The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 2024
Filed:
Jun. 19, 2020
Hamamatsu Photonics K.k., Hamamatsu, JP;
Tetsuya Fujita, Hamamatsu, JP;
Takahiro Suzuki, Hamamatsu, JP;
Yasuhide Miyazaki, Hamamatsu, JP;
Naoya Kawai, Hamamatsu, JP;
Peter Uhd Jepsen, Copenhagen S, DK;
Simon Lehnskov Lange, Copenhagen NV, DK;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
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.