用任意条纹级数法解释双曝光全息干涉图

Interpretation of Double Exposure Holograms with the Method of Assigning Fringe Order

当物体上没有零位移区域时,双曝光全息干涉图上便找不到零级条纹.此时,通过任意指定物体上参考点的条纹级数,当观察方向数与被测物点数满足一定关系时,便可求得物体的绝对位移矢量.本文对该方法进行论述、误差分析以及实验验证.

If there are no areas with zero-displacement on an object, there exist no zero-order fringes on the holographic interferograms.In this case, We can freely assign the fringe orders of the reference object point.And when the numbers of observation directions and object points satisfy some conditions, the displacement vectors of all object points can be obtained.In this paper, the principle and error analysis of this method are discussed and an experimental result is given.