Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids

Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids

A noncontact optical fiber sensor for measuring the refractive index of transparent liquids is proposed. It operates by calculating the path of a focused laser beam at 635 nm that travels across the boundaries of a liquid sample. The optical power Fresnel reflections are detected and, subsequently,...

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Main Authors: R. Selvas-Aguilar, A. Castillo-Guzman, L. Cortez-Gonzalez, D. Toral-Acosta, A. Martinez-Rios, G. Anzueto-Sanchez, V. M. Duran-Ramirez, S. Arroyo-Rivera
Format: Article
Language:English
Published: Hindawi Limited 2016-01-01
Series:Journal of Sensors
Online Access:http://dx.doi.org/10.1155/2016/3475782
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spelling doaj-91c96419c4244b4696ff4f4443d036a22020-11-24T22:23:59ZengHindawi LimitedJournal of Sensors1687-725X1687-72682016-01-01201610.1155/2016/34757823475782Noncontact Optical Fiber Sensor for Measuring the Refractive Index of LiquidsR. Selvas-Aguilar0A. Castillo-Guzman1L. Cortez-Gonzalez2D. Toral-Acosta3A. Martinez-Rios4G. Anzueto-Sanchez5V. M. Duran-Ramirez6S. Arroyo-Rivera7Facultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Leon, Avenida Universidad S/N, Cd. Universitaria, 66455 San Nicolás de los Garza, NL, MexicoFacultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Leon, Avenida Universidad S/N, Cd. Universitaria, 66455 San Nicolás de los Garza, NL, MexicoFacultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Leon, Avenida Universidad S/N, Cd. Universitaria, 66455 San Nicolás de los Garza, NL, MexicoFacultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Leon, Avenida Universidad S/N, Cd. Universitaria, 66455 San Nicolás de los Garza, NL, MexicoCentro de Investigaciones en Optica, A.C., Loma del Bosque 115, 37150 Leon, GTO, MexicoCentro de Investigacion en Ingenieria y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Avenida Universidad No. 1001, Colonia Chamilpa, 62209 Cuernavaca, MOR, MexicoCentro Universitario de los Lagos, Universidad Autónoma de Guadalajara, Enrique Diaz de Leon 1144, 47460 Lagos de Moreno, JAL, MexicoFacultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Leon, Avenida Universidad S/N, Cd. Universitaria, 66455 San Nicolás de los Garza, NL, MexicoA noncontact optical fiber sensor for measuring the refractive index of transparent liquids is proposed. It operates by calculating the path of a focused laser beam at 635 nm that travels across the boundaries of a liquid sample. The optical power Fresnel reflections are detected and, subsequently, the refractive index is determined as the ratio between the traveled beam paths when the liquid is deposited versus a reference without the liquid sample. Additionally, a mathematical analysis of the geometrical case is included. The theoretical data from our sensor are in good agreement with the experimental results. The resolution achieved by the sensor is better than 10−3 RIU.http://dx.doi.org/10.1155/2016/3475782
collection DOAJ
language English
format Article
sources DOAJ
author R. Selvas-Aguilar
A. Castillo-Guzman
L. Cortez-Gonzalez
D. Toral-Acosta
A. Martinez-Rios
G. Anzueto-Sanchez
V. M. Duran-Ramirez
S. Arroyo-Rivera
spellingShingle R. Selvas-Aguilar
A. Castillo-Guzman
L. Cortez-Gonzalez
D. Toral-Acosta
A. Martinez-Rios
G. Anzueto-Sanchez
V. M. Duran-Ramirez
S. Arroyo-Rivera
Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
Journal of Sensors
author_facet R. Selvas-Aguilar
A. Castillo-Guzman
L. Cortez-Gonzalez
D. Toral-Acosta
A. Martinez-Rios
G. Anzueto-Sanchez
V. M. Duran-Ramirez
S. Arroyo-Rivera
author_sort R. Selvas-Aguilar
title Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
title_short Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
title_full Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
title_fullStr Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
title_full_unstemmed Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
title_sort noncontact optical fiber sensor for measuring the refractive index of liquids
publisher Hindawi Limited
series Journal of Sensors
issn 1687-725X
1687-7268
publishDate 2016-01-01
description A noncontact optical fiber sensor for measuring the refractive index of transparent liquids is proposed. It operates by calculating the path of a focused laser beam at 635 nm that travels across the boundaries of a liquid sample. The optical power Fresnel reflections are detected and, subsequently, the refractive index is determined as the ratio between the traveled beam paths when the liquid is deposited versus a reference without the liquid sample. Additionally, a mathematical analysis of the geometrical case is included. The theoretical data from our sensor are in good agreement with the experimental results. The resolution achieved by the sensor is better than 10−3 RIU.
url http://dx.doi.org/10.1155/2016/3475782
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