11 September 2003 Sound wave and laser excitation for acousto-optical landmine detection
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Abstract
Acoustic landmine detection (ALD) is a technique for the detection of buried landmines including non-metal mines. An important issue in ALD is the acoustic excitation of the soil. Laser excitation is promising for complete standoff detection using lasers for excitation and monitoring. Acoustic excitation is a more common technique that gives good results but requires an acoustic source close to the measured area. In a field test in 2002 both techniques were compared side by side. A number of buried landmines were measured using both types of excitation. Various types of landmines were used, both anti-tank and anti-personnel, which were buried at various depths in different soil types with varying humidity. Two Laser Doppler Vibrometer (LDV) systems of two different wavelengths for the different approaches were used, one based on a He-Ne laser at 0.633 μm with acoustic excitation and one on an erbium fiber laser at 1.54 μm in the case of laser excitation. The acoustic excitation gives a good contrast between the buried mine and the surrounding soil at certain frequencies. Laser excitation gives a pulse response that is more difficult to interpret but is potentially a faster technique. In both cases buried mines could be detected.
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Johan C. van den Heuvel, Johan C. van den Heuvel, Volker Klein, Volker Klein, Peter Lutzmann, Peter Lutzmann, Frank J. M. van Putten, Frank J. M. van Putten, Markus Hebel, Markus Hebel, H. M. A. Schleijpen, H. M. A. Schleijpen, "Sound wave and laser excitation for acousto-optical landmine detection", Proc. SPIE 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII, (11 September 2003); doi: 10.1117/12.487844; https://doi.org/10.1117/12.487844
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