JP2013190729A - Hologram laminate and information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hologram laminate capable of adding high security effect easily.SOLUTION: A hologram label 1a is formed, with a hologram layer 15 as the top layer, by stacking an infrared transmitting and invisible light reflecting/absorbing layer 13, a base material layer 11, an infrared ray fluorescent layer 17, and an adhesive layer 19 in this order below the top layer. When this hologram label 1a is attached on image information 23 formed in ink which absorbs infrared rays in an information recording medium 20, the image information 23 becomes invisible by the infrared transmitting and invisible light reflecting/absorbing layer 13. On the other hand, by irradiating this information recording medium 20 with excitation light by infrared rays, the image information 23 can be read; and by combining the hologram of the hologram layer 15 with the reading of the image information 23 by infrared rays, high security can be added to the information recording medium 20.

Description

  The present invention relates to a hologram laminated body in which hologram layers and the like are laminated.

  Image information such as barcodes that cannot be seen with the naked eye is applied to various media, and as a technology for reading this, the image information is printed with ink that absorbs infrared light, and this is excited with infrared light to emit infrared light, and Patent Documents 1 and 2 disclose concealment using a material that transmits infrared rays and does not transmit visible light. This image information is invisible but can be read by infrared rays and can be used for various security applications.

  On the other hand, there is a hologram that is also used for security purposes. A hologram is a waveform in which light reflected from an object using a laser or the like is interfered with reference light and recorded as interference fringes on a photosensitive material. When this is viewed under reference light, an image of the object is obtained. Visible. Holograms are often used for security purposes because it is difficult to duplicate the same design. Patent Document 3 shows an example of such a hologram.

Registered Utility Model No. 3013328 JP 2001-96889 A JP 2011-141881 A

  However, in both methods of Patent Documents 1 and 2, the image information is formed with ink that absorbs infrared rays, and then the above material is formed on the image information, which is necessary after the medium is manufactured. There is a problem that there is no degree of freedom for protecting image information.

On the other hand, the hologram has the above-described security effect, but it may be duplicated due to the advancement of counterfeiting techniques, and as a technique using the hologram, a contrivance that further increases security is required.
Similarly in the case of infrared reading of the image information described above, it is desirable to further improve security.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a hologram laminate that can easily impart a high security effect to a medium.

  A first invention for achieving the above-mentioned object is a hologram laminate attached to an information recording medium having image information formed of a material that absorbs infrared rays, which transmits infrared rays and reflects or absorbs visible light. A hologram laminate, comprising: a layer including a material to be irradiated; and an infrared fluorescent layer including a phosphor that is excited by infrared excitation light and emits infrared light having a peak wavelength different from that of the excitation light. Is the body.

By attaching the hologram laminate of the first invention to an information recording medium having image information formed of a material that absorbs infrared rays, the image information can be made invisible. On the other hand, when this is irradiated with infrared excitation light, the infrared fluorescent layer of the hologram laminate is excited by excitation light to emit infrared light, while the image information portion of the information recording medium absorbs infrared light. Therefore, if imaging is performed by receiving infrared light emitted from the infrared fluorescent layer, it is possible to read the image information from the luminance difference between the image information portion and the infrared fluorescent layer portion that appears on the imaging data. Become.
In addition, the hologram laminate only needs to be attached by selecting image information that needs to be invisible after the information recording medium is created. This makes it possible to provide the information recording medium with double security by viewing the hologram and reading image information with infrared rays.

In addition, it is preferable that a base material layer is provided under a layer containing a material that transmits infrared light and reflects or absorbs visible light, and the infrared fluorescent layer is provided under the base material layer.
By affixing this hologram laminate to the information recording medium, the infrared fluorescent layer becomes close to image information, and the outline of the image information becomes clearer when reading with infrared rays, so that reading is facilitated.

