CN102179966A - Anti-counterfeiting element and anti-counterfeiting product - Google Patents
Anti-counterfeiting element and anti-counterfeiting product Download PDFInfo
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- CN102179966A CN102179966A CN2011100221867A CN201110022186A CN102179966A CN 102179966 A CN102179966 A CN 102179966A CN 2011100221867 A CN2011100221867 A CN 2011100221867A CN 201110022186 A CN201110022186 A CN 201110022186A CN 102179966 A CN102179966 A CN 102179966A
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Abstract
The invention discloses an anti-counterfeiting element and an anti-counterfeiting product. The anti-counterfeiting element comprises a dark background layer, and a liquid crystal layer and a base layer which are positioned above the dark background layer, wherein the base layer is made of a multi-layer optical film with the characteristic of changing a color with an angle; and the liquid crystal layer is a first cholesteric liquid crystal layer made of a cholesteric liquid crystal film or a nematic liquid crystal layer made of a nematic liquid crystal film material. The anti-counterfeiting product comprises an article which is provided with the anti-counterfeiting element provided by the embodiment of the invention, wherein the anti-counterfeiting element is combined with the article in the form of a film, a label, a strip, a transparent window and a windowing safety line. By the embodiment of the invention, the anti-counterfeiting property of the anti-counterfeiting element can be improved, and the safety of the anti-counterfeiting product is increased.
Description
Technical field
The present invention relates to anti-counterfeiting technology, especially a kind of Security element and anti-fake product.
Background technology
Along with the develop rapidly of color photocopying technology, imaging technique with popularize, make valuables, for example: marketable securities, best brand of product etc., the phenomenon of being palmed off and forging is more and more general.In order to prevent that valuables from being palmed off, forging, to valuables configuration safety element,, prevent that valuables from being duplicated without permission usually so that the authenticity of these valuables is tested by safety element.
At present, in field of anti-counterfeit technology, developed the multiple anti-fraud functional safety element that has.For example: the safety element that adopts a line anti-counterfeiting technology or popular anti-counterfeiting technology to develop, the general population directly by modes such as perusal or simple touches, promptly can discern this safety element.Utilize the optically-variable technology, can effectively discern valuables are palmed off, forged by forgery modes such as duplicating, scannings.Because the imaging system that adopts in light change technology record is the scattered light information that is replicated the product surface, therefore, can't copy counterfeit by forgery modes such as duplicating, scannings with light change effect, and, the light argument part that utilizes light to become fabrication techniques one-tenth has with angle variable color feature, be easy to be discerned, help to stop the propagation of counterfeit from the field of circulation by masses.Optically variable element is the safety element that adopts a line anti-counterfeiting technology; from visual characteristics of human eyes; can show different visual patterns to the observer in different angles; for example: different colors; difference along with viewing angle; the variation of pattern color attracts much attention easily; utilize such anti-counterfeiting characteristic can make things convenient for the observer apace the true and false of valuables to be made judgement; the personal economic interests that protection is popular; and from extensive fields, stop the circulation of forging article, obtained using widely in recent years.
For example: prior art has proposed a kind of optically variable pigments, and as optically variable element, the form by printing ink is applied to the valuables surface.This pigment has a reflecting layer at least, and is positioned at the selectively absorbing layers on surface, reflecting layer and is positioned at the dielectric layer on absorbed layer surface, and the absorbed layer that is positioned at the dielectric layer surface.Optically variable pigments with this composite construction can be added in the printing ink easily, is printed onto the surface of valuables in several ways, shows with the angle color changeable effect.Though having with the light of angle variable color, this optically variable pigments becomes effect, from the reflectance spectrum curve of this optically variable pigments as can be known, and its reverberation wave band broad, reverberation is generally mixed light, excitation is not high, and observed from different perspectives aberration is not obvious, is unfavorable for popular acumen identification.
For another example: prior art has also proposed two kinds of optically-variable technology that realize the latent image pattern by the height relief fabric of gravure lines.A kind of is to make the height of local lines be higher than other zones by predetermined pattern in one group of gravure lines, can't find the similarities and differences between the height lines during top view, and the lines that exceed when oblique view shelter from low lines and form pattern, that is: the pattern variation of growing out of nothing; Another kind is to stay white region according to the lower lines of predetermined pattern printing height between lines and lines, during top view, thereby because the big pattern that forms of pattern area line density, when the side is observed, lines block around the low quilt of pattern area lines, can't observe pattern, that is: pattern is from having to no change.
Yet in realizing process of the present invention, the inventor finds that along with the continuous development and the marketization of optically-variable technology, the forgery means improve gradually, make optically variable element more and more easily in being imitateed, and have reduced its anti-counterfeiting performance.For example: the marketization that holographic optical becomes technology has obtained swift and violent development in recent years, can obtain holographic optical sell of one's property product easily; Along with the manufacturing technology that has with the optically variable pigments of angle color changeable effect is popularized gradually, its cost is also more and more lower, is easy to obtain; In recent years, had with the multi-layer optical film of angle color changeable effect more and more generally, made that the false proof effect with the optically-variable technology of angle variable color had been subjected to challenge in the application aspect gift and the high-grade goods packing.Therefore, adopt the anti-forgery security of the safety element that a line anti-counterfeiting technology or popular anti-counterfeiting technology develop more and more to be challenged, even can mix the spurious with the genuine fully as for forging feature, make the public can't discern the authenticity of the article of its sign, the businessman that produces and sells true article is brought economic loss.
Summary of the invention
Embodiment of the invention technical problem to be solved is: a kind of Security element and anti-fake product are provided, to improve the anti-counterfeiting performance of Security element, increase the security of anti-fake product.
For solving the problems of the technologies described above, a kind of Security element that the embodiment of the invention provides, comprise the dark-background layer, and be positioned at liquid crystal layer and basic unit on the described dark-background layer, described basic unit is made by the multi-layer optical film that has with angle variable color feature, and described liquid crystal layer is first cholesteric liquid crystal layer of being made by cholesteric liquid crystal films or the nematic crystal layer of being made by the nematic crystal thin-film material.
A kind of anti-fake product that the embodiment of the invention provides comprises article, and described article are provided with the Security element that the above embodiment of the present invention provides, and described Security element combines with described article with the form of pad pasting, decals, joint strip, transparency window, opened window safety line.
