JP2013091203A - Image organizer, personal authentification medium, and method for manufacturing personal authentification medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image organizer which includes prevention performance for counterfeiting, tempering and falsification, and highly-discernable performance having high visibility by which even if the injustices are conducted, a fraudulent article can easily found out by for example, observation of the fraudulent article, and to provide a personal authentification medium and a method for manufacturing the personal authentification medium.SOLUTION: Individual information 59 is displayed as an image on one surface on a transparent substrate 51, the individual information 59 is composed of the image including a plurality of micro-area dot cells 49 having OVD layer as a component, and the individual information 59 is expressed by controlling optionally brightness through an outer stimulus on at least one of the OVD layer.

Description

  The present invention is an image forming body that prints, prints, and draws a face image or a fingerprint, which is the key to individual identification, on a personal authentication medium using a transfer material such as a passport or a visa, or a card, and personal authentication. In particular, it is difficult to forge and tamper with personal identification information such as images of legitimate owners' faces and fingerprints by combining diffraction gratings or cells with irregularities in the shape of diffraction gratings, and personal authentication. It relates to what the examiner who conducts makes it easy to identify.

  Various information security methods have been proposed for information recording media related to personal authentication such as passports, visa stickers, and cards. For example, in the case of a passport that is currently used, according to the provisions of so-called ICAO (abbreviation for International Civic Aviation Organization), it must be readable by both visual and optical character identification methods. The ICAO regulations are at the discretion of each country regarding the materials and security used for passports, and the most commonly used security functions include chemical reactants that react with organic solvents, iris colored pearl chips, fiber (Silk or synthetic fiber, visible or invisible, fluorescent or non-fluorescent), paper or film with faded ink, fluorescent ink, heat-sensitive ink, optical ink, security thread of film printed with hologram or micro letters Various techniques such as various inks such as changing ink (so-called OVI), fine line printing, rainbow printing, intaglio printing, pixel printing, etc. are incorporated to improve security and aesthetics at the same time.

  In addition, a face photograph as visual confirmation information of a passport is a past photograph pasted together, but recently, there is a tendency to digitize the photograph information and reproduce it in a passport. As a method for reproducing images on a passport, thermal transfer recording method using a transfer ribbon using a sublimation dye (heat transferable dye), a resin-type melt type in which a pigment is dispersed, or a wax melt type, or an electrophotographic method is examined. Has been.

In addition to the above-mentioned methods, the passport image reproduction method includes a recording method using an ink jet printer (see, for example, Patent Document 1), and a laser printing recording method using a CO ₂ or YAG laser and a thermal color former (for example, Patent Document). 2), and further, laser engraving printing recording method (for example, see Patent Document 3) in which printing is also performed in the depth direction of the substrate using carbon present in the substrate.

  Some visa stickers have been devised such as using ones with cuts in a certain pattern so that it is difficult to remove the sticker itself even if it is going to be peeled off.

  Further, as an image display body containing this kind of personal recognition data, an image pattern formed based on the image data is provided on a card substrate such as polyvinyl chloride, or a hologram in addition to the image pattern. And those having a so-called OVD (abbreviation of Optical Variable Device) image typified by using an optical thin film using diffraction grating or multilayer interference (effects such as color shift can be obtained by optical design). Are known.

  These OVD techniques for holograms and diffraction gratings require advanced manufacturing techniques and are difficult to duplicate, and thus have been used for cards such as credit cards, ID cards, and prepaid cards as effective forgery prevention means. Furthermore, due to its high decorativeness, it is often used for packaging materials, books, pamphlets, POPs, and the like. As a means for sticking these OVDs to articles, a method of transferring and forming using a transfer foil has been conventionally employed. This type of transfer consists of a release layer, a relief layer on which an image pattern of a hologram or diffraction grating is formed on a support, a reflection layer formed by a known thin film forming means, and an adhesive layer in sequence. Things are known. These OVD patterns (holograms and diffraction grating patterns) engraved on the transfer foil are replicated in large quantities by the well-known method of copying a minute uneven pattern onto a nickel-based press plate and heating and pressing it onto a relief layer. Yes.