In addition, a layer including a material that transmits infrared light and reflects or absorbs visible light is provided under the infrared fluorescent layer, and below the layer including a material that transmits infrared light and reflects or absorbs visible light. It is also desirable that a base material layer is provided.
Alternatively, it is also desirable that the infrared fluorescent layer is provided under a layer containing a material that transmits infrared light and reflects or absorbs visible light, and a base material layer is provided under the infrared fluorescent layer.
In the case of the former, since the layer structure generally distributed as the base material of the hologram can be used for the production of the hologram laminate, there is an advantage that it is convenient at the time of manufacture, and in the case of the latter, the hologram is easy to see. There is an advantage that the visual verification of the hologram is easy.

In the hologram laminate of the first invention, it is desirable that the adhesive layer is provided as the lowermost layer.
Thereby, a hologram laminated body can be easily affixed on an information recording medium.

  A second invention is an infrared fluorescent layer including a layer containing a material that transmits infrared light and reflects or absorbs visible light, and a phosphor that is excited by infrared excitation light and emits infrared light having a peak wavelength different from that of the excitation light. Is a hologram laminate, which is provided under the hologram layer and has therein image information formed of a material that absorbs infrared rays.

  In this way, it is possible to form image information that is difficult to see from the hologram layer side and can be read by infrared rays in the hologram laminate itself. Thereby, the security of the hologram itself can be enhanced by the combination of visual observation of the hologram and reading of image information by infrared rays, and counterfeiting can be prevented. Therefore, high security can be imparted to the information recording medium to which this is attached.

  3rd invention has the image information formed with the material which absorbs infrared rays, a layer containing the material which permeate | transmits infrared rays and reflects or absorbs visible light, and is excited by excitation light by infrared rays, and is different from excitation light An information recording characterized in that a hologram laminate in which an infrared fluorescent layer including a fluorescent substance emitting infrared light having a peak wavelength is provided under the hologram layer is attached on the image information. It is a medium.

  In the information recording medium of the third invention, security is enhanced as described above by attaching the hologram laminate of the first invention on the image information that absorbs infrared rays.

  According to the present invention, it is possible to provide a hologram laminate that can easily impart a high security effect to a medium.

The figure which shows the hologram label 1a The figure which shows the information recording medium 20 with which the hologram label 1a was attached | subjected. The figure which shows the readers 50 and 58 The figure which shows the image data 90 The figure which shows the information recording medium 20 with which the hologram label 1b and the hologram label 1b were attached | subjected The figure which shows the information recording medium 20 with which the hologram label 1c and the hologram label 1c were attached | subjected The figure which shows the hologram label 2a The figure shown about creation of hologram label 2a The figure which shows the image data 90a The figure which shows the formation position of image information 31b-31h The figure which shows the hologram label 2b The figure which shows the hologram label 2c

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

[First Embodiment]
(Configuration of hologram label, etc.)
FIG. 1 is a view showing a hologram label 1a which is a hologram laminate according to the first embodiment of the present invention.

  As shown in FIG. 1, the hologram label 1a has a hologram layer 15 as the uppermost layer, and an infrared transmission / visible light reflection / absorption layer 13, a base material layer 11, an infrared fluorescent layer 17, and an adhesive layer 19 in that order. Overlaid.

  The base material layer 11 is a resin film such as polyethylene terephthalate (PET). However, the material is not limited to this, and various materials can be used.

The infrared transmission / visible light reflection / absorption layer 13 is a layer that transmits infrared light and reflects or absorbs visible light. In this embodiment, a layer of Bk (black) color in which materials such as C (cyan), M (magenta), and Y (yellow) are dispersed is used. This layer also functions as a reflection / absorption layer generally used for improving the appearance of the hologram of the hologram layer 15.
However, the infrared transmissive / visible light reflecting / absorbing layer 13 is not limited to this, and it is only necessary to include a material that transmits infrared light and reflects or absorbs visible light. For example, a metal thin film can be used in order to further improve the appearance of the hologram.

