TY - JOUR N2 - 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. L1 - http://www.czasopisma.pan.pl/Content/115045/PDF/02_MMS_1_2020.pdf L2 - http://www.czasopisma.pan.pl/Content/115045 PY - 2020 IS - No 1 EP - 31 DO - 10.24425/mms.2020.131714 KW - fibre characterization KW - scattering measurements KW - inverse scattering A1 - Świrniak, Grzegorz PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 27 DA - 2020.03.18 T1 - Non-invasive mesurements of transparent fibres SP - 19 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/115045 T2 - Metrology and Measurement Systems ER -