Abstract

Recent advances in the studies of x-ray diffraction phenomena and the technology of structures with elements up to hundreds of angstroms in size open up possibilities for fabrication of effective x-ray focusing elements with three-dimensional Fresnel zone structures, namely, Bragg-Fresnel lenses (BFL) [1-4]. BFL differs favourably from the Fresnel zone plate by the absence of chromatic aberrations which is due to the high spectral selectivity of Bragg reflection, Δλ/λ~10^–4 ÷10^–5. This enables observation of focusing [5] and image transmission [6-7] in the white spectrum of synchrotron radiation (SR).

© 1988 Optical Society of America