Method for using protective element as protection from photo-copying

FIELD: protective element, having a composition of optically efficient structures in layered composite.

SUBSTANCE: protective element contains a layered composite for gluing onto substrate, containing form-making layer, protective layer of plastic material and reflective layer, which is positioned between form-making layer and protective layer of layered composite, while optically efficient structures of protective sign are formed in reflective layer. Protective sign has at least one surface with optical information element, on which reflective layer is made in form of mirror macro-structure with smooth profile, which in partial areas, forming relief display of information, is made curved so, that adjacent points with extreme values relatively to height of macro-structure profile are distanced for at least 0,3 millimeters. Point of macro-structure never has angle ±γ of local inclination of tangential surface to macro-structure, which angle is measured relatively to the surface of layered composite, greater than 7°. Surface with macro-structure is adapted for deflecting light, which falls in parallel manner at angle α relatively to normal onto surface of layered composite within limits of previously given angular range ε 14° around direction of mirror reflection, which includes angle (β=α) of reflection with normal line, so that element of optical information is visually visible, but can not be photo-copied.

EFFECT: high level of protection from photo-copying.

2 cl, 7 dwg

 

The invention relates to a protective element having composition is optically effective structures in layered composite described in paragraph 1 of the claims.

Protective elements of this type serve as protection from the photocopier and include a picture surface, containing a mosaic of surface elements with light modulating structures, which are formed in layered composite of plastic material. Protective elements are used for authentication of the original, and they are particularly suitable for protection of securities and bonds, banknotes, money, identity documents and documents of all kinds, in particular to prevent unauthorized Photocopying. The protective function of the sign is to provide the recipient of the products supplied to them, visual, and easily controlled specify that the product is genuine and not a copy. In this way prevent or at least make it extremely difficult introduction into circulation of a product, which is an unauthorized copy. But meanwhile, it should be noted that the modern technical level of development of analogue black and white copiers and digital colour copiers makes it possible to obtain copies of the documents, which virtually never Otley which are stated from the unprotected original.

Protective elements of this type using holograms and/or surface pattern of the diffraction structures are known from a large number of documents. As typical examples we mention the EP 0105099 A1, EP 0330738 A1 and EP 0375833 A1. Surface patterns differ in the brightness of the image and the effect of the movement in the picture. Diffraction patterns include a thin laminate of plastic material and is usually glued in the form of a stamp or label on the documents, such as banknotes, bonds or securities, qualification certificates, passports, visas, identity cards, etc. Color copies of these protective elements are colored picture without motion, so if the recipient does not pay attention to it and if the lighting is bad, color copy can be confused with the original protective element.

Another protective feature to prevent unauthorized copying of the document is known from EP 0522217. Pass-through stripes with metallic paste on the document. When copying the transfer strip with a metallic sheen plays as dark, and therefore creates a marked contrast to its reflective nature of the original. It's a simple message, which the user can easily understand, is sufficient to distinguish the copy from the original. Unfortunately, this is protection you can simulate on a copy so in low light conditions or with feverish haste copy can be represented by the original.

In document EP 0201323 B1 lists the materials that can be used for the manufacture of layered composite protective elements.

The task of the invention is to provide an inexpensive protective element, which is difficult to imitate and which includes a view that cannot be copied and connected devices.

This problem is solved by a protective element, containing a layered composite for bonding to a substrate, which has a forming layer, protective layer of plastic material and the reflective layer is positioned between the forming layer and the protective layer, the optically effective structure of the protective characteristic is formed in a forming layer, the protective trait has at least one surface with a mirror structure, curved in partial areas and/or separated by at least first and second partial surface, with the first partial surface occupied by the first structure and second achromatic structure formed in the second partial surface, and optical effective structure of the protective characteristic adapted for deflection of light incident in parallel, within a specified the corner of range (ε ) 14° around the direction of specular reflection, and the protective trait includes visually visible, but not fotokopirati piece of information.

The invention provides a number of advantages.

Curved mirror macrostructure, which rejects light essentially within the angular range, or two or more partial surfaces that deflect light essentially within this angular range, make it possible coding optical element information in the surface composite, which you cannot photocopy, but which is visible to the human eye.

As for achromatic patterns, it is the structure which deflects the incident light is essentially independent of wavelength.

Incident light is reflected, dirrahiuma or scatters achromatic structure is essentially independent of wavelength, so that a human observer under normal viewing distance of observation do not appear or appear only very weak, negligible color effects. This achromatic patterns made in the form, for example, macrostructure or structures brilliant diffraction gratings with a period of 6 μm or more, preferably one with a profile depth of about 0.25 μm. In addition, for example, depending on the depth of the relief with which ructur with the period from 6 to 3 μm is detected achromatic feature.

When using achromatic structures is achieved the advantage that in the case of these structures when determining angular range expansion effect of the light beam should not be taken into account, since the incident light is deflected by the optical structure around the direction of specular reflection. Therefore, you can ensure that the components of the light will not deviate beyond the specified angular range and will not become visible on the photocopy.