  In addition, the reflective layer is formed as a transparent hologram or a transparent diffraction grating by forming transparent materials having different refractive indexes by a known thin film forming means such as a vacuum deposition method (hereinafter referred to as a transparent thin film layer). Is a known technique. In this case, it is clear from an optical point of view that the greater the difference in refractive index between the relief layer and the transparent thin film layer, the greater the reflectance. However, in general, there is a relationship of (refractive index of relief layer) <(refractive index of transparent thin film layer).

  The hologram or diffraction grating structure thus obtained is used as a means for preventing counterfeiting, such as credit cards, cash cards, membership cards, employee cards, prepaid cards, driver's licenses, gift cards, gift certificates, etc. In addition to various paper vouchers such as stock certificates, various forms such as application forms, receipts, and copy slips, various booklets such as passports, passbooks, and pension notebooks, covers such as books and notebooks, and displays such as panels It is used by adhering to a part or the whole.

  In addition, the whole described in the present invention has a conceptual meaning, regardless of a pattern, a pattern, or the like, a spot shape, a stripe shape, a thing stuck on a lattice, a regular shape, an irregular shape halftone dot Also included are those stuck with dots in the shape of a circle.

  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. At present, when the forgery technology has been developed, there is a possibility that the transfer layer is once removed by some method, the image data or the like is altered, and then the OVD transfer foil is placed again.

  In addition, in consideration of the situation in which the sublimation transfer method, the heat-melting transfer ribbon method, or the electrophotographic method, as a means for forming image information such as a facial photograph, is now widely used, an image forming unit It is becoming difficult to say that it is always difficult to form a new image in the area after removing the image.

  In order to solve the above problems, a method of putting a plurality of pieces of information for identifying an individual in addition to a face photograph has been considered. There is a method of authenticating by putting digital watermark information in a face photo, storing the information in an IC chip in the same medium, and collating the digital watermark information with the information of the IC chip (for example, see Patent Document 4). ). Also, the feature points of the facial photo information are digitized, and the values are converted into a two-dimensional code and printed on the same medium. There is a method of authenticating by collating two-dimensional code data with feature points of a face photograph (see, for example, Patent Document 5).

  However, the above-described method requires a dedicated decoder for reading a facial photograph, an IC chip, and a two-dimensional code, and there is a problem that authentication cannot be performed by anyone other than the person who owns the reading device and the decoder.

  As another verification method, a method of putting a plurality of face photographs that can be authenticated by visual information can be considered. In addition to the face photograph provided by the above method, there is a method of forming the same face photograph using a fluorescent material (see, for example, Patent Document 6, Patent Document 7, and Patent Document 8). Further, there is a method of forming a facial photograph by converting a pearl pigment into a melt-type thermal transfer ink ribbon (see, for example, Patent Document 9).

  However, in the method using the fluorescent material, since it is necessary to use an ultraviolet lamp (black light), the scenes that can be authenticated are limited. On the other hand, a face photograph with a pearl pigment can be confirmed by visual observation, but since the particles of the pearl pigment are large, it is difficult to form a fine image, and there is a problem that only a supplementary authentication is possible.

  Further, as a technique for preventing forgery of personal authentication media, a method of hologramizing personal information such as a face photograph on demand is also considered. For example, a thermal transfer method using a hologram ribbon (for example, see Patent Document 10) is known, but this method has a limit in the resolution of an on-demand hologram that can be expressed, and the higher the resolution, the worse the image quality becomes. As a result, there is a problem in that it is difficult to determine the authenticity by visual inspection.

JP 2002-226740 A JP 49-131142 A JP 2006-123174 A Japanese Patent Laid-Open No. 2001-126046 JP 2004-70532 A JP-A-7-125403 JP 2000-141863 A JP 2002-226740 A Japanese Patent Laid-Open No. 2003-170685 JP 10-049647 A

  The present invention has been made in view of the above-mentioned problems of the prior art, and has a prevention performance against counterfeiting, tampering or alteration, and the displayed personal information can be clearly seen at a high resolution, and in the unlikely event An object of the present invention is to provide an image forming body having high security that can be easily found by observing a suspected fraudulent product, a personal authentication medium, and a manufacturing method thereof.

