CN205416817U - Anti -fake component of optics and use anti -fake product of optics of anti -fake component of this optics - Google Patents
Anti -fake component of optics and use anti -fake product of optics of anti -fake component of this optics Download PDFInfo
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Abstract
The utility model relates to an optics field of guarding against falsification discloses the anti -fake component of an optics and has used the anti -fake product of optics of the anti -fake component of this optics, and the anti -fake component of optics includes: substrate, this substrate include mutual opposite first surface and second surface, be located the synthetic layer of sampling on the first surface of substrate, and be located little image layer on the second surface of substrate, a little image layer includes first region and second area, first region covers some at least inside the country has cladding material, the second area contains two at least subregions, and covers some at least have the colour functional layer in every subregion, and colour functional layer and first region cladding material inside the country in each subregion have colour characteristics different separately, in addition little image layer can by thereby sample in the synthetic layer of sampling and synthetic form images. It has easy discernment and difficult bogus characteristics.
Description
Technical field
The present invention relates to optical anti-counterfeiting field, particularly relate to a kind of optical anti-counterfeit element and use the optical anti-counterfeiting product of this optical anti-counterfeit element.
Background technology
In order to prevent the forgery utilizing scanning and the means such as duplicating to produce, all kinds of high safety such as banknote, card and product packaging or high added value leaflet are widely used Techniques of Optical Security, and achieve extraordinary effect.
The patent documentations such as CN101563640, CN101443692, CN101120139, CN101346244, US5712731, US0034082, US4765656, US4892336, CN1271106, CN1552589 disclose same class on two surfaces of base material, is respectively provided with microlens array and the Security element of micro-picture and text array, wherein, micro-picture and text array is positioned near the focal plane of microlens array, is reproduced More's amplification of micro-picture and text array by microlens array and has certain depth of field or present the pattern of dynamic effect.
For ensure pattern that More amplifies under the conditions of different environment light sources the most readily identified, micro-picture and text array and its background need the contrast of enough colors or brightness, i.e. need to colour micro-picture and text array.Owing to required micro-picture and text structure is very fine (the most several micron), and the limit printing pen of general printing technology is drawn in more than 20 microns, and therefore general printing technology cannot meet the requirement of this fineness.
The method having two class colorings at present in document.One class method is as disclosed in the patent documentations such as CN1906547A: form the depression of certain depth at micro-image-text area, utilizes doctor blade process to be filled to depression by coloured material, and the excess stock outside micro-image-text area is struck off substantially.For realizing preferably coloring, this method is to the line thickness of micro-picture and text and cup depth, and the two matching relationship has bigger restriction.
Another kind of way is to utilize micro-nano structure, as patent documentation US20030179364 discloses the micro-picture and text coloring utilizing the optical absorption structure of big depth-to-width ratio to realize black, patent documentation US20100307705A1 discloses the coloring utilizing the metal Nano structure of nano-particle filling or stepped ramp type to realize micro-picture and text.
Both the above color method at different aspect existing defects: structure disclosed in US20030179364 can not realize the coloring of colorization；The plane coverage mode of described structure is difficult to realize aborning by stepped ramp type structure and coating that US20100307705A1 utilizes.
Summary of the invention
It is an object of the invention to provide a kind of optical anti-counterfeit element and use the optical anti-counterfeiting product of this optical anti-counterfeit element, it has the feature of easy to identify and difficult forgery.
The present invention provides a kind of optical anti-counterfeit element, and this optical anti-counterfeit element includes: base material, and this base material includes mutually contradictory first surface and second surface；The sampling synthesis layer being positioned on the first surface of described base material；And the micro-image layer being positioned on the second surface of described base material, this micro-image layer includes first area and second area, described first area is at least partly coated with coating, described second area comprises at least two subregion, every sub regions is at least partly coated with color functional layer, color functional layer in each sub regions and the coating in first area have the most different color characteristics, and described micro-image layer can be sampled by described sampling synthesis layer and synthesize thus form image.
The present invention also provides for a kind of optical anti-counterfeiting product using above-mentioned optical anti-counterfeit element.
Optical anti-counterfeit element and optical anti-counterfeiting product according to the present invention have the advantage that
(1) it is to be collectively forming by the coating and multiple color functional layer with different colours feature due to micro-image layer, so this micro-image layer will have the information of multiple color, so that the image after sampling synthesis has many color characteristics, and solve the problem that this type of product colour is single；
(2) can arbitrarily define due to the color characteristic of coating and multiple color functional layer, thus determine the strong contrast that the image after sampling synthesis has between color；
(3) can echo mutually with the image of sampling synthesis due to many color characteristics of the image of sampling synthesis, therefore define the optical security features of novelty, it is readily identified, and can produce higher public's captivation and higher anti-forgery ability；
(4) equipment generally in the art can be utilized to produce in batches according to the optical anti-counterfeit element of the present invention, technological feasibility is strong.
