EP2890568A1

EP2890568A1 - Security document having a multicolored and two-sided security feature

Info

Publication number: EP2890568A1
Application number: EP13753661.1A
Authority: EP
Inventors: Edward Springmann; Malte Pflughoefft
Original assignee: Bundesdruckerei GmbH
Current assignee: Bundesdruckerei GmbH
Priority date: 2012-08-31
Filing date: 2013-08-30
Publication date: 2015-07-08
Anticipated expiration: 2033-08-30
Also published as: EP2890568B1; DE102012215475A8; DE102012215475A1; WO2014033260A1

Abstract

The invention relates to a security document (1), a method for the production thereof, and a verification method. A security document (1) is proposed, comprising a document body (2) having a front side (9) and an opposite rear side (10), wherein the document body (2) is transparent for transmitted light observation at least in a window area (3), and wherein graphical information (4) that can be perceived in reflected light observation of the front side (9) is stored on or in the document body (2) in the window area (3), wherein the graphical information (4) is formed by means of at least two different types of image elements (5, 6), wherein an image element grid (15, 16) having grid locations is associated with each of the at least two different types of image elements (5, 6) and the image elements (5, 6) of a type are arranged only at grid locations (25, 26) of the image element grid (15, 16) associated with the type, and wherein the image element grids (15, 16) have grid locations (25', 26') corresponding to each other, which are arranged adjacent to each other in the document body (2), wherein a lens grid (50) is formed on the rear side (10) of the document body (2) and wherein the image element grids (15, 16) are designed and arranged in relation to each other and to the lens grid (50) in such a way that there are at least two preferred detection directions (65, 66) in regard to the rear side (10) of the document body (2), in each of which preferred detection directions only the image elements of one type (5, 6) of the graphical information (4) can be detected through the lens grid (50) at a time.

Description

Security document with multicolor and two-sided security feature

The invention relates to a security document and a method for its production with a preferably colored security feature and a verification method.

A variety of security documents are known in the art. These include, for example, identity cards, passports, driving licenses,

Identification cards, visas, but also counterfeit-protected labels and packaging as well as other types of value documents such as banknotes, stocks,

Securities, just to name a few.

Security documents have the common feature that they comprise at least one feature that makes at least significantly more difficult or even impossible unauthorized production, imitation, adulteration or the like. Such features are referred to as security features. physical

Embodiments of security features are also referred to as security elements. In this sense, each security document which forcibly comprises at least one security feature also constitutes a security element.

In the case of a large number of security documents, it is desirable to store individual information in the individual security documents, for example assigned to a person to whom the security document is assigned. For a passport, such individual information is, for example, a name

Date of birth, place of residence or biometric data such as a facial image, a

Fingerprint or similar. Individual information associated with a person is also referred to as personal information. The process of

Adding personal information to a security document is also referred to as personalization.

In addition to such individual or personal information will be in

Security documents of a class, such as a passport of a state, usually additionally formed a variety of other security features that complicate and / or impossible imitation, falsification, duplication and the like and additionally allow verification of the document as a real document. These are thus usually for all documents of this Class, ie for all passports of a state, for example. These

Security elements are usually located in a central location

Security document production integrated into the security document. Personal and / or individual information is also already stored in the security document in the case of some production processes and documents. In other embodiments, however, only a security document blank is produced in the central production, which is then subsequently customized centrally or decentrally with individual and / or personal information or

is personalized.

From DE 103 58 784 A1 a data carrier is known, in which by a laser beam markings in the form of patterns, letters, numbers and / or images

are introduced, which caused due to the laser beam, from

Material changes resulting local changes in the optical properties of the disk are visible. The volume includes one in the visible

Spectral range transparent, laser-sensitive recording layer, which with a

Surface relief is provided in the form of a lenticular grid. The markings are introduced into the recording layer with the laser beam from different directions through the lenticular grid and can be recognized from the same directions when viewed later. The data carrier is transparent at least in the area of the introduced markings. The resulting from the material transformations local changes in the optical properties of individual pixels are for the

different directions at least partially identical. Become at all

Picture elements with different optical properties, eg. As different levels of gray over different blackening generated, so are from each direction usually all different blacks and thus types of pixels to see. A certain level of gray does not only occur in one of the directions.

