WO2000077765A1

WO2000077765A1 - Identification sheet, identification card and method of identification

Info

Publication number: WO2000077765A1
Application number: PCT/JP2000/003749
Authority: WO
Inventors: Ryuzo Kato; Tsuneo Numata
Original assignee: Ryuzo Kato; Tsuneo Numata
Priority date: 1999-06-11
Filing date: 2000-06-09
Publication date: 2000-12-21

Abstract

An identification sheet (502) attached to an identification card includes a first area (A1) where a first identification pattern (506) of a first optical interference characteristic is formed and a second area (B1) where a second identification pattern (508) of a second optical interference characteristic is formed. When the identification sheet (502) is laid on a detection sheet (510) having a detection pattern (514), an interference pattern having a first interference characteristic is produced by the first identification pattern (506) and the detection pattern (514).

Description

Description Identification sheet, identification card and identification method

The present invention relates to an identification sheet, an identification card, and an identification method used for discriminating forgery and the like. Background art

In the commerce market, printed materials such as securities, passports, gift certificates, etc. are treated in the same manner as money. In addition, seals such as brand seals can be used to prove authentic products. Further, as proof of identity, there are, for example, certificates such as passports and driver's licenses. These printed materials, stickers, and certificates are easily subject to counterfeiting, and the circulation of counterfeit items disrupts social order.

Therefore, for example, the following measures have been taken to prevent such forgery.

(1) Elaborate printing (eg, use smaller designs, use more colors) so that they cannot be easily duplicated.

(2) Special printing (for example, hologram printing, printing using ultraviolet light-emitting ink) is performed so that only those that have special printing technology (advanced technology, expensive equipment) can be used.

(3) Use a special paper (for example, a watermark) on the paper to be printed to make duplication difficult.

(4) Use a special seal that is not normally available, so that when this seal is peeled off, it can be easily identified that the seal has been peeled off.

(5) Combine two or more of the above (1) to (4).

However, countermeasures described above make forgery difficult, but once counterfeited, it is not easy to distinguish between a genuine article and a counterfeit one (fake one). An object of the present invention is to provide an identification sheet, an identification card, and an identification method that are difficult to forge and that can easily distinguish a genuine article from a fake article. Disclosure of the invention

The present invention is directed to an identification sheet using a sheet-like body directly provided with a fine identification pattern, and superposing sheet-like members having the same fine identification pattern to generate interference fringes. is there.

Further, the present invention provides an identification method using a sheet-shaped main body directly provided with a fine identification pattern, stacking sheet-like members having the same fine identification pattern, and identifying based on generated interference fringes. is there.

According to the identification sheet and the identification method of the present invention, the fine identification pattern is provided directly on the sheet-shaped main body. When a sheet-like member having a similar fine identification pattern is superimposed on this sheet-like body, interference fringes are generated, and it is easy to distinguish between a genuine article and a fake article based on whether or not the interference fringes occur. Can be.

Further, the present invention uses a sheet-shaped main body provided with a fine identification pattern on the surface of a transparent or translucent base portion, and generates interference fringes by overlapping sheet-shaped members having the same fine identification pattern. This is the identification sheet.

Further, the present invention uses a sheet-shaped body having a fine or distinctive pattern provided on the surface of a transparent or translucent base portion, and superimposes a sheet-like member having the same fine or distinctive pattern to generate interference fringes. This is an identification method that is identified by:

According to the identification sheet and the identification method of the present invention, a fine identification pattern is provided on the surface of the transparent or translucent base portion. When a sheet-like member having a similar fine discrimination pattern is superimposed on the sheet-like body, interference fringes are generated. Depending on whether or not the interference fringes are generated, it is possible to easily discriminate a genuine article from a fake article. it can.

Further, the present invention is an identification sheet in which interference fringes are generated by a sheet-like main body provided with a fine identification pattern on both surfaces of a transparent or translucent base portion. According to the identification sheet of the present invention, a fine identification pattern is provided on both surfaces of the transparent or translucent base portion. In this sheet-like body, interference fringes are generated by itself, and it can be easily distinguished from genuine or fake by the presence or absence of the interference fringes. You.

Further, the present invention provides a sheet-shaped main body having a fine identification pattern, a first resin sheet having a high melting point is provided on both surfaces of the sheet-shaped main body, and a melting point is provided on a surface of the first resin sheet. Arranges a second resin sheet lower than the first resin sheet, and attaches the first and second resin sheets to both surfaces of the sheet-like body by melting the second resin sheet. This is the identification sheet.

According to the identification sheet of the present invention, since both surfaces of the sheet-like body having the fine pattern are covered with the first and second resin sheets, the sheet-like body can be protected by these resin sheets. . In addition, since the first resin sheet having a high melting point is provided on both surfaces of the sheet-shaped body, the first resin sheet is melted at the time of fusion bonding, so that the space between the fine identification patterns of the sheet-shaped body is reduced. It is possible to prevent the interference fringes from flowing into the device, thereby preventing the interference fringes from being blurred.

Further, the present invention is an identification method in which the sheet-shaped main body and the sheet-shaped member are overlapped to form an identification sheet, and the identification sheet is attached to an article.

According to the identification method of the present invention, an identification sheet is formed by overlapping a sheet-shaped main body and a sheet-shaped member superposed thereon, and this identification sheet is attached to an article, so that interference fringes due to the identification sheet are generated. By checking whether or not the article is genuine or fake, it is easy to determine whether the article is genuine or fake.

In addition, the present invention provides an identification sheet using either one of the sheet-shaped main body and the sheet-shaped member, a detection sheet using the other, and attaching the identification sheet to an article. This is an identification method in which the detection sheet and the identification sheet are superimposed upon matching.

According to the identification method of the present invention, one of the sheet-shaped main body and the sheet-shaped member constitutes an identification sheet, and the other constitutes a detection sheet, and the identification sheet is attached to an article. At the time of identification and collation, the detection sheet and the identification sheet are overlapped. When a predetermined interference fringe is generated by the superposition, the identification sheet attached to the article is genuine, in other words, the article can be determined to be genuine, and the identification sheet and the detection sheet are overlapped. Can identify genuine and fake products. Further, the present invention is an identification card having an identification sheet that generates an interference fringe by using transmitted light or reflected light over a detection sheet having a detection pattern, wherein the identification sheet includes a first light A first region in which a first identification pattern having interference characteristics is formed, and a second nod region in which a second identification pattern having second light interference characteristics is formed, wherein the first identification pattern is provided. The first light interference characteristic of the second identification pattern and the second light interference characteristic of the second identification pattern are different from each other;

The detection sheet superimposed on the identification sheet has a detection pattern, and when the identification sheet and the detection sheet are superimposed, the first identification pattern or the second identification pattern and the detection pattern are overlapped. An identification card in which an interference fringe of the first light interference characteristic or the second light interference characteristic is generated depending on a pattern.

Further, the present invention uses an identification article having an identification sheet, and a detection force having a detection sheet, and uses the transmitted light or the reflected light by overlapping the identification sheet and the detection sheet during an identification test. An interference fringe is generated by using the generated interference fringe, and the identification method is used to identify the identification article.

The identification sheet has a first region in which a first identification pattern having a first optical interference characteristic is formed, and a second region in which a second identification pattern having a second optical interference characteristic is formed. The first light interference characteristic of the first identification pattern and the second light interference characteristic of the second identification pattern are different from each other;

The detection sheet of the detection card has a detection pattern corresponding to the first identification pattern or the second identification pattern of the identification sheet,

When the identification sheet and the detection sheet are overlaid, the first optical interference characteristic or the second optical interference is determined by the first identification pattern or the second identification pattern and the detection pattern. This is an identification method in which interference fringes having characteristics are generated.

According to the identification method and the identification method of the present invention, when the first identification pattern (or the second identification pattern) of the identification sheet is used, the identification sheet and the detection sheet are overlapped during the identification test. And the first identification pattern (or the second identification pattern) of the identification sheet and the detection pattern of the detection sheet generate interference fringes of the first optical interference characteristic (or the second optical interference characteristic), By confirming the generation of this interference fringe, the article to which the identification sheet is attached can be identified as a genuine article. Difficult identification can be performed easily and easily.

In the present invention, the detection sheet has a first detection pattern and a second detection pattern, and when the identification sheet and the detection sheet are overlapped, the first sheet of the identification sheet An interference fringe of the first light interference characteristic is generated by the identification pattern and the first detection pattern of the detection sheet, and the second identification pattern of the identification sheet and the first detection pattern of the detection sheet. This is an identification card in which an interference fringe of the second light interference characteristic is generated by the second detection pattern.

Further, in the present invention, the detection sheet includes a first detection pattern corresponding to the first identification pattern of the identification sheet and a second detection pattern corresponding to the second identification pattern of the identification sheet. When the identification sheet and the detection sheet are overlapped with each other, the first light from the first identification pattern on the identification sheet and the first detection pattern on the detection sheet are An interference fringe having interference characteristics is generated, and the second fringe having light interference characteristics is generated by the second identification pattern of the identification sheet and the second detection pattern of the detection sheet. This is the identification method used.

According to the identification card and the identification method of the present invention, the first identification pattern and the second identification pattern of the identification sheet are used, and the first identification pattern of the identification sheet and the first identification pattern of the detection sheet are used during the identification test. When the inspection pattern is overlapped with the first inspection pattern, the first identification pattern on the identification sheet and the first detection pattern on the detection sheet generate interference fringes of the first optical interference characteristic, and the second identification pattern on the identification sheet. When the second identification pattern of the identification sheet and the second inspection pattern of the detection sheet are overlapped with each other, the interference pattern of the second optical interference characteristic is obtained by the second identification pattern of the identification sheet and the second detection pattern of the detection sheet. Is generated. Therefore, by confirming the generation of the first interference fringe and the second interference fringe, it is possible to identify that the article to which the identification sheet is attached is genuine, and to simplify the more difficult identification of forgery. And easily.