Accompanying drawing explanation
Fig. 1 a is the profile of the optical anti-counterfeit element according to one embodiment of the present invention；
Fig. 1 b is the schematic diagram of the arrangement mode of sample synthesis layer and micro-image layer of the optical anti-counterfeit element according to one embodiment of the present invention；
Fig. 1 c and Fig. 1 d is the optical signature schematic diagram of the optical anti-counterfeit element according to one embodiment of the present invention；
Fig. 2 is the schematic diagram of a kind of making step of the coating in micro-image layer of the optical anti-counterfeit element according to one embodiment of the present invention；
Fig. 3 is the schematic diagram of another making step of the coating in micro-image layer of the optical anti-counterfeit element according to one embodiment of the present invention；
Fig. 4 is the schematic diagram of the step making the color functional layer in second area on the basis of making step shown in Fig. 3 further；
Fig. 5 is the schematic diagram of the embodiment of the part beneficial effect that the optical anti-counterfeit element according to the present invention can bring；And
Fig. 6 is the generalized section of the optical anti-counterfeit element forming reflecting layer on sampling synthesis layer according to one embodiment of the present invention.
Detailed description of the invention
Describe the optical anti-counterfeit element according to the present invention in detail below in conjunction with accompanying drawing and use the optical anti-counterfeiting product of this optical anti-counterfeit element.Should be appreciated that described accompanying drawing and describe simply description of the preferred embodiment of the present invention in detail, limiting the scope of the invention the most by any way.Further, it will be appreciated by those skilled in the art that the gray scale in all accompanying drawings and dimension scale are only schematically, do not represent color and the dimension scale of reality.
As shown in Figure 1a, base material 2, sampling synthesis layer 21 and micro-image layer 22 are included according to the optical anti-counterfeit element of one embodiment of the present invention.Base material 2 includes mutually contradictory first surface 31 and second surface 32.Sampling synthesis layer 21 is positioned on the first surface 31 of base material 2.Micro-image layer 22 is positioned on the second surface 32 of base material 2, this micro-image layer 22 includes first area and second area, described first area is at least partly coated with coating 221, described second area comprises at least two subregion, every sub regions is at least partly coated with color functional layer and (shows two sub regions the most in fig 1 a, the two subregion is covered each by color functional layer 222 and color functional layer 223), color functional layer (222 in each sub regions, 223) coating 221 and in first area has the most different color characteristics, and described micro-image layer 22 can be sampled by described sampling synthesis layer 21 and synthesize thus form image.That is, the coating 221 in first area, the color functional layer 222,223 in second area together form micro-image layer 22.
Have as a example by two sub regions by the second area shown in Fig. 1 a, one specific embodiment of the optical anti-counterfeit element according to the present invention can be: sampling synthesis layer 22 have employed the spherical microlens of 21 μ m diameter, the rectangular arrangement of arrangement (as shown in Fig. 1 b (a)) of this microlens array, arrangement cycle are 23 microns, lenticule height is 7 μm, and the thickness of base material 2 is 20 μm.Coating 221 is the metal Al layer that 40nm is thick, and color functional layer 222,223 is respectively red and green nano ink.Shown in top view such as Fig. 1 b (b) of micro-image layer 22 that coating 221, color functional layer 222,223 are formed, wherein, Al coating 221 defines the background (i.e. first area) of micro-image layer 22, red color functional layer 222 and green color functional layer 223 compartmentalization ground form the stroke (second area) of micro-image layer 22, and the arrangement cycle of " B " the micro-pattern matrix formed is consistent with the arrangement cycle of the microlens array in sampling synthesis layer 22, but the array of micro-pattern matrix and microlens array orientation has the difference of 0.3 degree.Based on configuration as above, the optical signature as shown in Fig. 1 c (situation of oblique optical Security element) and Fig. 1 d (situation of rotary optical Security element) will be formed, namely, when tilting or rotating this optical anti-counterfeit element, human eye is by it is observed that the image " B " of sampling synthesis can form the behavioral characteristics of colour, i.e. image background presents the silvery white of metal Al, the stroke part of " B " then has two kinds of colors, particularly when the word of sampling synthesis is during the subregion at red color functional layer 222 place moves to the subregion at green color functional layer 223 place, the color of word " B " will become green from redness.
It is above combining the embodiment shown in Fig. 1 b and Fig. 1 c and sampling synthesis layer 21, micro-image layer 22, coating 221, color functional layer 222,223 and the anti-counterfeiting characteristic that obtained have been carried out exemplary description, it is true that have the most preferably and assembled scheme according to each several part of the optical anti-counterfeit element of the present invention.Hereinafter will be described in more detail.
