JPH081538B2 - Card and its information reading method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to technology for preventing forgery of cards such as ID cards, credit cards, bank cards, check cards, IC cards, etc., and particularly card-specific information for forgery prevention. The present invention relates to a card for recording an image as a reproduced image of a hologram and a method for reading information from the card.

(Prior Art) Conventionally, in a magnetic card, card-specific information such as a personal identification number is recorded on a magnetic stripe provided on the card surface. The information recorded in this way is often erased and confused by the influence of an external magnetic field, or is easily rewritten and abused by a commonly available magnetic read / write device to improve the security of the information. There was a lack of surface. Therefore, various anti-counterfeiting methods for such a card have been attempted, and one of them has been provided with a hologram having unique information. In this method, illumination light is applied to the hologram provided on the surface of the card, and the spot that appears at any point on the line of the reflected light or the transmitted light is read as information, but the hologram is reproduced with a simple light source. There is a drawback that the recorded information may be easily read and the amount of recorded information is limited.

(Object of the Invention) The present invention has been made in view of the above points of the present invention, and an object of the present invention is to provide a card having card-specific information that cannot be easily forged and a method for reading the information.

(Summary of the Invention) The present inventors use the reproduced image as pattern information instead of the recorded information as bits of the reproduced image of the hologram, and the reproduced images that are multiplex-recorded in the hologram are different in the same direction. The present invention has been achieved by finding that if the image is formed at a distance, it is practically impossible to rewrite the recorded information, and that the recorded information is difficult to read. That is what I got.

That is, the card of the first invention of the present application is a card having a hologram in which card-specific information recorded on the card is multiplex-recorded as information on the shape, number and image-forming distance of the reproduced image of the hologram, Each of the reproduced images recorded in multiplex is stored at different distances in the same direction. Further, in the information reading method of the second invention of the present application, the card-specific information recorded on the card is the shape of the reproduced image of the hologram. A method for reading information of a card, comprising: a hologram in which multiple information is recorded as information on the number and the image formation distance, and the reproduced images multiplexed in the hologram are combined at different distances in the same direction. The hologram is illuminated with reconstructed light, and the light receiving part on which the reconstructed image is projected is moved in a predetermined diffraction direction from the hologram surface to reconstruct at a plurality of image forming points. It is characterized in that the read information by recognizing Namazo.

(Example) Hereinafter, the Example of this invention is described based on drawing.

FIG. 1 is a plan view showing an embodiment of the card of the present invention.

A hologram 10, a hologram 20 and a holographic 30 are provided at an array position according to the card-specific information recorded on the card substrate 1.

In these holograms, each reproduced image is recorded in the same direction on the basis of a plurality of transparent originals for hologram creation in which card-specific information is represented as information on the shape, number and image forming distance of the reproduced image. It is a relief hologram created by multiplex recording so as to form an image at a specific distance according to the information to be recorded. Since the hologram according to the present invention has information recorded as described above, when a beam is used as the reproduction light, the reproduction image developed from the hologram diverges,
The images are overlapping and the individual images cannot be recognized.

Further, even if the entire surface of the hologram is illuminated, since it has a plurality of image forming positions, it is very difficult for a forger who does not know the image forming distance and the number of image forming points to read it.

As the above-mentioned hologram, conventionally known holograms can be widely used, but in particular, laser reproduction holograms such as Funnel hologram, Fraunhofer hologram, and lensless Fourier transform hologram are suitable.
Further, a hologram in which a rainbow hologram for the purpose of decoration is multiplex-recorded can also be used in the above hologram, and in this case, a reproduced image of the rainbow hologram can be obtained by its own color light.

Functionally, either a reflection hologram having a light reflecting metal thin film layer or a transparent hologram having a hologram effect layer can be used. When a transparent hologram is used, it is provided on a card substrate. It has the advantage that a hologram can be provided on the image and more advanced information can be added by combining the image information of the card and the reproduction information of the hologram, and it is excellent in terms of design appearance without disturbing the design of the card. Becomes

As a method of providing such a hologram on the card substrate, a duplication mold obtained by forming a relief hologram by a known method is used to directly heat the material for forming the hologram provided on the card substrate by heating. Although there are a method of providing by pressure processing and a method of providing by a transfer method using a hologram transfer sheet created using the above-mentioned duplication mold, in the present invention, the transfer method using a hologram transfer sheet is preferably used. It is preferable from the viewpoint of sex.

