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公开(公告)号：US08913719B2
公开(公告)日：2014-12-16
申请号：US13780131
申请日：2013-02-28
Applicant: Rigaku Corporation
Inventor： Masaru Kuribayashi , Masahiro Nonoguchi , Masashi Kageyama
Abstract: An electron gun having: a cathode for emitting electrons; a first Wehnelt electrode equipped with a first aperture through which electrons are allowed to pass; and a second Wehnelt electrode that is equipped with a second aperture disposed at a predetermined position with respect to the cathode and the first aperture, and that is furnished at a position closer to the cathode than the first Wehnelt electrode, wherein: the cathode and the second Wehnelt electrode are included within a single assembly constituting a unitary body; and the assembly is detachably attached to the first Wehnelt electrode. Replacement of the cathode can be performed by detaching the cathode unit from the first Wehnelt electrode, and then ejecting the cathode unit out from the Wehnelt cover. The emitter of the cathode can thereby be reliably positioned with respect to the second aperture.
Abstract translation: 一种具有：用于发射电子的阴极的电子枪; 配备有第一孔的第一个Wehnelt电极，使电子通过该第一孔; 以及第二Wehnelt电极，其配备有相对于阴极和第一孔设置在预定位置处的第二孔，并且设置在比第一Wehnelt电极更靠近阴极的位置，其中：阴极和 第二个Wehnelt电极包含在构成单体的单个组件中; 并且组件可拆卸地附接到第一Wehnelt电极。 可以通过将阴极单元从第一Wehnelt电极分离出来，然后将阴极单元从Wehnelt盖中排出来进行阴极的更换。 因此，阴极的发射极可以相对于第二孔可靠地定位。
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公开(公告)号：US12196690B2
公开(公告)日：2025-01-14
申请号：US17989720
申请日：2022-11-18
Applicant: RIGAKU CORPORATION , TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Masashi Kageyama , Kenichi Okajima , Masaru Kuribayashi , Yuzo Miura , Yuichi Nagamatsu
IPC: G01N23/041
Abstract: There is provided a technique for non-destructively and relatively easily acquiring orientation information of an anisotropic material even for a large-sized object. An object is irradiated with X-rays in a tangential direction of a curved anisotropic material from a radiation source of a phase-contrast X-ray optical system. A scattering image is then obtained using a detection signal of X-rays having penetrated through the object. Structure information of the anisotropic material is acquired based on the scattering image.
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公开(公告)号：US11487043B2
公开(公告)日：2022-11-01
申请号：US17338293
申请日：2021-06-03
Applicant: Rigaku Corporation
Inventor： Masashi Kageyama , Kenichi Okajima , Kouichi Katou
IPC: G01N23/041 , G01V5/00
Abstract: An X-ray image generation device includes a moving mechanism that moves an object relative to a grating part in a direction crossing X-rays emitted toward the grating part. The grating part includes N (2≤N) regions along the direction of movement by the moving mechanism. A cyclic direction of a grating structure in each of the plurality of gratings belonging to an ith (1≤i≤N−1) region out of the N regions and a cyclic direction of a grating structure in each of the plurality of gratings belonging to an (i+1)th region out of the N regions are different directions. The plurality of gratings are configured so that moiré interference fringes generated in the N regions have a cyclic intensity fluctuation measurable by the detector and of at least one cycle or more in the direction of movement by the moving mechanism.
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公开(公告)号：US20190086341A1
公开(公告)日：2019-03-21
申请号：US16085464
申请日：2017-02-20
Applicant: Tohoku University , Rigaku Corporation
Inventor： Atsushi Momose , Takafumi Koike , Masashi Kageyama
IPC: G01N23/041 , A61B6/00 , G01N23/20 , G06T7/00 , G06T7/11
Abstract: First ROI pixel values of a first region of interest 101 of a radiographic intensity distribution image 10, and second ROI pixel values of a second region of interest 102 of the radiographic intensity distribution image 10, are acquired. One of the first and second regions of interest is set to be at a position, or vicinity thereof, where a phase difference in the intensity modulation period within the radiographic intensity distribution image, with respect to the other region of interest, becomes π/2. Next, an elliptical locus obtained by plotting the first and second ROI pixel values for each radiographic intensity distribution image is determined. k angle region images are then acquired using the radiographic intensity distribution images corresponding to at least k angle regions that have been obtained by dividing the elliptical locus for each given angle. A radiographic image is then generated using the k angle region images. k is an integer of three or more.
