Protection element with diffraction structures

FIELD: engineering of protection elements.

SUBSTANCE: protection element 2 of plastic laminate 1 with surface ornament 12 mosaic-composed of surface elements 13,14,15, while plastic laminate 1 has shaped layer 5 positioned between surface 4 and protective 6 layers. Light 11 falling on boundary surface 8 between shaped 5 and protective 6 layers, is reflected, while at boundary surface 8 structures 9 are formed of optical effect of surface elements 13,14,15. in surface ornament 12 at least one pair 14,15 of surfaces is positioned, formed by first 14 and second 15 surface elements. Each surface element 14,15 has diffraction structure {B(x,y,T)}, produced by superposition of grid structure {G(x,y)} onto profiled structure {R(x,y)}. In first surface el 14 vector 16 of grid structure {G(x,y)} and vector 17 of profiled structure {R(x,y)} are practically parallel to each other, and inside second surface element 15 vector 16 of similar grid structure {G(x,y)} and vector 17 of similar profiled structure {R(x,y)} enclose practically a right angle, vectors 16 of grid structures {G(x,y)} in both surface elements 14,15 are practically parallel. Spatial frequency fR of both relief structures {R(x,y)} is more than 2500 lines in one millimeter, while spatial frequency fR of profile is at least ten times greater than spatial frequency fG of both grid structures {G(x,y)}.

EFFECT: protection element is hard to copy and has bright surface drawing altering on rotation or inclination, authenticity of element is easily checked by simple means.

25 cl, 10 dwg, 2 ex

 

Description

The invention relates to a protection element with a diffractive structures under the restrictive part of claim 1 of the formula.

Such security elements consist of thin multilayered composition of the varnish and/or plastic and multilayer compositions performed, at least, a relief structure from a group of diffractive structures, light-diffusing structures and flat mirror surfaces. Cut from the multilayered composition protection elements paste on items to authenticate the last.

The design of thin multilayer composition and applied materials are described, for example, in US 4856857. From DE 3308831 A1 is known a thin multi-layer composition on the subject with the help of base film.

Such security elements contain in most cases, the pattern of the mosaic is composed of, covered with a microscopically fine relief structures of the surface elements. When tilting or rotation of the security element of the specified pattern is modified. This protection element is known from EP 0105099 A1. In order for the pattern was clearly visible by an observer, and when tilting or rotation of the element protection were presented as noticeable changing play of colours, microscopically fine relief structure surface elements must reject incident on the element in the protection of light in the first is VA order diffraction. Microscopically fine relief structures that satisfy this condition, contain structural elements which, in principle, can be copied holographic means. Although the cost of making copies is large, however, there is a need to make tampered with or copied the patterns are easy to detect.

The basis of the invention lies in the task of creating a security feature that would be bright, changing in rotation or inclination of the surface pattern, it is difficult to be copied, the authenticity of which could be verified by simple means.

The above problem is solved according to the invention by the characteristics specified in the characterizing part of claim 1 of the formula.

Preferred embodiments of the invention are given in the dependent clauses.

Examples of execution of the invention shown in the drawing and described below in more detail.

In the drawing represent:

figure 1: protection element in cross section;

figure 2: protection element, top view;

figure 3: the first diffractive structure;

figure 4: the second diffractive structure;

figure 5: surface pattern in daylight;

6: lighting device;

7: surface pattern of the light polarized perpendicular to the plane of incidence;

Fig: surface pattern of the light polarized parallel to the plane of incidence;

Phi is .9: the third diffractive structure;

figure 10: fourth diffraction structure.

Figure 1 POS.1 marked multilayer composition (laminate), 2 - element protection, 3 - substrate; pos.4 - coating layer, pos.5 - molded layer, pos.6 - protective layer; pos.7 - adhesive layer, pos.8 - reflecting boundary layer, position 9 - structure of the optical action and pos.10 - transparent place in the reflective boundary layer 8. Multi-layer composition 1 consists of several layers, sequentially deposited on the film base (not shown) of plastic or lacquer layer and includes in sequence usually cover 4, molded 5, 6 protective and adhesive 7 layers. The film base may be formed in one form of execution by a top layer 4; in another form of the film-can serve as a basis for placing a thin multi-layer composition 1 on the substrate 3, and then remove with a layered composition 1, as described in the above publication DE 3308831 A1.

