Mr. Matias R. Viotti Profile

Matias R. Viotti

Researcher at IHR

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 21 June 2019 Paper

Sensitivity of an image-plane digital holography interferometer for the measurement of pile-up

Matias Viotti, Armando Albertazzi, Denis Boing, Rodrigo Blödorn

Proceedings Volume 11056, 1105649 (2019) https://doi.org/10.1117/12.2526002

KEYWORDS: Interferometers, Digital holography, Phase measurement, Spherical lenses, Holograms, 3D metrology, Microscopes, CCD image sensors, Helium neon lasers, Collimation

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Proceedings Article | 24 May 2018 Paper

Speckle Interferometry in harsh environments: design considerations and successful examples

A. Albertazzi, M. Viotti, F. Silva, C. Veiga, E. S. Barrera, M. Benedet, A. Fantin, D. Willemann

Proceedings Volume 10678, 1067802 (2018) https://doi.org/10.1117/12.2317941

KEYWORDS: General applications engineering, Interferometers, Speckle, Speckle interferometry, Shearography, Speckle pattern, Optical components, Diffraction

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Mechanical vibrations, air and thermal instabilities are among the most disturbing agents that make difficult or impossible a successful speckle interferometry measurement in harsh environments. Usually, they destroy the interference signal or, at least, dramatically reduce the interference signal quality, what raises the measurement uncertainty to unacceptable levels. Understanding the effects of disturbing agents on speckle interferometry is a first step towards finding strategies to perform effective measurements in harsh environments. There are three main strategies to successfully measure under unfavorable conditions: isolation, robustness and both. By isolation, we mean ways to avoid the action of the disturbing agents on the speckle interferometer and on the measurand. By robustness, we mean using a robust mechanical design, a robust optical technique, a robust data reduction algorithm and/or a robust configuration that is not much disturbed by mechanical, thermal or air instabilities. Compactness, high stiffness, robust mechanical design and an effective clamping system are very important considerations to minimize the influence of mechanical vibrations. One-shot measurement and averaging are also robust strategies to minimize the negative effects of mechanical vibrations as well as air and thermal instabilities. Protective enclosures are useful solutions for reducing air instabilities effects, but sometimes ineffective for achieving thermal stability outside the lab. Robust optical techniques are perhaps the most effective way to reduce the effects of thermal dilatation. The paper describes these concepts and discusses four speckle interferometry systems developed and successfully used by the authors in harsh environments: An achromatic speckle interferometer, using a diffractive optical element, was developed and has been applied to in-situ measure of residual stresses in pipelines. The second and third systems are compact and attachable shearography systems for in-field testing of the adhesion of joints of composite material pipes. Finally, the fourth system is a configuration of a shearography system using two apertures to produce carrier fringes for the measurement from a single image for each loading stage.

Proceedings Article | 28 August 2016 Presentation + Paper

A non-linear piezoelectric actuator calibration using N-dimensional Lissajous figure

A. Albertazzi, M. Viotti, C. L. Veiga, A. Fantin

Proceedings Volume 9960, 99600L (2016) https://doi.org/10.1117/12.2237367

KEYWORDS: Phase shifting, Calibration, Phase shifts, Actuators, Interferometry, Ferroelectric materials, Sensors, Feedback control, Ions, Mirrors

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Proceedings Article | 24 August 2015 Paper

Bending moment evaluation of a long specimen using a radial speckle pattern interferometer in combination with relaxation methods

Anderson Pacheco, Filipe Fontana, Matias Viotti, Celso Veiga, Lívia Lothhammer, Armando Albertazzi G. Jr.

Proceedings Volume 9660, 966006 (2015) https://doi.org/10.1117/12.2189321

KEYWORDS: Ions, Neodymium, Interferometers, Calibration, Mirrors, Speckle pattern, Data modeling, Diffractive optical elements, Digital signal processing, Speckle

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Proceedings Article | 22 June 2015 Paper

Bending stress determination in pipes using a radial in-plane digital speckle pattern interferometer combined with instrumented indentation

Filipe Fontana, Matias Viotti, Armando Albertazzi G. Jr.

Proceedings Volume 9525, 95250V (2015) https://doi.org/10.1117/12.2184732

KEYWORDS: Interferometers, Diffractive optical elements, Mirrors, Speckle pattern, Interferometry, Actuators, Phase shift keying, Phase measurement, Computing systems, Ferroelectric materials

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Proceedings Article | 22 June 2015 Paper

Robust speckle metrology for stress measurements outside the lab

Matias Viotti, Armando Albertazzi G. Jr.

