Study of the Speckle of diffusing media
Objective
The analysis of the speckle field generated by a diffusing medium can potentially provide a wealth of information on this medium. Thus, in the absence of an imaging system between the medium and the observation plane, the characteristics of the speckle such as size, contrast, polarization and grain dynamics are all variables that are dependent on the diffusion properties and dynamics of the medium.
Application
Development of non-invasive exploration techniques for complex environments (biomedical, agri-food applications, etc.)
Participating members
Guy Le Brun, Fabrice Pellen, Bernard Le Jeune, Aicha El Cheikh (Doctoral student), Hadi Loutfi (Doctoral student), Gaël Le Roux (Technician)
Thesis
Hadi LOUTFI "Optical characterization by polarized speckle of protein crystals and spores synthesized by Bacillus thuringiensis". Thesis in co-supervision with the University of Saint Joseph of Beirut (Lebanon) started in October 2017.
Aicha EL CHEIKH "Applications of coherent optical methods for monitoring the properties of dental restorative materials". Thesis in co-supervision with the University of Saint Joseph of Beirut (Lebanon) started in October 2016.
Christelle ABOU NADER "Multiparameter approach to speckle field analysis and applications". Thesis in co-supervision with the University of Saint Joseph of Beirut (Lebanon) defended on 30/06/2016.
Rana NASSIF "Coherent optical methods for the study of biological environments: use of speckle phenomena, application to the study of fruit maturity and preservation". Thesis in co-supervision with Saint Joseph University of Beirut (Lebanon) defended on 9/07/2013.
Publications
C. Abou Nader, H. Loutfi, F. Pellen, B. Le Jeune, G. Le Brun, R. Lteif, M. Abboud, "Assessing white wine viscosity variation using polarized laser speckle: a promising alternative to wine sensory analysis".
Sensors, Volume 17, N°10, 2340, 2017.
C. Abou Nader, F. Pellen, H. Loutfi, R. Mansour, B. Le Jeune, G. Le Brun, M. Abboud, "Early diagnosis of teeth erosion using Polarized Laser Speckle Imaging".
Journal of Biomedical Optics, Volume 21, No. 7, pp. 071103-071103, 2016.
C. Abou Nader, F. Pellen, P. Roquefort, T. Aubry, B. Le Jeune, G. Le Brun, Marie Abboud, "Evaluation of low viscosities using temporal and spatial analysis of the speckle pattern".
Optics Letters, Vol. 41, No. 11, pp. 2521-2524, 2016.
C. Abou Nader, R. Nassif, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Influence of size, proportion, and absorption coefficient of spherical scatterers on the degree of light polarization and the grain size of speckle pattern".
Applied Optics, Vol. 54, No. 35, pp. 10369-10375, 2015.
R. Nassif, C. Abou Nader, J. Rahbani, F. Pellen, D. Salameh, R. Lteif, G. Le Brun, B. Le Jeune, M. Kallassy Awad, M. Abboud, "Characterization of Bacillus thuringienis parasporal crystals using laser speckle technique : effect of crystals concentration and dimension".
Applied Optics, Vol. 54, No. 12, pp. 3725-3731, 2015.
R. Nassif, C. Abou Nader, C. Afif, F. Pellen, G. Le Brun, B. Le Jeune, M. Abboud, "Detection of Golden apples' climacteric peak by laser biospeckle measurements".
Applied Optics, Vol. 53, No. 35, pp. 8276-8282, 2014.
This paper was also selected for publication in the "Virtual Journal for Biomedical Optics" (VJBO), which includes, every month, the best articles published in the biomedical field in journals published by OSA (Optical Society of America).
R. Nassif, C. Abou Nader, F. Pellen, G. Le Brun, M Abboud, B. Le Jeune, "Retrieving controlled motion parameters using two speckle pattern analysis techniques: spatiotemporal correlation and the temporal history speckle pattern".
Applied Optics, Vol. 52, No. 31, pp. 7564-7569, 2013.
R. Nassif, F. Pellen, C. Magné, B. Le Jeune, G. Le Brun, M. Abboud, "Scattering through fruits during ripening: laser speckle technique correlated to biochemical and fluorescence measurements".
Optics Express, Vol. 20, No. 21, pp. 23887-23897, 2012.
Communications
H. Loutfi, F. Pellen, B. Le Jeune, R. Lteif, M. Kallassy, G. Le Brun, M. Abboud, H. Badawi, "Speckle imaging for monitoring the growth kinetics of Bacillus thuringiensis".
Speckle 2018: VII International Conference on Speckle Metrology, Proc. SPIE 10834, 108341C, doi: 10.1117/12.2318678, 10-12 September 2018, Janów Podlaski (Poland).
A. El Cheikh, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Monitoring the hardening kinetics of glass-ionomer cements using temporal correlation of speckle patterns".
