WO2014209167A1

WO2014209167A1 - Multi-layer product containing a protective element on the surface of a paper or polymer carrier, and product authenticity determination method

Info

Publication number: WO2014209167A1
Application number: PCT/RU2014/000440
Authority: WO
Inventors: Аркадий Владимирович ТРАЧУК; Андрей Борисович КУРЯТНИКОВ; Игорь Васильевич ПАВЛОВ; Александр Игоревич МОЧАЛОВ; Алексей Витальевич САЛУНИН; Галина Сергеевна БАРАНОВА; Алексей Борисович СОРОКИН; Константин Геннадьевич РЫБИН
Original assignee: Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак")
Priority date: 2013-06-28
Filing date: 2014-06-18
Publication date: 2014-12-31
Also published as: RU2528646C1; EP3015278B8; EP3015278B1; CN105636797B; CN105636797A; EP3015278A4; EP3015278A1

Abstract

The invention relates to the field of protecting against the counterfeiting of products made on a paper carrier or on a polymer carrier, and is intended for visually determining the authenticity of a protected printed product. A product, for instance, a valuable document, comprising a carrier and a multi-layer protective element containing a latent image. The protective element is indiscernible when the document is examined at a right angle to the surface thereof, but becomes visible when the angle of observation changes. The latent image is comprised of two identical graphical elements of different colors, which are formed by means of the mutual offset of portions of a three-dimensional raster and of a multi-colored raster cover by a distance which is a multiple of half of the period of the raster, and which are positioned in a single plane relative to one another. The elements are positioned at a distance which allows for the viewing of a stereoscopic image thereof by using anaglyph glasses and/or color light-filters. The technical result is an increased level of protection of a valuable document.

Description

MULTI-LAYERED PRODUCT CONTAINING ON THE SURFACE OF A PAPER OR POLYMERIC MEDIA PROTECTIVE ELEMENT, METHOD

DEFINITIONS OF PRODUCT AUTHENTICITY

Technical field

The invention relates to the field of protection of products containing paper or polymer media, and can be used to visually determine the authenticity of various printing products, such as banknotes and letterhead paper, as well as excise and postage stamps. In addition, this invention relates to a method for verifying the authenticity of data of valuable documents.

State of the art

One of the most effective and technically feasible solutions for verifying the authenticity of such products is the use of bright and unusual security features based on various visual effects. The advantages of this approach are the ease of authenticity determination, high control performance and a high level of security.

Such visual effects include, in particular, the effect of the movement of a graphic object, the effect of changing the shape, size, color, volume effect (stereoscopy).

The urgent task of manufacturers of securities and secure printing products is the search for new protective signs with pronounced visual effects, including those based on stereoscopy.

It is well known that by stereoscopic vision we mean spatial (volumetric) vision, which causes the appearance of a three-dimensional visual image of the observed object due to parallaxing, looking around the object from different sides in the subject space. When binocular observation in the subject space of a point A (Fig. 1), its images in the right and left eye (respectively A _p to A _l ) fall on the center, pits of the retina, and the sighting axis of the eyes form angular parallax. All points objective space (B, Seet. d.), visible with same angular parallax lie on a circle passing through the point a and indurated nodal point of the eye and O _l and O, and are called horopter. Images of the points of the object lying on the horopter are drawn on the so-called corresponding points of the retina, which are respectively in the right and left eye at equal distances from the central fossa.

Identical images obtained at corresponding points always merge into a single image. Images of points located closer or further than the horopter are obtained on inappropriate points of the retina, which is a signal to the brain to sense the different distances of these points of the object from the eyes. In vivo when looking at different objects the horopter is constantly being rebuilt. The discrepancy (disparity) of images of the object’s distant points on the retinas is greater, the greater the difference in the angular parallaxes of the fixed point A and the simultaneously observed points B ', C, etc.