Proceedings Volume 9525, 95250T (2015) https://doi.org/10.1117/12.2184739

KEYWORDS: Interferometers, Mirrors, Speckle, Sensors, Photography, Diffractive optical elements, Semiconductor lasers, Interferometry, Nondestructive evaluation, Speckle metrology

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SPIE Press Book | 7 October 2014

Robust Speckle Metrology Techniques for Stress Analysis and NDT

Matias Viotti, Armando Albertazzi

KEYWORDS: Interferometers, Speckle, Nondestructive evaluation, Interferometry, Mirrors, Cameras, Shearography, Inspection, Speckle pattern, Digital image correlation

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Robust Speckle Metrology Techniques for Stress Analysis and NDT

Proceedings Article | 13 May 2013 Paper

A computational tool to highlight anomalies on shearographic images in optical flaw detection

A. Fantin, D. Willemann, M. Viotti, A. Albertazzi

Proceedings Volume 8788, 87880L (2013) https://doi.org/10.1117/12.2020978

KEYWORDS: Shearography, Inspection, Image processing, Nondestructive evaluation, Composites, Fringe analysis, Damage detection, Visualization, Interferometry, Holography

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Proceedings Article | 13 May 2013 Paper

Measurement of residual stress fields in FHPP welding: a comparison between DSPI combined with hole-drilling and neutron diffraction

Matias Viotti, Armando Albertazzi, Peter Staron, Marcelo Pisa

Proceedings Volume 8788, 87882X (2013) https://doi.org/10.1117/12.2020960

KEYWORDS: Diffraction, Diffractive optical elements, Mirrors, Speckle pattern, Measurement devices, Neodymium, Interferometry, Kinematics, Collimation, Ferroelectric materials

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SPIE Journal Paper | 7 May 2013

Compact sensor combining digital speckle pattern interferometry and the hole-drilling technique to measure nonuniform residual stress fields

Matias Viotti, Armando Albertazzi

OE, Vol. 52, Issue 10, 101905, (May 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.10.101905

KEYWORDS: Diffractive optical elements, Sensors, Interferometry, Speckle pattern, Seaborgium, Mirrors, Phase measurement, Optical engineering, Interferometers, Kinematics

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Proceedings Article | 13 September 2012 Paper

Image quality improvement of an achromatic DSPI interferometer

Matias Viotti, Armando Albertazzi G.

Proceedings Volume 8493, 84930Z (2012) https://doi.org/10.1117/12.930499

KEYWORDS: Diffractive optical elements, Semiconductor lasers, Modulation, Phase shift keying, Image quality, Interferometers, Laser sources, Speckle, Mirrors, Polarizers

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Proceedings Article | 11 September 2012 Paper

Compact sensor combining DSPI and the hole-drilling technique to measure non-uniform residual stress fields

Matias Viotti, Armando Albertazzi

Proceedings Volume 8413, 841310 (2012) https://doi.org/10.1117/12.978183

KEYWORDS: Diffractive optical elements, Mirrors, Phase measurement, Interferometers, Sensors, Kinematics, Ferroelectric materials, Speckle pattern, Interferometry, Speckle

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Proceedings Article | 27 May 2011 Paper

Simultaneous out-of-plane and in-plane displacements measurement by using digital holography around a hole or indentation

Matias Viotti, Christian Kohler, Armando Albertazzi

Proceedings Volume 8082, 80820E (2011) https://doi.org/10.1117/12.889318

KEYWORDS: Holograms, Digital holography, Mirrors, Diffractive optical elements, Cameras, Phase measurement, Speckle, Prototyping, Spherical lenses, Wavefronts

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Proceedings Article | 14 September 2010 Paper

Radial speckle interferometry combined with a microindentation test to analyze coating adhesion

L. Tendela, M. Viotti, A. Albertazzi Gonçalves, G. Kaufmann

Proceedings Volume 7387, 738720 (2010) https://doi.org/10.1117/12.867643

KEYWORDS: Coating, Speckle, Interferometers, Interfaces, Diffractive optical elements, Polishing, Diffraction, Mirrors, Spherical lenses, Epoxies

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Proceedings Article | 14 September 2010 Paper

A portable optical DSPI strain sensor with radial sensitivity using an axis-symmetrical DOE

Matias Viotti, Walter Kapp, Armando Albertazzi Gonçalves

Proceedings Volume 7387, 73870B (2010) https://doi.org/10.1117/12.869665

KEYWORDS: Diffractive optical elements, Sensors, Mirrors, Interferometers, Diffraction, Optical components, Semiconductor lasers, Collimation, Ferroelectric materials, Speckle pattern

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Proceedings Article | 14 September 2010 Paper

Digital holographic measurement system for high-speed three-dimensional deformation measurements

Christian Kohler, Matias Viotti, Armando Albertazzi Gonçalves

Proceedings Volume 7387, 73870T (2010) https://doi.org/10.1117/12.871951

KEYWORDS: Holograms, Cameras, Digital holography, Diffractive optical elements, Holography, Metals, Mirrors, Light sources, Wavefronts, Beam splitters

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Proceedings Article | 2 August 2010 Paper

Performance evaluation of a radial in-plane digital speckle pattern interferometer using a diffractive optical element for residual stress measurement

A. Albertazzi, M. Viotti, W. Kapp

Proceedings Volume 7791, 77910G (2010) https://doi.org/10.1117/12.861153

KEYWORDS: Diffractive optical elements, Interferometers, Diffraction, Mirrors, Speckle pattern, Diffraction gratings, Collimation, Digital signal processing, Semiconductor lasers, Computing systems

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Proceedings Article | 17 June 2009 Paper

Industrial inspections by speckle interferometry: general requirements and a case study

Matias Viotti, Armando Albertazzi G.

