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Metrology and Measurement Systems

The Journal of Committee on Metrology and Scientific Instrumentation of Polish Academy of Sciences

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Volume 24, Issue 1 (Mar 2017)

Measurements of Concentration differences between Liquid Mixtures using Digital Holographic Interferometry

Carlos Guerrero-Méndez
  • Corresponding author
  • 1) Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería Eléctrica, Ramón López Velarde 801, C.P. 98000, Zacatecas, Mexico
  • Email:
/ Tonatiuh Saucedo-Anaya
  • 2) Universidad Autónoma de Zacatecas, Unidad Académica de Física, Calzada Solidaridad Esq. Con Paseo La Bufa S/N, C.P. 98060, Zacatecas, Mexico
  • Email:
/ Maria Araiza-Esquivel
  • 1) Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería Eléctrica, Ramón López Velarde 801, C.P. 98000, Zacatecas, Mexico
  • Email:
/ Raúl E. Balderas-Navarro
  • 3) Instituto de Investigación en Comunicación Óptica (IICO-UASLP), Karakorum 1470, Lomas 4ta. Sección, C.P. 78210, San Luis Potosí, Mexico
  • Email:
/ Alfonso López-Martínez
  • 1) Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería Eléctrica, Ramón López Velarde 801, C.P. 98000, Zacatecas, Mexico
  • Email:
/ Carlos Olvera-Olvera
  • 1) Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería Eléctrica, Ramón López Velarde 801, C.P. 98000, Zacatecas, Mexico
  • Email:
Published Online: 2017-03-20 | DOI: https://doi.org/10.1515/mms-2017-0002


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.

Keywords: Digital Holographic Interferometry; refractive index measurements; phase difference; full-field measurements


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About the article

Received: 2015-12-03

Accepted: 2016-08-28

Published Online: 2017-03-20

Published in Print: 2017-03-01

Citation Information: Metrology and Measurement Systems, ISSN (Online) 2300-1941, DOI: https://doi.org/10.1515/mms-2017-0002.

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© 2017 Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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