In situ 3D characterization of historical coatings and wood using multimodal nonlinear optical microscopy

Gaël Latour 1, * Jean-Philippe Echard 2 Marie Didier 2 Marie-Claire Schanne-Klein 1
* Corresponding author
2 Laboratoire de recherche et de restauration
Musée de la Musique, CRC - Centre de Recherche sur la Conservation
Abstract : We demonstrate multimodal nonlinear optical imaging of historical artifacts by combining Second Harmonic Generation (SHG) and Two-Photon Excited Fluorescence (2PEF) microscopies. We first identify the nonlinear optical response of materials commonly encountered in coatings of cultural heritage artifacts by analyzing one- and multi-layered model samples. We observe 2PEF signals from cochineal lake and sandarac and show that pigments and varnish films can be discriminated by exploiting their different emission spectral ranges as in luminescence linear spectroscopy. We then demonstrate SHG imaging of a filler, plaster, composed of bassanite particles which exhibit a non centrosymmetric crystal structure. We also show that SHG/2PEF imaging enables the visualization of wood microstructure through typically 60 µm-thick coatings by revealing crystalline cellulose (SHG signal) and lignin (2PEF signal) in the wood cell walls. Finally, in situ multimodal nonlinear imaging is demonstrated in a historical violin. SHG/2PEF imaging thus appears as a promising non-destructive and contactless tool for in situ 3D investigation of historical coatings and more generally for wood characterization and coating analysis at micrometer scale. © 2012 OSA
Complete list of metadatas

Cited literature [28 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00123067
Contributor : Laure Lachapelle <>
Submitted on : Friday, May 9, 2014 - 2:29:35 PM
Last modification on : Friday, May 17, 2019 - 1:47:47 AM
Long-term archiving on : Wednesday, March 29, 2017 - 10:34:02 PM

File

oe-20-22-24623.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Gaël Latour, Jean-Philippe Echard, Marie Didier, Marie-Claire Schanne-Klein. In situ 3D characterization of historical coatings and wood using multimodal nonlinear optical microscopy. Optics Express, Optical Society of America, 2012, 20 (22), pp.24623-24635. ⟨10.1364/OE.20.024623⟩. ⟨hal-00123067⟩

Share

Metrics

Record views

382

Files downloads

452