GB1258247A - - Google Patents

Info

Publication number
GB1258247A
GB1258247A GB1258247DA GB1258247A GB 1258247 A GB1258247 A GB 1258247A GB 1258247D A GB1258247D A GB 1258247DA GB 1258247 A GB1258247 A GB 1258247A
Authority
GB
United Kingdom
Prior art keywords
metal
photo
resist
etching
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
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 filed Critical
Publication of GB1258247A publication Critical patent/GB1258247A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/34—Photo-emissive cathodes
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/38—Photoelectric screens; Charge-storage screens not using charge storage, e.g. photo-emissive screen, extended cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/34—Photoemissive electrodes
    • H01J2201/342—Cathodes
    • H01J2201/3421—Composition of the emitting surface
    • H01J2201/3425—Metals, metal alloys

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

1,258,247. Image intensifier tubes. ENGLISH ELECTRIC VALVE CO. Ltd. 5 May, 1969 [18 June, 1968], No. 28874/68. Heading HID. A photocathode for an image intensifier to be used as an electronic .shutter in high-speed photography, is deposited on a metal mesh substrate preferably having 750-1000 square holes per linear inch. In one method of manufacture a copper mesh is pressed into a glass substrate by optically polished carbon blocks whilst the glass is heated (e.g. to 900‹ C.) in a reducing atmosphere. In another method a fibre optics face plate is coated with a photo-resist layer which is exposed to light through the plate; after developing and etching a film of metal such as gold/palladium alloy or silver or aluminium is sputtered or evaporated on and polished to leave the metal only in the grooves formed by the etching. In another method the grooves are formed on an optically flat surface by scribing with a diamond or by a photo-resist method, followed by metal deposition as in the previous method. A further method comprises applying a photo-resist to a chromium covered surface to expose parts of the chromium surface which are then etched away. The resulting transverse resistance may be less than 1 ohm per square and the cathode sensitivity may be about 120 ÁA/L. Reference has been directed by the Comptroller to Specification 1,217,477.
GB1258247D 1968-06-18 1968-06-18 Expired GB1258247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2887468 1968-06-18

Publications (1)

Publication Number Publication Date
GB1258247A true GB1258247A (en) 1971-12-22

Family

ID=10282557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258247D Expired GB1258247A (en) 1968-06-18 1968-06-18

Country Status (4)

Country Link
DE (1) DE1930355A1 (en)
FR (1) FR2011138A1 (en)
GB (1) GB1258247A (en)
NL (1) NL6908584A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9728931B2 (en) 2013-12-05 2017-08-08 Asml Netherlands B.V. Electron injector and free electron laser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9728931B2 (en) 2013-12-05 2017-08-08 Asml Netherlands B.V. Electron injector and free electron laser
US10103508B2 (en) 2013-12-05 2018-10-16 Asml Netherlands B.V. Electron injector and free electron laser

Also Published As

Publication number Publication date
NL6908584A (en) 1969-12-22
DE1930355A1 (en) 1970-01-02
FR2011138A1 (en) 1970-02-27

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Legal Events

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