WO2021020870A1 - Dispositif pour la empêcher la contrefaçon - Google Patents

Dispositif pour la empêcher la contrefaçon Download PDF

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Publication number
WO2021020870A1
WO2021020870A1 PCT/KR2020/009966 KR2020009966W WO2021020870A1 WO 2021020870 A1 WO2021020870 A1 WO 2021020870A1 KR 2020009966 W KR2020009966 W KR 2020009966W WO 2021020870 A1 WO2021020870 A1 WO 2021020870A1
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WO
WIPO (PCT)
Prior art keywords
image
layer
authenticity determination
diffractive optical
counterfeiting
Prior art date
Application number
PCT/KR2020/009966
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English (en)
Korean (ko)
Inventor
최진영
김석규
Original Assignee
주식회사 나노메카
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.)
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Publication date
Application filed by 주식회사 나노메카 filed Critical 주식회사 나노메카
Publication of WO2021020870A1 publication Critical patent/WO2021020870A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements

Definitions

  • the present invention relates to an anti-counterfeiting device.
  • the present invention relates to an anti-counterfeiting device capable of implementing an image for determining authenticity using a pattern for determining authenticity.
  • a hologram is a representative thing given to a product to prevent counterfeiting.
  • a hologram is designed using an interference shape between the reference light and the object light reflected from the object as the reference light and the object light irradiated to the object using a beam splitter.
  • the hologram is a medium in which interference fringes that reproduce a three-dimensional image are recorded and is made using the principle of holography. Accordingly, the hologram can implement a specific image by irradiating the reproduced light having the same frequency, wavelength, and phase as the reference light to the interference fringe at a specific angle. Also, the color or shape of the reflected light may change depending on the viewing angle.
  • the hologram pattern forming the hologram is regular as it has a certain shape.
  • the nano-imprinting method is a method of forming a diffraction pattern on an anti-counterfeiting film by using a mold having a nano pattern, and has been widely used in recent years because it can record a lot of information at low cost.
  • the anti-counterfeiting film is irradiated in a straight direction so that the laser light transmitted through the inside is diffracted in a certain direction. Accordingly, after the laser light irradiated in a straight direction toward the anti-counterfeiting film passes through the anti-counterfeiting film, an image for anti-counterfeiting is realized by light diffracted by the diffraction pattern.
  • an object of the present invention is to provide an anti-counterfeiting device capable of implementing a plurality of different authenticity determination images using different application conditions.
  • the anti-counterfeiting device is provided on a base and on the base, and has a diffraction pattern to implement a first authenticity determination image using light in the visible region.
  • a first image element including a diffractive optical element layer provided so that it is disposed under the diffractive optical element layer, and can implement a second authenticity determination image according to external light or application conditions excluding the visible light.
  • a bonding layer interposed between the first image element and the second image element, and bonding the first and second image elements to each other.
  • the bonding layer may be interposed between the base and the second image element.
  • the bonding layer may be interposed between the diffractive optical element layer and the second image element.
  • the first image element is provided along the profile of the diffraction pattern on the diffractive optical element layer, and a refractive index controlling thin film made of a material having a refractive index difference of at least 0.1 or more from a material constituting the diffractive optical element layer It may contain more.
  • the refractive index control thin film may include at least one of light reflective metallic materials made of gold, silver, and aluminum.
  • the second image element is a functional pattern that is interposed between a substrate and the substrate and the bonding layer, and can implement the second authenticity determination image according to the external light or application conditions It may include.
  • the functional pattern may include a functional material capable of implementing the image for determining the second authenticity by converting optical properties according to any one of ultraviolet rays, heat, magnetism, humidity, and pressure.
  • a first image device including a diffractive optical device layer using visible light and a second image device using light or application conditions other than the visible light are provided. Accordingly, the anti-counterfeiting device can implement a plurality of authenticity determination images including a first authenticity determination image and a second authenticity determination image in response to different application conditions.
  • FIG. 1 is a cross-sectional view illustrating an anti-counterfeiting device according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view illustrating an anti-counterfeiting device according to another embodiment of the present invention.
  • FIG 3 is a cross-sectional view illustrating a phase difference of reflected light reflected from a first image element included in an anti-counterfeiting element.
