Kulkarni Rishikesh, Rastogi Pramod
Opt Express. 2014 Apr 7;22(7):8703-11. doi: 10.1364/OE.22.008703.
A new method based on pseudo-Wigner-Hough transform is proposed for the simultaneous measurement of the in-plane and out-of-plane displacements using digital holographic moiré. Multiple interference phases corresponding to the in-plane and out-of-plane displacement components are retrieved from a single moiré fringe pattern. The segmentation of the interference field allows us to approximate it with a multicomponent linear frequency modulated signal. The proposed method accurately and simultaneously estimates all the phase parameters of the signal components without the use of any signal separation techniques. Simulation and experimental results demonstrate the efficacy of the proposed method and its robustness against the variations in object beam intensity.
提出了一种基于伪维格纳-霍夫变换的新方法，用于利用数字全息莫尔条纹同时测量面内和面外位移。从单个莫尔条纹图案中获取与面内和面外位移分量相对应的多个干涉相位。干涉场的分割使我们能够用多分量线性调频信号对其进行近似。该方法无需使用任何信号分离技术，就能准确且同时估计信号分量的所有相位参数。仿真和实验结果证明了该方法的有效性及其对物光束强度变化的鲁棒性。