Proceedings Volume 7389, 73890G (2009) https://doi.org/10.1117/12.827585

KEYWORDS: Interferometers, Diffractive optical elements, Speckle, Mirrors, Kinematics, Diffraction, Inspection, Semiconductor lasers, Speckle interferometry, Speckle pattern

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Proceedings Article | 3 October 2008 Paper

A radial in-plane DSPI interferometer using diffractive optics for residual stresses measurement

Armando Albertazzi G., Matias Viotti, Walter Kapp

Proceedings Volume 7155, 715525 (2008) https://doi.org/10.1117/12.814579

KEYWORDS: Diffractive optical elements, Interferometers, Diffraction, Mirrors, Binary data, Optical components, Semiconductor lasers, Diffraction gratings, Speckle pattern, Light sources

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Proceedings Article | 11 August 2008 Paper

Applications of a white light interferometer for wear measurement of cylinders

A. Albertazzi G., M. Viotti, R. Miggiorin, A. Dal Pont

Proceedings Volume 7064, 70640B (2008) https://doi.org/10.1117/12.796058

KEYWORDS: Clouds, Mirrors, Interferometers, Mathematical modeling, Computer simulations, Collimation, Optical testing, Beam shaping, Data modeling, Beam splitters

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Proceedings Article | 18 June 2007 Paper

A novel algorithm to stitch adjacent cloud of points of long cylindrical surfaces

M. Viotti, A. Albertazzi, A. Dal Pont, A. Fantin

Proceedings Volume 6616, 66161E (2007) https://doi.org/10.1117/12.726166

KEYWORDS: Clouds, Mirrors, Interferometers, Computer simulations, Optical testing, Optical interferometry, Beam splitters, Collimation, Fringe analysis, Metrology

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Proceedings Article | 14 August 2006 Paper

A white-light interferometer for inner cylindrical surfaces

A. Albertazzi G., M. Viotti, A. Dal Pont

Proceedings Volume 6293, 62930F (2006) https://doi.org/10.1117/12.678050

KEYWORDS: Interferometers, Mirrors, Collimation, Calibration, Beam splitters, Optical testing, Digital cameras, Error analysis, Light sources, Optical alignment

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SPIE Journal Paper | 1 September 2005

Measurement of residual stresses using local heating and a radial in-plane speckle interferometer

Matías Viotti, Armando Albertazzi Gonçalves, Guillermo Kaufmann

OE, Vol. 44, Issue 09, 093606, (September 2005) https://doi.org/10.1117/12.10.1117/1.2050307

KEYWORDS: Interferometers, Speckle, Mirrors, Chemical elements, Optical engineering, Finite element methods, Aluminum, Interfaces, Numerical analysis, Fringe analysis

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Proceedings Article | 14 February 2005 Paper

Measurement of residual stresses using a radial in-plane digital speckle pattern interferometer and local heating: recent advances

Matías Viotti, Armando Albertazzi Gonçalves, Guillermo Kaufmann

Proceedings Volume 5776, (2005) https://doi.org/10.1117/12.611743

KEYWORDS: Interferometers, Mirrors, Speckle pattern, Finite element methods, Speckle, Chemical elements, Interfaces, Interferometry, Fringe analysis, Collimation

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Proceedings Article | 21 October 2004 Paper

Determination of residual stresses by means of a digital speckle pattern interferometry and local heating combined technique

Matias Viotti, Guillermo Kaufmann, E. Fancello, A. Gaston, O. Moeller

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.591609

KEYWORDS: Finite element methods, Speckle pattern, Interferometry, Interferometers, Carbon dioxide lasers, Chemical elements, Nondestructive evaluation, Fringe analysis, 3D modeling, Aluminum

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Proceedings Article | 2 August 2004 Paper

Flaw detection using temporal speckle pattern interferometry and thermal waves

Guillermo Kaufmann, Matias Viotti, Gustavo Galizzi

Proceedings Volume 5532, (2004) https://doi.org/10.1117/12.555767

KEYWORDS: Gas lasers, Speckle pattern, Interferometry, Aluminum, Modulation, Carbon monoxide, Speckle, Phase measurement, Beam splitters, Defect detection

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Proceedings Article | 30 May 2003 Paper

Residual stress measurement using a radial in-plane speckle interferometer and laser annealing: preliminary results

Matias Viotti, Ricardo Suterio, Armando Albertazzi, Guillermo Kaufmann

Proceedings Volume 5144, (2003) https://doi.org/10.1117/12.488195

KEYWORDS: Interferometers, Annealing, Mirrors, Speckle, Phase shift keying, Nondestructive evaluation, Fringe analysis, Gas lasers, Laser interferometry, Speckle pattern

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Showing 5 of 27 publications

Conference Committee Involvement (1)

Speckle 2010: speckle fields forever

13 September 2010 |

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