EP4210961A1 - Mehrblättriges dokument mit sicherheitsmerkmalen und verfahren und vorrichtung zu seiner herstellung - Google Patents
Mehrblättriges dokument mit sicherheitsmerkmalen und verfahren und vorrichtung zu seiner herstellungInfo
- Publication number
- EP4210961A1 EP4210961A1 EP21762699.3A EP21762699A EP4210961A1 EP 4210961 A1 EP4210961 A1 EP 4210961A1 EP 21762699 A EP21762699 A EP 21762699A EP 4210961 A1 EP4210961 A1 EP 4210961A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- document
- security feature
- decoding
- sheet
- spectral range
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/24—Passports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—Translucent or partly translucent parts, e.g. windows
Definitions
- the present invention is in the field of security technology for documents and relates to a document having several document sheets (i.e. multi-sheet), in particular a security or valuable document, with security features, as well as a method and a device for its production.
- a document having several document sheets (i.e. multi-sheet), in particular a security or valuable document, with security features, as well as a method and a device for its production.
- Such a multi-page document with security features can in particular be an identification document.
- Bound multi-page security documents in particular as identification documents such as official passports or driver's licenses, are known from the prior art.
- Such documents often have a data sheet made of a multi-layer plastic laminate (also known as “data page” or “holder page”) as a carrier for the personal information and usually also for a photo of the ID card holder together with other document sheets (also called “visa pages”). which usually consist of paper or a tissue containing paper, bound in a cover or spine to form a book-like document (“book”).
- the binding is designed in such a way that a mostly rectangular tab area of the data sheet extending from one edge of the data sheet is used to fasten it in the cover, while the rest of the data sheet can be pivoted in relation to the tab area fixed in the cover like a leaf of a book.
- the cover usually has a front and a back spine, each designed as a multi-layer structure with a robust outer layer (also known as a "cover") to protect the document from unwanted external influences and a cover attached to the inside of the cover and closed when the cover is closed Book the first or last book page facing inner layer (also referred to as "Flyleaf" page).
- a robust outer layer also known as a "cover” to protect the document from unwanted external influences
- a cover attached to the inside of the cover and closed when the cover is closed Book the first or last book page facing inner layer (also referred to as "Flyleaf" page).
- one or more further layers can be arranged between the cover and the inner layer.
- An example of such a bound security document is the German passport as it is currently (2020) issued by the German authorities.
- the security features that are suitable for protecting security and valuable documents against counterfeiting include, in particular, optical security features in which specific information, such as personal information about an owner of the document, is not visible to the naked human eye as such recognizable or at least illegible manner within an image displayed on the document.
- Such security features include, in particular, a graphic security technology for personal documents known from publication DE19900856 C2, in which personal data (eg name, numbers, etc.) are encoded (encrypted) in an image of the person, in particular an ID photo. This security technique thus links the visible image directly to the data on the document owner and/or the document. This personal data is invisible to the human eye.
- authorized persons can easily check the authenticity with a special decoding lens with a lenticular lens when the decoding lens is placed on the photo to be decoded.
- WO 2019/053281 describes a solution of the type mentioned above, in which two different hidden images can be made visible or readable for the viewer selectively by selecting specific lighting situations and using a specific optical decoding device.
- the present invention is based on the object of creating an improved multi-page document protected by means of encoded security features, which can be verified simply and efficiently by the document itself on the basis of a self-decoding of the security features.
- a first aspect of the invention relates to a multi-page, in particular book-like, document, in particular a security document or document of value. It has: (i) a first document sheet on or in which a first optical security feature that is visible at least in a specific optical spectral range is provided; (ii) a second document sheet on or in which a second optical security feature that is visible at least in the spectral range is provided; and (iii) a third document sheet with a decoding element that is at least partially transparent in the spectral range for the optical decoding of both the first and the second optical security feature.
- a first hidden image or character is optically encoded in the first optical security feature and a second hidden image is in the second optical security feature Image or character optically encoded.
- Hidden means here that the hidden image or character in the optical security feature is difficult or impossible to see or decode with the naked human eye.
- two or more coded images or characters, such as text, can also be provided for each security feature.
