2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170309We present a proposal for a X-ray optical element suitable for X-ray microscopy and other X-ray-based display systems. Its principle is based on the Fresnel lenses condition and the Bragg condition for X-ray scattering on a slice of monocrystal. These conditions are fulfilled simultaneously due to a properly machined shape of the monocrystal with a stress at its ends.8 pages, 4 figuresOpticstext