JPH06332379A - Forgery preventive seal and collation method therefor - Google Patents

Abstract

PURPOSE:To provide the seal having high safety for prevention of forgeries, counterfeits and replicated goods. CONSTITUTION:A Fourier transform hologram to be reproduced by laser beam alone is formed on one surface of a transmissive resin base material 2 and a vapor deposited metallic film layer 3 is formed as a reflection surface on this hologram surface 6. A microcapsule layer 4 which releases coloring agents when cut and an adhesive layer 5 which peels the vapor deposited metallic film layer 3 from the hologram surface 6 according to unsealing patterns when this adhesive layer are peeled from the adhesive surface are successively formed on the vapor deposited metallic film layer 3. A surface protective layer 1 consisting of a transparent resin is formed on the other surface 16 of the base material 2. The forgery and alteration are prevented by the respective layers alone or the synergistic effect thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterfeit prevention seal used for distinguishing a counterfeit (for example, a counterfeit product; a modified product; a duplicate copy product) from a genuine product, and a method for verifying the seal.

[0002]

2. Description of the Related Art In order to distinguish a genuine product from a counterfeit product, that is, a counterfeit product, a modified product or a duplicate product, for example, a product name, a producer's name, a seller's name, a manufacturing date, a manufacturing date, etc. Affixing a sticker with a number, certification mark, etc. printed on it, and distinguishing whether the sticker is affixed, or peeled off or opened, is used to distinguish the genuine article from the fake one. There is.

However, since such a sticker can easily be made into a counterfeit by printing or the like, the counterfeit sticker can be attached to a counterfeit product instead of the real sticker, or can be peeled off or opened. There is a problem that counterfeiting, alteration, or copying can be performed relatively easily by using it instead of the above seal.

As one solution to this problem, for example, a hologram sheet having a so-called rainbow hologram for reproducing a three-dimensional (3-D) image by natural light is attached to a part of the seal, and the sheet is attached. It has been difficult to counterfeit by distinguishing whether it is a fake or a genuine article depending on the presence or absence of.

[0005]

However, in the above-mentioned sticker to which the hologram sheet is attached, since the rainbow hologram is widely used, a similar one can be easily forged.

It is also conceivable that at the time of alteration, only the hologram sheet is cut off from the seal that has been peeled off or opened, the cut genuine sheet is attached to a counterfeit seal, and the seal is used after alteration.

Further, if the same hologram sheet is used for a sticker with a low unit price, the sticker is peeled off from the cheaper unit price, and the peeled sticker becomes a counterfeit product which sells at a high unit price. It is also possible to divert.

[0008] As described above, the sticker to which the hologram sheet is attached cannot completely prevent alteration or forgery, and is not a safe mechanism for authenticating the sticker.

Therefore, an object of the present invention is to prevent the seal from being reused by making it possible to determine that the seal has been peeled off, prevent faking of the seal from being easily made, and at the same time confirm the validity of the seal. It is to be able to do it surely.

[0010]

In order to solve the above-mentioned problems, according to the present invention, a forgery prevention seal is formed on one surface of a transparent resin substrate by a hologram surface by a Fourier transform hologram, and the hologram surface is formed on the hologram surface. The adhesive layer is formed, and the surface protective layer of transparent resin is formed on the other surface of the permeable resin substrate.

At this time, the hologram surface is repeatedly recorded by changing the recording angle of the Fourier transform hologram, the recording is performed from a plurality of directions, the surface protective layer is formed of a hard transparent resin, and the hologram is recorded. Forming a metal vapor deposition film layer between the surface and the adhesive layer, and changing the degree of adhesion of the adhesive layer to the metal vapor deposition film layer according to an arbitrary pattern, and further, the metal vapor deposition film layer and the adhesive layer Alternatively, a microcapsule layer having microcapsules containing a marking colorant therein may be provided, or the microcapsule layer may be obtained by sealing the marking colorant with a resin.

On the other hand, the forgery prevention seal is provided with a laser oscillator for irradiating a laser beam to the outside of the case through a transparent portion of the case in a case having a partially transparent portion, and the laser oscillator irradiates the seal. A screen for receiving reflected light of laser light through the transparent portion is provided in the case, the transparent portion of the case is opposed to the seal, and laser light is irradiated to form a hologram by reflected light from the seal. It is possible to perform a collating method of displaying on the screen and determining the correctness of the sticker by the display.

