Abstract

This paper analyzed the technical characteristics of GaAs photocathode electrode with high sensitivity. Through measuring the output current of micro channel plate, the relation between incident light intensity and output current is summarized. Besides, we proposed the light intensity measurement method for the third generation low light level (LLL) image intensifier. By comparing our method with the method of measuring the intensity of the photoelectric multiplier tube, our method has the advantages of high sensitivity, fast response, independent of temperature, and measurement simplicity. The results indicate implicit linearity between micro channel plate and intensity of light under 10−4∼10−1lx environment. It verifies the validness of our method.

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