CN108454266A - Optical anti-counterfeit element and optical anti-counterfeiting product - Google Patents
Optical anti-counterfeit element and optical anti-counterfeiting product Download PDFInfo
- Publication number
- CN108454266A CN108454266A CN201710089694.4A CN201710089694A CN108454266A CN 108454266 A CN108454266 A CN 108454266A CN 201710089694 A CN201710089694 A CN 201710089694A CN 108454266 A CN108454266 A CN 108454266A
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- China
- Prior art keywords
- micro
- optical anti
- coating
- picture
- counterfeit element
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Classifications
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- 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
-
- 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
- B42D25/373—Metallic materials
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- Credit Cards Or The Like (AREA)
Abstract
The present invention relates to optical anti-counterfeiting field, discloses a kind of optical anti-counterfeit element and optical anti-counterfeiting product, the optical anti-counterfeit element include：Base material, the base material include each other relative first surface and second surface；Form micro- sampling tool on the first surface；The micro- picture and text stroke being formed on the second surface, micro- picture and text stroke are formed by sub-wavelength structure；The first coating that similar shape covers on micro- picture and text stroke；And the second coating that similar shape covers on the region between micro- picture and text stroke of the second surface, wherein the region between micro- picture and text stroke and micro- picture and text stroke has difference in height.
Description
Technical field
The present invention relates to optical anti-counterfeiting field more particularly to a kind of optical anti-counterfeit elements and optical anti-counterfeiting product.
Background technology
Microlens array anti-counterfeiting technology adopts corresponding micro- picture and text array as sampling tool using microlens array
Sample is, it can be achieved that diversified animation effect, these effects include orthogonal innervation, sink, float, is three-dimensional, rotation, scale, is double
Channel etc. (see US2008/0036196A1).The forgery also occurred using similar techniques is widely used with the technology
Product.For example, adulterator can be used large-size, be more easy to the microlens array obtained, without using required by banknote security line
Small size (25 μm or so of diameter) microlens array, thus general printing technology can be used to make micro- word, and
The related process of unspecific fine field of microelectronics.Although effect is relatively rough, consistency is poor, this kind of counterfeit
Visual effect can substantially play the purpose mixed the spurious with the genuine.
Authorization Notice No. is that the Chinese patent of CN102975568B discloses the side for the coating that micro- embossment is covered using similar shape
The method that method makes micro- picture and text array realizes the combination of lenticule innervation feature and color and color change feature, improves anti-fake
Ability.But the reflection of the strong mirror-reflection of coating and lenticule-Air Interface causes image fuzzy, in certain lighting conditions
Under be unfavorable for the identification of anti-counterfeiting characteristic.
Invention content
The object of the present invention is to provide a kind of optical anti-counterfeit element and optical anti-counterfeiting products, to solve or at least partly solve
Certainly above-mentioned technological deficiency.
To achieve the goals above, one aspect of the present invention provides a kind of optical anti-counterfeit element, which includes：
Base material, the base material include each other relative first surface and second surface；Form micro- sampling tool on the first surface；
The micro- picture and text stroke being formed on the second surface, micro- picture and text stroke are formed by sub-wavelength structure；In micro- picture and text pen
Draw the first coating of similar shape covering；And similar shape covers on the region between micro- picture and text stroke of the second surface
The second coating, wherein region between micro- picture and text stroke and micro- picture and text stroke has difference in height.
Another aspect of the present invention provides a kind of optical anti-counterfeiting product, including above-mentioned optical anti-counterfeit element.
Through the above technical solutions, the region between micro- picture and text stroke and micro- picture and text stroke has difference in height, this can subtract
Ghost image caused by the strong mirror-reflection of few coating, improves image definition, so that the optical anti-counterfeit element can carry
For a kind of improved anti-counterfeiting characteristic for integrating dynamic graphics and text feature and color change feature, to adapt to general lighting environment.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the sectional view according to the optical anti-counterfeit element of one embodiment of the present invention；
Fig. 2 is the sectional view according to the optical anti-counterfeit element of one embodiment of the present invention；
Fig. 3 is the sectional view according to the optical anti-counterfeit element of one embodiment of the present invention；
Fig. 4 is the diagrammatic cross-section according to the second surface of the optical anti-counterfeit element of one embodiment of the present invention；And
Fig. 5 is the height that optical anti-counterfeit element according to the present invention is used in a manner of opened window safety line, form pad pasting, labeling etc.