  The invention according to claim 1 is a legitimate owner or user who holds the individual authentication medium on at least one surface of the transparent substrate in an image forming body used for the purpose of forgery prevention and personal authentication. Individual information including at least one of a face image, a fingerprint, a signature, and the like that can identify the issuer and the creator is displayed as an image, and the individual information is an adhesive layer, OVD on the transparent substrate. By providing a plurality of dot-like cells having a minute area, which are laminated in the order of the layer and the transparent resin layer, an image is displayed using the dot-like cells as constituent elements, and the individual information is at least one of the OVD layers. The image forming body is characterized in that the portion is expressed by arbitrarily controlling luminance by an external stimulus.

  The invention according to claim 2 is characterized in that the transparent OVD layer has a transparent resin layer that forms fine irregularities in the form of holograms or diffraction gratings, and a transparent coating layer provided so as to cover the fine irregularities surface. The image forming body.

  The invention according to claim 3 is characterized in that the transparent OVD layer has a transparent resin layer that forms fine irregularities in a hologram or diffraction grating shape, and a metal coating layer provided so as to cover the fine irregularities. The image forming body.

  The invention according to claim 4 is characterized in that at least a part of the OVD layer is whitened by applying a thermal pressure as the external stimulus, and the luminance reduction is controlled by the intensity of the thermal pressure. It is.

  The invention according to claim 5 is an image forming body characterized in that at least a part of the OVD layer is discolored by irradiating with radiation as the external stimulus, and brightness reduction is controlled by the intensity of the radiation. .

  The invention according to claim 6 displays, on the surface on the side where the individual information is displayed, an image which is the same as the individual information and is displayed in color (including white and black) with color ink, and character information. An image forming body comprising an individual information printing layer formed as described above.

  The invention according to claim 7 is the image forming body characterized in that the area of the image displayed on the individual information print layer is 0.1 to 30 times the area of the individual information.

  The invention according to claim 8 is characterized in that a fixed OVD layer for displaying a fixed design irrelevant to the individual information by forming a hologram or diffraction grating-like fine irregularities is provided in part. It is.

  The invention according to claim 9 is a personal authentication medium in which the image forming body according to claims 1 to 8 is transferred to a substrate to be transferred.

  The invention according to claim 10 is the personal authentication medium, wherein a fine pattern is printed on the surface of the substrate to be transferred.

  The invention according to claim 11 is a manufacturing method for manufacturing the personal authentication medium according to claims 9 and 10, wherein the dot-shaped cells with a small area are provided on a transparent intermediate foil by thermal head thermal transfer, By forming at least partially overlapping the dot-like cells, the image forming body is formed as an image having the dot-like cells as constituent elements, and then this is formed by thermal transfer onto one surface of the substrate to be transferred. This is a method of manufacturing a personal authentication medium.

  According to invention of Claim 1, the image forming body which has the individual information formed with the hologram is provided. Since it is difficult to form a hologram image by forgery, the security is also improved. In addition, by controlling the luminance of the hologram, the expressive power of individual information can be greatly increased, visibility and resolution can be improved, and it is easy to determine the authenticity of a personal authentication medium visually.

  According to the invention of claim 2, since the individual information can be formed by a transparent hologram, other character information and the like can be expressed without being concealed.

  According to invention of Claim 3, the brightness | luminance of the hologram of individual information improves, and visibility improves markedly.

  According to the fourth and fifth aspects of the present invention, since the luminance can be controlled by targeting an arbitrary hologram portion, the visibility and resolution can be improved, and the authenticity determination of the personal authentication medium can be easily performed visually.

