Speckle Pattern Acquisition and Statistical Processing for Analysis of Turbid Liquids
Open Access
- 26 June 2023
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 72 (00189456) , 1-4
Abstract
Analysis and fine distinction of turbid fluids is challenging since standard techniques, usually applied to transparent liquids, fail to work properly due to scattering losses. The phenomenon of speckle pattern, which arises when such liquids are illuminated by coherent light, can be successfully applied to investigate the properties of these media. In this work, we exploit a simple instrumental configuration, combining a laser diode and a PC-interfaced, digital CMOS camera, for acquiring images and video of speckle pattern generated by illuminating turbid fluid samples that were obtained by dilution of opaque suspensions, such as commercial vegetable milk. By processing the acquired image sequences, we have been able to extract several statistical parameters that can be correlated with the concentration of the scattering elements of each sample, allowing an easy differentiation of the various fluids.Keywords
Funding Information
- Fellowship through the Company Fluid-o-Tech, Corsico, MI, Italy
This publication has 21 references indexed in Scilit:
- Laser speckle contrast imaging: theoretical and practical limitationsJournal of Biomedical Optics, 2013
- Laser speckle contrast imaging in biomedical opticsJournal of Biomedical Optics, 2010
- Rayleigh, Mie, and Tyndall scatterings of polystyrene microspheres in water: Wavelength, size, and angle dependencesJournal of Applied Physics, 2009
- Particle sizes and stability of UHT bovine, cereal and grain milksFood Hydrocolloids, 2003
- Bio-speckle assessment of bruising in fruitsOptics and Lasers in Engineering, 2003
- Invisible liposomes: Refractive index matching with sucrose enables flow dichroism assessment of peptide orientation in lipid vesicle membraneProceedings of the National Academy of Sciences, 2002
- Self-mixing laser speckle velocimeter for blood flow measurementIEEE Transactions on Instrumentation and Measurement, 2000
- Roughness measurement of metallic surfaces based on the laser speckle contrast methodOptics and Lasers in Engineering, 1998
- Laser speckle velocimeter using self-mixing laser diodeIEEE Transactions on Instrumentation and Measurement, 1996
- Evaluation of blood flow by laser speckle image sensing Part 1Applied Optics, 1987