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    • 24. 发明授权
    • Low saturated magnetic field bismuth-substituted rare earth iron garnet
single crystal and its use
    • 低饱和磁场铋取代稀土铁石榴石单晶及其应用
    • US5512193A
    • 1996-04-30
    • US447592
    • 1995-05-23
    • Kazushi ShiraiKenji IshikuraNorio Takeda
    • Kazushi ShiraiKenji IshikuraNorio Takeda
    • C30B19/02C30B29/22C30B29/28G02F1/09H01F10/24
    • H01F10/245C30B19/02C30B29/28
    • A bismuth-substituted rare earth iron garnet single crystal grown on a non-magnetic substrate having a lattice constant of 12.490 .ANG.-12.510 .ANG. by the liquid phase epitaxial method, and represented by a general equation:Gd.sub.x R.sub.y Bi.sub.3-x-y Fe.sub.5-z-w Ga.sub.z Al.sub.w O.sub.12where R denotes at least one element selected from the group consisting of yttrium (Y), ytterbium (Yb) and lutetium (Lu), and x, y, z and w are numerical values in the ranges 0.50.ltoreq.y/x.ltoreq.1.35, 1.40.ltoreq.x+y.ltoreq.1.90, 0.0.ltoreq.w/z.ltoreq.0.3 and 0.7.ltoreq.z+w.ltoreq.1.25. The magneto-optic optical switch or Faraday rotator constituted by the bismuth-constituted rare iron garnet is stably operable in a temperature range of -20.degree. C. to 60.degree. C. Because of the saturated magnetic field is 160 (Oe) or less, a magnetic field application device necessary to invert the magnetic field can be miniaturized.
    • 通过液相外延法在晶格常数为12.490 ANGSTROM -12.510 ANGSTROM的非磁性基板上生长的铋取代的稀土铁石榴石单晶,由通式如下:Gd x R y B i 3-x-y Fe 5-z-w Ga z Al w O 12 其中R表示选自钇(Y),镱(Yb)和镥(Lu)的至少一种元素,x,y,z和w是0.50≤y/ x < /=1,35,1.40,其中x = y = 1.90,0.0≤w/z≤0.3,0.7≤z+ w <1.25。 由铋构成的稀有铁石榴石构成的磁光光开关或法拉第旋转体在-20℃〜60℃的温度范围内稳定可操作。由于饱和磁场为160(Oe)以下, 能够使磁场反转所需的磁场施加装置小型化。
    • 25. 发明授权
    • Polarization-independent optical isolator
    • 偏振无关光隔离器
    • US5345329A
    • 1994-09-06
    • US62552
    • 1993-05-18
    • Kazushi ShiraiToshihiko TakanoNorio TakedaMitsuzo Arii
    • Kazushi ShiraiToshihiko TakanoNorio TakedaMitsuzo Arii
    • G02B27/28G02F1/09H01S3/00G02B5/30
    • G02F1/093G02F2203/06H01S3/0064Y10S372/703
    • An optical isolator comprises two birefringent plates one of which separates two light components whose planes of polarization are perpendicular to each other to make the two light components spatially separate between the two birefringent plates and pass through two separate optical paths and the other of which thereafter combines the two separate light components, two Faraday rotators disposed between the two birefringent plates and having a Faraday rotation angle of approximately 45 degrees, a polarizer disposed between the two Faraday rotators and having a predetermined polarized-light transmitting angle, and a magnetic field device for applying an external magnetic field to the two separate optical paths in the two Faraday rotators to magnetize respective regions near the two optical paths in each of the rotators in opposite magnetization directions to each other. In this arrangement two light components entering the polarizer in the forward direction has the same angle of plane of polarization as the predetermined polarized-light transmitting angle of the polarizer so as to pass through the polarizer, but two light components entering the polarizer in the reverse direction has an angle of plane of polarization perpendicular to the predetermined polarized-light transmitting angle of the polarizer so as not to pass through the polarizer. The high performance polarization-independent optical isolator may be obtained with high isolation of more than 50 dB, which is easy in assembling or manufacturing.
