On the Image Iconoscope, a Television Camera Tube |
Common terms and phrases
a(ib amplifier beam current Biph black level C.P.S.-emitron calculated cathode cathode potential cathode-ray tube chapter characteristics collector anode collector potential corresponding decrease deff deflection depth of focus electric electron beam electron current employed equals focused frame gamma correction illumination level image iconoscope image orthicon increase iphtot layer lens light line-by-line restoration measured mica mode of operation modern camera tubes monitor mosaic multiplier records Nipkow disk noise number of lines number of secondary optical image oscilloscope output curve output signal photo-cathode photo-conductive photo-electrons photo-sensitive pick-up device picture element picture quality potential image primary electrons reaching the collector redistribution current result scanning beam scene Schagen secondary electrons released secondary-emission coefficient sensitivity signal current signal output signal plate signal resistor signal-to-noise ratio spectral spurious signals ßiph stabilization potential successive scans target element target potential television camera tubes thermal noise total photo-current true black unilluminated V₁ video-signal vidicon Volts