JP2016530118A5 - - Google Patents

Claims (15)

At least one non-opaque microregion (30) having a cross-sectional area of 1000000 μm ² or less;
At least one diffractive optical element (40) of digital type at least partially superimposed on the non-opaque microregion (30), the imaging being located at a distance from the diffractive optical element (40) Said at least one diffractive optical element (40) generating at least one interference pattern (66) in a plane (62).   The structure of claim 1, wherein the non-opaque microregions (30) are defined by the absence of material within the substantially opaque layer of material (18; 20). The non-opaque micro-region (30) has a cross-sectional area of 200000Myuemu ² below, according to claim 1 or structures described in 2. The interference pattern (66) is at least partially, or desirably entirely, the security structure (2) or an article incorporating the security structure (2) in the form of a pattern generated by microperforations (19). (10) found on, one defines the non-opaque micro region (30), the structure according to any one of claims 1 to 3, of the microperforations (19). Wherein and a diffractive optical element (40) and said arranged protected adhesive structure between the sub-elements carrying the non-opaque micro regions (30) (45), any one of claims 1-4 The structure described in 6. The structure of claim 5 , wherein the protective adhesive structure (45) fills at least one microperforation at least partially or desirably completely. An adhesive structure (46) associated with a protective structure (47), the adhesive structure disposed between the diffractive optical element (40) and the sub-element carrying the non-opaque microregion (30) The structure according to any one of claims 1 to 4 , comprising (46). The structure of claim 7 , wherein the adhesive structure (46) is disposed between a sub-element carrying the non-opaque microregion (30) and the protective structure (47). The protective structure (47) is formed by overlaying a layer (47a) of HRI material and a layer (47b) containing a binder, the layer (47b) containing a binder being the layer of HRI material. The structure according to claim 7 or 8 , which is disposed on (47a). The adhesive structure (46) comprises a diffractive optical element (40) of a second subelement carrying the non-opaque microregion (30) and a first subelement carrying the diffractive optical element (40). The structure according to any one of claims 7 to 9 , wherein the structure is disposed between the side having no surface. The adhesive structure, at least one microporation meets at least in part, the structure according to any one of claims 7-10. A plurality of the diffractive optical element (40), and a plurality of non-opaque micro-region on at least part of at least one respective diffractive optical element (40) (30), one of the claims 1 to 11 Or the structure according to one item. Structure according to any one of the comprising at least one optical filter to have been at least partially superimposed non opaque micro areas (30) (80), according to claim 1 to 12. Secure article has security structure (2) according to any one of claims 1. 13 (10). An authentication method for security according to any one of claims 1 to 13 the following steps:
Illuminating the diffractive optical element with a light source (60);
Verifying the presence of an interference pattern (66) in an imaging plane (62) located at a distance from the diffractive optical element (40), in particular through the non-opaque microregions.