Counterfeit-proof valuable document and method for determining its authenticity
FIELD: printing industry.
SUBSTANCE: invention relates to the field of protection of valuable documents against forgery and is designed for the instrument determining the authenticity of the protected printing products, such as all kinds of valuable documents. The valuable document has a marking comprising at least one inorganic compound with a crystal structure, doped with ions of rare earth elements, having the property of selective interaction with the radiation in the optical spectral range, characterised in that when exposed to radiation on it in a predetermined band of the optical spectrum the radiation of the compound only in this band of the spectrum has an excess over the temperature radiation with the final duration of 10-10 seconds and more.
EFFECT: improving the level of protection of the valuable document.
10 cl, 2 ex
The invention relates to the field of protection of valuable documents against forgery and is intended to be an instrument for determining the authenticity of the protected printing products, such as banknotes and forms of the securities and excise and stamps.
One of the most effective and technically feasible solutions for the control of authenticity of banknotes with hidden security features is to evaluate the properties of the re-emission of compounds included in the composition of the protective marking or the basis of banknotes and security documents. The advantages of this approach are the high performance, high level of security due to the possibility of creating a hidden protective elements, the non-contact control method.
Due to these advantages, hidden security features based on nonlinear optical properties of various inorganic compounds have found wide application in high-speed sorting of banknotes, combined with control of their authenticity.
The main requirement for this class of hidden machine-readable indication, intended only for control banknoten technique, is the reliability of the Desk and trudnodokazuemosti population using conventional methods, in particular the spectral and luminescent methods of analysis.<> Known securities (WO 81/03507 A1 1981) with mark - a sign of authenticity on the basis of the crystal structure with ions of rare-earth metals. The absorption of radiation and photoexcitation occurs in the visible and near IR region and a transparent region in the near IR region, where the connection only emits. In the same source of information is described a method of controlling authentication securities, characterized in that exciting and outgoing radiation are divided into several channels with a specific width of the bands, stimulated emission is measured and the resulting matrix of measured values is used as a criterion of authenticity. In the analysis of authentication features from the entire set of response parameters to consider only the intensity of the spectral bands.
The disadvantage of this solution is the lack of resistance to simulators, since only the range of stimulated emission of inorganic substances on the basis of rare earth elements is not uniquely characteristic of the data spectra are well studied and determined by the nature of the location of the energy levels in the atoms of rare-earth metals-activators. Therefore, a simulator with the same activator, even with differences in chemical composition, can have similar or completely similar to SP the CTE-induced radiation in a given spectral band.
Source WO 81/03510 A1, 1981 describes a security paper with authenticity in the form of fluorescent substances, they are showing the luminescence spectrum only in the invisible regions of the spectrum, the excitation is also invisible light, and the way subtle control authentication securities, characterized in that the security paper is exposed to excitation light in the invisible region of the spectrum, and that the emitted fluorescent light in the invisible region of the spectrum is analyzed detector device according to the wavelength, or the relaxation time.
This solution is based on the use of fluorescent compounds that emit light by Stokes ' law, and is known from other fields of technology, therefore, does not solve the problem of increasing the security level of a valuable document from forgery.
Source WO 2007/003531 A1, 11.01.2007 describes a valuable document with the protective trait-based phosphor for use in fraud-resistant documents, including the crystal lattice of the basic substance - oxysulfide rare-earth element is doped, at least two types of ions. The phosphor has anti-Stokes luminescence and luminescence according to Stokes ' law. This phosphor contains two components, which are specified oxysulfide yttrium, activated it is erbium, the holmium, and oxysulfide activated yttrium ytterbium, erbium in different proportions.
The disadvantages of this solution, on the one hand, should include use as a protective characteristic known fluorescent substances. Known from the prior art fluorescent substances are potentially available to the counterfeiter, and, in addition, the combination of their properties well known that facilitates search and selection of simulators. Since the luminescence properties of the protective trait described in the prototype, depend only on the nature of the alloying substance (ion rare earth element, REE), after the initial determination of the type used in protective marking REE, potential counterfeiter is quite easy to find imitators, and, as mentioned above, replicas may differ materially from authentic substances by chemical composition.
