Physics – Optics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apopt..23.3732h&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 23, Nov. 1, 1984, p. 3732-3735.
Physics
Optics
8
Extreme Ultraviolet Radiation, Grazing Incidence Telescopes, Spectroscopic Telescopes, Stellar Spectrophotometry, Ultraviolet Telescopes, X Ray Telescopes, Gratings (Spectra), Paraboloid Mirrors, Ray Tracing, Reflecting Telescopes, Ultraviolet Spectroscopy, X Ray Spectroscopy
Scientific paper
A new class of grazing incidence telescopes is identified, and its advantages for stellar spectroscopy are discussed. In particular, three types of telescope geometry consisting of a primary and a secondary, both at grazing incidence, are proposed. Type I delivers a converging beam having a real focus; type II delivers a diverging beam from a virtual focus, and type III delivers a collimated beam concentrated relative to the primary aperture. The three telescope types are shown to possess unique properties which improve the efficiency and shorten the length of soft X-ray/EUV spectrographs.
Bowyer Stuart
Hettrick Michael C.
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