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WO2016208590A1 - Milieu de formation d'image d'hologramme et support d'affichage d'image l'utilisant - Google Patents

Milieu de formation d'image d'hologramme et support d'affichage d'image l'utilisant Download PDF

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Publication number
WO2016208590A1
WO2016208590A1 PCT/JP2016/068422 JP2016068422W WO2016208590A1 WO 2016208590 A1 WO2016208590 A1 WO 2016208590A1 JP 2016068422 W JP2016068422 W JP 2016068422W WO 2016208590 A1 WO2016208590 A1 WO 2016208590A1
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WO
WIPO (PCT)
Prior art keywords
layer
image
hologram image
fine particles
wavelength
Prior art date
Application number
PCT/JP2016/068422
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English (en)
Japanese (ja)
Inventor
朋芳 貝塚
Original Assignee
凸版印刷株式会社
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Publication date
Application filed by 凸版印刷株式会社 filed Critical 凸版印刷株式会社
Priority to JP2017524926A priority Critical patent/JP6724915B2/ja
Publication of WO2016208590A1 publication Critical patent/WO2016208590A1/fr

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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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/309—Photographs
    • 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
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • 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

Definitions

  • the present invention relates to a hologram image forming medium and an image display medium using the same.
  • passports and ID (Identification) cards have face images to enable visual personal authentication.
  • face images For example, in a passport, conventionally, photographic paper on which a face image is printed is pasted on a booklet.
  • a passport may be tampered with by changing the photographic paper.
  • a recording method using an ink jet printer for example, see Patent Document 1
  • a laser printing recording method using a carbon dioxide gas or a YAG laser and a thermal color former for example, Patent Document 2.
  • a laser engraving printing recording method for example, Patent Document 3 in which carbon (C) existing in the substrate is used for printing recording in the depth direction of the substrate.
  • an image display body including this kind of personal authentication data an image display body provided with an image pattern formed on the basis of image data on a card substrate made of polyvinyl chloride or the like is known.
  • an image display that displays an OVD (Optical Variable Device) image in addition to the image pattern is known.
  • the OVD image is an image displayed using a hologram, a diffraction grating, an optical thin film using multilayer interference, or the like. According to the optical thin film, an effect such as color shift can be obtained by optical design.
  • Such an OVD transfer foil performs a sufficient function as an anti-counterfeiting effect, but is formed by thermally transferring an OVD transfer layer on the image after forming an image such as a face photograph like a passport. Therefore, at the present time when the forgery technology has been developed, there is a possibility that the transfer layer is temporarily removed by some method, and after the image data or the like is altered, the OVD transfer layer is placed again.
  • the OVD transfer layer is stretched over the face of the printed photo, so that the image data is falsified. There is a possibility.
  • thermal transfer, ink jet, or electrophotographic printers as means for forming image information such as facial photographs have been widely used nowadays, after the image forming portion has been removed. It is not necessarily difficult to form a new image in a region.
  • a method of giving a plurality of pieces of information for identifying an individual such as a face photograph to a personal authentication medium is considered.
  • a direct thermal transfer method using a hologram ribbon in which image information such as a face photograph is formed by a hologram or a diffraction grating, is known (for example, see Patent Document 4).
  • Patent Document 4 a direct thermal transfer method using a hologram ribbon, in which image information such as a face photograph is formed by a hologram or a diffraction grating.
  • it is conceivable to use a hologram image and a colored ink image in combination for example, see Patent Documents 5 and 6).
  • JP 2002-226740 A JP 49-131142 A JP 2006-123174 A JP 10-049647 A Japanese Patent No. 5565251 Japanese Patent No. 5569106
  • an object of the present invention is to provide a hologram image forming medium having an additional security function that can be determined by a simple technique, and an image display medium.
  • a hologram image forming medium for solving the above problems includes a base material, and a transfer layer laminated on the base material, the transfer layer having at least a release layer, an OVD layer, and an adhesive layer.
  • the OVD layer has a fine concavo-convex structure portion including a diffraction grating, and at least one of a spatial frequency and a grating angle in the diffraction grating is different between the fine concavo-convex structure portions. Good.