Shared touch surface is formed between 5 and 6 protective layers called forth the boundary surface 8. In the formed layer 5 of the molded optical structure 9 steps optically variable pattern. Since the protective layer 6 fills the cavity structures 9 optical steps, the boundary surface 8 has the shape of structures 9 optical action. To save the th high efficiency structures 9 optical action boundary surface 8 is formed by a metal coating, preferably of aluminum, silver, gold, copper, chromium, tantalum, etc. that separates the formed 5 and 6 protective layers and due to its conductivity causes a high reflectivity for visible light at the boundary surface 8. Multilayered composition 1 is made of plastic laminate in the form of long sheets of film with many located next to each other copies of the optically variable pattern. From a panel of film elements 2 protection, for example, cut through the adhesive layer 7 connected to the substrate 3. The substrate 3, in most cases in the form of a document, banknote, credit card, ID or other important or valuable object, provided with a protection element 2 to confirm the authenticity of this object.

At least top 4 and molded 5 layers are transparent to visible incident on the element 2 of the protection of the light 11. On the boundary surface 8 of the incident light 11 is reflected and specified in the deflected structure 9 of the optical steps. As patterns 9 optical actions serve as a diffraction grating, light-scattering relief structure or a flat mirror surface. In some forms of execution of the protection element 2 in the boundary surface 8 is made transparent the haunted places 10, in which a reflective metal coating is interrupted, so that lying under the protection element 2 on the substrate 3 signs were visible through the protection element 2. Needless to say, these examples 6 and protective adhesive 7 layers are transparent. For particularly thin executions of the multilayered composition 1 instead of the protective layer 6 applied adhesive layer 7, in particular, if the adhesive is a hot melt adhesive, which develops its adhesive ability only at a temperature of about 100°C. In the above-mentioned publication US 4856857 disclosed various forms of execution of the multilayered composition 1 and lists used for this material.

Figure 2 shows a fragment of the substrate 3, lying in the designated rectangular coordinates x, y plane. Element 2 protection, cut from plastic laminate and bonded to the substrate 3, contains visible through the cover 4 and the formed 5 layers (Fig 1) surface pattern 12. The surface pattern 12 a mosaic composed of surface elements 13, 14, 15. Surface elements 13, 14, 15 are covered with structures 9 optical action and reflect on the boundary surface 8 (Fig 1) formed between 5 and 6 protective layers falling through the layers 4, 5 light 11 (Fig 1). Formed in the other surface elements 13 structures 9 optical actions are Direcci the nnye lattice, light-scattering relief structure and/or flat mirror surfaces, which form an optically variable surface pattern 12, as described, for example, in EP 0105099 A1. In one form of the optically variable surface pattern 12, at least one transparent place borders, at least one of the surface elements 13, 14, 15.

At least two surface element 14, 15 form check the sign by which you can distinguish a copy of the element 2 of the protection from its original. Each of the two surface elements 14, 15 includes a diffracting visible incident light 11 structure 9 with optical current height h of the profile (figure 1), the relief function which is a superposition of low-frequency grating structure G(x, y) on the frequency of the relief structure R(x, y). Low-frequency grating structure G(x, y) has a known profile, such as sinusoidal, rectangular, symmetric or asymmetric sawtooth profile, etc. Frequency of the relief structure R(x, y) is the spatial frequency fRat least 2500 lines per millimeter. Low-frequency grating structure G(x, y) has, on the other hand, the spatial frequency fGfor example, less than 1000 lines per millimeter. This should draw attention to the fact that the spatial frequency fRrelief should be at least ten times higher than the spatial frequency fGlattice, in order to avoid undesirable modulation effects. Preferably, the spatial frequency fGthe grid has a value of 100 to 500 lines per millimeter.

