EP2828094A1 - Verfahren zur herstellung eines sicherheitsverbundkörpers und sicherheitsverbundkörper mit zwei optisch brechenden strukturen - Google Patents
Verfahren zur herstellung eines sicherheitsverbundkörpers und sicherheitsverbundkörper mit zwei optisch brechenden strukturenInfo
- Publication number
- EP2828094A1 EP2828094A1 EP13709481.9A EP13709481A EP2828094A1 EP 2828094 A1 EP2828094 A1 EP 2828094A1 EP 13709481 A EP13709481 A EP 13709481A EP 2828094 A1 EP2828094 A1 EP 2828094A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- relief structure
- composite body
- boundary layer
- lens elements
- feature
- 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.)
- Granted
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
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/41—Marking using electromagnetic radiation
-
- 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
- B42D25/324—Reliefs
-
- 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
- B42D25/29—Securities; Bank notes
-
- 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
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
-
- B42D2033/22—
-
- B42D2035/20—
-
- B42D2035/36—
-
- B42D2035/44—
Definitions
- the invention relates to a method for producing a security composite body as well as a security composite body, which has a formed on a surface optically refractive structure.
- a safety composite body a composite body made of a plurality of materials is considered, which is at least one of a fake, imitation,
- Safety composite body for example, for the production of
- ⁇ documents used For example, modern passport or personal documents often include a document body made of plastic. Such a document body is usually made of several layers, such as films, the same or different plastic materials. Such a document body is often a security composite.
- security compounds or security documents have so-called security features.
- One class of security features shows an optical effect due to a refraction of light on an optical structure.
- some security features show a viewing angle dependent optical effect.
- some security documents include a refractive structure formed on a surface of a document body, for example in the form of a lenticular lens comprising a plurality of lens elements in a lens array, and spaced therefrom an optically detectable information stored in the document body.
- a recording medium which has an upper layer which has on its outer side a plurality of lenticular lenses and on the back a display element which appears to be movable about at least one axis when the recording medium is tilted.
- the lenticular lenses extend only over one Part 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.
- Contact area is as large as or larger than the top or bottom of the substrate.
- 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 is formed in the surface layer, wherein the sonotrode is provided and / or manufactured with a structuring having a target receiving ring level and the sonotrode is structured so that from the target intrusion plane
- 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.
- 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.
- the information is stored at different locations in the substrate.
- different information depending on a
- 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.
- card-shaped data carriers which have a lenticular grid on a surface are described.
- the lenticular grid can be embossed during a laminating process by incorporating a negative of the lenticular grid into a corresponding laminating plate.
- a thermostable embossing die can be used, which is inserted between the transparent cover layer and the lamination plate.
- 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.
- microlenses in particular relative to the same time introduced in a lamination process microlenses is insufficiently guaranteed.
- the invention is therefore the technical object of a method for producing a novel safety composite body and a novel
- the invention is based on the idea to produce a composite body, which in addition to a formed on the outer surface refractive optical structure in the interior of the composite body has a further light-refracting optical structure, which in combination have an optical effect that differs from that can only be realized with the refractive surface structure.
- the composite body is produced from different plastic materials, which are transparent in volume, and have different refractive indices.
- Such a novel security composite body comprises at an interface between the two plastic materials having different refractive indices
- Relief structure Light passing through the interface becomes dependent on an angle of incidence relative to a local surface normal at Interface relief structure due to different refractive indices
- boundary layer relief structure for example in the form of a plurality of microlenses, a local focusing of originally parallel incident light beams in an area behind the boundary surface can take place in each case.
- light passing through the boundary layer relief structure is refracted other than passing through a planar interface between materials of different refractive indices.
- optical structure on a surface of the composite it is thus possible to carry out different types of optical images and to achieve different optical effects when a feature is considered by a surface relief structure and the boundary layer relief structure for verification.
- a security composite body having an optically refractive structure comprising a composite body, at least one optically verifiable feature and at least one surface relief structure on an outer surface of the composite body for forming an optical structure for assisting optically detecting the at least one optically verifiable feature Interior of the
- a method for producing a security composite body comprises the steps of: producing a composite body, forming a composite body
- a surface relief structure on an outer surface of the composite body incorporating an optically verifiable feature into the composite body, wherein the
- the composite body is fabricated such that, in the interior, there is an interface between a first plastic material having a first refractive index ni and a second plastic material having a first refractive index different second refractive index n 2 with a deviating from a flat surface
- Boundary layer relief structure is structured and aligned in register with the optically verifiable feature and the surface relief structure, so that a verification of the optically verifiable feature by means of one of a combination of
- optical structure extends as it were over the entire structure of the security composite body. Will now be one
- a relief is considered to be any structure that deviates from a plane plane.
- a relief on a surface of a body is referred to here as a surface relief structure, a relief structure at the boundary between two materials inside a body as a boundary layer relief structure.
- a relief representing an interface between two materials having different refractive indices is called an optical structure. Such interfaces occur at the surface during the transition from the air to the plastic material or between plastic materials of different refractive indices.
- An optical structure breaks electromagnetic radiation, in particular visible light, in accordance with the laws of geometric optics.
- An optical structure having an imaging property is called an imaging optical structure.
- Optical structures include in particular microlenses, Fresnel lenses and lenticular lenses.
