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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 7 — Jul. 1, 2008
  • pp: 1716–1721

Comparison of speckle reduction diversity tools for active millimeter-wave imaging

Irina Jaeger, Johan Stiens, Lixao Zhang, Saiful Islam, Gaetan Koers, and Roger Vounckx  »View Author Affiliations


JOSA A, Vol. 25, Issue 7, pp. 1716-1721 (2008)
http://dx.doi.org/10.1364/JOSAA.25.001716


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Abstract

Imaging concealed objects with millimeter-wave coherent radiation is accompanied by speckle. Like all interference phenomena, speckle depends on three light parameters of the millimeter-wave laser beam—phase, wavelength, and angle of incidence—and can be reduced by the diversity of these three parameters. Diversity tools to improve images of concealed objects have been compared. We report measurements, simulations, and image reconstruction results over the whole W-band ( 75 110 GHz ) and demonstrate where each tool works the best. Multiphase diversity is successful in reducing speckle contrast: multiangle to improve the image quality, and multispectral to recognize a small object’s features. A simple postprocessing eliminates the areas still covered by interference.

© 2008 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.4280) Coherence and statistical optics : Noise in imaging systems
(030.6140) Coherence and statistical optics : Speckle
(100.0100) Image processing : Image processing

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: March 18, 2008
Revised Manuscript: May 6, 2008
Manuscript Accepted: May 20, 2008
Published: June 25, 2008

Citation
Irina Jaeger, Johan Stiens, Lixao Zhang, Saiful Islam, Gaetan Koers, and Roger Vounckx, "Comparison of speckle reduction diversity tools for active millimeter-wave imaging," J. Opt. Soc. Am. A 25, 1716-1721 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-7-1716

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