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.)
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbHfiledCriticalTelefunken AG
Application grantedgrantedCritical
Publication of FR830283ApublicationCriticalpatent/FR830283A/fr
H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
H01J29/58—Arrangements for focusing or reflecting ray or beam
H01J29/62—Electrostatic lenses
H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
FR830283D1936-12-031937-12-02Système d'optique électronique pour former sur un écran un spot extrêmement petit et nettement limité
ExpiredFR830283A
(fr)