JP2017132071A - Identification system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an identification system such that it is easy to impart identification information to an article as an object to be identified and device constitution for identifying the article is simple, according to the invention.SOLUTION: According to the present invention, an identification system utilizing a medium (1) at least partially comprising a stress light emission layer (2) is characterized in that the stress light emission layer (2) is provided in a first information recording region (Aor A) applied with stress to emit light (k2) including predetermined identification information, and the system solves the problem to be solved at least by a stress application device which applies the stress to the stress light emission layer (2), an optical detector (d2) which detects the light (k2) emitted from the first information recording region, and comparison determination means of comparing the identification information detected by the optical detector (d2) with predetermined identification information so as to make a determination.SELECTED DRAWING: Figure 5

Description

The present invention relates to an identification system that enables identification of an article and determination of whether or not the article is genuine.

Conventionally, in order to identify an article, identification information is given to the article itself or a package of the article. The identification information may be a so-called character code, a one-dimensional code represented by a bar code, or a QR code (registered trademark) in which characters, numbers, other symbols, etc. are combined at predetermined positions on the product itself or the package of the product Is printed as an identification code such as a two-dimensional code.

However, for the purpose of preventing counterfeiting or authenticating the article, it is not sufficient to simply attach a simple code such as a character code or a bar code, and various countermeasures have been taken.
As an example, measures are taken to prevent counterfeiting or authenticate by combining printing with fluorescent ink or infrared absorbing ink and printing of a barcode.
(See Patent Document 1)

As another example, the reference portion of the printing unit attached to the article is optically read, the read color image is color-separated, and the color distribution data of each color is stored as reference image data, In the determination, there is a method in which a reference portion of the article is optically read and the determination is performed from a correlation value between the read image data and the reference image data. According to this example, forgery prevention and authenticity authentication can be performed without using special ink such as fluorescent ink or infrared absorbing ink.
(See Patent Document 2)

Japanese Patent Laid-Open No. 3-261596 JP2012-194601A

As described in Patent Document 1, a light irradiation device for irradiating light of a predetermined wavelength range to a printed matter using fluorescent ink or infrared absorption ink is essential, and fluorescent ink or infrared absorption is provided on the light receiving side. There is a problem that the configuration on the apparatus side becomes complicated, for example, it is necessary to separate light from ink and light including code information from the original barcode.

Further, as in Patent Document 2, there is an advantage that special ink is not used for printed matter that does not use fluorescent ink or infrared absorbing ink, but it is necessary to generate and store color separation data, and further storage There is a problem that the configuration on the apparatus side becomes complicated, for example, it is necessary to determine from the correlation value between the color separation data being processed and the data read from the determination target.

Therefore, an object of the present invention is to provide an identification system in which identification information can be easily given to an article to be identified and the apparatus configuration for identifying the article is simple.

The identification system of the present invention solves the above problems by means described in the following embodiments.
In addition, the code | symbol attached | subjected in parenthesis in each following aspect is a code | symbol attached as reference for showing the correspondence with the code | symbol attached | subjected to drawing, and does not limit the technical scope of this invention.

According to a first aspect of the present invention, in the identification system using the medium (1) provided with at least a part of the stress luminescent layer (2), the stress luminescent layer (2) is subjected to predetermined identification by applying stress. Provided in a first information recording area (A ₁₁ or A ₂₁ ) that emits light (k2) containing information, and the system includes at least a stress applying device that applies stress to the stress light-emitting layer (2); A photodetector (d2) for detecting light (k2) emitted from one information recording area, and a comparison / determination means for comparing the identification information detected by the photodetector (d2) with predetermined identification information And.

According to the first aspect, the stress light emitting layer that emits light including predetermined identification information by applying stress is provided in the first information recording area. In order to emit light including identification information, for example, the stress light emitting layer may be formed in a pattern corresponding to predetermined identification information. Alternatively, the stress light emitting layer may be formed uniformly, and a light shielding layer patterned so as to have a pattern corresponding to predetermined identification information may be formed thereon. In this way, light having a specific wavelength including the identification information is emitted by applying stress to the stress-stimulated light emitting layer to which the identification information has been applied by a stress applying device. Identification information can be easily obtained by detecting and processing this light with a photodetector. The medium can be identified by comparing and determining the identification information obtained in this way and predetermined identification information.

According to a second aspect of the present invention, in the identification system according to the first aspect, the system irradiates the stress light emitting layer (2) in the first information recording area with light having a predetermined wavelength (L1). ).

