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Proceedings Paper

Whole-field digital vibrometer system for buried landmine detection
Author(s): Amit Lal; Cecil Hess; Eddie Scott; Michael Dang; Robert Nichols
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Paper Abstract

Previous results have shown the potential of acoustic-to-seismic coupling with Laser Doppler Vibrometry for the detection of buried landmines. An important objective of the present technology is to improve the spatial resolution and the speed of the measurement. In this paper, MetroLaser reports on a whole-field digital vibrometer (WDV) that measures an entire one meter area with sub-centimeter spatial resolution in just a few seconds. The WDV is based on a dual-pulsed laser such that each pulse illuminates a one meter area on the ground, and the temporal separation between the two laser pulses can be adjusted to match the ground excitation frequency. By sweeping this excitation frequency, a displacement map of the ground at each frequency can be quickly generated. In addition, an innovative speckle repositioning strategy allows for movement of the measurement platform at reasonable speeds while still obtaining measurements with interferometric precision. This paper describes the WDV instrument and presents preliminary experimental results obtained with this system. This research is being supported by the U.S. Army RDECOM CERDEC NVESD under Contract W909MY04-C-0004.

Paper Details

Date Published: 10 June 2005
PDF: 10 pages
Proc. SPIE 5794, Detection and Remediation Technologies for Mines and Minelike Targets X, (10 June 2005); doi: 10.1117/12.604048
Show Author Affiliations
Amit Lal, MetroLaser, Inc. (United States)
Cecil Hess, MetroLaser, Inc. (United States)
Eddie Scott, MetroLaser, Inc. (United States)
Michael Dang, MetroLaser, Inc. (United States)
Robert Nichols, MetroLaser, Inc. (United States)

Published in SPIE Proceedings Vol. 5794:
Detection and Remediation Technologies for Mines and Minelike Targets X
Russell S. Harmon; J. Thomas Broach; John H. Holloway, Editor(s)

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