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C. Gasser, J. Ofner, B. Lendl:
"Stand-Off Hyperspectral Raman Imaging";
Poster: IRDG Christmas Meeting 2016, London; 19.12.2016.

Stand-off Raman spectroscopy is a versatile tool in a
range of fields of application, such as safety investigations
(detection of explosives at safe distances) or geosciences
(planetary exploration). During the project "OPTIX" (FP7)
we showed that the detection of small amounts of
explosives and hazardous chemicals at distance of 100 m
is possible even through opaque containers. Here, we
present a different approach to remote Raman sensing
emplyoing hyperspectral Raman spectroscopy. The
classical grating as a dispersion element is exchanged in
favor of a liquid crystal tunable filter (LCTF), which allows
direct imaging of a selected Raman shift onto the
intensified CCD (iCCD). This maintains a high degree of
local information and allows for higher troughput, as
whole areas can be imaged at once.
IN this poster we show our first prototype as well as first
measurement results on a reference sample consisting of
different polymers. Chemometrics are then applied to
extract chemical information from the large dataset.

Raman spectroscopy, stand-off, remote, explosives

http://publik.tuwien.ac.at/files/publik_255481.pdf