Thin-film element having interference layer structure

FIELD: physics.

SUBSTANCE: invention relates to a thin-film element (30) having an interference layer structure for security papers, value documents and the like, having at least two semitransparent absorber layers (34, 38) and at least one dielectric spacing layer (36) arranged between the at least two absorber layers. According to the present invention, each of the two absorber layers (34, 38) consists of material having a complex refraction index N whose real part n and imaginary part k differ at least in a portion of the visible spectral range by a factor of 5 or more.

EFFECT: improved protection.

23 cl, 8 dwg

 

This invention relates to a thin-film element with an interference layer structure for counterfeit securities, valuable documents etc, which contains at least two semi-transparent, partially transparent, absorbing layer and at least one dielectric spacer layer located between at least two absorbent layers. In addition, this invention relates to translucent protective element and a data carrier with such a thin-film element, and pigments with variable optical properties for printing ink formed of such thin-film elements.

For the protection of data media, in particular, valuable documents, certificates and other valuable items, such as branded products, they often supply protective elements. These elements allow you to verify the authenticity of the data carrier, at the same time they serve as protection against unauthorized reproduction. In recent years it was found that the transparent window is an interesting protective elements for the polymer, and more recently to paper banknotes, as they allow you to apply a large number of security features.

A special role in the protection against counterfeiting play a protective elements with effects that depend on the angle of observation, as ateelement cannot be reproduced even by the most modern copiers. Protective elements equip items with variable optical properties, when observing them from different angles, the observer receives various visual perception, for example, depending on the angle element shows different color or brightness and/or other graphic motif.

In this regard, there is a method of applying a protective elements with multilayer thin-film elements, the perception of color of which changes depending on the angle: when bending thin-film element color changing, for example, from green to blue, from blue to purple, or Magenta to green. Following the occurrence of such changes color when you tilt thin-film element is called the effect of changing color depending on the angle of observation.

On this basis, the objective of the invention is to provide a thin-film element named type, which has a spectacular appearance and a high degree of protection against forgery.

This problem is solved thanks to the thin-film element, a translucent protective element, the pigments with variable optical properties and carrier data with the features of independent claims. Improved embodiments of the invention are subject of the dependent claims.

p> In accordance with the invention, in the thin-film element of this type each of the two absorbing layers consists of a material having a complex refractive index N=n+ik, the real part n and imaginary part k of which, at least in part of the visible spectrum, differ in 5 or more times.

In this case, both absorbing layer may consist of the same material or from different materials. The use of different materials, in particular, may be preferred for technological reasons, for example to ensure a good bond between the layers, including the upper absorbent layer. Therefore, in the preferred embodiment of the invention two absorbing layers consist of different materials, and the real part n1 and imaginary part k1 of the material of one of the two absorbing layers different in 5 or more times, at least in part of the visible spectrum, and the real part n2 and the imaginary part k2 of the material of the other of the two absorbent layers differ in 8 or more, preferably 10 or more, particularly preferably 15 or more times.

In preferred variants of the invention, the real part n and imaginary part k of the materials of the two absorbing layers differ at least in part, the species is considered as the range of the spectrum, even at 8 or more, preferably 10 or more, particularly preferably 15 or more. The real part n and imaginary part k of the material of at least one of the two absorbing layers differ across the visible range of the spectrum in even 5 or more, 8 or more, 10 or more, or 15 or more times.

At least one absorbing layer, preferably both absorbing layer, preferably made of silver. Proven options in which one of the absorbing layer or both absorbing layer is made of aluminum. Currently, most saturated colors in transmitted light reaches through a system of layers of silver/dielectric/silver. Less saturated in colour, but more simple in manufacturing are thin-layer elements with layers of aluminum/dielectric/aluminum. Simple in manufacturing are also system layers silver/dielectric/aluminum, color saturation which lies between these two systems of layers, and which, since the aluminum layer is on top, also can be made without encountering the problems with communication between layers.

The thickness of both the absorbing layer and the dielectric layer are preferably aligned with each other so clitorally element in accordance with a specified color space CIELAB luminance L* has sufficient transmittance from 10%to 70%, preferably from 20 to 50%. If the absorbing material can be applied to silver, the thickness of the silver layers is preferably from 20 to 30 nm.

