CN104223620A - Coin medal - Google Patents
Coin medal Download PDFInfo
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- CN104223620A CN104223620A CN201310247083.XA CN201310247083A CN104223620A CN 104223620 A CN104223620 A CN 104223620A CN 201310247083 A CN201310247083 A CN 201310247083A CN 104223620 A CN104223620 A CN 104223620A
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Abstract
The invention provides a coin medal. The coin medal comprises a coin medal matrix, a surface microstructure covering at least one part of the surface of the coin medal matrix and a plating layer covering the surface microstructure, wherein the surface microstructure is an any surface structure capable of modulating incident light or a combination of all the surface structures, and the plating layer is matched with the surface microstructure so that the expected anti-fake characteristic that the color is changed along with light is obtained. According to the coin medal, the surface microstructure of the coin medal can be used for freely modulating the incident light and can be combined with the plating layer to realize the abundant characteristic that the color is changed along with light, so that the process feasibility of the coin medal provided by the invention is strong, and a coin, a souvenir coin and a souvenir medal can have better visual effects and stronger anti-fake abilities.
Description
Technical field
The present invention relates to anti-counterfeit field, particularly relate to a kind of coin chapter.
Background technology
At present, the Techniques of Optical Security be applied on coin and chapter has a variety of, and as technology such as stealth engraving, hologram image, colours, they significantly improve the anti-forgery ability of coin chapter, achieve good practical application effect.
Stealthy engraving is the technique of carrying out multiple engraving on coin chapter surface.Have employed the hard chapter of stealthy engraving technology, same engraving burr pattern can present the image of different content in different viewing angles.Namely can see a kind of image from a certain angle, when tilting or deflect sculptured surface, there is another kind of image in this picture drop-out.
The coin chapter comprising hologram image is in coin chapter picture on surface generative process, adopt the mould pressing process of coin chapter form optical grating construction on its surface thus form rainbow holography feature, but rainbow holography feature defect is that its color characteristic depends on incident light direction and direction of observation consumingly, be unfavorable for describing and identifying.
Colour graphics art is fused in coinage technology, utilizes special forme bat printing to coin chapter surface red, yellow, blue, black four color inks, substantially increase artistic appreciating effect and the anti-counterfeit capability of product.In addition, coin Zhang Benshen also can provide metallochrome, or applies coating by surface and realize color characteristic, but these color characteristics all come from metal base or coating material itself to the absorption of light and reflectivity properties.
In order to ensure the anti-counterfeiting resistance of coin, commemorative coin, souvenir badge, need to constantly update the Techniques of Optical Security that coin chapter adopts.
Summary of the invention
Present inventor finds, light become coating technology because different colors can be presented under different viewing angles, be convenient to describe, be easy to the public and identify and the electronic equipments such as camera, scanner, printer cannot be utilized to imitate or to copy and to be widely used in the public of the contour false proof marketable securities of banknote false proof.But, have not yet to see and light is become coating technology be applied on coin and chapter, and present inventor's coin chapter just two kinds of technology or product of finding to adopt light to become coating technology is integrated, but the combination that can become coating and coin chapter based on light forms anti-counterfeiting characteristic enriches, the coin chapter product of distinct characteristics, it has higher sight, higher reserve value and anti-counterfeit capability.
Present inventor also finds that the optical security features formed after forming light on coin chapter becomes coating only depends on coating itself usually, although the coating of patterning further can be provided, but the feature that light becomes coating itself to be provided is more single, certainly, what coin chapter surface adopted the technique such as punching press to be formed can become coating with light by the embossment touching perception is combined and is conducive to provide abundant anti-counterfeiting characteristic, but still it is more limited, and utilize surface micro-structure to become to light the anti-counterfeiting characteristic that coating modulation can enrich coin chapter to a greater degree, particularly size is greater than to the surface micro-structure of 2 μm, itself is the obvious cancellation diffraction rainbow phenomena of rainbow holography structure, possesses the clear and definite observation feature being easy to describe.
