| || Electrooptical evaluation techniques of image intensifier tubes :Part I
Author : Bhasin, I. J.;Goyal , N. K.;Jain , V. K.
Source : Defence Science Journal ; Vol:54(2) ; 2004 ; pp 199-208
Subject : 535 Optics
Keywords : Passive night vision devices;Night vision devices;Image intensifier tubes;Electrooptical devices;Electrooptical tubes;Photocathodes;GaAs photocathode;Equivalent background illumination
Abstract : Passive night vision devices are used for viewing the military targets at low light levels of illuminations during night. In these passive night vision devices, image intensifier tubes are used to amplify scene imagery. The performance of these tubes depends upon electrooptical parameters. The techniques of evaluating these parameters, eg , luminous gain, automatic rightness control and maximum screen luminance, photocathode sensitivity, radiant gain, equivalent background illumination, magnification and distortion, signal to noise ratio, veiling glare, screen brightness variation, etc. have been described.