GB679609A - Improvements in or relating to target electrodes for use in television camera tubes and storage tubes - Google Patents
Improvements in or relating to target electrodes for use in television camera tubes and storage tubesInfo
- Publication number
- GB679609A GB679609A GB11141/51A GB1114151A GB679609A GB 679609 A GB679609 A GB 679609A GB 11141/51 A GB11141/51 A GB 11141/51A GB 1114151 A GB1114151 A GB 1114151A GB 679609 A GB679609 A GB 679609A
- Authority
- GB
- United Kingdom
- Prior art keywords
- insulating elements
- tubes
- television camera
- discharged
- layer
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/36—Photoelectric screens; Charge-storage screens
- H01J29/39—Charge-storage screens
- H01J29/41—Charge-storage screens using secondary emission, e.g. for supericonoscope
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
679,609. Cathode-ray tubes. COMPAGNIE POUR LA FABRICATION DES COMPTEURS ET MATERIEL D'USINES A GAZ. May 11, 1951 [May 12, 1950], No. 11141/51. Class 39 (i). A target electrode for use in a television camera tube or in a storage tube comprises a conductive layer 1 and a multiplicity of small insulating elements 2 disposed over a surface of the layer with their exposed surfaces substantially coplanar with the layer surface; the insulating elements are preferably of alumina and may be covered with photo-sensitive material. The insulating elements may be charged positively by the optical or electron image and raised to a higher potential by a high velocity scanning beam, the supporting plate being negative with respect to the anode; they are discharged by secondary electrons emitted from the metallic parts and in addition the target may be uniformly flooded with slow electrons or the insulating material may be made slightly conducting. Alternatively, the insulating elements may be charged negatively by accelerating an electron image on to them with a high voltage (about 10 kv.) and discharged by a lower velocity scanning beam (about 1000 volts).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR679609X | 1950-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB679609A true GB679609A (en) | 1952-09-17 |
Family
ID=9021772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11141/51A Expired GB679609A (en) | 1950-05-12 | 1951-05-11 | Improvements in or relating to target electrodes for use in television camera tubes and storage tubes |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE914385C (en) |
| GB (1) | GB679609A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE448569A (en) * | 1941-12-31 | |||
| GB611713A (en) * | 1943-05-13 | 1948-11-03 | Marconi Wireless Telegraph Co | Improvements in television transmitters |
-
1951
- 1951-04-26 DE DEC4112A patent/DE914385C/en not_active Expired
- 1951-05-11 GB GB11141/51A patent/GB679609A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE914385C (en) | 1954-07-01 |
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