Non-invasive Mechanical Measurement for Transparent Objects by Digital Holographic Interferometry Based on Iterative Least-Squares Phase Unwrapping

Xia, Haiting; Guo, Rongxin; Fan, Zhongwei; Hu, Cheng; Yang, Bangcheng

doi:10.1007/s11340-011-9516-x

Cited by 23 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, phase unwrapping is applied when the displacement of the structure between the two instants is larger than almost half the wavelength of the laser source. The unwrapping algorithm used in this paper is based on least squares minimization 66 , 67 .…”

Section: Basic Principles Of the Measurement Techniquesmentioning

confidence: 99%

Comparison of three full-field optical measurement techniques applied to vibration analysis

O'Donoughue

Gautier

Meteyer

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Digital image correlation, deflectometry and digital holography are some of the full-field optical measurement techniques that have matured in recent years. Their use in vibroacoustic applications is gaining attention and there is a need for cataloging their performance in order to provide, to a broad community of users and potential future users, quantitative and qualitative evaluations of these three approaches. This paper presents an experimental comparison of the three optical methods in the context of vibration measurements, along with classical reference measurements provided by an accelerometer and a laser Doppler vibrometer. The study is carried out on two mechanical structures exhibiting various vibration responses when submitted to an impact.

show abstract

Section: Basic Principles Of the Measurement Techniquesmentioning

confidence: 99%

Comparison of three full-field optical measurement techniques applied to vibration analysis

O'Donoughue

Gautier

Meteyer

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The path-independent methods seek to find an unwrapped phase whose spatial differences match the differences in the wrapped phase data as closely as possible, in which the phase unwrapping is completed by minimization of a global function. Plenty of methods have been proposed to accomplish this task, such as the least square (LS)-based algorithms [41][42][43][44][45][46][47][48], the transport of intensity equation (TIE)-based algorithms [49][50][51][52][53][54][55][56][57], and the polynomial fitting-based algorithms [58][59][60][61][62][63].…”

Section: Comparative Study Of Phase Unwrapping Algorithms Based On So...mentioning

confidence: 99%

“…The direct methods consume very little time, but the performance is not satisfactory especially for the heavy noise cases. As a result, some iterative strategies [46][47][48] have been proposed to improve the performance of the direct ones at the cost of consuming more time. The development of the TIE-based methods is fascinating since it was not named the TIE in early times in [49][50][51] until [52] presented a detailed mathematical derivation of the TIE-based phase unwrapping algorithm.…”

Section: Comparative Study Of Phase Unwrapping Algorithms Based On So...mentioning

confidence: 99%

Comparative study of phase unwrapping algorithms based on solving the Poisson equation

Zhao

Zhang

et al. 2020

Meas. Sci. Technol.

View full text Add to dashboard Cite

Phase unwrapping is a crucial process to obtain the absolute phase profile in many optical phase measurement techniques such as interferometry, holography, profilometry, etc. In this paper, we have studied several phase unwrapping algorithms based on solving the discrete Poisson equation. The differences among those algorithms lie in two aspects: one is the calculation of the input for the Poisson equation using the wrapped phase data and the other is the way to compute the output (unwrapped phase data) using the corresponding input. Firstly, the method to compute the input for the Poisson equation was investigated using the finite difference and fast Fourier transform (FFT) methods. Then different methods, based on FFT or discrete cosine transform, were employed to calculate the unwrapped phase, and their performances were compared in terms of accuracy and efficiency. To enhance the precision of those algorithms, an iteration strategy was introduced and its performance was investigated under different noise conditions. Finally, several pieces of real phase data was tested by using the direct and iterative methods. The detailed software package can be found online (www.mathworks.com/matlabcentral/ fileexchange/71810-phase-unwrapping-algorithms-by-solving-the-poisson-equation).

show abstract

“…In the field of mechanical engineering, this constituted the underlying principle in holographic interferometry and Moire inteferometry. The former concerns measuring the properties of transparent specimens [3], whereas the latter is used to measure small deformations of non-transparent solids due to external forces and thermal expansions, as for example is described in [4,5]. Recently, a methodology which uses two sample probes for simultaneously measuring the refractive index and thickness of transparent specimens has been developed and demonstrated in [2].…”

Section: Existing Knowledgementioning

confidence: 99%

Thickness Measurement of Photoresist Thin Films Using Interferometry

Kossivas¹,

Doumanidis²,

Kyprianou³

2012

Interferometry - Research and Applications in Science and Technology

View full text Add to dashboard Cite

Non-invasive Mechanical Measurement for Transparent Objects by Digital Holographic Interferometry Based on Iterative Least-Squares Phase Unwrapping

Cited by 23 publications

References 18 publications

Comparison of three full-field optical measurement techniques applied to vibration analysis

Comparison of three full-field optical measurement techniques applied to vibration analysis

Comparative study of phase unwrapping algorithms based on solving the Poisson equation

Thickness Measurement of Photoresist Thin Films Using Interferometry

Contact Info

Product

Resources

About