DE102012215475A1 - Security document with multicolor and two-sided security feature - Google Patents

Abstract

The invention relates to a security document (1) and a method for its production and a verification method. The proposal is for a security document (1) comprising a document body (2) with a front side (9) and an opposite rear side (10), the document body (2) being transparent for viewing through transmitted light in at least one window area (3), and with or in the document body (2) in the window area (3) graphical information (4) that can be perceived when viewing the front side (9) from above is stored, the graphical information (4) being formed by means of at least two types of picture elements (5, 6) with each of the at least two types of picture elements (5, 6) being assigned a picture element grid (15, 16) having grid positions and the picture elements (5, 6) of one type only at grid positions (25, 26) of the picture element grid assigned to the type ( 15, 16) are arranged, and wherein the image element grids (15, 16) have mutually corresponding grid locations (25 ', 26') which are adjacent to each other in the document body (2) art are arranged, wherein on the back (10) of the document body (2) a lens grid (50) is formed and wherein the image element grid (15, 16) are designed and arranged to each other and relative to the lens grid (50) that at least two There are preferred acquisition directions (65, 66) with respect to the rear (10) of the document body (2), among which only the image elements of one type (5, 6) of the graphic information (4) can be recorded through the lenticular screen (50).

Description

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, driver's licenses, identification cards, visas, but also counterfeit-protected labels and packaging, as well as other types of value documents such as banknotes, stocks, securities, to name just 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. In a passport, such individual information is, for example, a name, a date of birth, a place of residence or biometric data such as a face image, a fingerprint or the like. Individual information associated with a person is also referred to as personal information. The process of putting personal information into a security document is also referred to as personalization.

In addition to such individual or personal information in security documents of a class, for example, a passport of a state, usually additionally formed a variety of other security features that complicate an imitation, falsification, duplication and the like and / or make impossible and in addition a verification of the document as a real document. These are thus usually for all documents of this class, i. for example, for all passports of a state, the same. These security elements are usually integrated into the security document in a central security document production. 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 one security document blank is produced in the central production, which is then subsequently customized or personalized centrally or decentrally with individual and / or personal information.

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 methods for printing information on an otherwise completed or largely completed security document blank offer. 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 secure the stored information with respect to authentication with respect to authenticity. Even with information stored centrally in a document body, which can be stored, for example, in the interior of the document body by printing on a substrate layer which is laminated with further substrate layers to the document body, protection against manipulation is desirable.

The invention is therefore based on the technical object of providing an improved security document, a method for its production and a verification method which do not have or reduce the disadvantages known from the prior art.

The invention is based on the idea of storing personalizing and / or individualizing information, if appropriate also non-individualizing and / or non-personalizing information, 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 picture element rasters are matched to one another such that a corresponding raster point of another picture element raster corresponds to each raster point of the picture element raster. The corresponding grid locations of the pixel grid are adjacent to each other in the security document. Preferably, the grid locations of the different image grids are laterally offset relative to one another with respect to a document surface, ie, they are not arranged 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. With regard both to the arrangement and the raster configuration, the lenticular grid is adapted so that at least two preferential detection directions exist for detecting the graphic information through the lenticular from the back of the document body, under which only the pels of one type are perceptible.

The graphical information is preferably colored in that monochrome picture elements of a color system are used to generate the graphic information. If, for example, cyan, magenta and yellow-colored picture elements are used, it is possible in each case to generate pixels of any desired color impression of the CYM color system from in each case three grid positions which are assigned to one another. 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 picture element rasters so that, under different detection directions through the lenses, only the picture elements of one type, i. in this example of a base color of the color system are detectable. Thus, among the different preferred detection directions, consideration is given to optically capturing the graphical information through the back of the security document, i. through the lenticular, color separated excerpts of the stored graphic 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. If, after delamination, manipulation of the graphic information, and reassembly, an entire pixel grid is shifted from the lens grid, no pixels of the expected type are discernible under the one preferential sense 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 feature, which identifies a type of picture elements, is a color associated with the picture element of that 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 raster points. 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 raster points which have a minimum distance from one another. 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 determination for a spatial direction is made, as follows the next 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 printing processes known in the security document field are understood. These include, for example, inkjet printing, retransfer printing, D2T2 printing, offset printing and other printing methods.

