FIELD: visually identified elements for securities. SUBSTANCE: device consists of surface sections containing one or several structures with diffractional-optical action, for creation of a definite optical information in definite directions of observation on one or several surface sections provision is made for zones with an identical structure, except for the "optical depth" structure parameter, the structure optical depth is constant over the entire length of one zone, however it differs from the optical length of the structure of another zone. EFFECT: complicated forgery, in particular, copying of securities. 7 cl, 3 dwg
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