- Microlenses or lenticular lenses are lenses whose radii of curvature lie in the micrometer range (1 ⁇ m to 1 mm).
- the curvature may be spherical, aspherical or a freeform. In a preferred Embodiment, the curvature will be spherical or cylindrical.
- Lens array is a regular grid-like arrangement of lenses. Microlenses may also be formed in a 2D grid and / or each have a rotationally symmetrical shape.
- Printing technology are or are introduced.
- Usual printing techniques are high-pressure, especially in the form of Letterset, planographic printing, in particular in the expression offset printing, gravure, in particular in the forms intaglio and
- Rotogravure, printing especially in the form of screen printing, as well as
- Digital printing in particular in the categories inkjet printing, thermal transfer printing, dye diffusion thermal transfer (D2T2) printing, retransfer printing, and thermal sublimation printing.
- D2T2 dye diffusion thermal transfer
- An optically detectable or optically verifiable feature is any feature, such as any information, that passes through a surface of a surface
- Document body can be graphically detected with an optical sensor.
- the detected information is the graphically acquired information. This can lag behind a detectable total content of the detectable information in terms of a detected content. This applies, for example, if an information content with
- an optically detectable information may be formed so that their graphical detection with a predetermined resolution or magnification represents a first information content and at an improved resolution or higher magnification magnification, a "fine structure" price that represents a second information content.
- Color is a gatherable piece of information when it produces a color impression when viewed in a human view, with shades of gray, white and black not being considered be viewed in color. Also luminescent colorants that cause color only with appropriate stimulation, are considered colored.
- a color impression is considered in a perception.
- Grays, white and black also represent a color in this sense.
- Colorful is an information, if this includes several colored colors. A colorful information is thus not monochrome.
- An optically detectable information "integrated inside a document body” means that the information is introduced into the document body so that it has a distance from the surfaces of the document body in the finished document body.
- Boundary layer relief structure defining relief structure is introduced, this relief structure is superimposed with the second plastic material, which is that of the first
- Refractive index deviating second refractive index n 2 and the second plastic material and the substrate layer are optionally joined together with further substrate layers to form a security composite body composite body.
- the relief structure is introduced into the substrate layer and / or the surface relief structure is formed by means of an ultrasonic embossing method.
- an ultrasonic embossing method In this ultrasound is coupled into a structured sonotrode and this brought under pressure of contact with the top of the transparent layer or the body surface in contact, in the one
- Relief structure to be introduced.
- Ultrasonic embossing is that the formation of the relief structure in the transparent layer can be done in such a way that only a minimum amount of energy required in the transparent plastic material must be introduced. These it is a thermoplastic material, so this is heated only locally and does not melt in the entire volume. In particular, if the relief structure is to be formed only in a small partial area relative to the surface of the security composite body to be produced, this is of enormous advantage.
- one of the two relief structures or the two relief structures can also be formed by hot embossing of a embossing plate or by structuring by means of laser radiation, in particular by means of a laser ablation.
- a laser ablation is preferably carried out by means of an intense pulsed laser, which ablates in a targeted manner material from the surface of the transparent substrate layer or a finished composite body.
- the composite body by means of a
- the person skilled in preparations based on a polymer in liquid form are known. For example, from the document DE 10 2007 052 847 preparations are known, which are prepared on a polycarbonate basis and by means of a
- the component is arranged on the first polymer layer or inserted into a recess of the first polymer layer, b) the first polymer layer is on the side on or in which the component is arranged, at least in the region of the component with a liquid preparation containing a solvent or a solvent mixture and a polycarbonate derivative based on a geminal disubstituted dihydroxydiphenyl cycloalkane, coated, c) optionally followed by stage b) a
- step d) subsequent to step b) or step c), the second polymer layer is applied to the first polymer layer covering the device; e) the first polymer layer and the second polymer layer are pressurized at a temperature in the range of 120 to ⁇ ⁇ ' ⁇ and laminated together for a defined period of time.
- the person skilled in the art is thus fundamentally familiar with preparations which are suitable for producing a safety composite body based on plastics.
- the second plastic material is applied by means of a printing process, so that at least in the region in which the relief of a substrate layer is formed by means of the second plastic material, a flat surface on the side facing away from the relief structure side of the second plastic material is formed.
- Printing can be done by any printing method. Preference is given to an ink-jet printing process in which overprinting of one and the same location can be carried out repeatedly and thus targeted filling of the "free spaces" contained in the relief structure can be made until a flat coverage of the relief is achieved area.
- other printing methods can also be used to selectively apply the second plastic material to the first transparent layer with the relief structure formed therein.
- the first plastic layer is covered over its entire area with the second plastic material, so that a flat surface is formed on the side facing away from the relief structure.
- Another way of applying the second plastic material is in doctoring.
- Substrate layer to be printed on With such an ink-jet printing method, it is possible to directly print lens structures. This is made possible in particular by the fact that an inkjet printer can print one and the same location on a printed film or substrate layer several times in succession, even at time intervals.
- joined layers and the second plastic material are all made on the basis of the same thermoplastic polymer material or are. These then become monolithic in a high pressure, high temperature lamination process
- Safety composite is made. Polycarbonate safety compounds have proven to be particularly durable and resistant.
