WO2016080374A1 - Light-emitting medium and method for reading light-emitting medium - Google Patents

Light-emitting medium and method for reading light-emitting medium Download PDF

Info

Publication number
WO2016080374A1
WO2016080374A1 PCT/JP2015/082201 JP2015082201W WO2016080374A1 WO 2016080374 A1 WO2016080374 A1 WO 2016080374A1 JP 2015082201 W JP2015082201 W JP 2015082201W WO 2016080374 A1 WO2016080374 A1 WO 2016080374A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light emitter
wavelength region
infrared
ultraviolet
Prior art date
Application number
PCT/JP2015/082201
Other languages
French (fr)
Japanese (ja)
Inventor
祐子 青山
佐藤　潤
山内　豪
北村　満
Original Assignee
大日本印刷株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Priority to JP2016560228A priority Critical patent/JP6781953B2/en
Publication of WO2016080374A1 publication Critical patent/WO2016080374A1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation

Definitions

  • the present invention relates to a light emitting medium that emits two infrared rays in different wavelength regions or emits two ultraviolet rays in different wavelength regions when irradiated with infrared rays, ultraviolet rays, or visible light, and a reading method thereof.
  • a light emitting medium with a body has been developed.
  • a light emitting medium by irradiating the light emitter with invisible light, visible light is emitted from the light emitter, and the medium can be read by a general-purpose color printer or the like by reading visible light of different colors emitted from the light emitter. It can prevent forgery easily.
  • the present invention has been made in consideration of such points, and an object thereof is to provide a light emitting medium and a method for reading the light emitting medium that make it difficult to analyze light emitted from a light emitter.
  • the present invention includes a base material and a light emitter provided on the base material, and the light emitter emits a first infrared ray having a first wavelength region when irradiated with visible light, infrared light, or ultraviolet light.
  • a first light emitter and a second light emitter that emits a second infrared light having a second wavelength region; a first wavelength region of the first infrared light of the first light emitter; and a second infrared light of the second light emitter.
  • the light emitting medium is characterized in that the second wavelength region overlaps each other, and the first wavelength region of the first infrared ray of the first light emitter is narrower than the second wavelength region of the second infrared ray of the second light emitter.
  • the present invention is the light-emitting medium characterized in that the peak wavelength of the first wavelength region of the first infrared coincides with or approximates the peak wavelength of the second wavelength region of the second infrared.
  • the present invention includes a substrate and a light emitter provided on the substrate, and the light emitter emits first ultraviolet light having a first wavelength region when irradiated with visible light or ultraviolet light.
  • a second light emitter that emits second ultraviolet light having a light emitter and a second wavelength region; a first wavelength region of the first ultraviolet light of the first light emitter; and a second of the second ultraviolet light of the second light emitter.
  • the light emitting medium is characterized in that the wavelength regions overlap each other, and the first wavelength region of the first ultraviolet ray of the first light emitter is narrower than the second wavelength region of the second ultraviolet ray of the second light emitter.
  • the present invention is the light-emitting medium characterized in that the peak wavelength of the first wavelength region of the first ultraviolet ray matches or approximates the peak wavelength of the second wavelength region of the second ultraviolet ray.
  • the first light emitter includes a first pattern or character
  • the second light emitter includes a second pattern or character
  • the first light emitter and the second light emitter overlap each other.
  • the first light emitter includes a first pattern or character
  • the second light emitter includes a second pattern or character
  • the first light emitter and the second light emitter are separated from each other. It is the luminescent medium characterized by the above-mentioned.
  • the present invention is a light emitting medium characterized in that the first light emitter and the second light emitter are mixed with each other.
  • the present invention includes a base material and a light emitter provided on the base material, and the light emitter emits a first infrared ray having a first wavelength region when irradiated with visible light, infrared light, or ultraviolet light.
  • a first light emitter and a second light emitter that emits a second infrared light having a second wavelength region; a first wavelength region of the first infrared light of the first light emitter; and a second infrared light of the second light emitter.
  • a first wavelength region of the first infrared and the second red A step of reading the first infrared ray and the second infrared ray by a first infrared ray detection unit for reading a wavelength region where the second wavelength region of the line overlaps; and a second infrared ray detection unit for reading only the wavelength region of the second infrared ray. And a step of reading two infrared rays.
  • the present invention includes a substrate and a light emitter provided on the substrate, and the light emitter emits first ultraviolet light having a first wavelength region when irradiated with visible light or ultraviolet light.
  • a second light emitter that emits second ultraviolet light having a light emitter and a second wavelength region; a first wavelength region of the first ultraviolet light of the first light emitter; and a second of the second ultraviolet light of the second light emitter.
  • the present invention it is possible to provide a light emitting medium that makes it difficult to analyze light emitted from a light emitter, and a method for reading the light emitting medium.
  • FIG. 1 is a plan view showing an example of a light emitting medium of the present invention.
  • FIG. 2 is a side view showing a method for reading a light-emitting medium in the first embodiment of the present invention.
  • FIG. 3 is a side view showing a method for reading a light emitting medium.
  • 4 (a) and 4 (b) are diagrams showing an emission spectrum of the light emitter in the first embodiment of the present invention.
  • FIG. 5 is a side view showing a light emitting medium showing a modification of the first embodiment of the present invention.
  • FIG. 6 is a plan view showing a light emitting medium according to a modification of the present invention.
  • 7A and 7B are plan views showing a method for reading a light emitting medium according to a modification of the present invention.
  • FIG. 8 is a plan view showing a light emitting medium according to the second embodiment of the present invention.
  • FIG. 9 is a side view showing a light emitting medium according to the second embodiment of the present invention.
  • FIG. 1 is a diagram illustrating an example of an anti-counterfeit medium 10 according to the present embodiment, for example, a gift certificate (securities).
  • the anti-counterfeit medium 10 includes a base material 11 and a light emitter 12 formed on the base material 11.
  • the light emitter 12 functions as an authenticity determination image for determining the authenticity of the forgery prevention medium 10.
  • the light emitter 12 includes a first light emitter 12A that emits a first infrared ray a having a first wavelength region W1 when irradiated with visible light, infrared light, or ultraviolet light, and a second wavelength region.
  • a second light emitter 12B that emits a second infrared ray b having W2.
  • the wavelength region W1 of the first infrared ray a emitted from the first light emitter 12A and the wavelength region W2 of the second infrared ray b emitted from the second light emitter 12B overlap each other. Further, the wavelength region W1 of the first infrared ray a is narrower than the wavelength region W2 of the second infrared ray b. Furthermore, the peak wavelength of the wavelength region W1 of the first infrared ray a coincides with or approximates the peak wavelength of the wavelength region W2 of the second infrared ray b.
  • the material of the base material 11 used in the anti-counterfeit medium 10 is not particularly limited, and is appropriately selected according to the type of securities used as the anti-counterfeit medium 10.
  • white polyethylene terephthalate having excellent printability and processability is used as the material of the substrate 11.
  • the thickness of the base material 11 is appropriately set according to the type of securities constituted by the forgery prevention medium 10.
  • the size of the light emitter 12 is not particularly limited, and is appropriately set according to the ease of authenticity determination, the required determination accuracy, and the like.
  • the height and width of the region to which the light emitter 12 is clamped are in the range of 1 to 210 mm and 1 to 300 mm, respectively.
  • FIG. 1 is a plan view showing the light emitting medium 10
  • FIGS. 2 and 3 are side views showing a method for reading the light emitting medium 10.
  • the illuminant 12 provided on the substrate 11 has a first illuminant 12A that emits the first infrared ray a having the first wavelength region W1 when irradiated with visible light, infrared rays, or ultraviolet rays as described above. And a second light emitter 12B that emits the second infrared ray b having the second wavelength region W2.
  • the first light emitter 12A includes colorless first light emitter ink that emits the first infrared light a but does not emit visible light when irradiated with visible light, infrared light, or ultraviolet light. Further, in such first light emitter ink, the position for the first light emitter 12A can be easily confirmed to identify the infrared detection region, and the first light emitter 12A can be easily manufactured. For the above convenience, a desired amount of pigment may be mixed. Since this pigment emits fluorescence, it can be visually confirmed.
  • the second light emitter 12B contains colorless second light emitter ink that emits the second infrared ray b but does not emit visible light when irradiated with visible light, infrared light, or ultraviolet light.
  • second light emitter ink it is possible to easily confirm the position of the second light emitter 2B to identify the infrared detection region, and to manufacture the second light emitter 12B easily.
  • a desired amount of pigment may be mixed. Since this pigment emits fluorescence, it can be visually confirmed.
  • the first light emitter 12A is made of the first light emitter ink containing the pigment
  • the second light emitter 12B is made of the second light emitter ink containing the pigment, so that the first light emitter 12A and the first light emitter 12A
  • the two light emitters 12B are irradiated with visible light, infrared rays or ultraviolet rays
  • the first infrared rays a having the first wavelength region W1 can be emitted from the first light emitters 12A
  • the second wavelength regions from the second light emitter 12B can be emitted.
  • the first wavelength region W1 of the first infrared ray a overlaps the second wavelength region W2 of the second infrared ray b, but the first wavelength region W1 of the first infrared ray a is the second wavelength region of the second infrared ray b. Narrower than W2.
  • the peak wavelength of the first wavelength region W1 of the first infrared ray a coincides with or approximates the peak wavelength of the second wavelength region W2 of the second infrared ray b.
  • the first wavelength region W1 of the first infrared ray a has a width of about 20 nm centered on, for example, 900 nm (see FIG. 4A).
  • the second wavelength region W2 of the second infrared ray b has a width of about 100 to 200 nm with 900 nm as the center, for example.
  • the peak wavelengths of the first wavelength region W1 and the second wavelength region W2 do not need to be completely coincident with each other”, and a certain width, for example, is narrow between the two peak wavelengths.
  • the width between the peak wavelengths of the first wavelength region W1 and the second wavelength region W2 is larger than the width of the first wavelength region W1, the reading operation of the fluorescent medium described later cannot be performed with high accuracy. On the other hand, it is difficult in manufacturing to make the width between the peak wavelengths of the first wavelength region W1 and the second wavelength region W2 completely coincide.
