公开(公告)号：US2168780A

公开(公告)日：1939-08-08

申请号：US15828737

申请日：1937-08-10

Applicant: OISHEVSKY DIMITRY E

Inventor： OISHEVSKY DIMITRY E

IPC: H01J35/18 ,  H05G1/04

CPC classification number: H05G1/04 ,  H01J35/18 ,  H01J2235/087 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/186

公开(公告)号：US20180033581A1

公开(公告)日：2018-02-01

申请号：US15717393

申请日：2017-09-27

Applicant: NIKON METROLOGY NV

Inventor： Roger HADLAND

IPC: H01J35/02 ,  H01J29/48 ,  F16C35/04 ,  F16C33/76 ,  F16J15/16 ,  H05G1/12 ,  H02M7/10 ,  H01J35/10 ,  H01J35/04 ,  H01J35/16 ,  H02M1/32

CPC classification number: H01J35/025 ,  F16C33/768 ,  F16C35/042 ,  F16J15/16 ,  H01J29/48 ,  H01J35/04 ,  H01J35/06 ,  H01J35/101 ,  H01J35/106 ,  H01J35/108 ,  H01J35/16 ,  H01J37/065 ,  H01J2235/0236 ,  H01J2235/083 ,  H01J2235/086 ,  H01J2235/087 ,  H01J2235/1046 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/20 ,  H01J2237/2482 ,  H02M1/32 ,  H02M7/106 ,  H05G1/12

Abstract: Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode.

公开(公告)号：US09831060B2

公开(公告)日：2017-11-28

申请号：US15644003

申请日：2017-07-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Junya Kawase

IPC: A61B6/00 ,  H01J35/00 ,  H01J35/18

CPC classification number: H01J35/18 ,  H01J2235/087 ,  H01J2235/186

Abstract: Heat dissipation of a target is enhanced in a transmissive X-ray generating apparatus where an anode member constitutes a part of a container. An anode member configured to hold a target is divided into an outer anode member, which is configured to hold the target and is connected to a container, and an inner anode member, which is joined to an insulating tube and is closer to an electron emitting portion than the outer anode member is. The outer circumferential surface of the inner anode member is joined to the outer anode member via a joining member. Heat generated by the electron emitting portion is dissipated mainly from the inner anode member via the insulating tube, or directly, to an insulating liquid.

公开(公告)号：US09818571B2

公开(公告)日：2017-11-14

申请号：US14950570

申请日：2015-11-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takashi Shiozawa ,  Kazuya Tsujino ,  Koichi Tsunoda ,  Nobuhiro Ito ,  Kazuhiro Sando ,  Yoichi Ikarashi

IPC: H01J35/08 ,  H01J35/16 ,  H01J35/06 ,  H01J35/14 ,  H05G1/10

CPC classification number: H01J35/08 ,  H01J35/06 ,  H01J35/14 ,  H01J35/16 ,  H01J2235/087 ,  H01J2235/088 ,  H01J2235/168 ,  H05G1/10

Abstract: An X-ray generation tube includes: an anode including a target configured to generate X-rays under irradiation of electrons, and an anode member electrically connected to the target; a cathode including an electron emitting source configured to emit an electron beam in a direction towards the target, and a cathode member electrically connected to the electron emitting source; and an insulating tube extending between the anode member and the cathode member. The anode further includes an inner circumferential anode layer electrically connected to the anode member, the inner circumferential anode layer extending along an inner circumferential face of the insulating tube, and is remote from the cathode member.

公开(公告)号：US20170278588A1

公开(公告)日：2017-09-28

申请号：US15618458

申请日：2017-06-09

Applicant: Moxtek, Inc.

Inventor： Eric Miller ,  Bill Hansen

IPC: G21K5/08 ,  H01J35/18 ,  H05F3/04 ,  G21K5/10 ,  H01J35/08 ,  H01J35/06

CPC classification number: G21K5/08 ,  G21K5/10 ,  H01J35/06 ,  H01J35/08 ,  H01J35/18 ,  H01J2235/086 ,  H01J2235/087 ,  H05F3/04

Abstract: In one embodiment, the invention includes an x-ray source having a cathode with an elongated blade oriented substantially transverse with respect to a longitudinal axis of the cathode. The blade can be pointed towards an anode. In another embodiment, the invention includes an x-ray source having a window with an annular-shape, forming a hollow-ring. A convex portion of a half-ball-shape of an anode can extend into a hollow of the annular-shape of the window. In another embodiment, the invention includes an x-ray source having an anode with a dome shape having a concave side facing the electron emitter.