- the relief structures are structured such that these each one
- a relief may be structured to include a plurality of cylindrical lens elements that are aligned parallel to one another.
- the individual cylindrical lens elements may be identical or different with respect to the radius of curvature and the distance from each other.
- two different types of cylindrical lenses may be alternately arranged in a pattern.
- Other embodiments include rotationally symmetric lenses that form a two-dimensional regular grid.
- the two relief structures are then coordinated so that they form a common optical structure.
- the surface relief structure and the at least one boundary layer relief structure are matched to one another and additionally to the at least one optically verifiable feature such that they allow a magnification image for at least individual constituents of the at least one optically verifiable feature.
- a plurality of surface lens elements are formed by means of the surface relief structure and by means of
- Boundary layer relief structure a plurality of boundary layer lens elements are formed, wherein at least some surface lens elements of the plurality of
- Boundary layer lens elements is assigned and wherein a focal length of the
- Surface lens element has an opposite sign to a focal length of the associated boundary layer lens element.
- Boundary layer lens elements each aligned with respect to their optical axis register with an optical axis of the surface lens element
- Boundary layer lens elements are assigned. This means that preferably many surface lens elements to which a boundary layer lens element is assigned have a common optical axis with the associated boundary layer lens element. In that each one lens element has a positive focal length and the corresponding other lens element has a negative focal length, can realize novel images.
- Focus of the associated boundary layer lens element coincides. If the focal lengths of the lenses assigned to one another have an opposite sign, an optical structure can be realized in this way, which is also referred to as Galileo telescope.
- the surface relief structure provides a layer or a material region which is bounded by plane-parallel planes, which are oriented substantially parallel to a planar extension of the surface in which the surface relief structure is introduced.
- This material layer is homogeneous and transparent with respect to the refractive index. This means that neither the relief of the boundary layer relief structure nor the relief of the surface relief structure penetrate into this homogeneous and transparent material area. Furthermore, small deviations in the production of a relief structure do not affect the respective other relief structure.
- the surface lens elements have a negative focal length.
- the focal length of the boundary layer lens elements is greater in magnitude than the focal length of the surface lens elements.
- the focal length can on the one hand via a design of the respective boundary layer relief structure or surface relief structure, in particular over a radius of curvature, in the region of the respective lens element and on the refractive index difference at the respective interface, d. H. the surface on which the surface relief structure is formed, or at the boundary layer in the interior of the composite, are influenced.
- the focal length of those lens elements which is a condenser lens represent, ie have a positive focal length, greater than that of each
- associated lens elements which are formed as a converging lens and has a negative focal length.
- the radii of curvature of the lens elements, which are associated with one another, amount in terms of an integer ratio.
- the amount of diverging lens elements is smaller than the focal length of the convergent lens.
- the at least one marking is arranged between the interface relief structure and one of the upper side, in which the surface relief structure is formed, opposite underside in the interior of the composite body. Is the composite body in that area in which the surface relief structure, the boundary layer relief structure and the here between
- Boundary layer lens elements then together with the at least one optically verifiable marking form a so-called internal CLI or MLI, which means that different information contents, which are coded via the at least optically verifiable marking, can be detected under different viewing directions, for example through an underside of the composite body.
- one viewing direction for example, one face image and under a different other viewing direction, one stored in alphanumeric characters
- Magnification property can be used for verification.
- an optical effect is realized in cooperation.
- the boundary layer lens elements an optical effect is realized in cooperation.
- Diffuser lenses which are also called eyepiece lens elements.
- the boundary layer lens elements are then collecting lenses. These are called lens-lens elements.
- a distance is the
- Eyepiece lens elements of the lens-lens elements less than a focal length of the lens lenses. It should be noted that a focal length depends on the
- Refractive indices of the materials on both sides of the relief structure forming the lens elements may be different at the sides of the lens elements.
- the focal length of the lens-lens elements that face the eyepiece lens element is crucial.
- a radius of curvature of the eyepiece lens elements is greater in magnitude than the radius of curvature of the objective lens elements.
- the radius of curvature of the eyepiece lens elements is particularly preferably less than five times the magnitude of the
- the surface lens elements may represent converging lenses, and boundary layer lens elements acting as diverging lenses are formed in the interior of the composite body.
- the at least one optically verifiable marker is aligned with respect to the surface lens elements by an MLI or CLI effect, i. H. one
- the optically verifiable feature comprises characters or symbols with dimensions in the micrometer range.
- the optically verifiable feature is formed with information components in the form of symbols and / or characters whose size is in the micrometer range.
- One advantage is that the optically verifiable feature can be designed so that an information content without the information provided by the boundary layer relief structure and the
- Boundary layer relief structure and the surface relief structure comprises a see-through window
- the optically verifiable feature is designed so that when viewing the optically verifiable feature by the surface relief structure and formed in the interior of the composite body boundary layer relief structure at least an information content of the optically verifiable feature for a human
- Viewer can be detected without an aid containing an imaging optics, which is not detectable when viewed through a side of the composite body provided with surface relief structure without an aid containing an imaging optics.
- the composite body is formed with a see-through window in the region of the optically verifiable feature and the boundary layer relief structure aligned therewith in register and the surface relief structure, and the optically verifiable feature is designed in such a way that when viewed visually
- containing aid is not detectable.
