JP3711806B2 - Product authenticity judgment method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, cosmetics by the hologram, bags, clothes, about the authenticity determination method of the goods in order to prevent the forgery to determine the authenticity of the other luxury brands.
[0002]
[Prior art]
The traditional way to prevent counterfeiting of cosmetics, bags, clothes and other high-end brand products is to print a mark representing a brand mark on a label, tag, plate, etc., and attach this print to a part of the product. Thus, a method for determining the authenticity of a product is common. As another method, for example, a credit card or the like is known in which a mark such as a trademark is formed by a grating processed hologram on a card-like substrate or a relief-like unevenness.
[0003]
[Problems to be solved by the invention]
However, a printed matter in which a mark representing a trademark such as a brand mark is printed on a label, tag, plate, or the like is easy to forge and has a problem that the effect of preventing forgery is small. In addition, a method of attaching a serial number, barcode etc. to the position different from the brand mark of the product by stamping, printing etc. and using this for authenticity determination is also known, but this is also destroyed by counterfeiters, In some cases, it was removed and it did not function as an authenticity judgment.
[0004]
In addition, the grating processed hologram and the relief-shaped irregularities have a problem that they are easily forged because of their simple structure. Furthermore, this method cannot represent the serial number of a product.
[0005]
In view of the above problems of the prior art, forgery can determine the authenticity of the product by a hard hologram, and aims to provide the authenticity determination method of the goods that can be prevented and thus counterfeiting To do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention reduces the reflection of zero-order light during hologram reproduction by subjecting the surface of a product in which an optical recording medium is embedded to a matte finish to diffuse incident light. is there.
[0007]
That is, according to the present invention, the mark formed on the light-transmitting resin member that can identify the product is manufactured by the first hologram on which grating processing is performed, and the computer formed in the vicinity of the first hologram. A second hologram representing the product data, and a reflection film is formed on the first and second holograms, the second hologram destroys the reflection film at an arbitrary position, An optical recording medium on which data is recorded by erasing the hologram pattern at that position so as to be unreadable is embedded in the embedded portion of the product so that the reflective film side is disposed opposite to the product, and the light-transmitting resin member shines incident illumination light of the reproducing apparatus from the side, reading the diffracted light of the hologram pattern of the position where the reflective film is destroyed is cleared the second hologram beam or al In authenticity determination method of the product determining the authenticity of the product by taking,
The embedding part surface before Symbol products, is decorated with satin finish for by diffusing the incident the illumination light to reduce the reflection light of the 0-order light of the diffracted light authenticity of the product, characterized in Rukoto A determination method is provided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a first embodiment of an optical recording medium and a method for determining the authenticity of a product according to the present invention, FIG. 2 is an explanatory diagram showing in detail the structure of the optical recording medium in FIG. 1, and FIG. FIG. 4 is an explanatory diagram showing an example of the data CGH in FIG. 1, and FIG. 5 is a block diagram showing a configuration of the data CGH reproducing apparatus in FIG.
[0010]
FIG. 1 shows an optical recording medium 1 and a cosmetic bottle 2 as an example of a product in which the optical recording medium 1 is embedded. The optical recording medium 1 of this example is composed of a circular plate having a diameter of 4 mm, and its surface is divided into 3 × 3 regions. In the five areas, marks (hereinafter simply referred to as “marks”) 3 (ABC Inc. in the figure) (sometimes indicated as “registered trademark” in the figure) are formed in the five areas. In the remaining four areas, data CGH (Computer generated hologram) 4 representing arbitrary data corresponding to the applied product is formed.
[0011]
The size of the optical recording medium 1 may be designed larger if the product is large corresponding to the shape of the product to be embedded. Then, the optical recording medium 1 is fixed in a recess having the same size as the optical recording medium 1 formed on the surface of the bottle 2 using an adhesive or a double-sided tape.
[0012]
FIG. 2 shows the structure of the optical recording medium 1 in detail. The data CGH4 in this example is a reflection phase type, and a phase distribution corresponding to the reproduction light is recorded. FIG. 2 (4) shows a side structure of the optical recording medium 1, particularly the data CGH 4 portion. In this example, it is a binary type CGH, and irregularities corresponding to optical depth = 0, π based on the wavelength of illumination light are molded on a light-transmitting resin member 11 (acrylic, polycarbonate, etc.) as a substrate. A metal reflective film 12 (aluminum, gold, etc.) is coated thereon, and a protective film 13 (UV curable resin, etc.) is further coated thereon. The light transmissive resin member 11 can be mass-produced by injection molding.