A stereoscopic or spatial image of an object is an image of an object that appears to the observer as three-dimensional (three-dimensional), transmitting the shape of the objects being depicted, the nature of their surface, relative position in space and other external signs. A stereoscopic image appears in the human mind as a result of the merging into a single visual image of two flat images of a stereo pair, considered separately by each eye. Each of the two images of the stereo pair represents the central projection of the object (obtained, for example, by photographing) from the right and left points of view, spaced horizontally at a distance, called a stereo base. The image of the object obtained from the right point should be viewed with the right eye, and the image obtained from the left point should be viewed with the left eye. The simplest device for such an examination is a stereoscope. Since the right and left images of the stereo pair are different angles of the object, when they are optically superimposed on one another, they are not completely combined, the images of the object's differently spaced points are shifted to the right or left relative to each other, forming a horizontal linear parallax. The parallax value depends on the remoteness of the observed image point. If the point of the right image in the alignment plane is to the right of the left image of this point, then the parallax is considered positive and the spatial position of the fused image of this point in the stereoscopic image will appear to be located beyond the alignment plane; if the point of the right image is located to the left of the point of the left image, then the parallax is considered negative and the merged image of the point is in front of the alignment plane; with parallax equal to zero, a fused image is formed in the alignment plane.

The optical superposition of the right and left images of the stereo pair on top of each other is carried out by selective projection or printing of these images, allowing at the same time through special filters to select each image from their “mixture” to present it to the intended eye. Depending on the methods of image filtering, the following methods of reconstructing a stereoscopic image are distinguished: spectacle - anaglyphic, polarizing, eclipse; frameless (raster) - single-stereopair and multi-angle.

In the anaglyphic method for reproducing stereoscopic images (Fig. 2), spectral separation of stereopair images is used. In this case PT / RU2014 / 000440

5 one of the stereo pair images, e.g. the right ^a R ^ R is printed on the screen E with red ink, and the left image ^a b ^, superimposed on red, is printed with green ink. Then, looking at the images through colored glasses, with the left eye L through the red filter Fj we see the dark silhouette of the green image ^a L ^ L ₅ and with the right eye R through the green filter we see the dark silhouette of only red

The fused image of the points ^a B n ^a L, respectively fixed by the right R and the left L eye, will be visible at the intersection of their lines of sight at point A in front of the screen E. Similarly, the visual merging of the points ^ K and ^, visible with the right and left eye, creates an image of the point B, lying behind the screen E. Thus, points A and B will be spatially separated. This method is easily implemented and widely used to obtain stereoscopic images in printing, film, television, however, it does not allow reproducing color three-dimensional images.

The prior art technical solutions that use stereographic images to protect printed products from counterfeiting.

For example, decision GB 1286309, 08/23/1972, describes the use of stereoscopic images observed with the naked eye, which is obtained using separate image patterns that form stereoscopic effect when applying a prismatic raster.

It also describes a solution based on a stereoscopic image obtained by the anaglyphic method, with part of the image printed in color, and part of the image formed with a watermark, and observation is made in anaglyphic glasses.

These decisions are outdated, and currently do not represent a serious methodological difficulty for a fake. It should also be noted that the above solutions do not allow the use of latent images.

It is known to use a moire magnifying structure as a protective element. Such decisions are based on the receipt of stereoscopic or 3D images using lens rasters, see, for example, US 5712731, 01/27/1998, RU 2466030, 10.11.2012.

EP 1429212, 04/16/2004, describes a security method for a security based on the use of a hologram with a pseudo-volume image. However, this technology has received widespread over the past decade and has become generally available for fake. In addition, the use of a hologram implies certain restrictions on the resulting stereoscopic image, which consists in the characteristic rainbow shine of the elements and the substrate.

Known solution WO 2006066732, 06/29/2006, which describes a contour image for education stereoscopic image, and a method for its production. A known solution involves the use of a special image to control the authenticity of a protected document with the property of volume and / or change in the observed angle. However, the technical problem is not fully solved due to the fact that currently the technology for producing holograms of various types is widely available, and at the same time, obtaining the desired result does not require the use of special technology.

