FIELD: physics.
SUBSTANCE: protective element has at least one section on which there is a diffraction structure which, under defined viewing conditions, reconstructs a diffraction-optical image, and on which there is are subsections which do not take part in reconstruction of the diffraction-optical image and display visually distinguished information. The subsections and the diffraction structure surrounding them under conditions for viewing the protective element, where the diffraction structure does not reconstruct the diffraction-optical image, have identical or at least very similar reflection properties, which makes the information displayed by the subsections primarily visible only in the said defined conditions for viewing the diffraction-optical image.
EFFECT: protective element has high degree of protection from counterfeiting and has defined readable information.
57 cl, 24 dwg, 17 ex
