GB684080A - Improvements in or relating to electron discharge tube apparatus - Google Patents
Improvements in or relating to electron discharge tube apparatusInfo
- Publication number
- GB684080A GB684080A GB21747/51A GB2174751A GB684080A GB 684080 A GB684080 A GB 684080A GB 21747/51 A GB21747/51 A GB 21747/51A GB 2174751 A GB2174751 A GB 2174751A GB 684080 A GB684080 A GB 684080A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- image
- electron image
- sept
- focused
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000005672 electromagnetic field Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
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
- H01J29/64—Magnetic lenses
- H01J29/66—Magnetic lenses using electromagnetic means only
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
684,080. Electron image tubes. FERNSEH GES. Sept. 17, 1951 [Sept. 18, 1950], No. 21747/51. Class 39(i) The electron image from a photo-cathode is focused by an electromagnetic field which is normal to the cathode surface at the plane of intersection and has an intensity which increases from the centre to the effective edge of the cathode by at least 25 per cent to eliminate distortion of the projected image. The electron image from the photo-cathode 4, Fig. 1, of an inconoscope is focused on to the storage electrode 5 by an electrostatic lens, formed by a potential of 800 volts between the cathode and an anode in the form of a silver coating on a glass cylinder within the tube, and a coil 7 housed within the iron casing 6. The increased magnetic intensity at the cathode edge is obtained by a pole piece 8 which may be provided with an auxiliary winding 10, Fig. 4, a collar 9 and a stepped or conical aperture, the diameter of which is about three times the thickness of the pole piece and touches or just clears the corners of the image. The invention may be applied to image intensifiers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE296816X | 1950-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB684080A true GB684080A (en) | 1952-12-10 |
Family
ID=6090498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21747/51A Expired GB684080A (en) | 1950-09-18 | 1951-09-17 | Improvements in or relating to electron discharge tube apparatus |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE505894A (en) |
| CH (1) | CH296816A (en) |
| FR (1) | FR1042121A (en) |
| GB (1) | GB684080A (en) |
| NL (1) | NL89637C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1120035B (en) * | 1958-02-18 | 1961-12-21 | Optische Ind Iade Oude Delftia | Electron-optical imaging device |
-
0
- NL NL89637D patent/NL89637C/xx active
- BE BE505894D patent/BE505894A/xx unknown
-
1951
- 1951-09-04 CH CH296816D patent/CH296816A/en unknown
- 1951-09-12 FR FR1042121D patent/FR1042121A/en not_active Expired
- 1951-09-17 GB GB21747/51A patent/GB684080A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE505894A (en) | |
| NL89637C (en) | |
| CH296816A (en) | 1954-02-28 |
| FR1042121A (en) | 1953-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB644327A (en) | Projection cathode ray tubes | |
| GB934661A (en) | Improvements in and relating to cathode ray tubes | |
| US2348853A (en) | Cathode ray tube | |
| GB761008A (en) | Improvements in or relating to cathode ray tubes | |
| GB828224A (en) | High-compression beam generating system for velocity-modulated tubes | |
| GB684080A (en) | Improvements in or relating to electron discharge tube apparatus | |
| ES487233A1 (en) | Magnetic electron lens for cathode-ray tube. | |
| US2203734A (en) | Electron lens | |
| US2248558A (en) | Television tube | |
| GB728900A (en) | Improvements in or relating to electron gun structures for use in cathode ray tubes | |
| GB655966A (en) | Improvements in or relating to electrostatic electron lens systems | |
| GB442724A (en) | Braun tube | |
| GB714718A (en) | Improvements in or relating to cathode-ray apparatus | |
| GB860557A (en) | Improvements in or relating to electron beam discharge apparatus | |
| GB605572A (en) | Improvements in or relating to circuit arrangements embodying cathode ray tubes | |
| GB551665A (en) | Improvements in cathode ray tubes | |
| GB548147A (en) | Improvements in or relating to cathode ray tubes | |
| GB446635A (en) | Braun tube, more partieularly for television purposes | |
| GB451574A (en) | Improvements in or relating to cathode ray tubes, preferably for television purposes | |
| GB442666A (en) | Improvements in or relating to television | |
| GB507414A (en) | Improvements in television or like transmitting cathode-ray tubes | |
| GB748945A (en) | Improvements in or relating to electron discharge tubes | |
| GB481549A (en) | Cathode ray discharge devices | |
| GB744127A (en) | Improvements relating to circuit arrangements embodying cathode ray tubes | |
| GB830212A (en) | Improvements in or relating to electron discharge devices |