JPS55108158A - Cathode for x-ray tube - Google Patents

Cathode for x-ray tube

Info

Publication number
JPS55108158A
JPS55108158A JP1422579A JP1422579A JPS55108158A JP S55108158 A JPS55108158 A JP S55108158A JP 1422579 A JP1422579 A JP 1422579A JP 1422579 A JP1422579 A JP 1422579A JP S55108158 A JPS55108158 A JP S55108158A
Authority
JP
Japan
Prior art keywords
filament
focusing
cylindrical
anticathode
surrounded
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.)
Pending
Application number
JP1422579A
Other languages
Japanese (ja)
Inventor
Tadashi Hayashi
Sadao Nomura
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1422579A priority Critical patent/JPS55108158A/en
Publication of JPS55108158A publication Critical patent/JPS55108158A/en
Pending 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
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/06—Cathodes
    • H01J35/064—Details of the emitter, e.g. material or structure
    • 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

Abstract

PURPOSE:To achieve a high precision focus, by causing a cylindrical coil filament to project toward the anticathode, said filament being surrounded by a focusing wall relatively close thereto and rising from the bottom of a relatively wide focusing groove. CONSTITUTION:A cylindrical filament 1 is surrounded by a focusing wall 7 relatively close thereto. A recess 8 opened toward the anticathode is formed outside the periphery of the focusing wall 7. In this cathode structure, equipotential surfaces 5 have the form of concentric cylindrical surfaces with the center of the coil filament being the center of said surfaces, and further, a virtual electrode 4 of a relatively concentrated form is produced.
JP1422579A 1979-02-13 1979-02-13 Cathode for x-ray tube Pending JPS55108158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1422579A JPS55108158A (en) 1979-02-13 1979-02-13 Cathode for x-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1422579A JPS55108158A (en) 1979-02-13 1979-02-13 Cathode for x-ray tube

Publications (1)

Publication Number Publication Date
JPS55108158A true JPS55108158A (en) 1980-08-19

Family

ID=11855115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1422579A Pending JPS55108158A (en) 1979-02-13 1979-02-13 Cathode for x-ray tube

Country Status (1)

Country Link
JP (1) JPS55108158A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4868842A (en) * 1987-03-19 1989-09-19 Siemens Medical Systems, Inc. Cathode cup improvement
FR2633773A1 (en) * 1988-07-01 1990-01-05 Gen Electric Cgr RADIOGENIC TUBE WITH SELF-LIMITING ELECTRONIC FLOW
FR2633775A1 (en) * 1988-07-01 1990-01-05 Gen Electric Cgr RADIOGENIC TUBE WITH FLAT CATHODE AND INDIRECT HEATING
FR2633774A1 (en) * 1988-07-01 1990-01-05 Gen Electric Cgr SELF-ADAPTED VARIABLE FIREPLACE X-RAY TUBE
JPH02128356U (en) * 1989-03-29 1990-10-23
JP2012142114A (en) * 2010-12-28 2012-07-26 Rigaku Corp X-ray generator
US8908833B2 (en) 2010-12-28 2014-12-09 Rigaku Corporation X-ray generator

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894853A (en) * 1987-03-19 1990-01-16 Siemens Medical Systems, Inc. Cathode cup improvement
US4868842A (en) * 1987-03-19 1989-09-19 Siemens Medical Systems, Inc. Cathode cup improvement
JPH0254848A (en) * 1988-07-01 1990-02-23 General Electric Cgr Sa X-ray tube in which electron beam is automatically limited by saturation
FR2633774A1 (en) * 1988-07-01 1990-01-05 Gen Electric Cgr SELF-ADAPTED VARIABLE FIREPLACE X-RAY TUBE
FR2633775A1 (en) * 1988-07-01 1990-01-05 Gen Electric Cgr RADIOGENIC TUBE WITH FLAT CATHODE AND INDIRECT HEATING
JPH0254847A (en) * 1988-07-01 1990-02-23 General Electric Cgr Sa X-ray tube having variable focus automatically suited with load
FR2633773A1 (en) * 1988-07-01 1990-01-05 Gen Electric Cgr RADIOGENIC TUBE WITH SELF-LIMITING ELECTRONIC FLOW
US5033072A (en) * 1988-07-01 1991-07-16 General Electric Cgr S.A. Self-limiting x-ray tube with flat cathode and stair-step focusing device
US5044005A (en) * 1988-07-01 1991-08-27 General Electric Cgr S.A. X-ray tube with a flat cathode and indirect heating
US5060254A (en) * 1988-07-01 1991-10-22 General Electric Cgr S.A. X-ray tube having a variable focus which is self-adapted to the load
JPH02128356U (en) * 1989-03-29 1990-10-23
JP2012142114A (en) * 2010-12-28 2012-07-26 Rigaku Corp X-ray generator
US8908833B2 (en) 2010-12-28 2014-12-09 Rigaku Corporation X-ray generator

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