  • the peak wavelength between the first wavelength region W1 and the second wavelength region W2 has a certain width as described above.
  • the first light emitter 12A and the second light emitter 12B of the light emitter 12 having the structure as described above are formed separately from each other on the substrate 11 (see FIG. 1).
  • the pattern of the first illuminant 12A and the pattern of the second illuminant 12B are separated and do not overlap, but may be closely aligned with no gaps (tweeping structure).
  • the first light emitter 12A includes twelve round shapes arranged in an annular shape
  • the second light emitter 12B includes four pieces provided inside the round shape of the twelve first issuers 12A. Including a round shape.
  • the 12 round shapes of the first light emitter 12A constitute a first picture or character
  • the four round shapes of the second light emitter 12B constitute a second picture or character.
  • a light emitting medium 10 having a base 11 and a light emitter 12 including a first light emitter 12A and a second light emitter 12B provided on the base 11 is prepared.
  • the light emitting medium 10 is irradiated with visible light, infrared light, or ultraviolet light from the irradiation unit 20.
  • the first infrared ray a having the first wavelength region W1 is emitted from the first light emitter 12A.
  • the second infrared ray b having the second wavelength region W2 is emitted from the second light emitter 12B.
  • the first infrared ray a emitted from the first light emitter 12A and the second infrared ray b emitted from the second light emitter 21B are detected by the infrared detector 21 provided integrally with the irradiation unit 20.
  • the infrared detecting unit 21 is set to a first infrared detecting unit mode that reads a wavelength region where the first wavelength region W1 of the first infrared ray a and the second wavelength region W2 of the second infrared ray b overlap (see FIG. 2). .
  • the detection wavelength W0 of the infrared detection unit 21 has a center wavelength ⁇ 1 (see FIG. 4A), and the infrared detection unit 21 causes the first infrared a and the second light emission emitted from the first light emitter 12A. Both of the second infrared rays b emitted from 12B can be read, and the image read by the infrared detector 21 is displayed on the monitor 23.
  • the monitor 23 includes a first pattern or character of the first light emitter 12A having 12 round shapes arranged in a ring and four round shapes arranged inside the first light emitter 12A.
  • a second pattern or character of the second light emitter 12B is displayed.
  • the infrared detector 21 is set to a second infrared detector mode that reads only the second wavelength region W2 of the second infrared b (see FIG. 3).
  • the detection wavelength W0 of the infrared detection unit 21 has a center wavelength ⁇ 2 (see FIG. 4A), and the infrared detection unit 21 can read only the second infrared ray b emitted from the second light emitter 12B.
  • the image read by the infrared detector 21 is displayed on the monitor 23.
  • the light emission intensities of the first light emitter 12A and the second light emitter 12B are combined, that is, whether the light emission intensity of the pigment itself is set to the same level and printed with the same print density If the emission intensity of the pigment itself is different, or if the emission intensity of the first luminous body 12A and the second luminous body 12B is matched by adjusting the density and adjusting the luminous intensity during printing, the first luminous body 12A and the first luminous body
  • the two light emitters 12B are more preferable in terms of prevention of forgery because the density on the image is observed in the same manner.
  • the light emitting medium 10 is irradiated with visible light, infrared light, or ultraviolet light from the irradiation unit 20, and the detection wavelength mode of the infrared detection unit 21 has the detection wavelength W0 having the center wavelength ⁇ 1. Only by switching between the first infrared detector mode and the second infrared detector mode in which the detection wavelength W0 has the center wavelength ⁇ 2, the second light emitter can be read from the state of reading both the first light emitter 12A and the second light emitter 12B. It is possible to easily switch to a state where only 12B is read.
  • the detection unit mode of the infrared detection unit 21 is switched as described above, only when the state of reading both the first light emitter 12A and the second light emitter 12B is switched to the state of reading only the second light emitter 12B. Therefore, it can be determined that the light emitting medium 10 is authentic.
  • the wavelength region W1 of the first infrared ray a emitted from the first light emitter 12A and the wavelength region W2 of the second infrared ray b emitted from the second light emitter 12B overlap each other, and although the peak wavelength of the 1st light emission line a and the peak wavelength of the 2nd infrared rays b showed the example which approximates or approximates, as shown in FIG.4 (b), the wavelength range W1 of the 1st infrared rays a and the 2nd infrared rays b are shown.
  • the peak wavelength of the first infrared ray a and the peak wavelength of the second infrared ray b may differ from each other by, for example, about 50 nm.
  • the light emitting medium 10 is irradiated with visible light, infrared light, or ultraviolet light from the irradiation unit 20, and the detection unit mode of the infrared detection unit 21 is the first infrared detection unit having the detection wavelength W0 having the center wavelength ⁇ 1.
  • both the first light emitter 12A and the second light emitter 12B can be read, and when the mode is switched to the second infrared detector mode in which the detection wavelength W0 has the center wavelength ⁇ 2, the second light emitter 12B. Can only read.
  • the detection unit mode of the infrared detection unit 21 is switched, and both the first light emitter 12A and the second light emitter 12B are changed from the state where only the second light emitter 12B is read.
  • the reading state is switched, the light emitting medium 10 can be determined to be authentic.
  • the wavelength region W1 of the first infrared ray a emitted from the first light emitter 12A of the light emitter 12, and the second infrared ray b emitted from the second light emitter 12B of the light emitter 12. are overlapped with each other, and the peak wavelength of the first infrared ray a and the peak wavelength of the second infrared ray b are the same or approximate. For this reason, compared with the case where the light emitter 12 emits two types of light whose wavelength regions are significantly different from each other, the light emitter 12 emits two types of light, the first infrared ray a and the second infrared ray b. It is difficult for a third party to analyze and find out. For this reason, it is more difficult to forge the light emitting medium 10.
  • the example in which the light emitter 12 provided on the substrate 11 has the first light emitter 12A and the second light emitter 12B separated from each other on the substrate 11 has been shown.
  • the first light emitter 12A may be first formed on the substrate 11, and the second light emitter 12B having a smaller shape than the first light emitter 12A may be formed on the first light emitter 12A (FIG. 5). reference).
  • the infrared detection unit 21 when the infrared detection unit 21 is in the first infrared detection unit mode, the second pattern or character of the second light emitter 12B and the second pattern or character of the second light emitter 12B are located around the second pattern or character.
  • the first pattern or character of the first light emitter 12A is displayed.
  • the infrared detector 21 is in the second infrared detector mode, only the second picture or character of the second light emitter 12B is displayed.
  • the first light emitter 12A having 12 round shapes in which the light emitters 12 on the substrate 11 are arranged in a ring shape, and four round shapes arranged in the 12 round shapes.
  • the example having the second light emitter 12B is shown, the light emitter 12 is not limited to this, and the light emitter 12 has the first light emitter 12A having the first picture or character, for example, “A” and “C”, and the second picture or character.
  • the infrared detection unit 21 when the infrared detection unit 21 is set to the first infrared display unit mode, the first pattern or characters of the first light emitter 12A, “A” and “C”, and the second pattern of the second light emitter 12B or Both the character and “B” are displayed on the monitor 23 (see FIG. 7A).
  • the infrared detection unit 21 when the infrared detection unit 21 is set to the second infrared display unit mode, only the second pattern or character “B” of the second light emitter 12B is displayed on the monitor 23 (see FIG. 7B). In this case, the pattern may be fine micro characters.
  • the light emitter 12 on the substrate 11 includes the first light emitter 12A and the second light emitter 12B, and the first light emitter 12A and the second light emitter.
  • 12B is different from each other, other configurations are substantially the same as those of the first embodiment shown in FIGS.
  • the first light emitter 12A when the light emitter 12 is irradiated with visible light, infrared light, or ultraviolet light, the first light emitter 12A emits the first infrared light a having the first wavelength region W1, and the second light emitter B emits the first light.
  • the second infrared ray b having the two wavelength region W2 is emitted.
  • the light emitter 12 having such a configuration includes the first light emitter ink and the second light emitter ink, and can further confirm the position of the light emitter 12 and is mixed for convenience in manufacturing.
  • the first light emitter ink, the second light emitter ink, and the pigment are mixed in the light emitter 12 including the pigment. Since this pigment emits fluorescence, it can be visually confirmed.
  • Both of the second infrared rays b emitted from 12B can be detected (see FIG. 4A).
  • the second infrared ray b emitted from the second light emitter 12B of the light emitter 12 can be detected by the second infrared detector mode in which the detection wavelength W0 has the center wavelength ⁇ 2.
  • the light emission medium 10 is read by using both the first infrared detection unit mode in which the detection wavelength W0 has the center wavelength ⁇ 1 and the second infrared detection unit mode in which the detection wavelength W0 has the center wavelength ⁇ 2. It can be easily confirmed that the body 12 includes the first light emitter 12A and the second light emitter 12B mixed together.
  • the second light emitter 12B emits the second infrared ray b having the second wavelength region W2, but the light emitter 12 emits visible light or ultraviolet light to the light emitter 12.
  • the first light emitter 12A that emits the first ultraviolet light having the first wavelength region and the second light emitter 12B that emits the second ultraviolet light having the second wavelength region may be included.
  • the first wavelength region of the first ultraviolet ray is narrower than the second wavelength region of the second ultraviolet ray, and the peak wavelength of the first wavelength region of the first ultraviolet ray is the peak wavelength of the second wavelength region of the second ultraviolet ray. Match or approximate.
  • Base material 12 Light emitter 12A 1st light emitter 12B 2nd light emitter 20 Irradiation part 21 Infrared detection part 23 Monitor a 1st infrared ray b 2nd infrared ray (lambda) 1 detection wavelength (lambda) 2 detection wavelength

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

[Problem] To provide a light-emitting medium for which analysis of the light emitted from light emitters is difficult. [Solution] A light-emitting medium 10 is provided with a base material 11 and light emitters 12. The light emitters 12 comprise first light-emitters 12A that emit a first infrared beam a when irradiated with visible or infrared light and second light emitters 12b that emit a second infrared beam b. The wavelength region W1 of the first infrared beam a overlaps the wavelength region W2 of the second infrared beam b and the wavelength region W1 of the first infrared beam a is narrower than the wavelength region W2 of the second infrared beam b.

