WO2012002444A1 - Procédé et appareil de fabrication de support d'identification - Google Patents

Procédé et appareil de fabrication de support d'identification Download PDF

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Publication number
WO2012002444A1
WO2012002444A1 PCT/JP2011/064932 JP2011064932W WO2012002444A1 WO 2012002444 A1 WO2012002444 A1 WO 2012002444A1 JP 2011064932 W JP2011064932 W JP 2011064932W WO 2012002444 A1 WO2012002444 A1 WO 2012002444A1
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WO
WIPO (PCT)
Prior art keywords
code
layer
liquid crystal
hologram
cholesteric liquid
Prior art date
Application number
PCT/JP2011/064932
Other languages
English (en)
Japanese (ja)
Inventor
秀一 星野
逸雄 竹内
宗穂 坂内
亘 井田
Original Assignee
日本発條株式会社
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
Priority claimed from JP2010249422A external-priority patent/JP4714301B1/ja
Application filed by 日本発條株式会社 filed Critical 日本発條株式会社
Priority to CN201180033203.5A priority Critical patent/CN102959476B/zh
Priority to EP11800906.7A priority patent/EP2590033B1/fr
Priority to US13/807,183 priority patent/US20130105076A1/en
Publication of WO2012002444A1 publication Critical patent/WO2012002444A1/fr

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    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/0005—Adaptation of holography to specific applications
    • G03H1/0011—Adaptation of holography to specific applications for security or authentication
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/0252—Laminate comprising a hologram layer
    • G03H1/0256—Laminate comprising a hologram layer having specific functional layer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2249—Holobject properties
    • G03H2001/2276—Polarisation dependent holobject
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/38—Liquid crystal
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/40—Printed information overlapped with the hologram
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/41—Polarisation active layer

Definitions

  • the present invention relates to an identification medium manufacturing method and an identification medium manufacturing apparatus used for identification using a one-dimensional code or a two-dimensional code.
  • a code The management of parts and foods using a one-dimensional code or a two-dimensional code (hereinafter collectively referred to as a code) is known.
  • a code information on the manufacturer, history (for example, logistics process history), authenticity (determining whether or not it is a counterfeit product), date of manufacture, and other information related to the object can be obtained. It becomes possible.
  • a technique for electronically reading a code and transmitting it to obtain various applications and information As a technique for preventing forgery of the code, a technique using a hologram is known (for example, see Patent Document 1).
  • Patent Document 1 provides a technique that makes it difficult to visually recognize the information of an embedded code under normal observation without impairing the hologram effect.
  • electronic reading is performed using a reader
  • this technique there are a method of complicating a code, a method using a special ink or watermark technique, and the like. Details of these techniques are known, and the anti-counterfeit effect is reduced when used. Further, when the code is complicated or a watermark technique is used, it is a problem to ensure the accuracy of reading the code electronically.
  • the invention according to claim 1 is a cholesteric liquid crystal layer that is subjected to hologram processing and selectively reflects circularly polarized light in the first swivel direction when viewed from the reading side, and viewed from the reading side, A structure in which a ⁇ / 4 plate and a linearly polarizing filter layer are laminated, and when natural light is incident from a surface opposite to the surface on the cholesteric liquid crystal layer side, is opposite to the first turning direction.
  • An optical functional layer having a function of selectively transmitting circularly polarized light in the second turning direction toward the cholesteric liquid crystal layer, and a barcode, a two-dimensional code, an OCR code, a hologram code, and a color code to be read
  • a method of manufacturing an identification medium in which a hologram image that obstructs removal is formed by the hologram processing, wherein the step of forming the code forming layer by printing and the code forming layer and the cholesteric liquid crystal layer are integrated A method for manufacturing an identification medium.
  • the invention according to claim 2 is a cholesteric liquid crystal layer that is subjected to hologram processing and selectively reflects circularly polarized light in the first swivel direction when viewed from the reading side, and viewed from the reading side, A structure in which a ⁇ / 4 plate and a linearly polarizing filter layer are laminated, and when natural light is incident from a surface opposite to the surface on the cholesteric liquid crystal layer side, is opposite to the first turning direction.
  • An optical functional layer having a function of selectively transmitting circularly polarized light in the second turning direction toward the cholesteric liquid crystal layer, and a barcode, a two-dimensional code, an OCR code, a hologram code, and a color code to be read
  • An identification medium manufacturing apparatus in which a hologram image that obstructs removal is formed by the hologram processing, wherein a first label portion on which a part or all of the code forming layer can be formed is attached.
  • An identification medium manufacturing apparatus comprising: means; and an attaching means for attaching the second label portion to the code forming layer printed by the printing means.
  • the first aspect of the present invention there is provided a technique for manufacturing an identification medium that can easily detect a counterfeit product that looks similar in appearance and has high code reading accuracy.
  • an identification medium capable of attaching a label portion of a cholesteric liquid crystal layer, which gives a distinguishability to reading of the code forming layer, while forming the code forming layer by printing.
  • a manufacturing apparatus is provided.
  • SYMBOLS 100 Identification medium, 101 ... Transparent protective layer, 102 ... Cholesteric liquid crystal layer, 103 ... Hologram processing, 104 ... [lambda] / 4 plate, 105 ... Linear polarization filter layer, 106 ... Circular polarization filter layer, 107 ... Code printing pattern, 108 DESCRIPTION OF SYMBOLS ... Base film layer, 109 ... Adhesive layer, 300 ... Reading apparatus, 303 ... Light, 304 ... Circularly polarizing filter, 305 ... Stage, 320 ... Magnifying lens, 700 ... Identification medium, 701 ... Separator (release paper), 702 ... Two-dimensional code display, 703 ...
  • FIG. 1 shows an identification medium 100.
  • the identification medium 100 includes a transparent protective layer 101, a cholesteric liquid crystal layer 102, a ⁇ / 4 plate 104, a linearly polarizing filter layer 105, a code printing pattern 107, a base film layer 108, from the observation side (identification surface side). It has a structure laminated with the adhesive layer 109.
