Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer

The quantities that are usually measured are time, pressure, temperature, and relative humidity to mention but a few. The word humidity is used when we are dealing with water vapor which is a gas. The instrument used to measure the humidity is the hygrometer that can be based on electronics, optics,...

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Main Author: Sergio Calixto
Format: Article
Language:English
Published: Wiley 2022-01-01
Series:Advances in Materials Science and Engineering
Online Access:http://dx.doi.org/10.1155/2022/5709126
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author Sergio Calixto
author_facet Sergio Calixto
author_sort Sergio Calixto
collection DOAJ
description The quantities that are usually measured are time, pressure, temperature, and relative humidity to mention but a few. The word humidity is used when we are dealing with water vapor which is a gas. The instrument used to measure the humidity is the hygrometer that can be based on electronics, optics, mechanics, chemicals, and others. The measurement of humidity shows its importance in applications such as food processing, meteorological, semiconductor, building and construction, medical, and automotive to mention but a few. This paper shows the adaptation of an optical interferometer, the Fabry-Perot (F-P), to measure the relative humidity. The transductors that have been probed are gelatin-thin films that are inserted between the mirrors of the FP. When water molecules are absorbed (desorbed) by the gelatin film, its refractive index and thickness change giving a movement of the rings in the interference pattern. The calibration plot comprises the ring displacement as a function of the relative humidity.
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spelling doaj-art-e4aa34bcd4ce42d28b055a6e85de49ca2025-02-03T06:13:03ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/5709126Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot InterferometerSergio Calixto0Centro De Investigaciones En OpticaThe quantities that are usually measured are time, pressure, temperature, and relative humidity to mention but a few. The word humidity is used when we are dealing with water vapor which is a gas. The instrument used to measure the humidity is the hygrometer that can be based on electronics, optics, mechanics, chemicals, and others. The measurement of humidity shows its importance in applications such as food processing, meteorological, semiconductor, building and construction, medical, and automotive to mention but a few. This paper shows the adaptation of an optical interferometer, the Fabry-Perot (F-P), to measure the relative humidity. The transductors that have been probed are gelatin-thin films that are inserted between the mirrors of the FP. When water molecules are absorbed (desorbed) by the gelatin film, its refractive index and thickness change giving a movement of the rings in the interference pattern. The calibration plot comprises the ring displacement as a function of the relative humidity.http://dx.doi.org/10.1155/2022/5709126
spellingShingle Sergio Calixto
Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer
Advances in Materials Science and Engineering
title Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer
title_full Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer
title_fullStr Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer
title_full_unstemmed Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer
title_short Gelatin Used as a Transductor in an Optical Hygrometer Based on a Fabry-Perot Interferometer
title_sort gelatin used as a transductor in an optical hygrometer based on a fabry perot interferometer
url http://dx.doi.org/10.1155/2022/5709126
work_keys_str_mv AT sergiocalixto gelatinusedasatransductorinanopticalhygrometerbasedonafabryperotinterferometer