The application provides a kind of coin chapter, the coating that this coin chapter comprises coin Zhang Jicai, covers the surface micro-structure on the surface at least partially of described coin Zhang Jicai and cover on described surface micro-structure, described surface micro-structure is any face structure or its combination that can modulate incident light, and the color of light that described coating and described surface micro-structure cooperatively interact to obtain expectation becomes anti-counterfeiting characteristic.
Because the surface micro-structure in coin chapter according to the present invention can be modulated freely to incident light, it is combined the color of light that can realize enriching and becomes feature with coating, so make according to the technological feasibility of the coin chapter of the application strong, and gained coin, commemorative coin, the better visual effect of souvenir badge and stronger anti-counterfeit capability can be realized.
In addition, compared with the flexible parent metal such as banknote, the packing of product, the rigid substrate of coin chapter can ensure that light becomes the uniformity of coating, thus is conducive to maintenance and expression that color of light in the process of circulation becomes feature.
Accompanying drawing explanation
Fig. 1 is the profile of the coin chapter according to one embodiment of the present invention;
The top view figure with the coin chapter of translation rolling light change effect that Fig. 2 (a), 2 (b), 2 (c) are formed as surface micro-structure for employing cylindrical lens structure, stereochemical structure signal and the partial cross section intercepted;
The top view figure with the coin chapter of translation rolling light change effect that Fig. 3 (a), 3 (b), 3 (c) are formed as surface micro-structure for employing spherical mirror structure, stereochemical structure signal and the partial cross section intercepted;
The top view figure with the coin chapter of translation rolling light change effect that Fig. 4 (a), 4 (b), 4 (c) are formed as surface micro-structure for employing zigzag structure, stereochemical structure signal and the partial cross section intercepted;
Fig. 5 gives the schematic diagram utilizing cylindrical mirror to form 2D/3D effect;
Fig. 6 (a), 6 (b), 6 (c) for have the coin chapter of plastic relief sense image effect top view figure, stereochemical structure signal and intercept partial cross section; And
Fig. 7 is the top view figure of the coin chapter with diffuse reflective characteristics.
Detailed description of the invention
Describe in detail according to coin chapter of the present invention below in conjunction with accompanying drawing, to understand thought of the present invention better.Should be appreciated that described accompanying drawing and describe just description of the preferred embodiment of the present invention in detail, not limit the scope of the invention by any way.
As shown in Figure 1, the coating 4 that coin chapter 1 according to the present invention comprises coin Zhang Jicai 2, covers the surface micro-structure 3 on the surface at least partially of described coin Zhang Jicai 2 and cover on described surface micro-structure 3, described surface micro-structure 3 is any face structure or its combination that can modulate incident light, and the color of light that described coating 4 and described surface micro-structure 3 cooperatively interact to obtain expectation becomes anti-counterfeiting characteristic.Although representatively illustrate the upper surface of coin Zhang Jicai 2 in FIG, surface micro-structure 3 can also be formed on the arbitrary surfaces such as the lower surface of described coin Zhang Jicai 2 and sidewall.
Wherein, surface micro-structure 3 is the micro-structural below micro-meter scale and micro-meter scale, and it comprises the micro-structural in more than 2 μm of cycles, also can comprise holographic grating and sub-wavelength grate structure.