The relief structure R(x, y) one is a diffraction grating, which is due to the high spatial frequency fRrelief dirigeret incident light 11 only in the zero order, and the shape of her profile itself is insignificant. Dragirovaniya light thrown back at the same angle as the angle formed by the incident light 11 and the normal to the surface of the protection element 2, i.e. such diffraction grating behaves as a mirror, with the only difference that depending on the optical current height hRprofile in the spectrum of the diffracted light are missing certain colors. Because of the high spatial frequency fRrelief the effectiveness of ETHOSEETMthe relief structure R(x, y) for TE - and TM-polarized light, as a rule, different. While the TE-polarized light with high efficiency ETHOSEdiffraction is reflected from the relief structure R(x, y) almost independently of the optical current height hRprofile, the effectiveness of ETMdiffraction for TM-polarized light decreases rapidly up to the first minimum, g is e, the impact of polarization of the relief structure R(x, y) on the incident light 11 is therefore the most powerful. If the direction of the unpolarized incident light 11, the normal to the surface and describe the relief structure R(x, y) the vector lies in the diffraction plane, the vector of the electric field polarized parallel to the plane of incidence of the light oscillating parallel to that of the diffraction plane. Polarized parallel to the plane of incidence of the light is absorbed so the relief structure R(x, y). On the contrary, the vector of the electric field polarized perpendicular to the plane of incidence of light varies perpendicular to the diffraction plane and parallel to the grooves of the relief the relief structure R(x, y). Polarized perpendicular to the plane of incidence of the light is reflected by the relief structure R(x, y). If the relief structure R(x, y) rotated in its plane by 90°and grooves of the relief the relief structure R(x, y) is oriented parallel to the diffraction plane, the polarized perpendicular to the plane of incidence of the light is absorbed, and polarized parallel to the plane of incidence is reflected. Light, dragirovaniya relief structure R(x, y) in the zero order, is therefore linearly polarized, i.e. the relief structure R(x, y) is valid for unpolarized incident light 11 as a polarizer, and for Positano incident light 11 as the analyzer.

pricheski the current height h Rprofile of the relief structure R(x, y) must be shifted in the range with high polarizing power. Optically active height hRprofile has therefore a value in the range of 150-220 nm; preferably optically effective height hRprofile choose, but in a narrower range 170-200 nm.

Optically active height hGprofile of the grating structure G(x, y) should be chosen more optical current height hRthe elevation profile. Optically active height hGprofile of the grating is preferably a value in the range 250-500 nm, and for optical current height hGprofile of the grating is chosen preferably is half the length of the Ο the wavelength of the incident light 11. This should draw attention to the fact that the length of the Ο waves in the molded layer 5 is reduced by a factor of n, where n is the refractive index of the material of the molded layer 5. The index of refraction n is set to, for example, 1,55. For the same reason, molded in the molded layer 5 geometric height of the profile should be chosen by a factor of n less than the above optical current height hGprofile. Low-frequency grating structure G(x, y) one dirigeret incident light 11, at least, depending on the spatial frequency fGlattice in the som is to diffraction orders.

Figure 3 shows a cutout of a multilayer composition 1 in the first surface element 14 (Fig. 2) formed 5 and 6 protective layers. Boundary surface 8 molded by the diffraction structure B(x, y). The diffraction structure B(x, y) is a function of the rectangular coordinates x, y, forming the base of the neckline of the multi-layer composition 1. Shown in figure 3 diffraction structure B(x, y) is the additive superposition of sinusoidal grating structure G(x) sine of the relief structure R(x), i.e. V(x) = G(x) + R(x). Vector 16 grating structure G(x) and the vector 17 relief structure R(x) is oriented essentially in parallel. This parallelism of vectors 16,17 is a sign of the diffraction structure B(x, y) in the first surface element 14 (figure 2).

Figure 4 shows a cutout of a multilayer composition 1 in the second surface element 15 (figure 2) with the boundary surface 8 formed between 5 and 6 protective layers. Vector 16 lattice vector 17 relief is oriented in the plane of coordinates x, y are mutually orthogonal. For example, a sinusoidal grating structure G(x) is only a function of the coordinates x, whereas sinusoidal relief structure R(y) depends only on the coordinates. Additive overlay grating structure G(x) on the relief structure R(y) gives-dependent obey the coordinates x, the diffraction structure B(x, y)and(x, y)=G(x)+R(u). For reasons of pure clarity, figure 4 boundary surface 8 with lying to each other by depressions of the relief structure R(y) is covered with dot rasters of different density. The sign of the diffraction structure B(x, y) in the second surface element 15 is formed of a right angle between the vector 16 lattices and vector 17 of relief.