As lenses, all those surface structures are considered which, due to the geometric shape of an interface between media of different refractive index, have an imaging property for light caused by a refraction of light.

Preferred embodiments

In particular, a security document is provided which comprises a document body having a front and an opposite rear side, wherein the document body is transparent at least in a window area for a review, and wherein on or in the document body in the window area in a plan view of the Visible graphic information is stored, wherein the graphical information is formed by at least two types of picture elements, wherein each of the at least two types of picture elements is assigned a raster having pixel raster and the picture elements of a type are arranged only at raster positions of the pixel raster associated with the type, and wherein the picture element rasters have corresponding raster points which are arranged adjacent to one another in the document body, it being provided that on the rear side of the document body a lenticular grid is formed, wherein the pixel emitters are formed and arranged relative to one another and the lenticular grid such that at least two preferential detection directions exist with respect to the rear side of the document body, under which only the picture elements of one type of graphical information can be detected through the lenticular grid.

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.

Furthermore, a method for producing a security document is provided, comprising the steps of: producing a document body, which is transparent at least in a window area between a front side and a rear side of the document body, storing a graphic information perceptible in the area of the window on the front side when viewed from above Front side or in the document body, wherein the graphic information is formed by at least two types of picture elements, wherein each of the at least two types of picture elements is associated with a raster-containing picture element grid and the picture elements of a type are arranged only at grid locations of the pixel matrix associated with the type and wherein the Bildelementeraster have corresponding grid locations which are arranged adjacent to each other in the document body, wherein at the back of the document body a lenticular grid au and the picture element rasters are formed and arranged relative to each other and relative to the lenticular array such that at least two preferential detection directions exist with respect to the back side of the document body, under which only the picture elements of one type of graphic information can be detected through the lens raster. Such a security document can be verified, for example, with a method in which the graphic information is detected and evaluated under a supervisory view of a front side of the document body and additionally under at least two predefined preferred detection directions with respect to the back of the document body viewing of the graphic information by the lenticular grid 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 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.

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 array often deviates in terms of a dimension of the cell structure, but 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 can be made, which are aligned with each other, joined together to the document body, for example, laminated together. A particularly good lateral alignment of the individual picture elements of the different types, ie the different picture element frames to one another, is obtained if the picture elements of different types are printed either on the same substrate layer surface or on different surfaces of the same substrate layer.

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 pixels are each formed at raster locations of the pixel raster associated with the type. 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 provide other surface treatment methods, such as ablation techniques, particularly laser ablation techniques, to introduce the lenticular array into the back of the document body.

In other embodiments, it may be provided that the graphic information is stored in the document body only after the formation of the lens grid. 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 graphic information and thus also the lenticular grid have a greater lateral extent in relation to a predetermined nominal viewing distance or a nominal viewing position, parallax errors occur when the graphical information is optically detected by the lenticular grid. In one embodiment, it is therefore provided that the spacings of the grid locations of the pixel grid and / or the lens grid vary at least along a spatial direction in order to take account of parallax in the acquisition of the graphic information from a target detection position and to compensate for parallax errors.

In yet another embodiment, the pixel grid and / or the lenticular grid having a cell structure are formed such that an extension of the cells of the pixel grid and / or the cells of the lens grid are varied along at least one spatial direction to provide parallax for one Stereo detection of a target position for at least one of the at least two preferential detection directions to be considered. 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 grid and the pixel grid are aligned and arranged to tilt about a plane lying in the plane of the security document which is oriented perpendicular to the line connecting the eyes, so that viewing under 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:

1 a schematic plan view of a security document;

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

2 B a schematic sectional view through a security document with internally stored graphical information;

3 a schematic representation of a detected view under a first preferential detection direction;

4 a schematic representation of a captured under another preferred detection direction mapping of the security document according to 1 ;

5 a schematic representation for explaining the verification of a security document;

6 a schematic representation for explaining a method for producing a security document.