The preferred configuration of the invention set forth in the attached claims.

Below embodiments of the invention shown in the drawings and described in more detail using the drawings.

Fig. 1 is a cross-section of the protective element.

Fig. 2 is a view of the cross-section of the copy device.

Fig. 3 represents a graph of the response function copiers.

Fig. 4 is a view of the protective trait.

Fig. 5 depicts a view of the macrostructure.

Fig. 6 is a view of the document with the original protective element.

Fig. 7 depicts a view a copy of the document.

In Fig. 1 shows the layered structure of the composite 1, which cut off the protective elements 2. In layered composite 1 corresponding positions are marked and the outer cover layer 3, forming the layer 4, in the cat the rum generated optically effective structure 5, 6, the protective layer 7, the adhesive layer 8 for connection of the protective element 2 to the document 9 as a substrate, for example, bonds or securities, to the bill, the payment means, the ID or in the General case to the documents of all kinds.

The protective layer 7 fills the deepening of the optically effective structures 5, 6. Therefore, the boundary layer between the shape-forming layer 4 and a protective layer 7 made in the form of reliefs optically effective structures 5, 6. To improve the reflection at the boundary layer the boundary layer are in the form of the reflective layer 10. The reflective layer 10 contains a thin layer of highly reflecting metal, such as Al, Au, Cr, Te, etc., the thickness of the layer from 30 to 100 nm. In table 1 above patent document EP 0201323 B1 lists the inorganic dielectrics with a high refractive index, which is suitable as a reflective layer 10. Additional attractive color effects are created in the case of the interference layer as a reflective layer 10 with a large number of layered plots, consisting of alternating metal and dielectric layers. For example, it may be a double layer metal-dielectric in which the dielectric adjacent to the molding layer 4 and the metal adjacent to the protective layer 7, a triple layer in which the transparent dielectrics the th layer, for example, TiO2from 100 to 150 nm, is placed between the transparent metal layer, for example, of Al with a thickness of 5 nm, and a reflective metal layer, for example, of Al with a thickness of 50 nm, while reflecting opaque metal layer adjacent to the protective layer 7.

Layered composite 1 form a long blade (not shown here) of the carrier foil, while the first carrier foil is applied coating layer 3, and then in sequence forming layer 4, a reflective layer 10, a protective layer 7 and the adhesive layer 8. If the material of the protective layer 7 is adhesive, the adhesive layer 8 is not necessary. Reliefs optically effective structures 5, 6 form either before or after application of the reflective layer 10. Finally, the protective elements 2 cut from layered composite 1, paste on the substrate 9, and the carrier foil is removed. Since at least the covering layer 3 and forming the layer 4 is made transparent, the optical effects of the optically effective structures 5, 6 are visible to the observer through the covering layer 3 and forming the layer 4.

Optically effective structures 5, 6 are divided into first patterns 5 and the second structure 6 or embed in other macrostructure, discussed below. The first patterns 5 are, for example, the mirror structure, such as a smooth mirror on top of the spine, located parallel to the surface of the layered composite 1, or a diffraction grating acting as colored mirrors, any profile with spatial frequency f over 2400 lines/mm, and a special achromatic patterns of diffraction gratings. Light 11 incident in parallel, reflected by first mirror structures 5 in accordance with the laws of reflection, i.e. the angle α drop between the direction of the incident light 11 and the normal 12 to the surface of the layered composite 1 is equal to the angle β reflection, which is enclosed between the normal 12 and the direction of the reflected light rays 13 or mirror. Through diffraction gratings with high spatial frequency f>2400 lines/mm part of the incident light 11 in the visible spectrum dirrahiuma exclusively in the zero order of diffraction, i.e. at an angle β reflection. The second structure 6 are achromatic patterns, such as symmetric and asymmetric patterns sawtooth diffraction gratings with a spatial frequency component of at most 300 lines/mm, weakly scattering Matt structures and, for example, kinoform with the corresponding property.

Achromatic structure 6 sawtooth diffraction grating is characterized by a pronounced direction 39, the vector of the diffraction grating, and ostanovivshiy the region includes the angle γ the local slope of the patterns of the diffraction grating constituting the most ±7°preferably ±5° relative to the surface of the layered composite 1. In Fig. 1 for example shows the asymmetric structure of the diffraction grating as the second structure 6 with a pronounced direction 39, turned to the right.

Matt patterns scatter incident light 11 in a cone scattering divergence angle, which is determined by the scattering ability of the Mat structure and the direction of the reflected light 22 as the axis of the cone. For example, the intensity of scattered light is greatest at the axis of the cone and decreases with increasing distance relative to the axis of the cone, in this case, as for the light, which is deflected in the direction of forming the scattering cone, it still can be perceived by an observer. The cross-section of the cone perpendicular to its axis, is rotationally symmetric in the case of a Matt structure, which in this application is called "isotropic". In contrast to the "isotropic" Matt structures structural elements matte structures, which in this application are referred to as "anisotropic", have a preferred direction in the plane of the protective element 2. In the case of anisotropic Matt structure cross-section is tapered, then e is th elliptically deformed in a preferred direction, this short major axis of the ellipse parallel to the preferred direction. In the case of anisotropic Matt structure of the preferred direction and pronounced the direction 39, associated with anisotropic Matt structure, cover an azimuth angle of 90°.