Description

発光媒体および発光媒体の読み取り方法Luminescent medium and method for reading luminescent medium
　本発明は、赤外線、紫外線または可視光が照射されたときに異なる波長領域の２つの赤外線を発光するか、または異なる波長領域の２つの紫外線を発光する発光媒体、およびその読み取り方法に関する。 The present invention relates to a light emitting medium that emits two infrared rays in different wavelength regions or emits two ultraviolet rays in different wavelength regions when irradiated with infrared rays, ultraviolet rays, or visible light, and a reading method thereof.
　金券やプリペイドカードを含む有価証券や、免許証を含む身分証明書など、偽造を防止することが必要とされる媒体において、セキュリティ性を高めるため、基材と、基材上に設けられた発光体とを備えた発光媒体が開発されている。このような発光媒体において、発光体に不可視光を照射することにより、発光体から可視光を発光させ、発光体から発光される異なる色の可視光を読み取ることにより媒体が汎用のカラープリンターなどにより容易に偽造されるのを防ぐことができる。 To enhance security in media that require prevention of counterfeiting, such as securities including gold vouchers and prepaid cards, and identification cards including licenses, the base material and the light emission provided on the base material A light emitting medium with a body has been developed. In such a light emitting medium, by irradiating the light emitter with invisible light, visible light is emitted from the light emitter, and the medium can be read by a general-purpose color printer or the like by reading visible light of different colors emitted from the light emitter. It can prevent forgery easily.
　また、近年では偽造防止効果をさらに高めるため、発光体から発光される光の解析がより困難となる発光媒体の開発が求められている。 Further, in recent years, in order to further enhance the effect of preventing forgery, development of a light emitting medium that makes analysis of light emitted from a light emitter more difficult has been demanded.
特許第５５４１５８号公報Japanese Patent No. 554158
　本発明は、このような点を考慮してなされたものであり、発光体から発光される光の解析がより困難となる発光媒体および当該発光媒体の読み取り方法を提供することを目的とする。 The present invention has been made in consideration of such points, and an object thereof is to provide a light emitting medium and a method for reading the light emitting medium that make it difficult to analyze light emitted from a light emitter.
　本発明は、基材と、この基材上に設けられた発光体とを備え、前記発光体は可視光又は赤外線又は紫外線が照射されたとき、第１波長領域をもつ第１赤外線を発光する第１発光体および第２波長領域をもつ第２赤外線を発光する第２発光体を含み、前記第１発光体の第１赤外線の第１波長領域と、前記第２発光体の第２赤外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１赤外線の第１波長領域は第２発光体の第２赤外線の第２波長領域より狭いことを特徴とする発光媒体である。 The present invention includes a base material and a light emitter provided on the base material, and the light emitter emits a first infrared ray having a first wavelength region when irradiated with visible light, infrared light, or ultraviolet light. A first light emitter and a second light emitter that emits a second infrared light having a second wavelength region; a first wavelength region of the first infrared light of the first light emitter; and a second infrared light of the second light emitter. The light emitting medium is characterized in that the second wavelength region overlaps each other, and the first wavelength region of the first infrared ray of the first light emitter is narrower than the second wavelength region of the second infrared ray of the second light emitter.
　本発明は、前記第１赤外線の第１波長領域のピーク波長は、前記第２赤外線の第２波長領域のピーク波長に一致又は近似することを特徴とする発光媒体である。 The present invention is the light-emitting medium characterized in that the peak wavelength of the first wavelength region of the first infrared coincides with or approximates the peak wavelength of the second wavelength region of the second infrared.
　本発明は、基材と、この基材上に設けられた発光体とを備え、前記発光体は可視光又は紫外線が照射されたとき、第１波長領域をもつ第１紫外線を発光する第１発光体および第２波長領域をもつ第２紫外線を発光する第２発光体を含み、前記第１発光体の第１紫外線の第１波長領域と、前記第２発光体の第２紫外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１紫外線の第１波長領域は第２発光体の第２紫外線の第２波長領域より狭いことを特徴とする発光媒体である。 The present invention includes a substrate and a light emitter provided on the substrate, and the light emitter emits first ultraviolet light having a first wavelength region when irradiated with visible light or ultraviolet light. A second light emitter that emits second ultraviolet light having a light emitter and a second wavelength region; a first wavelength region of the first ultraviolet light of the first light emitter; and a second of the second ultraviolet light of the second light emitter. The light emitting medium is characterized in that the wavelength regions overlap each other, and the first wavelength region of the first ultraviolet ray of the first light emitter is narrower than the second wavelength region of the second ultraviolet ray of the second light emitter.
　本発明は、前記第１紫外線の第１波長領域のピーク波長は、前記第２紫外線の第２波長領域のピーク波長に一致又は近似することを特徴とする発光媒体である。 The present invention is the light-emitting medium characterized in that the peak wavelength of the first wavelength region of the first ultraviolet ray matches or approximates the peak wavelength of the second wavelength region of the second ultraviolet ray.
　本発明は、前記第１発光体は第１の絵柄又は文字を含み、前記第２発光体は第２の絵柄又は文字を含み、前記第１発光体と前記第２発光体は、互いに重なり合うことを特徴とする発光媒体である。 In the present invention, the first light emitter includes a first pattern or character, the second light emitter includes a second pattern or character, and the first light emitter and the second light emitter overlap each other. Is a light emitting medium characterized by the following.
　本発明は、前記第１発光体は第１の絵柄又は文字を含み、前記第２発光体は第２の絵柄又は文字を含み、前記第１発光体と前記第２発光体は、互いに分離していることを特徴とする発光媒体である。 In the present invention, the first light emitter includes a first pattern or character, the second light emitter includes a second pattern or character, and the first light emitter and the second light emitter are separated from each other. It is the luminescent medium characterized by the above-mentioned.
　本発明は、前記第１発光体と前記第２発光体は互いに混在していることを特徴とする発光媒体である。 The present invention is a light emitting medium characterized in that the first light emitter and the second light emitter are mixed with each other.
　本発明は、基材と、この基材上に設けられた発光体とを備え、前記発光体は可視光又は赤外線又は紫外線が照射されたとき、第１波長領域をもつ第１赤外線を発光する第１発光体および第２波長領域をもつ第２赤外線を発光する第２発光体を含み、前記第１発光体の第１赤外線の第１波長領域と、前記第２発光体の第２赤外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１赤外線の第１波長領域は第２発光体の第２赤外線の第２波長領域より狭い発光媒体を準備する工程と、前記発光媒体に可視光又は赤外線又は紫外線を照射部から照射して、前記第１発光体から第１波長領域をもつ第１赤外線を発光させ、前記第２発光体から第２波長領域をもつ第２赤外線を発光させる工程と、前記第１赤外線の第１波長領域と前記第２赤外線の第２波長領域が重なる波長領域を読み取る第１赤外線検知部により前記第１赤外線および前記第２赤外線を読み取る工程と、前記第２赤外線の波長領域のみを読み取る第２赤外線検知部により前記第２赤外線を読み取る工程とを備えたことを特徴とする発光媒体の読み取り方法である。 The present invention includes a base material and a light emitter provided on the base material, and the light emitter emits a first infrared ray having a first wavelength region when irradiated with visible light, infrared light, or ultraviolet light. A first light emitter and a second light emitter that emits a second infrared light having a second wavelength region; a first wavelength region of the first infrared light of the first light emitter; and a second infrared light of the second light emitter. Preparing a light emitting medium in which the second wavelength region overlaps each other and the first wavelength region of the first infrared ray of the first light emitter is narrower than the second wavelength region of the second infrared ray of the second light emitter; Visible light, infrared light, or ultraviolet light is irradiated from an irradiator to emit first infrared light having a first wavelength region from the first light emitter, and second infrared light having a second wavelength region is emitted from the second light emitter. A first wavelength region of the first infrared and the second red A step of reading the first infrared ray and the second infrared ray by a first infrared ray detection unit for reading a wavelength region where the second wavelength region of the line overlaps; and a second infrared ray detection unit for reading only the wavelength region of the second infrared ray. And a step of reading two infrared rays.
　本発明は、基材と、この基材上に設けられた発光体とを備え、前記発光体は可視光又は紫外線が照射されたとき、第１波長領域をもつ第１紫外線を発光する第１発光体および第２波長領域をもつ第２紫外線を発光する第２発光体を含み、前記第１発光体の第１紫外線の第１波長領域と、前記第２発光体の第２紫外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１紫外線の第１波長領域は第２発光体の第２紫外線の第２波長領域より狭い発光媒体を準備する工程と、前記発光媒体に可視光又は紫外線を照射して、前記第１発光体から第１波長領域をもつ第１紫外線を発光させ、前記第２発光体から第２波長領域をもつ第２紫外線を発光させる工程と、前記第１紫外線の第１波長領域と前記第２紫外線の第２波長領域が異なる波長領域を読み取る第１紫外線検知部により前記第１紫外線および前記第２紫外線を読み取る工程と、前記第２紫外線の波長領域のみを読み取る第２紫外線検知部により前記第２紫外線を読み取る工程とを備えたことを特徴とする発光媒体の読み取り方法である。 The present invention includes a substrate and a light emitter provided on the substrate, and the light emitter emits first ultraviolet light having a first wavelength region when irradiated with visible light or ultraviolet light. A second light emitter that emits second ultraviolet light having a light emitter and a second wavelength region; a first wavelength region of the first ultraviolet light of the first light emitter; and a second of the second ultraviolet light of the second light emitter. Preparing a light-emitting medium in which the wavelength regions overlap with each other and the first wavelength region of the first ultraviolet ray of the first light emitter is narrower than the second wavelength region of the second ultraviolet ray of the second light emitter; Or irradiating ultraviolet light to emit first ultraviolet light having a first wavelength region from the first light emitter, and emitting second ultraviolet light having a second wavelength region from the second light emitter; Wavelengths in which the first wavelength region of ultraviolet rays and the second wavelength region of the second ultraviolet rays are different A step of reading the first ultraviolet ray and the second ultraviolet ray by a first ultraviolet ray detection unit for reading a region, and a step of reading the second ultraviolet ray by a second ultraviolet ray detection unit for reading only the wavelength region of the second ultraviolet ray. This is a method for reading a light-emitting medium.
