EP2005258A1 - Support d'enregistrement pourvu d'une caractéristique de sécurité et procédé de fabrication d'un support d'enregistrement pourvu d'une caractéristique de sécurité - Google Patents

Support d'enregistrement pourvu d'une caractéristique de sécurité et procédé de fabrication d'un support d'enregistrement pourvu d'une caractéristique de sécurité

Info

Publication number
EP2005258A1
EP2005258A1 EP07723879A EP07723879A EP2005258A1 EP 2005258 A1 EP2005258 A1 EP 2005258A1 EP 07723879 A EP07723879 A EP 07723879A EP 07723879 A EP07723879 A EP 07723879A EP 2005258 A1 EP2005258 A1 EP 2005258A1
Authority
EP
European Patent Office
Prior art keywords
storage medium
feature
observable
functional layer
medium according
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.)
Ceased
Application number
EP07723879A
Other languages
German (de)
English (en)
Inventor
Stefan BORGSMÜLLER
Steffen Noehte
Kay Schulte-Wieking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scribos GmbH
Original Assignee
Tesa Scribos GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tesa Scribos GmbH filed Critical Tesa Scribos GmbH
Publication of EP2005258A1 publication Critical patent/EP2005258A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/0005—Adaptation of holography to specific applications
    • G03H1/0011—Adaptation of holography to specific applications for security or authentication
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/0252—Laminate comprising a hologram layer
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/024—Hologram nature or properties
    • G03H1/0244—Surface relief holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/08—Synthesising holograms, i.e. holograms synthesized from objects or objects from holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/18—Particular processing of hologram record carriers, e.g. for obtaining blazed holograms
    • G03H2001/187—Trimming process, i.e. macroscopically patterning the hologram
    • G03H2001/188—Demetallisation, i.e. removing the enhancing metallic layer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H2001/2223—Particular relationship between light source, hologram and observer
    • G03H2001/2231—Reflection reconstruction
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H2001/2223—Particular relationship between light source, hologram and observer
    • G03H2001/2234—Transmission reconstruction
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2249—Holobject properties
    • G03H2001/2284—Superimposing the holobject with other visual information
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2210/00—Object characteristics
    • G03H2210/50—Nature of the object
    • G03H2210/54—For individualisation of product
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/40—Printed information overlapped with the hologram
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2260/00—Recording materials or recording processes
    • G03H2260/50—Reactivity or recording processes
    • G03H2260/62—Direct etching

Definitions

  • a storage medium comprising: a security feature and a method of manufacturing a storage medium having a security feature
  • the invention relates to a storage medium with a security feature and to a method for producing a storage medium with a security feature.
  • Security features known from the prior art can be formed, for example, from computer-generated holograms which consist of one or more layers of dot matrices which, when illuminated with a preferably coherent light beam, lead to a reconstruction of the information encoded in the hologram.
  • the point distribution can be calculated as an amplitude hologram, phase hologram or as a kinoform, Fourier or Fresnel hologram.
  • these are first calculated and then written with a suitable writing device by point-wise introduction of energy into a storage medium.
  • the resolution of the resulting dot matrix can be in the range below 1 ⁇ m.
  • holograms with a high resolution can be written in a small space, the information of which can only be read out by illuminating with a light beam and reconstructing the diffraction image.
  • the size of the holograms can be between less than 1 mm 2 and several 1 cm 2 .
  • a structuring of the type described above can also be referred to as microstructuring.
  • the computer-generated holograms described above can be combined with directly visible information (microprint, microimages, encoded information).
  • a plurality of writing devices for writing computer-generated holograms are known from the prior art, which write in planar storage media the optical structures of the holgrams.
  • writing devices for writing computer-generated holograms are known from the prior art, which write in planar storage media the optical structures of the holgrams.
  • Such writing devices are also referred to as laser lithographs or as lithographic systems.
