公开(公告)号：US10825638B2

公开(公告)日：2020-11-03

申请号：US16380105

申请日：2019-04-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Ishii ,  Tutomu Inazuru

IPC: H01J35/08 ,  H01J35/16

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.

公开(公告)号：USD913940S1

公开(公告)日：2021-03-23

申请号：US29665949

申请日：2018-10-09

Applicant: HAMAMATSU PHOTONICS K.K.

Designer： Atsushi Ishii ,  Ryosuke Yabushita ,  Tutomu Inazuru

公开(公告)号：US10943759B2

公开(公告)日：2021-03-09

申请号：US16380224

申请日：2019-04-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Ishii ,  Ryosuke Yabushita ,  Tutomu Inazuru

IPC: H01J35/08 ,  H01J35/16

Abstract: An X-ray tube includes a vacuum housing, an electron gun, and an anode that includes a target emitting X-rays and a target supporting portion supporting the target. The target supporting portion has an anode main body portion and a protrusion portion including a side surface portion. The anode main body portion includes an outer circumferential surface extending in a direction of a tube axis, and a connection portion formed between the side surface portion of the protrusion portion and the outer circumferential surface. An angle formed by the outer circumferential surface and the connection portion is an obtuse angle.

公开(公告)号：US10825641B2

公开(公告)日：2020-11-03

申请号：US16380259

申请日：2019-04-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Ishii ,  Tutomu Inazuru

IPC: H01J35/16 ,  H01J35/08

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.

公开(公告)号：US10825640B2

公开(公告)日：2020-11-03

申请号：US16380187

申请日：2019-04-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Ishii ,  Tutomu Inazuru

IPC: H01J35/16 ,  H01J35/08

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.