　以上のように本発明によれば、発光体から発光される光の解析が困難となる発光媒体、およびこの発光媒体の読み取り方法を提供することができる。 As described above, according to the present invention, it is possible to provide a light emitting medium that makes it difficult to analyze light emitted from a light emitter, and a method for reading the light emitting medium.
図１は、本発明の発光媒体の一例を示す平面図。FIG. 1 is a plan view showing an example of a light emitting medium of the present invention. 図２は、本発明の第１の実施の形態において、発光媒体の読み取り方法を示す側面図。FIG. 2 is a side view showing a method for reading a light-emitting medium in the first embodiment of the present invention. 図３は、発光媒体の読み取り方法を示す側面図。FIG. 3 is a side view showing a method for reading a light emitting medium. 図４（ａ）（ｂ）は、本発明の第１の実施の形態における発光体の発光スペクトルを示す図。4 (a) and 4 (b) are diagrams showing an emission spectrum of the light emitter in the first embodiment of the present invention. 図５は、本発明の第１の実施の形態における変形例を示す発光媒体を示す側面図。FIG. 5 is a side view showing a light emitting medium showing a modification of the first embodiment of the present invention. 図６は、本発明の変形例における発光媒体を示す平面図。FIG. 6 is a plan view showing a light emitting medium according to a modification of the present invention. 図７（ａ）（ｂ）は、本発明の変形例における発光媒体の読み取り方法を示す平面図。7A and 7B are plan views showing a method for reading a light emitting medium according to a modification of the present invention. 図８は、本発明の第２の実施の形態における発光媒体を示す平面図。FIG. 8 is a plan view showing a light emitting medium according to the second embodiment of the present invention. 図９は、本発明の第２の実施の形態における発光媒体を示す側面図。FIG. 9 is a side view showing a light emitting medium according to the second embodiment of the present invention.
＜第１の実施の形態＞
　以下、図１乃至図４を参照して、本発明の第１の実施の形態について説明する。はじめに本発明の発光媒体からなる偽造防止媒体１０全体について説明する。 <First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, the whole forgery prevention medium 10 made of the light emitting medium of the present invention will be described.
＜偽造防止媒体＞
　図１は、本実施の形態による偽造防止媒体１０、例えば商品券（有価証券）の一例を示す図である。図１に示すように、偽造防止媒体１０は、基材１１と、基材１１上に形成された発光体１２とを備えている。本実施の形態においては、後述するように、発光体１２が、偽造防止媒体１０の真偽を判別するための真偽判別用画像として機能する。この発光体１２は、図１に示すように、可視光又は赤外線又は紫外線が照射されたとき、第１波長領域Ｗ１をもつ第１赤外線ａを発光する第１発光体１２Ａと、第２波長領域Ｗ２をもつ第２赤外線ｂを発光する第２発光体１２Ｂとを含む。 <Forgery prevention medium>
FIG. 1 is a diagram illustrating an example of an anti-counterfeit medium 10 according to the present embodiment, for example, a gift certificate (securities). As shown in FIG. 1, the anti-counterfeit medium 10 includes a base material 11 and a light emitter 12 formed on the base material 11. In the present embodiment, as will be described later, the light emitter 12 functions as an authenticity determination image for determining the authenticity of the forgery prevention medium 10. As shown in FIG. 1, the light emitter 12 includes a first light emitter 12A that emits a first infrared ray a having a first wavelength region W1 when irradiated with visible light, infrared light, or ultraviolet light, and a second wavelength region. And a second light emitter 12B that emits a second infrared ray b having W2.
　この場合、図４に示すように、第１発光体１２Ａから発光する第１赤外線ａの波長領域Ｗ１と、第２発光性体１２Ｂから発光する第２赤外線ｂの波長領域Ｗ２は互いに重なり合う。また第１赤外線ａの波長領域Ｗ１は第２赤外線ｂの波長領域Ｗ２より狭くなっている。さらに、第１赤外線ａの波長領域Ｗ１のピーク波長は、第２赤外線ｂの波長領域Ｗ２のピーク波長に一致又は近似している。 In this case, as shown in FIG. 4, the wavelength region W1 of the first infrared ray a emitted from the first light emitter 12A and the wavelength region W2 of the second infrared ray b emitted from the second light emitter 12B overlap each other. Further, the wavelength region W1 of the first infrared ray a is narrower than the wavelength region W2 of the second infrared ray b. Furthermore, the peak wavelength of the wavelength region W1 of the first infrared ray a coincides with or approximates the peak wavelength of the wavelength region W2 of the second infrared ray b.
　偽造防止媒体１０において用いられる基材１１の材料は特に限られることはなく、偽造防止媒体１０となる有価証券の種類に応じて適宜選択される。例えば、基材１１の材料として、優れた印刷適性および加工適性を有する白色のポリエチレンテレフタレートが用いられる。基材１１の厚みは、偽造防止媒体１０により構成される有価証券の種類に応じて適宜設定される。 The material of the base material 11 used in the anti-counterfeit medium 10 is not particularly limited, and is appropriately selected according to the type of securities used as the anti-counterfeit medium 10. For example, white polyethylene terephthalate having excellent printability and processability is used as the material of the substrate 11. The thickness of the base material 11 is appropriately set according to the type of securities constituted by the forgery prevention medium 10.
　発光体１２の大きさは特に限られることはなく、真偽判別のし易さや、求められる判別精度などに応じて適宜設定される。例えば、発光体１２がしめる領域の高さおよび幅は、それぞれ１～２１０ｍｍおよび１～３００ｍｍの範囲内となっている。 The size of the light emitter 12 is not particularly limited, and is appropriately set according to the ease of authenticity determination, the required determination accuracy, and the like. For example, the height and width of the region to which the light emitter 12 is clamped are in the range of 1 to 210 mm and 1 to 300 mm, respectively.
＜発光体＞
　次に図１乃至図３を参照して、発光体１２についてより詳細に説明する。図１は、発光媒体１０を示す平面図であり、図２および３は発光媒体１０の読み取り方法を示す側面図である。 <Light emitter>
Next, the light emitter 12 will be described in more detail with reference to FIGS. FIG. 1 is a plan view showing the light emitting medium 10, and FIGS. 2 and 3 are side views showing a method for reading the light emitting medium 10.
　基材１１上に設けられた発光体１２は、上述のように可視光又は赤外線又は紫外線が照射されたとき、第１波長領域Ｗ１をもつ第１赤外線ａを発光する第１発光体１２Ａと、第２波長領域Ｗ２をもつ第２赤外線ｂを発光する第２発光体１２Ｂとを含む。 The illuminant 12 provided on the substrate 11 has a first illuminant 12A that emits the first infrared ray a having the first wavelength region W1 when irradiated with visible light, infrared rays, or ultraviolet rays as described above. And a second light emitter 12B that emits the second infrared ray b having the second wavelength region W2.
　このような第１発光体１２Ａは、可視光又は赤外線又は紫外線が照射されたとき第１赤外線ａを発光するが可視光は発光しない無色の第１発光体用インキを含んでいる。またこのような第１発光体用インキ中に、第１発光体１２Ａの位置を容易に確認して赤外線検知領域を特定することができ、かつ第１発光体１２Ａを容易に作製するための製造上の便宜から所望量の顔料を混入させてもよい。この顔料は蛍光発光するため、目視で確認できる。 The first light emitter 12A includes colorless first light emitter ink that emits the first infrared light a but does not emit visible light when irradiated with visible light, infrared light, or ultraviolet light. Further, in such first light emitter ink, the position for the first light emitter 12A can be easily confirmed to identify the infrared detection region, and the first light emitter 12A can be easily manufactured. For the above convenience, a desired amount of pigment may be mixed. Since this pigment emits fluorescence, it can be visually confirmed.
　同様に第２発光体１２Ｂは可視光又は赤外線又は紫外線が照射されたとき第２赤外線ｂを発光するが可視光は発光しない無色の第２発光体用インキを含んでいる。またこのような第２発光体用インキ中に、第２発光体２Ｂの位置を容易に確認して赤外線検知領域を特定することができ、かつ第２発光体１２Ｂを容易に作製するための製造上の便宜から所望量の顔料を混入させてもよい。この顔料は蛍光発光するため、目視で確認できる。 Similarly, the second light emitter 12B contains colorless second light emitter ink that emits the second infrared ray b but does not emit visible light when irradiated with visible light, infrared light, or ultraviolet light. In addition, in such second light emitter ink, it is possible to easily confirm the position of the second light emitter 2B to identify the infrared detection region, and to manufacture the second light emitter 12B easily. For the above convenience, a desired amount of pigment may be mixed. Since this pigment emits fluorescence, it can be visually confirmed.
　このように第１発光体１２Ａを顔料を含む第１発光体用インキにより作製し、第２発光体１２Ｂを顔料を含む第２発光体用インキにより作製することにより、第１発光体１２Ａおよび第２発光体１２Ｂに可視光又は赤外線又は紫外線を照射したとき、第１発光体１２Ａから第１波長領域Ｗ１をもつ第１赤外線ａを発光させることができ、第２発光体１２Ｂから第２波長領域Ｗ２をもつ第２赤外線ｂを発光させることができる。 In this way, the first light emitter 12A is made of the first light emitter ink containing the pigment, and the second light emitter 12B is made of the second light emitter ink containing the pigment, so that the first light emitter 12A and the first light emitter 12A When the two light emitters 12B are irradiated with visible light, infrared rays or ultraviolet rays, the first infrared rays a having the first wavelength region W1 can be emitted from the first light emitters 12A, and the second wavelength regions from the second light emitter 12B. The second infrared ray b having W2 can be emitted.
　この場合、第１赤外線ａの第１波長領域Ｗ１は、第２赤外線ｂの第２波長領域Ｗ２と互いに重なり合うが、第１赤外線ａの第１波長領域Ｗ１は第２赤外線ｂの第２波長領域Ｗ２より狭くなっている。 In this case, the first wavelength region W1 of the first infrared ray a overlaps the second wavelength region W2 of the second infrared ray b, but the first wavelength region W1 of the first infrared ray a is the second wavelength region of the second infrared ray b. Narrower than W2.
　また第１赤外線ａの第１波長領域Ｗ１のピーク波長は、第２赤外線ｂの第２波長領域Ｗ２のピーク波長に一致又は近似している。 Further, the peak wavelength of the first wavelength region W1 of the first infrared ray a coincides with or approximates the peak wavelength of the second wavelength region W2 of the second infrared ray b.
　ここで、第１赤外線ａの第１波長領域Ｗ１は、例えば９００ｎｍを中心として、２０ｎｍ程度の幅をもっている（図４（ａ）参照）。また第２赤外線ｂの第２波長領域Ｗ２は、例えば、９００ｎｍを中心として１００から２００ｎｍ程度の幅をもっている。 Here, the first wavelength region W1 of the first infrared ray a has a width of about 20 nm centered on, for example, 900 nm (see FIG. 4A). The second wavelength region W2 of the second infrared ray b has a width of about 100 to 200 nm with 900 nm as the center, for example.
　また本実施の形態において、「第１波長領域Ｗ１と第２波長領域Ｗ２のピーク波長が一致又は近似する」とは完全に一致する必要はなく、双方のピーク波長間に一定の幅、例えば狭い範囲の第１赤外線ａの第１波長領域Ｗ１の幅（２０ｎｍ）以下の幅をもっていてもよい。 Further, in the present embodiment, “the peak wavelengths of the first wavelength region W1 and the second wavelength region W2 do not need to be completely coincident with each other”, and a certain width, for example, is narrow between the two peak wavelengths. You may have the width | variety below the width | variety (20 nm) of the 1st wavelength range W1 of the 1st infrared rays a of the range.
