WO2016068143A1 - 凹凸構造体及びセキュリティ媒体 - Google Patents
凹凸構造体及びセキュリティ媒体 Download PDFInfo
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- WO2016068143A1 WO2016068143A1 PCT/JP2015/080274 JP2015080274W WO2016068143A1 WO 2016068143 A1 WO2016068143 A1 WO 2016068143A1 JP 2015080274 W JP2015080274 W JP 2015080274W WO 2016068143 A1 WO2016068143 A1 WO 2016068143A1
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- Prior art keywords
- lattice
- concavo
- unit
- convex
- scattering
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- 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
- B42D25/324—Reliefs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
- G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1861—Reflection gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
Definitions
- the present invention relates to a concavo-convex structure and a security medium that prevent forgery of an article by being attached or transferred to the article or the like.
- Patent Document 1 has a problem that, if observed as it is, the angle range in which the reflected light is bright and red or green can be observed becomes narrow.
- the present invention provides a concavo-convex structure and a security medium that have a simple structure, can be easily manufactured at low cost, and can improve visibility.
- the concavo-convex structure according to the present invention for achieving the above object is Comprising a lattice structure having a lattice formed at a predetermined angle;
- the lattice structure part includes a scattering structure part having a property of scattering light.
- the uneven structure according to the present invention is
- the lattice structure portion includes a first unit structure portion and a second unit structure portion having a different configuration with respect to the first unit structure portion,
- the scattering structure is formed so that a scattering action is generated by different structures of the first unit structure and the second unit structure.
- the uneven structure according to the present invention is
- the first unit structure part and the second unit structure part are formed according to phase information of a Fourier transform pattern.
- the uneven structure according to the present invention is
- the second unit structure part may be formed so as to be at least partially shifted in a two-dimensional direction with respect to the first unit structure part.
- the uneven structure according to the present invention is At least one of the first unit structure part and the second unit structure part has a non-lattice part at least in part.
- the uneven structure according to the present invention is
- the second unit structure portion may be different in shape from at least a part of the first unit structure portion.
- the uneven structure according to the present invention is
- the lattice structure is A first region having a first lattice formed at a predetermined angle; And a second region having a second grating rotated by a predetermined angle with respect to the first grating, It is characterized by having.
- the security medium according to the present invention is: The concavo-convex structure; A refractive index layer formed on the surface of the concavo-convex structure, An adhesive layer formed on the surface of the refractive index layer; It is characterized by providing.
- the security document according to the present invention is: It has the said uneven structure body, It is characterized by the above-mentioned.
- FIG. 1 An example of a security medium including the concavo-convex structure of the present embodiment in which a grating is formed according to the phase information of the Fourier transform pattern is shown.
- lattice structure part containing the scattering structure part of 1st Embodiment is shown.
- lattice structure part containing the scattering structure part of 2nd Embodiment is shown.
- lattice structure part containing the scattering structure part of 3rd Embodiment is shown.
- FIG. 1 is a view of the concavo-convex structure of the present embodiment as seen from a predetermined direction.
- FIG. 2 is a view of the concavo-convex structure of the present embodiment as viewed by being rotated 90 ° from a predetermined direction.
- the concavo-convex structure body 1 includes a first region 1 a constituting a background and a second region 1 b constituting a character.
- the first region 1 a is formed of a first lattice 11 of a vertical lattice
- the second region 1 b is a second lattice of horizontal lattices rotated by 90 ° with respect to the vertical lattice.
- Two lattices 12 are formed.
- the first grating 11 is formed with a grating pitch of about 370 nm and a depth of about 100 nm, and forms a first region 1a that looks red in the state of FIG.
- the second grating 12 is formed with a grating pitch of about 370 nm and a depth of about 100 nm, and forms a second region 1b that looks green in the state of FIG.
- the concavo-convex structure 1 formed in this way is rotated by 90 ° from the state shown in FIG. 1 to the state shown in FIG. 2, the first lattice 11 becomes a horizontal lattice, and the second lattice 12 becomes 90 with respect to the horizontal lattice. ° Rotated vertical lattice.
- the first lattice 11 becomes the first region 1a that looks green in the state of FIG. 2, and the second lattice 12 becomes the second region 1b that looks red in the state of FIG.
- the first grid 11 and the second grid 12 are formed so as to look red and green.
- the present invention is not limited to this, and the pitch or depth of the grid is adjusted to change to another color. May be.
