GB743431A - Improvements in or relating to picture and/or picture signal producing electron discharge tubes - Google Patents
Improvements in or relating to picture and/or picture signal producing electron discharge tubesInfo
- Publication number
- GB743431A GB743431A GB14079/53A GB1407953A GB743431A GB 743431 A GB743431 A GB 743431A GB 14079/53 A GB14079/53 A GB 14079/53A GB 1407953 A GB1407953 A GB 1407953A GB 743431 A GB743431 A GB 743431A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrons
- target
- reflected
- potential
- gun
- 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
- H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
- H01J31/34—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 cathode potential, e.g. orthicon
- H01J31/38—Tubes with photoconductive screen, e.g. vidicon
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
743,431. Television pick-up tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. May 19, 1953 [May 27, 1952], No. 14079/53. Class 39 (1). An electron discharge tube comprises a photo-conductive layer with a metallic back-plate at near cathode potential, a permeable decelerating electrode near the target and at a high potential relative to the cathode of the gun and a scanning beam producing secondary electrons and reflected primary electrons at the target to form pictures on a fluorescent screen or develop video signals or both. A very thin metallic back-plate 3, e.g. of platinum or glass supports the photo-conductive layer 4 and the very fine mesh planar grid 10 which lies close to the layer and at a high potential, e.g. 1000 volts, i.e. the potential of a wall coating 2 and the anode 8 of the inclined gun 6, 7, 8. The electron lens 11 is at a lower potential, e.g. 500 volts and its focal plane passes through the centre of deflection C of the gun. Beam electrons reflected from the charge image produced on the target 4 by the image of the object cast by lens 5 which may be of infra-red or ultraviolet radiation, are accelerated and focused through a diaphragm 16 to give a visual image. Alternatively, as in Fig. 2, (not shown), they are focused onto the first element of an electron multiplier, the final electrode of which gives a video output signal. In another modification, the primary electrons reflected at the target pass to a symmetrically placed electron multiplier to give the output signal. Fig. 5 shows an arrangement combining the two systems to provide a visual monitor, the reflected electrons being received by the electrode 12 of the multiplier 13 and the secondary electrons being accelerated along the axis on to the fluorescent screen 16.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1031343X | 1952-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB743431A true GB743431A (en) | 1956-01-18 |
Family
ID=9583101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14079/53A Expired GB743431A (en) | 1952-05-27 | 1953-05-19 | Improvements in or relating to picture and/or picture signal producing electron discharge tubes |
Country Status (5)
Country | Link |
---|---|
US (1) | US2863087A (en) |
CH (1) | CH329950A (en) |
DE (1) | DE1031343B (en) |
FR (1) | FR1057404A (en) |
GB (1) | GB743431A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3123737A (en) * | 1964-03-03 | schneeberger | ||
NL274685A (en) * | 1961-02-10 | |||
GB996331A (en) * | 1962-01-15 | 1965-06-23 | Emi Ltd | Improvements relating to image pick-up devices and circuit arrangements embodying such devices |
US3207843A (en) * | 1962-11-16 | 1965-09-21 | Kollsman Instr Corp | Infrared imaging device using depositable materials |
US3307061A (en) * | 1963-09-16 | 1967-02-28 | Gen Electric | Electrostatic return beam camera tube |
US3505558A (en) * | 1966-09-22 | 1970-04-07 | John E Jacobs | Composite target structure for television,x-ray and ultrasound camera tube |
US3710125A (en) * | 1970-04-29 | 1973-01-09 | Univ Northwestern | Secondary emission enhancer for an x-ray image intensifier |
US3736460A (en) * | 1971-06-28 | 1973-05-29 | Columbia Broadcasting Syst Inc | Off-axis return beam tube |
US3774236A (en) * | 1971-11-29 | 1973-11-20 | Gec Owensboro | Image converter utilizing the combination of an electrostatic deflection field and a magnetic focusing field |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB446661A (en) * | 1934-08-03 | 1936-05-04 | Alan Dower Blumlein | Improvements in or relating to television transmitting systems |
GB472162A (en) * | 1939-07-10 | 1937-09-15 | Hans Gerhard Lubszynski | Improvements in or relating to electron discharge devices |
US2264540A (en) * | 1936-09-10 | 1941-12-02 | Emi Ltd | Cathode-ray tube |
US2288402A (en) * | 1941-01-29 | 1942-06-30 | Rca Corp | Television transmitting tube |
BE475030A (en) * | 1942-08-29 | |||
NL79223C (en) * | 1948-01-29 | |||
US2654853A (en) * | 1949-02-28 | 1953-10-06 | Rca Corp | Photoelectric apparatus |
US2747133A (en) * | 1950-07-05 | 1956-05-22 | Rca Corp | Television pickup tube |
NL94738C (en) * | 1950-12-06 | |||
US2749463A (en) * | 1951-10-24 | 1956-06-05 | Bell Telephone Labor Inc | Solid state television pick-up tube |
-
1952
- 1952-05-27 FR FR1057404D patent/FR1057404A/en not_active Expired
-
1953
- 1953-04-16 CH CH329950D patent/CH329950A/en unknown
- 1953-05-19 GB GB14079/53A patent/GB743431A/en not_active Expired
- 1953-05-19 US US356067A patent/US2863087A/en not_active Expired - Lifetime
- 1953-05-27 DE DEC7635A patent/DE1031343B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1031343B (en) | 1958-06-04 |
CH329950A (en) | 1958-05-15 |
FR1057404A (en) | 1954-03-08 |
US2863087A (en) | 1958-12-02 |
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