Anti-counterfeit printing.
Specific implementation mode
Optical anti-counterfeit element according to the present invention is described in detail below in conjunction with attached drawing and including the optical anti-counterfeit element
Optical anti-counterfeiting product.It should be appreciated that the attached drawing and detailed description are description of the preferred embodiment of the present invention, not
It limits the scope of the invention in any way.Also, it will be appreciated by those skilled in the art that the gray scale in all attached drawings
And dimension scale is only schematical, does not represent actual color and dimension scale.
As shown in Figure 1, may include base material 12, the base according to the optical anti-counterfeit element 1 of one embodiment of the present invention
Material 12 includes each other relative first surface and second surface, is covered with micro- sampling tool 11 on the first surface, and described the
It is region between micro- picture and text stroke that the part on two surfaces, which is by micro- picture and text stroke, another part that sub-wavelength structure 13 is formed,
The region of micro- picture and text stroke (be do not formed), in optical anti-counterfeit element shown in Fig. 1, the region between micro- picture and text stroke is
Flat site 15, there are difference in height h between sub-wavelength structure 13 and flat site 15, and flat site 15 is compared with sub-wavelength structure 13
Protrusion.It forms similar shape on the sub-wavelength structure 13 of micro- picture and text stroke and is covered with the first coating 14, do not form micro- picture and text stroke
15 similar shape of flat site be covered with the second coating 16 so that sub-wavelength structure 13 and flat site 15 have visibly different face
Color.Moreover, observing second surface by micro- sampling tool 11, it can be seen that amplification, colored, with various animation effects
Macroscopic view amplification picture and text, when changing viewing angle, color change can occur for macroscopic view amplification picture and text and/or its background.
In a preferred embodiment according to the present invention, the base material 12 can be to the coloured of visible transparent or
Colourless film, such as can be by any one film constituted in following material：Poly terephthalic acid diol ester, polychlorostyrene
Ethylene, polyethylene, makrolon, polypropylene, metal, glass and paper etc..The thickness of the base material 12 preferably with micro- sample man
The focal length of tool 11 matches.
In a preferred embodiment according to the present invention, micro- sampling tool 11 can be microlens array, example
It such as can be one kind or combinations thereof in cylindrical lens array, globe lens array, fresnel lens array.Certainly, micro- sample man
Tool 11 can also be other kinds of microlens array, as long as it can realize the sampling to micro- picture and text.
First coating 14 or second coating 16 can be optionally the interference that can generate color and/or color change
Coating.
First coating 14 and the second coating 16 number of plies and material having the same, but the thickness of wherein each layer may be different
's.In a preferred embodiment according to the present invention, the coating 14 and coating 16 can be single-layer or multi-layer, total
Thickness can be 10nm to 1000nm.Coating 14 and coating 16 in embodiment of the present invention may include in following various coating
Any one or combinations thereof：Single-layer metal coating；Multiple layer metal coating；By absorbed layer, low refractive index dielectric layer and reflecting layer
The coating of formation, the wherein absorbed layer are closer to the second surface, i.e. the absorbed layer and the sub-wavelength structure or described micro-
Region between picture and text stroke is in contact；High refractive index medium layer coating；By the first high refractive index medium layer, low refractive index dielectric
Layer and the second high refractive index medium layer stack gradually the multi-medium-layer coating to be formed；And by absorbed layer, high refractive index medium layer
The coating to be formed is stacked gradually with reflecting layer, wherein the absorbed layer is closer to the second surface, i.e. the absorbed layer and the Asia
Region between wavelength structure or micro- picture and text stroke is in contact.In embodiments of the present invention, high refractive index refers to
Refractive index is more than or equal to 1.7, and low-refraction refers to that refractive index is less than 1.7.The material of the coat of metal can be gold, silver, copper,
The metals such as aluminium, iron, tin, zinc, nickel, chromium or its alloy；High refractive index medium material can be ZnS, TiN, TiO2、TiO、Ti2O3、
Ti3O5、Ta2O5、Nb2O5、CeO2、Bi2O3、Cr2O3、Fe2O3、HfO2, ZnO etc., low refractive index dielectric material can be MgF2、
SiO2Deng；It can be or mixtures thereof metals such as chromium, nickel, copper, cobalt, titanium, vanadium, tungsten, tin, silicon, germanium and alloy to absorb layer material；Instead
The material for penetrating layer can be or mixtures thereof metals such as gold, silver, copper, aluminium and alloy.