In a preferred embodiment of the invention the interference layered structure of thin-layer element is a symmetrical three-layer structure consisting of the first absorber layer, a dielectric separation layer and second absorbing layer, which consists of the same material as the first absorbing layer and has the same thickness as the first absorbent layer. Here in the case of the interference of the layered structure of speech, in particular, can go about the layer system silver/dielectric/silver or system, aluminum/dielectric/aluminum.

In an alternative embodiment of the invention, which is also preferred, interference layered structure is an asymmetric three-layer structure consisting of a first absorbing layer of the first material, the dielectric separation layer and second absorbing layer from a second, different material. In this case, the interference layered structure, in particular, is a layered structure silver/dielectric/aluminum.

Dielectric separation layer is preferably made of SiO xor MgF2. Usually the thickness of the dielectric separation layer is from 90 nm to 400 nm. Since the thickness of the dielectric separation layer largely determines the color impression of the thin-film element, as further explained below, it is chosen depending on the desired color perception and the desired intensity effect changes color depending on the angle of observation.

In a preferred embodiment of the invention when observed in reflected light thin-film element has a metallic luster and are essentially neutral color when observed in transmitted light, he perceived in color. In transmitted light thin-film element preferably has a color saturationCab*defined in CIELAB color space, more than 15, preferably more than 20, particularly preferably more than 25.

In a preferred embodiment of the invention for observing at right angles in transmitted light thin-film element looks green and has a color saturationCab*more than 30, preferably more than 40. Another Avenue is doctitle embodiment of the invention for observing at right angles in transmitted light thin-film element is visible yellow and has a color saturation Cab*more than 10, preferably more than 20. In yet another preferred embodiment of the invention for observing at right angles in transmitted light thin-film element is visible in red and has a color saturationCab*more than 20, preferably more than 30. In yet another preferred embodiment of the invention for observing at right angles in transmitted light thin-film element visible blue and has a color saturationCab*more than 20, preferably more than 30.

In a preferred embodiment of the invention in transmitted light thin-film element has a color and shows the effect of changing color depending on the angle at which the color impression in transmitted light varies with the slope of the thin-film element. In transmitted light color perception may vary, for example, from purple colors when observed at a right angle to green when the observation angle. In an alternative embodiment of the invention, which changeables preferred in transmitted light thin-film element has a color, and when the slope remains essentially sitosterolin, but with a modified saturation of color in transmitted lightCab*. In transmitted light, the observer can see, for example, blue color, and the saturation of the blue color in transmitted light varies from high values at observation at right angles to a lower value when the observation angle. In this embodiment, when the tilt thin-film element only changes the perceived saturation in transmitted light blue color.

In an improved embodiment of the invention the thin-film element is combined with a color filter, preferably with a color printed layer or a color sprayed layer. When this thin film element and a color filter can be coordinated with each other so that when observed from a certain direction of the thin-film element and a color filter in each case transmit light only in a different, non-overlapping areas of the spectrum. In this case, when viewed from this direction, the combination of thin-film element and a color filter, is black, because both elements of the AMI is not passed no color. When viewed from other directions in the region of the spectrum, in which the thin-film element transmits the light shifted so that this region overlaps with the region of the spectrum, in which the light is passed a colour filter. Therefore, a certain part of the light passed both elements. Thus, you can create a translucent protective elements, which when tilted to show the transition from black or black and often especially the imagination of the observer.

In preferred embodiments, the implementation of the thin-film element exists in the form of patterns, characters or a code. Here is also an option, which is located on the entire surface of the thin-film element has gaps in the form of patterns, characters or a code.

The proposed thin-film element can preferably be combined with a relief structure, for example, with a diffractive relief structure (e.g., a hologram), microoptical relief structure (for example, microlensing structure, three-dimensional image of the sawtooth structures or structure, the size of which is less than the wavelength (for example, the grating period smaller than the wavelength, microrelief structure of "moth eye"), in particular, it can apply for such relief structure. As a result, the effects of changes in the optical the properties mentioned relief structures can be combined with the described explicit color effect, occur when observed in transmitted light and, depending on the circumstances, with obvious effect of changing color depending on the angle of observation in transmitted light.

