RU37562U1 - RELIEF DETECTOR, PREFERREDLY FOR MONEY DOCUMENTS - Google Patents

Abstract

1. The relief detector, mainly for monetary documents, including a base and means for forming a relief image, characterized in that the means for forming a relief image is made in the form of a plate of transparent material, on one side of which a layer of transparent elastomer and a reflective coating are successively applied, made in the form of a thin layer of metal. 2. The detector according to claim 1, characterized in that the base and the means for forming a relief image are made in the form of two elements that are not interconnected. The detector according to claim 1, characterized in that the base and the means for forming a relief image are made in the form of two plates located one above the other and interconnected with the possibility of combining their facing each other surfaces when applied, while one of the plates is made of a transparent material, and a layer of a transparent elastomer and a reflective coating are applied to its side facing another plate. 4. The detector according to claim 3, characterized in that the two plates are formed by the leaves of a bent strip made of a transparent material.

Description

Terrain detector, mainly for cash

of documents

The utility model relates to the field of document authentication using non-destructive registration (detection) of the relief present on their surfaces, for example, metallographic printing, watermarks. It can also be used in forensics for fingerprinting. It is known that one of the signs of metallographic printing is the presence of a relief associated with the features of the method. The formation of this relief is impossible by conventional printing, analog or

digital printing. Therefore, its registration is the most important sorting verification of the authenticity of monetary documents, for example, banknotes, valuable

papers, certificates, etc. Registration of the relief of a papillary pattern (fingerprints) is also widely used in forensics, in access control systems, etc.

To assess the novelty and technical level of the claimed solution, we consider a number of technical means known to the applicant for a similar purpose, characterized by a combination of features similar to the claimed utility model.

Known devices for recording terrain, for example, (chat chats1 | s of fingers based on the application of the method of impaired total internal reflection (see, for example, RF patent No. 2022524, АВВ 5/117, application No. 2000114020, G06K 9/00). the relief image in such devices contains a prism that is directed at an angle corresponding to or slightly larger than the angle of total internal reflection.If a relief structure, for example, a finger, is brought into contact with the surface of the prism, then at the contact points of the finger there th internal reflection occurs and the fingerprint image, which can be read visually or digital device.

200315 I

MKI: G07D 7/00, А61В 5/117, G06K 9/00

i.si; :;

The disadvantage of registration devices of relief structures based on the application of the method of disturbed total internal reflection is the need to build a complex optical registration scheme. This complexity is due to the fact that the optical paths from different points of the recorded surface are so different that to eliminate distortions you have to create special optical circuits (see, for example, RF patent No. 2185096, АВВ 5/117).

A known relief detector, mainly for monetary documents, containing a housing and means for forming a relief image, see USSR patent No. 1367882, G07D 7/00. The housing having a base-screen and an entrance slit is divided into two compartments with an opaque screen. The upper part of the housing is equipped with a translucent window located above one of the compartments of the housing. The means for forming a relief image includes a light source installed in each of the compartments, equipped with a light guide screen, sources of white and ultraviolet or fluorescent light. In this case, the white light source is located under the translucent window with the possibility of creating flood light on the base-screen with an angle of incidence from 0 ° to preferably 15 ° and penetrating light on the translucent window, in another compartment of the housing the source of ultraviolet or fluorescent light is located with the possibility of creating incident light on the base screen.

According to the greatest number of similar features and the result achieved when using this technical solution is selected as a prototype of the claimed utility model.

The presence of several control zones of various kinds of fakes (chemical, mechanical, etc.), as well as several different light sources that ensure the visibility (visual perception) of these fakes, each of which requires a certain adjustment during operation, determine the complexity of the design and operation as means for image formation, and the well-known relief detector in general.

This utility model is aimed at solving the problem of simplifying the design and operation of a relief detector by eliminating the need to use complex optical elements in it, as well as providing direct visual registration of the studied relief.

The essence of the claimed utility model is expressed in the following set of essential features, sufficient to achieve the above, provided by the utility model of the technical result.

The relief detector, mainly for monetary documents, including a base and means for forming a relief image, is characterized by the fact that the tool for forming a relief image is made in the form of a plate of transparent material, on one side of which a layer of transparent elastomer and a reflective coating are successively applied, made in the form of a thin layer of metal.

This is the totality of essential features that provides a technical result in all cases to which the requested amount of legal protection applies.