That is, according to the transfer method, if one roll of the transfer sheet having one type of reproduced image pattern is prepared,
Even if the number of holograms provided on the card is J, it is possible to easily manufacture 1 ^j cards having different card-specific information by the continuous transfer method.

FIG. 2 is a sectional view of the hologram transfer sheet according to the present invention.

On the base film 51, the protective layer 52 and the hologram forming layer
The hologram transfer sheet 50 is formed by sequentially stacking 53, the reflective metal thin film layer 54 or the hologram effect layer 55, and the adhesive layer 56.

The base film 51 has a function of increasing the mechanical strength of the hologram transfer sheet 50, and as its material, any film can be used, such as polyimide,
Polystyrene, polyvinyl butyral, polyester,
Plastic films such as polyacrylate, polyvinyl chloride, polyurethane, polycarbonate, and polymethacrylate, synthetic paper, metal films, and laminates thereof can be used.

The protective layer 52 provides a peeling property between the base film and the hologram forming layer 53, and after the transfer, the hologram forming layer.
It serves to protect 53, and as its material, butyral resin, vinyl acetate resin, vinyl resin, acrylic resin, polyester resin, urethane resin, amide resin, epoxy resin, cellulose acetate resin, etc. are used. It is formed with a thickness of 1 to 10 μm.

The hologram forming layer 53 is formed of a single layer structure or a multi-layer structure made of a photosensitive material for hologram or an embossed hologram forming material, and the thickness thereof can be appropriately selected depending on the type, but is generally 0.1 by a general printing and coating method. .About.50 .mu.m, preferably 0.5 to 5 .mu.m.

The embossed hologram is suitable for the present invention, and the resin for forming the embossed hologram can be matured at the time of molding (reproduction) of the hologram, and after the hologram is formed, that is, at the time of processing, the heat pressure and the adhesive at the time of processing are used. It is necessary to have enough resistance to the solvent in it. As such a resin, a so-called ultraviolet curable resin, an electron beam curable resin, a thermosetting resin, a reactive resin such as a natural curable resin, or the like can be used. Especially when considering productivity,
Resins that cure with ultraviolet light or electron beams are suitable.

Specifically, for example, methyl (meth) acrylate,
[Note that the term (meth) acrylate includes both acrylate and methacrylate. The same applies hereinafter], ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, isomyl (meth) acrylate, cyclohexyl (meth) acrylate, 2- Ethylhexyl (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol Tri (meth) acrylate, pentaerythritol (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene glycol diglycidyl ether (Meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol diglycidyl ether di (meth) acrylate,
Sorbitol tetraglycidyl ether tetra (meta)
A monomer having a radically polymerizable unsaturated group such as acrylate may be used.

Further, as the ultraviolet ray or electron beam curable resin having a maturing property, a method (a) to be described later is applied to a polymer obtained by polymerizing or copolymerizing the following compounds (1) to (8).
What introduced the radical polymerizable unsaturated group by (d) is used.

(1) Monomer having hydroxyl group; N-methylol (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate,
2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate and the like.

(2) Monomers having a carboxyl group: (meth) acrylic acid, (meth) acryloyloxyethyl monosuccinate and the like.

(3) Epoxy group-containing monomer: glycidyl (meth)
Acrylate etc.

(4) Monomers having an aziridinyl group: 2-aziridinylethyl (meth) acrylate, allyl 2-aziridinylpropionate and the like.

(5) Amino group-containing monomer: (meth) acrylamide, diacetone (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate and the like.

(6) Monomer having a sulfane group: 2- (meth) acrylamido-2-methylpropanesulfonic acid and the like.

(7) Monovalent compound having isocyanate group: 1 mol to 1 mol adduct of 2,4-toluene diisocyanate and 2-hydroxyethyl (meth) acrylate, etc., and adduct of radically polymerizable monomer having active hydrogen. etc.