Preferably, surface micro-structure 3 can have the arbitrary surfaces micro-structural including but not limited to following characteristics: one or more continuous curve surface type structure, one or more rectangular configuration, one or more sawtooth pattern prism or their splicing or combination.Wherein, described continuous curve surface type structure can be splicing or the combination of one or more structures in microlens structure, sinusoidal pattern structure, oval structure, hyperbolic surface structure, parabolic shape structure etc.Described microlens structure can be refractive lenticule, diffraction type lenticule or their splicing or combination, wherein refractive lenticule can comprise the lenticule based on geometric optics of spherical microlens, ellipsoid lenticule, cylindrical microlenses or other random geometry, and diffraction type lenticule comprises humorous diffraction microlens, planar diffraction lenticule, fresnel's zone plate etc.In addition, the concrete arrangement mode of above structure can be periodic, local period, aperiodicity, randomness or their combination etc.By carrying out suitable design modifying to concrete arrangement mode, and combining with coating 4, just can obtain the optical signature such as innervation, pattern change, 3 D stereo with color change.This incites somebody to action below 2-7 by reference to the accompanying drawings and is described in detail.
The size of described surface micro-structure 3 at least one direction on surface being parallel to coin Zhang Jicai 2 can be 2 μm-500 μm, is preferably 5 μm-100 μm; When this size is less than 2 μm, obvious diffraction phenomena can be there is, present iris, color characteristic and the observing effect of coating 4 can be disturbed.The relief height of surface micro-structure 3 is less than 100 μm, is preferably less than 25 μm.
The mother matrix of described surface micro-structure 3 can be obtained by micro Process modes such as lathe in machining, optical exposure, electron beam exposures, can also realize in conjunction with techniques such as hot melt backflows, make working version by electroforming process, with precise laser cutting apparatus or other accurate cutting apparatus, working version is cut according to the size of mould and shape, the working version cut is placed on base cake, by the mode of mould punching, the surface micro-structure on base cake is replicated on coin chapter.More excellent preparation method is that the surface micro-structure on working version is copied to die surface, and surface micro-structure through Surface hardening treatment, then is replicated on coin chapter with mould punching by mould.
Below the structure of the coating 4 in coin chapter 1 according to the present invention is described.This coating 4 provides interfere type multi-layer film structure, and this interfere type multi-layer film structure forms Fabry-pool sieve resonator, and it has selection index system to the white light of incidence, makes emergent ray only comprise some wave band, thus forms specific color; When incident angle changes, light path on the other side changes, and interferes wave band also to change, thus causes the color of presenting to observer in angle of emergence direction also to change thereupon, thus forms light change effect.Described interfere type multi-layer film structure can be that the light be made up of the reflecting layer of the sequentially overlap on the surface covering described coin Zhang Jicai 2, low refractive index dielectric layer and absorbed layer becomes coating structure; Can also be stack gradually by sequentially overlapping high refractive index medium layer, low refractive index dielectric layer and the high refractive index medium layer that cover on the surface of coin Zhang Jicai 2 coating formed; Can also be stack gradually by the absorbed layer of the sequentially overlap covered on the surface of coin Zhang Jicai 2, high refractive index medium layer and reflecting layer the coating formed.Wherein, the material in reflecting layer can for having the material of high reflectance, as gold, silver, copper, aluminium, zinc, nickel, titanium etc. and their alloy; The material requirements of absorbed layer is the close material of its refractive index and absorptivity, and can be such as semi-metallic (as silicon, germanium etc.), also can be metal material or its alloy (as chromium, copper, nickel, nichrome etc.); The refractive index of low refractive index dielectric layer is less than or equal to 1.7, such as, can be magnesium fluoride, silica, ice crystal etc.
Preferably, when the material forming described surface micro-structure 3 on coin Zhang Jicai 2 can provide the effect in reflecting layer, described coating 4 can omit reflecting layer.This simplification can Simplified flowsheet to a certain extent, and eliminate between reflecting layer and coin Zhang Jicai 2 in conjunction with this factor of firmness, be conducive to coin Zhang Liutong.
When preparing according to coin chapter 1 of the present invention, coating 4 can pass through the methods such as the physics of thermal evaporation, electron beam evaporation, magnetron sputtering or chemical vapour deposition (CVD) and obtain, and preferably produce the effect that similar shape covers, i.e. the surface topography similar shape of its pattern and surface micro-structure 3.