According in a preferred embodiment of the present invention, sampling synthesis layer 21 can be formed by least one in microwell array, micro-grid array, microlens array and other micro-sampling tool that micro-image layer 22 can carry out imaging.Wherein, microwell array, micro-grid array and microlens array can be aperiodic array, randomness array, cyclic array, local period array or their combination in any being made up of multiple micropore unit, micro-grid cell and lenticule unit respectively.Lenticule unit can be refractive lenticule, diffraction type lenticule or combinations thereof, wherein refractive lenticule can choose lenticule based on geometric optics or their combination in any of sphere, parabola, ellipsoid lenticule, cylindrical microlenses, polygon or other random geometry, and diffraction type lenticule can choose humorous diffraction microlens, planar diffraction lenticule, Fresnel zone plate.Wherein, except Fresnel off-chip, other lenticular concrete form can be chosen as continuous curve surface type or notch cuttype lens as lenticule unit.
Preferably, described microwell array, micro-grid array and microlens array can be to present at least one arrangement mode in square arrangement, rectangular arranged, hexagonal array and other tetragon or polygonal arrangement mode.It addition, other arrangement modes, such as circular arrangement mode, oval shaped arrangements mode are also feasible.Such as, Fig. 1 b (a) schematically illustrates the rectangular arrangement of arrangement of microlens array, and Fig. 1 b (b) schematically illustrates cyclic array during letter " B " that micro-image layer 22 is rectangular arranged being made up of in the optical anti-counterfeit element shown in Fig. 1 a coating 221, color functional layer 222 and color functional layer 223.
Preferably, micro-image layer 22 can be based on sampling synthesis layer 21 and the effect of required realization and the aperiodic array being made up of multiple micro-elementary areas, randomness array, cyclic array, local period array or their combination in any that define, thus ensures that sampling synthesis layer 21 can carry out sampling synthesis thus forms image micro-image layer 22.Such as, as a example by sampling synthesis layer 21 is micro-lens arrays layer, then the arrangement cycle of microlens array is preferably identical with the arrangement cycle of the micro-pattern matrix in micro-image layer 22.It addition, the array between described microlens array with described micro-pattern matrix is preferably placed at-0.3 relative to alternate angle and spends in the range of 0.3 degree.The characteristics of image formed can be sink, float, dynamic, scale, rotate, multichannel conversion, the assemblage characteristic of one or more effect of the continuous depth of field change figure, 3-D graphic, continuous multiple frames animation etc., specifically refer to " microlens array Display Technique research " (micro-nano electronic technology the 6th phase in 2003, page 29), and " micro lens array Display Technique research " (the 11st national electron beam ion beam photon beam Annual Conference, calendar year 2001 10 monthly magazine, page 226) etc. document.It is true that optical anti-counterfeit element of the present invention can provide the most novel and abundant optical security features such as such as optical security features shown in Fig. 1 c and 1d.
Preferably, according to the periodicity in the optical anti-counterfeit element of the present invention or local period sample the cycle of images of synthesis layer 21 and micro-image layer 22 can be 10 μm to 200 μm, preferably 15 μm are to 50 μm；The focal length of sampling synthesis layer (such as micro-lens arrays layer) 21 can be 10 μm to 200 μm, preferably 15 μm are to 40 μm；The working depth of sampling synthesis layer (such as micro-lens arrays layer) 21 is preferably smaller than 15 μm, and more preferably 0.5 μm is to 10 μm.It addition, the difference of the focal length of the thickness of base material 2 and sampling synthesis layer 21 is preferably less than 8 μm, the most described difference is less than 3 μm.
Preferably, sampling synthesis layer 21 can be obtained by the micro-nano technology mode such as optical exposure, electron beam exposure, it is also possible to combines the techniques such as hot melt backflow and realizes, carries out batch duplicating by processing modes such as ultraviolet casting, mold pressing, nano impressions.
Preferably, can be single-layer metal coating, multiple layer metal coating, single-layer medium layer, multilayer dielectricity layer, interference-type multi-layer film structure etc. according to the coating 221 in the optical anti-counterfeit element of the present invention.Color functional layer 222 and 223 can be at least one in ink, pigment, dyestuff, photochromatic printing ink, liquid crystal light change layer, co-extrusion light change film, single-layer metal coating, multiple layer metal coating, single-layer medium layer, multilayer dielectricity layer, interference-type multi-layer film structure etc..Coating 221 has the most different color characteristics from color functional layer 222 and 223, thus the function to realize colored micro-image layer 22 that presents a contrast.Wherein, interference-type multi-layer film structure can be any one or its combination in any in following three class interference-type multilayer coatings: by absorbed layer (such as, can be semi-transparent metal layer), low refractive index dielectric layer and reflecting layer stack gradually the interference-type multi-layer film structure (being briefly described as " absorbed layer/low refractive index dielectric layer/reflecting layer " structure) of formation, wherein absorbed layer contacts with second surface 32；The interference-type multi-layer film structure formed is stacked gradually by high refractive index medium layer, low refractive index dielectric layer and high refractive index medium layer；And by absorbed layer (such as, can be semi-transparent metal layer), high refractive index medium layer and reflecting layer stack gradually the interference-type multi-layer film structure (being briefly described as " absorbed layer/high refractive index medium layer/reflecting layer " structure) of formation, wherein, absorbed layer contacts with second surface 32.According to the embodiment of the present invention, for the refractive index high refractive index medium layer more than or equal to 1.7, its material can be ZnS, TiN, TiO2、TiO、Ti2O3、Ti3O5、Ta2O5、Nb2O5、CeO2、Bi2O3、Cr2O3、Fe2O3、HfO2, ZnO etc., the refractive index low refractive index dielectric less than 1.7 can be MgF2、SiO2Deng；The material in the coat of metal or reflecting layer can be the metals such as Al, Cu, Ni, Cr, Ag, Fe, Sn, Au, Pt or its mixture and alloy；The material of semi-transparent metal layer (or absorbed layer) can be the metals such as Al, Cr, Ni, Cu, Co, Ti, V, W, Sn, Si, Ge or its mixture and alloy.It addition, in embodiments of the present invention, high index of refraction can refer to the refractive index in the range of 1.7-3, and low-refraction can refer to the refractive index less than 1.7.