According to the second aspect, it is possible to irradiate the stress light emitting layer with light having a predetermined wavelength before applying stress to the stress light emitting layer.
Although it depends on the type of the stress-stimulated luminescent material constituting the stress-stimulated luminescent layer, the stress-stimulated luminescent layer can be excited by irradiating the stress-stimulated luminescent layer with light having a predetermined wavelength.
Alternatively, when a fluorescent light emitting component is present in the stress light emitting layer, the presence or absence of the fluorescent light emitting component can also be detected.

A third aspect of the present invention is the identification system according to the first or second aspect, wherein the medium (1) is a medium capable of recording an image in at least a part of the area, and the first information The recording area (A ₂₁ ) is provided with identification information (B ₂ ) by recording the image.

According to the third aspect, the stress light emitting layer (2) is uniformly formed in at least a part of the first information recording area, and corresponds to predetermined identification information on the stress light emitting layer. By forming the light shielding layer (3) patterned to be a pattern, a part of light emitted when stress is applied to the stress light emitting layer is blocked by the light shielding layer (3). Therefore, the light that has passed through the portion without the light shielding layer (3) is detected as light including identification information.

According to a fourth aspect of the present invention, in the identification system according to the first to third aspects, the medium (1) further includes a second information recording area (A ₁₂ or A ₂₂ ). The identification information corresponding to the identification information (B ₁ or B ₂ ) included in the light emitted from the information recording area (A ₁₁ or A ₂₁ ) is recorded in the second information recording area .

According to the fourth aspect, since the first information recording area and the second information recording area are provided in the medium, it is possible to make a comparison determination only with the identification information detected from each area. Become.

According to a fifth aspect of the present invention, in the identification system according to any one of the first to third aspects, the system includes a predetermined database, and the first information recording area (A ₁₁ or A ₂₁ ), The identification information corresponding to the identification information (B ₁ or B ₂ ) formed in the database is stored in the database.

According to the fifth aspect, since the identification information detected from the first information recording area in the medium is compared with the identification information stored in the predetermined database, it is more sophisticated and reliable. Judgment is possible.

According to the present invention, light having a specific wavelength including identification information is emitted by applying stress to the stress-stimulated light emitting layer provided on the medium. Identification information can be easily obtained by electrically detecting and processing the emitted light.

It is a top view which shows an example of the identification object medium used for the system of this invention. FIG. 2 is a cross-sectional view taken along the line aa in FIG. 1. It is a top view which shows another example of the identification target medium used for the system of this invention. It is a bb arrow sectional drawing of FIG. It is a conceptual diagram which shows 1st embodiment of the system concerning this invention. It is a conceptual diagram which shows 2nd embodiment of the system concerning this invention. It is a functional block diagram of the control apparatus which controls the system concerning this invention. It is a flowchart which shows the process sequence of the system concerning this invention.

First, the identification target medium used in the identification system of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a plan view showing an example of an identification target medium used in the identification system of the present invention.
2 is a cross-sectional view taken along the line aa in FIG.
In the figure, reference numeral 1 denotes a medium on which an image can be recorded in at least a part of an area, and is used for an application that requires some kind of identification, such as a card medium, paper, or label. For this purpose, identification information B ₁ is provided in the first information recording area A ₁₁ of the medium 1. The identification information B ₁ is formed on the substrate 10 so that the stress-stimulated luminescent layer 2 becomes a predetermined pattern image (hereinafter simply referred to as “pattern”) corresponding to the identification information B ₁ .

1, in the example shown in FIG. 2 identification information B ₁ is formed in the form of a so-called bar code. As a form of the identification information, a barcode which is a typical example of a one-dimensional code can be mentioned, but the identification information is not limited to a barcode, and may be a two-dimensional code such as a QR code (registered trademark). Other than that, any information can be given as long as it can be given information as a pattern.

As described above, the stress-stimulated luminescent layer 2 is formed on the surface of the substrate 10 as a certain pattern.
Alternatively, the stress light emitting layer 2 is formed by impregnating the base material 10 as a certain pattern.
As the method for forming the pattern, the stress light emitting layer 2 is used as a printing ink pigment prepared as a printing ink mixed with a binder or a solvent according to the printing method. Typical printing methods include an offset printing method and a silk screen printing method.

