In view of the widespread problem of large noise and low signal-to-noise ratio in long wave infrared system, the analysis method of 3-D noise model theory was emphasized, and a set of long wave infrared noise measurement system was designed. With the imaging system, continuous acquisition of image data was completed from different temperature blackbody under different integration time. The influence of noise components on system signal-to-noise ratio was analyzed in-depth by values of noise components which were calculated by the data. The results present that the dominant noise of long wave infrared system is that row and column non-uniformity results in, and spatial noise is worse than temporal noise and becomes the key factor of restriction to system signal-to-noise ratio improvement. This work provides theory basis for improvement of signal-to-noise ratio of the long wave infrared system.
国家科技期刊平台
NSTL
万方数据
维普
