Phase-shifted dynamic speckle pattern interferometry at 1 kHz

Huntley, Jonathan M.; Kaufmann, Guillermo H.; Kerr, David

doi:10.1364/ao.38.006556

Cited by 98 publications

(60 citation statements)

References 10 publications

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“…6 that if re-referencing is carried out too frequently, bias and high noise levels will be introduced into the phase maps. On the other hand, a low rate of rereferencing could produce large random errors due to large speckle decorrelation.…”

Section: Discussionmentioning

confidence: 99%

“…A high-speed speckle interferometry system based on this concept was recently developed by Huntley et al [6]. This system uses a digital video camera running at 1 kHz, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The Pockels cell was calibrated to achieve phase shifts of π/2 between successive frames by means of the procedure presented in Ref. 6.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of sub-surface delaminations in carbon fibre composites using high-speed phase-shifted speckle interferometry and temporal phase unwrapping

Dávila

Ruiz

Kaufmann

et al. 2003

Optics and Lasers in Engineering

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Citation: DAVILA, A. ... et al, 2003. Measurement of sub-surface delaminations in carbon fibre composites using high-speed phase-shifted speckle interferometry and temporal phase unwrapping. Optics AbstractA high-speed phase-shifted speckle interferometer has been developed recently for studying dynamic events. Speckle interferograms are continuously recorded by a CCD camera operating at 1 kHz with temporal phase shifting carried out by a Pockels cell running at the same frequency. Temporal phase unwrapping through sequences of more than 1000 frames allows the determination of time-varying absolute displacement maps. This paper presents the application of this speckle interferometry system to the detection and measurement of sub-surface delamination defects in carbon fibre specimens. The influence of re-referencing the temporal phase unwrapping algorithm after different time intervals is analyzed to reduce the random phase errors produced by speckle decorrelation and vibration.The performance of several phase shifting algorithms to minimize the influence of the vibration noise caused by the vacuum pump used to load the specimen is also investigated.2

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Section: Discussionmentioning

confidence: 99%

“…A high-speed speckle interferometry system based on this concept was recently developed by Huntley et al [6]. This system uses a digital video camera running at 1 kHz, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of sub-surface delaminations in carbon fibre composites using high-speed phase-shifted speckle interferometry and temporal phase unwrapping

Dávila

Ruiz

Kaufmann

et al. 2003

Optics and Lasers in Engineering

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“…On the other hand, when the number of samples is large, 23 10 10 N , we speak of temporal analysis methods [2][3][4][5][6] which have many problems with the interferogram borders and missing data, or are quadrature filters in an asymptotic way as in [6].…”

Section: Introductionmentioning

confidence: 99%

“…(1)] is the use of a running PSI method tuned at the carrier frequency [3][4][5][6][7]. For example if we use a tree step PSI method we could demodulate the phase locally for each of three consecutive samples.…”

Section: Introductionmentioning

confidence: 99%

Regularized least squares phase sampling interferometry

Quiroga¹,

Estrada²,

Servı́n³

et al. 2011

Opt. Express

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Abstract:In phase sampling interferometry, existing temporal analysis methods are sensitive to border effects and cannot deal with missing data. In this work we propose a quadrature filter that allows a reliable dynamic phase measurement for every sample, even in the cases involving few samples or missing data. The method is based on the use of a regularized least squares cost function that enforces the quadrature character of the filter. A comparison with existing techniques shows the effectiveness of the proposed method.

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Advances in Speckle Metrology

Joenathan

Sirohi

Bernal

2015

The Optics Encyclopedia

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The field of speckle metrology has seen a surge in development in the past 10 years owing to advancements in digital cameras and computing power. For instance, a variety of digital speckle correlation (DSC) processes can now be performed in almost real time and therefore speckle techniques has found applications in nondestructive testing (NDT), biology, and medicine. New techniques in terms of optical arrangements and in extracting phase data have been introduced for measuring out‐of‐plane and in‐plane motions in digital speckle interferometry (DSPI) and digital speckle shear interferometry (DSSPI). DSC, DSPI, and DSSPI have also been combined to extend the range of measurements. In addition, quantitative analysis in speckle interferometry has seen a plethora of new software developments for conducting real‐time, accurate, complicated, fast, and repeatable measurements with ease. In addition, different methods to process speckle fringes have made analysis equivalent to that of classical interferometry, yet can be applied to all types of real‐world specimen.

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Phase-shifted dynamic speckle pattern interferometry at 1 kHz

Cited by 98 publications

References 10 publications

Measurement of sub-surface delaminations in carbon fibre composites using high-speed phase-shifted speckle interferometry and temporal phase unwrapping

Measurement of sub-surface delaminations in carbon fibre composites using high-speed phase-shifted speckle interferometry and temporal phase unwrapping

Regularized least squares phase sampling interferometry

Advances in Speckle Metrology

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