Weakly scattering "isotropic" and "anisotropic Matt structure or kinoform deflect incident light 11 within a narrow cone of scattering angle ε discrepancies amounting to a maximum of 14°preferably 10°which is concluded between the generatrix 14, 15 of the scattering cone and the direction of the reflected light rays 13. For technical reasons, the height profile of the optically effective structures 5, 6 in layered composite 1 is limited by the value of N. the variation of lift, less 10 μm. Preferred values of N are in the range of from 0.05 to 2 μm. The value N is not a fixed value within the protective trait 30, since the value of N determined optically effective structures 5, 6 or macrostructure, locally beneficial to give different values of the specified range, in order to circumvent technological difficulties, in particular in the case of macrostructure.

In Fig. 2 shows a longitudinal section of a digital copier 16, intended for a color copy or black and white copied what I together with its functional components. A transparent glass plate 17 serves as a support for the document 9 and has a predefined format, such as A4, A3, etc. the Document 9 is placed on the glass plate 17 together with pasted-in protective element 2 (Fig. 1), turned to glass, and light through the glass plate 17 by a narrow strip, which runs in the transverse direction on the glass plate 17 and the document 9, respectively, while during the copy operation, the strip is moved along the glass plate 17. The lighting device 18 includes a carriage which can move under the glass plate 17 on the guide 34 in the direction of the arrows (marked positions) along the glass plate 17, the linear light source 19 and the focusing mirror 20, 21. In Fig. 2 of the lighting device 18 with the carriage, a source 19 of light and focusing mirrors 20, 21 extend perpendicular to the plane of the drawing over the entire width of the glass plate. White light emitted by the source 19 of the light is concentrated focusing mirrors 20, 21 on the document 9 through the glass plate 17 in the form of a narrow strip, approximately symmetrically with respect to the normal 12 (Fig. 1). Depending on the type of imaging device 16, the light incident on the document 9 has an angle of incidence of approximately 40 to 50° and from -40 to -50°. Light 22, which is scattered back to the protective element 2 and on the paper 9 in the direction of the normal 12, passes to the detector 26 with three flat deflecting mirrors 23, 24, 25. Inclined deflecting mirrors 23, 24, 25 and the detector 26 extend parallel to the source 19 of light and focusing mirrors 20, 21 along the length of the strip. On the longitudinal interval on a straight line detector 26 has a large number of photodetectors 27 for receiving light 22 backscattering. The number of photodetectors 27 per unit length is determined by the resolution of the imaging device 16. By means of the detector 26 is analyzed light 22 backscatter and formed electrical image strip, which is illuminated on the document 9. Analog copiers have comparable guiding device for the emitted light used for illumination and reception of light 22 backscattering.

In Fig. 3 depicts graphically the AF function of the response of the imaging device 16 (Fig. 2) in arbitrary units depending on the angle θ reflection of light 22 backscatter (Fig. 2) and the diffracted or scattered light relative to the direction of the reflected light rays 13 (Fig. 1). Region "A" in close proximity to the direction of specular reflection, i.e. in the direction of the reflected light rays 13, prostreets is from θ =0° to θ=15°. This angular range ε≈15° pre-defined structural diagram of a transfer device 16. In the field "And" copy device 16 is locked to exclude admission to the detector 26 specular reflections from the glass plate 17 and the document 9. Area "B" includes the angle θ reflections from 15 to 75°. Copy device 16 operates in this area, and the light 22 backscatter is received at the detector 26. Light 22 backscatter from the third region "C" in the corners θ>75° reflection not found copy device 16. For example, the light 22 backscatter from the white paper, strongly scattering surface, centered around a corner θ≈45° reflection. Any flat mirror or reflecting surface is reproduced in the copy device in black.

In Fig. 4 shows the protective element 2 is placed on the document 9. The protective element 2 has a mosaic picture surface 28 of the surface elements 29 with microscopically thin diffractive structures, mirrored surfaces and opaque structures. When daylighting and when turning or tilting of the protective element 2 surface elements 29 flash or flicker, so that the optical perception of surface patterns 28 continuously smenyaetsya.

Together with or instead of the surface pattern 28 of the protective element 2 includes a protective sign 30. In one embodiment of the invention, the surface 31 of the protective characteristic 30 is divided into at least corresponding to the first partial surface 32 and a second partial surface 33. The first partial surface 32 have one of the first structures 5 (Fig. 1), whereas the second partial surface 33 occupied one of the second structures 6 (Fig. 1).

The second structure 6 is an achromatic structure of the group of symmetric and asymmetric structures sawtooth diffraction gratings with a spatial frequency component of at most 300 lines/mm, weakly scattering Matt structures and kinoforms.

