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Proceedings Paper

Whole-field laser vibrometer for buried land mine detection
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Paper Abstract

This paper discusses the development and performance of a multi-beam laser Doppler vibrometer specifically designed to locate buried landmines with a laser-acoustic technique. The device aims at increasing the speed of landmine detection with this technique by at least one order of magnitude. The present system is capable of simultaneously probing sixteen positions on the ground over a span of one meter, and of measuring the ground velocity at each of these positions with a velocity resolution of about 1 micrometers /s. This architecture could also be scaled to a larger number of beams or into two dimensions. The present system uses a low (100 kHz) carrier frequency, which enables digital signal processing in a simple architecture. This paper also discusses a numerical model to simulate and predict the performance of the multi-beam vibrometer. In particular, the model attempts to address issues associated with speckle dropout, signal/noise, and maximum scanning velocity.

Paper Details

Date Published: 13 August 2002
PDF: 9 pages
Proc. SPIE 4742, Detection and Remediation Technologies for Mines and Minelike Targets VII, (13 August 2002); doi: 10.1117/12.479135
Show Author Affiliations
Amit K. Lal, MetroLaser, Inc. (United States)
Cecil F. Hess, MetroLaser, Inc. (United States)
Hansheng Zhang, MetroLaser, Inc. (United States)
Ernesto Hurtado, MetroLaser, Inc. (United States)
Vyacheslav Aranchuk, MetroLaser, Inc. (United States)
Vladimir B. Markov, MetroLaser, Inc. (United States)
William T. Mayo Jr., Extended Vision, Inc. (United States)

Published in SPIE Proceedings Vol. 4742:
Detection and Remediation Technologies for Mines and Minelike Targets VII
J. Thomas Broach; Russell S Harmon; Gerald J. Dobeck, Editor(s)

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