Terahertz digital holographic imaging of visibly opaque printed dielectrics

Author

Heimbeck, Martin S. ; Ng, Wei-Ren ; Golish, Dathon R. ; Gehm, Michael E. ; Everitt, Henry O.

Author_Institution

Army Aviation & Missile RD&E Center, Redstone Arsenal, AL, USA

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

Terahertz digital off-axis holography has been demonstrated as a non-destructive imaging tool for three-dimensional (3D) printed structures. Digital holographic reconstructions from two structures were used to measure the imager´s modulation transfer function and to show that terahertz digital holography can provide submillimeter resolution images of visually opaque printed structures and map their interior. As a demonstration we report on the detection of embedded air voids and material inclusions that differ from the host material in their complex refractive indices.

Keywords

dielectric materials; image reconstruction; microwave holography; refractive index; terahertz wave imaging; transfer functions; voids (solid); 3D printed structures; complex refractive indices; digital holographic reconstructions; embedded air void detection; imager modulation transfer function; material inclusions; nondestructive imaging tool; submillimeter resolution images; terahertz digital holographic imaging; terahertz digital off-axis holography; visibly opaque printed dielectrics; Dielectrics; Holography; Image reconstruction; Image resolution; Optics; Receivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956276

Filename

6956276