WO2011104330A1 - Dispositif de marquage et procédé de marquage haute résolution de documents de valeur ou de sécurité - Google Patents

Dispositif de marquage et procédé de marquage haute résolution de documents de valeur ou de sécurité Download PDF

Info

Publication number
WO2011104330A1
WO2011104330A1 PCT/EP2011/052800 EP2011052800W WO2011104330A1 WO 2011104330 A1 WO2011104330 A1 WO 2011104330A1 EP 2011052800 W EP2011052800 W EP 2011052800W WO 2011104330 A1 WO2011104330 A1 WO 2011104330A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser light
security document
value
marking
laser
Prior art date
Application number
PCT/EP2011/052800
Other languages
German (de)
English (en)
Inventor
Steffen Baudach
Original Assignee
Bundesdruckerei 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 Bundesdruckerei Gmbh filed Critical Bundesdruckerei Gmbh
Priority to CN201180011261.8A priority Critical patent/CN102858552B/zh
Priority to EP11707385.8A priority patent/EP2539155B9/fr
Publication of WO2011104330A1 publication Critical patent/WO2011104330A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
    • B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing

Definitions

  • the invention relates to a method for marking value or security documents and a marking device, which are designed for permanently marking a value or security document with the aid of laser light.
  • Security documents are those documents and objects that are protected by at least one security feature or security element against a
  • Security documents that embody a value are also referred to as value documents.
  • Security documents include, for example, identity documents, driver's licenses or motor vehicle papers and documents of value, with value documents, for example banknotes, postage stamps or checks.
  • security documents or value documents it is advantageous to be able to mark these permanently, preferably individually.
  • Different methods are known from the prior art, with which value and / or security documents can be marked individually.
  • most value and security documents have been paper-based and, in particular, have been customized by means of printing techniques, modern security documents and value documents are often at least partially made from plastic materials.
  • Modern identity cards and driving licenses are used, for example, as lamination bodies made of several layers of plastic and
  • Plastic layers which consist for example of polycarbonate, special
  • Pigment substances added at least in individual layers to be later marked with a laser do not affect transparency in the visible optical range or are not or barely perceptible to a user. If such a layer is irradiated with laser light of sufficient intensity, an increased absorption of the laser light occurs at the pigments. This makes it possible to use energy in the otherwise coupling transparent plastic, which then leads over the amount of energy deposited here to a local color, for example via heating and a partial carbonization of the plastic material. Depending on the imported
  • Amount of energy can be set to a degree of blackening of the plastic targeted. From individual local pixels, patterns, in particular grayscale images, lettering and other characters, can be permanently marked in the value or security document.
  • a card-shaped data carrier consisting of at least one layer in which visually readable information in the form of a change in the optical properties due to an irreversibly caused by a laser beam material change are introduced, the absorption capacity of this layer for at least a wavelength due to the laser radiation is at least partially reduced.
  • original colored or opaque layers are "bleached" in terms of absorption.
  • DE 30 48 733 A1 discloses an identification card and a method for producing such an identification card with information applied in the form of patterns
  • the ID card has differently colored, stacked on at least one surface
  • Personalization data is interrupted. It is envisaged that the information by the action of a controlled laser beam on one or more on one
  • Plastic carrier one above the other applied color layers are displayed. As a result of the laser irradiation, the color can be changed locally.
  • a method for producing an object with a colored mark by irradiating the surface of the object with laser light in the form of the mark, wherein the object consists of a plastic composition in at least the area where the mark is applied containing at least three color-forming components which lose their color-forming ability under the influence of laser light selected and present in a concentration such that at each wavelength between 400 and 700 nm at least part of the amount of incident light is absorbed,
  • the wavelength of the laser light subsequently set to a value which depends on the selected color and the surface of the object is then irradiated with the laser light.
  • WO 01/28778 A2 discloses a method for applying colored characters on a data carrier, preferably made of plastic, known by means of a laser system, wherein in at least one surface layer and / or near-surface layer of the data carrier introduced latent pigments in which by energetic excitation a Changing the absorption behavior is carried out at the designated areas of the data carrier by laser irradiation, which is in the IR and / or visible range, energetically excited in such a way that the same pigments
  • near-surface layer has at least two different coloring particles that change the color of this layer under the influence of laser radiation, wherein the laser radiation is used with at least two different wavelengths to change the color of this layer, the application of the object with
  • At least one beam guiding means to a first laser beam with the wavelength ⁇ and at least one further laser beam having a wavelength ⁇ 2 , which is different from the wavelength of the first laser beam, to lead to the layer of the object via the two-coordinate beam deflection device and the focusing device.
  • the data carrier comprises a visually or machine recognizable marking in the form of a pattern of letters, numbers or pictures.
  • a data carrier with a data carrier substrate comprises a visually or machine recognizable marking in the form of a pattern of letters, numbers or pictures.
  • the marking is introduced into the marking layer by means of short laser pulses.
  • the security marker includes a visually invisible
  • Diffraction structure inside a transparent polymer produced by multiphoton absorption using ultrashort pulses of a femtosecond laser.
  • the diffraction structure is in the volume of the polymer over
  • Refractive index changes generated are in the submicrometer range.