The general principle of the coin chapter 1 that surface micro-structure according to the present invention is modulated is as follows: the differential primitive choosing the described surface micro-structure 3 according to coin chapter 1 of the present invention.For arbitrary incident field, owing to there is reflection in the interface of differential primitive, so when this incident field is by reflecting (α) during surface micro-structure 3, thus generation reflection light field, this reflection light field is by obtaining the Line Integral of the reverberation (α) from above-mentioned differential primitive on the surface of described surface micro-structure 3; Meanwhile, owing to covering the existence of the coating 4 on surface micro-structure 3, because coating 4 has the effect such as selective absorbing, reflection, so reflection light field is the reverberation with particular color formed by coating 4 selective reflecting.
Although above-mentioned described physical principle is correct understanding and the description of the physical phenomenon produced for coin chapter involved in the present invention thought at present, do not mean coin chapter according to the present invention limit by the current described physical principle for explaining this phenomenon.The anti-counterfeiting characteristic of described coin chapter 1 is determined by the basic structure of this coin chapter 1 and detailed description of the invention.
Below in conjunction with Fig. 2-7, the antifalse effect of coin chapter according to the present invention is described.
Fig. 2 (a), 2 (b), 2 (c) respectively illustrate the arrangement of the top top view surface micro-structure 3 from surface micro-structure 3 diagram, according to the perspective view of coin chapter of the present invention and the partial cross section figure of intercepting, wherein zones of different defines the cylindrical microlenses structure of different directions arrangement, and described cylindrical microlenses width is 30 microns, the cycle is 32 microns, be highly 8 microns.Coating 4 is structure C r/SiO
2the color changeable coating of/Al, its each layer thickness is respectively 5nm/430nm/60nm, wherein Al layer directly contacts with described surface micro-structure 3, and the color characteristic of this color changeable coating is realize front with the change of viewing angle to observe the transformation of carmetta to oblique view green.The effect that this example structure realizes is: top view above surface micro-structure 3, and with the change of viewing angle, whole region can produce the effect of the pattern translation rolling changed with color and light and shade.
Fig. 3 and Fig. 4 sets forth and realize the adoptable other two kinds of surface micro-structures 3 of rolling effect and exemplarily give arrangement mode.
Fig. 3 (a), 3 (b), 3 (c) are respectively and adopt spherical microlens to form the partial cross section figure of the top view figure of surface micro-structure 3, perspective view and intercepting to obtain pattern translation rolling effect.
Fig. 4 (a), 4 (b), 4 (c) are respectively and adopt sawtooth pattern prism to form the partial cross section figure of the top view figure of surface micro-structure 3, perspective view and intercepting to obtain pattern translation rolling effect.
Fig. 5 schematically illustrates and utilizes cylindrical lens form surface micro-structure 3 and form the method for 2D/3D effect.Four image-regions that shape is " KINE " are as shown in Fig. 5 (a), (b), (c), (d), their differences in the position of transverse direction are d, be filled with the different cylindrical microlenses structure in azimuth (lenticule parameter is with Fig. 2 center pillar lens parameter) respectively, described azimuthal change is gradual change.After the region mode of carrying out as Fig. 5 (e), (f), (g), (h) in Fig. 5 (a), (b), (c), (d) is split, synthesize according to the mode of Fig. 5 (i), thus determine the final form of surface micro-structure 3.The surface micro-structure 3 formed according to the method by change at top view in the process of visual angle obtain with color and light and shade change and there is the 2D/3D feature of depth of field sense and certain dynamic effect.
Image format by change Fig. 5 (a), (b), (c), (d) obtains different effects, such as, they are defined as respectively " K ", " I ", " N ", " E " four image-regions, so will observer's top view are made to change in the process of visual angle the switching effect obtained between multiple image.Again such as, they are defined as respectively the different images under the different angles of true stereo object or model, then can by it being mated with azimuthal relation of cylindrical microlenses, thus observer be made to obtain real third dimension in the process of top view change visual angle.