- the third document sheet is movably connected to the first document sheet and the second document sheet in such a way that the first security feature of a first document page of the third document sheet opposite can be brought into at least partial overlap with the decoding element and the second security feature of a second document page of the third document side opposite the first document page Document sheet can be brought opposite to the decoding element in at least partial overlap.
- Each of the two hidden images or characters (together also referred to here as “coded information” or “hidden information”) can be optically decoded for the purpose of verifying the respective security feature using the decoding element in the spectral range by the decoding element overlapping with the to decoding first or second security feature is brought and this respective security feature in the spectral range I is viewed through the decoding element.
- coded information or “hidden information”
- Such an observation can be carried out in particular by a human observer or also by machine using a suitable sensor system.
- a “document sheet” within the meaning of the invention is to be understood as a sheet of a document.
- a book for example, regularly has a plurality, in particular a multiplicity, of document sheets bound to form the book.
- the two opposing (main) surfaces of a document sheet are referred to here as “document pages” or “pages” for short.
- the insides of a front or back spine or book cover of a book-like document each represent a "document page” and the spine or book cover themselves each represent a document sheet.
- a "multiple sheet” document accordingly has a plurality of document sheets.
- Several document sheets can also be designed as different sections of a common substrate and thereby be defined and delimited from one another in that a predetermined fold line is formed between them in or on the substrate, somewhat comparable to folding a map. so that the sections can be folded onto one another in a pivoting manner about the fold line and can thus be brought into at least partial overlapping without being destroyed.
- An “optical security feature” of an object, in particular a document, is to be understood within the meaning of the invention as a characteristic, optically detectable property of the object that proves the authenticity (authenticity) of the object and makes it impossible or at least considerably more difficult to counterfeit it.
- a coding in which certain information, such as personal information about an owner of the security or value document, is not recognizable as such to the naked human eye or at least not legible within a way that is displayed on the object, in particular a document Image is coded, such as a coding of the type mentioned as security technology, a security feature within the meaning of the invention.
- the optical spectral range can in particular correspond to the visible range, the infrared range, or the ultraviolet range of the electromagnetic spectrum or a respective section thereof or the spectral range covered overall by these ranges or a section thereof.
- the terms “comprises,” “includes,” “includes,” “has,” “has,” “having,” or any other variation are intended to cover non-exclusive inclusion.
- a method or apparatus Anything that includes or comprises a list of elements is not necessarily limited to those elements but may include other elements not expressly listed or inherent in such a method or apparatus.
- a condition A or B is satisfied by one of the following conditions: A is true (or present) and B is false (or absent), A is false (or absent) and B is true (or present), and both A and B are true (or present).
- the terms “a” or “an” are defined to mean “one or more”.
- the terms “another” and “another” and any other variant thereof shall be construed to mean “at least one other”.
- the term “plurality” as used herein means “two or more”.
- At least two security features are provided on or in different document sheets, which can be optically decoded quickly and easily with one and the same decoding element, which is also already contained in the multi-sheet document, in particular for the purpose of Verification of the authenticity of the security features and thus indirectly of the document as a whole. It is also advantageous that due to the arrangement of the security features on both sides in relation to the third document sheet and the bidirectional usability of the decoding element in relation to the viewing direction through the decoding element, the decoding element can be used in only a small amount of time by simply turning the pages of the third document sheet in order to successively add the two security features or at least with a security feature to overlap individually, such a verification can be carried out.
- the decoding element has (i) a sub-area that is at least partially transparent in the spectral range and (ii) a structuring superimposed on this sub-area with a lower or no transparency in the spectral range compared to the sub-area, so that when decoding the first or second security feature certain surface areas of the hidden image or character to be decoded in the respective security feature are selectively covered by the structuring for the purpose of decoding, so that the respective hidden image or character encoded depending on the structuring can be recognized by means of the surface areas that are not covered allow.
- Such a decoding element With such a decoding element, with corresponding coding of the hidden images, a simple subsequent decoding of the same is possible, in particular without a special optical lens based on light refraction, such as a lenticular lens, being required.
- a decoding element can be used bidirectionally, which means that, given the configuration of the multi-page document, it is possible to use the same decoding element on the third document sheet to decode both the first security feature on the first document sheet and - looking in the opposite direction through the decoding element - the second security feature on the second decode document sheet.
- the coding can be simplified since no optical imaging properties of one or more optical decoding lenses have to be taken into account.
- the structuring has a regular grid.
- the grid can in particular have a line grid of parallel lines with intervening spaces. This is particularly expedient if the encoded security feature also has a line grid which, when the decoding element and the respective security element to be decoded are superimposed, has the same orientation (angle) as the line grid of the decoding element.
- Such a regular grid further simplifies the corresponding preceding coding of the hidden images or characters, since the complexity of the coding can be reduced due to the regularity.
- such a regular grid means that, due to the resulting substantially homogeneous coding density, the hiding of the coded information within the respective security feature is improved and a more homogeneous representation of the decoded image or character can be achieved when the same is decoded. It is also possible in this way to generate a variable image or character that arises or varies depending on the viewing angle, for example when the document is tilted.
- the lines are evenly spaced and have a resolution in the range of 35 to 60 lines/cm, preferably 40 to 55 lines/cm.
- the advantage of choosing a resolution in these value ranges is, in particular, that the printing accuracy, which is typically used for the production of security documents, in particular passports, driver's licenses and similar official documents and is even prescribed in many countries, can be achieved with the paper substrates and printing processes for generating the security features is, with such resolutions of the line grid, a particularly reliable coding and subsequent decoding is permitted.
- With lower resolutions there is an increasing risk that the hidden image will be easier to see with the naked eye, while with higher resolutions there is a growing risk that the achievable print quality will no longer be able to keep up with the resolution of the line grid, resulting in inaccuracies or errors in coding and consequently can also occur to an increasing extent during the subsequent decoding by means of the decoding element.
- the structuring is formed using printing constructed line by line, and the line grid is formed at least in sections from a plurality of straight, parallel line segments, these line segments enclosing an angle other than zero with the lines of the printing.
- provision can be made in particular for this angle to be variably adjustable.
- Such printing can be implemented, for example, by means of an inkjet printer that works line by line or a drop-on-demand (DOD) printer.
- DOD drop-on-demand
- a particular advantage of these embodiments is that the printing direction and the alignment of the line grid differ, so that potentially occurring printing errors during the printing process, such as printed lines that are printed too weakly or incompletely, have less of a negative impact on the decoding result that can be achieved using such a resulting decoding element than if the printing direction and line direction coincide and, in the worst case, entire lines required for decoding would be negatively affected or even missing due to the poor print result.
- the angle of the printed lines is preferably neither 0° nor 90° or a multiple thereof, so that an arrangement of the lines parallel or perpendicular to the printing direction is avoided.
- this can be provided in such a way that the lines are not perpendicular or parallel to the pivot axis of the document pages of the document. In this way it can also be ensured in particular that the direction of the line and the direction of printing also then fall apart when the printer or print layout is rotated 90° or multiples of it.
- the decoding element has a substrate that is at least partially transparent in the spectral range, on or in which the structuring is formed by means of printing, a selective material change or a selective material removal.
- These structurings can, in particular, be laser-assisted.
- the material change or the material removal can be carried out in particular by means of such a laser treatment, in particular as a laser engraving.
- the printed structuring on or in the decoding element can be formed in particular by means of drop-on-demand (DoD) or by means of an offset printer.
- the partially transparent substrate can in particular be a plastic substrate with appropriate transparency, for example made of polycarbonate that is transparent or partially transparent in the spectral range, for example for visible light.
- the substrate thus serves as a carrier of the structuring, in particular a mechanically robust one, and also allows the partial view through the decoding element required for decoding a respective security element, so that the decoded image or character becomes recognizable due to the selective covering of parts of the security feature by means of the structuring of the decoding element .
- the first document sheet or the second document sheet has a paper substrate on which the respective associated first or second security feature is at least partially printed.
- the paper substrate has a water absorption rate according to the standard DIN EN 20535 or ISO 535 (Cobb 60s) between 18 and 30 g/m 2 , preferably between 18 and 28 g/m 2 , particularly preferably between 22 and 24 g/m 2 each within 60 s.
- the third document sheet has a layer stack composed of a plurality of substrates (layers) lying one on top of the other and connected to form the layer stack, and the structuring is on or in at least two of these substrates formed.
