JP2001337603A - Seal for identification, article adhered with identification seal and means to distinguish article's authenticity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constitution and a means to authenticate articles (pictures) 1b1, 1b2 certainly and easily, and prevent the unfair production of forgery and the unjust exchange of authentic articles and forgeries. SOLUTION: It is constituted that an article is adhered a forgery prevention seal 1a which possesses a hologram pattern that is able to identify the article's authenticity without fail by confirming with eyes the external shape of CGH (calculator-generated hologram) pattern recorded in the seal 1a's base bodies 6, 36 or a pattern 1g of a diffracted image 1f obtained by irradiating the CGH with the monochromatic light 1d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proof seal, a proof seal-equipped article, and an authentic article discriminating method which are attached to various articles and used for certifying authenticity and preventing theft.

[0002]

[Prior art]

Expensive articles or commodities are exposed to the risk of counterfeiting, counterfeiting, or improper replacement with counterfeit goods for the purpose of illegal sale or theft.

FIG. 10 is a diagram simulating the inside of a museum where paintings 10a and 10b are displayed. Many of the paintings displayed in museums are expensive when sold as commodities, and at the same time have invaluable value as cultural properties.The owners of museums, painting owners, etc. exercise strict security. Needless to say, we are taking measures to prevent painting theft. However, as the history of the past demonstrates, the higher the value or value of an item, the greater the risk of forgery and forgery. The danger of unauthorized exchange with the work and the removal of genuine products to the outside also increases.

[0004] For example, in the art museum shown in FIG. 10, a security guard patrols or a surveillance camera installed in the hall constantly monitors the paintings 10 a and 10 b during the daytime opening hours and the nighttime closing hours. Should have been prevented. Therefore, a thief who simply removes a painting will immediately find out that the theft has occurred because the painting does not exist where it should be, but elaborate counterfeit works are secretly brought into the museum and authentic. It would be difficult to tell immediately that the theft had occurred, and the probability of the stolen genuine painting being taken out of the reach of the government would also be greater .

[0005] The more sophisticated and subtle the illegally exchanged counterfeit work becomes, the more difficult it is to discriminate it as a genuine product, and the number of specialists (appraisers) who can make the discrimination is very limited. In order to be able to respond immediately if an unauthorized exchange with a counterfeit work is performed, an expert will always accompany the guards in daily security and check whether the paintings displayed are authentic. Confirmation is desirable but not a practical method.

[0006] Therefore, if a person other than an expert expert can prove immediately whether an article is genuine or not, it is possible to perform security efficiently and prevent crime. The configuration or method for realizing it has not been provided so far.

On the other hand, conventional products and articles such as videocassettes, credit cards, computer application software packages, etc., prove authenticity and are forged,
As a means for preventing forgery, a rainbow hologram seal, which is called a rainbow hologram and is formed on a surface of a seal with a pattern in which multicolored virtual images such as characters and figures appear in response to natural light irradiation, has been used.

[0008] However, the above-mentioned rainbow hologram seal has an advantage that it can be easily visually confirmed, but it has poor image quality, cannot display small characters clearly, and has a source display or an ID number. It could not be used to display detailed character strings to certify goods. Furthermore, in the rainbow hologram,
As a more fatal issue, it is generally distributed in the market and it is created based on photoengraving technology, so it is difficult to forge it, but prepare relatively small equipment By doing so, the difficulty was solved, and there was a risk of forgery.

Therefore, the risk of forgery of the rainbow hologram itself cannot be said to be zero, and once forged, the reproduced image is an unclear image with a small amount of information as described above. However, there is a problem that the means for proving the authenticity of the article is completely insufficient.

In view of the above, the present invention particularly provides a structure in which a CGH (computer generated hologram) pattern which produces a diffraction image for authenticity proof by irradiating monochromatic light is provided on a base, so that a counterfeit product can be manufactured. An object of the present invention is to provide a certifying seal, an article with a certifying seal, and an authentic article discriminating method, which is extremely difficult and certifies that the article is genuine.

