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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
18.2.
Telescope Arrays; Interferometers 451
Computing the rms wavefront error according to Eq. (10.3.8) gives
co
=A. For an
otherwise perfect mirror, the Strehl ratio S = I
k^co^.
As an example, if
S = 0.9 at
A
= 500
nm,
then A = 25 nm,
co
= 0.05 waves, and the peak-to-
valley ampHtude is 50 nm.
Thus the effect of the print-through pattern is to remove light from the core of
the PSF and transfer it outward in the PSF. Unlike the radial scattering from
random errors, the regular pattern of the undulations causes the light to appear in
subsidiary peaks around the otherwise radially symmetric PSF. These side peaks
are located at the secondar
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Publisher Resources

ISBN: 9780126298109