- these embodiments allow these substrates to first be connected to form the layer stack, and the structuring to be carried out only subsequently with respect to this already existing layer stack.
- tunnel-like at least partially transparent areas can also be formed between the structures, which in this respect have an increased directivity with regard to the possible viewing direction compared to variants of the structuring that only affect a single substrate have, so that the decoding is made possible even if the decoding element is at a finite, small, non-zero distance from the surface of the security feature to be decoded. In such cases, it is no longer absolutely necessary to directly hang up without a gap in order to achieve decoding.
- the third document sheet in turn has a stack of layers made of a plurality of substrates (layers) lying one on top of the other and connected to form the stack of layers.
- the structuring is formed at least partially, in particular exclusively, on or in one of these substrates. This makes it possible, in particular, to carry out this structuring even before the stack is formed with respect to only the substrate to be structured and then to integrate this into the layer stack.
- this structuring can only be formed on or in one of the substrates surrounded on both sides by at least one further substrate each. A protective effect against undesired external, in particular mechanical or chemical, influences can thus be achieved for this structuring by means of these further substrates.
- the structuring is at least partially formed on a surface of the third document sheet in such a way that it has elevations or depressions of at least 1 ⁇ m in height or depth on or in the surface. This has the advantage that elevations or depressions of this type can regularly be detected by the human sense of touch and thus enable an additional safety check based on the structuring provided on the surface or a portion thereof provided there.
- the third document sheet has an area that is opaque in the spectral range and a window area that is at least partially transparent in the spectral range, in which the decoding element is arranged.
- the window area can have a high level of transparency (“clear window”), except at the points that may be occupied by the structuring.
- easily readable information can be applied in or on the non-transparent area, in particular on both sides, while the decoding element is arranged completely or at least partially in the window area.
- the document is in the form of a book with a front and a back cover and one or more further document sheets lying between them and the third document sheet forms one of these further document sheets lying between the book covers.
- An example of such a document would be the typical structure of a passport.
- the third document sheet can be bound directly next to the front book cover or the back book cover in the book-like document, so that the front book cover forms the first document sheet or the back book cover forms the second document sheet. It is thus possible to provide one or even both security features on the insides of the book cover without requiring additional document sheets arranged between the book covers beyond the third document sheet.
- the third document sheet can be bound between two adjacent further document sheets, so that these two adjacent document sheets form the first or the second document sheet. This makes it possible to provide the security features on such further document sheets inside the book-like document.
- the first hidden image or character and the second hidden image or character match after their decoding at least with regard to a characteristic image or character feature, in particular even overall, when they are viewed in the spectral range.
- the first security feature and the second security feature agree before their decoding at least with regard to a characteristic image or character feature when they are viewed in the spectral range.
- the first security feature and the second security feature differ before their decoding at least with regard to a characteristic image or character feature when viewed in the spectral range and/or the first hidden image or character and the second hidden image or characters differ after their decoding at least with regard to one characteristic image or character feature when viewed in the spectral range.
- a second aspect of the invention relates to a method for producing a document according to the first aspect of the invention.
- the method comprises joining a first, a second and a third document sheet, and optionally one or more further document sheets, to form a multi-sheet document.
- a first optical security feature that is visible at least in a specific optical spectral range is or will be provided or generated on or in the first document sheet;
- a second optical security feature that is visible at least in the spectral range is provided or produced on or in the second document sheet;
- a decoding element that is at least partially transparent in the spectral range is provided or generated on or in the third document sheet for the optical decoding of both the first and the second optical security feature;
- connection of the first, the second and the third document sheet takes place in such a way that these document sheets are then movably connected in such a way that the first security feature of a first document page of the third document sheet can be brought into at least partial overlap with the decoding element and the second Security feature of a second document page opposite the first document page of the third Document sheet can be brought opposite to the decoding element in at least partial overlap.
- Each of the two hidden images or characters is or will be designed in such a way that it can be optically decoded for the purpose of verifying the respective security feature using the decoding element in the spectral range by bringing the decoding element into overlap with the first or second security feature to be decoded and this respective security feature in the spectral range is viewed through the decoding element.
- a third aspect of the invention relates to a device that is set up to carry out the method according to the second aspect of the invention for producing a document according to the first aspect of the invention.
- FIG. 1 schematically shows a multi-page document according to a first embodiment of the invention in a sectional view perpendicular to the book axis;
- FIG. 2 shows a schematic of a multi-page document, in particular a passport, according to a second embodiment of the invention, also in a sectional view perpendicular to the book axis;
- FIG. 3 schematically shows a simplified example to illustrate an information coding, in particular a character coding, according to some embodiments of the invention
- FIG. 4 schematically shows a simple example to illustrate an information coding, in particular a text coding, according to some embodiments of the invention
- Fig. 5 schematically shows a cross-sectional view of an exemplary third document sheet in the form of a laminated layer stack with a on a inner layer decoding element, according to some embodiments of the invention
- FIG. 6 schematically shows a cross-sectional view of an exemplary third document sheet in the form of a laminated stack of layers with a laser-machined decoding element extending through all layers of the stack of layers, according to some further embodiments of the invention
- FIG. 8 shows schematically an apparatus according to some embodiments of the invention for producing a multi-page document, in particular according to the method from FIG. 7.
- the first, particularly simple, embodiment 100 of a multi-page, book-like document illustrated in Fig. 1 has a first document sheet 110 designed as a front book cover, a second document sheet 120 designed as a rear book cover and, arranged between these two, a third document sheet 130.
- the first document sheet 110 carries on its inner side facing the third document sheet 130 a first optical security feature 115 with information encoded in a hidden manner therein, which can be encoded in particular according to the encoding method illustrated in FIG. 3 and in particular according to FIG. 4 in a visible manner visible image 160 may have hidden character (or multi-character text) 165 .
- the second document sheet 120 has on its inner side facing the third document sheet 130 a second optical security feature 125 with further information encoded in the same way hidden therein, which can be identical to the information encoded in the first security feature 115 or different from it.
- the first document sheet 110 and/or the second document sheet 120 can in particular be or have a paper substrate that has a water absorption rate according to the standard DIN EN 20535 or ISO 535 (Cobb 60s) between 18 and 30 g/m 2 , preferably between 18 and 28 g/m 2 , particularly preferably between 22 and 24 g/m 2 , in each case within 60 s.
- Such a substrate is particularly suitable for the production of a security document or document of value, in particular an official security document such as an identity document or a driver's license, since the print resolutions required for this that can be effectively achieved, in particular when using inkjet or drop-on-demand (DOD ) pressure can meet.
- a security document or document of value in particular an official security document such as an identity document or a driver's license
- the third document sheet 130 on the inside has a decoding element 135 of the document 100, which can be embodied in particular according to FIG. 5 or FIG. It is configured in such a way that both the hidden information encoded in the first security feature 115 and in the second security feature 125 can be optically decoded when the decoding element 135 is placed over the corresponding security features 115 or 125. Accordingly, the decoding element 135 represents a key for decrypting the information encrypted in the two security features 115 and 125 by coding in terms of cryptography.
- security features 115 and 125 must also match the key defined by the decoding element 135 in order to allow successful decoding (ie decryption).
- the document sheets 110, 120 and 130 are connected to one another, in particular in the sense of a book binding, that the document sheets 110, 120, 130 can be pivoted relative to one another about a common pivot axis which is perpendicular to the plane of the drawing in FIG.
- the security features 115 and 125 and the decoding element 135 are arranged on the document sheet 110, 120 or 130 carrying them in such a way that when all three document sheets 110, 120 and 130 come to lie on top of one another by folding the book-like document 110, the decoding element 135 the two security features 115 and 125 at least partially, preferably completely, overlaps.
- the three document sheets 110, 120 and 130 do not have a common pivot axis but rather different pivot axes.
- the position of the security features 115 and 125 and the decoding element 135 is chosen so that the decoding element 135 at least partially overlaps with the first security feature 115 when the third document sheet 130 is pivoted onto the first document sheet 110 (or vice versa) and on the other hand the decoding element 135 at least partially overlaps with the second security feature 125 when the third document sheet 130 is pivoted onto the second document sheet 120 ( or vice versa), without the respective other security feature 115 or 125 additionally having to cover the overlapping area in whole or in part.
