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Refractive Index Compensation in Over-Determined Interferometric Systems

We present an interferometric technique based on a differential interferometry setup for measurement under atmospheric conditions. The key limiting factor in any interferometric dimensional measurement are fluctuations of the refractive index of air representing a dominating source of uncertainty wh...

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Detalles Bibliográficos
Autores principales: Lazar, Josef, Holá, Miroslava, Číp, Ondřej, Čížek, Martin, Hrabina, Jan, Buchta, Zdeněk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3545608/
https://www.ncbi.nlm.nih.gov/pubmed/23202037
http://dx.doi.org/10.3390/s121014084
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author Lazar, Josef
Holá, Miroslava
Číp, Ondřej
Čížek, Martin
Hrabina, Jan
Buchta, Zdeněk
author_facet Lazar, Josef
Holá, Miroslava
Číp, Ondřej
Čížek, Martin
Hrabina, Jan
Buchta, Zdeněk
author_sort Lazar, Josef
collection PubMed
description We present an interferometric technique based on a differential interferometry setup for measurement under atmospheric conditions. The key limiting factor in any interferometric dimensional measurement are fluctuations of the refractive index of air representing a dominating source of uncertainty when evaluated indirectly from the physical parameters of the atmosphere. Our proposal is based on the concept of an over-determined interferometric setup where a reference length is derived from a mechanical frame made from a material with a very low thermal coefficient. The technique allows one to track the variations of the refractive index of air on-line directly in the line of the measuring beam and to compensate for the fluctuations. The optical setup consists of three interferometers sharing the same beam path where two measure differentially the displacement while the third evaluates the changes in the measuring range, acting as a tracking refractometer. The principle is demonstrated in an experimental setup.
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spelling pubmed-35456082013-01-23 Refractive Index Compensation in Over-Determined Interferometric Systems Lazar, Josef Holá, Miroslava Číp, Ondřej Čížek, Martin Hrabina, Jan Buchta, Zdeněk Sensors (Basel) Article We present an interferometric technique based on a differential interferometry setup for measurement under atmospheric conditions. The key limiting factor in any interferometric dimensional measurement are fluctuations of the refractive index of air representing a dominating source of uncertainty when evaluated indirectly from the physical parameters of the atmosphere. Our proposal is based on the concept of an over-determined interferometric setup where a reference length is derived from a mechanical frame made from a material with a very low thermal coefficient. The technique allows one to track the variations of the refractive index of air on-line directly in the line of the measuring beam and to compensate for the fluctuations. The optical setup consists of three interferometers sharing the same beam path where two measure differentially the displacement while the third evaluates the changes in the measuring range, acting as a tracking refractometer. The principle is demonstrated in an experimental setup. Molecular Diversity Preservation International (MDPI) 2012-10-19 /pmc/articles/PMC3545608/ /pubmed/23202037 http://dx.doi.org/10.3390/s121014084 Text en © 2012 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Lazar, Josef
Holá, Miroslava
Číp, Ondřej
Čížek, Martin
Hrabina, Jan
Buchta, Zdeněk
Refractive Index Compensation in Over-Determined Interferometric Systems
title Refractive Index Compensation in Over-Determined Interferometric Systems
title_full Refractive Index Compensation in Over-Determined Interferometric Systems
title_fullStr Refractive Index Compensation in Over-Determined Interferometric Systems
title_full_unstemmed Refractive Index Compensation in Over-Determined Interferometric Systems
title_short Refractive Index Compensation in Over-Determined Interferometric Systems
title_sort refractive index compensation in over-determined interferometric systems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3545608/
https://www.ncbi.nlm.nih.gov/pubmed/23202037
http://dx.doi.org/10.3390/s121014084
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