摘要
采用双光束干涉条纹模型,用光散射理论分析了激光多普勒测速中球形散射粒子的大小对散射光信噪比的影响。用数值解法求得了信噪比随散射粒子半径变化的曲线。仅从穿过测控区时光信号的信噪比这一方面考虑,结论是:粒子半径的取值不应大于干涉条纹宽度的0.35倍。
The scattering theory of light is applied to the analysis of the effect of scattering particle size on signal to noise ratio in Doppler speed measuring with laser device, in which the model of the interference fringes between two beams is employed. Mathematical method is applied to obtain the curves of the variation of signal to noise ratio with the variation of particle radius. It comes to a conclusion that the magnitude of particle radius should not be over 0.35 of interference fringe.
出处
《光学技术》
CAS
CSCD
2003年第2期164-165,共2页
Optical Technique
关键词
激光多普勒测速
散射粒子
信噪比
scattering particle
signal to noise ratio
speed measuring with laser device