In a preferred embodiment according to the present invention, the sub-wavelength structure height relief may range from
30nm to 300nm, periodic regime can be 100nm to 500nm.
In a preferred embodiment according to the present invention, there are differences in height between sub-wavelength structure 13 and flat site 15
H, h's may range from 0.3 μm to 3 μm.
As shown in Fig. 2, may include base material 22, the base according to the optical anti-counterfeit element 2 of one embodiment of the present invention
Material 22 includes each other relative first surface and second surface, is covered with micro- sampling tool 21 on the first surface, and described the
It is region between micro- picture and text stroke that the part on two surfaces, which is by micro- picture and text stroke, another part that sub-wavelength structure 23 is formed,
The region of micro- picture and text stroke (be do not formed), in optical anti-counterfeit element shown in Fig. 2, the region between micro- picture and text stroke is
Flat site 25.There are difference in height h between sub-wavelength structure 23 and flat site 25, and 23 flatter region 25 of sub-wavelength structure
Protrusion.It forms similar shape on the sub-wavelength structure 23 of micro- picture and text stroke and is covered with the first coating 24, do not form micro- picture and text stroke
25 similar shape of flat site be covered with the second coating 26 so that 23 region of structure and flat site 25 have visibly different face
Color, wherein the first coating 24 and the second coating 26 can be with the number of plies having the same and materials, but the thickness of wherein each layer may be
Different.Moreover, pass through micro- sampling tool 21 observe second surface, it can be seen that it is amplification, colored, have various animations effect
The macroscopic view amplification picture and text of fruit, when changing viewing angle, color change can occur for macroscopic view amplification picture and text and/or its background.
Optical anti-counterfeit element shown in Fig. 2 and optical anti-counterfeit element shown in FIG. 1 difference lies in sub-wavelength structure 23 compared with
25 protrusion of flat site.
As shown in figure 3, may include base material 32, the base according to the optical anti-counterfeit element 3 of one embodiment of the present invention
Material 32 includes each other relative first surface and second surface, is covered with micro- sampling tool 31 on the first surface, and described the
The part on two surfaces is the micro- picture and text stroke formed by sub-wavelength structure 35, another part is to be formed by random scatter structure 33
Micro- picture and text stroke between region.There are difference in height h, sub-wavelength structures between sub-wavelength structure 35 and random scatter structure 33
35 more random diffusing structure, 33 protrusion or recess.It forms similar shape on the sub-wavelength structure 35 of micro- picture and text stroke and is covered with
One coating 36 does not form similar shape in the random scatter structure 33 of micro- picture and text stroke and is covered with the second coating 34 so that sub-wavelength knot
The region of structure 35 has visibly different color with the region of random scatter structure 33, wherein the first coating 36 and the second coating
34 can be with the number of plies having the same and material, but the thickness of wherein each layer may be different.Moreover, passing through micro- sampling tool 31
Observe second surface, it can be seen that amplification, colored macroscopic view amplification picture and text with various animation effects.Change viewing angle
When spending, macroscopic view, which amplifies picture and text and/or its background, can occur the variation of color.
Difference lies in by sub-wavelength structure 35 with optical anti-counterfeit element shown in FIG. 1 for optical anti-counterfeit element shown in Fig. 3
Region between the micro- picture and text stroke formed uses random scatter structure 33, and the periodic regime of optional random scatter structure 33 can
Think 0.5 μm to 5 μm, depth bounds can be 0.05 μm to 0.3 μm, and period and depth change at random within the above range.With
Machine diffusing structure is alternatively the micro-reflector of non-diffraction type, and periodic regime is 5 μm to 20 μm, and depth bounds are 0.5 μm to 3 μ
M, azimuth coverage can be 0 ° to 360 °, and period, depth and azimuth can randomly select within the above range, to be formed in
Matte effect under various lighting environments.Random scatter structure 33 can further weaken ghost image defect in the prior art.
