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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: Franco Gori
  • Vol. 27, Iss. 1 — Jan. 1, 2010
  • pp: 131–140

Millimeter wave imaging system modeling: spatial frequency domain calculation versus spatial domain calculation

Feng Qi, Vahid Tavakol, Ilja Ocket, Peng Xu, Dominique Schreurs, Jinkuan Wang, and Bart Nauwelaers  »View Author Affiliations


JOSA A, Vol. 27, Issue 1, pp. 131-140 (2010)
http://dx.doi.org/10.1364/JOSAA.27.000131


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Abstract

Active millimeter wave imaging systems have become a promising candidate for indoor security applications and industrial inspection. However, there is a lack of simulation tools at the system level. We introduce and evaluate two modeling approaches that are applied to active millimeter wave imaging systems. The first approach originates in Fourier optics and concerns the calculation in the spatial frequency domain. The second approach is based on wave propagation and corresponds to calculation in the spatial domain. We compare the two approaches in the case of both rough and smooth objects and point out that the spatial frequency domain calculation may suffer from a large error in amplitude of 50% in the case of rough objects. The comparison demonstrates that the concepts of point-spread function and f-number should be applied with careful consideration in coherent millimeter wave imaging systems. In the case of indoor applications, the near-field effect should be considered, and this is included in the spatial domain calculation.

© 2009 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(110.0110) Imaging systems : Imaging systems
(110.1650) Imaging systems : Coherence imaging
(110.2990) Imaging systems : Image formation theory

ToC Category:
Imaging Systems

History
Original Manuscript: June 2, 2009
Revised Manuscript: November 8, 2009
Manuscript Accepted: November 23, 2009
Published: December 24, 2009

Citation
Feng Qi, Vahid Tavakol, Ilja Ocket, Peng Xu, Dominique Schreurs, Jinkuan Wang, and Bart Nauwelaers, "Millimeter wave imaging system modeling: spatial frequency domain calculation versus spatial domain calculation," J. Opt. Soc. Am. A 27, 131-140 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-1-131

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