GB1177319A - Cathode-Ray Tube Arrangement - Google Patents

Cathode-Ray Tube Arrangement

Info

Publication number
GB1177319A
GB1177319A GB60381/68A GB6038168A GB1177319A GB 1177319 A GB1177319 A GB 1177319A GB 60381/68 A GB60381/68 A GB 60381/68A GB 6038168 A GB6038168 A GB 6038168A GB 1177319 A GB1177319 A GB 1177319A
Authority
GB
United Kingdom
Prior art keywords
gun
grid
opening
lens
cathode
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.)
Expired
Application number
GB60381/68A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1177319A publication Critical patent/GB1177319A/en
Expired 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
    • H01J29/626—Electrostatic lenses producing fields exhibiting periodic axial symmetry, e.g. multipolar fields
    • H01J29/628—Electrostatic lenses producing fields exhibiting periodic axial symmetry, e.g. multipolar fields co-operating with or closely associated to an electron gun
    • 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
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof

Landscapes

  • Details Of Television Scanning (AREA)
  • Particle Accelerators (AREA)

Abstract

1,177,319. Cathode-ray tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 19 Dec., 1968 [22 Dec., 1967], No. 60381/68. Heading H1D. In a cathode-ray tube with a deflection amplifying quadrupolar lens 5, Fig. 1, the astigmatic beam focusing effect of the quadrupolar field is compensated for by making the beam astigmatic before it enters the quadrupolar lens by means of a grin system 2 in which the first grid electrode has an opening which is non-rotationallysymmetrical, e.g. elliptical. The focusing lens 3 is rotationally-symmetrical. The gun 2 may be a triode gun or a tetrode gun, Fig. 4, in which the first grid 112 has an elliptical opening 128, the second grid 125 has a circular opening 129 and the accelerating electrode 113 is constituted by a spout-shaped portion of electrode 114 which forms with electrodes 115 and 116 the rotationally-symmetrical focusing lens 103. Due to the non-rotationally-symmetrical opening in the first grid the electrons appear to originate from two virtual, elongated crossovers and by matching the gun with the quadrupolar lens a circular beam spot is obtained on the target of the tube.
GB60381/68A 1967-12-22 1968-12-19 Cathode-Ray Tube Arrangement Expired GB1177319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6717636A NL6717636A (en) 1967-12-22 1967-12-22

Publications (1)

Publication Number Publication Date
GB1177319A true GB1177319A (en) 1970-01-07

Family

ID=19802089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB60381/68A Expired GB1177319A (en) 1967-12-22 1968-12-19 Cathode-Ray Tube Arrangement

Country Status (6)

Country Link
US (1) US3497763A (en)
BE (1) BE725861A (en)
DE (1) DE1812024A1 (en)
FR (1) FR1596367A (en)
GB (1) GB1177319A (en)
NL (1) NL6717636A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180966B (en) * 1959-11-10 1964-11-05 Robert Thomas Lewis Frame for films, especially slides
DE1284656B (en) * 1964-03-03 1968-12-05 Philipp Hans Juergen Change frame for slides
JPS4819097B1 (en) * 1969-07-23 1973-06-11
US4130775A (en) * 1977-01-17 1978-12-19 Tektronix, Inc. Charge image charge transfer cathode ray tube having a scan expansion electron lens system and collimation electrode means
NL178374C (en) * 1977-11-24 1986-03-03 Philips Nv ELECTRON RADIUS TUBE WITH NON-ROTATION SYMETRIC ELECTRON LENS BETWEEN FIRST AND SECOND GRID.
NL175002C (en) * 1977-11-24 1984-09-03 Philips Nv CATHODE JET TUBE WITH AT LEAST AN ELECTRON GUN.
US4399388A (en) * 1980-10-16 1983-08-16 Tokyo Shibaura Denki Kabushiki Kaisha Picture tube with an electron gun having non-circular aperture
US4558253A (en) * 1983-04-18 1985-12-10 Rca Corporation Color picture tube having an inline electron gun with asymmetric focusing lens
US4608515A (en) * 1985-04-30 1986-08-26 Rca Corporation Cathode-ray tube having a screen grid with asymmetric beam focusing means and refraction lens means formed therein
FR2705164B1 (en) * 1993-05-10 1995-07-13 Thomson Tubes & Displays Color image tube with electron guns in line with astigmatic lenses.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919381A (en) * 1956-07-25 1959-12-29 Farrand Optical Co Inc Electron lens
NL219031A (en) * 1956-09-07
US2988660A (en) * 1958-07-02 1961-06-13 Gen Dynamics Corp Electro optical system in a cathode ray tube
US3349269A (en) * 1963-11-29 1967-10-24 Stromberg Carlson Corp Astigmatic lens arrangement for cathode ray tubes
US3373310A (en) * 1964-07-17 1968-03-12 E H Res Lab Inc Cathode ray tube selective deflection amplifier using a quadrupole lens of critical length
US3376449A (en) * 1967-01-20 1968-04-02 Ion Physics Corp Electrostatic quadrapole lens assembly with transverse intermediate termination elements of resistive material joining together the quadrapole electrodes for preventing beam aberration

Also Published As

Publication number Publication date
FR1596367A (en) 1970-06-15
BE725861A (en) 1969-06-20
DE1812024A1 (en) 1969-12-04
US3497763A (en) 1970-02-24
NL6717636A (en) 1969-06-24

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