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    • 2. 发明授权
    • X-ray computed tomography apparatus
    • X射线计算机断层摄影装置
    • US06215844B1
    • 2001-04-10
    • US09366753
    • 1999-08-04
    • Akira AdachiToshihiro Rifu
    • Akira AdachiToshihiro Rifu
    • A61B600
    • A61B6/032A61B6/06A61B6/4021A61B6/583
    • In an X-ray computed tomography apparatus, an X-ray tube for generating an X-ray is opposed to a main X-ray detector in order to acquire a projection data set necessary to reconstruct a tomogram. A first sub X-ray detector is arranged at the righthand of the main X-ray detector. A second sub X-ray detector is arranged at the lefthand of the main X-ray detector. Arranging the sub X-ray detectors adjacent to the respective opposite sides of the main X-ray detector enables accurate detection of the shift of an X-ray radiation field, and hence enables the reduction of errors due to the shift.
    • 在X射线计算机断层摄影装置中,用于产生X射线的X射线管与主X射线检测器相对,以获得重建断层图像所需的投影数据集。 第一副X射线检测器设置在主X射线检测器的右侧。 第二副X射线检测器设置在主X射线检测器的左侧。 将副X射线检测器配置在与主X射线检测器的相对侧相邻的位置,能够精确地检测X射线照射场的偏移,因此能够减少由于偏移引起的误差。
    • 5. 发明授权
    • Spectroscope and microspectroscope equipped therewith
    • 分光镜和配有其的显微光谱仪
    • US07256890B2
    • 2007-08-14
    • US11281536
    • 2005-11-18
    • Hisao OsawaNaoshi AikawaAkira Adachi
    • Hisao OsawaNaoshi AikawaAkira Adachi
    • G01J3/28G01J3/447
    • G02B27/286G01B9/04G01J3/02G01J3/0205G01J3/021G01J3/0224G01J3/0235G01J3/0256G01J3/0294G01J3/18G01N21/21
    • A spectroscope capable of suppressing the dimension and the cost with avoiding a problem caused by polarization dependency of the diffraction grating. The spectroscope includes a polarizing beam splitter plate 3 that divides the light from an input fiber 1 into a first and a second optical paths and polarizes each light of each optical path having different direction of polarization with each other, a Fresnel rhomb half wave plate 5 that arranges the direction of polarization of the light in the first optical path into that in the second optical path and a plane mirror 4 that deflects the second optical path such that at least a portion of an area where the light through the first optical path is incident on the diffraction grating 6 and an area where the light through the second optical path is incident on the diffraction grating overlap each other.
    • 能够抑制衍射光栅的偏振依赖性引起的问题的能够抑制尺寸和成本的分光器。 分光镜包括:偏振分束板3,其将来自输入光纤1的光分成第一和第二光路,并且使具有不同偏振方向的每个光路的每个光彼此偏振;菲涅耳菱形半波片5 其将第一光路中的光的偏振方向排列成第二光路中的偏振方向,以及平面镜4,其使第二光路偏转,使得通过第一光路的光的至少一部分区域为 入射在衍射光栅6上的入射光和穿过第二光路的光入射到衍射光栅上的区域彼此重叠。