Non-invasive mesurements of transparent fibres

Autor: Świrniak Grzegorz
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Metrology and Measurement Systems, Vol 27, Iss 1, Pp 19-31 (2020)
Druh dokumentu: article
ISSN: 2300-1941
DOI: 10.24425/mms.2020.131714
Popis: This paper presents a non-invasive measurement method for simultaneous characterization of diameter and refractive index of transparent fibres. The method is based on scattering of a polychromatic beam of light by a side-illuminated fibre under study. Both quantities of interest are inversely calculated from the scattering far-field region in the vicinity of the primary rainbow. The results of practical measurements are examined with the use of a novel optical system for laboratory-level tests. An analysis of prediction errors for 20– 120 μm thick fibres having various refractive indices helps to assess the outcome of the measurement data. The results show a clear route to improve the measurement process in on-line industrial process control.
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