In the Security element that provides based on the above embodiment of the present invention, on the dark-background layer, be provided with liquid crystal layer and basic unit, liquid crystal layer wherein is cholesteric liquid crystal layer or nematic crystal layer, basic unit is made by the multi-layer optical film that has with angle variable color feature, because multi-layer optical film and liquid crystal layer all have with angle variable color feature, can show different visual patterns to the observer in different angles, be easy to be discerned by masses, can make things convenient for the observer apace the true and false of valuables to be made judgement, help to stop the propagation of counterfeit from the field of circulation; And, after in Security element, multi-layer optical film and liquid crystal layer being set simultaneously, the two is carried out combination with angle variable color feature, can observe the more optical effect of horn of plenty in different angles, embody multiple with the angle color changeable effect, with respect to a line anti-counterfeiting technology of simple dependence multi-layer optical film or liquid crystal layer, promoted the anti-counterfeit capability of valuables to a certain extent; In addition, with respect to the cholesteric liquid crystal film, the cost of multi-layer optical film is lower, thereby greatly reduces the cost of Security element, and in addition, the present invention combines multi-layer optical film with liquid crystal layer, with respect to the safety element with multilayer liquid crystal layer, has simplified production technology.The false proof higher grade of the Security element of the embodiment of the invention, the forgery difficulty is bigger, be easy to popular identification, production technology is simple, manufacturing cost is relatively low.The anti-fake product that the optical anti-counterfeiting element of the embodiment of the invention is combined together to form with the form and the valuables of pad pasting, decals, joint strip, transparency window, opened window safety line, security is higher, thereby can prevent effectively that valuables from being palmed off and forging.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of Security element first embodiment of the present invention;
Fig. 2 is the structural representation of Security element second embodiment of the present invention;
Fig. 3 is the structural representation of Security element the 3rd embodiment of the present invention;
Fig. 4 is the structural representation of Security element the 4th embodiment of the present invention;
Fig. 5 is the structural representation of Security element the 5th embodiment of the present invention;
Fig. 6 is the structural representation of Security element the 6th embodiment of the present invention;
Fig. 7 is the structural representation of Security element the 7th embodiment of the present invention;
Fig. 8 is the structural representation of Security element the 8th embodiment of the present invention;
Fig. 9 is the structural representation of Security element the 9th embodiment of the present invention;
Figure 10 is the structural representation of an embodiment of anti-fake product of the present invention;
Figure 11 is the structural representation of first Application Example of Security element of the present invention;
Figure 12 is the structural representation of second Application Example of Security element of the present invention;
Figure 13 is a display effect schematic diagram embodiment illustrated in fig. 12;
Figure 14 is another display effect schematic diagram embodiment illustrated in fig. 12;
Figure 15 is the structural representation of the 3rd Application Example of Security element of the present invention;
Figure 16 is the structural representation of the 4th Application Example of Security element of the present invention;
Figure 17 is a Figure 16 and a display effect schematic diagram embodiment illustrated in fig. 20;
Figure 18 is the structural representation of the 5th Application Example of Security element of the present invention;
Figure 19 is the structural representation of the 6th Application Example of Security element of the present invention;
Figure 20 is the structural representation of the 7th Application Example of Security element of the present invention;
Figure 21 is another display effect schematic diagram embodiment illustrated in fig. 20;
Figure 22 is the structural representation of the 8th Application Example of Security element of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Except a line anti-counterfeiting technology, also developed expert's anti-counterfeiting technology of utilizing specific apparatus or device that safety element is discerned in the field of anti-counterfeit technology, be also referred to as two wires anti-counterfeiting technology and three-way anti-counterfeiting technology.Because need discern safety element by means of specific apparatus or device, with respect to a line anti-counterfeiting technology, expert's anti-counterfeiting technology has promoted the anti-counterfeit capability of valuables to a certain extent.
Fig. 1 is the structural representation of Security element first embodiment of the present invention.As shown in Figure 1, the Security element of this embodiment comprises dark-background layer 101, for example: and black ink layer, and be positioned at liquid crystal layer 102 and basic unit 103 on this dark-background layer 101.Dark-background layer 101 can provide dark-background for basic unit 103 and/or liquid crystal layer 102.Wherein, basic unit 103 is made by the multi-layer optical film that has with angle variable color feature, and liquid crystal layer 102 can be first cholesteric liquid crystal layer of being made by cholesteric liquid crystal films or the nematic crystal layer of being made by the nematic crystal thin-film material.
No matter be multi-layer optical film or cholesteric liquid crystal films, when placing on the dark-background layer 101, can will absorb with the light of liquid crystal layer 102 through basic unit 103 by dark-background layer 101, thereby multi-layer optical film or cholesteric liquid crystal films are demonstrated preferably with the angle color changeable effect.
Wherein, the making of multi-layer optical film is with two kinds of different thermoplastic transparent resins of refraction index, is made by co-extrusion to the film with rainbow effect through MULTILAYER COMPOSITE.What multi-layer optical film had is that the interference of light principle of utilizing its sandwich construction to produce produces with the angle color changeable effect, light is by thickness during less than the different film of two kinds of refraction indexs of wavelength, can reflection of light and interference appear at each interlayer, so can produce the rainbow effect on the multi-layer optical film surface, thereby be convenient to popular obvious identification, produce antiforge function.In addition, cholesteric liquid crystal films also has with the light of angle variable color and becomes feature, is convenient to popular obvious identification, and the form that it can safety line is used for the false proof of marketable securities.The making of cholesteric liquid crystal films normally is coated on the cholesteryl liquid crystal pre-polymer solution on the plastic basis material, and drying is removed solution, with the liquid crystal molecule orientation, then with ultraviolet light with the liquid crystal molecule crosslinking curing.
Though cholesteric liquid crystal films is except with also having the circular polarization characteristic the color changeable effect of angle, multi-layer optical film is close with the antifalse effect and the cholesteric liquid crystal films of angle variable color, and from the cost angle, multi-layer optical film is far below cholesteric liquid crystal films.Utilize multilayer optical film production optical anti-counterfeiting element of the present invention, the technology that Billy makes cholesteric liquid crystal films and then coating making other coating of the present invention earlier with cholesteric liquid crystal material is simple, and cost reduces greatly.
