Comptes Rendus
no. 7-8
THz imaging techniques for nondestructive inspections
[Techniques d'imagerie térahertz pour l'analyse industrielle non destructive]
Kodo Kawase1, 2  ; Takayuki Shibuya1, 2  ; Shin'ichiro Hayashi2  ; Koji Suizu1
1 Nagoya University, Furocho, Nagoya 464-8603, Japan
2 RIKEN, 519-1399 Aramaki-aoba, Sendai 980-0845, Japan
Comptes Rendus. Physique, Volume 11 (2010) no. 7-8, pp. 510-518.

Nous proposons un grand nombre d'applications industrielles variées de nouveaux systèmes d'imagerie THz. Tout d'abord, nous avons construit un tomographe THz de très haute résolution, en employant un laser à fibre délivrant des impulsions optiques ultra-brèves qui éclairent un cristal non linéaire pour générer les signaux THz. Nous avons étendu la tomographie à l'inspection tri-dimensionnelle, par exemple de la répartition de la suie dans des filtres céramiques pour l'automobile, réalisée ici avec des ondes millimétriques. Enfin, nous décrirons la mesure de l'épaisseur de films très minces placées sur des grilles métalliques. Toutes ces techniques sont directement applicables au contrôle non destructif pour l'industrie.

We have suggested a wide range of real-life applications using novel terahertz imaging techniques. A high-resolution terahertz tomography has been demonstrated by ultra short terahertz pulses using optical fiber and a nonlinear organic crystal. We also describe a nondestructive inspection system that can monitor the soot distribution in a ceramic filter using millimeter-to-terahertz wave computed tomography. Further, we report on the thickness measurement of very thin films using high-sensitivity metal mesh filter. These techniques are directly applicable to the nondestructive testing in industries.

Publié le :
DOI : 10.1016/j.crhy.2010.04.003
Keywords: Terahertz imaging, Terahertz tomography, Metallic mesh sensor, Nondestructive testing
Mot clés : Imagerie térahertz, Tomographe THz, Capteur de grille métallique, Analyse industrielle non destructive
Kodo Kawase 1, 2 ; Takayuki Shibuya 1, 2 ; Shin'ichiro Hayashi 2 ; Koji Suizu 1

1 Nagoya University, Furocho, Nagoya 464-8603, Japan
2 RIKEN, 519-1399 Aramaki-aoba, Sendai 980-0845, Japan 
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Kodo Kawase; Takayuki Shibuya; Shin'ichiro Hayashi; Koji Suizu. THz imaging techniques for nondestructive inspections. Comptes Rendus. Physique, Volume 11 (2010) no. 7-8, pp. 510-518. doi : 10.1016/j.crhy.2010.04.003. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2010.04.003/

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