Above-mentioned interference-type multi-layer film structure can form Fabry-Perot cavity filter, and it has selection to incident white light so that emergent ray only comprises 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 presenting to observer to change the most therewith, thus forms optically variable effect.
When at least one in coating 221, color functional layer 222,223 is at least one in single-layer metal coating, multiple layer metal coating, single-layer medium layer, multilayer dielectricity layer, interference-type multi-layer film structure, it can be formed by the method physically and/or chemically deposited, such as, include but not limited to the means such as thermal evaporation, magnetron sputtering, MOCVD, molecular beam epitaxy.
Although it should be noted that, the second area shown in Fig. 1 a has two sub regions.But, actually, the second area of micro-image layer 22 can comprise the subregion of more than 2, and each sub regions can have different color characteristics, the color characteristic of the color characteristic of these subregions with coating 221 is combined so that micro-image layer 22 and sampling composograph have coloured characteristics of image.
The method preparing the optical anti-counterfeit element according to the present invention it is illustratively described below in conjunction with Fig. 2.The method forming coating 221 is referred to Chinese patent CN104647936A, the most exemplarily only provides two of which preparation method.Should be appreciated that described method is only the specific description of the embodiment to optical anti-counterfeit element of the present invention, limit the scope of the present invention the most by any way.
Preparation method shown in Fig. 2 is to prepare the optical anti-counterfeit element shown in Fig. 1 a as target.First, the first surface 31 of base material 2 prepares the one-dimensional sub-wavelength grate structure of sinusoidal pattern 41 on preparation sampling synthesis layer 21 second area on the second surface 32 of base material 2, the cycle of this optical grating construction is 245nm, the degree of depth is 150nm, and the first area on second surface 32 is flat site.Then, on the second surface 32 of base material 2, Direct precipitation thickness is the Al layer of 60nm (with the thickness on first area as reference), then on Al layer, deposit thickness is the Si of 50nm (with the thickness on first area as reference), then total is placed in NaOH solution (temperature 40 DEG C, concentration 5%) soak 18 seconds, the Si layer and the Al layer that are then formed on second area are wholly absent in succession, the Al layer formed on first area yet suffers from, thus defines coating 221.In this scenario, the sub-wavelength grate structure 41 that second area uses has higher structure depth-to-width ratio, therefore the surface area on its unit apparent area is much larger than first area, thus ensure that when similar shape covers ground depositing Al layer or Si layer under the conditions of same deposition, the deposit thickness of second area is thinner, thus when the Si layer on second area is completely dissolved by NaOH solution, form Si layer on the first region to be completely dissolved not yet, in next stage, when the Al layer on second area is completely dissolved by NaOH solution, Si layer on first area yet suffers from and the Al layer that covered it plays the effect protecteding from NaOH solution corrosion.Thus it is formed accurately required coating 221 such that it is able to form the image background of micro-image layer 22 of optical anti-counterfeit element shown in Fig. 1 a.
Preferably, above-mentioned sub-wave length grating 41 can be obtained by the micro-nano technology mode such as optical exposure, electron beam exposure, carries out batch duplicating by processing modes such as ultraviolet casting, mold pressing, nano impressions.