  • the transparent protective layer 101 is a layer of a transparent resin film that protects the outermost surface.
  • the transparent protective layer 101 is made of a material that does not disturb the polarization characteristics of transmitted light, such as TAC (triacetyl cellulose).
  • the cholesteric liquid crystal layer 102 has optical characteristics that selectively reflect red right circularly polarized light.
  • the cholesteric liquid crystal layer 102 is subjected to hologram processing 103 performed by pressing an emboss mold. By the hologram processing 103, a concavo-convex structure is imparted to the cholesteric liquid crystal layer 102, and a hologram image is generated by optical interference generated in the concavo-convex structure. This hologram image can be visually recognized by observing the reflected light from the cholesteric liquid crystal layer 102.
  • the ⁇ / 4 plate 104 and the linear polarizing filter layer 105 constitute a circular polarizing filter layer 106 by two layers.
  • the circularly polarizing filter layer 106 has an optical function of selectively transmitting left circularly polarized light on the observation surface side (upper side in the figure) when natural light is incident from the code printed pattern 107 side that is the non-observation surface side. As described above, the orientations of the ⁇ / 4 plate 104 and the linear polarization filter layer 105 are adjusted.
  • the code printing design 107 is a design of a two-dimensional barcode formed by printing ink on the base film layer 108 and constitutes a code forming layer.
  • the base film layer 108 is a resin film layer having a background color that highlights the contents of the printed two-dimensional barcode.
  • the adhesive layer 108 is a layer of an adhesive material.
  • the identification medium 100 is attached to the object by the function of the adhesive layer 108.
  • a separator (release paper) (not shown) is affixed to the exposed surface of the adhesive layer 108, and the separator is peeled off when affixing to an object, and the adhesive layer 109 is exposed to identify the medium. 100 is pasted.
  • symbol pattern printing 107 by printing on the linearly polarizing filter 105 side of the circularly polarizing filter 106, without using a base film.
  • the hologram image formed by the hologram processing 103 is a logo or a pattern that is easily visible.
  • the hologram image and the code pattern are in a positional relationship where at least a part thereof overlaps. This makes it difficult to electronically read the code symbol when the hologram image is detected simultaneously.
  • a hologram image having a content that makes it difficult to read the code more reliably due to the influence of the hologram image may be selected. By doing so, security can be improved more reliably.
  • FIG. 2 conceptually shows the principle of the optical function of the identification medium 100.
  • the optical function of the identification medium 100 in an environment where natural light is irradiated from the cholesteric liquid crystal layer 102 side (the upper side in the figure) will be described.
  • the transparent protective layer 101 is not shown.
  • left circularly polarized light, linearly polarized light, and right circularly polarized light other than red which is not reflected by the cholesteric liquid crystal layer 102, pass through the cholesteric liquid crystal layer 102 and enter the circularly polarizing filter layer 106.
  • the incident light becomes linearly polarized light when it enters the code printing pattern 107 side of the linear polarizing filter layer 105 of the circular polarizing filter layer 106, enters the code printing pattern 107, and is reflected there.
  • the reflected light from the code printing pattern 107 includes a two-dimensional barcode image of the code printing pattern 107.
  • the reflected light from the code printed pattern 107 becomes left circularly polarized light (left swirl circularly polarized light) when it passes through the circularly polarizing filter layer 106 in the lower or upper direction of the figure. That is, the circularly polarizing filter layer 106 has a characteristic that left circularly polarized light is emitted from the ⁇ / 4 plate 104 side when natural light is incident from the linearly polarizing filter layer 105 side. Therefore, the reflected light (linearly polarized light) from the code printed pattern 107 passes through the circularly polarizing filter layer 106 in the upward direction as left circularly polarized light. Since this transmitted light is left circularly polarized light, it passes through the cholesteric liquid crystal layer 102 and is emitted to the observation surface side.
  • Observation through left circular polarization filter A case will be described in which the identification medium 100 is observed through a left circularly polarizing filter 110 (a circularly polarizing filter that selectively transmits left-turning circularly polarized light) 110.
  • the right circularly polarized light reflected from the cholesteric liquid crystal layer 102 is blocked by the left circularly polarized light 110 filter.
  • the reflected light from the code printed pattern 107 that becomes left circularly polarized light at the stage of exiting to the observation surface side of the cholesteric liquid crystal layer 102 passes through the left circularly polarizing filter 110.
  • the observed light 112 does not include the hologram image of the cholesteric liquid crystal layer 102 but includes the two-dimensional barcode image of the code printed pattern 107. That is, when the identification medium 100 is observed through the left circular polarizing filter, the hologram image based on the hologram processing 103 is not visible, and the two-dimensional barcode image of the code printing pattern 107 is visible. An example of this state is shown in FIG. In FIG. 3A, the hologram image 103 ′ (see FIG. 3B) based on the hologram processing 103 is not visible, and the two-dimensional barcode image 107 ′ of the code printed pattern 107 is selectively visible. It is shown.
  • the right circular polarization reflected from the cholesteric liquid crystal layer 102 is the right circular polarization filter 111. Therefore, the observed light 113 includes a hologram image based on the hologram processing 103. On the other hand, reflected light from the code printed pattern 107 that becomes left circularly polarized light at the stage of emitting the cholesteric liquid crystal layer 102 to the observation surface side is blocked by the right circularly polarizing filter 111.
  • FIG. 3B shows a state in which the hologram image 103 ′ based on the hologram processing 103 is selectively visible and the two-dimensional barcode image 107 ′ of the code printing pattern 107 is not visible.
  • FIG. 3C shows a state where the hologram image 103 ′ based on the hologram processing 103 and the two-dimensional barcode image 107 ′ of the code printing pattern 107 can be seen at the same time.
  • FIG. 4 shows an example of a system that performs identification using the identification medium 100.