The first structure 5 is a structure that is parallel to the surface of the layered composite and selected from the group of flat, smooth mirror surfaces and diffraction gratings with a spatial frequency f of more than 2400 lines/mm, and achromatic structures sawtooth diffraction gratings, and "anisotropic Matt structures, when they are pronounced the direction 39 (Fig. 1) and pronounced the direction 39, associated with the second structure 6, differ by at least the azimuthal angle 25°.

Mainly two partial surfaces 32, 33 have a common boundary, and so the partial surface directly adjacent and/or one partial surface 32 or 33 is located within the other partial surface 33 or 32, respectively. According to another variant of the invention, multiple ones of the partial surfaces 32 or 33 is placed on the other partial surface 33 or 32, respectively, which forms the background so that several some partial surfaces 32 and 33, respectively, form a visually clearly visible piece of information, for example, in the form of text and/or logo or graphic information. Therefore, the protective sign 30 is also large and has a surface area of at least 0.5 cm2preferably greater than 1 cm2while the smallest size is at least 0.5 mm

The protective element 2 is cut from the laminated composite 1 of plastic material and is applied to the document 9. Optically effective structure 5, 6 protective characteristic 30 and, if applicable, the diffraction patterns, the mirror surface and matte surface structure of the elements 29 of the surface pattern 28 formed in the reflective layer 10 (Fig. 1), which is included between the shape-forming layer 4 and the protective layer 7. In accordance with the configuration of the protection element 2, the reflective layer 10 has a macrostructure in the surface 31 of the protective sign 30 and/or the reflective layer 10 is divided into at least first and second partial surfaces 32, 33. The first partial surface 32 is occupied by one of the first structure is ur 5, which are parallel to the surface of the layered composite 1 and which deflect incident light 11 in the direction of specular reflection in the form of the reflected light 13 (Fig. 1). One of the second structures 6 are formed on the second partial surface 33 and deflects incident light 11 within the angular range defined by the cone of scattering at an angle ε divergence (Fig. 1) around the direction of specular reflection.

In Fig. 5 shows the configuration of the protective sign of 30 with one of macrostructure 35. Together with or instead of the discrete composition of the first and second partial surfaces 32 (Fig. 4) and 33 (Fig. 4) the only surface 31, which is made a curved surface sections, the macrostructure 35, is also introduced into the protective sign 30. The reflective layer 10 with the macrostructure 35 placed between the molding layer 4 and a protective layer 7 has a curved configuration 36 on specific surface sites. Profile macrostructure 35 is smooth in microscopic areas or profile combined with one of the opaque structures or microscopically small diffraction grating spatial frequency f of the diffraction grating is greater than 2400 lines/mm, Profile macrostructure 35 is a function M(x, y) x, y coordinate that specifies the surface 31 of the protective trait 30, wherein m is Nisha least in partial areas of the macrostructure 35 Δ M(x, y)≠0. Curvilinear configuration 36 logically follow from known mathematical functions defined by the function M(x, y), and the boundary or the approximate form of graphic symbols or letters, or microstructure 35 is a relief depicting known for coins or gems. Tangential surface to the macrostructure 35 at any point has no angle γ local slope equal more ±7° relative to the surface of the layered composite 1 (Fig. 1). In one embodiment of the invention macrostructure 35 has a reflective layer 10, which is made in the form of the interference layer.

To get through the macrostructure 35 optical effects that are visible to the naked eye, neighboring points with extreme values relating to the height profile of the macrostructure, have a separation of at least 0,3 mm As in layered composite 1 is N variations of the optically effective structures 5 (Fig. 1), 6 (Fig. 1) for technical reasons to limit the size of about 10 microns, the macrostructure 35 formed in the molding layer 4 with a height profile modulo value N. Designated 37 breaks that occur as a result of this, should not be considered as extreme values.

In Fig. 6 shows a top view of the original document 9. In this embodiment of the invention the protective characteristic 0 as an element of information is the letters "OK" which is composed of the second partial surfaces 33 with second achromatic structures 6 (Fig. 1) and in the background of the first partial surface 32 with the first mirror structure 5 (Fig. 1). An item of information or the second partial surface 33, a protective characteristic 30 when illuminated with white light is presented to the observer with specular reflection in grey on bright brilliant background of the first partial surface 32 with the first mirror surface 5, as achromatic patterns 6 a second partial surface 33 deflect incident light 11 (Fig. 1) past the eye of the observer.

