Polarisation changes in guided infrared thermography using silver halide poly-crystalline mid-infrared fibre bundle

Autor:	Sarah Markham, Liya Zhukova, Joanna Bauer, Aleksandr Korsakov, Aladin Mani, E.A. Korsakova, Syed A. M. Tofail, Christophe Silien
Přispěvatelé:	SFI, RSF
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	TEMPERATURE DIFFERENCES POLARIZATION Optical fiber Infrared TEMPERATURE MEASUREMENT SPATIAL TEMPERATURE DISTRIBUTION 02 engineering and technology THERMOGRAPHY (IMAGING) 01 natural sciences law.invention chemistry.chemical_compound law INFRARED THERMOGRAPHY Fiber bundle POLARISATION SENSITIVITY BROADBAND MID-INFRARED FIBRE BUNDLE 021001 nanoscience & nanotechnology Condensed Matter Physics 3. Good health Core (optical fiber) CROSS-POLARISATION SILVER HALIDES Broadband mid-infrared fibre bundle Thermography Optical polarisation THERMAL MEASUREMENTS 0210 nano-technology FIBERS OPTICAL POLARISATION INFRARED DEVICES Materials science MEDICAL IMAGING DIAGNOSIS Silver halide poly-crystalline Temperature measurement EXPERIMENTAL SET UP Article 010309 optics SILICON CARBIDE Optics 0103 physical sciences Physical and Theoretical Chemistry SILVER HALIDE POLY-CRYSTALLINE Silver halide business.industry TRANSMISSION BANDWIDTH POLARISATION DEPENDENCE PERSONALISED MEDICINE chemistry Bundle Infrared thermography Personalised medicine business
Zdroj:	Journal of Thermal Analysis and Calorimetry J Therm Anal Calor
ISSN:	1588-2926 1388-6150
Popis:	Broadband mid-infrared (B-MIR) thermography using fibre optic waveguides can be critical in real-time imaging in harsh environments such as additive manufacturing, personalised medical diagnosis and therapy. We investigate the polarisation effect on thermal measurements through poly-crystalline fibre bundle employing a simple broadband cross-polarisation configuration experimental set-up. Silver halide poly-crystalline fibres AgCl1−xBrx (0 ≤ x≤1) (AgClBr-PolyC) have very wide transmission bandwidth spanning over the spectral range from 1 µm up to 31 µm FWHM. Moreover, they are non-toxic, non-hygroscopic, with relatively good flexibility, which make them very adequate for spectroscopic and thermal measurements in medical and clinical fields. In this study, we used a fibre bundle composed of seven single AgClBr-PolyC fibres, each with a core diameter of about 300 µm, inserted between two broadband MIR polarisers.A silicon carbide filament source was placed at the entrance of the fibre bundle, while a FLIR thermal camera with a close-up lens was employed to measure the spatial temperature distribution over the fibre-bundle end. Indeed, polarisation dependence of temperature measurements has been clearly observed in which the orientation of temperature extrema (minima and maxima)vary from one fibre to another within the bundle. Moreover, these observations have enabled the classification of AgClBr-PolyC fibres following their polarisation sensitivities by which some fibres are relatively highly sensitive to polarisation with polarisation temperature difference (PTD) that can reach 22.1 ± 2.8 °C, whereas some others show very low PTD values down to 3.1 ± 2.8 °C. Many applications can readily be found based on the advantages of both extreme cases. © 2020, The Author(s). SM, AM, CS, JB and SAMT acknowledge European Commission Erasmus International Credit Mobility 2015–2020 between Ural Federal University named after the frst President of Russia B.N. Yeltsin, Yekaterinburg, Russia, and University of Limerick, Ireland, as well as Erasmus Bilateral Exchange between Wroclaw University of Science and Technology, Poland, and University of Limerick, Ireland, 2010–2020 for funding the work on imaging, characterisation and application development using MIR bundle fbres in medicine and manufacturing. JB acknowledges European Commission Erasmus+KA107 Inter-institutional Student and Staf Mobility Programme 2018–2020 between Wroclaw University of Science and Technology, Poland, and Ural Federal University, Yekaterinburg, Russia. SM and AM acknowledges Science Foundation Ireland (SFI) Centre for Medical Devices co-funded under the European Regional Development Fund (Grant Number 13/RC/2073) for characterising bundle fbre. EK, AK and LZ acknowledge Grant No. 18-73-10063 from the Russian Science Foundation for funding the fabrication of fbre bundles.
Databáze:	OpenAIRE
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