  • the adhesive layer may include the luminescent fine particles.
  • An image display medium for solving the above problems includes a hologram image formed using the hologram image forming medium.
  • An image display medium for solving the above problems is an image display medium including a hologram image formed using the hologram image forming medium.
  • the image display medium is an authentication image for authenticating an owner who owns the image display medium, and includes the authentication image formed by the luminescent fine particles, and has a maximum wavelength in light emission of the luminescent fine particles.
  • the diffraction grating is configured such that the wavelength of the diffracted light emitted from the diffraction grating is included in the visible region by the spatial frequency in the diffraction grating.
  • a hologram image forming medium having an additional security function that can be determined by a simple technique, and an image display medium.
  • the image display medium is formed by a process of transferring a hologram image forming medium and ink ribbons of four colors YMCK to a base material.
  • the image display medium is formed by a process of transferring a hologram image forming medium and ink ribbons of four colors YMCK to an intermediate foil and a process of transferring the intermediate foil onto a transfer target.
  • other media and processes may be used as necessary to form image information consisting of four colors of YMCK.
  • FIG. 1 is a cross-sectional view showing a configuration example of a hologram image forming medium.
  • the hologram image forming medium 200 includes an OVD layer including a fine concavo-convex structure pattern for forming a hologram image.
  • the backcoat layer 202 is positioned on one side of the substrate 201, and the release layer 203, the OVD layer 204, the reflective layer 205, and the adhesive layer are provided on the opposite side. 206 are stacked in this order.
  • the adhesive layer 206 includes luminescent fine particles 207. Since the hologram image forming medium 200 includes the back coat layer 202, it is possible to reduce problems such as sticking during printing by the thermal head.
  • the release layer 203, the OVD layer 204, the reflective layer 205, and the adhesive layer 206 constitute an example of a transfer layer.
  • the hologram image is a portion of either the intermediate foil that is the adherend surface or the transferred object that is the final form when a heat source such as a thermal head is brought into contact with the backcoat layer 202 of the hologram image forming medium 200.
  • the image is printed by thermal transfer to a hologram image forming unit described later. That is, the hologram image forming medium 200 is peelable from the base material 201 at a high temperature, and the foil sharpness for transferring only the vicinity of a portion of the hologram image forming medium 200 heated to a predetermined temperature or more.
  • adhesion to the adherend surface and heat resistance that does not impair image quality due to heating during printing are required.
  • the constituent material of each layer can be appropriately selected so as to satisfy each function.
  • the back coat layer 202 is a layer that is in close contact with a heat source such as a thermal head, and is mainly required to have heat resistance and slipperiness.
  • a material for forming the back coat layer 202 an acrylic resin, a urethane resin, an acrylic silicone copolymer, and a urethane silicone copolymer, or a known material in which silicone oil, wax, fats and oils, fine particles, and the like are added to these materials are used. A thing can be selected suitably.
  • a synthetic resin such as a polyester resin, a polyolefin resin, a polystyrene resin, a methacrylic resin, a polycarbonate resin, a vinyl chloride resin, a cycloolefin polymer, or a composite thereof is used.
  • a base material having a layer on which at least one surface of the base material 201 is subjected to a surface treatment such as an easy-adhesion layer can be used.
  • the release layer 203 is a part mainly related to peelability from the base material 201.
  • the forming material of the release layer 203 includes acrylic resin, epoxy resin, butyral resin, epoxy acrylate resin, urethane acrylate resin, and the like. Can be used alone or as a mixture. Note that the formation material of the separation layer 203 is not limited to these. Furthermore, by adding a polyester resin, wax, or the like to these resins, the composition of the material for forming the release layer 203 can be selected as appropriate so that a desired release force can be obtained. However, since the release layer 203 needs to be transparent, the light release rate of the formed release layer 203 is desirably 70% or more.
  • a known resin that is cured by active rays such as heat and ultraviolet rays, and an initiator can be appropriately selected.
  • the thermosetting resin urethane resins composed of various polyol resins and various isocyanates can be used.