In order to enable a decentralized individualization and / or personalization, the technical effort required to store the information must be kept as low as possible. Therefore, in particular printing process for printing of

Information on an otherwise completed or largely completed security document blank. However, information stored in this way, being formed on the surface of a document body, is relatively susceptible to tampering. Therefore it is necessary to have the saved To secure information relating to verification of authenticity. Even with centrally stored in a document body information which, for example, in the interior of the document body via a printing of a

Substrate layer, which is laminated with other substrate layers to the document body, can be stored, is a hedge against

Manipulations desirable.

The invention is therefore the technical object of an improved

Security document, a method for its production and a

To provide verification methods that do not have the disadvantages known from the prior art or reduce.

The invention is based on the idea of personalizing and / or individualizing information, possibly also not individualizing and / or not

personalizing information to save in a document body. The

Storage takes place here by means of at least two different types of

Picture elements, which can be arranged in each case at grid locations of a picture element grid assigned to the respective picture element type. The thus at least two

Pixels rasters are matched to each other so that with each raster point of a pixel raster corresponds to a corresponding raster point of another pixel raster. The corresponding grid locations of the pixel grid are adjacent to each other in the security document. Preferably, the raster points of the different picture element rasters are laterally offset relative to one another with respect to a document surface, ie they are not superimposed. The information is stored in the document body in a window area which, without the stored information being present, is made transparent for a review. The information is stored in the document body so that it is perceptible in an optical supervision. The graphic information can thus for example be printed on the upper side or formed in the interior of the document body, for example by the information being printed on a substrate layer before it is joined to the document body with further substrate layers. To secure the graphic information, a lenticular grid is formed on the back of the document body, which is adapted to the Bildelementeraster. Both with regard to the arrangement and the grid design, the lenticular grid is adapted so that at least two preferential detection directions with respect to a detection of the graphic information through the lens grid from the back of the document body, among which only the

Pixels of a type are perceptible. In a preferred detecting direction of the at least two preferential detecting directions, only the picture elements of one type and under another preferential detecting direction are the at least two

Preferential detection direction are only the picture elements one of which one type

different, i. different, type of picture elements perceptible.

The graphical information is preferably colored in that monochrome picture elements of a color system are used to generate the graphic information. For example, become cyan, magenta and yellow

Image elements used, it can be from each three grid points that are assigned to each other, pixels of any color impression of the CYM color system produce. Thus, it is possible to store full color graphic information in the document body using picture elements of three types. The lenses of the lenticular grid formed on the rear side are now arranged with respect to the individual raster points of the different pixel louvres such that in each case only the

Picture elements of one type, i. in this example of a base color of the color system are detectable. Thus one receives among the different ones

Preferential detection directions of a consideration of the optical detection of the graphic information through the back of the security document, ie through the lens grid, color-separated extracts of the stored graphical information. This significantly complicates the falsification and / or falsification of the security document, since both the addition of image elements for changing the information content and delamination and reassembly with the lenticular is almost impossible without subsequently individual pixels of one type at rasters of a pixel raster of another Type exist at least in relation to the intended arrangement of the individual grid locations with respect to the lenticular grid. As a result, such picture elements are conspicuous in a verification of the security document under one of the preferential detection directions because they deviate from the optical characteristic of the picture elements of the type which should be exclusively detectable under this preferential detection direction. Is after a delamination, a manipulation of the graphic information and the reassembly of a whole Bildelementeraster relative to the lenticular grid, no picture elements of the expected type are perceptible under the one preferential detection direction.

definitions

The picture element considered is a graphic unit which has a defined value with regard to at least one optical property. Image elements of one type all have the same optical detectable property. Preferably, this is

Property characterizing a type of picture elements, a color associated with the picture element of this type.