Closest to the proposed invention is a medium of information characterizing its authenticity, which contains a coating made in the form of a multicolor printed raster, and a three-dimensional raster. A three-dimensional raster is positioned relative to the coating so that it is at least partially located on the coating. The width of the lines and the distance between the lines of the printed and three-dimensional rasters and the relative orientation of the rasters are chosen so that they form a moire image, when viewing the medium at a right angle to the surface, the coating is completely distinguishable, and the moire image is hidden. When viewed at an acute angle, the part of the coating located on the surfaces of the three-dimensional raster located parallel to the direction of observation or closed from the observer by the elements of the three-dimensional raster is not distinguishable, but the part of the coating located on the surfaces of the three-dimensional raster facing the observer is distinguishable and not closed from the observer by elements of a three-dimensional raster, as a result of which the moire image becomes visible. The border of the two colors of the printed raster is mainly located on the inclined sections of the three-dimensional raster. With a change in the angle of inclination of the carrier, the effect of movement of the boundaries of the colored bands on the carrier is observed. The invention made it possible to improve a security feature with a moire effect by obtaining a dynamic effect that facilitates verification of the authenticity of a carrier by a non-qualified user (RU 2440248, 01.20.2012).

However, in this decision, adopted as a prototype, there is no possibility of identifying the authenticity of a protected product having an initially hidden volumetric image that can be observed in anaglyph glasses or through color filters.

Disclosure of invention

The objective of the invention is to create a product with a high level of protection against fake and simplify the determination of its authenticity.

The problem is solved by the described multilayer product containing a protective element on the surface of a paper or polymer carrier, including a multi-color coating in the form of a periodic raster, made at least two different colors, contrasting with respect to the surface of the carrier, and a three-dimensional embossed raster with a multiple period, located in relation to the coating so that it is at least partially located on it, at least partially oriented in space in the same way as a multi-color coating raster, and together with it forms a latent image which, when viewing the product at a right angle to the surface, is indistinguishable, and when the viewing angle changes, it becomes visible, characterized in that the latent image consists of two identical graphic elements of different colors formed by and due to the mutual displacement of the sections of the three-dimensional raster and the raster of a multi-color coating by a distance multiple of half the raster period, and which are located relative to each other in the same plane at a distance that allows you to observe a stereoscopic image of a graphic element using anaglyph glasses and / or color filters.

The invention is also characterized in that the product contains an upper optically transparent layer, and a three-dimensional raster is made on the surface of this transparent layer, and a multicolor coating is located under it, while the apparent movement and / or shift of the images is provided.

Preferably, the latent images forming a stereoscopic image are made in the form of identical figures offset from each other in the same plane by a distance of 0.5 to 10 mm.

Preferably, the latent images forming a stereoscopic image are made in the form of identical figures that have at least two different image elements offset from each other in each figure with respect to the other figure in the same plane in mutually opposite directions to form a stereoscopic effect of the distance between these elements relative to the observer.

Preferably, the multilayer product is a banknote, an excise stamp, a postage stamp, a passport, a travel document, a driver’s license, an identity card, security paper, plastic card, security paper, label, packaging, payment document.

A multicolor raster (a multicolor coating in the form of a periodic raster) may contain additional color-changing properties that appear when observing a document from different angles.

Mostly, the multi-color raster is made by the printing method.

Preferably, the sections of the three-dimensional raster that form the stereoscopic image are made in the form of geometric figures, guilloche elements, graphic and alphanumeric characters, form an encoding or represent any combination of all of the above. A multilayer product is also characterized in that the multicolor coating is formed by materials having different absorption in the infrared range of the optical spectrum.

The sections of the three-dimensional raster that form the stereoscopic image, mainly represent information for identifying the person, and / or photograph for identifying the person.

The carrier, at least in the area of the multilayer protective element, can be made transparent.

