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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
66
4.
Introduction to Aberrations
Fig. 4.11. Small section of corrector plate near edge, in cross section. Net ray deviation is
(n - 1)7.
increases as r^ and is a maximum at the edge; thus the marginal rays are deviated
by the largest amount.
If the corrector had a constant index of refraction it would affect rays of any
wavelength in the same way but, of course, this is not the case. Because n is not
constant the deviation is also a function of wavelength. Denoting the deviation by
6, a simple differentiation gives
dd/dX
ydn/dX.
(4.5.7)
Thus rays of different wavelength are directed in slightly different directions with
the effect larges ...
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Publisher Resources

ISBN: 9780126298109