As shown in figure 4, structure 45 is the diagrammatic cross-section of the second surface of the optical anti-counterfeit element, i.e., micro- picture and text stroke
Section.The schematic diagram of Fig. 4 can explain that the difference in height h in the above embodiment subtracts ghost image defect in the prior art
Weak basic principle.Area in the embodiment of Fig. 1 to Fig. 3 of the present invention between the micro- picture and text stroke being arranged and micro- picture and text stroke
The presence of the difference in height h in domain can limit the inclination angle theta of reflection light.The inclination angle theta as shown in Figure 4 is arctan (W/2h), wherein W
For the width of micro- picture and text stroke, the reflection light 44 more than the incident ray 43 at the inclination angle can not be emitted, and less than the inclination angle
The reflection light 42 of incident ray 41 can be emitted.The interface that considers micro- sampling tool and air exists and is determined by refractive index
Alinternal reflection angle.The refractive index of micro- sampling tool and base material is about 1.5, which is about 42 °, is more than the angle and is emitted
Light will be reflected at the interface of micro- sampling tool and air, cause ghost image and image fuzzy.If above-mentioned inclination angle theta≤42 °,
I.e. so that h >=W/ (2*tan (42 °)) ≈ W/1.79, then causing the reflection light 44 of ghost image that will be limited originally, to weaken
Or eliminate the ghost image defect of the prior art.
Can be applied to banknote, identity document, marketable securities etc. according to the optical anti-counterfeit element of the present invention has high added value
Product, moreover, it can be used in a manner of opened window safety line, windowing joint strip, labeling etc. on these high value added products.Figure
5 show the schematic diagram that the optical anti-counterfeit element according to embodiment of the present invention uses on height anti-counterfeit printed 5 in different ways.
The optical anti-counterfeit element can form opened window safety line 6, windowing safety by the prior art in anti-forge paper manufacturing process
In the segmentation insertion of line 6 printed matter 5, rest part is located at 5 surface of printed matter；According to the optical anti-counterfeit element of embodiment of the present invention
It can also be adhered on the surface of printed matter 5 in a manner of labeling 7；May be used also according to the optical anti-counterfeit element of embodiment of the present invention
To be adhered on the surface of printed matter 5 in a manner of wide item 8, and there are a window 81 (form), shapes in 8 region of wide item
Shape and size are arbitrary, and the window 81 is by obtaining the part removal of printed matter 5, through the transmission of the wide item of 81 observable of window 8
Anti-counterfeiting characteristic.Any one or its arbitrary combination in opened window safety line 6, labeling 7, wide item 8 can be used in printed matter 5.
Another aspect of the present invention provides the product for including the optical anti-counterfeit element, and the product includes but not limited to paper money
All kinds of high safety products such as ticket, credit card, passport, identity document, marketable securities and high value added product and all kinds of packagings
Paper, packing box etc..
In the scheme that the embodiment of above of the application provides, the region tool between micro- picture and text stroke and micro- picture and text stroke
There is difference in height, this can reduce the ghost image caused by the strong mirror-reflection of coating, image definition be improved, so that the light
It learns Security element and is capable of providing a kind of improved anti-counterfeiting characteristic for integrating dynamic graphics and text feature and color change feature, to adapt to
General lighting environment.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (12)
1. a kind of optical anti-counterfeit element, which is characterized in that the optical anti-counterfeit element includes：
Base material, the base material include each other relative first surface and second surface；
Form micro- sampling tool on the first surface；
The micro- picture and text stroke being formed on the second surface, micro- picture and text stroke are formed by sub-wavelength structure；
The first coating that similar shape covers on micro- picture and text stroke；And
The second coating that similar shape covers on region between micro- picture and text stroke of the second surface,
Wherein, the region between micro- picture and text stroke and micro- picture and text stroke has difference in height.
2. optical anti-counterfeit element according to claim 1, which is characterized in that
Region between micro- picture and text stroke is flat site, and the sub-wavelength structure is raised or recessed relative to the flat site
It falls into.
3. optical anti-counterfeit element according to claim 1, which is characterized in that
Region between micro- picture and text stroke is formed by random scatter structure, and the sub-wavelength structure is relative to the random scatter
Structure is raised or sunken.
4. optical anti-counterfeit element according to claim 1, which is characterized in that the fluctuating of the sub-wavelength structure is ranging from
30nm to 300nm.
5. optical anti-counterfeit element according to claim 1, which is characterized in that the periodic regime of the sub-wavelength structure is
100nm to 500nm.
