Research on Signal to Noise Ratio Characteristic Influence About Temperature Noise to Infrared Compound Eye Lens Array Imaging

Abstract

In order to study the effect of temperature noise on the performance of infrared compound eye lens array imaging system, and based on black body infrared radiation and infrared temperature measurement theory, this paper studied the effects of black body radiation temperature and ambient temperature changing on the imaging performance about signal to noise ratio (SNR) and definition of infrared compound eye lens imaging system. Theoretical mathematical model about influence of temperature noise on infrared compound eye imaging system was built. After finishing numerical simulation analysis and experimental test verification, not only the correctness of the model was proved, but also the conclusion was obtained that the clearer the image of the target presented by the compound eye lens array system, that was, the greater the value of SNR was, under the condition of the lower the ambient temperature noise was relative to the black body radiation temperature noise. Meanwhile, the phenomenon that limited SNR of the imaging capability of infrared compound eye lens array imaging system was about 26.4 db was found in the experiment. A theoretical basis for further research was provided, which was the control method of how to reduce the influence of temperature noise on infrared compound eye lens imaging system and to improve SNR of the system.