(8) Furthermore, in order to control the glass transition point of the above copolymer or the physical properties of the cured film, the above compound and the following monomer copolymerizable with this compound And can be copolymerized. Examples of such a copolymerizable monomer include methyl (meth) acrylate,
Ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate,
Examples thereof include isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.

Next, the polymer obtained as described above is reacted by the methods (a) to (d) described below to introduce a radically polymerizable unsaturated group, whereby an ultraviolet ray or electron beam curable resin is obtained. .

In the case of (a) a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as (meth) acrylic acid is subjected to a condensation reaction.

(B) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the above-mentioned monomer having a hydroxyl group is subjected to a condensation reaction.

(C) In the case of a polymer or copolymer of a monomer having an epoxy group, an isocyanate group or an aziridinyl group, the above-mentioned monomer having a hydroxyl group or a monomer having a carboxyl group is added.

(D) In the case of a polymer or copolymer of a monomer having a hydroxyl group or a carboxyl group, a monomer having an epoxy group, a monomer having an aziridinyl group or a diisocyanate compound and a hydroxyl group-containing acrylic acid ester unit amount The addition reaction of 1: 1 mol of the body may be carried out.

Furthermore, the above-mentioned monomer and the above thermoformable ultraviolet ray or electron beam curable resin can be mixed and used.

Further, the above can be sufficiently cured by electron beam irradiation, but when cured by ultraviolet irradiation, benzoquinone, benzoin, benzoin ethers such as benzoin methyl ether, and halogenated acetophenones are used as sensitizers. It is also possible to use a material that generates radicals by irradiation with ultraviolet rays.

Furthermore, it is possible to color the hologram layer 53 in a light-transmitting manner by kneading appropriate dyes and pigments into these resins. The dye is preferably in the form of an oil-soluble metal complex salt having a cloud value of 10% or less measured by a haze meter, for example, 1-2 type azo metal complex salt dye, 1-1 type azo metal complex salt dye, Metal phthalocyan dyes and their organic base salts can be used. As the pigment, those having a particle size of 1/2 or less of the wavelength of light are preferable, and for example, Sicotrans Yellow, HF Chip 4B manufactured by Taisei Kako Co., Ltd. can be used.

On the surface of the hologram forming layer 53, a minute concavo-convex pattern for expressing a reproduced image corresponding to card-specific information by reproducing light is formed as a pattern with a pitch of 0.1 to 2 μm and a height difference of concavo-convex of about 0.01 to 2 μm by the embossing method. Has been done.

On the hologram forming layer 53, a reflective metal thin film layer 54 is formed when the hologram is a reflection type, and a hologram effect layer 55 is formed when the hologram is a transparent type.

The reflective metal thin film layer 54 provides the hologram layer 53 with reflectivity, and includes Cr, Ti, Fe, Co, Ni, Cu, Ag, Au, and G.
e, Al, Mg, Sb, Pb, Pd, Cd, Bi, Sn, Se, In, Ga, Rb
Or other metals and their oxides, nitrides, etc. alone or 2
It is formed by combining more than one type. Out of these metals
Al, Cr, Ni, Ag, Au, etc. are particularly preferable, and the film thickness is 10
~ 10,000Å Desirably 200 to 2,000Å.

The hologram effect layer 55, in combination with the hologram forming layer 53, exerts a hologram effect and has a function of not hiding the lower layer.

As the material of such a hologram effect layer 55, any material having a light transmitting property capable of exhibiting a hologram effect can be used.For example, a transparent material having a refractive index different from that of the hologram forming layer, a reflection having a thickness of 200 Å or less. A metal thin film layer. In the former case, the refractive index may be larger or smaller than that of the hologram forming layer, but the difference in refractive index is preferably 0.1 or more, more preferably 0.5 or more. According to the experiments conducted by the present inventors, the optimum value is 1.0 or more. By providing the transparent thin film layers having different refractive indexes as described above, the hologram is expressed and the lower layer is not hidden.

In the latter case, the reflective metal thin film layer has a thickness of 200 Å or less and thus has a large light wave transmittance, and therefore exhibits a hologram effect-producing action and a transparent portion non-concealing action. In addition, by setting the film thickness to 200 Å or less, it is possible to eliminate the previously uncomfortable appearance due to the high brightness of silver gray.

As the material of the thin film layer, for example, the following materials (1) to (6) can be used.