At this time, an optical sensor for detecting the reflected light of the laser light is provided in the case, and the detection output of the optical sensor is the reflected light of the laser light from the seal (in this case, the reproduced hologram image is valid. It includes a discriminating means for discriminating whether or not there is, and a notifying means for notifying the discrimination result of the discriminating means. The reflected light from the seal is detected by the optical sensor and discriminated by the discriminating means. , Indicating whether the seal is correct or not, and disposing a laser recording paper sensitive to the reflected light of the laser light in the case, and recording a hologram by the reflected light from the seal on the laser recording paper. Then, the record may be used to determine whether the seal is correct or not.

Further, at this time, it is also possible to irradiate the seal with diffused coherent light and reproduce a hologram by the reflected light directly on the retina to visually determine whether the seal is right or wrong.

The image or pattern forming the hologram surface may be, for example, a character, a figure, or a bar code label.

[0016]

In the anti-counterfeiting seal constructed as described above, each layer forming the seal prevents the counterfeiting, alteration, duplication, etc. of the article to which the seal is attached in synergistically.

That is, the seal can be attached to any surface or surface of an article or the like by the adhesive layer.

The hologram surface formed by the Fourier transform hologram has an overwhelmingly high recording density of interference fringes due to the laser light (2000 to 3000 lines / mm) as compared with the conventional rainbow hologram. For this reason, it is difficult to make a fake, and reproduction of the hologram is also performed by making laser light incident from the seal surface, reflecting the incident laser light on the adhesive surface, and receiving the reflected light. Therefore, the validity of the seal is confirmed by the hologram reproduced by irradiating the laser beam and the reproduced image of the hologram.

At this time, in the case where the hologram surface is recorded by changing the recording angle of the Fourier transform hologram a plurality of times and the recording is performed from a plurality of directions, when the seal is vertically irradiated with the laser beam, the laser beam is emitted. Holograms having different reproduction angles determined by the wavelength of light and the recording angle of the hologram are reflected in a plurality of directions corresponding to the recording angle and the recording direction. Therefore, the collation using the hologram can be easily performed.

The surface protective film protects the surface of the base material. In particular, in the case where the protective layer is formed of a hard resin, when the seal is cut, the cut surface becomes blunt, so that it can be notified that the seal has been cut.

Further, in the case where the metal vapor deposition film layer is formed between the hologram surface and the adhesive layer, the clarity of the hologram reproduced by reflecting the laser light incident from the hologram surface is improved and at the same time the laser light is emitted. It is possible to use by sticking the above-mentioned seal on the adhesive surface on which is absorbed.

Further, at this time, when the adhesive layer is adhered to the adhesive surface, the metal vapor deposition film layer is peeled off from the hologram surface according to the pattern of the adhesive strength when the sticker that is pasted is peeled off. The pattern is displayed on the sticker and the adhesive surface. Therefore, reuse of the seal can be prevented.

The microcapsule layer or colorant layer is
Due to alteration, etc., when the seal is cut or opened, the colorant-sealed microcapsules or the resin breaks,
The colorant can be released to indicate the fact of cutting or opening.

On the other hand, as a method of collating the above forgery prevention seal, the transparent portion of the case is brought into contact with the seal, the seal surface is irradiated with laser light, and the laser reflected light from the seal surface is transmitted through the transparent portion to the case. In the method of displaying on the screen, the hologram can be collated by visually confirming the reproduced hologram on the screen.

At this time, in the case where the case is provided with an optical sensor, a discriminating means and an informing means, and the collating is performed by the informing of the informing means, the valve valve means discriminates whether or not the hologram image is reproduced and informs the same. The collation can be performed by confirming.

On the other hand, in the collation method using the laser recording paper, since the reconstructed hologram is left as a record on the laser recording paper, the collation can be performed by confirming the remaining recording.