  As the hologram layer 15, a known technique such as Patent Document 3 can be used. In brief, a photopolymerizable compound such as ethylene glycol diacrylate is exposed to a laser beam and polymerized to interfere with the hologram layer 15. It is possible to use those in which fringes are recorded, or those in which uneven shapes corresponding to interference fringes are recorded on a thermosetting resin such as an unsaturated polyester resin.

  The infrared fluorescent layer 17 is a layer including a phosphor that is excited by irradiating infrared light as excitation light and emits infrared light having a peak wavelength different from that of the excitation light, and can be formed of a fluorescent material having such a phosphor. . For example, it can be formed using SG-YS manufactured by Nemoto Special Chemical Co., Ltd.

  The pressure-sensitive adhesive layer 19 is a layer provided as the lowermost layer for attaching the hologram label 1a to a target. For example, a heat-sensitive adhesive or a pressure-sensitive adhesive can be used. Examples of the heat sensitive adhesive include ethylene-vinyl acetate copolymer resin (EVA), and examples of the pressure sensitive adhesive include acrylic adhesive, rubber adhesive, and the like.

  The base material layer 11, the hologram layer 15, and the adhesive layer 19 are made of a material that transmits infrared rays. Further, the infrared fluorescent layer 17 other than the phosphor transmits infrared and visible light.

  As shown in FIG. 2, the hologram label 1 a is used by being attached to the information recording medium 20. The information recording medium 20 is obtained by forming image information 23 on a base material 21, and the hologram label 1 a is attached so as to cover the image information 23.

  The base material 21 is, for example, various paper materials for printing, but the material is not particularly limited.

  The image information 23 is formed by printing with ink containing a material that absorbs infrared rays such as carbon. In this embodiment, printing is generally performed using black ink containing carbon that is generally used. However, the present invention is not limited to this, and the image information 23 is formed using any material that absorbs infrared rays. can do. As the image information 23, various information such as a barcode, a two-dimensional code, an OCR number, an OCR character, a number, a character, a picture, a symbol, and the like can be recorded.

As shown in FIG. 2, when the hologram label 1a is pasted so as to cover the image information 23 of the information recording medium 20, the image information 23 is invisible from the outside by the infrared transmission / visible light reflection / absorption layer 13 or the like. It becomes.
On the other hand, the image information 23 of the information recording medium 20 can be read by irradiating the information recording medium 20 with the hologram label 1a attached thereto with excitation light of infrared rays. Hereinafter, reading using infrared rays will be described.

(Reading image information 23)
FIG. 3 is a diagram illustrating a configuration example of a reading device for reading the image information 23 of the information recording medium 20 to which the hologram label 1a is attached.
As shown in FIG. 3A, the image information 23 is read using a reading device 50 including an infrared irradiation device 51, an infrared camera 55, a filter 53, and the like. A result read by the reading device 50 is input as image data to an external information processing device 57 connected to the infrared camera 55, and processing such as image processing and authentication is performed.

The infrared irradiation device 51 is, for example, a light emitting diode or the like, and irradiates the information recording medium 20 with infrared rays as excitation light.
The infrared camera 55 receives the infrared light emitted from the phosphor of the infrared fluorescent layer 17 of the hologram label 1a excited by the excitation light by the light receiving element, and converts the amount of light received by each light receiving element into a luminance value on the image. It is an infrared imaging device. The infrared camera 55 is not particularly limited as long as it has sensitivity in the infrared region.

  The filter 53 is provided on the light receiving surface of the infrared camera 55, and cuts the infrared rays that the infrared irradiation device 51 emits as excitation light in order to receive only the infrared rays emitted from the infrared fluorescent layer 17.

As the excitation light irradiated from the infrared irradiation device 51, for example, infrared light having a peak wavelength of 750 to 900 nm is used, and the infrared fluorescent layer 17 of the hologram label 1a is excited by the excitation light and emits infrared light emitted by the excitation. A fluorescent material having a peak wavelength of 901 to 1100 nm is used.
As the filter 53, for example, by using a filter that transmits only infrared rays having a wavelength of 901 nm or more, the excitation light from the infrared irradiation device 51 is cut, and only the infrared rays emitted from the infrared fluorescent layer 17 are received by the infrared camera 55 and imaged. It can be performed.

  The infrared fluorescent layer 17 of the hologram label 1a is not limited to the above, and a known material having a different peak wavelength of excitation light and a peak wavelength of infrared light emitted by excitation may be used as appropriate. The filter 53 is not limited to the above, and a known filter that cuts the peak wavelength of the excitation light and transmits the peak wavelength of infrared light emitted by excitation may be used as appropriate.

  The information processing apparatus 57 includes a control unit including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a storage unit, an input / output unit of a peripheral device, and the like. By executing the stored image processing software, authentication software, and the like, the image data acquired from the infrared camera 55 is read and authenticated by image processing.

  The example of FIG. 3A is a separation-type example in which the reading device 50 is connected to an external information processing device 57. As the reading device, as shown in the reading device 58 of FIG. The integrated information processing device 57 may be incorporated therein. The other configuration of the reading device 58 is the same as that shown in FIG.

  When reading the image information 23 of the information recording medium 20 to which the hologram label 1a is attached, first, the reading device 50 irradiates the information recording medium 20 from the infrared irradiation device 51 with excitation light by infrared rays. Then, in the hologram label 1 a attached to the information recording medium 20, the phosphor of the infrared fluorescent layer 17 is excited by the excitation light transmitted through the hologram layer 15, the infrared transmission / visible light reflection / absorption layer 13, and the base material layer 11. Infrared light having a peak wavelength different from that of the excitation light is emitted. Since this infrared ray passes through each of the above layers, the infrared ray can be received by the infrared camera 55 through the filter 53 and imaged. The information processing device 57 performs image processing on the image data captured in this way, and acquires image information 23.

  FIG. 4 shows an example of image data 90 captured by the infrared camera 55. By irradiating the excitation light, the infrared fluorescent layer 17 emits infrared light, so that it appears as a high-luminance part on the image data 90 except for the part where the image information 23 exists below. On the other hand, since the portion of the image information 23 absorbs infrared rays, it appears clearly on the image data 90 as a portion having a lower luminance than the surroundings.

  Although the infrared fluorescent layer 17 exists above the image information 23, the portion of the image information 23 appears as a low-luminance portion on the image data 90 is dispersed in the fluorescent material forming the infrared fluorescent layer 17. The amount of the phosphor contained is about a little less than half of the whole, and the lower image information 23 appears on the image in a portion other than the phosphor of the infrared phosphor layer 17. At this time, the infrared light emitted from the phosphor is based on This is because the portion of the image information 23 in which the infrared ray is absorbed is lower than the portion other than the image information 23 that is reflected on the material 21 and incident on the infrared camera 55.

  The image information 23 can be read from the image data 90 obtained by imaging the information recording medium 20 by the brightness difference between the two parts and the clarity of the outline of the image information 23. Further, the fact that the entire image data is brightened by the infrared fluorescent layer 17 is convenient for reading the information recording medium 20 to which the hologram label 1a is attached. Note that a portion where the hologram label 1a is not attached appears on the image data 90 as a low-luminance portion.

According to the first embodiment described above, the hologram label 1a is affixed to the information recording medium 20, so that the hologram of the hologram layer 15 is visually observed and the image information 23 that cannot be viewed is read by infrared rays. A security effect can be achieved, and high security is imparted to the information recording medium 20.
In addition, the hologram label 1a is formed by printing the image information 23 on the base material 21 to create the information recording medium 20, and then affixing it later to the portion of the image information 23 that is not desired to be visually checked. Protection is easy.
Further, since the image information 23 and the infrared fluorescent layer 17 are close to each other, the outline of the image information 23 becomes clearer when reading with infrared rays, and the reading of the image information 23 is easy.

