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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
374
15.
Plane Grating Spectrometers
Fig. 15.3. Geometry for finding orientation and curvature of focal surface for Czemy-Tumer
spectrograph.
can be used to find the image surface curvature. Substituting Bi in
K:^
in Table 5.7,
and noting that
Q'
= i/^, we find
K. =
R.
^0
RJ
(15.1.7)
where W is the distance OG in Fig. 15.3. The center of curvature of the image
surface is on the line (7C, and a flat image surface is perpendicular to this line.
Setting
Kf
= 0 gives the condition for a flat image surface as
W/R2 =
1
=b
\/y/3,
with the minus sign a more convenient choice. With this
value for W/R2, the coma measures for the preceding example ar
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Publisher Resources

ISBN: 9780126298109