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.
© 2009 The Optical Society
Z. Zhang and T. Buma, "Improved THz Imaging with a Virtual-Source Based Synthetic Aperture Focusing Technique and Coherence Weighting," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper JWA16.
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