  • a plurality of reading devices are known, which are suitable for illuminating the hologram surface by means of a light beam and a suitable optical system to make the reconstruction visible or electronically representable and evaluable by means of recording means.
  • a suitable optical system to make the reconstruction visible or electronically representable and evaluable by means of recording means.
  • Visible light diffractive structures are therefore widely known and are - as already stated - used as security features, as their counterfeiting means a considerable technical effort, since they are constructed of structures whose structure sizes are in the range of optical wavelengths. Such structures are usually realized as reflective structures. However, they can also be realized as a transmittively observable / readable structure.
  • the invention is based on the technical problem of specifying a method for producing a storage medium with a security feature as well as a storage medium with a security feature, wherein a greater variety of combinations of different security features is made possible.
  • a storage medium with a security feature with a substrate, with at least one functional layer, with at least one feature inscribed in the functional layer and observable in reflection, and with at least one feature inscribed in the functional layer and observable in transmission, wherein at least one Feature is individualized and wherein at least one feature has a diffractive structure.
  • a method for producing a storage medium having a security feature in which at least one feature observable in reflection, ie a structure and / or information content that is reflectively diffractive or reflectively observable by brightness modulation, can be observed in at least one functional layer of the storage medium
  • Storage medium is written, in which in the at least one functional layer of the storage medium at least one observable in transmission feature, ie a transmissive diffractive or transmissive observable by brightness modulation structure and / or information content is written, wherein at least one feature is customized and wherein at least one feature is inscribed as a diffractive structure.
  • the features are inscribed as microstructures in the storage medium.
  • different microstructures observable in reflection and transmission are contained in a functional layer of a storage medium or can be inscribed with the same production process.
  • Diffractive structures can be simple grid arrangements, complex grid arrangements or holograms.
  • the inventive method thus allows several different ways of storing and reading information in one and the same material. It can be stored by each individual storage a separate individual information.
  • individual information for example, any information is understood that refers to one or more properties of the object on which the storage medium is to be attached as a security feature. Examples of such properties are serial numbers or manufacturing data.
  • the shape of the stored information of the different memory types may be e.g. consist of one or more types, and may e.g. digital data, text, numbers, serial numbers, images, faces, logos or patterns.
  • Typical ways of reading the information stored in different ways may be e.g. be:
  • Security features provide increased security against counterfeiting, since different types of memory are realized in the same storage medium and even to a and the same place, which, due to the increased complexity of the production of such objects, represents a strong technical hurdle for counterfeiting attempts.
  • the combination of memory types that require reading a special device, in combination with easy-to-check information content is a combination of memory types that realizes several levels of security in the same object and thus advantages over previously known security features shows, as these often only provide information at a security level.
  • Such a combination of security levels is preferably that at least one feature is a level 1 security feature and at least one feature is a level 2 or level 3 security feature.
  • a level-1 security feature is a feature that is visible to the naked eye and that can be verified without additional aids, here for example gray scale images that can be read in transmission with daylight.
  • a level 2 security feature is a feature that is verifiable with simple or standard tools (e.g., a magnifying glass, a UV lamp, a bar code reader).
  • a level 3 security feature is a feature that is verifiable only with specialized equipment. In particular, the storage of holographic digital data can be done as a level 2 security feature or as a level 3 security feature.
  • the invention further describes a storage medium suitable for producing such structures in a lithographic process utilizing laser radiation.
  • a storage medium suitable for producing such structures in a lithographic process utilizing laser radiation.
  • 1 shows a schematic structure of a storage medium
  • FIG. 2 shows the storage medium shown in FIG. 1 with different inscribed structures
  • FIG. 3 shows the storage medium shown in FIG. 1 with various inscribed structures
  • FIG. 4 shows an exemplary embodiment of a combination of a hologram structure written in type 2 with a lattice structure in the form of a type Ib lettering in transmitted light against a light background
  • FIG. 5 shows the combination shown in FIG. 4 in reflection
  • FIG. 6 shows an exemplary embodiment of a combination of a hologram structure written according to type 2 and a digit or graphical elements in the form of different grating structures according to Typlb in transmitted light against a light background.