On the other hand, the use of fluorescent compounds emitting in the Stokes or anti-Stokes spectral regions relative to the excitation radiation with the development of analytical techniques rather lends itself well to the exploration and analysis.
The closest to the proposed invention is WO 81/03509 A1, 1981, which describes securities with fluorescent p is znakami authentication, the excitation of the luminescence occurs within a narrow range of wavelengths, and near the same area is luminescence. Describes how to determine the authenticity of the securities by photoexcitation radiation and observation of the characteristics of the excitation or luminescence, wherein the spectral excitation is produced near the luminescence radiation, and the method, characterized in that in the spectral region close to the region of excitation, the observed attenuation of the luminescence radiation.
This solution assumes control of the nature of the decay of the luminescence, which is a significant difference from the other considered solutions. However, the task of improving the security of the valuable document in comparison with the proposed method is not solved in full for three main reasons:
1. In this technical solution is applied luminescent substances known from the prior art, which significantly simplifies the decoding of the sign, and then search and selection of simulators.
2. The proposed solution agrees closely spaced, but not matching band emission/excitation. Thus we assume that the spectral resolution of technical solutions is determined by the spectral width of the semiconductor laser used as the East is of cnica radiation (that is, YES, from 5 to 30 nm depending on the spectral range).
3. Not specified no in the emission spectrum of the additional connection of Stokes or anti-Stokes bands, recorded available analytical methods, and which can determine the fact of his presence in a protective marking, and also does not specify the absence in the spectrum of the excitation connection of additional strips lying outside the core area of the Desk, when exposed to that substance you can discover available analytical methods, and to detect the fact of his presence in a protective marking by the presence of induced Stokes and/or anti-Stokes radiation.
The task and the technical result of the proposed invention is to increase the level of protection of the valuable document from tampering through the use of inorganic compounds unknown in the prior art and having properties of providing reliable and unambiguous identification of the valuable document, but which is the hard-to-detect standard analytical methods of spectral and fluorescent analysis.
The task and the technical result is achieved by the fact that valuable documents, such as banknotes, stamps, postage stamp, passport, travel document, driver's license, oseverenie personality, valuable paper, plastic card or similar document that is protected from tampering, containing on its surface and/or in its composition sneaky protective marking containing at least one inorganic fluorescent compound with a crystalline structure doped with ions of rare earth elements, which has the property of selective interaction with radiation in the optical range of the spectrum, characterized by the fact that when exposed to radiation of a specified band of the optical spectrum of the radiation-only connections in the same spectrum band has a surplus of over temperature by radiation with a finite duration 10-10seconds and more.
As such inorganic compounds may be used, for example, compounds corresponding to the following empirical formula:
where LnI- Y and/or La, Gd,
LnII- Eu, or Tb, or Dy, or Sm, or Yb, or Er, or Ho, or Nd, or Pr, or Tm,
Me - Al and/or Ga,
or other compounds having the property of selective absorption of optical radiation in only one spectral band.
In addition, valuable document can be characterized by the fact that the protective marking is made offset of str is obom printing.
The task and the technical result is achieved also by using a unique method of determining the authenticity of a valuable document with all of the above inherent features. The method includes the detection of hidden protective marking on the valuable document through the measurement and subsequent analysis of the intensity and duration of the excess radiation in a given spectral band.
It should be emphasized that these measurements and their analysis was first conducted to achieve the technical result regarding labeling using the new, not known from the prior art compounds.
As the present invention, unlike the known technical solutions based on the use of inorganic compounds, not previously known from the prior art, therefore, the sum of the parameters of luminescence that characterize this type of luminescent substances are not found in the known technical solutions and cannot be imitated known from the prior art solutions, either individually or in any combination.
Use when identifying protective marking measurements and subsequent analysis of the intensity and duration of the excess radiation in a given spectral band allows you to use unknown in the prior art, reorgani the definition connection selection and research which cause difficulties for the potential of counterfeiters.
Valuable document containing a hidden protective marking made colorless ink offset printing method and including 10% inorganic compounds Y1,689Ce0,001Tmfor 0.3Al0,01O2S.
