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    • 1. 发明授权
    • Optical-fiber amplifier
    • 光纤放大器
    • US5581397A
    • 1996-12-03
    • US609893
    • 1996-03-04
    • Takanori MakiKenji Ohta
    • Takanori MakiKenji Ohta
    • H01S3/07H01S3/06H01S3/094H01S3/10H01S3/00
    • H01S3/094003H01S3/09408H01S5/06825H01S5/4012
    • Pumping light from two pumping light sources is supplied to an optical coupler which splits it into two output beams and supplies the beams to erbium-doped optical fibers in the forward and backward paths, respectively. To avoid the detrimental effect caused by interference that occurs when the wavelengths of the two pumping light sources coincide perfectly with each other, the two pumping light sources are activated alternately by clock signals that are 180.degree. out of phase with each other. Alternatively, optical shutters may be provided between the optical coupler and the respective pumping light source, and these optical shutters may be opened alternately. If one or other of the pumping light sources stops due to failure, the average level of the pumping light supplied to the optical fibers will drop. To compensate for this, it will be preferable to make provision so that when a fault is detected in one light source, pumping light is continuously supplied to the optical coupler from the other pumping light source.
    • 来自两个泵浦光源的泵浦光被提供给光耦合器,其将其分成两个输出光束并将光束分别提供给前向和后向路径中的掺铒光纤。 为了避免当两个泵浦光源的波长彼此完全一致时发生的干扰引起的有害影响,两个泵浦光源被彼此相差180度的时钟信号交替激活。 或者,光学快门可以设置在光耦合器和相应的泵浦光源之间,并且这些光学快门可以交替打开。 如果一个或另一个泵浦光源由于故障而停止,则提供给光纤的泵浦光的平均电平将下降。 为了补偿这一点,优选的是提供使得当在一个光源中检测到故障时,泵浦光从另一个泵浦光源连续地提供给光耦合器。
    • 3. 发明授权
    • Control equipment with communication apparatus
    • 带通讯设备的控制设备
    • US07849236B2
    • 2010-12-07
    • US11775357
    • 2007-07-10
    • Wataru NagauraKenji OhtaKouichi Sato
    • Wataru NagauraKenji OhtaKouichi Sato
    • G06F13/00
    • G06F13/24G06F13/102G06F13/105
    • A control equipment with a built-in communication apparatus is provided which realizes a delay required for communication without a software intervention while at the same time reducing a load of the communication processing. The control equipment with a communication apparatus includes: a communication device to communicate with a plurality of destinations; and a decision device to determine a mode requiring a reception completion interrupt and a mode not requiring the reception completion interrupt. If the decision device decides that the reception completion interrupt is not necessary, the communication device transmits data to one or more destinations and also virtually transmits data to a second destination different from the first intended destination.
    • 提供具有内置通信装置的控制设备,其实现通信所需的延迟而无需软件干预,同时减少通信处理的负担。 具有通信装置的控制设备包括:与多个目的地通信的通信设备; 以及确定需要接收完成中断的模式和不需要接收完成中断的模式的决定装置。 如果决定装置决定不需要接收完成中断,则通信装置向一个或多个目的地发送数据,并且还将数据虚拟地发送到与第一预定目的地不同的第二目的地。
    • 5. 发明授权
    • Magnetic recording medium and magnetic recording apparatus using same
    • 磁记录介质和使用其的磁记录装置
    • US06804822B2
    • 2004-10-12
    • US10132775
    • 2002-04-25
    • Junichi SatoKosuke WatanabeKunio KojimaHiroyuki KatayamaHiroshi FujiKenji Ohta
    • Junichi SatoKosuke WatanabeKunio KojimaHiroyuki KatayamaHiroshi FujiKenji Ohta
    • G11B724
    • G11B5/7325G11B5/012G11B5/74G11B5/82G11B11/10508G11B11/10584G11B11/10591G11B2005/0005G11B2005/0021
    • A magnetic recording medium, which includes a substrate and an amorphous magnetic layer, made of an amorphous magnetic material, for magnetic recording of data, is provided with an underlayer between the substrate and the amorphous magnetic layer, the underlayer being made of amorphous metal element, and having a mean thickness of 10 nm or less. In this manner, movement of magnetic domain walls of the amorphous magnetic layer is effectively limited by minute irregularities on a surface of the underlayer. This realizes a stable formation of a minute recording mark. This realizes recording having a sufficient signal quality, even when the high-density recording is performed by forming such a minute recording mark that a shortest length of the recording mark is less than 100 nm. Moreover, this allows the magnetic recording medium to have a simplified layer structure. Further, a magnetic recording apparatus magnetically records data onto a magnetic recording medium having the above arrangement, by heating a portion of the magnetic layer by radiating a light beam locally, and by applying a magnetic field on at least part of the portion of the magnetic layer on which the light beam is radiated. This provides a magnetic recording apparatus for high-density recording.
