Physics – Optics
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1160..409h&link_type=abstract
IN: X-ray/EUV optics for astronomy and microscopy; Proceedings of the Meeting, San Diego, CA, Aug. 7-11, 1989 (A90-46006 21-74).
Physics
Optics
Optical Properties, Prediction Analysis Techniques, Systems Simulation, X Ray Telescopes, Geometrical Optics, Nasa Space Programs, Performance Prediction, Power Spectra, X Ray Imagery
Scientific paper
Accurate prediction of focal plane performance is difficult at X-ray wavelengths for grazing incidence optical systems with very highly obscured apertures like the SXT mirror assembly. This paper describes a modeling approach that was used to set telescope surface specifications in order to achieve a desired encircled energy and spot size at an operating wavelength of 13.3 A. Assumptions that were made before fabrication will be presented first. Next, performance predicted by replacing many of these assumptions with actual parameters obtained from measurement of the as-built surfaces was compared to test data taken in the NASA/Marshall X-ray testing facility. Finally, an estimate was made of the rms spot size, from knife edge data. This is discussed in terms of its usefulness as a descriptor of telescope performance.
Hull-Allen Gregory C.
Jordan David C.
Kumler J. J.
Kusha Ray G.
Slomba Albert F.
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