典型形状飞行器反射光强的计算

The Reflection Luminous Intensity Evaluation of Typcal Flyer

用光学系统探测和跟踪各种飞行器时,对目标的可测性(作用距离),系统的信噪比起至关重要作用的物理量是飞行器在探测方向上的光强或辐射强度。它除了与入射光的照度或辐照度、飞行器表面的反射率、飞行器形状有关以外,还与入射光、观测方向和飞行器三者之间的几何关系有关。本文分别对平面、球面、圆柱面和圆锥面等典型形状计算了不同几何关系下的反射光强,然后计算了火箭形状飞行器的反射光强。

Luminous intensity or radiance intensity of flyers is very important phsical parameter for the system signal to noise ratio when they are detected or tracked by a optical system. The reflection luminous intensity depands on the illumiance of incident light the shape and the surface reflectance of flyer, the geometrical relation between the directions of sight and incident light. The calculations for reflection luminous intensities of plane, sphere, cylinder and circular cone are given in this paper. Then, the reflection luminous intensity of a rocket is calculated with above results.