Fig. 3 shows another method preparing the optical anti-counterfeit element shown in Fig. 1 a.First, preparing the structure of second area opposing first regions epirelief on the second surface 32 of base material 2, second area relatively first area exceeds 1.5 μm, simultaneously preparation sampling synthesis layer 21 on the first surface 31 of base material 2.Then, on second surface 32, Direct precipitation thickness is the Al layer 51 of 60nm (with the thickness on first area as reference), then on Al layer, coating thickness is the polyester material 52 of 1.5 μm, then total is placed in NaOH solution (temperature 40 DEG C, concentration 5%) soak 30 seconds, the polyester material and the Al layer that are then formed on second area are wholly absent in succession, and the Al layer that first area is formed yet suffers from, thus defines the coating 221 in Fig. 1 a.In this scenario, due to first area 1.5 μm recessed relative to second area, therefore the Polycarbonate Layer coated due in coating procedure the levelability of material and tend to converge to recessed area, the Polycarbonate Layer making first area is thicker relative to second area, therefore the Al layer surface of second area has the Polycarbonate Layer of relative thin, thus is easier to be corroded when immersing NaOH solution.Thus it is formed accurately required coating 221 such that it is able to form the image background of micro-image layer 22 of optical anti-counterfeit element shown in Fig. 1 a.
Above polyester material 52 as protective layer can for example with general printing, be coated with or the means such as deposition realize, and can essentially have more material preferred version, it can the opaquest, the translucent or coating of all-transparent.Preferably, protective layer is polymer, especially comprises the polymer of cellulose.Such as, the polymer forming protective layer can include NC Nitroncellulose (preferably nitroalcohol) and the mixture of the resin (such as Radix Acaciae senegalis and Colophonium) etc. of the resistance to subsequent treatment in order to improve protective layer added.In a kind of preferred version, main resin is the resin material of polyester, and described resin material comprises following components: the main resin of (1) about 20wt%-about 30wt%, and described resin is the polyester that hydroxyl value is more than 120, described polyester is collateralization hydroxyl polyester, and viscosity is 25000 ± 5000mPa.s；(2) NC Nitroncellulose of about 10wt%-about 25wt%, described NC Nitroncellulose is nitrogen content < the low nitrogen nitrocellulose of 12.4%；(3) cross-linking agent of about 5wt%-about 25wt%, described cross-linking agent is isocyanate oligomers；And the solvent of (4) about 20wt%-about 60wt%.
Be illustratively described the color functional layer 222 and the method for color functional layer 223 prepared in optical anti-counterfeit element shown in Fig. 1 a below in conjunction with Fig. 4, this making step is the continuity of the method having made sampling synthesis layer 21 and coating 221 shown in Fig. 3.In order to make it easy to understand, last step shown in Fig. 4 in Fig. 3.After having made sampling synthesis layer 21 and coating 221, the coating 221 formed using multicolor group printing mantle print red and Preen nono ink on the second surface 32 of base material 2, thickness is 2 μm, thus forms two regions 61,62 respectively.Shown in Fig. 4, two regions directly connect, naturally it is also possible to adjust two regions according to technological level or design needs so that it intersects or separates.Now, red and green nano ink not only covers the first area in micro-image layer 22 as color functional layer 222 and 223, but also covers the second area in micro-image layer 22.Then; total is immersed in solvent; the selection of this solvent depends on the selection of the protective layer that Merlon is main resin; when the auxiliary agent of this protective layer is chosen as fat-soluble or alcohol-soluble material, correspondingly solvent is chosen as lipid (such as ethyl acetate) or alcohols (such as isopropanol).Use alcohol-soluble material as the auxiliary agent of described protective layer in the present embodiment; solvent is chosen as isopropanol; during soaking; the part of the first area that described red nano ink and Preen nono ink cover; i.e. cover at coating 221 (Al layer) partially due to the isopropanol that is dipped into corrodes to protective layer so that the related nano ink insoluble in isopropanol is peeled off jointly after protective layer dissolves.Finally, color functional layer 222 and 223 the most only covers two sub regions of second area, and only has coating 221 in first area, the most i.e. completes the preparation of optical anti-counterfeit element shown in Fig. 1 a.
Although it should be noted that the color functional layer in first area is removed in the preparation process shown in Fig. 4, but, it practice, the color functional layer in first area can also be removed according to the needs of design.
Such as use ZnS, Al when coating 2212O3、MgF2、SiO2, the transparent or semitransparent material such as cryolite time, if the color functional layer do not removed in first area, so in final optical anti-counterfeit element, observe, by making human eye pass through sampling synthesis layer 21, the color that the color functional layer that first area is covered provides jointly by coating 221 and its surface, if designer does not admit this color, then the step shown in Fig. 4 can be utilized the color functional layer covered in the first region to be removed.If designer admits this color, so can not also remove the color functional layer in first area, even if because the color functional layer do not removed in described first area, due to the existence of coating 221, it is still able to the difference so that having on color characteristic between first area and all subregion of second area.
The most such as, if coating 221 uses the opaque coating such as Al, Cu, so the color functional layer of coating on first area will be played the effect blocked by it, make the color functional layer in first area have no effect on the sampling building-up process of sampling synthesis layer 21, now can also select the color functional layer not removing in first area.
Owing to have employed previously described structure according to the optical anti-counterfeit element of the present invention, therefore it will be provided with multiple abundant and interesting useful optical security features so that the optical anti-counterfeit element of the present invention has higher anti-forgery ability, more easily popular identification.Below with reference to Fig. 5, the useful optical anti-counterfeiting effect that the optical anti-counterfeit element according to the present invention is capable of is described.
