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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 14 — Jul. 9, 2007
  • pp: 8838–8843

Millimeter wave probing of the acoustic phase for concealed object detection

F. Buersgens, G. Acuna, and R. Kersting  »View Author Affiliations

Optics Express, Vol. 15, Issue 14, pp. 8838-8843 (2007)

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We developed a far infrared technique for detecting objects that are concealed behind a barrier, which is opaque for visible light. The technique makes use of the fact that mechanically coupled objects can be distinguished by their acoustic phase during a driven vibration. The pattern of the acoustic phase is imaged using 70 GHz radiation. The experimental data demonstrate that virtually all objects can be sensed, which includes metals as well as dielectric materials.

© 2007 Optical Society of America

OCIS Codes
(110.3080) Imaging systems : Infrared imaging
(110.5120) Imaging systems : Photoacoustic imaging
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(330.4150) Vision, color, and visual optics : Motion detection

ToC Category:
Imaging Systems

Original Manuscript: May 10, 2007
Revised Manuscript: June 14, 2007
Manuscript Accepted: June 26, 2007
Published: June 28, 2007

Virtual Issues
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics

F. Buersgens, G. Acuna, and R. Kersting, "Millimeter wave probing of the acoustic phase for concealed object detection," Opt. Express 15, 8838-8843 (2007)

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  1. J. Bjarnason, T. Chan, A. Lee, M. Celis, and E. Brown, "Millimeter-wave, terahertz, and mid-infrared transmission through common clothing," Appl. Phys. Lett. 85, 519 (2004). [CrossRef]
  2. J. F. Federici, B. Schulkin, F. Huang, D. Gray, R. Barat, F. Oliveira, and D. Zimar, "THz imaging and sensing for security applications-explosives, weapons and drugs," Semicond. Sci. Technol. 20, S266 (2005). [CrossRef]
  3. D. Zimdars, "Fiber-pigtailed terahertz time domain spectroscopy instrumentation for package inspection and security imaging," in Terahertz for Military and Security Applications, R. Hwu and D. Woolard, eds., (SPIE, 2003) Vol. 5070. [CrossRef]
  4. H. D. Griffiths and C. J. Baker, "Radar imaging for combating terrorism," in NATO Advanced Study Institute, http://www.nato-us.org/imaging2006/lecturers.html> (Springer, 2006).
  5. M. R. Scarfi, M. Romaneo, R. D. Pietro, O. Zeni, A. Doria, G. P. Gallerano, E. Giovenale, G. Messina, A. Lai, G. Campuria, D. Conglio, and M. D’Arienzo, "THz exposure of whole blood for the study of biological effects on human lymphocytes," J. Biol. Phys. 29, 171 (2003). [CrossRef]
  6. E. Berry, "Risk perception and safety issues," J. Biol. Phys. 29, 263 (2003). [CrossRef]
  7. B. Fischer, M. Hoffmann, H. Helm, G. Modjesch, and P. Jepsen, "Chemical recognition in terahertz time-domain spectroscopy and imaging," Semicond. Sci. Technol. 20, 246 (2005). [CrossRef]
  8. K. Kawase, Y. Ogawa, Y. Watanabe, and H. Inoue, "Non-destructive terahertz imaging of illicit drugs using spectral fingerprints," Opt. Express 11, 2549 (2003). [CrossRef] [PubMed]
  9. L. Ning, S. Jongling, S. Jinhai, L. Laishun, X. Xiaoyu, L. Meihong, and J. Yan, "Study of the THz spectrum of methamphetamine," Opt. Express 5, 6750 (2005). [CrossRef]
  10. Y. C. Shen, T. Lo, P. F. Taday, B. E. Cole, W. R. Tribe, and M. C. Kemp, "Detection and identification of explosives using terahertz pulsed spectroscopic imaging," Appl. Phys. Lett. 86, 241,116 (2005). [CrossRef]
  11. K. J. Siebert, T. Loffler, H. Quast, M. Thomson, T. Bauer, R. Leonhardt, S. Czasch, and H. G. Roskos, "Alloptoelectronic continuous wave THz imaging for biomedical applications," Phys. Med. Biol. 47, 3743 (2002). [CrossRef] [PubMed]
  12. T. Kleine-Ostmann, P. Knobloch, M. Koch, S. Hoffmann, M. Breede, M. Hofmann, G. Hein, K. Pierz, M. Sperling, and K. Donhuijsen, "Continuous-wave THz imaging," Electron. Lett. 37, 1461 (2001). [CrossRef]
  13. J. Darmo, V. Tamosiunas, G. Fasching, J. Kroll, K. Unterrainer, M. Beck, M. Giovanni, J. Faist, C. Kremser, and P. Debbage, "Imaging with a terahertz quantum cascade laser," Opt. Express 12, 1879 (2004). [CrossRef] [PubMed]
  14. R. Appleby, "Passive millimetre-wave imaging and how it differs from terahertz imaging," Phil. Trans. R. Soc. Lond. A 362, 379 (2004). [CrossRef]
  15. D. Zimdars and J. S. White, "Terahertz reflection imaging for package and personnel inspection," in Terahertz for Military and Security Applications, R. Hwu and D. Woolard, eds., (SPIE, 2004) Vol. 5411. [CrossRef]
  16. F. Buersgens, G. Acuna, and R. Kersting, "Acoustic phase imaging with terahertz radiation," Opt. Express 15, 4427 (2007). [CrossRef] [PubMed]
  17. J. C. Chen and S. Kaushik, "Terahertz interferometer that senses vibrations behind barriers," IEEE Photon. Technol. Lett. 19, 1041 (2007). [CrossRef]
  18. F. Buersgens et al., "Enhancing the sensitivity of phase contrast measurements," manuscript in preparation.
  19. D. Dieckmann, "Einfluss vertikaler mechanischer Schwingungen auf den Menschen," Internat. Z. angew. Physiol. einschl.Arbeitsphysiol. 16, 519 (1957).
  20. B. Harazin and J. Grzesik, "The transmission of vertical whole-body vibration to the body segments of standing subjects," J. Sound and Vib. 215, 775 (1998). [CrossRef]
  21. International Standard, ISO 2631-1 (1997). Second edition.

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