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This paper investigates the prospects of "seeing around the corner" using active imaging. A monostatic active imaging
system offers interesting capabilities in the presence of glossy reflecting objects. Examples of such surfaces are windows
in buildings and cars, calm water, signs and vehicle surfaces. During daylight it might well be possible to use mirrorlike
reflection by the naked eye or a CCD camera for non-line of sight imaging. However the advantage with active imaging
is that one controls the illumination. This will not only allow for low light and night utilization but also for use in cases
where the sun or other interfering lights limit the non-line of sight imaging possibility. The range resolution obtained by
time gating will reduce disturbing direct reflections and allow simultaneous view in several directions using range
discrimination.
Measurements and theoretical considerations in this report support the idea of using laser to "see around the corner".
Examples of images and reflectivity measurements will be presented together with examples of potential system
applications.
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Ove Steinvall, Magnus Elmqvist, Håkan Larsson, "See around the corner using active imaging," Proc. SPIE 8186, Electro-Optical Remote Sensing, Photonic Technologies, and Applications V, 818605 (5 October 2011); https://doi.org/10.1117/12.893605