Figure 5 shows a surface pattern 12, consisting only of the first 14 and second 15 surface elements. In a more General form of the diffraction structure B(x, y) depends on is related to the vector 16 lattice azimuthal angle Τ vector 17 of relief, i.e. In(x, y, Τ). In the first surface element 14 azimuthal angle lies in the range Τ=0-30°while the second surface element 15 azimuthal angle has a value in the range of 60-90°. The most pronounced are described below polarization parameters, when the azimuthal angle Τ has exactly the value of respectively 0 and 90°. In order to take this fact into account, the vectors of the lattice 16 and relief 17 in the first surface element 14 essentially parallel, i.e. they make the azimuthal angle Τ with a value of from about 30° to the preferred values 0about. Used azimuthal angle Τ in the second surface element 15 is essentially direct the angle i.e. it has a value of from about 60aboutto the preferred values 90°. Surface patterns 12 with diffraction structures In the(x, y, Τ) have the advantage that by using holographic tools of the diffraction structure B(x, y, Τ)based on the original element 2 protection (figure 1), may not be copied. Holographic copy contains structures that giragira incident light 11 as well as low-frequency grating structure G(x, y), but sleepilerious the impact of high-frequency embossed structures R(x, y) on dragirovaniya light is absent. Check polarizing ability allows therefore to distinguish the copy from the original.

In the first 14 and second 15 surface elements of the grating structure G(x, y) have the same parameters. Both the relief structure R(x, y) differ only in the azimuthal orientation of its vector 17 of relief. Both diffraction patterns In the(x, y, Τ=0°) and(x, y, Τ=90°) giragira incident light 11 (Fig. 1) and split dragirovaniya light in color in several diffraction orders. The action imposed on the grating structure G(x, y) relief structures R(x, y) is expressed in the corresponding polarizing ability of relief agencies R(x,y) the linear polarization of the diffracted light. In order observer were simultaneously visible to the first 14 and the second surface 15 items vector 16 of the grating in the first surface element 14 and the vector 16 of the grating in the second surface element 15 should be oriented essentially in parallel. If falling on the surface pattern 12 light 11 polarized nonlinear, as is the case under normal light or in daylight, both surface element 14, 15 are presented to the observer on both sides of the common path 18 are equally bright and in the same color, i.e. the contrast between the two surface elements 14, 15 is so small that the total circuit 18 indistinguishable.

Figure 6 depicts a lighting device for checking element 2 protection. The diffraction plane is figure 6 the drawing plane and contains the normal to the surface of the protection element 2 and the coordinate X. the Source 19 almost white light cast through the polarizing filter 20, a beam of linearly polarized light 21 parallel to the diffraction plane of the surface pattern 12 (figure 5) element 2 protection. Part polarized light 21 in the form of the reflected and/or thermalneutron in the zero order diffraction light is deflected in a predetermined law of reflection direction 22 of reflection. The other part, on the contrary, dirrahiuma in 23 positive and negative 24 orders of diffraction. Since the diffraction structure B(x, y, Τ=0°) and(x, y, Τ=90°) have different polarization pairs of the points that both surface element 14, 15 can be distinguished from each other in a linearly polarized light 21.

7 surface pattern 12 lit polarized perpendicular to the plane of incidence of light 21 (6). In the first surface element 14 is polarized perpendicular to the plane of incidence of the light 21 is reflected as a vector of 16 lattice (figure 3) and the vector of 17 elevation (figure 3) is oriented essentially parallel to the coordinate X. in Contrast, polarized perpendicular to the plane of incidence of the light 21 is absorbed in the second surface element 15, as a vector of 16 lattice is oriented parallel to the coordinate x, and the vector of 17 elevation (figure 5) forms with the vector 16 lattice, essentially a right angle. The second surface element 15 stands out, therefore, on a light ground surface element 14 in the form of a dark surface.

On Fig the same surface pattern 12 lit polarized parallel to the plane of incidence of light 21 (6), which is absorbed in the first surface element 14 and is reflected by the second surface element 15. The second surface element 15 stands out, therefore, on the dark surface of the first surface element 14 in the form of a light-colored surface.

