GB900351A - Improvements relating to electron discharge devices - Google Patents

Improvements relating to electron discharge devices

Info

Publication number
GB900351A
GB900351A GB3602459A GB3602459A GB900351A GB 900351 A GB900351 A GB 900351A GB 3602459 A GB3602459 A GB 3602459A GB 3602459 A GB3602459 A GB 3602459A GB 900351 A GB900351 A GB 900351A
Authority
GB
United Kingdom
Prior art keywords
target
electrodes
electron discharge
electron
oct
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
GB3602459A
Inventor
Michael Edward Haine
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3602459A priority Critical patent/GB900351A/en
Priority to FR841827A priority patent/FR1270991A/en
Publication of GB900351A publication Critical patent/GB900351A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen

Landscapes

  • Dot-Matrix Printers And Others (AREA)

Abstract

900,351. Cathode-ray tubes. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 12, 1960 [Oct. 23, 1959], No. 36024/59. Class 39 (1). An electron discharge device comprises an electron gun 1, a target 9, scanning means 3, 4, and parallel, apertured-plate electrodes 5, 7 forming with the target an electron lens. The positions of the electrodes relative to the target and the potentials applied to the electrodes and target are such that the principal focus of the lens is located at the effective centre of deflection of the beam, whereby the beam impinges normally on the target, and the beam is focused on the target. Preferably, electrode 7 is at a potential intermediate those of electrode 5, e.g. 500 volts, and target 9, e.g. ground or cathode potential, so that the beam impinges on the target with a low velocity. The target may comprise a photo-conductive or photo-emissive material.
GB3602459A 1959-10-23 1959-10-23 Improvements relating to electron discharge devices Expired GB900351A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3602459A GB900351A (en) 1959-10-23 1959-10-23 Improvements relating to electron discharge devices
FR841827A FR1270991A (en) 1959-10-23 1960-10-21 Improvements to electronic tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3602459A GB900351A (en) 1959-10-23 1959-10-23 Improvements relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB900351A true GB900351A (en) 1962-07-04

Family

ID=10384121

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3602459A Expired GB900351A (en) 1959-10-23 1959-10-23 Improvements relating to electron discharge devices

Country Status (1)

Country Link
GB (1) GB900351A (en)

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