[0011]

In order to solve the above-mentioned problems, the present invention provides a certifying seal, a proof-sealing article, a genuine article discriminator having the following constitutions (1) to (4). Provide a way. (1) Articles (paintings) 1b1 and 1b2 with stickers attached
Proof seal (forgery prevention seal) 1
a, a CGH (computer-generated hologram) pattern (grating CGH, multi-valued CGH) that produces diffraction images (unique patterns) 1f and 1g for authenticity proof by irradiation with monochromatic light (irradiation light) 1d , Substrate (base film,
(A hologram foil section) 6, 32, a certification seal 1a. (2) Articles (paintings) 1b1 and 1b2 with stickers attached
Proof seal (forgery prevention seal) 1
a, a CGH (computer-generated hologram) pattern (grating CGH) that produces diffraction images (unique patterns) 1f and 1g by irradiation with monochromatic light (irradiation light) 1d
Based on the multi-valued CGH, a visible shape for authenticity verification (grating CGH “AB
C ", and a multi-valued CGH" ABC "shown in FIG. 9 are provided on the bases (base film, hologram foil portion) 6 and 32, respectively. (3) The article (painting) 1b1 having a surface to which the certification seal (forgery prevention seal) 1a according to claim 1 or 2 can be attached, and the certification seal 1a attached to the surface. 1b1 and 1b2, characterized by being able to prove the authenticity of 1b2. (4) Articles (paintings) 1b1, 1 on which the certification seal (forgery prevention seal) 1a according to claim 1 or 2 is attached.
An authentic article discriminating method for discriminating the authenticity of b2,
C provided on the bases 6 and 32 of the certification seal 1a
A GH (computer-generated hologram) pattern (grating CGH, multi-valued CGH) is irradiated with monochromatic light (irradiation light) 1d, and diffraction images (unique patterns) 1f and 1g for authenticity authentication generated by irradiation of monochromatic light 1d are generated. The presence / absence of the object is detected, and when the diffraction images 1f and 1g for authenticity appear, the articles 1b1 and 1b2 to be discriminated are judged to be articles having authenticity, and the authenticity is verified. Diffraction image 1f, 1g
If the item does not appear, it is determined that the articles to be determined 1b1 and 1b2 are articles having no authenticity.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a schematic view of a museum in which a painting with an anti-counterfeiting sticker, which is one embodiment of the certification seal of the present invention, is displayed, and FIG.
3 is a cross-sectional view of an anti-counterfeit seal according to the present invention, FIG. 3 is a plan view of the anti-counterfeit seal shown in FIG. 1, and FIG. FIG. 6 is a diagram illustrating a cross-sectional shape of a multi-valued CGH, FIG. 7 is a diagram illustrating a structure of a hologram reproducing device, and FIG. 8 is a diagram illustrating a diffraction image obtained from a binary CGH. FIG. 9 is a plan view of another embodiment of the certification seal of the present invention.

First, a description will be given with reference to FIG. 1, that is, a schematic view of an art museum where a painting on which a forgery prevention seal is attached, which is one embodiment of the certification seal of the present invention, is displayed.

The outline of the forgery prevention seal 1a shown in FIG.
When the surface of the anti-counterfeit seal 1a is irradiated with monochromatic laser light as irradiation light 1d by irradiation means 1c separately prepared, reflected diffraction light 1e is emitted, and reflected diffraction light 1e is emitted to a structure having a predetermined arrangement and reflectance such as a white wall surface 1h. Hitting diffraction image 1f
To form

The anti-counterfeit seal 1a is formed in advance so that the unique pattern 1g appears in the diffraction image 1f. By confirming the unique pattern 1g, the seal is attached together with the anti-counterfeit seal 1a. Painting 1b
The configuration and method are such that 1, 1b2 can be immediately and surely proved to be genuine.

As shown in FIG. 1, in addition to the simple method of making the diffraction image 1f appear on the white wall surface 1h, a method using a dedicated reproducing device 7a as described later may be used.

The structure of the forgery prevention seal 1a shown in FIG.
This will be described with reference to the cross-sectional view of FIG.

