GB907623A - Improvements relating to electronic apparatus for focussing a beam of electrons - Google Patents
Improvements relating to electronic apparatus for focussing a beam of electronsInfo
- Publication number
- GB907623A GB907623A GB3319659A GB3319659A GB907623A GB 907623 A GB907623 A GB 907623A GB 3319659 A GB3319659 A GB 3319659A GB 3319659 A GB3319659 A GB 3319659A GB 907623 A GB907623 A GB 907623A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plane
- lenses
- lens
- electrons
- diverge
- 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
- H01J29/64—Magnetic lenses
- H01J29/66—Magnetic lenses using electromagnetic means only
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microwave Tubes (AREA)
Abstract
907,623. Electron lenses. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 28, 1960 [Sept. 30, 1959], No. 33196/59. Drawings to Specification. Class 39 (1). A magnetic electron lens system for focusing a beam of electrons into a flat strip, e.g. for interaction with a planar microwave structure, includes two transverse-field magnetic lenses, the first lens tending to converge the beam in the y-plane and to diverge it in the x-plane and the second lens tending to diverge the beam in the y-plane and to converge it in the x-plane, the relative strengths and spacing of the two lenses being so adjusted that the beam finally emerges parallel to the longitudinal axis. Each lens may be in the form of a U-shaped electro- or permanent magnet with slanted pole-faces to produce a curved field. The fields of the two lenses are in opposite directions, thus deflecting the beam in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3319659A GB907623A (en) | 1959-09-30 | 1959-09-30 | Improvements relating to electronic apparatus for focussing a beam of electrons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3319659A GB907623A (en) | 1959-09-30 | 1959-09-30 | Improvements relating to electronic apparatus for focussing a beam of electrons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB907623A true GB907623A (en) | 1962-10-10 |
Family
ID=10349823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3319659A Expired GB907623A (en) | 1959-09-30 | 1959-09-30 | Improvements relating to electronic apparatus for focussing a beam of electrons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB907623A (en) |
-
1959
- 1959-09-30 GB GB3319659A patent/GB907623A/en not_active Expired
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