JPH0792637B2 - Card and recording / reproducing method of the information - Google Patents

Description

The present invention relates to a technology for preventing counterfeiting of cards such as ID cards, credit cards, bank cards, check cards, and IC cards, and particularly card-specific information for preventing counterfeiting. The present invention relates to a card for recording as a reproduced image of a hologram and a recording / reproducing method of the information.

(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. Information recorded in this way is often erased and confused due to the effect of an external magnetic field, or is easily rewritten and abused by commonly available magnetic read / write devices to improve information security. 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, reproducing light is applied to a hologram provided on the surface of a card, and a spot developed at an arbitrary point on the line of reflected light or transmitted light is read as information. However, 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, and an object of the present invention is to provide a card having card-specific information that cannot be easily counterfeited and a recording / reproducing method of the information.

(Outline of the Invention) If the present inventors record information to be recorded not as a spot of a reproduced image of a hologram but as pattern information based on a specific shape of the image forming the reproduced image and the number and arrangement thereof, The present invention has been accomplished by finding that the recorded information cannot be easily read and cannot be rewritten.

That is, in the card of the first invention of the present application, the card-specific information recorded on the card is composed of a reproduced image of the hologram formed on the reproducing surface having a specific distance from the hologram, and constitutes the reproduced image of the hologram. It is characterized in that it is recorded on a hologram as pattern information according to the shape of the image, the number of images and the arrangement of the images, and is provided on the card substrate. Further, the information recording / reproducing method of the card of the second invention of the present application is the card The card-specific information recorded on is composed of a reconstructed image of the hologram formed on the reproduction surface having a specific distance from the hologram, and the shape of the image constituting the reconstructed image of the hologram, the number of images, and an array of images. Is recorded as pattern information on the hologram, and information is read by illuminating reproduction light on the hologram provided on the card. It is characterized in.

(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.

The hologram 10, the hologram 20, and the hologram 30 are arranged at the array position according to the card-specific information recorded on the card substrate 1.
Is provided. These holograms are
Based on a transparent original for hologram creation, in which card-specific information is represented as pattern information consisting of the number of images and an array of images, a reproduction image composed of those images is formed so as to form at a specific position. The holograms are relief holograms, and each hologram forms a reproduced image from the hologram surface in the same reproducing surface.

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. or,
A hologram in which a rainbow hologram for the purpose of decoration is multiplex-recorded can be used as the above hologram, and in that case, a reproduced image of the rainbow hologram can be obtained by white 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 the roll of the transfer sheet having one kind of reproduced image pattern is prepared as I roll, even if the number of holograms provided on the card is J, different card unique information can be obtained by the continuous transfer method. It is possible to easily manufacture I ^J cards having

FIG. 2 is a sectional view of the hologram transfer sheet used in the present invention.

On the base film 51, the protective layer 52 and the hologram forming layer 5
3. The hologram transfer sheet 50 is formed by sequentially stacking the reflective metal thin film layer 54 or the hologram effect layer 55 and the adhesive layer 56.

The base film 51 serves to increase 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, polyacrylate, and poly. Plastic films such as vinyl chloride, polyurethane, polycarbonate, polymethacrylate, etc., 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 53.
Is a material that protects the
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 thermoformed at the time of molding (reproduction) of the hologram, and at the time of forming the hologram, that is, at the time of processing, heat pressure and an adhesive at the time of processing. 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. In particular, when productivity is taken into consideration, a resin curable with ultraviolet rays or electron beams is suitable.

Specifically, for example, methyl (meth) acrylate,
[Note that the term (meth) acrylate is meant to include 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 or electron beam curable resin having thermoformability, a method (a) to be described later for 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) Sulfone group-containing monomer: 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 copolymerizable monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth). ) Acrylate, isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate and the like.

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 measured by a haze meter of 10% or less. For example, a 1-2 type azo metal complex salt dye, a 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, Ge,
Metals such as Al, Mg, Sb, Pb, Pd, Cd, Bi, Sn, Se, In, Ga, and Rb, and oxides and nitrides thereof are used alone or in combination of two or more. Al among these metals,
Cr, Ni, Ag, Au, etc. are particularly preferable, and the film thickness is 10 to 1
0,000Å 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 transparent thin film layers having different refractive indices in this way,
The hologram is expressed and the lower layer is not hidden.