As shown in FIG. 2, the anti-counterfeit seal 1a has a base film 6 having a light-transmitting property, a hologram layer 7 thereunder, and a reflective metal film 8 thereunder, and is adhered to the lowermost layer. A layer 9 is provided.

The hologram layer 7, the reflective metal film 8, and the adhesive layer 9 form a hologram foil 32.

In the posture of the forgery prevention seal 1a shown in FIG. 2, the upper side corresponds to the display surface (surface visible from the outside) after bonding to the paintings 1b1 and 1b2, and the lower side corresponds to the paintings 1b1 and 1b.
The surface to be bonded to 2.

In producing the anti-counterfeit seal 1a, first, a UV curable resin or the like is applied to the lower surface of the base film 6 made of a light-transparent resin, and a stamper having a CGH (described later) is formed on the applied surface. The hologram layer 7 is formed by pressing and irradiating UV light from the base film 6 side to cure the UV resin.

Thereafter, a reflective metal film 8 is formed by sputtering metal or the like on the lower surface of the hologram layer 7, and an adhesive layer is provided to complete the anti-counterfeit seal 1a. Alternatively, unlike the above, the base material 6 and the hologram layer 7 can be integrally formed by resin molding.

The above CGH is a “computer hologram” realized by a diffraction grating designed using a computer.
(CGH: Computer Generated Hologram), for example, a publicly known magazine “O plus E” ('96, November issue) 8
An example of the optimization method is described on page 3 and below.

The computer generated hologram calculates the phase distribution corresponding to the interference fringes of the diffraction grating by performing an inverse Fourier transform of the diffracted light arrangement information corresponding to the diffraction angle of the desired diffraction grating. A step is formed on a substrate by applying a semiconductor manufacturing technique to the step, and the step is transferred to an optical recording medium. The computer generated hologram (hereinafter, CGH) has a function of generating an image based on the reflected diffraction light of the diffraction grating when irradiated with single wavelength light.

As for an optical recording medium having CGH and a method for manufacturing the same, there is a technique disclosed by the present applicant in Japanese Patent Application Laid-Open No. Hei 10-143929. In manufacturing the forgery prevention seal 1a having the configuration of the present embodiment, the disclosed technology may be used.

For a normal grating CGH (a CGH using a diffraction grating) or a binary CGH (a CGH having a shape that causes diffraction having a height of two levels), a diffraction grating can be formed by a single etching. it can. In addition, binary CG
In H, for example, if a character "A" is to be obtained as a diffraction image, "A" is obtained as a reproduced image point-symmetrically with respect to DC light (0th-order diffracted light) as shown in FIG.

However, when an image having an arbitrary shape, not limited to a symmetric shape, such as the diffraction image 2 shown in FIG. 4 is to be generated, a technique which has been applied for a patent by the present applicant but has not been disclosed is disclosed. It is possible to realize. An outline of the above-mentioned application technology is to configure a CGH by multi-valued CGH (a structure that causes diffraction is configured to have a plurality of heights (depths)),
This is to produce a diffraction image including an asymmetric figure.

In the above-mentioned application technique, the depth of the interference fringes is λ, the wavelength of the incident light, r is the refractive index of the element substrate, n ₀ , the refractive index around the element substrate, n ₁ , Assuming that the incident angle of the incident light beam on the substrate is θ, in the case of the reflection type diffractive optical element, r = 1 / (4 × n ₀ × co
sθ), and in the case of the binary value shown in FIG. 5, it is given by the depth d = rλ / 2 of one stage of CGH. In the case of n value, as shown in FIG.

In particular, forgery prevention seal 1 using multi-valued CGH
By constructing a, any character pattern, graphic pattern, mark, etc., not limited to a symmetrical shape, can be obtained as a diffraction image, so that high-level information such as an ID number for proving authenticity, a product number, and a source display is displayed. You can do it.

The paintings 1b1 and 1b2 of the present embodiment have the configuration in which the forgery prevention seal 1a having CGH is attached as described above, and for the following reason, the forgery prevention seal 1a is used.
a itself and a painting 1b on which a forgery prevention seal 1a is attached
Forgery (forgery) of 1 and 1b2 is difficult, and a forgery prevention effect is achieved.