Preferably both of the surface element 14, 15 are contiguous, so that the contrast was most marked.

Example 1

Gξsin(x) is a sine function with a period of 5000 nm and an optically active height hGprofile 450 nm. The relief structure R(x)=0,5ξhRξsin(x) is a sine function with a period of 333 nm and optical current height hRprofile of 185 nm. For polarized parallel to the plane of incidence of light 21, the diffraction efficiency of the diffraction structure b(x)=G(x)+R(x) in all orders 23, 24 diffraction (6) is very small, whereas for polarized perpendicular to the plane of incidence of the light 21 of the diffraction structure b(x) is the diffraction efficiency of the third order of diffraction of more than 10%, and in other orders of diffraction of more than 5%.

Example 2

The diffraction structure b(x) figure 9 is a multiplicative blending(x) = G(x)ξ{R(x)+C}. Grating structure G(x) is a rectangular function with functional values [0,hG], the period of 4000 nm and optical current height hGprofile 320 nm. The relief structure R(x)=0,5ξhRξsin(x) is a sine function with a period of 250 nm and an optically active height hRprofile 200 nm. C indicates a constant, and C=hG-hR. Vector 16 lattice and a vector of 17 elevation parallel to the x-axis coordinate. Boundary surface 8 between the layers 5, 6 are modulated on the elevated surfaces of the rectangular structure with a relief structures is th R(x), while the boundary surface 8 at the bottom of the grooves of rectangular patterns smooth. For polarized parallel to the plane of incidence of light 21, the diffraction efficiency of the diffraction structure b(x), except for the zero-order diffraction in the direction 22, all orders 23, 24 diffraction (6) is very small, whereas for polarized perpendicular to the plane of incidence of the light 21 of the diffraction structure b(x) has a high diffraction efficiency only in the +1st and-1st orders of diffraction.

Figure 10 multiplicative overlapping rectangular grating structure G(x) on the relief structure R(y) generates formed in the boundary surface 8 of the diffraction structure B(x, y). Lattice G(x) and embossed R(u) have the same parameters as described above, the diffraction structure b(x), with the exception vector 17 of relief, which indicates not in the direction of the coordinates x and in the direction of the coordinates. Except for the zero-order diffraction in the direction 22 (6), the diffraction structure B(x, y)=G(x)ξ{R(u)+C} has polarized perpendicular to the plane of incidence of light 21 is very low diffraction efficiency in all orders 23, 24 diffraction (Fig.6), while polarized parallel to the plane of incidence of light 21 (6) of the diffraction structure b(x) has a high diffraction efficiency only in the+1st and-1st orders of diffraction.

If (5) of the diffraction structure b(x) in the first surface element 14, and the diffraction structure B(x, y) in the second surface element 15 are arranged as described above, the surface pattern 12 has the behavior described using 5, 7, 8.

After turning the surface pattern 12 (figure 5) in its plane while maintaining the directions of illumination and observation, dragirovaniya in rules 23, 24 of the diffraction light does not fall within the field of view of the observer, while the vector 16 of the grating is directed from the diffraction plane. By tilting the protection element 2 (6) so that the observer perceived the light of the directions of 22 reflection, he will see dragirovaniya in the zero diffraction order and the colored light and notice that the surface brightness of both surface elements 14, 15 (figure 5) does not depend on the angle of rotation, provided that the coverage of the surface pattern 12 is unpolarized light. If the light is linearly polarized light 21 (6), then the brightness of the surfaces of both surface elements 14, 15 are changed after each rotate 90°.

Returning to figure 2: preferably in the surface pattern 12 of the first surface element 14 with the diffraction structure B(x, y, Τ=0°), and the second surface element 15 with the diffraction structure B(x, y, Τ=90°) periodically change across its the second longitudinal length. This creates a linearly polarized light 21 (6) conspicuous, confirming the authenticity of the pattern on the inside surface of the pattern 12. In the drawing figure 2 correspond to, for example, in the first surface element 14 of the diffraction structure B(x, y, Τ=0°), the second surface element 15 - diffraction structure B(x, y, Τ=90°), in the area of 25 - diffraction structure B(x, y, Τ=0°), in the outer zone 26 - diffraction structure B(x, y, Τ=90°) etc.