  • first and second may be used to describe various components, but the components should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.
  • FIG. 1 is a cross-sectional view illustrating an anti-counterfeiting device according to an embodiment of the present invention.
  • an anti-counterfeiting device includes a first image device 110, a second image device 120, and a bonding layer 130.
  • the anti-counterfeiting device may implement a first authenticity determination image and a second authenticity determination image different from each other according to application conditions such as light, magnetism, or pressure applied from the outside.
  • the first image element 110 may implement the first authenticity determination image using visible light.
  • the first image element 110 includes a base 111 and a diffractive optical element layer 115.
  • the base 111 may be made of a polymer material.
  • the base 111 may be made of a PET material.
  • a diffractive optical element layer 115 is provided on the upper surface of the base 111.
  • a diffraction pattern is formed on the upper surface of the diffractive optical element layer 115.
  • the diffraction pattern may have various sizes and shapes.
  • the shape of the diffraction pattern may include a stripe shape, a mosaic shape, a pyramid shape, and the like.
  • the diffraction pattern may be defined as a pattern for using diffraction characteristics for implementing a specific image through a design algorithm including Fourier transform and Fourier inverse transform processes.
  • the diffraction pattern may be formed through a hot embossing process, a nanoimprinting process, or a transfer printing process.
  • the second image element 120 is disposed under the first image element 110.
  • the second image element 120 is disposed under the diffractive optical element layer 115.
  • the second image element 120 is provided to implement a second authenticity determination image using external light or an application condition other than the visible light.
  • Examples of the external light may include ultraviolet rays. That is, the ultraviolet rays pass through the first image element 110 and reach the second image element 120. In this case, the second image element 120 may implement a second authenticity determination image.
  • the application condition may include heat, magnetism, humidity, or pressure.
  • the second image element 120 may display a second authenticity determination image according to the application condition.
  • the second image element 120 includes a substrate 121 and a functional pattern 125 interposed between the substrate 121 and the bonding layer 130 and capable of implementing the second authenticity determination image. .
  • the functional pattern 125 may have a property of discoloration according to temperature.
  • Examples of the heat-reactive material may include a mixture of a Zion pigment and a synthetic resin.
  • Zion pigments included in the thermally reactive material may have a plurality of types. Accordingly, the functional pattern 125 may implement various color changes according to temperature.
  • the functional pattern 125 may include magnetic particles and a solvent.
  • the magnetic particles are aligned in a direction parallel to the direction of the first magnetic field to form a particle chain.
  • the particle chain moves in a direction close to the bonding layer 130.
  • the intensity or direction of the second magnetic field is changed, or when a third magnetic field opposite to the direction of the second magnetic field is applied, the particle chains move away to the bonding layer 130, and thus the contrast and darkness of the second authenticity determination image Color can be adjusted.
  • the functional pattern 125 may implement a second authenticity determination image in response to humidity.
  • the functional pattern 125 may include cobalt chloride.
  • the functional pattern 125 may include a pigment and a humidity indicator solution.
  • the pigment may be, for example, a blue pigment manufactured by VIDHI (manufactured by Dyestuff Mfg.).
  • the functional pattern 125 is colored green in a dry state and purple in a humid state, so that a change in humidity may be detected.
  • the functional pattern 125 may include a liquid medium and a pigment distributed in the medium and having a different orientation according to the applied pressure.
  • the liquid medium is sufficiently viscous so that the pigment, which can be aligned by pressure, is not re-oriented when externally applied pressure is released.
  • a pressure is applied to the surface of the second image element 120 in a positive direction or a tangential direction (shearing)
  • the liquid medium and the pigment are disturbed and the appearance of the element may be changed.
  • the pigment may change from an equilibrium state to a disordered state by the applied pressure.
  • the pigment upon removal of the pressure, the pigment returns to the aligned state.
  • the bonding layer 130 is interposed between the first image element 110 and the second image element 120.
  • the bonding layer 130 bonds the first image element 110 and the second image element 120 to each other.
  • the bonding layer 130 may be interposed between the base 111 and the substrate 1121 included in the second image element 120.
  • the bonding layer 130 may be formed through a laminating process.
  • the bonding layer 130 may be cooled, for example, to bond the first image element 110 and the second image element 120 to each other.
  • the anti-counterfeiting device includes first and second image devices 110 and 120 capable of separately implementing first and second authenticity determination images, respectively, using visible light and an application condition different from the visible light. ).