公开(公告)号：US09761406B2

公开(公告)日：2017-09-12

申请号：US14561118

申请日：2014-12-04

Applicant: CANON KABUSHIKI KAISHA

Inventor： Koichi Takasaki ,  Noritaka Ukiyo ,  Osamu Taniguchi ,  Takao Ogura

IPC: H01J35/00 ,  H01J35/16 ,  G21K1/02

CPC classification number: H01J35/16 ,  G21K1/02 ,  H01J2235/087 ,  H01J2235/165

Abstract: A radiation tube includes an enclosure having an opening portion, an electron source disposed inside the enclosure, a target unit configured to generate radiation by being bombarded with electrons emitted from the electron source, and a front shield disposed on the opening portion and joined to the target unit. The front shield has a slit-shaped opening that shields some of the radiation radiated from the target unit. The radiation is radiated through the opening in the shape of a fan beam.

公开(公告)号：US09697980B2

公开(公告)日：2017-07-04

申请号：US14010161

申请日：2013-08-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takao Ogura ,  Ichiro Nomura ,  Kazuyuki Ueda ,  Takashi Shiozawa

IPC: H01J35/16 ,  A61B6/06 ,  A61B6/00 ,  A61B6/08 ,  G21K1/02

CPC classification number: H01J35/16 ,  A61B6/06 ,  A61B6/08 ,  A61B6/40 ,  G21K1/02 ,  H01J2235/081 ,  H01J2235/086 ,  H01J2235/087 ,  H01J2235/168

Abstract: A radiation generating apparatus includes a radiation generation tube including an electron emitting source having an electron emitting member, a transmission type target, a tubular backward shielding member having an electron passing hole facing the target layer at one end, located at the electron emitting source side of the transmission type target, and connected to the periphery of the base member. The radiation generating apparatus further includes a collimator having an opening for defining an angle for extracting the radiation at the opposite side of the electron emitting source side of the transmission type target, and an adjusting device connected to the collimator, and configured to vary an opening diameter of the opening, wherein the target layer has a portion separated from a connection portion of the base member and the backward shielding member at the periphery.

公开(公告)号：US09653249B2

公开(公告)日：2017-05-16

申请号：US14440856

申请日：2013-10-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takeo Tsukamoto ,  Takao Ogura ,  Shuji Yamada ,  Yoichi Ikarashi ,  Nobuhiro Ito

IPC: H01J35/02 ,  H01J35/32 ,  H01J35/08 ,  C23C16/06 ,  G01N23/04

CPC classification number: H01J35/08 ,  C23C16/06 ,  G01N23/04 ,  H01J35/32 ,  H01J2235/081 ,  H01J2235/087

Abstract: The present invention relates to a transmission type target having a diamond base material as the transmissive base material. The transmission type target includes a target layer containing a metal carbide constituted of at least one metal selected from the group consisting of molybdenum, tantalum, and tungsten and carbon; and a diamond base material supporting the target layer. The transmission type target inhibits the composition of the target layer from varying with the drive history of the transmission type target and inhibits the output of radiation from varying over a long time.

公开(公告)号：US09620324B2

公开(公告)日：2017-04-11

申请号：US14181278

申请日：2014-02-14

Applicant: Phillip Golden ,  Scott A. Watson ,  Timothy Knowles

Inventor： Phillip Golden ,  Scott A. Watson ,  Timothy Knowles

IPC: H01J35/06 ,  H01J35/32

CPC classification number: H01J35/06 ,  H01J35/32 ,  H01J2235/062 ,  H01J2235/087

Abstract: A sealed cold cathode X-ray tube for use in small X-ray source devices is provided. In one embodiment, a sealed cold cathode X-ray tube includes an elongate member, a cathode emitter, and an anode.

公开(公告)号：US20160379794A1

公开(公告)日：2016-12-29

申请号：US15039814

申请日：2014-09-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takashi Shiozawa ,  Kazuyuki Ueda ,  Kazuya Tsujino ,  Nobuhiro Ito

IPC: H01J35/16 ,  H05G1/10 ,  A61B6/04 ,  A61B6/00 ,  H01J35/06 ,  H01J35/08

CPC classification number: H01J35/08 ,  A61B6/502 ,  G21K1/02 ,  H01J2235/087 ,  H01J2235/166

Abstract: A radiographic apparatus including a target array and an X-ray detecting unit. The target array includes a plurality of targets and a forward shielding member. The forward shielding member includes a plurality of partitions. The X-ray detecting unit includes a detecting portion. The partitions each have sloping surfaces whose angles of inclination change along an array direction.

Abstract translation: 一种放射线照相设备，包括目标阵列和X射线检测单元。 目标阵列包括多个目标和前向屏蔽部件。 前方遮蔽部件具有多个隔壁。 X射线检测单元包括检测部。 这些隔板各自具有倾斜角度，其倾斜角沿阵列方向变化。