Real-Time Two-Dimensional Spatiotemporal Terahertz Imaging Based on Noncollinear Free-Space Electrooptic Sampling and Application to Functional Terahertz Imaging of Moving Object

Takeshi Yasui (1) , Mukesh Jewariya (1) , Takashi Yasuda (2, 3) , Markus Schirmer (2, 4) , Tsutomu Araki (2) , Emmanuel Abraham (5)

1 Institut of Technology and Science [Tokushima]
2 Graduate School of Engineering Science [Toyonaka, Osaka]
3 Hamamatsu Photonics K.K.
4 RWTH - Rheinisch-Westfälische Technische Hochschule Aachen University
5 LOMA - Laboratoire Ondes et Matière d'Aquitaine

We review 2-D spatiotemporal (2D-ST) terahertz (THz) imaging based on noncollinear free-space electrooptic sampling and its application to THz reflection tomography, THz spectral imaging, and THz spectral computed tomography (CT). 2D-ST #x00A0;THz imaging enables high-speed image acquisition at much higher rates than previously. Two-dimensional THz reflection tomography was effective for visualizing the internal structure of a moving paint film. A THz color scanner demonstrated the potential of rapid nondestructive inspection of moving pharmaceutical tablets. A THz spectral CT system using real-time line projection of a THz beam was effectively applied to a continuously rotating object. 2D-ST THz imaging enables functional THz imaging of moving objects in various practical applications.

Mots clés: Electrooptic effects; imaging; nondestructive testing; spectroscopy; terahertz radiation

Domaines: Optique [physics.optics]

Takeshi Yasui, Mukesh Jewariya, Takashi Yasuda, Markus Schirmer, Tsutomu Araki, et al.. Real-Time Two-Dimensional Spatiotemporal Terahertz Imaging Based on Noncollinear Free-Space Electrooptic Sampling and Application to Functional Terahertz Imaging of Moving Object. IEEE Journal of Selected Topics in Quantum Electronics, 2013, 19 (1), pp.8600110. ⟨10.1109/JSTQE.2012.2210393⟩. ⟨hal-00786150⟩