  • the ultraviolet curable resin a known resin containing an acrylic polymer, an acrylic monomer, and a photoinitiator can be used.
  • the OVD layer 204 Since an arbitrary pattern for obtaining diffracted light is formed on the surface layer of the OVD layer 204, the OVD layer 204 is used in the production process of the hologram image forming medium 200 and the use environment after the transfer or after the transfer. Therefore, it is required to suppress a change in the shape of the pattern. According to the above-described forming material, it is possible to provide the OVD layer 204 with a certain level of resistance enough to suppress a change in the shape of the pattern.
  • the surface layer pattern of the OVD layer 204 includes, for example, a color screen having different patterns for emitting R, G, and B diffracted light, and positional information of the hologram image forming medium 200 during thermal transfer.
  • the sensor mark unit 204S for reading is configured.
  • Each color screen has spatial frequencies corresponding to the three primary colors R (red), G (green), and B (blue).
  • the surface layer pattern of the OVD layer 204 includes an R area 204R, a G area 204G, and a B area 204B.
  • the R area 204R includes a diffraction grating having a spatial frequency for emitting red diffracted light
  • the G area 204G includes a diffraction grating having a spatial frequency for emitting green diffracted light
  • the B area 204B includes A diffraction grating having a spatial frequency for emitting blue diffracted light is included.
  • Each of the R area 204R, the G area 204G, and the B area 204B is an example of a fine concavo-convex structure portion.
  • the spatial frequency of each diffraction grating that emits diffracted light having colors such as R, G, and B, which are surface layer patterns, is determined by the wavelength of the required color, the angle of the irradiated light, and the viewing zone. .
  • the wavelength of R light is defined as 620 nm
  • the wavelength of G light is defined as 540 nm
  • the wavelength of B light is defined as 460 nm.
  • the normal direction of the surface of the OVD layer 204 that is, the normal direction of the two-dimensional plane in which the OVD layer 204 spreads is set as the irradiation direction
  • the direction in which the angle is formed is set as the irradiation direction.
  • the surface layer pattern of the OVD layer 204 is not limited to these.
  • the diffraction grating has a configuration in which concave portions and convex portions are alternately arranged.
  • an angle formed by one reference direction and a direction in which the concave portions and the convex portions extend is a grating angle.
  • the surface layer pattern of the OVD layer 204 may include a plurality of areas including diffraction gratings having different grating angles.
  • the surface layer pattern of the OVD layer 204 may include a plurality of areas in which both the spatial frequency and the grating angle of the diffraction grating are different from each other. In these cases, each area is an example of a fine concavo-convex structure portion.
  • the hologram image forming medium 200 includes a reflective layer 205 in order to give reflectivity to the hologram image and increase the hologram effect.
  • a transparent thin film layer can be used in addition to the metal thin film layer.
  • the transparent thin film layer is preferably formed of a material having a refractive index different from that of the OVD layer 204, and a material having a high refractive index such as zinc sulfide or titanium dioxide is appropriately selected as a material for forming the transparent thin film layer. can do.
  • the adhesive layer 206 has a role of an adhesive to the adherend surface, which is a heat transfer partner, that is, a transfer destination.
  • adhesion to the release layer 203 of the hologram image forming medium 200 is required after transfer, and at the same time, the adhesion to the reflective layer 205 is also provided. There is a need.
  • acrylic resin, epoxy resin, urethane resin, polyester resin, vinyl chloride-vinyl acetate copolymer, and chlorinated PP are used as the material for forming the adhesive layer 206 in accordance with desired adhesion and thermophysical properties. It can be used as a single or plural mixture as appropriate.
  • the fine particles include, for example, organic particles composed of styrene resin, acrylic resin, silicone resin, Teflon (registered trademark) resin, urea resin, and formaldehyde condensate, glass beads, silica, alumina, Inorganic fine particles made of calcium carbonate, metal oxide, or the like, or a pigment pigment having absorption at a specific wavelength of bubbles or visible light, or luminescent fine particles 207 can be used. It is also possible to use a plurality of types of fine particles in combination.
  • the surface of the adhesive layer 206 has irregularities by adding fine particles. Although the anti-blocking performance is improved by the unevenness, there is a concern that the adhesion to the adherend surface may be lowered. Therefore, it is preferable to design the material by appropriately selecting the resin and fine particles described above according to the desired performance. .
