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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
15.6.
Nonobjective Slitless Spectrometers
401
D(m)
Fig. 15.17. Plate factor P at which spectral coma equals seeing blur of
1
arc-sec for nonobjective
transmission grating. See Eq. (15.6.14).
fewer grooves per millimeter. Alternatively, for a given grating at different
distances from the focal surface, the size of TAS is directly proportional to s.
As an example, take a first-order grating with 150 grooves/mm in an//8
beam. This grating has a plate factor of lOOnm/mm when s is 67 mm. At
wavelengths of 400 and 600
nm,
respectively, the astigmatic image lengths are 30
and 68 jim when a = 0. If l^ is 500 nm, hence a = —2.15°, the image lengths ...
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Publisher Resources

ISBN: 9780126298109