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41. 发明授权

US06621620B2 Optical amplification system using Raman amplification 有权
标题翻译：光放大系统采用拉曼放大
公开(公告)号：US06621620B2
公开(公告)日：2003-09-16
申请号：US09960979
申请日：2001-09-25
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： H01S300
CPC分类号： H01S3/06754 , H01S3/06766 , H01S3/0677 , H01S3/10015 , H01S3/10023 , H01S3/1301 , H01S3/302
摘要： An optical amplification system connected via a connector to an optical transmission path through which Raman excitation lights are sent out prevents the Raman excitation lights from entering and keeps the Laser Safety function caused by the detection of reflection light when the optical connector is disconnected. The optical amplification system includes an optical amplifier to amplify optical main signals; an optical receiver element to detect reflection lights from an end face of the connector, when the connector is disconnected; a circuit to reduction control the output power of the optical amplifier, based on the detection of the reflection light by the optical receiver element; and a blocking filter inserted between the optical amplifier and the connector, for blocking the Raman excitation lights.
摘要翻译：通过连接器连接到发送拉曼激发光的光传输路径的光放大系统防止拉曼激发光进入并保持当光连接器断开时由反射光检测引起的激光安全功能。光放大系统包括放大光信号的光放大器; 光接收元件，用于当连接器断开时检测来自连接器端面的反射光; 基于光接收元件的反射光的检测来减少控制光放大器的输出功率的电路; 以及插入在光放大器和连接器之间的阻挡滤波器，用于阻挡拉曼激发光。

42. 发明授权

US5811682A Electromagnetic acoustic transducer EMAT and inspection system with EMAR 失效
标题翻译： EMAR电磁声换能器EMAT和检测系统
公开(公告)号：US5811682A
公开(公告)日：1998-09-22
申请号：US766471
申请日：1996-12-12
申请人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
发明人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
IPC分类号： B06B1/04 , G01N29/11 , G01N29/24 , G01N29/44 , G06F3/06
CPC分类号： G01N29/48 , B06B1/04 , G01N29/11 , G01N29/2412 , G06F3/0601 , G01N2291/014 , G01N2291/0422 , G01N2291/0423 , G01N2291/101 , G01N2291/102 , G06F2003/0692
摘要： An electromagnetic acoustic transducer for magnets and a sheet type coil unit. The magnets are permanent magnets or electromagnets to provide a static magnetic field to an object to be inspected. The coil unit includes a pair of spiral or meander coils of an electrically conductive material, sandwiched between upper and middle insulation sheet and middle and lower insulation sheet. The coils are used for transmission and reception, respectively. All the ends of the respective coils extend through throughholes formed through the upper and middle insulation sheets to the surface of the ultrasonic transducer, and are connected to external leads. The ends for earth are commonly connected to form a common ground terminal. The inspection system with the electromagnetic acoustic resonance which is a combination of resonant technique and a non-contact electromagnetic acoustic transducer can evaluates the absolute value of ultrasonic attenuation. The attenuation is highly sensitive to the accumulated fatigue damage, showing a maximum around 20-30% of the whole life. This system can assess damage and predict the fatigue life of metals.
摘要翻译：一种用于磁体的电磁声换能器和片式线圈单元。磁体是永磁体或电磁体，以向被检查物体提供静态磁场。线圈单元包括一对导电材料的螺旋或曲折线圈，夹在中间和中间绝缘片和中间和下部绝缘片之间。线圈分别用于发送和接收。各个线圈的所有端部延伸通过上绝缘片和中间绝缘片形成的通孔到超声波换能器的表面，并且连接到外部引线。地极端部通常连接形成公共接地端子。具有谐振技术和非接触电磁换能器组合的电磁声共振检测系统可以评估超声波衰减的绝对值。衰减对累积的疲劳损伤高度敏感，最大值在整个寿命的20-30％左右。该系统可以评估损坏并预测金属的疲劳寿命。

43. 发明授权

US4998033A Gas dynamic bearing for spindle motor 失效
标题翻译：主轴电机气动轴承
公开(公告)号：US4998033A
公开(公告)日：1991-03-05
申请号：US506183
申请日：1990-04-09
申请人： Yasushi Hisabe , Noriyuki Osada , Toshihiro Ohtani , Masahiko Kishi , Yoshio Sato , Daisuke Konno , Sachihiko Miwa , Toshiya Kanamori , Shunichi Aiyoshizawa , Kazuyuki Kasahara , Kazuto Hirokawa , Yumiko Noda
发明人： Yasushi Hisabe , Noriyuki Osada , Toshihiro Ohtani , Masahiko Kishi , Yoshio Sato , Daisuke Konno , Sachihiko Miwa , Toshiya Kanamori , Shunichi Aiyoshizawa , Kazuyuki Kasahara , Kazuto Hirokawa , Yumiko Noda
IPC分类号： G11B19/20 , H02K5/16
CPC分类号： F16C17/107 , F16C25/045 , F16C27/08 , G11B19/2009 , H02K5/1677 , F16C2206/40 , F16C2370/12 , F16C27/063
摘要： A spindle motor comprising a stator including a support shaft positioned on a base, a cap-shaped rotor rotatably and concentrically disposed around the support shaft, thrust and radial bearings disposed between the stator and the rotor, a stator coil secured to the stator, and a rotor magnet member secured to the rotor opposing the stator coil. The thrust and radial bearings are hydrodynamic bearings. A movable piece that constitutes a part of the thrust bearing is secured to the lower end of a cylindrical portion of the rotor and extended outwardly or inwardly from the cylindrical portion, or is disposed above the rotor. The stator coil is secured to the outer peripheral portion of the support shaft above or below the radial bearing. The rotor magnet member is securd to the inner peripheral surface or inner top surface of the rotor. Either a radial or axial gap is provided between the stator coil and the rotor magnet member.

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