  • examples of the material for forming the luminescent fine particles 207 include known materials such as inorganic fluorescent pigments, organic fluorescent pigments, up-conversion fluorescent pigments, and phosphorescent pigments.
  • the luminescent fine particles 207 have an excitation spectrum peak in the wavelength region from the wavelength of infrared light to the wavelength of ultraviolet light, and emit light having a maximum wavelength in light emission in a wavelength region different from the peak wavelength of the excitation spectrum.
  • the light emitting fine particles may be used, and the material for forming the light emitting fine particles 207 is not limited to the materials described above. That is, the maximum wavelength in light emission of the luminescent fine particles 207 may be different from the peak wavelength of the excitation spectrum.
  • the luminescent fine particles 207 By using the luminescent fine particles 207, it is invisible under normal use, that is, invisible in the state where no excitation light is irradiated, and forms a luminescent image that can be confirmed when irradiated with the excitation light.
  • the second authenticity determination image can be applied to the hologram image forming medium 200 without impairing the visual effect of the hologram image. Therefore, it is desirable that the wavelength region including the peak wavelength in the excitation spectrum of the luminescent fine particles 207 is other than the visible region. Furthermore, considering the light resistance load on the final image display medium, the peak wavelength in the excitation spectrum of the luminescent fine particles 207 is preferably included in the infrared wavelength region or the near ultraviolet wavelength region.
  • the hologram image forming medium 200 forms an image with the luminescent fine particles 207 similar to the hologram image transferred to the transferred material on the transferred material. be able to. Thereby, in addition to the authenticity determination under normal illumination by the hologram image, the image by the luminescent fine particles 207 can be observed by illuminating the transferred material with ultraviolet light or infrared light. With the image by 207, double authentication can be made.
  • the luminescent fine particles 207 may partially have a high concentration portion and a low concentration portion. Due to the level of the concentration, a forgery prevention pattern such as a colored pattern made of a fine geometric pattern can be further imparted to the transfer target. Thereby, the forgery prevention property of the image by the luminescent fine particles 207 can be further improved.
  • the luminescent fine particles 207 having the maximum light emission wavelength in the infrared wavelength region are used as the luminescent fine particles 207, it is possible to easily detect an image for authenticity determination emitted by a light receiving element such as a CCD.
  • a light receiving element such as a CCD.
  • visual judgment is extremely difficult. For this reason, it is more difficult for a person who intends to attempt forgery to recognize the existence of the image for authenticity determination, and the forgery resistance of the transferred object having the image for authenticity determination can be improved.
  • the luminescent fine particles having a maximum wavelength in light emission in the visible light wavelength region are used as the luminescent fine particles 207
  • an image of the luminescent fine particles 207 is obtained by illuminating with ultraviolet light or infrared light. Since it can be observed visually, the image for authenticity determination can be detected by a simple method.
  • the luminescent fine particles 207 having the maximum wavelength for light emission in the infrared wavelength region and the luminescent fine particles 207 having the maximum wavelength for light emission in the wavelength region of visible light can be used alone, respectively, It is also possible to use both the luminescent fine particles 207 in the wavelength region and the luminescent fine particles 207 having the maximum wavelength in light emission in the visible light wavelength region. As described above, when two or more kinds of luminescent fine particles 207 having different maximum wavelengths in light emission are used, since it is possible to determine the authenticity at different wavelengths, the effect of preventing forgery by the image for determining the authenticity can be further enhanced. it can.
  • a light source such as an LED, a laser, and various lamps as irradiation light having an excitation spectrum
  • a light receiving element provided with a switchable optical filter or the like as a detection device to detect
  • authenticity determination can be performed. That is, by using a detection device including a light receiving element having an optical filter capable of switching the wavelength of received light between the infrared wavelength region and the visible wavelength region, authentication in the infrared wavelength region can be performed.
  • the authenticity determination in the visible light wavelength region can be performed by the detection device.
