Singlet
n
O
n
L
n
I
n
O
n
L
n
I
R
1
(
mm
)
R
2
(
mm
)
f
(
mm
)
Thickness
(
mm
)
R
2
=
-
R
1
Doublet
n
O
n
1
n
2
n
I
n
1
n
2
V
1
V
2
R
1
(
mm
)
R
2
(
mm
)
R
3
(
mm
)
R
2
=
-
R
1
d
1
(
mm
)
d
2
(
mm
)
f
1
(
mm
)
f
2
(
mm
)