This should be understood when referring to Fig. 1. For simplicity in this case is not taken into account the effects of refraction on the light beams on the transition of the air-layer composite 1. Light 11, which falls at an angle α fall, is deflected by a mirror structure 5 in the first partial surface 32 in the direction of the reflected light 13. In this case, the azimuth of the above mirror surfaces 5 doesn't matter. If the light 11 falls to the structure of the diffraction grating achromatic structure 6 in the presence of angle γ local tilt, angle α drop will be less due to the corner γ local slope, because the normal 12 and normal to the inclined surface patterns of the diffraction grating include angle γ the local slope. In the case of asymmetric patterns of the diffraction grating, the local angle of inclination corresponds to the angle Shine. The structure of the diffraction grating deflects the incident light 11 in the direction of the reflected light 11, and in this case, the reflection angle relative to the normal to the surface is also smaller local angle of inclination, and with respect to the normal line 12 is equal to twice the angle γ. Since the angle γ tilt is at most ±7°, the direction of the light rejected by the structure of the diffraction grating is different from the direction of the reflected light 13 at the most at ±14°. If the observer randomly rotates and tilts document 9 together with the protective element 30 (Fig. 6) so that the observation direction is in the same plane as the vector of the diffraction grating structure of the diffraction grating, related to achromatic second structure 6, the second partial surface 33 suddenly become lighter compared to the background of the first partial surface 32, since the direction of the reflected light 13 is focused by the eye of the observer. If the second partial structure 33 described above isotropic Matt structure is used as a second achromatic patterns 6, the ambient light regardless of the azimuth is distributed in the limit is x the scattering cone, a limited form 14, 15. In the direction of the reflected light 13 scattered light from the second partial surface 33 is less intense than the reflected light 13 from the first partial surface 32. Within the cone of dispersion, in the zone, the intensity of scattered light is greater than the intensity from the mirror surface, i.e. the second partial surface 33 is lighter than the first partial surface 32. The intensity of scattered light decreases quickly towards the surface of the scattering cone, so that the outside of the cone of dispersion of the second partial surface 33 again darker than the first partial surface 32. The change in intensity between the partial surfaces 32, 33 of the protective characteristic 30 is a sign of authenticity.

In another configuration, the protective sign of 30, performed in the first partial surface 32 as the first structure 5 is achromatic structure sawtooth diffraction grating or anisotropic Matt structure with the first distinct direction 39, along with the fact that the second partial surface 32 is formed as the second structure 6 is achromatic structure sawtooth diffraction grating or anisotropic Matt structure, with its pronounced direction 39 differs from the first bright expr is spent directions 39 at least with respect to azimuth. For example, achromatic structure sawtooth diffraction gratings of the first patterns 5 is a mirror image of the second structure 6.

To the maximum surface brightness of the partial surfaces 32, 33 with achromatic structures of the diffraction grating was observed only in a narrow angular range of the azimuth, achromatic patterns of diffraction gratings are placed in the pixel elements. Each pixel element achromatic patterns of the diffraction gratings have a polygonal or circular recesses with a constant spatial frequency f. Vectors diffraction gratings these structures, diffraction gratings directed radially outward from the center of the pixel element. Information represented by the partial surfaces 32 and 33, respectively, are formed, for example, square pixel elements with a side length of at least 0.5 mm, and the corresponding vectors of diffraction gratings of each of the pixel element is oriented parallel to or in accordance with a predetermined pattern. When the protective element 2 is turned, the presence of the predetermined pattern causes the movement of the maximum surface brightness partial surfaces 32 and 33, respectively.

Additional primary protective property p is of ISACA 30 is obtained by the use of various achromatic structures of diffraction gratings in a large number of some partial surfaces 32 and 33, respectively, located on the background of the other partial surface 33 and 32, respectively. In one embodiment of the invention, the vectors of diffraction gratings are oriented parallel pronounced direction 39 in three partial surfaces 32 and 33 respectively. When the protective element 2 tilts around an axis parallel to a pronounced direction 39, partial surfaces 32 and 33 are consistently achieved the maximum surface brightness. For example, three partial surfaces 32 and 33 are achromatic patterns of diffraction gratings with a spatial frequency f 160 lines/mm, Three patterns of diffraction gratings different angles gloss values, and variations of 150, 250 and 400 nm. If in contrast achromatic patterns of the diffraction gratings have the same profile and various pronounced trends 39, the maximum surface brightness of the partial surfaces 32 and 33 are consistently achieved by turning the protective element 2 around the normal 12. In another embodiment, the angle Shine, and pronounced the direction 39 change from one partial surface 32 and 33 respectively to the next.

Copy of the original shown in Fig. 6, shown in Fig. 7. Because copying device 16 (Fig. 2) blocked in areas "A" (Fig. 3) and "C" (Fig. 3), that is kopirovannym device 16 are copied only those surface elements 29 surface pattern 28 (Fig. 5), which scatter or giragira light in the region "b" (Fig. 3). For example, the surface element 29', which is rectangular in form, as shown in Fig. 6, has a diffraction grating, which itself can be diffracted light in the region "B", but the vector of the diffraction grating is oriented perpendicular to the light imaging device 16 in the plane of the glass plate 17 (Fig. 2). Accordingly, the surface element 29' does not meet the condition copy. However, copier 16 can play a rectangular surface element 29' in the dim mixed color or in shades of gray, if the intensity of the light 22 backscatter (Fig. 2) of a rectangular surface element 29' is not too low. When turning the protective element 2 in its plane surface element 29 differently oriented on the glass plate 17 (Fig. 2). Rectangular surface element 29', the vector of the diffraction grating which is now oriented almost perpendicular to the stripe of light, now fully dirigeret incident light 11 (Fig. 1) in the direction of the light 22 backscattering; instead, the intensity levels of other surface elements 29 become less or almost zero, so that the copy surface pattern 28 (Fig. 6) will depend on the orientation of the glass is th plate 17 (Fig. 2) copy device 16.