Further, the present invention is the identification card in which the first identification pattern and the second identification pattern of the identification sheet have different pattern shapes. According to the identification card of the present invention, the shapes of the first identification pattern and the second identification pattern of the identification sheet are different from each other. For example, the detection sheet If so, if the detection pattern corresponds to the first identification pattern (or the second identification pattern), the interference having the first optical interference characteristic (or the second optical interference characteristic) A fringe is generated, and by the generation of the interference fringe, it is possible to determine whether or not the image is genuine. Further, when the detection sheet has the first detection pattern and the second detection pattern, an interference fringe having the first optical interference characteristic is generated by the first identification pattern and the second detection pattern. In addition, interference fringes having second optical interference characteristics are generated by the second identification pattern and the second detection pattern, and it is possible to identify whether or not the image is genuine by generating these interference fringes. it can.

Further, the present invention is the identification card, wherein the first identification pattern of the identification sheet has a specific shape, and the second identification pattern has another shape different from the specific shape.

According to the discriminating power of the present invention, since the shapes of the first discrimination pattern and the second discrimination pattern are different, the interference fringe generated by the first discrimination pattern and the second discrimination pattern The interference fringes have different shapes, and the difference in the shape of the generated interference fringes can be used to determine whether they are genuine.

The present invention is an identification card in which the identification pattern and the second identification pattern of the identification sheet have different pattern sizes.

According to the identification card of the present invention, since the sizes of the first identification pattern and the second identification pattern are different, the interference fringes generated by the first identification pattern and the second identification pattern are different. The size of the interference fringe patterns that are different from each other is different, and the difference in the size of the generated interference fringe patterns can be used to determine whether or not the pattern is genuine.

Further, the present invention is the identification card in which the first identification pattern and the second identification pattern of the identification sheet have different thicknesses from each other.

According to the identification card of the present invention, since the first identification pattern and the second identification pattern have different thicknesses, the interference fringes generated by the first identification pattern and the interference generated by the second identification pattern. The brightness of the fringes (the brightness of the interference fringes) is different, and it is possible to identify whether or not the fringe is genuine by using the difference in the brightness of the generated interference fringes. Further, the present invention is the identification card in which the first identification pattern and the second identification pattern of the identification sheet are out of phase with each other in the pattern arrangement.

According to the identification card of the present invention, since the phases of the pattern arrangement of the first identification pattern and the second identification pattern are different, the phases of the first identification pattern and the detection pattern match as required. Then, an interference fringe corresponding to the first identification pattern is generated, and when the phases of the second identification pattern and the detection pattern match as required, an interference fringe corresponding to the second identification pattern is generated, By using the phase difference of the generated interference fringes, it can be determined whether or not the interference fringe is genuine.

Further, in the present invention, the first identification pattern and the second identification pattern of the identification sheet are identification forces in which the angles of the pattern arrangement are mutually shifted.

According to the identification card of the present invention, since the angles of the pattern arrangement of the first identification pattern and the second identification pattern are different, the angle between the first identification pattern and the detection pattern matches as required. Then, an interference fringe corresponding to the first identification pattern is generated, and when the angle between the second identification pattern and the detection pattern matches as required, an interference fringe corresponding to the second identification pattern is generated. It is possible to determine whether or not the image is genuine by using the angle difference of the generated interference fringes.

Further, according to the present invention, the first area and / or the second area of the identification sheet is an identification force indicating a specific shape.

According to the identification card of the present invention, since the first area and the Z or the second area of the identification sheet have a specific shape, the first area corresponding to the first identification pattern and the Z or the second identification pattern. It is easy to determine whether the product is genuine or not depending on whether or not the interference fringes of the light interference characteristic and Z or the second light interference characteristic are generated, and whether or not the generated interference fringe has a specific shape. Can be identified. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional view schematically showing a first embodiment of an identification sheet according to the present invention (an identification sheet to which the identification method according to the present invention is applied). FIG. FIG. 3 is an exploded perspective view showing a part of the sheet, FIG. 3 is a front view schematically showing an example in which the identification sheet of FIG. 1 is applied, and FIG. 4 is an example in which the identification sheet is applied. FIG. 5 is a partially enlarged sectional view showing another example in an enlarged manner. FIG. 5 is a sectional view schematically showing a second embodiment of the identification sheet according to the present invention, and FIG. 6 is a sectional view according to the present invention. FIG. 7 is a cross-sectional view schematically showing a third embodiment of the identification sheet. FIG. 7 is a perspective view schematically showing an example in which the fourth embodiment of the identification sheet according to the present invention is applied. FIG. 8 is a diagram showing a state of interference fringes generated by an experiment, and FIG. 9 is a diagram showing a first embodiment of an identification card according to the present invention (an identification card to which the identification method according to the present invention is applied). FIG. 10 is a perspective view schematically showing a detection card and a detection card. FIG. 11 is an enlarged cross-sectional view showing the unit and the vicinity thereof. FIG. 11 is an enlarged and simplified view of the identification unit of the identification card and the detection unit of the detection card shown in FIG. FIG. 12 is a front view showing a second embodiment of the discriminating force and detection card according to the present invention in an enlarged and simplified manner, and FIG. 13 is a front view showing the present invention. FIG. 14 is an enlarged front view showing a third embodiment of the identification card and the detection card according to the present invention. FIG. 14 is an enlarged view of the fourth embodiment of the identification card and the detection card according to the present invention. FIG. 15 is an enlarged and simplified front view of a fifth embodiment of an identification card and a detection card according to the present invention, and FIG. Sixth embodiment of identification card and detection card according to the present invention FIG. 17 is an enlarged and simplified front view, and FIG. 17 is an enlarged and simplified front view of a seventh embodiment of an identification card and a detection card according to the present invention. FIG. 8 is a front view showing, in an enlarged and simplified manner, an eighth embodiment of the identification card and the detection card according to the present invention, and FIG. 19 shows the identification card and the detection card according to the present invention. FIG. 33 is an enlarged and simplified front view of a ninth embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an identification sheet, an identification card, and an identification method according to the present invention will be described with reference to the accompanying drawings.

First Embodiment of Identification Sheet The identification sheet according to the first embodiment will be described with reference to FIGS. 1 and 2. The identification sheet 2 shown in the drawing is overlapped with a sheet-shaped body 4 on one side of the sheet-shaped body 4. It is composed of sheet-like members 6. In this embodiment, the sheet-shaped member 6 is substantially the same as the sheet-shaped main body 4, and therefore, the identification sheet is formed by overlapping the two sheet-shaped main bodies 4 with each other in an appropriate positional relationship. 2 is configured.

The sheet-shaped main body 4 (sheet-shaped member 6) has a rectangular thin sheet shape, and is provided with a plurality of small square through holes 8 in a mesh shape as a fine identification pattern. The thickness of such a sheet-like body 4 (sheet-like member 6) is preferably 1 Atm to 100 m, and such a sheet-like body 4 (sheet-like member 6) is preferred. By using 6), the depth of each through hole 8 becomes〗 to〗 0. Depth of through hole 8

If it is smaller than 1, the generated interference fringes will be bright and blurred, making it difficult to see. On the other hand, if the depth of the through hole 8 exceeds 100 m, the generated interference fringes will be dark and difficult to see. Each through-hole 8 is formed, for example, to a size of about 500 to 2000 mesh (the number of through-holes 8 per inch). By reducing the size of the through-hole 8, interference fringes to be described later can be obtained. Is generated, and its forgery becomes difficult.

In this embodiment, the through hole 8 is formed in a square shape, but is not limited to this, and may be a circular shape, a triangular shape, a hexagonal shape, a specific symbol (for example, a company name or a brand name), a specific pattern, or the like. For example, a hexagon, a particular symbol, or a particular pattern makes forgery more difficult. Further, in the above embodiment, the minute identification pattern is constituted by the mesh-shaped through-holes 8, but a set of the through-holes 8 may be used to indicate a specific symbol, a specific pattern, or the like. Even if configured, counterfeiting becomes more difficult.

Such sheet-like body 4 (sheet-like member 6) is used for excimer processing (processing using excimer laser light), laser processing (processing using optical energy of laser light) on a metal plate. In this case, a fine identification pattern by the through holes 8 is formed directly on the sheet-like body 4 (sheet-like member 6). Also, for example, by using an additive method (a so-called electrode method), etching, or a mask manufacturing method, the sheet-shaped main body 4 (sheet-shaped member 6) can be directly applied. A through hole 8 can be provided. In this case, nickel, chromium, copper, or the like is used as the metal material. In addition, by using the additive method, a fine fine identification pattern having a large thickness and edges can be formed, and by using such a fine identification pattern, clearer interference fringes can be generated. .

The sheet-shaped main body 4 and the sheet-shaped member 6 are superimposed on each other in an appropriate positional relationship (a positional relationship at which interference fringes described later occur), and as shown in FIG. The first resin sheet 10 is further provided with a second resin sheet 12 on the surface of the first resin sheet 10. The first resin sheet 10 is formed of a heat-resistant transparent or translucent synthetic resin having a high melting point, for example, polypropylene, and the second resin sheet 12 has a transparent or lower melting point lower than that of the first resin sheet 10. It is formed from a translucent synthetic resin, for example, polyethylene. In this embodiment, the first resin sheet 10 has substantially the same size as the sheet-shaped main body 4 and the sheet-shaped member 6, and covers the surfaces of the sheet-shaped main body 4 and the sheet-shaped member 6. The second resin sheet 12 is larger than the sheet-shaped main body 4 and the sheet-shaped member 6, and its peripheral portion projects outward from the sheet-shaped main body 4 and the sheet-shaped member 6 in all directions. The thickness of the first resin sheet 100 is, for example, about 10 to 100 tm, and the thickness of the second resin sheet 12 is, for example, about 10 to 100 m.

After the identification sheet 2 covers the first resin sheet 10 on the surfaces of the sheet-like main body 4 and the sheet-like member 6 which are overlapped with each other, and further covers the second resin sheet 12, 2 Formed by heating and pressing from the surface of the resin sheet 12. The heating is set to a temperature range in which the second resin sheet 12 is melted but the first resin sheet 10 is not melted. By heating and pressurizing in this manner, the peripheral portions of the second resin sheet 12 are melt-bonded to each other at the peripheral portion thereof, and the lower peripheral portion of the second resin sheet 12 in the central region thereof. The identification sheet 2 which is melt-bonded to the first resin sheet 10 and covered with the first and second resin sheets 10 and 12 is formed. By covering with the resin sheets 10 and 12 in this way, the strength of the identification sheet 2 itself can be increased and the sheet-shaped main body 4 and the sheet-shaped member 6 can be prevented from being damaged. In addition, since the first resin sheet 10 is interposed between the sheet-shaped main body 4 and the sheet-shaped member 6 and the second resin sheet 12 to be melted, a part of the second resin sheet 12 is melted. Is a sheet-shaped body 4 and It can be prevented from dissolving into the through-hole 8 of the sheet-like member 6, and thereby blurring of the interference fringes generated thereby can be prevented.

As shown in FIG. 3, such an identification sheet 2 is attached to securities 20, such as stock certificates and government bonds. The securities 20 are provided with a sheet-like certificate body 22 formed of paper or the like. The securities body 22 has a rectangular opening corresponding to the size of the identification sheet 2. The outer peripheral edge of the identification sheet 2 is attached to the inner peripheral edge of the disc using an adhesive or the like. In the securities 20, when the identification sheet 2 is seen through, the light passing through the identification sheet 2 causes an interference fringe pattern corresponding to the formed fine identification pattern to appear. For example, when the fine identification pattern is a mesh pattern, a mesh interference fringe pattern appears, and a predetermined interference fringe (so-called fringe fringe) appears, whereby the identification sheet 2 is genuine. The security 20 with the sheet 2 can be identified as genuine.

In the identification sheet 2 of the first embodiment, the identification sheet 2 is provided by disposing first and second resin sheets 10 and 12 on the surfaces of the sheet-shaped main body 4 and the sheet-shaped member 6. However, the identification sheet 2A may be constituted by the sheet-shaped main body 4 and the sheet-shaped member 6, and these may be attached to the securities 20A as shown in FIG.

Referring to FIG. 4, in this embodiment, a rectangular opening is formed at a predetermined position of securities body 22A of securities 20A, and sheet-like body 4 and a sheet-like body are formed in the rectangular opening. The seat-shaped member 6 is accommodated, and the first resin sheet 1 OA is disposed on the surfaces of the sheet-shaped main body 4 and the sheet-shaped member 6. Each first resin sheet 10A has the same size as the sheet-shaped body 4 and the sheet-shaped member 6, and is accommodated in the opening of the securities body 22A as shown in FIG. Stipulates that the front and back sides of the securities body 22 A are substantially the same. The second resin sheet 12A is provided so as to cover substantially the entire front and back surfaces of the security body 22A. By attaching in this manner, the strength of the identification sheet 2A can be increased, and the securities 2OA itself can be protected by the second resin sheet 12A.

In each of the embodiments shown in FIGS. 1 to 4, the sheet-shaped main body 4 is disposed on the lower side, and the sheet-shaped member 6 is disposed on the upper side of the sheet-shaped main body 4. On the contrary, the sheet-like member 6 is arranged on the lower side, and the sheet-like body 4 is arranged on the upper side. It may be.

Second embodiment of identification sheet

Referring to FIG. 5, a description will be given of a second embodiment of the identification sheet. The identification sheet 102 shown in FIG. 5 includes a sheet-like body 104 and this sheet-like body 104. It is composed of sheet-like members 106 which are superposed. Also in this embodiment, the sheet-like member 106 is substantially the same as the sheet-like main body 104, and therefore, the two sheet-like main bodies 104 have an appropriate positional relationship with each other. The identification sheet 102 is constructed by superimposing the information on the identification sheet.

The sheet-shaped body 104 (sheet-shaped member 106) is a thin sheet having a rectangular shape, like the first embodiment, and is a transparent or translucent material, for example, a synthetic resin material such as polypropylene, glass, or the like. The base portion 108 has a plurality of, for example, square patterns 110 as a fine identification pattern provided in a mesh on the surface of the base portion 108. In such a sheet-like body 104 (sheet-like member 106), the thickness of the base portion 108 is about 100 to 100 ^ m, and the thickness of the pattern 110 is 1 Atm. Preferably, the thickness is 100 tm. By forming the pattern 110 having such a thickness, the generated interference fringes become clear. Note that the identification pattern 110 is formed in a size of about 500 to 2000 mesh (the number of openings per inch) as in the first embodiment.

In this embodiment, the pattern of the identification pattern 110 is formed in a square shape, but is not limited thereto, and may be a circle, a triangle, a hexagon, a specific symbol (eg, a company name or a brand name), a specific pattern, or the like. May be formed into an appropriate shape.

In such a sheet-shaped main body 104 (sheet-shaped member 106), the identification pattern 110 can be provided on the surface of the base portion 108 by using, for example, a sputtering method.

As shown in FIG. 5, the sheet-shaped main body 104 and the sheet-shaped member 106 have an appropriate positional relationship so that their identification patterns 108 are in contact with each other (an interference fringe described later occurs). (Positional relationship). Then, a protective sheet 112 is provided on the surface of the base portion 108. The protective sheet 112 is a transparent or translucent resin having a lower melting point than the sheet body 104 and the base portion 108 of the sheet member 106, for example. For example, it is formed from polyethylene. In this embodiment, as can be easily understood, the base portion 108 functions in the same manner as the first resin sheet 10 in the first embodiment, and the protection sheet 112 is the second resin sheet in the first embodiment. 2 Functions equivalent to resin sheet 12.

As shown in FIG. 5, the identification sheet 102 covered the protection sheet 112 on the surface of the sheet-like body 104 and the sheet-like member 106 which were overlapped with each other. Thereafter, the protective sheet is formed by heating and pressing from the surface of the protective sheet. The heating is set to a temperature range in which the protective sheet 12 is melted, but the sheet-shaped body 104 and the base portion 108 of the sheet-shaped member 106 are not melted. By heating and pressurizing in this way, the peripheral edges of the protective sheet 112 are fused to each other at the peripheral edge thereof, and the lower base is located in the central region thereof. The identification sheet 102 which is melt-bonded to the part 108 and thus covered with the protective sheet 112 is formed. By doing so, also in the second embodiment, the strength of the identification sheet 102 itself can be increased, and a part of the melted protection sheet 112 can be formed into a sheet-like body 104 and It is possible to prevent the sheet-like member 106 from melting into the identification pattern 110. In addition, since the fine identification pattern 110 is formed on the surface of the base portion 108, the strength of the sheet-like body 104 and the sheet-like member 106 themselves increases, and handling of these also becomes difficult. It will be easier.

This identification sheet 102 is also attached and attached to securities such as stock certificates and government bonds in the same manner as described above, instead of the identification sheet 2 (2A) shown in FIGS. 1 to 4. When the identification sheet 102 is seen through, the light passing through the identification sheet 2A causes a pattern of interference fringes corresponding to the formed fine identification pattern 110 to appear, and a predetermined interference fringe appears. This makes it possible to identify that the identification sheet is genuine.

In the second embodiment, the sheet-shaped main body 104 and the sheet-shaped member 106 are substantially the same, but as the sheet-shaped member 106, for example, FIGS. Using the sheet-shaped member 6 shown in the figure, the sheet-shaped body 104 having the identification pattern 110 provided on the base portion 108 and the sheet-shaped member 6 having the through hole 8 formed directly are combined. The sheet-shaped main body 104 may be formed as shown in FIGS. 1 and 2, for example. Using the sheet-shaped main body 4 shown, a sheet-shaped main body in which a through-hole 8 is directly formed and a sheet-shaped member 106 in which an identification pattern 110 is provided on a base portion 108. You may do so.

In the first and second embodiments, the sheet-shaped main body 4 (104) and the sheet-shaped member 6 (106) are stacked one by one. However, the present invention is not limited to this. One or more appropriate number of sheet-like bodies 4 (104) may be overlapped with one or more appropriate number of sheet-like members 6 (106). An interference fringe is generated even if the pattern is formed.

Third Embodiment of Identification Sheet

With reference to FIG. 6, a third embodiment of the identification sheet will be described. The identification sheet 202 is composed of a sheet-like main body 204. As in the first embodiment, the sheet-shaped main body 204 is in the form of a rectangular thin sheet, and is made of a transparent or translucent material, for example, a synthetic resin material such as polypropylene, or a base made of glass or the like. A plurality of square-shaped patterns 208 are provided in a mesh shape on both surfaces of the base portion 206 as fine identification patterns. The base portion 206 and the identification pattern 208 in the sheet-like main body 204 are formed similarly to the second embodiment. Such a sheet-like body 204 can be formed, for example, by using a sputtering method.

