GB863080A - Improvements in or relating to multiple electron beam tubes - Google Patents
Improvements in or relating to multiple electron beam tubesInfo
- Publication number
- GB863080A GB863080A GB2208757A GB2208757A GB863080A GB 863080 A GB863080 A GB 863080A GB 2208757 A GB2208757 A GB 2208757A GB 2208757 A GB2208757 A GB 2208757A GB 863080 A GB863080 A GB 863080A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragms
- beams
- diaphragm
- twenty
- tube
- 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
- 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
- H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field only
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
863,080. Cathode-ray tubes. TELEFUNKEN G.m.b.H. July 12, 1957, No. 22087/57. Class 39(1). A multiple beam tube, e.g. for colour television, has an electrostatic lens comprising three or more diaphragms having beam passing apertures corresponding in number to the number of beams, and different potentials are applied to different diaphragms to focus each of the beams at the target of the tube. A large number of diaphragms, for instance twenty-seven, is used to reduce spherical aberration. Astigmatism may be reduced by making the beam passing apertures non- circular, or by merging the apertures in the middle diaphragms, e.g. the middle seven in the twenty-seven diaphragm arrangement, to form slots, or, Fig. 5, by providing the diaphragms 5 with flanges 17. The beams may diverge, Fig. 6, and the diaphragms may be bent, Fig. 7. The electron guns may be arranged delta fashion or in line. In Fig. 1 the gun anodes 3 are secured to the first diaphragm 5 of the diaphragm system 6. The diaphragms are fixed to the insulating rods 6 by projecting members 14, Fig. 3. Indentations or slots are provided at 15 to allow for thermal expansion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2208757A GB863080A (en) | 1957-07-12 | 1957-07-12 | Improvements in or relating to multiple electron beam tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2208757A GB863080A (en) | 1957-07-12 | 1957-07-12 | Improvements in or relating to multiple electron beam tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB863080A true GB863080A (en) | 1961-03-15 |
Family
ID=10173711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2208757A Expired GB863080A (en) | 1957-07-12 | 1957-07-12 | Improvements in or relating to multiple electron beam tubes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB863080A (en) |
-
1957
- 1957-07-12 GB GB2208757A patent/GB863080A/en not_active Expired
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