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Astronomical Optics, 2nd Edition
book

Astronomical Optics, 2nd Edition

by Daniel J. Schroeder
September 1999
Intermediate to advanced content levelIntermediate to advanced
478 pages
21h 54m
English
Academic Press
Content preview from Astronomical Optics, 2nd Edition
10.2.
Perfect Image: Circular Aperture
251
O
second dark ring
first dark ring
half-peak intensity
0.1 0.2 0.3
0.4
Fig.
10.7.
Dimensionless radii
at
first two dark rings
and
one-half of peak intensity
as a
function
of obscuration ratio. Linear radius
=
wXF;
angular radius
=
wX/D.
10.2.b.
AVERAGE PSF
IN
AIRY WINGS
The description
of
the
PSF in the
wings
of
the Airy pattern beyond
a few
bright rings
is
derived by using the following asymptotic relation
for
the function
J.:
'M-i^TH^-T-d-
O"-^-'"
This approximation
is
good
to 1% or
better
for P > 15.
Choosing
n = I and
j8
= i; or
8v,
as
appropriate,
Eq.
(10.2.8) becomes
i(P)
= -^ - cos i;
—7-
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Publisher Resources

ISBN: 9780126298109