- the third document sheet 130 is thus movably connected to the first document sheet 110 and the second document sheet 120 in such a way that the first security feature 115 of a first document side of the third document sheet 130 opposite can be brought into at least partial overlap with the decoding element 135 and the second security feature 125 of a second document page of the third document sheet 130, which is opposite the first document page, can be brought into at least partial overlap with the decoding element 135.
- the third document sheet 130 can now be placed on the first document sheet 110 or the second document sheet 120 by pivoting it accordingly and the information encoded in the corresponding security feature 115 or 125 can be decoded with the aid of a look through the decoding element 135 and therefore checked.
- This check can be carried out, for example, by a person such as, in the case of a passport, a member of the border staff or the police.
- an image sensor in particular by means of a camera directed at the decoding element 135 and the underlying security feature 115 or 125, and then manually or again automatically, for example using appropriately configured image recognition or image processing algorithms , to evaluate in terms of a verification of the document 100.
- a corresponding verification with regard to the respective other security feature 125 or 115 can then be carried out in the same way by overlapping the document sheet 120 or 110 carrying this other security feature with the decoding element 135 by pivoting at least one of the document sheets 135 and 120 or 110 involved is brought.
- both security features 115 and 125 can be decoded one after the other in a fast and efficient manner and thus verified.
- the second embodiment 200 of a multi-page, book-like document illustrated in FIG. 2 represents a further development of the document 100 from FIG. 1, in which one or more further internal document pages are provided in addition to the third document page 130.
- Two such further document sheets 120 and 140 are shown in FIG. 2 by way of example.
- the second security feature 125 is no longer on the rear book cover, as in Fig. 1, which is identified here by the reference number 150, but instead on the further document sheet 120 immediately adjacent to the third document sheet 130 and in this respect opposite the first document sheet 110, which thus serves as a second document sheet within the meaning of the invention.
- further document sheets 120, 140 are available here, for example as visa pages of a passport.
- the verification of the document 200 takes place accordingly in the manner already explained for FIG. 1 .
- FIG. 3 schematically shows a simplified example to illustrate an information encoding and decoding 300, in particular a character encoding, according to some embodiments of the invention.
- the description of the coding or decoding made here with exemplary reference to the security feature 115 and the various figures can in particular be applied equally to the other security feature 125, without this being mentioned in detail in each case below.
- the information 155 to be encoded and therefore to be hidden within a security feature 115 in an image visible to the naked eye consists of a single character “H”.
- the coding is defined in such a way that the image is formed from a regular line grid of parallel lines, in which a line shift is carried out within the circumference of the character 155, as shown in FIG. 3 (a).
- the various lines of the line grid are variably colored to display the image that is visible to the naked eye, for example with corresponding color values or gray values, for example, or just in a black-and-white display.
- the hidden character 115 is easily recognizable in Fig.
- a resolution in the range from 35 to 60 lines/cm, preferably from 40 to 55 lines/cm can advantageously be selected here.
- Fig. 3 (b) shows a decoding element 135 corresponding to the coded image, which has a transparent carrier substrate, for example made of transparent plastic, on which a regular line grid of opaque lines parallel to one another is formed, with this line grid being different in particular with regard to its line spacing and its line width corresponds to that of Fig. 3 (a).
- Special possible embodiments of the decoding element 135 are explained in detail below with reference to FIGS.
- the decoding element 135, as illustrated in FIG. 3 (c), is placed over the security feature 115 with the encoded image in such a way that the lines of both line grids come to rest on one another outside of the character, the hidden character 155 becomes visible, since the Non-transparent lines of the decoding element 135 cover the transparent spaces between the non-transparent line sections of the security feature 115 representing the character 155 and thus complete the representation of the character 155 in such a way that it can be recognized in relation to the image environment formed by the line grid.
- FIG. 4 shows a simple example 400 to illustrate information coding (encryption), in particular text coding, which can be designed in accordance with the coding principle illustrated in FIG. 3 .
- an image 160 to be displayed by the security feature 115 as a motif visible to the naked eye is coded using information 165 in the form of a number of text lines, the text lines in the image 160 being hidden by the coding.
- the security feature 115 is thus formed by the image 160 including the information 165 hidden therein.
- the writing direction of the text visible after decoding (information 165) is arranged at an angle relative to the orientation of the image 160, here for example 45°.
