FR2417850A1 - ELECTRON DISCHARGE DEVICE, WITH DYNAMIC FOCUS CORRECTION - Google Patents

ELECTRON DISCHARGE DEVICE, WITH DYNAMIC FOCUS CORRECTION

Info

Publication number
FR2417850A1
FR2417850A1 FR7904479A FR7904479A FR2417850A1 FR 2417850 A1 FR2417850 A1 FR 2417850A1 FR 7904479 A FR7904479 A FR 7904479A FR 7904479 A FR7904479 A FR 7904479A FR 2417850 A1 FR2417850 A1 FR 2417850A1
Authority
FR
France
Prior art keywords
electron discharge
discharge device
focus correction
dynamic focus
crossing
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.)
Granted
Application number
FR7904479A
Other languages
French (fr)
Other versions
FR2417850B1 (en
Inventor
Kenneth William Hawken
Bozidar Janko
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.)
Tektronix Inc
Original Assignee
Tektronix Inc
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 Tektronix Inc filed Critical Tektronix Inc
Publication of FR2417850A1 publication Critical patent/FR2417850A1/en
Application granted granted Critical
Publication of FR2417850B1 publication Critical patent/FR2417850B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes

Abstract

L'invention concerne les dispositifs à décharge d'électrons. Elle se caractérise par la combinaison de deux moyens de lentille électronique 22, 24 et 26, 30 pour obtenir un deuxième croisement C2 du faisceau d'électrons 36, avec une tension variable 46 appliquée à l'un de ces moyens pour régler la position de ce croisement et refocaliser le faisceau sur l'écran de visualisation 48. L'invention s'applique aux tubes cathodiques à correction dynamique de la focalisation.The invention relates to electron discharge devices. It is characterized by the combination of two electronic lens means 22, 24 and 26, 30 to obtain a second crossing C2 of the electron beam 36, with a variable voltage 46 applied to one of these means to adjust the position of this crossing and refocusing the beam on the display screen 48. The invention applies to cathode ray tubes with dynamic correction of the focusing.

FR7904479A 1978-02-15 1979-02-14 ELECTRON DISCHARGE DEVICE, WITH DYNAMIC FOCUS CORRECTION Granted FR2417850A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87804278A 1978-02-15 1978-02-15

Publications (2)

Publication Number Publication Date
FR2417850A1 true FR2417850A1 (en) 1979-09-14
FR2417850B1 FR2417850B1 (en) 1981-10-09

Family

ID=25371251

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7904479A Granted FR2417850A1 (en) 1978-02-15 1979-02-14 ELECTRON DISCHARGE DEVICE, WITH DYNAMIC FOCUS CORRECTION

Country Status (6)

Country Link
JP (1) JPS54122085A (en)
CA (1) CA1132649A (en)
DE (1) DE2905479C2 (en)
FR (1) FR2417850A1 (en)
GB (1) GB2015195A (en)
NL (1) NL7901041A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277722A (en) * 1978-02-15 1981-07-07 Tektronix, Inc. Cathode ray tube having low voltage focus and dynamic correction
JPH0719541B2 (en) * 1985-04-30 1995-03-06 株式会社日立製作所 In-line color picture tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE430157A (en) *
GB495707A (en) * 1937-04-17 1938-11-17 Frederick Hermes Nicoll Improvements in or relating to focussing systems for use in electric discharge tubes
FR2166165A1 (en) * 1971-12-30 1973-08-10 Hitachi Ltd
FR2201536A1 (en) * 1972-09-26 1974-04-26 Thomson Csf

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252441A (en) * 1937-04-26 1941-08-12 Loewe Opta Gmbh Sharp-edge deflection
GB505751A (en) * 1937-09-13 1939-05-15 Frederick Hermes Nicoll Improvements in or relating to cathode ray tubes
US3023336A (en) * 1957-10-25 1962-02-27 Tektronix Inc Cathode ray tube having post acceleration
NL253491A (en) * 1959-07-07
DE1439720B2 (en) * 1964-08-27 1976-04-08 Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm CATHODE TUBE WITH DEFLECTORS
JPS4811664B1 (en) * 1965-04-26 1973-04-14
GB1204314A (en) * 1966-09-21 1970-09-03 Atomic Energy Authority Uk Improvements in or relating to nuclear reactors
US3622836A (en) * 1968-03-25 1971-11-23 Eastman Kodak Co Deflection amplifier with dynamic focus control
JPS5743972B1 (en) * 1971-02-05 1982-09-18
BE785749A (en) * 1971-07-02 1973-01-02 Philips Nv TELEVISION CAMERA TUBE (VIDICON) IN WHICH THE ADVERSE INFLUENCE OF THE RETURN BEAM IS COUNTERLED
JPS5543660Y2 (en) * 1972-04-12 1980-10-14

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE430157A (en) *
GB495707A (en) * 1937-04-17 1938-11-17 Frederick Hermes Nicoll Improvements in or relating to focussing systems for use in electric discharge tubes
FR2166165A1 (en) * 1971-12-30 1973-08-10 Hitachi Ltd
FR2201536A1 (en) * 1972-09-26 1974-04-26 Thomson Csf

Also Published As

Publication number Publication date
JPS6238822B2 (en) 1987-08-19
CA1132649A (en) 1982-09-28
DE2905479C2 (en) 1984-12-13
DE2905479A1 (en) 1979-08-16
FR2417850B1 (en) 1981-10-09
GB2015195A (en) 1979-09-05
JPS54122085A (en) 1979-09-21
NL7901041A (en) 1979-08-17

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Legal Events

Date Code Title Description
ST Notification of lapse