In 1 schematically is the top view of a security document 1 shown. This includes a document body 2 , which is preferably made of different substrate layers based on plastic. However, embodiments are also possible in which the document body consists of a monolithic plastic block. The document body 2 is designed so that in a window area 3 a see-through from a front side 9 which faces the viewer, to a rear side facing away from the viewer is possible. For example, the document body 2 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 side 9 or inside the document body 2 is a graphic information 4 saved. This is made up of picture elements of a first type 5 and picture elements of a second type 6 educated. The picture elements of the first type 5 are at grid locations 25 an associated pixel grid 15 arranged. Accordingly, the picture elements are of the second type 6 only at grid points 26 a second picture element grid 16 arranged. The picture element grid 15 and the picture element grid 16 thus have arranged at regular intervals raster points 25 respectively. 26 on. To every grid location 25 , For example, the grid point 25 ' , there is a corresponding raster location, for example 26 ' of the other picture element grid. These are in the document body 2 arranged 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 on. Indicates a grid location 25 a picture element grid 15 to several grid points 26 another picture element raster 16 the same distance, then a direction, which here by means of the arrow 31 is indicated, fixed to adjacent grid locations 25 ' . 26 ' set. 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 in terms of at least one visually perceptible property, for example, their color. In this case, the picture elements of the same type each have the same optical property. In the illustrated embodiment, only picture elements of the first type are included 5 and a second type 6 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 rasters. 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. At the back 10 , which in the view after 1 facing away from the viewer are in the window area 3 formed in a lenticular lens or lens elements arranged. These are adapted to the picture element rasters and the picture elements formed at the raster points in such a way that there are at least two preferential detection directions for optical detection with respect to the rear side, among which the graphic information 4 are detectable through the lenses of the lens grid in such a way that under one of the preferred detection directions only the pixels of a pixel 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 looking at the front or the top in the case of transmitted light viewing from the front, the graphic information 4 perceives in full color, when viewing the backside from one of the preferential detection directions, only the part of the graphic information formed by means of one type of picture elements can be detected. Preferably, therefore, one obtains different color separations of the graphic information 4 ,

In 3 and 4 the two views are shown schematically, which can be seen under the two preferred detection directions of the security document 1 detected.

In 2a is a schematic sectional view through a window area 3 a security document 1 shown. In the illustrated embodiment, the picture elements are 5 . 6 on the front side 9 of the document body 2 formed, for example, from different substrate layers 41 . 42 is joined together. On the bottom 10 of the document body 2 are lens elements 51 to recognize that according to a lenticular grid 50 are arranged, which adapted to the Bildelementeraster 25 . 26 is educated and oriented. Also entered are the two preferred detection directions 65 . 66 , among which, for example, the in 3 and 4 represented views of the security document 1 are detectable.

In 2 B is a schematic sectional view of a modified security document 1 in the area of the window area 3 shown. In this embodiment, the document body is 2 from three substrate layers 41 to 43 educated. An uppermost substrate layer 41 serves as a cover layer. A middle substrate layer 42 , which is formed of a transparent and, for example, laserable material is on a top side with the graphic information 4 , which by means of the picture elements 5 . 6 is formed, printed. A lowest substrate layer 43 is with the top and middle substrate layers 41 . 42 to the document body 2 laminated together. Preferably, the substrate layers 41 to 43 all based on the same polymer, so that they become particularly well-suited to a document body in a lamination process 2 put together. In addition, all substrate layers are preferably 41 to 43 transparent.

At the back 10 of the document body 2 are again lens elements 51 in the lenticular grid 50 formed, through which out of the preferred sense directions 65 . 66 each of the picture elements of one type of graphic information 4 are detectable. In the illustrated embodiment according to the sectional drawings of 2a and 2 B For example, the lens elements may be cylindrical lenses. But equally well, spherical lenses can also be arranged in a regular grid. In another preferred embodiment, hexagonal lenses are used, which allows a separation of full color graphic information into the different color separations. 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 compensation takes place in such a way that stereoscopic detection, as performed, for example, by a human observer, is possible parallax-free for the individual image elements of the different types under different preferential viewing directions.