  • structures can be generated via multiphoton ablations, the extension of which also lies in the submicrometer range.
  • a readout of the diffraction structure is done with low-power lasers and can be done in transmission or reflection.
  • the pigments to be ablated are generally mixed with pigments or other additives which facilitate laser light absorption.
  • the technique usually limits an achievable resolution with regard to the marking produced by the fact that the interaction between the laser light and the value or security document is based on thermal effects.
  • the invention is based on the object, an improved method and an improved device for permanently marking value or
  • the basic idea of the invention is the marking of the value and / or
  • Laser light pulses have a pulse duration of less than 100 picoseconds, preferably less than 10 picoseconds.
  • An advantage of using short-pulse laser light is that intensity densities can be achieved with this light, which can also trigger non-linear optical interactions. By way of example, this makes it possible to produce markings with a higher resolution, since thermal interaction processes, which are always associated with a dissipation of the heat into surrounding areas, and in this case a resolution limitation
  • Pigment additives or the like are prepared. Nonlinear effects are exploited here. This gives a greater material independence in the marking. Likewise, diffractive structures can be marked directly in documents. It should be emphasized that a visual impairment of areas adjacent to the introduced markings is omitted. Particularly advantageous, a
  • Focusing the laser light are performed so that an interaction with material takes place only in focus.
  • a precise introduction of markings perpendicular to a document surface possible. Also a contribution of
  • a height of a focused region is preferably about 50 ⁇ m.
  • the low damage is also due to the fact that in non-linear processes, which have a quadratic dependence on the intensity (I 2 dependence), an interaction outside of a focus drops very rapidly.
  • Marks may be tactile, i. be designed for a tactile perceptible detection.
  • a security element is a structural unit comprising at least one security feature.
  • a security element can be an independent structural unit, which can be connected, for example glued, to a security document, which can also be a value document. It can also be an integral part of a security document.
  • An example of the former is a so-called holopatch (a hologram patch, such as a hologram film portion) adhered to a bill, or a visa stickable to a security document.
  • An example of the latter is a diffractive surface relief embossed in an identity document.
  • a security feature is a structure which can only be produced or reproduced with increased effort (not in comparison to simple copying) or not at all unauthorized, or makes a forgery or falsification visually and / or mechanically recognizable.
  • security documents are merely exemplified called identity cards, passports, ID cards, access control cards, visas, tax stamps, tickets, driver's licenses, motor vehicle papers and documents of value, which include banknotes, checks, postage stamps and credit cards, and any smart cards and adhesive labels (eg for product security).
  • Security documents which also embody a value, are also referred to as value documents. A sharp distinction between these two terms is often not possible.
  • a credit card for example, represents a security document protected by security features and security elements against counterfeiting and adulteration, which does not directly represent a value beyond the pure material value of the card, but makes it possible to dispose of large assets.
  • a pulsed laser is a laser that, in contrast to a continuous wave or CW laser that continuously emits laser light, emits laser light in temporally limited portions called pulses.
  • a short pulse laser is understood here a laser that generates light pulses whose pulse duration is less than 100 picoseconds.
  • the literature also speaks in part of ultrashort laser pulses, with no uniform definition for this. Ultrashort pulses are pulses whose pulse duration is less than 10 picoseconds.
  • An optical fiber is a fiber of a transparent material to whose
  • Total internal reflection can be a conduit of light inside the fiber.
  • a fiber laser is a laser whose active medium in which light-induced emission of electromagnetic radiation occurs is an optical fiber.
  • a pattern typically consists of a multiplicity of juxtaposed pattern units or pixel dots.
  • the pattern units or pixels of a pattern are assigned to each other and arranged laterally in a defined manner,
  • An individualization pattern is a pattern that is used for individualization.
  • Individualizing is a pattern when it is unique to a person or a person
  • a code individualizing a group of persons within the total population of a country is the city of residence.
  • An individualizing for a person code for example, the number of the identity card or passport photo.
  • One for a group of bills within the total amount of bills individualizing code is the value.
  • Individualizing for a banknote is the serial number.
  • Non-individualizing is a pattern that is identical for all elements of an entity. For bills this is for example a coat of arms, which is printed on all banknotes.
  • a marking device for value or security documents which at least one laser light source and a
  • Light guide device which is coupled to the laser light source, so that light of the laser light source is positioned controlled on a value or security document, wherein the laser light source is a short pulse laser source, the laser pulses having a pulse duration of less than 100 picoseconds, preferably less than 10
  • a color change for example, a blackening in different shades of gray, of transparent
  • a preferred method for permanently marking a value or security document thus comprises the steps: generating laser light and guiding the laser light by means of a light-guiding device, so that from the
  • Light guide device emitting laser light on the value or
  • Security document is positioned and the value or security document is marked locally, wherein the laser light is generated in the form of laser light pulses with a pulse duration of less than 100 picoseconds, preferably less than 10 picoseconds.
  • fiber lasers have the advantage that they can be constructed very compact and have a high electro-optical efficiency. In addition, fiber lasers much more modest in terms of adjustment and handling than most known solid-state lasers.
