Shimmer Like A Enhanced Snr Tester Analysis And Improvement Of Research

LLL image intensifier is one of the most important kind of night vision photoelectric image device at present, and it is used widely in many fields such as LLL night vision, optical radiation measurement, camera device and so on. Signal-to-noise ration (SNR) is an important parameter of the image intensifier. In this dissertation, the attention is focused on the measurement technology about the SNR of the image intensifier. The content in this dissertation is summarized as following:In the first chapter, the development and application of photoelectric image and LLL night vision are reviewed. The intention and signification are expatiated.In the second chapter, the principle, characteristics, types and parameters of LLL image intensifier are introduced. The measurement principle and methods about SNR are emphasized.In the third chapter, the general structure, optical system, mechanical structure, signal processing module, computer and measurement software of a imported SNR testset about LLL image intensifier are anatomized and analyzed.In the fourth chapter, the analyzed testset is improved. The signal processing module, data acquiring module and measurement software of testset are redeveloped. The computer in the testset is updated.In the fifth chapter, the improved testset is used to measure the SNR of imported image intensifies. The results are given and analyzed.The last chapter summarizes the whole dissertation, and pointes out the problems in the research that should be improved.