　ここで第１波長領域Ｗ１と第２波長領域Ｗ２のピーク波長間の幅が第１波長領域Ｗ１の幅より大きくなると、後述する蛍光媒体の読み取り作業を精度良く実行することができない。他方、第１波長領域Ｗ１と第２波長領域Ｗ２のピーク波長間の幅を完全に一致させることは、製造上困難である。 Here, if the width between the peak wavelengths of the first wavelength region W1 and the second wavelength region W2 is larger than the width of the first wavelength region W1, the reading operation of the fluorescent medium described later cannot be performed with high accuracy. On the other hand, it is difficult in manufacturing to make the width between the peak wavelengths of the first wavelength region W1 and the second wavelength region W2 completely coincide.
　このため第１波長領域Ｗ１と第２波長領域Ｗ２のピーク波長間は、上述のような一定の幅をもっている。 Therefore, the peak wavelength between the first wavelength region W1 and the second wavelength region W2 has a certain width as described above.
　上述のような構造をもつ発光体１２の第１発光体１２Ａおよび第２発光体１２Ｂは、基材１１上に互いに分離して形成されている（図１参照）。この場合、第１発光体１２Ａの絵柄と第２発光体１２Ｂの絵柄は分かれており重なってはいないが隙間なくぴったり合わさっていてもよい(毛抜き合わせ構造体)。 The first light emitter 12A and the second light emitter 12B of the light emitter 12 having the structure as described above are formed separately from each other on the substrate 11 (see FIG. 1). In this case, the pattern of the first illuminant 12A and the pattern of the second illuminant 12B are separated and do not overlap, but may be closely aligned with no gaps (tweeping structure).
　このように、第１発光体１２Ａの絵柄と第２発光体１２Ｂの絵柄が分かれており、重なってはいないが隙間なくぴったり合わさっている毛抜き合わせ構造体を製造する場合、端部同士が一部重なることもある。毛抜き合わせ構造体を製造する際、精度よく印刷できれば外観上、綺麗な印刷物を作製することができる。 In this way, when manufacturing a hair-fitting structure in which the pattern of the first light emitter 12A and the pattern of the second light emitter 12B are separated and are not overlapped but are closely aligned with no gap, the ends are partly part of each other. May overlap. When producing a tweezers structure, if it can be printed with high accuracy, a beautiful printed material can be produced in appearance.
　図１において、第１発光体１２Ａは環状に配置された１２個の丸形形状を含み、第２発光体１２Ｂは１２個の第１発行体１２Ａの丸形形状の内部に設けられた４個の丸形形状を含む。このうち第１発光体１２Ａの１２個の丸形形状は第１の絵柄又は文字を構成し、第２発光体１２Ｂの４個の丸形形状は第２の絵柄又は文字を構成している。 In FIG. 1, the first light emitter 12A includes twelve round shapes arranged in an annular shape, and the second light emitter 12B includes four pieces provided inside the round shape of the twelve first issuers 12A. Including a round shape. Of these, the 12 round shapes of the first light emitter 12A constitute a first picture or character, and the four round shapes of the second light emitter 12B constitute a second picture or character.
　次にこのような構成からなる本実施の形態の作用、すなわち発光媒体の読み取り方法について、図２および図３により説明する。 Next, the operation of the present embodiment having such a configuration, that is, the reading method of the luminescent medium will be described with reference to FIGS.
　まず、基材１１と、基材１１上に設けられた第１発光体１２Ａおよび第２発光体１２Ｂを含む発光体１２とを有する発光媒体１０を準備する。 First, a light emitting medium 10 having a base 11 and a light emitter 12 including a first light emitter 12A and a second light emitter 12B provided on the base 11 is prepared.
　次にこの発光媒体１０に対して照射部２０から可視光又は赤外線又は紫外線を照射する。このとき第１発光体１２Ａから第１波長領域Ｗ１をもつ第１赤外線ａが発光する。同時に第２発光体１２Ｂから第２波長領域Ｗ２をもつ第２赤外線ｂが発光する。 Next, the light emitting medium 10 is irradiated with visible light, infrared light, or ultraviolet light from the irradiation unit 20. At this time, the first infrared ray a having the first wavelength region W1 is emitted from the first light emitter 12A. At the same time, the second infrared ray b having the second wavelength region W2 is emitted from the second light emitter 12B.
　次に照射部２０と一体に設けられた赤外線検知部２１により第１発光体１２Ａから発光された第１赤外線ａおよび第２発光体２１Ｂから発光された第２赤外線ｂを検知する。 Next, the first infrared ray a emitted from the first light emitter 12A and the second infrared ray b emitted from the second light emitter 21B are detected by the infrared detector 21 provided integrally with the irradiation unit 20.
　この場合、まず赤外線検知部２１を第１赤外線ａの第１波長領域Ｗ１と、第２赤外線ｂの第２波長領域Ｗ２が重なる波長領域を読み取る第１赤外線検知部モードとする（図２参照）。この場合、赤外線検知部２１の検知波長Ｗ０は中心波長λ１をもち（図４（ａ）参照）、この赤外線検知部２１によって、第１発光体１２Ａから発光する第１赤外線ａおよび第２発光体１２Ｂから発光する第２赤外線ｂの双方を読み取ることができ、赤外線検知部２１により読み取られた画像はモニタ２３に表示される。 In this case, first, the infrared detecting unit 21 is set to a first infrared detecting unit mode that reads a wavelength region where the first wavelength region W1 of the first infrared ray a and the second wavelength region W2 of the second infrared ray b overlap (see FIG. 2). . In this case, the detection wavelength W0 of the infrared detection unit 21 has a center wavelength λ1 (see FIG. 4A), and the infrared detection unit 21 causes the first infrared a and the second light emission emitted from the first light emitter 12A. Both of the second infrared rays b emitted from 12B can be read, and the image read by the infrared detector 21 is displayed on the monitor 23.
　この際モニタ２３には、環状に並んだ１２個の丸形形状からなる第１発光体１２Ａの第１の絵柄又は文字と、第１発光体１２Ａの内部に配置された４個の丸形形状からなる第２発光体１２Ｂの第２の絵柄又は文字が表示される。 At this time, the monitor 23 includes a first pattern or character of the first light emitter 12A having 12 round shapes arranged in a ring and four round shapes arranged inside the first light emitter 12A. A second pattern or character of the second light emitter 12B is displayed.
　次に赤外線検知部２１を第２赤外線ｂの第２波長領域Ｗ２のみを読み取る第２赤外線検知部モードとする（図３参照）。この場合、赤外線検知部２１の検知波長Ｗ０は中心波長λ２をもち（図４（ａ）参照）、この赤外線検知部２１によって、第２発光体１２Ｂから発光する第２赤外線ｂのみを読み取ることができ、赤外線検知部２１により読み取られた画像はモニタ２３に表示される。 Next, the infrared detector 21 is set to a second infrared detector mode that reads only the second wavelength region W2 of the second infrared b (see FIG. 3). In this case, the detection wavelength W0 of the infrared detection unit 21 has a center wavelength λ2 (see FIG. 4A), and the infrared detection unit 21 can read only the second infrared ray b emitted from the second light emitter 12B. The image read by the infrared detector 21 is displayed on the monitor 23.
　ところで、図４（ａ）において、第１発光体１２Ａと第２発光体１２Ｂの発光強度を合わせた場合、すなわち顔料自体の発光強度を同程度に設定して同程度の印刷濃度で印刷するか、または顔料自体の発光強度が異なる場合は印刷時に濃度を調整して発光強度を合わせることによって第１発光体１２Ａと第２発光体１２Ｂの発光強度を合わせた場合、第１発光体１２Ａと第２発光体１２Ｂは画像上の濃度が同じように観察されるため、偽造防止という点でより好ましい。 By the way, in FIG. 4A, when the light emission intensities of the first light emitter 12A and the second light emitter 12B are combined, that is, whether the light emission intensity of the pigment itself is set to the same level and printed with the same print density If the emission intensity of the pigment itself is different, or if the emission intensity of the first luminous body 12A and the second luminous body 12B is matched by adjusting the density and adjusting the luminous intensity during printing, the first luminous body 12A and the first luminous body The two light emitters 12B are more preferable in terms of prevention of forgery because the density on the image is observed in the same manner.
　この際、モニタ２３には、第２発光体１２Ｂの４個の丸形形状からなる第２の絵柄又は文字のみが表示される。 At this time, on the monitor 23, only the second picture or character having the four round shapes of the second light emitter 12B is displayed.
　以上のように本実施の形態によれば、発光媒体１０に対して照射部２０から可視光又は赤外線又は紫外線を照射し、赤外線検知部２１の検知部モードを検知波長Ｗ０が中心波長λ１をもつ第１赤外線検知部モードと、検知波長Ｗ０が中心波長λ２をもつ第２赤外線検知部モード間で切換えるだけで、第１発光体１２Ａおよび第２発光体１２Ｂの双方を読み取る状態から第２発光体１２Ｂのみを読み取る状態へ容易に切換えることができる。そして赤外線検知部２１の検知部モードを上述のように切換えた際、第１発光体１２Ａおよび第２発光体１２Ｂの双方を読み取る状態から第２発光体１２Ｂのみを読み取る状態へ切換わったときのみ、発光媒体１０を真正のものと判断することができる。 As described above, according to the present embodiment, the light emitting medium 10 is irradiated with visible light, infrared light, or ultraviolet light from the irradiation unit 20, and the detection wavelength mode of the infrared detection unit 21 has the detection wavelength W0 having the center wavelength λ1. Only by switching between the first infrared detector mode and the second infrared detector mode in which the detection wavelength W0 has the center wavelength λ2, the second light emitter can be read from the state of reading both the first light emitter 12A and the second light emitter 12B. It is possible to easily switch to a state where only 12B is read. And when the detection unit mode of the infrared detection unit 21 is switched as described above, only when the state of reading both the first light emitter 12A and the second light emitter 12B is switched to the state of reading only the second light emitter 12B. Therefore, it can be determined that the light emitting medium 10 is authentic.
　なお、図４（ａ）において、第１発光体１２Ａから発光される第１赤外線ａの波長領域Ｗ１と、第２発光体１２Ｂから発光される第２赤外線ｂの波長領域Ｗ２は互いに重なり合い、かつ第１発光線ａのピーク波長と第２赤外線ｂのピーク波長は一致又は近似する例を示したが、図４（ｂ）に示すように、第１赤外線ａの波長領域Ｗ１と第２赤外線ｂの波長領域Ｗ２は互いに重なり合っているが、第１赤外線ａのピーク波長と第２赤外線ｂのピーク波長が、例えば５０ｎｍ程度相異していてもよい。図４（ｂ）において、発光媒体１０に対して照射部２０から可視光又は赤外線又は紫外線を照射し、赤外線検知部２１の検知部モードを検知波長Ｗ０が中心波長λ１をもつ第１赤外線検知部モードに切り換えた場合、第１発光体１２Ａおよび第２発光体１２Ｂの双方を読み取ることができ、検知波長Ｗ０が中心波長λ２をもつ第２赤外線検知部モードに切換えた場合、第２発光体１２Ｂのみを読み取ることができる。 In FIG. 4A, the wavelength region W1 of the first infrared ray a emitted from the first light emitter 12A and the wavelength region W2 of the second infrared ray b emitted from the second light emitter 12B overlap each other, and Although the peak wavelength of the 1st light emission line a and the peak wavelength of the 2nd infrared rays b showed the example which approximates or approximates, as shown in FIG.4 (b), the wavelength range W1 of the 1st infrared rays a and the 2nd infrared rays b are shown. Are overlapped with each other, but the peak wavelength of the first infrared ray a and the peak wavelength of the second infrared ray b may differ from each other by, for example, about 50 nm. In FIG. 4B, the light emitting medium 10 is irradiated with visible light, infrared light, or ultraviolet light from the irradiation unit 20, and the detection unit mode of the infrared detection unit 21 is the first infrared detection unit having the detection wavelength W0 having the center wavelength λ1. When the mode is switched, both the first light emitter 12A and the second light emitter 12B can be read, and when the mode is switched to the second infrared detector mode in which the detection wavelength W0 has the center wavelength λ2, the second light emitter 12B. Can only read.