  • FIG. 4A shows an overview of the whole
  • FIG. 4B shows a state in which the identification medium 100 is imaged with a camera-equipped mobile phone.
  • FIG. 4 shows a data server 201, an Internet line 202, a mobile base station 203, a mobile base station antenna 204, a mobile phone 205, a product 206, an identification medium 100, a camera 208, and a left circular polarization filter 209.
  • the data server 201 collates the decoded information of the two-dimensional barcode information of the identification medium 100.
  • the Internet line 202 is connected to the mobile base station 203, and the mobile base station 203 communicates with the mobile phone 205 via the antenna 204.
  • the mobile phone 205 includes a camera 208 and has a function of decoding two-dimensional barcode information captured by the camera 208 and transmitting the decoded information to the data server 201 via the Internet 202 via the mobile base station 203.
  • the product 206 is a product or product package such as various parts such as electronic parts and machine parts, foodstuffs, daily necessities, clothing, and computer application software.
  • an identification medium 100 in which an authenticity determination function and predetermined contents (for example, information for specifying a manufacturer and history information on physical distribution processes) are encoded and printed is attached.
  • the user images the identification medium 100 through the left circular polarization filter 209 using the camera 208 of the mobile phone 205.
  • Data acquired by the camera 208 is sent to the data server 201 via the mobile base station 203 and the Internet line 202.
  • the data server 201 collates the code of the identification medium 100 with the data to be compared that is stored in the data server 201. Then, the data server 201 sends specific information (for example, information specifying a manufacturer regarding the product 206) to the mobile phone 205 based on the content of the acquired code.
  • an inquiry is made by imaging the identification medium 100, decoding the image data, and sending it to the data server 201, and the inquiry result (answer) is sent from the data server 201 to the mobile phone 205. Displayed on the mobile phone 205.
  • the identification medium 100 is directly imaged without using a circular polarizing filter, a hologram image of the cholesteric liquid crystal layer is also simultaneously imaged. Therefore, the image data cannot be decoded by the two-dimensional bar code (code printing pattern 107) due to the holographic image of the cholesteric liquid crystal.
  • FIG. 5 shows a reading device 300 that reads the identification medium 100 of FIG.
  • the reading device 300 includes an imaging device 301 such as a CCD, a control unit 302, a light 303, a circular polarization filter 304, a magnifying lens 320, and a stage 305.
  • the imaging device 301 captures the identification medium 100.
  • the control unit 302 performs operation control of the entire apparatus, code decoding based on an image captured by the imaging apparatus 301, and authenticity determination.
  • the light 303 irradiates the identification medium 100 with white natural light.
  • the circular polarization filter 304 is an optical filter (in this case, a left circular polarization filter) that blocks circular polarization (in this case, right circular polarization) that is selectively reflected by the cholesteric liquid crystal layer 102 of the identification medium 100.
  • the circularly polarizing filter 304 can be moved by a moving means (not shown) so that it can be retracted from the optical axis (in front of the imaging device 301).
  • the magnifying lens 320 is a magnifying optical system that is used when a code that is small and difficult to visually recognize, such as a micro OCR code, is used.
  • the magnifying lens 320 is also retractable from the optical axis.
  • the stage 305 is a stage on which an object 306 (for example, an electronic component or various products) to which the identification medium 100 is attached is placed.
  • FIG. 6 is a block diagram illustrating a configuration of the control unit 302.
  • the control unit 302 functions as a computer that executes a procedure of a flowchart described later.
  • the control unit includes a CPU, a memory, and an interface, and includes the following functional units configured in software.
  • the control unit 302 includes an image extraction unit 306, a decoding unit 307, a decoded content output unit 308, an image determination unit 309, a decode availability determination unit 310, an authenticity determination unit 311, a notification unit 312, and a drive unit 313.
  • the image extraction unit 306 extracts the contents of the image from the image data.
  • the decoding unit 307 analyzes the extracted image, analyzes and decodes the code (two-dimensional barcode data).
  • the decoded content output unit 308 outputs the decoded two-dimensional barcode information.
  • the information of the two-dimensional barcode unique information (for example, a manufacturing number and various history information) of the object 306 can be cited.
  • the image determination unit 309 determines whether or not the extracted image matches an image (reference image) stored in advance.
  • the decoding possibility determination unit 310 determines whether or not the decoding of the code data in the decoding unit 307 has been normally performed.
  • the authenticity determination unit 311 determines the authenticity of the identification medium 100 based on the determination results of the image determination unit 309 and the decode availability determination unit 310.
  • the notification unit 312 outputs a notification signal that notifies the result of various determinations.
  • the drive unit 313 outputs a drive signal for performing lighting control of the light 303 and movement control of the circular polarization filter 304 and the magnifying lens 320.
  • FIG. 7 is a flowchart illustrating an example of the operation of the reading device 300.
  • a program for executing the processing procedure of FIG. 7 is stored in an appropriate memory area in the control unit 302 and executed by the control unit 302. This program may be stored in an appropriate storage medium and provided from there.
  • the processing is started with the object 306 with the identification medium 100 pasted on the stage 305 in FIG.
  • the light 303 starts to emit light (step S502), and the circularly polarizing filter (left circularly polarizing filter) 304 is retracted from between the imaging device 301 and the identification medium 100 (step S503). ).
  • the identification medium 100 is imaged from the observation surface side (transparent protective layer 101 side) in FIG. 1 by the imaging device 301, and image data obtained by imaging the identification medium 100 is acquired (step S504).
  • image data of the identification medium 100 it is determined whether the two-dimensional barcode information cannot be decoded and whether the obtained image matches (matches) the reference image prepared in advance (match). Step S505).
  • a process of outputting notification information indicating that there is a suspicion of not being authentic (a suspicion of a flaw) is performed (step S506).
  • step S505 when the two-dimensional barcode information cannot be decoded and the obtained image matches a reference image prepared in advance, the circular polarization filter 304 is placed between the imaging device 301 and the identification medium 100.
  • the identification medium 100 is imaged again to obtain image data (step S508).