  • An advantage of using short laser pulses with pulse durations of less than 100 picoseconds, preferably less than 10 picoseconds, is that a very precise spatial confinement of the interaction zone between the laser light and the material of the asset or security document is achievable when non-linear optical interaction effects can be used to form the label.
  • a preferred embodiment of the method therefore provides that the marking via a non-linear optical effect in the value or
  • the light-guiding device comprises a relative to the value and / or security document movably mounted optical fiber, which is coupled to at least one drive means so that the light via a movement of an exit surface of the optical fiber in a positioning plane relative to the value - And / or security document can be positioned laterally on the value or security document.
  • the light of the laser light source is thus guided by means of an optical fiber and a positioning of the light on the value to be marked or
  • Security document is accomplished by moving the exit surface of the optical fiber relative to the asset or security document.
  • the light used for the marking with a suitable orientation of the positioning plane relative to a surface of the security document, preferably parallel thereto, in each case at the same angle, preferably perpendicular, to the value and / or security document incident and beyond a path length of the traveled light path is the same regardless of the illuminated lateral position on the security and / or security document.
  • This makes it possible to focus the light used more strongly and yet to use an identical focus extension at the marking at all lateral positions of the value or security document. Problems that are known due to a slightly different direction of irradiation in the guide devices of the prior art, can thus be avoided.
  • Security document is mounted movably relative to the optical fiber. Construction and
  • Light guide device comprises a relative to the value and / or security document movably mounted optical fiber as well as the value and / or
  • Security document is movable relative to the optical fiber. It is particularly preferred that the security and / or security document is movable along a transport direction and that the optical fiber is movable in a direction orthogonal to the transport direction, parallel to the surface of the security and / or security document to be personalized.
  • a focusing optics can be used. It is preferred, a focusing optics, if used, to couple with the respective exit surface of the optical fiber. This means that the focusing optics by means of
  • the advantage is that the light path through the focusing optics is the same in each case, regardless of the position on or in the value or security document that is being marked.
  • the position of the focus in the document is varied. This means that the focus position along a normal to a plane surface of the document or a plan idealized surface of the value or security document, if this has a surface relief or other irregularities, at the same lateral position or at different lateral positions on the value or security document is varied.
  • markings are made in different levels of the value or security document. These can be arranged one above the other or laterally offset, in each case arranged relative to the surface of the preferably card-shaped value or security document.
  • marks are generated in the register in different levels in the document. In one embodiment, at least a portion of the Markings perpendicular to the surface of the security or value document considered stacked.
  • Markers that are marked in different planes parallel to the surface of the value or security document in the value or security document can be used, for example, to display different information for different viewing directions by the markings of the different levels completely or partially in the different viewing directions cover.
  • different layers from which the value or security document is optionally joined together can be connected to one another
  • the focusing is done by means of the Kerr effect.
  • the focal length of the material of the focusing lens changes due to the non-linear interaction of the electromagnetic radiation with the material of the lens.
  • the focal length of the lens is inversely proportional to the intensity of the lens
  • the light guide is performed by means of an optical fiber
  • a movement of the exit surface of the optical fiber is possible to vary a light path between the exit surface and a surface of the document. This can be used to vary a focus position within the value or security document.
  • Such a change in direction can be achieved, for example, in one embodiment by the fact that the exit surface from which the light is rectilinear to the
  • Document surface is moved in addition to the movement in the positioning plane, which is selected parallel to the surface of the security or value document, perpendicular to the positioning plane or the surface of the security document or security document.
  • the exit surface is moved together with imaging and / or focusing optics in the positioning plane to position the exiting light laterally on the surface of the asset or security document, a change in the light path may occur, for example
  • Optical fiber additionally relative to elements of the imaging and / or
  • Focusing optics such as a deflection mirror, in the positioning plane is relatively movable.
  • the focusing optics consists of a
  • the piezoelectric material By applying tension, the material can be deformed and thus the focal length of the material can be adjusted.
  • the laser light source is integrated in the optical fiber.
  • any coupling losses are reduced in the coupling into the fiber.
  • a compact and simple construction is possible.
  • Solid-state lasers for example Ti: sapphire lasers
  • fiber laser systems require no expensive cooling and achieve a high electro-optical efficiency.
  • laser light of different wavelengths can be generated by parametric tuning with the same hardware. This is effective with fiber lasers.
  • the light guide device comprises at least one further movable, preferably even more movable movably mounted optical fibers. This makes it possible, at the same time at several points or at the same time with different wavelengths of light to attach a mark on the security or security document or in the value or
  • each optical fiber can have one to the corresponding wavelength of light be fitted adjusted focusing optics.
  • pulse durations of more than 10 ps it is still possible to speak of a defined wavelength.
