公开(公告)号：US5854702A

公开(公告)日：1998-12-29

申请号：US694343

申请日：1996-08-08

Applicant: Tomohisa Ishikawa ,  Katsuhiko Hakomori ,  Tatsuya Nishimura

Inventor： Tomohisa Ishikawa ,  Katsuhiko Hakomori ,  Tatsuya Nishimura

IPC: H04B10/40 ,  H01S5/068 ,  H04B10/079 ,  H04B10/272 ,  H04B10/50 ,  H04B10/564 ,  H04B10/60 ,  H04B10/67 ,  H04B10/69 ,  H04B10/00

CPC classification number: H04B10/40 ,  H04B10/0795

Abstract: An optical module includes a photodiode disposed in front of a laser diode with an offset from an optical axis of the laser diode, for monitoring the power of an optical beam emitted from the laser diode in a forward direction. The optical module further achieves switching between a transmission mode and a reception mode in response to a drive current supplied to the laser diode.

Abstract translation: 光学模块包括设置在激光二极管的前面，具有偏离激光二极管的光轴的光电二极管，用于监视从激光二极管向前发射的光束的功率。 光模块还响应于提供给激光二极管的驱动电流而实现在传输模式和接收模式之间的切换。

公开(公告)号：US06269204B1

公开(公告)日：2001-07-31

申请号：US09405216

申请日：1999-09-27

Applicant: Tomohisa Ishikawa

Inventor： Tomohisa Ishikawa

IPC: G02B628

CPC classification number: H04B10/27 ,  G02B6/29332 ,  G02B6/29385 ,  H04B10/071 ,  H04B10/272 ,  H04J14/0226 ,  H04J14/0258 ,  H04J14/0276 ,  H04J14/0282

Abstract: Disclosed herein is a system including a first optical fiber transmission line, a plurality of second optical fiber transmission lines, a branching section for optically connecting these first and second optical fiber transmission lines, a monitor device optically connected to the first optical fiber transmission line, and a plurality of reflecting sections respectively provided in the vicinity of open ends of the second optical fiber transmission lines. The monitor device outputs monitor light through the first optical fiber transmission line and the branching section to each of the second optical fiber transmission lines. The reflecting sections reflect the monitor light to thereby generate identification optical signals having different patterns for respectively identifying the second optical fiber transmission lines. With this configuration, the monitor device can detect an abnormality in each of the second optical fiber transmission lines according to the presence of absence of the corresponding identification optical signal.

Abstract translation: 本发明公开了一种系统，包括第一光纤传输线，多条第二光纤传输线，用于光纤连接这些第一和第二光纤传输线的分支部分，与第一光纤传输线光学连接的监视器， 以及分别设置在第二光纤传输线的开口端附近的多个反射部。 监视器装置通过第一光纤传输线和分支部将监视光输出到每个第二光纤传输线。 反射部分反射监视光，从而产生具有不同图案的识别光信号，以分别识别第二光纤传输线。 利用这种结构，监视装置可以根据是否存在对应的识别光信号来检测每个第二光纤传输线中的异常。

公开(公告)号：US07642495B2

公开(公告)日：2010-01-05

申请号：US12109972

申请日：2008-04-25

Applicant: Tomohisa Ishikawa

Inventor： Tomohisa Ishikawa

IPC: G01J1/32 ,  G01J1/44 ,  F21V1/00 ,  H01L27/15

CPC classification number: G01J1/32

Abstract: A light source error detection system and method including monitoring a plurality of characteristics of a light source and controlling the light source based on a plurality of monitored results. The system and method control the light source differently for a first case when only one of the monitored characteristics is abnormal than a second case when more than two of the monitored characteristics are abnormal. In controlling the light source, an output power of the light source is decreased with different time constant for the first case and the second case.

Abstract translation: 一种光源误差检测系统和方法，包括监视光源的多个特性并基于多个监视结果控制光源。 当仅有一个监测特性异常时，系统和方法对于第一种情况不同地控制光源，而当超过两个监测特性是异常时，系统和方法不同地控制光源。 在控制光源时，对于第一种情况和第二种情况，光源的输出功率以不同的时间常数减小。

公开(公告)号：US5936753A

公开(公告)日：1999-08-10

申请号：US874667

申请日：1997-06-13

Applicant: Tomohisa Ishikawa

Inventor： Tomohisa Ishikawa

IPC: H04B10/07 ,  H04B10/077 ,  H04B10/079 ,  H04B10/27 ,  H04B10/272 ,  H04B10/294 ,  H04B10/297 ,  H04B10/54 ,  H04B10/564 ,  H04J14/00 ,  H04J14/02 ,  H04Q11/00 ,  H04B10/08

