The method of marking objects
(57) Abstract:The invention is intended for the identification of works of art, objects of religious cult and industrial production. The method consists in the application code from a combination of numbers and letters or other characters are invisible in normal conditions cryptography using dye and entering it into the computer database. When this code is applied in the mode of ultraviolet radiation with subsequent keeping the account code in this radiation for a time sufficient for penetration of the dye into the object marking to a depth at least equal to the thickness of the surface layer. Moreover, the application code and extract its recording is carried out in UV rays with a wavelength of 240 to 400 nm, and a code entry withstand this radiation within 1-30 minutes technical result consists in the reliability of marking of objects and the ease of application and low cost equipment. 2 C.p. f-crystals, 1 table. The invention relates to the field of problems related to the identification of works of art, objects of religious cult and industrial production in order to prevent theft of cultural property, the known method of marking objects in particular securities, documents, money, works of art and objects of industrial production with the purpose of identifying them . The essence of this method lies in the fact that the object is irradiated with coherent pulsed radiation tunable laser and record the spectra reflected from the object radiation. Upon irradiation of the object part of the radiation is absorbed by the material, and some is reflected from the object. Reflected from the object, the radiation falls on a semi-transparent mirror and is directed to the spectral instrument with the recorder. The spectral device records the absorption spectra of this object. The object under examination is irradiated different wavelengths.Tunable laser tuned to the wavelength equal to the resonance, and generates pulses of coherent radiation, which is directed to an electro-optical modulator and then focused on the surface of the marked object. Modulator deflects the laser beam on the program on the computer, and thus forming the labels of the specified type.To read the signs marking, printed on the object, the latter is irradiated by the radiation source with a wavelength equal to the wavelength islicensed through opto-electronic unit, the associated direct and inverse relationships with your computer.When using this method for marking an object is not happening violations of its physico-chemical structures and any mechanical damage. The resulting labels are not destroyed when the physico-chemical effects on the surface of the object.However, to label objects this way the need for complex expensive equipment that can be used only in stationary conditions.In this regard, it is almost impossible to apply for mass marking of objects such as works of art, such as paintings and religious objects, particularly icons, especially in remote areas of the country.There is also known a method of marking objects, in particular vehicles, to prevent theft of the vehicle, the difficulties of criminal sale of stolen vehicles or parts thereof and difficulties of using fake documents .The essence of this method consists in the following.When marking the object, in particular of motor vehicles, put on its part of the coded combination of letters and numbers and enter it in to the od high pressure, and for application code to other parts of the object, such as metal, plastic, use a leave-in cryptographic dye, not visible in normal conditions. The composition of the dye kept secret in order to avoid attempts to pick up the solvent with which it was possible to remove the code. To find this code can only ultraviolet rays.The above-described method of marking an object, in particular of motor vehicles, is the closest analogous solution in its essence to the proposed method.The disadvantages of this method is the following.To use this method for marking objects, such as works of art, particularly paintings, rare manuscripts, religious items, etc. is almost impossible. Application code special solid powder under high pressure using, for example, sandblasting gun is only possible on glass objects.When applying the code in the daylight or electric light, invisible in normal conditions cryptography using indelible dye, available to the consumer, the latter is not enough penetrates deep into poverhnosti, which reduces the reliability of the identification object marking.Object of the invention is to provide such a method that would provide reliable marking of objects, including works of art, religious items, rare manuscripts, etc., when their mass identification and at the same time was technologically simple, not requiring additional costs for special equipment when marking and detection.This object is achieved due to the fact that in the proposed method of marking objects, which consists in applying the code of the combination of numbers and letters or other characters are invisible in normal conditions cryptography using dye and recording it in a computer data Bank, according to the invention, the code is applied in the mode of ultraviolet radiation with subsequent keeping the account code in this radiation for a time sufficient for penetration of the dye into the object marking to a depth at least equal to the thickness of the surface layer.Moreover, the application code and extract its recording is carried out in the ultraviolet radiation with a wavelength equal to 240-400 nm. This account code vigarny markers, or markers, or indelible dyes of any composition of domestic or foreign production, which when applied to the object marking code remains invisible under normal lighting.The application code is invisible in normal conditions cryptography using dye in the mode of ultraviolet radiation with subsequent keeping the account code in this radiation for 1-30 min promotes deeper penetration of the dye into the surface layer of the structure of object marking and thereby increases the stability of the dye in the physico-chemical effects on the surface of the marked object.The exposure time writing code in ultraviolet radiation depends on the material of the object marking, as well as the depth of the surface layer.The exposure time less than one minute does not provide performance improvement obtained when applying the code in a known manner, and the shutter speed more than 30 minutes is impractical, as it does not affect further improvement, which reached the optimal values for a given time interval, and only