- a layer is incorporated into the security composite body which is opaque in volume, then such a see-through window can be produced, for example, by a large-area punching and insertion of a transparent material to fill the punched-out area.
- Diameters in the micrometer range preferably in the range between 5 and 200 ⁇ , particularly preferably in the range between 10 and 100 ⁇ m, in such an opaque layer. If such apertures are arranged in a grid, transparency can be achieved up to about 60% transmission.
- Openings can in this case be filled by a transparent plastic material, which for example can also be applied to the opaque layer in the area of the openings by a printing process.
- a preparation may be used, as mentioned above in connection with the prior art. Furthermore, with a suitable composition, capillary forces cause the liquid preparation to penetrate the apertures and completely fill them.
- the apertures which have diameters in the micrometer range, are not filled. It has been shown that these are at least not filled by the opaque wall material of the openings in a high-pressure high-temperature lamination process, so that they still allow a review in the finished security composite body. This applies to typical layer thicknesses in the range between 20 ⁇ and about 500 ⁇ suitably selected perforation diameters of the perforation.
- the optically verifiable feature which is introduced into register with the relief structures in the security composite body, is introduced in one embodiment using the relief structures formed by means of a laser marking after assembly using the formed on the surface and inside the composite body relief structures formed optical structures.
- optically verifiable features via a laser marking
- information can also be printed on a printer
- Substrate layer can be applied, which is used to produce the security composite body.
- the information of the optical image is reduced in terms of security against counterfeiting.
- the information on a surface of a substrate layer prior to assembly to the security composite body is not limited to the information on a surface of a substrate layer prior to assembly to the security composite body
- the at least one optically verifiable feature is applied by printing information onto a surface of one of the layers joined to the composite body forming a material layer inside the security composite body ,
- the optically verifiable feature is or is thus formed by means of laser marking in a transparent plastic material and / or introduced by printing technology into the composite body.
- embodiments are also possible in which relief structures in register, both in the top side and the underside of a transparent layer, which are adapted to each other, be embossed.
- the one relief on the upper side and the other relief on the underside are each covered with a plastic material which has a refractive index which differs from the refractive index of the material of the transparent layer.
- the register structures aligned with each other in register, i. the one relief structure and the other relief structure, at the same time preferably structured by means of an ultrasonic embossing process, over two
- Boundary relief structure forming relief structure another, another
- Boundary layer relief structure forming relief structure is formed, which is also covered with the second plastic material or a third plastic material, which has a deviating from the first plastic material refractive index n 3 , so that in the composite by the second plastic material or the third
- Plastic material adapted to the further relief structure further counter-structure is formed. Are the relief structure and the further relief structure both of the Covered second plastic material, the surfaces of the second plastic material, which are remote from the relief structure and the further relief structure, preferably flat and plane-parallel to each other. If a third plastic is used, preferably facing away from the relief structures surfaces of the second plastic material and the third plastic material are flat and plane-parallel to each other.
- Embodiments are also conceivable in which relief structures are embossed into a plurality of transparent films, each of which is covered by a plastic material which has a different refractive index than the material from which the respective layer is made, into which such a relief structure is embossed.
- the provision of a plurality of relief structures on different surfaces of substrate layers, which are then joined together to form the composite body and then arranged inside the document body, is such that optically refractive elements, for example lenses, can be formed, which are higher in otherwise constant geometric relief structures enable refractive optics.
- optically refractive elements for example lenses
- a transparent substrate layer into which a respective relief structure is embossed on both opposite sides has a higher refractive index than the plastic materials covering the relief structures, then the refractive effect of similar surface structures oriented in register is "added.”
- the law of paraxial optics is known to the person skilled in the art. If, for example, cylinder lens structures are embossed on both sides in register, shorter focal lengths can be achieved using the same plastic materials than in an embodiment in which only one side of the plastic layer has a relief structure with cylindrical lens profiles embossed and covered with another plastic.
- Fig. 1 a-1 g are schematic representations for explaining the preparation of a
- Fig. 2 is a schematic representation of an apparatus for producing a
- Fig. 3a-3d, 3f is a schematic sectional view of a production of another
- Fig. 3g is a schematic sectional view through an optical structure
- FIG. 5 shows a further sectional illustration of a safety composite body in which two inner boundary surfaces with a relief structure are formed register-accurate with respect to one another;
- FIG. 6 is a schematic sectional view of a security composite body, in which a see-through window is formed in an opaque layer via openings;
- Fig. 7 is a further schematic sectional view of a
- Safety composite body in which a see-through window is formed over a recess in a full-surface printing
- Fig. 8 is a further schematic sectional view of a
- FIG. 9 is another sectional view of a security composite body, in which on an inner substrate layer by means of a boundary layer relief
- FIG. 10 shows a further sectional view of a security composite body in which boundary layer lens elements in the form of converging lenses are formed on a boundary layer relief and surface lens elements in the form of diverging lenses are formed in register therewith by means of a surface relief;
- 1 1 is a sectional view of another security composite body, in which on an inner substrate layer by means of a boundary layer relief
- Boundary layer lens elements in the form of diverging lenses and in the register hereby by means of a surface relief
- Surface lens elements are formed in the form of converging lenses.
