EP0115731A3 - Scanning x-ray tube - Google Patents

Scanning x-ray tube Download PDF

Info

Publication number
EP0115731A3
EP0115731A3 EP83402529A EP83402529A EP0115731A3 EP 0115731 A3 EP0115731 A3 EP 0115731A3 EP 83402529 A EP83402529 A EP 83402529A EP 83402529 A EP83402529 A EP 83402529A EP 0115731 A3 EP0115731 A3 EP 0115731A3
Authority
EP
European Patent Office
Prior art keywords
filament
ray tube
scanning
electron beam
concentration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83402529A
Other languages
German (de)
French (fr)
Other versions
EP0115731A2 (en
Inventor
André Plessis
Emile Gabbay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric CGR SA
Original Assignee
Thomson CGR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson CGR filed Critical Thomson CGR
Publication of EP0115731A2 publication Critical patent/EP0115731A2/en
Publication of EP0115731A3 publication Critical patent/EP0115731A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/06—Cathodes
    • H01J35/066—Details of electron optical components, e.g. cathode cups

Landscapes

  • X-Ray Techniques (AREA)

Abstract

L'invention concerne un tube à rayons X à balayage, dans lequel est réalisé une déflexion d'un faisceau d'électrons (F). The invention relates to a scanning X-ray tube, in which deflects an electron beam (F).

Le tube à rayons X (10) selon l'invention comporte notam­ ment un filament (2), un élément de concentration (3) adossé au filament (2) et une cible anodique (4); le filament (2) et l'élé­ ment de concentration (3) forment une cathode (C1) émettant le faisceau d'électrons (F). L'élément de concentration (3) est constitué par deux pièces métalliques (12, 13) électriquement isolées l'une de l'autre et du filament (2). Une polarisation indé­ pendante des deux pièces métalliques (12, 13) par rapport au filament (2) permet d'obtenir une déflexion du faisceau d'élec­ trons (F) par effet électrostatique. The X-ray tube (10) according to the invention notably includes a filament (2), an element of concentration (3) backed to the filament (2) and an anode target (4); the filament (2) and the element concentration concentrator (3) form a cathode (C1) emitting the electron beam (F). The focus (3) is consisting of two metallic parts (12, 13) electrically isolated from each other and from the filament (2). Indie polarization hanging from the two metal parts (12, 13) relative to the filament (2) allows deflection of the electric beam sections (F) by electrostatic effect.

L'invention est applicable notamment aux installations de radiologie numérique. The invention is applicable in particular to installations for digital radiology.

EP83402529A 1982-12-30 1983-12-23 Scanning x-ray tube Withdrawn EP0115731A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8222072A FR2538948B3 (en) 1982-12-30 1982-12-30 SCANNING X-RAY TUBE
FR8222072 1982-12-30

Publications (2)

Publication Number Publication Date
EP0115731A2 EP0115731A2 (en) 1984-08-15
EP0115731A3 true EP0115731A3 (en) 1985-11-21

Family

ID=9280681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402529A Withdrawn EP0115731A3 (en) 1982-12-30 1983-12-23 Scanning x-ray tube

Country Status (2)

Country Link
EP (1) EP0115731A3 (en)
FR (1) FR2538948B3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689809A (en) * 1982-11-23 1987-08-25 Elscint, Inc. X-ray tube having an adjustable focal spot
FR2658002B1 (en) * 1990-02-02 1992-05-22 Gen Electric Cgr DIEDRE DEFLECTION CATHODE FOR X-RAY TUBE.
FR2667723B1 (en) * 1990-10-09 1992-11-27 Gen Electric Cgr DEVICE FOR OBTAINING AND SWITCHING HIGH POLARIZATION VOLTAGES OF X-RAY TUBE ELECTRODES.
FR2675629B1 (en) * 1991-04-17 1997-05-16 Gen Electric Cgr CATHODE FOR X-RAY TUBE AND TUBE THUS OBTAINED.
DE19510048C2 (en) * 1995-03-20 1998-05-14 Siemens Ag X-ray tube

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646379A (en) * 1970-05-18 1972-02-29 Machlett Lab Inc X-ray tube having controllable focal spot size
DE2249365A1 (en) * 1972-10-09 1974-04-25 Siemens Ag ROENTINE PIPE
US3875028A (en) * 1972-08-30 1975-04-01 Picker Corp Method of manufacture of x-ray tube having focusing cup with non emitting coating
US3962583A (en) * 1974-12-30 1976-06-08 The Machlett Laboratories, Incorporated X-ray tube focusing means
EP0032385A1 (en) * 1980-01-14 1981-07-22 Siemens Aktiengesellschaft Cathodes arrangement for an X-ray tube
FR2536583A1 (en) * 1982-11-23 1984-05-25 Elscint Inc X=ray tube with adjustable focal range

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646379A (en) * 1970-05-18 1972-02-29 Machlett Lab Inc X-ray tube having controllable focal spot size
US3875028A (en) * 1972-08-30 1975-04-01 Picker Corp Method of manufacture of x-ray tube having focusing cup with non emitting coating
DE2249365A1 (en) * 1972-10-09 1974-04-25 Siemens Ag ROENTINE PIPE
US3962583A (en) * 1974-12-30 1976-06-08 The Machlett Laboratories, Incorporated X-ray tube focusing means
EP0032385A1 (en) * 1980-01-14 1981-07-22 Siemens Aktiengesellschaft Cathodes arrangement for an X-ray tube
FR2536583A1 (en) * 1982-11-23 1984-05-25 Elscint Inc X=ray tube with adjustable focal range

Also Published As

Publication number Publication date
FR2538948B3 (en) 1985-10-18
EP0115731A2 (en) 1984-08-15
FR2538948A1 (en) 1984-07-06

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): CH DE FR GB LI

PUAL Search report despatched

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860722

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GABBAY, EMILE

Inventor name: PLESSIS, ANDRE