    • 包括由非晶磁性材料制成的用于磁记录数据的基板和非晶磁性层的磁记录介质在基板和非晶磁性层之间设置有底层,底层由非晶金属元件 平均厚度为10nm以下。 以这种方式,非晶磁性层的磁畴壁的运动被有效地限制在底层表面上的微小凹凸。 这实现了一个稳定的分钟记录标记的形成。 这实现了具有足够的信号质量的记录,即使当通过形成记录标记的最短长度小于100nm的这种微小记录标记来执行高密度记录时。 此外,这允许磁记录介质具有简化的层结构。 此外,磁记录装置将数据磁记录到具有上述结构的磁记录介质上,通过局部辐射光束加热磁性层的一部分,并且通过在磁体的至少一部分上施加磁场 光束辐射的层。 这提供了用于高密度记录的磁记录装置。
    • 7. 发明授权
    • Optical reproducing and recording method, recording medium, and optical device
    • 光学再现和记录方法,记录介质和光学装置
    • US06661745B1
    • 2003-12-09
    • US09537235
    • 2000-03-28
    • Junji TominagaNobufumi AtodaHiroshi FujiHiroyuki KatayamaKenji Ohta
    • Junji TominagaNobufumi AtodaHiroshi FujiHiroyuki KatayamaKenji Ohta
    • G11B700
    • B82Y10/00G11B7/1387G11B7/24065G11B11/10584G11B11/10586
    • An optical device and a recording medium are provided with a recording layer for recording information by radiation of light, and a mask layer which is formed closely to the recording layer, reduces its transmittance of light due to light or heat, and transmits light to the recording layer by using a near-field effect. An optical reproducing and recording method includes the steps of: emitting a laser beam onto the mask layer, generating a near field around an area of the mask layer that has transmittance being reduced by the laser beam, and reproducing or recording optical information in the recording layer by interaction between the near field and the recording layer. With this method, it is possible to provide the optical device, recording medium, and optical reproducing and recording method that can realize a high S/N ratio upon reproducing and recording and that can readily form a recording mark.
    • 光学器件和记录介质设置有用于通过照射光来记录信息的记录层和与记录层紧密相邻形成的掩模层,减少其由于光或热导致的光的透射率,并将光透射到 记录层通过使用近场效应。 光学再现和记录方法包括以下步骤:将激光束发射到掩模层上,产生围绕掩模层的区域的近场,该区域具有通过激光束减少的透射率,以及在记录中再现或记录光学信息 通过近场和记录层之间的相互作用来形成层。 利用这种方法,可以提供在再现和记录时可以实现高S / N比并且可以容易地形成记录标记的光学设备,记录介质和光学再现和记录方法。
    • 10. 发明授权
    • Air flow measurement apparatus
    • 气流测量装置
    • US06321165B1
    • 2001-11-20
    • US09215246
    • 1998-12-18
    • Kenji OhtaAtsushi Kanke
    • Kenji OhtaAtsushi Kanke
    • G01F164
    • F02D41/187F02D41/2432F02D41/2441F02D41/2474F02D41/2487G01F1/698
    • In a heating resistor type air flow measurement apparatus, flow correction data are read out from a primary memory and stored in a secondary memory, and then an air flow signal is calibrated by the flow correction data stored in the secondary memory when starting the apparatus up. The apparatus has a diagnosis unit, for determining whether or not the flow correction data stored in the primary memory are correct, so that the determination processing of the flow correction data by the diagnosis unit is performed at any time at least including the starting-up point of the apparatus. There is no fear that engine control based on abnormal flow correction data will continue.
    • 在加热电阻式空气流量测量装置中,流量校正数据从主存储器读出并存储在辅助存储器中,然后在启动装置时通过存储在辅助存储器中的流量校正数据校准空气流量信号 。 该装置具有用于确定存储在主存储器中的流量校正数据是否正确的诊断单元,使得诊断单元的流量校正数据的确定处理至少包括启动 点的设备。 不必担心基于异常流量校正数据的发动机控制将继续。