Perraud J B, Obaton A F, Bou-Sleiman J, Recur B, Balacey H, Darracq F, Guillet J P, Mounaix P
Appl Opt. 2016 May 1;55(13):3462-7. doi: 10.1364/AO.55.003462.
Additive manufacturing (AM) technology is not only used to make 3D objects but also for rapid prototyping. In industry and laboratories, quality controls for these objects are necessary though difficult to implement compared to classical methods of fabrication because the layer-by-layer printing allows for very complex object manufacturing that is unachievable with standard tools. Furthermore, AM can induce unknown or unexpected defects. Consequently, we demonstrate terahertz (THz) imaging as an innovative method for 2D inspection of polymer materials. Moreover, THz tomography may be considered as an alternative to x-ray tomography and cheaper 3D imaging for routine control. This paper proposes an experimental study of 3D polymer objects obtained by additive manufacturing techniques. This approach allows us to characterize defects and to control dimensions by volumetric measurements on 3D data reconstructed by tomography.
增材制造（AM）技术不仅用于制造三维物体，还用于快速成型。在工业和实验室中，对这些物体进行质量控制是必要的，不过与传统制造方法相比，实施起来较为困难，因为逐层打印能够制造出非常复杂的物体，而这是标准工具无法实现的。此外，增材制造可能会引发未知或意外的缺陷。因此，我们展示了太赫兹（THz）成像作为一种用于聚合物材料二维检测的创新方法。此外，太赫兹层析成像可被视为X射线层析成像的替代方法，以及用于常规控制的更廉价的三维成像方法。本文提出了一项关于通过增材制造技术获得的三维聚合物物体的实验研究。这种方法使我们能够通过对层析成像重建的三维数据进行体积测量来表征缺陷并控制尺寸。
