Toto-Arellano Noel-Ivan, Gómez-Méndez Gustavo A, Martínez-García Amalia, Otani Yukitoshi, Serrano-García David I, Antonio Rayas Juan, Rodríguez-Zurita Gustavo, García-Lechuga Luis
Appl Opt. 2020 Sep 20;59(27):8160-8166. doi: 10.1364/AO.401309.
Methods for measuring variations in diffuse surfaces using electronic speckle pattern interferometry (ESPI) are widely used and well known. In this research, we present an out-of-plane ESPI system coupled to a Michelson configuration to generate simultaneous parallel interferograms with different phase shifts. The system uses circular polarization states to generate parallel phase shifted interferograms. Due to the polarization states, the fringes do not experience a contrast reduction, thus avoiding measurement errors that affect spatial or temporal phase-shifting in interferometry. The basic operating principle of polarization modulation is described, and results that represent the temporal evolution of an aluminum plate are presented. The generation of two simultaneous patterns allows one to track the dynamic performance of the plate.
使用电子散斑图案干涉测量法（ESPI）测量漫反射表面变化的方法已被广泛使用且广为人知。在本研究中，我们提出了一种与迈克尔逊配置耦合的离面ESPI系统，以生成具有不同相移的同时平行干涉图。该系统使用圆偏振态来生成平行相移干涉图。由于偏振态，条纹不会出现对比度降低的情况，从而避免了影响干涉测量中空间或时间相移的测量误差。描述了偏振调制的基本工作原理，并给出了代表铝板时间演变的结果。两个同时图案的生成使得能够跟踪板材的动态性能。