The Security element that the above embodiment of the present invention provides is provided with liquid crystal layer and basic unit on the dark-background layer, liquid crystal layer wherein is cholesteric liquid crystal layer or nematic crystal layer, basic unit is made by the multi-layer optical film that has with angle variable color feature, because multi-layer optical film and cholesteric liquid crystal layer all have with angle variable color feature, can show different visual patterns to the observer in different angles, be easy to be discerned by masses, can make things convenient for the observer apace the true and false of valuables to be made judgement, help to stop the propagation of counterfeit from the field of circulation; And, after in Security element, multi-layer optical film and cholesteric liquid crystal layer being set simultaneously, the two is carried out combination with angle variable color feature, can observe the more optical effect of horn of plenty in different angles, embody multiple with the angle color changeable effect, with respect to a line anti-counterfeiting technology of simple dependence multi-layer optical film or liquid crystal layer, promoted the anti-counterfeit capability of valuables to a certain extent; In addition, with respect to the cholesteric liquid crystal film, the manufacture craft of multi-layer optical film is simple, and cost is lower, thereby greatly reduces the cost of Security element.The false proof higher grade of the Security element of the embodiment of the invention, the forgery difficulty is bigger, manufacturing cost is relatively low.
According to one embodiment of present invention, the multi-layer optical film electromagnetic wave in a viewing angle reflect visible light wave band at least.First cholesteric liquid crystal layer 201 is the electromagnetic wave in a viewing angle reflect visible light wave band at least, make Security element can show two dimensional surface pattern transform characteristics, make Security element have better popular identification antifalse effect, thereby further promoted the antifalse effect of Security element.According to another preferred embodiment, first cholesteric liquid crystal layer 201 at least can be at the electromagnetic wave in an angle reflection ultraviolet or the near infrared band.As shown in Figure 2, be the structural representation of Security element second embodiment of the present invention.Among this embodiment, liquid crystal layer 102 is specially first cholesteric liquid crystal layer 201.
When the visible light of identical wavelength is reflected with first cholesteric liquid crystal layer 201 in basic unit 103, observe Security element with circular polarizing disk, there is the light and shade contrast between first cholesteric liquid crystal layer, 201 zones and the basic unit as a setting 103, that is: can be observed hiding first cholesteric liquid crystal layer, 201 zones by circular polarizing disk.When the visible light of basic unit 103 and first cholesteric liquid crystal layer 201 reflection different wave lengths, the color of basic unit 103 and first cholesteric liquid crystal layer, 201 overlapping regions is different from other regional color of Security element, can obviously discern by naked eyes.Particularly when basic unit's 103 reflect visible light, first cholesteric liquid crystal layer 201 is at least when the electromagnetic wave of an angle reflection ultraviolet or near infrared band, in the electromagnetic angle of first cholesteric liquid crystal layer, 201 reflection black lights, Security element shows as the color of basic unit 103, in the electromagnetic angle of first cholesteric liquid crystal layer, 201 reflect visible light, Security element shows as first cholesteric liquid crystal layer, 201 reverberation and basic unit's 103 catoptrical overlay colors.If first cholesteric liquid crystal layer 201 is present in the Security element with the form of the figure that is present in the Security element regional area, in the electromagnetic angle of first cholesteric liquid crystal layer, 201 reflect visible light, the Security element regional area shows the figure that is different from other regional background color so; In the electromagnetic angle of first cholesteric liquid crystal layer, 201 reflection black lights, figure disappears, and the Security element general performance is the color of basic unit 103.For example: viewing angle from vertical with the Security element surface when 45 degree that tilt are observed, the color of basic unit 103 is from the redness to the green, form with the figure of regional area is present in the color of first cholesteric liquid crystal layer 201 in the Security element for from the purple to the ultraviolet, so, can be observed the mauve figure by redness and purple stack appearance that exists in the Security element at vertical angle, other regional color is red; And when 45 degree were observed Security element, mauve figure disappeared, and whole element color is green.
According to another embodiment of the invention, when liquid crystal layer 102 is specially nematic crystal layer 202, the thickness of nematic crystal layer 202 makes the polarised light by this nematic crystal layer 202 produce λ/2 phase shifts, wherein, λ is normally incident in the reverberation wavelength of these nematic crystal layer 202 lower surfaces after for following one deck outgoing of nematic crystal layer 202 from Security element from nematic crystal layer 202 below.As shown in Figure 3, when being specially nematic crystal layer 202 for liquid crystal layer 102, the structural representation of Security element the 3rd embodiment of the present invention.Because nematic crystal layer 202 can't be observed by naked eyes for approximate material transparent layer.When observing Security element with linear polarizer, the overlapping region of nematic crystal layer 202 and basic unit 103, there is the light and shade contrast with other zone of basic unit 103, can be observed sightless nematic liquid crystal layer 202 zones that are present in the Security element regional area of naked eyes by polarizer.
Also can there be the whole one deck with Security element in liquid crystal layer 202 in embodiment illustrated in fig. 3, and only exists at the regional area of this layer.
When the Security element of the embodiment of the invention is nematic crystal layer 202 at liquid crystal layer 102, because nematic crystal layer 202 has comprised the hiding optical information that could discern by linear polarizer, with combine with angle variable color feature, further promoted the anti-counterfeit capability of valuables.
Further, again referring to Fig. 3, according to another embodiment of the invention, when liquid crystal layer 102 is nematic crystal layer 202, can also comprise the linear light polymeric material layer 104 that contacts with nematic crystal layer 202 in the Security element, the zones of different of this linear light polymeric material layer 104 is after different directions linear polarized uv exposure orientation, has predetermined separately direction in zones of different, be used for to its contact/molecule that is positioned at its lower floor or last layer nematic crystal layer 202 zones of different carries out the multidomain orientation, makes the molecular orientation difference in the zones of different.Suppose in the instantiation that the structure of Security element is the basic unit 103 of being made by multi-layer optical film, the dark-background layer 101 that is positioned at basic unit's 103 lip-deep linear light polymeric material layers 104, is positioned at the nematic liquid crystal layer 202 on the linear light polymeric material layer 104 and is positioned at basic unit's 103 another sides.This element have based on multi-layer optical film embody with angle variable color feature, embody with nematic liquid crystal layer 202, the hiding positive negative film information that could discern by linear polarizer, as an instantiation, in the embodiment of the invention, can form the positive negative film information of hiding by the following method: at the certain density linear light polymer solution of multi-layer optical film surface coating, remove the solvent in the solution after the drying, form linear light polymeric material layer 104, above linear photopolymerization material layer 104, place the optical mask plate that has required picture and text pattern, linear polarized uv with certain angle shines linear photopolymerization material layer 104, like this, the material molecule of the linear light polymeric material layer 104 that is mapped to by illumination is orientation and solidifying just, remove optical mask plate then, linear polarized uv with other angle shines linear photopolymerization material layer 104 again, the material molecule in the zone that is covered in by photomask when shining for the first time just is orientated, so just formed the anisotropy zone of zones of different selectivity orientation in linear photopolymerization material layer 104.Then at linear photopolymerization material layer 104 surface coating nematic liquid crystal pre-polymer solution, dry removing desolvated, with ultraviolet light with liquid crystal prepolymer crosslinking curing, form nematic liquid crystal layer 202, the liquid crystal molecule with birefringence of zones of different is arranged according to the direction of the linear light polymeric material molecule that is in contact with it in the nematic liquid crystal layer 202, thereby has been written into the positive negative film information of hiding in nematic liquid crystal layer 202.
In the Security element of the above embodiment of the present invention, in the Security element of the above embodiment of the present invention, can also comprise the machine sensible information layer 203 of the coded message that carries that based on anti-counterfeiting characteristic material class number forms and discern by machine-readable mode.As shown in Figure 4, be the structural representation of Security element the 4th embodiment of the present invention.Among this embodiment, machine sensible information layer 203 is positioned on the dark-background layer 101, at this moment, can or be printed on the dark-background layer 101 machine sensible information layer 203 coating, machine sensible information layer 203 can be the regional area that whole one deck of being present in Security element also can only exist only in this layer.In addition, machine sensible information layer 203 also can be positioned under the dark-background layer 101, and machine sensible information layer 203 specifically can be dark at this moment, also can be light color.
Perhaps, in the Security element of the above embodiment of the present invention, dark-background layer 101 specifically can be realized by a dark machine sensible information layer 204, this dark color machine sensible information layer 204 carries that material class number forms and by the coded message that machine-readable mode is discerned, is used to basic unit 103 and/or liquid crystal layer 102 that dark-background is provided based on anti-counterfeiting characteristic.As shown in Figure 5, when dark-background layer 101 is specially dark machine sensible information layer 204, the structural representation of Security element the 5th embodiment of the present invention.Among following each embodiment of the present invention, will be specially dark machine sensible information layer 204 with dark-background layer 101 is that example describes, for comprising the situation of dark-background layer 101 with machine sensible information layer 203 simultaneously in Security element, same being suitable for.
When in Security element, comprising the machine sensible information layer, because the coded message that the machine sensible information layer carries that based on anti-counterfeiting characteristic material class number forms and discern by machine-readable mode, utilize specific apparatus or device coded message to be discerned by machine-readable mode, further with angle variable color feature, hiding optical information combine, further promoted the anti-counterfeit capability of valuables.Particularly, anti-counterfeiting characteristic wherein can comprise holographic characteristic, light become feature, soft magnetism feature, Hard Magnetic feature, fluorescent characteristics, infrared signature, thermic feature, electricity cause feature, press cause in feature, friction characteristic, magnetic and the conductive features any one or multiple.Accordingly, the anti-counterfeiting characteristic material can be comprise in holographic material, fluorescent material, soft magnetic material, retentive material, infrared absorbing material, infrared reflective material, IR fluorescence material, infrared up-conversion material, thermoluminescence material, thermochromic material, piezoluminescence material, piezochromic material, tribo-luminescence material, friction off-color material, electroluminescent material, electrochromic material, magnetic and conductive material, the metamerism material any one or multiple.The coded message of machine sensible information layer carrying is specifically formed by above-mentioned any one or multiple anti-counterfeiting characteristic combination of materials.
Further, in the Security element of the embodiment of the invention, also be provided with second cholesteric liquid crystal layer 105 in the regional area on dark machine sensible information layer 204, this second cholesteric liquid crystal layer 105 has at least the subregion overlapping with basic unit 103, as shown in Figure 6, be the structural representation of Security element the 6th embodiment of the present invention.Among the embodiment shown in Figure 6, second cholesteric liquid crystal layer 105 specifically is arranged on the liquid crystal layer 102.
As an instantiation embodiment illustrated in fig. 6, when liquid crystal layer 102 is specially nematic crystal layer 202, in the Security element structure of the embodiment of the invention, comprise that one deck is present in the nematic crystal layer 202 of Security element regional area at least, one deck is present in second cholesteric liquid crystal layer 105 of Security element regional area at least, and the dark machine sensible information layer 204 that is present in the Security element regional area.The electromagnetic wave of multi-layer optical film in arbitrarily angled reflect visible light wave band, the electromagnetic wave of second cholesteric liquid crystal layer 105 at least one angle reflection ultraviolet band or near infrared band, the thickness of nematic crystal layer 202 makes the polarised light by this nematic crystal layer 202 produce λ/2 phase shifts, wherein, λ is normally incident in the reverberation wavelength of these nematic crystal layer 202 lower surfaces after for following one deck outgoing of nematic crystal layer 202 from Security element from nematic crystal layer 202 below.Like this, when the electromagnetic wave of multi-layer optical film and second cholesteric liquid crystal layer 105 reflection different wave lengths, the color of multi-layer optical film and second cholesteric liquid crystal layer, 105 overlapping regions is the overlay color of the two, the color that is different from other Non-overlapping Domain, and with the variation of viewing angle, the color of overlapping region and Non-overlapping Domain also can be along with variation.For example: multi-layer optical film is at angle difference reflection Red and green visible light vertical with this multi-layer optical film surface and that tilt, second cholesteric liquid crystal layer 105 that exists at the Security element regional area is when reflecting purple and ultraviolet light respectively with these second cholesteric liquid crystal layer, 105 surfaces angles vertical and inclination, for the overlapping region of the multi-layer optical film and second cholesteric liquid crystal layer 105, at the mauve visible light of angle reflection Red vertical and purple stack back appearance with the surface; Because ultraviolet light is invisible, with the visible light of the angle reflection green of surface tilt.If second cholesteric liquid crystal layer 105 that exists at the Security element regional area with literal " with " form embody, so when vertical angle is observed Security element, can see mauve under red background " with " word, when observing Security element at the angle of inclination " with " the word disappearance, the visible light of Security element reflection green.For the multi-layer optical film of Non-overlapping Domain, at vertical the angle of inclination reflection Red and green visible light respectively of reaching with the surface.Can be observed the nematic liquid crystal layer 202 that is present in element part areas by linear polarizer.
