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27 September 2008 Achromatic x-ray focusing using diffractive and refractive elements
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We develop a new type of X-ray lens system which is achromatic in a limited energy range. For such achromats we combine different types of refractive and diffractive elements. For example, Fresnel zone plates and planar parabolic concave SU-8 lenses are combined with lenses with a biconvex parabolic shape and with Fresnel lenses, respectively. We present numerical results from a theoretical study of such optical systems. We determine the focal spot size for an energy range of about E ± ΔE with ΔE/E ≈ 17%. Amongst other results we find that, compared with conventional lens systems, the spot size can be reduced by several tens of percent by using such achromatic lens systems.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marion Umbach, Vladimir Nazmov, Markus Simon, Arndt Last, and Volker Saile "Achromatic x-ray focusing using diffractive and refractive elements", Proc. SPIE 7100, Optical Design and Engineering III, 71001U (27 September 2008);


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