In the third embodiment, since the identification patterns 208 are provided on both surfaces of the base portion 206, interference fringes are generated by using one sheet-shaped main body 204. A first resin sheet 210 is disposed on both surfaces of the sheet-like body 204, that is, on the surface of each identification pattern 208, and a second resin sheet 2 is provided on the surface of the first resin sheet 210. 〗 2 are installed. The first and second resin sheets 210 and 212 may be the same as those of the first embodiment, and cover both surfaces of the sheet-like body 204 in the same manner as described above.

This identification sheet 202 is also attached to securities such as stock certificates and government bonds in the same manner as described above, instead of the above-mentioned identification sheet 2 (102), and the attached identification sheet 102 is attached. When seeing through No. 2, an interference fringe pattern corresponding to the formed fine identification pattern 110 appears, and a predetermined interference fringe makes the identification sheet real. It can be identified as an object. In the third embodiment, since the identification patterns 208 are provided on both sides of the base portion 206, there is no need to overlap them, and handling as an identification sheet becomes easy.

In each of the above embodiments, the identification sheet 2 (2A, 102, 202) is applied to the securities 22 (2OA). However, the present invention is not limited to this. The identification sheet can be widely applied to checks, travel checks, stock certificates, bonds, gift certificates, tickets, boarding passes, cash cards, IC cards, passports, various brand seals, quality assurances, and other items. By using these, even laymen can easily identify whether they are real or fake.

Fourth embodiment of identification sheet

In the embodiment described above, the interference fringes are generated by the identification sheet 2 (2A, 102, 202) itself. For example, the interference fringes are generated as shown in FIG. It is also possible to make a distinction between a fake and a fake.

Referring to FIG. 7, a fourth embodiment of the identification sheet will be described. For example, the identification sheet 304 is applied to an article 302 such as a securities or a brand seal. The identification sheet 304 is composed of, for example, the sheet-shaped main body 4 (or the sheet-shaped member 6) in the first embodiment, and for example, both surfaces thereof are the first and second resin sheets 10 and 10 in the first embodiment. Covered by one and two. A rectangular opening is formed in the article body 302 of the article 302, and the identification sheet 304 is attached to the opening. Incidentally, the identification sheet 304 may be constituted by the sheet-shaped main body 104 (or the sheet-shaped member 106) in the second embodiment.

This identification sheet 304 is used in combination with a detection sheet 304 that is superimposed on the identification sheet at the time of collation. In this embodiment, the detection sheet 308 is applied to the detection card 310. The detection card 310 includes a rectangular sheet-shaped card main body 312, and a detection sheet 308 is attached to a rectangular opening formed in the card main body 312. The detection sheet 308 is used to generate interference fringes in combination with the identification sheet 304 attached to the article body 304, and for example, the sheet-like member 6 ( Alternatively, the first and second resin sheets 10 and 12 of the first embodiment are covered on both sides thereof, for example. In addition, detection The sheet 308 may be constituted by the sheet-like member 106 (or the sheet-like main body 104) in the second embodiment.

In such a form, the identification sheet 304 is attached to the article 302 side, and the detection sheet 308, that is, the detection card 310, checks whether the article 302 is genuine or fake. Controlled by the identification inspector. And when identifying the article 302, the article

The identification sheet 304 of the 302 side and the detection sheet 310 of the detection card 310 are superimposed on each other. In this way, light passing through the identification sheet 304 and the detection sheet 308 causes interference fringes corresponding to the patterns of the sheets 304 and 308, and the identification is made by the generated interference fringes. Sheet 3 0 4, in other words the article 3 0 with this

An amateur can easily identify whether 2 is genuine. Also, the brightness of the generated interference fringes, the sharpness of the interference fringes, etc. are unknown from the identification sheet 304 on the article 302 side, and can only be found in combination with the inspection sheet 310. Therefore, card 3

By making the identification inspector manage 10, it becomes difficult to forge the identification sheet 304, and it can be provided as a more secure and reliable identification method.

In the fourth embodiment, the inspection sheet 3 08 is applied to the inspection card 3 10. However, for example, an identification inspection device may be manufactured, and the inspection sheet 3 08 may be incorporated in the identification inspection device. Good. In such a case, the management of the inspection sheet 308 is further facilitated, and a more secure and reliable identification method is provided.

A confirmation experiment was performed to confirm the occurrence of interference fringes. The same sheet-like body and sheet-like member were manufactured by the additive method (electrode method) using copper. The through-holes of the manufactured sheet-shaped main body and sheet-shaped member had a square shape of 1000 mesh, and their thickness was 3 tm. When the sheet-shaped main body and the sheet-shaped member were overlapped with each other, interference fringes were generated as shown in FIG. The circular area A in FIG. 8 is the sheet-shaped main body, the circular area B is the sheet-shaped member, and the area C where the area A and the area B overlap is the sheet-shaped main body and the sheet-shaped member. In the overlapping portion between the sheet-shaped main body and the sheet-shaped member, a clear interference fringe corresponding to the shape of the through hole formed in them was generated. Note that no interference fringes were generated even when the sheet-shaped main body and the sheet-shaped member having through holes of different meshes were overlapped. From these facts, it is necessary to determine whether or not interference fringes occur. It was confirmed that it was possible to identify whether the body was a predetermined one or not.

First Embodiment of Identification Card

A first embodiment of the identification card will be described with reference to FIGS. 9 to 11. The illustrated identification card 404 uses a detection card 406 to determine whether or not it is genuine. An identification test is performed. The discriminating force 404 as an identification article is provided with a card body 408 as a rectangular article body, a rectangular opening is formed in the card body 8, and an identification sheet is provided in the opening. 402 is installed. The attachment of the identification sheet 402 will be described later. In the present specification, this identification card 404 is used in addition to various cards such as a cash card, an IC card, a boarding pass, and a boarding pass, as well as banknotes, checks, travel checks, stock certificates, bonds, gift certificates, and various types of cards. It is used for concepts such as brand seals, quality assurances, and other sheet-like items.

Referring to FIG. 11 together with FIG. 9, in the first embodiment, the identification sheet 402 includes a rectangular identification sheet main body 407, and the identification sheet main body 407 is attached to the identification sheet main body 407. Are provided with first to fourth regions A, B, C, and D which are substantially equally divided in the vertical and horizontal directions, and the first region A includes a first identification pattern 41 having a first optical interference characteristic. The first identification pattern 410 has a large number of パターン Α ”roman patterns, and the second region を has a second optical interference characteristic. The second identification pattern 4 1 2 is provided, and a large number of “ID” patterns are formed in the second identification pattern 4 1 2. C is provided with a third identification pattern 414 having a third light interference characteristic. In the fourth region D, a fourth identification pattern 4 16 having a fourth optical interference characteristic is applied, and the fourth identification pattern 4 16 There are a number of “HJ-shaped” patterns in which one pattern shape is a Roman character. The first to fourth identification patterns 4 10 to 4 16 applied to the first to fourth areas A to D are The identification sheet main body 407 may be formed of, for example, a metal plate, having an appropriate shape different from each other, for example, a letter, a number, a symbol, a pattern, or an appropriate combination thereof. In this case, the first to fourth identification patterns 410 to 416 of the first to fourth regions A to D are, for example, excimer processing (processing using excimer laser light), laser processing (laser light processing). Use The first to fourth identification patterns 410 to 416 can be formed directly in the metal plate with through holes. Also, for example, by using an additive method (electrode method), etching, or a mask manufacturing method, the first to fourth identification patterns 410 to 41 can be directly formed in the metal plate with through holes. 6 can be formed. In addition, by using the additive method, it is possible to form a fine fine identification pattern having a thick wall and a wedge.

The through-holes forming the first to fourth identification patterns 410 to 416 of the identification sheet body 407 are, for example, 500 to 2000 per inch in the vertical and horizontal directions. By making the through-holes small in this way, the interference fringes described below are generated as desired, and the production of the identification sheet 402 itself is not easy. Forgery becomes difficult.

The identification sheet 402 is attached to the card body 408, for example, as shown in FIG. Referring mainly to FIG. 10, an identification sheet 402 is accommodated in a rectangular opening formed in the card body 408 of the identification card 404. A first resin sheet 418 as a coating layer is provided. Each first resin sheet 410 is substantially the same size as the identification sheet 402, is accommodated in the opening of the card body 408, and the surfaces thereof are the surfaces of the force body 408. And the substantially same surface as the back surface. In this embodiment, the second resin sheet 420 as the second coating layer covers the first resin sheet 418 so as to cover substantially the entire front and back surfaces of the card body 408 in this embodiment. Is provided. The first resin sheet 418 is formed of a heat-resistant transparent or translucent synthetic resin having a high melting point, for example, polypropylene, and the second resin sheet 420 has a melting point higher than that of the first resin sheet 418. It is formed from a low transparent or translucent synthetic resin, for example, polyethylene.

The attachment of the identification sheet 402 can be performed, for example, as follows. First, the identification sheet 402 is positioned in the rectangular opening of the card body 408, and then both sides of the identification sheet 402 are covered with the first resin sheet 418, and then the card body 408 is placed. The front and back surfaces of the second resin sheet 420 are covered with a second resin sheet 420 and then heated and pressed from the front surface of the second resin sheet 420. The heating is set to a temperature range in which the second resin sheet 420 melts but the first resin sheet 418 does not melt. this By applying heat and pressure as described above, the entirety of the second resin sheet 420 is melt-bonded to the card body 408 and the first resin sheet 418. It is attached to the card body 408 while being covered with the 1 resin sheet 4 18 and the second resin sheet 420. Instead of covering with the second resin layer sheet 420 as described above, the card body 408 covered with the first resin sheet 418 is immersed in a liquid resin to form a coating layer. May be provided. In this way, the identification sheet 402 is stored in the opening of the force input body 408 and covered with the resin sheets 418, 420 to prevent the identification sheet 402 from being damaged. can do. In addition, by covering the front and back surfaces of the card body 408 with the second resin sheet 420, the strength of the force body 408 itself can be increased. Further, since the first resin sheet 418 is interposed between the identification sheet 402 and the second resin sheet 420 to be melted, the second resin sheet 420, which is melted Can be prevented from dissolving into the through-holes constituting the first to fourth identification patterns of the identification sheet 402, and thereby blurring of the interference fringes can be prevented.