In addition, the proposed thin-film element can be combined with other coatings with variable optical properties, in particular with a coating, which themselves are a combination of sites with varying color and permanent color.

Further, this invention covers the translucent protective element is protected against forgery of securities, valuable documents, etc. that contains the carrier and deposited on the carrier of the thin-film element of the type described. When this thin film element supported on a carrier, preferably in the form of a motif. In addition, in the preferred embodiment of the invention on the upper surface of which is directed in the direction opposite from the media side, the thin-film element is equipped receptive to printing ink layer. In the case receptive to printing ink layer mainly talking about white matte paint.

In the latter case, the thin-film element can implement, for example, is protected from a fake paper or other media data, and it can form in the data carrier color element type of the watermark. For this thin-film element is applied,in particular, in the form of a motif on a strip of film, at least in places. Then, in the case of multilayer banknotes paste it on the paper and on the top side white print receptive to printing ink layer, so that when observed in reflected light the area with thin-film element to recognize is almost impossible. However, in this case, when observed in transmitted light thin-film element is visible colour. Unexpectedly it was found that, in particular, thin-film elements, which when observed in transmitted light are green, when observed in transmitted light through the paper of normal thickness is still clearly recognizable in color, and because of the different appearance when observed in reflected and transmitted light they form elements of type watermarks to the same color.

Very preferably, in another part of the same strip of film is another translucent protective element for a window so that the element for the window and the colored element type of the watermark can be fabricated during the same process operations.

In addition, this invention contain pigments with variable optical properties for printing inks, which are formed of thin-film elements of the described type.

Finally, this invention provides a data carrier with a thin-film element of the om or translucent protective element of the type described, moreover, the thin-film element or translucent protective element, in particular, is located in the transparent area with a window or over a transparent area with a window, or in a through hole or a through hole of a data carrier. In addition, this invention provides a data carrier with a thin-film element or translucent protective element of the type described, and thin-film element or translucent protective element is embedded in the media data. In particular, the media data may include a paper substrate, in which an embedded thin-film element or translucent protective element.

In the case of a data carrier speech, in particular, can be a valuable document, for example, the bill, in particular banknote paper, polymer banknote or banknote with a multilayer film, or about the identity, for example, credit card, Bank card, cash card, badge, identification card or the passport page with personalizes data.

Below based on the drawings are explained other embodiments and advantages of the invention. To better illustrate the scale and proportions of the drawings are not observed. Various embodiments of the invention application specifically described as not limited, they may be combined with each other.

the and drawings depicted the following :

Figure 1. Schematic representation of the banknote with the proposed translucent protective element.

Figure 2. The cross-section along the line II-II translucent protective element 1.

Figure 3. The curve of the real part of n (solid line) and imaginary part of k (dashed line) the complex refractive index N=n+ik in the visible spectral range: 3A - chromium, 3b for silver.

figure 4. Transmission spectra of symmetric structures absorber/dielectric/absorber when observing at a right angle (solid line) and angle (dotted line): 4a - chromium, 4b silver.

Figure 5. Design points chrominance bandwidth for normal system layers chrome/dielectric/chrome (dotted line) and the proposed system of layers of silver/dielectric/silver (solid line) in the coordinate system a*b*.

6. Design points chrominance bandwidth for the two proposed systems layers of silver/dielectric/silver for observing at right angles and inclined in the coordinate system a*b*.

7. Translucent protective element in accordance with an example embodiment of the invention in which the thin-film element combined with the embossed holographic structure.

Fig. Printing ink pigments with variable optical properties, the corresponding one of the examples of embodiment of the invention.

The invention singing is applied on the example of protective elements for banknotes. Figure 1 presents a schematic depiction of the banknote 10 with a through hole 14, is covered by the proposed translucent protective element 12. Figure 2 presents a schematic cross-section along the line II-II translucent protective element 12 of figure 1.