  • the spread due to the Heisenberg uncertainty principle is significant.
  • the blur at a pulse of 10 ps is about 0.41 meV, which corresponds to about 0.12 nm at a wavelength of 620 nm (2 eV).
  • the blur is about 0.41 eV, which means at a wavelength of 620 nm (2 eV) that the bandwidth is at least 125 nm.
  • the exit surface of the at least one optical fiber is positionable relative to the at least one further optical fiber or optionally relative to the plurality of exit surfaces of the plurality of optical fibers in the positioning plane.
  • the plurality are the plurality
  • optical fibers or their exit surfaces in the positioning plane individually driven and positioned relative to each other. It goes without saying for the person skilled in the art that there are mechanical residual actions since the optical fibers can not penetrate one another and thus can not be arranged at one and the same position at the same time.
  • the number of optical fibers is chosen so that upon a relative movement of the entirety of the optical fibers along a
  • Spacing the entire value or security document or at least a strip of the value or security document can be marked with a two-dimensional / three-dimensional pattern.
  • the optical fibers can be arranged rigidly relative to one another along a line or any other arrangement.
  • an optical modifying element is coupled or integrated with the at least one optical fiber, via which the decoupled light can be modified in terms of its frequency and / or intensity. This is particularly advantageous when the light guide device comprises a plurality of further optical fibers. These then preferably also each have an optical modifying element associated with the fiber.
  • the light energy generated by a laser light source is generally sufficient to mark the document at several points at the same time, in one embodiment it is provided that the light from the one laser light source is directed into the at least one laser light source Optical fiber and the at least one further or optionally a plurality of further optical fibers is coupled. Even with such an embodiment, it is advantageous if the individual optical fibers are each assigned an optical change element. It is understood that embodiments are also advantageous, which comprise a plurality of laser light sources whose light is coupled in each case in one or more of the several further optical waveguides.
  • the focus position within the value or security document along a normal to the surface of the value or security document can be set individually for the latter in one embodiment. This can be targeted markings in different levels or layers, from which the value or security document is joined, are introduced. Preferably, this is controlled possible.
  • Fig. 1 is a schematic representation of a marking device for value or
  • FIG. 2 shows a further embodiment of a marking device
  • FIG. 3 shows yet another embodiment of a marking device
  • Fig. 4 is a schematic representation of an arrangement of exit surfaces of
  • 5a, 5b an imaging and focusing optics for varying in focus length
  • Fig. 6 is a schematic representation of a beam profile in focus
  • Fig. 7 is a schematic representation of a value or security document, are introduced in the markers in different levels.
  • FIG. 1 schematically shows a marking device 1 for the permanent marking of a value or security document 2.
  • the value document 2 is on a
  • Bracket 3 is arranged. This can be supplied to the value or security document 2 by means of a transport device 4 and / or removed from it. In some embodiments, it is possible that the transport device 4 forms the holder 3.
  • the person skilled in various devices for transporting value or security documents are known. In general, the marking of the value or security document 2 is carried out after this is completed except for the mark still to be attached. However, it is also possible to make the marking before the value or security document 2 is completely finished, for example, before it is separated from a sheet or a strip.
  • the marking device 1 comprises a laser light source 5.
  • the laser light source 5 is designed to generate laser light 6.
  • the laser light source 5 is a pulsed light source.
  • it may be a solid state laser, e.g. a Ti: sapphire laser, act.
  • the laser light 6 In order to mark the value or security document 2, the laser light 6 must be aimed at the value or security document 2, i. on the surface 7 or inside the value or security document 2, are positioned.
  • a light guide device 8 is provided.
  • the light-guiding device 8 comprises an optical fiber 9, into which the laser light 6 is coupled. An exit surface 10 of the optical fiber 9 is moved in a positioning plane 1 1.
  • the positioning plane 1 1 is formed parallel to the surface 7 of the value or security document 2 in a preferred embodiment.
  • the optical fiber 9 is coupled to a drive device 12.
  • the drive device 12 comprises in the illustrated embodiment an X-axis actuator 13, a Y-axis actuator 14 and a Z-axis actuator 15. These are connected and aligned so that the X-axis actuator movement of the exit surface 10 of the optical fiber 9 parallel to a X-axis 16, the Y-axis actuator 14 parallel to a Y-axis 17 and the Z-axis actuator 15 parallel to a Z-axis 18 causes. It should be noted that a movement parallel to the Z-axis causes a change in the positioning plane 1 1.
  • the exit surface 10 in the positioning plane 1 1 effects a lateral alignment and positioning of the laser light 6 'emerging from the exit surface 10 or the focal point 19 formed thereof. It should be noted that other embodiments may have and use differently configured light guiding devices
  • an imaging and / or focusing optics 20 is coupled to the exit surface 10 of the optical fiber 9. This is moved with the exit surface 10 of the optical fiber.
  • the exit surface 10 of the optical fiber is configured so that the exiting laser light 6 'is focused and no or supplemental focusing optics are necessary.
  • Amount of energy which can be varied, for example, via a pulse intensity or a number of light pulses introduced at the same position, the type of marking, for example a blackening with respect to a gray level, is regulated. Via the drive device 12 it is possible to make a marking vectorially (but broken down into individual pixels (marking points)) or in a grid.
  • a distance 27 of the positioning plane 1 1 from the surface 7 or the value or security document 2 need not be varied in many applications in the marking.
  • a positioning device 8 comprising only an X-axis actuator 13 and a Y-axis actuator 14 is sufficient. It is understood by those skilled in the art that for the positioning of the exit surface 10 of the optical fiber 9 in the positioning plane 1 1, a set of actuators can be used, which cause no movements parallel to the coordinate axes, but in interaction are able to