- FIG. 1a shows the provision of a transparent layer 1 of a first plastic material, for example a polycarbonate.
- the layer 1 which is referred to as the substrate layer 1, but may also be made of other plastic materials, in particular transparent thermoplastic material materials. Plastic layers may also be used which comprise only one area that is transparent in volume. Such a layer may be opaque, for example, as a coextruded film of one transparent and one or more
- the transparent layer 1 has an upper side 4 and an opposite lower side 6. These are preferably flat and plane-parallel. The surfaces of the upper side 4 and the lower side 6 may be roughened.
- the transparent layer 1 can be processed, for example, information 2 can be printed. This is shown in Fig. 1 b. It is essential that an area 3 remains transparent.
- a relief structure 5 is then formed. This can be done by different methods, preferably via an ultrasonic embossing process with a structured sonotrode, is coupled into the ultrasound and during the Ultrasonic coupling is pressed with pressure on the surface 4 of the substrate layer 1, so that a relief structure 5 is formed in the transparent region 3. In the top 4 thus a relief structure 5 is formed.
- Substrate layer 1 is preferably flat.
- FIG. 1 c shows the substrate layer 1 provided with the relief structure 5.
- the relief structure 5 is then filled with a second plastic material 1 1, so that it forms a matched to the relief structure 5 counter-structure 15. This condition is shown in Fig. 1d.
- a surface 14 of the second plastic material 11 facing away from the relief structure 5 is planar and preferably plane-parallel to the underside 6 of the substrate layer 1.
- Substrate layer 1 is made, has a different refractive index rii than the second plastic material 1 1. Its refractive index is designated n 2 .
- n 2 refractive index
- a refraction according to the geometrical optics on the relief structure 5 occurs upon the passage of light.
- Plastic material 1 1 thus determines the optical refraction together with the refractive indices and n 2 .
- the relief structure s is formed to form cylindrical lenses.
- the relief structure 5, which defines the relief of the boundary layer 16, is also called boundary layer relief structure in the finished composite body.
- the second plastic material 11 is preferably applied in liquid form to the surface of the first substrate layer 1, for example by means of a printing process or by means of doctoring. In the illustrated embodiment, the second plastic material 1 1 is applied over the entire surface of the top 4 of the first substrate layer 1.
- an additional substrate layer 21 and a further substrate layer 31 are provided.
- the additional substrate layer 21 is in this case printed on a lower side 24 over the entire surface except for a recess region 22. This is positioned so that when joining the layer 21 with the substrate layer 1, on which the second plastic material 1 1 is applied, a view through the substrate layer 21 on the formed refractive structure, which by the
- Boundary layer relief structure 5 is created allows.
- the further substrate layer 31 is designed in this example as a completely transparent layer.
- one is Hologram 41 provided.
- the layers 21, 1, and 31, as well as the hologram 41, are stacked, preferably stapled together, as shown, and then bonded into a composite body 100 in a high pressure, high temperature lamination process, as shown in Figure 1f.
- the substrate layers 21 and 31 are preferably produced on the basis of the same polymer as the layer 1 and the second plastic material 11. This makes it possible to form a monolithic safety composite body 100, in which no phase transitions with respect to the polymer structure in the safety composite body 100 can be recognized at the original boundary layers between the layers 21, 11, 1, 31.
- the refractive indices of the additional layer 21 and the further layer 31 can in principle be chosen arbitrarily. However, these are preferably selected, for example, such that the refractive index is identical to that of the first plastic material. In such an embodiment, only the refractive index n 2 of the second plastic material deviates. This can be chosen, for example, larger than that of the first plastic material. However, embodiments are also conceivable in which the refractive index n 2 of the second plastic material 1 1 is less than that of the first plastic material.
- the refractive index of a plastic material can be adapted by dispersing nanoparticles in the polymer matrix, in particular nanoparticles of transition metal compounds, which themselves are transparent. Titanium dioxide Ti0 2 or zirconium dioxide Zr0 2 are particularly suitable for this purpose.
- a surface relief structure 75 is then impressed in register with the boundary layer relief structure 5 by means of an ultrasound embossing method by means of a structured sonotrode 74 in an upper side 104 of the safety composite body 100.
- Fig. 1 g is indicated that via laser radiation from different directions a and b over the top 104 of the security composite body 100 different information components of an optically verifiable feature 61, which are indicated here by a square and a triangle, in the security composite body 100 means
- Laser marking can be saved.
- the laser light is focused at different locations via the microlenses formed by the surface relief structure 75 and the boundary layer relief structure 5 and causes the plastic material of a material layer 131 to be colored with the original layer 31 corresponds. So the information shares in different places
- Boundary layer relief structure 5 is arranged, this information about the
- Opposite page 106 recognizable as static information viewing angle independent.
- FIG. 2 again schematically illustrates the production method in connection with a production device 200.
- Different substrate layers 21 1, 212, 213, 214, 215 are provided via different rollers 201 - 205. While the substrate layer 215 in the illustrated embodiment is an opaque layer, the substrate layers 21 1 to 214 are each transparent substrate layers.
- the provided as a film substrate layer 214 is also formed as a so-called laserable film, which is designed for laser marking. Via printing devices 221-225, the individual substrate layers 21 1 -215 can be printed on their upper and / or lower sides.