Fig. 5 gives an embodiment of the optical anti-counterfeit element according to the present invention, it has 71～75 5 regions altogether, Fig. 5 (a) gives the top view of this optical anti-counterfeit element, figure has schematically marked the relation of each several part, each region all uses the spherical microlens of rectangular arranged as sampling synthesis layer 21, lenticular a diameter of 25 μm, and the arrangement cycle of microlens array is 27 μm, lenticular height is 10.2 μm, and the thickness of base material 2 is 19 μm.And:
Micro-image layer content in region 71 is word " A ", and its arrangement cycle is 27 μm, and the array between its with microlens array is+0.4 degree relative to alternate angle；
Micro-image layer content in region 72 is word " B ", and its arrangement cycle is 27 μm, and the array between its with microlens array is-0.3 degree relative to alternate angle；
Micro-image layer content in region 73 is word " B ", and its arrangement cycle is 27 μm, and the array between its with microlens array is+0.3 degree relative to alternate angle；
Micro-image layer in region 74 is consistent with the content in region 73 and arrangement mode；
Micro-image layer content in region 75 is word " C " and " D ", its arrangement is as amplified shown in signal district 751, it is divided into 752 and 753 two parts by area equalization accordingly in each lenticular underface, wherein 752 parts are for placing the array containing word " D ", and 753 parts are for placing the array containing word " C ".In the present embodiment, word " D " all uses the cycle to be 27 μm and be+0.3 arrangement spent with the relative alternate angle between microlens array with " C " array, and two above array is combined in micro-image layer 22 in region 75 in the way of splitting and mutually interting by region 752 and 753.
Simultaneously, the Al that micro-image layer 22 in region 71～75 uses thickness to be 60nm is as coating 221, and using coating 221 as micro-image layer content word or the background of image, in fact, the color functional layer in coating 221 and each region can be the arbitrary portion of pattern in micro-image layer, can also be word or image itself, it is also possible to be a part for image or its background, the "/" stroke part of such as word " A ".
Region 71 use red nano ink as the color functional layer (not shown) of this subregion in second area, i.e. the stroke part of word " A " in region 71；
Region 72 use green metal ink as the color functional layer (not shown) of this subregion in second area, i.e. the stroke part of word " B " in region 72；
Region 73 use photochromatic printing ink (such as purchase and be viewed as carmetta from the front of Sicpa company, oblique view is green OVI ink) as the color functional layer (not shown) of this subregion in second area, i.e. the stroke part of word " B " in region 73；
(front is viewed as gold to use liquid crystal light to become material in region 74, oblique view is that green cholesteryl liquid crystal light becomes material) as the color functional layer (not shown) of this subregion in second area, i.e. the stroke part of word " B " in region 74；
Region 75 uses Cr/SiO2The light that/Al (4nm/360nm/50nm) forms becomes coating as the color functional layer (not shown) of this subregion in second area, i.e. word " C " and the stroke part of " D " in region 75, described light becomes the color characteristic of coating and becomes blue (inclination) into green (front), and Cr layer is in the second surface side of base material 2.
Fig. 5 (b) and (c) give the optical signature of the optical anti-counterfeit element formed according to configuration as above, when rotating, translate or during oblique optical Security element, colour or the light that will present change direction mutually orthogonal (or vertical) direction along sight line in region 71～75 become the movement of pattern or switch phenomenon.Specifically, such as along during rotating shaft 81 rotary sample, in 71～75 each regions word will occur sampling composograph that the colour shown in Fig. 5 (b) or light becomes along the mobile phenomenon of arrow direction, wherein:
In region 71, the word " A " of white background redness stroke moves up；
In region 72, the word " B " of white background green stroke moves down；
In region 73, the word " B " of white background carmetta stroke moves up, and along with the increase of the anglec of rotation, carmine strokes of characters becomes green；
Therefore, when region 72 Green word " B " moves to the intersection in region 72 and 73, carmetta word " B " in region 73 also moves to this intersection, produce " burying in oblivion " feature of similar two words " B ", and during " burying in oblivion ", the carmetta word in region 73 will be changed to the green identical with word in region 72.
In region 74, white background gold word " B " moves up, and along with the increase of the anglec of rotation, golden strokes of characters becomes green；
Therefore, when the word in region 73 is while region 72 and 73 intersection occurs " burying in oblivion " feature, in region 74, the golden word " B " intersection to region 73 and 74 moves, and this moving process is Tong Bu with the word " B " in region 73.After in region 74, word " B " arrives the intersection in region 73 and 74, word " B " in region 73 will appear in this intersection, thus the part of the actual disappearance of word " B " in " completion " region 74, so that human eye is experienced the word " B " in region 74 and crossed the boundary of 73 and 74, and its color change is carmetta.Simultaneously, during the anglec of rotation persistently increases, word " B " in region 74 and region 73 all will become green so that the color (golden and carmetta) of the dynamic word that above-mentioned human eye is experienced and color change (gold is changed to carmetta) process change the most suddenly (all changing into green).
