GB948875A - Electron beam source - Google Patents

Electron beam source

Info

Publication number
GB948875A
GB948875A GB348662A GB348662A GB948875A GB 948875 A GB948875 A GB 948875A GB 348662 A GB348662 A GB 348662A GB 348662 A GB348662 A GB 348662A GB 948875 A GB948875 A GB 948875A
Authority
GB
United Kingdom
Prior art keywords
electron beam
source
cathode
varied
beam source
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
GB348662A
Inventor
Albrecht Engel
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to GB348662A priority Critical patent/GB948875A/en
Publication of GB948875A publication Critical patent/GB948875A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • 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
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation

Landscapes

  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

948,875. Remote control of cathode ray tubes by photo-resistive elements. SIEMENS & HALSKE A G. Jan. 30,1962, No. 3486/62. Heading G1A. Also in Division H4] The invention relates to an electron beam source having a cathode and a control electrode, the electron beam from which is controlled by a remote beam of radiation impinging on a photoresistive element, so connected in the supply to the cathode of the electron beam source as to vary the positive potential of the cathode with respect to the potential of the control electrode of the electron beam source. As shown, the positive potential of a cathode K of an electron beam source, with respect to a control electrode S is varied by the change in resistance of a photoresistive element W1 such as a cadmium sulphide resistor, when the intensity of a radiation beam b impinging on the element W1 is varied. The beam b which originates from a source L may be varied by a potentiometer W2 connected across a voltage UL, by grey filters F or other colour filters, or by a continuously adjustable screen B. These measures for varying the intensity or colour of the beam b may be used in combination as shown. The photoresistive element W1 may comprise a single element or a plurality of elements in series, in which case the elements may be controlled by a single radiation source or each may be provided with its own source.
GB348662A 1962-01-30 1962-01-30 Electron beam source Expired GB948875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB348662A GB948875A (en) 1962-01-30 1962-01-30 Electron beam source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB348662A GB948875A (en) 1962-01-30 1962-01-30 Electron beam source

Publications (1)

Publication Number Publication Date
GB948875A true GB948875A (en) 1964-02-05

Family

ID=9759240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB348662A Expired GB948875A (en) 1962-01-30 1962-01-30 Electron beam source

Country Status (1)

Country Link
GB (1) GB948875A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0485266A1 (en) * 1990-11-09 1992-05-13 Thomson Tubes Electroniques Electron gun modulated by optoelectronic switching

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0485266A1 (en) * 1990-11-09 1992-05-13 Thomson Tubes Electroniques Electron gun modulated by optoelectronic switching
FR2669145A1 (en) * 1990-11-09 1992-05-15 Thomson Tubes Electroniques ELECTRON CANON MODULE BY OPTOELECTRONIC SWITCHING.
US5313138A (en) * 1990-11-09 1994-05-17 Thomson Tubes Electroniques Electron gun modulated by optoelectronic switching

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