Further, in the method in which the hologram is directly reproduced by irradiating diffused coherent light, the hologram reproduced directly on the retina of the eye can be reproduced without using a screen or laser recording paper. By confirming, the collation can be performed.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

The forgery prevention seal L ₁ of the first embodiment shown in FIG. 1 has a surface protective layer 1, a permeable resin base material 2 and an adhesive layer 5.
It consists of

The forgery prevention seal L ₂ of the second embodiment shown in FIG. 2 includes a surface protective layer 1, a permeable resin substrate 2, a metal vapor deposition film layer 3, a microcapsule layer 4, and an adhesive layer 5. And the metal vapor deposition film layer 3 and the microcapsule layer 4 are formed between the permeable resin substrate 2 and the adhesive layer 5 of the anti-counterfeiting seal L ₁ of the first embodiment. Is.
Therefore, here, the forgery prevention seal L of the second embodiment is used.
_The description of ₂ will also serve as the description of the forgery prevention seal L ₁ of the first embodiment.

The resin substrate 2 is, for example, a sheet-shaped transparent thermoplastic resin, and a hologram surface 6 is formed on one surface thereof. Further, aluminum or the like is vacuum-deposited on the hologram surface 6 to form a reflection film by the metal vapor-deposition film layer 3 to improve the reflectance.

On the hologram surface 6, identification holograms by Fourier transform holograms are recorded over the entire surface, and the recording angles are changed, and recorded from a plurality of directions.

Here, the Fourier transform hologram will be briefly described.

In the Fourier transform hologram, as shown in FIG. 3, the laser light is divided into two, one is used as the reference light A, and the other B is formed with hologram data via a diffusion plate (for example, frosted glass) 7. The original plate 8 for photographing is irradiated. Then, the object light transmitted through the original plate 8 for photographing is irradiated with the reference light A through the Fourier transform lens 9 onto the photosensitive surface of the recording original plate 10 on which the photoresist layer is formed, and is diffused by the diffusion plate 7. A plurality of holograms (2000 to 3000 / mm) generated by the laser light are recorded on the recording original plate 10, and a large number of the same holograms are recorded on the photosensitive surface, as shown in FIG.

The hologram surface 6 is the original recording plate 1.
0 is subjected to photo-etching treatment and vapor deposition treatment of Cu / Ag, etc., a nickel plating layer is formed on the vapor deposition surface, and the metal layer peeled from the recording original plate 10 is applied to the mold.
The thermoplastic resin is hot-pressed, and aluminum is vapor-deposited on the hot-pressed thermoplastic resin.

In this Fourier transform hologram, as shown in FIG. 5, when the laser beam C for reproduction is irradiated perpendicularly to the hologram surface, the position of the hologram reproduced at that time,
The magnitude, and its angle, is given by the following equation:

Sin θ _i = ± λ _c / λ ₀ × sin θ ₀ L1 = F1 × M × λ ₀ / λ _c where F1: focal length during recording L1: distance between hologram and screen M: size of reproduced image λ ₀ : Laser wavelength for recording λ _c : Laser wavelength for reproducing θ ₀ : Angle for recording θ _i : Angle for reproducing As is clear from the above formula, the angle of the hologram to be reproduced is the angle for recording. It is uniquely determined by θ ₀ and the laser wavelengths (λ ₀ , λ _c ) during recording and reproduction.

Therefore, as shown in the schematic diagrams of FIGS. 6A and 6B, the seal L ₂ changes the recording angle θ ₀ over the entire surface of the hologram surface 6 from a plurality of directions α _0. Since the hologram is formed by the recorded recording original plate 10, when the laser light is perpendicularly incident on the hologram surface 6, holograms having a plurality of angles are symmetrical as shown in FIGS. 7 (a) and 7 (b). , Also played in multiple directions. Therefore, for example, the hologram can be reproduced by arranging the screen 11 at any one of the above positions, so that the hologram can be easily reproduced on the screen without strict alignment of the reproducing screen.

A microcapsule layer 4 is formed on the metal vapor deposition thin film 3 formed on the hologram surface 6.

The microcapsule layer 4 is formed by coating the metal vapor deposition film layer 3 with the adhesive and the microcapsules 12 contained therein by coating a coloring agent such as ink or dye. An adhesive layer 5 is formed on the surface 4.