  • Exit surface 10 in the positioning plane 1 1 lateral position at different locations to position.
  • Positioning level 1 1 must not be able to be positioned in all embodiments so that all points on the surface of the document with the exiting laser light 6 'can be illuminated.
  • the laser light only needs to be positionable at those positions on the asset or security document at which markings are to be made. Is only a limited range of value or Security document provided for a mark, as well as an adapted to this area positioning range 26, in which the exit surface 10 of the optical fiber 9 is positioned.
  • the modification element 21 can be designed, for example, as an electro-optical or acousto-optical modulator or switch. Thus, independently of the pulse energy provided by the laser, the locally supplied
  • Amount of energy and on this example, a blackening in grayscale be controlled.
  • the individual components of the marking device are controlled by a controller 22, so that the marking is carried out automatically.
  • the controller 22 is only supplied with data containing the pattern for the mark, so that the corresponding areas of the value or security document 2 are irradiated with a corresponding laser light intensity to effect the corresponding marking in the value or security document 2.
  • the embodiment according to FIG. 1 is characterized in that the laser light 6 is generated as pulsed laser light with short pulse durations of less than 100 ps, preferably less than 10 ps. This is an exploitation of non-linear optical effects for introducing the markings on or in the value or
  • Light guide device 8 and the value or security document 2 are kept low. This can be selected in the range from contact to a few cm, preferably 0.2 to 10 mm. This makes it possible to form the beam guide strongly divergent and to focus sharply. Both across the beam direction
  • Propagation direction of the laser light 6 'improved resolution can be achieved when marking.
  • micro-writing can be realized with a character size in the range of a few micrometers.
  • a so-called beam profile 61 in focus is shown schematically.
  • a light intensity I is plotted against the position r transversely to the propagation direction (z-direction in FIG. 1), (r is chosen, for example, parallel to the x-axis according to FIG. 1).
  • r is chosen, for example, parallel to the x-axis according to FIG. 1.
  • a beam profile 61 of the laser light 6 1 (according to FIG. 1) in the focus 19 (according to FIG. 1) has a Gaussian profile. Since nonlinear interactions are dependent on the square I 2 62 of the intensity I of the laser light, that is to say a so-called I 2 dependency, the non-linear one is found at a suitably chosen pulse intensity
  • the focal extent of the marking is determined by an extension 65 of the core region 63 and not by the extent 66 of the focus 19 of the laser light 6 ', which corresponds to the extent of the beam profile 61.
  • Security documents which have an extent of 500 ⁇ m to 1000 ⁇ m perpendicular to the surface 7 make it possible to mark a plurality of mutually separate markings 71 ', 71 "in register along a surface normal 72 to the surface 7.
  • FIG. 2 a further embodiment of a marking device 1 is shown schematically.
  • the illustrated embodiment differs from that of FIG. 1 in that the light guide device 8 in this embodiment two
  • Optical fibers 9, 9 ' comprises. These are respectively coupled to a drive device 8 or 8 ', which are formed analogously to the drive device 8 according to FIG.
  • This embodiment offers the advantage that the value or security document 2 can be marked simultaneously or quasi simultaneously at several locations.
  • the laser light source 5 is shown schematically in this embodiment as a fiber laser 23 with a seed laser 24 and an amplifier ring 25. It will be understood by those skilled in the art that another source of laser light may be used with it
  • Embodiment can be used. Likewise, a fiber laser 23 as
  • Laser light source 5 are used in the embodiment of FIG. 1.
  • the emerging from the laser light source 5 light 6 is either a beam splitter (not shown) divided and coupled into the optical fiber 9, 9 'simultaneously or via an electro-optical or electro-acoustic switch alternately in the
  • Optical fibers 9, 9 'coupled Since the mechanical movement speed of the exit surfaces 10, 10 'via the drive means 8, 8' are usually limited, can at a suitable selected repetition rate of the laser light 6, 6 'even at maximum movement speed of the exit surfaces 10, 10' is a mark of the value or Security document 2 take place, even if every second laser pulse in the other optical fiber 9, 9 'is coupled. In this case, marking is still considered to be simultaneous or quasi-simultaneous.
  • Fig. 3 another embodiment of a marking device 1 is shown schematically. In this embodiment, two laser light sources 5, 5 'are provided. This makes it possible in a simple manner, in different places with
  • each of the optical fiber 9 is preferably one
  • Variation element (not shown) is coupled so that the respective coupled laser light intensity and / or laser frequency can be controlled via each optical fiber 9.
  • a fiber laser system can be used to achieve higher electro-optical efficiencies.
  • the required energy can be significantly reduced.
  • the entire structure can be made much more compact, so that fitting into a production line or plant is much easier.
  • laser marking systems can also be deployed remotely.
  • FIG. 5a and 5b Shown in Figures 5a and 5b is an embodiment in which focus positioning, i. a positioning of the focal point parallel to the Z-axis, analogous to the geometry of FIG. 1 is described.
  • the embodiment includes an imaging and
  • Focusing Optics 20 This includes a focusing lens 31 and a deflecting mirror 32.
  • a focusing actuator 33 is provided.
  • a relative movement between the deflecting mirror 32 and the exit surface 10 of the optical fiber 9 can be effected. This changes the focus position along the Z-axis.
  • the imaging and focusing device 20 is moved together with the exit surface 10 of the optical fiber in the positioning plane 1 1, which coincides with the XY plane, to laterally position the laser light 6 'on the value or security document.
  • a movement of the light exit surface 10 in the positioning plane 1 1 is also effected via the sieraktor 33, which, however, only the distance changed to the deflecting mirror 32 and this the focus position perpendicular to the positioning plane.

