Holographic interferometry for the study of liquids

Colombani, Jean; Bert, J

doi:10.1016/j.molliq.2006.12.013

Cited by 28 publications

(9 citation statements)

References 24 publications

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“…One of the most important advantages of digital interferometry is the suppression of the optical defects of the apparatus, e.g., possible defects found in the mirrors, prisms, or Soret cell walls. This same advantage is found in the more conventional holographic interferometry, 51 where the defects are suppressed by initially recording the interference pattern of the test beam and reference beam in a holographic plate, and then illuminating the same plate only with the test beam. In contrast, in digital interferometry an initial phase-shifted data is recorded with the Soret cell filled with a liquid of constant refractive index (i.e., homogeneous liquid without temperature or concentration gradients), which will be subsequently subtracted from the phase difference acquired during the thermodiffusion experiment.…”

Section: Ccd Sensorsmentioning

confidence: 82%

Measurement of Soret and Fickian diffusion coefficients by orthogonal phase-shifting interferometry and its application to protein aqueous solutions

Torres

Komiya

Henry

et al. 2013

The Journal of Chemical Physics

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We have developed a method to measure thermodiffusion and Fickian diffusion in transparent binary solutions. The measuring instrument consists of two orthogonally aligned phase-shifting interferometers coupled with a single rotating polarizer. This high-resolution interferometer, initially developed to measure isothermal diffusion coefficients in liquid systems [J. F. Torres, A. Komiya, E. Shoji, J. Okajima, and S. Maruyama, Opt. Lasers Eng. 50, 1287 (2012)], was modified to measure transient concentration profiles in binary solutions subject to a linear temperature gradient. A convectionless thermodiffusion field was created in a binary solution sample that is placed inside a Soret cell. This cell consists of a parallelepiped cavity with a horizontal cross-section area of 10 × 20 mm(2), a variable height of 1-2 mm, and transparent lateral walls. The small height of the cell reduces the volume of the sample, shortens the measurement time, and increases the hydrodynamic stability of the system. An additional free diffusion experiment with the same optical apparatus provides the so-called contrast factors that relate the unwrapped phase and concentration gradients, i.e., the measurement technique is independent and robust. The Soret coefficient is determined from the concentration and temperature differences between the upper and lower boundaries measured by the interferometer and thermocouples, respectively. The Fickian diffusion coefficient is obtained by fitting a numerical solution to the experimental concentration profile. The method is validated through the measurement of thermodiffusion in the well-known liquid pairs of ethanol-water (ethanol 39.12 wt.%) and isobutylbenzene-dodecane (50.0 wt.%). The obtained coefficients agree with the literature values within 5.0%. Finally, the developed technique is applied to visualize biomolecular thermophoresis. Two protein aqueous solutions at 3 mg∕ml were used as samples: aprotinin (6.5 kDa)-water and lysozyme (14.3 kDa)-water. It was found that the former protein molecules are thermophilic and the latter thermophobic. In contrast to previously reported methods, this technique is suitable for both short time and negative Soret coefficient measurements.

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Section: Ccd Sensorsmentioning

confidence: 82%

Measurement of Soret and Fickian diffusion coefficients by orthogonal phase-shifting interferometry and its application to protein aqueous solutions

Torres

Komiya

Henry

et al. 2013

The Journal of Chemical Physics

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“…The liquid samples were prepared by mixing distilled water ( O ). Then, the distribution of the concentration difference between the mixtures can be calculated using (13). The values of CON and n of these last two solutions were obtained from [1] and [20].…”

Section: Resultsmentioning

confidence: 99%

“…By employing (13), the full-field distribution of the concentration difference in a glass tube can be calculated and visualized.…”

mentioning

confidence: 99%

Measurements of Concentration differences between Liquid Mixtures using Digital Holographic Interferometry

Guerrero-Méndez¹,

Saucedo-Anaya²,

Araiza-Esquivel³

et al. 2017

Metrology and Measurement Systems

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We present an alternative method to detect and measure the concentration changes in liquid solutions. The method uses Digital Holographic Interferometry (DHI) and is based on measuring refractive index variations. The first hologram is recorded when a wavefront from light comes across an ordinary cylindrical glass container filled with a liquid solution. The second hologram is recorded after slight changing the liquid's concentration. Differences in phase obtained from the correlation of the first hologram with the second one provide information about the refractive index variation, which is directly related to the changes in physical properties related to the concentration. The method can be used − with high sensitivity, accuracy, and speed − either to detect adulterations or to measure a slight change of concentration in the order of 0.001 moles which is equivalent to a difference of 0.003 g of sodium chloride in solutions. The method also enables to measure and calculate the phase difference among each pixel of two samples. This makes it possible to generate a global measurement of the phase difference of the entire sensed region.

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“…This is because this process, termed as thermodiffusion or the Soret effect, occurs at a very small scale when compared to the convective motion induced by the earth's gravitational force, for instance. Thus, while experimental approaches such as the thermogravitational column [1], diffusion cell [2], thermal flow field fractionation [3], thermal diffusion forced Rayleigh scattering [4], laser-beam deflection [5], holographic interferometry [6] as well as light scattering [7] exist to investigate the thermodiffusion process on earth, all of them except the thermogravitational column method are constantly challenged by their ability to completely isolate the natural convective forces on earth. In the thermogravitational method, convection is used to enhance separation.…”

Section: Introductionmentioning

confidence: 99%

Thermo-solutal-diffusion in high pressure liquid mixtures in the presence of micro-vibrations

Srinivasan

Dejmek

Saghir

2010

International Journal of Thermal Sciences

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Holographic interferometry for the study of liquids

Cited by 28 publications

References 24 publications

Measurement of Soret and Fickian diffusion coefficients by orthogonal phase-shifting interferometry and its application to protein aqueous solutions

Measurement of Soret and Fickian diffusion coefficients by orthogonal phase-shifting interferometry and its application to protein aqueous solutions

Measurements of Concentration differences between Liquid Mixtures using Digital Holographic Interferometry

Thermo-solutal-diffusion in high pressure liquid mixtures in the presence of micro-vibrations

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