<s>
Spatially	B-Algorithm
offset	I-Algorithm
Raman	I-Algorithm
spectroscopy	I-Algorithm
(	O
SORS	O
)	O
is	O
a	O
variant	O
of	O
Raman	B-Algorithm
spectroscopy	I-Algorithm
that	O
allows	O
highly	O
accurate	O
chemical	O
analysis	O
of	O
objects	O
beneath	O
obscuring	O
surfaces	O
,	O
such	O
as	O
tissue	O
,	O
coatings	O
and	O
bottles	O
.	O
</s>
<s>
Raman	B-Algorithm
spectroscopy	I-Algorithm
relies	O
on	O
inelastic	O
scattering	O
events	O
of	O
monochromatic	O
light	O
to	O
produce	O
a	O
spectrum	O
characteristic	O
of	O
a	O
sample	O
.	O
</s>
<s>
Conventional	O
Raman	B-Algorithm
spectroscopy	I-Algorithm
is	O
limited	O
to	O
the	O
near-surface	O
of	O
diffusely	O
scattering	O
objects	O
.	O
</s>
<s>
Raman	B-Algorithm
spectroscopy	I-Algorithm
is	O
used	O
for	O
this	O
purpose	O
in	O
many	O
applications	O
where	O
its	O
high	O
chemical	O
specificity	O
enables	O
chemical	O
mapping	O
of	O
surfaces	O
,	O
e.g.	O
,	O
tablet	O
mapping	O
.	O
</s>
<s>
When	O
multi-variate	O
techniques	O
,	O
such	O
as	O
principal	B-Application
component	I-Application
analysis	I-Application
are	O
used	O
,	O
it	O
is	O
necessary	O
to	O
take	O
several	O
spectra	O
at	O
varied	O
offset	O
distances	O
.	O
</s>
<s>
Micro-spatially	B-Algorithm
offset	I-Algorithm
Raman	I-Algorithm
spectroscopy	I-Algorithm
(	O
micro-SORS	O
)	O
combines	O
SORS	O
with	O
microscopy	O
.	O
</s>
