CN205210335U - Pure red optical variable anti -forgery pigment - Google Patents
Pure red optical variable anti -forgery pigment Download PDFInfo
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- CN205210335U CN205210335U CN201520762874.0U CN201520762874U CN205210335U CN 205210335 U CN205210335 U CN 205210335U CN 201520762874 U CN201520762874 U CN 201520762874U CN 205210335 U CN205210335 U CN 205210335U
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Abstract
The utility model relates to a pure red optical variable anti -forgery pigment, anti -forgery pigment includes central reflection stratum, first dielectric layer, first half -absorption layer, second dielectric layer, second half -absorption layer, outwards circulate the symmetry in proper order and be equipped with first dielectric layer and first half -absorption layer in the center reflection stratum, just outer second dielectric layer and the second half -absorption layer of establishing centering reflection stratum two sides for the symmetry of anti -forgery pigment. Analogize with this, according to the increase of total rete number to this is radiated to the external symmetry by central reflection stratum. The utility model discloses an adopt 7 layers of symmetrical structure or 9 layers, 11 layers, 13 layers... 7+'s (2n) symmetrical structure founds in the multiple -beam interference of the blue -green wave band folded light beam condition of disappearing mutually, still will ensure at the multiple -beam interference of red wave band folded light beam longly mutually simultaneously for it is regional to realize that the colour demonstration is located pure red chromaticity.
Description
Technical field
The utility model relates to Techniques of Optical Security field and packing technique field, the particularly pure red optic metachromatic security pigment of one are brushed in high-grade colour printing.
Background technology
The optical color variable pigment (OVP) that based thin film multiple-beam interference principle is obtained and optical disclour printing ink (OVI) obtained are thus the high-end anti-fake materials of anti-counterfeit field, by the product of its printing, there is color display change along with the change of eye-observation visual angle, this color shifting properties adopts common color photocopying, electron scanning all cannot reproduce, anti-counterfeiting performance is extremely strong, plays effect greatly in the product false proof of the financial security such as currency, securities.Also obtain in tobacco and wine product false proof packaging and high-end application market in recent years and apply widely, application particularly in general merchandise, require that such light becomes material except having optically variable anti-counterfeiting function, also to there is good color display effect, so that there is good match colors with printing surface.
In prior art, adopt reflection type optical structure changes to be metal medium 5 layers of symmetrical structure: half-absorption layer/dielectric layer/reflection horizon/dielectric layer/half-absorption layer, Patents US4779898, US5059245, ZL02816899.2, document 1 are described the principle of such optics variable pigments and ink and preparation method, in the optically variable anti-counterfeiting of the Renminbi 100 yuan of China and 50 yuan, also adopt this technology, achieve that to become light variation image that is blue, golden virescence from green false proof.Wherein half-absorption layer normally adopts crome metal, nickel or nickel-chrome material, media coating usually adopt refractive index lower than 1.65 transparent dielectric material, material, the reflective coatings such as such as magnesium fluoride, silicon dioxide, alundum (Al2O3), according to the difference of preparation technology, select the simple metal materials such as metallic aluminium, iron, chromium or nickel-chrome zinc, silver usually.The light-variation film structure of such as patent US5059245, ZL02816899.2, proposition adopts Cr/MgF usually
2/ Al/MgF
2the symmetrical structure of/Cr, this is also the universal architecture of current optical discoloration film, this sandwich symmetrical structure is by adopting different design predominant wavelength, build different optical thickness, the particularly optical thickness of media coating, the interference phase elongate member realizing reflecting light in a certain predominant wavelength regional extent can be met, be formed in the reflection peak of this wavelength region may, destructive interference is formed in adjacent wavelength region may, reflection peak disappears, the a certain color bands of the corresponding visible spectrum in the strongest region of reflection peak, also finally determines our viewed color.