Abstract

L'invention concerne un dispositif de marquage (1) d'un document de valeur ou de sécurité (2), ainsi qu'un procédé permettant le marquage durable, en particulier individuel, de documents de valeur ou de sécurité (2). Ledit procédé permettant le marquage durable d'un document de valeur ou de sécurité (2) comprend : la production d'une lumière laser (6) et le guidage de la lumière laser (6) au moyen d'un dispositif de guidage de lumière (8), de sorte que la lumière laser (6') sortant du dispositif de guidage de lumière (8) soit positionnée sur le document de valeur ou de sécurité (2) et que le document de valeur ou de sécurité (2) soit marqué localement, la lumière laser (6) étant produite sous la forme d'impulsions lumineuses laser d'une durée d'impulsion inférieure à 100 ps. Il est ainsi possible d'exploiter les interactions non linéaires entre le matériau du document de valeur ou de sécurité (2) et la lumière laser (6') servant au marquage. De plus, un guidage approprié de la lumière laser (6') permet d'obtenir une focalisation améliorée et en outre une résolution améliorée du motif produit par le marquage.
PCT/EP2011/052800 2010-02-26 2011-02-25 Dispositif de marquage et procédé de marquage haute résolution de documents de valeur ou de sécurité WO2011104330A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180011261.8A CN102858552B (zh) 2010-02-26 2011-02-25 用于以高分辨率对有价-或安全文件进行标记的标记装置和方法
EP11707385.8A EP2539155B9 (fr) 2010-02-26 2011-02-25 Dispositif de marquage et procédé de marquage haute résolution de documents de valeur ou de sécurité

