Optical imaging techniques make it possible to reveal details invisible to the naked eye, while respecting the integrity of the works.
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Optical imaging offers a fine and non-invasive exploration of artworks, revealing elements invisible to the naked eye. It allows for the examination of both the surface layers (varnish, pigments, retouching) and the underlying layers (preparatory drawings, pentimenti, hidden signatures), without contact or alteration of the material.
Particularly suited for paintings, wall frescoes, ancient manuscripts, decorated objects, or polychromes, this imaging method helps to retrace the creation process, identify past interventions, and better understand the state of conservation.
It is a key first step in any study, restoration or authentication protocol.
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Optical imaging methods are non-destructive and non-contact. They respect the conservation constraints of old, fragile, or unique works. Unlike chemical or physical analysis techniques, they do not require any sampling.
These analyses integrate easily into cross-analysis protocols, notably with radiocarbon dating, microanalysis, or even radiography. Together, these techniques offer a complete scientific reading of the object.
CIRAM performs these analyses:
A reliable, scientifically-proven mobile solution for heritage research and preservation.
Request a quoteExaminations in visible light constitute a fundamental first approach in the analysis of artworks. They allow for the observation of physical characteristics, surface alterations, and certain technical elements related to the creation or conservation of the object. CIRAM mobilizes three complementary types of imaging:
These techniques, which are entirely non-destructive, enhance the visual diagnosis and provide invaluable clues as to the condition, material history and manufacture of the works.
UV fluorescence imaging exploits the properties of certain pigments and varnishes to emit specific light when subjected to ultraviolet radiation. This technique is particularly valuable for the analysis of paintings, manuscripts, and polychrome objects.
It reveals essential information about the state of conservation of the works:
An essential diagnostic tool, UV fluorescence illuminates areas of interest to guide restorations or alert to potential old interventions.
IR reflectography allows for the examination of the deeper layers of a pictorial work using a high-definition infrared camera. By passing through the upper layers, this radiation reveals what is invisible to the naked eye.
It is used for :
The preferred tool of art experts, IR reflectography is an invaluable aid to authentication and the study of the creative process.
For over 20 years, CIRAM has been supporting museums, galleries, art market experts, and archaeologists in their scientific heritage analysis projects. Thanks to a unique combination of scientific expertise and cutting-edge equipment, CIRAM guarantees examinations tailored to each artwork, regardless of its format or condition.
Technologies used include :
These techniques can be combined with each other or coupled with complementary methods: carbon-14 dating, pigment analysis, microanalysis, or radiography. For paintings, these cross-references are often necessary to confirm attribution hypotheses or reveal the exact nature of an old treatment.
Each intervention is accompanied by an illustrated scientific report, adapted to the challenges of conservation, authentication or enhancement of the work.
Contact our teamsPaintings, frescoes, manuscripts, decorated or polychrome objects.
No. These are non-invasive, non-contact methods, perfectly suited to conservation requirements.
Before restoration, to guide interventions; during appraisal or attribution; or in a museographic or scientific context.
Yes, CIRAM combines optical imaging with other methods (dating, radiography, microanalysis) for a complete study.
Yes. Our teams travel with portable equipment and perform analyses on-site, while respecting conservation conditions.
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