GB745811A - Improvements relating to electron multipliers - Google Patents

Improvements relating to electron multipliers

Info

Publication number
GB745811A
GB745811A GB7006/51A GB700651A GB745811A GB 745811 A GB745811 A GB 745811A GB 7006/51 A GB7006/51 A GB 7006/51A GB 700651 A GB700651 A GB 700651A GB 745811 A GB745811 A GB 745811A
Authority
GB
United Kingdom
Prior art keywords
envelope
cathode
photo
wall
glass
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
GB7006/51A
Inventor
James Dwyer Mcgee
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Publication of GB745811A publication Critical patent/GB745811A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/28—Vessels, e.g. wall of the tube; Windows; Screens; Suppressing undesired discharges or currents

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

745,811. Electron multipliers. ELECTRIC & MUSICAL INDUSTRIES, Ltd. March 17, 1962 [March 27, 1951], No. 7006/51. Class 39 (1). An electron multiplier comprising within an evacuated envelope a photo-electric cathode deposited on the inner wall of the envelope, an electron collector and therebetween a plurality of dynode electrodes which are so arranged that there is substantially no straight line passage for light from the cathode to the collector, has light attenuating means disposed between the photo-cathode and collector in the wall of the envelope wall or around the latter so as substantially to reduce the passage of light undergoing multiple internal reflections in the envelope wall. In the construction shown in Fig. 1 the envelope 1 is formed with a reentrant portion 15, the inner and/or outer surfaces of which are rendered opaque by painting. The re-entrant portion 15 may be of glass of dark colour and extends into the envelope sufficiently to obscure the ends of the glass rods 12 supporting the dynodes 6 from the photocathode 3. The photo-cathode 3 is provided with a contact member 4. Each of the dynodes 6 comprises a box 8 having a plurality of obliquely disposed louvres 10 and a wire mesh 9. In the construction shown in Fig. 2 an annular metal ring which may be of " Kovar " (Registered Trade Mark) is sealed into the wall of the envelope 1 and obscures the ends of the rods 12 from the photo-cathode 3. The metal ring 16 may be connected to the photo-cathode 3 either internally or externally of the envelope. In the construction shown in Fig. 3 part 22 of the envelope wall is formed of a light attenuating glass and a cylindrical shield electrode 17 is supported from the glass rods 12 by eyelets 20 and has a circular aperture 19. The electrode 17 is connected to the photo-cathode 3 by a connecting strip 21. According to the Provisional Specification the material of the photo-cathode 3 deposited on the end wall of the envelope may extend along part of the cylindrical surface of the envelope.
GB7006/51A 1951-03-27 1951-03-27 Improvements relating to electron multipliers Expired GB745811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB299516X 1951-03-27

Publications (1)

Publication Number Publication Date
GB745811A true GB745811A (en) 1956-03-07

Family

ID=10299856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7006/51A Expired GB745811A (en) 1951-03-27 1951-03-27 Improvements relating to electron multipliers

Country Status (5)

Country Link
US (1) US2841728A (en)
CH (1) CH299516A (en)
DE (1) DE1014242B (en)
FR (1) FR1053071A (en)
GB (1) GB745811A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281043B (en) * 1957-07-06 1968-10-24 Emi Ltd Arrangement of louvre-like inclined dynode sheets for electron multiplier tubes
GB2146169A (en) * 1983-05-25 1985-04-11 Philips Nv Photomultiplier tube

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031902B (en) * 1953-11-09 1958-06-12 Siemens Ag Albis Image converter tube
GB976619A (en) * 1960-03-05 1964-12-02 Emi Ltd Improvements in or relating to photo-emissive devices
US3039017A (en) * 1960-04-12 1962-06-12 Clinton E Brown Image intensifier apparatus
DE1236679B (en) * 1965-01-15 1967-03-16 Fernseh Gmbh Photocell with secondary electron multiplier and with shielding devices against transmission of light from the space containing the secondary electron multiplier to the photocathode
US3510714A (en) * 1967-05-01 1970-05-05 Research Corp Solar energy converter with trough-shaped cathode and shielded,planar anode
GB2030355B (en) * 1978-09-15 1982-08-25 English Electric Valve Co Ltd Electron beam tubes
US4393322A (en) * 1980-08-15 1983-07-12 Warner Lambert Technologies, Inc. Image intensifier faceplate
DE4009334C2 (en) * 1990-03-23 2000-11-23 Perkin Elmer Bodenseewerk Zwei Illumination arrangement for applying a photomultiplier to a two-beam photometer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732514A (en) * 1956-01-24 henderson
BE405023A (en) * 1933-09-13
US2179083A (en) * 1936-08-08 1939-11-07 Aeg Electron image tube
DE889657C (en) * 1937-05-04 1953-09-14 Fernseh Gmbh Secondary electron amplifier
US2231698A (en) * 1938-06-10 1941-02-11 Rca Corp Electron multiplier
NL57179C (en) * 1939-03-28
BE440048A (en) * 1939-12-16
GB597186A (en) * 1945-08-10 1948-01-20 Farnsworth Television & Radio Photoelectric cell using electron multiplication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281043B (en) * 1957-07-06 1968-10-24 Emi Ltd Arrangement of louvre-like inclined dynode sheets for electron multiplier tubes
GB2146169A (en) * 1983-05-25 1985-04-11 Philips Nv Photomultiplier tube

Also Published As

Publication number Publication date
DE1014242B (en) 1957-08-22
CH299516A (en) 1954-06-15
FR1053071A (en) 1954-01-29
US2841728A (en) 1958-07-01

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