Terahertz Digital Holographic Imaging of Voids Within Visibly Opaque Dielectrics
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Terahertz digital off-axis holography (THzDH) has been demonstrated as a non-destructive tool for imaging voids within visually opaque dielectrics. Using a raster scanning heterodyne detector, the imager captures lensless transmission holograms formed by the interaction of a highly coherent, monochromatic beam with 3-D printed structures. Digital hologram reconstructions from two structures were used to measure the imager's modulation transfer function and to show that terahertz digital holography can provide sub-millimeter resolution images of voids within visually opaque printed structures. As a demonstration we imaged embedded air- and lossy dielectric filled-voids whose refractive indices differ from the host material.
Published Version (Please cite this version)10.1109/TTHZ.2014.2364511
Publication InfoEveritt, Henry; Gehm, ME; Golish, DR; Heimbeck, Martin S; & Ng, WR (2014). Terahertz Digital Holographic Imaging of Voids Within Visibly Opaque Dielectrics. IEEE Transactions on Terahertz Science and Technology. 10.1109/TTHZ.2014.2364511. Retrieved from http://hdl.handle.net/10161/13870.
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Adjunct Professor of Physics
Dr. Everitt is one of the Army's chief scientists. He works at the Army's Aviation and Missile RD&E Center at Redstone Arsenal, AL. Through his adjunct appointment in the Duke Physics Department, he leads an active experimental research group in condensed matter physics, nanophotonics, molecular physics, and novel terahertz imaging with colleagues on campus and through an international network of collaborators. Four principal research areas are being pursued: 1) Ultrafast Spectroscopy.