Instead of the above-described configuration, for example, the resin may be substantially uniformly filled in each through-hole of the identification sheet 402, and interference generated by such filling may also be used. Blurring of stripes can be prevented, and in this case, the first resin sheet 418 can be omitted. Incidentally, the resin filled in each through hole of the identification sheet 402 may be somewhat increased, and the coating layer may be formed with the resin overflowing from each through hole. .

Next, the detection card 406 will be described. The detection card 406 has a rectangular detection card body 422, and the detection sheet 424 is attached to the detection card body 422. The detection sheet 424 includes a rectangular detection sheet main body 426, and the detection sheet main body 426 is formed to have substantially the same configuration as the identification sheet main body 407. Briefly, the detection sheet body 4 26 is provided with first to fourth regions P, Q, R, and S which are substantially equally divided vertically and horizontally, and the first region P includes the identification sheet 402 A first detection pattern 4 288 corresponding to the first identification pattern 4 10 is applied, and the first detection pattern 4 28 has the same “Γ Α” shape as the first identification pattern 4 10 described above. A second pattern Q is formed, and the second area Q includes the second identification sheet of the identification sheet 402. A second detection pattern 4330 corresponding to the pattern 4122 is applied, and this second detection pattern 4330 has a "star" -shaped buttery similar to the second identification pattern 4122. A third detection pattern 4 32 corresponding to the third identification pattern 4 14 of the identification sheet 402 is applied to the third region R, and the third detection pattern 4 3 2 has a “crowbar” -shaped pattern pattern similar to the third identification pattern 4 14 described above, and the fourth area S has a fourth identification pattern 4 1 of the identification sheet 402. A fourth detection pattern 4334 corresponding to 6 is performed, and a pattern having the same shape as the fourth identification pattern is formed on the fourth detection pattern 4334. I have. The first to fourth detection patterns 4 28 to 4 34 applied to the first to fourth regions P to S of the detection sheet 4 2 4 are the first to fourth regions of the identification sheet 402. Any appropriate one corresponding to the first to fourth identification patterns 411 to 416 applied to the area 428-434 may be used.

The detection sheet main body 4 26 is formed of, for example, a metal plate, similarly to the identification sheet main body 4 07, and the first to fourth detection patterns 4 are formed in the same manner as the identification sheet main body 4 7 7. 2 8 to 4 3 4 can be formed.

Such a detection sheet 424 is attached to the detection sheet main body 426 in the same manner as that of the identification sheet 402, for example, and although not shown, the detection sheet 424 is transparent. In addition, the detection card body 4 222 is covered with the translucent first resin sheet and the second resin sheet, and the detection card body 422 is covered with the second resin sheet. The detection card 406 having the detection sheet 424 is controlled by, for example, an inspector who identifies and checks the identification card 404, and the detection is performed by strictly storing the detection card 406. Forgery of the sheet 424 can be prevented, and as a result, forgery of the identification sheet 402 can also be prevented.

To determine whether the identification card 404 is genuine or not, the detection sheet attached to the detection card 406 can be overlaid on the identification sheet 402 attached to the identification card 404. No. The identification sheet 402 and the detection sheet 424 are overlapped as required, that is, the first to fourth regions A to D of the identification sheet 402 are respectively the first to fourth areas of the detection sheet 424. When the areas P to S are overlapped, the first identification patterns 4 10 and 4 1 of the identification sheet 402 are generated by light passing through the opening of the card body 4 08 and the opening of the detection card body 4 2 2. The first detection pattern 4 28 of the detection sheet 4 2 4 shows the interference fringes of the first optical interference characteristic, that is, the pattern of the Roman alphabet “A” in this embodiment, and the identification sheet 4 2 The second identification pattern 4 1 2 (third identification pattern 4 14, fourth identification pattern 4 16) of the second detection pattern 4 3 0 (third identification pattern 4 1 4 The interference pattern of the second optical interference characteristic (the interference fringe of the third optical interference characteristic, the interference fringe of the fourth optical interference characteristic) is obtained by the detection pattern 432 and the fourth detection pattern 434). In the form, “star” -like interference fringes (“clover” -shaped interference fringes, romaji “H” -shaped interference fringes) appear. Therefore, in the first to fourth regions P to S of the detection sheet 424 to be overlapped, interference fringes corresponding to the respective regions P to S are generated, so that the identification sheet 402 is genuine, in other words, the identification sheet. It is possible to easily and easily visually recognize that the identification card 404 to which the block 402 is attached is genuine. As can be easily understood, for example, the second area Q (or the third area R and the fourth area S) of the detection sheet 4 24 is superimposed on the first nod area 4 10 of the identification sheet 402. And the first identification pattern 410 of the identification sheet 402 and the second detection pattern 430 of the detection sheet 424 (or the third detection pattern 432, the fourth detection pattern). Since the pattern is different from that of 4 3 4), no interference fringes appear.

In the first embodiment, the identification sheet 402 is provided with first to fourth identification patterns 410 to 416, and the detection schemes corresponding to these identification patterns 410 to 416 are provided. The first to fourth detection patterns 4 2 8 to 4 3 4 are provided on the table 4 2 4, and the identification sheet 402 and the detection sheet 4 2 4 are overlapped to make four types of interference fringes appear. However, instead of this, two, three, or five or more kinds of identification patterns are provided on the identification sheet 402, and two, three, or five or more kinds of identification patterns are provided on the detection sheet 424. The same effect can be achieved by providing the detection pattern of, and overlapping the identification sheet 402 and the detection sheet 424 so that two, three, or five or more types of interference fringes appear. .

In the first embodiment, the first to fourth detection patterns are provided in the detection sheet 424 to generate four types of interference fringes. The first identification pattern 4 10 (or the second identification pattern) having the first optical interference characteristic (or the second optical interference characteristic, the third optical interference characteristic, the fourth optical interference characteristic) throughout the exit sheet 4 2 4. Identification The first detection pattern 4 2 8 (or the second detection pattern 4 30, the third detection pattern) corresponding to the pattern 4 12, the third identification pattern 4 14, and the fourth identification pattern 4 16) The pattern 43 and the fourth detection pattern 43) may be provided. In such a case, when the identification sheet 402 and the detection sheet 424 are overlapped during the identification test, the first area A (or the second area B or the third area C) of the identification sheet 402 is obtained. , In the fourth area D), the first identification pattern 410 (or the second identification pattern 412, the third identification pattern 414, the fourth identification pattern 416) and the first identification pattern 411 The first light interference characteristic (or the second light interference characteristic) depends on the detection pattern 428 (or the second detection pattern 430, the third detection pattern 432, and the fourth detection pattern 434). Characteristic, the third light interference characteristic, and the fourth light interference characteristic), and even in this case, it is possible to determine whether or not it is genuine in the same manner as described above. Such an effect can be achieved by providing two or more types of identification patterns having different optical interference characteristics on the identification sheet 2 and providing one or more types of detection patterns corresponding to the identification patterns on the inspection sheet 28.

Second embodiment of identification card

The identification sheet of the identification card according to the second embodiment will be described with reference to FIG. 12. The identification sheet 502 includes a rectangular identification sheet body 504, and the identification sheet body First and second areas A 1 and B 1 are provided in 504. The first area A 1 is formed in the shape of a romaji “cho”, and a second area B 1 is formed on the remaining portion thereof. The second area B 1 is provided on both sides of the first area A 1. The first area A 1 is provided with a first identification pattern 506 having a first light interference characteristic, and the first identification pattern 506 has one pattern shape of a Roman ΓI ”shape. The second region B 1 is provided with a second identification pattern 508 having a second optical interference characteristic, and the second identification pattern 508 has Many identification patterns are formed in the shape of the symbol “10”. The identification sheet 502 is formed in the same manner as the identification sheet 402 in the first embodiment, and is used in place of the identification sheet 402.

The detection sheet 5 10 superimposed on the identification sheet 5 0 2 includes a rectangular detection sheet main body 5 1 2, and the substantially entire area P 1 of the detection sheet main body 5 1 2 includes an identification sheet 5 0 A detection pattern 514 corresponding to the first identification pattern 506 of FIG. The detection pattern 5 14 has the same “IJ-shaped pattern pattern” as the first identification pattern 5 06. The detection sheet 5 10 is the detection sheet 4 according to the first embodiment. It is formed in the same manner as 24 and is used in place of the detection sheet 52. When the identification sheet 502 and the detection sheet 5110 are overlapped for identification inspection, the identification sheet 502 In addition, the first identification pattern 506 of the identification sheet 502 and the detection pattern 51 of the detection sheet 510 having mutually corresponding shapes are formed by the light passing through the detection sheet 501 and the detection sheet 510. 4, an interference fringe pattern of the first optical interference characteristic, that is, in this second embodiment, an interference fringe pattern of “口” appears, and this interference fringe pattern is in the first area A of the identification sheet 502. Appears in a roman “cho” shape corresponding to the shape of 1. Therefore, the identification sheet 502 is genuine because the interference fringes composed of the Roman “I” shape are formed in the Roman letter “D” shape as a whole in the overlapping detection sheets 501. Something can be easily and easily visually identified. The shape of the first nod area A1 can be recognized as that of the right holder who owns such marks by forming, for example, a logo mark, a trade mark, a service mark, and a brand name.