　また、図４（ａ）（ｂ）において、逆に赤外線検知部２１の検知部モードを切換えて、第２発光体１２Ｂのみを読み取る状態から第１発光体１２Ａおよび第２発光体１２Ｂの双方を読み取る状態へ切換わったときに、発光媒体１０を真正のものと判断することができる。 4 (a) and 4 (b), the detection unit mode of the infrared detection unit 21 is switched, and both the first light emitter 12A and the second light emitter 12B are changed from the state where only the second light emitter 12B is read. When the reading state is switched, the light emitting medium 10 can be determined to be authentic.
　更にまた、図４(ａ)において、発光体１２の第１発光体１２Ａから発光される第１赤外線ａの波長領域Ｗ１と、発光体１２の第２発光体１２Ｂから発光される第２赤外線ｂの波長領域Ｗ２は互いに重なり合い、かつ第１赤外線ａのピーク波長と第２赤外線ｂのピーク波長は一致又は近似している。このため、発光体１２から、波長領域が相互に大きく相違する２種類の光が発光される場合に比べると、発光体１２から第１赤外線ａおよび第２赤外線ｂの２種類の光が発光されていることを第３者が解析して見出す事は困難となっている。このため発光媒体１０を偽造することはよりむずかしくなっている。 Furthermore, in FIG. 4A, the wavelength region W1 of the first infrared ray a emitted from the first light emitter 12A of the light emitter 12, and the second infrared ray b emitted from the second light emitter 12B of the light emitter 12. Are overlapped with each other, and the peak wavelength of the first infrared ray a and the peak wavelength of the second infrared ray b are the same or approximate. For this reason, compared with the case where the light emitter 12 emits two types of light whose wavelength regions are significantly different from each other, the light emitter 12 emits two types of light, the first infrared ray a and the second infrared ray b. It is difficult for a third party to analyze and find out. For this reason, it is more difficult to forge the light emitting medium 10.
　次に本実施の形態の変形例について説明する。上記実施の形態において、基材１１上に設けられた発光体１２が、基材１１上で互いに分離している第１発光体１２Ａと第２発光体１２Ｂとを有する例を示したが、これに限らず、基材１１上にまず第１発光体１２Ａを形成し、この第１発光体１２Ａ上に第１発光体１２Ａより小さな形状の第２発光体１２Ｂを形成してもよい（図５参照）。 Next, a modification of this embodiment will be described. In the above embodiment, the example in which the light emitter 12 provided on the substrate 11 has the first light emitter 12A and the second light emitter 12B separated from each other on the substrate 11 has been shown. However, the first light emitter 12A may be first formed on the substrate 11, and the second light emitter 12B having a smaller shape than the first light emitter 12A may be formed on the first light emitter 12A (FIG. 5). reference).
　図５において、赤外線検知部２１を第１赤外線検知部モードとした場合、第２発光体１２Ｂの第２の絵柄又は文字と、この第２発光体１２Ｂの第２絵柄又は文字の周囲に位置する第１発光体１２Ａの第１絵柄又は文字が表示される。また赤外線検知部２１を第２赤外線検知部モードとした場合、第２発光体１２Ｂの第２の絵柄又は文字のみが表示される。 In FIG. 5, when the infrared detection unit 21 is in the first infrared detection unit mode, the second pattern or character of the second light emitter 12B and the second pattern or character of the second light emitter 12B are located around the second pattern or character. The first pattern or character of the first light emitter 12A is displayed. When the infrared detector 21 is in the second infrared detector mode, only the second picture or character of the second light emitter 12B is displayed.
　さらにまた基材１１上の発光体１２が環状に配置された１２個の丸形形状をもつ第１発光体１２Ａと、１２個の丸形形状内部に配置された４個の丸形形状をもつ第２発光体１２Ｂとを有する例を示したが、これに限らず発光体１２は第１の絵柄又は文字、例えば「Ａ」「Ｃ」を有する第１発光体１２Ａと、第２の絵柄又は文字、例えば「Ａ」「Ｃ」間に配置された「Ｂ」を有する第２発光体１２Ｂとを有してもよい（図６および図７（ａ）（ｂ）参照）。 Furthermore, the first light emitter 12A having 12 round shapes in which the light emitters 12 on the substrate 11 are arranged in a ring shape, and four round shapes arranged in the 12 round shapes. Although the example having the second light emitter 12B is shown, the light emitter 12 is not limited to this, and the light emitter 12 has the first light emitter 12A having the first picture or character, for example, “A” and “C”, and the second picture or character. You may have 2nd light-emitting body 12B which has a character, for example, "B" arrange | positioned between "A" and "C" (refer FIG.6 and FIG.7 (a) (b)).
　この場合、赤外線検知部２１を第１赤外線表示部モードとした場合、第１発光体１２Ａの第１の絵柄又は文字、「Ａ」「Ｃ」と、第２発光体１２Ｂの第２の絵柄又は文字、「Ｂ」の双方がモニタ２３に表示される（図７（ａ）参照）。一方、赤外線検知部２１を第２赤外線表示部モードとした場合、第２発光体１２Ｂの第２絵柄又は文字、「Ｂ」のみがモニタ２３に表示される（図７（ｂ）参照）。この場合、絵柄としては、微細なマイクロ文字であっても良い。 In this case, when the infrared detection unit 21 is set to the first infrared display unit mode, the first pattern or characters of the first light emitter 12A, “A” and “C”, and the second pattern of the second light emitter 12B or Both the character and “B” are displayed on the monitor 23 (see FIG. 7A). On the other hand, when the infrared detection unit 21 is set to the second infrared display unit mode, only the second pattern or character “B” of the second light emitter 12B is displayed on the monitor 23 (see FIG. 7B). In this case, the pattern may be fine micro characters.
＜第２の実施の形態＞
　次に図８および図９により、本発明の第２の実施の形態について説明する。　
　図８および図９に示す第２の実施の形態は、基材１１上の発光体１２が、第１発光体１２Ａと第２発光体１２Ｂを有するとともに、第１発光体１２Ａと第２発光体１２Ｂが互いに混在している点が異なるが、他の構成は図１乃至図４に示す第１の実施の形態と略同一である。 <Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment shown in FIGS. 8 and 9, the light emitter 12 on the substrate 11 includes the first light emitter 12A and the second light emitter 12B, and the first light emitter 12A and the second light emitter. Although 12B is different from each other, other configurations are substantially the same as those of the first embodiment shown in FIGS.
　図８および図９において、発光体１２に可視光又は赤外線又は紫外線を照射したとき、第１発光体１２Ａから第１波長領域Ｗ１をもつ第１赤外線ａが発光され、第２発光体Ｂから第２波長領域Ｗ２をもつ第２赤外線ｂが発光される。 8 and 9, when the light emitter 12 is irradiated with visible light, infrared light, or ultraviolet light, the first light emitter 12A emits the first infrared light a having the first wavelength region W1, and the second light emitter B emits the first light. The second infrared ray b having the two wavelength region W2 is emitted.
　このような構成からなる発光体１２は、第１発光体用インキと第２発光体用インキを含むとともに、更に発光体１２の位置を確認することができ、かつ製造上の便宜から混入された顔料を含み、これら第１発光体用インキと、第２発光体用インキと、顔料は発光体１２中に混在している。この顔料は蛍光発光するため、目視で確認できる。 The light emitter 12 having such a configuration includes the first light emitter ink and the second light emitter ink, and can further confirm the position of the light emitter 12 and is mixed for convenience in manufacturing. The first light emitter ink, the second light emitter ink, and the pigment are mixed in the light emitter 12 including the pigment. Since this pigment emits fluorescence, it can be visually confirmed.
　このような構成からなる発光媒体１０において、検知波長Ｗ０が中心波長λ１をもつ第１赤外線検知部モードにより、発光体１２の第１発光体１２Ａから発光された第１赤外線ａと第２発光体１２Ｂから発光された第２赤外線ｂの双方を検知することができる（図４（ａ）参照）。 In the light emitting medium 10 having such a configuration, the first infrared ray a and the second light emitter emitted from the first light emitter 12A of the light emitter 12 in the first infrared detector mode in which the detection wavelength W0 has the center wavelength λ1. Both of the second infrared rays b emitted from 12B can be detected (see FIG. 4A).
　また検知波長Ｗ０が中心波長λ２をもつ第２赤外線検知部モードにより、発光体１２の第２発光体１２Ｂから発光された第２赤外線ｂのみを検知することができる。 Further, only the second infrared ray b emitted from the second light emitter 12B of the light emitter 12 can be detected by the second infrared detector mode in which the detection wavelength W0 has the center wavelength λ2.
　例えば、検知波長Ｗ０が中心波長λ１をもつ第１赤外線検知部モードと、検知波長Ｗ０が中心波長λ２をもつ第２赤外線検知部モードの双方を用いて発光媒体１０の読み取りを行うことにより、発光体１２が互いに混在された第１発光体１２Ａと第２発光体１２Ｂを含むことを容易に確認することができる。 For example, the light emission medium 10 is read by using both the first infrared detection unit mode in which the detection wavelength W0 has the center wavelength λ1 and the second infrared detection unit mode in which the detection wavelength W0 has the center wavelength λ2. It can be easily confirmed that the body 12 includes the first light emitter 12A and the second light emitter 12B mixed together.
＜他の実施の形態＞
　上記各実施の形態において、発光媒体１０の発光体１２に対して可視光又は赤外線又は紫外線を照射することにより、発光体１２の第１発光体１２Ａから第１波長領域Ｗ１をもつ第１赤外線ａを発光させ、第２発光体１２Ｂから第２波長領域Ｗ２をもつ第２赤外線ｂを発光させる例を示したが、これに限らず発光体１２は発光体１２に対して可視光又は紫外線を照射することにより、第１波長領域を有する第１紫外線を発光する第１発光体１２Ａと、第２波長領域を有する第２紫外線を発光する第２発光体１２Ｂとを有していてもよい。この場合、第１発光体１２Ａからの第１波長領域と、第２発光体１２Ｂからの第２紫外線の第２波長領域は互いに重なり合う。また第１紫外線の第１波長領域は、第２紫外線の第２波長領域より狭くなっており、かつ第１紫外線の第１波長領域のピーク波長は、第２紫外線の第２波長領域のピーク波長に一致又は近似している。 <Other embodiments>
In each of the above embodiments, the first infrared ray a having the first wavelength region W1 from the first light emitter 12A of the light emitter 12 by irradiating the light emitter 12 of the light emitting medium 10 with visible light, infrared light, or ultraviolet light. In this example, the second light emitter 12B emits the second infrared ray b having the second wavelength region W2, but the light emitter 12 emits visible light or ultraviolet light to the light emitter 12. Thus, the first light emitter 12A that emits the first ultraviolet light having the first wavelength region and the second light emitter 12B that emits the second ultraviolet light having the second wavelength region may be included. In this case, the first wavelength region from the first light emitter 12A and the second wavelength region of the second ultraviolet light from the second light emitter 12B overlap each other. The first wavelength region of the first ultraviolet ray is narrower than the second wavelength region of the second ultraviolet ray, and the peak wavelength of the first wavelength region of the first ultraviolet ray is the peak wavelength of the second wavelength region of the second ultraviolet ray. Match or approximate.
　１０　　偽造防止媒体
　１１　　基材
　１２　　発光体
　１２Ａ　第１発光体
　１２Ｂ　第２発光体
　２０　　照射部
　２１　　赤外線検知部
　２３　　モニタ
　ａ　　　第１赤外線
　ｂ　　　第２赤外線
　λ１　　検知波長
　λ２　　検知波長 DESCRIPTION OF SYMBOLS 10 Forgery prevention medium 11 Base material 12 Light emitter 12A 1st light emitter 12B 2nd light emitter 20 Irradiation part 21 Infrared detection part 23 Monitor a 1st infrared ray b 2nd infrared ray (lambda) 1 detection wavelength (lambda) 2 detection wavelength

