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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2012
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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. |
format | Online Article Text |
id | pubmed-3545608 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT lazarjosef refractiveindexcompensationinoverdeterminedinterferometricsystems AT holamiroslava refractiveindexcompensationinoverdeterminedinterferometricsystems AT cipondrej refractiveindexcompensationinoverdeterminedinterferometricsystems AT cizekmartin refractiveindexcompensationinoverdeterminedinterferometricsystems AT hrabinajan refractiveindexcompensationinoverdeterminedinterferometricsystems AT buchtazdenek refractiveindexcompensationinoverdeterminedinterferometricsystems |