The adhesive layer 5 is, for example, as shown in FIG.
The microcapsule layer 4 bonded to the metal vapor-deposited film layer 3 is composed of a portion 13 for strongly adhering the adhesive surface and a portion 14 for not strongly adhering the seal L ₂ to the adhesive surface. The strongly adhering portion 13 adheres to the adhering surface and separates the microcapsule layer 4 and the metal vapor deposition film layer 3 from the hologram surface 6. Therefore, the metal vapor deposition film layer 3
A white pattern is displayed on the peeled-off seal L ₂ , and a pattern of the metal vapor deposition film 3 is left on the adhesive surface. In this embodiment, as shown in FIG. 8, the "open" character pattern 15 is formed so as to form a strong adhesive portion 13.

On the other hand, the other of the resin base material 2, that is,
A surface protection layer 1 made of, for example, a polyethylene terephthalate (commonly known as PET) film, which is transparent and has good transparency, is formed on the surface 16 on which the hologram is not formed to protect the surface of the base material 16.

Printing can be performed on the surface protective layer 1, and for example, a product name, a number, an authentication mark or the like can be printed as in the case of a conventional sticker.

The seal L ₁ or L ₂ configured as described above is used for articles for which it is desired to prevent forgery, alteration, copying, etc.
The adhesive layers 5 of the seals L ₁ and L ₂ are abutted and attached. When the seals L ₁ and L ₂ attached in this way are irradiated with laser light, holograms are reproduced by the reflected light and the validity is verified. At this time, in the seal L ₁ of the first embodiment, the irradiated laser light is reflected by the adhesive surface, while in the seal L ₂ of the second embodiment, it is reflected by the metal vapor deposition film layer 3.

Further, when the seal L ₂ is disconnected, to color the seal L ₂ out colorant leaks broken microcapsule layer 4, re-use of the presence or absence of cutting and sealing L ₂ is prevented To be done.

Further, when the seal L ₂ is peeled off, the metal vapor deposition film layer 3 corresponding to the character pattern 15 in which the adhesiveness of the adhesive layer 5 is strengthened remains on the adhesive surface, and the peeling mark 13 "open" is displayed. The presence or absence of opening is displayed. on the other hand,
Said also to seal L ₂ is displayed, which is the white of "opening" re-use of the seal L ₂ is prevented appear.

It should be noted that since the seal L ₂ uses a very inexpensive resin for the base material 2, it costs a lot to manufacture the mold.
When mass-produced, it can be manufactured at low cost.

The above-mentioned seal L ₂ is processed into various shapes, for example, by attaching release paper to the adhesive layer 5 and similar to a conventional seal or the like. Then, when used, the release paper is peeled off and used as a sticker, or as shown in the third embodiment of FIG. It is also possible to use it by forming it into a sheet-shaped sheet d and pasting the sheet d by thermocompression bonding.

The fourth embodiment shown in FIG. 10 uses a colorant layer 4'in which a colorant such as ink or dye is sealed with a resin in place of the microcapsule layer 4 described above. also, similarly to the microcapsule layer 4, when the unnecessary pressure and cutting is applied, the colorant in the resin is crushed is released, coloring the seal L _3, seal L ₃ It informs about the prevention of reuse and the fact that the seal L ₃ is opened.

The colorant layer 4 may be formed over the entire surface of the seal L ₃ as shown in FIG.
As shown in the fifth embodiment, the colorant may be formed along the outer circumference to reduce the amount of the colorant used.

In the sixth embodiment shown in FIG. 12, a hard transparent resin is used for the surface protective layer 16, and when the seal L ₄ is cut by this method,
The cut surface is raised to indicate that the seal L ₄ has been cut.

Next, a method of checking with a hologram whether or not this seal is valid will be described.

For this collation, for example, FIG. 13 or FIG.
The transparent cover 21 is provided at the front end of the case 20 shown in the seventh embodiment.
A handy type collating device 22 covered with is used.

The collation device 22 has a semiconductor laser oscillator 24 using a short focus lens 23 as a collimator lens in the case 20, and a battery 25.
A screen 26 is provided on the case 20 so as to face the transparent cover 21.