Claims (9)

  1. 　基材と、
    　この基材上に設けられた発光体とを備え、
    　前記発光体は可視光又は赤外線又は紫外線が照射されたとき、第１波長領域をもつ第１赤外線を発光する第１発光体および第２波長領域をもつ第２赤外線を発光する第２発光体を含み、
    　前記第１発光体の第１赤外線の第１波長領域と、前記第２発光体の第２赤外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１赤外線の第１波長領域は第２発光体の第２赤外線の第２波長領域より狭いことを特徴とする発光媒体。     A substrate;
    A light emitter provided on the substrate;
    The illuminant includes a first illuminant that emits a first infrared ray having a first wavelength region and a second illuminant that emits a second infrared ray having a second wavelength region when irradiated with visible light, infrared rays, or ultraviolet rays. Including
    The first wavelength region of the first infrared ray of the first light emitter and the second wavelength region of the second infrared ray of the second light emitter overlap each other, and the first wavelength region of the first infrared ray of the first light emitter is the first wavelength region. A light emitting medium characterized by being narrower than the second wavelength region of the second infrared ray of the two light emitters.
  2. 　前記第１赤外線の第１波長領域のピーク波長は、前記第２赤外線の第２波長領域のピーク波長に一致又は近似することを特徴とする請求項１記載の発光媒体。 2. The light emitting medium according to claim 1, wherein the peak wavelength of the first infrared region in the first wavelength region coincides with or approximates the peak wavelength of the second infrared region in the second wavelength region.
  3. 　基材と、
    　この基材上に設けられた発光体とを備え、
    　前記発光体は可視光又は紫外線が照射されたとき、第１波長領域をもつ第１紫外線を発光する第１発光体および第２波長領域をもつ第２紫外線を発光する第２発光体を含み、
    　前記第１発光体の第１紫外線の第１波長領域と、前記第２発光体の第２紫外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１紫外線の第１波長領域は第２発光体の第２紫外線の第２波長領域より狭いことを特徴とする発光媒体。     A substrate;
    A light emitter provided on the substrate;
    The light emitter includes a first light emitter that emits first ultraviolet light having a first wavelength region and a second light emitter that emits second ultraviolet light having a second wavelength region when irradiated with visible light or ultraviolet light,
    The first wavelength region of the first ultraviolet ray of the first light emitter and the second wavelength region of the second ultraviolet ray of the second light emitter overlap each other, and the first wavelength region of the first ultraviolet ray of the first light emitter is the first wavelength region. A light emitting medium characterized by being narrower than the second wavelength region of the second ultraviolet light of the two light emitters.
  4. 　前記第１紫外線の第１波長領域のピーク波長は、前記第２紫外線の第２波長領域のピーク波長に一致又は近似することを特徴とする請求項３記載の発光媒体。 4. The light emitting medium according to claim 3, wherein a peak wavelength of the first wavelength region of the first ultraviolet ray coincides with or approximates a peak wavelength of the second wavelength region of the second ultraviolet ray.
  5. 　前記第１発光体は第１の絵柄又は文字を含み、
    　前記第２発光体は第２の絵柄又は文字を含み、
    　前記第１発光体と前記第２発光体は、互いに重なり合うことを特徴とする請求項１乃至４のいずれか記載の発光媒体。     The first light emitter includes a first pattern or character;
    The second light emitter includes a second pattern or character;
    The light emitting medium according to claim 1, wherein the first light emitter and the second light emitter overlap each other.
  6. 　前記第１発光体は第１の絵柄又は文字を含み、
    　前記第２発光体は第２の絵柄又は文字を含み、
    　前記第１発光体と前記第２発光体は、互いに分離していることを特徴とする請求項１乃至４のいずれか記載の発光媒体。     The first light emitter includes a first pattern or character;
    The second light emitter includes a second pattern or character;
    The light emitting medium according to claim 1, wherein the first light emitter and the second light emitter are separated from each other.
  7. 　前記第１発光体と前記第２発光体は互いに混在していることを特徴とする請求項１乃至４のいずれか記載の発光媒体。 The light emitting medium according to any one of claims 1 to 4, wherein the first light emitter and the second light emitter are mixed with each other.
  8. 　基材と、この基材上に設けられた発光体とを備え、前記発光体は可視光又は赤外線又は紫外線が照射されたとき、第１波長領域をもつ第１赤外線を発光する第１発光体および第２波長領域をもつ第２赤外線を発光する第２発光体を含み、前記第１発光体の第１赤外線の第１波長領域と、前記第２発光体の第２赤外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１赤外線の第１波長領域は第２発光体の第２赤外線の第２波長領域より狭い発光媒体を準備する工程と、
    　前記発光媒体に可視光又は赤外線又は紫外線を照射部から照射して、前記第１発光体から第１波長領域をもつ第１赤外線を発光させ、前記第２発光体から第２波長領域をもつ第２赤外線を発光させる工程と、
    　前記第１赤外線の第１波長領域と前記第２赤外線の第２波長領域が重なる波長領域を読み取る第１赤外線検知部により前記第１赤外線および前記第２赤外線を読み取る工程と、　前記第２赤外線の波長領域のみを読み取る第２赤外線検知部により前記第２赤外線を読み取る工程とを備えたことを特徴とする発光媒体の読み取り方法。     A first light emitter that includes a base material and a light emitter provided on the base material and emits a first infrared light having a first wavelength region when the light emitter is irradiated with visible light, infrared light, or ultraviolet light. And a second light emitter that emits a second infrared light having a second wavelength region, a first wavelength region of the first infrared light of the first light emitter, and a second wavelength region of the second infrared light of the second light emitter. Providing a light emitting medium that overlaps each other and wherein the first wavelength region of the first infrared ray of the first light emitter is narrower than the second wavelength region of the second infrared ray of the second light emitter;
    The light emitting medium is irradiated with visible light, infrared light, or ultraviolet light from an irradiating unit to emit first infrared light having a first wavelength region from the first light emitter, and second light having a second wavelength region from the second light emitter. A step of emitting two infrared rays;
    A step of reading the first infrared ray and the second infrared ray by a first infrared detector that reads a wavelength region in which the first wavelength region of the first infrared ray and the second wavelength region of the second infrared ray overlap; and And a step of reading the second infrared ray by a second infrared detector for reading only the wavelength region.
  9. 　基材と、この基材上に設けられた発光体とを備え、前記発光体は可視光又は紫外線が照射されたとき、第１波長領域をもつ第１紫外線を発光する第１発光体および第２波長領域をもつ第２紫外線を発光する第２発光体を含み、前記第１発光体の第１紫外線の第１波長領域と、前記第２発光体の第２紫外線の第２波長領域は互いに重なり合い、かつ第１発光体の第１紫外線の第１波長領域は第２発光体の第２紫外線の第２波長領域より狭い発光媒体を準備する工程と、
    　前記発光媒体に可視光又は紫外線を照射して、前記第１発光体から第１波長領域をもつ第１紫外線を発光させ、前記第２発光体から第２波長領域をもつ第２紫外線を発光させる工程と、
    　前記第１紫外線の第１波長領域と前記第２紫外線の第２波長領域が異なる波長領域を読み取る第１紫外線検知部により前記第１紫外線および前記第２紫外線を読み取る工程と、　前記第２紫外線の波長領域のみを読み取る第２紫外線検知部により前記第２紫外線を読み取る工程とを備えたことを特徴とする発光媒体の読み取り方法。     A first light emitter that emits a first ultraviolet ray having a first wavelength region when irradiated with visible light or ultraviolet light, and a first light emitter and a light emitter provided on the substrate; A second light emitter that emits second ultraviolet light having two wavelength regions, wherein the first wavelength region of the first ultraviolet light of the first light emitter and the second wavelength region of the second ultraviolet light of the second light emitter are mutually Providing a light emitting medium that overlaps and the first wavelength region of the first ultraviolet light of the first light emitter is narrower than the second wavelength region of the second ultraviolet light of the second light emitter;
    Irradiating the light emitting medium with visible light or ultraviolet light causes the first light emitter to emit first ultraviolet light having a first wavelength region, and causes the second light emitter to emit second ultraviolet light having a second wavelength region. Process,
    A step of reading the first ultraviolet ray and the second ultraviolet ray by a first ultraviolet ray detector that reads a wavelength region in which the first wavelength region of the first ultraviolet ray and the second wavelength region of the second ultraviolet ray are different from each other; And a step of reading the second ultraviolet ray by a second ultraviolet ray detector that reads only the wavelength region.
PCT/JP2015/082201 2014-11-20 2015-11-17 Light-emitting medium and method for reading light-emitting medium WO2016080374A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016560228A JP6781953B2 (en) 2014-11-20 2015-11-17 Light emitting medium and reading method of light emitting medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014235563 2014-11-20
JP2014-235563 2014-11-20

