H01J31/34 - CPC Classification

Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored; 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

• H01J31/36 » Tubes with image amplification section, e.g. image-orthicon 1
• H01J31/38 » Tubes with photoconductive screen, e.g. vidicon 3