Optical security component and optical security product utilizing same

Abstract

Disclosed are an optical anti-counterfeiting element and an optical anti-counterfeiting product utilizing the same, the optical anti-counterfeiting element comprising: a substrate ( 12 ) including a first surface and a second surface opposite to each other; micro-sampling tools ( 11 ) on the first surface; and one or more micro graphic and text units formed on the second surface, wherein the micro graphic and text unit includes micro graphic and text strokes, the micro graphic and text strokes are arranged in a non-periodic and non-fixed-geometry manner, and when the second surface is observed through the micro-sampling tools, a stereoscopic animated anti-counterfeiting feature can be seen.

1 . An optical anti-counterfeiting element, comprising:
 a substrate comprising a first surface and a second surface opposite to each other;   micro-sampling tools formed on the first surface; and
 one or more micro graphic and text units formed on the second surface, wherein the micro graphic and text unit includes micro graphic and text strokes arranged in a non-periodic and non-fixed-geometry manner, and when the second surface is observed through the micro-sampling tools, a stereoscopic animated anti-counterfeiting feature can be seen. 
   
     
     
         2 . The optical anti-counterfeiting element according to  claim 1 , wherein the optical anti-counterfeiting element further comprises:
 a first coating that is conformally covered on the micro graphic and text strokes; and/or   a second coating that is conformally covered on areas among the micro graphic and text strokes of the second surface.   
     
     
         3 . The optical anti-counterfeiting element according to  claim 1 , wherein the micro-sampling tools are a microlens array. 
     
     
         4 . The optical anti-counterfeiting element according to  claim 3 , wherein the microlens array is any one or any combination of the following: a cylindrical lens array, a spherical lens array, and a Fresnel lens array. 
     
     
         5 . The optical anti-counterfeiting element according to  claim 2 , wherein the micro graphic and text strokes are formed by a first micro-relief structure on which the first coating is conformally covered; and the area among the micro graphic and text strokes is a flat area on which the second coating is conformally covered. 
     
     
         6 . The optical anti-counterfeiting element according to  claim 2 , wherein the micro graphic and text strokes are formed by a first micro-relief structure on which the first coating is conformally covered; and the area among the micro graphic and text strokes is formed by a second micro-relief structure on which the second coating is conformally covered. 
     
     
         7 . The optical anti-counterfeiting element according to  claim 5 , wherein the first micro-relief structure is any one or any combination of the following: a diffraction grating having a period from 0.8 μm to 3 μm, a blazed grating having a period from 3 μm to 30 μm, a random scattering structure, and a sub-wavelength grating having a period from 0.1 μm to 0.8 μm. 
     
     
         8 . The optical anti-counterfeiting element according to  claim 6 , wherein the second micro-relief structure is a random scattering structure. 
     
     
         9 . The optical anti-counterfeiting element according to  claim 1 , wherein the optical anti-counterfeiting element further comprises:
 a first coating that is conformally covered on the micro graphic and text strokes, and the micro graphic and text strokes are flat or formed by a microstructure having an depth-to-width ratio ranging from 0 to 0.3; and   areas among the micro graphic and text strokes is not covered by a coating, and the micro graphic and text strokes are convex relative to the areas among the micro graphic and text strokes.   
     
     
         10 . The optical anti-counterfeiting element according to  claim 9 , wherein the first coating and/or the second coating is any one or any combination of the following: a single layer metal coating; a multilayer metal coating; a coating formed by an absorbing layer, a low refractive index medium layer and a reflective layer; a high refractive index medium coating; a multi-medium-layer coating formed by sequentially stacking a first high refractive index medium layer, a low refractive index medium layer, and a second high refraction layer; and a coating formed by sequentially stacking an absorbing layer, a high refractive index medium layer, and a reflective layer. 
     
     
         11 . The optical anti-counterfeiting element according to  claim 9 , wherein the optical anti-counterfeiting element further comprises a color layer at least partially covered on the surface of the first coating and/or the second coating. 
     
     
         12 . The optical anti-counterfeiting element according to  claim 11 , wherein the color layer has one color or a combination of a plurality of colors, and preferably the color layer is a white cover layer. 
     
     
         13 . The optical anti-counterfeiting element according to  claim 1 , wherein the micro graphic and text strokes of the micro graphic and text unit are arranged only in a first direction of the micro graphic and text unit in a non-periodic and non-fixed-geometry manner. 
     
     
         14 . The optical anti-counterfeiting element according to  claim 13 , wherein the sampling tools are a micro-cylindrical lens array. 
     
     
         15 . The optical anti-counterfeiting element according to  claim 14 , wherein the axial directions of micro-cylindrical lenses in the micro-cylindrical lens array are perpendicular to the first direction. 
     
     
         16 . The optical anti-counterfeiting element according to  claim 1 , wherein the substrate is a colored or colorless film that is transparent to visible light and is composed of one of the following materials:
 polyglycol terephthalate, polyvinyl chloride, polyethylene, polycarbonate, polypropylene, metal, glass, and paper.   
     
     
         17 . An optical anti-counterfeiting product, comprising the optical anti-counterfeiting element according to  claim 1 .