  • decoding processing is performed on the image data acquired again to determine whether normal decoding has been performed (step S509). If normal decoding is not possible, error processing is performed (step S510). If normal decoding is possible, the decoded content (two-dimensional barcode information of the identification medium 100) is output (step S511). Thereafter, the light emission of the light 303 is stopped (step S512), and the process is terminated (step S513).
  • step S505 authenticity can be determined even in electronic reading by a machine. That is, since the hologram identification medium 100 made to resemble the appearance cannot reproduce the hologram processing 103 on the cholesteric liquid crystal layer 102 well, the determination in step S505 is NO. Even if the determination in step S505 is cleared, if the hologram image remains in the image data in the determination in step S509, the two-dimensional barcode cannot be decoded and an error occurs. The inconvenience that the barcode information is read as normal information is avoided.
  • the identification medium 100 makes it easy to detect forgery of two-dimensional barcode information by performing authenticity determination by visual observation and authenticity determination by electronic reading.
  • the central wavelength (color) selectively reflected by the cholesteric liquid crystal layer 102 is not limited to red, and may be other colors such as green. Further, the turning direction of the circularly polarized light selectively reflected by the cholesteric liquid crystal layer 102 is not limited to the right turning direction, and may be the left turning direction. For example, when the turning direction of the circularly polarized light selectively reflected by the cholesteric liquid crystal layer 102 is the left turning direction, the portion 106 is a right circularly polarizing filter layer.
  • a configuration in which the base film layer 108 and the adhesive layer 109 are transparent and the pasted surface can be seen through is also possible. Further, the adhesive layer 109 may function as a dark color and the adhesive layer may function as a light absorption layer. In this case, the hologram image is emphasized when viewed directly, and the two-dimensional barcode becomes difficult to see.
  • the two-dimensional barcode design may be formed by pasting thin films that have been printed in advance.
  • Modification 1 In the configuration shown in FIG. 1, a configuration in which the circularly polarizing filter layer 106 is omitted is also possible. In this case, in the observation through the right circular polarization filter, in addition to the hologram image, the code printed pattern also appears thin. The observation through the left circular polarizing filter is the same as the case of the identification medium in FIG. In the case of the first modification, in the observation with the circular polarization filter switched, the clear switching between the two-dimensional bar code pattern and the hologram image becomes unclear compared to the identification medium 100 in FIG. Authentication processing by processing and reading processing of two-dimensional barcode information are possible.
  • an OCR code (hereinafter referred to as a micro OCR code) using micro characters having a size that cannot be identified with the naked eye is used instead of the two-dimensional barcode pattern.
  • the microcode OCR code is obtained by encoding (encrypting) specific data with characters, has a size that is difficult to read with the naked eye, and is read through a lens.
  • the use method and characteristics of the identification medium in this case are the same as in the case of the two-dimensional barcode except that the magnifying lens 320 is used and the code system is changed in the apparatus of FIG.
  • the micro OCR code When the micro OCR code is used, it is difficult to read the code visually, so that the hologram image of the cholesteric liquid crystal layer is emphasized, and the visual discrimination using the hologram image is enhanced.
  • the micro OCR code since the micro OCR code has small characters, when the micro OCR code is read by image recognition without using a circular polarizing filter, the illusion effect by the hologram image is larger, and the hologram image becomes a clearer image. In combination with this, the authenticity determination by the determination in step S505 of FIG. 7 can be performed more effectively.
  • the form which reads by reducing the display of a barcode and enlarging with an optical system is also possible.
  • ID number can be used instead of the two-dimensional barcode.
  • the ID number is image-recognized in the configuration shown in FIGS. 5 and 6, and unique information (for example, a manufacturing number, a recognition number, a unique name, etc.) corresponding to the ID number is decoded.
  • the optical function makes it difficult to read the ID number when the circularly polarizing filter using the hologram image of the cholesteric liquid crystal that is difficult to forge is not used.
  • a high forgery determination function can be obtained by the function of accurately reading the ID number when using the circular polarizing filter without being influenced by the hologram image (illusion) and the image content of the hologram image that is difficult to reproduce.
  • the apparatus shown in FIG. 5 includes a right circular polarization filter and a left circular polarization filter, and the right circular polarization filter can be inserted into and retracted from the optical path, and the left circular polarization filter can be inserted into and retracted from the optical path. . That is, when the right circular polarization filter is inserted in the optical path, the identification medium 100 is imaged through the right circular polarization filter, and the hologram code included in the hologram image formed by the hologram processing 103 is read. When the left circular polarization filter is inserted in the optical path, the identification medium 100 is imaged through the left circular polarization filter, and the code of the code printed pattern 107 is read.
  • authenticity can be determined based on the combination of the circular polarization filter and the content of the read code. That is, it is possible to determine the authenticity of the identification medium by determining whether or not the decoding content when the right circular polarization filter is adopted and the decoding content when the right circular polarization filter is adopted match a predetermined content.
  • left and right circular polarization filters are prepared as circular polarization filters arranged in front of the camera 208 of the mobile phone 205, and a program for executing the above method is prepared, which is executed in the code reading server 201.
  • the cholesteric liquid crystal layer 102 is formed on a forming substrate (not shown).
  • the hologram mold is pressed and hologram processing 103 is performed.
  • the cholesteric liquid crystal layer 102 is peeled off from the forming substrate, and the cholesteric liquid crystal layer 102 is fixed to the circularly polarizing filter layer 106 previously integrated with an adhesive by hot pressing or adhesion.
  • the transparent protective layer 101 is adhered to the exposed surface (observation surface) side of the cholesteric liquid crystal layer 102.
  • the identification printing medium 100 shown in FIG. 1 is obtained by fixing both the code printed layer 107 and the linearly polarizing filter layer 105 by heat pressing or bonding so that the code printed layer 107 and the linearly polarizing filter layer 105 are in close contact.
