红外成像探测系统作用距离分析方法研究

Detect-ability Analyzing of IR FPA Tracking System

根据视频跟踪测量技术工程实践中 ,可靠跟踪测量对目标在探测器靶面上的成像尺寸、照度及对比度的要求 ,综合考虑背景辐射和目标成像弥散的影响 ,对原有红外探测系统作用距离计算公式进行了改进 ,给出了适用于红外焦平面成像探测系统的新的作用距离分析方法 ,并针对水平观测、非水平穿越大气层观测等应用条件推导了具体的计算公式 文中通过应用示例进行了比较分析 。

Based on the requirement for image size, irradiance, and contrast of the target on the detector plane in practical video tracking applications, and taking account of the background radiation and image dispersion, a new approach for analyzing the detecting-ability of IR FPA tracking system is presented. The calculation formula of evaluating the detecting-ability is deduced at the conditions of horizontal observation and penetrating through the whole atmosphere. By using the method to a practical sample, it shows that the new approach is more credible than the old one.