[0055] Therefore, the laser light oscillated from the laser oscillator 24 is incident perpendicular to the seal L _2, the light reflected from the sealing L ₂ side reaches the screen 26 through the transparent portion 21, the hologram is Is played.

At this time, for example, even when the oscillated laser light enters the eye, it is safe since the laser light is diffused and the energy density is weakened beyond the focus of the short focus lens 23.

In the collating device 22 of the seventh embodiment, the screen 26 is provided so as to face the transparent cover 21, but it is not necessary to provide the screen 26 so as to face the transparent cover 21 as described above. For example, a half mirror ( It may be provided at another position by using (including a prism) or the like.

As shown in FIG. 13, the screen 26 is provided with a CCD image sensor 27, and the case 20 has a detection discrimination circuit 28 connected to the CCD image sensor 27 and a detection discrimination circuit thereof. 28
A notification buzzer 29 connected to the above is provided.

Therefore, when the CCD image sensor 27 detects the hologram reproduced on the screen 26 and the detected image matches the pre-registered collation data, the detection discrimination circuit 28 activates the buzzer 29 and the seal L Notify that ₂ is valid.

For this detection, instead of the CCD image sensor 27, for example, a diode photosensor such as APD is used, and the detection discrimination circuit 28 amplifies the photosensor output to discriminate the presence or absence of the hologram on the screen. The buzzer 29 may be operated by the discrimination output of the detection discrimination circuit 28 to inform that the hologram has been reproduced on the screen 26.

In the embodiment, the CCD image sensor 27 is provided on the screen 26 and the hologram reproduced on the screen 26 is detected. However, the present invention is not limited to this. 27 may be made to reproduce.

A laser-sensitive paper 30 which is sensitive to laser light is arranged on the screen 26.

This laser-sensitive paper 30 is provided with a half mirror 31 facing the transparent portion 21 in the case 20, as shown in FIGS. 13 and 14, in addition to being arranged on the screen 26 as described above. The hologram of the reflection image of the half mirror 31 may be directly recorded on the laser photosensitive paper 30.

It should be noted that the collating device 22 is provided with an operation timer circuit, and, for example, when the reflected light does not enter for a certain time by the timer circuit, the collating device 28 is turned off,
The battery 25 may be prevented from being consumed by forgetting to turn off the switch.

This embodiment is constructed as described above, and its operation will be described below.

At this time, the seal L ₂ used has a second
The seal L _{2 of the} embodiment will be used.

First, by using a Fourier transform hologram on the hologram surface 6, the recording angle is changed over the entire surface, and the seal L ₂ on which the hologram for discrimination is formed is prevented from being counterfeited, altered or copied a plurality of times from each direction. Attach it to the desired item. Then, when confirming whether the article is a genuine article, a copy article, or a modified article, first, it is confirmed whether or not there is an abnormality in the appearance of the affixed seal L ₂ .

That is, it is confirmed whether the seal L ₂ is not colored or whether the opening mark 13 "open" is displayed on the seal L ₂ . In this case, if the seal L ₂ is colored, the seal L
₂ of the microcapsule layer 4 of the microcapsule 12,
It shows that the colorant was breached by cutting or cutting, and that the colorant oozes out, and that alteration or the like was performed.

[0069] On the other hand, the case where peeling mark 13 of "opening" the seal L ₂ is displayed, the seal L ₂
Was once peeled off, and the metal vapor-deposited film 3 was peeled off at that time. Therefore, it can be seen that the seal L ₂ was peeled off and diverted from another article as described above.

[0070] In addition to the seal L _2, if there is no abnormality in appearance, such as described above, to determine whether the seal L ₂ is legitimate by using the verification device 22 is now. In this case, if the laser recording paper 30 is arranged in the collating device 22, the recording can be taken.

[0071] That is, contact the transparent portion 21 of the verification device 22 to the seal L _2, while viewing the laser light passing through the transparent portion 21, the incident perpendicularly to the laser light to the seal L _2, the seal L ₂ Screen 2 by reflected light from
Since the hologram is reproduced on the screen 6, the seal L ₂ is collated with the reproduced hologram.