  • the optical filter transmits light having a wavelength emitted by the luminescent fine particles 207, and blocks disturbance light and, if necessary, excitation light.
  • a filter such as a long-pass filter that transmits light having a wavelength longer than an arbitrary wavelength and blocks light having a wavelength shorter than the arbitrary wavelength, and a band-pass filter can be used.
  • the percentage of the weight addition amount of the luminescent fine particles 207 with respect to the total weight of the adhesive layer 206 is Wb
  • 2% ⁇ Wb ⁇ 50% is preferable
  • 5% ⁇ Wb ⁇ 30% is more preferable. This is because the blocking resistance starts to decrease when Wb ⁇ 5%, and the blocking resistance and foil sharpness significantly decrease when Wb ⁇ 2%.
  • Wb> 50% the adhesion to the adherend surface and the film strength are remarkably lowered, causing cohesive failure inside the adhesive layer 206 during transfer.
  • one or more kinds of fine particles other than the light-emitting fine particles 207 are appropriately selected to form the light-emitting fine particles 207. Can be used together.
  • the hologram image forming medium 200 by adding the light-emitting fine particles 207 to the adhesive layer 206, it is possible to form the adhesive layer 206 having favorable foil sharpness, blocking resistance, adhesion to the adherend surface, and the like. Moreover, according to the hologram image forming medium 200 having the adhesive layer 206 to which the luminescent fine particles 207 are added, the light emission that is invisible under normal use and can be confirmed when irradiated with arbitrary excitation light. An image can be applied to a transfer medium, and an individual authentication medium or a preference medium with a very high visual effect can be formed.
  • the luminescent fine particles 207 are added to the adhesive layer 206 has been described above as an example.
  • the luminescent fine particles 207 may be added to other layers of the hologram image forming medium 200, for example, a release layer.
  • the luminescent fine particles 207 are added to the OVD layer 204, the structure pattern forming the hologram image is damaged by the surface unevenness due to the luminescent fine particles 207. It is necessary to add.
  • thermal transfer is performed compared to a method of transferring a hologram image directly from the hologram image forming medium 200 on the transfer target.
  • a method of forming a hologram image on the transfer medium using an intermediate foil that sometimes follows the behavior of the hologram image forming medium 200 is more preferable.
  • 3 to 5 are diagrams showing a cross-sectional structure related to hologram image formation when an intermediate foil is used.
  • FIG. 3 and 4 are diagrams showing a cross-sectional structure when the hologram image forming medium 200 is thermally transferred to the adherend surface.
  • the heat source 400 is brought into contact with the back coat layer 202 of the hologram image forming medium 200 and is pressed using a roll 401, so that the vicinity where the heat source 400 is applied adheres to the image receiving layer 301 and at the same time the release layer 203 and the substrate By peeling off the peeling layer 203 at the interface with 201, a hologram image can be formed on the image receiving layer 301.
  • an intermediate foil 300 including an image receiving layer 301 and a substrate 302 is prepared.
  • the heat source 400 is brought into contact with the back coat layer 202 of the hologram image forming medium 200 to thereby form a base of the intermediate foil 300.
  • the hologram image forming medium 200 and the intermediate foil 300 are pressure-bonded by a roll 401 brought into contact with the material 302.
  • a portion of the adhesive layer 206 that overlaps the heat generation source 400 in the thickness direction of the hologram image forming medium 200 adheres to the image receiving layer 301.
  • the hologram print layer 208 including the hologram image can be formed on the image receiving layer 301 by peeling the release layer 203 at the interface between the release layer 203 and the substrate 201.
  • FIG. 5 is a diagram showing a cross-sectional structure in an example in which a hologram image is formed on the transfer object 500.
  • the intermediate foil 300 is finally heat-pressed to the transfer object 500, thereby finally An image display medium can be obtained.
  • FIG. 5A shows a configuration in which after forming a hologram image on the intermediate foil 300, the substrate 302 of the intermediate foil 300 is thermocompression bonded to the transfer object 500 to form an image display medium.
  • FIG. 5B shows a configuration in which a hologram image is formed on the intermediate foil 300, then thermally bonded to the transfer target 500, and then the substrate 302 of the intermediate foil 300 is peeled off. .
  • the intermediate foil 300 has a structure in which an image receiving layer 301 made of resin layers of at least two or more different materials is formed on a base material 302. That is, the image receiving layer 301 is formed from a mixture in which two or more kinds of resins are mixed.