Such as to obtain blueness, green, yellow, the display of red color, need to build design predominant wavelength and be positioned at corresponding color region, 3-8 1/4th optical thicknesses of corresponding media coating design predominant wavelength, can be implemented in corresponding color wave band and interfere long mutually, form principal reflection peak.This class formation is easier to form single principal reflection peak when realizing blue, green, yellow, structure as best seen in figure 1, for vertical incidence is shown in green, tilt 60 degree to observe and change into blue optically variable pigments reflectance spectrum, can find out, it defines principal reflection peak near centre wavelength 530nm, diagram 2 is the phototropic product variation track of this structure, its chromaticity coordinates is changed to blue x=0.2161, the y=0.1706 of 60 degree from green x=0.3208, the y=0.5056 of 0 degree.But this class formation there will be serious colour cast phenomenon when building and being positioned at the pure red color display effect of long wave band, when selecting predominant wavelength to be red band, can see, adopt the light-variation film of such five layers of symmetrical structures, usual meeting forms one at blue wave band and interferes the reflection secondary peak strengthened, such redness and blue reflection peak superimposed, cause the color of usually display to be aubergine or pink, Fig. 4 is 5 layers of symmetrical red light structure changes Vertical Observation chromaticity coordinates of prior art; Structure is 5 layers of symmetrical red light structure changes as shown in Figure 3, and define bireflection peak structure, cause final color to be shown as aubergine, its chromaticity coordinate is x=0.407, y=0.2704.According to CIE-1931 standard colorimetric system to the description of color characteristics, with chromaticity coordinate x, y represents the chromatic value of corresponding color, under D65 standard illuminants light source and CIE-1931 standard sight concrete conditions in the establishment of a specific crime, for pure red color gamut, its chromaticity coordinate should be positioned at x=0.58-0.74, in color block areas constructed by y=0.18-0.4, obviously, above-mentioned aubergine display, although it is interval that chromaticity coordinate y=0.2704 is positioned at pure red y chromaticity coordinate, but x=0.407 is displaced to purple district, entirety is made to be shown as aubergine, can find out, adopt the optically variable anti-counterfeiting film constructed by prior art, all cannot realize the single principal reflection peak in pure red region, also just pure red spectral color cannot be demonstrated, this red area usually signifies celebrating flourishing implied meaning in Chinese tradition meaning, particularly in some high-grade tobacco and wine packagings, pure red color is often the standing color as packaging.For this reason, in optically variable anti-counterfeiting pigment industry, in the urgent need to updating to existing structure, the novel optical optically variable films structure that can realize the display of pure red color is proposed, effectively could improve the color category improving existing optically variable pigments (OVP), enrich color display effect.
Utility model content
Technical problem to be solved in the utility model is: by adopting new 7 layers, 9 layers, 11 layers or 13 layers ... the symmetrical structure of 7+ (2n), n is integer (0,12 ...), by introducing new film layer structure, realize reflectance spectrum and meet interference phase elongate member at red band, meet interference at blue, green, yellow wave band to disappear mutually, eliminate secondary reflex peak, overcoming shortwave reflection secondary peak appears in tradition 5 layers of symmetrical beam structure changes usually phenomenon when constructing red reflex peak, is pure red effect to reach the right-angle view color of integration display.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of pure red optic metachromatic security pigment, described security pigment comprises central reflector, first medium layer, the first half-absorption layer and second dielectric layer, second half-absorption layer, by that analogy, the outside Cyclic Symmetry successively of described central reflector is provided with first medium layer and the first half-absorption layer, second dielectric layer, the second half-absorption layer.By that analogy, according to the increase of total rete number, with this by the outside symmetric radiation of central reflector, the 3rd dielectric layer and the 3rd half-absorption layer, the 4th dielectric layer and the 4th half-absorption layer etc.Red area is as requested different, and the thickness that can arrange the later absorption layer of the second half-absorption layer is 0.
Further, according to CIE-1931 standard colorimetric system to the description of color characteristics, with chromaticity coordinate x, y represents the chromatic value of corresponding color, under D65 standard illuminants light source and CIE-1931 standard sight concrete conditions in the establishment of a specific crime, for pure red color gamut, its chromaticity coordinate should be positioned at x=0.58-0.74, in the color block areas constructed by y=0.18-0.4.
Further, described security pigment comprises central reflector, first medium layer, the first half-absorption layer, second dielectric layer, the second half-absorption layer, the outside Cyclic Symmetry successively of described central reflector is provided with first medium layer and the first half-absorption layer, and described security pigment is outer for being symmetricly set in second dielectric layer and second half-absorption layer on central reflector two sides.
