Patent ID: 11982788

Abstract:
A method for forming in particular reflection-reducing nanostructures (5) on a preferably polished surface (3) of a crystalline, in particular ionic, substrate (1) for transmission of radiation in the FUV/VUV wavelength range. The method includes: providing a surface (3, 7), which surface is not oriented along a lattice plane having a minimum surface energy, on the substrate (1) or on a layer (6) applied to the substrate (1) by a coating method, in particular vacuum vapor deposition, and introducing an energy input (E) into the surface (7) for rearranging the surface (7) to form the nanostructures (5), wherein the energy input (E) is generated by irradiating the surface (7) with electromagnetic radiation (4). Also, an optical element for transmission of radiation in the FUV/VUV wavelength range.