Abstract-THz Tomography and image processing: a new tool for polymer and ceramic additive manufacturing quality control

15th Asia Pacific Conference for Non-Destructive Testing 

J.B. Perraud, A.F Obaton, B. Recur, H. Balacey, F. Darracq, J.P. Guillet, P.Mounaix,

http://www.ndt.net/events/APCNDT2017/app/content/Paper/129_Mounaix_Rev2.pdf

Additive manufacturing (AM) is an essential tool to make 3D objects having very complex shapes and geometries, unachievable with standard manufacturing approaches. Meanwhile, quality controls of such objects become challenging for both industrials and applications in laboratories due to both their complexity and the materials they are made of. Consequently, we demonstrate that terahertz (THz) imaging and THz tomography can be considered as efficient methods for such object inspection in routine applications. Thus, this paper proposes an experimental study of 3D polymer objects obtained by AM techniques. This approach allows us to characterize defects and to control dimensions by volumetric measurements on 3D data reconstructed by tomography.