  According to the invention of claim 6, for the examiner who identifies whether the person who owns the article of the present invention is the true owner, the image displayed by the individual information printing layer and the individual information hologram Since the images are selected from the personal authentication information of the same person, it is possible to easily identify the person by visually comparing the two images. Therefore, it is possible to provide an easy-to-find performance that can easily find the suspected fraudulent product.

  According to invention of Claim 7, the area of the image of an individual information printing layer is an area of 0.1-30 times with respect to the area of an individual information hologram, Therefore The area of each image is changed according to a use. Since it can be changed, two pieces of individual information can be easily compared and authenticated. In addition, since the configuration can be further complicated, the effect of preventing forgery has been increased, and it has become possible to make reproduction and alteration more difficult. On the other hand, if the area of the image of the individual information printing layer is smaller than 0.1 times the area of the individual information hologram, it is difficult to compare and authenticate the two pieces of individual information, and more than 30 times. It became difficult to compare and authenticate two pieces of individual information.

  According to the invention of claim 8, the security can be further improved by providing the fixed handle OVD layer which is not related to the individual information by the diffraction grating or the like.

  According to the ninth aspect of the invention, since the hologram information that is the individual information having the individual information formed by the hologram can be expressed at a higher resolution than usual, the visibility is further improved, and False determination can be easily made visually.

  According to the tenth aspect of the present invention, it is possible to improve the difficulty of forgery by printing a counterfeit pattern for preventing counterfeiting in advance on the transfer surface of the substrate. This is because, for example, when a person who attempts to counterfeit tries to transfer the hologram design directly to the base material side instead of the intermediate transfer method, it is not possible to perform an easy adhesion process such as a primer. For example, if the hologram pattern is transferred directly to the substrate side, the effect of the unevenness of the substrate will be noticeable, so a process to eliminate the unevenness before transfer is necessary. The appearance of the pattern is different from the regular product, and it is possible to easily determine that the pattern is a counterfeit product.

  According to the manufacturing method of the eleventh aspect, the individual information hologram is transferred to the intermediate foil to form the image forming body, which is subsequently transferred to the transfer substrate. Thereby, an individual information hologram can be provided between the intermediate foil and the support, and the effect of preventing forgery and tampering can be further improved.

FIG. 3 is a cross-sectional view illustrating the main part of the image forming body according to the embodiment of the present invention. It is sectional drawing shown in order to demonstrate the principal part of the image forming body which concerns on other embodiment of this invention. It is sectional drawing shown in order to demonstrate the detail of the dot-shaped cell formed in FIG.1 and FIG.2. It is sectional drawing shown in order to demonstrate the principal part of the personal authentication medium which concerns on one Embodiment of this invention. It is sectional drawing shown in order to demonstrate the principal part of the personal authentication medium which concerns on other embodiment of this invention. It is the top view which showed the Example of the personal authentication medium based on this invention.

  The image forming body according to the present invention is such that an image of individual information is thermally transferred onto a transparent intermediate foil by a hologram ribbon. The personal authentication medium according to the present invention is formed by thermally transferring the image forming body onto a transfer substrate, and may have other media and processes as necessary.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 and 2 are cross-sectional views showing the main part of the image forming body according to the embodiment of the present invention, and FIGS. 4 and 5 are cross-sectional views of the main part of the personal authentication medium according to the embodiment of the present invention. And show.

  That is, the image forming body 11 according to the embodiment shown in FIG. 1 has a film in which a peeling layer 51, a concavo-convex layer 52, a light reflection coating layer 53, and an image receiving adhesive layer 54 are sequentially laminated on one surface of a substrate 50. It is formed. Then, on the surface of the image receiving adhesive layer 54 of this film, a hologram ribbon, which will be described in detail later, is transferred by thermal head thermal transfer or the like, and a plurality of dot-like cells 49 having a small area are arranged side by side. It is formed. Further, on the surface of the image receiving adhesive layer 54, for example, individual information 59 such as owner's character information and a face photograph is printed and provided.

