Terahertz imaging of concealed objects by acoustic phase detection

Federico Buersgens; Guillermo Acuna; Roland Kersting

doi:10.1117/12.776862

15 April 2008 Terahertz imaging of concealed objects by acoustic phase detection

Federico Buersgens, Guillermo Acuna, Roland Kersting

Proceedings Volume 6949, Terahertz for Military and Security Applications VI; 694905 (2008) https://doi.org/10.1117/12.776862
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

We present a novel technique for detecting objects that are concealed by textiles. Items of virtually all materials can be sensed, which includes metals as well as dielectrics. Our technique detects the acoustic phase lag of objects when they follow a driven oscillation. The acoustic phase is measured interferometrically with continuous wave radiation at about 77 GHz. Typical oscillation amplitudes are about 1 μm, which is close to the human perception level. The technique provides no insight into the concealed item's material properties. It exclusively shows whether or not an object is hidden, which is the most relevant information for many sensing applications.

Citation Download Citation

Federico Buersgens, Guillermo Acuna, and Roland Kersting "Terahertz imaging of concealed objects by acoustic phase detection", Proc. SPIE 6949, Terahertz for Military and Security Applications VI, 694905 (15 April 2008); https://doi.org/10.1117/12.776862

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