  • FIG. FIG. 7 shows the combination shown in FIG. 6 in reflection, FIG.
  • FIG. 8 shows an exemplary embodiment of a combination of overlapping areas with different information contents in a transmittive observation against a light background, wherein a vertical dark bar can be seen on a light background
  • Fig. 9 taken the combination shown in Fig. 6 in reflection, wherein a bright horizontal bar can be seen on a dark background.
  • a storage medium shown in Fig. 1 consists in its simplest form of a polymer film 1, preferably a stretched polymer film which is at least partially transparent to visible light, and at least one functional layer 2, which absorbs the laser radiation during the lithographic writing process and is at least partially transparent. Between the film 1 and the functional layer 2, no further layers are preferably arranged. In addition, a further additional layer 3 can be present on the functional layer 2.
  • the lithographic writing is carried out in FIG. 1 from below through the film 1 onto the functional layer 2 or else from above onto the functional layer 2 through the optional additional layer 3.
  • the additional layers 3 may be lacquers, protective layers, polymer layers, transparent glasses, crystalline layers, semiconductors, antireflection layers or further functional layers.
  • a lithographic process or writing process can be carried out through the film 1 onto the functional layer 2 or, alternatively, through additional layers 3 directly onto the functional layer 2.
  • the functional layer 2 has inter alia the task of at least partially absorbing the laser radiation and convert it into heat and at least partially deliver it to the film 1.
  • FIGS. 2 and 3 show various types of structures which can be produced in a lithographic process or writing process using, for example, laser radiation.
  • the structure of the storage medium essentially corresponds to that of the storage medium shown in FIG. 1, consisting of the film 4 or 10, the at least one functional layer 5 or 11 and the optional additional layer 6 or 12.
  • a focused laser beam is generated by a short laser pulse (or several consecutive pulses) a small structure in the storage medium which, along with many such written structures, gives the desired diffractive or holographic or directly visible overall structure.
  • structure 7 represents a structure of type la +
  • structure 8 represents a structure of type lb +
  • structure 9 represents a structure of type 2.
  • the structure 13 represents a structure of type Ia
  • the structure 8 represents a structure of type Ib
  • the structure 9 represents a structure of type 3.
  • FIG. 2 shows, on the one hand, relief formations of a certain height on the basis of the structure 7 as an increase of the film surface of the type la + and on the basis of the structure 8 an increase of the film surface of the type 1b + with a greater height than in the structure 7 with the type la +.
  • a removal of the at least one functional layer 5 by the example of the structure 9 corresponds to the type 2, which in the case that one of the functional layers 5 is a metal layer, a demetallization.
  • FIG. 3 shows relief patterns on the basis of the structure 13 with type Ia and on the basis of the structure 14 with type Ib, similar to the types Ia + and Ib +, but in the form of a depression of the film surface.
  • FIG. 1 shows, on the one hand, relief formations of a certain height on the basis of the structure 7 as an increase of the film surface of the type la + and on the basis of the structure 8 an increase of the film surface of the type 1b + with a greater height than in the structure 7 with the type la +.
  • the structure 3 also shows a structure formation in the form of the structure 3 with type 3, which changes the phase of the light when illuminated with a reading beam.
  • the structure 15 may be formed, for example, in the form of a refractive index change of the film 10.
  • a type 3 structure may also be a gas bubble formed by the exposure process.
  • thermodynamic behavior of the film and the functional layer (s) may be formed in the film or demetallisations or structural changes of the Type 3 can be achieved.
  • the total energy of a single laser write pulse can serve this purpose in a lithographic process.