- the pitch of the grating is as long as or shorter than the wavelength of visible light. For example, it is preferably 500 nm or less.
- the concavo-convex structure 1 formed in this way is observed as it is, the angle range in which the reflected light is bright and red or green can be observed is narrow. Therefore, in this embodiment, a structure that scatters reflected light is used.
- a structure that scatters reflected light a conventional structure in which a diffusion layer is added increases the thickness, and the cost increases as the number of materials used increases. Scatter light.
- the scattering structure will be described.
- the concavo-convex structure body 1 of the present embodiment it is possible to form a scattering structure portion by forming a grating in a Fourier transform pattern or the like, and to realize the dimming function and the diffusion function only with the concavo-convex shape.
- FIG. 3 shows an example of a security medium 100 including the concavo-convex structure 1 of the present embodiment in which a lattice is formed according to the phase information of the Fourier transform pattern.
- a part of the lattice structure portion 10 has a structure different from the other portions.
- a scattering structure having a scattering action is formed.
- a refractive index layer is deposited on the surface of the Fourier transform pattern 20 on which the lattice structure portion 10 is formed.
- a high refractive index layer 30 of zinc sulfide ZnS having a refractive index of 2.3 is deposited by about 100 nm.
- the high refractive index layer 30 is not limited to zinc sulfide ZnS, but may be any high refractive index material such as titanium oxide.
- a heat seal layer 40 is formed as an adhesive layer.
- the concavo-convex structure 1 and the high refractive index layer 30 are bonded to the adherend 60 via the heat seal layer 40.
- the adherend 60 is also referred to as an ID certificate, a license, a passport, a banknote, a cash voucher, a passbook, a public certificate, a brand protection label, or any other article that requires anti-counterfeiting (ie, “Security Document”). ).
- the security medium 100 can be obtained by peeling the substrate.
- a release layer may be provided between the base material and the concavo-convex structure 1.
- the Fourier transform pattern may be formed by the method described in Japanese Patent Application Laid-Open No. 2001-337484 or Japanese Patent Application Laid-Open No. 2011-123266. Further, as described in Japanese Patent Application Laid-Open No. 2007-15196, the concavo-convex structure 1 is transmitted or reflected through the concavo-convex structure 1 on which a Fourier transform pattern is applied, and a point light source is observed, or the concavo-convex structure When laser light is incident on 1 and the transmitted light or reflected light is observed, a predetermined image may be observed.
- FIG. 4 shows a lattice structure including the scattering structure of the first embodiment.
- the lattice structure unit 10 includes a first unit structure unit 10a and a second unit structure unit 10b.
- the first unit structure unit 10a and the second unit structure unit 10b shift the left and right or upper and lower positions of the grating two-dimensionally in the plane forming the grating according to the phase information of the Fourier transform pattern, and It is a thing.
- the first unit structure unit 10a when the phase of the Fourier transform pattern is binary of 0 and ⁇ , the first unit structure unit 10a is formed in the phase 0 portion as shown in FIG. In the phase ⁇ portion, the second unit structure portion 10b is formed that is shifted in a direction orthogonal to the lattice line by half the lattice pitch.
- the concavo-convex structure body 1 of the present embodiment forms a grating including a scattering structure portion in one step without adding a scattering layer by forming a grating according to the phase information of the Fourier transform pattern. Therefore, it has a simple structure, can be easily manufactured at low cost, and visibility can be improved.
- FIG. 5 shows a lattice structure including the scattering structure of the second embodiment.
- the lattice structure unit 10 of the second embodiment has a non-lattice part in at least a part of the first unit structure unit 10a and the second unit structure unit 10b.
- the first unit structure part 10a when the phase of the Fourier transform pattern is binary of 0 and ⁇ , the first unit structure part 10a is formed in the phase 0 part as shown in FIG.
- a non-lattice portion 10c that does not form a lattice is used, and the first unit structure portion 10a, the second unit structure portion 10b, and the non-lattice portion 10c serve as a scattering structure portion.
- the non-lattice part 10c should just exist in at least one part of the 1st unit structure part 10a and the 2nd unit structure part 10b.
- the concavo-convex structure body 1 of the present embodiment forms a grating including a scattering structure portion in one step without adding a scattering layer by forming a grating according to the phase information of the Fourier transform pattern.
- it has a simpler structure, can be easily manufactured at a low cost, and can improve visibility.
- FIG. 6 shows a lattice structure including the scattering structure of the third embodiment.
