Βι¶ΉΤΌΕΔ

Research & Development

Abstract

The exposure of a camera tube to a brief flash of light and the measurement of the magnitude of the signal current after a known number of television fields can provide an indication of the speed of response of the tube to changing light levels. A meter which permits accurate measurements, in the presence of noise, to within an accuracy of +/- 0.1% of white level is described and its performance is discussed.