increases the cost of the marking process.Optimal results on the stability of the dye poluchenii code UV radiation with wavelengths less than 240 nm even without the influence of solvent luminescence dye is very weak, that dramatically reduces the reliability of marking and identification.The proposed method of marking objects, in particular works of art or objects of religious worship, is as follows.Are marked on the object cause of alphanumeric or other characters code is not visible under normal conditions cryptography using dye-mode irradiation with ultraviolet radiation with a wavelength equal to 240-400 nm. After applying the code continue irradiation his account the same radiation within 1-30 minutes While the composition of the dye kept secret in order to avoid attempts to pick up the solvent with which it was possible to remove the code. Discover coded only when exposed to ultraviolet radiation.Information encoded on the object and its owner is entered in the computer database, which is available at any time to determine the owner of the object, to make the exhibition to exhibition, to create files, directories, one directory of cultural values in the territory of the district, region, etc.Experimental investigations were carried out of the proposed method of marking on objects of religious cult in one of C the AI, is put codes were identified with the help of ultraviolet radiation. Marking well preserved, clearly visible on all sites and remains invisible under normal lighting. On the ground markings can damage the texture of the objects are not detected.In addition, in the laboratory studies have been conducted of the proposed method of labeling on different sites with subsequent impact on the code in different solvents. The results are shown in the table.To compare with the marking of the object on the prototype is not possible, because the code by a known method were applied to metal, plastic and other parts of the car using the dye, the composition of which is kept secret. Therefore, the comparison was carried out with the marking of different objects using a dye of a certain composition, which was applied to objects in the daylight or electric light, and the proposed method, i.e., the code was applied in the mode of ultraviolet radiation with subsequent keeping the account code in this radiation.The object identification was carried out on such factors as the safety of the surface layer and the readability of the code when exposed to UV radiation after physico-chemical attack mode, exposure to UV radiation followed by exposure writing code in this radiation has improved the stability of the dye due to its deeper penetration into the object structure.Thus, when exposed to the labeled surface layer objects, such as metal, plastic strong solvents (solvent 646, acetone) even when the disturbance of the surface layer to a depth exceeding the thickness of the surface layer, traces of code that can identify the object (see tab. gr. 5 and 6). While when marking the object under normal lighting after exposure to these solvents, traces of the code is available and identify the object almost impossible.When handling solvents marking printed on items such as book paper, canvas, wood, surface layer also is disturbed, however, UV radiation code well, you can distinguish (gr. 5, 6).After exposure to these objects with a mark in the ordinary illumination solvents such as solvent 646 and acetone, are only visible traces of code, for which identification is much harder and more costly.Thus, the results showed that the proposed method provides reliable marking of objects, including works of art, religious artifacts, rare books the manual technologically simple, does not require additional costs for special expensive equipment when marking and detection. In addition, the proposed method is designed to prevent theft of cultural property, makes it difficult for the resale and export abroad of stolen works of art. 1. The method of marking objects, which consists in applying a code of combination of numbers and letters or other characters are invisible in normal conditions cryptography using dye and entering it into the computer database, wherein the code is applied in the mode of ultraviolet radiation with subsequent keeping the account code in this radiation for a time sufficient for penetration of the dye into the object marking to a depth at least equal to the thickness of the surface layer.2. The method according to p. 1, characterized in that the application code and an excerpt of his writing carried out by ultraviolet radiation with a wavelength equal to 240 - 400 nm.3. The method according to p. 1, characterized in that withstand the account code in ultraviolet radiation for 1 to 30 minutes
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: protective members for visual controlling of authenticity of printing product such as security papers, banknotes, identification cards.
SUBSTANCE: protective member is formed as color layer applied to substrate and having color-free portions produced by exposing color layer to laser radiation for forming of image detected by visual control. Substrate surface is provided with relief, said image being formed on at least one side of relief after exposing to laser radiation falling at predetermined angle to relief surface. Protected printing product is equipped with protective member for visual controlling of paper authenticity.
EFFECT: increased extent of protecting printing products due to creation of protective member more complicated for counterfeit and using optical variable image.
7 cl, 5 dwg
FIELD: technological processes.
SUBSTANCE: digital array of data is created, which defines graphical configuration of partial plating, at that, using digital array, trajectory of tool motion is calculated, as well as control data for tool control, at that tool and single- or multi-layer film carcass are moved in relation to each other in accordance with tool motion trajectory. Tool that is controlled according to control data provides partial discrete de-metalation of metal layer by means of application of wipe-off mask for partial masking of single- or multi-layer film carcass. Foresaid mask is applied by spraying. Single- or multi-layer film carcass is further dried, provided with metal layer, and metal layer is partially removed by flushing method in area of wipe-off mask.
EFFECT: efficiency from production point of view, possibility to apply coating on different surfaces and exclusion of thermal or mechanical effect onto surface.
13 cl, 16 dwg
FIELD: technological processes.
