SE322259BSE1446666ASE1446666ASE322259BSE 322259 BSE322259 BSE 322259BSE 1446666 ASE1446666 ASE 1446666ASE 1446666 ASE1446666 ASE 1446666ASE 322259 BSE322259 BSE 322259B
Authority
SE
Sweden
Application number
SE1446666A
Inventor
Roosmalen J Van
Original Assignee
Philips Nv
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 Philips NvfiledCriticalPhilips Nv
Publication of SE322259BpublicationCriticalpatent/SE322259B/xx
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
H01J31/26—Image pick-up tubes having an input of visible light and electric output
H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon
H01J31/38—Tubes with photoconductive screen, e.g. vidicon
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
H01J29/46—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