A latent stereoscopic image can be observed in the light when the product is tilted.

To enhance the visual stereoscopic effect, the multicolor coating is preferably formed by materials having luminescence under the influence of daylight.

The claimed multi-color coating can be formed by materials having different selective absorption in the infrared range of the optical spectrum, while the image is formed by partially removing the coating by laser radiation with a wavelength located in the spectral region of its absorption.

The problem is also solved by the described method for determining the authenticity of the multilayer product described above, in accordance with which at least two types of observations are carried out, one of which are produced when placing the product at a right angle and at the same time record the absence of an image, and the second type of observation is carried out through anaglyph glasses or through different filters for the right and left eyes, each of which has selective transmission in the spectral range of one of the coating colors, while the product placed at an angle different from the straight line, and the initially hidden stereoscopic image of the graphic element is fixed, the plane of which visually appears to be mismatched connecting with the plane of the product.

The proposed invention allows to obtain a visual effect of the volume, or different distances of various graphic elements of the image relative to each other and / or the plane of a valuable document, and is based on the stereoscopic vision of a person, which allows you to observe a stereoscopic (or spatial) image of objects.

Brief Description of the Drawings

In FIG. Figure 1 shows a diagram of binocular observation in the subject space of a point A at which its images in the right and left eye (respectively, A and A are A _l ) fall on the center, pits of the retina, and the sighting axis of the eyes form angular parallax. All points of the subject space (Sit. D.), Visible with the same angular parallax, lie on a circle passing through the fixed point A and the nodal points of the eyes O p and O l are called the horopter. Images of the points of the object lying on the horopter are drawn on the so-called corresponding points of the retina, which are respectively in the right and left eye at equal distances from the central fossa. In FIG. 2 shows a diagram of an anaglyphic method for reproducing stereoscopic images in which spectral separation of stereopair images is used.

The right image of the stereo pair ^a R ^ R is printed on screen E with red ink, the left image is ⁰ ! ^!., Superimposed on red, printed with green ink. When viewing the image through colored glasses, the left eye L through the red filter Fj sees the dark silhouette of the green image, the right eye R through the green filter sees the dark silhouette of only the red image ^a R ^ R The fused image of points ⁱⁿ B and ^a £, respectively fixed by the right R and left L with the eye, visible at the intersection of their lines of sight at point A in front of the screen

E. Similarly, the visual merging of the * K and ^ 1 ”points visible by the right and left eye creates an image of point B lying behind the screen E. Thus, points A and B are spatially separated.

FIG. 3 shows a valuable banknote document containing a contrast substrate, offset by printing in two different colors, red and blue. Fig. 4 shows a three-dimensional raster deposited on top of a banknote substrate.

In FIG. Figure 5 shows the observation of a valuable document through anaglyph glasses with red and blue filters, in which two multi-colored images that appear only when the document is viewed at an angle form a single image.

In FIG. Figure 6 shows anaglyph glasses equipped with red and blue filters through which a valuable document is observed.

FIG. 7 shows the mismatch of the apparent plane of a single image with the plane of a valuable document.

BEST MODE FOR CARRYING OUT THE INVENTION A valuable document in the form of a banknote containing a contrasting substrate, offset by printing in two different colors, red and blue (Fig. 3), and a three-dimensional raster printed on top of it, as shown in FIG. four.

A valuable document is observed through glasses equipped with red and blue filters (Fig. 6) and it is determined that two multi-colored images appearing only when the document is viewed at an angle (Fig. 5) form a single image observed through anaglyph glasses (Fig. 6) ), while the apparent plane of this image does not coincide with the plane of the valuable document (Fig. 7). The presence of this visual effect characterizes the authenticity of a valuable document.

The presented example does not limit the scope of the invention, but only illustrates it.

From the information presented in the description, we can make an unambiguous conclusion that the invention provides an increased degree of protection of valuable multilayer products from counterfeiting, obviously exceeding the degree of protection of similar products known from their prior art.

