公开(公告)号：US11776798B2

公开(公告)日：2023-10-03

申请号：US17621322

申请日：2020-06-11

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tetsuya Fujita ,  Takahiro Suzuki ,  Yasuhide Miyazaki

IPC: H01J43/18 ,  H01J43/28

CPC classification number: H01J43/18 ,  H01J43/28

Abstract: An electron tube includes a housing having a window having an electromagnetic wave transmitting property, an electron emission plate disposed inside the housing, the electron emission plate emitting electrons, and a holding member disposed inside the housing and configured to hold the electron emission plate and to apply a voltage to the electron emission plate. The electron emission plate has a first main surface and a second main surface facing each other. The holding member has a base portion being in contact with the first main surface, and a plurality of electron emission plate biasing portions which are in contact with an edge of the second main surface and are configured to elastically bias the electron emission plate to the base portion. The holding member is electrically connected to the second main surface through the plurality of electron emission plate biasing portions.

公开(公告)号：US12176174B2

公开(公告)日：2024-12-24

申请号：US17619686

申请日：2020-06-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tetsuya Fujita ,  Takahiro Suzuki ,  Yasuhide Miyazaki ,  Naoya Kawai ,  Peter Uhd Jepsen ,  Simon Lehnskov Lange

IPC: H01J31/48 ,  H01J29/86

Abstract: An electron tube includes a housing that is internally held in a vacuum and has a window transmitting an electromagnetic wave, an electron emitting unit that is disposed in the housing and has a meta-surface emitting electrons in response to incidence of the electromagnetic wave, an electron multiplying unit that is disposed in the housing and multiplies the electrons emitted from the electron emitting unit, and an electron collecting unit that is disposed in the housing and collects the electrons multiplied by the electron multiplying unit. The window contains at least one selected from quartz, silicon, germanium, sapphire, zinc selenide, zinc sulfide, magnesium fluoride, lithium fluoride, barium fluoride, calcium fluoride, magnesium oxide, and calcium carbonate.