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
  • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
• • 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
  • B42D25/30—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
  • G03H1/0005—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
  • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
  • G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
  • G03H2001/266—Wavelength multiplexing

Definitions

• the invention relates to a security and / or valuable document having a substrate and having at least one security element arranged on the substrate, wherein the security element has a pattern consisting of at least two partial patterns and applied to the substrate, wherein the partial patterns adjoin one another in register on the substrate laterally , and wherein at least one partial pattern is holographically active.
• the invention further relates to a process for its preparation and to a process for its verification.
• volume holograms are known.
• a layer of an HRM holographic recording material
• Volume holograms achieve a comparatively higher diffraction efficiency and can also be designed as reflection holograms, in which the Bragg levels are substantially parallel to the surface. Therefore, a metallized film is not necessary.
• HRM for example, the customary photopolymers in question. But other materials are suitable. Suitable materials for the HRMs literature are removable and HRMs all 's described therein are used in the context of the present invention.
• the pattern may be formed with lines having a line width in the range of 1 to 500 ⁇ m, in particular 50 to 300 ⁇ m, preferably a guilloche pattern, and the line density being between 1 and 1000 lines per cm 2 , for example 2 to 300 lines per cm 2 , in particular between 10 to 100 lines per cm 2 .
• a guilloche pattern is a protective line entwined according to defined geometric rules.
• the lines can, for example, be wavy, curved or circular.
• the term line density refers to the number of different lines that can be counted within a unit area.
• lines of a guilloche pattern run parallel to one another, ie at an angle to one another, which is smaller than 10 °, in particular smaller than 5 °.
• the second sub-pattern may, but need not, itself consist of at least two sub-patterns, the sub-patterns being exposed under different holographic conditions.
• different holographic conditions include different wavelengths of exposure and / or different formation of the holography master in the areas associated with the subpatterns.
• the second subpattern may be holographically exposed with an image.
• images are for example passport photo, signs, coats of arms, strings of letters and / or numbers, barcodes, etc.
• the pattern is under- or overprinted with an optically active color.
• This can be provided for both partial patterns, or only for one partial pattern, while another partial pattern is not under- or overprinted.
• This may be, for example, transparent functional colors in the visible wavelength range, which perform a function only under a defined wavelength, under pressure or under elevated temperature, be it absorption or emission. Examples of these are luminescent colors, such as UV-fluorescent or phosphorescent colors. But also anti-Stokes colors or colors which show photochromism or thermochromism can be used. With such colors, for example, before printing the pattern fluorescent structures are printed, which are then arranged under the pattern. As a result, fluorescent patterns are generated under, for example, UV irradiation.
• Such security and / or value documents typically have a substrate, a printing layer and optionally a transparent cover layer.
• a substrate is a support structure to which the print layer is applied with information, images, patterns, and the like. Suitable materials for a substrate are all commercially available transparent materials plastic base in question.
• Below the substrate may, but not necessarily an optionally non-transparent core layer may be arranged, wherein on the opposite side of the core layer further layers, for example, mirror-symmetrical to the median plane of the core layer may be arranged.
• the invention further relates to a method for producing a security and / or value document according to the invention, comprising the following method steps: a) the first part pattern and the second part pattern are printed on a substrate simultaneously or successively in a single printing process, b) at least the second one Partial pattern is exposed holographically, c) the HRM of the first partial pattern and / or the second partial pattern is optionally fixed, and d) the substrate with the two partial patterns is integrated into a composite of a plurality of layers, in particular laminated or laminated or glued. Before or after the holographic exposure, a thermal treatment can be carried out.
• a thermal treatment before exposure for example for the purpose of drying, below, in particular at least 10 0 C below, better at least 40 0 C below the fixing temperature.
• the thermal treatment for example for the purpose of fixing, may also be above the fixing temperature.
• the substrate may be provided with a release film preferably attached to the print side before being integrated into the composite. Then the substrate can interim storage or intermediate processing, for example, roll up, and before sticking the release film is then removed.
• an adhesive layer is usually set up between the release film and the substrate.
• Holography master to be reconstructed holographic pattern. It penetrates the substrate, even in areas with printed HRM, and is diffracted by the master, reconstructing the hologram by interfering with the incident light and imaging and storing the hologram in the HRM printed areas by photochemical or photophysical means Processes in HRM.
• the holography master can be designed so that it is sensitive to several wavelengths and this bends accordingly.
• FIG. 1 shows a first embodiment in plan view (a) and in cross section (b),
• FIG. 2 shows a second embodiment in plan view (a) and in cross section (b),
• FIG. 1 shows a security and / or value document with a transparent substrate 1 and with one arranged on the substrate 1
• Partial pattern 4 closely follow at dashed lines of the partial pattern 5, which continue the lines of the partial pattern 4.
• the first partial pattern 4 can also be formed in turn from a holographically exposed HRM, wherein the HRMe of the two partial patterns 4, 99
• FIG. 2 shows a variant in which differently colored sub-patterns 5a, 5b, 5c are formed by scanning exposure of the (uniform and sensitive to different exposure wavelengths) HRMs of the second sub-pattern 5 with a light beam switchable in the exposure wavelength.
• an illustration 9, here a graphic representation, is formed in the second partial pattern. This is done by storing a template of the image in the holography master used for holographic exposure. There is no reconstruction in the line-free areas, so that the printed lines of the HRM are not exposed there as well.
• FIG. 4 shows a similar variant as in FIG.
• Figure 9 is a string on the one hand.
• the production is different; the holography master does not contain a graphic template, but is merely a holographic mirror, for example a holographic focusing screen, but Figure 9 was generated by using a SLM in the usual way. Only the left edge of the second partial pattern 5 as well as the displayed character sequence were holographically exposed, so that in the unexposed areas, when viewed, no holographic reconstruction can take place.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Engineering & Computer Science (AREA)
• Computer Security & Cryptography (AREA)
• Holo Graphy (AREA)
• Credit Cards Or The Like (AREA)
• Printing Methods (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

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Cited By (1)

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Citations (6)

Family Cites Families (10)

• 2007
  • 2007-10-05 DE DE102007048086A patent/DE102007048086A1/de not_active Withdrawn
• 2008
  • 2008-10-06 WO PCT/DE2008/001599 patent/WO2009043335A1/de not_active Ceased
  • 2008-10-06 EP EP08836339.5A patent/EP2195175B1/de not_active Not-in-force
  • 2008-10-06 JP JP2010527319A patent/JP5429820B2/ja not_active Expired - Fee Related

Patent Citations (6)

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