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为解决对目标红外隐身效果以及红外成像导引头探测性能进行评估的问题,推导了计算目标空间频率的迭代方法,得到了红外成像导引头对扩展源目标的发现和识别概率。计算中考虑了目标的平均温差,最小修正可分辨温差,仪器调制传递函数以及大气透过率等因素对探测性能的影响,并对点源目标情况进行了简单的修正。给出了一种在实用条件下快速计算红外成像导引头对目标发现与识别概率的方法。
In order to solve the target infrared stealth effect and infrared imaging seeker detection performance, an iterative method to calculate the target spatial frequency is deduced. The probability of finding and identifying the extended target by infrared imaging seeker is obtained. In the calculation, the influence of the average temperature difference of the target, the temperature difference with the smallest correction, the modulation transfer function of the instrument and the atmospheric transmittance on the detection performance are considered, and the point sources and targets are simply amended. A method of quickly calculating the probability of target detection and recognition of infrared imaging seeker under practical conditions is given.