Raman
Portendo’s detection methods are based on Raman scattering which provides a unique
molecular signature enabling selective identification. The Raman scattering is triggered
by energizing the substance with directed energy from laser beams. Different techniques
are used to enhance the otherwise weak Raman signal.
(C.V.Raman was awarded the 1930 Nobel Prize in Physics for his discovery).
Stand-Off Detection of Explosives
Image courtesy of FOI
In Stand-off Detection unknown substances are detected and identified at a safe
distance between the object and the detector/operator.
To identify an unknown substance a laser beam is aimed at the object and the Raman
scatter of the reflected light is detected and analyzed. The resulting signature
is matched with a database enabling identification of the unknown substance.
Trace Detection of Explosives
In Trace Detection unknown substances are detected and identified by analyzing aerosol
samples (vapor).
Substances are identified by collecting and analyzing vapor using a laser beam and
Raman scattering enhancing techniques. The resulting signature is matched with signatures
stored in a database for identification of the substance. The components for aerosol
collection, laser light emission and scattered light analysis are all integrated
into one device.