Was determined characteristics marking compounds, which are the basis of the method of determining the authenticity of the valuable document according to which the detection of hidden protective marking on the valuable document assumes by measurement and subsequent analysis of excess radiation in the spectral band width of 20 nm at a wavelength of 810 nm in the absence of excess radiation in any other bands of the optical spectrum of wavelengths, and in the absence of excessive radiation when exposed to the substance stimulating radiation in the range from 300 to 800 nm and 820 to 2500 nm.
Presents inorganic compound has the following set of parameters.
1. No excess radiation in the whole range of the spectrum, in addition to a specified band of 810 nm with a width of 20 nm.
2. The kinetics of decay of excess radiation is characterized by a time constant of 2.0 μs.
3. The lack of visual symptoms in any form of optical excitation in the visible range 400-700 nm.Example 2.
Valuable document containing a hidden protective marking, offset printing and including 5% inorganic compounds Y1,834Ce0,001Erof 0.15Al0,015O3.
Was determined characteristics marking compounds, which are the basis of the method of determining the authenticity of the valuable document according to which the detection of hidden protective marking on the valuable document assumes by measurement and subsequent analysis of excess radiation in the spectral band width of 30 nm at a wavelength of 1550 nm in the absence of excess radiation in any other bands of the optical spectrum of wavelengths, and in the absence of excessive radiation when exposed to the substance stimulating radiation in the range from 300 to 1535 nm and 1565 to 2500 nm.
Presents inorganic compound has the following set of parameters:
1. No excess radiation in the whole range of the spectrum, in addition to a specified band of 1550 nm with a width of 30 nm.
2. The kinetics of decay of excess radiation is characterized by a time constant of 1500 μs.
3. The lack of visual symptoms in any form of optical excitation in the visible range 400-700 nm.
Thus, it is obvious that the technical result is achieved by introducing a protective marking valuable what about the document inorganic luminescent compounds with a crystalline structure alloy ions of rare earth elements, and having the property of selective interaction with radiation in the optical range of the spectrum, characterized by the fact that when exposed to radiation of a specified band of the optical spectrum of the radiation-only connections in the same spectrum band has a surplus of over temperature by radiation with a finite duration 10-10seconds and more.
1. A valuable document that is protected from tampering, containing on its surface and/or in its composition sneaky protective marking comprising at least one inorganic compound with a crystalline structure doped with ions of rare earth elements having the property of selective interaction with radiation in the optical range of the spectrum, characterized in that when exposed to radiation of a specified band of the optical spectrum of the radiation of the connection in only one spectral band of the spectrum has a surplus of over temperature by radiation with a finite duration 10-10seconds and more.
2. Valuable document according to claim 1, characterized in that it is a bill, documentary stamps, postage stamp, passport, travel documents, driving license, identity card, a security paper, a plastic card.
3. Valuable document according to any one of claims 1 to 2, characterized in that the AC is este inorganic compounds used as a compound
corresponding to the following empirical formula:
where LnI-Y and/or La, Gd,
LnII-Eu, or Tb, or Dy, or Sm, or Yb, or Er, or Ho, or Nd, or Pr, or Tm,
Me-Al and/or Ga,
4. Valuable document according to any one of claims 1 to 3, characterized in that the inorganic compound protective marking has the property of selective interaction with radiation in the optical range of the spectrum in the range from 0.1 μm to 10 μm, preferably in the range from 0.4 µm to 2.5 µm.
5. Valuable document according to claim 4, characterized in that the inorganic compound is a particle size in the range from 0.01 microns to 100 microns.
6. Valuable document according to claim 5, characterized in that the width of the spectral band of the interaction of inorganic compounds protective marking with optical radiation is from 1 nm to 50 nm.
7. Valuable document according to any one of pp.5, 6, characterized in that the protective marking is made in the printing method, preferably the offset printing method.
8. Valuable document according to any one of pp.5, 6, characterized in that the protective marking embedded in a mass of paper or plastic, or embedded in the surface layer of paper or plastic, or applied in the composition of the adhesive layer between the inner layer is logolounge document.
9. Valuable document according to claim 8, characterized in that the protective marking is made in the form of geometric shapes, guilloche elements, graphics and symbols, forms the encoding or represents any combination of all the above.