[0013]
Here, the data CGH4 is a phase hologram described in, for example, O plus E, 96.December, P83-88 “Computer hologram optimization method”. Specifically, the phase distribution corresponding to the interference fringes of the diffraction grating can be obtained by performing inverse Fourier transform on the diffracted light position information corresponding to the desired diffraction angle using a computer. Then, a blaze (stepped step) corresponding to this phase distribution is created on a glass substrate by applying semiconductor manufacturing technology as shown in, for example, Japanese Patent Laid-Open No. 9-230121, and the blaze on the glass substrate is created. It transfers to the light transmissive resin member 11 as another substrate. In addition, as shown in FIG. 2 (2), the binary CGH is divided into two periods of one wavelength (λ) of the incident light wavelength λ, and the phase difference for one value is 2π / 2. The CGH is composed of two steps including a stepped step of 0π (a portion where no phase change is performed). Therefore, the n-value type CGH means that one period (2π) of the wavelength λ of incident light is divided into n so that the phase difference for one value is 2π / n, and the stepped step is 0π (phase change is performed). This is a CGH composed of n stages including a non-existing portion.
[0014]
Marks such as characters and figures representing the mark 3 are filled with a grating as shown in an enlarged view of FIG. 2 (3). In this example, lines having a line width of 1 μm constitute a grating with a pitch of 2 μm. . The depth of the grating corresponds to the optical depth = 0, π, similarly to the data CGH4. The grating pattern is also called a rainbow hologram because it looks rainbow under natural light.
[0015]
The characteristics of the rainbow hologram (grating) will be described with reference to FIG. FIG. 3 (1) shows the relationship between the diffraction order and the intensity, and the intensity of the diffracted light is strongest in the first order and becomes weaker in the order of the third order and the fifth order. The relationship between the observation angle and the hue can be calculated from the equation (1) in FIG. 3, and the first and third order diffracted lights having relatively high intensities are as shown in FIG. 3 (2). From the result, it can be seen that when the rainbow hologram is observed with white light as shown in FIG.
[0016]
FIG. 4 shows an example of the data CGH4, and the information recorded as the data CGH4 has the same design (mark) as the mark 3. Therefore, when the data CGH reproducing device 100 applies illumination light to the data CGH4, the mark Play the same playback image as. Therefore, in this case, when the reproduced images of the data CGH 4 and the mark 3 are compared and recognized as the same, the optical recording medium 1 and the product (bottle) 2 in which the optical recording medium 1 is embedded can be determined to be genuine. .
[0017]
FIG. 5 schematically shows the data CGH reproducing apparatus 100 shown in FIG. In FIG. 5, when data CGH 4 (and mark 3) is illuminated by coherent light from the illumination device 101, the illumination light is reflected and reflected by the data CGH 4, and diffracted light is received by the light receiving device 102. The light receiving device 102 is a two-dimensional imaging device such as a CCD or PD, and therefore can measure the position and intensity of two-dimensional diffracted light. In the diffracted light intensity distribution signal output from the light receiving device 102, the 0th-order light processing device 103 replaces the light intensity of the 0th-order light with “0”, and the entire diffracted light intensity excluding the 0th-order light has a predetermined value. Amplified by the gain and sent to the diffracted light recognition device 104. The diffracted light recognition device 104 compares the plurality of diffracted light intensity distribution data registered in advance as reference data with the data sent from the 0th-order light processing device 103, thereby authenticating the optical recording medium 1 (and hence the product 2). Determine.
[0018]
FIG. 6 shows another example of the data CGH4, and information recorded as the data CGH4 is a mark (four petals) different from the mark 3. In this case, when the illumination light is applied to the data CGH4, an arbitrary reproduction image designed is reproduced, so that when the reproduction image and the design value are compared and recognized as the same, the optical recording medium 1 and this are embedded. It is determined that the product 2 is genuine. The information recorded in the data CGH4 is not limited to the image information in this example, and may be in any form such as numbers, symbols, coded serial numbers, and the like.
