Cathode-Ray Tube Terminology

This paper offers tentative definitions for many terms commonly used in cathode-ray tube work. The terms defined are magnetic deflection sensitivity, electrostatic deflection sensitivity, gun-current efficiency, electron gun, screen, screen luminous efficiency, screen actinic efficiency, screen radiant efficiency, spectral characteristic, relative radiant energy, color characteristic, visual spectral characteristic, actinic spectral characteristic, persistence characteristic, relative brilliance, candle power distribution characteristic, luminescence, phosphorescence, fluorescence phosphor, defocus, spot distortion, pattern distortion, spot size, spot diameter, line width, apparent spot size, apparent spot diameter, and apparent line width. The methods of measurement of gun-current efficiency, screen luminous efficiency, candle power, screen, actinic efficiency, screen radiant efficiency, spectral characteristic, persistence characteristic, candle power distribution characteristic, spot size, spot distortion, and pattern distortion are also included for clarifying purposes.