Measurement of image intensifier system modulation transfer function by video signal analysis

A technique for the measurement of the modulation transfer function (MTF) of image intensifier systems by means of video signal analysis is presented. The MTF can be measured in both horizontal and vertical directions. The method is applicable to routine quality assurance testing in the field. The limitations on accuracy of the technique are investigated by computer simulation. Experimental results reported for several image intensifier systems correlate well with subjective assessments of limiting resolution and other parameters.