In 5 is a schematic perspective view of a window area 3 a security document 1 with a security document body 2 shown. The same technical features are provided in all figures with the same reference numerals. The graphic information 4 is again using picture elements of two types 5 . 6 educated. Adapted to this are lens elements 51 in a lenticular grid 50 arranged so that two preferential viewing directions 65 . 66 in this case symmetrical to a surface normal 70 the back 10 of the document body 2 exist. The lenses 51 of the lenticular grid 50 are formed, for example, as cylindrical lenses. An axis of rotation 71 , which runs parallel to a longitudinal axis of the cylindrical lenses, can as a rotation axis for the document body 2 used for a fixed viewer the security document 1 to tilt so that he alternately turns the security document from the back 1 under the first preferred detection direction and the second preferred detection direction. Schematically indicated are the two captured views for the two different preferred detection directions. If the document is executed correctly and not manipulated on it, then under the one preferred direction of detection 65 only the picture elements of one type 5 (full circles) and the preferential detection direction 66 only the 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 becomes "mirror image" of the graphic information 4 detected. On the other hand, consider the security document 2 from the front 9 , so you completely captures the graphic information 4 , for example, full color. This is up in 5 indicated.

Based on 6 intended to produce a security document 1 briefly explained schematically. 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 becomes the graphical information 4 using first picture elements 5 and second picture elements 6 printed. The first picture elements 5 are each only at grid locations 25 a first pixel grid 15 educated. Accordingly, the picture elements are of the second type 6 only at grid points 26 a second picture element grid 16 educated. Due to the small dimensions of the picture elements 5 . 6 it is irrelevant that the picture elements only at the grid locations 25 . 26 can be arranged, the their associated Bildelementeraster 15 . 16 "To belong".

After application, in particular printing of the graphic information 4 on the middle substrate layer 42 , the different substrate layers become 41 to 43 layered and to a document body 2 connected. This is preferably done in a high pressure, high temperature lamination process. Subsequently, in the document body 2 trained graphic information 4 by means of an optical detection device 90 captured and the document body 2 with the graphic information 4 with respect to a sonotrode 91 an ultrasonic embossing device 100 aligned. Once the sonotrode 91 concerning the graphic information 4 is aligned correctly, by means of an ultrasonic preprocessing the lenticular grid 50 in the back 10 of the security document 1 , ie the document body 2 , impressed. You get a security document 1 in which over the front 9 the graphic information is completely optically detectable. Under at least two preferential detection directions 65 . 66 are in the window area 3 through the lenticular grid 50 through only the picture elements of one type 5 or 6 the graphic information 4 detectable.

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, other cells, on whose characteristic corner points in each case raster points are formed, can be selected in order to form corresponding image element rasters or lenticular grids.

LIST OF REFERENCE NUMBERS

1

The security document

2

document body

3

pane

4

graphic information

5

Picture elements of a type

6

Picture elements of a different type

9

front

10

back

15, 16

Pixel grid

25, 26

grid positions

25 ', 26'

corresponding grid locations

31

arrow

41-43

substrate layers

50

lenticular

51

lens elements

65, 66

Preferential detection directions

70

surface normal

71

axis of rotation

90

optical detection device

91

sonotrode

100

Ultrasonic embossing device

Claims (10)