At this time, since the hologram is recorded on the hologram surface 16 a plurality of times by changing the angle, it is not necessary for the collating device 22 to hold it exactly perpendicular to the seal L ₂ surface, and either Even if the angle is slightly deviated in the direction of, the hologram is reproduced on the screen 26. Therefore, the collation can be performed even in an unstable state in which the collation device 22 and the article to which the seal L ₂ is attached are manually supported.

At this time, the detection discrimination circuit 28 discriminates whether the hologram reproduced on the screen 26 is a discrimination hologram or not, and the buzzer 29 informs the hologram. Further, the hologram is recorded and stored by the recording paper 30 which is sensitive to laser light.

FIG. 15 shows the seal L ₂ as an eighth embodiment.
Another matching method will be described.

In this collation method, the laser oscillator 24 or the red LED (for example, wavelength λ = 670 nm) irradiates the seal L ₂ with diffused coherent light having a large beam spot to record on the hologram seal. The image of the hologram can be visually confirmed.

In this case, the hologram is not reproduced by natural light and is reconstructed only by the coherent light of the wavelength at which the hologram is recorded on the sheet, so that the safety is high.

As described above, in this collating method, since the hologram recording pattern can be directly confirmed with the naked eye, no special device is required, and the laser light reflected on the sticker L ₂ can be directly visually observed. It can be confirmed even under bright sunlight such as sunlight.

Table 1 summarizes the characteristics of the matching methods of the seventh and eighth embodiments. Similarly, for better understanding, the forgery prevention seals L _{1 to} L ₄ described in the first to sixth embodiments are schematically shown in FIG.

[0079]

[Table 1]

[0080] Thus, and its verification process the forgery-proof seal, if the seal L ₁ ~L ₄ is valid, or, those seal L ₁ ~L ₄ is subjected to wrought You can tell if there is, so
It is easy to check for unauthorized use, and its hologram is
High-density recording with laser light (2000-3000 lines / m
Forgery is difficult because it is m).

For this reason, for example, ROM, RAM software modification prevention seal in computer equipment. (Pachinko machines, automobile engines) ・ Branded products (watches, jewelry, precious metals, bags, neckties, lighters, sports equipment, etc.) ・ Genuine parts (automobiles, tires, engine control systems, motorcycles, etc.) ・ Gold, silver, and processed products (Pachinko gifts) -Banknotes, securities, passbooks, stamps, stamps, stamps, prepaid cards, credit cards, cash cards, etc.- Guarantee of origin (rice, liquor, fruits, imported liquor, vegetables, etc.)-Passport, Alien Registration Card, Driver's license, bicycle registration certificate, insurance certificate, etc. ・ Rental CD, VTR, tape, book, FDD, LD,
It is most suitable for use as a seal or label for preventing forgery, alteration, and duplication of GAME software etc.

[0082]

[Effect] The present invention is configured as described above, and since it is extremely difficult for each layer to make a counterfeit seal or to work on the seal in a synergistic manner, it is possible to counterfeit an article to which the seal is attached. It can prevent alteration and duplication.

Further, in the case where the hologram surface is repeatedly recorded by changing the recording angle of the Fourier transform hologram and the recording is performed from a plurality of directions, a plurality of holograms are reproduced in a plurality of directions.

Therefore, at the time of collation, it is sufficient to confirm any one of the plurality of reproduced holograms, which facilitates the collation work.

On the other hand, in the collating method in which the laser oscillator and the screen are provided in the case, the seal can be collated by looking at the screen of the case.

Further, in the method in which the case is provided with the optical sensor, the detecting means, and the notifying means, the hologram is confirmed by the detecting means simultaneously with the visual check, and the double check is performed, so that the reliability is improved.

At this time, in the case where the hologram is recorded on the laser recording paper, the recording can be left at the same time as the confirmation, so that the certainty and workability of the confirmation work are improved.

Further, in the collation method in which the diffused laser light is irradiated and the hologram by the reflected light is directly confirmed with the naked eye, a special device for collation is not required and the collation can be performed even in a bright place. .

[Brief description of drawings]

FIG. 1 is a sectional view of a forgery prevention seal according to a first embodiment.

FIG. 2 is a sectional view of a forgery prevention seal according to a second embodiment.