In the second embodiment, the detection pattern 514 corresponding to the first identification pattern 506 of the identification sheet 502 is provided in the entire area P1 of the detection sheet main body 512. Alternatively, a detection pattern corresponding to the second identification pattern 508 of the identification sheet 502, that is, a detection pattern pattern of the symbol “+” may be provided in the entire area P その. . In such a case, when the identification sheet 502 and the detection sheet 501 are superimposed, the second identification pattern 508 of the identification sheet 502 and the detection pattern of the detection sheet 50 An interference fringe pattern of the second optical interference characteristic, that is, an interference fringe pattern of the symbol “10” appears, and an area where this interference fringe pattern does not appear corresponds to the shape of the first area A 1 of the identification sheet 502. Then, it becomes a romaji “cho” shape.

In the second embodiment, as in the first embodiment, an interference fringe having a first light interference characteristic is generated corresponding to the first identification pattern 506 of the identification sheet 502, The detection pattern of the detection sheet 501 is formed in the same manner as the identification pattern of the identification sheet 502 so that an interference fringe of the second optical interference characteristic is generated corresponding to the second identification pattern 508. You can also. Third Embodiment of Identification Card

With reference to FIG. 13, an identification card according to a third embodiment of the identification card will be described. In the identification cards of the first and second embodiments, the identification pattern of each area of the identification sheet is formed in a different shape (different from a Roman character, a symbol, etc.). In this identification card, the shape of the identification pattern is made different by changing the size of the identification pattern in each area (the shape itself is the same but the size is different).

In FIG. 13, the identification sheet body 5554 of the identification sheet 552 of the identification card is provided with first and second areas A 2 and B 2. The first region A2 is formed in the shape of a "字" of a Roman character, and the second region Β2 is formed in the remaining portion, and the second region Β2 is provided around the first region A2. The first area A 2 is provided with a first identification pattern 556 having a first optical interference characteristic, and the first identification pattern 556 is formed in a square mesh. The second region B 2 is provided with a second identification pattern 558 having a second optical interference characteristic, and the second identification pattern 558 is larger than the first identification pattern 556. It is formed in a square mesh shape. Other configurations of the identification sheet 552 are the same as those of the identification sheet 402 in the first embodiment, and are used in place of the identification sheet 402.

The detection sheet 560 superimposed on the identification sheet 552 includes a rectangular detection sheet body 562, and the identification sheet is provided in substantially the entire area P2 of the detection sheet body 562. A detection pattern 564 corresponding to the first identification pattern 556 of the sheet 552 is applied, and the detection pattern 564 is a small eye square similar to the first identification pattern 556 described above. Is formed in a mesh shape. The other configuration of the detection sheet 560 is the same as that of the detection sheet 424 of the first embodiment, and is used in place of the detection sheet 424.

In the identification card of the third embodiment, when the identification sheet 552 and the detection sheet 560 overlap, the light passing through the identification sheet 552 and the detection sheet 560 causes mutual The first identification pattern 55 6 of the identification sheet 55 2 and the detection pattern 56 4 of the detection sheet 56 0 formed in a shape corresponding to A square mesh fringe pattern appears, and this fringe pattern The pattern appears in a Roman “H” shape corresponding to the shape of the first area A2 of the identification sheet 552, and the third embodiment achieves the same effect as the second embodiment. In the third embodiment, as described in the second embodiment, the second identification pattern 55 of the identification sheet 55 2 is added to the entire area P 2 of the detection sheet 560. 8 may be formed (in this case, interference fringes of the second optical interference characteristic are generated), or the detection pattern of the detection sheet 560 is identified by the identification sheet 55 2 May be formed in the same manner as the identification patterns 55 6 and 55 8. In this case, an interference fringe of the first optical interference characteristic is generated corresponding to the first identification pattern 556, and an interference fringe of the second optical interference characteristic is generated corresponding to the second identification pattern 558. .

Fourth embodiment of identification card

The identification sheet of the identification card according to the fourth embodiment will be described with reference to FIG. In the fourth embodiment, the shape of the identification pattern is made different by changing the pitch direction of the identification pattern in each region.

In FIG. 14, the identification sheet body 604 of the identification sheet 602 in the fourth embodiment is provided with first and second nod areas A3, B3. The first nod zone A 3 is formed in the shape of a マの口, and a second area Β 3 is formed on the remainder, and the second area Β 3 is provided around the first area A 3 . The first area A3 is provided with a first identification pattern 606 having a first optical interference characteristic, and the first identification pattern 606 is obliquely parallel to the horizontal direction at an angle of 45 degrees. It is formed in a quadrilateral mesh shape, the pitch of which is an oblique direction inclined by 45 degrees, and the second area B 3 has a second identification pattern 6 having a second optical interference characteristic. The second identification pattern 608 is formed in the shape of a square mesh, and their pitches are in the horizontal direction and in the vertical direction perpendicular to the horizontal direction. The other configuration of the identification sheet 602 is the same as that of the identification sheet 402 of the identification card of the first embodiment, and is used instead of the identification sheet 402.

The detection sheet 6 10 superimposed on the identification sheet 6 0 2 includes a rectangular detection sheet body 6 12, and substantially the entire area P 3 of the detection sheet body 6 12 includes the identification sheet 6. A detection pattern 6 14 corresponding to the second identification pattern 6 08 of 0 2 is applied, and the detection pattern 6 14 is the same as the second identification pattern 6 08 in the horizontal and vertical directions. It is formed in the shape of a square mesh having a vertical pitch. Other configurations of the detection sheet 6 12 are the same as those of the detection sheet 4 24 of the first embodiment, and are used in place of the detection sheet 4 24.

In the fourth embodiment, when the identification sheet 62 and the detection sheet 61 are overlapped, the light passing through the identification sheet 62 and the detection sheet 61 forms a shape corresponding to each other. The second identification pattern 6 08 of the identification sheet 6 02 and the detection pattern 6 14 of the detection sheet 6 10 indicate that the interference fringes of the second optical interference characteristic, that is, the square mesh interference fringes A pattern appears, and this interference fringe pattern appears in accordance with the shape of the second area B3 of the identification sheet 602, whereby a portion where no interference fringe appears (corresponding to the first area A3) ) Indicates the “H” shape of the Roman alphabet, and the fourth embodiment achieves the same effect as the second embodiment.

In the fourth embodiment, as described in the second embodiment, the first identification pattern 606 of the identification sheet 602 is added to the entire area P3 of the detection sheet 610. A corresponding detection pattern may be formed. In this case, an interference fringe having the first optical interference characteristic occurs. Further, instead of the above-described configuration, the detection pattern of the detection sheet 61 may be formed in the same manner as the identification patterns 606, 608 of the identification sheet 602. An interference fringe of the first optical interference characteristic is generated corresponding to the first identification pattern 606, and an interference fringe of the second optical interference characteristic is generated corresponding to the second identification pattern 608.

Fifth Embodiment of Discrimination Power

With reference to FIG. 15, an identification card according to a fifth embodiment of the identification card will be described. In the fifth embodiment, the optical interference characteristics of the identification patterns are made different by shifting the phase of the pattern arrangement of the identification patterns in each area.

In FIG. 15, the identification sheet body 654 of the identification sheet 652 is provided with first and second areas A4 and B4. In this fifth embodiment, the first region A 4 is formed in Roman gamma _Eta "shape, a second region beta 4 is formed on the remaining portion, the second area beta 4 is around the first region A 4 It is provided in. The first area A4 is provided with a first identification pattern 6556 having a first light interference characteristic, and the first identification pattern 6556 is formed in a square mesh shape. B4 has the second optical interference characteristic The second identification pattern 658 having the following is formed. The second identification pattern 6558 is formed in a square mesh shape, and the first identification pattern 6556 and the second identification pattern 6558. Means that the size of the square mesh is substantially the same, but the phase of the mesh of the first discrimination pattern 656-1 is larger than that of the mesh of the second discrimination pattern 6558 in Fig. 15. At a slightly higher position. Other configurations of the identification sheet 652 are the same as those of the identification sheet 402 of the identification card of the first embodiment, and are used instead of the identification sheet 402.

The detection sheet 660 includes a rectangular detection sheet main body 662, and substantially the entire area P4 of the detection sheet main body 662 includes the first identification pattern of the identification sheet 652. A detection pattern 666 corresponding to 656 is applied, and the detection pattern 666 is formed in a square mesh shape similar to the first identification pattern 656 described above. This detection pattern 664 is the same as the second identification pattern 666. The other configuration of the detection sheet 660 is the same as that of the detection sheet 424 of the first embodiment, and is used in place of the detection sheet 424.

In the fifth embodiment, when the identification sheet 652 and the detection sheet 62 are overlapped as required, the light passing through the identification sheet 652 and the detection sheet 66 Thus, the first identification pattern 656 of the identification sheet 652 and the detection pattern 664 of the detection sheet 660 form an interference fringe of the first optical interference characteristic, that is, a square mesh-like pattern. The area in which the interference fringe pattern appears, and the area where the interference fringe is generated appears in the “HJ” shape of the Roman alphabet corresponding to the first area A4, and from such a state, the identification sheet 652 and the detection sheet 660 Is slightly moved in the vertical direction and in the vertical direction in FIG. 15, the second identification pattern 658 of the identification sheet 652 and the detection pattern 664 of the detection sheet 660 are obtained. An interference fringe of the second optical interference characteristic, that is, a pattern of square mesh interference fringes appears, and accordingly, a portion where the interference fringes do not appear ( (Corresponding to the first region A4) indicates a “H” shape with a single dash, and the same effects as in the second embodiment are achieved in the fifth embodiment.