Security document ( 1 ) comprising a document body ( 2 ) with a front side ( 9 ) and an opposite rear side ( 10 ), the document body ( 2 ) at least in one window area ( 3 ) is transparent to transmitted light, and wherein on or in the document body ( 2 ) in the window area ( 3 ) one in a top view of the front ( 9 ) perceptible graphical information ( 4 ), the graphical information ( 4 ) by means of at least two types of picture elements ( 5 . 6 ), wherein each of the at least two types of picture elements ( 5 . 6 ) a raster ( 25 . 26 ) ( 15 . 16 ) and the picture elements ( 5 . 6 ) of a type only at raster locations ( 25 . 26 ) of the pixel matrix assigned to the type ( 15 . 16 ) are arranged, and wherein the Bildelementeraster ( 15 . 16 ) corresponding raster points ( 25 ' . 26 ' ) contained in the document body ( 2 ) are arranged adjacent to each other, characterized in that on the back ( 10 ) of the document body ( 2 ) a lenticular grid ( 50 ), wherein the picture element rasters ( 15 . 16 ) are formed and relative to each other and relative to the lenticular grid ( 50 ) are arranged such that at least two preferential detection directions ( 65 . 66 ) with respect to the back ( 10 ) of the document body, under which by the lenticular grid ( 50 ) through only the picture elements ( 5 . 6 ) of a type of graphical information ( 4 ) are detectable. Security document ( 1 ) according to claim 1, characterized in that the picture element rasters ( 15 . 16 ) and the lenticular grid ( 50 ) have a cell structure, wherein extensions of the cells of the pixel grid ( 15 . 16 ) and / or the cells of the lenticular grid ( 50 ) vary along at least one spatial direction to provide parallax in detection the graphical information from a Sollerfassungsposition to take into account. Security document ( 1 ) According to claim 1 or 2, characterized in that the variation of the extent of the cells of the picture elements grid ( 15 . 16 ) and / or the cells of the lenticular grid ( 50 ) are performed along the at least one spatial direction so that a parallax for a stereo detection of a target position for at least one of the at least two preferential detection devices ( 65 . 66 ) is taken into account. Security document ( 1 ) according to one of claims 1 to 3, characterized in that the picture elements of a type ( 5 . 6 ) have the same optical property. Method for producing a security document ( 1 ) comprising the steps of: producing a document body ( 2 ), which at least in one window area ( 3 ) between a front side ( 9 ) and a back ( 10 ) of the document body ( 2 ) is transparent; Storing one in a top view of the front ( 9 ) perceptible graphic information ( 4 ) in the window area ( 3 ) on the front side ( 9 ) or in the document body ( 10 ), the graphical information ( 4 ) by means of at least two types of picture elements ( 5 . 6 ), each of the at least two types of picture elements ( 5 . 6 ) a raster-containing pixel raster ( 15 . 16 ) and the picture elements of a type ( 5 . 6 ) only at grid locations ( 25 . 26 ) of the pixel matrix assigned to the type ( 15 . 16 ) and the picture element rasters ( 15 . 16 ) corresponding raster points ( 25 ' . 26 ' ) contained in the document body ( 2 ) are arranged adjacent to each other, characterized in that on the back ( 10 ) of the document body ( 2 ) a lenticular grid ( 50 ) is formed, wherein the Bildelementeraster ( 15 . 16 ) are formed and relative to each other and relative to the lenticular grid ( 50 ) that at least two preferential detection directions ( 65 . 66 ) with respect to the back ( 10 ) of the document body ( 2 ) exist, under which by the lenticular grid ( 50 ) through only the picture elements of a type ( 5 . 6 ) of graphical information ( 4 ) are detectable. Method for producing a security document ( 1 ) According to claim 5, characterized in that the picture elements of each type have a base color of a color system. Method for producing a security document ( 1 ) according to claim 5 or 6, characterized in that the graphical information ( 4 ) is colored and under the at least two preferential detection directions ( 65 . 66 ) each a color separation of the graphic information ( 4 ) is detectable. Method for producing a security document ( 1 ) according to one of claims 5 to 7, characterized in that the lenticular grid ( 50 ) in the back ( 10 ) is introduced by means of ultrasonic stamping. Method for producing a security document ( 1 ) according to one of claims 5 to 8, characterized in that the graphical information ( 4 ) by means of a printing process on the front side ( 9 ) or a surface of a substrate layer ( 42 ) printed with other substrate layers to the document body ( 2 ) is laminated. Verification procedure for a security document ( 1 ) according to one of claims 1 to 4, characterized in that, under a supervision of a front side ( 9 ) of the document body ( 2 ) the graphical information ( 4 ) is recorded and evaluated, and additionally under at least two predefined preferred detection directions ( 65 . 66 ) with respect to the back ( 10 ) of the document body ( 2 ) a consideration of the graphical information ( 4 ) through the lenticular grid ( 50 ) on the back side ( 10 ) of the document body ( 2 ), and it is checked whether, under the at least two preferred detection directions ( 65 . 66 ) only the picture elements of one type ( 5 . 6 ) and, if this is the case, a verification decision, if appropriate, additionally depending on the evaluation of the graphic information itself.

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