10. The method of determining the authenticity of the valuable document according to any one of paragraphs. 1-9, characterized in that conduct the detection of hidden protective marking on the valuable document by irradiating the protective marking of radiation in a given spectral band and the subsequent measurement and analysis of the intensity and duration of the excess emission in the same spectral band.
SUBSTANCE: electromagnetic radiation generator is made in form of a linear array consisting of similar light-emitting diodes 19, having a length which is not shorter than the width of the detected area. A linear photodetector array also consists of similar photodiodes 20, each placed opposite the light-emitting diodes. Adjacent photodiodes 20 of the photodetector are switched in pairs with the possibility of detecting the analysed object simultaneously on all formed channels. Values of given characteristic parameters of the generated luminescence radiation, which corresponds to areas of the surface, i.e., response detected by the photodetector, are the damping characteristic of the generated luminescence radiation and the topology of arrangement of security marks.
EFFECT: high accuracy of authenticating and identifying security papers and documents, compact and simple device.
4 cl, 16 dwg
FIELD: instrument making.
SUBSTANCE: method consists in recording, reading and reproduction of information from memory cards 2 of different standards and further use of the same information during electronic interaction with the corresponding firmware. Peculiar features consist in the fact that an electronic device of card-reader 1 is equipped with an optoelectronic sensor functionally being a device for memory card 2 authenticity identification by means of detection of at least one protective mark made on it. For that purpose, the section of memory card 2, which has the protective mark, is arranged in sensor field of view. Besides, the above recording, reading and reproduction of information is performed after the above sensor registers positive result of authenticity identification, which is obtained by means of the corresponding processing of data file formed during detection. Card-reader 1 is provided for implementation of the method, the electronic device of which is equipped with an optoelectronic detection sensor, and one of possible versions of certain design of the above sensor is provided.
EFFECT: improving quick action and accuracy of reading.
3 cl, 6 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to gonioluminiscent material. Protective element comprises first element and second element covering at least partially said first element. Second element faces the of protective element observation side. First element comprises first luminescent means while second element comprises optical interference structure with transmissivity and/or reflectivity dependent upon orientation in isolated wavelength band. Said first and second elements are matched so that observed luminescent light changes at excitation of luminescence of the first luminescent means depending upon observation orientation and/or excitation light incidence direction. In said wavelength band at straightly one orientation or in limited orientation range at least one interference structure varies its transmissivity or reflectivity. Note here that isolated spectral band matches with wavelength band wherein first luminescent means can be excited by irradiation by excitation light.
EFFECT: protective element with high degree of protection against counterfeit.
22 cl, 10 dwg
FIELD: information technology.
SUBSTANCE: device (1) includes a light source (14, 51, 52, 68) for exciting luminescent radiation and a luminescence sensor (12) for detecting luminescent radiation from the valuable document (BN) with spectral resolution; the light source (14, 51, 52, 68) creates an illuminated section (35) on the valuable document (BN) being transported past the luminescence sensor (12) in the direction (T) of transportation, said section being stretched in the direction (T) of transportation, and the luminescence sensor (12) has a detector unit (21) designed to measure luminescent radiation with spectral resolution, and a detector unit (27) designed to measure luminescent radiation without spectral resolution.
EFFECT: high quality of verification by enlarging the verification section in case of weak luminescence.
31 cl, 13 dwg
FIELD: information technologies.
SUBSTANCE: method includes sending a document past an image signal generator with simultaneous serial illumination of the document using several types of illumination, at the same time for each line scanned by the image signal generator a pre-specified type of illumination is used, which makes it possible to generate a document image with alternation of several types of lines. Such image with alternation of several types of lines is exposed to multi-dimensional transformation function, as a result a combined measurement is produced, which is then projected to an empirically determined vector of suitability, in order to produce a scalar value of suitability for this document. This value is compared to the empirically established value of suitability for identification of whether this document is suitable enough to stay in circulation or it shall be removed from circulation and destroyed.
EFFECT: increased accuracy of document suitability inspection.
