TeraHertz imaging of hidden paint layers on canvas
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We show terahertz reflection images of hidden paint layers in a painting on canvas and compare the results with X-ray Radiography and In-frared Reflectography. Our terahertz measurements show strong reflections from both the canvas/paint interface and from the raw umber/lead white interface, indicating sufficient refractive-index contrast. Our results show that X-rays cannot be used to image through the lead white pigment which effectively blocks the X-rays. Although Infrared Reflectography is capable of vaguely observing the hidden paint strokes from the canvas side, we show that only terahertz imaging is capable of providing information on the thickness of the hidden paint layers. Terahertz imaging is thus shown to be a powerful imaging method for art historians, conservators and conservation scientists.
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- Authors
- Adam, A. J. L., Planken, P. C. M., Meloni, S., & Dik, J.
- Affiliations
- Delft University of Technology (NL)
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2009-02-19
- Volume
- 17
- Issue
- 5
- Pages
- 3407
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W1974928032
- Cited by
- 155
- References
- 17
- Citations by year
- 2026: 2 · 2025: 8 · 2024: 6 · 2023: 10 · 2022: 4 · 2021: 12 · 2020: 18 · 2019: 8 · 2018: 11 · 2017: 9 · 2016: 11 · 2015: 9 · 2014: 11 · 2013: 3 · 2012: 6
- FWCI
- 8.20
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- Research Repository (Delft University of Technology) (submittedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Social Sciences › Arts and Humanities › Archeology › Cultural Heritage Materials Analysis
- Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
- Keywords
- terahertz imaging, canvas painting, terahertz reflection imaging, radiography, infrared reflectography, refractive index contrast, umber, art conservation, non-destructive imaging
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