Real Time Parallel Channel Spectrometer for 3D Cloud Profiling

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$748,154.00
Award Year:
2007
Program:
STTR
Phase:
Phase II
Contract:
W911SR-07-C-0089
Award Id:
77074
Agency Tracking Number:
A064-023-0264
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
461 Boston Street, Topsfield, MA, 01983
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
038336723
Principal Investigator:
Julia Rentz Dupuis
Systems Engineer
(978) 887-6600
jrentz@optra.com
Business Contact:
James Engel
President
(978) 887-6600
jengel@optra.com
Research Institution:
UNIV. OF NORTH CAROLINA
Dianne Sanford
Dept of Environmental Sciences
104 airport Drive, Suite 2200
Chapel Hill, NC, 27599-1350
(919) 966-3411
Nonprofit college or university
Abstract
OPTRA proposes the development of an imaging open-path Fourier transform infrared (I-OP-FTIR) spectrometer for 3D cloud profiling. The system employs a single modulator and a novel optical configuration which projects an array of angularly dispersed IR beams, each of which exhibits comparable throughput to a single channel OP-FTIR, to an array of respective retroreflector arrays remotely located at the opposite side of the test grid. The return light from each retroreflector array is imaged onto respective detectors that record the spatially-resolved interferograms which are subsequently transformed and analyzed for molecular content via advanced multicomponent algorithms. The result is a capability to sensitively, quantitatively, and simultaneously measure the molecular absorbance and associated concentration-pathlength of an open release plume over an array of spatial regions. Use of two or more I-OP-FTIR sensors around the perimeter of the release allows for tomographic reconstruction of the concentration map of each molecular species contained in the plume. OPTRA has teamed with the University of North Carolina, Department of Public Health, who brings extensive experience in computed tomography for this type of measurement. Phase II activities include the build and test of a prototype sensor and demonstration of the tomographic reconstruction capabilities on a simulant plume

* information listed above is at the time of submission.

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