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Proceedings Paper

Vibration imagery of remote objects
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Paper Abstract

Laser vibrometry based on coherent detection technique allows to measure vibration characteristics of objects, based on its high Doppler resolution. Point targets were measured up to 40 km under medium turbluence conditions. Specifically vibration imaging offers an extensive potential for short-range civil applications and for long-range target classification and identification. For short range applications (up to few meters distance) laser vibrometry is used for investigating and testing of all kind of mechanical structures with respect to their vibration characteristics. Laser-Doppler based acoustic-to-seismic detection of buried mines shows a potential of this attractive technique at short range, mostly based on λ = 632 nm (HeNe laser). At longer ranges, the wavelengths of λ = 10.6 μm (CO2 laser) and λ = 1.5 μm (erbium fiber laser) are of interest, because of laser safety and better beam propagation through the atmosphere. Examples of the vibrometry technique with and without spatial resolution capability are shown here.

Paper Details

Date Published: 9 December 2002
PDF: 10 pages
Proc. SPIE 4821, Free-Space Laser Communication and Laser Imaging II, (9 December 2002); doi: 10.1117/12.452042
Show Author Affiliations
Reinhard R. Ebert, FGAN-Forschungsinstitut fuer Optronik und Mustererkennung (Germany)
Peter Lutzmann, FGAN-Forschungsinstitut fuer Optronik und Mustererkennung (Germany)

Published in SPIE Proceedings Vol. 4821:
Free-Space Laser Communication and Laser Imaging II
Jennifer C. Ricklin; David G. Voelz, Editor(s)

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