In the fifth embodiment, the phases of the arrangement of the first identification pattern 656 and the second identification pattern 658 of the identification sheet 652 are shifted in the vertical direction. Instead, or together with it, shift the phase of both pattern arrays in the horizontal direction. It may be. Also, in the fifth embodiment, as described in the second embodiment, the detection pattern of the detection sheet 660 is changed to the identification patterns 656, 6558 of the identification sheet 652. It may be formed in the same manner as described above. In this case, an interference fringe of the first optical interference characteristic is generated corresponding to the first identification pattern 656, and an interference fringe of the second optical interference characteristic is generated corresponding to the second identification pattern 658. Occurs.

Sixth embodiment of discriminating power

With reference to FIG. 16, an identification sheet according to a sixth embodiment of the identification card will be described. In the sixth embodiment, the light interference characteristics of the identification patterns are made different by shifting the angle of the pattern arrangement of the identification patterns in each area.

In FIG. 16, the identification sheet main body 704 of the identification sheet 720 is provided with first and second areas A5 and B5. The first area A5 is provided in a rectangular shape at the lower part of the identification sheet body 704, and the second area B5 is provided in a rectangular shape on the upper part. The first region A5 is provided with a first identification pattern 706 having a first optical interference characteristic, and a large number of triangular patterns are formed on the first identification pattern 706. The second region B5 is provided with a second identification pattern 708 having a second optical interference characteristic, and the second identification pattern 708 has a large number of inverted triangular patterns, that is, a first identification pattern. A pattern obtained by rotating the pattern 706 by 180 degrees is formed, and the first identification pattern 706 and the second identification pattern 708 have substantially the same triangular shape and size. There are, however, their arrays are rotated 180 degrees from each other. The other configuration of the identification sheet 72 is the same as that of the identification sheet 402 in the identification card of the first embodiment, and is used in place of the identification sheet 402.

The detection sheet 7110 includes a rectangular detection sheet main body 7 1 2, and substantially the entire area P 5 of the detection sheet main body 7 12 includes the first and second identification sheets 7 2 A detection pattern 714 corresponding to the patterns 706 and 708 is applied, and this detection pattern 714 is formed in the same triangular mesh shape as the first identification pattern 706 described above. ing. This detection pattern 714 is the same as the second identification pattern 708. The other configuration of the detection sheet 7104 is the same as that of the detection sheet 424 of the first embodiment, and is used in place of the detection sheet 4224.

In the sixth embodiment, the identification sheet 702 and the detection sheet 7110 are required. The first identification pattern 706 and the detection sheet 7 1 of the identification sheet 7 02 are illuminated by light passing through the identification sheet 7 02 and the detection sheet 7 10. The 0 detection pattern 714 shows an interference fringe of the first optical interference characteristic, that is, a triangular mesh interference fringe pattern, and from such a state, the identification sheet 702 and the detection sheet 7110 Are rotated by 180 degrees relative to each other, the interference pattern of the second optical interference characteristic is obtained by the second identification pattern 708 of the identification sheet 720 and the detection pattern 714 of the detection sheet 710. That is, an inverted triangular mesh-like interference fringe pattern appears. Also in the sixth embodiment, the same effect as in the second embodiment is achieved.

In the sixth embodiment, the arrangement of the first identification pattern 706 and the second identification pattern 708 of the identification sheet 720 is relatively rotated by 180 degrees. However, the relationship may be any angle, such as 90 degrees, and the shape may be an ellipse, a square, a hexagon, a character, a symbol, or the like instead of a triangle. Also, in the sixth embodiment, the detection pattern of the detection sheet 7 10 is the same as the identification patterns 7 0 6 and 7 0 8 of the identification sheet 7 0 2, as described in the second embodiment. Alternatively, it may be formed. In this case, an interference fringe of the first optical interference characteristic is generated corresponding to the first identification pattern 706, and an interference fringe of the second optical interference characteristic is generated corresponding to the second identification pattern 708. .

Seventh embodiment of identification card

With reference to FIG. 17, an identification card according to a seventh embodiment of the identification card will be described. In the seventh embodiment, the vertical and horizontal arrangement pitches of the identification patterns in the respective regions are equal, but the sizes of the through holes constituting the patterns are different, thereby reducing the optical interference characteristics of the identification patterns. Different.

In FIG. 17, the identification sheet body 754 of the identification sheet 752 is provided with first and second areas A6 and B6. The first area A 6 is provided on the identification sheet main body 7 _{54 in} a マ口 shape, and the remaining area is provided with the second area Β 6, and the second area Β 6 is the first area A Surrounds around 6. The first area A6 is provided with a first identification pattern 756 having a first light interference characteristic, and the first identification pattern 756 is formed in a square mesh shape. B 6 is provided with a second identification pattern 758 having a second optical interference characteristic, and the second identification pattern 758 is The first identification pattern 756 is formed in a square mesh shape similar to the pitch of the same, and the first identification pattern 756 and the second identification pattern 758 are formed in a portion of the through hole constituting the mesh. The sizes are different from each other, and in this embodiment, the through holes of the first identification pattern 756 are smaller than those of the second identification pattern 758. Other configurations of the identification sheet 752 are the same as those of the identification sheet 402 in the identification mode of the first embodiment, and are used in place of the identification sheet 402.

The detection sheet 760 includes a rectangular detection sheet body 762, and substantially the entire area P6 of the detection sheet body 762 includes the second sheet of the identification sheet 752. A detection pattern 764 corresponding to the identification pattern 758 is applied, and this detection pattern 764 is a square mesh shape similar to the second identification pattern 758, that is, a mesh shape having a large through hole. Is formed. Other configurations of the detection sheet 760 are the same as those of the detection sheet 424 of the first embodiment, and are used in place of the detection sheet 424.

In the identification card according to the seventh embodiment, when the identification sheet 752 and the detection sheet 760 are overlapped, the identification sheet 752 and the light passing through the detection sheet 760 generate the identification sheet. The second identification pattern 752 and the detection pattern 764 of the detection sheet 764 show the interference fringes of the second light interference characteristic, that is, a square mesh interference fringe pattern. As a result, the portion where the interference fringes do not appear, that is, the area corresponding to the first area A6 shows a roman “H” shape, and the seventh embodiment is similar to the second embodiment. The effect is achieved.

In the seventh embodiment as well, as described in the second embodiment, the first identification pattern 75 of the identification sheet 752 is added to the entire area P6 of the detection sheet 760. 6 may be formed. In this case, an interference fringe having the first optical interference characteristic is generated. In addition, instead of the above-described configuration, the detection pattern of the detection sheet 760 may be changed. It may be formed in the same manner as the identification patterns 756 and 758 of the identification sheet 752.

In the various embodiments described above, the first identification pattern and the second identification pattern of the identification sheet are changed in shape and the like, whereby the light interference characteristics of the two are made different. Etc. are substantially the same, and the thickness of the first identification pattern and the second identification The thickness of the pattern may be changed so that the light interference characteristics of the two may be different. For example, if the thickness of the identification pattern is relatively small, the generated interference fringes will be bright, but if the thickness is relatively large, the generated interference fringes will be dark, and the light interference characteristics will change due to the difference in thickness. I do.

Eighth embodiment of identification card

The identification sheet of the identification card according to the eighth embodiment will be described with reference to FIG. In the eighth embodiment, the barcode is used by using the first and second identification patterns of the identification sheet.

In FIG. 18, the identification sheet body 804 of the identification sheet 802 is provided with a first area A7 corresponding to a bar code for displaying information, and the remaining area is provided in the remaining area. A second area B7 is provided. The first area A7 is provided at a plurality of intervals with an appropriate width corresponding to the barcode information, and the second area B7 is provided so as to surround the first area A7. The first region A7 is provided with a first identification pattern 806 having a first optical interference characteristic, and the first identification pattern 806 is formed in a slender and elongated mesh shape. The inclination direction is different between the upper and lower parts of the first area A7 and the middle part thereof. Further, a second identification pattern 808 having a second optical interference characteristic is applied to the second region B7, and the second identification pattern 808 is formed in a square mesh shape. Other configurations of the identification sheet 802 are the same as those of the identification sheet 402 of the identification card of the first embodiment, and are used instead of the identification sheet 402.

The detection sheet 810 includes a rectangular detection sheet body 812, and substantially the whole area P7 of the detection sheet body 812 includes the second identification pattern 8 of the identification sheet 802. A detection pattern 814 corresponding to 08 is applied, and this detection pattern 814 is formed in the same square mesh shape as the second identification pattern 808. The other configuration of the detection sheet 810 is the same as that of the detection sheet 424 of the first embodiment, and is used in place of the detection sheet 424.

In the identification card according to the eighth embodiment, when the identification sheet 8 02 and the detection sheet 8 10 are overlapped, the light passing through the identification sheet 8 0 2 and the detection sheet 8 10 Detection of the second identification pattern 808 of the identification sheet 802 and the detection sheet 810 The pattern 8 14 shows an interference fringe of the second optical interference characteristic, that is, a square mesh-like interference fringe pattern, thereby forming a barcode area, that is, an area corresponding to the first area A 7. No interference fringes appear in the image, and therefore, by reading a portion without the interference fringes as a bar code, it can be used as a bar code using the interference fringes.