As an instantiation embodiment illustrated in fig. 6, when liquid crystal layer 102 is specially first cholesteric liquid crystal layer 201, the Security element of the embodiment of the invention comprises the basic unit 103 that multi-layer optical film is made, the dark machine sensible information layer 204 that be present in first cholesteric liquid crystal layer 201 of Security element regional area at least, is present in second cholesteric liquid crystal layer 105 of Security element regional area and is present in the Security element regional area at least.In the Security element of this embodiment of the invention, multi-layer optical film can be at the electromagnetic wave in the arbitrarily angled reflect visible light wave band, the electromagnetic wave of one deck in first cholesteric liquid crystal layer 201 and second cholesteric liquid crystal layer 105 at least one angle reflection ultraviolet band scope, the electromagnetic wave of another layer at least one angle reflection near infrared band scope.For example: multi-layer optical film is at angle difference reflection Red and green visible light vertical with its surface and that tilt, first cholesteric liquid crystal layer 201 reflects purple and ultraviolet light respectively in vertical and that tilt angle with its surface, second cholesteric liquid crystal layer 105 reflects near-infrared and red light respectively in vertical and that tilt angle with its surface, first cholesteric liquid crystal layer 201 that exists at the Security element regional area with literal " with " form embody, second cholesteric liquid crystal layer 105 that exists at the Security element regional area embodies with the form of literal " humorous ", then when the angle vertical with the Security element surface observed this Security element, can see under red background by red and purple stack show mauve " with " word, when the angle of Security element surface tilt is observed this Security element, can see that " humorous " word red and yellow that the green stack shows is arranged under the green background that multi-layer optical film provides.
In concrete the application, Security element combines with class marketable securities made of paper with the form of opened window safety line, when being used for class marketable securities made of paper false proof, because Security element has dark-background layer 101 or dark machine sensible information layer 204, even dark-background layer 101 or dark machine sensible information layer 204 are embedded in the paper entirely, under reverberation, also can obviously observe the black line of a dark color, thereby the printing that influences papery class marketable securities is attractive in appearance.At this moment, can one deck light color covering layer 106 be set for 204 times at dark-background layer 101 or dark machine sensible information layer, for example: the light covering layer that chalk or silver-colored ink print form, perhaps plate the light covering layer that light metal level forms, eliminate the dark black line that dark-background layer 101 or dark machine sensible information layer 204 bring.As shown in Figure 7, when being specially dark machine sensible information layer 204 for dark-background layer 101, the structural representation of Security element the 7th embodiment of the present invention.In actual applications, light color covering layer 106 can be present in the whole zone of Security element, in addition, light color covering layer 106 also can only be present in the regional area of Security element to form certain literal or pattern, for example: with the characters cut in intaglio literal or the pattern of chalk or silver-colored ink print one-tenth, or, further improve the antifalse effect of anti-fake product with characters cut in intaglio literal or pattern that the metal cladding hollow out becomes.
Further,, on the one deck of the top of Security element, protective layer 107 can be set, be destroyed by foreign object to prevent Security element according to another specific embodiment of the present invention.As shown in Figure 8, be the structural representation of Security element the 8th embodiment of the present invention.
In addition,,, under bottom one deck of Security element, can also be provided with adhesive layer 108, so that Security element is bonded on the false proof valuables of needs according to another specific embodiment of the present invention again referring to Fig. 8.
In concrete the application; can be according to the concrete specific material of selecting protective layer 107 and adhesive layer 108 to use of anti-counterfeiting characteristic material in liquid crystal layer 102 materials and the dark machine sensible information layer 204; guarantee that the material in protective layer 107 and the adhesive layer 108 does not influence the anti-counterfeiting characteristic of liquid crystal layer 102 with dark machine sensible information layer 204; and; can adopt conventional method; for example: coating method is arranged at corresponding aspect in the Security element with protective layer 107 and adhesive layer 108.
In the Security element that the embodiment of the invention provides, basic unit 103 can be positioned under the liquid crystal layer 102, also can be positioned on the liquid crystal layer 102, and in the Security element that the various embodiments described above of the present invention provide, basic unit 103 is positioned under the liquid crystal layer 102.At this moment, as a specific embodiment of the present invention, liquid crystal layer 102 specifically can be by conventional method, for example: modes such as coating, printing, heat transfer, be added in the basic unit 103, and specifically can be present in the form of figure, symbol, literal, bar code in the basic unit 103, figure wherein, symbol, literal, bar code for example: and, humorous, A, 1 etc.Be positioned on the liquid crystal layer 102 for basic unit 103, that is: the situation of liquid crystal layer 102 between basic unit 103 and dark-background layer 101 only needs basic unit in the various embodiments described above of the present invention 103 is got final product with the aspect location swap of liquid crystal layer 102 in Security element.As shown in Figure 9, be the structural representation of Security element the 9th embodiment of the present invention.
A kind of anti-fake product that the embodiment of the invention provides, comprise article 1, these article 1 are provided with the Security element 2 that above-mentioned any one embodiment of the present invention provides, and this Security element 2 specifically can combine with article with the form of pad pasting, decals, joint strip, transparency window, opened window safety line.As shown in figure 10, be the structural representation of an embodiment of anti-fake product of the present invention.
In the anti-fake product embodiment illustrated in fig. 10, article 1 specifically can comprise the false proof valuables of all needs such as security, bill, commodity sign, commodity packaging, documentary evidence and anti-false wittness card, for example: valency license, commodity sign or commodity packaging etc. are arranged.Wherein, security can comprise certificate, check, credit card, identity card, passport, admission ticket etc., and bill can comprise banknote, stock, air ticket etc.
Below in the mode of Application Example, the application of Security element of the present invention is described further.In following each Application Example, specifically use peace lattice (Engelhard) company
Multi-layer optical film is made basic unit 103 as base material.
