Ridged mirror
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"Fresnel mirror" redirects here. For the optical mirror technology which is analogous to a Fresnel lens, see Fresnel reflector.
In atomic physics, a ridged mirror (or ridged atomic mirror, or Fresnel diffraction mirror) is a kind of atomic mirror, designed for the specular reflection of neutral particles (atoms) coming at a grazing incidence angle. In order to reduce the mean attraction of particles to the surface and increase the reflectivity, this surface has narrow ridges. [1]