Translucent protective element 12 contains the motif of 16 figure 1 for the purpose of illustration is shown in the form of a motif 16 arms. Despite this, in other embodiments of the invention motif 16 may be any pattern, mark or code, in particular, a sequence of alphanumeric characters, for example, the designation of the nominal value of the banknote 10. While watching the translucent protective element in reflected light, in which the observer 22 is on the same side as the incident light 20, the motive 16 is seen as having a metallic luster essentially colorless pattern.

On the contrary, if the translucent protective element 12 is observed in transmitted light (item 24 for observation), for example, holding the banknote 10 facing the light source or against daylight, the observer, 24 sees the motive 16 in rich, saturated colors that change when you change the angle of the banknote 10. For example, when observed in transmitted light at a right angle motive 16 the observer sees in the lush green hue that when you tilt the banknote and the observation about adamem light angle leads to a rich blue color.

The perception of saturated and bright colors when observed in transmitted light protective element, which when observed in reflected light seems to be metal and colorless, contrary to the usual visual habits, so it attracts the attention of the observer and well remembered. Attracting attention and good memorability even more increased when the color change when you tilt the banknote 10, because of the rich colors of this color change is highly visible.

To create a named color effects translucent protective element 12, shown in figure 2, has a transparent polymer film 32, which is applied to a three-layer symmetric thin-film element 30 with an interference layer structure in the form of the desired motif 16. Thin-film element 30 consists of a first semi-transparent absorbing layer 34, which in this example embodiment of the invention is formed by a layer of silver of a thickness of 25 nm, a dielectric separation layer 36, which in this example is formed by a layer of SiO2the thickness of 270 nm, and the second semi-transparent absorbing layer 38, which in this example is formed of another layer of silver of a thickness of 25 nm.

The feature of the proposed structure of the layers is that in both translucent absorbing layers 34, 38 applied material, Ko is showing the real part n and imaginary part k of the complex refractive index N=n+ik, at least part of the visible spectrum, differ significantly, i.e. more than 5 times. On the contrary, in the case of materials commonly used in the absorbing layers of thin-film elements, such as chromium, Nickel or palladium, the values of the real part n and imaginary part k of the complex refractive index N always have the same order or magnitude.

These different properties figure 3 illustrates; each graph shows the curve of the real part n and imaginary part k of the complex refractive index N as a function of wavelength: figure 3(a) for chromium, figure 3(b) for silver. As can be seen from figure 3(a), in the case of chromium values n (continuous curve 40) and k (dashed curve 42) in the whole visible range of the spectrum have the same order and never differ by more than about 2.5 times. On the contrary, in the case of silver, as shown by the corresponding curves for n and k, as seen in figure 3(b), the imaginary part of k - dotted curve 46 in the visible spectral range of approximately 10-30 times the real part of n (continuous curve 44).

The authors of the present invention have found that this large difference values of n and k in the application of these materials as absorbing layer thin-film interference elements creates an unexpectedly strong chroma bandwidth. However, the reflection on things which actually remains colorless, and so the observer believes that it has a neutral color. This property is illustrated figure 4, which shows the transmission spectra of the symmetric structures of the absorber/dielectric/absorber, in each case, when observing at right angles and at an angle.

Figure 4(a) shows the transmittance of a conventional symmetrical patterns chrome/dielectric/chrome when observing at a right angle (continuous curve 50) and tilted (dotted curve 52). The thickness of the layers in this structure is preferably 300 nm for the dielectric layer and 8 nm layer of chromium. In both cases, the transmission spectrum is almost flat, so that the noise light color saturation has almost no and therefore looks grayish. Accordingly translucent protective elements based on thin-film element chrome/dielectric/chrome in optical relation barely visible.

In contrast, the spectra patterns silver/dielectric/silver as when observing at a right angle is a continuous curve 54, and when observed under the slope of the dotted line curve 56 - have distinct highs and 55, respectively, 57 and, thus, a strong chroma noise light. The thickness of the layers in this structure is preferably 300 nm for the dielectric layer and a 25 nm layer of silver.

