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Proceedings Paper

An interferometric humidity sensor based on a thin gelatin film
Author(s): Sergio Calixto; Areli Montes-Perez
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Paper Abstract

Gelatin thin films inserted in a Mach – Zehnder interferometer were used to monitor Relative Humidity (RH). When RH varied, gelatin film thickness and refractive index also changed. As a result interference pattern moved horizontally. A fixed detector, with a pinhole in front of it, was placed at the interference pattern. It sampled the pattern when it moved. These intensity values were used to find a calibration plot relating intensity as a function of RH.

Paper Details

Date Published: 18 August 2014
PDF: 5 pages
Proc. SPIE 9203, Interferometry XVII: Techniques and Analysis, 920318 (18 August 2014); doi: 10.1117/12.2063295
Show Author Affiliations
Sergio Calixto, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Areli Montes-Perez, Ctr. de Investigaciones en Óptica, A.C. (Mexico)

Published in SPIE Proceedings Vol. 9203:
Interferometry XVII: Techniques and Analysis
Katherine Creath; Jan Burke; Joanna Schmit, Editor(s)

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