  • the first member laminated with the transparent protective layer 101, the cholesteric liquid crystal layer 102 on which the hologram is formed, and the circularly polarizing filter layer 106, the adhesive layer 109, and the base film layer 108 are laminated.
  • the member 2 is prepared, and after the code printed pattern 107 is formed, the first member and the second member are bonded together to obtain the identification medium 100, and the identification medium 100 is further pasted on the object.
  • a code can be formed by printing on demand, and an identification medium on which the code is printed can be attached to an object.
  • the identification medium using the present invention can be used as, for example, a history management tag having a forgery prevention function.
  • FIG. 8 shows an identification medium 600. 1 are the same as those in FIG.
  • the identification medium 600 includes a hologram reflection layer 603 laminated with a metal reflection layer 601 and an embossing layer 602 from the observation surface side on the non-observation surface side of the circularly polarizing filter layer 106.
  • the embossed layer 602 is a layer obtained by embossing a resin film to form a hologram image.
  • the metal reflection layer 601 is a light reflection layer such as an aluminum vapor deposition layer and has an uneven surface that follows the uneven structure of the underlying embossed layer 602.
  • the hologram reflection layer 603 is configured by the metal reflection layer 601 and the embossed layer 602.
  • the hologram image of the hologram reflection layer 603 includes a hologram code that symbolizes specific data (may include other symbols).
  • the hologram code may be formed of a transfer foil and affixed.
  • the technique described in JP-A-6-191525 can be used.
  • the identification medium 600 images the hologram of the hologram processing 103 and the hologram of the hologram reflection layer 603 at the same time in a state where the circular polarizing filter 304 is retracted from the optical axis. .
  • the hologram code of the hologram reflection layer 603 is masked by the hologram of the hologram processing 103, and it becomes difficult to selectively read the hologram code of the hologram reflection layer 603.
  • the hologram of the hologram processing 103 is selectively imaged, and when the identification medium 600 is imaged through the left circular polarization filter, the hologram of the hologram reflection layer 603 is captured.
  • the code can be read by imaging through a circular polarization filter.
  • Solvent entry paths are provided to make it easier for the solvent to penetrate (penetrate) into the adhesive layer 109 and the base film layer 108, and even if there is a material that develops color when touched with the solvent on the layer of the code design print 107 or its base. Good.
  • a color former or a developer is encapsulated in a microcapsule that is broken when touched by a solvent, and the microcapsule is present in the layer of the code design print 107.
  • the adhesive function of the adhesive layer 109 is lowered using a solvent and the identification medium 100 is illegally peeled from the object, the solvent enters the inside from the adhesive layer 109.
  • the code design printing 107 may be formed with an ink containing a dye that dissolves in a solvent in a configuration in which a solvent intrusion path is provided so that the solvent easily enters the adhesive layer 109 and the base film layer 108. .
  • the identification medium 100 is to be peeled off from the object with the solvent, the printed content of the code design print 107 is blurred and the code cannot be read. That is, the identification medium 100 cannot be illegally reused.
  • the technique described in JP-A-10-250228 can be used.
  • Examples of the ink containing a dye that dissolves in the above solvent include 58 parts by weight of pentaerythritol triacrylate, 29 parts by weight of ethylene oxide-modified bisphenol A diacrylate, 8 parts by weight of an organic solvent-soluble dye, 2,2-dimethoquine- Examples include 2-phenylacetophenone composed of 5 parts by weight.
  • FIG. 9A shows a state in which the identification medium 700 is viewed from the front.
  • the identification medium 700 is used by being affixed to mechanical parts, electronic parts, various other products (or packages thereof).
  • the identification medium 700 includes a two-dimensional code display 702 and a hologram display 703 provided to overlap the two-dimensional code display 702.
  • the two-dimensional code display is, for example, a two-dimensional barcode, and various types of information related to the target object to which the identification medium is pasted and information such as an internet address from which information about the target object can be acquired are encoded and stored.
  • the identification medium 700 includes an other print display 704 on which a product name, a manufacturer, a lot number, and other information are printed and displayed.
  • FIG. 9B shows a cross-sectional structure in a state where the separator 701 is attached to the identification medium 700.
  • the identification medium 700 uses the base paper 712 as a base material.
  • An adhesive layer 711 made of an adhesive material is provided on the lower surface side of the base paper 712 in the figure.
  • the surface of the base paper 712 opposite to the side on which the adhesive layer 711 is provided (upper surface in the figure) is provided with a two-dimensional code display 702 provided by printing and an ink layer constituting the other print display 704. It has been.
  • An optically transparent adhesive layer 714 is provided on the two-dimensional code display 702, and a circularly polarizing filter layer 717 in which a linearly polarizing filter layer 715 and a ( ⁇ / 4) plate 716 are laminated thereon is disposed.
  • a circularly polarizing filter layer 717 in which a linearly polarizing filter layer 715 and a ( ⁇ / 4) plate 716 are laminated thereon is disposed.
  • a cholesteric liquid crystal layer 718 is provided on the circularly polarizing filter layer 717.
  • the cholesteric liquid crystal layer 718 is embossed for performing the hologram display 703.
  • the rotational direction of the circularly polarized light selectively reflected by the cholesteric liquid crystal layer 718 and the rotational direction of the circularly polarized light transmitted through the circularly polarizing filter layer 717 from the bottom to the top of the figure are set to be opposite to each other. Yes.
  • the hologram display 703 is formed at a position overlapping the two-dimensional code display 702.
  • a transparent protective layer 719 made of a TAC film or the like is provided on the cholesteric liquid crystal layer 718.
  • the cholesteric liquid crystal layer 718 selectively reflects the right circularly polarized light and the left circularly polarized light is selectively transmitted through the circularly polarized filter layer 717 from the bottom to the top of the figure.
  • the identification medium 700 is directly viewed, the two-dimensional code display 702, the hologram display 703, and the other print display 704 are visually recognized.
  • the hologram display 703 becomes an obstacle, and the code cannot be read from the two-dimensional code display.