To the surface of the surface elements 14, 15 and zones 25, 26 were clearly visible to the naked eye, elongated surface elements 13, 14, 15 and respectively 25, 26 are transverse dimensions of at least 0,5 mm

For the sake of simplicity still surface patterns 12 are dealt with, at least one pair [14, 15] surfaces of the surface elements 14, 15, and vectors 16 lattice structures G(x, y) (figure 3) in both surface elements 14, 15 are oriented in one direction, for example along the coordinate X. In another form of execution of the protection element 2 in the surface pattern 12 may be there are many pairs [14, 15] surfaces so that the vectors of 16 grids of each pair [14, 15] surfaces differ from vectors 16 the other couples lattice [14, 15] surfaces angle in azimuth.

For example, in sector 27 of the circular ring surface is the first pattern 12 used pair [14, 15] surfaces, both vector 16 lattice is oriented radially, i.e. slightly divergent. No significant deterioration of the observed effect and visibility of the diffraction structures In the(x, y, Τ) both vector 16 lattice of the same pair [14, 15] surfaces can conclude angle in azimuth in the range 0-10°. To achieve the above-described visible effect is sufficient, if both vector 16 of the grating pair [14, 15] surfaces oriented only, mainly, in parallel, for example in the range of 0-10°. In one preferred form of execution of both vector 16 of the grating pair [14, 15] surfaces parallel. For example, in another form of execution on a circular ring 28 adjacent to each other are the same sectors 27 and the first surface element 14, a second surface element 15, followed, in turn, the first surface element 14, etc. with radially oriented vectors 16 lattice. This periodic arrangement has the advantage that, despite the position of the element 2 protection when rotating in its plane, is always at least one first surface element 14 and the second surface element 15 is oriented so that they are visible to the observer and the light polarized light 21 have the above effect. The first 14 and second 15 surface elements autosets is either one of the pairs [14, 15] surfaces, or to two adjacent circular ring 28 pairs [14, 15] surfaces.

1. Item (2) protection of plastic laminate (1) with a mosaic composed of surface elements (13; 14; 15) surface pattern (12), and plastic laminate (1) is located between the cover (4) and protective (6) layers of the formed layer (5) and reflecting the incident through the cover (4) and molded (5) layers of light (11) of the boundary surface (8) formed between (5) and protective (6) layers, and the boundary surface (8) formed in the layer (5) the molded structure (9) optical action surface elements (13; 14; 15), characterized in that the surface pattern (12) is at least one pair (14, 15) surfaces formed by the first (14) and second (15) surface elements, each surface element (14; 15) includes a diffraction structure {(x, y, T)}, obtained by superposition of lattice structure {G(x, y)} on the relief structure {R(x, y,)}, in the first surface element (14) the vector (16) lattice structure {G(x, y)} and the vector (17) embossed patterns {R(x, y)}, essentially parallel, and the second surface element (15) the vector (16) the same lattice structure {G(x, y)} and the vector (17) the same relief patterns {R(x, y)} conclude, essentially at a right angle to the vectors (16) lattice structures {G(x, y)} in both surface element is (14; 15), essentially parallel, spatial frequency (fRboth relief structures {R(x, y)} is more than 2500 lines per millimeter, while the spatial frequency (fRrelief, at least ten times higher spatial frequency (fGboth lattice structures {G(x, y)}.

2. The element according to claim 1, characterized in that the spatial frequency (fG) lattice structure {G(x, y)} has a value in the range of 100-500 lines per millimeter.

3. The element according to claim 1 or 2, characterized in that the reflecting boundary surface (8) formed by a metal layer with high electrical conductivity.

