非像面散斑法层析火焰折射率场分布

REFRACTIVE INDEX PROFILING ACROSS A FLAME USING NONIMAGE SPECKLES TECHNIQUE

本文通过理论分析给出了激光束通过火焰后的偏转角与折射率的关系,并给出了透镜后非像面散斑与火焰周围介质折射率场的关系表达式。用双曝光散斑法层析了火焰上不同截面的折射率分布。给出实验结果,并予以讨论。

By theoretical analysis, relationship between deflective angle and refractive index was given, and the relationship between nonimage speckles and refractive index around a flame was obtained. Refractive index at different height in the region above a flame was tomographed. The results was given and discussed.