In contrast, the protective sign 30 behaves differently when optically effective structure 5 (Fig. 1), 6 (Fig. 1) partial surfaces 32 (Fig. 6), 33 (Fig. 6) in each azimuthal direction deflect incident light 11 in region "a" and "C". So the copy surface 31 of the protective characteristic 30 is reproduced in the same black color, regardless of the azimuthal orientation of the document 9 on the glass plate 17 copier 16. Therefore, the protective sign contains 30 visually visible, but not fotokopirati item information. The advantage of this protective characteristic 30 is in its independence from the azimuthal orientation relative to the imaging device 16.

According to another variant of the invention, the surface elements 29 of the protective element 2 extends within the protective trait 30, for example, in the form of narrow linear strips 38. At least one surface element 29 is made in the form of a meander pattern of intersecting lines of the grid and divides the surface 31 on a small partial surfaces 32, 33. When the protective element 2 is in a given orientation, the strip 38 is presented to the person looking at the original, as a very bright line in one of the strips 38 is already sufficient line width of at least 0.05 m is; it is preferable that the line width was from 0.1 to 0.3 mm Protective sign 30 through the strips 38 are protected from a simple simulation using household aluminum foil.

1. The protective element (2), containing a layered composite (1) for bonding to the substrate (9), containing molding layer (4), a protective layer (7) of plastic material and the reflective layer (10), included between the shaping layer (4) and a protective layer (7) layered composite (1)with an optically effective structure (5; 6) protective trait (30) formed in the reflective layer (10), characterized in that the protective trait (30) has at least one surface (31 with the optical element of the information on which the reflective layer (10) made in the form of the mirror microstructure (35) with a smooth profile, which is in partial regions, forming a relief image information made curved so that neighboring points with extreme values relative to the height profile of the macrostructure (35) separated by at least 0.3 mm and that there is no point macrostructure (35) has no angle (±γ) local slope of the tangential surface to the macrostructure (35), measured relative to the surface of the layered composite (1), more 7°so that the surface (31) with the structure (35) is adapted for deflection of light (11), which drops the pair is mounted at an angle (α ) relative to normals (12) on the surface of the layered composite (1) within a predefined angular range (ε) 14° around the direction (13) specular reflection, which includes angle (β=α) reflection with a normal (12), so that the optical element information is visually visible, but not fotokopieren.

2. The protective element according to claim 1, characterized in that the profile of the macrostructure (35) combined with the structure of the group Matt structures, kinoforms and diffraction gratings acting as a color mirror with spatial frequency (f) of more than 2400 lines/mm

3. The protective element (2), containing a layered composite (1) for bonding to the substrate (9), containing molding layer (4), a protective layer (7) of plastic material and the reflective layer (10), which is included between the shaping layer (4) and a protective layer (7) layered composite (1) and in which the formed optically effective structure (5; 6) protective trait (30), while the protective trait (30) has at least one surface with an item of optical information formed at least the first and second partial surface (32; 33), characterized in that the first partial surface (32) contain one of the optically effective first structures (5), and the second partial surface (33) contain one of achromatize the fir, optically effective second structures (6), so that the first structure (6) represent the mirror structure, the fact that the second achromatic patterns (6) are of angle (±γ) local slope at most 7°and the fact that the optically effective structure (5; 6) are adapted for bending light (11), which falls in parallel angle (α) relative to normals (12) on the surface of the layered composite (1) in a preset angular range (ε) 14° around the light rays, reflected in the direction (13) of the mirror reflection surface of the layered composite (1), so that the optical element information is visually visible, but not fotokopieren.

4. The protective element (2) according to claim 3, characterized in that the first structure (5) is a flat and smooth mirror surface located parallel to the surface of the layered composite (1).

5. The protective element (2) according to claim 3, characterized in that the first structure (5) is a diffraction grating, which is parallel to the surface of the layered composite (1) and which has any profile, and has a spatial frequency (f), comprising of more than 2400 lines/mm, and acts as a colored mirror.

6. The protective element (2) according to one of p-5, characterized in that the second achromatic structure (6) represents the structure is round sawtooth diffraction grating with a period of 6 μm or more and with a pronounced direction (39), the corresponding vector of the diffraction grating, and the fact that the angle of the brilliance of the second structure (6) is the angle (γ) local slope.

7. The protective element (2) according to claim 3, characterized in that the first structure (5) and second achromatic structure (6) represent patterns sawtooth diffraction gratings with a period of 6 μm or more, the corners of the luster which include the angle (γ) local slope, and the fact that the first and second patterns (5, 6) vary the azimuth of their distinct directions (39)corresponding to the vectors of diffraction gratings.