Figure 11 is the structural representation of first Application Example of Security element of the present invention.As shown in figure 11, in this Application Example, at multi-layer optical film 205 surface locals printing nematic liquid crystal solution, regulate the thickness of nematic liquid crystal solution, so that produce λ/2 phase shifts by the polarised light of this nematic liquid crystal solution, dry, solidify this nematic liquid crystal solution and form nematic liquid crystal layer 202, wherein, be normally incident in the reverberation wavelength of these nematic crystal layer 202 lower surfaces after following one deck outgoing of the nematic crystal layer 202 that forms for nematic liquid crystal solution of λ from nematic crystal layer 202 below.At the dark infrared printing ink of another side regional area printing characters cut in intaglio of multi-layer optical film 205, drying forms dark machine sensible information layer 204.If multi-layer optical film 205 is at angle difference reflection Red and green visible light vertical with these multi-layer optical film 205 surfaces and that tilt, this Security element then detects by an unaided eye, along with viewing angle from vertical to the surface that favours Security element, the color of Security element becomes green from redness.Observe this Security element with linear polarizer, and adjust the direction of polarizer, can be observed the implicit pattern information that nematic liquid crystal layer 202 forms, the rotatory polarization sheet, implicit pattern information disappears.Because dark machine sensible information layer 204 is not covered with the whole layer in the Security element, when using viewed in transmitted light, the dark machine sensible information layer 204 that distributes local light tight, and the local printing opacity of the dark machine sensible information layer 204 that do not distribute can be observed the characters cut in intaglio character pattern.The place of dark machine sensible information layer 204 forms character pattern if distribute, and then observes this Security element at the absorption bands of infrared identifier, can be observed the character pattern of the dark machine sensible information layer 204 of dark infrared printing ink formation.
Figure 12 is the structural representation of second Application Example of Security element of the present invention.As shown in figure 12, in this Application Example, at multi-layer optical film 205 surface locals printing cholesteric liquid crystal solution, drying is solidified, and forms first cholesteric liquid crystal layer 201, and its form with letter " A " embodies.Along with viewing angle from vertical to inclination with the surface of Security element, the reverberation of first cholesteric liquid crystal layer 201 is from the near-infrared to the redness, the reverberation of multi-layer optical film 205 is from the redness to the green.Another side regional area at multi-layer optical film 205 prints dark dual-band infrared printing ink, and drying forms dark machine sensible information layer 204.This Security element then detects by an unaided eye, along with viewing angle from vertical to the surface that favours Security element, the color of Security element changes to multi-layer optical film 205 and first cholesteric liquid crystal layer, 201 overlapping regions from whole redness color is the red and green yellow that superposes and occur, and the green that other zone shows for multi-layer optical film 205.Dark dual-band infrared ink pellet surface coating binder at this Security element, drying forms adhesive layer 108, then Security element 2 is attached to the surface of marketable securities 1, observing Security element 2 perpendicular to the angle on Security element 2 surfaces is red, as shown in figure 13.Viewing angle is changed to the angle that favours Security element 2 surfaces, and under green background, the color of multi-layer optical film 205 and first cholesteric liquid crystal layer, 201 overlapping regions becomes yellow literal A, as shown in figure 14.Observe this Security element 2 at the absorption bands of infrared identifier, can be observed the image-forming information of dark dual-band infrared printing ink, that is: owing to divide the character pattern that is covered with dark machine sensible information layer 204 formation, observe this Security element 2 at the reflected waveband of infrared identifier, do not have the image-forming information of dark dual-band infrared ink lay.
In the embodiment shown in fig. 12, if along with viewing angle from vertical to inclination with the surface of Security element, the reverberation of first cholesteric liquid crystal layer 201 is from the redness to the green, the reverberation of multi-layer optical film basic unit 201 is from the near-infrared to the redness.This Security element 2 then detects by an unaided eye, along with viewing angle from vertical to the surface that favours Security element 2, the yellow that the color of multi-layer optical film 205 and first cholesteric liquid crystal layer, 201 overlapping regions occurs to red and green stack from redness, because dark machine sensible information layer 204 is not covered with the whole layer in the Security element, when using viewed in transmitted light, the local light tight of dark machine sensible information layer 204 distributes, and the local printing opacity of the dark machine sensible information layer 204 that do not distribute, the place of dark machine sensible information layer 204 does not form character pattern if distribute, and then can observe the character pattern with hollow out effect.Observe this Security element 2 at the absorption bands of infrared identifier, can be observed the image-forming information of dark dual-band infrared printing ink, observe this Security element 2, do not have the image-forming information of dark dual-band infrared ink lay at the reflected waveband of infrared identifier.
Figure 15 is the structural representation of the 3rd Application Example of Security element of the present invention.As shown in figure 15, in this Application Example, surface hollow-out with the multi-layer optical film 205 of aluminizing, formation is present in the reflecting layer 206 of Security element regional area pattern, regional area printing nematic liquid crystal solution at openwork part not, regulate the thickness of nematic liquid crystal solution, so that produce λ/2 phase shifts by the polarised light of this nematic liquid crystal solution, dry, solidify this nematic liquid crystal solution and form nematic liquid crystal layer 202, wherein, λ is the polarization light wavelength that Security element is reflected on the direction perpendicular to this Security element surface.Another side regional area at multi-layer optical film 205 prints dark magnetic ink, drying, the dark machine sensible information layer 204 of formation magnetic code.If multi-layer optical film 205 is at angle difference reflection green and blue visible light vertical with these multi-layer optical film 205 surfaces and that tilt, then with the naked eye perpendicular to this Security element of surface observation of Security element, can see the characters cut in intaglio image that forms behind the surface hollow-out of the multi-layer optical film 205 of aluminizing, multi-layer optical film 205 openwork parts of aluminizing are the green that multi-layer optical film 205 presents, viewing angle is changed to the position that tilts with the Security element surface, and multi-layer optical film 205 openwork parts of aluminizing become blueness by green.Observe this Security element with linear polarizer, adjust the direction of polarizer, can be observed the pattern that nematic liquid crystal layer 202 embodies, the rotatory polarization sheet, the pattern that nematic liquid crystal layer 202 embodies disappears.Can detect the magnetic code of dark machine sensible information layer 204 in the Security element with the magnetic tester.
