Standoff Detection of Plastics

2021 ◽  
Vol MA2021-02 (56) ◽  
pp. 1663-1663
Author(s):  
Yaoli Zhao ◽  
Catherine Canfield ◽  
Siyu Cui ◽  
Thomas Thundat
Keyword(s):  
Standoff Detection

Standoff Detection of Explosives Using Luminescent Particles

2011 ◽  
Author(s):  
Timothy Swager
Keyword(s):  
Standoff Detection ◽  
Detection Of Explosives

Short-range biological standoff detection system (SR-BSDS)

2000 ◽  
Author(s):  
V. James Cannaliato ◽  
Bruce W. Jezek ◽  
Larry Hyttinen ◽  
John B. Strawbridge ◽  
William J. Ginley
Keyword(s):  
Short Range ◽  
Detection System ◽  
Standoff Detection

RARE-EARTH DOPED POTASSIUM LEAD BROMIDE MID-IR LASER SOURCES FOR STANDOFF DETECTION

2008 ◽  
Vol 18 (03) ◽  
pp. 735-745 ◽  
Author(s):  
KRISHNA C. MANDAL ◽  
SUNG H. KANG ◽  
MICHAEL CHOI ◽  
R. DAVID RAUH
Keyword(s):  
Rare Earth ◽  
Emission Spectra ◽  
Optical Quality ◽  
Scanning Calorimetry ◽  
Laser Applications ◽  
Excellent Thermal Stability ◽  
Standoff Detection ◽  
Lead Bromide ◽  
Vertical Bridgman ◽  
Laser Crystals

The single crystal growth of KPb 2 Br 5 by vertical Bridgman technique using in-house processed zone refined PbBr 2 and KBr with rare-earth terbium doping has been studied. The grown moisture resistant crystals (1.5 cm diameter and 10 cm length) have shown high promise for low phonon energy room temperature solid-state laser applications in the longer side of mid-IR (4-15 µm) due to their high storage lifetimes, wide tunability, and excellent optical quality. The processed crystals are highly transparent ( T = ≥80%) in the 0.4-25 µm spectral region. Repeated melting-freezing cycles during differential scanning calorimetry (DSC) experiments did not reveal any appreciable variation in the melting point or phase transitions, which is indicative of their excellent thermal stability. The emission spectra pumped with a 2 µm source show broadband emissions with peak wavelength of 3 µ m (7 F 4→ 7 F6), 5µ m (7 F 5→ 7 F 6) and 7.9µ m (7 F 4→ 7 F 5). The KPb 2 Br 5: Tb laser crystals will be highly useful for standoff detection of incoming chemical and biological threats using unique infrared absorption signatures.

Dual-particle imager for standoff detection of special nuclear material

2011 ◽  
Author(s):  
J. Kyle Polack ◽  
Alexis Poitrasson-Riviere ◽  
Michael C. Hamel ◽  
Kiyotaka Ide ◽  
Kyle L. McMillan ◽  
...  
Keyword(s):  
Nuclear Material ◽  
Standoff Detection

A new 'semi-active' method for chemical standoff detection

2004 ◽  
Author(s):  
Tim J. Johnson ◽  
Bruce A. Roberts ◽  
Gerry P. Morgen ◽  
Michael A. Hughes ◽  
Corey D. Heitschmidt ◽  
...  
Keyword(s):  
Active Method ◽  
Standoff Detection

EXPRESS: Spectral Considerations for Standoff Infrared Detection of RDX on Reflective Aluminum

2021 ◽  
pp. 000370282110538
Author(s):  
Kevin J Major ◽  
Jas Sanghera ◽  
Mikella E. Farrell ◽  
Ellen L Holthoff ◽  
Paul M Pellegrino ◽  
...  
Keyword(s):  
Surface Concentration ◽  
Thin Layers ◽  
Infrared Detection ◽  
Aluminum Surface ◽  
Material System ◽  
Spectral Signatures ◽  
Spectral Changes ◽  
Standoff Detection ◽  
Infrared Spectrometer ◽  
Specific Material

This paper examines infrared spectroscopic effects for the standoff detection of an explosive material, hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), inkjet printed on an aluminum surface. Results of a spectroscopic study are described, using multiple optical setups. These setups were selected to explore how variations in the angles of incidence and collection from the surface of the material result in corresponding variations in the spectral signatures. The goal of these studies is to provide an understanding of these spectral changes, since it affects standoff detection of hazardous materials on a reflective substrate. We demonstrate that variations in spectral effects are dependent on the relative surface concentration of the deposited RDX. We also show that it is reasonable to use spectroscopic data collected in a standard laboratory infrared spectrometer outfitted with a variable angle reflectometer set at 0 as reference spectra for data collected in a standoff configuration. These results are important to provide a systematic approach to understanding IR spectra collection using standoff systems in the field, and to allow for comparison between such data, and data collected in the laboratory. Though the precise results are constrained to a specific material system (thin layers on a reflective substrate), the approach and general discussion provided are applicable to a broad range of IR standoff sensing techniques and applications.

scholarly journals Deep Raman spectroscopy for the non-invasive standoff detection of concealed chemical threat agents

Talanta ◽  
2012 ◽  
Vol 94 ◽  
pp. 342-347 ◽  
Author(s):  
Emad L. Izake ◽  
Biju Cletus ◽  
William Olds ◽  
Shankaran Sundarajoo ◽  
Peter M. Fredericks ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Non Invasive ◽  
Standoff Detection

Chemoselective Salisbury Screen Absorbers for passive standoff detection of analytes

2008 ◽  
Author(s):  
M.G. Bray ◽  
A. Kovalev ◽  
D.H. Werner ◽  
T.S. Mayer ◽  
L. Takiff
Keyword(s):  
Standoff Detection

Optical Standoff Detection: Eliminating Threats at a Distance

2013 ◽  
Vol 24 (10) ◽  
pp. 36
Author(s):  
Lynn Savage
Keyword(s):  
Standoff Detection
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