OPTICALLY VARIABLE DIFFRACTION STRUCTURE, AND METHOD FOR THE PRODUCTION THEREOF

摘要

The optically variable diffraction structure (40) contains overt and hidden image information. The diffraction structure has first image elements representing the overt image information and second grid structure elements (46) that generate the hidden image information. The second grid structure elements are arranged in adjacent surface areas of the first image elements that are of lower importance for the representation of the overt image information : Independent claims are also included for the following: (A) a method of producing an inventive optically variable diffraction structure; (B) a security element with an inventive optically variable diffraction structure; (C) a security document with an inventive optically variable diffraction structure; (D) a data medium with an inventive optically variable diffraction structure; (E) a method of checking the authenticity of an inventive security element.