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Frequency modulated continuous wave (FMCW) radar is an approach able of measure distance between the target and the antenna. This method is well known method in the GHz domain and this now developped in the terahertz range for short range non destructive test.
This article examines the possibility of using a high frequency radar (300 GHz) to detect fractures and lithological changes in rocks. This study, carried out in collaboration between Federico Sanjuan (University of Pau, France) and the IMS laboratory (University of Bordeaux), is in the context of the improvement of the methods of detection and quantification…
In this paper published in july 2020 in IEEE Transactions on Terahertz Science and Technology, we present a reflectometry sensing system associated with a frequency modulated continuous wave radar. Then, a solid immersion lens is added to the system to improve the resolution. Abstract of terahertz reflectometry setup Frequency Modulated Continuous Wave (FMCW) radar systems…
As part of the Saphyr project, photonic and aeronautic prototypes from the Aquitaine region will be presented at the Paris Air show 2019. Visit our booth A120 Hall 4 to discuss terahertz waves applied to non-destructive testing. This project is in collaboration between the IMS laboratory (Laser & Terahertz Test Team) and R&D Vision.
In this paper, we focus on data processing applied to terahertz FMCW measurement of a painting. Investigated paintings FMCW radar processing The proposed approach consist to use longitudinal information of FMCW signal to adjust amplitude. This calibration process was tested on a stepped target and then on the investigated painting, giving a more homogeneous result,…
Guillet, J. P., Recur, B., Frederique, L., Bousquet, B., Canioni, L., Manek-Hönninger, I., … & Mounaix, P. (2014). Review of terahertz tomography techniques. Journal of Infrared, Millimeter, and Terahertz Waves, 35(4), 382-411.
Introduction Terahertz time domain imaging, FMCW and spectroscopy are useful tools for art restorer to inspect paintings and other cultural. Thanks to the different terahertz equipments present on the terahertz platform in Bordeaux, we have set up collaborations with art restorers and researchers working on the analysis of works of art with terahertz. This article presents…