  The adhesive layer 19 of the hologram label 1a can be omitted. In this case, if the information recording medium 20 is provided with an adhesive layer or the like, the hologram label 1a can be attached. Further, the means for attaching the hologram label 1a to the information recording medium 20 is not limited to being attached with an adhesive or the like.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a diagram showing a hologram label 1b according to the second embodiment of the present invention. FIG. 5A is a diagram illustrating a cross-sectional configuration of the hologram label 1b, and FIG. 5B is a diagram illustrating the information recording medium 20 to which the hologram label 1b is attached.

  The hologram label 1b of the second embodiment is different from the hologram label 1a of the first embodiment in that an infrared fluorescent layer 17 is provided between the hologram layer 15 and the infrared transmission / visible light reflection / absorption layer 13. Since other points are the same as those of the first embodiment, description thereof is omitted.

Similarly to the first embodiment, the information recording medium 20 with the hologram label 1b attached thereto can read invisible image information 23 with infrared rays, and is provided with high security in combination with visual observation of the hologram. .
Further, in the hologram label 1b of the second embodiment, the adhesive layer 19, the base material layer 11, and the infrared transmission / visible light reflection / absorption layer 13 which is a Bk color layer are adjacent to each other. Is one of those generally used as a base material for holograms, and this can be used, which has the effect of reducing costs during production.

[Third Embodiment]
FIG. 6 is a diagram showing a hologram label 1c according to the third embodiment of the present invention. 6A is a diagram showing a cross-sectional configuration of the hologram label 1c, and FIG. 6B is a diagram showing the information recording medium 20 to which the hologram label 1c is attached.

  The hologram label 1c of the third embodiment is different from the hologram label 1a of the first embodiment in that the positions of the base material layer 11 and the infrared fluorescent layer 17 are exchanged up and down. Since other points are the same as those of the first embodiment, description thereof is omitted.

Similarly to the first embodiment, the information recording medium 20 with the hologram label 1c attached thereto can read invisible image information 23 with infrared rays, and is provided with high security in combination with visual observation of the hologram. .
Further, since the infrared transmission / visible light reflection / absorption layer 13 that functions as a reflection / absorption layer of the hologram is formed directly under the hologram layer 15, there is an advantage that the hologram is easier to see than the second embodiment.

[Fourth Embodiment]
(Configuration of hologram label)
FIG. 7 is a view showing a hologram label 2a according to the fourth embodiment of the present invention.
As shown in the figure, the layer structure of the hologram label 2a is the same as that of the hologram label 1a of the first embodiment. It differs in that it is formed. The image information 31a is formed by printing with black ink containing carbon, similar to the image information 23 described above. 31a can be formed.

  As shown in FIG. 8A, the hologram label 2a is formed in advance by sequentially laminating a hologram layer 15, an infrared transmission / visible light reflection / absorption layer 13, and a base material layer 11 on a film 61. After forming the image information 31a on the surface of the base material layer 11 as shown in FIG. 8 (b), the infrared fluorescent layer 17 and the adhesive layer 19 are sequentially stacked on the image information 31a as shown in FIG. 8 (c). It can be formed by peeling off the film 61.

(Reading of image information 31a)
The image information 31a is also invisible from the hologram layer 15 side by the infrared transmission / visible light reflection / absorption layer 13 or the like, but can be read using infrared rays in the same manner as described above. FIG. 9 shows an example of image data 90a obtained by reading the image information 31a with infrared rays.
When reading the image information 31a, the hologram label 2a is irradiated with infrared excitation light as described above. Then, the excitation light transmitted through the hologram layer 15, the infrared transmission / visible light reflection / absorption layer 13, and the base material layer 11 excites the portion of the infrared fluorescent layer 17 except the portion on which the image information 31 a is formed. Infrared light is emitted, and this infrared light passes through the above layer, so that it appears as a high-luminance portion on the image data 90a. On the other hand, since the portion of the image information 31a absorbs excitation light, it appears in the image data 90a with a strong contrast as a portion having a lower luminance than the surroundings. Therefore, it can be read in the same manner as described above.

