GB1395441A – Image intensifiers
– Google Patents
GB1395441A – Image intensifiers
– Google Patents
Image intensifiers
Info
Publication number
GB1395441A
GB1395441A
GB267873A
GB267873A
GB1395441A
GB 1395441 A
GB1395441 A
GB 1395441A
GB 267873 A
GB267873 A
GB 267873A
GB 267873 A
GB267873 A
GB 267873A
GB 1395441 A
GB1395441 A
GB 1395441A
Authority
GB
United Kingdom
Prior art keywords
layer
reflective
membranes
input electrode
thick
Prior art date
1973-01-18
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
GB267873A
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 Components Ltd
Original Assignee
Mullard 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.)
1973-01-18
Filing date
1973-01-18
Publication date
1975-05-29
1973-01-18
Application filed by Mullard Ltd
filed
Critical
Mullard Ltd
1973-01-18
Priority to GB267873A
priority
Critical
patent/GB1395441A/en
1974-01-14
Priority to US433534A
priority
patent/US3898498A/en
1974-01-15
Priority to DE2401662A
priority
patent/DE2401662A1/en
1974-01-16
Priority to JP49007806A
priority
patent/JPS49106279A/ja
1974-01-17
Priority to FR7401583A
priority
patent/FR2214964B2/fr
1975-05-29
Publication of GB1395441A
publication
Critical
patent/GB1395441A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H01J43/06—Electrode arrangements
H01J43/18—Electrode arrangements using essentially more than one dynode
H01J43/24—Dynodes having potential gradient along their surfaces
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
H01J31/506—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output tubes using secondary emission effect
H01J31/507—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output tubes using secondary emission effect using a large number of channels, e.g. microchannel plates
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/02—Manufacture of electrodes or electrode systems
H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
H01J9/125—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes of secondary emission electrodes
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J2201/00—Electrodes common to discharge tubes
H01J2201/32—Secondary emission electrodes
Abstract
1395441 Image intensifier tubes; electron multipliers MULLARD Ltd 18 Jan 1973 2678/73 Addition to 1175599 Heading HID An image intensifier tube comprises in combination a channel plate as claimed in any one of claims 1 to 4 of the parent Specification, a photo-cathode spaced from the input face of the plate, and a display screen, wherein the channel plate input face comprising the conductive membranes is substantially non-reflective of radiation of wavelengths to which the photocathode is sensitive. The membrane may be continuous, superposed on the input electrode as in Fig. 2, or insulated from the input electrode to be at a different potential as in Fig. 3 (not shown). Alternatively membranes may be extensions of the input electrode to form together a continuous layer, Fig. 4 (not shown). Opaqueness of membranes to visible and U.V. radi tion inhibits feedback from a display screen which then requires no metal backing. Membranes D may be separate elements with their edges in electrical contact with input electrode in which ease the latter are also non- reflective. A continuous layer may include a self-supporting layer or film of A1 which is crystalline (non-reflective) and a second layer of amorphous A1 (non-reflective or «black»). In fabrication, a lacquer film is produced by flotation on water, placed over an input face in Figs. 2, 3 or on a glass substrate for the Fig. 4 device, followed by evaporation of the A1. For a glass matrix reduction of a metal (e.g. Pb) compound in the matrix for the requisite conductivity, may be repeated after final baking of the second layer in air or oxygen or can be postponed until after baking. The first A1 layer should be 200 thick. The second A1 layer is also evaporated but in an inert gas (e.g. nitrogen at 0À05 torr), the lacquer then being burned off. The amorphous layer thickness may be assessed by reflection of a glowing filament and is preferably 300 to 800 thick. Channel plate specifications are given with an A1 film Df 500 to 1000 thick. Image intensifier tubes of «proximity» and «inverter» type are exemplified.
GB267873A
1973-01-18
1973-01-18
Image intensifiers
Expired
GB1395441A
(en)
Priority Applications (5)
Application Number
Priority Date
Filing Date
Title
GB267873A
GB1395441A
(en)
1973-01-18
1973-01-18
Image intensifiers
US433534A
US3898498A
(en)
1973-01-18
1974-01-14
Channel multiplier having non-reflective amorphous aluminum layer obturating channel entrances on side facing photocathode
DE2401662A
DE2401662A1
(en)
1973-01-18
1974-01-15
ELECTRON MULTIPLE
JP49007806A
JPS49106279A
(en)
1973-01-18
1974-01-16
FR7401583A
FR2214964B2
(en)
1973-01-18
1974-01-17
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB267873A
GB1395441A
(en)
1973-01-18
1973-01-18
Image intensifiers
Publications (1)
Publication Number
Publication Date
GB1395441A
true
GB1395441A
(en)
1975-05-29
Family
ID=9743853
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB267873A
Expired
GB1395441A
(en)
1973-01-18
1973-01-18
Image intensifiers
Country Status (5)
Country
Link
US
(1)
US3898498A
(en)
JP
(1)
JPS49106279A
(en)
DE
(1)
DE2401662A1
(en)
FR
(1)
FR2214964B2
(en)
GB
(1)
GB1395441A
(en)
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4475059A
(en)
*
1982-06-01
1984-10-02
International Telephone And Telegraph Corporation
Image intensifier tube with reduced veiling glare and method of making same
US4691099A
(en)
*
1985-08-29
1987-09-01
Itt Electro Optical Products
Secondary cathode microchannel plate tube
US5268612A
(en)
*
1991-07-01
1993-12-07
Intevac, Inc.
Feedback limited microchannel plate
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3243626A
(en)
*
1962-07-17
1966-03-29
Rca Corp
Photosensitive cathode with closely adjacent light-diffusing layer
GB1175599A
(en)
*
1967-11-28
1969-12-23
Mullard Ltd
Improvements in or relating to Image Intensifiers and the like
US3588570A
(en)
*
1968-04-29
1971-06-28
Westinghouse Electric Corp
Masked photocathode structure with a masked,patterned layer of titanium oxide
1973
1973-01-18
GB
GB267873A
patent/GB1395441A/en
not_active
Expired
1974
1974-01-14
US
US433534A
patent/US3898498A/en
not_active
Expired – Lifetime
1974-01-15
DE
DE2401662A
patent/DE2401662A1/en
active
Pending
1974-01-16
JP
JP49007806A
patent/JPS49106279A/ja
active
Pending
1974-01-17
FR
FR7401583A
patent/FR2214964B2/fr
not_active
Expired
Also Published As
Publication number
Publication date
FR2214964B2
(en)
1976-11-26
US3898498A
(en)
1975-08-05
JPS49106279A
(en)
1974-10-08
DE2401662A1
(en)
1974-08-08
FR2214964A2
(en)
1974-08-19
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Legal Events
Date
Code
Title
Description
1975-10-08
PS
Patent sealed [section 19, patents act 1949]
1988-11-16
PE20
Patent expired after termination of 20 years