Figure 16 is the structural representation of the 4th Application Example of Security element of the present invention.As shown in figure 16, in this Application Example, at multi-layer optical film 205 surface locals printings cholesteric liquid crystal solution, drying is solidified, and forms first cholesteric liquid crystal layer 201 that is present in the Security element regional area, its with literal " with " form embody.As shown in figure 17, along with viewing angle from vertical to inclination with the surface of Security element, the reverberation of first cholesteric liquid crystal layer 201 is from the purple to the ultraviolet, the reverberation of multi-layer optical film 205 is from the redness to the green.At the another side regional area process black printing ink of multi-layer optical film 205, drying forms black ink layer 207.At black ink layer 207 surface locals zone chromatography Hard Magnetic and soft magnetism printing ink, form the machine sensible information layer 203 of soft or hard magnetic then.At machine sensible information layer 203 surperficial coating binder, drying forms adhesive layer 108 then.This Security element then detects by an unaided eye, when viewing angle is surperficial perpendicular to Security element, can see under the red background of multi-layer optical film 205 performances, the color of multi-layer optical film 205 and first cholesteric liquid crystal layer, 201 overlapping regions be show after the stack of infrared and purple mauve " with " word, when viewing angle and Security element surface tilt, mauve " with " the word disappearance, multi-layer optical film 205 colors become green.Can be observed the characters cut in intaglio literal that forms with the black ink printing simultaneously.In addition, can detect the soft or hard magnetic code of dark machine sensible information layer 203 in the Security element with the magnetic tester.
Figure 18 is the structural representation of the 5th Application Example of Security element of the present invention.As shown in figure 18, this Application Example on basis embodiment illustrated in fig. 11, below dark machine sensible information layer 204 chromatography light covering layer 106, be coated with adhesive layer 108 at last.The Security element of this Application Example copied with the form of opened window safety line be put in the bank-note paper, Security element has corresponding anti-counterfeiting characteristic, and, because Security element has light covering layer 108, almost do not observe safety line burying face entirely under the reverberation, can only under transmitted light, see the existence of safety line.
Figure 19 is the structural representation of the 6th Application Example of Security element of the present invention.As shown in figure 19, in this Application Example, at multi-layer optical film 205 surface locals printing cholesteric liquid crystal solution, drying is solidified under inert gas environment, forms second cholesteric liquid crystal layer 105, and its form with letter " A " embodies.Nematic liquid crystal solution is printed in the part on second cholesteric liquid crystal layer 105 then, regulate the thickness of nematic liquid crystal solution, so that produce λ/2 phase shifts by the polarised light of this nematic liquid crystal solution, dry, solidify to form nematic liquid crystal layer 202, wherein, be normally incident in the reverberation wavelength of these nematic crystal layer 202 lower surfaces after following one deck outgoing of the nematic crystal layer 202 that forms for nematic liquid crystal solution of λ from nematic crystal layer 202 below.Along with viewing angle from vertical to inclination with the surface of Security element, the reverberation of cholesteric liquid crystal layer 204 is from the near-infrared to the redness, the reverberation of multi-layer optical film 205 is from the green to the blueness.Another side regional area at multi-layer optical film 205 prints dark fluorescent ink, and drying forms dark machine sensible information layer 204.When viewing angle is surperficial perpendicular to Security element, can see green in multi-layer optical film 205 performances, when viewing angle and Security element surface tilt, can see under the blue background that multi-layer optical film 205 shows that the color of multi-layer optical film 205 and second cholesteric liquid crystal layer, 105 overlapping regions is mauve " A " word that shows after infrared and the purple stack.Observe element with linear polarizer, adjust the direction of polarizer, can be observed the pattern that 202 printing of nematic liquid crystal layer form, the rotatory polarization sheet, pattern disappears.Observe element under uviol lamp, the phosphor pattern that can be observed dark machine sensible information layer 204 sends red light.Because the anti-counterfeiting characteristic material in the dark machine sensible information layer 204 is a fluorescent material, this material is invisible under natural daylight, is subjected to exciting just sending red light under ultraviolet light, and removing restores to the original state again behind the ultraviolet light becomes invisible.
Figure 20 is the structural representation of the 7th Application Example of Security element of the present invention.As shown in figure 20, in this Application Example, at multi-layer optical film 205 surface locals printing cholesteric liquid crystal solution, drying is solidified, and forms first cholesteric liquid crystal layer 201, and its form with literal " humorous " embodies.Part on first cholesteric liquid crystal layer 201 printing cholesteric liquid crystal solution then, drying is solidified, and forms second cholesteric liquid crystal layer 105, its with literal " with " form embody.Along with viewing angle from vertical to inclination with the surface of Security element, the reverberation of first cholesteric liquid crystal layer 201 is from the near-infrared to the redness, the reverberation of second cholesteric liquid crystal layer 105 is from the purple to the ultraviolet, the reverberation of multi-layer optical film 205 is from the redness to the green.Another side regional area at multi-layer optical film 205 prints dark electrically conductive ink, and drying forms the dark machine sensible information layer 204 that conduction is encoded.This Security element detects by an unaided eye, when viewing angle is surperficial perpendicular to Security element, can see under the red background that multi-layer optical film 205 shows second cholesteric liquid crystal layer 105 and multi-layer optical film 205 overlapping regions be mauve " with " word, as shown in figure 17.When viewing angle and Security element surface tilt, can see that first cholesteric liquid crystal layer 201 is yellow " humorous " word with multi-layer optical film 205 overlapping regions under the green background that multi-layer optical film 205 shows, as shown in figure 21.Simultaneously, because dark machine sensible information layer 204 is not covered with the whole layer in the Security element, when using viewed in transmitted light, the local light tight of dark machine sensible information layer 204 distributes, and the local printing opacity of the dark machine sensible information layer 204 that do not distribute, the place of dark machine sensible information layer 204 forms character pattern if distribute, and then naked eyes can be observed owing to divide the character pattern of the approximate hollow out effect that is covered with dark machine sensible information layer 204 formation.In addition, can be with dark machine sensible information layer 204 in the conductivity detection instrument test Security element, detect the conduction coding and whether exist, thereby differentiate the true and false of Security element.