First, the external shape of the CGH pattern (grating CGH "ABC" shown in FIG. 4 and multi-valued CGH "ABC" shown in FIG. 9) formed on the surface or inside of the forgery prevention seal 1a is designated by a specific character. If a pattern shape that shows the authenticity of the product, such as a trademark or a trademark, is used, it is possible to immediately know that the attached product (the paintings 1b1 and 1b2 in the example) is a genuine product by looking at the pattern shape. Since the CGH pattern itself can be formed only through advanced technology, equipment and work using a computer as described above, it has a counterfeiting prevention effect that unauthorized forgery by a genuine manufacturer is extremely difficult. The forgery prevention seal 1a itself and the forgery prevention seal 1
a (a picture 1b1, 1b in the embodiment)
2) has a function to reliably prove that the product is genuine.

Further, as shown in FIG. 3, the hologram portion of the hologram foil 32 is irradiated with a single wavelength light to reproduce the reflection diffraction image 1, and the reproduced image is an image showing the authenticity of the product, for example, a brand name. If the image is a maker name, a product name, product information, or the like, it is possible to more reliably prove that the CGH is genuine, in addition to the fact that the CGH is difficult to forge. Further, as shown in FIG. 4, in addition to CGH that generates a diffraction image, for example, a brand name, a manufacturer name, a product name, product information, and the like, which are displayed on a hologram foil by a rainbow hologram recorded in a pattern by a CGH creation technique, are visually observed. It is also possible to provide a double proof function by making it possible to confirm and link the visual image and the diffraction image and confirm them.

As a form of recording CGH as a pattern, a form in which a rainbow and a multi-valued CGH are mixed as shown in FIG. 4 and a rainbow hologram in which an arbitrary image is recorded with an arbitrary background as shown in FIG. It is also possible to adopt a form in which a character portion is composed of multi-valued CGH, and a single-wavelength light is applied thereto to generate a diffraction image 3 as a recognizable object.

Further, the forgery prevention seal 1a may be constituted by using a base film or a hologram foil which may be damaged if it is forcibly peeled off from the attached pictures 1b1 and 1b2. If the prevention seal 1a is illegally peeled, it will be damaged and easily found from the outside. Therefore, even if the illegally peeled anti-counterfeit seal 1a is stuck on a forged product to disguise the genuine product, it is immediately damaged because of the damage. It is determined that the product is a counterfeit product. Therefore, the picture 1b1, on which the undamaged anti-counterfeit seal 1a is attached,
1b2 has an effect of being more surely proved to be a genuine product.

Further, since the forgery prevention seal 1a is a thin and small seal-like member, it is relatively low cost for a regular manufacturer having predetermined production equipment required for manufacturing a CGH sheet such as a semiconductor manufacturing apparatus. The process of attaching the seal to the product is easy and requires no special skill, and the testing of the application is easy, and the manufacturer of the product can prove the authenticity without putting a heavy burden. Having.

In order to attach the forgery prevention seal 1a, it is sufficient that the article has a flat or curved surface having an area for attaching the seal 1a. Therefore, the structure of the article is changed so that the seal 1a can be attached. It is not necessary to provide a special configuration, for example, a mounting ring, a concave portion, a hole, or the like, or it is easy to change the outer shape of the seal 1a according to the shape of the article or to design a seal 1a having a new shape. As a result, the burden on the manufacturer of the article can be reduced.

By the way, the method of reproducing the diffraction image 1f of the forgery prevention seal 1a of the present embodiment described above with reference to FIG.
A single laser irradiation means 1c such as a laser beam pointer
This is a simple method of obtaining a diffraction image 1f formed on the wall surface 1h by performing irradiation. On the other hand, as another method for reproducing the hologram image (diffraction image), a reproducing device 7a according to the present inventor's invention may be used, which will be described with reference to FIG. In the reproducing device 7a shown in FIG. 7, the monochromatic light emitted from the light emitting device 7b is reflected by the mirror 7c and then applied to the CGH portion 7d of the hologram foil adhered to the article.

