GB493007A - Improvements in image dissector - Google Patents
Improvements in image dissectorInfo
- Publication number
- GB493007A GB493007A GB21697/37A GB2169737A GB493007A GB 493007 A GB493007 A GB 493007A GB 21697/37 A GB21697/37 A GB 21697/37A GB 2169737 A GB2169737 A GB 2169737A GB 493007 A GB493007 A GB 493007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- anode
- image
- caesium
- aug
- 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
- 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
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
493,007. Image dissectors. FARNSWORTH TELEVISION, Inc. Aug. 6, 1937, No. 21697. Convention date, Aug. 18, 1936. [Class 39 (i)] In a television system an infra-red image is projected on a thermionically emissive cathode 7 the resultant composite electron image being focused and deflected over a dissector consisting of a collector anode 15 within an apertured, shielding anode 12; the television signal may be obtained by the electrons collected on the anode 15 or this may emit secondaries collected by the shielding anode 12, this secondary emission forming the basis of the signals. As shown an arc 22 projects heat rays through a film 2, the rays being focused by the projector 26 onto the cathode 7 ; this is opaque, formed on the envelope wall and consists of caesium on silver or caesium-silver oxide. The varying density of the picture on the film 2 gives rise to varying heating of the cathode 7. Initial heating of the cathode may be effected by the lamps 27, 29.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US96616A US2216265A (en) | 1936-08-18 | 1936-08-18 | Image dissector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB493007A true GB493007A (en) | 1938-09-30 |
Family
ID=22258231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21697/37A Expired GB493007A (en) | 1936-08-18 | 1937-08-06 | Improvements in image dissector |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2216265A (en) |
| DE (1) | DE731120C (en) |
| GB (1) | GB493007A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2788452A (en) * | 1952-07-29 | 1957-04-09 | Ernest J Sternglass | Thermal image detecting tube |
| US2935624A (en) * | 1955-08-26 | 1960-05-03 | Forman Ralph | Electrostatically-controlled resistance tube |
| US3064210A (en) * | 1957-10-25 | 1962-11-13 | Rca Corp | Harmonic generator |
-
1936
- 1936-08-18 US US96616A patent/US2216265A/en not_active Expired - Lifetime
-
1937
- 1937-08-06 GB GB21697/37A patent/GB493007A/en not_active Expired
- 1937-08-19 DE DEF83521D patent/DE731120C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2216265A (en) | 1940-10-01 |
| DE731120C (en) | 1943-02-02 |
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