Title:
X-RAY TUBE
Document Type and Number:
WIPO Patent Application WO/2017/221743
Kind Code:
A1
Abstract:
An x-ray tube is provided with a negative electrode (2) and a positive electrode. The negative electrode has a filament coil (5) and a focusing electrode (10) that includes a valley bottom part (M), a first inclined plane (11) rising from the valley bottom part (M) and inclined in the direction of the positive electrode, a first focusing channel (21), and a first receiving channel (31). The positive electrode has a target surface. θ1 > 0°. The filament coil (5), the first receiving channel (31), and the first focusing channel (21) are positioned more to a third extended line side than a first reference plane (S1). One end part (31e2) of the first receiving channel (31) is closer to the first reference plane (S1) than the other end part (31e1).
Inventors:
SHIMONO TAKASHI (JP)
TAKAHASHI NAOKI (JP)
TAKAHASHI NAOKI (JP)
Application Number:
PCT/JP2017/021449
Publication Date:
December 28, 2017
Filing Date:
June 09, 2017
Export Citation:
Assignee:
TOSHIBA ELECTRON TUBES & DEVIC (JP)
International Classes:
H01J35/14; H01J35/06
Foreign References:
| US4685118A | 1987-08-04 | |||
| JPS52120556U | 1977-09-13 | |||
| US4823371A | 1989-04-18 | |||
| US1923876A | 1933-08-22 | |||
| JPS60192357U | 1985-12-20 | |||
| JPH05121020A | 1993-05-18 |
Other References:
See also references of EP 3474306A4
Attorney, Agent or Firm:
S & S INTERNATIONAL PPC (JP)
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