GB472162A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB472162A GB472162A GB134836A GB134836A GB472162A GB 472162 A GB472162 A GB 472162A GB 134836 A GB134836 A GB 134836A GB 134836 A GB134836 A GB 134836A GB 472162 A GB472162 A GB 472162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- mosaic
- electron
- scanned
- secondary emission
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 230000002159 abnormal effect Effects 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 230000003321 amplification Effects 0.000 abstract 1
- 229910052792 caesium Inorganic materials 0.000 abstract 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 239000002052 molecular layer Substances 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 239000010409 thin film Substances 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
- H01J29/02—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
- H01J29/38—Photoelectric screens; Charge-storage screens not using charge storage, e.g. photo-emissive screen, extended cathode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/26—Image pick-up tubes having an input of visible light and electric output
- H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
- H01J31/30—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at anode potential, e.g. iconoscope
- H01J31/32—Tubes with image amplification section, e.g. image-iconoscope, supericonoscope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/26—Image pick-up tubes having an input of visible light and electric output
- H01J31/42—Image pick-up tubes having an input of visible light and electric output with image screen generating a composite electron beam which is deflected as a whole past a stationary probe to simulate a scanning effect, e.g. Farnsworth pick-up tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/02—Details
- H01J40/04—Electrodes
- H01J40/06—Photo-emissive cathodes
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
472,162. Cathode-ray tubes; electron multipliers. LUBSZYNSKI, H. G. Jan. 15, 1936, No. 1348. [Class 39 (i)] In a television or like system an electron discharge tube has a screen 3 which when scanned by an electron beam from a gun 7 gives abnormal secondary emission ; an object is optically focused on the screen, the coating of which is such that the secondary emission is inhibited a varying degree directly according to the light intensity. The secondary electrons are accelerated and focused on to a two-sided mosaic 5 to give an electron image corresponding to the object, this mosaic screen being scanned by a light beam or cathode-ray 6a to bring the elements of the mosaic to a datum potential and thereby give a television signal. The coating on the screen 3 is formed by first applying to the wall of the tube 1 a transparent layer of aluminium : on the surface of this layer a thin film of aluminium oxide is formed on which is deposited a mono-molecular layer of caesium this being subsequently oxidized. In place of the mosaic screen, a fluorescent screen may be used, the device then acting as an image intensifier; an infra-red ray or X-rays may be used to modify the secondary emission from the screen 3 and a light picture may be obtained on the fluorescent screen. The object may be focused optically on the same side of the screen 3 as that on which it is scanned. The mosaic screen also may receive the electron image and be scanned on the same side. The screen 3 and mosaic 5 may be at an angle to each other, and amplification of the secondary emission by electron multiplication may be effected by means as described in Specification 457,493. Specification 456,728 also is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US120771A US2199438A (en) | 1936-01-15 | 1937-01-15 | Electron discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2001839A GB531828A (en) | 1939-07-10 | 1939-07-10 | Improvements in or relating to electron discharge devices for use in television and like systems and electrodes therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB472162A true GB472162A (en) | 1937-09-15 |
Family
ID=10138981
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB134836A Expired GB472162A (en) | 1936-01-15 | 1936-01-15 | Improvements in or relating to electron discharge devices |
| GB2001839A Expired GB531828A (en) | 1936-01-15 | 1939-07-10 | Improvements in or relating to electron discharge devices for use in television and like systems and electrodes therefor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2001839A Expired GB531828A (en) | 1936-01-15 | 1939-07-10 | Improvements in or relating to electron discharge devices for use in television and like systems and electrodes therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB472162A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1031343B (en) * | 1952-05-27 | 1958-06-04 | Csf | TV adapter tube |
-
1936
- 1936-01-15 GB GB134836A patent/GB472162A/en not_active Expired
-
1939
- 1939-07-10 GB GB2001839A patent/GB531828A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1031343B (en) * | 1952-05-27 | 1958-06-04 | Csf | TV adapter tube |
Also Published As
| Publication number | Publication date |
|---|---|
| GB531828A (en) | 1941-01-13 |
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