Industrial applicability

The invention is applicable in the field of protection of products containing paper or polymer media, and can be used to visually determine and verify the authenticity of various printing products, such as banknotes and letterhead paper, as well as excise and postage stamps.

Claims

CLAIM

1. A multilayer product containing a protective element on the surface of a paper or polymer carrier, including a multi-color coating in the form of a periodic raster, made at least two different colors, contrasting with the surface of the carrier, and a three-dimensional raster in the form of stamping with a multiple period, located relative to the coating so that it is at least partially located on it, at least partially oriented in space in the same way as a raster of a multicolor coating, and together with it forms a latent image which, when viewing the product at a right angle to the surface, is indistinguishable, and when the viewing angle changes, it becomes visible, characterized in that the latent image is two identical graphic elements of different colors, formed due to the mutual displacement of the sections of the three-dimensional raster and the raster of a multi-color coating by a distance a multiple of half the raster period, and which are located relative to each other in the same plane at a distance that allows you to observe a stereoscopic image graphically element using anaglyph glasses and / or color filters.

2. A multilayer product according to claim 1, the clause being that it contains an upper optically transparent layer, wherein a three-dimensional raster is made on the surface of this transparent layer, and a multi-color coating is located under it, while the apparent movement and / or shift of the images is provided.

3. The multilayer product according to claim 1, characterized in that the latent images forming a stereoscopic image are made in the form of identical figures offset from each other in the same plane by a distance of 0.5 to 10 mm.

4. The multilayer product according to claim 1, characterized in that the latent images forming a stereoscopic image are made in the form of identical figures that have at least two different image elements offset from each other in each figure with respect to another figure in the same plane in mutually opposite directions for the formation of a stereoscopic effect, the different distance ™ of these elements relative to the observer.

5. A multilayer product according to claim 1, characterized in that it consists of a banknote, excise stamp, postage stamp, passport, travel document, driver's license, identity card, security paper, plastic card, security paper, label, packaging, payment document .

6. The multilayer product according to claim 1, characterized in that the multicolor raster contains additional color-changing properties that occur when observing a document at different angles.

7. The multilayer product according to claim 1, characterized in that the multicolor raster is made by the printing method.

8. A multilayer product according to claim 1, characterized in that the sections of the three-dimensional raster that form the stereoscopic image are made in the form of geometric figures, guilloche elements, graphic and alphanumeric characters, form an encoding or represent any combination of all of the above.

9. A multilayer product according to claim 1, characterized in that the multicolor coating is formed by materials having different absorption in the AND range of the optical spectrum.

10. A multilayer product according to claim 1, characterized in that the sections of the three-dimensional raster forming a stereoscopic image are information for identifying a person, and / or a photo for identifying a person.

11. A multilayer product according to claim 1, characterized in that the carrier, at least in the area of the multilayer protective element, is transparent.

12. A multilayer product according to claim 8, characterized in that the latent stereoscopic image is observed in the lumen when the product is tilted.

13. A multilayer product according to claim 1, with the proviso that in order to enhance the visual stereoscopic effect, the multicolor coating is formed by materials having luminescence under the influence of daylight.

14. A multilayer product according to claim 1, with the stipulation that a multicolor coating is formed by materials having different selective absorption in the IR range of the optical spectrum, while the image is formed by partially removing said coating by laser radiation with a wavelength located in the spectral region of its absorption.

15. The method of determining the authenticity of the multilayer product described in paragraphs 1-13, characterized in that at least two types of observations are made, one of which is made when placing the product at right angles and fixes the absence of an image, and the second type of observation is carried out through anaglyphic glasses or through different filters for the right and left eye, each of which has selective transmission in the spectral range of one of the coating colors, and in the second type of observation from Elie arranged at an angle different from a direct and thus fixed initially hidden stereoscopic image graphic element whose plane of arrangement seems visually mismatched with the product plane.