CPC classification number: H04B10/272 ,  H04B10/0793 ,  H04B10/07955 ,  H04B10/0799 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04B2210/08 ,  H04J14/0298 ,  H04Q11/0062 ,  H04Q2011/0039

Abstract: An optical network system for bidirectional transmission between a main system (e.g., central station) and a plurality of auxiliary systems (e.g., subscriber's stations). The main system outputs a main optical signal to a main fiber. The auxiliary systems output auxiliary optical signals to a plurality of auxiliary fibers, respectively. The main fiber and the auxiliary fibers are network-connected by a connecting unit. The main system has a detector for detecting the auxiliary optical signals and a control signal generator for generating a control signal including data for designating a specific auxiliary system whose auxiliary optical signal is not detected. The main optical signal in the auxiliary fiber corresponding to the specific auxiliary system is attenuated according to the control signal. Accordingly, laser hazard in each auxiliary system is prevented.

Abstract translation: 一种用于在主系统（例如，中心站）和多个辅助系统（例如，用户站）之间进行双向传输的光网络系统。 主系统将主光信号输出到主光纤。 辅助系统分别将辅助光信号输出到多个辅助光纤。 主纤维和辅助纤维通过连接单元进行网络连接。 主系统具有用于检测辅助光信号的检测器和用于产生控制信号的控制信号发生器，该控制信号包括用于指定不检测辅助光信号的特定辅助系统的数据。 对应于特定辅助系统的辅助光纤中的主光信号根据控制信号衰减。 因此，防止了每个辅助系统中的激光危险。

公开(公告)号：US20110052207A1

公开(公告)日：2011-03-03

申请号：US12805690

申请日：2010-08-13

Applicant: Tomohisa Ishikawa ,  Hiroshi Kuzukami

Inventor： Tomohisa Ishikawa ,  Hiroshi Kuzukami

IPC: H04B10/04

CPC classification number: H01S5/0687 ,  H01S5/141 ,  H04B10/572

Abstract: An optical transmission device in which: a first cyclic filter with a fixed transmission wavelength characteristic and a second cyclic filter with a variable transmission wavelength characteristic are combined, and the transmission wavelength characteristic of the second cyclic filter is changed according to a target wavelength, to thereby control the relative phase relationship of the transmission wavelength characteristics of the first and second cyclic filters. Moreover a light source is controlled according to a monitored value of the transmittance of the second cyclic filter with respect to the control target light, to thereby match the wavelength of the control target light with the target wavelength. Consequently, it is possible, with a simple configuration using a combination of two cyclic filters, to variably control wavelength at arbitrary wavelength intervals at a high level of precision.

Abstract translation: 一种光传输装置，其特征在于：组合具有固定透射波长特性的第一循环滤波器和具有可变透射波长特性的第二循环滤波器，并且根据目标波长将第二循环滤波器的透射波长特性改变为 从而控制第一和第二循环滤波器的透射波长特性的相对相位关系。 此外，根据第二循环滤波器相对于控制目标光的透射率的监测值来控制光源，从而将控制目标光的波长与目标波长相匹配。 因此，通过使用两个循环滤波器的组合的简单配置，可以以高精度可变地控制任意波长间隔的波长。

公开(公告)号：US20080265132A1

公开(公告)日：2008-10-30

申请号：US12109972

申请日：2008-04-25

Applicant: Tomohisa Ishikawa

Inventor： Tomohisa Ishikawa

IPC: G01J1/44

CPC classification number: G01J1/32

Abstract: A light source error detection system and method including monitoring a plurality of characteristics of a light source and controlling the light source based on a plurality of monitored results. The system and method control the light source differently for a first case when only one of the monitored characteristics is abnormal than a second case when more than two of the monitored characteristics are abnormal. In controlling the light source, an output power of the light source is decreased with different time constant for the first case and the second case.

