4 November 2004 Energy-dependent focusing properties of a kinoform Fresnel lens
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Abstract
One application of Kinoform Fresnel Lenses is to generate small focal spots of hard X-ray photons with high gain for micro-diffraction experiments. A Kinoform lens can be obtained from a refractive lens by deleting material such that at the design photon energy, the deleted regions correspond to with modulo 2π phase-shifts in the phase front. At photon energies different from the design photon energy, the phase jumps are no longer 2π, and the diffractive properties of the kinoform become more significant. We present measurements and calculations of spot size versus photon energy.
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Kenneth Evans-Lutterodt, Kenneth Evans-Lutterodt, James M. Ablett, James M. Ablett, Aaron Stein, Aaron Stein, Donald M. Tennant, Donald M. Tennant, Fred Klemens, Fred Klemens, Ashley Taylor, Ashley Taylor, } "Energy-dependent focusing properties of a kinoform Fresnel lens", Proc. SPIE 5539, Design and Microfabrication of Novel X-Ray Optics II, (4 November 2004); doi: 10.1117/12.560296; https://doi.org/10.1117/12.560296
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