- the lattice structure unit 10 of the third embodiment includes a first unit structure unit 10a and a second unit structure unit 10b.
- the first unit structure portion 10a and the second unit structure portion 10b are shifted in the depth direction of the grating and have different shapes according to the phase information of the Fourier transform pattern to form scattering structure portions.
- the first unit structure unit 10a when the phase of the Fourier transform pattern is binary of 0 and ⁇ , the first unit structure unit 10a is formed in the phase 0 part as shown in FIG.
- the second unit structure portion 10b having a different shape by shifting, for example, 90 nm in the depth direction in the phase ⁇ portion is formed.
- the concavo-convex structure body 1 of the present embodiment forms a grating according to the phase information of the Fourier transform pattern 20, and thus, without adding a scatter layer, the concavo-convex structure can be replicated in a single step.
- Can be formed has a simple structure, can be easily manufactured at low cost, and can improve visibility.
- FIG. 7 shows a lattice structure including a scattering structure according to another embodiment.
- the scattering pattern 50 has a structure in which fine convex portions 51 formed on the surface are used as scattering elements.
- the lattice structure is shown only on the upper surface of the convex portion 51, but the lattice structure may be formed in the concave portion 52. That is, it may be formed in at least one of the convex portion 51 and the concave portion 52.
- the concavo-convex structure body 1 can form a lattice including the scattering structure portion in one step without forming a scattering layer by forming a lattice on the scattering pattern 50. It has a simple structure, can be easily manufactured at low cost, and can improve visibility.
- the lattice structure unit 10 having a lattice formed at a predetermined angle is provided, and the lattice structure unit 10 has scattering properties 20 and 50 having the property of scattering light. Therefore, it has a simple structure, can be easily manufactured at low cost, and can improve visibility.
- the lattice structure unit 10 includes the first unit structure unit 10a and the second unit structure unit 10b having a different configuration with respect to the first unit structure unit 10a.
- the scattering structures 20 and 50 are formed so that the scattering action is generated by the different structures of the first unit structure 10a and the second unit structure 10b, so that the structure is simpler and easy at low cost. Can be manufactured.
- first unit structure portion 10a and the second unit structure portion 10b are formed according to the phase information of the Fourier transform pattern, the visibility can be further improved.
- the second unit structure portion 10b is formed so as to be shifted at least partially in the two-dimensional direction with respect to the first unit structure portion 10a.
- the second unit structure portion 10b can be easily manufactured at a low cost and the visibility can be improved.
- At least one of the first unit structure portion 10a and the second unit structure portion 10b has a lattice-free portion at least in part, and thus has a simpler structure. Thus, it can be easily manufactured at low cost, and the visibility can be improved.
- the second unit structure portion 10b differs from the first unit structure portion 10a in at least part of its shape, so that it has a simpler structure and lower cost. In addition to being easy to manufacture, it is possible to improve visibility.
- the lattice structure unit 10 includes the first region 1 a having the first lattice 11 formed at a predetermined angle and a predetermined angle with respect to the first lattice 11. Since it has the 2nd field 1b which has the rotated 2nd lattice 12, it becomes possible to improve visibility further.
- the uneven structure 1, the high refractive index layer 30 formed on the surface of the uneven structure 1, and the heat seal layer 40 formed on the surface of the high refractive index layer 30 Therefore, it has a simple structure, can be easily manufactured at low cost, and can improve visibility.
- the concavo-convex structure and the security medium have been described based on some examples, but the present invention is not limited to these examples, and various combinations or modifications are possible.
