一反馈回路的外部。