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分析了影响红外导引头探测能力的关键因素 ,采用噪声等效通量密度来表征导引头系统的探测能力 ,研究了系统的信噪比 :目标的红外辐射包括目标自身的热辐射 ,以及目标反射地球、太阳和天空的辐射。作用在探测器上的总的噪声等效通量密度为大气背景的噪声等效通量密度和系统自身的噪声等效通量密度的均方根和 ,推导出了红外导引头探测能力的数学模型 ,并对大气光学效应和气动光学效应的影响进行了初步讨论。
The key factors affecting the detection ability of infrared seeker are analyzed. The noise equivalent flux density is used to characterize the detection capability of the seeker system. The signal-to-noise ratio of the system is studied. The target’s infrared radiation includes the target’s own thermal radiation, The target reflects the earth, the sun and the sky’s radiation. The total noise equivalent flux density acting on the detector is the root mean square sum of the noise equivalent flux density of the atmospheric background and the system’s own noise equivalent flux density, and the infrared seeker detection capability Mathematical model, and the atmospheric optical effects and aerodynamic effects of a preliminary discussion.