When observing at a right angle curve 54 and maximum 55 located the Yong approximately at a wavelength of 560 nm, on the border between yellow and green. If the observer tilts the translucent protective element, the maximum bandwidth is shifted to the short wavelength region. When observed at an acute angle of 60° curve 56 and maximum 57 is located between 450 and 500 nm, in this area it shows intense blue color. Due to the rich colors and noticeable changes in color tone effect changes color depending on the angle of observation in transmitted light is to the observer a very clear and memorable.

A more accurate description of the color transmission in CIELAB color space can be given, indicating the saturation of the color in transmitted light. In CIELAB color space, each color is described by three coordinates L*,and* and b*, and the value L* represents brightness, and it can take values from 0 to 100. Axisand* describes the green or red color component, and the negative values ofand* indicate green while positive values are red. Axis b* describes the blue or yellow color component, and the negative values of b* indicate blue and positive values are yellow. The axis scale isand* axis and b* covers the range from -150 to +100 and -100 to +150, and, of course, not all combinations correspond to the perceived color.

To determine what, how juicy is the color, apply color saturation, which is set through the

Cab*=(a*)2+(b*)2

that is, the interval between the point color (and*, b*) and the origin (0,0). The greater the saturation, the more intense or seems juicy color. At zero color saturation depending on the brightness turns black, gray or white color.

Tone color is determined by the hue angle, which is determined as follows:

habo=arctanb*a*

Pale and juicy color of a particular color tone have the same angle hue but different saturation.

Figure 5 in the coordinate system ofa*b* schematically shows the design points chroma (and*, b*) bandwidth for normal system layers chrome/dielectric/chrome - dotted curve 60 of the proposed system layers silver/dielectric/silver - continuous curve 70. Each the I curve 60, 70 defines the color for a variety of thickness of dielectric layer SiO2in the range of d=200 nm at the starting point 62 or 72 to d=400 nm at the end point 64 or 74. The color of the missed light depends not only on the system layers, but also on the used light source. In the basis of calculation according to figure 5 put commonly used in Europe, the standard light source D65, corresponding to the color temperature of 6500 K.

In the diagram shown in figure 5, the color saturation ofCab*for each point on the chromaticity (a*, b*) defined by the above-mentioned ratio and the interval between the point color (a*, b*) and the origin 66.

As can be seen directly from figure 5, shown here in a range of thicknesses of the dielectric layer as the proposed system layers silver/dielectric/silver - curve 70, and a regular system of layers chrome/dielectric/chrome - curve 60 - covers all angles of the colour tone. However, the proposed and conventional system of layers differ from each other in terms of color saturation, i.e. the distance between the point color and origin of 66, which in the case of the proposed system layers - curve 70 in comparison with the conventional system layers curve 60 is very large.

In this case, as the rights of the lo, the color saturation of the proposed systems layers of silver/dielectric/silver even several times more color saturation in conventional systems layers chrome/dielectric/chrome. For example, when the transmittance in the green region of the spectrum (axisand*) the saturation of the system of layers of silver/dielectric/silver is approximatelyCab*=70, while the color saturation of the system layers chrome/dielectric/chrome with the same color tone is only approximatelyCab*=10. By passing in the yellow region of the spectrum (axis +b*) color saturation in the case of a system of layers of silver/dielectric/silver isCab*=33, while for a system of layers chrome/dielectric/chrome color saturation isCab*=4. The same ratios apply to the red axis +and*), blue (axis-b*) region, as well as in the case of mixed flowers, composed of the components red, blue, yellow and green.

The weighted average brightness L*, that is, the average transmittance of layer systems, weighted across the visible spectrum, comparable to the selected thicknesses of the silver layers (25 nm) and a layer of chromium (8 nm) and in each case is approximately 20% to 50%.

Further, the authors of the present invention unexpectedly found that, by choosing the appropriate thickness of the dielectric layer, can be manufactured as thin-film cells, which show high transmittance color and strong effect changes color depending on the angle, and thin-film elements, which, although they show a high chromaticity when passing, however, when the tilt of his color is almost not changed.

In the latter case can create understandable translucent protective elements, which, although they show a clear contrast between appearance when observed in incident light (metal and essentially colorless appearance) and transmitted light (intense, saturated colors), with the slope of the protective element of their color in transmitted light almost does not change.

