EP3423286A1

EP3423286A1 - Security object having a dynamic and static window security feature and method for production

Info

Publication number: EP3423286A1
Application number: EP17708785.5A
Authority: EP
Inventors: Simone Zernicek; Andreas Bosien; Michael Knebel; André LEOPOLD; Uwe Seidel; Ulrich Schneider
Original assignee: Bundesrepublik Deutschland Vertreten Durch Das Bundesministerium Des Innern Vertreten Durch Das Bundeskriminalamt; Bundesdruckerei GmbH
Current assignee: Bundesrepublik Deutschland Vertreten Durch Das Bundesministerium Des Innern Vertreten Durch Das Bundeskriminalamt; Bundesdruckerei GmbH
Priority date: 2016-03-04
Filing date: 2017-03-03
Publication date: 2019-01-09
Anticipated expiration: 2037-03-03
Also published as: ES2748127T3; PL3423286T3; CN109070621B; WO2017149153A1; DE102016203609A1; US20190283482A1; CN109070621A; AU2017228040A1; DK3423286T3; EP3423286B1; AU2017228040B2; US10800201B2

Abstract

The invention relates to a security object (1) having a document body (10), wherein a lens array (300) is formed on a top side (11) and laser-marked first information (410) is stored in the document body, the optical detectability of the first information through the lens array (300) being dependent on the detection direction, wherein the document body (10) comprises a top view section (270), in which the document body (10) has a material layer that is translucent or opaque in volume, and adjacent thereto a window section (280), in which the document body (10) is formed of material transparent in volume between a top side (11) and a bottom side (12), and the lens array (300) extends over part of the window section (280) and over part of the top view section (270) and spans a section boundary (290) between said sections (270, 280), and the first information (410) also is formed partially in the top view section (270) and partially in the window section (280) and, additionally in the window section (280), laser-marked, static second information (420) is stored in the document body (10), wherein the second information (420) is optically detectable through the lens array (300) and through the bottom side (12). The invention further relates to a method for producing a security object.

Description

Security article with dynamic and static window security feature and method of manufacture

The invention relates to a method for producing a security object and a security object.

As a security object, a physical object is here considered which is preferably a document body made of a plurality of materials,

For example, a formed as a lamination body composite body, and at least one falsification, imitation, duplication or the like aggravating or even impossible to make feature.

Security objects are used for example for the production of security and / or value documents or directly as security or value documents. For example, modern passport or personal documents often include one

Security object in the form of a security document body, which on

Plastic base is made. Such a security article is usually made of several layers, such as films, the same or different

Plastic materials produced. Such an article with a security feature is a security object.

To protect against adulteration, unauthorized replicas, duplications and the like, security compounds or security documents have so-called security features. A class of security features shows one

viewing angle dependent optical effect. Such viewing-angle-dependent effects can be generated, for example, by diffractive structures such as holograms or refractive structures.

A subgroup of having an angle-dependent optical effect

Security features include a refractive structure, for example in the form of a lenticular lens, which includes a plurality of lens elements in a lens array, and spaced therefrom an optically detectable information stored in the document body.

From WO 03/022598 A1 a recording medium is known, which has an upper layer, which has on its outside a plurality of lenticular lenses and at the back Has representation element that appears to be movable about at least one axis when tilting the recording medium. The lenticular lenses extend only over a portion of the entire outside. The presentation element is a

Security element printed on an inner card layer. It is not stated how the lenticular lenses are inserted into the document body.

From WO 2005/058610 A2 a data carrier is known in which are introduced by a laser beam markings in the form of patterns, letters, numbers and / or images, 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.

From WO 201 1/051670 A2 a security device with a lens-like device is known, which comprises an array of lens-shaped focusing elements, which is formed over an array of sets of image strips, so that from different viewing directions in each case a corresponding image strip of each sentence on a corresponding lens-shaped focusing element is to be seen, wherein the image strips are at least partially formed as a relief structure.

From DE 10 2008 008 044 A1 a cost-effective method for producing security and / or value documents is known which are suitable for producing flexible and tamper-proof structures with low thermal stress, the surface structure in the top and / or bottom of the Production of documents used substrates with an embossing device having at least one stamping tool, each having a contact surface, using a

Embossing and embossed using ultrasound, the

Contact area is as large as or larger than the top or bottom of the substrate. Embodiments of the manufacturing method are described which impress microlenses in a document body. DE 10 2008 031 653 A1 discloses a method and a device for introducing a security feature into a security document, wherein the security document comprises a document body having at least one thermoplastic surface layer, the method comprising the steps of: providing the security device documents body; Providing and / or creating a structured sonotrode that is or will be coupled to a sound source; Arranging the document body relative to the sonotrode; Contacting the sonotrode and the surface layer of the document body and simultaneous coupling of sound waves through the sonotrode in the value or security document, so that a

Relief structure in the surface layer is formed, wherein the sonotrode with a

Structure is provided and / or manufactured, which has a target receiving ring level and the sonotrode is structured so that from the target entry level

projecting portions and into the target intrusion plane protruding recessed regions exist, the sonotrode is moved during the sound injection by applying pressure in the document body until the target intrusion plane with a

Document body surface target level coincides and the projecting portions recessed relief structures and the recessed areas create protruding relief structures in the surface layer.

From EP 0 216 947 A1 a card-shaped data carrier with a substrate and at least one transparent cover film is known. The substrate is provided with information detectable by the cover sheet using a laser beam, the transparent cover sheet carrying a relief applied at least partially overlapping the information area prior to recording the information, which characteristic changes the information recording by virtue of its optical lens action. Depending on the irradiation direction of the laser light, the information is stored at different locations in the substrate. Similarly, in a visual inspection different information depending on a

Viewing angle perceived.

