GB1219737A - Improvements in image converters - Google Patents

Improvements in image converters

Info

Publication number
GB1219737A
GB1219737A GB34565/69A GB3456569A GB1219737A GB 1219737 A GB1219737 A GB 1219737A GB 34565/69 A GB34565/69 A GB 34565/69A GB 3456569 A GB3456569 A GB 3456569A GB 1219737 A GB1219737 A GB 1219737A
Authority
GB
United Kingdom
Prior art keywords
envelope
conductive
conductive layer
anode
focus electrode
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
GB34565/69A
Inventor
Constantin S Szegho
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.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
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 Zenith Radio Corp filed Critical Zenith Radio Corp
Publication of GB1219737A publication Critical patent/GB1219737A/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
    • H01J31/501—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electrostatic electron optic system

Landscapes

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

Abstract

1,219,737. Image converter tubes. ZENITH RADIO CORP. 9 July, 1969 [30 Aug., 1968], No. 34565/69. Heading H1D. An image converter, e.g. an X-ray converter for nuclear medical examination, has a focus electrode comprising a conductive layer 14 formed on the internal surface of the cylindrical envelope portion 10b between the electronimage source 12 and the image screen 13 and also including a part spaced from the envelope wall extending axially towards the anode from the conductive layer 14 and supported by an inwardly directed annular envelope extension 20. The arrangement increases the effective separation of the focus electrode conductive layer 14 and a conductive band 16d on the internal surface of the envelope portion 10d and which forms part of the anode structure. As shown, focus electrode coating 14, e.g. of Cu or Al, is connected via conductive coating 20a to a conductive ring 21 which surrounds the conical section 16a of the anode. To avoid disturbances of the focusing field projection 20 is formed close to the envelope wall and specific envelope dimensions of an example are given. To reduce the effects of electron impingement on the shoulder portion 10e of the envelope a high resistivity coating 25, e.g. an evaporative film of calcium fluoride, may be provided. Alternatively a conical electron shield, Fig. 3 (not shown), secured to ring 21 or a unitary ring and frusto-conical electron shield, Fig. 4 (not shown), attached directly to projection 20, may protect the envelope section 10e.
GB34565/69A 1968-08-30 1969-07-09 Improvements in image converters Expired GB1219737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75644368A 1968-08-30 1968-08-30

Publications (1)

Publication Number Publication Date
GB1219737A true GB1219737A (en) 1971-01-20

Family

ID=25043505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34565/69A Expired GB1219737A (en) 1968-08-30 1969-07-09 Improvements in image converters

Country Status (2)

Country Link
US (1) US3577027A (en)
GB (1) GB1219737A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380147A1 (en) * 1989-01-09 1990-08-01 Koninklijke Philips Electronics N.V. Image intensifier tube comprising a chromium-oxide coating

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28821E (en) * 1970-09-19 1976-05-18 Matsushita Electronics Corporation Pick-up tube envelope sealant extending into groove of annular target support
US3714488A (en) * 1970-09-19 1973-01-30 Matsushita Electronics Corp Pick-up tube envelope sealant extending into groove of annular target support
DE2049127C3 (en) * 1970-10-07 1975-04-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen Image intensifier
DE2461262B2 (en) * 1974-12-23 1978-09-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen X-ray image intensifier tube
US4000432A (en) * 1975-07-25 1976-12-28 Varian Associates Magnetic shield for image intensifier tube

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026437A (en) * 1958-10-20 1962-03-20 Rauland Corp Electron discharge device
US3280356A (en) * 1958-07-17 1966-10-18 Rca Corp Image tube with truncated conical anode and a plurality of coaxial shield electrodes
GB971495A (en) * 1960-10-28 1964-09-30 Mullard Ltd Improvements in and relating to electron-optical image converter tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380147A1 (en) * 1989-01-09 1990-08-01 Koninklijke Philips Electronics N.V. Image intensifier tube comprising a chromium-oxide coating

Also Published As

Publication number Publication date
US3577027A (en) 1971-05-04

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