Both variants of the invention illustrates 6, here in the coordinate system ofa*b* the calculated point chrominance bandwidth for the two proposed systems layers of silver/diale the trick/silver.

The first system layer contains two layers of silver of a thickness of 25 nm, between which as the dielectric layer is a layer of SiO2the thickness of 340 nm. In this embodiment, the point color transmission system layers for observing at right angles 82 lies in the red region, and when the observation angle 84 is in the yellow area. As can be seen from Fig.6, between two points 82, 84 color is a very large angle 86 hue, so that the first layer system when the slope shows a pronounced effect of color change from red to yellow, approximately on the line 80.

The second layer contains two layers of silver of a thickness of 25 nm, between which as the dielectric layer is a layer of SiO2thickness of 200 nm. In this embodiment, the point color transmission system layers as when observing at right angles 92, and when the observation angle 94 lies in the blue region. Between two points 92, 94 color is a very small angle 96 hue, so that when you tilt color perception from the second system layer remains almost unchanged. In this embodiment of the invention in the tilt system layer when observed in transmitted light point chromaticity does not change, but about on line 90 changing the saturation perceptible in transmitted light blue color, but the ordinary observer is hardly about the availability of attention to it.

7 illustrates a variant embodiment of the invention, in which the translucent protective element 100 contains the proposed thin-film element in combination with an embossed holographic structure.

To get this item first on the transparent film substrate 102 inflicted transparent embossed lacquer layer 104 containing the desired embossed holographic structure. Then after applying a primer layer (not shown) on the embossed structure has napisali thin-film element with an interference layer structure, for example, thin-film element 30 shown in figure 2 type. Thus, the effects of changes in the optical properties of the embossed holographic patterns can be combined with the above striking color effect when observed in transmitted light. For example, thin-film element in the window of the banknote may appear in the form of vygotovo or concave in the number or vygotovo or concave character.

In addition, the described thin-film elements can be used for the manufacture of printing inks containing pigments with variable optical properties. This printing ink is schematically shown in Fig. For the manufacture of printing inks 110 first film substrate is applied on large area thin-film element you who episunago type. Thin-film element mechanically scraped from the film substrate, and erased the scales if necessary, ground to the desired particle size. Then the resulting particles of the interference layer pigments 112 with variable optical properties is injected in a binder for printing inks 110. Thus, a simple way and without great expense can produce a large number of different colours with attractive from the point of view of color perception appearance.

1. Thin-film element with an interference layer structure for counterfeit securities, valuable documents and similar items containing at least two translucent absorbing layer and at least one dielectric spacer layer located between at least two absorbent layers, in which
each of the two absorbing layers consists of a material having a complex refractive index N, the real part n and imaginary part k of which at least part of the visible spectrum are different in 5 or more times
when observed in reflected light thin-film element has a metallic luster and are essentially neutral color, and when observed in transmitted light, he perceived color in transmitted light Templin CNY element has a color saturation of Cabdefined in CIELAB color space, more than 15, and the thin-film element for observing at right angles
- visible in transmitted light green and has a color saturationCabmore than 40, or
- visible in transmitted light yellow and has a color saturationCab> 20 or
in transmitted light visible red and has a color saturationCabmore than 30, or
- visible in transmitted light blue and has a color saturationCabmore than 30.

2. Thin-film element according to claim 1, characterized in that the two absorbing layers consist of different materials, and the real part n1 and imaginary part k1 of the material of one of the two absorbing layers different in 5 or more times, at least in part of the visible spectrum, and the real part n2 and the imaginary part k2 of the material drugog which of these two absorbent layers differ in 8 or more times, preferably 10 or more, particularly preferably 15 or more times.

3. Thin-film element according to claim 1, characterized in that the real part n and imaginary part k of the materials of both absorbing layers are different, at least in part of the visible spectrum, 8 or more, preferably 10 or more, particularly preferably 15 or more times.

4. Thin-film element according to claim 1, characterized in that the real part n and imaginary part k of the material of at least one of the two absorbing layers differ across the visible range of the spectrum in the 5 or more, 8 or more, 10 or more, or 15 or more times.

