0436586 - ÚPT 2015 RIV DE eng C - Conference Paper (international conference)
Lazar, Josef - Holá, Miroslava - Hrabina, Jan - Buchta, Zdeněk - Číp, Ondřej - Oulehla, Jindřich
Interferometry with Stabilization of Wavelength within a Fixed Measuring Range.
FRINGE 2013 7th International Workshop on Advanced Optical Imaging and Metrology. Heidelberg: Springer Berlin Heidelberg, 2013 - (Osten, W.), s. 645-648. Sringer. ISBN 978-3-642-36358-0.
[FRINGE 2013 7th International Workshop on Advanced Optical Imaging and Metrology. Nurtingen (DE), 09.09.2013-11.09.2013]
R&D Projects: GA ČR GPP102/11/P820; GA MŠMT ED0017/01/01; GA MŠMT EE2.4.31.0016; GA TA ČR TA02010711; GA TA ČR TE01020233
Institutional support: RVO:68081731
Keywords : interferometry * tabilization of wavelength * measuring range
Subject RIV: BH - Optics, Masers, Lasers
DOI: https://doi.org/10.1007/978-3-642-36359-7_119

We present an interferometric technique based on differential interferometry setup for measurement in the subnanometer scale in atmospheric conditions. One of the important limiting factors in any optical measurement are fluctuations of the refractive index of air representing a source of uncertainty traditionally compensated when the index is evaluated indirectly from the physical parameters of the atmosphere. Our proposal is based on the concept of overdetermined interferometric setup where a reference length is derived from a mechanical frame made from a material with very low thermal coefficient on the 10− 8 level. The technique allows 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.
Permanent Link: http://hdl.handle.net/11104/0240302