The grid is a geometric structure which reveals an order pattern at least along a spatial direction. Preferably, patterns at least under two mutually orthogonal directions detect regularity. As a rule, grids are made up of grid points which are intended to be punctiform, wherein the individual grid locations can each be assigned to one cell and the grid is constructed by a periodic repetition of the cell structure. It is possible that individual dimensions of the cell are varied. A simple example of a raster is a matrix of rows and columns. The individual resulting cells, such as their midpoints, then form

Grid positions. Likewise, however, one can also understand the crossing points of vertical and horizontal mutually parallel lines as grid locations of a grid constructed of rectangular cells. In this case, for example, a length of the rectangles along an excellent direction can be systematically varied in the raster, so that, for example, at the edges, the vertical lines have larger distances than the vertical lines in a center of the raster.

Similar grids are those grids which have a corresponding geometric structure, preferably a nearly identical structure, and are merely displaced relative to each other with respect to their positioning in space.

Corresponding raster points of such similar rasters are those

Grid locations that are at a minimum distance from each other. If one starts from a raster position of a raster, the adjacent raster position of another raster is that raster position which has a minimum of the first raster position. If there are several nearest neighbors, then an arbitrary definition for one will be used

Directed spatial direction under which the nearest neighbor should also be located for the other grid locations of the one grid.

The mutually adjacent, corresponding grid locations of different pixel rasters are lateral, e.g. relative to the front of the

Document body, offset.

As a printing process, all known in the security document area

Printing process understood. These include, for example, an inkjet print,

Retransfer printing, D2T2 printing, offset printing and other printing processes.

As lenses all those surface structures are considered, which differ due to the geometric shape of an interface between media

Refractive index have a caused by a refraction imaging property for light.

Preferred embodiments

In particular, a security document is created which has a

Document body comprises, which has a front and an opposite rear side, wherein the document body is transparent at least in a window portion for a review, and wherein on or in the

Document body in the window portion is stored a visible in a top view of observable graphical information, wherein the graphical information is formed by at least two different types of pixels, wherein each of the at least two different types of pixels is assigned a raster having pixel raster and the pixels of a type are arranged only at raster locations of the pixel array associated with the type, and wherein the pixel arrays have respective raster locations disposed adjacent to each other in the document body, wherein it is provided that a lenticular array is formed on the back of the document body, the pixel arrays being formed and are arranged to each other and relative to the lenticular grid, that at least two preferential detection directions with respect to the back of the document body exist, among which by the Lenticular raster through only the picture elements of a type of graphic information can be detected.

The picture elements of one type each have a uniform optically perceptible impression. In particular, each color of the individual types of picture elements is assigned. The associated colors are preferably colors of a color system, for example a cyan-magenta-yellow or cyan-magenta-yellow-black color system or alternatively a red-green-blue (RGB) or red-green-blue color system. Black (RGBK) color system.

Further, there is provided a method of manufacturing a security document, comprising the steps of: preparing a document body that is transparent at least in a window area between a front side and a back side of the document body, storing a front side in a top view

perceptible graphical information in the area of the front window or in the document body, wherein the graphical information is formed by at least two different types of picture elements, each of the at least two different types of picture elements having a raster

Or is assigned to Bildelementasteraster and the picture elements of a type are arranged only at grid locations of the type associated Bildelementasteraster and the Bildelementeraster have corresponding grid points which are arranged adjacent to each other in the document body, wherein at the back of the document body, a lenticular grid is formed and the Pitch frames are formed and arranged relative to one another and relative to the lenticular grid such that at least two preferential detection directions with respect to the back of the

Document bodies exist under which only the picture elements of one type of graphic information can be detected through the lens grid. The

Image elements of one type are identical with regard to at least one optically detectable or perceptible property and differ at least in this optically detectable property from all image elements of the other

different types of picture elements. Such a security document can be verified, for example, by a method in which a

Viewing a front side of the document body, the graphic information is detected and evaluated and additionally under at least two pre-defined preferred detection directions with respect to the back of the document body a Considering the graphic information is made by the lenticular on the back of the document body, and it is checked whether only the picture elements of one type are detected under the at least two preferred detection directions. If this is the case, then a positive verification decision is optionally additionally made depending on the evaluation of the graphic information itself.

