GB1340092A - Channel plate image intensifier systems - Google Patents

Channel plate image intensifier systems

Info

Publication number
GB1340092A
GB1340092A GB1340092DA GB1340092A GB 1340092 A GB1340092 A GB 1340092A GB 1340092D A GB1340092D A GB 1340092DA GB 1340092 A GB1340092 A GB 1340092A
Authority
GB
United Kingdom
Prior art keywords
phosphor
voltage
channel plate
derived
image intensifier
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
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB1340092A publication Critical patent/GB1340092A/en
Expired legal-status Critical Current

Links

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
    • H01J29/98—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

1340092 Automatic control of image intensifiers STANDARD TELEPHONES & CABLES Ltd 4 May 1972 [10 May 1971] 13907/71 Heading G3R In a channel plate image intensifier, including a photocathode, a channel plate and a phosphor, the voltage across the channel plate is controlled by a signal derived at least in part from the current in the phosphor. In the embodiment shown, a control signal, proportional to the current in phosphor 23 of image intensifier 20, is derived from the voltage across resistor 28 by amplifier 29, and compared with an adjustable reference from amplifier 31 by differential amplifier 30, to provide a variable bias to transistor 33. Using light emitting diode 27, this bias changes the resistance of vacuum photodiode 26 and thus the voltage across channel plate 22, which is derived from a voltage multiplier 24, fed from a battery through oscillator 25, the multiplier providing a fixed voltage between the intensifier photocathode 21 and phosphor 23. In other embodiments, the voltage multiplier may be replaced by fixed and variable power supplies, the latter being controlled directly from the differential amplifier, Fig.1, (not shown), and the control signal, derived from the product of the phosphor current and the voltage between the channel plate and the phosphor, may be used to control the power dissipated in the phosphor, Fig. 2.
GB1340092D 1971-05-10 1971-05-10 Channel plate image intensifier systems Expired GB1340092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1390771 1971-05-10

Publications (1)

Publication Number Publication Date
GB1340092A true GB1340092A (en) 1973-12-05

Family

ID=10031555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1340092D Expired GB1340092A (en) 1971-05-10 1971-05-10 Channel plate image intensifier systems

Country Status (1)

Country Link
GB (1) GB1340092A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033574A1 (en) * 1980-02-04 1981-08-12 Philips Electronics Uk Limited Electrical power supply arrangement for image intensifier tubes and combination thereof with an image intensifier tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033574A1 (en) * 1980-02-04 1981-08-12 Philips Electronics Uk Limited Electrical power supply arrangement for image intensifier tubes and combination thereof with an image intensifier tube
US4412128A (en) 1980-02-04 1983-10-25 U.S. Philips Corporation Automatic brightness control circuit for a high voltage electrical power supply

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee