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Recent Advances in Nondestructive Optoexcitation Thermography

Call for Papers

Thermography is a nondestructive testing method based on the principle that two dissimilar materials, from a thermophysical point of view, would produce two distinctive thermal signatures that can be revealed by an infrared sensor, such as a thermal camera. In order to produce a thermal response, different types of energy can be used, for example, chemical, mechanical, inductive, and optical energy. On the last one (i.e., the optical stimulus) this special issue is focused, since it has many technical advantages, for example, the possibility of retrieving defect depths when applied to various materials. It is also useful for both laboratory and in situ inspections (e.g., in the cultural heritage field), while the imposed time domain waveforms may be different in relation to the object to be analyzed. In order to solve the problem linked to the optimal combination of the thermal response and the material, many companies show the interest towards the integration of different thermal excitation sources (although not simultaneous used) in the same device, which underlines the need to launch this special issue.

We are seeking original research articles as well as review articles on existing and new applications of optical thermography. Research articles centered on the use of LED lamps as an excitation source are highly encouraged. The same can be said for lasers. Numerical modelling proposing new directions integrated with cutting-edge postprocessing methods is particularly welcomed.

Potential topics include but are not limited to the following:

  • Advanced time-modulation of photothermal excitation (pulse, chirp, wave-coded, and sawtooth) applied to infrared thermography
  • Advances in spatial projection of photothermal excitation applied to infrared thermography
  • Numerical modelling integrated with experimental tests
  • Testing on different types of materials, including natural or synthetic materials with crystalline or amorphous structures
  • Quantitative thermographic analyses, for example, reverse retrieval of defect depths and defect shapes

Authors can submit their manuscripts through the Manuscript Tracking System at

Submission DeadlineFriday, 7 December 2018
Publication DateApril 2019

Papers are published upon acceptance, regardless of the Special Issue publication date.

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