Regardless of the printing method, for example, the stress-stimulated luminescent material can be formed as a predetermined pattern on the substrate 10 by a printer represented by an ink jet method or a thermal transfer method.
For example, when forming identification information with respect to the base material 10 with an ink jet printer, an ink prepared by using a stress-stimulated luminescent material as a pigment of an ink jet ink may be prepared. Moreover, when forming identification information with respect to the base material 10 with a thermal transfer printer, a transfer ribbon prepared by using a stress luminescent material as a pigment of a transfer layer of the thermal transfer ribbon may be prepared.

FIG. 3 is a plan view showing another example of the identification target medium used in the identification system of the present invention.
4 is a cross-sectional view taken along line bb in FIG.

In the example shown in FIG. 1, the identification information B ₁ to the first information recording area A ₁₁ of the is provided medium 1, the identification information B ₁ represents the predetermined the stress light-emitting layer 2 corresponding to the identification information B ₁ pattern As shown in FIG.

On the other hand, what is shown in FIG. 3 is that the identification information B ₂ provided in the first information recording area A ₂₁ of the medium 1 has a constant thickness on the surface of the base material 10. The light-shielding layer 3 having a predetermined pattern is provided on the surface of the stress-stimulated light-emitting layer 2 with a light-shielding ink, and the pattern of the light-shielding layer 3 is made to correspond to the identification information.

The light-shielding layer 3 shields light emitted by applying mechanical stress to the stress-stimulated light-emitting layer 2, and includes, for example, an ink made of a titanium pigment, a carbon black pigment, an aluminum pigment, or the like. Is mentioned. The light shielding layer 3 can be easily formed by a printer typified by an ink jet method or a thermal transfer method using an ink containing any of these light shielding pigments. Of course, the light shielding layer 3 may be formed by a silk screen printing method or an offset printing method.

As shown in FIG. 1, the medium 1 may be provided with a second information recording area A ₁₂ in addition to the first information recording area A ₁₁ . As shown in FIG. 3, the medium 1 may be further provided with a second information recording area A ₂₂ in addition to the first information recording area A ₂₁ .

The identification information 12 for determination or the identification information 22 for determination is given to the second information recording area A ₁₂ or the second information recording area A ₂₂ by means other than the stress emission, thereby the identification information. A comparison with B ₁ or the identification information B ₂ is performed. A system-side configuration using the second information recording area will be described in the column of the second embodiment.

Here, the stress-stimulated luminescent material will be described.
As the stress-stimulated luminescent material, those prepared by adjusting the stress-stimulated luminescent particles to inks suitable for various printing methods can be used. As the stress-stimulated luminescent particles, for example, the FeS ₂ structure described in JP 2000-63824 A One or more emission centers of rare earths or transition metals that emit light when electrons excited by mechanical energy return to the ground state in a matrix material comprising one or more of oxides, sulfides, carbides and nitrides of A stress-stimulated luminescent material to which is added, (A) MgAl ₂ O ₄ and CaAl ₂ O _{4 having} a spinel structure, Al ₂ O _{3 having} a corundum structure, and SrMgAl having a β-alumina structure described in JP-A-2000-119647 ₁₀ at least one metal oxide selected from among O ₁₇ or host crystal of the composite oxide, (B) unstable 3d, 4d, It has a d or 4f electron shell and is made of a substance containing at least one metal ion selected from a rare earth metal ion and a transition metal ion capable of causing a radiative transition in the electron shell as a central ion of an emission center. A stress luminescent material is mentioned.

Further, as stress-stimulated luminescent particles, a carrier which is made of at least one aluminate having a non-stoichiometric composition described in JP-A-2001-49251 and which is excited by mechanical energy returns to the ground state. A stress luminescent material comprising a substance having lattice defects that emit light, or a substance containing at least one metal ion selected from a rare earth metal ion and a transition metal ion as a central ion of a luminescent center in the base material; , CaYAl ₃ O ₇ , Ca ₂ Al ₂ SiO ₇ , Ca ₂ (Mg, Fe) Si ₂ O ₇ , Ca ₂ B ₂ SiO ₇ , CaNaAlSi ₂ O having a melilite structure described in JP-A-2001-64638 _{7, Ca 2 MgSi 2 O 7} , (Ca, Na) 2 (Al, Mg) (Si, Al) 2 O 7, and Ca (Mg, Al) (Al, Si) in the base material consisting of one or more of the oxides of SiO _7, the rare earth or transition metal that emits light when electrons excited by mechanical energy return to the ground state 1 Materials disclosed in stress-stimulated luminescent materials and the like to which more than one kind of luminescent centers are added can be used.

