Research Papers

Photopolarimetric lidar dual-beam switching device and Mueller matrix standoff detection method

[+] Author Affiliations
Arthur H. Carrieri

U.S. Army RDECOM ECBC

David J. Owens

Quetron Systems, Inc.

Erik S. Roese

U.S. Army RDECOM ECBC

Kevin C. Hung, Pascal I. Lim

Advanced Technologies and Applications, Inc.

Jonathan C. Schultz

Quetron Systems, Inc.

Jerold R. Bottiger

U.S. Army RDECOM ECBC

Michael V. Talbard

Quetron Systems, Inc.

J. Appl. Remote Sens. 1(1), 013502 (January 18, 2007). doi:10.1117/1.2535860
History: Received October 30, 2006; Revised January 17, 2007; Accepted January 17, 2007; January 18, 2007; Online January 19, 2007
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Abstract

We present an optomechanical switching device (OSD) for a photopolarimetric lidar system with differential-absorption Mueller matrix spectroscopy standoff detection method. An output train of alternate continuous-wave CO2 laser beams [...L1:L2...] is directed onto suspect chemical-biological (CB) aerosol plume or the land mass it contaminates (S) vis-a`-vis the OSD, where L1 [L2] is tuned on [detuned off] a resonant molecular absorption moiety of CB analyte. Moreover, both incident beams and their backscattered radiances, from S, are polarization-modulated synchronously so as to produce gated temporal voltage waveforms called scattergrams recorded on focus at the receiver end of polarization lidar sensor system. All 16 elements of the Mueller matrix (Mij) of S are measured via digital or analog filtration of constituent frequency components in these running scattergram data streams (phase-sensitive detection). A collective set of normalized differential elements {ΔMi,j} (ratioed to element M11) that are susceptible to the analyte, probed on-then-off its molecular absorption band, form a unique detection domain that is scrutinized. Any mapping onto this domain in Mueller-space, from incoming sensor scattergram data sets preprocessed by algorithm and forwarded through a trained neural network pattern recognition system, cues a standoff detection event.

© 2007 Society of Photo-Optical Instrumentation Engineers

Citation

Arthur H. Carrieri ; David J. Owens ; Erik S. Roese ; Kevin C. Hung ; Pascal I. Lim, et al.
"Photopolarimetric lidar dual-beam switching device and Mueller matrix standoff detection method", J. Appl. Remote Sens. 1(1), 013502 (January 18, 2007). ; http://dx.doi.org/10.1117/1.2535860


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