IT1037741B - Sistema di lente a griglia per tubi elettronici specialmente per tubi a raggi x - Google Patents

Sistema di lente a griglia per tubi elettronici specialmente per tubi a raggi x

Info

Publication number
IT1037741B
IT1037741B IT22870/75A IT2287075A IT1037741B IT 1037741 B IT1037741 B IT 1037741B IT 22870/75 A IT22870/75 A IT 22870/75A IT 2287075 A IT2287075 A IT 2287075A IT 1037741 B IT1037741 B IT 1037741B
Authority
IT
Italy
Prior art keywords
tubes
lens system
electronic
grid lens
ray
Prior art date
Application number
IT22870/75A
Other languages
English (en)
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Application granted granted Critical
Publication of IT1037741B publication Critical patent/IT1037741B/it

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/52—Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode
    • 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
    • H01J35/045—Electrodes for controlling the current of the cathode ray, e.g. control grids
    • 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
    • H01J35/147—Spot size control

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
IT22870/75A 1974-05-03 1975-04-30 Sistema di lente a griglia per tubi elettronici specialmente per tubi a raggi x IT1037741B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US466728A US3916202A (en) 1974-05-03 1974-05-03 Lens-grid system for electron tubes

Publications (1)

Publication Number Publication Date
IT1037741B true IT1037741B (it) 1979-11-20

Family

ID=23852871

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22870/75A IT1037741B (it) 1974-05-03 1975-04-30 Sistema di lente a griglia per tubi elettronici specialmente per tubi a raggi x

Country Status (8)

Country Link
US (1) US3916202A (it)
BE (1) BE828673A (it)
CA (1) CA1034181A (it)
CH (1) CH614313A5 (it)
DE (1) DE2518688C2 (it)
ES (1) ES437333A1 (it)
FR (1) FR2286499A1 (it)
IT (1) IT1037741B (it)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5496985A (en) * 1978-01-18 1979-07-31 Toshiba Corp X-ray tube
US4334153A (en) * 1980-09-29 1982-06-08 General Electric Company X-Ray tube grid bias supply
DE3107949A1 (de) * 1981-03-02 1982-09-16 Siemens AG, 1000 Berlin und 8000 München Roentgenroehre
FR2513061A1 (fr) * 1981-06-12 1983-03-18 Thomson Csf Dispositif de polarisation multiple de cathode de tube a rayons x et source radiogene comportant un tel dispositif
US4689809A (en) * 1982-11-23 1987-08-25 Elscint, Inc. X-ray tube having an adjustable focal spot
US4764947A (en) * 1985-12-04 1988-08-16 The Machlett Laboratories, Incorporated Cathode focusing arrangement
US4825123A (en) * 1986-12-31 1989-04-25 General Electric Company Two-piece cathode cup
US4868842A (en) * 1987-03-19 1989-09-19 Siemens Medical Systems, Inc. Cathode cup improvement
FR2633775B1 (fr) * 1988-07-01 1995-11-17 Gen Electric Cgr Tube radiogene a cathode plane et a chauffage indirect
US5543625A (en) * 1994-05-20 1996-08-06 Finnigan Corporation Filament assembly for mass spectrometer ion sources
US5623530A (en) * 1996-09-17 1997-04-22 General Electric Company Cathode cup assembly for an x-ray tube
US6438207B1 (en) 1999-09-14 2002-08-20 Varian Medical Systems, Inc. X-ray tube having improved focal spot control
US6888922B2 (en) * 2001-10-18 2005-05-03 Ge Medical Systems Global Technology Co., Llc Filament circuit resistance adjusting apparatus technical field
US20030095632A1 (en) 2001-11-20 2003-05-22 Philips Medical Systems (Cleveland), Inc. X-ray tube cathode cup structure for focal spot deflection
EP1449231B1 (en) * 2001-11-20 2010-06-23 Koninklijke Philips Electronics N.V. X-ray tube cathode cup structure for focal spot deflection
US7257194B2 (en) * 2004-02-09 2007-08-14 Varian Medical Systems Technologies, Inc. Cathode head with focal spot control
WO2007135614A1 (en) * 2006-05-22 2007-11-29 Philips Intellectual Property & Standards Gmbh X-ray tube whose electron beam is manipulated synchronously with the rotational anode movement
WO2010061332A1 (en) 2008-11-26 2010-06-03 Philips Intellectual Property & Standards Gmbh Auxiliary grid electrode for x-ray tubes
US8134290B2 (en) * 2009-04-30 2012-03-13 Scientific Instrument Services, Inc. Emission filaments made from a rhenium alloy and method of manufacturing thereof
US9524845B2 (en) 2012-01-18 2016-12-20 Varian Medical Systems, Inc. X-ray tube cathode with magnetic electron beam steering
EP2869327B1 (en) * 2012-07-02 2023-10-25 Canon Electron Tubes & Devices Co., Ltd. X-ray tube
US10032595B2 (en) * 2016-02-29 2018-07-24 General Electric Company Robust electrode with septum rod for biased X-ray tube cathode
CN106158563B (zh) * 2016-08-31 2018-05-22 成都凯赛尔电子有限公司 一种2.5mm焦点的螺旋阴极聚焦方法
RU168725U1 (ru) * 2016-09-09 2017-02-17 Общество с ограниченной ответственностью Совместное русско-французское предприятие "СпектрАп" Рентгеновская диагностическая трубка
CN110676144B (zh) * 2019-09-17 2022-01-21 中国科学院国家空间科学中心 一种x射线管阴极结构
US12046441B2 (en) * 2021-12-21 2024-07-23 GE Precision Healthcare LLC X-ray tube cathode focusing element

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1203495A (en) * 1913-05-09 1916-10-31 Gen Electric Vacuum-tube.
DE367707C (de) * 1920-05-16 1923-01-25 C H F Mueller Roentgenroehrenf Gluehkathoden-Roentgenroehre zur Erzeugung scharfer Roentgenbilder
US2053792A (en) * 1933-07-19 1936-09-08 Henry K Huppert X-ray generator
US2173165A (en) * 1936-05-16 1939-09-19 Rca Corp Electron tube
US2215426A (en) * 1939-04-07 1940-09-17 Machlett Lab Inc X-ray tube
US2308800A (en) * 1941-02-15 1943-01-19 Bell Telephone Labor Inc Electron discharge device
US2518472A (en) * 1949-02-03 1950-08-15 Heil Oskar Electron gun
GB701050A (en) * 1950-03-22 1953-12-16 Werner Ehrenberg Improvements in or relating to x-ray tubes
US2665384A (en) * 1950-07-18 1954-01-05 Hubert P Yockey Ion accelerating and focusing system
DE903017C (de) * 1951-01-31 1954-02-01 Sueddeutsche Lab G M B H Herstellung kleiner Kugeln aus hochschmelzbaren Materialien
US3141993A (en) * 1959-12-24 1964-07-21 Zeiss Jena Veb Carl Very fine beam electron gun
US3452241A (en) * 1966-09-06 1969-06-24 Rca Corp Electron gun suitable for electron microscope

Also Published As

Publication number Publication date
DE2518688C2 (de) 1987-01-29
CH614313A5 (it) 1979-11-15
DE2518688A1 (de) 1975-11-13
US3916202A (en) 1975-10-28
FR2286499B1 (it) 1982-08-20
BE828673A (fr) 1975-09-01
CA1034181A (en) 1978-07-04
ES437333A1 (es) 1977-10-01
FR2286499A1 (fr) 1976-04-23

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