5. Thin-film element according to claim 1, characterized in that one of the absorbing layer or both absorbing layer made of silver.

6. Thin-film element according to claim 1, characterized in that one of the absorbing layer or both absorbing layer is made of aluminum.

7. Thin-film element according to claim 1, characterized in that the interference layered structure is a symmetrical three-layer structure consisting of the first absorber layer, a dielectric separation layer and the second absorbing layer.

8. Thin-film element according to claim 1, characterized in that the interest is ferentina layered structure is an asymmetric three-layer structure, consisting of the first absorbing layer of the first material, the dielectric separation layer and second absorbing layer from a second, different material.

9. Thin-film element according to claim 1, characterized in that the dielectric separation layer made of SiOxor MgF2.

10. Thin-film element according to claim 1, characterized in that the transmitted light thin-film element has a color saturation ofCabdefined in CIELAB color space, more than 20, preferably more than 25.

11. Thin-film element according to claim 1, characterized in that the thin-film element in transmitted light visible colour and shows the color-change effect.

12. Thin-film element according to claim 1, characterized in that the thin-film element in transmitted light visible color and the slope remains essentially sitosterolin, but with a modified color saturationCab.

13. Thin-film element according to claim 1, characterized in that the thin-film element is combined with a color filter, preferably with a color printed layer or a color sprayed layer.

14. Thin-film cell battery (included) is t 13, characterized in that the thin-film element and a color filter for a given observation direction is passed only in complementary spectra.

15. Thin-film element according to claim 1, characterized in that the thin-film element exists in the form of patterns, characters or a code.

16. Thin-film element according to claim 1, characterized in that the thin-film element combined with a relief structure, in particular, caused by the diffractive relief structure or microoptics relief structure.

17. Translucent protective element is protected against forgery of securities, valuable documents and similar objects containing the carrier and deposited on the carrier of the thin-film element according to any one of claims 1 to 16.

18. Translucent protective element according to 17, characterized in that the thin-film element supported on a carrier in the form of motive.

19. Translucent protective element according to 17, characterized in that its upper surface which is directed away from the carrier side, a thin-film element is equipped receptive to printing ink layer.

20. Pigments with variable optical properties for printing ink formed by thin film elements according to any one of items 1 to 16.

21. A data carrier with a thin-film element according to any one of claims 1 to 16, in which the thin-film element or prospec is that the protective element is in the transparent area with a window or over a transparent area with window, or in a through hole or a through hole of the carrier data.

22. A data carrier with a thin-film element according to any one of claims 1 to 16, in which the thin-film element or translucent protective element is embedded in the data carrier, in particular, the data carrier includes a paper substrate, in which an embedded thin-film element or translucent protective element.

23. The data carrier according to any one of p or 22, characterized in that the data carrier is a valuable document, such as a banknote, in particular, banknote paper, polymer banknote, the banknote with a multilayer film or identity.



 

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25 cl, 10 dwg

FIELD: printing.

SUBSTANCE: invention relates to information, identification cards and can be used for non-cash payments, such in credit bank transactions, in shops, as fare in public transport, etc. The chip card comprises a flat card of preferably rectangular shape, a microchip, a dielectric substrate on which a microchip is mounted, an antenna formed of an electrical conductor located along the periphery in the plane of the flat card and connected to the microchip. The antenna is made in the form of a frame of an electrical conductor and a dielectric layer located inside the electrical conductor to form a space inside the frame at least one partition is entered which is mounted in the space inside the frame to form the through openings in a transverse direction relative to the plane of the flat card. At least one end of the partition is connected to the frame dielectric layer, and the electrical conductor of the antenna is made of a noble metal.

EFFECT: proposed card enables to improve its service life, to improve performance specifications and reliability.

25 cl, 8 dwg

FIELD: printing.

SUBSTANCE: present invention relates to a sheet (1) with counterfeit protection suitable for gravure printing. The sheet comprises a coextrusion substrate (2) which is made of at least one polymeric material and has an inner layer (10) and at least one surface layer (11, 12). The inner layer (10) has pores (14), and the imprint (20) is attached to the sheet by the method of gravure printing, at that the height of the imprint relief formed with gravure printing exceeds 20 microns.

