Terahertz wave scanned imaging system for threat detection at standoff distances

Yıldırım, İhsan Ozan
Özkan, Vedat Ali
İdikut, Fırat
Takan, Taylan
Şahin, Asaf Behzat
Altan, Hakan
Due to their non-ionizing nature and penetration capabilities, terahertz to millimeter waves have been attracting attention for security applications such as threat and concealed object detection, along with material characterization and non-destructive imaging applications. Due to limited number of array detection schemes operating within this range, imaging schemes with scan architectures are typically employed, where the optical design which accompanies transceiver electronics plays an important part. Single pixel, scanned imaging systems also depend on image processing and reconstruction steps to compensate optical distortions and limited resolution characteristics. Moreover, various post processing techniques are being used for detection of threat/concealed objects within the imaged scene. In this work, we present a terahertz active scanned imaging system for threat detection at standoff distances. The system design incorporates two separate transceiver units, hence it is capable of operating at two different frequencies by switching from one to the other. A preliminary work reporting early development stages of this study has been reported before, where characteristics of the optical system have been tested by constructing image of a metal object at a distance of ~1m.
Citation Formats
İ. O. Yıldırım, V. A. Özkan, F. İdikut, T. Takan, A. B. Şahin, and H. Altan, “Terahertz wave scanned imaging system for threat detection at standoff distances,” presented at the PHOTONICA 2015 (24 - 28 Ağustos 2015), Belgrade, Serbia, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/78331.