  Unlike the image forming body 11 according to one embodiment shown in FIG. 1, the image forming body 12 according to another embodiment shown in FIG. 2 is configured by removing the uneven layer 52 that is a fixed OVD layer. 1, 2, 4, and 5, reference numeral 10 indicates an observer direction.

  As shown in FIG. 3, a dot-shaped cell 49 having a small area provided by the hologram ribbon has a transparent resin layer 55, a concavo-convex layer 56, a transparent coating layer 57, and an adhesive layer 58 laminated in this order on the image receiving adhesive layer 54. Composed.

  Examples of the material of the substrate 50 include plastic sheets such as polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene (PE). Although the thickness is also dependent on the use after formation, about 10-100 micrometers is preferable.

  Examples of the material of the release layer 51 include polycarbonate resin, acrylic resin, fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene resin, fluorene resin, PET, polypropylene, A thermoplastic resin such as polyethylene terephthalate resin or polyacetal resin with silicone or fluorine additives added is preferred, or one that easily peels from the substrate 50 such as fluorine acrylic resin or silicone acrylic resin is selected. You may do it.

  Examples of the uneven layer 52 include light such as polycarbonate resin, acrylic resin, fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene resin, fluorene resin, PET, and polypropylene. Thermosetting resin such as curable resin, acrylonitrile styrene copolymer resin, phenol resin, melamine resin, urea resin, alkyd resin, or thermoplastic resin such as propylene resin, polyethylene terephthalate resin, polyacetal resin, etc. It is formed by shaping desired irregularities. All cured products of these resins are light transmissive, and the refractive index is generally about 1.5.

  As the material of the light reflection coating layer 53, a dielectric layer, a dielectric multilayer film, or a high refractive index material which is transparent and has a refractive index different from that of the uneven layer 52 is used. For example, ZnS, TiO2, PbTiO2, ZrO, ZnTe, PbCrO4 having a refractive index of 2.0 or more is preferable. This is because the visual effect of the diffracted light by the concavo-convex layer 52 is weakened if the refractive index difference with the concavo-convex layer 52 is small. Specifically, the refractive index difference is preferably at least 0.5 or more. The film thickness is preferably 50 nm to 100 nm.

  In addition, design properties may be emphasized by partially providing a light-reflective metal deposition film such as aluminum, chromium, zinc, gold, silver, platinum, or nickel. However, in that case, it is a condition that character information such as a name and date of birth written on the personal authentication medium is not concealed. When the light-reflective coating layer 53 follows and covers the uneven surface of the uneven layer 52, it becomes a fixed OVD layer.

  As the image receiving adhesive layer 54, a thermoplastic resin such as propylene resin, polyethylene terephthalate resin, polyacetal resin, polyester resin, or the like is used. There is no particular limitation as long as it has the above-mentioned transparent coating material, other adhesive strength, and printability. The film thickness is not particularly limited, but is preferably about 5.0 to 10.0 μm. These resins are used to write information related to personal authentication, such as facial photographs, character information such as names, dates of birth, etc., using color ribbons, and at the same time support the subject that constitutes the substrate to be transferred. It is desirable to have a function as an adhesive that closely adheres when thermally transferred onto the body.

  The personal authentication medium 13 according to an embodiment of the present invention shown in FIG. 4 is formed by using the image forming body 11 as a transfer medium, performing thermal transfer to the transfer base material 60, and peeling only the base material 50. . Further, the personal authentication medium 14 according to another embodiment shown in FIG. 5 is formed by using the image forming body 12 as a transfer medium, performing thermal transfer to the transfer target substrate 60, and peeling only the substrate 50. Is done.

  Next, the configuration of the hologram ribbon used in the present invention will be described. The configuration of the hologram ribbon used in the present invention is a film in which a base material, a release layer 51 (transparent resin layer 55), an uneven layer 56, a transparent coating layer 57, and an adhesive layer 58 are laminated in this order (see FIG. 3). . The hologram ribbon has a function of peeling off from the substrate after being bonded onto the image receiving adhesive layer 54 of the transparent intermediate foil by thermal transfer.