Figure 22 is the structural representation of the 8th Application Example of Security element of the present invention.As shown in figure 22, in this Application Example, at the linear photopolymer solution of multi-layer optical film 205 surface coatings, dry to remove the solvent in the solution, above coating, place the optical mask plate that has required picture and text pattern, linear polarized uv with certain angle shines linear photopolymer coating, removes optical mask plate then and shines linear photopolymer coating with the linear polarized uv of other angle again, forms linear light polymeric material layer 104.At linear photopolymerization material layer 104 surface coating nematic liquid crystal pre-polymer solution, dry removing desolvated, and with liquid crystal prepolymer crosslinking curing, forms nematic liquid crystal layer 202 with ultraviolet light then.Change printing ink on the another side regional area printing dark color of multi-layer optical film 205 is infrared, forms the characters cut in intaglio literal, drying forms dark machine sensible information layer 204.If multi-layer optical film 205 is reflecting yellow with green visible light respectively with this multi-layer optical film 205 surfaces angle vertical and that tilt, this Security element detects by an unaided eye, along with viewing angle from vertical to the surface that favours Security element, the color of Security element becomes green from yellow.Observe this Security element with linear polarizer, and adjust the direction of polarizer, can be observed the hiding positive negative film pattern-information that nematic liquid crystal layer 202 forms, the rotatory polarization sheet, positive negative film exchanges, and the light and shade zone that hides positive negative pattern exchanges.In addition, because dark machine sensible information layer 204 is not covered with the whole layer in the Security element, when using viewed in transmitted light, the local light tight of dark machine sensible information layer 204 distributes, and the local printing opacity of the dark machine sensible information layer 204 that do not distribute, place as if the dark machine sensible information layer 204 that distributes forms character pattern, and then naked eyes can be observed owing to divide the character pattern of the approximate hollow out effect that is covered with dark machine sensible information layer 204 formation simultaneously.Excite dark machine sensible information layer 204 with laser instrument, can be observed green exciting light.Because the anti-counterfeiting characteristic material in the dark machine sensible information layer 204 is a fluorescent material, this material is invisible under natural daylight, is subjected to exciting just sending green light under laser, and removing restores to the original state again behind the laser becomes invisible.
Each embodiment all adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that same or analogous part cross-references gets final product between each embodiment.
The Security element of the embodiment of the invention is incorporated into one with a line with both image change characteristics, the two wires machine-readable anti-false feature of angle variable color feature, a line, has false proof grade height, forges that difficulty is big, the characteristics of low cost of manufacture.The optical anti-counterfeiting element of the embodiment of the invention with after valuables combine, can effectively be realized false proof to valuables with forms such as pad pasting, decals, joint strip, transparency windows.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (14)
1. Security element, it is characterized in that, comprise the dark-background layer, and be positioned at liquid crystal layer and basic unit on the described dark-background layer, described basic unit is made by the multi-layer optical film that has with angle variable color feature, and described liquid crystal layer is first cholesteric liquid crystal layer of being made by cholesteric liquid crystal films or the nematic crystal layer of being made by the nematic crystal thin-film material.
2. Security element according to claim 1 is characterized in that, described multi-layer optical film is the electromagnetic wave in a viewing angle reflect visible light wave band at least.
3. Security element according to claim 2 is characterized in that, described first cholesteric liquid crystal layer is the electromagnetic wave in a viewing angle reflect visible light wave band at least.
4. Security element according to claim 2, it is characterized in that, the thickness of described nematic crystal layer makes the polarised light by this nematic crystal layer produce λ/2 phase shifts, and wherein, λ is the reverberation wavelength that is normally incident in described nematic crystal layer lower surface.
5. Security element according to claim 4 is characterized in that, also comprises the linear light polymeric material layer that contacts with described nematic crystal layer, is used for the molecule in the described nematic crystal layer zones of different is carried out the multidomain orientation.
6. Security element according to claim 1, it is characterized in that, described dark-background layer is specially the machine sensible information layer of the coded message that carries that based on anti-counterfeiting characteristic material class number forms and discern by machine-readable mode, described machine sensible information layer is dark, is used to basic unit and/or liquid crystal layer that dark-background is provided.
7. Security element according to claim 1 is characterized in that, also comprises the machine sensible information layer of the coded message that carries that based on anti-counterfeiting characteristic material class number forms and discern by machine-readable mode.
8. according to claim 6 or 7 described Security elements, it is characterized in that, described anti-counterfeiting characteristic material comprise in holographic material, fluorescent material, soft magnetic material, retentive material, infrared absorbing material, infrared reflective material, IR fluorescence material, infrared up-conversion material, thermoluminescence material, thermochromic material, piezoluminescence material, piezochromic material, tribo-luminescence material, friction off-color material, electroluminescent material, electrochromic material, magnetic and conductive material, the metamerism material any one or multiple.
9. Security element according to claim 1 is characterized in that, also is provided with second cholesteric liquid crystal layer in the regional area on the described dark-background layer.
10. Security element according to claim 9, it is characterized in that, when described liquid crystal layer is first cholesteric liquid crystal layer, the electromagnetic wave of described multi-layer optical film in arbitrarily angled reflect visible light wave band, the electromagnetic wave of one deck in described first cholesteric liquid crystal layer and described second cholesteric liquid crystal layer at least one angle reflection ultraviolet band, the electromagnetic wave of another layer in described first cholesteric liquid crystal layer and described second cholesteric liquid crystal layer at least one angle reflection near infrared band.
11. Security element according to claim 9, it is characterized in that, when described liquid crystal layer is the nematic crystal layer, the electromagnetic wave of described multi-layer optical film in arbitrarily angled reflect visible light wave band, the electromagnetic wave of described second cholesteric liquid crystal layer at least one angle reflection ultraviolet band or near infrared band, the thickness of described nematic crystal layer makes the polarised light by this nematic crystal layer produce λ/2 phase shifts, wherein, λ is the reverberation wavelength that is normally incident in described nematic crystal layer lower surface.
12., it is characterized in that according to any described Security element of claim 1 to 11, also comprise the adhesive layer that is positioned at bottom one deck, be used for described Security element is sticked in other article.
13. anti-fake product, comprise article, it is characterized in that described article are provided with any described Security element of claim 1 to 12, described Security element combines with described article with the form of pad pasting, decals, joint strip, transparency window, opened window safety line.
14. anti-fake product according to claim 13 is characterized in that, described article comprise security, bill, commodity sign, commodity packaging, documentary evidence and anti-false wittness card.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100221867A CN102179966A (en) | 2011-01-20 | 2011-01-20 | Anti-counterfeiting element and anti-counterfeiting product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100221867A CN102179966A (en) | 2011-01-20 | 2011-01-20 | Anti-counterfeiting element and anti-counterfeiting product |
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| CN102179966A true CN102179966A (en) | 2011-09-14 |
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| CN2011100221867A Pending CN102179966A (en) | 2011-01-20 | 2011-01-20 | Anti-counterfeiting element and anti-counterfeiting product |
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Application publication date: 20110914 |