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针对凝视型红外成像系统点目标探测,基于线性系统点扩散函数理论,对传统的探测性能分析方法进行修正,建立实际成像情况下信噪比与作用距离的数学模型。结合非周期传递函数与目标尺寸函数,分析并比较理想和实际成像情况下的点目标探测性能,对模拟结果进行精度分析。分析结果表明,对于典型的红外探测系统,点扩散函数因素的影响不可忽略。
Aiming at the point target detection of staring infrared imaging system, based on the linear system point spread function theory, the traditional detection performance analysis method is modified to establish the mathematical model of signal-to-noise ratio and working distance under the actual imaging conditions. Combined with the non-periodic transfer function and the target size function, the target detection performance under ideal and actual imaging conditions is analyzed and compared, and the accuracy of the simulation results is analyzed. The analysis results show that, for a typical infrared detection system, the influence of the point spread function can not be neglected.