The reflected light diffracted by the hologram forms an image on the screen 7e and can be visually observed. If an image sensor such as a CCD is arranged at the position of the screen 7e, it is also possible to process a diffraction image electrically.

Next, in this embodiment, another application example in which the forgery prevention seal 1a described above is attached to the electronic component sealing body 3a to prevent forgery or prevent unauthorized replacement will be described.

The information equipment is equipped with a central processing unit for control, a read-only memory with a built-in program, a random access memory, and the like, which are well-known techniques. In the read-only memory, for example, a control program such as a BIOS, an application program for causing an information device to function, and the like are fixedly stored. Further, the central processing unit executes and executes a program stored in a read-only memory or a peripheral storage medium.

By the way, recent high-performance central processing units are expensive, so that counterfeit products are distributed in the market, and read-only memories of counterfeit products obtained by illegally copying legitimate application software are distributed, which has become a social problem. I have.

Conventionally, a manufacturer (source indication), a model number, and the like are printed on the upper surface of a sealed electronic component housing (package) in which electronic components such as a central processing unit and a read-only memory are housed and sealed. . Then, the manufacturer claimed that the printed electronic component sealing body and the internal electronic component were genuine products by these printings. However, normal printing can be easily forged, and even if printed, it cannot be proved that it is genuine.

In this embodiment, which is another application example of the embodiment, the forgery prevention seal 1a attached to the pictures 1b1 and 1b2 in the above description and used for certifying the authenticity is sealed with the electronic component as shown in FIG. Affixed to the upper surface of the body 3a (the posture shown in FIG. 3),
The configuration and method are used to prove the authenticity of the electronic component or the electronic component sealing body 3a.

When the hologram foil of the anti-counterfeit seal 1a is attached to the package (sealed electronic component) 3a, the surface of the package is glossy in order to maintain the adhesiveness and the accuracy of the CGH diffraction image. It is desirable that there is no unevenness. However, since there is also a matte-shaped surface, in this case, the adhesive layer of the hologram film should be thicker than the surface roughness dimension of the matte surface, and if the adhesive layer enters the concave portion of the matte surface, Since a sufficient adhesive force can be obtained and the flatness of the CGH layer can be obtained, a diffraction image with sufficient accuracy can be obtained. Also, the surface of the package may be polished or the like by a mechanical method such that the surface becomes a glossy surface, or the matte surface may be coated with a resin, so that the uneven portion is eliminated and the glossy surface may be formed.

Since the electronic component sealing body 3a of this application example has the configuration in which the anti-counterfeiting seal 1a having the CGH is attached as described above, the electronic component sealing member 3a is provided with the anti-counterfeiting seal for the same reason as when it is applied to the pictures 1b1 and 1b2. It is difficult to forge (forge) the seal 1a itself and the electronic component sealing body 3a to which the forgery prevention seal 1a is adhered, and the forgery prevention effect is achieved.

That is, if the external shape of the CGH pattern formed on the surface of the anti-counterfeit seal 1a is a pattern shape that indicates the authenticity of the product, such as a specific character or trademark,
It can be seen from the pattern shape that the attached electronic component sealing body 3a is a genuine product, and the CGH pattern itself requires advanced technology, equipment, and work using a computer as described above. The forgery prevention seal 1a itself and the electronic component sealed body to which the forgery prevention seal 1a is adhered, since it can be formed only after passing through and has an anti-counterfeiting effect that it is extremely difficult for unauthorized counterfeiting by a genuine manufacturer. 3a has a function of reliably proving that it is genuine.

Further, as shown in FIG. 3, the hologram portion of the hologram foil 32 is irradiated with a single wavelength light to reproduce the reflection diffraction image 1, and the reproduced image is an image showing the authenticity of the product, for example, a brand name. If the image is a maker name, a product name, product information, or the like, it is possible to more reliably prove that the CGH is genuine, in addition to the fact that the CGH is difficult to forge.