[0019]
FIG. 7 shows an example in which the appearance of the optical recording medium 1 and the hologram arrangement are modified. In the modification shown in FIG. 7A, a single mark 3 is formed large in the center of the circular optical recording medium 1, and a plurality of data CGH4 is formed therearound. The external shape of the optical recording medium 1 is not specified as a circle, and may be a rectangle or a polygon in addition to a circle corresponding to the product to be embedded. The arrangement of the data CGH4 and the mark 3 is not limited and may be freely mixed. In the modification shown in FIG. 7B, five data CGH4 are arranged in a cross shape on the rectangular optical recording medium 1, and four marks 3 are arranged in the remaining corner portions. In the modification shown in FIG. 7 (3), one mark 3 is formed large at the center of the triangle, and three marks 3 are arranged in each corner portion.
[0020]
<Second Embodiment>
FIG. 8 shows an optical recording medium according to the second embodiment. As in the first embodiment, the surface of the optical recording medium 1 is divided into 3 × 3 areas, and marks 3 (ABC Inc in the figure) are formed in five areas. In the second embodiment, data CGH units are formed in the remaining four areas so that more data can be represented by the data CGH4, and one CGH unit has 2 × 2 = 4 pieces of data CGH4. (16 in total).
[0021]
Next, a method for representing data by data CGH4 will be described. This data CGH4 forms a plurality of hologram patterns on the light transmissive resin member 11, forms a reflection film 12 thereon, destroys the reflection film 12 at an arbitrary position, and makes the hologram pattern at that position unreadable. A plurality of bits of data are represented by erasing. FIG. 9 shows that 3-bit data is represented by three hologram patterns (unevenness in the figure) for the sake of simplicity. In FIG. 9 (1), all three hologram patterns are formed. In this case, incident light passes through the light-transmitting resin member 11 and is reflected by the reflecting film 12, and at this time, the light-transmitting resin member All three projections and depressions provided in 11 cause a phase difference in the reflected light, and diffracted light is generated. Therefore, 3-bit data = 111 is represented.
[0022]
FIG. 9 (2) shows, as an example, that the metal reflection film 12 corresponding to the second bit of the 3-bit data is erased by the laser beam to make the second bit unreadable and represent 3-bit data = 101. Yes. A laser suitable for precision processing such as YAG laser or CO ₂ laser is used. When laser light is irradiated, the laser light passes through the light-transmitting resin member 11 and only the metal reflection film 12 is sublimated. For this reason, since the metal reflecting film 12 does not exist at the place irradiated with the laser, the incident light cannot be returned, the light diffraction phenomenon does not occur, and the reproduction light of the CGH does not occur. Therefore, it is possible to represent 1 bit data = 0 by making the laser irradiated place unreadable.
[0023]
By the way, as shown in FIG. 9 (3), when the protective film 13 side of the optical recording medium 1 is embedded so as to face the surface of the product 2, the material of the product 2 is a highly reflective metal or reflectance. In the case where the material having a high thickness is coated, the incident light transmitted through the protective film 13 is reflected from the surface of the product 2 from the place where the reflective film 12 is erased, and is mixed with the reproduced light to be reproduced image. May be disturbed. Therefore, an antireflection film 14 is further formed on the protective film 13 of the optical recording medium 1 as shown in FIG. 9 (1) 'instead of FIG. 9 (1), thereby absorbing incident light and suppressing reflection. . As the antireflection film 14, an oxide film such as Cr _x O _y (chromium oxide) or Ti _x N _y (titanium nitride) is formed by a sputtering apparatus. As another method, by processing the surface on the embedded product 2 side into a satin finish (15 in the figure) by mechanical processing such as sand blasting as shown in FIG. 9 (3) ′ instead of FIG. 9 (3), This surface may diffuse incident light so that it does not return as reflected light.
