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公开(公告)号：US20190318900A1
公开(公告)日：2019-10-17
申请号：US16380105
申请日：2019-04-10
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi ISHII , Tutomu INAZURU
Abstract: An X-ray tube includes a rod-shaped anode which includes a target receiving electrons and generating X-rays and has a main body portion extending in a direction of a tube axis; a vacuum housing which accommodates a distal end side of the anode having the target disposed therein and in which a proximal end side of the anode is fixed by a housing coupling portion; and a cover electrode which is disposed inside the vacuum housing, is coupled to the anode by a cover coupling portion, and surrounds the housing coupling portion. The anode has a third diameter increasing portion protruding from a front surface of the main body portion in a direction intersecting the tube axis. The cover coupling portion is disposed closer to the proximal end side of the anode than the third diameter increasing portion.
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Patent Agency Ranking
公开(公告)号：US20240321542A1
公开(公告)日：2024-09-26
申请号：US18572420
申请日：2022-02-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Naonobu SUZUKI , Atsushi ISHII , Ryosuke YABUSHITA , Akimichi SHIMIZU , Naofumi KOSUGI , Ginji SUGIURA
CPC classification number: H01J35/30 , H01J35/112 , H01J35/153 , H01J35/18
Abstract: An X-ray generation device includes: a housing; an electron gun including an electron-emitting unit that emits an electron inside the housing, and an extraction electrode for extracting the electron emitted from the electron-emitting unit; a target that generates an X-ray upon an incidence of the electron inside the housing; a window member that seals an opening of the housing and that transmits the X-ray; and a tube voltage application unit that applies a tube voltage between the electron-emitting unit and the target. A thickness of the target has a distribution, and the target is disposed to be inclined with respect to an imaginary plane orthogonal to an axis of the electron gun.
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公开(公告)号：US20220246384A1
公开(公告)日：2022-08-04
申请号：US17626563
申请日：2020-07-13
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi ISHII
Abstract: An X-ray tube includes an electron gun unit, a target that generates X-rays, and a vacuum housing unit. The vacuum housing unit has a metal housing unit for supporting the target and a bulb unit formed of an insulating material and connected to the metal housing unit. The electron gun unit has a focusing electrode portion at an end portion on an emission side of the electrons, the focusing electrode portion having a tubular shape for focusing the emitted electrons. In the electron gun unit, at least a part of the focusing electrode portion is supported by the bulb unit so as to be located in the metal housing unit. When viewed from an X-ray generation position on the target, the focusing electrode portion blocks a line of sight from the X-ray generation position to the bulb unit.
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公开(公告)号：US20220238293A1
公开(公告)日：2022-07-28
申请号：US17572871
申请日：2022-01-11
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi ISHII , Akihito KOBAYASHI
Abstract: An X-ray module includes a housing in which an opening portion is formed; an electron gun that emits an electron beam; a target that transmits an X-ray generated when the electron beam is incident on the target and emits the X-ray from an X-ray-emitting surface; an X-ray-emitting window that seals the opening portion, and that transmits the X-ray and emits the X-ray to a first side in an axial direction; and a heat radiating unit disposed outside the housing. The housing includes a surface on which a protrusion protruding to the first side is formed, the opening portion is formed in the protrusion, and the target is disposed in the opening portion. The heat radiating unit includes a first portion extending along the surface and thermally connected to the surface, and a second portion extending from the first portion to a second side opposite the first side.
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公开(公告)号：US20190318903A1
公开(公告)日：2019-10-17
申请号：US16380259
申请日：2019-04-10
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi ISHII , Tutomu INAZURU
Abstract: An X-ray tube includes a metal portion in which an X-ray emission window is provided, an insulation valve which is joined to the metal portion and forms a vacuum region in cooperation with the metal portion, and a target and an electron gun which are accommodated in the vacuum region. The insulation valve has a low resistivity glass portion joined to the metal portion, and a high resistivity glass portion for fixing an anode including the target. A volume resistivity of a material forming the low resistivity glass portion is lower than a volume resistivity of a material forming the high resistivity glass portion. According to this configuration, electrification of the insulation valve is curbed, so that deterioration in withstand voltage ability of the insulation valve is curbed, and electric discharge caused by electrification is curbed.
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公开(公告)号：US20190318902A1
公开(公告)日：2019-10-17
申请号：US16380187
申请日：2019-04-10
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi ISHII , Tutomu INAZURU
Abstract: An X-ray tube includes an electron gun, a target that generates X-rays, and a vacuum housing that accommodates the electron gun and the target. The vacuum housing has a metal portion having an X-ray emission window, and an insulation valve connected to the metal portion. The metal portion has a cylinder portion in which the X-ray emission window is provided and which surrounds a tube axis of the vacuum housing, and a tapered portion which is connected to an end portion of the cylinder portion, surrounds the tube axis, and protrudes such that a connection part between the metal portion and an insulation valve is covered. The tapered portion has a shape increased in diameter such that a separation distance between a distal end portion and the tube axis is longer than a separation distance between a base end portion and the tube axis.
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