15 cl, 10 dwg
SUBSTANCE: disclosed is a document photosensor which comprises upper and lower measuring assemblies (1 and 2) lying on opposite sides of a passageway (55) along which a document (50) is transported. The upper measuring assembly (1) comprises an upper substrate (11), an upper light-emitting diode (LED) chip (21) and an upper photodiode chip (37) mounted on the surface of the upper substrate (11). The lower measuring assembly (2) comprises a lower substrate (12), a lower LED chip (31) and a lower photodiode chip (38) mounted on the surface of the lower substrate (12). These chips (21, 37, 31 and 38) are precisely located on the upper and lower substrates (11 and 12) so that the photodiode chips (37 and 38) accurately detect light emitted by the LED chips (21 and 31) and penetrates through a particular point on the document (50), which improves bill validation.
EFFECT: high accuracy of detecting light-emitting elements.
15 cl, 23 dwg
SUBSTANCE: method involves providing an array of particles in a curable binding composition; curing a first portion of the binding composition with laser radiation with manifestation of a first optical property; changing the distance between particles in another portion of the composition; and curing the other portion of the binding composition with manifestation of another optical property. Multiple-colour images are also obtained in superimposed crystalline colloidal structures.
EFFECT: obtaining a high-precision image in crystalline colloidal structures.
21 cl, 5 dwg 4 ex
SUBSTANCE: invention discloses a counterfeit-proof document, in which at least on one area, which is visible from the side surface, at least two different paints are applied. The said paints along the marked direction on the area have concentration curves differing from each other, so that the ratio (R(x)) of the concentrations of at least two different paints varies on the area depending on the location along the marked direction, with at least two different paints are fluorescent paints. The concentration curves are chosen so that at the excitation of fluorescence the area which leads to the appearance of the marked colour print is distinguishable; and at least two different paints have different durability. In addition, the concentration curves and the area size along the marked direction are chosen so that, after manufacturing after a preliminary determined period of validity a distinguishable shift is formed which leads to the appearance of colour print of the area.
EFFECT: invention provides increased protection against forgery of the document, and the simplicity of checking the attribute of authenticity.
35 cl, 12 dwg, 3 ex
SUBSTANCE: in the application a valuable and/or counterfeit-proof document is described, with a self-scan protective element comprising luminophore. In different areas of the surface of valuable and/or counterfeit-proof document at least two different luminophores are located, which differ in wavelength of the luminescent emission emitted by them and which form an image. Moreover, each wavelength of the luminescent emission corresponds to one sign, and each area of the surface of valuable and/or counterfeit-proof document corresponds to a position of the sign. As a result, due to the choice of different luminophores in combination with their place of location the first self-scan sequence of signs is formed.
EFFECT: invention provides a high degree of protection against forgery of the document, and the simplicity of its manufacturing.
15 cl, 4 dwg
SUBSTANCE: invention relates to counterfeit-proof printing products and is related to polymer multilayer protective element having an optically variable effect. It is designed as a structure in which at least one layer contains micro-raster relief structure, and the second layer comprises a printing raster of micro-images located at the nodes of a printing raster. The spatial period of the printing raster is defined by spatial period of the micro-raster relief structure. Elements of the micro-raster relief structure are made in the form of mirror focusing elements, which are micro-mirrors, embossed micro-knobs on the lacquer layer and phase Fresnel zone plates that bear the reflective or semitransparent reflective thin layer of metal located inside the element in nodes of relief raster. Location and orientation of a raster of mirror focusing elements are chosen so as to conform to the location and orientation of the raster of micro-images formed on the upper surface of the polymer film, so that when looking at the protective element the enlarged floating images of elements of printing raster and enlarged floating images of shadows of elements of printing raster are observed.
EFFECT: invention provides an improvement of protection of valuable documents.
4 cl, 9 dwg, 3 ex
SUBSTANCE: invention can be used to protect the product from counterfeiting. The method of forming a plurality of inorganic marking pigment scales comprises creation of a polymeric substrate for application of a removable coating, application of a removable coating on the polymeric substrate. After that, the embossing on the first part of the polymer substrate of the pattern of the first frame and the embossing on the second part of the pattern substrate of the second frame, different from the first pattern frame, is carried out before or after application of the removable coating on the polymeric substrate. The removable coating is removed from the polymer substrate and is processed to the mixture of scales that comprises a first plurality of scales substantially uniform in shape with the first frame pattern. To produce multiple of moulded inorganic marking pigment scales, the frame pattern of selected shape and character in the frame is applied to the polymeric substrate. Then at least one layer of an inorganic thin film is precipitated on the polymeric substrate and the layer of inorganic thin mixture is converted into a scales mixture, at that the scales mixture comprises scales having a selected shape and character.