Otherwise, a negative verification decision is made. Since the picture elements of one type always have an optically detectable characteristic with respect to which they are identical and different from the picture elements of other types, it can always be checked in verification whether there is an optically detectable property under one of the preferred detection directions for all detectable ones

Pixels is found only a uniform expression, which does not occur under another preferred detection direction of the at least two preferential detection directions.

In a preferred embodiment, the graphical information is thus by means of the picture elements of the at least two different types of picture elements

designed so that the information content of the graphic information can not be derived from the picture elements of a type. If the graphic information includes a lettering of alphanumeric characters, then none of them is one of the

Preferred detection directions through the lens raster detected through the entire caption removed image. If the information comprises a bar code, none of the detected images can be taken from all positions and widths of the bars of the bar code.

For example, in an even more difficult to falsify embodiment, the graphic information comprises alphanumeric characters and the graphic information is arranged so that none of these characters under one of the preferential detection directions when viewed or captured image through the lenticular image on the

Rear of the document body can be detected. You get one each

A picture element pattern of the picture elements of a type of picture elements to which no cognitively detectable information can be taken. Such a picture element pattern is suitable for machine verification in which such picture element patterns are compared with one or more predetermined comparison patterns. For a positive

Verification indicating that the security document is authentic and genuine may match the captured pixel pattern to the comparison pattern be required or that a predetermined number of pixels correspond to pattern elements of the comparison pattern or that to each

Pattern element or a predetermined number of pattern elements of the

Comparative pattern exists a corresponding detected pixel of the pixel pattern exists. Likewise, alternatively or additionally, the optically detectable property of the captured picture elements can be evaluated and checked for a picture element pattern.

The Bildelementeraster and the lenticular grid preferably have a cell structure, wherein the cells of the individual Bildelementeraster correspond to each other. For example, the cells have a rectangular structure, particularly preferably a square structure. However, it is also possible to choose a triangular or hexagonal cell structure. A cell structure of the lenticular often differs in terms of a

Dimension of the cell structure, the geometric shape is often the same.

Particularly preferably, the graphic information is stored by means of a printing process. This can be done, for example, by printing the graphic information on the front side of a document blank in the region of the window.

Alternatively, a printing of a substrate layer or different

Substrate layers are made, which are joined together aligned with each other to the document body, for example, laminated together. A particularly good lateral alignment of the individual pixels of the

different types, i. the different picture element frames to each other, one obtains when the picture elements of different types either on the same

Substrate layer surface or on different surfaces thereof

Substrate layer to be printed.

The graphical information may also be in the form of a hologram in which the different types of picture elements are imprinted into the hologram by means of different wavelengths (i.e., colors). The different types of picture elements are each assigned to raster points of the type assigned to the type

Formed Bildelementerasters. The picture element rasters have mutually corresponding raster points. The Bildelementeraster are laterally offset from each other. The lenticular is preferably formed after storing the graphical information in the security document. For this purpose, an optical detection of the graphic information and an alignment, for example, of a sonotrode of an ultrasound embossing system relative to the security document blank takes place and the forming of the lens raster subsequently takes place by means of an ultrasound embossing method. This makes it possible to achieve a precise alignment of the lens grid with respect to the Bildelementeraster. Other embodiments may be different

Provide surface treatment methods, for example Ablationsverfahren, in particular laser ablation process to bring the lenticular in the back of the document body.

In other embodiments, it may be provided that the graphic

Information to be stored only after the formation of the lens grid in the document body. For this purpose, under one or more directions, for example, the preferred detection directions, directed light radiation can be directed to the underside of the document body and a light passage of the radiation can be determined by a surface to be printed. Accordingly adapted then the picture elements are formed in the document body. In particular, if the graphical information and thus also the lenticular grid a greater lateral extent in relation to a predetermined Sollbetrachtungsabstand or a

Have Sollbetrachtungsposition, occur in an optical detection of the graphical information through the lenticular through parallax errors. At a

Embodiment is therefore provided that the distances of the grid locations of the pixel grid and / or the lens grid vary at least along a spatial direction to account for parallax in the detection of graphic information from a Sollerfassungsposition and to compensate for parallax errors.

