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Optical Engineering • Open Access

Multiband imaging at the diffraction limit using Fresnel x-ray telescopes

Paper Abstract

We present a diffractive-refractive x-ray telescope for simultaneous imaging in multiple energy bands. Based on segmented achromatic lenses, the system yields an angular resolution around 1 mas between 5 and 10 keV for a focal distance of a few -------------------------------------------------------------------------------- . The total sensitivity, measured via the bandwidth-integrated effective area, reaches at least -------------------------------------------------------------------------------- . Our arrangement exploits Fresnel lenses used in higher phase shift orders for orderly protection from scattered radiation as well as reduced refractive profiles for an enhanced throughput. The telescope, which has its focal plane detector on a separated spacecraft, may be reoriented to new astrophysical targets on short timescales. Scientific applications are briefly discussed for active galactic nuclei.

Paper Details

Date Published: 28 September 2012
PDF: 23 pages
Opt. Eng. 51(9) 096501 doi: 10.1117/1.OE.51.9.096501
Published in: Optical Engineering Volume 51, Issue 9
Show Author Affiliations
Christoph Braig, Friedrich-Schiller-Univ. Jena (Germany)
Peter Predehl, Max-Planck-Institut für Extraterrestrische Physik (Germany)

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