(1) Transparent continuous thin film having a refractive index larger than that of the hologram forming layer. There are a transparent continuous thin film in the visible region and a transparent continuous thin film in the infrared or ultraviolet region. The former is shown in Table 1 and the latter is
Each is shown in the table. In the table, n represents the refractive index (hereinafter,
The same applies to (2) to (5)).

Table 2 Infrared or UV transparent material Material n CdSe 3.5 CdTe 2.6 Ge 4.0 to 4.4 HfO2 2.2 PbTe 5.6 Si 3.4 Te 4.9 TlCl 2.6 ZnTe 2.8 (2) A transparent ferroelectric material with a larger refractive index than the hologram forming layer It is shown in Table 3.

Table 3 Material n CuCl 2.0 CuBr 2.2 GaAs 3.3 to 3.6 GaP 3.3 to 3.5 N ₄ CH ₂₆ 1.6 LiNbO ₃ 2.3 LiTaO ₃ 2.2 BaTiO ₃ 2.4 SrTiO ₃ 2.4 KTaO ₃ 2.2 (3) Transparent with a smaller refractive index than the hologram forming layer A continuous thin film is shown in FIG.

Table 4 Material n LiF 1.4 MgF ₂ 1.4 ₃ NaF ・ AlF ₃ 1.4 AlF ₃ 1.4 NaF 1.3 GaF ₂ 1.3 (4) Reflective metal thin film with thickness less than 200Å Reflective metal thin film has complex refractive index Rate: n
Is represented by n = n−iK. n is the refractive index and K is the absorption coefficient. The material of the reflective metal thin film layer used in the present invention is shown in Table 5, and the table also shows the above n and K.

Table 5 Material n K Be 2.7 0.9 Mg 0.6 6.1 Ca 0.3 8.1 Cr 3.3 1.3 Mn 2.5 1.3 Cu 0.7 2.4 Ag 0.1 3.3 Al 0.8 5.3 Sb 3.0 1.6 Pb 1.9 1.3 Ni 1.8 1.8 Sr 0.6 3.2 Ba 0.9 1.7 La 1.8 1.9 Ce 1.7 1.4 Au 0.3 2.4 Other materials such as Sn, In, Te, Fe, Co, Zn, Ge,
Pb, Cd, Bi, Se, Ga, Rb, etc. can be used. In addition, oxides and nitrides of the above-mentioned metals can also be used,
Further, the metal, its oxide, the nitride, etc. may be used alone or in combination of two or more kinds.

(5) Resin Having Different Refractive Index from Hologram Forming Layer The hologram forming layer may have a larger or smaller refractive index. Examples of these are shown in Table 6.

Table 6 Resin n Polytetrafluoroethylene 1.35 Polychlorotrifluoroethylene 1.43 Vinyl acetate resin 1.46 Polyethylene 1.52 Polypropylene 1.49 Methyl methacrylate 1.49 Nylon 1.53 Polystyrene 1.60 Polyvinylidene chloride 1.62 Vinyl butyral resin 1.48 Vinyl formal resin 1.50 Polyvinyl chloride 1.53 Polyester resin 1.55 Formalin carboxylic acid resin 1.60 In addition to the above, general synthetic resins can be used, but resins having a large difference in refractive index from the hologram forming layer are particularly preferable.

(6) Laminated body obtained by appropriately combining the materials of (1) to (5) The combination of the materials of (1) to (5) is arbitrary, and the vertical positional relationship of each layer in the layer structure is arbitrarily selected. To be done.

Of the thin film layers (1) to (6) described above, the thin film layer of (4) has a thickness of 200 Å or less, but the thin film layers of (1) to (3) and (5) and (6) have a thickness of Any transparent region of the material forming the thin film may be used, and generally, it is preferably 10 to 10000Å, more preferably 100 to 5000Å.

As a method of forming the hologram effect layer 55 on the hologram forming layer 54, when the thin film layer is made of the material of (1) to (4), a vacuum deposition method, a sputtering method, a reactive sputtering property, an ion plating method. A general thin film forming means such as an electric plating method can be used, and when the thin film layer is made of the material (5), a general coating method or the like can be used. When the thin film layer is made of the material described in (6) above, the above-mentioned means and methods are appropriately combined and used.

