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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 33, Iss. 9 — May. 1, 2008
  • pp: 974–976

Terahertz imaging with compressed sensing and phase retrieval

Wai Lam Chan, Matthew L. Moravec, Richard G. Baraniuk, and Daniel M. Mittleman  »View Author Affiliations


Optics Letters, Vol. 33, Issue 9, pp. 974-976 (2008)
http://dx.doi.org/10.1364/OL.33.000974


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Abstract

We describe a novel, high-speed pulsed terahertz (THz) Fourier imaging system based on compressed sensing (CS), a new signal processing theory, which allows image reconstruction with fewer samples than traditionally required. Using CS, we successfully reconstruct a 64 × 64 image of an object with pixel size 1.4 mm using a randomly chosen subset of the 4096 pixels, which defines the image in the Fourier plane, and observe improved reconstruction quality when we apply phase correction. For our chosen image, only about 12% of the pixels are required for reassembling the image. In combination with phase retrieval, our system has the capability to reconstruct images with only a small subset of Fourier amplitude measurements and thus has potential application in THz imaging with cw sources.

© 2008 Optical Society of America

OCIS Codes
(320.7100) Ultrafast optics : Ultrafast measurements
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

History
Original Manuscript: January 28, 2008
Manuscript Accepted: March 5, 2008
Published: April 28, 2008

Citation
Wai Lam Chan, Matthew L. Moravec, Richard G. Baraniuk, and Daniel M. Mittleman, "Terahertz imaging with compressed sensing and phase retrieval," Opt. Lett. 33, 974-976 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-9-974


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