  As described above, the hologram label 2a itself can also be formed with the image information 31a that cannot be viewed from the hologram layer 15 side, and security is improved by combining the viewing of the hologram with the infrared reading of the image information 23. Can be improved. As a result, forgery of the hologram label 2a itself is prevented, and high security is imparted to the information recording medium to which the hologram label 2a is attached.

(Other examples of image information)
The position where the image information is formed in the hologram label 2a is not limited to the above example. Image information 31b to 31h in FIG. 10 shows examples of positions where image information can be formed in the hologram label 2a. As shown in the figure, in the hologram label 2a, it is possible to provide image information on each layer inside.

  The image information 31b, 31d, 31f, and 31g are formed on the top surface of the infrared transmission / visible light reflection / absorption layer 13, the base material layer 11, the infrared fluorescent layer 17, and the adhesive layer 19 on the hologram layer 15 side, respectively. is there.

In these cases, the image information is formed on the upper surface of the layer corresponding to the above image information, and then processed, and the layer below the adhesive layer 19 side of this layer is overlapped and the layer is removed from the layer. The hologram label 2a can be formed by overlapping the upper layers.
For example, in the case of the image information 31b, after the image information 31b is formed on the upper surface of the infrared transmission / visible light reflection / absorption layer 13, the base material layer 11, the infrared fluorescent layer 17, and the adhesive layer 19 are sequentially bonded to the lower surface. Further, the hologram label 2a can be formed by bonding the hologram layer 15 to the upper surface of the infrared transmission / visible light reflection / absorption layer 13.

  On the other hand, the image information 31c, 31e, and 31h are formed on the lower surface of the hologram layer 15, the infrared transmission / visible light reflection / absorption layer 13, and the infrared fluorescent layer 17, respectively.

  In these cases, for example, as in the case of the image information 31a described above, a film (not shown) in which layers from the hologram layer 15 to the layer corresponding to the image information are sequentially stacked is created in advance. After the image information is formed on the lower surface, the hologram label 2a can be formed by superimposing a lower layer from the layer on this surface.

  For example, in the case of the image information 31h, a film in which the hologram layer 15, the infrared transmission / visible light reflection / absorption layer 13, the base material layer 11, and the infrared fluorescent layer 17 are sequentially laminated is formed in advance. After the image information 31h is formed on the lower surface of the fluorescent layer 17, the adhesive layer 19 is finally attached to this surface, so that the hologram label 2a can be formed.

  However, the method of forming the hologram label 2a is not limited to these, and various methods can be used.

  As described above, the image information 31a to 31h can be provided in each layer inside the hologram label 2a. For example, among the image information 31a to 31h, the image information 31a to 31h is formed at the uppermost part or the lowermost part like the image information 31b and 31h. As described above, since the final process at the time of producing the hologram label 2a is only to bond one layer of the hologram layer 15 or the adhesive layer 19 as described above, there is an advantage that the production is easy.

Further, in the case where the image information 31a, 31d to 31h is formed below the infrared transmission / visible light reflection / absorption layer 13, the image information can be made invisible by this layer.
Note that the image information 31b and 31c formed above the infrared transmission / visible light reflection / absorption layer 13 is the same black color as that of the infrared transmission / visible light reflection / absorption layer 13 in the present embodiment. For some reason, this layer is difficult to see because of the background.

  Further, the image information 31a, 31f to 31h adjacent to the infrared fluorescent layer 17 has an advantage that the outline of the image information is clear and easy to read when reading with infrared rays.

