Alkali metal vapour dynamics during Na2KSb (Cs) photocathode growth

We present four receiver designs for a ladar system, based on an optical parametric amplifier, that is designed to collect returns from glint targets. After coupling the return energy into periodically poled lithium niobate, the target backscatter is detected with either an infrared camera or a CCD array. Assuming reasonable detector and system characteristics, the sensitivity of each design is then evaluated by setting the receiver SNR detection threshold equal to one and using the minimum transmitted energy as the figure of merit. Through numerical analysis, we show that an upconversion receiver followed by a visible CCD array offers the best trade-off between sensitivity and practical design for airborne ladar applications.

/pdf/sensitivity-comparison-of-ladar-receivers-designed-to-detect-1vmjcty544.pdf

Sensitivity comparison of ladar receivers designed to detect glint targets

In this paper, electrooptical evaluation techniques of image intensifier tubes for some of the important parameters like resolving power, absolute spectral responses of photocathode,  spectral response of phosphor screen, modulation transfer function, recovery time, gas grade, and fixed-pattern noise have been described

http://publications.drdo.gov.in/ojs/index.php/dsj/article/download/2064/1096

Electrooptical Evaluation Techniques of Image Intensifier Tubes-Part I1

Many years of research in Philips laboratories have enabled the development of a second generation image intensifier, the XX 1610, with characteristics close to an image intensifier of the third generation. In this paper, we will describe the various technical characteristics which determine the excellent performance of the XX 1610, such as photocathode sensitivity, signal to noise ratio, modulation transfer function and mean time to failure. We have made a comparison between image intensifiers of the second and third generation and the XX 1610. It is shown that the XX 1610 nearly matches the performance of a third generation image intensifier in term of equipment performance. When economic factors are also taken into account, the XX 1610 can be considered as a very competitive image intensifier.

Joost Schrijvers

Papers

XX 1610 The Super Second Generation Image Intensifier