Fig. 6 (a), 6 (b), 6 (c) are respectively the partial cross section figure of top view figure when adopting cylindrical microlenses to form surface micro-structure 3, perspective view and intercepting.Black region wherein in Fig. 6 (a), 6 (b) schematically represents post lens, and pattern and the arrangement mode of selected post lens are schematically provided by Fig. 6 (c).The effect that this example structure realizes is: above surface micro-structure 3 during top view, with the change of viewing angle, and whole region can produce the image effect having plastic relief sense with color and light and shade change.
Fig. 7 is the top view figure adopting cylindrical microlenses to form surface micro-structure 3.The relative randomization in post lens arrangement direction in figure in zones of different.Arbitrary surfaces micro-structural mentioned above can certainly be adopted.The effect that this embodiment realizes is: above surface micro-structure 3 during top view, with the change of viewing angle, and whole region can produce the diffuse reflective characteristics with granular sensation, flickering with color and light and shade change.Preferably, when described surface micro-structure 3 is made up of the randomized post lens of orientation to form diffuse effect, can by changing the degree of random distribution and concrete form to form more feature, as three-dimensional in diffuse reflection rolling, diffuse reflection etc. include but not limited to above feature.
Be to be understood that, in above embodiment, for obtaining corresponding visual effect, described surface micro-structure 3 can adopt the structure being not limited to above-mentioned embodiment and specifically specifying, and other can also be adopted can to carry out the plane modulated or curved face type surface micro-structure and their combination by coating 4 of covering of effects on surface.
Preferably, coin chapter according to the present invention can also comprise the ups and downs macroscopic relief between surface micro-structure 3 and coin Zhang Jicai 2, for providing pattern or character features, surface micro-structure 3 covers on macroscopic relief, is jointly realized by the mould punching technique of coin chapter with macroscopic relief.Although surface micro-structure 3 can provide visual relief features itself by specific design, there is not the sense of touch of the ups and downs embossment of real macroscopic view.
Preferably, in order to increase the service life according to coin chapter of the present invention, can on the coating 4 of described coin chapter 1 armor coated (not shown).Such as can apply UV curing materials on the surface of coating 4 as protective layer, then utilize UV light source to carry out protective layer irradiating the protective layer forming solidification.Described protective layer should at least local be translucent, thus ensures that color of light becomes feature and do not affect by it.Described protective layer only can protect surface, such as a upper surface of coin chapter, also can protect the multiple of coin chapter or all surfaces.Described protective layer also can such as be obtained by methods such as printing, evaporation, sputterings.
Preferably, the pattern of described protective layer is identical with the macro surface pattern of described coating 4, thus ensures the sense of touch of coin chapter.
Preferably, the overlay area of coating 4 can also form pattern, and wherein said pattern can be macroscopic pattern, micro-word, meticulous lines etc., thus can realize better antifalse effect.
In addition, coin chapter according to the present invention can also comprise be positioned at described coin Zhang Jicai 2 surface, described coating 4 surface on functional layer (not shown), this functional layer has diffraction light change feature, micro-nano structure feature, printed patterns feature, partially metallised feature, fluorescent characteristics and for one or more features in machine-readable magnetic, optical, electrical, radiation characteristics.
Below some preferred embodiment of the present invention is only exemplarily described.But it will be understood by those skilled in the art that under the prerequisite not departing from design of the present invention and spirit, various equivalents or amendment can be made to the present invention, and the technical scheme so obtained also should belong to protection scope of the present invention.
Claims (14)
1. a coin chapter, the coating that this coin chapter comprises coin Zhang Jicai, covers the surface micro-structure on the surface at least partially of described coin Zhang Jicai and cover on described surface micro-structure, described surface micro-structure is any face structure or its combination that can modulate incident light, and the color of light that described coating and described surface micro-structure cooperatively interact to obtain expectation becomes anti-counterfeiting characteristic.