SUBSTANCE: invention may be used in systems of laser marking and engraving in industry, for artistic applications, for authentication and personification of items and documents. Method for application of raster image consists in the fact that image of original is introduced into computer, image is transformed into raster array of numbers, working element coordinates are changed, working element is put in action, and dots are applied with its help onto surface of item. Working element used is represented by laser radiation. At the same time test image is previously downloaded into computer, and this image is applied onto surface of test sample, produced result is assessed, and laser radiation properties are accordingly adjusted in compliance with it. Multistage filtration of raster array of numbers is carried out, afterwards image of original is marked onto item.
EFFECT: high quality of applied image, increased resource of equipment, higher speed of image application, and also expansion of field of materials suitable for application of images.
FIELD: printing industry.
SUBSTANCE: invention is related to security paper, in particular to banknote, having individual mark, which is applied at least once on face and reverse side of security paper. At least one of individual identifiers applied on face and reverse side of security paper is applied onto security paper by contactless method. Besides application of individual identifiers on face and reverse side of security paper is carried out by means of single-sided treatment of security paper.
EFFECT: high degree of security paper protection, with minimum production costs.
32 cl, 16 dwg
FIELD: machine building.
SUBSTANCE: invention refers to method of laser labelling surface of metal or its alloy and can be implemented in machine building, jewellery industry and medicine. The method consists in preliminary plotting a calibration curve of dependence of depth of marking surface of a sample of specified metal or its alloy by means of effect of specific power of radiation incoming on surface. By means of a computer there is generated a protective digital code, where specific depth of marking and specific power of laser radiation correspond to each digit. A mark visible by a naked eye is applied on the marked surface of metal or its alloy by means of laser radiation transferred along marked surface; this mark corresponds to alpha-numeric or graphical information. A protective digital code in form of sequence of recesses invisible to a naked eye is applied on the produced surface visible to a naked eye; this code is marked by laser radiation of specific power chosen from the said calibrating curve.
EFFECT: high level of protection and simplified process.
8 cl, 5 dwg, 1 tbl, 1 ex
FIELD: physics, optics.
SUBSTANCE: device for transferring an image onto a wooden base has apparatus for receiving and/or creating an image. At least one source of a laser beam. Apparatus for moving the laser beam with rotation and/or translational movement of the laser beam relative the said wooden base or vice versa - for moving the wooden base relative the laser beam, as well as for focusing the laser beam onto the said base. At least one module for regulating radiation power of the laser beam. At least one module for controlling the said movement and focusing apparatus. Apparatus for converting information of the said image into an instruction for the said at least one regulation module and the said at least one control module. The said at least one regulation module regulates radiation power of the laser beam by directly changing pumping of the active substance and/or changing operation of the modulator located in the resonator of the source of the laser beam.
EFFECT: solution enables reproduction of images on a wooden base with an irregular shape with high accuracy and speed of processing, as well as high depth of transfer within the base.
22 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: proposed method may be used for making inscriptions and symbols on various materials, for examples, on light guides, light boards operated at high levels of illumination. Prior to applying coat of background material, contrast coat is applied that features minimum light reflection factor. Processed surface is divided along two coordinates into elementary sites to displace laser beam over said sites. All area of said sites is divided into area of sign outline and sign body area. On evaporating coats by laser radiation, the number of elementary sites is reduced to zero to form multistage sign profile comprising, at least, one step produced in contrast coat. Body sign area is kept unchanged.
EFFECT: higher readability and accuracy of signs, preservation of initial colours of materials.
3 cl, 3 dwg
SUBSTANCE: preliminary construction of calibration curve of dependence of etching depth of specimen surface of the specified metal or its alloy on parameters of incident laser radiation to surface is performed at monotonic increase in specific power of laser radiation from value of 0.1 J/cm2Ěs to the value at which molten drops are formed on etched surface. Then, spatial control of laser beam scanning on surface of metal or its alloy is performed at least as per one coordinate. Simultaneously with translational movement of laser beam there performed is its rotation with radius R. Radius R and angular rotation speed of laser beam is chosen considering the cut width and radius of laser beam.
EFFECT: improvement of the method.
5 cl, 3 dwg, 1 ex
FIELD: printing industry.
SUBSTANCE: invention relates to a method of manufacturing a protection property for the protective element, counterfeit-proof paper or data medium. The method of manufacturing a protection property for the protective element comprising a substrate which has at least one through hole and at least one marking in accurate register with this hole. The substrate, at least in the area of the manufactured marking is equipped with a marking substance modifiable by laser. During the same technological operation by exposure of laser radiation at high laser power at least one through hole is made in the substrate. By exposure of laser radiation at lower laser power at the marking area the marking substance is modified and thus at least one marking is created in accurate register with the through hole.
EFFECT: proposed protection property enhances the counterfeit protection level of the protective element.
23 cl, 5 dwg