    • 光隔离器包括两个双折射板,其中一个分离出两个彼此垂直的平面彼此垂直的光分量,使得两个光分量在两个双折射板之间在空间上分离并通过两个单独的光路,而另一个光组件之后组合 两个独立的光分量,两个分别位于两个双折射板之间并具有约45度的法拉第旋转角的法拉第旋转器,设置在两个法拉第旋转器之间并具有预定偏振光透射角的偏振片,以及用于 将外部磁场施加到两个法拉第转子中的两个分离的光路中,以使彼此相反的磁化方向的每个旋转体中的两个光路附近的各个区域磁化。 在该布置中,向前方向进入偏振器的两个光分量具有与偏振器的预定偏振光透射角相同的偏振平面角,以便穿过偏振器,但两个光分量相反地进入偏振器 方向具有垂直于偏振器的预定偏振光透射角的偏振平面的角度,以便不通过偏振器。 可以获得高达50dB的高隔离度的高性能偏振无关光隔离器,这在组装或制造中容易。
    • 29. 发明申请
    • Rotating irradiation apparatus
    • 旋转照射装置
    • US20070023699A1
    • 2007-02-01
    • US11472387
    • 2006-06-22
    • Tsutomu YamashitaShigeji KanekoHiroshi SagaNorio Takeda
    • Tsutomu YamashitaShigeji KanekoHiroshi SagaNorio Takeda
    • H01J37/08
    • A61N5/1081A61N5/10A61N2005/1087
    • A rotating irradiation apparatus includes a rotating gantry 3 including a front ring 19 and a rear ring 20 and is provided with a beam delivery device 11 and an irradiation device 4. The beam delivery device 11 delivers an ion beam used for particle radiotherapy. Radial support devices 61A and 61B support the front ring 19 and radial support devices 61A and 61B support the rear ring 20. Each radial support device includes a linear guide 41, an upper support structure disposed above the linear guide 41, and a lower support structure disposed below the linear guide 41. The upper support structure is movably mounted on the lower support structure and is movable in the direction of the rotational axis of the rotating gantry 3.
    • 旋转照射装置包括旋转机架3,其包括前环19和后环20,并且设置有射束输送装置11和照射装置4.射束输送装置11输送用于粒子放射治疗的离子束。 径向支撑装置61A和61B支撑前环19,并且径向支撑装置61A和61B支撑后环20.每个径向支撑装置包括线性导向件41,设置在线性导向件41上方的上支撑结构,以及 下支撑结构设置在线性引导件41的下方。上支撑结构可移动地安装在下支撑结构上并且可沿旋转机架3的旋转轴线的方向移动。
    • 30. 发明授权
    • Wavelength division multiplexing device
    • 波分复用器
    • US06295150B1
    • 2001-09-25
    • US09412615
    • 1999-10-06
    • Hisashi OhwadaToshihiko TakanoNorio TakedaKuniaki Jinnai
    • Hisashi OhwadaToshihiko TakanoNorio TakedaKuniaki Jinnai
    • H04J1402
    • H04J14/02
    • A wavelength division multiplexing device which can easily utilize existing optical fibers for increasing the transmission capacity by approximately several fold mainly in a short-range information communication network, comprising, as essential elements, a pair of 1×N optical couplers (2≦N≦16), N light emission devices in which one of peak wavelengths thereof differs from every other one by at least 30 nm and N light receivers having optical filters having light-transmission wavelength bands adjusted to correspond to said peak wavelengths, wherein the light emission devices and the light receivers having optical filters corresponding to peak wavelengths of the light emission devices form pairs, and said light emission devices of said light receivers are optically connected to N-port-side ports of one of the 1×N optical couplers.
    • 一种波分复用装置,其主要在短距离信息通信网络中可以容易地利用现有光纤将传输容量增加大约几倍,其中包括一对1xN光耦合器(2≤N≤= 16),其中峰值波长其中一个峰值波长彼此不同于30nm的N个发光器件和具有调整为对应于所述峰值波长的光透射波长带的滤光器的N个光接收器,其中发光器件 并且具有对应于发光器件的峰值波长的滤光器的光接收器形成成对,并且所述光接收器的所述发光器件光学连接到1xN光耦合器中的一个的N端口侧端口。