  • a material for forming the image receiving layer 301 a known thermoplastic resin such as an acrylic resin, a polyester resin, and an epoxy resin can be used in appropriate combination.
  • the transferred object 500 includes a base material, and the material for forming the base material can be appropriately selected from paper, resin, synthetic paper, and the like according to the form used by the image display medium. Further, a predetermined surface treatment can be applied to the surface of the base material of the transfer object 500 before applying the hologram image in accordance with the physical properties desired to be imparted to the base material. Specifically, the surface treatment includes, for example, a treatment for forming an anchor layer for improving adhesion with a transfer image.
  • it is a layer having an antistatic function, a peelable protective layer, a layer that absorbs a wavelength in a region not including the excitation wavelength of the luminescent fine particles 207 and the maximum wavelength in light emission, and has a function of protecting a printed matter.
  • You may provide the intermediate foil 300 with the layer which has.
  • FIG. 6 is a diagram illustrating a planar structure in an example of the image display medium 602.
  • the hologram print layer including the hologram image in the hologram image printing unit 600 in the vicinity of the photographic image display unit 601 in the transferred object 500.
  • a visible image display medium 602 for authentication can be formed.
  • the photographic image is falsified by visually observing the images of the photographic image display unit 601 and the hologram image printing unit 600 installed in the vicinity thereof. It can be easily determined whether or not there is.
  • the photographic image and the hologram image are preferably the same image.
  • the light emitting fine particles 207 included in the hologram print layer 208 are irradiated with excitation light using an LED or an ultraviolet lamp having a peak wavelength of the excitation spectrum, and the hologram print layer 208 of the hologram image printing unit 600 emits light.
  • the authenticity of the image display medium 602 can be determined. That is, the image display medium 602 can exhibit a further anti-counterfeit effect by the luminescent fine particles 207 included in the adhesive layer 206.
  • the image display medium 602 is an authentication image for authenticating the owner who owns the image display medium 602, and may include an authentication image formed by the luminescent fine particles 207.
  • the authentication image formed by the luminescent particles 207 may be an image of the owner's face, an image displaying the owner's fingerprint, and an image displaying the name of the owner. That is, the authentication image may be an image including information belonging to the owner of the image display medium 602.
  • the luminescent fine particles 207 are preferably luminescent fine particles in which the maximum wavelength in light emission is included in the infrared wavelength region.
  • the hologram printing layer 208 is formed on the hologram image printing unit 600, and the hologram printing layer 208 includes the OVD layer 204.
  • the diffraction grating included in the OVD layer 204 is preferably configured so that the wavelength of the diffracted light emitted from the diffraction grating is included in the visible region depending on the spatial frequency in the diffraction grating.
  • the diffraction grating may be a diffraction grating included in the above-described R area 204R, G area 204G, and B area 204B.
  • the CCD when detecting light emitted from the image display medium 602 using a CCD that detects light included in the infrared wavelength region, the CCD detects light emitted from the luminescent fine particles 207. On the other hand, the diffracted light emitted from the diffraction grating is not detected.
  • the detection of the authentication image formed by the light emitting fine particles 207 by the CCD is prevented from being hindered by the diffracted light emitted from the diffraction grating. Therefore, according to the image display medium 602, reading of the authentication image formed on the hologram image printing unit 600 and authentication of the owner using the authentication image are hindered by the image formed by the diffracted light. While suppressing this, it is possible to display a hologram image and an image of the luminescent fine particles 207.
  • a surface treatment such as a treatment for forming an anchor layer on the outermost surface or a corona treatment may be performed.
  • DESCRIPTION OF SYMBOLS 200 ... Hologram image formation medium 201 ... Base material 202 ... Backcoat layer 203 ... Release layer 204 ... OVD layer 204R ... R area 204G ... G area 204B ... B area 204S ... Sensor mark part 205 ... Reflective layer 206 ... Adhesive layer 207 ... Luminescent fine particles 208 ... Hologram printing layer 300 ... Intermediate foil 301 ... Image receiving layer 302 ... Base material 400 ... Heat source 401 ... Roll 500 ... Transfer object 600 ... Hologram image printing part 601 ... Photo image display part 602 ... Image display medium

