Three-dimensional spectral measurements of paint samples using optical coherence tomography

Michael Maria, Lieve d'Hont, Andrei G. Anisimov, Maartje Stols-Witlox, Roger M. Groves

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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.

Original languageEnglish
Title of host publicationOptics for Arts, Architecture, and Archaeology VIII
EditorsHaida Liang, Roger Groves
PublisherSPIE
Number of pages6
ISBN (Electronic)9781510644021
DOIs
Publication statusPublished - 2021
EventOptics for Arts, Architecture, and Archaeology VIII 2021 - Virtual, Online, Germany
Duration: 21 Jun 202125 Jun 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11784
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptics for Arts, Architecture, and Archaeology VIII 2021
CountryGermany
CityVirtual, Online
Period21/06/2125/06/21

Keywords

  • Hyperspectral imaging
  • Optical coherence tomography
  • Spectral calibration
  • Spectroscopy

Fingerprint

Dive into the research topics of 'Three-dimensional spectral measurements of paint samples using optical coherence tomography'. Together they form a unique fingerprint.

Cite this