[0024]
10 and 11 show a case where one data CGH4 is composed of four petals in order to represent 4-bit data by one data CGH4. Further, one data CGH unit is composed of four data CGH4, and is composed of a total of 4 × 4 data CGH4 per one optical recording medium. Further, three optical recording media 1 are made into one product 2. When embedded, the product 2 can be expressed by 4 × 4 × 3 = 48-bit data. Accordingly, it is possible to record a large amount of data, and it is possible to record a serial number, product-specific information, etc. as the recording data. Note that the reproduction in this case can be performed for each data CGH unit by the two-dimensional image sensor.
[0025]
FIG. 12 and FIG. 13 show an attachment method when the optical recording medium 1 (CGH pellet 1) is embedded in the sprayer 2a attached to the spray type cosmetic bottle 2 as an example of a product. As a manufacturing method of CGH pellets, a large number of CGH pellets 1 are formed on a single substrate, and then this substrate is cut into CGH pellets 1 and a “molded plate punching method”. There is a “takoyaki molding method” that separates after molding like a part. The CGH pellet 1 thus formed is embedded on the side surface of the resin or metallic sprayer ring 2b through the adhesive layer 16 on the reflective film 12 side of each CGH pellet 1. Next, the sprayer 2 a is assembled by the sprayer ring 2 b, and the sprayer 2 a is attached to the opening of the bottle 2.
[0026]
According to the present invention, the following invention is provided in addition to the invention described in the claims.
(1) A mark that makes a product identifiable on a substrate is formed by a grating-processed first hologram or a relief-shaped unevenness, and a second hologram that represents the same mark around the mark is created by a computer. An optical recording medium formed and embedded in a product.
(2) A method of embedding the optical recording medium described in this specification on the surface of a product,
By diffusing the incident light surface of the product that the optical recording medium is embedded with satin finish, a method of embedding an optical recording medium, characterized in that to reduce the reflection of the zero-order light during hologram reproduction on the surface of the product .
[0027]
【The invention's effect】
As described above, according to the present invention, a hologram representing product data is created by a computer and formed around a mark that enables the product to be identified, and this substrate is embedded in the product, so that forgery is difficult. The authenticity of the product can be determined by a simple hologram, so that forgery can be prevented.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a first embodiment of an optical recording medium and a method for determining authenticity of a product according to the present invention.
FIG. 2 is an explanatory diagram showing in detail the structure of the optical recording medium of FIG.
FIG. 3 is an explanatory diagram showing characteristics of a rainbow hologram.
4 is an explanatory diagram showing an example of data CGH in FIG. 1; FIG.
5 is a block diagram showing a configuration of the data CGH reproducing device of FIG. 4. FIG.
6 is an explanatory diagram showing another example of data CGH in FIG. 4; FIG.
FIG. 7 is an explanatory diagram showing a modification of the appearance of the optical recording medium and the hologram arrangement.
FIG. 8 is an explanatory diagram showing an optical recording medium according to a second embodiment.
FIG. 9 is an explanatory diagram showing in detail the structure of data CGH in FIG. 8;
10 is an explanatory diagram showing an example of data CGH in FIG. 8. FIG.
11 is an explanatory diagram showing the contents of data based on the data CGH of FIG.
FIG. 12 is an explanatory diagram showing an example of attaching an optical recording medium to a product.
FIG. 13 is an explanatory diagram showing an example of attaching an optical recording medium to a product.
[Explanation of symbols]
1 Optical recording medium (CGH pellet)
2 products (bottles)
3 Registered Trademark (Mark)
4 Data CGH

Claims (1)

A first hologram on which a mark for enabling identification of a product formed on the light-transmitting resin member is grating-processed, and a data representing the product manufactured by a computer formed in the vicinity of the first hologram. 2 and a reflection film is formed on the first and second holograms, and the second hologram breaks the reflection film at an arbitrary position and reads the hologram pattern at that position. an optical recording medium on which data is recorded by erasing the inability the embedded into the embedding portion of the product as the reflective film side is opposed to the product, the illumination light of the reproducing apparatus from the light transmitting resin member side the by entering shines, the quotient by the reflective film reads diffracted light of the second hologram nothing et al hologram pattern is erased positions destroyed In authenticity determination method of Product authenticity determining,
The embedding part surface before Symbol products, is decorated with satin finish for by diffusing the incident the illumination light to reduce the reflection light of the 0-order light of the diffracted light authenticity of the product, characterized in Rukoto Judgment method.

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