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基于物理光学原理,由衍射光学理论推导计算光学系统对光学整流罩的像平面光场能量分布,获得在探测器平面上的整流罩热辐射光场归一化分布。用普朗克公式表述光学整流罩产生的气动热噪声强度。采用物理机理建模,可得较可信的气动热探测热噪声模型。对不同速度下载机产生不同温度的气动热噪声进行分析,由此评估在气动热噪声条件下,红外探测系统的探测效能。
Based on the principle of physical optics, the energy distribution of the image plane light field of the optical fairing by the optical system is deduced from the theory of diffractive optics, and the normalized distribution of the heat radiation field of the fairing on the detector plane is obtained. The Planck formula is used to describe the aerodynamic thermal noise intensity generated by the optical cowl. Using physical mechanism modeling, we can get more credible aerodynamic thermal detection thermal noise model. The aerodynamic thermal noise with different temperature of different speed loaders was analyzed to evaluate the detection performance of the infrared detection system under aerodynamic thermal noise conditions.