Junliang Dong

TL;DR: In this paper, the authors used reflective pulsed terahertz imaging to locate and size the forced delamination in polyetherimide resins in 3D dimensions and determined the thicknesses of the delamination and the layers constituting the laminate.

TL;DR: The stratigraphy of the painting including the paint layers is reconstructed and subsurface features are clearly revealed, demonstrating that terahertz frequency-wavelet deconvolution can be an effective tool to characterize stratified systems with optically thin layers.

TL;DR: Numerical simulations and experimental measurements show that sparse deconvolution can be considered as an effective tool for terahertz nondestructive characterization of multilayered structures.

TL;DR: This work demonstrates sparsity-based terahertz reflectometry can be applied to extract a detailed 3D mapping of the layer structure of the 17th century easel painting Madonna in Preghiera by the workshop of Giovanni Battista Salvi da Sassoferrato, in which the structures of the canvas support, the ground, imprimatura, underpainted, pictorial, and varnish layers are identified quantitatively.

TL;DR: In this paper, a terahertz imaging is applied to characterize a hybrid fiber-reinforced composite laminate subject to low-velocity impact in a cross-ply stack pattern.