4. The element according to claim 1 or 2, characterized in that the relief structure {R(x, y)} is the sinus function.

5. The element according to claim 3, characterized in that the relief structure {R(x, y)} is the sinus function.

6. The element according to claim 1 or 2, characterized in that the lattice structure {G(x, y)} is the sinus function.

7. The element according to claim 3, characterized in that the lattice structure {G(x, y)} is the sinus function.

8. The element according to claim 4, characterized in that the lattice structure {G(x, y)} is the sinus function.

9. The element according to claim 5, characterized in that the lattice structure {G(x, y)} is the sinus function.

10. The element according to claim 6, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range 350-550 n is, when this optical height (hG) profile of lattice structure {G(x, y)}at least twice as much optical height (hR) profile relief patterns {R(x, y)}.

11. The element according to claim 7, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 350-550 nm, with optical height (hG) profile of lattice structure {G(x, y)}at least twice as much optical height (hp) of profile relief patterns {R(x, y)}.

12. The element according to claim 8, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 350-550 nm, with optical height (hG) profile of lattice structure {G(x, y)}at least twice as much optical height (hR) profile relief patterns {R(x, y)}.

13. The element according to claim 9, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 350-550 nm, with optical height (hG) profile of lattice structure {G(x, y)}at least twice as much optical height (hR) profile relief patterns {R(x, y)}.

14. The element according to claim 1 or 2, characterized in that the lattice structure {G(x, y)} is a rectangular function.

15. The element according to claim 3, characterized in that the lattice structure {G(x, y)} is a rectangular function.

16. The element p is 4, characterized in that the lattice structure {G(x, y)} is a rectangular function.

17. The element according to claim 3, characterized in that the lattice structure {G(x, y)} is a rectangular function.

18. The item 14, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 250-400 nm, with optical height (hG) profile of lattice structure {G(x, y)}, at least 100 nm greater optical height (hR) profile relief patterns {R(x, y)}.

19. Element according to item 15, wherein the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 250-400 nm, with optical height (hG) profile of lattice structure {G(x, y)}, at least 100 nm greater optical height (hG) profile relief patterns {R(x, y)}.

20. Item by item 16, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 250-400 nm, with optical height (hG) profile of lattice structure {G(x, y)}, at least 100 nm greater optical height (hR) profile relief patterns {R(x, y)}.

21. The item 17, characterized in that the optical height (hG) profile of lattice structure {G(x, y)} has a value in the range of 250-400 nm, with optical height (hG) profile reset is the structure {G(x, y)}, at least 100 nm greater optical height (hR) profile relief patterns {R(x, y)}.

22. The element according to claim 1 or 2, characterized in that the lattice structure {G(x, y)} is a symmetric or asymmetric sawtooth function.

23. The element according to claim 3, characterized in that the lattice structure {G(x, y)} is a symmetric or asymmetric sawtooth function.

24. The element according to claim 1 or 2, characterized in that for connecting with the substrate (3) on the protective layer (6) is covered with an adhesive layer (7).

25. The element according to claim 3, characterized in that for connecting with the substrate (3) on the protective layer (6) is covered with an adhesive layer (7).



 

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The invention relates to fibrous materials, which are used to produce specialty paper

FIELD: production of a paper protected against a counterfeit.

SUBSTANCE: the invention is pertaining to manufacture of a paper protected against a counterfeit and used for manufacture of the important documents, such as banknotes, certificates and other analogous important documents, and which has at least one multilayer protective element capable to form at least one visually checkable optical effect. This protective element is at least partially is placed on the surface of the paper protected against a counterfeit and supplied at least with one integrated circuit. At that the protective element has at least one layer containing pigments with optically variable properties, first of all - interferential or liquid-crystal pigments. So the invention ensures production of a simple and inexpensive in manufacture important document, which allows to form an suitable to the visual control optical effect and simultaneously make it possible to conduct a machine check.

EFFECT: the ensures production of a simple and inexpensive in manufacture important document, formation of an suitable to the visual control optical effect and simultaneously permits a machine check.

73 cl, 10 dwg

FIELD: image printing technologies.

SUBSTANCE: required color is produced by mixing colors of image points, and on substrate fluorescent point of printing paints image are formed, which contain pigments fluorescent when excited by a certain electromagnetic emission, and also non-fluorescent image points of printing paints, containing colored pigments, non-fluorescent when excited by a certain electromagnetic emission. Aforementioned fluorescent image points and non-fluorescent image points are positioned on substrate in staggered order relatively to each other.

EFFECT: higher efficiency, higher quality.