- a relief structure 5 is embossed in an upper side 4 of the substrate layer 213.
- Into the opaque substrate layer 215 is by means of a
- Perforation unit 241 a see-through window in the form of microscopic
- Openings 98 which are formed as through holes, in the
- Substrate layer 215 created.
- a feeder 253 a second
- Plastic material 216 applied to the top 4 of the substrate layer 213, so that the relief structure 5 is completely leveled and covered. This means that the relief structure is completely covered by the second plastic material 216.
- the substrate layers 21 1, 212, 213 are combined with the layer 216 formed thereon and the substrate layers 214, 215 and laminated in a high-pressure high-temperature lamination device 260 to form a composite 270.
- an embossing plate is used, which register exactly in the formed in the interior boundary layer relief structure 5 a surface relief structure 75 at
- an optically verifiable feature 61 is stored in register with the boundary layer relief structure 5 and the surface relief structure 75. These comprise different information portions, which are marked from different laser irradiation directions by utilizing the boundary layer relief structure 5 and the surface relief structure 75 in the interior of the composite 270 in register with it.
- the substrate layer 215 may also be transparent. Of course, in this case, a perforation for forming a see-through window is not necessary.
- Safety composite body 100 isolated from the composite 270. It is understood that only one exemplary embodiment is described and others
- Security features and security elements in the production process can be trained and inserted.
- a number of the layers or films used can also be varied.
- the substrate layer 215 may also be transparent.
- a perforation for forming a see-through window is not necessary.
- a transparent substrate layer is provided, preferably as a foil with an upper side 4 and an underside 6 which is plane-parallel thereto.
- a relief structure 5 forming a lens array is introduced into the upper side 4 of the substrate layer 1, for example embossed or over
- the relief structure 5 is "filled in” and covered with a second plastic material 11, which is preferably printed or latticed in liquid form. This is shown in Fig. 3c.
- the second plastic material 1 1 has a refractive index n 2 , which is different from the refractive index ni of the first plastic material from which the substrate layer 1 consists.
- the plastic materials differ which are produced on the basis of the same polymer, with regard to the concentration of the admixture of, for example, TiO 2 nanoparticles.
- an optically detectable feature 61 for example information in the form of FIG
- Characters which in turn are created from micro-font, applied.
- a color based on polymer as mentioned above, can be used.
- a metal strip having apertures in the form of micro-writing or the like may be applied to the substrate layer 31.
- FIG. 3e shows by way of example how the optically verifiable feature 61 can contain two different information contents. Without an enlargement only the character "A" is perceptible, which represents the first information content 62. When viewed through a magnifying glass 64, another information content "This is an example” 63 is perceptible.
- the character "A” is by the in micro typeface
- a substrate layer 21 is furthermore provided.
- Substrate layer 31 are stacked and stapled in this order, so that the optically verifiable feature 61 and the relief structure 5 are register-aligned.
- a security composite body 100 shown in Fig. 3f is formed.
- the surface relief structure 75 becomes register-accurate with the boundary layer relief structure 5 and the optically verifiable
- beam path 300 is shown by way of example, in which the optical structures of surface relief structure 75 and boundary layer relief structure 5 together form an optical structure for the optically verifiable feature 61.
- Verification over the bottom 106 of the security composite body 100 is the
- FIGS. 1 d, 1 f, 1 g, 2 to 8 show a further embodiment of a security composite body 100, which is produced from a total of five film layers and a layer of the second plastic material applied to the substrate layer 1. It is noted at this point that the layer boundaries shown in FIGS. 1 d, 1 f, 1 g, 2 to 8 are plotted in the respective safety composite body 100 merely for the purpose of illustration and as an indication of the layers used for the production. If these are all produced on the basis of the same polymer, then such layer boundaries in the composite body are not identifiable on the basis of the plastic structure but at most on the basis of other properties, such as the refractive index, transparency, applied printing information, or admixtures of substances, for example photosensitizers or the like.
- FIG. 5 shows an embodiment in which relief structures 5 and 5 'are formed in the substrate layer 1 both on the upper side 4 and on the lower side 6.
- the top 4 is covered with a second plastic material 1 1 and the bottom 6 with a third plastic material 81st Indicates the first plastic material of the
- Substrate layer 1 has a refractive index, so in one embodiment, the refractive indices of the second plastic material n 2 and the third plastic material n 3 are chosen so that these are both smaller than the refractive index. In another embodiment, this ratio can be reversed so that the
- Refractive indices n 2 , n 3 is greater than the refractive index of the first plastic material.
- Plastic material 81 substrate layers 21 and 31 are formed, which are each capable of laser.
- a further substrate layer 91 is formed on an upper side 4 of the safety composite body 100 and another on the underside 6
- Substrate layer 92 In the security composite body 100, of course, further security features may be formed, which are not shown for reasons of simplicity. It is advantageous if, through all the substrate layers 1, 21, 31, 91, 92 and the plastic materials 1 1 and 81 in the region in which the relief structures 5, 5 'are formed, a view through the security composite body 100 is possible.
- Fig. 6 is a section through a further embodiment of a
- the substrate layer 1 is only at its
- Upper side 4 formed with a relief structure 5, via which a second plastic material 1 1 is superimposed.