In the case of the latter, although it is a reflective metal thin film layer, its thickness is
Since it is 200 Å or less, it has a large light wave transmittance, and therefore exhibits a hologram effect-producing action and a non-concealing action for the transparent portion. 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 shown in Table 2. 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 Materials n CuCl 2.0 CuBr 2.2 CaAs 3.3 to 3.6 CaP 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 Ratio: 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 the fifth
In the table, the above n and K are shown together.

Other materials include Sn, In, Te, Fe, Co, Zn, Ge, P
b, 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 and the like can 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 Pinyl butyral resin 1.48 Vinyl formal resin 1.50 Polyvinyl chloride 1.53 Polyester resin 1.55 Formalin phenate 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,
Further, the vertical positional relationship of each layer in the layer configuration is arbitrarily selected.

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 The transparent region of the material forming the thin film may be used, and in general, 10 to 10000A is preferable, and 100 to 5000A is more preferable.

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 method, 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 can be used. The thin film layer is (6) above.
In the case of the above material, 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 its film thickness is 0.1 to 50 μm, preferably 1 to 1
It is preferably 0 μm.

Further, in the hologram transfer sheet 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, vinyl An overprint made of resin or the like may be provided between the hologram forming layer 53 and the protective layer 52. Further, the hologram forming layer 53 and the adhesive layer 56
An anchor layer made of a vinyl chloride-vinyl acetate copolymer, an acrylic resin, a urethane resin or the like may be provided between the hologram forming layer 53 and the adhesive layer 56 in order to improve the adhesiveness between the hologram forming layer 53 and the adhesive layer 56.

Hologram transfer sheet 50 formed as described above
, The adhesive layer is overlapped with the card substrate surface so that the adhesive layer is in contact with the card-specific information, the base film is peeled off after heating and pressing, and the hologram is transferred to the card to obtain the card of the present invention. You 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, a method of recording / reproducing information on / from the card of the present invention will be described.

FIG. 3 is an explanatory view showing an example of a method of recording information in the hologram of the present invention.

In the figure, 101, 102, and 103 are images recorded on the hologram 10, respectively, and the reproduced image of the hologram 10 is configured by the shape of these images, the number of images, and the array of images.

Here, the shape of the image is a shape obtained by combining quadrangles, and for example, in the image 101, it is a rectangular shape in which two quadrangles are arranged side by side. The number of images is the number of images recorded on the hologram, for example, the hologram 10
Then, since the images 101, 102, and 103 are recorded, the number of images is three. Furthermore, the array of images is the order in which the images are lined up, and in hologram 10, three images are
101, image 102, and image 103 are arranged in this order.

Similarly, 201 and 202 are images recorded on the hologram 20, respectively, and 301, 302, 303, 304 are images recorded on the hologram 30, respectively.

The reproduced image of each hologram is composed of an image that is a collection of squares. Pattern information based on the shape of these images, the number of images, and the array of images is, for example, a hologram.
A PIN is recorded in the reproduced image of 10, the name of the cardholder is recorded in the reproduced image of the hologram 20, and the check digits thereof are recorded in the reproduced image of the hologram 30.

Such a hologram is formed on the card at an array position corresponding to the card-specific information, and information recorded by the reproduced image and information recorded by the positional relationship of each reproduced image with respect to the card (for example, in the present embodiment, The hologram 10, the hologram 20, and the hologram 30 are provided from the right end of the card, and this array means a specific card issuing place. ]
One card-specific information that is combined with and is recorded on the card.

In the present invention, since information is recorded as described above, the number of holograms provided on the card may be one or more, the formation position is not limited, and the reproduced image thereof is formed. The shape of the image, the number of images, and the arrangement of the images are not limited. For example, if the pattern of the reproduced image is recorded as a bar code, it can be handled as bar code information such as JAN code and NW-7 code.

As described above, the hologram is reproduced on the surface of the card to record the unique information on the card.However, the recorded unique information does not show the reproduced image of the hologram in white light, and therefore the card and the thin metal or plastic film are simply It only looks like what's on the card.

