Study of Large Scale Fluctuations in Turbid Media by Photon-Density-Wave Fluctuation Correlation Spectroscopy

Toronov, Vladislav; Filiaci, M.; Fantini, Sergio; Gratton, Enrico

doi:10.1364/aoipm.1998.asub7

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Information on spatial coherence can be obtained by calculating cross-correlation spectra of signals measured in different locations [3]. The correlation analysis of the signals acquired simultaneously on the arm and the brain cortex confirms the connection between exercise and cerebral optical signals.…”

Section: Resultsmentioning

confidence: 63%

Exploring tissue dynamics by photon-density-wave fluctuation correlation spectroscopy

et al. 1999

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Section: Resultsmentioning

confidence: 63%

Exploring tissue dynamics by photon-density-wave fluctuation correlation spectroscopy

et al. 1999

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“…Multiple light scattering in the NIR range can also be informative, in particular for the monitoring of milk fermentation [28]. For the analysis of particle size and concentration in dense media, including food stuffs, instruments are offered that employ methods such as photon density wave (PDW) spectroscopy [29][30][31] and static multiple light scattering (SMLS) [32][33][34], but they are configured to work with closed cuvettes and a small set of scattering angles. We propose a somewhat new approach to the light scattering diagnostics of turbid media such as milk, which consists of tracking changes in the shape of the angular distribution of the scattered light intensity (scattering indicatrix), being measured in a wide range of scattering angles from forward-to backscatter, due to changes in the content of milk components such as fat and large-scale impurities (in milk, this role is played by somatic cells).…”

Section: Introductionmentioning

confidence: 99%

A Monoblock Light-Scattering Milk Fat Percentage and Somatic Cell Count Sensor for Use in Milking Systems

Shkirin,

Astashev,

Ignatenko

et al. 2023

Sensors

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A monoblock light-scattering sensor, which is capable of measuring the fat content of milk and indicating the excess by which the somatic cell count (SCC) is over the permissible level, has been developed for installation in dairy systems. In order for the sensor to perform measurements when the milking machine is working in the “milk plug” mode, a flow-through unit is designed in the form of a pipe with a lateral cylindrical branch, in which milk accumulates so as to eliminate large bubbles and achieve continuity of the milk flow. The operation of the sensor is based on the registration of the angular intensity distribution of light scattered in the transparent cylindrical segment of the tube branch. A semiconductor laser with a wavelength of 650 nm is used as a light source for determining scattering in milk. The angular distribution of the scattered light intensity (scattering indicatrix) is recorded using an axial photodiode array. The fat content is determined by the average slope of the measured scattering indicatrix in the range of scattering angles 72–162°. The SCC level is estimated from the relative deviation of the forward scatter intensity normalized to the backscatter intensity with respect to uninfected milk. The sensor has been tested on a Yolochka-type milking machine.

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Study of Large Scale Fluctuations in Turbid Media by Photon-Density-Wave Fluctuation Correlation Spectroscopy

Cited by 2 publications

References 2 publications

Exploring tissue dynamics by photon-density-wave fluctuation correlation spectroscopy

Exploring tissue dynamics by photon-density-wave fluctuation correlation spectroscopy

A Monoblock Light-Scattering Milk Fat Percentage and Somatic Cell Count Sensor for Use in Milking Systems

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