[Fifth Embodiment]
FIG. 11 is a diagram showing a hologram label 2b according to the fifth embodiment of the present invention.
The hologram label 2b has the same layer configuration as that of the hologram label 1b of the second embodiment, but inside thereof, an image that absorbs infrared rays on the upper surface or the lower surface of one of the layers, as in the fourth embodiment. Any of the information 32a to 32h is formed.

  Similarly to the above, this hologram label 2b can read image information 32a to 32h that is difficult to view from the hologram layer 15 side using infrared rays, and can improve security in combination with viewing of the hologram.

[Sixth Embodiment]
FIG. 12 is a diagram showing a hologram label 2c according to the sixth embodiment of the present invention.
The hologram label 2c has the same layer configuration as that of the hologram label 1c of the third embodiment, but inside thereof, an image that absorbs infrared rays on the upper surface or the lower surface of one of the layers, as in the fourth embodiment. Any of the information 33a to 33h is formed.

  Similarly to the above, this hologram label 2c can also read image information 33a to 33h that is difficult to see from the hologram layer 15 side using infrared rays, and can improve security in combination with viewing of the hologram. .

  In the fifth and sixth embodiments, the method of forming the individual image information 32a to 33h and 33a to 33h is substantially the same as that of the fourth embodiment. Further, since the effects when the individual image information 32a to 32h and 33a to 33h are formed are substantially the same as those described above, the description thereof is omitted here.

  The hologram labels 2a to 2c described in the fourth to sixth embodiments are information recording media in which the image information 23 is formed on the base material 21 with a material that absorbs infrared rays, as in the first to third embodiments. In this case, for example, the image information 23 of the information recording medium 20 and the image information of the hologram labels 2a to 2c can be verified to perform authentication.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

1a, 1b, 1c, 2a, 2b, 2c ......... Hologram label 11 ......... Base layer 13 ......... Infrared transmission / visible light reflection / absorption layer 15 ......... Hologram layer 17 ......... Infrared fluorescent layer 19 ……… Adhesive layer 21 ……… Base layer 23, 31a to 31h, 32a to 32h, 33a to 33h ……… Image information

Claims (7)

A hologram laminate attached to an information recording medium having image information formed of a material that absorbs infrared rays,
A layer comprising a material that transmits infrared light and reflects or absorbs visible light;
An infrared phosphor layer including a phosphor that is excited by infrared excitation light and emits infrared light having a peak wavelength different from that of the excitation light;
A hologram laminate, which is provided under the hologram layer. A base material layer is provided under a layer containing a material that transmits infrared light and reflects or absorbs visible light,
The hologram laminate according to claim 1, wherein the infrared fluorescent layer is provided under the base material layer. A layer including a material that transmits infrared light and reflects or absorbs visible light is provided under the infrared fluorescent layer;
The hologram laminate according to claim 1, wherein a base material layer is provided under a layer containing a material that transmits infrared rays and reflects or absorbs visible light. The infrared fluorescent layer is provided under a layer containing a material that transmits infrared light and reflects or absorbs visible light,
The hologram laminate according to claim 1, wherein a base material layer is provided under the infrared fluorescent layer.   The hologram laminate according to claim 1, wherein an adhesive layer is provided as a lowermost layer. A layer comprising a material that transmits infrared light and reflects or absorbs visible light;
An infrared phosphor layer including a phosphor that is excited by infrared excitation light and emits infrared light having a peak wavelength different from that of the excitation light;
Provided under the hologram layer,
A hologram laminate having image information formed of a material that absorbs infrared rays therein. It has image information formed with a material that absorbs infrared rays,
A layer including a material that transmits infrared light and reflects or absorbs visible light and an infrared fluorescent layer including a phosphor that is excited by infrared excitation light and emits infrared light having a peak wavelength different from that of the excitation light are below the hologram layer. The hologram laminate provided in
An information recording medium attached on the image information.