  • different energies can be introduced into the storage medium with different lengths of laser pulses. Short pulses produce low energies, middle pulses medium energies and long pulses generate high energies. This allows both the type of exposure and the severity, i. Within certain limits, the size of the exposed point can be influenced.
  • Structures of the type Ia ie low relief formations can be generated with low energies.
  • Structures of the type Ib, ie strong relief formations can be generated with medium energies.
  • Type 2 structures, ie demetallizations, and type 3 structures can be generated at high energies.
  • suitable laser lithographs (diffraction-limited, 100-100 nm laser power in the visible or IR, UV range) with the same material and one and the same laser power types Ia, Ib and 2 can be generated with laser pulse lengths of 150ns, 300ns and 600ns.
  • the laser power can be used in a lithographic process.
  • the laser power can be used in a lithographic process.
  • the number of individual pulses can be used in a lithographic process.
  • pulses of equal energy e.g. a type Ia structure is generated with a pulse, a type Ib structure with a double pulse (2 pulses with a short pause), and a type 2 or type 3 structure with a triple pulse.
  • Relief formations (structures of the types Ia, Ib) have an influence on the phase of the light during readout in reflection and are thus diffractive phase patterns. In transmission they do not act or hardly.
  • Phase changes in the film or bubbles lead to phase influence in reflection and transmission.
  • Demetallizations (structures of type 2) have an influence on the amplitude of the light both during reading in reflection and during reading in transmission and are thus diffractive amplitude patterns.
  • a memory material can be described lithographically with a structure according to type Ia with the following properties:
  • Holographic structures can be read in reflection with a suitable device. Relief formations in transmittive illumination lead to almost no diffraction or to diffraction effects with negligible diffraction efficiencies.
  • a memory material can be described lithographically with a structure according to type Ib with the following properties:
  • Holographic structures can be read in reflection with a suitable device and diffract more than type Ia structures.
  • a memory material can be described lithographically with a structure according to type 2 with the following properties:
  • Holographic structures can be read in reflection with a suitable device.
  • Holographic structures can be read out in transmission with a suitable device or the naked eye by means of a suitable light source.
  • a memory material can be described lithographically with a structure according to type 3 with the following properties:
  • Lattice structures lead to diffraction phenomena when viewed in transmission.
  • Holographic structures can be read in reflection with a suitable device.
  • Holographic structures can be read out in transmission with a suitable device or the naked eye by means of a suitable light source.
  • holographic structures can contain digital data, texts, numbers, serial numbers, images, faces, logos, patterns, encoded data, etc. in their reconstruction.
  • Identical data contents can be generated by diffractive structures as diffraction patterns.
  • information contents can be generated by demetalization as gray value images, which are viewed in a transmissive arrangement.
  • Different information contents can be combined with each other. It is thus known, for example, that pictorial information, for example a face, is combined with a hologram in such a way that the face can be seen when viewed in reflection with the naked eye, but the same structure is also present when reading in reflection with the aid of a corresponding reading device contains holographic information.
  • FIG. 4 shows by way of example that a hologram structure 17 written in type 2 can be combined with a lattice structure 18 in the form of a lettering according to type Ib. The hologram structure therefore appears bright in transmission, the lettering in transmission dark.
  • FIG. 5 shows a hologram 19 which has been written after type 2 and a text 20 as lattice structure according to type Ib.
  • the illustration in FIG. 5 is taken in reflection.
  • the non-demetallized areas containing gratings appear bright.
  • Fig. 5 shows that, viewed in reflection, the lettering appears bright on the diffuse hologram background due to the diffraction.
  • FIG. 6 shows a similar combination as in FIG. 4.
  • a hologram 21 is of type 2 and a number 22 or graphical elements 22 are inscribed as different lattice structures of type Ib.
  • Fig. 6 shows a representation taken in transmitted light against a light background. The non-demetallized areas appear dark.