[Fig. 3] Action diagram of Fourier transform hologram

[Fig. 4] Action diagram of Fourier transform hologram

FIG. 5: Action diagram of Fourier transform hologram

6A and 6B are action diagrams of a Fourier transform hologram.

7A and 7B are action diagrams of a Fourier transform hologram.

FIG. 8 is a schematic diagram of an adhesive layer

9A is a front view of the third embodiment, and FIG. 9B is a sectional view of the same.

FIG. 10 is a sectional view showing a fourth embodiment.

FIG. 11 is a perspective view showing a fifth embodiment.

FIG. 12 is a perspective view showing a sixth embodiment.

FIG. 13 is a partial cross-sectional perspective view of a collating device according to a seventh embodiment.

FIG. 14 is a partial cross-sectional perspective view of another matching device according to the seventh embodiment.

FIG. 15 is an operation diagram showing an eighth embodiment.

FIG. 16 is a schematic diagram showing the forgery prevention seals of the first to sixth embodiments.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Surface protective layer 2 Transparent resin base material 3 Metal vapor deposition film layer 4 Microcapsule layer 5 Adhesive layer 6 Hologram surface 20 Case 21 Transparent part 22 Collation circuit 23 Short focus lens 24 Semiconductor laser 26 Screen 27 CCD image sensor 28 Detection discrimination Circuit 29 Buzzer 30 Laser recording paper L _{1 to} L ₄ Counterfeit prevention seal

Claims (11)

[Claims] 1. A hologram surface formed by a Fourier transform hologram is formed on one surface of a transparent resin base material, an adhesive layer is formed on the hologram surface, and the other surface of the transparent resin base material is formed. Anti-counterfeit seal with a surface protective layer made of transparent resin. 2. The hologram surface of the resin substrate is repeatedly recorded by changing the recording angle of the Fourier transform hologram,
2. The anti-counterfeit seal according to claim 1, wherein the recording is formed by recording from a plurality of directions. 3. The anti-counterfeit seal according to claim 1, wherein the surface protective layer is formed of a hard transparent resin. 4. The forgery prevention seal according to claim 1, wherein a metal vapor deposition film layer is formed between the hologram surface and the adhesive layer. 5. The forgery prevention seal according to claim 4, wherein the degree of adhesion of the adhesive layer to the metal vapor deposition film layer is changed according to an arbitrary pattern. 6. A microcapsule layer having microcapsules containing a coloring agent for marking is formed between the metal vapor deposition film layer and the adhesive layer.
Or the anti-counterfeit seal described in 5. 7. The anti-counterfeit seal according to claim 6, wherein a colorant layer in which a marking colorant is sealed with a resin is formed in place of the microcapsule layer. 8. A laser oscillator for irradiating a laser beam to the outside of the case through a transparent portion of the case is provided in the case having a partially transparent portion, and the case is provided with a reflection of the laser beam emitted by the laser oscillator. A screen for receiving light through the transparent portion is provided, the transparent portion of the case is opposed to the seal, and laser light is radiated to display a hologram by reflected light from the seal on the screen. A method of collating the anti-counterfeit seal to determine whether the seal is correct or not by the display. 9. An optical sensor for detecting reflected light of laser light in the case, a discriminating means for discriminating whether or not a detection output of the optical sensor is reflected laser light from the seal, and a discrimination result of the detecting means. A transparent portion of the case is opposed to the seal, laser light is irradiated to detect the reflected light from the seal with the optical sensor, and the seal is discriminated by the discriminating means. 9. The method of verifying a forgery prevention seal according to claim 8, wherein the notification is made by notifying the notification means. 10. A hologram formed by arranging a laser recording paper sensitive to reflected light of laser light on the case, arranging a transparent portion of the case to face the seal, irradiating laser light, and reflecting light from the seal. 10. The method for collating anti-counterfeit seals according to claim 8 or 9, wherein is recorded on the laser recording paper, and whether the seal is correct or not is determined by the recording. 11. An anti-counterfeiting seal, characterized in that the seal is irradiated with diffused coherent light, a hologram resulting from the reflected light is directly reproduced on the retina, and the correctness of the seal is visually determined. Matching method.