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The comparison of different temporal phase analysis algorithms in optical dynamic measurement

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The comparison of different temporal phase analysis algorithms in optical dynamic measurement

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Title: The comparison of different temporal phase analysis algorithms in optical dynamic measurement
Author: Miao, Hong; Fu, Yu
Copyright year: 2008
Abstract: In recent years, optical interferometry has been applied to whole-field, non-contact measurement of vibrating or continuously-deforming objects. In optical dynamic measurement, an interferogram sequence is obtained by a highspeed camera. Retrieving dynamic phase values from this interferogram sequence leads to a precise measurement of different kinematic and deformation parameters of a continuously-deforming or vibrating object. In this paper, this interferogram sequence is classified into two types: (i) intensity variation; and (ii) exponential phase signal. Different temporal phase retrieving techniques, such as Hilbert transform, Fourier transform, windowed Fourier transform and wavelet transform are applied to extract the phase from a simulated signal. The advantage and drawback of each algorithm are discussed. In addition, a new method based on the combination of Fourier transform and windowed Fourier transform is proposed and the simulation shows it can eliminate the noise and evaluate the phase more accurately.
Subject: DRNTU::Science::Physics::Optics and light
Type: Conference Paper
Conference name: Ninth International Symposium on Laser Metrology.
Research Centre: Temasek Laboratories
Rights: Copyright 2008 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Version: Published version

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