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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
13.6.
Fourier Transform Spectrometer 347
For the Fabry-Perot we assume
01
= 4E5, a resolving power appropriate for
the observation of narrow spectral lines, for example. With this ^ we find
Sp =
15
arc-min, which projects to about 23 arc-sec on the sky. Light loss at the
entrance aperture is not a problem with this telescope- spectrometer combination
and the system is far
fi-om
any reasonable seeing limit. It is important to note that
for 1 = 500 nm and N = 40 the fi-ee spectral range of the Fabry-Perot for this
resolving power is only 0.05 nm, compared to 5 or lOnm for an echelle in this
same wavelength range.
These examples illustrate th
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Publisher Resources

ISBN: 9780126298109