  • the identification medium 700 when the identification medium 700 is observed through the left circular polarizing filter, the reflected light from the cholesteric liquid crystal layer 718 cannot be observed.
  • the left circularly polarized light included in the reflected light from the two-dimensional code display 702 is transmitted through the circularly polarizing filter layer 717 from the bottom to the top of the figure, and the transmitted light of the left circularly polarized light is transmitted to the cholesteric liquid crystal layer. 718 and the left circular polarizing filter which is a viewer are transmitted.
  • the two-dimensional code display can be selectively and clearly observed.
  • optical reading of the two-dimensional code display 702 using the reading device becomes possible.
  • the identification medium 700 when the identification medium 700 is observed through the right circular polarization filter, the reflected light from the cholesteric liquid crystal layer 718 is preferentially observed, and the reflected light from the two-dimensional code display 702 cannot be observed. This is because the reflected light of the left circularly polarized light from the two-dimensional code display 702 is blocked by the right circular polarizing filter that is a viewer. Further, when the identification medium 700 is tilted in this state and the viewing angle is changed, a color shift of the cholesteric liquid crystal layer 718 is observed, and an identification function based on a change in the hue is obtained.
  • the identification medium 700 attached to the separator 701 includes a paper label portion 720 and a hologram label portion 730.
  • the paper label portion 720 and the hologram label portion 730 are made separately, and are combined by the adhesive function of the adhesive layer 714, whereby the identification medium 700 is obtained.
  • FIG. 10 shows a state in which a plurality of paper label portions 720 are attached to a ribbon-like separator 701 and formed into a tape shape.
  • FIG. 10A is a view from the front, and FIG. 10B is a side view showing a state of being wound around a roll 721.
  • FIG. 11 shows a state in which a plurality of hologram label portions 730 are attached to a ribbon-like separator 731 and formed into a tape shape.
  • FIG. 11A is a view from the front, and FIG. 11B is a side view showing a state wound around a roll 732.
  • the hologram label portion 730 is peeled off from the separator 731 and attached to the hologram display portion 702 (see FIG. 9) of the paper label portion 720, whereby the identification medium 700 in a state of being attached to the separator 701 shown in FIG. Is obtained.
  • FIG. 12 shows an example of an identification label manufacturing apparatus for manufacturing an identification label having a configuration in which the identification medium 700 is attached to the separator 701 shown in FIG.
  • FIG. 12 shows an identification label manufacturing apparatus 750.
  • a roll 721 shown in FIG. 10 is attached to the identification label manufacturing apparatus 750.
  • a separator 701 to which a plurality of paper label portions 720 (see FIG. 9C) is attached is wound.
  • the separator 701 is provided with perforations so that it can be easily separated later.
  • the separator 701 to which the plurality of paper label portions 720 are attached is unwound from the roll 721 and reaches the guide roll 752 through the guide roll 751.
  • the roll 732 shown in FIG. 11 is attached to the identification label manufacturing apparatus 750.
  • a ribbon-like separator 731 with a plurality of hologram label portions 730 (see FIG. 9C) attached thereto is wound around the roll 732 by the adhesive force of the adhesive layer 714.
  • the separator 731 is unwound from the roll 732 in synchronization with the unwinding of the separator 701 from the roll 721 described above.
  • the separator 731 having the hologram label portion 730 unwound from the roll 732 is sent to an affixing roller 754 constituted by a pair of opposed rolls, where the two-dimensional code printing 702 and other print indications of the paper label portion 720 are sent. 704 is in contact with the surface being performed.
  • the adhesive layer 714 of the hologram label 730 comes into contact with the two-dimensional code print 702 portion of the paper label portion 720.
  • the hologram label 730 is reliably attached to the paper label portion 720 by the pressure received from the attaching roller 754.
  • the separator 731 of FIG. 12 is not shown. This pasting is performed by the adhesive function of the adhesive layer 714.
  • heat or ultraviolet light may be irradiated according to the material of the adhesive layer 714 to promote the expression of the adhesive function.
  • the separator 731 after the hologram label 730 is attached to the paper label portion 720 side is taken up by a take-up roll 755.
  • the separator 701 is perforated so that the individual identification medium 700 can be separated together with the separator 701, and the label-shaped identification medium 700 is attached to the separator 701 by a simple operation. Can be obtained.
  • the identification label 700 shown in FIG. 12 can form the hologram label portion 730 that gives the paper label portion 720 distinctiveness in reading the print contents while performing printing in real time by the print head 735.
  • This operation can be performed at the production site or distribution site of the product to be identified (for example, the site where packaging for shipping is performed). For example, in a facility where products are shipped, information corresponding to each product with various specifications customized for each customer is printed as a two-dimensional code display 702 from the print head 753, and the identification is provided on the information. Therefore, the operation for forming the hologram display 703 can be performed.
  • hologram processing is performed, and a cholesteric liquid crystal layer that selectively reflects circularly polarized light in the first turning direction and a code to be read are formed.
  • An identification medium comprising a code forming layer in order, and a hologram image that obstructs reading of information of the code when formed simultaneously with the code by an optical reading device is formed by the hologram processing.
  • the optical reading device for example, a barcode reader
  • an image for example, a two-dimensional barcode
  • a hologram image of a cholesteric liquid crystal layer are detected simultaneously.
  • the data cannot be read only by performing the optical reading directly with the optical reading device.
  • the reflected light of the cholesteric liquid crystal layer is circularly polarized light in either the right or left turning direction, and has a very high blocking property (non-transmitted characteristic) when the reflected light is blocked by a circular polarizing filter. Moreover, since it is circularly polarized light, even if the circularly polarizing filter is rotated, the characteristic for blocking the circularly polarized light in the reverse turning direction does not change.
  • the code formation layer has a function of obstructing the reading of the code of the code forming layer by the hologram image of the cholesteric liquid crystal layer, and the code formation by blocking the reflected light from the cholesteric liquid crystal layer by the circular polarizing filter
  • the detection S / N can be secured at the same time when the code information of the layer is optically detected.
