Enhanced Terahertz Imaging of Small Forced Delamination in Woven Glass Fibre-reinforced Composites with Wavelet De-noising

Abstract

Terahertz (THz) reflection imaging is applied to characterize a woven glass fibre-reinforced composite laminate with a small region of forced delamination. The forced delamination is created by inserting a disk of 25- μ m-thick Upilex film, which is below the THz axial resolution, resulting in one featured echo with small amplitude in the reflected THz pulses. Low-amplitude components of the temporal signal due to ambient water vapor produce features of comparable amplitude with features associated with the THz pulse reflected off the interfaces of the delamination and suppress the contrast of THz C- and B-scans. Wavelet shrinkage de-noising is performed to remove water-vapor features, leading to enhanced THz C- and B-scans to locate the delamination in three dimensions with high contrast.

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The CLEO 2016 Call for Papers is Now Open!

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Engineering Student Recognized by National Society

Nathan Burford, a doctoral student in the microelectronics-photonics program, recently received a Doctoral Research Fellowship from the Institute of Electrical and Electronics Engineers Antennas and Propagation Society. Burford was recognized for his research on terahertz radiation by the IEEE awards board, which seeks to honor members whose research proves beneficial to society.

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ISTFA proves to be a success

TeraView had a great time at this years ISTFA!

We would like to thank everyone involved for putting on such a great event, and we look forward to seeing you all again next year!