In yet another embodiment, the pixel grid and / or the lenticular grid, which have a cell structure, are formed such that a

Extension of the cells of the pixel grid and / or the cells of the lens grid along at least one spatial direction are varied or to account for parallax for stereo detection of a target position for at least one of the at least two preferred detection directions. Such an embodiment is particularly suitable for being verified by a human having both eyes trained for optical detection and thus stereographic detection. Preferably, the target detection position with respect to a midpoint between the eyes is defined at a desired distance vertically above the back of the security document. The lenticular and pixel emitters are aligned and arranged with respect to one another such that a tilt is tilted about an axis lying in the plane of the security document which is oriented perpendicular to the line connecting the eyes, so that a viewing among the at least two

Preferred detection directions is adjustable. In one embodiment, there are four preferential detection directions, among each of which one type of picture elements is detectable. In the embodiment described above, the third and fourth preferential detection directions are preferably designed such that a tilt about an axis parallel to the eye relief and axis of rotation lying in the document, the third and fourth preferential detection direction are adjustable by tilting about this axis of rotation.

The invention will be explained in more detail with reference to a drawing. Hereby show:

Fig. 1 is a schematic plan view of a security document;

2a shows a schematic sectional view through a security document with externally applied graphic information;

2b is a schematic sectional view through a security document with

internal stored graphical information;

Fig. 3 is a schematic representation of a detected view under a first

Preferred detection direction;

Fig. 4 is a schematic representation of one below another

Preferred detection direction detected image of the security document of FIG. 1;

Fig. 5 is a schematic representation for explaining the verification of a

Security document; Fig. 6 is a schematic representation for explaining a method for

Create a security document.

In Fig. 1, the plan view of a security document 1 is shown schematically. This comprises a document body 2, preferably made of different

Substrate layers is made on a plastic basis. There are, however

Embodiments possible in which the document body consists of a monolithic plastic block. The document body 2 is designed such that in a window area 3, a view from a front side 9, which faces the viewer, to a rear side, which faces away from the viewer, is possible. For example, the document body 2 may be made of transparent plastic layers, for example, preferably made of polycarbonate layers. As transparent, an object is considered, through which a detection and / or imaging of information according to the geometrical optics is possible.

On the front 9 or inside the document body 2 is a graphic

Information 4 stored. This is composed of picture elements of a first type 5 and

Picture elements of a second type 6 formed. The picture elements of the first type 5 are arranged at grid locations 25 of an associated picture element grid 15. Accordingly, the picture elements of the second type 6 are only at grid locations 26 of a second one

Pixel grid 16 is arranged. The picture element grid 15 and the

Pixel grid 16 thus have arranged at regular intervals

Grid locations 25 and 26, respectively. For each grid location 25, for example the grid location 25 ', there is a corresponding grid location, for example 26' of the other

Pixel grid. These are arranged in the document body 2 adjacent to each other. The corresponding grid locations 25 ', 26' thus have the smallest distance from each other to a grid location of the other pixel grid 5, 6. If a grid location 25 of a pixel grid 15 has the same spacing with respect to several grid locations 26 of another pixel grid 16, then a direction which is indicated here by means of the arrow 31 is determined in order to define adjacent grid locations 25 ', 26'. This definition has no real practical meaning and is included here for explanation only.

The picture elements of the first type 5 and the picture elements of the second type 6 differ with regard to at least one visually perceptible property, for example their Colour. In this case, the picture elements of the same type each have the same optical

Property on. In the illustrated embodiment, only picture elements of the first type 5 and of a second type 6 are shown. However, it will be understood by those skilled in the art that embodiments in which, for example, full color graphical information is to be stored preferably comprise at least three types of picture elements, more preferably even four types of picture elements. Thus, in such a particularly preferred embodiment, there are four

Pixel grid. A pixel grid for each type of pixel. In such a particularly preferred embodiment with four picture element screens, the picture elements assigned to the picture element screens preferably have the colors of a color system, for example the colors cyan, magenta, yellow, black or the colors red, green, blue and black. Thus, a color subtraction or color addition, a generation of full-color graphic information is possible.