  • the cholesteric liquid crystal layer has an optical characteristic of selectively reflecting a specific center wavelength, contact copying of a hologram interference structure using a photosensitive material (an embossed structure constituting a hologram) cannot be easily performed. It also has a forgery difficulty that it is difficult to reproduce the hologram type.
  • the code cannot be clearly seen because it is disturbed by the hologram image, but selectively transmits circularly polarized light selectively reflected by the cholesteric liquid crystal used and circularly polarized light in the reverse rotation direction.
  • the code is detected optically through the circular polarizing filter, the influence of the hologram image is eliminated, and an identification medium that can read the code is provided.
  • the following forgery prevention effect can be obtained.
  • a counterfeit product that is not a cholesteric liquid crystal hologram but a normal hologram layered on a code is forged, and a forged product that closely resembles the appearance is produced, only the code is clear by observation through a circular polarizing filter. It is easy to detect forgery because it is impossible to obtain the visual effect that the image looks like or the image of the code becomes weaker and the hologram appears to emerge clearly.
  • the reading format of the optical reading device is not limited as long as it is a format for optically reading a code. And a format for detecting a pattern of reflected light by the light receiving sensor array.
  • a second disclosed content is a second swiveling direction opposite to the first swiveling direction when natural light is incident from a surface opposite to the surface on the cholesteric liquid crystal layer side in the first disclosed content.
  • An optical functional layer that selectively transmits the circularly polarized light toward the cholesteric liquid crystal layer is disposed between the cholesteric liquid crystal layer and the code forming layer.
  • the reflected light from the code forming layer enters the optical function layer and then enters from the non-observation surface side (the surface side opposite to the optical reading side) of the cholesteric liquid crystal layer.
  • This incident light becomes circularly polarized light in a second turning direction opposite to the turning direction of the circularly polarized light (first turning direction) selectively reflected by the cholesteric liquid crystal layer by the function of the optical function layer. Therefore, when the identification medium is observed through a circularly polarizing filter that selectively transmits circularly polarized light in the first turning direction, the circularly polarized light in the second turning direction is blocked by the circularly polarizing filter.
  • the code is not visible, and the hologram image from the cholesteric liquid crystal layer is clearly visible. Therefore, the discrimination with the naked eye using the hologram image is enhanced. This is the same when an optical reading device is used, and the discrimination by detecting a hologram image is enhanced.
  • the circularly polarized light component in the swivel direction is mixed with the reflected light from the cholesteric liquid crystal layer and is transmitted through the circularly polarized light filter. For this reason, it is impossible to clearly see only the hologram image, and the code is also visually recognized at the same time. The same applies to reading using an optical reading device. Therefore, the visibility of the hologram image alone of the cholesteric liquid crystal layer and the reading accuracy by the image reading device are lowered.
  • the code is configured by one or more selected from a bar code, a two-dimensional code, an OCR code, a hologram code, and a color code.
  • Various codes and standards are known (or proposed), but any of them can be used in the present invention.
  • the OCR code is a code displayed in characters
  • the color code is a code composed of a combination of a plurality of colors. These codes can be used in combination of a plurality of types.
  • the code reading is performed by detecting the brightness of reflected light as a digital signal corresponding to 0, 1 (Hi state, Lo state), and an image pickup device such as reading a two-dimensional barcode using the camera function of a mobile phone.
  • the fourth disclosed content is characterized in that, in the third disclosed content, the code has a size that is difficult to recognize with the naked eye.
  • a barcode, a two-dimensional code, an OCR code, a hologram code, a color code, or the like has a size that is difficult to recognize with the naked eye, and can be read by enlarging it through an enlargement optical system. It is said. By doing so, the appearance of the hologram image of the cholesteric liquid crystal layer becomes dominant when viewed directly, and an identification medium in which the code is difficult to visually recognize with the naked eye is provided.
  • the hologram image forms a code different from the code formed on the code forming layer.
  • a code hologram code
  • a code (hologram code) using a hologram image of the cholesteric liquid crystal layer is also used. Can do more. Further, higher discrimination can be obtained by reading only one data or a combination of reading both data.
  • the right circular polarization filter and the left circular polarization filter can clearly detect the reflected light from the code forming layer and the reflected light from the cholesteric liquid crystal layer. it can. Therefore, by using the first circular polarization filter, it is possible to selectively detect the reflected light from the cholesteric liquid crystal layer and thereby read the hologram code selectively. Further, by using the second circularly polarizing filter, it is possible to selectively detect the reflected light from the code forming layer and thereby selectively read the code information of the code forming layer.
  • hologram processing is performed, and a cholesteric liquid crystal layer that selectively reflects circularly polarized light in the first swivel direction and a code to be read are formed.
  • the data reading method is characterized in that the code is selectively read through a circularly polarizing filter that blocks the circularly polarized light in the first turning direction by an optical reading device.
  • the circular polarization filter that blocks the circularly polarized light in the first turning direction when the circular polarization filter that blocks the circularly polarized light in the first turning direction is not used, the code cannot be read, and the circular polarization filter that blocks the circularly polarized light in the first turning direction is used.
  • a method of reading data that can read the code is provided. That is, if a circular polarizing filter is not used, the hologram image and the code of the cholesteric liquid crystal layer can be seen at the same time, so that reading of the code is hindered.
  • the identification medium is observed through a circularly polarizing filter that transmits circularly polarized light in the first turning direction, only the reflected light from the cholesteric liquid crystal layer can be seen, so that the code cannot be read. In this way, a technique is provided in which a code cannot be read unless a circularly polarizing filter that transmits a specific turning direction is used.
  • the hologram and the code of the cholesteric liquid crystal layer are simultaneously read by an optical reader, and the selective reading of the code and the hologram and the code are performed. Based on the simultaneous reading, the authenticity of the identification medium is determined.
  • An eighth disclosure is an apparatus for determining the authenticity of the identification medium according to any one of the first to fifth disclosures, wherein the circular polarization filter blocks the circularly polarized light in the first turning direction.
