Work topics
- Development of numerical models to characterize the dynamic speckle.
- Development of measurement methods of optical activity by using speckle.
- Study of biological and industrial processes by using speckle techniques.
Latest works
- Dynamic speckle imaging with low cost devices.
M. Vannoni, M. Trivi, R. Arizaga,
H. Rabal, G. Molesini.
European Jounal of Physics. In Press.
- Differentation of the drying time of paints by dynamic speckle
P.A. Faccia, O.R. Pardini, J.I. Amalvy, N. Cap, E.E Grumel, R. Arizaga, M. Trivi.
Progress in Organic Coating. In Press.
- Dynamic speckle algorithms comparison using receiver operating characteristic.
C. Ortiz, G. H. Sendra, R. Arizaga, H.J. Rabal, M. Trivi.
Optical Engineering. 47, 057005, (2008).
- Characterization of dynamic speckles by Difference Histogram Method
A. Mavilio Nuñez, M. Fernandez Limia, M. Taño Lazo, H. J. Rabal, R. Arizaga, M. Trivi Opt. Eng 46, 057005, (2007).
- Reliability of biospeckle image analysis
R. Braga, B. Oliveira Silva, G. Rabelo, R. Marques Costa, A. Machado Enes, N. Cap, H. Rabal, R. Arizaga, M. Trivi, G. Horgan
Optics and Laser in Engineering. 45,
390-395 (2007).
- Speckle activity images based in the spatial variance of the phase
H. Rabal, N. Cap, M. Trivi, R. Arizaga, A. Federico, G. E. Galizzi, G. H. Kaufmann
Applied Optics. 45, 8733-8738, (2006).
- Simulation of dynamic speckle sequences and its application to the analysis of transient processes
A. Federico, G. H. Kaufmann, G. E. Galizzi, H. Rabal, M. Trivi, R. Arizaga
Optics Communications. 260, 493-499 (2006).
- Detection of fungi in beans by the laser biospeckle technique
R. Braga, G. Rabelo, L. Granato, E. Santos, J. Machado, R. Arizaga, H. Rabal, M. Trivi
Biosystems Engineering. 91, 465-469 (2005).
- Local correlation in dynamic speckle
B. Ruiz, N. Cap H. Rabal
Opt. Commun.245, 103-111. (2005).
- Biospeckle images decomposition in temporary spectral bands
G. H. Sendra, H.J. Rabal, R. Arizaga, M. Trivi
Optics Letters. 30, 1641-1643,
(2005)
- Dynamic speckle processing using wavelets based entropy
I. Passoni, A.
Dai Pra, H. Rabal, M. Trivi, R. Arizaga
Optics Communications. 246,
219-228, (2005).
- Speckle interferometry applied to pharmacodynamics studies: evaluation of parasite motility
J. A. Pomarico, H. O. Di Rocco, L. Alvarez, C. Lanusse, L, Mottier, C. Saumell, H. J. Rabal, R. Arizaga, M. Trivi
European Biophysics Journal, 33, 694-699
(2004).
- Numerical model for dynamic speckle: an approach using the movement of scatterers
H. J. Rabal, R. Arizaga, N. Cap, E. Grumel, M. Trivi
Journal of Optics A: Pure and Applied Optics. 5, S381- S385, (2003).
- Bio-speckle assessment of bruising in fruits
M. Pajuelo, G.
Baldwin, R. Arizaga, N. Cap, H. Rabal, M.Trivi
Optics and Laser
in Engineering.40, 13-24, (2003).
Collaboration with other institutions and Research groups
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Facultad Ingeniería U.N. Mar del Plata
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Facultad Ciencias Exactas y Veterinaria U.N. Centro (Tandil)
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Grupo Laser U. Salta.
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IFIR, U.N. Rosario.
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INTA.
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INTI.
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Universidad Federal de Lavras (Brasil).
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U. San Pablo (Brasil).
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UdeAntioquia (Colombia).
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Pontificia Universidad Católica de Perú (Perú).
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Istituto Nazionale di Ottica Applicata (Italia).
Available equipment
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An antivibration table. Newport RC
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2 He-Ne lasers. Melles Griot (10 mW)
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Several precision optical components (divisores, polariser, mirrors, lenses, etc.)
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An image processor. Imaging Technology, series 151
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An image processor. Matrox Pulsar.
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A high-precision Piezoelectric positioner with command console. New Focus, Optic Claw.
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A video Printer. Sony.
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2 video CCD cameras. Pulnix 765.
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