EFFECT: invention enables to obtain concealed scales, which when added to the ink or paint are not easily detectable when random observing under visible light and which can only be detected using ultraviolet or infrared radiation.
24 cl, 10 dwg
SUBSTANCE: invention relates to a security element, in particular to security labels or adhesive tapes. The security element comprises the following layers: a) a substrate-carrier; b) a reflecting layer or layer with a high refractive index; c) a partial separation layer of varnish; d) the adhesive intermediate coating applied to the entire surface; e) the adhesive layer applied on the entire surface where the adhesive coating d) is in those places where there is no separation layer of varnish c), adhesion of the layer b) with the substrate-carrier a) is disturbed, and in case of attempt to manipulate due to separation of the layer b) it is separated from the substrate-carrier a) in those areas where there is no separation layer of varnish c).
EFFECT: proposed security element provides ease of detection of manipulation with it.
FIELD: information technology.
SUBSTANCE: data medium has a substrate having a portion with a distinctive feature formed by a family of curves which includes a plurality of arched and/or diverging slit lines. Inside the portion with a distinctive feature there is an identification mark which is configured for visual or computer recognition and is a pattern, symbols or code. Said identification mark is formed by a portion of the substrate which does not have slits and has a family of marking curves, which includes a plurality of marking lines connected to the slit lines outside the identification mark.
EFFECT: high degree of counterfeit protection.
22 cl, 13 dwg
FIELD: physics, computation hardware.
SUBSTANCE: invention relates to protection against counterfeit, particularly, to electronic and/or optical unit of the device and to method of its configuration. It comprises electronic and/or optical flat element secured to plastic body. Said element has multiple holes for plastic body material to pass there through to facilitate mechanical attachment and retention of the element built in the body. Said multiple holes serves to define the protective and/or anti-counterfeit data. Said body represents a homogenous body.
EFFECT: irreversible embedding of metal and plastic films in various thermoplastics.
33 cl, 26 dwg
FIELD: process engineering.
SUBSTANCE: set of inventions relates to production of protection element and to retransfer film. Said retransfer film gas base layer with the first bearing film and one-layer or sandwich layer. First adhesive layer is applied on the first bearing film surface opposite the surface facing the decorative layer while second bearing film is applied so that first adhesive layer is located between first and second bearing films. First adhesive layer in activated in the first area that covers, at least partially, one first section of base film while first adhesive layer is not activated, nor created, created only partially or deactivated in second area adjacent to said area. Then, first bearing film is cut, at least partially, along boundary line defining at least first area and separating at least one first section from second area of base film. Second part of base film including second section is removed from second bearing film. Note here that base film is adhered, at least one in one first section to second bearing film by activated first adhesive layer. Note that said first part comprises at least one first section and stays at second bearing film.
EFFECT: better protection against counterfeit.
52 cl, 10 dwg
FIELD: physics, optics.
SUBSTANCE: invention relates to a film (1), designed to protect and decorate articles. The film includes at least one transparent replicating layer (2), having a diffracting relief structure (3) and a reflecting layer. The reflecting layer is formed from at least one layer (4) of pigmented lacquer, which is placed in the immediate vicinity of the diffracting relief structure (3). Refraction indices n1 of at least one lacquer layer (4) and n2 of the replicating layer (2) assume values whose difference is in the range from 0.05 to 0.7. Luminosity L* of at least one lacquer layer (4) is in the range from 0 to 90. Disclosed also is a method of producing said film and use thereof to coat car number plates and other articles to protect from forgery, coupled with an optically variable decorative effect.
EFFECT: improved properties of the film.
21 cl, 6 dwg
FIELD: textiles, paper.
