Title :
Passive stand-off THz imaging using lock-in phase information
Author :
Augustin, Sven ; Bretfeld, R. ; Bottger, Ulrich ; Hirsch, Holger ; Richter, H. ; Semenov, Alexander ; Hubers, Heinz-Wilhelm
Author_Institution :
Inst. fur Opt. und Atomare Phys., Tech. Univ. Berlin, Berlin, Germany
Abstract :
A method for directly detecting edges in images which are obtained with a passive stand-off terahertz (THz) imaging system is presented. This novel method can improve the signal-to-noise ratio of THz images as well as it may contribute to solving the privacy problem of body scanners. In addition the proposed method when used with a suitable Spatial Light Modulator (SLM) allows imaging in the lock-in phase space where the trade-off between detection robustness and temperature resolution can be adapted to the situation at hand.
Keywords :
edge detection; spatial light modulators; terahertz wave imaging; body scanners; edges detection; lock-in phase information; passive stand-off THz imaging; signal-to-noise ratio; spatial light modulator; Explosives; Mirrors; Phase measurement; Photonics; Privacy; Receivers; Switches;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665770