In addition, the claimed solution has a number of features that characterize the utility model in particular cases of its implementation, namely:

- the base and the means for forming a relief image can be made in the form of two, not interconnected elements,

-the base and the means for forming a relief image can be made in the form of two plates located one above the other and interconnected with the possibility of combining their facing each other surfaces when applied, while one of the plates is made of a transparent material, and facing another plate has a layer of transparent elastomer and a reflective coating on its side,

- in the above embodiment, two plates can be formed by the leaves of a bent strip made of a transparent material.

The applicant has not identified sources containing information on technical solutions whose totality of features coincide with the totality of the features of the claimed utility model, which allows us to conclude that it meets the novelty criterion.

Due to the implementation of the distinguishing features of the utility model (together with the features indicated in the restrictive part of the formula), important new properties of the object are achieved: if between the base of the detector and

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means for forming an image to place a monetary document containing a metallographic print and / or watermark, then under the action of the pressure applied to the detector the elastomer perceives a deformation that reproduces the relief of the surface of the document. In this case, the deformation is repeated by a specular reflective coating made of a thin layer of metal, and the relief formed on a smooth mirror surface becomes visible to the naked eye.

The essence of the utility model is illustrated by graphic materials, where in FIG. 1 shows a General view of the claimed device, and FIG. 2 explains its operation.

The relief detector includes a base in the form of a plate 1 and an image forming means, which is a plate 2, on the side facing the plate 1 of which a layer of transparent elastomer 3 is successively applied and a reflective coating in the form of a thin (0.2 μm) layer of aluminum 4 forming an even mirror surface. Plates 1 and 2 are made of polymethylmethaphylate with a thickness of 2 μm and a size of (100x30) mm. In this particular example, for convenience and operation, the plates 1 and 2 are interconnected by a bolt 5 so that when superimposed, their facing surfaces are aligned. In the simplest case, the plates 1 and 2 can be formed by the leaves of a single bent strip made of a transparent material. In the process of research, money document 6 is placed between plates 1 and 2.

The device operates as follows.

The banknote 6, containing a metallographic print and / or watermark, is placed on the plate 1 and is pressed by the force of the hand on top of the plate 2. In this case, the elastomer layer 3 is deformed and repeats the relief of the structure under study. The presence of a thin reflective layer 4 of the metal does not prevent the deformation of the elastomer. When the device is illuminated with light of either a specific source or scattered light, the relief formed on the flat mirror surface of plate 2 is directly visible to the naked eye and, if necessary, can also be read using a standard digital device, for example, a video camera, for further

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detailed analysis of the studied relief in order to verify its authenticity.

When using the proposed detector for fingerprinting, the finger is pressed directly to the plate 2, the smooth mirror surface of which is modulated by relief lines repeating the papillary pattern visible to the naked eye. After the pressure ceases, the elastomer layer 3 restores its properties, so that the device can be used for repeated tests.

The proposed device is extremely simple to manufacture and use. In its manufacture, no expensive and complex components are used, its application does not require any power sources, as well as highly qualified personnel or a specially equipped workplace, it is compact and easy to transport. Due to these advantages, the proposed device can be widely used for operational visual control of the authenticity of banknotes and documents, as well as in forensics for fingerprint cards and transferring them to a computer database.

The possibility of industrial application of the claimed technical solution is confirmed by the known and described in the application means and methods by which it is possible to implement the utility model in the form described in any of the paragraphs of the utility model formula. The proposed device can be manufactured industrially from the simplest known materials (elastomer) using known technologies and technical means (plates, reflective coatings), which determines, according to the applicant, its compliance with the criterion of “industrial applicability.

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Claims (4)

1. The relief detector, mainly for monetary documents, including a base and means for forming a relief image, characterized in that the means for forming a relief image is made in the form of a plate of transparent material, on one side of which a layer of transparent elastomer and a reflective coating are successively applied, made in the form of a thin layer of metal. 2. The detector according to claim 1, characterized in that the base and the means for forming a relief image are made in the form of two elements that are not interconnected. 3. The detector according to claim 1, characterized in that the base and the means for forming a relief image are made in the form of two plates located one above the other and connected to each other with the possibility of combining their facing each other surfaces when applied, one of the plates made of a transparent material, and a layer of a transparent elastomer and a reflective coating are applied to its side facing another plate. 4. The detector according to claim 3, characterized in that the two plates are formed by the leaves of a bent strip made of a transparent material.