
49-11Polarization Measurement
49.3.8 Coordinate Transformation
In polarimetric measurements, polarizers and retarders are frequently rotated to desired positions. When
a co
mponent
is ro
tated,
th
e
in
cident
e
ld
is no
t
ch
anged,
bu
t
th
e
re
presentations
of th
is
e
ld
in th
e
pr
inci-
pal
an
d
la
boratory
co
ordinate
sy
stems
ar
e
di
erent
. Tr
ansformations
of th
e
el
ectric
e
lds,
St
okes
vec
tors,
Jo
nes
an
d
Mü
eller
ma
trices
be
tween
th
ese
tw
o
co
ordinate
sy
stems
or fr
ames
ar
e
ba
sic
ex
ercises
in po
larim-
etry
. Le
t
th
e
la
boratory
fr
ame
ax
es
be x- an
d
y-a
xes
an
d
th
e
pr
incipal
fr
ame
ax
es
be x′- an
d
y′-a
xes
an
d
th
e
principal frame is rotated to an angle α with respect ...