http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1028219-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3492a7406879265b1f567f37d98dbbaf |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J31-38 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J31-38 |
| filingDate | 1963-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1028219-A |
| titleOfInvention | Image pick-up tube |
| abstract | 1,028,219. Television pick-up tubes. WESTINGHOUSE ELECTRIC CORPORATION. May 3, 1963 [May 31, 1962], No. 17619/63. Heading H1D. In a pick-up tube in which at least a portion of the scanning beam is repelled by charges stored on a photo-conductive target, the returned beam is connected by means arranged so that electrons emanating from target areas other than that being scanned are blocked from the collecting means. As shown, the returned beam i r impinges on a first dynode 47 of a multiplier 50 arranged between electron gun 15 and deflection plates 19-21, an apertured electrode 46 being arranged in front of dynode 47 to selectively pass only those electrons emanating from the target element being scanned. The tube face-plate 13 may be of sapphire, calcium fluoride or barium fluoride and the target comprises a glass or aluminium oxide film 31 supporting a transparent conductive layer 32 and a photo-conductive layer 33 of antimony trisulphide, arsenic trisulphide or arsenic triselenide. In the absence of radiation, the target resistance is relatively low, and a dark current flows thereacross, which is supplied by a flood gun 40, or a second scanning beam, operated at a potential such that secondary emission from the target increases with voltage difference, so that the charge pattern on the target is enhanced rather than erased by the flood electrons. |
| priorityDate | 1962-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.