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010070A DE102010010070A1 (de) 2010-02-26 2010-02-26 Markierungsvorrichtung und Verfahren zum Markieren von Wert- oder Sicherheitsdokumenten mit hoher Auflösung
DE102010010070.6 2010-02-26

Publications (1)

Publication Number Publication Date
WO2011104330A1 true WO2011104330A1 (fr) 2011-09-01

Family

ID=44121664

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/052800 WO2011104330A1 (fr) 2010-02-26 2011-02-25 Dispositif de marquage et procédé de marquage haute résolution de documents de valeur ou de sécurité

Country Status (4)

Country Link
EP (1) EP2539155B9 (fr)
CN (1) CN102858552B (fr)
DE (1) DE102010010070A1 (fr)
WO (1) WO2011104330A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013207379A1 (de) * 2013-04-23 2014-10-23 Bundesdruckerei Gmbh Verfahren und Vorrichtung zur Lasermarkierung mit Graustufenkalibrierung

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048733A1 (de) 1980-12-23 1982-07-08 GAO Gesellschaft für Automation und Organisation mbH, 8000 München "ausweiskarte und verfahren zur herstellung derselben"
DE69605788T2 (de) 1995-05-10 2000-08-03 Dsm Nv Aufzeichnungsverfahren einer gefärbten beschriftung
DE10011486A1 (de) 1999-08-30 2001-03-01 Orga Kartensysteme Gmbh Kartenförmiger Datenträger und Verfahren zu seiner Herstellung
WO2001028778A2 (fr) 1999-10-19 2001-04-26 Orga Kartensysteme Gmbh Procede pour appliquer des marques de couleur sur un support de donnees, de preference en matiere plastique, et support de donnees produit selon ledit procede
DE19955383A1 (de) 1999-10-29 2001-05-03 Orga Kartensysteme Gmbh Verfahren zum Aufbringen von farbigen Informationen auf einen Gegenstand
DE10053264A1 (de) 2000-10-26 2002-05-08 Orga Kartensysteme Gmbh Verfahren zum Einschreiben von Daten auf/in Datenträger mittels Laserstrahlung und damit hergestellte Datenträger
US20050001419A1 (en) * 2003-03-21 2005-01-06 Levy Kenneth L. Color laser engraving and digital watermarking
DE102005001443A1 (de) 2005-01-10 2006-07-20 Jenlab Gmbh Sicherheitsmarkierung in einem transparenten Polymer
WO2006114600A2 (fr) * 2005-04-25 2006-11-02 Datalase Ltd. Impression polychrome
DE102006014367A1 (de) 2006-03-27 2007-10-04 Giesecke & Devrient Gmbh Datenträger und Verfahren zu seiner Herstellung
JP2007261114A (ja) * 2006-03-29 2007-10-11 Toppan Printing Co Ltd 積層構造シートおよび積層構造シートへの情報追記方法
US20100040836A1 (en) * 2008-08-12 2010-02-18 Shenping Li Method for providing sub-surface marks in polymeric materials

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1113856A (zh) * 1994-05-12 1995-12-27 厄斯特赖希国家银行 加有光学安全标记的证券、用于制造这种证券的连接层以及识别证券真伪的检验装置
US6275250B1 (en) * 1998-05-26 2001-08-14 Sdl, Inc. Fiber gain medium marking system pumped or seeded by a modulated laser diode source and method of energy control
ITMI20011889A1 (it) * 2001-09-10 2003-03-10 Elmiva S A S Di Walter Mantega Procedimento contro la falsificazione e la contraffazione di documenti di valore in particolare banconote
JP5417701B2 (ja) * 2007-11-01 2014-02-19 ソニー株式会社 光情報記録媒体及びその製造方法
DE102008030868A1 (de) * 2008-06-30 2009-12-31 Krones Ag Vorrichtung zum Beschriften von Behältnissen
EP2277699A2 (fr) * 2009-07-13 2011-01-26 Kesper Druckwalzen GmbH Tamis d'impression et procédé destinés à la fabrication de tamis d'impression