8. The protective element (2) according to one of p 5, characterized in that the second partial surface (33) is divided into pixel elements, each pixel element achromatic structure of the diffraction grating with a sawtooth profile has a polygonal or circular grooves, and the fact that the sawtooth structure of the diffraction grating has a spatial frequency of at most 300 lines/mm and the angle (γ) local slope as the angle Shine.

9. The protective element (2) according to one of p-5, characterized in that the second achromatic structure (6) is represented from the group of weakly scattering Matt structures and kinoforms, and the fact that the second structure (6) scatters incident light (11) in a narrow cone of scattering within a pre-set angles of the th range (e).

10. The protective element (2) according to claim 3, characterized in that a large number of second partial surface (33) with achromatic structures (6) is located on the first partial surface (32) with one of the first mirror structures (5), and the fact that achromatic patterns (6) different angles (γ) local slope and/or distinct directions (39)corresponding to the vector of the diffraction grating.

11. The protective element (2) according to one of claim 1 or 3, characterized in that the reflective layer (10) is a multilayer interference layer containing dielectric and metal layers, with a layer that is transparent to light (11), is about forming layer (4), and an opaque metal layer is about protective layer (7).

12. The protective element (2) according to one of claim 1 or 3, characterized in that the reflective layer (10) comprises at least a dielectric transparent layer containing TiO2and having a thickness of 100 to 150 nm.

13. The protective element (2) according to one of claim 1 or 3, characterized in that the reflective layer (10) comprises at least a transparent metal layer between forming the layer (4) and a transparent dielectric layer.

14. The protective element (2) according to one of claim 1 or 3, characterized in that the reflective layer (10) is a layer of meta is La from the group of aluminum, gold, chromium and tellurium.

15. The protective element (2) according to one of claim 1 or 3, characterized in that the height of the shaped profile of the optically effective structures (5; 6; 35) made reduced using modulo value (N) variation, and the value (N) variation is a value in the range from 0.05 to 10 μm.

16. The protective element (2) according to one of claim 1 or 3, characterized in that the protective trait (30) is surrounded by a mosaic layout surface protective elements (29) with different organizations having an optical diffraction effect, and the fact that the mosaic arrangement forms an optically variable surface pattern (28).

17. The protective element (2) according to one of claim 1 or 3, characterized in that at least one having a linear shape of the surface element (29) with different structures exhibiting optical-diffraction effects, extends in the form of a strip (38) over the protective trait (30).



 

Same patents:

Important document // 2286885

FIELD: printed important documents.

SUBSTANCE: important document has at least one authenticity sign, which is made using luminescent substance on basis of crystalline latticework of base. Crystalline latticework of base is alloyed with at least one chromophore with electronic configuration (3d)2.

EFFECT: increased level of protection of important document from forgery.

7 cl, 3 dwg, 3 ex

FIELD: printed matter of special format.

SUBSTANCE: multi-layered article comprises the layer sensitive to the laser radiation, marking member, e.g., diffraction and/or holographic structure, reflecting layer, and print formed in the second layer and/or in the layer sensitive to the laser radiation. The layer sensitive to the laser radiation has markers that are made by means of laser radiation and precisely positioned with respect to the marking member.

EFFECT: enhanced reliability of protection.

27 cl, 40 dwg

FIELD: devices for protecting books or documents.

SUBSTANCE: protecting member comprises substrates, planar or dispersed metallized coverings with a definite specific resistance, and conducting polymers with a definite specific resistance. The difference between the specific resistances exceeds 100 KOm/m.

EFFECT: enhanced reliability.

14 cl, 8 dwg, 7 ex

FIELD: manufacturing multi-layered films.

SUBSTANCE: film comprises base made of bi-axially oriented polypropylene film and polyolefin film. Before laminating, the polyolefin film is colored. The multi-layered film is oriented in transverse direction or longitudinal direction and transverse direction after laminating. The thickness of the multi-layered film ranges from 8 μm to 26 μm. The method of producing the multi-layered film is also presented.

EFFECT: expanded functional capabilities.

9 cl, 3 ex

FIELD: protective system for checking authenticity of valuable documents.

SUBSTANCE: protective system in case of falling light can reconstruct a pattern outside the plane of carrier in holographic way, which pattern contains concealed information. System contains surface, at least partially transparent verification element, which in case of surface contact with protective element allows reading of information stored in it.

EFFECT: higher level of protection from forgery, increased reliability of authenticity check.

9 cl, 8 dwg

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

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: technology for checking authenticity of document with counter-falsification protection, and also document with perforations of elongated transverse section.

SUBSTANCE: in accordance to method for checking authenticity of document, aforementioned document contains carrier with multiple perforation, and at least some perforations have elongated transverse cross-section with minimal and maximal diameter. Checking method assumes presence of document examination stage, in at least one direction of examination, which is not perpendicular to surface of carrier, and determining authenticity of document on basis of value of optical light penetration through aforementioned perforations.

EFFECT: high counter-falsification protection on basis of use of perforations.

2 cl, 6 dwg

Important document // 2286885

FIELD: printed important documents.

SUBSTANCE: important document has at least one authenticity sign, which is made using luminescent substance on basis of crystalline latticework of base. Crystalline latticework of base is alloyed with at least one chromophore with electronic configuration (3d)2.

EFFECT: increased level of protection of important document from forgery.

7 cl, 3 dwg, 3 ex

Important document // 2286885

FIELD: printed important documents.

SUBSTANCE: important document has at least one authenticity sign, which is made using luminescent substance on basis of crystalline latticework of base. Crystalline latticework of base is alloyed with at least one chromophore with electronic configuration (3d)2.

EFFECT: increased level of protection of important document from forgery.

7 cl, 3 dwg, 3 ex

FIELD: optics.

SUBSTANCE: the optically changeable plane specimen is made of partial elements with diffraction reflecting structures and mirror-reflecting partial elements for formation of two or more images, which at illumination by light falling perpendicularly to the plane specimen may be perceived singly by the observer at an observation distance equal to 30 cm at different angles of view. The partial elements contain achromatically diffracting saw-tooth relief structures with saw-tooth inclination angles relative to the plane of the plane specimen. The relief structures related to various images have different angles of inclination, and the value of the maximum angle of inclination makes up maximum 25 deg, so that the difference of the angles of view for light beams reflected from relief structures at least of two images is less than the difference of angles equal to 30 deg. determined by a duplicator, due to it the copy produced with the aid of a duplicator reproduces at least two images by imposition one on the other.

EFFECT: produced optically changed plane specimen, which provides for an improved protection against copying.

11 cl, 9 dwg

FIELD: printed matter of special format.

SUBSTANCE: multi-layered article comprises the layer sensitive to the laser radiation, marking member, e.g., diffraction and/or holographic structure, reflecting layer, and print formed in the second layer and/or in the layer sensitive to the laser radiation. The layer sensitive to the laser radiation has markers that are made by means of laser radiation and precisely positioned with respect to the marking member.

EFFECT: enhanced reliability of protection.

27 cl, 40 dwg

FIELD: devices for protecting books or documents.

SUBSTANCE: protecting member comprises substrates, planar or dispersed metallized coverings with a definite specific resistance, and conducting polymers with a definite specific resistance. The difference between the specific resistances exceeds 100 KOm/m.

EFFECT: enhanced reliability.

14 cl, 8 dwg, 7 ex

FIELD: devices for protecting books or documents.

SUBSTANCE: protecting member comprises substrates, planar or dispersed metallized coverings with a definite specific resistance, and conducting polymers with a definite specific resistance. The difference between the specific resistances exceeds 100 KOm/m.

EFFECT: enhanced reliability.

14 cl, 8 dwg, 7 ex

FIELD: manufacturing multi-layered films.

SUBSTANCE: film comprises base made of bi-axially oriented polypropylene film and polyolefin film. Before laminating, the polyolefin film is colored. The multi-layered film is oriented in transverse direction or longitudinal direction and transverse direction after laminating. The thickness of the multi-layered film ranges from 8 μm to 26 μm. The method of producing the multi-layered film is also presented.

EFFECT: expanded functional capabilities.

9 cl, 3 ex

FIELD: protective system for checking authenticity of valuable documents.

SUBSTANCE: protective system in case of falling light can reconstruct a pattern outside the plane of carrier in holographic way, which pattern contains concealed information. System contains surface, at least partially transparent verification element, which in case of surface contact with protective element allows reading of information stored in it.

EFFECT: higher level of protection from forgery, increased reliability of authenticity check.

9 cl, 8 dwg

FIELD: information carrier with a structure possessing optically variable properties, embossing die designed for manufacture of the carrier, method for manufacture of the carrier and use of the die for its manufacture.

SUBSTANCE: the information carrier (1) has a structure (2) possessing optically variable properties, consisting of an embossed structure and a coating contrasting with the surface of the information carrier. Such an embossed structure and a coating are combined in such a way that at least some sections of this coating are completely seen at a right angle of vision, and at an acute angle of vision they become invisible as a result of which a Kipp-effect is produced at an alternative consideration at right and acute angles of vision. Such a coating is made uniform, and the embossed structure is subdivided into separate sections with various embossed substructures provided on them.

EFFECT: enhanced degree of carrier protection against falsification by reproduction, enhanced convenience of visual check.

55 cl, 10 dwg

FIELD: manufacturing multi-layered films.

SUBSTANCE: film comprises base made of bi-axially oriented polypropylene film and polyolefin film. Before laminating, the polyolefin film is colored. The multi-layered film is oriented in transverse direction or longitudinal direction and transverse direction after laminating. The thickness of the multi-layered film ranges from 8 μm to 26 μm. The method of producing the multi-layered film is also presented.

EFFECT: expanded functional capabilities.

9 cl, 3 ex

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