GB805691A - Improvements in or relating to circuit arrangements embodying electron lenses - Google Patents
Improvements in or relating to circuit arrangements embodying electron lensesInfo
- Publication number
- GB805691A GB805691A GB2200354A GB2200354A GB805691A GB 805691 A GB805691 A GB 805691A GB 2200354 A GB2200354 A GB 2200354A GB 2200354 A GB2200354 A GB 2200354A GB 805691 A GB805691 A GB 805691A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- over
- cross
- lens
- july
- 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
805,691. Electron beam apparatus. DOLDER, K. T., and KLEMPERER, O. E. H. July 26, 1955. [July, 28, 1954], No. 22003/54. Class 39(1). In order to introduce negative spherical aberration at a cross-over formed by an electron lens for the purpose of reducing the effect of positive spherical aberration, the beam current I, the voltage V at the cross-over and the semi-angle of convergence # at which the electron beam crosses over are chosen to satisfy the relationship where I is measured in amperes and # is expressed in radians. As shown where electrons from a cathode 1 are focused by the lens action of grid electrode 2 and accelerating electrode 3 to a first cross-over 6, a second correcting cross-over 7 is formed by the lens action of accelerating electrode 3 and decelerating electrode 4. The lens formed by electrodes 4 and 5 may be purely electrostatic or formed by a combination of electrostatic and magnetic fields. Plane aperature diaphragms may be provided within the electrode 4 and at the end adjacent to electrode 3. An example specifying dimensions and voltages is given and aberration curves of #<SP>2</SP> against back focal distance are shown for various volumes of current and voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2200354A GB805691A (en) | 1954-07-28 | 1954-07-28 | Improvements in or relating to circuit arrangements embodying electron lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2200354A GB805691A (en) | 1954-07-28 | 1954-07-28 | Improvements in or relating to circuit arrangements embodying electron lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB805691A true GB805691A (en) | 1958-12-10 |
Family
ID=10172379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2200354A Expired GB805691A (en) | 1954-07-28 | 1954-07-28 | Improvements in or relating to circuit arrangements embodying electron lenses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB805691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2307593A (en) * | 1995-11-24 | 1997-05-28 | Samsung Display Devices Co Ltd | Electron gun for color cathode ray tube |
-
1954
- 1954-07-28 GB GB2200354A patent/GB805691A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2307593A (en) * | 1995-11-24 | 1997-05-28 | Samsung Display Devices Co Ltd | Electron gun for color cathode ray tube |
| GB2307593B (en) * | 1995-11-24 | 2000-03-08 | Samsung Display Devices Co Ltd | Electron gun for color cathode ray tube |
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