In addition to the above stress-stimulated luminescent materials, when excited by light, electrons and holes (carriers) are trapped at trap levels caused by lattice defects in the host material, and stress is applied to the host material. And the trapped carriers are emitted and recombined to emit light.

For example, Japanese Unexamined Patent Application Publication No. 2014-173010 discloses an example of a stress luminescent material using at least one kind of aluminate having a non-stoichiometric composition as a base material having lattice defects. Here, the non-stoichiometric composition is a composition having a chemical composition formula deviating from the stoichiometric chemical composition formula, and as an aluminate having such a non-stoichiometric composition, The alkaline earth metal deficient type is composed of an alkaline earth metal oxide and an aluminum oxide, and the composition ratio of the alkaline earth metal ions is lost. The luminescent center element can be added in an amount sufficient to replenish the alkaline earth metal deficient in the composition ratio of the host material. These luminescent center elements include the lattice structure of the host material, the desired emission color, etc. According to, one or a combination of two or more can be added.

(Stress light emitting material used in this embodiment)
The stress-stimulated luminescent layer 2 used in the present embodiment may be anything as long as it emits light by applying stress, and such a stress-stimulated luminescent layer 2 is formed on the substrate 10 as a pattern corresponding to predetermined identification information. Good.
However, since the identification information is handled, it is preferable that the light emission intensity generated by applying the stress is a certain level or more and as stable as possible. Therefore, the best embodiment of the present invention will be described using a stress-stimulated luminescent material in which carriers are trapped in trap levels caused by lattice defects in the base material when irradiated with light of a predetermined wavelength. To do.

The stress-stimulated luminescent layer 2 used in the present embodiment is different from a general fluorescent luminescent material in that light is not basically generated when the stress-stimulated luminescent material is excited by irradiating light of a predetermined wavelength. However, depending on the composition of the stress-stimulated luminescent material, when the stress-stimulated luminescent material is irradiated with light of a predetermined wavelength, not all of the irradiated light energy is captured by the trap level, and a part of the irradiated light energy is fluorescent. There is also a possibility that light is emitted as emitted light. In this case, the light emission intensity by fluorescence emission is weaker than the light emission intensity generated when mechanical stress is applied to the stress-stimulated luminescent material excited by irradiation with light.
Therefore, the stress-stimulated luminescent material can be distinguished from a general fluorescent luminescent material.

Hereinafter, embodiments of the identification system of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 5 is a conceptual diagram showing a first embodiment of the system according to the present invention.
In FIG. 5, reference numerals 61 to 64 denote transport rollers for transporting the medium 1 to be identified, and transports the medium 1 in the order of the transport rollers 61, 62, 63 along the direction of the arrow Y <b> 1.
The roller 70 positioned next to the transport roller 63 is a part of the transport roller, and the roller 70 is combined with the stress applying unit 71 to form a stress applying device.

That is, the stress application device illustrated in the present embodiment includes a rotary stress application unit 71 on the side of the medium 1 where the stress light emitting layer 2 is formed, and a roller on the side where the stress light emitting layer 2 is not formed. 70, the medium 1 is sandwiched between the stress applying unit 71 and the roller 70, and the stress light emitting layer 2 of the medium 1 is formed at a pointed portion of the stress applying unit 71 in the process of transporting the medium 1 by a transport roller. Can be stressed. Mechanical energy is applied to the stress-stimulated light emitting layer 2 by the stress applied by the stress applying device, and a light emission phenomenon occurs.
After the stress is applied by the stress applying device, the medium 1 is transported along the direction of the arrow Y2 by the transport roller 64 and is finally discharged.

In FIG. 5, L1 is a light irradiation device that irradiates light of a predetermined wavelength. As the light irradiation device L1, a lamp emitting ultraviolet light is used, and the stress light emitting layer 2 of the present embodiment is irradiated with ultraviolet light.
d1 and d2 are photodetectors.
The photodetector d1 is for examining the presence / absence of light emitted from the stress-stimulated luminescent layer 2, the intensity of light, or the wavelength of the light when the stress-stimulated luminescent layer 2 is irradiated with ultraviolet light by the light irradiation device L1. For example, a photodiode, a phototransistor, a phototube, or a photomultiplier can be used.