  • the regions 22 which can be identified as dark in FIG. 6 contain different grating structures. Here, however, holographic structures written by type Ib could also be located. Again, the hologram structure 21 appears bright in transmission, the graphical elements 22 dark in transmission.
  • FIG. 7 shows a type 2 hologram 23 and a number or graphic elements 24 as different lattice structures according to type Ib.
  • the illustration of FIG. 7 is taken in reflection.
  • the non-demetallized areas containing grids appear bright and colored, with the different colors shown as gray levels in the illustration.
  • the graphic elements 24 contain different diffraction gratings.
  • the holographic information from 21 or 23 can be read out both in transmission and in reflection with a corresponding reading device.
  • FIG. 8 shows a functional example, which makes it clear that surfaces with different
  • FIG. 8 consists of 6 regions 25, 26, 27, 28, 29 and 30, wherein the areas 28 and 29 are generated identically, as well as the areas 26 and 30.
  • the region 25 contains holographic information, written in type 2.
  • the regions 28 and 29 contain a type 2 lattice structure, i. these areas appear bright in transmissive observation in FIG.
  • the regions 26 and 30 contain the same holographic information as the region 25, however, the regions 26 and 30 are generated by type Ib.
  • the region 27 contains a lattice structure written according to type Ib, i. these areas appear dark in transmissive observation in FIG.
  • Fig. 9 shows in reflective observation that the bright diffractive structure of the regions 33, 34 and 35 can be clearly seen, these being produced according to two different types.
  • the hologram area 31, 32 and 36 can be recognized as a gray background. As a result, a bright horizontal bar can be seen in reflection.
  • the examples from FIGS. 8 and 9 in particular show that metallized and non-metallized as well as diffractive and non-diffractive regions can overlap.
  • a visible in reflection information may consist of a grid orientation, which, however, was generated according to different types and thus in transmittive viewing does not have to show the same visible information.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacturing & Machinery (AREA)
  • Holo Graphy (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

La présente invention concerne un support d'enregistrement pourvu d'une caractéristique de sécurité, lequel support présente un substrat (1, 4, 10), au moins une couche fonctionnelle (2, 5, 11), au moins une caractéristique inscrite dans cette couche fonctionnelle (2, 5, 11) et pouvant être observée en réflexion ainsi qu'au moins une caractéristique inscrite dans ladite couche fonctionnelle (2, 5, 11) et pouvant être observée en transmission, au moins une caractéristique étant individualisée et au moins une caractéristique présentant une structure diffractante. Une solution est ainsi apportée au problème technique rencontré lorsqu'il s'agit de fournir une plus grande pluralité de combinaisons de caractéristiques de sécurité différentes. Cette invention concerne également un procédé de fabrication d'un support d'enregistrement pourvu d'une caractéristique de sécurité.
EP07723879A 2006-04-04 2007-04-02 Support d'enregistrement pourvu d'une caractéristique de sécurité et procédé de fabrication d'un support d'enregistrement pourvu d'une caractéristique de sécurité Ceased EP2005258A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006015610 2006-04-04
DE102006032538A DE102006032538A1 (de) 2006-04-04 2006-07-13 Speichermedium mit einem Sicherheitsmerkmal sowie Verfahren zur Herstellung eines Speichermediums mit einem Sicherheitsmerkmal
PCT/EP2007/002938 WO2007115720A1 (fr) 2006-04-04 2007-04-02 Support d'enregistrement pourvu d'une caractéristique de sécurité et procédé de fabrication d'un support d'enregistrement pourvu d'une caractéristique de sécurité

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US (1) US8248908B2 (fr)
EP (1) EP2005258A1 (fr)
CN (1) CN101405663B (fr)
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CN101405663B (zh) 2013-04-03
WO2007115720A1 (fr) 2007-10-18
US20090016208A1 (en) 2009-01-15
DE102006032538A1 (de) 2007-10-11
CN101405663A (zh) 2009-04-08
US8248908B2 (en) 2012-08-21

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