MICRO-OPTICAL SECURITY DEVICE FOR SURFACE APPLICATION FOR PROTECTION AGAINST FORGERY Russian patent published in 2023 - IPC B42D25/29 B42D25/40 B42D25/45 B42D25/324 

FIELD: protective devices.

SUBSTANCE: group of inventions relates to a protective device and a method for its manufacture. In this case, the protective device contains a protective film (130) containing (i) an array of image elements (103); (ii) an array of focusing elements (106) and (iii) at least one anti-tack agent (115); wherein the array of focusing elements and the array of image elements are located relative to each other so that the artificially created image is projected by the protective film when viewing at least part of the array of image elements through at least part of the array of focusing elements; and moreover, the anti-tack agent is integrated into the focusing element array, and wherein the connection of the anti-tack agent to the focusing element array must be performed without interrupting the optical function of the focusing element array, thereby maintaining the optical integrity necessary for projecting an artificially created image, and while the anti-tack agent is a surfactant containing several alternating groups of esters and hydrocarbons.

EFFECT: effective performance.

30 cl, 13 dwg