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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 20 — Sep. 28, 2009
  • pp: 17812–17817

Adaptive terahertz imaging using a virtual transceiver and coherence weighting

Zhuopeng Zhang and Takashi Buma  »View Author Affiliations

Optics Express, Vol. 17, Issue 20, pp. 17812-17817 (2009)

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We demonstrate an adaptive reconstruction technique to significantly improve the depth of focus and contrast of three-dimensional reflection-mode terahertz imaging. A laterally scanned virtual transceiver element records reflections from the object of interest. A synthetic aperture focusing technique maintains fine spatial resolution over a large image depth. Measuring the spatial coherence of the received signals across the transceiver aperture provides a non-iterative self-adaptive approach to significantly improve image contrast. Test images show a spatial resolution of 0.4 mm maintained over a 16 mm depth of field, and up to a 30 dB improvement in signal-to-noise ratio.

© 2009 OSA

OCIS Codes
(110.5100) Imaging systems : Phased-array imaging systems
(110.1085) Imaging systems : Adaptive imaging
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

Original Manuscript: August 3, 2009
Revised Manuscript: September 16, 2009
Manuscript Accepted: September 17, 2009
Published: September 18, 2009

Zhuopeng Zhang and Takashi Buma, "Adaptive terahertz imaging using a virtual transceiver and coherence weighting," Opt. Express 17, 17812-17817 (2009)

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