Professor Andrew Beeby andrew.beeby@durham.ac.uk
Professor
There’s More to Reflectance Spectroscopy Than Lux
Beeby, Andrew; Garner, Louise; Howell, David; Nicholson, Catherine E.
Authors
Louise Garner
David Howell
Catherine E. Nicholson
Abstract
Fibre-optic reflectance spectroscopy is widely used as a tool for the analysis of coloured materials such as pigments and paints. We describe a new design for a FORS probe which is held some 5cm away from the sample surface and interrogates a spot of 2mm diameter, offering a significant advantage over existing methods. The spectrometer employs an illuminance of 1250lux, equivalent to 0.5mWcm−2 averaged across the visible spectrum. The spectral measurements take less than a second ensuring that the risk of sample photodegradation is minimal. Under these conditions there is no detectable temperature rise of the illuminated area. Increasing the illuminance above 25mWcm−2, a light level significantly higher than that required for our measurements, gave rise to significant localised temperature rises in model manuscripts. This demonstrates the need for caution when using this technique for the analysis of precious heritage items.
Citation
Beeby, A., Garner, L., Howell, D., & Nicholson, C. E. (2018). There’s More to Reflectance Spectroscopy Than Lux. Journal of the Institute of Conservation, 41(2), 142-153. https://doi.org/10.1080/19455224.2018.1463920
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 9, 2018 |
Online Publication Date | May 8, 2018 |
Publication Date | May 8, 2018 |
Deposit Date | Apr 11, 2018 |
Publicly Available Date | Apr 11, 2018 |
Journal | Journal of the Institute of Conservation |
Print ISSN | 1945-5224 |
Electronic ISSN | 1945-5232 |
Publisher | Taylor and Francis Group |
Peer Reviewed | Peer Reviewed |
Volume | 41 |
Issue | 2 |
Pages | 142-153 |
DOI | https://doi.org/10.1080/19455224.2018.1463920 |
Files
Accepted Journal Article
(848 Kb)
PDF
Copyright Statement
© 2018 The Authors. Published by Informa UK Limited, trading as Taylor & Francis Group This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which
permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Published Journal Article (Advance online version)
(1.8 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
Advance online version
Published Journal Article (Final published version)
(1.8 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
Final published version
You might also like
Tuning Emission Lifetimes of Ir(C^N)2(acac) Complexes with Oligo(phenyleneethynylene) Groups
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search