Journal article
Terahertz Imaging Systems With Aperture Synthesis Techniques
Department of Electrical Engineering, Technical University of Denmark1
Microwaves and Remote Sensing, National Space Institute, Technical University of Denmark2
National Space Institute, Technical University of Denmark3
Teraherts Technologies and Biophotonics, Department of Photonics Engineering, Technical University of Denmark4
Department of Photonics Engineering, Technical University of Denmark5
Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark6
This paper presents the research and development of two terahertz imaging systems based on photonic and electronic principles, respectively. As part of this study, a survey of ongoing research in the field of terahertz imaging is provided focusing on security applications. Existing terahertz imaging systems are reviewed in terms of the employed architecture and data processing strategies.
Active multichannel measurement method is found to be promising for real-time applications among the various terahertz imaging techniques and is chosen as a basis for the imaging instruments presented in this paper. An active system operation allows for a wide dynamic range, which is important for image quality.
The described instruments employ a multichannel high-sensitivity heterodyne architecture and aperture filling techniques, with close to real-time image acquisition time. In the case of the photonic imaging system, mechanical scanning is completely obsolete. We show 2-D images of simulated 3-D image data for both systems.
The reconstruction algorithms are suitable for 3-D real-time operation, only limited by mechanical scanning.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2010 |
| Pages: | 2027-2039 |
| ISSN: | 15579670 and 00189480 |
| Types: | Journal article |
| DOI: | 10.1109/TMTT.2010.2050246 |
| ORCIDs: | Dall, Jørgen , Kusk, Anders , Jepsen, Peter Uhd , Zhurbenko, Vitaliy and Jensen, Thomas |
Femtosecond systems photonic detectors photonic systems submillimeter-wave imaging submillimeter-wave technology synthetic aperture imaging synthetic aperture radar terahertz imaging
Apertures Data processing Data security Dynamic range Filling Image quality Instruments Optical imaging Research and development Submillimeter wave measurements active multichannel measurement method aperture synthesis techniques electronic principles mechanical scanning photonic imaging system photonic principles submillimetre wave imaging terahertz imaging systems terahertz wave imaging