6. optical anti-counterfeit element according to claim 1, which is characterized in that ranging from 0.3 μm of the difference in height to 3 μ
m。
7. optical anti-counterfeit element according to claim 1, which is characterized in that micro- sampling tool is microlens array.
8. optical anti-counterfeit element according to claim 8, which is characterized in that the microlens array is one of following
Or arbitrary combination：Cylindrical lens array, globe lens array and fresnel lens array.
9. optical anti-counterfeit element according to claim 1, which is characterized in that first coating or second coating are
The interference coating of color and/or color change can be generated.
10. optical anti-counterfeit element according to claim 1, which is characterized in that first coating or second coating
For one of following or arbitrary combination：Single-layer metal coating, multiple layer metal coating, by absorbed layer, low refractive index dielectric layer and
Reflecting layer formed coating, high refractive index medium layer coating, by the first high refractive index medium layer, low refractive index dielectric layer and second
High refractive index medium layer stacks gradually the multi-medium-layer coating to be formed and by absorbed layer, high refractive index medium layer and reflecting layer
Stack gradually the coating to be formed.
11. optical anti-counterfeit element according to claim 1, which is characterized in that the base material is by appointing in following material
The coloured or colorless film to visible transparent that one of anticipating is constituted：
Poly terephthalic acid diol ester, polyvinyl chloride, polyethylene, makrolon, polypropylene, metal, glass and paper.
12. a kind of optical anti-counterfeiting product, which is characterized in that including according to any one of claim 1 to 11 claim institute
The optical anti-counterfeit element stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089694.4A CN108454266B (en) | 2017-02-20 | 2017-02-20 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089694.4A CN108454266B (en) | 2017-02-20 | 2017-02-20 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
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| Publication Number | Publication Date |
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| CN108454266A true CN108454266A (en) | 2018-08-28 |
| CN108454266B CN108454266B (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020173494A1 (en) * | 2019-02-28 | 2020-09-03 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and anti-counterfeiting product |
| WO2021103670A1 (en) * | 2019-11-27 | 2021-06-03 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
| WO2023005996A1 (en) * | 2021-07-28 | 2023-02-02 | 中钞特种防伪科技有限公司 | Customizable anti-counterfeiting element and anti-counterfeiting product |
| WO2023082729A1 (en) * | 2021-11-15 | 2023-05-19 | 中钞特种防伪科技有限公司 | Anti-counterfeiting element and anti-counterfeiting product |
| WO2024153209A1 (en) * | 2023-01-18 | 2024-07-25 | 昇印光电（昆山）股份有限公司 | Optical imaging device |
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| CN102975568A (en) * | 2012-05-30 | 2013-03-20 | 中钞特种防伪科技有限公司 | Optical anti-fake component and products using the same and preparation method of optical anti-fake component |
| CN104136944A (en) * | 2011-12-20 | 2014-11-05 | 德国捷德有限公司 | Security element for security papers, documents of value, or similar |
| CN104704401A (en) * | 2012-11-19 | 2015-06-10 | 凸版印刷株式会社 | Counterfeit prevention structure body and fabrication method therefor |
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| US20100320742A1 (en) * | 2008-02-12 | 2010-12-23 | Giesecke & Devrient Gmbh | Security element and method for producing the same |
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| CN102975568A (en) * | 2012-05-30 | 2013-03-20 | 中钞特种防伪科技有限公司 | Optical anti-fake component and products using the same and preparation method of optical anti-fake component |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020173494A1 (en) * | 2019-02-28 | 2020-09-03 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and anti-counterfeiting product |
| WO2021103670A1 (en) * | 2019-11-27 | 2021-06-03 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
| WO2023005996A1 (en) * | 2021-07-28 | 2023-02-02 | 中钞特种防伪科技有限公司 | Customizable anti-counterfeiting element and anti-counterfeiting product |
| WO2023082729A1 (en) * | 2021-11-15 | 2023-05-19 | 中钞特种防伪科技有限公司 | Anti-counterfeiting element and anti-counterfeiting product |
| WO2024153209A1 (en) * | 2023-01-18 | 2024-07-25 | 昇印光电（昆山）股份有限公司 | Optical imaging device |
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| Publication number | Publication date |
|---|---|
| CN108454266B (en) | 2020-09-29 |
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