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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 31 — Nov. 1, 2009
  • pp: 5956–5969

Advanced short-wavelength infrared range-gated imaging for ground applications in monostatic and bistatic configurations

Endre Repasi, Peter Lutzmann, Ove Steinvall, Magnus Elmqvist, Benjamin Göhler, and Gregor Anstett  »View Author Affiliations


Applied Optics, Vol. 48, Issue 31, pp. 5956-5969 (2009)
http://dx.doi.org/10.1364/AO.48.005956


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Abstract

Some advanced concepts for gated viewing are presented, including spectral diversity illumination techniques, non-line-of-sight imaging, indirect scene illumination, and in particular setups in bistatic configurations. By using a multiple-wavelength illumination source target speckles could be substantially reduced, leading to an improved image quality and enhanced range accuracy. In non-line-of-sight imaging experiments we observed the scenery through the reflections in a window plane. The scene was illuminated indirectly as well by a diffuse reflection of the laser beam at different nearby objects. In this setup several targets could be spotted, which, e.g., offers the capability to look around the corner in urban situations. In the presented measuring campaigns the advantages of bistatic setups in comparison with common monostatic configurations are discussed. The appearance of shadows or local contrast enhancements as well as the mitigation of retroreflections supports the human observer in interpreting the scene. Furthermore a bistatic configuration contributes to a reduced dazzling risk and to observer convertness.

© 2009 Optical Society of America

OCIS Codes
(110.6150) Imaging systems : Speckle imaging
(280.3420) Remote sensing and sensors : Laser sensors

ToC Category:
Imaging Systems

History
Original Manuscript: May 11, 2009
Revised Manuscript: October 1, 2009
Manuscript Accepted: October 2, 2009
Published: October 23, 2009

Citation
Endre Repasi, Peter Lutzmann, Ove Steinvall, Magnus Elmqvist, Benjamin Göhler, and Gregor Anstett, "Advanced short-wavelength infrared range-gated imaging for ground applications in monostatic and bistatic configurations," Appl. Opt. 48, 5956-5969 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-31-5956


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