Speckle 2018: VII International Conference on Speckle Metrology, SPIE Proc. 10834, 108342V, doi: 10.1117/12.2318690, 10-12 September 2018, Janów Podlaski (Poland).
A. El Cheikh, V. Chevalier, M. Daou, L. Pino, S. Arbab, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Study of the degradation process of glass-ionomer cements by analysis of speckle field dynamics".
Speckle 2018: VII International Conference on Speckle Metrology, Proc. SPIE 10834, 108342U, doi:10.1117/12.2318693, 10-12 September 2018, Janów Podlaski (Poland).
A. El Cheikh, F. Pellen, G. Le Brun, B. Le Jeune, M. Abboud, "Real-time monitoring of the hardening phenomenon of dental restorative materials by speckle field analysis".
23rd LAAS International Science Conference, 6-7 April 2017, Beirut (Lebanon).
C. Abou Nader, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Polarized laser speckle imaging as a diagnosis tool".
22nd LAAS International Science Conference, 14-15 April 2016, Beirut (Lebanon).
C. Abou Nader, F. Pellen, P. Elies, B. Le Jeune, G. Le Brun, M. Abboud, "Early diagnosis of dental erosion by polarized speckle field".
Non-conventional optical imaging days, March 16, 2016, Paris.
R. Nassif, C. Abou Nader, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Real-time monitoring of corks' water absorption using laser speckle temporal correlation".
Speckle 2015. Sixth International Conference on Laser Speckle, August 24-26, 2015, Guanajuato, Mexico.
C. Abou Nader, R. Nassif, F. Pellen, G. Le Brun, M. Abboud, B. Le Jeune, "Analysis of the speckle pattern produced by mixtures of polystyrene microspheres: An attemp to explain fruits ripening process".
Speckle 2015. Sixth International Conference on Laser Speckle, August 24-26, 2015, Guanajuato, Mexico.
C. Abou Nader, R. Nassif, F. Pellen, G. Le Brun, M. Abboud, B. Le Jeune, "Effects of the characteristics of a diffusing medium on the polarized speckle: Influence of size, proportion of diffusers and absorption coefficient".
Optical Congress Brittany 2015, 6-9 July 2015, Rennes.
R. Nassif, C. Abou Nader, F. Pellen, G. Le Brun, M. Abboud, B. Le Jeune, "Determination of motion parameters using speckle patterns analysis techniques".
21st LAAS International Scientific Conference "Horizon 2020 : Scientific and Technological Advances", 15-17 April 2015, Beirut (Lebanon).
C. Abou Nader, R. Nassif, F. Pellen, G. Le Brun, M. Abboud, B. Le Jeune, "Analysis of the speckle pattern produced by mixtures of polystyrene microspheres: an explanation of light's behavior in turbid media".
21st LAAS International Scientific Conference "Horizon 2020 : Scientific and Technological Advances", 15-17 April 2015, Beirut (Lebanon).
R. Nassif, C. Abou Nader, J. Rahbany, F. Pellen, R. Lteif, G. Le Brun, B. Le Jeune, M. Kallassy Awad, M. Abboud, "Characterization of Bacillus thuringiensis parasporal crystals using laser speckle technique".
21st LAAS International Scientific Conference "Horizon 2020 : Scientific and Technological Advances", 15-17 April 2015, Beirut (Lebanon).
R. Nassif, C. Abou Nader, M. Abboud, F. Pellen, G. Le Brun, B. Le Jeune, "Exploitation conjointe du speckle et de la polarisation pour le suivi de la maturation des fruits climactériques".
EPOS 2013 Day, 19 November 2013, Marseille.
R. Nassif, G. Hajj, J. Rahbani, M. Kalassy, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Characterization of Bacillus Thuringiensis crystals by speckle imaging".
Speckle 2012, 10-12 September 2012, Vigo (Spain).
R. Nassif, F. Pellen, B. Le Jeune, G. Le Brun, M. Abboud, "Laser speckle dynamic for monitoring fruits maturation".
Speckle 2012, 10-12 September 2012, Vigo (Spain).
Collaborations
The team is coordinator of the European project ERANETMED 2017-2020 (ANR funding) "BIOSMAN" (Towards real-time monitoring of Bacillus thuringiensis biopesticides production using laser Speckle imaging within a Mediterranean area network). This project is being carried out in collaboration with the Biotechnology Centre of Sfax (Tunisia) and the Laboratory of Biophotonics and Ionizing Radiation of Saint Joseph University in Beirut (Lebanon). This project aims to develop an optical method for monitoring biopesticide production. More precisely, it is a question of using the polarized speckle to image and study the protein crystals produced by the Bacillus thuringiensis bacteria during sporulation.
The team participated (2014-2015) in the Hubert Currien CEDRE Partnership (international collaboration program) entitled "Non-invasive optical imaging of biological structures by speckle field analysis and applications".
