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Adaptive Optics for Biological Imaging
book

Adaptive Optics for Biological Imaging

by Joel A Kubby
April 2013
Intermediate to advanced content levelIntermediate to advanced
388 pages
16h 6m
English
CRC Press
Content preview from Adaptive Optics for Biological Imaging
8 Principles
where the second form is composed of two factors, the sinusoidal wave at the mean wavenumber, vary-
ing rapidly in space at k
0
, and an envelope function, varying slowly in space at Δk. e rapid sinusoids
travel at the phase velocity
v
k
c
n
p
= =
ω
0
0
whereas the envelope travels at the group velocity
v
k
ck n
k
c
n
ck
n
n
k
c
n
n n
k k
g
( )
= = =
=
ω /
/
/
2
1

= +
c
n
n n
1
/
/λ λ
Referring to Figure 1.2 for the case of silica int glass, we see that
λ
λ
λ
=
= =
=
400 500
100
450
0 222
1 63 1 66
nm,
,
.
. .n
n
n
==
=
0 03
1 645
0 207
.
.
.
and thus
v v
v
c
n
c
g p
p
=
= =
0 918
0 61
.
.
So in this case of normal dispersion, the group velocity of the packet is slower ...
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Publisher Resources

ISBN: 9781439850190