The picture elements are preferably so small in size that they are no longer resolved as individual picture elements by a human observer at a viewing distance of, for example, 15 to 30 cm. On the back 10, which faces away from the viewer in the view of FIG. 1, are in

Window portion 3 formed in a lenticular lens or lens elements arranged. These are adapted to the Bildelementeraster and formed at the raster pixels in such a way that with respect to the back at least two preferential detection directions for optical detection exist, under which the graphic information 4 through the lenses of the lens raster through are detected in such a way that one of the preferred detection directions only the picture elements of a picture element type are perceptible. In embodiments employing four types of pixels, the lenses are preferably formed and the pixel arrays aligned and arranged with respect to the lenticular array so that there are four preferential detection directions, and among each of which one type of pixel is detectable. While the graphic information 4 is perceived in full color when the front side is viewed from the front or even when viewed through the transmitted light, one can only detect the part of the graphic information that is displayed with the aid of one type of picture element when viewing the back side from one in the preferred detection directions is trained. Preferably, therefore, one obtains different color separations of the graphic

Information 4. In Figures 3 and 4, the two views are shown schematically, which is detected under the two preferred detection directions of the security document of FIG.

FIG. 2 a shows schematically a sectional view through a window area 3 of a security document 1. In the illustrated embodiment, the picture elements 5, 6 are formed on the front side 9 of the document body 2, which is composed of different substrate layers 41, 42, for example. On the underside 10 of the document body 2 lens elements 51 can be seen, which are arranged according to a lenticular grid 50, which is adapted to the

Image element grid 25, 26 is formed and oriented. Also entered are the two preferred detection directions 65, 66, among which, for example, the views of the security document according to FIG. 1 shown in FIGS. 3 and 4 can be detected.

FIG. 2 b shows a schematic sectional view of a modified security document 1 in the region of the window area 3. In this embodiment, the document body 2 is formed of three substrate layers 41 to 43. A supreme

Substrate layer 41 serves as a cover layer. A middle substrate layer 42, which is formed from a transparent and, for example, laser-capable material, is printed on an upper side with the graphic information 4, which is formed by means of the picture elements 5, 6. A lowermost substrate layer 43 is laminated with the top and middle substrate layers 41, 42 to the document body 2.

Preferably, the substrate layers 41 to 43 are all produced on the basis of the same polymer, so that they can be combined particularly well in a lamination process to form a document body 2. In addition, preferably all substrate layers 41 to 43 are transparent.

On the rear side 10 of the document body 2, lens elements 51 are again formed in the lenticular grid 50, through which the image elements of one type of graphic information 4 can be detected through the preferred detection directions 65, 66. In the illustrated embodiment according to the sectional drawings of FIGS. 2a and 2b, the lens elements may be, for example, cylindrical lenses. But equally well, spherical lenses can also be arranged in a regular grid. In another preferred embodiment, hexagonal lenses are used which provide separation of full color graphic information in the different color separations allows. In order to avoid parallax errors, either grid spacings of the picture elements in the picture element grid to edges of the graphic information and / or the lens elements of the lens grid can have different distances than in the center of the lens grid or the graphic information in order to compensate for this. In one embodiment, this finds

Compensation so that even a stereoscopic detection, as performed for example by a human observer parallax free for the individual pixels of different types under different

Preferred viewing directions is possible.

