摘要
提出了一种基于偏振的散斑干涉速度测量方法,分析了圆偏振光照射运动的粗糙表面时,反射或散射光与线偏振参考光干涉产生正交偏振散斑的原理,推导了动态正交偏振散斑信号的表达式。用数值模拟实验研究了正交散斑信号强度的变化,得出了一维运动粗糙表面速度方向的判别方法及速度的大小。研究结果表明,基于偏振的散斑干涉测量方法,在速度传感测量应用中可以同时获得速度的大小和方向,克服了大多数散斑测量方法只能测量速率的不足。
It is presented a method of velocity sensing based on polarization of the speckle interference.The principle of producing orthogonal polarized speckle is analyzed,that is the linearly polarized reference beam interferes with the reflected or scattered light from a rough surface which is illuminated by the circular polarized light.The expression of the dynamic orthogonal polarization speckle signal and is deduced.We study the variation of strength of the orthogonal speckle signals and get the way of determining the direction of velocity and the speed in one-dimensional rough surface by numerical simulations.The research result shows that the method basing on the polarization of the speckle interference can simultaneously give the magnitude and direction of velocity in the application of speed-sensing measurements,which overcome the shortage of giving only the magnitude of velocity in many other ways of speckle measurement.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2010年第2期160-163,共4页
Journal of Nanchang University(Natural Science)
基金
国家自然科学基金资助项目(60808019)
江西省自然科学基金资助项目(2008GQW0002)
关键词
偏振
激光散斑
正交干涉
速度传感
polarization
laser speckle
orthogonal interference
velocity sensing