  The release layer corresponds to the transparent resin layer 55 shown in FIG. 3 and is originally used as a release layer of the hologram ribbon, and therefore, a material having performance close to that of the release layer 51 is basically used. Further, since the transparent resin layer 55 is transferred onto the transferred substrate 60 together with the image receiving adhesive layer 54 for forming a personal authentication medium, it is preferable that the transparent resin layer 55 also has adhesiveness with the transferred substrate 60. If the adhesiveness is not present, it may be adhered to the transfer substrate 60 via a separate adhesive ribbon or the like.

  As a specific material, an acrylic resin that generally exhibits adhesion with other materials is preferable.

  The material of the uneven layer 56 is basically the same as that of the uneven layer 52.

  As the material of the transparent coating layer 57, the transparent high refractive index material mentioned in the light reflecting coating layer 53 is used. The film thickness is the same. In this embodiment, the transparent coating layer 57 follows and coats the concave and convex surface of the concave and convex layer 56 to form a transparent OVD layer. However, instead of the transparent coating layer 57, light reflective properties such as aluminum, nickel and silver are used. A metal coating layer may be provided.

  The adhesive layer 58 is preferably made of a material that improves adhesion to the image receiving adhesive layer 54. For example, a general-purpose adhesive such as a mixed material of an ester resin and an epoxy resin is preferable.

  Further, since the image forming body to which the hologram ribbon is transferred is further thermally transferred onto the transfer substrate 60, the function required for the hologram is only the heat at the time of transfer onto the image forming body 11 (12). In addition, heat resistance that can sufficiently withstand the heat at the time of transfer onto the substrate 50 is mentioned. Further, in order to express a smooth and high-definition image with the hologram ribbon, it must be thermally transferred with very fine dots, so that a good foil sharpness is required when peeling from the substrate 50. The material used for each layer is not further limited as long as it satisfies these performances and is of the type described above. In addition, the thickness of each of the release layer 51 (transparent resin layer 55), the uneven layer 56, and the adhesive layer 58 is preferably about 0.5 to 1.0 μm. When it is 0.5 μm or less, it becomes difficult to perform the function as each layer, and when it is 1.0 μm or more, the foil cutting property is deteriorated.

  Here, a method for forming a face image by thermal transfer of a hologram ribbon will be briefly described. For example, full three-color RGB full color image data displayed on a personal computer monitor is input on a computer program, and the image data is decomposed into RGB. Each data is output to a program of a thermal transfer device such as a thermal head and transferred onto the image receiving adhesive layer 54 of the intermediate foil according to the data corresponding to each color using three types of RGB hologram ribbons prepared in advance. As a result, a full-color face image hologram as if a photograph was emitted as it was was completed by RGB hologram diffraction light.

  Note that the RGB hologram uses a diffraction grating pattern designed to emit RGB diffracted light at specific angles.

  The dot size at the time of transfer of the hologram transfer medium in the present invention is not particularly limited, but when forming a personal face image or the like, the length of one side of the dot is about 0.084 mm (300 dpi). Is preferable. If the dot size is larger than this, the face image becomes rough, and it may be difficult to determine authenticity as compared to an actual face photograph. If the dot size is smaller than this, the foil cutting property of the hologram ribbon and the variation at the time of transfer become large, and it becomes difficult to express smoothly.

  In addition, when a hologram ribbon dot cell formed on the intermediate foil by transfer is partially overlapped, the original dot length is 0.084 mm square and the resolution at 300 dpi is pseudo 0.084 mm. A high-resolution image corresponding to a size of 0.042 mm or 0.042 mm × 0.042 mm, that is, 600 dpi can be obtained.

  Furthermore, in the present invention, a smoother image can be obtained by expressing the gradation by controlling the luminance of the hologram by further applying an external stimulus. For example, a method of reducing the luminance of the hologram by applying hot pressure can be used. The degree of decrease in luminance can be controlled by changing the intensity of hot pressure.