The photodetector d2 is provided on the stress applying unit 71 side of the stress applying device, and when mechanical energy is applied to the stress light emitting layer 2 by the stress applying unit 71, the presence / absence of light emitted from the stress light emitting layer 2 is determined. In addition to examining the intensity or wavelength of light, the pattern of light emitted from the stress-stimulated luminescent layer 2 is detected, and identification information included in the pattern of light is detected. As the photodetector d2, for example, a photodiode, a phototransistor, a photoelectric tube, a photomultiplier tube, or a one-dimensional or two-dimensional image sensor can be used.

Of course, the photodetector d2 may only detect the identification information included in the light pattern without checking the presence or absence of light, the intensity of light, or the wavelength of light.

In FIG. 5, reference numeral 200 denotes a server. The server 200 is connected to the control device 100 wirelessly or by wire, and the server 200 stores a database (not shown) storing identification information for determination for comparing and determining the identification information detected by the photodetector d2. Z).

Each element of the light irradiation device L1, the photodetectors d1 and d2, the transport rollers 61 to 64, the stress application device (stress application unit 71, roller 70), and the server 200 is connected via the control device 100. It is controlled.

The control device 100 is equipped with a computer, a computer peripheral device, and various input / output interfaces, and is substantially operated by an information processing program that functions in cooperation with the computer.

FIG. 7 shows an example of a functional block diagram of the control device 100 for controlling the system of the present embodiment.
The control device 100 mainly includes a transport roller control unit 101, a control unit 102 for controlling the light irradiation device L1, a control unit 103 for controlling the photodetector d1, a stress application device (stress application unit 71, roller 70). ) By control means 104 for controlling), control means 105 for controlling photodetector d2, comparison judgment means 106 for comparing and judging identification information based on information detected by photodetector d2, and by the comparison judgment means The determination result display means 107 displays the determination result.

FIG. 8 is a flowchart showing an example of a processing procedure by an information processing program that functions in cooperation with a computer (not shown) constituting the control device 100.

<1> By the processing in step S1, the medium 1 to be identified is fed by the transport roller 61 and the transport of the medium 1 is started.

<2> Light irradiation by the light irradiation device L1 is performed on the first information recording area in which the stress-stimulated luminescent layer 2 is formed in the medium 1 by the processing in step S2.

<3> By the process of step S3, the light k1 emitted from the stress-stimulated luminescent layer 2 by the light irradiation is detected by the photodetector d1. At this time, not only the presence / absence of the light k1, but also the light intensity or the light wavelength may be examined.

<4> If the light k1 is not detected by the photodetector d1 by the process of step S4, that is, if the result of step S4 is “None”, the process proceeds to step S5.
That is, the medium 1 is transported to the stress applying device side by the transport rollers 62 and 63.
If the light k1 is detected, a message indicating that the light k1 has been detected is output and the process proceeds to step S5 (not shown).

<5> The stress applying device is configured for the first information recording area in which the stress light emitting layer 2 of the medium 1 that has been transported in the direction of the arrow Y1 by the transport rollers 62 and 63 is formed by the processing in step S5. The stress is applied by the stress applying unit 71 and the roller 70. As a result, mechanical energy is applied to the stress-stimulated luminescent layer 2, and light k2 is emitted.

<6> The light k2 is detected by the photodetector d2 by the process of step S6.

<7> If the light k2 is detected by the photodetector d2 by the process of step S7, that is, if the result of step S7 is “Yes”, the process proceeds to step S8.

If the light k2 is detected, a message indicating that the light k2 is not detected is output and the process proceeds to step S9 (not shown).

<8> The identification information included in the pattern of the light k2 is detected by the process of step S8.
The identification information included in the pattern of the light k2 is compared and determined by accessing the identification information for determination stored in the database of the server 200 via the comparison determination means 106 of the control device 100.
At this time, not only the identification information included in the pattern of the light k2 but also the intensity of light or the wavelength of light may be examined.
The result of the comparison determination is displayed via a determination result display means 107 (for example, a display device, a printer device, etc.) of the control device 100, and thereby the authenticity of the medium 1 is determined.

<9> By the process in step S9, the medium 1 is discharged by the transport roller 64 in the direction of the arrow Y2.
The series of processes is completed as described above, and the process returns to step S1.

(Embodiment 2)
FIG. 6 is a conceptual diagram showing a second embodiment of the system according to the present invention.
In the first embodiment, the identification information for determination is stored in the database of the server 200. However, in the second embodiment, an example in which the server 200 is not used is shown. .