From EP 0 219 012 B1 a data carrier is known, in which in an inner

Volume range information is introduced by means of a laser beam, which are visible in the form of changes in the optical properties due to an irreversible, caused by the laser beam material change. Described are, for example Card-shaped data carriers which have a lenticular grid on a surface. The lenticular grid can be embossed during a laminating process by incorporating a negative of the lenticular grid into a corresponding laminating plate. Likewise, a thermostable embossing die can be used, which is inserted between the transparent cover layer and the lamination plate. It is further described that the card can be produced by means of a lamination process and the lenticular screen is subsequently introduced by means of an embossing punch or embossing roller. The information is introduced via a laser beam, which introduces information through the lens grid into the card body under different directions. This makes it easy to implement tilt pictures.

There is generally a need to always create novel security features, in particular those which are difficult to manufacture, and thus can not be reworked by counterfeiters or only with considerable effort. Nevertheless, they should be able to be checked easily and reliably, preferably without further aids, for their presence and / or their authenticity and integrity.

The invention is therefore based on the technical object of providing a method for producing a novel security object and a novel security object which comprises a viewing angle-dependent security feature, and is more difficult to produce than known from the prior art

Security objects, in particular in the form of security document bodies designed as composite bodies.

The invention is based on the idea of a security object with a

Document body having a window portion in which the document body is made of transparent material in the volume. In addition, the document body has a viewing section in which a view through the document body is prevented by a volume-translucent or opaque material layer. This supervision section adjoins directly to the window section. Between the upper side and the translucent or opaque material layer, the document body in the supervisor section is transparent in volume, so that graphic information formed on the translucent or opaque material layer or information stored in the volume between the translucent or opaque material layer and the upper side is viewed through the top are detectable. A novel security element comprises a lens array which extends both over at least a portion of the window portion and over at least a portion of the overhead portion and thereby spans a section boundary between the viewing portion and the window portion. In the document body, a laser-marked and detection-direction-dependent first information, which is stored in the document body via first irreversible material changes, is formed partly in the supervision section and partly in the window section. In addition, in the window portion a laser-marked and static second information on second irreversible material changes stored in the document body, wherein the second information is optically detectable by the lens array on or in the top of the document body as well as by the bottom of the document body as static information. This means that the second information is independent of the

Viewing direction relative to the top of the document body through the top as well as regardless of the Bertachtungsrichtung relative to the bottom of the

Document body is detected accordingly by the bottom. Since optical detectability is independent of the viewing direction, this second information is referred to as static information.

Such a security article is preferably made by a method comprising the steps of: providing or fabricating a planarized document body having a top side and an opposite bottom side, wherein a lens array is formed on or in the top, and storing a first one Laser-marked detection direction-dependent information by radiated through the lens array from one direction spatially modulated light and in focus areas of the lenses of the first lens array first irreversible material changes are effected. It is intended that the

A document body having a viewing portion in which the document body has a translucent or opaque material layer between the top and bottom of the document body, and having a portion adjacent to the top portion

A window portion in which the document body is formed of volume-transparent material between the top and bottom of the document body and prepared or manufactured with the lens array, the lens array extending over at least a portion of the window portion and at least a portion of the viewing portion extends and thereby a section boundary between the

Surveillance section and the window section spans, and storing the first Information is executed so that the laser-marked and

Detection direction-dependent first information is partially formed in the supervision section and partially in the window portion, and additionally in the window portion through the bottom of the document body further spatially modulated light is irradiated and a static second information on the second irreversible

Material changes in the document body is laser-marked and stored, wherein the second information through both the lens array on or in the top of the

Document body as well as through the bottom of the document body can be visually detected as static information. The thus created security object with a document body or in the form of a security document body provides an easy-to-verify security feature. On the one hand there exists a first piece of information which can be detected or can not be detected depending on the viewing direction and additionally a second piece of information which, both when viewed through the top side and when viewed through the bottom side, is static in each case. independent of direction, can be recognized.

Such a security object is difficult to falsify for the very reason that in a volume translucent or opaque material layer with a volume

transparent material filled window is to be incorporated. In addition, the first information is to be designed in such a way that it covers both the window and the window

Supervision section extends. In addition to this, the second information is to be integrated into the document body as static information.

definitions

A security object is a physical entity that has at least one security feature that makes it difficult or impossible to imitate, unauthorize duplicating, tampering or the like, or that allows checking the authenticity and integrity of the security object. One

The subject of security may be a security document such as an identity card, driver's license, identification card, bank card, etc. Likewise, a security object may also be a semi-finished product, for example a passport card, which is or will be inserted into a security document, for example a passport. When expanded flat is considered a body whose top and bottom have an extension which is substantially greater than a distance of the opposite top and bottom. This means that a side edge or a straight line bisecting the surface of the top exists, which are longer than a distance of the top and bottom of each other. Especially common

Security document formats, such as ID1 and ID3 formats, provide extensively extended document bodies. All card-shaped common security document bodies are extensive document bodies.

As transparent, a material is referred to, through which a light propagation according to the geometric appearance is possible. This means that in the volume of the material no appreciable diffuse scattering takes place, but the light propagates in a straight line in the volume according to the classical optics. A bulk transparent material may also be included so that the above property is not for all wavelengths in the visible spectral range. However, for at least one wavelength range, the above property must be present. Window glass or too

uncoloured plastics of polycarbonate, polyethylene, PVC or others

Thermoplastic plastics may be formed as bulk transparent materials.