  Since the image forming body 11 (12) is positioned on the outermost surface of the personal authentication medium 13 (14) after being transferred to the substrate 50, a hologram image in which the individual information 59 is patterned or a printed fine pattern In order to improve the visibility of the pattern, it is desirable to be transparent. However, in this embodiment, in order to improve the security, the case where a fixed OVD layer is provided as a hologram layer of a transparent fixed pattern design as shown in FIG. Are listed. Moreover, it is also possible to color in the visible range. Furthermore, it is possible to provide an opaque reflective layer represented by any one or combination of halftone dots, lines, and figures on a part of the intermediate foil, but a hologram pattern having individual information displayed below The printed fine pattern is concealed.

  Hereinafter, the case where the personal authentication medium 13 shown in FIG. 4 is produced from the image forming body 11 shown in FIG. 1 will be specifically described as an example based on the embodiment of the present invention.

  First, the image forming body 11 was prepared. A polyethylene terephthalate film having a thickness of 25 μm was used as the substrate 50, and printing was performed with a gravure coater in the order of the release layer 51 and the uneven layer 52. After drying in the oven, the release layer 51 had a thickness of 0.6 μm, and the hologram forming layer had a thickness of 0.7 μm.

  This film was hot-pressed with a roll embossing device using a fixed pattern hologram plate to form a fixed pattern hologram on the concavo-convex layer. ZnS vapor deposition was performed on the fixed design hologram forming layer to provide a transparent resin layer 55. The film thickness of ZnS vapor deposition was 80 nm. The image receiving adhesive layer 54 was printed on the vapor deposition layer surface of this film. A gravure coater was used in the same manner as described above, and the film thickness was 0.6 μm.

  An intermediate foil was obtained as described above.

  Next, a hologram ribbon was created. A polyethylene terephthalate film having a thickness of 12 μm was used as the substrate 50, and printing was performed with a gravure coater in the order of the release layer 51 and the uneven layer 52. After drying in the oven, the release layer 51 had a thickness of 0.6 μm, and the uneven layer 52 had a thickness of 0.7 μm.

  This film is made up of three types of diffraction gratings having a spatial frequency of 1140 mm (designed to produce R diffracted light), a spatial frequency of 1310 mm (designed to produce G diffracted light), and a spatial frequency of 1540 mm (designed to produce B diffracted light). A solid pattern hologram was formed by performing hot pressing with a roll embossing device using plates in which the hologram solid pattern was a square of 50 mm × 50 mm and arranged in order.

  ZnS vapor deposition was performed on the hologram forming layer to provide a transparent resin layer 55. The film thickness of ZnS vapor deposition was 80 nm. The adhesive layer 58 was printed on this film with a gravure coater. The film thickness of the adhesive layer 58 was 0.6 μm.

  The above film was slit into a transfer ribbon size width and divided into small portions, and the films were joined together so as to repeat R, G, B, R, G, and B, thereby producing a hologram ribbon. Then, using a thermal head, the hologram ribbon was transferred to the target position on the image receiving adhesive layer 54 of the intermediate foil to form a full-color hologram face image.

  A photograph of the face of the person who is the subject is taken in advance, converted into image data made up of the dot cells 49 of the three primary colors RGB, input to a computer program, and the data is used as a program for the thermal head thermal transfer device. The image was output, and the RGB portion of the hologram ribbon was transferred to each location in the form of dots to form a face image. The resolution at this time was 300 dpi (the length of one side of one dot is 0.084 mm).

  Further, by using the thermal transfer mechanism of the thermal head, the intermediate foil on which the face image is formed is subjected to heat pressure so that the gradation of the data input on the program can be reproduced, so that the luminance of the hologram dot-like cell 49 is increased. Control and express the tone of the data.

  On the other hand, a sample as it was without applying hot pressure was prepared for comparison.

  Next, known yellow, magenta, cyan, and black ink ribbons were prepared, and similarly, a face photograph and character information were printed on the image receiving adhesive layer 54 of the image forming body to obtain an image forming body 11. Then, the image forming body 11 was transferred by adhering the information printing side and the paper surface which is the transfer base material and peeling the base material to obtain the personal authentication medium 13 of the present invention (see FIG. 6).