Also in the eighth embodiment, as described in the second embodiment, the first identification pattern 806 of the identification sheet 82 is added to the entire area P7 of the detection sheet 81. May be formed, and in this case, the interference fringes of the first optical interference characteristic function as a barcode. In this case, the longitudinal direction of the first region A7 may be composed of a plurality of portions, and the inclination directions of the meshes in each portion may be changed somewhat from each other. Even if the positional relationship between the detection pattern 8102 and the detection sheet 810 is slightly deviated, interference fringes are generated in a part of the first identification pattern 8106, and for example, the interference fringe as a bar code is detected by the identification device. It can be read reliably when reading.

Ninth Embodiment of Discriminating Power

The identification sheet of the ninth embodiment of the identification card will be described with reference to FIG. In the ninth embodiment, the identification sheet is used as, for example, an information card using the first and second identification patterns.

In FIG. 19, the identification sheet body 854 of the identification sheet 852 of the ninth embodiment is provided with a first area A8 over substantially the entire area thereof. Second regions B8 are provided at four specific sites. The first region A 8 is provided with a first identification pattern 856 having a first optical interference characteristic, and the first identification pattern 856 is formed in a square mesh shape. The area B 8 is provided with a second identification pattern 85 8 having a second light interference characteristic. The second identification pattern 85 8 has a large number of small “stars” having the shape shown in FIG. A pattern is formed (only one is shown as a representative in FIG. 19). The other configuration of the identification sheet 852 is the same as that of the identification sheet 402 in the first embodiment, and is used instead of the identification sheet 402.

The detection sheet 860 includes a rectangular detection sheet main body 860, and the detection sheet In almost the entire region P8 of the body 862, a number of small “star” patterns having the shape shown in FIG. 19 are formed (in FIG. 19, the shape of the “star” pattern in each region is represented. And show one). The area corresponding to each second area B8 of the identification sheet 852 of the detection sheet body 862, ie, the area of (a) step (4), the area of (b) step (6) In the area, (c) step position (2) and (d) step position (5), a detection pattern 864 corresponding to the second identification pattern 858 of the identification sheet 852 is provided. Are formed, and a number of small “star” patterns similar to the second identification pattern 858 are formed. Also, in the remaining area of the detection sheet 862 except for the above four areas, a number of small "star" patterns formed by rotating the "star" pattern applied to the four above areas by 180 degrees are formed. It has been. Further, almost the entire area of the detection sheet 860 is provided with another detection pattern 868 corresponding to the first identification pattern 856 described above. Is formed. The other structure of the detection sheet 860 is the same as that of the detection sheet 424 of the first embodiment, and is used in place of the detection sheet 424.

In the identification card of the ninth embodiment, when the identification sheet 852 and the detection sheet 860 are overlapped, the identification sheet 852 and the light passing through the detection sheet 860 can be used for identification. The second identification pattern 858 of the sheet 852 and the detection pattern 864 of the detection sheet 860 cause the interference fringes of the second optical interference characteristic, that is, the same as the second identification pattern 858. "Star" interference fringes appear. In this identification sheet 852, the second identification pattern 858 has the above-mentioned “star J pattern” applied to the portion corresponding to the information. Therefore, the position of the appearing interference fringe is replaced with the information. In Fig. 11, the interference fringes at the “(a)” stage indicate the position “(4)”, the “(b) J interference fringes indicate the position“ (6) J ”, and the r (c) j stage The interference fringes indicate the position “(2)”, and the “(d) J-stage interference fringes indicate the position“ (5) ”. By associating the information and the stages and positions of these interference fringes, The information can be read by the appearing interference fringes, and can be used as information power. This location information can be associated as information such as date, registration number, etc., and this information card can be applied, for example, as an entry card, a personal registration card, etc. By changing the position of 58, the information contained in the identification sheet 852 can be changed. In addition, this form In this example, since other detection patterns 8668 are provided on the detection sheet 8660, square mesh interference fringes also appear, but the other detection patterns 8668 can be omitted.

In each of the above-described embodiments, the identification sheet and the detection sheet are made of a metal plate, and various identification patterns and various detection patterns are made up of through holes formed in the metal plate. Even with such a configuration, similar interference fringes can be generated. That is, a transparent or translucent material such as a synthetic resin material such as polypropylene or a base member formed of glass or the like is used as a base material of the identification sheet (detection sheet), and various identification patterns (various detection patterns) are formed on the surface of the base member. The identification pattern (detection pattern) can be formed by, for example, a sputtering method. Thus, even when the identification pattern is provided on the surface of the transparent or translucent base member, interference fringes are generated using the transmitted light passing through the identification sheet and the detection sheet.

The interference fringes are generated not by using the transmitted light passing through the identification sheet and the detection sheet but by using the reflected light reflected by the identification sheet (this reflected light passes through the detection sheet). In such a case, the base member of the identification sheet does not need to be made of a transparent or translucent material, and may be, for example, white paper. Various identification patterns may be formed on the surface of the base member by printing or the like. Can be. Industrial applicability

As described above, the identification sheet, the identification card, and the identification method of the present invention can be used to identify whether or not a genuine product is genuine by attaching it to a genuine article, and the identification can be visually performed. It can be done easily and easily and is useful for preventing counterfeiting, which has become a social problem.

Claims

The scope of the claims

1. An identification sheet that uses a sheet-shaped main body directly provided with a fine identification pattern and overlaps a sheet-like member having a similar fine identification pattern to generate interference fringes.

2. Identification using a sheet-like body with a fine identification pattern provided on the surface of a transparent or translucent base, and overlapping a sheet-like member with a similar fine identification pattern to generate interference fringes. Sheet.

3. An identification sheet in which a fine identification pattern is provided on both sides of a transparent or translucent base portion to generate interference fringes.

4. A sheet-shaped main body having a fine identification pattern is provided, and a first resin sheet having a high melting point is provided on both surfaces of the sheet-shaped main body. A second resin sheet lower than the resin sheet is provided, and the first and second resin sheets are attached to both surfaces of the sheet-like body by melting the second resin sheet. Identification sheet.

5. An identification method in which a sheet-like body directly provided with a fine identification pattern is used, sheet-like members having the same fine identification pattern are overlapped, and identification is performed by generated interference fringes.

6. An identification method in which a sheet-like body having a fine identification pattern provided on the surface of a transparent or translucent base portion is overlapped with a sheet-like member having the same fine identification pattern, and identification is performed based on generated interference fringes. .

7. The identification method according to claim 5, wherein the sheet-shaped main body and the sheet-shaped member are overlapped to form an identification sheet, and the identification sheet is attached to an article.

8. An identification sheet is constituted by one of the sheet-shaped main body and the sheet-shaped member, and a detection sheet is constituted by the other of them, and the identification sheet is attached to an article, and the identification sheet is checked. 7. The identification method according to claim 5, wherein the detection sheet and the identification sheet are overlapped.

9. A discriminating force having a discrimination sheet that generates interference fringes by using transmitted light or reflected light when superimposed on a detection sheet having a detection pattern, The identification sheet includes a first region where a first identification pattern having a first optical interference characteristic is formed and a second region where a second identification pattern having a second optical interference characteristic is formed. Wherein the first light interference characteristic of the first identification pattern and the second light interference characteristic of the second identification pattern are different from each other;

When the identification sheet and the detection sheet are overlaid, the first light interference characteristic or the first light interference characteristic is obtained by the first identification pattern or the second identification pattern and the detection pattern of the detection sheet. An identification card, wherein an interference fringe having the second optical interference characteristic is generated.

10. The detection sheet has a first detection pattern and a second detection pattern, and when the identification sheet and the detection sheet are overlapped, the first identification pattern of the identification sheet is An interference fringe of the first optical interference characteristic is generated by the first detection pattern of the detection sheet, and the second identification pattern of the identification sheet and the interference pattern of the detection sheet are generated. 10. The discriminating unit according to claim 9, wherein an interference fringe having the second light interference characteristic is generated by the second detection pattern.

11. The identification card according to claim 9, wherein the first identification pattern and the second identification pattern of the identification sheet have different pattern shapes from each other.

12. The identification according to claim 11, wherein the first identification pattern of the identification sheet has a specific shape, and the second identification pattern has another shape different from the specific shape. Force.

13. The discriminating mode according to claim 11, wherein the discriminating pattern of the discriminating sheet and the second discriminating pattern have different sizes of patterns.

14. The discriminating power according to claim 9, wherein the first discriminating pattern and the second discriminating pattern of the discriminating sheet have different thicknesses from each other.

15. The phase of the first discrimination pattern and the second discrimination pattern of the discrimination sheet are different from each other in phase. The discriminatory power of

16. The discriminating method according to claim 9, wherein the first discrimination pattern and the second discrimination pattern of the discrimination sheet have an angle of their pattern arrangement shifted from each other. .

17. The identification card according to claim 9, wherein the first area and / or the second area of the identification sheet has a specific shape.

18. Using an identification article having an identification sheet and a detection card having a detection sheet, the identification sheet and the detection sheet are overlapped during an identification test and interference fringes are generated using transmitted light or reflected light. An identification method for identifying the identification article by the generated interference fringes,

When the identification sheet and the detection sheet are overlapped, the first light interference characteristic or the second light interference characteristic is determined by the first identification pattern or the second identification pattern and the detection pattern. An identification method characterized in that interference fringes are generated.

19. The detection sheet has a first detection pattern corresponding to the first identification pattern of the identification sheet and a second detection pattern corresponding to the second identification pattern of the identification sheet. When the identification sheet and the detection sheet are overlapped, interference of the first light interference characteristic is caused by the first identification pattern of the identification sheet and the first detection pattern of the detection sheet. A fringe is generated, and an interference fringe of the second light interference characteristic is generated by the second identification pattern of the identification sheet and the second detection pattern of the detection sheet. The identification card according to claim 18.