Suppression of Air Refractive Index Variations in High-Resolution Interferometry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F11%3A00368382" target="_blank" >RIV/68081731:_____/11:00368382 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3390/s110807644" target="_blank" >http://dx.doi.org/10.3390/s110807644</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/s110807644" target="_blank" >10.3390/s110807644</a>

Result language

angličtina

Original language name

Suppression of Air Refractive Index Variations in High-Resolution Interferometry

Original language description

The influence of the refractive index of air has proven to be a major problem on the road to improvement of the uncertainty in interferometric displacement measurements. We propose an approach with two counter-measuring interferometers acting as a combination of tracking refractometer and a displacement interferometer referencing the wavelength of the laser source to a mechanical standard made of a material with ultra-low thermal expansion. This technique combines length measurement within a specified range with measurement of the refractive index fluctuations in one axis. Errors caused by different position of the interferometer laser beam and air sensors are thus eliminated. The method has been experimentally tested in comparison with the indirect measurement of the refractive index of air in a thermal controlled environment. Over a 1 K temperature range an agreement on the level of 5 x 10(-8) has been achieved.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BH - Optics, masers and lasers

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2011

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Sensors

ISSN

1424-8220

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

8

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

7644-7655

UT code for WoS article

000294253900019

EID of the result in the Scopus database

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