- a laser-capable substrate layer 21 and an upper cover layer 91 are arranged.
- Under the bottom 6 of the substrate layer 1 is a laser-capable substrate layer 31, an opaque substrate layer 93 and a lower
- Protective layer 92 is arranged. In the opaque substrate layer 93, a plurality of openings 98 is formed, so that in the opaque substrate layer 93 in the region 99, in which the relief structure 5 is formed, a view through the
- Safety composite 100 is possible.
- the security feature 61 is in the
- Substrate layer 31 formed by laser marking.
- a further embodiment is shown, which is similar to that of FIG. 5.
- This embodiment differs from that according to FIG. 5 in that the security feature is applied by printing technology to an underside of the substrate layer 31, which in this case does not have to be laser-capable.
- the upper side of the lowermost substrate layer 92 is printed over its entire area except for a recess 97 with opaque ink 96, which makes it possible to see through the relief structures 5 and 5 'the security feature 61.
- This safety composite body 100 thus has a printed-through window produced by printing. In addition, this is
- Security composite body another security element 85, for example a
- Microchip inserted as an example.
- FIG. 8 schematically shows a sectional view through a further embodiment of a safety composite body 100.
- the relief structure 5 is formed in the top 4 of the substrate layer 1 so that the
- Relief structure is formed completely below a level 8, which is defined by the top 4 of the substrate layer.
- a level 8 which is defined by the top 4 of the substrate layer.
- Such an embodiment can be realized for example by means of a laser ablation process for structuring the relief.
- Other possible embodiments provide that in the area in which the relief structure is to be formed, first material from the
- the relief structure 5 can be formed via a sonotrode embossing.
- a further substrate layer 21, which is laser-capable, is arranged above. Below the substrate layer 1 are a
- the layer 31 could also be saved and the optically verifiable feature 61 printed on the bottom 4 in register with the relief structure.
- the printing can take place before the formation of the relief structure. This can then be stamped register-accurate adapted to the printing.
- FIG. 9 schematically shows a further embodiment of a safety composite body 100 as a sectional view.
- a material layer which is formed from a substrate layer 1, has a surface relief structure 5, which is preferably embossed into the substrate layer by means of a sonotrode.
- An example scribed or printed layer 1 1 has a calculation index, which of the
- Substrate layer 1 deviates and is preferably lower. In this case, the
- optically verifiable feature 61 formed with an aligned in register and associated therewith boundary layer lens element 7, an optical structure of a Galilean telescope.
- the optically verifiable feature 61 can be considered enlarged. If the optically verifiable feature 61 is not completely opaque, then it is also possible to use the opposing side 106 arranged objects (not shown) by the security composite body 100 from the top 104 are considered enlarged. A presence of this effect can be used to derive a verification decision.
- FIG. 10 schematically shows a sectional illustration of a further safety composite body 100, in which boundary layer lens elements 7 in the form of converging lenses and in register with a surface relief 75 surface lens elements 77 are formed by diverging lenses. Between the boundary layer relief structure 5 and the bottom 106, an optically verifiable marking 61 is arranged.
- first depressions are preferably impressed by means of a suitably shaped sonotrode, which are filled with plastic material 1 1 or be, which has a higher refractive index than the substrate layer 1.
- boundary layer lens elements 7 in the form of converging lenses are formed on the boundary layer relief structure 5.
- the individual information components of the optically verifiable marking 61 which are indicated here by means of squares and triangles, can be detected dependent on the viewing direction as a function of that of the upper side 104 under different viewing directions a, b.
- Diverging lenses trained surface lens elements 77 are formed with the formed in the form of collimating lenses boundary layer lens elements 7, can be viewed enlarged by the top 104 and a spaced from the opposite side 106 object 430, which is here in the form of a letter "A".
- 1 1 is a sectional view of a further security composite body, in which on an inner substrate layer 1 by means of a boundary layer relief structure. 5
- the introduced into the substrate layer 1 relief structure 5 is covered with a plastic material 1 1, which has a higher refractive index than the substrate layer 1.
- a surface relief structure 75 is formed which Surface lens elements 77 forms in the form of converging lenses.
- Boundary layer lens element 7 are formed in the form of a diverging lens, are increased, so that the optically verifiable feature at a greater depth, as viewed from the top 104, can be arranged for optimal viewing.
- the viewing angle-dependent feature can thus over almost the entire
- Material thickness 500 of the safety composite body 100 are distributed. Protection against delamination and manipulation thus increases.
- the see-through window can be formed by means of perforation or even by introducing a large recess, which is filled, for example, via insertion of another plastic material, into one of the further layers.