However, if the entire surface of the hologram formed on the surface of the card substrate is irradiated with laser parallel light or the like, the hologram forms a reproduced image, and a reproduced image equivalent to a transmission original is projected on the light receiving portion provided at a specific position. Or, if the hologram is irradiated with a beam of laser light or the like on a part of the hologram, the reproduced image of the hologram becomes a divergent image and is projected on the light receiving portion at a desired position as a similar figure to the transmissive original to read the card unique information. The authenticity of the card can be determined.

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 to irradiate the entire surface of the hologram.

When the laser beam oscillated from the light source 60 is expanded to a required size by the expansion optical system and irradiates the entire surface of the hologram 10 on which the card-specific information on the card is recorded, the hologram forms an image, which is used when the hologram is photographed. An image equivalent to the image forming the recorded reproduction image is projected on the light receiving unit 60 provided at the position of a specific distance depending on the conditions, and the pattern information by the shape of these images, the number of images, and the array of images. The position information of the reproduced image with respect to the card is read. Next, the same operation (not shown) is sequentially performed on the hologram 20 and the hologram 30, and the respective information is read, whereby the card-specific information recorded on 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 it consists of a reconstructed image of the hologram that is imaged on the reconstructed surface having a specific distance from the hologram, and is recorded on the hologram as pattern information depending on the shape of the image, the number of images, and the array of images that make up the reconstructed image of the hologram. , If the recorded information uses a light source whose wavelength or incident angle is different from that of the light source at the time of recording, the shape and the image formation position of the reproduced image of the hologram are changed, and the recorded information is read as different information or the reproduced image is changed. Since it becomes unclear and unreadable, it is difficult to read unless a light source similar to the light source used for recording is used to illuminate from the same angle as the incident angle of the reference light during recording, and the hologram Due to the redundancy of the above, in order to modify the reproduced image of the hologram, each interference fringe must be re-engraved, and it is substantially impossible to modify. Has a very high forgery or tampering prevention properties.

Further, according to the present invention, the information to be recorded / reproduced consists of a reconstructed image of the hologram formed on the reproduction surface having a specific distance from the hologram, and the shape of the image forming the reconstructed image of the hologram and the image Since the image is the pattern information based on the number and the image arrangement, the amount of information to be recorded remarkably increases, unlike the conventional recording and reproduction of information by the spot.

Furthermore, the card of the present invention can be easily mass-produced because information can be easily added by a transfer method using a hologram transfer sheet.

[Brief description of drawings]

FIG. 1 is a plan view of a card of an embodiment of the present invention, FIG. 2 is a sectional view of a hologram transfer sheet used in the present invention, FIG. 3 is an explanatory view of an information recording method of the present invention, and FIG. 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, 103 ... Respective images of hologram 10 201, 202 ... Respective images of hologram 20 302, 302, 303, 304 ... Respective hologram 30 images 60 ... Hologram reproduction light source 70 ... …Light receiving section

Claims (7)

[Claims] 1. Card-specific information recorded on a card comprises a reconstructed image of a hologram formed on a reproduction surface having a specific distance from the hologram, and the shape and image of the image forming the reconstructed image of the hologram. Card recorded on a hologram as pattern information according to the number of images and an array of images, and provided on a card substrate. 2. The card according to claim 1, wherein the hologram is provided on a card substrate at an array position based on the card unique information. 3. The card according to claim 1, wherein said hologram is a transparent hologram. 4. A card according to any one of claims (1) to (3), characterized in that the hologram is a combination with a rainbow hologram for the purpose of decoration. 5. The card according to any one of claims (1) to (4), wherein the reproduced image of the hologram is a bar code. 6. The card-specific information recorded on the card comprises a reconstructed image of the hologram formed on a reproduction plane having a specific distance from the hologram, and the shape and image of the image forming the reconstructed image of the hologram. The information recording / reproducing method for a card is characterized in that the information is recorded on the hologram as pattern information according to the number of images and an array of images, and the information is read by illuminating the hologram provided on the card with reproduction light. 7. The method for recording / reproducing information on a card according to claim 6, wherein the information on the array position on the card of the hologram for reproducing the image is also card-specific information.