FIG. 5 schematically shows a perspective view of a window area 3 of a security document 1 with a security document body 2. The same technical features are provided in all figures with the same reference numerals. The graphic information 4 is again formed by picture elements of two types 5, 6. For this purpose, lens elements 51 are arranged in a lenticular grid 50, so that two preferential viewing directions 65, 66 in this case symmetrical to a

Surface normal 70 of the back 10 of the document body 2 exist. The lenses 51 of the lens grid 50 are formed, for example, as cylindrical lenses. A rotation axis 71, which is parallel to a longitudinal axis of the cylindrical lenses, can be used as a rotation axis for the document body 2 to tilt the security document 1 for a fixed viewer so as to alternately intercept the security document 1 under the first preferential detection direction and from the back side the second preferred detection direction considered. Schematically indicated are the two views captured for the two different

Preferential detection directions. If the document is executed correctly and is not manipulated thereon, then under the one preferential detection direction 65, only the picture elements of the one type 5 (full circles) and the preferential detection direction 66 are only the ones

Capture picture elements of the other type 6 (open circles). This is schematically indicated below left and right. Due to the viewing from the back side, the partial information is detected "in mirror image" with the graphic information 4. On the other hand, if the security document 2 is viewed from the front side 9, then the graphic information 4, for example full color, is completely recorded, as indicated above in FIG ,

The production of a security document 1 will be briefly explained schematically with reference to FIG. First, different substrate layers 41 to 43 provided. Preferably, for example, they are all made of a transparent polycarbonate material. On the middle substrate layer 42, the graphic information 4 is printed using first picture elements 5 and second picture elements 6. The first picture elements 5 are each formed only at raster points 25 of a first picture element raster 15. Accordingly, the picture elements of the second type 6 are each formed only at grid locations 26 of a second picture element grid 16. Due to the small dimensions of the picture elements 5, 6, it is irrelevant that the picture elements can be arranged only at the grid points 25, 26, the them

associated pixel grid 15, 16 "belong".

After application, in particular printing of the graphic information 4 onto the middle substrate layer 42, the different substrate layers 41 to 43 are stacked on top of one another and connected to form a document body 2. This is preferably done in a high pressure, high temperature lamination process. Subsequently, the graphic information 4 formed in the document body 2 is detected by means of an optical detection device 90 and the document body 2 is aligned with the graphic information 4 with respect to a sonotrode 91 of an ultrasound embossing device 100. As soon as the sonotrode 91 is correctly aligned with respect to the graphic information 4, the lenticular screen 50 is inserted into the rear side 10 of the security document 1 by means of an ultrasound prepreg. H. of the document body 2, embossed. A security document 1 is obtained in which the graphical information can be completely optically detected via the front side 9. Under at least two

Preferential detection directions 65, 66 are visible in the window area 3 through the lens grid 50 only the picture elements of a type 5 or 6 of the graphic information 4 respectively.

It will be understood by those skilled in the art that only exemplary embodiments are described herein and other lens shapes and grids are possible. The rasters are based on the embodiments chosen here in each case on a square cell. However, there may be other cells at their characteristic vertices respectively

Raster locations are formed can be selected to form corresponding Bildelementeraster or lenticular grid. LIST OF REFERENCE NUMBERS

1 security document

2 document bodies

3 window area

4 graphic information

5 picture elements of one type

6 picture elements of a different type

9 front side

10 back side

15, 16 pixel grid

25, 26 grids

25 ', 26' corresponding grid locations

31 arrow

41 -43 substrate layers

50 lenticular grid

51 lens elements

65, 66 preferred detection directions

70 surface normals

71 axis of rotation

90 optical detection device

91 sonotrode

100 ultrasonic embossing device

Claims

claims

1 . Security document (1) comprising a document body (2) with a

Front (9) and an opposite rear (10), wherein the

Document body (2) at least in a window region (3) for a

Transparency is transparent, and wherein on or in the document body (2) in the window area (3) one at a

Visual information (4) is stored, wherein the graphic information (4) is formed by at least two different types of picture elements (5, 6), each of the at least two different types of picture elements (5, 6 ) one