In the above embodiment, the configuration has been described on the assumption that the hologram for display and image reproduction uses CGH. As described above, unlike the above-mentioned CGH, other holograms formed using a photographic image have a problem that unauthorized forgery is not completely eliminated due to the easiness of the process. On the other hand, CGH is created through extremely sophisticated equipment, technology and work using a computer as described above, and the difficulty of forgery is much greater than that of a hologram based on a photographic image. Therefore, the effect of the present invention can be surely exhibited by adopting the above configuration using CGH.

Further, the anti-counterfeit seal 1a in the above-described embodiment has a unique pattern shape (the grating CGH “ABC” shown in FIG. 4 and the multi-valued CGH shown in FIG.
In addition to the “ABC”), the diffraction image appearing in response to the irradiation of the monochromatic light also exhibited a unique pattern, and also exhibited a reliable authenticity proof function. On the other hand, in the practice of the present invention, only the external shape of the CGH pattern that can be visually recognized may be configured as a forgery prevention seal that certifies the authenticity of the article by exhibiting a unique pattern, or a monochromatic light. Only the diffraction image that appears in response to the irradiation exhibits a unique pattern, and may be configured as an anti-counterfeit seal that proves the authenticity of the article, and each configuration also proves the authenticity of the attached article. The present invention exerts the effects of the present invention and is included in the present invention.

[0050]

As described in detail above, the present invention has a CGH (computer-generated hologram) pattern that produces a diffraction image for authenticity proof by irradiation with monochromatic light, thereby facilitating the manufacture of counterfeit products. It is difficult, and it is possible to reliably and easily prove that the article is a genuine article, and not to increase the burden on the manufacturer.

[Brief description of the drawings]

FIG. 1 is a schematic view of a museum in which a painting with an anti-counterfeiting sticker, which is one embodiment of the certifying seal of the present invention, is displayed.

FIG. 2 is a sectional view of the forgery prevention seal shown in FIG.

FIG. 3 is a view showing one embodiment of an article with a certification seal of the present invention.

FIG. 4 is a plan view of the forgery prevention seal shown in FIG. 1;

FIG. 5 is a diagram showing a cross-sectional shape of a binary CGH.

FIG. 6 is a diagram illustrating a cross-sectional shape of a multilevel CGH.

FIG. 7 is a diagram for explaining the structure of a hologram reproducing device.

FIG. 8 is a diagram showing a diffraction image obtained from binary CGH.

FIG. 9 is a plan view of another embodiment of the certification seal of the present invention.

FIG. 10 is a schematic diagram of a museum where a conventional painting is displayed.

[Explanation of symbols]

 1a Anti-counterfeit seal (certification seal) 1b1, 1b2 Painting (article, article to be discriminated) 1d Irradiation light (monochromatic light) 1f Diffraction image (diffraction image for authenticity proof) 1g Unique pattern (diffraction for authenticity proof) Image) 6 Base film (base) 36 Hologram foil (base)

Claims (4)

[Claims] 1. A certifying seal for certifying the authenticity of an article to which a sticker is attached, wherein a C-color image for producing a diffraction image for certifying the authenticity by irradiation with monochromatic light.
A certification seal characterized in that a GH (computer generated hologram) pattern is provided on a base. 2. A certifying seal for certifying the authenticity of an article to which a sticker is attached, wherein the certifying seal is based on a CGH (computer-generated hologram) pattern that produces a diffraction image by irradiation with monochromatic light. A certification seal characterized in that a visible shape is provided on a base. 3. A surface to which the certification seal according to claim 1 or 2 can be attached, and that the authenticity of the article can be proved by attaching the certification seal to the surface. An article with a proof seal, characterized by: 4. An authentic article discriminating method for discriminating the authenticity of an article to which a certification seal is attached according to claim 1 or 2, wherein a CGH (computer) provided on said base of said certification seal is provided. Hologram) irradiates the pattern with monochromatic light, detects the presence or absence of a diffraction image for proof of authenticity caused by irradiation of the monochromatic light, and determines whether the diffraction image for proof of authenticity appears. Identifying the article as having authenticity and, if the diffraction image for authenticity does not appear, identifying the article to be identified as having no authenticity; Article identification method.