Title:
SMALL X-RAY TUBE HAVING EXTRACTOR
Document Type and Number:
WIPO Patent Application WO/2020/111820
Kind Code:
A1
Abstract:
The present invention relates to a small x-ray tube having an extractor, comprising: a filament for emitting electrons when a voltage is applied; a base comprising two filament through holes so as to be able to fix the filament and connect power to both poles of the filament; a cylindrical extractor in contact with the base and surrounding the filament without contacting the filament; a cutoff voltage providing unit for applying a cutoff voltage between the extractor and one pole of the filament; a body made of a ceramic material for surrounding the extractor, and of which the end of one side is in contact with the base; and a target connected to the end of the other side of the body and emitting x-rays by means of receiving electrons emitted from the filament.
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Inventors:
LEE RE NA (KR)
SHIN SUK YOUNG (KR)
KIM HYUN JIN (KR)
SHIN SUK YOUNG (KR)
KIM HYUN JIN (KR)
Application Number:
PCT/KR2019/016586
Publication Date:
June 04, 2020
Filing Date:
November 28, 2019
Export Citation:
Assignee:
RE MEDI CO LTD (KR)
International Classes:
H01J35/02; H01J35/08
Foreign References:
| KR20180046959A | 2018-05-10 | |||
| KR101506265B1 | 2015-03-26 | |||
| JP2008234907A | 2008-10-02 | |||
| KR101754780B1 | 2017-07-10 | |||
| KR20150057970A | 2015-05-28 | |||
| KR101915523B1 | 2018-11-06 |
Other References:
See also references of EP 3889991A4
Attorney, Agent or Firm:
NA, Sun Kyoon et al. (KR)
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