公开(公告)号：US1941956A

公开(公告)日：1934-01-02

申请号：US52212331

申请日：1931-03-12

Applicant: GEORG SEIBT

Inventor： GEORG SEIBT

IPC: H01J3/02

CPC classification number: H01J3/025 ,  H01J2893/0061

公开(公告)号：US1901004A

公开(公告)日：1933-03-14

申请号：US52212131

申请日：1931-03-12

Applicant: GEORG SEIBT

Inventor： GEORG SEIBT

IPC: H01J3/02

CPC classification number: H01J3/025 ,  H01J2893/0061

公开(公告)号：US1850967A

公开(公告)日：1932-03-22

申请号：US13258226

申请日：1926-08-30

Applicant: SIEMENS AG

Inventor： ERNST LUBCKE

IPC: H01J3/02

CPC classification number: H01J3/025 ,  H01J2893/0061

公开(公告)号：US1365157A

公开(公告)日：1921-01-11

申请号：US7592816

申请日：1916-02-03

Applicant: FOREST RADIO TELEPHONE AND TEL

Inventor： DE FOREST LEE

IPC: H01J3/02

CPC classification number: H01J3/025 ,  H01J2893/0061

公开(公告)号：US12272513B2

公开(公告)日：2025-04-08

申请号：US17926139

申请日：2021-05-17

Applicant: DBT GMBH

Inventor： Theodor Doll

IPC: H01J1/34 ,  G01N27/64 ,  H01J3/02

Abstract: An electron emitter structure includes an electron emission layer which is arranged to have a first side and a second side, and an electron accelerating structure which is arranged on the first side of the electron emission layer. The electron emission layer has a mixture of metals so as to be atmospherically stable. The electron accelerating structure has at least one electrode which is electrically insulated from the electron accelerating structure so as to form an acceleration path which allows electrons which are released from the electron emission layer to be selectively accelerated upon generation of an adjustable electric field. The acceleration path has a length l of from 10 nm to 1 μm.

公开(公告)号：US12237139B2

公开(公告)日：2025-02-25

申请号：US18247264

申请日：2021-09-29

Applicant: NCX Corporation

Inventor： Jian Zhang

IPC: H01J3/02 ,  H01J9/02 ,  H01J9/14 ,  H01J9/18

Abstract: A field emission cathode device and method for forming a field emission cathode device involve a cathode element having a field emission surface, and a gate electrode element disposed in spaced-apart relation to the field emission surface of the cathode element so as to define a gap therebetween, with the gate electrode element having a plurality of parallel grill members or a mesh structure laterally-extending between opposing anchored ends. A film element laterally co-extends and is engaged with the gate electrode element, with the film element being arranged to allowed electrons emitted from the field emission surface of the cathode element to pass therethrough, and to cooperate with the gate electrode element and the cathode element to form a substantially uniform electric field within the gap and about the field emission surface.

公开(公告)号：US12183536B2

公开(公告)日：2024-12-31

申请号：US17558408

申请日：2021-12-21

Applicant: GE Precision Healthcare LLC

Inventor： Kevin Kruse

IPC: H01J35/06 ,  H01J1/20 ,  H01J3/02 ,  H01J9/04 ,  H01J35/14 ,  H01J37/075

Abstract: Various methods and systems are provided for a cathode of an X-ray imaging system. A method for fabricating the cathode comprises machining a plurality of focusing features on a focusing element and welding the focusing element to a base assembly.

公开(公告)号：US12080507B2

公开(公告)日：2024-09-03

申请号：US17763186

申请日：2020-09-04

Applicant: Photo electron Soul Inc.

Inventor： Hokuto Iijima

IPC: H01J3/02 ,  H01J1/34 ,  H01J1/52 ,  H01J3/10 ,  H01J37/073

CPC classification number: H01J3/021 ,  H01J1/34 ,  H01J1/52 ,  H01J3/10 ,  H01J37/073 ,  H01J2237/06333

Abstract: An object is to provide an electron gun that makes it possible to verify whether or not an electron beam emitted form a photocathode is misaligned from a designed emission center axis. The object can be achieved by an electron gun including: a light source; a photocathode; and an anode. The electron gun includes an intermediate electrode arranged between the photocathode and the anode, an electron beam shielding member configured to block a part of an electron beam, a measurement unit configured to measure an intensity of an electron beam blocked by the electron beam shielding member, and an electron beam emission direction deflector arranged between the anode and the electron beam shielding member and configured to change a position where an electron beam that passed through the anode reaches the electron beam shielding member. The intermediate electrode has an electron beam passage hole and a drift space.

公开(公告)号：US20230411101A1

公开(公告)日：2023-12-21

申请号：US18247264

申请日：2021-09-29

Applicant: NCX Corporation

Inventor： Jian ZHANG

IPC: H01J3/02 ,  H01J9/18

CPC classification number: H01J3/021 ,  H01J9/18

Abstract: A field emission cathode device and method for forming a field emission cathode device involve a cathode element having a field emission surface, and a gate electrode element disposed in spaced-apart relation to the field emission surface of the cathode element so as to define a gap therebetween, with the gate electrode element having a plurality of parallel grill members or a mesh structure laterally-extending between opposing anchored ends. A film element laterally co-extends and is engaged with the gate electrode element, with the film element being arranged to allowed electrons emitted from the field emission surface of the cathode element to pass therethrough, and to cooperate with the gate electrode element and the cathode element to form a substantially uniform electric field within the gap and about the field emission surface.

公开(公告)号：US20230005694A1

公开(公告)日：2023-01-05

申请号：US17943446

申请日：2022-09-13

Applicant: Physical Sciences, Inc.

Inventor： Jonathan D. Rameau ,  Nicholas R. Craig

IPC: H01J1/304 ,  C09D163/00 ,  B64G1/22 ,  H01J9/02 ,  H01J3/02 ,  C09D5/24

Abstract: A triple-point cathode coating and method wherein electrically conductive NEA diamond particles cast or mixed with the adhesive medium and electrically insulative NEA diamond particles are cast or mixed with the adhesive medium to form a plurality of exposed junctions between electrically conductive diamond particles and electrically insulative diamond particles to reduce any electrical charges on a structure coated with the coating.