建立了焦平面探测器红外成像系统对红外目标的探测作用距离估算模型。该模型综合考虑了系统观测环境条件、目标红外辐射特性和焦平面探测器红外成像系统对探测作用距离的影响，能够有效估计系统对特定飞行目标的探测作用距离。依据该模型可科学地对红外成像系统的各关键技术参数进行论证计算，从而加强系统的顶层设计，为工程实践奠定理论基础，指导相关成像系统的研制过程。因此该模型具有十分重要的工程应用价值。

A model for estimating the detection distance of an infrared imaging system with a focal plane array is established. Taking the influences of system observation environment conditions, infrared radiation characteristics of targets and infrared imaging systems with focal plane arrays on the detection distance into account, the model can estimate the detection distance of an imaging system for a specific flight target effectively. With this model, the key technical parameters of an infrared imaging system can be calculated and verified scientifically. Thus, the top design of a system can be strengthened, the theoretical foundation can be laid for the engineering practice and the development process of the relative imaging system can be instructed. Therefore, the model is of very important value to engineering applications.