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048733A1 (de) 1980-12-23 1982-07-08 GAO Gesellschaft für Automation und Organisation mbH, 8000 München "ausweiskarte und verfahren zur herstellung derselben"
DE69605788T2 (de) 1995-05-10 2000-08-03 Dsm Nv Aufzeichnungsverfahren einer gefärbten beschriftung
DE10011486A1 (de) 1999-08-30 2001-03-01 Orga Kartensysteme Gmbh Kartenförmiger Datenträger und Verfahren zu seiner Herstellung
WO2001028778A2 (fr) 1999-10-19 2001-04-26 Orga Kartensysteme Gmbh Procede pour appliquer des marques de couleur sur un support de donnees, de preference en matiere plastique, et support de donnees produit selon ledit procede
DE19955383A1 (de) 1999-10-29 2001-05-03 Orga Kartensysteme Gmbh Verfahren zum Aufbringen von farbigen Informationen auf einen Gegenstand
DE10053264A1 (de) 2000-10-26 2002-05-08 Orga Kartensysteme Gmbh Verfahren zum Einschreiben von Daten auf/in Datenträger mittels Laserstrahlung und damit hergestellte Datenträger
US20050001419A1 (en) * 2003-03-21 2005-01-06 Levy Kenneth L. Color laser engraving and digital watermarking
DE102005001443A1 (de) 2005-01-10 2006-07-20 Jenlab Gmbh Sicherheitsmarkierung in einem transparenten Polymer
WO2006114600A2 (fr) * 2005-04-25 2006-11-02 Datalase Ltd. Impression polychrome
DE102006014367A1 (de) 2006-03-27 2007-10-04 Giesecke & Devrient Gmbh Datenträger und Verfahren zu seiner Herstellung
JP2007261114A (ja) * 2006-03-29 2007-10-11 Toppan Printing Co Ltd 積層構造シートおよび積層構造シートへの情報追記方法
US20100040836A1 (en) * 2008-08-12 2010-02-18 Shenping Li Method for providing sub-surface marks in polymeric materials

Also Published As

Publication number Publication date
CN102858552B (zh) 2016-01-20
DE102010010070A1 (de) 2011-09-01
EP2539155B1 (fr) 2014-10-29
EP2539155B9 (fr) 2015-01-21
CN102858552A (zh) 2013-01-02
EP2539155A1 (fr) 2013-01-02

Similar Documents

Publication Publication Date Title
EP2539154B1 (fr) Procédé de marquage coloré de documents de valeur et de sécurité
EP1776674B1 (fr) Support de donnees a element de securite, et son procede de production
DE102004022079A1 (de) Wertdokument mit Seriennummer
DE10358784A1 (de) Datenträger mit mittels Laserstrahl eingeschriebenen Kennzeichnungen und Verfahren zu seiner Herstellung
EP2941355B1 (fr) Procédé de réalisation d'un élément de sécurité comprenant une couche d'enregistrement sensible au rayonnement laser
DE102008028705B4 (de) Verfahren zum Herstellen eines Wert- und/oder Sicherheitsdokuments sowie Wert- und/oder Sicherheitsdokument mit einer demetallisierten Struktur
EP2104618A1 (fr) Élément de sécurité avec un élément optiquement variable
WO2001029764A1 (fr) Support de donnees a caracteristiques d'authenticite et son procede de production
EP3015279A1 (fr) Procédé de fabrication d'un élément de sécurité comprenant une image lenticulaire
EP2539155B9 (fr) Dispositif de marquage et procédé de marquage haute résolution de documents de valeur ou de sécurité
EP2539152B1 (fr) Dispositif de marquage et procédé de marquage de documents de valeur ou de sécurité, à l'aide de fibres optiques
EP3554846B1 (fr) Procédé permettant de fabriquer un élément de sécurité doté d'une image lenticulaire
EP2183116B1 (fr) Individualisation colorée de documents de sécurité
EP3900944A1 (fr) Procédé de marquage au moyen des impulsions laser
DE102020208256B4 (de) Sicherheitselement mit mikrostrukturiertem Sicherheitsmerkmal und Verfahren zur Herstellung
EP2644406A2 (fr) Procédé de fabrication d'un support de données et support de données ainsi obtenu
DE102019113005A1 (de) Lumineszierendes Sicherheitselement
EP3291994B1 (fr) Dispositif de personnalisation et procédé de personnalisation d'un document
DE102005001443A1 (de) Sicherheitsmarkierung in einem transparenten Polymer
EP4368409A1 (fr) Élément de sécurité, document de sécurité et procédé de fabrication d'un document de sécurité
EP3782822A1 (fr) Élément de fixation microstructuré transparent

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201180011261.8

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11707385

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011707385

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE