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.
Original language | English |
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IPC | H01J 43/ 08 A N |
Patent number | WO2020262254 |
Filing date | 19/06/2020 |
Country/Territory | International Bureau of the World Intellectual Property Organization (WIPO) |
Priority date | 26/06/2019 |
Priority number | EP20190182652 |
Publication status | Published - 30 Dec 2020 |