Jakobsen Michael L, Iversen Theis F Q, Yura Harold T, Hanson Steen G
DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Roskilde, Denmark.
Appl Opt. 2011 Oct 1;50(28):5577-91. doi: 10.1364/AO.50.005577.
This paper analyzes the dynamics of laser speckles and fringes, formed in an imaging-speckle-pattern interferometer with the purpose of sensing linear three-dimensional motion and out-of-plane components of rotation in real time, using optical spatial-filtering-velocimetry techniques. The ensemble-average definition of the cross-correlation function is applied to the intensity distributions, obtained in the observation plane at two positions of the object. The theoretical analysis provides a description for the dynamics of both the speckles and the fringes. The analysis reveals that both the magnitude and direction of all three linear displacement components of the object movement can be determined. Simultaneously, out-of-plane rotation of the object including the corresponding directions can be determined from the spatial gradient of the in-plane fringe motion throughout the observation plane. The theory is confirmed by experimental measurements.
本文运用光学空间滤波测速技术，分析了成像散斑图案干涉仪中形成的激光散斑和条纹的动力学特性，目的是实时感测线性三维运动和旋转的面外分量。互相关函数的总体平均定义应用于在物体的两个位置的观察平面中获得的强度分布。理论分析给出了散斑和条纹动力学的描述。分析表明，可以确定物体运动的所有三个线性位移分量的大小和方向。同时，可以从整个观察平面内平面条纹运动的空间梯度确定物体的面外旋转及其相应方向。实验测量证实了该理论。
