Displacement measurements over a square meter area using digital holographic interferometry

Torre-Ibarra, Manuel De la; Moreno, Jorge Mauricio Flores; Aguayo, Daniel D.; Hernández-Montes, María del Socorro; Pérez-López, Carlos; Santoyo, Fernando Mendoza

doi:10.1117/1.oe.53.9.092009

Cited by 13 publications

(2 citation statements)

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“…Digital holographic interferometry (DHI) is a high-resolution quantitative imaging method to extract the optical phase changes in light and has been widely used for NDT (Pryputniewicz, 1988;Newman, 2005;Ganesan, 2009), measurement of micro-to nanoscale displacements (Rastogi, 2013;De la Torre Ibarra et al, 2014;Hernández-Montes et al, 2020), vibrations (Pryputniewicz, 1985;Picart et al, 2005), and fluid mechanics (Cubreli et al, 2021;Psota et al, 2023), among other applications and physical phenomena. Conventional DHI methods, such as Electro Speckle Pattern Interferometry (ESPI) and Stetson holographic interferometry, use the use of lens components to relay the optical information of interest onto a recording media, in most cases a camera sensor.…”

Section: Introductionmentioning

confidence: 99%

High-resolution imaging for in-situ non-destructive testing by quantitative lensless digital holography

Ruiz-Cadalso,

Furlong

2024

Front. Photon.

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Quantitative imaging technologies for in-situ non-destructive testing (NDT) demand high-resolution, wide-field, and stable metrology capabilities. Moreover, live processing and automation are vital for real-time quality control and inspection. Conventional methods use complex optical setups, resulting in large, immobile systems which can solely operate within controlled environmental conditions due to temporal instabilities, rendering them unsuitable for in-situ measurements of micro-to nano-scale physical phenomena. This article delves into the multiphysics application of lensless digital holography, emphasizing its metrological capacity for various in-situ scenarios, while acknowledging and characterizing the differing constraints imposed by various physical phenomena, both transient and steady-state. The digital reconstruction of holograms is computed in real-time, and numerical focusing capabilities allow for instantaneous retrieval of the optical phase at various working distances without the need of complex optical setups, making lensless digital holography well-suited for in-situ quantitative imaging under various types of environments. Current NDT capabilities are demonstrated, including high-resolution and real-time reconstructions, simultaneous measurements for comparative metrology, and practical applications ranging from vibrations and acoustics to thermo-mechanics. Furthermore, methodologies to enhance overall metrology capabilities are exploited, addressing the study of existing physical phenomena, thereby expanding the applicability of holographic techniques across diverse industrial sectors.

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Section: Introductionmentioning

confidence: 99%

High-resolution imaging for in-situ non-destructive testing by quantitative lensless digital holography

Ruiz-Cadalso,

Furlong

2024

Front. Photon.

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“…Advanced systems overcome the vibration problem by using very high speed cameras and high power lasers [23], [24]. A further way for reducing the sensitivity to external perturbations consists on utilizing long wave radiation, in the IR region 1551-319X © 2015 IEEE.…”

Section: Introductionmentioning

confidence: 99%

Automatic Frames Extraction and Visualization From Noisy Fringe Sequences for Data Recovering in a Portable Digital Speckle Pattern Interferometer for NDI

Memmolo

Arena²,

Fatigati

et al. 2015

J. Display Technol.

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We report on a method for recovering data from a simple portable Digital Speckle Pattern Interferometer, we used for monitoring structural behavior of a painting on wood, hanging on a wall, outside of laboratory conditions, without anti-vibration devices. In such a situation, fringes produced by the object displacements were affected by unpredictable distortions caused by environment vibrations. However, an sufficient number of suitable, i.e., undistorted or barely distorted, fringe patterns usable for processing was found. We performed multiple acquisitions at a frame rate as high as possible. The main task was picking out usable interferograms from large amount of frames. We developed a PC-based method based on jointly analysis of spectral content and fringe image sharpness as selection rules. The selected frames were utilized for off-line processing by using an approach based on Hilbert Transform and Phase Unwrapping via MAx-flow (PUMA) algorithm. We obtained a collection of displacement-maps, that allowed for evaluating the whole structure deformations, caused by environmental thermo-hygrometric fluctuations.

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Laser speckle based digital optical methods in structural mechanics: A review

Torre

Montes

Flores-Moreno

et al. 2016

Optics and Lasers in Engineering

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Displacement measurements over a square meter area using digital holographic interferometry

Cited by 13 publications

References 0 publications

High-resolution imaging for in-situ non-destructive testing by quantitative lensless digital holography

High-resolution imaging for in-situ non-destructive testing by quantitative lensless digital holography

Automatic Frames Extraction and Visualization From Noisy Fringe Sequences for Data Recovering in a Portable Digital Speckle Pattern Interferometer for NDI

Laser speckle based digital optical methods in structural mechanics: A review

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