Abstract translation: 一种光源误差检测系统和方法，包括监视光源的多个特性并基于多个监视结果控制光源。 当仅有一个监测特性异常时，系统和方法对于第一种情况不同地控制光源，而当超过两个监测特性是异常时，系统和方法不同地控制光源。 在控制光源时，对于第一种情况和第二种情况，光源的输出功率以不同的时间常数减小。

公开(公告)号：US4972755A

公开(公告)日：1990-11-27

申请号：US361826

申请日：1989-06-01

Applicant: Yoichiro Tajima ,  Hideo Yamaya ,  Tomohisa Ishikawa

Inventor： Yoichiro Tajima ,  Hideo Yamaya ,  Tomohisa Ishikawa

IPC: G10H1/34 ,  G10H1/42

CPC classification number: G10H1/34 ,  G10H1/42 ,  Y10S84/12

Abstract: A plurality of pad operating means for manual operation are provided on a keyboard panel of an electronic keyboard musical instrument. When an operator operates the pad operating means using the keyboard during melody play, an operation signal is supplied to a CPU, and a rhythm sound corresponding to the operated pad is generated under control of the CPU. An automatic sound signal generator is provided for generating and outputting sound signals according to a designated rhythm, and selectively stops such sound signal generation. A sounding system is provided for sounding the signals received thereby.

公开(公告)号：US4656428A

公开(公告)日：1987-04-07

申请号：US736444

申请日：1985-05-21

Applicant: Tomohisa Ishikawa

Inventor： Tomohisa Ishikawa

IPC: H03B28/00 ,  G10H1/16 ,  G10H1/42 ,  G10H7/02 ,  G10H7/06 ,  G10H7/00 ,  G10H1/02

CPC classification number: G10H7/02 ,  G10H1/42 ,  G10H7/06 ,  G10H2230/321

Abstract: A step signal of which the period varies according to random data is derived from a step pulse generator, and is supplied to an address counter. By the output data from the address counter, an address of a waveform ROM is specified. From a waveform ROM, the waveform based on the random data is output in the form of a distorted waveform signal. Using this output signal of the distorted waveform, a cymbal sound, for example, is generated in a musical tone generator.

Abstract translation: 根据随机数据，周期变化的阶跃信号从步进脉冲发生器导出，并被提供给地址计数器。 通过来自地址计数器的输出数据，指定波形ROM的地址。 从波形ROM中，以失真的波形信号的形式输出基于随机数据的波形。 使用该畸变波形的输出信号，例如在乐音发生器中产生钹音。

公开(公告)号：US4481853A

公开(公告)日：1984-11-13

申请号：US396780

申请日：1982-07-09

Applicant: Tomohisa Ishikawa

Inventor： Tomohisa Ishikawa

IPC: G10H1/42 ,  G10F1/00

CPC classification number: G10H1/42 ,  Y10S84/12

Abstract: An electronic keyboard musical instrument is capable of inputting rhythmic patterns by setting desired rhythmic patterns in memory circuits using the keys of keyboards. The set rhythmic patterns operate a rhythm source circuit when read out from the memory circuits during performance and thereby output rhythm sounds.

Abstract translation: 电子键盘乐器能够通过使用键盘的键在存储器电路中设置所需的节奏模式来输入节奏模式。 设定的节奏模式在演奏过程中从存储器电路中读出时可操作节奏源电路，从而输出节奏声音。

公开(公告)号：US08364045B2

公开(公告)日：2013-01-29

申请号：US12805690

申请日：2010-08-13

Applicant: Tomohisa Ishikawa ,  Hiroshi Kuzukami

Inventor： Tomohisa Ishikawa ,  Hiroshi Kuzukami

IPC: H04B10/00 ,  H04B10/12

CPC classification number: H01S5/0687 ,  H01S5/141 ,  H04B10/572

Abstract: An optical transmission device in which: a first cyclic filter with a fixed transmission wavelength characteristic and a second cyclic filter with a variable transmission wavelength characteristic are combined, and the transmission wavelength characteristic of the second cyclic filter is changed according to a target wavelength, to thereby control the relative phase relationship of the transmission wavelength characteristics of the first and second cyclic filters. Moreover a light source is controlled according to a monitored value of the transmittance of the second cyclic filter with respect to the control target light, to thereby match the wavelength of the control target light with the target wavelength. Consequently, it is possible, with a simple configuration using a combination of two cyclic filters, to variably control wavelength at arbitrary wavelength intervals at a high level of precision.

Abstract translation: 一种光传输装置，其特征在于：组合具有固定透射波长特性的第一循环滤波器和具有可变透射波长特性的第二循环滤波器，并且根据目标波长将第二循环滤波器的透射波长特性改变为 从而控制第一和第二循环滤波器的透射波长特性的相对相位关系。 此外，根据第二循环滤波器相对于控制目标光的透射率的监测值来控制光源，从而将控制目标光的波长与目标波长相匹配。 因此，通过使用两个循环滤波器的组合的简单配置，可以以高精度可变地控制任意波长间隔的波长。