Open AccessMillimeter wave probing of the acoustic phase for concealed object detection
Author(s) -
F. Buersgens,
Guillermo P. Acuna,
R. Kersting
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.008838
Subject(s) - opacity , optics , millimeter , phase (matter) , acoustics , extremely high frequency , radiation , infrared , materials science , physics , quantum mechanics
We developed a far infrared technique for detecting objects that are concealed behind a barrier, which is opaque for visible light. The technique makes use of the fact that mechanically coupled objects can be distinguished by their acoustic phase during a driven vibration. The pattern of the acoustic phase is imaged using 70 GHz radiation. The experimental data demonstrate that virtually all objects can be sensed, which includes metals as well as dielectric materials.