  As a result, in the sample of the present invention, the face image that is toned by applying heat pressure is generally smoother than the normal face image, and it is true by comparison with the face photo on the same surface. False judgment became easier.

  As described above, in the image forming body 11 and the personal authentication medium 13 according to this example, the portion of the individual information hologram is very easy to see and has a smooth and high resolution. It was also confirmed that authenticity can be easily determined by comparing face photographs with individual information holograms. For this reason, it was confirmed that the product has high security so that it is possible to easily determine whether the product is forged or counterfeit by visual inspection.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention at the stage of implementation. Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problems described in the column of problems to be solved by the invention can be solved, and the effects described in the effects of the invention can be obtained. In some cases, a configuration from which this configuration requirement is deleted can be extracted as an invention.

DESCRIPTION OF SYMBOLS 10 ... Observer direction 11 ... Image forming body 12 ... Image forming body 13 ... Personal authentication medium 14 ... Personal authentication medium 49 ... Dot cell 50 ... Base material 51 ... Peeling layer 52 ... Concavity and convexity layer 53 ... Light reflection coating layer 54 ... Image-receiving adhesive layer 55 ... Transparent resin layer 56 ... Concavity and convexity layer 57 ... Transparent coating layer 58 ... Adhesive layer 59 ... Individual information 60 ... Substrate to be transferred

Claims (11)

An image forming body used for anti-counterfeiting and personal authentication purposes,
An individual having at least one or more of a face image, fingerprint, signature, etc. that can identify a valid owner or user, issuer, creator of the individual authentication medium on at least one surface of the transparent substrate The information is displayed as an image,
And the said individual information displayed the image by making this dot-shaped cell into a component by providing several dot-shaped cells of the minute area laminated | stacked in order of the contact bonding layer, the OVD layer, and the transparent resin layer on the said transparent base material. Is,
And the said individual information is displayed by controlling at least one part of the said OVD layer arbitrarily by external stimuli, The image forming body characterized by the above-mentioned.   2. The image according to claim 1, wherein the transparent OVD layer includes a transparent resin layer that forms fine irregularities in a hologram or diffraction grating shape, and a transparent coating layer provided so as to cover the fine irregularities. Formed body.   The said transparent OVD layer has the transparent resin layer which forms a hologram or a diffraction grating-like fine unevenness | corrugation, and the metal coating layer provided so that this fine unevenness | corrugation surface might be covered. Image forming body.   The at least part of the OVD layer is whitened by applying a thermal pressure as the external stimulus, and the luminance reduction is controlled by the intensity of the thermal pressure. Image forming body.   The image formation according to claim 1, wherein at least a part of the OVD layer is discolored by irradiating with radiation as the external stimulus, and brightness reduction is controlled by the intensity of the radiation. body.   On the surface on the side where the individual information is displayed, an individual information printing layer which is the same as the individual information and is displayed with color ink (including white and black) and character information is displayed. The image forming body according to claim 1, wherein the image forming body is provided.   The image forming body according to claim 6, wherein an area of an image displayed on the individual information printing layer is 0.1 to 30 times as large as an area of the individual information.   The image according to any one of claims 1 to 7, wherein a fixed OVD layer for displaying a fixed design that is not related to the individual information by forming a hologram or diffraction grating-like fine irregularities is provided in part. Formed body.   9. A personal authentication medium, wherein the image forming body according to claim 1 is transferred to a substrate to be transferred.   The personal authentication medium according to claim 9, wherein a fine pattern is printed on the surface of the substrate to be transferred. A manufacturing method for manufacturing the personal authentication medium according to claim 9 or 10,
By forming the dot-shaped cells with a small area on a transparent intermediate foil by thermal head thermal transfer and overlapping the dot-shaped cells at least partially, an image forming body is formed as an image using the dot-shaped cells as a component. Then, it is formed by thermal transfer onto one surface of the substrate to be transferred.

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