Robust fringe pattern analysis method for transient phenomena

Mariano Rivera

doi:10.1016/j.optlaseng.2018.03.013

2018-09-01

PRE

Mariano Rivera *

DOI：10.1016/j.optlaseng.2018.03.013

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摘要

En 中文

We propose a method for analysing a sequence of noisy interferograms with closed fringes acquired at a high speed frame rate. Our method is appropriate for analysing ESPI sequences of transient phenomena such as deformations caused by vibrations. Firstly, we compute a differential phase between frames using a procedure based on a Gabor filter bank. We then refine this initial phase with a regularised quadratic cost function that keeps the consistency of the restored phase with the fringe patterns. In addition, we also present the robust version of our phase refining method. This prevents the introduction of phase deformations by the smoothing process. We demonstrate by means of numerical and real data experiments that our method is appropriate for analysing ESPI sequences of transient phenomena.

Keyword:

Imaging ultrafast phenomena

Fringe analysis

Speckle interferometry

Optical metrology

Vibration analysis

Two phase step methods

Gabor filter bank

Robust image processing

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期刊

Optics and Lasers in Engineering

IF:

3.7

论文数:

7.3K

被引数:

1.7W

机构

instituto potosino investigacion cientifica y tecnologica

学者数:

1.4K

论文数: 1.2K

被引数: 1

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