GB490391A - Improvements in or relating to television and like systems - Google Patents

Improvements in or relating to television and like systems

Info

Publication number
GB490391A
GB490391A GB4504/37A GB450437A GB490391A GB 490391 A GB490391 A GB 490391A GB 4504/37 A GB4504/37 A GB 4504/37A GB 450437 A GB450437 A GB 450437A GB 490391 A GB490391 A GB 490391A
Authority
GB
United Kingdom
Prior art keywords
cathode
electrons
mosaic
photo
feb
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
Application number
GB4504/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Fernsehanlagen GmbH
Original Assignee
Fernseh GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fernseh GmbH filed Critical Fernseh GmbH
Publication of GB490391A publication Critical patent/GB490391A/en
Expired legal-status Critical Current

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
    • H01J31/30—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
    • 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
    • H01J29/413—Charge-storage screens using secondary emission, e.g. for supericonoscope for writing and reading of charge pattern on opposite sides of the target, e.g. for superorthicon
    • H01J29/416—Charge-storage screens using secondary emission, e.g. for supericonoscope for writing and reading of charge pattern on opposite sides of the target, e.g. for superorthicon with a matrix of electrical conductors traversing the target

Abstract

490,391. Cathode-ray tubes. FERNSEH AKT.-GES. Feb. 15, 1937, No. 4504. Convention date, Feb. 14, 1936. [Class 39 (i)] A mosaic electrode 5 scanned by a cathode-ray from a gun G to develop picture signals receives an electron image from a photo-electric cathode 2, and the electrons from the cathode 2 are accelerated to the mosaic 5 for a portion only of the scanning cycle to avoid difficulties arising from rapid movements of objects in the picture thrown on to the cathode 2. The photo-electrons are focused by a coil 6, the effect of which can be varied so that part only of the image is reproduced on the electrode 5 to obtain close-up effects. The photo-electrons are accelerated by a grid 4 to such velocity that secondary emission charges the mosaic elements positively, the secondary electrons being collected by the grid 4 to give a potential across an impedance 10 corresponding to the average picture brightness. The mosaic is double-sided as shown and those electrons from the gun G which are not required to neutralize the positive charges on the mosaic elements cause secondary emission to a ring 7 giving negative image signals across a resistance 8. Specification 442,666 is referred to.
GB4504/37A 1936-02-14 1937-02-15 Improvements in or relating to television and like systems Expired GB490391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE490391X 1936-02-14

Publications (1)

Publication Number Publication Date
GB490391A true GB490391A (en) 1938-08-15

Family

ID=6544106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4504/37A Expired GB490391A (en) 1936-02-14 1937-02-15 Improvements in or relating to television and like systems

Country Status (2)

Country Link
FR (1) FR817818A (en)
GB (1) GB490391A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463038A (en) * 1944-07-06 1949-03-01 Rca Corp Direct current insertion circuit
US2465667A (en) * 1945-01-09 1949-03-29 Rca Corp Method of and means for controlling the beam current in television camera tubes
US2534627A (en) * 1946-05-22 1950-12-19 Rca Corp Video amplifier with separate channels for high and low frequencies
US2611820A (en) * 1947-02-18 1952-09-23 Rca Corp Pickup tube beam-interrupting circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463038A (en) * 1944-07-06 1949-03-01 Rca Corp Direct current insertion circuit
US2465667A (en) * 1945-01-09 1949-03-29 Rca Corp Method of and means for controlling the beam current in television camera tubes
US2534627A (en) * 1946-05-22 1950-12-19 Rca Corp Video amplifier with separate channels for high and low frequencies
US2611820A (en) * 1947-02-18 1952-09-23 Rca Corp Pickup tube beam-interrupting circuit

Also Published As

Publication number Publication date
FR817818A (en) 1937-09-11

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