Title
Three-dimensional spectral measurements of paint samples using optical coherence tomography
Author
Maria, M. (TU Delft Structural Integrity & Composites)
d'Hont, Lieve (Universiteit van Amsterdam)
Anisimov, A. (TU Delft Structural Integrity & Composites) 
Stols-Witlox, Maartje (Universiteit van Amsterdam)
Groves, R.M. (TU Delft Structural Integrity & Composites)
Contributor
Liang, Haida (editor)
Groves, Roger (editor)
Date
2021
Abstract
In this study, we describe a method for measuring the spectral reflectance of a paint layer at both the surface and in the volume of the paint layers. We first present a fringes model which illustrates the possibilities for spectral reconstruction using a Short-Time-Fourier-Transform algorithm. We investigate the remaing percentage errors and identified that there is a strong fluctuation along the wavelength range of the spectrometer. Then, we demonstrate the validity of our approach experimentally by measuring the spectral reflectance of a paint layer using a custom-made visible light optical coherence tomography system. There, we reconstruct the spectral reflectance of a paint layer by probing the surface and a depth range below the surface. Finally, we show the importance to include a wavelength sensitive correction in the reconstruction for taking into account the spectral shape of the light in the reference path of the interferometer. This work is part of the Down To The Ground project, in which the results of the OCT inspection will be used directly by a consortium of technical art historians and conservators.
Subject
Hyperspectral imaging
Optical coherence tomography
Spectral calibration
Spectroscopy
To reference this document use:
http://resolver.tudelft.nl/uuid:3bf242b3-de7e-4b1d-8bc8-a12edfe159ae
DOI
https://doi.org/10.1117/12.2592663
Publisher
SPIE
Embargo date
2022-03-01
ISBN
9781510644021
Source
Optics for Arts, Architecture, and Archaeology VIII
Event
Optics for Arts, Architecture, and Archaeology VIII 2021, 2021-06-21 → 2021-06-25, Virtual, Online, Germany
Series
Proceedings of SPIE - The International Society for Optical Engineering, 0277-786X, 11784
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2021 M. Maria, Lieve d'Hont, A. Anisimov, Maartje Stols-Witlox, R.M. Groves