As the translucent in volume, a material is referred to, in which a rectilinear propagation of light, as would be done according to the geometric optics, is prevented by a diffuse scattering in the volume.

As opaque, a material is referred to, which is for light in the visible

Wavelength range attenuates a transmission of light significantly. Overall, this property depends on a layer thickness of the opaque material. As an example, typical 80 g / m ² paper, dyed in volume

Plastics, reflective metal layers and the like viewed. All layers which attenuate a transmission of light in the light-building wavelength range at a layer thickness of 10 μηι by at least 50%, are considered to be opaque with absorbing

Viewed colorants.

A lens array is an arrangement of a plurality of lens elements. Preferably, a lens array consists of similar lens elements. It is, however Also possible embodiments in which the individual lens elements are formed in groups or individually different. Preferably, a lens array has a plurality of parallel aligned and directly adjacent to each other

adjacent cylindrical lens elements.

As an irreversible change in material here a change in the volume of the document body is considered, which is optically detectable, especially for a human, but also for an optical detection device such as a digital camera.

Preferably, irreversible material changes are formed as blackening or differently designed scattering centers in volume-transparent material.

A viewing direction or irradiation direction, which relates to a document body, is defined or specifiable by a solid angle relative to the surface normal of the top of the document body and to the surface normal of the underside of the document body, respectively.

As a supervision section, a portion or area of a document body is referred to on the top or bottom, in which a view through the

Document body is prevented by at least one arranged in the document body opaque or translucent material layer and in which when viewed in

Only the information can be detected in a transparent material between the upper side or lower side and the at least one translucent or opaque material layer or on the upper side thereof.

Bottom facing surface are arranged. If the document body comprises a plurality of translucent or opaque material layers, then the respective material layers facing the top side or bottom side are definitive and limit the material layers

Memory area of the information that can be recorded in supervision.

As the window portion that portion is considered relative to the top of the document, in which a view through the document body due to the formation of transparent in the volume material between the top and the bottom of the document body is possible.

A document body is a physical object provided for forming a security document. If this one has a security feature, then it will too referred to as security document body. Since the document bodies described here are intended for a training of a security object, in some places also a security document body is spoken of without explicitly addressing a security feature. Since document body usually have a variety of security features, is also in some places by a

Security document body spoken in which the or here explicitly

described security features are not fully developed. One

Security document body is then used as a synonym for a document body. The substrate layer is an independently manageable layer. A film of plastic material is called a substrate layer. The layers from which a lamination body is assembled are referred to herein as substrate layers.

As a material layer here is a layer with substantially uniform

Material properties in a document body called. In general, one is

Material layer emerged from a substrate layer during the lamination process. Thus, there is usually a correspondence of a material layer with a pre-lamination substrate layer. For the purpose of this correspondence, the terms substrate layer and material layer can be used as synonyms.

Preferred embodiments

In particular, a security object with a widespread

Document body provided, which has a top and an opposite bottom wherein in the top of the document body, a lens array is formed and in the document body a laser-marked and Erfassungsrichtungsabhängige first information about first irreversible material changes is stored in the document body whose optical detectability through the lens array of a

Detection direction is dependent, wherein the document body a supervisory portion in which the document body between the top and the bottom of the

Document body has a translucent or opaque material layer in volume, and adjacent to the supervisor portion comprises a window portion in which the

Document body is formed from in volume transparent material between the top and the bottom of the document body, and the lens array, both at least over a portion of the window portion and at least over part of the Supervisor extends and thereby a section boundary between the

Surveillance portion and the window portion spans, and also the laser-marked and Erfassungsrichtungsabhängige first information is partially formed in the supervision section and partially in the window portion and additionally in the window portion a laser-marked and static second information on the second irreversible

Material changes is stored in the document body, wherein the second information is optically detectable both through the lens array on or in the top of the document body and through the underside of the document body.

Further, there is provided a method of manufacturing a security article comprising the steps of:

Providing or producing a flat-expanded document body having a top and an opposite bottom, wherein on or in the

Top side of a lens array is formed or is formed, and

Storing first laser-marked detection-direction-dependent information by irradiating spatially modulated light from one direction through the lens array and causing first irreversible material changes in focal areas of the lenses of the lens array,

wherein the document body is provided with a planer portion in which the document body has a translucent or opaque material layer between the top and bottom of the document body, and a window portion adjacent to the top portion, in which the document body is of volume transparent material between the top and the underside of the document body is formed and prepared with the lens array, wherein the lens array extends both at least over a portion of the window portion and over at least a portion of the viewing portion, and thereby

Spans the boundary between the supervisor portion and the window portion, and storing the first information is performed so that the

Laser-marked and registration-dependent first information partly in

Supervision section and partially formed in the window portion and additionally in the window section through the bottom further spatially modulated laser light is irradiated and a static second information on the second irreversible

Material changes in the document body laser-marked and stored, the second information through both the lens array at or in the top of the Document body as well as through the bottom of the document body is optically detectable.

The second information is independent of the lens array

Viewing direction detectable.

It has proved to be advantageous to select the first and the second information in such a way that they complement one another to provide overall information. As a result, the individual information can be protected by the other information.

In one embodiment, it may be provided that the second information comprises a letter, a letter sequence, a word, a digit or a number sequence which, inserted into the first information, supplies the overall information.

Preferably, the total information has a meaning that for a

human observer or a verification device is recognizable and only from the combination of the first information and the second information for

Total information results.

The second information can also be derived from the first information. For this example, a scatter value function (hash value function) or the like may be desired. With knowledge of the scatter value function, the second information can be calculated from the first information. It can thus be checked whether the first information and the second information about the scattering value function are correctly "linked together." If this check is negative, a forgery can be deduced.

In order to facilitate the verifiability of the overall information, it is provided that the total information in addition to the first information and the second information respectively stored about irreversible material changes in the document body is stored in the document body for reference purposes as reference information. This storage can be carried out for example by printing. It is also possible to electronically store this information in a microchip integrated in the document body or in a hologram or the like. The document body is at least partially, preferably formed as a whole as a lamination body. This is produced by joining several substrate layers together in a substrate layer stack and bonding them together by introducing energy in a lamination step, wherein in the substrate layer stack a volume translucent or opaque substrate layer is formed, which forms the translucent or opaque material layer of the document body, being transparent or opaque in volume

Substrate layer in a region corresponding to the window portion having a recess which is filled before or during the lamination step with a transparent material. The individual substrate layers used can be laminated with other security features, in particular with

Security imprints or perforations or the like.

Preferably, the lens array is impressed on or in the surface of the document body during the lamination step by means of a laminating sheet in the top of the lamination body.

Alternatively, the formation of the lens array by means of an embossing with a

Ultrasonic sonotrode or otherwise, for example by means of laser ablation, done after lamination.

In order to facilitate the laser marking and to be able to locate the irreversible material changes well, a laser-sensitive transparent material layer is preferably formed in the document body, in whose volume the focus positions of the lens elements of the lens array are located. A laser-sensitive material layer consists of a transparent material which contains substances which promote laser absorption locally without appreciably impairing the transparency. This means that blackening occurs in laser-sensitive layers with a lower energy density of the registered laser light than with non-laser-sensitive layers which otherwise consist of identical plastic material.

In a further development of the invention, the document body is different, preferably different, from the one or the first laser-sensitive material layer

spaced, further or second laser-sensitive material layer. This is located between the first laser-sensitive material layer and the bottom of the Document body. Particularly preferably, this is arranged between the underside and the translucent or opaque material layer. In such a

Embodiment, the second static information is preferred in the second

laser-sensitive layer marked.

If the first and the second laser-sensitive layer in the document body are spaced from one another, it can be seen that the first information and the second information are at least when tilting the document body or otherwise changing the detection direction by looking closely at the first information and the second information Information is not stored in the same level. As a result, another difficult to emulate effect is created, the

Verification of the authenticity of the document body or security object

can be used.

Only if it can be determined that the first and the second information are stored in different levels of the document body is a

Document body verified as real in this embodiment.

Particularly preferably, the first and the second information are coordinated so that the second information is spatially arranged relative to the first information so that the total information can be detected correctly. For example, the total information may consist of an alphanumeric string, wherein at least one character in the middle of the string is formed by the second information. For verification, the correct alignment can be achieved both in terms of the spacing of the characters from one another along the string, i. in reading direction, as well as a correct orientation of the character formed by the second information across the reading direction relative to the remaining characters as well as a character size, etc. are used for verification.

Embodiments in which the second information or at least one component of the second information have proven to be particularly difficult to falsify

For example, at least one alphanumeric character is arranged immediately adjacent to a section boundary between the supervisory section and the window section. Here, a distance of the component of the second information from the Distance limit preferably less than a mean character width of the one

Character string of the total information forming alphanumeric characters.

In particular, when a center of the lens array does not coincide with an axis of symmetry of the front surface of the document body and an irradiation direction of the laser radiation used for storing the directional first information is determined by tilting the document body about an axis coincident with such an axis of symmetry of the document body, it is necessary to match the graphical information imparted to the laser light by spatial modulation according to the distance of the lens array from the tilt axis of the document body and the tilt angle to the distortion caused thereby to a planar projection on the top of the document body.

Since the imprinting of the lens array as well as the concrete position of the section boundary may vary due to manufacturing tolerances and handling tolerances of the document body at the marking, in a preferred embodiment it is provided that a position of a section boundary between the window section and the supervisory section relative to a reference unit of a marking device is determined and the spatial modulation and / or positioning of the irradiation of the first laser light is carried out on the basis of the determined position of the section boundary. The determination of this section boundary is also crucial for the introduction of the second information.

In general, however, the document body is reversed by the underside before marking. In order to know the position of the section boundary precisely, in a preferred embodiment the section boundary is detected again before the introduction of the second information and is used for the spatial modulation and / or

Positioning of the laser light for introducing the second information, the results of the second determination of the position of the distance limit used.

For the introduction of the first information is in a development of the invention, which causes an even more precise reproduction of the first stored information, in addition, the position of the lens array relative to the reference unit of

Marking device determined. This is preferably done by capturing an image of the top of the document body, for example by means of a digital camera, while the top is illuminated with light under grazing incidence. In the captured image, the area of the lens array is well recognizable by contrast with the surrounding surface of the top.

A determination of the position of the section boundary is preferably carried out by detecting an image of the document body from the top or from the bottom of the document body, preferably in direct plan view, wherein each illumination is from the opposite side of the document body, so that a transmitted light image is detected. The section boundary can be detected as a contrast limit in the figure. The detection device provides, for example, the

Reference device of the marking device. Relative to this, the laser is preferably arranged rigidly.

Further advantages of the invention will become apparent from the following description of the figures. Hereby show:

Fig. 1 is a schematic sectional view through a security document

trained security object;

Fig. 2 is a schematic plan view of a trained as a security document

Security item;

Fig. 3 view from a viewing direction through the top of as

trained security document security object;

Fig. 4 further embodiment of a trained as a security document

Security object;

Fig. 5 representation of a schematic preparation of a

Security object;

Fig. 6,6a are schematic representations of the situation for marking the first

Information; Fig. 6b tilting of the document body by an angle -Θ with respect to

Light emission direction with the top to mark a third

Information;

Fig. 6c is a schematic representation of the marking of the second information; and

Fig. 7a to 7d are schematic views of trained as a security document

Security object.

FIG. 1 schematically shows a sectional view through a security object 1 designed as a security document 2. The security document 2 comprises a document body 10. This is in the illustrated embodiment as

Lamination body 100 is formed. The document body 10 has an upper side 11 and an opposite lower side 12. The document body 10 is flat

formed, which means that an edge length 30 of the top 1 1 greater, preferably by an order of magnitude greater than a distance between the top and bottom, i. a document body thickness is 40.

This is equivalent to the fact that a surface of the top 1 1 and a surface of the bottom 12 have an extension along one direction, for example, the edge length 30 or a straight area bisecting, the larger, preferably by at least an order of magnitude greater than the document body thickness 40th is.

The document body 10 is formed in the illustrated embodiment from the top 1 1 to the bottom 12 of five layers of material in a

Lamination method are joined to the lamination body 100. From the upper side 11 to the lower side 12, these are a transparent material layer 110, a first laser-transparent material layer 120, an opaque material layer 130 with a recess 135 which is filled with a transparent material 136, a second laser-capable substrate layer 140 and a further transparent Layer 150. Other embodiments may include a different number of layers of material. It is essential that at least one material layer in the volume is opaque and this has a recess which is filled with a transparent material. In this Area or section all above and below arranged material layers are transparent in volume.

The document body 10 has a window portion 280 in which all

Material layers 1 10 to 150 between the top 1 1 and the bottom 12 are all formed transparent in the volume. In addition, the document body 10 has a supervisory portion 270 in which a material layer, in the illustrated

Embodiment, the material layer 130 is formed opaque in volume. in the

Supervision section 270 can thus be detected on viewing or optical detection of an image of the document body 10 through the top 1 1 only that information on or above the opaque material layer 130 in

Supervisor portion 270 is stored. In the window section 280, however, information is also recorded, which are stored in the entire volume between the top 1 1 and the bottom 12 in the region of the window portion 280. Of the

Window portion 280 and the supervisor portion 270 adjoin one another

Section boundary 290 immediately adjacent to each other.

The document body 10 further includes a microlens array 300 having a plurality of lens elements 310. In the illustrated embodiment, the lens array 300 has a plurality of similarly formed cylindrical lens elements 310. The lens array 300 extends to one part 320 via the overhead section 270 and to another part 330 via the window section 280 of the document body. The lens array 300 thus extends over a section boundary 290 between the supervisor section 270 and the window section 280.

The terms upper side 1 1 and lower side 12 are always chosen here with respect to the document body 10 such that the microlens array 300 is formed on or in the upper side 1 1 of the document body 10. The terms do not give any information with regard to a later use. The page which is essential for the use can therefore also serve as the underside 12 of the document body 10.

In the document body 10 is additionally a viewing or

stored detection direction-dependent first information. This storage takes place in the document body 10 via first irreversible material changes 41 1. These are shown schematically in the figure shown by the lower case letter "a". The storage takes place, for example, by irradiating along a direction 601, which also corresponds to a viewing direction for recognizing the first information, the first information through the lens array into the security document.

The material thicknesses of the transparent material layer 110 and the first laser-capable material layer 120 are preferably selected such that focus positions of the

Lens elements 310 of the lens array 300 in the first laser-sensitive material layer 120 are. When marking, for example, laser light is radiated through a spatial light modulator, which may be formed, for example, as a unit of liquid crystal cells with polarization filters. The spatially modulated light is focused by the lens elements 310 of the microlens in each case in focus positions and chosen in terms of intensity so that irreversible in the focus positions

Material changes, such as blackening, are performed. Since the blackening is effected only in the focus positions, the stored first information can be seen from the first direction 601. When viewed from this direction 601, the blackening formed in the focus points, which correspond to the first information, is reimaged to a viewer. From other deviating directions, however, other areas of the laser-sensitive material layer are shown on which there is no blackening. Thus, the first information is stored in the document body 10 depending on the viewing direction.

In addition, a second information 420 is stored in the document body 10 about second irreversible material changes 421 represented by the capital letter "A." The second information is designed as static information, ie stored in such a way that it can be viewed from all viewing directions through the top 11 This can be achieved by introducing the second information, for example via a laser marking, through the underside 12 of the document body 10. For this purpose, laser radiation is spatially modulated with the second information and focused such that the greatest energy density is preferably in the second laser-sensitive material layer occurs, so that the second information about the second irreversible material changes 421 is stored in the second laser-sensitive material layer 140.

In a preferred embodiment, the first information 410 and the second information 420 are matched to one another such that from the one viewing direction 601, from which the first information 410 can be detected, the first information 410 and the second information 420 supplement to a total information 430. For example, the first information may be "aaa" and the second information is "A". The total information is then "aaaAaaa." Here, the second information 420 provides a part of the total information 430 that is fitted in the first information 410 at a predetermined location. For example, the first information 410 may consist of a sequence of numbers "123 567" and the second Information from the number "4." The total information is then the sequence "1234567". It makes sense, therefore, the overall information is chosen so that it has a meaning that can be easily checked by a viewer. In order to facilitate this, the information content of the overall information may be formed once more for example as a print or laser mark at another location in the security document for reference purposes as reference information 450.

To complicate a forgery, preferably the first and the second

Information positioned so relative to each other that a subsequent falsification of components of the first or second information is easily recognizable.

For example, the first information and the second information are each formed from alphanumeric characters of the same character set and the same font size. The second information comprises one or more alphanumeric characters which, when viewed from the direction 601 from which the first information is detectable, insert into the latter such that the characters are correctly aligned with one another. In each case, the first information 410 always extends over both the supervision section 270 and the window section 280. This means that the first information 410 has components 415 that are stored in the window section 280 and components 416 that are stored in the supervision section 270 , Embodiments in which at least a portion of the second information immediately adjacent to the section boundary 290 is formed to fit into the first information formed across the section boundary 290 are particularly difficult to forge.

FIG. 2 schematically shows a plan view of a security document 2 similar to that of FIG. 1. The same technical features are identified in all figures with the same reference numerals. It is assumed that the first

Information 410 for a vertical view through the microlens array in the Document body 10 is stored. This means that in top view both the first information and the second information are visible. It can be seen that the microlens array 300 is both partially over the supervisor portion 270 and partially over the window portion 280 and spans the portion boundary 290.

Likewise, the first information 410 "123 567" is partially formed in the overhead section 270 and partially in the window section 280, and thus also spans the section boundary 290. The second information 420 "IV" fits into the first one

Information 410 is inserted so that the first information 410 and the second

Information 420 to the total information 430 "123IV567" supplement .. Their

Information content is one more time as reference information 450 in the

Security document stored for example as a laser engraving elsewhere. The reference information 450 could also be formed as an imprint on the opaque material layer. It would also be possible to store this information in a hologram and / or in a chip, which optionally can also be integrated into the security document and are not shown here for reasons of simplification. The Roman notation of number 4 "IV" is chosen here only to indicate that this number is not directionally stored by the subpage as second information 420.

In Fig. 3 is a view from another viewing direction through the top of the security document analogous to that shown in FIG. 2. It can be clearly seen that only the second information and the reference information 450 can be detected. The viewing direction-dependent first information is from this detection or

Viewing direction not detectable.

FIG. 4 shows a further embodiment of a security document 2 with a document body 10.

Same technical features are provided with the same reference numerals.

In this embodiment, the second laser-able material layer is missing, so that the second information 420 is likewise stored in the first laser-able material layer 120. This is done as in the embodiment of FIGS. 1 and 2 by an irradiation of focused laser light through the bottom 12 of the document body 10th FIG. 5 schematically shows the production of a security object 1 in the form of a document body 10 in the form of a lamination body 100. First, substrate layers 210 to 250 are gathered, which correspond to the material layers 1 10 to 150 of the embodiment of FIG. 1. This means that a transparent substrate layer 250, a first laser-transparent substrate layer 220, an opaque substrate layer 230 with a recess 235 as well as these

Recess 235 filling transparent insert 238, a second laserable

Substrate layer 240 and a further transparent substrate layer 250 are collected in a gathering station 1010. In one

High-pressure high-temperature lamination process, the thus formed substrate layers 210 to 250 in a lamination station 1020 to a

Document body 10 assembled, which is designed as a lamination body 100. At the same time or subsequently, the microlens array 300 is embossed into the upper side 11 of the document body 10 formed. The embossing is preferably carried out in such a way that the structuring of the microlenses does not protrude beyond a top plane 21 of the upper side 11, which is defined by those sections of the upper side 11 in which the microlens array 300 is not formed.

Such an embodiment protects the individual lens elements 310 of the

Microlens arrays 300 from damage.

The lamination body 100 thus produced is then placed in a

Marking device 1030 spent. In this, the document body 10 is held in a holder 1 1 10. The marking will be explained with reference to FIG. 6.

The holder 1 1 10 is pivotable about a pivot axis 1 120. The document body 10 is arranged in the holder 1 1 10 so that the pivot axis 1 120 parallel to longitudinal directions of the lens elements 310, which are formed as cylindrical lenses, the microlens array 300 is formed. Since the microlens array 300 is not necessarily formed centrally on the top of the document body 10, the pivot axis 1 120 usually does not coincide with a central axis 350 of the

Lens arrays together. In addition, slight manufacturing tolerances occur in the formation of the window portion and the relative positioning of the

Microlens arrays relative to the window portion or the section boundary. For these reasons, it is for a precise marking of the first information and the second Information necessary to determine a position of the section boundary 290 and the window section 280 relative to the marking device 1030. For this purpose, the

Marking device 1030 a camera 1 130 on. This one is opposite

Transmitted light source 1 140 arranged. The light of this transmitted light source passes through the window portion 280 of the document body 10 and is detected by the camera 1 130. An acquired view shows such a transmitted light view 1 141 of the

Document body 10. Clearly visible are the window portion 280 as a bright area and the supervisory portion 270 as a dark area. As a result, the exact position of the boundary portion 290, which does not necessarily have to be rectilinear, can be determined. In order to determine a position of the lens array 300 relative thereto, a grazing light source 150 is provided. One detected by the camera 1 130

Scattered light view 1 151 shows a clear contrast between the lens array 300 and the remaining surface 14 of the upper side. This makes it possible to determine the location of the

Lens arrays 300 also to determine precisely. The marking process is controlled by a controller 1200.

In Fig. 6a, the situation for marking the first information is shown schematically. In general, the first information which is stored for a viewing direction dependency is stored for a detection direction which does not coincide with a surface normal 13 of the upper side 11 of the document body 10. Therefore, the document body 10 is pivoted in the holder 1 1 10 usually at an angle Θ with respect to a light incident direction 1320. Incident light 1305 of a marker light source 1300, which is formed, for example, as a laser light source, is modulated in a spatial light modulator 1310 according to the first information. As a result, the first information is impressed on the light. Only at every point where an irreversible material change 41 1 is to be induced in the security document, light is transmitted through the spatial light modulator 1310, at other points this is blocked. This results in a graphic representation of the first information, which is decomposed into pixels. This can be in black / white or

be light / dark or in grayscale or brightness levels. Since the

Document body is pivoted by the angle Θ with respect to the light incident direction 1320, it is necessary a distortion and position adjustment for the irradiation of light for marking the first information depending on the determined position of the section boundary 290 and optionally in addition depending on the position of the microlens array 300 and of the angle. In Fig. 6b, the document body 10 is tilted at an angle -Θ with respect to the light incident direction with the top. In this position, a third information is preferably stored in the document body. Thus, in the finished security document, there are two viewing angle dependent information, the first information 410 and the third information 440, which are visible under different viewing directions.

In Fig. 6c, the document body is 180 ° to the light incident direction

pivoted so that a mark takes place through the bottom 12. In this position, the second information 420 is introduced in a positionally matched manner to the first information 410, so that preferably the first information and the second information supplement one another with overall information. The third information can also be like that

be formed, that with the second information to another

Complete information added. The overall information and the further overall information are preferably printed, for example, as printed information, for example on the substrate layer 230 (see FIG. 4) before the lamination, and can thus serve as reference information and further reference information that is available in the finished article

Document body 10 can be seen on the material layer 130 as a print.

In FIGS. 7a to 7d, views of a security document 2 are shown

Security article 1, which are manufactured according to the method described above, shown schematically. When the document body 10 is viewed at an angle Θ from the surface normal 13 of the security document, the first information 410 "123 567" can be detected together with the second 420 "IV" information. This is shown in Fig. 7a. In addition, the first reference information 451

"123IV567" and the second reference information 452 "765IV321" detectable. If the first and second information 410, 420 are not precisely positioned relative to one another, this is visible to a viewer. Manipulations of the first or the second information or a separation of the document body and subsequent re-lamination usually lead to deviations of the relative positioning, so that such manipulations are easily recognizable. A margin distance 550 of the second information 420 from the

Limit section 290 is preferably smaller than a character length 551 of the character string of the first information 410. In Fig. 7b, the view is shown under a viewing direction -Θ with respect to the surface normal. Evident is the third information 440 "765 321" together with the second information 420 "IV" and again the reference information 451, 452.

In Fig. 7c is a vertical plan view of the security document 2 is shown. From this viewing direction, only the second information 420 "IV" can be seen together with the reference information 451, 452. When viewed through the bottom 12, which is shown in Fig. 7d, only the second information 420 is mirror-inverted "VI" , The reference information can not be seen when viewed from this bottom 12 because the opaque material layer prevents the document body 10 from looking through those locations 461, 462 where the reference information should be visible.

It will be understood by those skilled in the art that only exemplary embodiments are described. The individual examples described in the various embodiments can be combined with each other. Preferably, the first and the second information are additionally linked in terms of information technology, for example, the second information may represent a check or checksum of the alphanumeric characters of the first information. Likewise, the third information may be selected and linked to the second information in the same way. However, as an alternative to the third information, fourth information may also be associated, which is likewise linked by the underside of the document body as static information stored via irreversible changes.

reference numeral

1 security item

2 security document

10 document bodies

1 1 top

12 bottom

13 surface normals

14 other surface

21 top level

22 lower level

30 edge length

40 document body thickness / distance top-bottom

50 top view

100 lamination bodies

1 10 transparent material layer

120 first laserable material layer

130 opaque material layer

135 recess

136 transparent material

140 second laserable material layer

150 transparent material layer

210 transparent substrate layer

220 first laser-capable substrate layer

230 opaque substrate layer

235 recess

236 transparent substrate

238 use

240 second laserable substrate layer

250 transparent substrate layer

270 supervisory section

280 window section

290 section boundary

300 microlens array

310 microlenses 320 a part

330 other part

350 central axis

410 first information

41 1 first irreversible material changes "a"

412 alphanumeric characters

413 average character width

415 Part of the first information stored in the pane

416 Part of the first information stored in the supervision section

420 second information

421 second irreversible material changes

430 total information

440 third information

441 third irreversible material changes

450 reference information

451 first reference information

452 second reference information

461 Place where the first reference information should be recognizable

462 Place where the second reference information should be recognizable

525 limit distance

601 a (viewing / marking) direction

602 further (viewing / marking) direction

61 1 View from the one viewing direction

612 further view from the further direction of observation

641 View through the bottom

1010 gathering station

1020 lamination station

1030 laser marking station

1 1 10 bracket

1 120 pivot axis

1 130 camera

1 140 Transmitted light source

1 141 Transmitted light view

1 150 grazing light source

1 151 Scattered light view 1200 control device

1300 marker light source

1305 light

1310 Spatial light modulator

1320 light incident direction / marking direction

Claims

claims

1 . Security article (1) with a flat document body (10) having a top (1 1) and an opposite bottom (12), wherein on or in the top (1 1) of the document body (10) formed a lens array (300) and in the document body laser-marked and detection-direction-dependent first information (410) is stored about first irreversible material changes in the document body whose optical detectability through the lens array (300) is dependent on a detection direction,

characterized in that

the document body (10) has a supervisory portion (270) in which the

Document body (10) between the top (1 1) and the bottom (12) of the document body (10) has a translucent or opaque material layer material, and adjacent to the top section (270) comprises a window portion (280) in which the document body (10) made of transparent material between the top (1 1) and the bottom (12) of the

Document body (10) is formed, and the lens array (300) extends both at least over a part of the window portion (280) and over at least part of the supervision section (270) and thereby a

Section boundary (290) between the supervision section (270) and the

Window section (280) spans, and also the laser-marked and

Detection-direction-dependent first information (410) partly in

Supervision section (270) and partially in the window portion (280) is formed and additionally in the window portion (280) a laser-marked and static second information (420) on second irreversible material changes in the document body (10) is stored, the second information (420) both by the lens array (300) on or in the top (1 1) of the document body (10) and by the bottom (12) of the document body (10) is visually detectable as static information.

2. Security object (1) according to claim 1, characterized in that the first information (410) and the second information (420) to a

Complete information (430). Security object (1) according to claim 2, characterized in that the total information (430) is stored in the document body (10) as reference information (450) for reference purposes in addition to the first and second irreversible material changes.

Security object (1) according to one of the preceding claims, characterized in that at least part of the second information (420) is stored immediately adjacent to the section boundary (290)

Security object (1) according to one of the preceding claims, characterized in that the total information (430) is human

includes detectable meaning, which is represented by the first information (410) nor by the second information (420) completely graphically.

Security object (1) according to one of the preceding claims, characterized in that between the upper side (1 1) and the translucent or opaque material layer, a first laser-sensitive transparent material layer is formed, in which the first irreversible material changes are formed.

Security object (1) according to one of the preceding claims, characterized in that in the document body (10) a second laser-sensitive transparent material layer is formed, which is formed between the first laser-sensitive transparent material layer and the underside (12) and in which the second irreversible material changes are formed.

Security object (1) according to one of the preceding claims, characterized in that the second laser-sensitive transparent material layer between the bottom (12) and the translucent or opaque material layer is arranged.

Security object (1) according to one of the preceding claims, characterized in that the document body (10) comprises a lamination body which is formed from different substrate layers, wherein the translucent or opaque material layer of a translucent or opaque Substrate layer is formed, which has in the region of the window portion (280) has a recess which is filled with a transparent material.

A method of manufacturing a security article (2), comprising

Steps:

Providing or producing a surface-extended document body (10) having an upper side (1 1) and an opposite lower side (12), wherein on or in the upper side (1 1) a lens array (300) is formed or is formed, and

Storing a first laser marked sensing direction dependent

Information in that laser light spatially modulated from one direction is irradiated through the lens array (300) and first irreversible material changes are effected in focal areas of the lenses of the lens array (300).

characterized in that the document body (10) with a

Viewing section (270), in which the document body (10) between the top (1 1) and the bottom (12) of the document body (10) has a translucent or opaque material layer in the volume, and with one of the

Supervisor portion (270) adjacent a window portion (280) in which the document body (10) is formed of volume transparent material between the top (1 1) and bottom (12) of the document body (10) and the lens array (300). is prepared or prepared, wherein the

Lens array (300) extends both at least over a portion of the window portion (280) and over at least a portion of the supervisor portion, thereby straddling a portion boundary (290) between the supervisor portion (270) and the window portion (280), and storing the first one

Information (410) is performed so that the laser-marked and detection direction-dependent first information (410) partially in

Supervision portion (270) and partially in the window portion (280) is formed and additionally in the window portion (280) through the bottom (12) further spatially modulated laser light is irradiated and static second information (420) on second irreversible material changes in

Document body is laser-marked and stored, wherein the second information (420) through both the lens array (300) on or in the top (1 1) of the Document body (10) and through the bottom (12) of the document body (10) is visually detectable as static information.

1 1. A method according to claim 10, characterized in that the second

Information (420) is selected so that it is supplemented with the first information (410) to a total information (430), the one detectable

Sense content that is completely graphically represented neither by the stored first information (410) nor by the second stored information.

12. The method according to claim 10 or 1 1, characterized in that the

Document body (10) is at least partially formed as a lamination body (1009) in which a plurality of substrate layers (210-250) are stacked together in a lamination step by introducing energy in a lamination step, wherein in the substrate layer stack is a translucent or opaque in volume Substrate layer is formed, which forms the translucent or opaque material layer of the document body (10), wherein the volume translucent or opaque substrate layer in a region of the

Window section (280) corresponds to a recess which is filled with a transparent material before or during the lamination step.

13. The method according to any one of claims 10 to 12, characterized in that the lens array (300) during the lamination step by means of a

Laminating sheet is embossed in the top (1 1) of the lamination body.

14. The method according to any one of claims 10 to 13, characterized in that an irradiation direction of the first spatially modulated laser light via a rotation of the document body (10) is carried out relative to a main optical axis of the spatially modulated first laser light.

15. The method according to any one of claims 10 to 14, characterized in that a position of a section boundary (290) between the window portion (280) and the supervisory portion (270) relative to a reference unit of a Marking device is determined and the spatial modulation and / or positioning of the irradiation of the first laser light is performed on the basis of the determined position of the distance limit.

Method according to one of claims 10 to 15, characterized in that for determining the position of the section boundary (290) a transmitted light image of the window section (280) is detected and evaluated.

Method according to one of claims 10 to 16, characterized in that in addition a position of the lens array (300) is determined in which a grazing light image of the top (1 1) of the document body (10) is detected and evaluated, and the position of the lens array ( 300) relative to the location of the section boundary (290) in performing the modulation of the first light and / or the positioning of the first laser light is taken into account.