DE919896C - Arrangement for storing electrical charges over long periods of time - Google Patents
Arrangement for storing electrical charges over long periods of timeInfo
- Publication number
- DE919896C DE919896C DEF4644D DEF0004644D DE919896C DE 919896 C DE919896 C DE 919896C DE F4644 D DEF4644 D DE F4644D DE F0004644 D DEF0004644 D DE F0004644D DE 919896 C DE919896 C DE 919896C
- Authority
- DE
- Germany
- Prior art keywords
- time
- arrangement
- long periods
- over long
- storing electrical
- 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
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 206010070834 Sensitisation Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 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
- H01J29/02—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)
Description
Anordnung zum Speichern von elektrischen Ladungen über lange Zeiträume In der Elektronentechnik werden bisweilen Röhren benötigt, mit denen eine bestimmte Impulsfolge, z. B. ein Fernsehbild, für längere Zeit aufgespeichert werden kann. Bei den bekannten für Fernsehübertragung verwendeten Bildspeicherröhren bedient :man sich zur Speicherung der durch Bestrahlung einer Fotokathode erhaltenen Elektronerrdichteve-rteilung einer Speicherelektrode, die im allgemeinen aus einer Gli:mmerplatte besteht, die auf der einen Seite mit einem Metallbelag versehen und auf der anderen Seite mit fotoempfindlichen oder sekundäremissionsempfindlichen voneinander isolierten Partikeln' bedeckt ist. Wenn nun auf der Mosaikseite der Speicherelektrode ein elektrisches Ladungsbild erzeugt wird, so hält sich dieses, falls keine weiteren Elektronen oder Ladungen auf die Speicherelektroden gelangen, nur für wenige Sekunden oder eventuell auch noch Minuten; danach gehen die Konturen des Bildes mehr und mehr durch die Querleitfä'higkeit der Mosaikelektrode und auch durch Verluste in dem Isoliermaterial verloren. Die Dicke der Glimmerschicht beträgt bei Fernsehröhren etwa 15 bis 2o ,u. Es wurde versucht, die Speicherdauer durch Verwendung dünnerer Glimmersöhichten zu erhöhen, jedoch führte dieser Weg nicht zum Ziel, da technische Schwierigkeiten der Spaltung extrem dünner und gleichmäßiger Glimmerfolien bestehen.Arrangement for storing electrical charges over long periods of time In electronics technology, tubes are sometimes required with which a certain Pulse train, e.g. B. a television picture can be stored for a long time. Served in the known image storage tubes used for television transmission : you can save the electron density distribution obtained by irradiating a photocathode a storage electrode, which generally consists of a gli: mmerplatte, the on one side with a metal coating and on the other side with photosensitive or secondary emission-sensitive particles isolated from one another ' is covered. If now on the mosaic side of the storage electrode there is an electrical Charge image is generated, this is retained if there are no more electrons or Charges get onto the storage electrodes, only for a few seconds or possibly also minutes; after that the contours of the picture go more and more through the Querleitfä'higkeit the mosaic electrode and also through losses in the insulating material lost. The thickness of the mica layer is about 15 to 20 in television tubes , u. An attempt was made to reduce the storage time by using thinner layers of mica to increase, however, this path did not lead to the goal because of technical difficulties consist of splitting extremely thin and even mica foils.
Die erfindungsgemäße Anordnung zum Speichern von elektrischen Ladungen über lange Zeiträume, wobei die Ladungen durch auftreffende Elektronen auf eine Speicherelektrode aufgebracht und z. B. .durch einen abtastenden Kathodenstrahl ausgewertet werden, besitzt das besondere Merkmal, daß die Speicherelektrode aus einer Metallplatte mäteinem .dünnen hochisolierenden Überzug besteht, der durch Aufbringen einer Alkalimetallschicht sensibilisiert ist. Vorteilhaft besteht der Überzug aus einer Alumi.niiumoxydhaut auf Aluminium oder aus einer aufgedampften Quarzschicht.The arrangement according to the invention for storing electrical charges over long periods of time, the charges being transferred to a Storage electrode applied and z. B. .by a scanning cathode ray are evaluated, has the special feature, that the storage electrode consists of a metal plate with a thin, highly insulating coating that passes through Applying an alkali metal layer is sensitized. There is an advantage Coating of an aluminum oxide skin on aluminum or a vapor-deposited one Quartz layer.
Schichten der oben beschriebenen Art können leicht in :der gewünschten Dicke hergestellt werden. Durch Aufbringen der Sensibillisierungsschicht aus Alkalimetall, die natürlich keine nennenswerte Querleitfähigkeit besitzen darf, wird die Speicherfähigkeit der Elektrode beträchtlich erhöht. Dies kann dadurch erklärt werden, daß die Inseln aus Alkalimetall .durch ihre hohe Sekundäremn@ssion eine hohe Aufladung erhalten.Layers of the type described above can easily be converted into: the desired Thickness can be made. By applying the sensitization layer made of alkali metal, which of course must not have any significant transverse conductivity, becomes the storage capacity of the electrode is increased considerably. This can be explained by the fact that the islands made of alkali metal. due to their high secondary emn @ sion a high charge.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF4644D DE919896C (en) | 1942-03-24 | 1942-03-24 | Arrangement for storing electrical charges over long periods of time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF4644D DE919896C (en) | 1942-03-24 | 1942-03-24 | Arrangement for storing electrical charges over long periods of time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE919896C true DE919896C (en) | 1954-11-08 |
Family
ID=7084281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEF4644D Expired DE919896C (en) | 1942-03-24 | 1942-03-24 | Arrangement for storing electrical charges over long periods of time |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE919896C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB406353A (en) * | 1932-08-25 | 1934-02-26 | Emi Ltd | Improvements in or relating to cathode ray tubes and the like |
| FR810432A (en) * | 1935-09-06 | 1937-03-22 | Rca Corp | Improvements to electric shock devices |
| AT152240B (en) * | 1935-07-01 | 1938-01-10 | Farnsworth Television Inc | Cathode ray tube television. |
| US2141059A (en) * | 1923-12-29 | 1938-12-20 | Westinghouse Electric & Mfg Co | Television system |
| CH202381A (en) * | 1937-03-31 | 1939-01-15 | Lorenz C Ag | Process for the manufacture of the Braunschweig tube screen for image scanning. |
-
1942
- 1942-03-24 DE DEF4644D patent/DE919896C/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2141059A (en) * | 1923-12-29 | 1938-12-20 | Westinghouse Electric & Mfg Co | Television system |
| GB406353A (en) * | 1932-08-25 | 1934-02-26 | Emi Ltd | Improvements in or relating to cathode ray tubes and the like |
| AT152240B (en) * | 1935-07-01 | 1938-01-10 | Farnsworth Television Inc | Cathode ray tube television. |
| FR810432A (en) * | 1935-09-06 | 1937-03-22 | Rca Corp | Improvements to electric shock devices |
| CH202381A (en) * | 1937-03-31 | 1939-01-15 | Lorenz C Ag | Process for the manufacture of the Braunschweig tube screen for image scanning. |
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