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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 3 — Feb. 1, 2008
  • pp: 240–242

Nonlinear imaging microscopy techniques as diagnostic tools for art conservation studies

George Filippidis, Emilio J. Gualda, Kristalia Melessanaki, and Costas Fotakis  »View Author Affiliations

Optics Letters, Vol. 33, Issue 3, pp. 240-242 (2008)

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We present results of the implementation of three-photon excitation fluorescence (3PEF) and third harmonic generation imaging measurements for the precise and nondestructive detection of natural and synthetic varnish layers, which are used for the surface protection of painted artifacts. For this purpose, we employ as an excitation source a compact femtosecond laser operating at 1028 nm . Two-dimensional images of the multilayer structures from different samples are depicted. The third harmonic signals show the interface between the different materials, when its refractive index mismatch is high enough. The depths of different layers of varnishes, presenting similar refractive index, are distinguishable with an axial resolution of 1 μ m by employing 3PEF measurements.

© 2008 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(140.7090) Lasers and laser optics : Ultrafast lasers
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(180.4315) Microscopy : Nonlinear microscopy

ToC Category:
Nonlinear Optics

Original Manuscript: November 29, 2007
Revised Manuscript: December 18, 2007
Manuscript Accepted: December 23, 2007
Published: January 29, 2008

Virtual Issues
Vol. 3, Iss. 3 Virtual Journal for Biomedical Optics

George Filippidis, Emilio J. Gualda, Kristalia Melessanaki, and Costas Fotakis, "Nonlinear imaging microscopy techniques as diagnostic tools for art conservation studies," Opt. Lett. 33, 240-242 (2008)

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