2 cl, 4 ex

Protective element // 2255000

FIELD: production of optically diffraction protective elements.

SUBSTANCE: the invention is pertaining to production of optically diffraction protective element. The protective element with a sample formed out of the separated surfaces and having the form of a laminated structure used for notarization of authenticity of a document contains, at least, a transparent protective layer, a transparent varnished layer and an adhesive layer. The separated surfaces of the sample consist of the background surfaces and elements of the sample. At that in the field of the background surfaces the varnished layer is formed smooth and even and in the field of elements of the sample the relief structures with the definite optically effective depth "h" are formed in the varnished layer. The background surfaces for the light illuminating a laminated serve as the even reflecting planes and the relief structures are two-dimensional diffraction gratings, which are formed out of the bas gratings with the periods (dx;dy) and the periods (dx;dy) are smaller, than the given limiting wavelength (λ) in the shortwave part of the spectrum of the visible light so, that elements of the sample absorb and disperse the illuminating light. At that in each relief structure the ratio of the absorbed and the dispersed light is given and depends on the given optical effective depth (h) in the relief structure. Thus the invention ensures a high protection of an element against its reproduction by copiers.

EFFECT: the invention ensures a high protection of an element against its reproduction by copiers.

25 cl, 9 dwg

FIELD: polymeric industry.

SUBSTANCE: marker comprises substrate provided with organic polymeric surface, coating solidified by irradiation and applied on the organic polymeric surface, and coloring agent applied on the solidified coating. The substrate has light-reflecting layer. The coloring agent can not be removed by five-fold wiping the surface with petrol. The method comprises preparing the substrate and applying the coloring agent on the coating solidified by radiation. The substrate has light-reflecting layer.

EFFECT: prolonged service life.

28 cl, 6 dwg, 2 tbl

FIELD: important documents with protective attributes, combination of matters with two automatically controlled properties for protecting important documents against counterfeit, methods for making such documents and methods for testing authenticity of charred matters and ash.

SUBSTANCE: important document, mainly bank note or person certificate is characterized by use at least of two luminophors whose luminescent properties may be automatically and individually monitored. First luminophore irreversibly losses its luminescent properties at first temperature. Second luminophore irreversibly losses its luminescent properties at second temperature. First and (or) second temperature exceeds natural temperature of burning important document. It allows to identify document according to itself and also according to its ash and prevents possibility of illegal regeneration of materials designed for protecting against counterfeit in order to make duplicates of documents.

EFFECT: enhanced reliability of identifying important documents.

29 cl

FIELD: protective devices, applicable in such protected documents as banknotes, passports, visas, property rights, licenses, registration papers, cheques, transfers of money, warrants, etc.

SUBSTANCE: the magnetic/metal protective device for use with an object, so as to provide a great number of protective tags has a bearing base of a certain width. The magnetic/metal protective tag has a metal layer that is positioned at least on a section of the bearing base for provision of metal protective tags. The metal layer forms a great number of conducting sections on the bearing base. These sections are separated from one another by non-conducting sections, which pass completely through the entire width of the bearing base together with the magnetic layer, which is positioned at least on a lesser sections at least of one of the mentioned great number combination with it for provision of magnetic protective tags. And at least a part on at least one of the conducting section has hollows, which form visually recognizable tags.

EFFECT: enhanced reliability of protection of documents against forgery.

4 cl, 14 dwg

FIELD: protective marks.

SUBSTANCE: method for making protective marks on carrier having first surface and second surface opposite to first surface, includes sealing of first surface with high-resolution varnish, carrier is then electrolyzed and then washed and dried.

EFFECT: higher level of protection of forgery.

3 cl, 25 dwg

The invention relates to the production of securities, protected from tampering, for example, etching of printed or handwritten text, and can be used for production of documents, banknotes, etc
The invention relates to the manufacture of valuable papers and documents that are protected from the etching of the text

Valuable document // 2241603

FIELD: protective marks.

SUBSTANCE: method for making protective marks on carrier having first surface and second surface opposite to first surface, includes sealing of first surface with high-resolution varnish, carrier is then electrolyzed and then washed and dried.

EFFECT: higher level of protection of forgery.

3 cl, 25 dwg

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