- the optically verifiable feature forming first information by printing technology in
- Safety composite is stored. All combinations of laser marking and print marking can be used in combination. Over a
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- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Laminated Bodies (AREA)
- Credit Cards Or The Like (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012204343A DE102012204343A1 (de) | 2012-03-19 | 2012-03-19 | Verfahren zur Herstellung eines Sicherheitsverbundkörpers und Sicherheitsverbundkörper mit zwei optisch brechenden Strukturen |
| PCT/EP2013/055588 WO2013139749A1 (de) | 2012-03-19 | 2013-03-18 | Verfahren zur herstellung eines sicherheitsverbundkörpers und sicherheitsverbundkörper mit zwei optisch brechenden strukturen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2828094A1 true EP2828094A1 (de) | 2015-01-28 |
| EP2828094B1 EP2828094B1 (de) | 2016-03-16 |
Family
ID=47884381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13709481.9A Active EP2828094B1 (de) | 2012-03-19 | 2013-03-18 | Verfahren zur herstellung eines sicherheitsverbundkörpers und sicherheitsverbundkörper mit zwei optisch brechenden strukturen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2828094B1 (de) |
| CN (1) | CN104395095B (de) |
| DE (1) | DE102012204343A1 (de) |
| WO (1) | WO2013139749A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015010811A1 (de) * | 2015-08-21 | 2017-02-23 | Veridos Gmbh | Mehrschichtiger Datenträger mit flächigem Durchsichtsfenster |
| CN106597581A (zh) * | 2015-10-14 | 2017-04-26 | 昇印光电(昆山)股份有限公司 | 微光学成像薄膜及成像装置 |
| GB2549779B (en) * | 2016-04-29 | 2020-05-20 | De La Rue Int Ltd | Security elements and methods of manufacture thereof |
| GB2549780B (en) * | 2016-04-29 | 2019-11-27 | De La Rue Int Ltd | Methods of manufacturing lens transfer structures |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216947B1 (de) | 1985-10-01 | 1991-01-02 | Maurer Electronics Gmbh | Kartenförmiger Datenträger und Verfahren zu seiner Herstellung |
| EP0219012B1 (de) | 1985-10-15 | 1993-01-20 | GAO Gesellschaft für Automation und Organisation mbH | Datenträger mit einem optischen Echtheitsmerkmal sowie Verfahren zur Herstellung und Prüfung des Datenträgers |
| KR100302227B1 (ko) * | 1993-09-30 | 2001-11-22 | 유모토 히로카즈 | 렌즈의제조방법,렌즈부설물의제조방법,렌즈부설물,경계선형성용수지조성물및,렌즈-형성용수지조성물 |
| DE4421561A1 (de) | 1994-06-20 | 1995-12-21 | Bayer Ag | Hochtemperaturbeständige flexible Siebdruckfarben |
| PT1322480E (pt) | 2000-10-05 | 2007-01-31 | Trub Ag | Suporte de gravação |
| CN100473538C (zh) * | 2004-05-28 | 2009-04-01 | 联邦印刷有限公司 | 有价及安全文件及其制造方法 |
| DE102005028162A1 (de) * | 2005-02-18 | 2006-12-28 | Giesecke & Devrient Gmbh | Sicherheitselement und Verfahren zu seiner Herstellung |
| US20070098959A1 (en) * | 2005-06-03 | 2007-05-03 | Daniel Lieberman | Substrates and articles having selective printed surface reliefs |
| DE102007012696A1 (de) * | 2007-03-13 | 2008-09-18 | Bundesdruckerei Gmbh | Sicherheits- und/oder Wertdokument mit zumindest zwei verschiedenen registergenau positionierten Sicherheitsmerkmalen |
| DE102007052948A1 (de) | 2007-10-31 | 2009-05-07 | Bayer Materialscience Ag | Verfahren zur Herstellung eines Polycarbonat-Schichtverbundes |
| DE102007052847A1 (de) | 2007-11-06 | 2009-05-14 | Bayerische Motoren Werke Aktiengesellschaft | Verpolschutzschaltung und Verfahren zum Bereitstellen eines Verpolschutzes |
| DE102008008044B4 (de) | 2008-02-05 | 2022-09-22 | Bundesdruckerei Gmbh | Verfahren zum Prägen von Oberflächenstrukturen in einem Substrat zur Herstellung eines kartenförmigen Datenträgers |
| DE102008012436A1 (de) * | 2008-02-29 | 2009-09-03 | Bundesdruckerei Gmbh | Sicherheits- und/oder Wertdokument |
| DE102008031653A1 (de) | 2008-07-03 | 2010-01-14 | Bundesdruckerei Gmbh | Verfahren und Vorrichtung zum Einbringen eines Sicherheitsmerkmals in ein Wert-oder Sicherheitsdokument |
| DE102009032697C5 (de) * | 2009-07-09 | 2020-03-05 | Ovd Kinegram Ag | Mehrschichtkörper |
| GB201003397D0 (en) * | 2010-03-01 | 2010-04-14 | Rue De Int Ltd | Moire magnification security device |
| DE102010055689A1 (de) * | 2010-12-22 | 2012-06-28 | Giesecke & Devrient Gmbh | Mikrooptische Betrachtungsanordnung |
-
2012
- 2012-03-19 DE DE102012204343A patent/DE102012204343A1/de not_active Withdrawn
-
2013
- 2013-03-18 WO PCT/EP2013/055588 patent/WO2013139749A1/de not_active Ceased
- 2013-03-18 CN CN201380014756.5A patent/CN104395095B/zh active Active
- 2013-03-18 EP EP13709481.9A patent/EP2828094B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013139749A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013139749A1 (de) | 2013-09-26 |
| CN104395095A (zh) | 2015-03-04 |
| EP2828094B1 (de) | 2016-03-16 |
| DE102012204343A1 (de) | 2013-09-19 |
| CN104395095B (zh) | 2017-03-08 |
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