In region 75, white background green word " C " moves up, and along with the increase of the anglec of rotation, green strokes of characters becomes blue, and word will switch to the word " D " moved up simultaneously.
Above example does not only give the implementation method of several concrete useful optical security features.The strong coupling simultaneously also demonstrating the interregional optical texture using coating 221 and different colours functional layer 222,223 and the strong coupling of the optical signature brought further.
In embodiment illustrated in fig. 5, the micro-image layer in 71～75 each regions is the pattern arrangement that array period is identical with the array period of microlens array, in fact the array period selecting the two can be needed different according to design.Preferably, described array between-2 degree to+2 degree, thus can determine the dynamic amplitude of described sampling composograph relative to alternate angle.
In Fig. 5, the handoff features of " C " and " D " two patterns in region 75 can also be referred to as " dual pathways " feature, in fact, the area below by lenticule unit can be needed to be divided into two or more parts according to design, for filling different micro-image informations, thus realize the switching of multiple pattern i.e. " multi-channel feature ".Can be relevant between selected multiple patterns, such as present certain image amplification, translate, some frame patterns in the effect such as scaling, it is also possible to be one group of animation or multiframe film.
According in the another preferred implementation of the present invention, as shown in Figure 6, optical anti-counterfeit element according to the present invention can also include the reflecting layer 9 being positioned on the surface of sampling synthesis layer 21, so that the direction of observation of human eye is in second surface 32 side of base material 2, that is, the image content of sampling synthesis layer 21 is reflexed in human eye after micro-image layer 22 carries out sampling synthesis by sampling synthesis layer 21 by reflecting layer 9.Refer to Chinese patent CN104118236 about the sampling synthesis structure of optical anti-counterfeit element of layer 21, the manufacture method with reflecting layer 9, its content is all referred in this patent.
It addition, when using configuration shown in Fig. 6, at least one in color functional layer 222 and 223 and coating 221 is the most translucent or transparent, so that light can be through micro-image layer 22 and project in human eye.
According in the another preferred implementation of the present invention, can also include being formed in base material 2 according to the optical anti-counterfeit element of the present invention, diffraction light change feature at least one on the first surface 31 of base material 2, on the second surface 32 of base material 2, in described first area, in described second area, in sampling synthesis layer 21, on the surface of micro-image layer 22, interfere light to become feature, micro-nano structure feature, print characteristics, partially metallised feature and one or more features in machine-readable magnetic, optical, electrical, radiation characteristics.For example, it is possible to add fluorescent material (not shown) in the optical anti-counterfeit element of the present invention, so that it is with fluorescent characteristics.This fluorescent material can form phosphor pattern by such as mode of printing.Such as, the liquid crystal light change material as color functional layer is replaced with fluorescent material, phosphor pattern will be realized and disclosure satisfy that the condition of sampling synthesis, thus form sampling synthesis phosphor pattern.
Additionally, base material 2 can be at least local transparent, it is also possible to be coloured dielectric layer.In a kind of preferred version, described base material 2 can be one layer of single transparent dielectric film, such as PET film, PVC film etc., naturally it is also possible to be the surface transparent dielectric film with functional coating (such as embossed layer), it is also possible to be the multilayer film through being composited.
Optical anti-counterfeit element according to the present invention is particularly suitable for being fabricated to opened window safety line.The thickness of described safety line is not more than 50 μm.Cheque paper with described opened window safety line is used for the false proof of all kinds of high safety products such as banknote, passport, marketable securities.
Optical anti-counterfeit element according to the present invention also is used as label, mark, wide bar, transparent window, overlay film etc., can be sticked on various article by various bonding mechanisms.Such as transfer on banknote, the contour safety product of the credit card and high value added product.
Another aspect of the present invention provides the product with described optical anti-counterfeit element, and described product includes but not limited to all kinds of high safety products and the high value added products such as banknote, the credit card, passport, marketable securities, and each wrapping paper, packing box etc..
Below the certain preferred embodiments of the present invention are exemplarily only described.But, the present invention is not limited to the detail in above-mentioned embodiment, in the technology concept of the present invention, technical scheme can be carried out multiple simple variant, and these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, in the case of reconcilable, can be combined by any suitable means.In order to avoid unnecessary repetition, various possible compound modes are illustrated by the present invention the most separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (20)
1. an optical anti-counterfeit element, it is characterised in that this optical anti-counterfeit element includes:
Base material, this base material includes mutually contradictory first surface and second surface；
The sampling synthesis layer being positioned on the first surface of described base material；And
The micro-image layer being positioned on the second surface of described base material, this micro-image layer includes first area and second area, described first area is at least partly coated with coating, described second area comprises at least two subregion, every sub regions is at least partly coated with color functional layer, color functional layer in each sub regions and the coating in first area have the most different color characteristics, and described micro-image layer can be sampled by described sampling synthesis layer and synthesize thus form image.