Abstract
Description
所定の角度で形成される格子を有する格子構造部を備え、
前記格子構造部は、光を散乱させる性質を有する散乱構造部を含む
ことを特徴とする。
前記格子構造部は、第1単位構造部と、前記第1単位構造部に対して異なる構成の第2単位構造部と、を有し、
前記散乱構造部は、前記第1単位構造部と前記第2単位構造部の異なる構造によって散乱作用が生じるように形成される
ことを特徴とする。
前記第1単位構造部及び前記第2単位構造部は、フーリエ変換パターンの位相情報にしたがって形成される
ことを特徴とする。
前記第1単位構造部に対して前記第2単位構造部は、少なくとも一部が2次元方向にずらして形成される
ことを特徴とする。
前記第1単位構造部又は前記第2単位構造部のうち少なくとも一方は、少なくとも一部に無格子部分を有する
ことを特徴とする。
前記第1単位構造部に対して前記第2単位構造部は、少なくとも一部の形状が異なる
ことを特徴とする。
前記格子構造部は、
所定の角度で形成される第1格子を有する第1領域、
及び
前記第1格子に対して所定の角度回転した第2格子を有する第2領域、
を有する
ことを特徴とする。
前記凹凸構造体と、
前記凹凸構造体の表面に形成される屈折率層と、
前記屈折率層の表面に形成される接着層と、
を備えることを特徴とする。
前記凹凸構造体を有する
ことを特徴とする。
1a…第1領域
1b…第2領域
11…第1格子
12…第2格子
10…格子構造部
10a…第1単位構造部
10b…第2単位構造部
20…フーリエ変換パターン(散乱構造部)
30…高屈折率層
40…ヒートシール層(接着層)
50…散乱パターン(散乱構造部)
100…セキュリティ媒体
Claims (9)
- 所定の角度で形成される格子を有する格子構造部を備え、
前記格子構造部は、光を散乱させる性質を有する散乱構造部を含む
ことを特徴とする凹凸構造体。 - 前記格子構造部は、第1単位構造部と、前記第1単位構造部に対して異なる構成の第2単位構造部と、を有し、
前記散乱構造部は、前記第1単位構造部と前記第2単位構造部の異なる構造によって散乱作用が生じるように形成される
ことを特徴とする請求項1に記載の凹凸構造体。 - 前記第1単位構造部及び前記第2単位構造部は、フーリエ変換パターンの位相情報にしたがって形成される
ことを特徴とする請求項2に記載の凹凸構造体。 - 前記第1単位構造部に対して前記第2単位構造部は、少なくとも一部が2次元方向にずらして形成される
ことを特徴とする請求項2又は請求項3に記載の凹凸構造体。 - 前記第1単位構造部及び前記第2単位構造部は、少なくとも一部に無格子部分を有する
ことを特徴とする請求項2乃至請求項4のいずれか1つに記載の凹凸構造体。 - 前記第1単位構造部に対して前記第2単位構造部は、少なくとも一部の形状が異なる
ことを特徴とする請求項2乃至請求項5のいずれか1つに記載の凹凸構造体。 - 前記格子構造部は、
所定の角度で形成される第1格子を有する第1領域、
及び
前記第1格子に対して所定の角度回転した第2格子を有する第2領域、
を有する
ことを特徴とする請求項1乃至請求項6のいずれか1つに記載の凹凸構造体。 - 請求項1乃至請求項7のいずれか1項に記載された凹凸構造体と、
前記凹凸構造体の表面に形成される屈折率層と、
前記屈折率層の表面に形成される接着層と、
を備えることを特徴とするセキュリティ媒体。 - 請求項1乃至請求項8のいずれか1項に記載された凹凸構造体を有する
ことを特徴とするセキュリティドキュメント。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201580058986.0A CN107111019B (zh) | 2014-10-28 | 2015-10-27 | 凹凸构造体及安全介质 |
US15/521,029 US20170357036A1 (en) | 2014-10-28 | 2015-10-27 | Relief structure and security medium |
JP2016530030A JP6044815B2 (ja) | 2014-10-28 | 2015-10-27 | 凹凸構造体及びセキュリティ媒体 |
EP15856069.8A EP3214469A4 (en) | 2014-10-28 | 2015-10-27 | Rugged structure and security medium |
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JP2014218924 | 2014-10-28 | ||
JP2014-218924 | 2014-10-28 |
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WO2016068143A1 true WO2016068143A1 (ja) | 2016-05-06 |
Family
ID=55857478
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US (1) | US20170357036A1 (ja) |
EP (1) | EP3214469A4 (ja) |
JP (1) | JP6044815B2 (ja) |
CN (1) | CN107111019B (ja) |
WO (1) | WO2016068143A1 (ja) |
Cited By (1)
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JP2019049621A (ja) * | 2017-09-08 | 2019-03-28 | 大日本印刷株式会社 | 光変調素子および情報記録媒体 |
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- 2015-10-27 WO PCT/JP2015/080274 patent/WO2016068143A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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CN107111019B (zh) | 2020-11-20 |
EP3214469A4 (en) | 2018-07-25 |
JPWO2016068143A1 (ja) | 2017-04-27 |
US20170357036A1 (en) | 2017-12-14 |
CN107111019A (zh) | 2017-08-29 |
JP6044815B2 (ja) | 2016-12-14 |
EP3214469A1 (en) | 2017-09-06 |
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