2. coin chapter according to claim 1, wherein, described surface micro-structure is of a size of 2 μm-500 μm at least one direction on described surface being parallel to described coin Zhang Jicai.
3. coin chapter according to claim 1, wherein, described surface micro-structure is of a size of 5 μm-100 μm at least one direction on described surface being parallel to described coin Zhang Jicai.
4. coin chapter according to claim 1, wherein, the relief height of described surface micro-structure is less than 100 μm.
5. coin chapter according to claim 1, wherein, the relief height of described surface micro-structure is less than 25 μm.
6. coin chapter according to claim 1, wherein, described surface micro-structure is continuous curve surface type structure, rectangular configuration, sawtooth pattern prism structure and/or their splicing or combination.
7. coin chapter according to claim 6, wherein, described continuous curve surface type structure is splicing or the combination of one or more structures in microlens structure, sinusoidal pattern structure, oval structure, hyperbolic surface structure, parabolic shape structure.
8. coin chapter according to claim 7, wherein, described microlens structure is refractive lenticule, diffraction type lenticule or their splicing or combination.
9. coin chapter according to claim 1, wherein, described coating is interfere type multi-layer film structure, and this interfere type multi-layer film structure forms Fabry-pool sieve resonator.
10. coin chapter according to claim 9, wherein, described interfere type multi-layer film structure comprise in following structure any one:
Stack gradually by absorbed layer, low refractive index dielectric layer and reflecting layer the coating formed, wherein this reflecting layer contacts with the surface of described surface micro-structure;
The coating formed is stacked gradually by high refractive index medium layer, low refractive index dielectric layer and high refractive index medium layer; And
Stack gradually by absorbed layer, high refractive index medium layer and reflecting layer the coating formed, wherein this reflecting layer contacts with the surface of described surface micro-structure.
11. coin chapters any one of claim 1 to 8 described in claim, wherein, described surface micro-structure self has reflection function, and described coating is any one or its combination in following coating:
Stack gradually by absorbed layer and low refractive index dielectric layer the coating formed, wherein this low refractive index dielectric layer contacts with the surface of described surface micro-structure; And
Stack gradually by absorbed layer and high refractive index medium layer the coating formed, wherein, this high refractive index medium layer contacts with the surface of described surface micro-structure.
12. coin chapters any one of claim 1 to 8 described in claim, wherein, are also formed with ups and downs macroscopic relief, for providing pattern and/or character features between described coin Zhang Jicai and described surface micro-structure.
13. coin chapters any one of claim 1 to 8 described in claim, wherein, the surface of described coating are coated with protective layer.
14. coin chapters any one of claim 1 to 8 described in claim, wherein, the surface of described coin Zhang Jicai and/or the surface of described coating have diffraction light change feature, interference light become feature, micro-nano structure feature, print characteristics, partially metallised feature and for one or more features in machine-readable magnetic, optical, electrical, radiation characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247083.XA CN104223620A (en) | 2013-06-20 | 2013-06-20 | Coin medal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247083.XA CN104223620A (en) | 2013-06-20 | 2013-06-20 | Coin medal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104223620A true CN104223620A (en) | 2014-12-24 |
Family
ID=52213215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310247083.XA Pending CN104223620A (en) | 2013-06-20 | 2013-06-20 | Coin medal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104223620A (en) |
Cited By (3)
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| CN104575255A (en) * | 2015-01-19 | 2015-04-29 | 深圳市深大极光科技有限公司 | Anti-counterfeiting film |
| CN114815399A (en) * | 2021-01-28 | 2022-07-29 | 瀚宇彩晶股份有限公司 | Display device |
| WO2022166894A1 (en) * | 2021-02-03 | 2022-08-11 | 中钞特种防伪科技有限公司 | Anti-counterfeiting element |
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