GB1129768A - Image intensifying device having a plurality of sections - Google Patents

Image intensifying device having a plurality of sections

Info

Publication number
GB1129768A
GB1129768A GB2701/67A GB270167A GB1129768A GB 1129768 A GB1129768 A GB 1129768A GB 2701/67 A GB2701/67 A GB 2701/67A GB 270167 A GB270167 A GB 270167A GB 1129768 A GB1129768 A GB 1129768A
Authority
GB
United Kingdom
Prior art keywords
screen
cathode
electrons
time
switch
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
GB2701/67A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1129768A publication Critical patent/GB1129768A/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
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/508—Multistage converters

Landscapes

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

Abstract

1,129,768. Image intensifying device. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 18 Jan., 1967 [20 Jan., 1966], No. 2701/67. Heading H4F. [Also in Division H1] An image intensifying tube device comprises a plurality of consecutive, optically coupled sections 2, 3 and 4, each having a photocathode, 2<SP>1</SP>, 3<SP>1</SP> and 4<SP>1</SP> respectively, and a phosphor screen 2<SP>11</SP>, 3<SP>11</SP> and 4<SP>11</SP> respectively. Cathode 21 and screen 4<SP>11</SP> are formed on the ends of the tube, and screen 2<SP>11</SP> and cathode 3<SP>1</SP> are formed on either side of a glass plate. Screen 3<SP>11</SP> and cathode 4<SP>1</SP> have a similar construction. The positive terminal of a 20 kV source is applied to screen 4<SP>11</SP> and to the screen/ cathode pairs 2<SP>11</SP>/3<SP>1</SP> and 3<SP>11</SP>/4<SP>1</SP> via respective current limiting resistors 5 and 6. The negative terminal of the source is connected to cathode 2<SP>1</SP> and to the screen/cathode pairs 2<SP>11</SP>/3<SP>1</SP> and 311/41 via respective thyristor switches 7 and 8, initially open. A light pulse is incedent on the cathode 2<SP>1</SP> from time t 1 to t 2 (see Fig. 2). With switches 7 and 8 open, the 30 kV appears across section 2 and if switch 7 is closed at time t 2 electrons will flow from cathode 2<SP>1</SP> to screen 2<SP>11</SP> for the period indicated at Fig. 2(2). The flow of electrons to screen 211 will cause the screen to brighten up to time t 2 and then decay. Closure of switch 7 transfers the 30 kV across section 3, when from time t 2 to t 3 when switch 8 is closed, the decaying brightness of the screen 211 causes a corresponding decaying flow of electrons from cathode 3<SP>1</SP> to screen 3<SP>11</SP>, as indicated shaded at Fig. 2(3). Integration of the impinging electrons on screen 311 causes it to brighten up to time t 3 and then decay. The closure of switch 8 transfers the 30 kV across section 4 and the decaying flow of electrons from cathode 4<SP>1</SP> shown shaded at Fig. 2(4) is integrated on screen 4<SP>11</SP> to produce a much intensified image. The screens 2<SP>11</SP>, 311 and 4<SP>11</SP> should have increasing retentivity.
GB2701/67A 1966-01-20 1967-01-18 Image intensifying device having a plurality of sections Expired GB1129768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR46568A FR1474019A (en) 1966-01-20 1966-01-20 Multistage Image Amplifier Tube Feeder

Publications (1)

Publication Number Publication Date
GB1129768A true GB1129768A (en) 1968-10-09

Family

ID=8599238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2701/67A Expired GB1129768A (en) 1966-01-20 1967-01-18 Image intensifying device having a plurality of sections

Country Status (4)

Country Link
US (1) US3497699A (en)
FR (1) FR1474019A (en)
GB (1) GB1129768A (en)
NL (1) NL6700686A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492589A1 (en) * 1978-05-30 1982-04-23 English Electric Valve Co Ltd IMAGE ENHANCING DEVICE

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851206A (en) * 1969-06-04 1974-11-26 Hughes Aircraft Co Gain controllable image intensification system
GB1329091A (en) * 1969-11-10 1973-09-05 Emi Ltd Arrangements including image intensifier devices
US3631252A (en) * 1970-03-24 1971-12-28 Us Air Force Image control apparatus utilizing the convolution of phosphors
US3875440A (en) * 1971-11-24 1975-04-01 Electron Physics Ltd Cascade image intensifier tube with independently sealed sections
DE3004351A1 (en) * 1980-02-06 1981-08-13 Siemens AG, 1000 Berlin und 8000 München MULTI-STAGE VACUUM X-RAY IMAGE AMPLIFIER

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919364A (en) * 1955-10-04 1959-12-29 Ibm Photocell with transparent photocathode
US3058002A (en) * 1957-11-29 1962-10-09 Gen Motors Corp Light beam transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492589A1 (en) * 1978-05-30 1982-04-23 English Electric Valve Co Ltd IMAGE ENHANCING DEVICE

Also Published As

Publication number Publication date
US3497699A (en) 1970-02-24
NL6700686A (en) 1967-07-21
FR1474019A (en) 1967-03-24

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