Fresnel lens arrays for x-ray imaging spectroscopy

Christoph Braig; Peter Predehl

doi:10.1117/12.856457

29 July 2010 Fresnel lens arrays for x-ray imaging spectroscopy

Christoph Braig, Peter Predehl

Proceedings Volume 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray; 77322N (2010) https://doi.org/10.1117/12.856457
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

Arrays of achromatic Fresnel lenses are investigated for future high-resolution X-ray imaging missions. Unlike single-focus instruments, parallel arrangements of numerous tiny telescopes provide an easy and natural approach to spectroscopic observations in several energy bands, at an unprecedented short focal length of few 10³ m. We suggest an optimized design with an angular resolution around 1 mas between 5 and 10 keV and analyze its optical capabilities as well as issues like the background problem which affects the achievable signal-to-noise ratio. An astronomical simulation is performed on the sun-like star Capella.

Citation Download Citation

Christoph Braig and Peter Predehl "Fresnel lens arrays for x-ray imaging spectroscopy", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77322N (29 July 2010); https://doi.org/10.1117/12.856457

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