Title :
Improved THz imaging with a virtual-source based synthetic aperture focusing technique and coherence weighting
Author :
Zhang, Z. ; Buma, T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
Abstract :
We combine a virtual-source based synthetic aperture focusing technique with coherence weighting to overcome the limited depth-of-focus of high numerical aperture THz optics. Images show depth-independent spatial resolution and a 14 dB improvement in SNR.
Keywords :
optical focusing; terahertz wave imaging; THz imaging; THz optics; coherence weighting; depth-independent spatial resolution; depth-of-focus; numerical aperture; synthetic aperture focusing; virtual source; Adaptive optics; Focusing; High-resolution imaging; Image quality; Optical arrays; Optical imaging; Optical noise; Signal resolution; Spatial resolution; Testing; (110.5100) Phased-array imaging systems; (110.6795) Terahertz imaging;
Conference_Titel :
Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-55752-869-8
Electronic_ISBN :
978-1-55752-869-8
