GB948875A - Electron beam source - Google Patents
Electron beam sourceInfo
- 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
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.
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)
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 |
-
1962
- 1962-01-30 GB GB348662A patent/GB948875A/en not_active Expired
Cited By (3)
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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