基于时间小波变换散斑图案干涉测量法的连续面内位移测量

Continual in-plane displacement measurement with temporal wavelet transform speckle pattern interferometry.

作者信息

Gao Zhan, Deng Yan, Duan Yiting, Zhang Zhifeng, Wei Cheng, Chen Shiqian, Cui Jianying, Feng Qibo

机构信息

Key Laboratory of Luminescence and Optical Information of Ministry of Education, Beijing Jiaotong University, Beijing, China.

出版信息

Rev Sci Instrum. 2012 Jan;83(1):015107. doi: 10.1063/1.3675896.

DOI:10.1063/1.3675896

PMID:22299986

Abstract

A heterodyne temporal speckle pattern interferometer that measures the in-plane displacement dynamically has been built. The object is displaced in its plane continuously and the frequency-modulated output signals with a carrier frequency are recorded by a CCD camera. The displacement information is extracted with wavelet transform technique. Preliminary experiments have been performed with such interferometer. The respective measurement results recovered from wavelet transform and Fourier transform are compared.

摘要

已搭建了一种用于动态测量面内位移的外差式时间散斑图案干涉仪。物体在其平面内连续位移，具有载波频率的调频输出信号由电荷耦合器件（CCD）相机记录。利用小波变换技术提取位移信息。已使用这种干涉仪进行了初步实验。比较了从小波变换和傅里叶变换恢复的各自测量结果。