Physics – Optics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986msfc.rept.....z&link_type=abstract
Final Report National Aeronautics and Space Administration. Marshall Space Flight Center, Huntsville, AL.
Physics
Optics
Equipment Specifications, Focusing, Performance Tests, Ring Structures, X Ray Telescopes, Geometrical Optics, Mirrors, X Ray Astrophysics Facility
Scientific paper
A test method particularly suited for X-ray telescopes was evaluated experimentally. The method makes use of a focused ring formed by an annular aperture when using a point source at a finite distance. This would supplement measurements of the best focus image which is blurred when the test source is at a finite distance. The telescope used was the Technology Mirror Assembly of the Advanced X-ray Astrophysis Facility (AXAF) program. Observed ring image defects could be related to the azimuthal location of their sources in the telescope even though in this case the predicted sharp ring was obscured by scattering, finite source size, and residual figure errors.
Korsch Dietrich
Zissa David E.
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