In the case of the material of the above (5), the material may not be a thin film as long as it is a transparent material, and as another embodiment of the present invention, a resin layer having a thickness equal to or larger than that of the thin film may be provided in the hologram forming layer.

The adhesive layer 56 is for firmly adhering the hologram to the card, and its material is known as a conventional adhesive such as acrylic resin, urethane resin, amide resin, epoxy resin, rubber resin, and ionomer resin. It can be widely used, and the film thickness thereof is preferably 0.1 to 50 μm, and more preferably 1 to 10 μm.

Further, in the hologram transfer sheet 50 according to the present invention, in order to enhance the adhesiveness between the hologram forming layer 53 and the protective layer 52 and enhance the durability of the hologram forming layer 53, a curable acrylic resin, a cellulose resin, A hologram forming layer 53 and a protective layer 52 are formed by overprinting a vinyl resin or the like.
It may be provided between. Further, in order to improve the adhesiveness between the hologram forming layer 53 and the adhesive layer 56, an anchor layer made of vinyl chloride-vinyl acetate copolymer, acrylic resin, urethane resin or the like is provided as the hologram forming layer 53 and the adhesive layer. It may be provided between 56 and.

Hologram transfer sheet 50 formed as described above
Can be obtained by stacking the adhesive layer at an array position according to the card-specific information so that the adhesive layer is in contact with the surface of the card substrate, peeling off the base film after heating and pressing, and transferring the hologram to the card to obtain the card of the present invention. it can.

By the transfer method using the hologram transfer sheet as described above, information can be easily added to the card, so that the card can be manufactured with high mass productivity.

Next, the information recording / reproducing method of the card of the present invention will be described.

3 (A), (B), (C), (D), (E),
(F) is an explanatory view showing an example of the information recording method of the present invention, and (A), (B), and (C) are holograms, respectively.
10, the hologram 20 and the hologram 30 are two-dimensional representations of recorded states of reproduced images, and (D), (E), and (F) are three-dimensional representations. (L _n : n = 1 to 9 in the figure represent the image forming distance of each reproduced image from the hologram surface) Card-specific information recorded on the card, for example, reproduced image 101 of hologram 10 having a secret code number, Reconstructed images 201 and 202 of the hologram 20 in which the cardholder name is similarly recorded by the pattern information in which the square shape, the number and the image forming distances L ₁ , L ₂ and L ₃ are combined to form 102 and 103. The check digit is a reconstructed image 301, 302, 303, 3 of the hologram 30.
It is recorded as 04.

Then, the pattern information of these individual reproduced images and the information of the array position of each reproduced image on the card (for example, in the present embodiment, the hologram 10 from the right end of the card, the hologram
20 and a hologram 30 are provided, and this arrangement means a specific card issuing office. ] And are recorded as one card-specific information.

Since information is recorded in this way, the number of holograms provided on the card may be one or more, the formation position is not limited, and the shape, number, and reproduction position of the reproduced images are not limited. However, for example, if the reproduced image pattern is recorded as a bar code, it can be handled as bar code information such as JAN code and NW-7 code.

A hologram on which a reproduced image representing such card-specific information is recorded is formed on the surface of the card to record the unique information on the card, but the recorded unique information is usually not reproduced by the hologram with white light. It can only be recognized that the card is provided with a thin metal or plastic membrane.

However, if the entire surface of the hologram formed on the surface of the card substrate is illuminated with laser parallel light or the like, the hologram forms a reproduction image, and a reproduction image equivalent to a transmission original is projected on the light receiving portion provided at the image formation position. The recorded information can be read.

FIG. 4 is an explanatory view schematically showing a method of reading information when a laser is used as a light source for hologram reproduction.

When the laser beam oscillated from the light source 60 irradiates the entire surface of the hologram 10 on the card substrate 1 which has been magnified to a required size by the magnifying optical system, the hologram is imaged and depends on the conditions at the time of photographing the reproduced image 101. Light receiving unit 70 set at position L _{1 of the} imaging distance (moves according to the image reproduction position)
A reproduced image 101 equivalent to the transparent original is projected on the screen. Next, the light receiving unit 70 is sequentially moved in the diffraction direction to form an image forming distance L of the reproduced image 102.
Projecting 102 at the position ₂ and the reproduced image 103 at the position of the image forming distance L ₃ , forming the images 101, 102, 103 of the reproduced images, and reproducing to the card the pattern information in which the number and the image forming distance are combined. The position information of the image is read. Next, the hologram
By performing the same operation (not shown) on the hologram 30 and the hologram 30 to read the information, the information peculiar to the card is read and the authenticity of the card can be determined.