Optical anti-counterfeit element the most according to claim 1, it is characterised in that described sampling synthesis layer is formed by least one in microwell array, micro-grid array and microlens array.
Optical anti-counterfeit element the most according to claim 2, it is characterized in that, described microwell array, micro-grid array and microlens array be made up of multiple micropore unit, micro-grid cell and lenticule unit respectively cyclic array, aperiodic array, randomness array, any one or a combination thereof in local period array.
Optical anti-counterfeit element the most according to claim 3, it is characterized in that, described microwell array, micro-grid array and microlens array present at least one arrangement mode in square arrangement, rectangular arranged, hexagonal array, circular arrangement, oval shaped arrangements and other tetragon or polygonal arrangement mode.
Optical anti-counterfeit element the most according to claim 1, it is characterised in that the cycle of images of described sampling synthesis layer and described micro-image layer is that 10 μm are to 200 μm.
Optical anti-counterfeit element the most according to claim 1, it is characterised in that the cycle of images of described sampling synthesis layer and described micro-image layer is that 15 μm are to 50 μm.
Optical anti-counterfeit element the most according to claim 1, it is characterised in that the focal length of described sampling synthesis layer is that 10 μm are to 200 μm.
Optical anti-counterfeit element the most according to claim 1, it is characterised in that the focal length of described sampling synthesis layer is that 15 μm are to 40 μm.
Optical anti-counterfeit element the most according to claim 1, it is characterised in that the working depth of described sampling synthesis layer is less than 15 μm.
Optical anti-counterfeit element the most according to claim 9, it is characterised in that described working depth is that 0.5 μm is to 10 μm.
11. optical anti-counterfeit elements according to claim 1, it is characterised in that the thickness of described base material is less than 8 μm with the difference of the focal length of described sampling synthesis layer.
12. optical anti-counterfeit elements according to claim 1, it is characterised in that the thickness of described base material is less than 3 μm with the difference of the focal length of described sampling synthesis layer.
13. optical anti-counterfeit elements according to claim 3, it is characterized in that, array period between described microwell array, micro-grid array and the array period of microlens array and described micro-image layer is identical or different, and array is positioned at-2 relative to alternate angle and spends in the range of 2 degree.
14. optical anti-counterfeit elements according to claim 1, it is characterised in that described coating or color functional layer are positioned at the pattern in described micro-image layer, patterned background or in the two in the part of any one.
15. according to the optical anti-counterfeit element described in any claim in claim 1 to 14, it is characterized in that, this optical anti-counterfeit element also includes covering the color functional layer that the color characteristic with the color functional layer in each sub regions on described coating is identical or different.
16. optical anti-counterfeit elements according to claim 1, it is characterised in that described coating is at least one in single-layer metal coating, multiple layer metal coating, single-layer medium layer, multilayer dielectricity layer, interference-type multi-layer film structure.
17. according to the optical anti-counterfeit element described in any claim in claim 1 to 14, it is characterized in that, described color functional layer is at least one in ink, pigment, dyestuff and photochromatic printing ink, liquid crystal light change layer, single-layer metal coating, multiple layer metal coating, single-layer medium layer, multilayer dielectricity layer, interference-type multi-layer film structure.
18. according to the optical anti-counterfeit element described in any claim in claim 1 to 14, it is characterized in that, this optical anti-counterfeit element also includes the reflecting layer being positioned on described sampling synthesis layer surface, and the color functional layer in each described subregion and at least one in the coating in described first area are translucent or transparent.
19. according to the optical anti-counterfeit element described in any claim in claim 1 to 14, it is characterized in that, this optical anti-counterfeit element also includes being formed in described base material, on the first surface of described base material, on the second surface of described base material, in described first area, in described second area, in described sampling synthesis layer, the diffraction light change feature at least one on the surface of described micro-image layer, light is interfered to become feature, micro-nano structure feature, print characteristics, partially metallised feature and for machine-readable magnetic, light, electricity, one or more features in radiation characteristics.
20. 1 kinds of optical anti-counterfeiting products, it is characterised in that this optical anti-counterfeiting product uses according to the optical anti-counterfeit element described in claim any one of claim 1 to 19.
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| AU2022296846B2 (en) * | 2021-06-23 | 2025-01-30 | Hueck Folien Gesellschaft M.B.H. | Securing element with a substrate and at least one micro-image assembly |
| US12325253B2 (en) | 2021-06-23 | 2025-06-10 | Hueck Folien Gesellschaft M.B.H. | Securing element with a substrate and at least one micro-image assembly |
| CN116118382A (en) * | 2021-11-15 | 2023-05-16 | 中钞特种防伪科技有限公司 | Security element and security product |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 |