计算波状表面半透明流体层光谱反射特性的光线分裂跟踪法

提出一种计算具有波状表面的半透明流体层光谱反射特性的光线分裂跟踪法.对平行入射和漫入射光谱分别采用正向和反向跟踪计算,实现了对光线的分裂跟踪.该方法计算思路简捷、速度快、需用内存小,对此类问题的求解有良好的适应性.算例结果表明,表面的波状弯曲降低了流体层对漫入射光谱的反射能力;但对平行入射光谱,呈现出两种相反的影响.

A RAY SPLIT-OFF AND TRACING APPROACH FOR ANALYZING THE SPECTRAL REFLECTING PERFORMANCE OF A SEMITRANSPARENT FLUID LAYER WITH UNDULANT SURFACE

A ray split-off and tracing approach is presented to analyze the apparent spectral reflecting performance of a semitransparent fluid layer with undulant surface.For parallel incidence and diffuse incidence of the spectral radiation,the regular ray tracing and the inverse ray tracing are separately employed to realize tracing the ray split-off process.With a clear and simple solving idea, the approach possesses a high calculating rate and small demands for the EMS memory,and is flexible for this kind of problems.The results of the calculating example show the following facts.For diffuse incidence of the spectral radiation,the undulant curve of the surface lowers the reflecting ability of the fluid layer.While for parallel incidence of the spectral radiation,two kinds of different influences on the reflecting ability may be caused by the undulant curve.