That is, in the second embodiment, as shown in FIGS. 1 and 3, the medium 1 records the second information recording area A ₁₂ for recording identification information for determination other than the stress emission (FIG. 1). ) Or A ₂₂ (FIG. 3), and the determination identification information 12 (FIG. 1) or the determination identification information 22 (FIG. 3) recorded in the second information recording area is used. The authenticity of the identification information B ₁ (FIG. 1) or B ₂ (FIG. 3) using the stress emission recorded in the first information recording area A ₁₁ (FIG. 1) or A ₂₁ (FIG. 3) Judgment is made.
As described above, the second embodiment is the same as the first embodiment except for the difference in means for obtaining identification information for comparison determination.

As the identification information for determination other than the stress emission used in the second information recording area, for example, an optically readable identification represented by a character string, a barcode, a QR code (registered trademark), a hologram, or the like. Information. Further, electrically readable identification information using a contact IC module, a non-contact IC module, an RFID tag, or the like can be given.

Since the first information recording area is subjected to mechanical stress on the stress-stimulated luminescent layer, the second information recording area is preferably provided in an area where no mechanical stress is applied.

In the identification system of the second embodiment shown in FIG. 6, d3 is a detector that reads identification information for determination provided in the second information recording area.

If the identification information for determination provided in the second information recording area is optically readable identification information represented by a character string, a barcode, a QR code (registered trademark), a hologram, or the like, the detection is performed. As the detector d3, a detector d3 such as a photodiode, a phototransistor, a photoelectric tube, a photomultiplier tube, a one-dimensional or two-dimensional image sensor is used.

When the identification information for determination provided in the second information recording area is electrically readable identification information using a contact IC module, a non-contact IC module, an RFID tag, or the like, it corresponds to each standard. An electrical detector d3 is used.

In the second embodiment, step S8 of the processing flow in FIG. 8 is different from the first embodiment. That is, in the case of the second embodiment, when the identification information included in the pattern of the light k2 detected by the photodetector d2 is compared and determined, the detector d3 is passed through the comparison determination means 106 of the control device 100. A comparison determination is made using the identification information for determination detected in (1).

(Modification)
The present invention is not limited to the embodiments described above, and various modifications are possible, and these are also within the equivalent scope of the present invention. Examples include the following.

1) Implementation of a system using a medium of a type in which carriers are trapped in trap levels caused by lattice defects in the base material by irradiating light of a predetermined wavelength as a stress luminescent material used for the stress luminescent layer. Although the form has been described, in the case of a type that does not require light irradiation as a stress-stimulated luminescent material and excites mainly by mechanical energy to emit light, there is no need for a light irradiation device.

2) Although an example in which a rotary type stress applying unit is used as the stress applying device has been shown, as a form of the stress applying unit 71, for example, a blade-shaped member that moves up and down with respect to a medium to be identified is mechanical Stress may be applied.

(3) Further, when mechanical stress is applied to the medium to be identified by the stress applying device, the stress light emitting layer formed on at least the first information recording portion of the medium is scratched or perforated. You may make it open and destroy. This makes it impossible to reuse the medium.
In this way, when making the medium unusable, a sharp member may be provided on at least a part of the stress application unit 71.

The system according to the present invention can be used, for example, for identifying various kinds of cash vouchers, securities, tickets, cards, etc. or preventing unauthorized use.

1: medium, 2: stress light emitting layer, 3: light shielding layer, 10: base material,
61-64: Conveyance roller, 71: Stress application part,
100: control device, 200: server,
L1: Light irradiation device, d1, d2: Photo detector, d3: Detector

Claims (5)

In an identification system using a medium having at least a part of a stress-stimulated luminescent layer,
The stress light emitting layer is provided in a first information recording area that emits light including predetermined identification information by applying stress,
The system is at least
A stress applying device for applying stress to the first information recording area;
A photodetector for detecting light emitted from the first information recording area;
Comparison determination means for comparing and determining identification information detected by the photodetector and predetermined identification information;
An identification system comprising: 2. The identification system according to claim 1, further comprising a light irradiation device that irradiates light having a predetermined wavelength to the stress light-emitting layer in the first information recording area. 2. The medium according to claim 1, wherein the medium is capable of recording an image in at least a part of the area, and identification information is given to the first information recording area by recording the image. 2. The identification system according to 2. The medium further includes a second information recording area, and identification information corresponding to identification information included in light emitted from the first information recording area is recorded in the second information recording area. The identification system according to any one of claims 1 to 3. The system includes a predetermined database, and identification information corresponding to identification information included in light emitted from the first information recording area is stored in the database. 4. The identification system according to any one of 3.

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