THz imaging techniques for nondestructive inspections

THz imaging techniques for nondestructive inspections
[Techniques d'imagerie térahertz pour l'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

Comptes Rendus. Physique, Terahertz electronic and optoelectronic components and systems, Volume 11 (2010) no. 7-8, pp. 510-518.

Résumé
Abstract

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 : 2010-07-10

DOI : 10.1016/j.crhy.2010.04.003

Keywords: Terahertz imaging, Terahertz tomography, Metallic mesh sensor, Nondestructive testing
Mots-clés : Imagerie térahertz, Tomographe THz, Capteur de grille métallique, Analyse industrielle non destructive

Affiliations des auteurs :

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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     author = {Kodo Kawase and Takayuki Shibuya and Shin'ichiro Hayashi and Koji Suizu},
     title = {THz imaging techniques for nondestructive inspections},
     journal = {Comptes Rendus. Physique},
     pages = {510--518},
     publisher = {Elsevier},
     volume = {11},
     number = {7-8},
     year = {2010},
     doi = {10.1016/j.crhy.2010.04.003},
     language = {en},
}

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Kodo Kawase; Takayuki Shibuya; Shin'ichiro Hayashi; Koji Suizu. THz imaging techniques for nondestructive inspections. Comptes Rendus. Physique, Terahertz electronic and optoelectronic components and systems, 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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