The light source 60 used for the above reading may be one capable of reproducing a hologram, for example, a discharge lamp such as a mercury lamp, a sodium lamp, and a metal halide lamp having a narrow emission wavelength, a gas laser, a semiconductor laser, or the like. Further, lasers, EL panels, light emitting diodes, etc. can also be used.

As the light receiving unit 70, a photoelectric tube, a photomultiplier tube, an image tube, an SEC tube, a SIT tube, an image pickup tube such as a vidicon or a saticon, an MO
Solid-state image pickup tubes such as S-type, CID-type, CCD-type, BBD-type, and PCD-type can be used, but it is particularly preferable to use a CCD image sensor, a photodiode array, a phototransistor array, or the like configured of these.

(Effect of the invention) The card-specific information recorded on the card of the present invention is
Since the hologram is recorded as pattern information based on the combination of the shape, number, and arrangement position of the images that make up the reproduced image of the hologram, the recorded information is referenced at the time of recording using the same light source as at the time of recording. If it is not illuminated from the same angle as the incident angle of light, it will be difficult to read, and the reproduced images recorded in the hologram will be imaged at different distances in the same direction. , The reproduced light that composes each image overlap, and the individual images cannot be recognized.
It is very difficult for a forger who does not know the imaging distance and the number of imaging points to read it, and
Due to the redundancy of the hologram, in order to modify the reproduced image of the hologram, each interference fringe must be re-engraved,
It is virtually impossible to be forged, and has extremely high forgery or alteration resistance.

Further, according to the present invention, the information to be recorded / reproduced becomes an image called pattern information which is a combination of the shape, number and arrangement position of the images forming the reproduced image of the hologram, and therefore, it is not possible to record / reproduce information by a conventional spot. Differently, it significantly increases the amount of information recorded.

[Brief description of drawings]

FIG. 1 is a plan view of a card of one embodiment of the present invention, FIG. 2 is a sectional view of a hologram transfer sheet used in the present invention, and FIGS. 3 (A), (B), (C) and (D). , (E), (F)
Is an explanatory diagram of a recording method of the present invention, and FIG. 4 is an explanatory diagram of an information reading method of the present invention. 1 ... Card substrate 10, 20, 30 ... Hologram 50 ... Hologram transfer sheet 51 ... Base film 52 ... Protective layer 53 ... Hologram forming layer 54 ... Reflective metal thin film layer 55 ... Hologram effect layer 56 ...... Adhesive layers 101, 102, 102 …… Reconstructed image of hologram 10 201, 201 …… Reconstructed image of hologram 20 301, 302, 303, 304 …… Reconstructed image of hologram 30 …… Light source for hologram reproduction 70 …… … Light receiver

Claims (5)

[Claims] 1. A card having a hologram in which card-specific information to be recorded on a card is multiplexed and recorded as information on the shape, number and image-forming distance of the reproduced image of the hologram. A card characterized in that each reproduced image is formed at different distances in the same direction. 2. The card according to claim 1, wherein the hologram is a transparent hologram. 3. The card according to claim 1, wherein the hologram is a combination with a rainbow hologram for the purpose of decoration. 4. A card according to any one of claims (1) to (3), wherein the reproduced image of the hologram is a bar code. 5. A hologram in which card-specific information to be recorded on a card is multiplex-recorded as information on the shape, number and image-forming distance of the reproduced image of the hologram, each of which is multiplex-recorded on the hologram. Is a method for reading information on a card in which reproduced images are formed at different distances in the same direction, the hologram is illuminated with reproduced light, and a light receiving unit on which the reproduced image is projected is moved in a predetermined diffraction direction from the hologram surface. An information reading method is characterized in that information is read by recognizing a reproduced image reproduced at a plurality of image forming points.