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Patent Agency Ranking
公开(公告)号：US20210382196A1
公开(公告)日：2021-12-09
申请号：US17338293
申请日：2021-06-03
Applicant: Rigaku Corporation
Inventor： Masashi Kageyama , Kenichi Okajima , Kouichi Katou
IPC: G01V5/00
Abstract: An X-ray image generation device includes a moving mechanism that moves an object relative to a grating part in a direction crossing X-rays emitted toward the grating part. The grating part includes N (2≤N) regions along the direction of movement by the moving mechanism. A cyclic direction of a grating structure in each of the plurality of gratings belonging to an ith (1≤i≤N−1) region out of the N regions and a cyclic direction of a grating structure in each of the plurality of gratings belonging to an (i+1)th region out of the N regions are different directions. The plurality of gratings are configured so that moiré interference fringes generated in the N regions have a cyclic intensity fluctuation measurable by the detector and of at least one cycle or more in the direction of movement by the moving mechanism.
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公开(公告)号：US10533957B2
公开(公告)日：2020-01-14
申请号：US16085464
申请日：2017-02-20
Applicant: Tohoku University , Rigaku Corporation
Inventor： Atsushi Momose , Takafumi Koike , Masashi Kageyama
IPC: A61B6/00 , G01N23/041 , G06T7/11 , G01N23/20 , G06T7/00
Abstract: First ROI pixel values of a first region of interest 101 of a radiographic intensity distribution image 10, and second ROI pixel values of a second region of interest 102 of the radiographic intensity distribution image 10, are acquired. One of the first and second regions of interest is set to be at a position, or vicinity thereof, where a phase difference in the intensity modulation period within the radiographic intensity distribution image, with respect to the other region of interest, becomes π/2. Next, an elliptical locus obtained by plotting the first and second ROI pixel values for each radiographic intensity distribution image is determined. k angle region images are then acquired using the radiographic intensity distribution images corresponding to at least k angle regions that have been obtained by dividing the elliptical locus for each given angle. A radiographic image is then generated using the k angle region images. k is an integer of three or more.
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公开(公告)号：US11636995B2
公开(公告)日：2023-04-25
申请号：US17213766
申请日：2021-03-26
Applicant: Rigaku Corporation
Inventor： Masahiro Nonoguchi , Masashi Kageyama
Abstract: An X-ray generation device includes: a sealed X-ray tube including a cathode and an anode; a magnetic field generation portion applying a magnetic field to the electron beam, the magnetic field extending in a first direction, which crosses a traveling direction of the electron beam; and a rotary drive system configured to rotate the sealed X-ray tube, the anode having a surface including a first region and a second region arranged on one side and another side, with respect to a straight division line, the first region having a first metal arranged therein, and the second region having a second metal arranged therein, the second metal being different from the first metal, and by means of the rotary drive system rotating the sealed X-ray tube, the sealed X-ray tube being arranged with respect to the magnetic field generation portion so that the straight division line lies along the first direction.
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公开(公告)号：US10283313B2
公开(公告)日：2019-05-07
申请号：US15145107
申请日：2016-05-03
Applicant: Rigaku Corporation
Inventor： Masahiro Nonoguchi , Manabu Noguchi , Koichi Kato , Ryuji Nishida , Yuji Kusaka , Masashi Kageyama , Tomohiro Chaki
Abstract: Provided are an X-ray generator capable of easily measuring a beam size of an electron beam on an electron target, and an adjustment method therefor. The X-ray generator includes an electron target including a first metal, a second metal different from the first metal, and a third metal different from the second metal, which are sequentially arranged side by side along a first direction in a continuous manner.
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公开(公告)号：US20130259197A1
公开(公告)日：2013-10-03
申请号：US13780131
申请日：2013-02-28
Applicant: RIGAKU CORPORATION
Inventor： Masaru KURIBAYASHI , Masahiro Nonoguchi , Masashi Kageyama
Abstract: An electron gun having: a cathode for emitting electrons; a first Wehnelt electrode equipped with a first aperture through which electrons are allowed to pass; and a second Wehnelt electrode that is equipped with a second aperture disposed at a predetermined position with respect to the cathode and the first aperture, and that is furnished at a position closer to the cathode than the first Wehnelt electrode, wherein: the cathode and the second Wehnelt electrode are included within a single assembly constituting a unitary body; and the assembly is detachably attached to the first Wehnelt electrode. Replacement of the cathode can be performed by detaching the cathode unit from the first Wehnelt electrode, and then ejecting the cathode unit out from the Wehnelt cover. The emitter of the cathode can thereby be reliably positioned with respect to the second aperture.
Abstract translation: 一种具有：用于发射电子的阴极的电子枪; 配备有第一孔的第一个Wehnelt电极，使电子通过该第一孔; 以及第二Wehnelt电极，其配备有相对于阴极和第一孔设置在预定位置处的第二孔，并且设置在比第一Wehnelt电极更靠近阴极的位置，其中：阴极和 第二个Wehnelt电极包含在构成单体的单个组件中; 并且组件可拆卸地附接到第一Wehnelt电极。 可以通过将阴极单元从第一Wehnelt电极分离出来，然后将阴极单元从Wehnelt盖中排出来进行阴极的更换。 因此，阴极的发射极可以相对于第二孔可靠地定位。
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