  • An identification device comprising reading means for selectively reading the code via a key.
  • a ninth disclosure is a method for manufacturing the identification medium according to any one of the first to fifth disclosures, the step of forming the code forming layer by printing, the code forming layer, And a step of integrating the cholesteric liquid crystal layer with the cholesteric liquid crystal layer.
  • a tenth disclosure is an identification medium manufacturing apparatus for manufacturing the identification medium according to any one of the first to fifth disclosures, wherein a part or all of the code forming layer can be formed.
  • An identification medium comprising: a roll of: a printing unit that prints the code forming layer; and a bonding unit that bonds the second label portion to the code forming layer printed by the printing unit. It is a manufacturing apparatus.
  • an identification medium in which a counterfeit product having a similar appearance with a cholesteric liquid crystal layer hologram can be easily found.
  • the cholesteric liquid crystal layer selectively reflects circularly polarized light in a specific direction of rotation and transmits circularly polarized light in the opposite direction, thereby passing a hologram of the cholesteric liquid crystal layer.
  • the code pattern of the code forming layer cannot be seen and the hologram of the cholesteric liquid crystal layer can be clearly seen in the observation through the circular polarizing filter.
  • an identification medium conforming to various code standards can be obtained.
  • an identification medium that makes it difficult to recognize the code with the naked eye is provided.
  • an identification medium that can handle more code information and obtain a higher identification function.
  • the seventh disclosure it is possible to handle a larger amount of code information and to provide a data reading method capable of obtaining a higher identification function.
  • an identification medium identification device having the superiority of the invention described in any one of the first to fifth disclosures.
  • an identification medium manufacturing apparatus capable of attaching a label portion of a cholesteric liquid crystal layer that gives discrimination to reading of the code forming layer while forming the code forming layer by printing Is provided.
  • the present invention can be used for a technique for identifying authenticity.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Optics & Photonics (AREA)
  • Credit Cards Or The Like (AREA)
  • Holo Graphy (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un support d'identification qui facilite le repérage d'un code de contrefaçon parmi des codes qui ont apparemment le même aspect et qui permet une lecture extrêmement précise de codes. A partir du coté de la lecture, le support d'identification comprend séquentiellement une couche de cristaux liquides cholestériques à hologramme traité (102) pour réfléchir une polarisation circulaire droite ; une couche de filtre à polarisation circulaire (106) dans laquelle une lame λ/4 et une couche de filtre à polarisation linéaire sont empilées en couches dans cet ordre depuis le côté de la lecture et qui transmet sélectivement une polarisation circulaire gauche vers la couche de cristaux liquides cholestériques (102) lorsque de la lumière naturelle est incidente sur celle-ci du côté opposé à la couche de cristaux liquides cholestériques (102) ; et un motif d'impression de code (107) sur lequel un code bidimensionnel est formé. Le procédé est caractérisé en ce qu'il comprend une étape de formation du motif d'impression de code (107) par impression et une étape d'intégration du motif d'impression de code (107) et de la couche de cristaux liquides cholestériques (102).
PCT/JP2011/064932 2010-07-02 2011-06-29 Procédé et appareil de fabrication de support d'identification WO2012002444A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201180033203.5A CN102959476B (zh) 2010-07-02 2011-06-29 识别介质的制造方法及识别介质的制造装置
EP11800906.7A EP2590033B1 (fr) 2010-07-02 2011-06-29 Procédé et appareil de fabrication de support d'identification
US13/807,183 US20130105076A1 (en) 2010-07-02 2011-06-29 Method and apparatus for production of identification medium

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2010152321 2010-07-02
JP2010-152321 2010-07-02
JP2010-249422 2010-11-08
JP2010249422A JP4714301B1 (ja) 2010-07-02 2010-11-08 識別媒体および識別装置
JP2011067432A JP5315373B2 (ja) 2010-07-02 2011-03-25 識別媒体の製造方法および識別媒体の製造装置
JP2011-067432 2011-03-25

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CN102984425A (zh) * 2012-12-18 2013-03-20 威海华菱光电股份有限公司 全息图图像信息识别的接触式图像传感器

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JPH06191525A (ja) 1992-12-25 1994-07-12 Nhk Spring Co Ltd ラベル取付け装置
JPH10250228A (ja) 1997-03-13 1998-09-22 Mitsubishi Paper Mills Ltd 偽造防止シート及び偽造防止粘着ラベル
JP2008055813A (ja) 2006-09-01 2008-03-13 Nhk Spring Co Ltd 識別媒体、物品、識別装置および識別媒体の識別方法
JP2008268776A (ja) 2007-04-25 2008-11-06 National Printing Bureau 埋め込み情報を有するホログラムシート、ホログラムシートが貼付された偽造防止媒体及びその読み取り方法並びにその読み取り装置
JP2009172798A (ja) * 2008-01-22 2009-08-06 Nhk Spring Co Ltd 識別媒体およびその製造方法

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JPH06191525A (ja) 1992-12-25 1994-07-12 Nhk Spring Co Ltd ラベル取付け装置
JPH10250228A (ja) 1997-03-13 1998-09-22 Mitsubishi Paper Mills Ltd 偽造防止シート及び偽造防止粘着ラベル
JP2008055813A (ja) 2006-09-01 2008-03-13 Nhk Spring Co Ltd 識別媒体、物品、識別装置および識別媒体の識別方法
JP2008268776A (ja) 2007-04-25 2008-11-06 National Printing Bureau 埋め込み情報を有するホログラムシート、ホログラムシートが貼付された偽造防止媒体及びその読み取り方法並びにその読み取り装置
JP2009172798A (ja) * 2008-01-22 2009-08-06 Nhk Spring Co Ltd 識別媒体およびその製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102984425A (zh) * 2012-12-18 2013-03-20 威海华菱光电股份有限公司 全息图图像信息识别的接触式图像传感器

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