Further, the material of described central reflector is one or more in aluminium, silver, copper, gold, titanium, tantalum, niobium, chromium, nickel, and the thickness of described central reflector is 20-120nm.
Further, the material of described first medium layer is SiO
2, MgF
2, Al
2o
3, AlF
3, Na
3alF
6, BaF
2, NdF
3, CaF
3, one or more in LiF, the thickness of described first medium layer is 190-350nm.
Further, the material of described second dielectric layer is TiO
2, Ta
2o
5, ZrO
2, Nb
2o
5, HfO
2, SiO
2, MgF
2, Al
2o
3, AlF
3, Na
3alF
6, BaF
2, NdF
3, CaF
3, one or more in LiF, described second medium layer thickness is 200-350nm.
Further, the material of described first half-absorption layer is one or more in titanium, tantalum, niobium, nickel, chromium, and the thickness of described half-absorption layer is 2-15nm.
Further, the material of described second half-absorption layer is one or more in titanium, tantalum, niobium, nickel, chromium, and the thickness of described half-absorption layer is for being less than 5nm.
The beneficial effects of the utility model are: by adopting new 7 layers, 9 layers, 11 layers or 13 layers ... the symmetrical structure of 7+ (2n), n is integer, reflectance spectrum can be realized and meet interference phase elongate member at red band, meet interference at blue, green, yellow wave band to disappear mutually condition, overcoming shortwave reflection secondary peak appears in tradition 5 layers of symmetrical beam structure changes usually phenomenon when constructing red reflex peak, is pure red effect to reach the color of integration display.Fill up the inherent shortcoming of current optical color variable pigment in red display, enrich the color display effect of optically variable pigments.
Accompanying drawing explanation
Fig. 1 is 5 layers of symmetrical green light structure changes Vertical Observation reflectance spectrum of prior art;
Fig. 2 is 5 layers of symmetrical green light structure changes, 0 degree of-60 degree chromaticity variation track of prior art;
Fig. 3 is 5 layers of symmetrical red light structure changes Vertical Observation reflectance spectrum of prior art;
Fig. 4 is 5 layers of symmetrical red light structure changes Vertical Observation chromaticity coordinates of prior art;
Fig. 5 is the structural representation of the pure red optic metachromatic security pigment of 9 layers of the utility model embodiment embodiment;
Fig. 6 is 9 layers of symmetrical red light structure changes Vertical Observation reflectance spectrum of the utility model embodiment embodiment;
Fig. 7 is 9 layers of symmetrical red light structure changes, 0 degree of-60 degree chromaticity variation track of the utility model embodiment embodiment;
Fig. 8 is the pure red optic metachromatic security pigment preparation technology process flow diagram of the utility model embodiment embodiment;
Fig. 9 is pure red 7 layers of metal medium symmetrical expression optically variable anti-counterfeiting film layer structure schematic diagram of the utility model embodiment;
Figure 10 is the reflectance spectrum of the symmetrical beam variation film structure of 7 layers of pure red optic metachromatic security pigment of the utility model embodiment;
Figure 11 be 7 layers of pure red optic metachromatic security pigment of the utility model embodiment from Vertical Observation to 60 degree of angle observations time colourity variation track;
The reflectance spectrum of the structure of 9 layers of pure red optic metachromatic security pigment of Figure 12 utility model embodiment;
Figure 13 be 9 layers of pure red optic metachromatic security pigment of the utility model embodiment from Vertical Observation to 60 degree of angle observations time colourity variation track;
Label declaration:
1, central reflector; 2, first medium layer; 3, the first half-absorption layer; 4, second dielectric layer; 5, the second half-absorption layer.
Embodiment
By describing technology contents of the present utility model in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with embodiment.
The design of the utility model most critical is: by adopt 7 layers of new symmetrical structure or ... the symmetrical structure of 7+ (2n), the multiple-beam interference being structured in blue-green wave band folded light beam disappears condition mutually, also to guarantee at the multiple-beam interference of red band folded light beam long mutually simultaneously, be positioned at pure red chromaticity region in order to realize color display.