Publications (1)

Publication Number Publication Date
WO2016080374A1 true WO2016080374A1 (en) 2016-05-26

Family

ID=56013910

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/082201 WO2016080374A1 (en) 2014-11-20 2015-11-17 Light-emitting medium and method for reading light-emitting medium

Country Status (2)

Country Link
JP (1) JP6781953B2 (en)
WO (1) WO2016080374A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009078431A (en) * 2007-09-26 2009-04-16 Toppan Printing Co Ltd Forgery prevention medium and verification method in use thereof
JP2010072933A (en) * 2008-09-18 2010-04-02 Toshiba Corp Fluorescence detection apparatus
JP2012037328A (en) * 2010-08-05 2012-02-23 Dainippon Printing Co Ltd Ultraviolet irradiation apparatus and inspection system
JP2012035549A (en) * 2010-08-09 2012-02-23 Dainippon Printing Co Ltd Light-emitting medium
JP2013199063A (en) * 2012-03-26 2013-10-03 Dainippon Printing Co Ltd Information recording medium and reading method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3828632B2 (en) * 1997-03-11 2006-10-04 大日本印刷株式会社 Fluorescent image formation
JP4930865B2 (en) * 2009-05-15 2012-05-16 独立行政法人 国立印刷局 Authenticity discrimination method of anti-counterfeit paper
JP5888697B2 (en) * 2012-07-12 2016-03-22 独立行政法人 国立印刷局 Luminescent printed matter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009078431A (en) * 2007-09-26 2009-04-16 Toppan Printing Co Ltd Forgery prevention medium and verification method in use thereof
JP2010072933A (en) * 2008-09-18 2010-04-02 Toshiba Corp Fluorescence detection apparatus
JP2012037328A (en) * 2010-08-05 2012-02-23 Dainippon Printing Co Ltd Ultraviolet irradiation apparatus and inspection system
JP2012035549A (en) * 2010-08-09 2012-02-23 Dainippon Printing Co Ltd Light-emitting medium
JP2013199063A (en) * 2012-03-26 2013-10-03 Dainippon Printing Co Ltd Information recording medium and reading method

Also Published As

Publication number Publication date
JP6781953B2 (en) 2020-11-11
JPWO2016080374A1 (en) 2017-08-31

Similar Documents

Publication Publication Date Title
JP5541583B2 (en) Luminescent medium and method for confirming luminous medium
JP6819295B2 (en) Light emitting medium and reading method of light emitting medium
US9028929B2 (en) Light-emitting medium
US9452631B2 (en) Light-emitting medium
ES2622368T3 (en) Security element for a security and / or security document
JP4418881B2 (en) Anti-counterfeit printed matter
JP2006192706A (en) Authenticity distinguishable luminuous printed matter
KR102637134B1 (en) Complaint document containing security elements and security elements containing concealed information
WO2012018085A1 (en) Light-emitting medium and method for confirming light-emitting medium
WO2016080374A1 (en) Light-emitting medium and method for reading light-emitting medium
JP5573469B2 (en) Luminescent medium and method for confirming luminous medium
JP6124254B2 (en) Luminescent printed matter
JP6600874B2 (en) Anti-counterfeit printed matter
JP2012037328A (en) Ultraviolet irradiation apparatus and inspection system
JP2014030921A (en) Identification medium and identification device
JP5888697B2 (en) Luminescent printed matter
JP6919527B2 (en) Identification medium
JP2011218740A (en) Light-emitting printed matter
JP6642449B2 (en) Luminescent medium and inspection method thereof
JP6146654B2 (en) Medium on which image is formed and method for checking medium
JP2018043496A (en) Information recording medium and authenticity determination method
JP2010237246A (en) Information reading device and information reading method
JP2014156024A (en) Medium with image formed thereon and method of checking medium

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15861017

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016560228

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15861017

Country of ref document: EP

Kind code of ref document: A1