  • the authenticity determination element can implement a plurality of images.
  • FIG. 2 is a cross-sectional view illustrating an anti-counterfeiting device according to an embodiment of the present invention.
  • the anti-counterfeiting device includes a first image device 110, a second image device 120, and a bonding layer 130.
  • the anti-counterfeiting device 100 may implement a first authenticity determination image and a second authenticity determination image different from each other according to an application condition such as light, magnetism, or pressure applied from the outside.
  • the first image element 110 may implement the first authenticity determination image using visible light.
  • the first image element 110 includes a base 111, a diffractive optical element layer 115, and a refractive index adjusting thin film 117.
  • the base 111 may be made of a polymer material.
  • the base 111 may be made of a PET material.
  • a diffractive optical element layer 115 is provided on the lower surface of the base 111.
  • a diffraction pattern is formed on the lower surface of the diffractive optical element layer 115.
  • the diffraction pattern may have various sizes and shapes.
  • the shape of the diffraction pattern may include a stripe shape, a mosaic shape, a pyramid shape, and the like.
  • the diffraction pattern may be defined as a pattern for using diffraction characteristics for implementing a specific image through a design algorithm including Fourier transform and Fourier inverse transform processes.
  • the diffraction pattern may be formed through a hot embossing process, a nanoimprinting process, or a transfer printing process.
  • the refraction control thin film 117 is formed along the profile of the diffraction pattern. Accordingly, the refractive index adjusting thin film 117 may be formed to have a uniform thickness.
  • the refractive index control thin film 117 may be made of a material having a refractive index difference of at least 0.1 or more from a material constituting the diffractive optical element layer 115.
  • the difference in refractive index between the diffractive optical element layer 115 and the bonding layer 130 may be less than 0.1.
  • the diffractive optical element layer 115 has difficulty in implementing a first authenticity determination image using the visible light.
  • the refractive index adjusting thin film 117 is interposed between the diffractive optical element layer 115 and the bonding layer 130, the refractive index adjusting thin film 117 and the diffractive optical element layer 115 The difference in refractive index between may be adjusted to 0.1 or more. Accordingly, the first image element 110 including the diffractive optical element layer 115 can easily implement the first authenticity determination image using visible light.
  • the diffractive optical element layer 115 determines the first authenticity with visible light. Dragon images can be implemented.
  • the refractive index control thin film 117 may include a light reflective metal material such as gold, silver, and aluminum.
  • the thickness of the refractive index adjusting thin film 117 may be adjusted according to the required light transmittance.
  • the refractive index control thin film 117 may have a thickness of 1 nm to 4 nm.
  • the phase of the reflected light reflected from the surface of the refractive index adjusting thin film 117 is changed due to the step difference formed in the diffraction pattern of the refractive index adjusting thin film 117. Accordingly, a specific diffraction image may be implemented by the reflected lights being mutually interfered.
  • the second image element 120 is disposed under the first image element 110. That is, the second image element 120 is disposed under the diffractive optical element layer 115.
  • the second image element 120 is provided to implement a second authenticity determination image using external light or an application condition other than the visible light.
  • FIG 3 is a cross-sectional view illustrating a phase difference of reflected light reflected from a first image element included in an anti-counterfeiting element.
  • k 0 ( 2 ⁇ / ⁇ )
  • p is a difference value greater than 1, which is the refractive index of air
  • h' is the difference in height of the diffraction pattern.
  • an image for authenticity determination can be implemented from a diffraction pattern.
  • the present invention can be applied as a technology to prevent forgery or alteration of expensive items such as software, CD, DVD, securities, liquor, and medicine.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un dispositif pour empêcher la contrefaçon comprenant : une base ; un premier dispositif d'image qui est disposé sur la base et comprend une couche de dispositif optique de type diffraction prévue pour réaliser une première image de détermination d'authenticité en ayant un motif de diffraction et à l'aide de lumière dans le spectre de lumière visible ; un second dispositif d'image qui est agencé au-dessous de la couche de dispositif optique de type diffraction et prévu pour réaliser une seconde image de détermination d'authenticité selon un état d'application ou une lumière externe à l'exception de la lumière visible ; et une couche de liaison qui est interposée entre le premier dispositif d'image et le second dispositif d'image et lie le premier dispositif d'image et le second dispositif d'image l'un à l'autre. Par conséquent, la première et la seconde image de détermination d'authenticité peuvent être réalisées.
PCT/KR2020/009966 2019-07-31 2020-07-29 Dispositif pour la empêcher la contrefaçon WO2021020870A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0093258 2019-07-31
KR1020190093258A KR102285751B1 (ko) 2019-07-31 2019-07-31 위조 방지용 소자