EFFECT: sheet with counterfeit protection can comprise different protective elements and optical means which enables to obtain the sheets with original appearance and a greater degree of protection.

46 cl, 11 dwg, 5 ex

FIELD: printing.

SUBSTANCE: invention relates to production of a security feature on a flat substrate. The particles forming cryptographic random pattern are applied to the substrate. On the substrate on the label site corresponding to the security feature and pretreated with the adhesive, flexible pieces of metal wire, such as copper wire, are poured, at that the pretreatment with adhesive is carried out by local application limited by the label site.

EFFECT: proposed invention provides creation of the simple and inexpensive security feature, easily detected and accurately processed by cryptographic method.

7 cl, 7 dwg

Security document // 2507075

FIELD: printing.

SUBSTANCE: security document comprises a protective device attached to the first part of the document, at that the protective device comprises an area of piezochromic material and a contact structure attached to the second part of the document, which is different than the first part, at that on the contact structure a relief is formed. The security document is made with the ability to provide pressing of the protective device against the contact structure. The piezochromic material is arranged so that when pressing of the protective device and the contact structure to each other in the piezochromic material an optical effect is created, at that the said optical effect displays the said contact structure relief. The said optical effect is caused by deformation of areas of the piezochromic material so that to correspond to the relief of the contact structure.

EFFECT: proposed security document provides enhancement of its protection against forgery, as well as ease of establishing of its authenticity.

22 cl, 6 dwg

FIELD: printing.

SUBSTANCE: invention relates to a method of manufacturing a security or valuable document, which includes the following steps: B) multilayer material is produced, which comprises a paper substrate, a masking layer provided on the paper substrate in the masking area, and marking substance modified by laser radiation, provided in the marked area, at that the marked area covers the masking area, and L) the multilayer material in the marked area is subjected to laser action in order to create the negative signs in the masking area simultaneously in register and discolored signs on unmasked areas of the marked area. At that before performing the step L) on the masking layer at least in the marked area the recesses are made in the form of patterns, signs or a code.

EFFECT: invention provides a high degree of protection against forgery.

25 cl, 22 dwg

FIELD: printing industry.

SUBSTANCE: invention describes an elongated protective element for papers, security papers and other documents. The protective element has longitudinal direction and transverse direction perpendicular to the longitudinal direction; with that, it includes a magnetic layer located on a substrate and having machine readable magnetic sections. The magnetic layer includes a set of frame magnetic elements that have machine readable magnetic sections and are located in longitudinal direction of the elongated protective element; with that, frame magnetic elements form closed magnetic frames located at some distance from each other; with that, each of the above frames is located around additional protective elements, thus containing the above elements inside itself.

EFFECT: proposed invention provides easy and accurate reading of magnetic sections of the protective element at its supply in any reading direction.

20 cl, 11 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to object formed by stencils of concealed image applied on valuable printed paper, said, bank notes, stock, etc, to be protected against counterfeit. Proposed object comprises, at least on a part of substrate surface, a concealed image area located along at least a part of said concealed image and background area located against the background of said concealed image area and said outline area. In concealed image area, multiple first elements of convex or concave profile are arranged at first spacing in first direction. In background area, multiple first elements are arranged at first spacing in first direction in phase that differ from that of first elements in said concealed image area. In outline area, multiple first elements are arranged at first spacing in first direction in phase that differ from that of first elements in said concealed image or background area that adjoins said outline area. In concealed image area, background area and outline area, multiple second elements feature coloring that differs from that of substrate and are located at second spacing in second direction.

EFFECT: better protection against counterfeit.

19 cl, 80 dwg, 11 ex

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

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: printed data carriers, advertising.

SUBSTANCE: method includes forming at least seven substrates and joining them in two groups, one of which consists of three substrates with applied information about red grape wines, other one - of four substrates with applied information about white grape wines.

EFFECT: higher efficiency.

1 cl

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: 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: 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: 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

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: 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

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

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