Raster pixels (25, 26) exhibiting Bildelementeraster (15, 16) is assigned and the picture elements (5, 6) of a type only at grid locations (25, 26) of the type associated Bildelementerasters (15, 16) are arranged, and wherein the Bildelementeraster (15, 16) have corresponding raster points (25 ', 26') which are arranged adjacent to one another in the document body (2),

characterized in that

the image elements (5) of one type are all identical with respect to at least one optically detectable property and with regard to this at least one optically detectable property of picture elements (6) of a different type of picture elements (6) of the at least two

different types of picture elements (5, 6) and on the back (10) of the document body (2) a lenticular grid (50) is formed, wherein the Bildelementeraster (15, 16) formed and relative to each other and relative to the lenticular grid (50) are arranged that at least two

Preferred detection directions (65, 66) with respect to the back (10) of the

Document bodies exist under which only the picture elements (5, 6) of one type of graphic information (4) can be detected through the lens grid (50).

2. Security document (1) according to claim 1, characterized in that the Bildelementeraster (15, 16) and the lenticular grid (50) have a cell structure, wherein extensions of the cells of the Bildelementeraster (15, 16) and / or the cells of the lens grid ( 50) along at least one spatial direction vary to account for parallax in acquiring the graphical information from a set point position.

3. Security document (1) according to claim 1 or 2, characterized in that the variation of the extent of the cells of the Bildelementeraster (15, 16) and / or the cells of the lens grid (50) along the at least one spatial direction are made so that a Parallax for stereo detection from a nominal position for at least one of the at least two

Preferred detection devices (65, 66) is taken into account.

4. Security document (1) according to one of claims 1 to 3, characterized

in that the picture elements of one type (5, 6) have the same optical property.

5. A method for producing a security document (1) comprising the steps:

Producing a document body (2) which, at least in a window area (3), is arranged between a front side (9) and a rear side (10) of the

Document body (2) is transparent;

Storing graphical information (4) perceptible in the front view (9) in the window area (3) on the front side (9) or in the document body (10), the graphic information (4) being obtained by means of at least two different types of picture elements (4). 5, 6), wherein each of the at least two different types of pixels (5, 6) is associated with a raster-containing pixel raster (15, 16) and the pixels of a type (5, 6) are applied only to raster points (25, 26). the picture element grid (15, 16) associated with the type, and wherein the picture element grid (15, 16) have respective grid locations (25 ', 26') adjacent to each other in the document body (2),

characterized in that

distinguish different types of picture elements (5, 6) and at the Rear side (10) of the document body (2) a lenticular grid (50) is formed, wherein the Bildelementeraster (15, 16) are formed and arranged relative to each other and relative to the lenticular grid (50) that at least two

Preferred detection directions (65, 66) with respect to the back (10) of the

Document body (2) exist under which only the picture elements of one type (5, 6) of the graphic information (4) can be detected through the lens grid (50).

6. A method for producing a security document (1) according to claim 5,

characterized in that the picture elements of a respective type have a base color of a color system.

7. A method for producing a security document (1) according to claim 5 or 6, characterized in that the graphic information (4) is formed in color and under the at least two preferential detection directions (65, 66) in each case a color separation of the graphic information (4) detectable is.

8. A method for producing a security document (1) according to one of

Claims 5 to 7, characterized in that the lenticular grid (50) is introduced into the back (10) by means of ultrasonic embossing.

9. A method for producing a security document (1) according to one of

Claims 5 to 8, characterized in that the graphic information (4) is printed by means of a printing process on the front side (9) or a surface of a substrate layer (42) which is laminated with other substrate layers to the document body (2).

10. Verification procedure for a security document (1) according to one of the

Claims 1 to 4, characterized in that under a supervisory view of a front side (9) of the document body (2) the graphic information (4) is detected and evaluated and additionally under at least two

predefined preferred detection directions (65, 66) with respect to the rear side (10) of the document body (2) a viewing of the graphical information (4) by the lens grid (50) on the back (10) of the document body (2) is made, and checked whether among the at least two Advantage detection directions (65, 66) only the pixels of a type (5, 6) are detected and, if this is the case, a Verifikationsentscheidung optionally additionally depending on the evaluation of the graphical

Information itself is like.