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WO2021020870A1 true WO2021020870A1 (fr) 2021-02-04

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008281912A (ja) * 2007-05-14 2008-11-20 Dainippon Printing Co Ltd ラベル
KR20100088465A (ko) * 2009-01-30 2010-08-09 한국조폐공사 광 회절 패턴이 적용된 보안 카드
JP2011033935A (ja) * 2009-08-04 2011-02-17 Toppan Printing Co Ltd 光学物品およびその製造方法
KR20180109472A (ko) * 2017-03-28 2018-10-08 고려대학교 산학협력단 진위 판정 장치 및 이의 제조 방법
KR20180111267A (ko) * 2017-03-31 2018-10-11 고려대학교 산학협력단 진위 판정 장치 및 이의 제조 방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100225450B1 (ko) * 1997-05-09 1999-10-15 이경식 직렬 연결된 브라그 회절격자를 이용한 협대역 투과 필터 및 그 필터를 이용한 파장분할 역다중화기
WO2007060648A2 (fr) * 2005-11-25 2007-05-31 Dublin Institute Of Technology Capteur holographique
JP5521475B2 (ja) 2009-10-07 2014-06-11 凸版印刷株式会社 画像形成体の製造方法及び画像形成体、並びに個人認証媒体の製造方法及び個人認証媒体
JP5948732B2 (ja) 2011-04-22 2016-07-06 凸版印刷株式会社 偽造防止媒体
WO2017138536A1 (fr) * 2016-02-09 2017-08-17 凸版印刷株式会社 Élément optique et support d'enregistrement d'informations pour la prévention de la contrefaçon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008281912A (ja) * 2007-05-14 2008-11-20 Dainippon Printing Co Ltd ラベル
KR20100088465A (ko) * 2009-01-30 2010-08-09 한국조폐공사 광 회절 패턴이 적용된 보안 카드
JP2011033935A (ja) * 2009-08-04 2011-02-17 Toppan Printing Co Ltd 光学物品およびその製造方法
KR20180109472A (ko) * 2017-03-28 2018-10-08 고려대학교 산학협력단 진위 판정 장치 및 이의 제조 방법
KR20180111267A (ko) * 2017-03-31 2018-10-11 고려대학교 산학협력단 진위 판정 장치 및 이의 제조 방법

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KR102285751B1 (ko) 2021-08-05
KR20210015031A (ko) 2021-02-10

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