SUBSTANCE: laminated article on paper or polymer substrate with optically variable structure comprises a coating in the form of printing raster and a three-dimensional raster. The coating is formed on one side of the substrate, and the three-dimensional raster is applied to the other side of the substrate. The field of printing or the three-dimensional raster is divided into two or more sectors which are displaced relative to each other. Each sector has a different colour so that when changing the view angle the colour of the sectors on the image changes. The three-dimensional raster is made in the form of elements with a symmetrical and/or asymmetrical profile to form a relief on both sides of the substrate and is positioned relative to the printing raster so that the three-dimensional raster is at least partially located above the printing raster. The width of the printing raster lines is from 50 to 200 microns, the width of the three-dimensional raster lines is 100 to 600 microns, the angle between the elements of the printing and the three-dimensional rasters is from 0° to 10°, at that they form a moire image, which when observing the data medium under the right angle is concealed, and when observing the data medium at an acute angle becomes visible.
EFFECT: improving security of articles, increased manufacturability and reducing the cost of the security element due to reduction of runs in the printing machine.
15 cl, 18 dwg, 4 ex
FIELD: physics, optics.
SUBSTANCE: diffraction structure comprises a plurality of channels assembled to generate a first diffraction optical effect. Each channel is formed from a plurality of scattering and/or diffraction channel elements, each aligned to provide a second scattering and/or diffraction optical effect to form a micro- or macro-distinguishable graphic feature. The method of creating a diffraction surface relief structure involves forming a plurality of scattering and/or diffraction channel elements with alignment, which serves to form a plurality of channels that are assembled to generate a first diffraction optical effect. Each of the plurality of channel elements is assembled to provide a second scattering and/or diffraction optical effect to form a micro- or macro-distinguishable graphic feature.
EFFECT: creating a unique, highly secure feature which is difficult to imitate and can be combined with any optically variable features.
50 cl, 18 dwg
SUBSTANCE: invention relates to the field of manufacturing security documents. The protected structure (1) comprises: a fibrous layer (2a, 2b); substrate (3) with a translucent area; a watermark or its imitation (8a, 8b) applied on the fibrous layer (2a, 2b) and overlapped in the plan at least partially with the translucent area of the substrate, so that in this area the watermark or its imitation (8a, 8b) is visible against the light through the protected structure (1) only from the side of the fibrous layer; and the microelectronic device (4, 10) providing a contact or remote communication.
EFFECT: protection against counterfeiting and erasures.
44 cl, 22 dwg
FIELD: textile, paper.
SUBSTANCE: polymer sandwich element for paper, which has optically variable effect, is made in the form of a sandwich polymer structure containing at least one layer with microraster relief structure. It has an additional layer with printed or embossed raster of microimages, which is spatially combined with microraster relief structure. Microraster structure is made in the form of raster of spherical transparent polymer lenses or prisms or raster of Fresnel diffraction polymer structures. Printed microimages located in nodes of the printed raster consist of elements of different colours with diametre of 20-100 mcm, which are located at the distance of 40-400 mcm from each other. Mutual location of colourful elements in nodes of the printed raster is discernible in different places of a representational printed field. Inside the defined areas the mutual location of colourful elements differs from mutual location of elements outside the defined areas.
EFFECT: invention allows increasing protection degree of products with protective elements without any increase in prime cost of their production process.
3 cl, 4 dwg, 1 ex
SUBSTANCE: invention relates to the field of protection of valuable documents against forgery. The valuable document comprises on its surface an invisible protective marking applied on the elongated section along the long side of the document, which is intended for the instrument reading. The protective marking has the property of selective absorption of the radiation in the range optical spectrum from 0.76 mcm to 10 mcm. The marking is wholly or partially located in the area of additional masking marking. The material of the latter has the property of re-radiation when exposed of the exciting radiation of the same spectral composition as the material of the protective marking, but is characterised with magnitude of afterglow time. The method of determining the authenticity of the valuable document comprises revealing the hidden security marking on the valuable document. The revealing of marking is carried out by registration of afterglow of its material after removal of the exciting radiation and/or by registration of the diffuse reflection of the material in the optical range of wavelengths from 0.76 mcm to 10 mcm. Violation of the predetermined information indicates full or partial forgery.
EFFECT: increase in the level of protection of the valuable document against forgery.
13 cl, 4 ex