Maryland's Defense Patent Database

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Spectrophotopolarimeter sensor and artificial neural network analytics for distant chemical and biological threat detection

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AECBC

A system, apparatus, and method of generating Stokes vectors, a Mueller matrix, and polarized scattering from an aerosol aggregate includes providing an incident infrared laser beam; causing the incident infrared laser beam to be polarization-modulated using variable stress/strain birefringence imposed on a ZnSe crystal; defining a Stokes vector associated with the incident infrared laser beam; scattering the incident infrared laser beam from an aggregate aerosol comprising interferents and analyte particles; producing a scattered-beam reactant Stokes vector by causing the scattered incident infrared laser beam to be polarization-modulated; generating a Mueller matrix by taking a transformation of the Stokes vector; and identifying the analyte using the Mueller matrix. The Mueller matrix may comprise M-elements that are functions of a wavelength of the infrared laser beam, backsattering orientation of the infrared laser beam, and a shape and size of the interferents and analyte particles.

Inventors: 
Carrieri, Arthur H.; Copper, Jack; Owens, David J.; Roese, Erik S.; Bottiger, Jerold R.; Hung, Kevin C.
Patent Number: 
Technical domain: 
Sensors and Measurement
FIle Date: 
2010-01-06
Grant Date: 
2013-08-20
Grant time: 
1,322 days
Grant time percentile rank: 
24
Claim count percentile rank: 
6
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
UNITED STATES OF AMERICA