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Holo Graphy (AREA)
  • Optical Filters (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

L'invention concerne un milieu pour former une image d'hologramme, qui est pourvu d'un matériau de base et d'une couche de transfert qui est déposée sur le dessus du matériau de base et qui présente au moins une couche de pelage, une couche OVD et une couche adhésive. Les couches autres que la couche OVD dans la couche de transfert contiennent des microparticules luminescentes, les microparticules luminescentes ont une longueur d'onde de crête d'un spectre d'excitation à l'intérieur d'une plage de longueurs d'ondes à partir des longueurs d'ondes infrarouges jusqu'aux longueurs d'ondes ultraviolettes et la longueur d'onde maximale dans l'émission de lumière par les microparticules luminescentes est différente de la longueur d'onde de crête du spectre d'excitation.
PCT/JP2016/068422 2015-06-22 2016-06-21 Milieu de formation d'image d'hologramme et support d'affichage d'image l'utilisant WO2016208590A1 (fr)

Priority Applications (1)

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JP2017524926A JP6724915B2 (ja) 2015-06-22 2016-06-21 ホログラム画像形成用媒体及びそれを用いた画像表示媒体

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JP2015-124743 2015-06-22
JP2015124743 2015-06-22

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WO2016208590A1 true WO2016208590A1 (fr) 2016-12-29

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JP2018165733A (ja) * 2017-03-28 2018-10-25 独立行政法人 国立印刷局 ホログラム及び偽造防止媒体
JP2018196954A (ja) * 2017-05-24 2018-12-13 凸版印刷株式会社 転写印刷方法及び印刷物
US11503309B2 (en) 2018-06-29 2022-11-15 Interdigital Vc Holdings, Inc. Method and apparatus for video encoding and decoding based on adaptive coefficient group

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018165733A (ja) * 2017-03-28 2018-10-25 独立行政法人 国立印刷局 ホログラム及び偽造防止媒体
JP2018196954A (ja) * 2017-05-24 2018-12-13 凸版印刷株式会社 転写印刷方法及び印刷物
US11503309B2 (en) 2018-06-29 2022-11-15 Interdigital Vc Holdings, Inc. Method and apparatus for video encoding and decoding based on adaptive coefficient group

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