- the writing direction or alignment of the hidden image or text can be selected as desired, in particular - in the case of a line grid-like structuring of the decoding element 135 also independently of the orientation of the lines of the line grid (as illustrated, different angle), whereas the orientation of the lines, by means of which the combination of the image 160 and the hidden image or text 165 is displayed on the security element 115 have the same orientation as the line grid of the decoding element.
- the angled orientation of the lines of the image 160 or the writing direction of the text information 165 is particularly advantageous when both the image 160 and the information 165 are generated line by line, for example by a line-based printer (e.g. inkjet printer). If, in such a case, fluctuations or errors occur in the production of the lines when the security feature 115 is produced, the information to be displayed is generally less disturbed than if the lines (for example printed line) run parallel to the direction of writing.
- a line-based printer e.g. inkjet printer
- a decoding element 135 that corresponds to the selected coding is placed entirely or partially over the security feature 115 . If, in particular, a coding according to FIG. 3 is selected and the lines of the line grid for the representation of the security feature 115 run at an angle relative to the orientation of the image 160, which in the case of hidden text is in particular the same as or different from the angle of the aforementioned writing direction can be, the corresponding line grid of the decoding element 135 must initially run at a substantially the same angle in order to bring about a successful decoding.
- the security feature 115 and the decoding element 135 are brought into a decoding position in which both are brought into an overlap, as is the case, for example, with the documents 100 or 200 from Figures 1 and 2, if the first document sheet 110 and the third document sheet 130 are placed on top of one another by pivoting, the hidden information, in the given example the hidden text 165, is recognizable in the overlapping area 175 and is thus decoded (decrypted).
- the image 160 remains visible, at least in part, both in the non-overlapping area 170 and in the overlapping area 175 .
- the information in a possibly present non-overlapping area 170 remains hidden.
- At least one of the security features 115, 125 is designed, for example printed, with a color or color combination in the visible spectral range.
- visible light e.g daylight
- the encoded information 165 are visible, in particular with the naked eye
- Both the image 160 and the encoded information are formed with only one color or combination of colors in the ultraviolet (UV) or infrared (IR) spectral range.
- the security feature when the security feature is illuminated with UV light or IR light, at least parts of the image 160 and, after decoding, the encoded information 165 are “visible” in the UV or IR spectral range; (iii) All components of the security feature 115/125 (image 160 + coded information 165) are printed with a color or color combination in the visible spectral range and additionally with a color or color combination in the UV spectral range or IR spectral range. The UV or IR images or image components are then invisible in the visible spectral range, while the images or image components from the color or color combination are simultaneously visible in the visible spectral range.
- a first possible configuration 500 of the third document sheet 130, in particular its decoding element 135, is illustrated in FIG.
- the third document sheet 130 here has a layer stack made up of a plurality of layers 510-540 lying one on top of the other and laminated to one another, or even consists only of them.
- the layers are each formed as a substrate, for example a substrate containing plastic or paper. Although four layers are shown here by way of example, this number does not constitute a limitation. Rather, those skilled in the art will recognize that other numbers of layers are also possible.
- a window region 550 is formed in the stack of layers, which is created in that in this region the superimposed regions of the various layers each have a transparent partial region 560 from a spectral region of interest, for example in the visible spectral region.
- the window area 550 is surrounded by a non-transparent layer area 580, at least on one of its sides.
- a decoding element 135 is formed within the window area 550 in at least one of these layers, in the present example this is the layer 520 .
- This can in particular by means of printing or other suitable surface treatment (e.g. laser engraving) of a surface of the layer 520 before Be formed assembling the layer stack.
- the processed surface sections represent a regular line grid of parallel non-transparent lines or lines with in any case reduced transparency compared to the transparent areas 560.
- the position of the decoding element 135 has in the interior of the layer stack in particular the advantage that the decoding element 135 is better protected from unwanted external influences by the layers 510, 530 and 540 surrounding it than if it were lying on the surface of the layer stack.
- the decoding element 135 is specifically formed on an outer surface of the layer stack, in such a way that it can also be felt with the human sense of touch and can thus be used as a further security feature.
- FIG. 6 shows a second possible configuration 600 of the third document sheet 130, in particular its decoding element 135.
- the decoding element 135 extends over the entire thickness of the layer stack.
- the originally transparent layer sections within the window area can subsequently, d. H. after the layer stack has been formed by means of a material-changing process, in particular laser processing, may have been changed selectively at specific locations 570 in order to form the decoding element 135 .
- these positions 570 can form the line grid required for decoding, in which case the depth of these lines can extend through the entire stack of layers, as shown in FIG.
- Transparent (or at least partially transparent) areas 560 remain between the lines 570 to form the grid required for decoding.
- FIG. 7 shows a flowchart to illustrate an exemplary embodiment 700 of the method according to the invention for producing a multi-page document, in particular a security document or document of value, such as document 100 or document 200 from FIGS. 1 or 2.
- a security document or document of value such as document 100 or document 200 from FIGS. 1 or 2.
- Production device 800 for producing the documents according to FIG. 8 which is set up to carry out the method 700 .
- a first optical security feature 115 is applied on or in a first document sheet 110 of the document 200 to be produced, with information 165 hidden therein by means of image coding, which in particular can itself represent an image or character or text , generated.
- image coding which in particular can itself represent an image or character or text , generated.
- a second optical security feature 125 to be carried out on or in a second document sheet 120 of the document 100 or 200 to be produced, with a hidden therein by means of image coding Information 165' is generated.
- the appearance of the two security features 115 and 125 that can be seen with the naked eye can be either identical or different. The same applies to the hidden information 165 and 165'.
- step 730 a third document sheet 130 according to FIG. 5 or FIG. 6 is then formed in a third production module 830 with a window area in which a decoding element 135 is generated.
- step 730 can involve, in particular, a laminating process 730a provided by a laminating module 830a to generate the layer stack, and a laser engraving process 730b provided by a laser engraving module 830 and/or a use printing process 730c provided by a printing module 830c.
- the order in which the individual document sheets 110 to 130 and possibly further document sheets 140, 150 to be integrated into the document 200 to be produced, in particular to be produced by means of at least one further production module 840, are produced can basically be freely selected.
- a simultaneous production of two or more, in particular all document sheets of the document 100 or 200 to be produced is also possible.
- a book binder module 850 is used to join the document sheets to form a book-shaped, multi-sheet document (book) 100 or 200.
- the third document sheet 130 is arranged within the book 100 or 200 in such a way that it is directly between the first Document sheet 110 and the second document sheet 120 comes to rest, so that the folded State of the book 100 or 200, the decoding element 135 of the third document sheet 130 overlaps both the first security feature 115 and the second security feature 125, in particular congruent.
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Abstract
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DE102020123430.9A DE102020123430A1 (de) | 2020-09-08 | 2020-09-08 | Mehrblättriges dokument mit sicherheitsmerkmalen und verfahren und vorrichtung zu seiner herstellung |
PCT/EP2021/072883 WO2022053268A1 (de) | 2020-09-08 | 2021-08-18 | Mehrblättriges dokument mit sicherheitsmerkmalen und verfahren und vorrichtung zu seiner herstellung |
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Publication number | Priority date | Publication date | Assignee | Title |
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AUPP044197A0 (en) | 1997-11-19 | 1997-12-11 | Securency Pty Ltd | Moire security device |
US6104812A (en) | 1998-01-12 | 2000-08-15 | Juratrade, Limited | Anti-counterfeiting method and apparatus using digital screening |
US8282015B2 (en) * | 2005-08-01 | 2012-10-09 | Document Security Systems, Inc. | Document with linked viewer file for correlated printing |
NL2011352C2 (en) | 2013-08-29 | 2015-03-10 | Morpho B V | Identification assembly for an identity document. |
MX2016016036A (es) * | 2014-06-06 | 2017-07-13 | Gemalto Ag | Elemento de seguridad y documento de identificacion. |
GB201604947D0 (en) * | 2016-03-23 | 2016-05-04 | Rue De Int Ltd | A security document comprising a polymer substrate |
EP3457323A1 (de) | 2017-09-18 | 2019-03-20 | Gemalto Sa | Datenträger und verfahren zur herstellung solch eines datenträgers |
EP3725536A1 (de) | 2019-04-18 | 2020-10-21 | Thales Dis France SA | Sicherheitsdokument mit doppelverifikationslinsen |
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