半透明平板对辐射亮度的衰减影响分析  

An Analysis on the Influence of Radiance Attenuation from a Semi-transparent Slab

作　　者：徐航[1] 孟卫华[1,2] 周珩[1,2] 孙金霞[1] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]航空制导武器航空科技重点实验室,河南洛阳471009

出　　处：《红外技术》2013年第1期47-49,共3页Infrared Technology

基　　金：航空科学基金项目;编号:20100112002

摘　　要：在半透明平板作为辐射亮度传输介质前提下,讨论了半透明平板对辐射亮度的衰减作用,利用正、逆向光线追迹法追踪了每条光线的传输路径,不仅考虑了平板作为传输介质对辐射亮度的衰减作用,还考虑了辐射亮度在平板内传输时,平板表面对其反射所引起的衰减。相比较传统算法中仅考虑平板作为传输介质对辐射的衰减,在考虑了半透明平板对辐射亮度的反射作用后,计算得出的结果更为精确,尤其是在出射角为/2时,该算法计算精度相比较传统算法提高了11.97倍。As a medium to transport radiance for semi-transparent slab, the influence of attenuation from a semi-transparent slab to radiance was discussed. By tracing the route of each ray with ray-racing method in forward and reversal direction, the attenuation from a semi-transparent slab and the reflection of the surface was taken into consideration. Compared with the traditional arithmetic which only Consider the attenuation from a semi-transparent slab, the calculated results were more accurate after considering the reflection of the surface. Especially when the launching angle is π/2, the precision will be 11.97 times high.

关 键 词：辐射亮度 光线追迹法 亮度衰减 反射影响 

分 类 号：TN256[电子电信—物理电子学]