Please refer to Fig. 1-6, optically variable pigments coating different from the past, the utility model provides a kind of pure red optic metachromatic security pigment, described security pigment comprises central reflector 1, first medium layer 2, first half-absorption layer 3 and second dielectric layer 4, the outside Cyclic Symmetry successively of described central reflector is provided with first medium layer 2 and the first half-absorption layer 3, and described security pigment outermost layer is the second dielectric layer 4 being symmetricly set in central reflector two sides.
Further, above-mentioned pure red optical color variable pigment coating, described security pigment comprises central reflector 1, first medium layer 2, first half-absorption layer 3, second dielectric layer 4, second half-absorption layer 5, the outside Cyclic Symmetry successively of described central reflector 1 is provided with first medium layer 2 and the first half-absorption layer 3, and described security pigment outermost layer is second dielectric layer 4, second half-absorption layer 5 being symmetricly set in central reflector 1 two sides.
Above-mentioned pure red optic metachromatic security pigment, according to CIE-1931 standard colorimetric system to the description of color characteristics, with chromaticity coordinate x, y represents the chromatic value of corresponding color, under D65 standard illuminants light source and CIE-1931 standard sight concrete conditions in the establishment of a specific crime, for pure red color gamut, its chromaticity coordinate should be positioned at x=0.58-0.74, in the color block areas constructed by y=0.18-0.4.
From foregoing description, the beneficial effects of the utility model are: by adopt 7 layers of new symmetrical structure or ... the symmetrical structure of 7+ (2n), n is natural number, reflectance spectrum can be realized and meet interference phase elongate member at red band, meet interference at blue, green, yellow wave band to disappear mutually condition, overcoming shortwave reflection secondary peak appears in tradition 5 layers of symmetrical beam structure changes usually phenomenon when constructing red reflex peak, is pure red effect to reach the color of integration display.Fill up the inherent shortcoming of current optically variable anti-counterfeiting pigment in red display, enrich the color display effect of optically variable pigments.
Further, the material of described central reflector 1 is one or more in aluminium, silver, copper, gold, titanium, tantalum, niobium, chromium, nickel, and the thickness of described central reflector 1 is 20-120nm.
Seen from the above description, best colour brightness is provided by control material and thickness.
Further, the material of described first medium layer 2 is SiO
2, MgF
2, Al
2o
3, AlF
3, Na
3alF
6, BaF
2, NdF
3, CaF
3, one or more in LiF, the thickness of described first medium layer is 190-350nm.
Seen from the above description, transparent all dielectric material adjustment shade of color is adopted.
Further, the material of described first half-absorption layer 3 is one or more in titanium, tantalum, niobium, nickel, chromium, and the thickness of described half-absorption layer is 2-15nm.
Seen from the above description, super thin metal is adopted to control color saturation.
Further, the material of described second dielectric layer 4 is TiO
2, Ta
2o
5, ZrO
2, Nb
2o
5, HfO
2, SiO
2, MgF
2, Al
2o
3, AlF
3, Na
3alF
6, BaF
2, NdF
3, CaF
3, one or more in LiF, described second medium layer thickness is 200-350nm.
Seen from the above description, suitable material and thickness is provided to eliminate rete to reflection secondary peak.
Further, the material of described second half-absorption layer 5 is one or more in titanium, tantalum, niobium, nickel, chromium, and the thickness of described half-absorption layer is less than 5nm.
Seen from the above description, super thin metal is adopted to control color saturation.
The utility model additionally provides a kind of preparation method of pure red optic metachromatic security pigment, comprises the following steps:
1) choose at the bottom of the stainless steel lining of smooth, polished or glass substrate;
2) separating film layer is prepared: by step 1) substrate coating of gained obtains separating film layer;
3) pure red optic metachromatic film is prepared: by step 2) separating film layer of gained applies successively the second half-absorption layer, second dielectric layer, the first half-absorption layer, first medium layer, the second half absorbing membranous layers, central reflector, first medium layer, the first half-absorption layer, second dielectric layer, the second half-absorption layer, obtain being symmetricly set in the layer on central reflector two sides;
4) prepare separating film layer, repeat the coating flow process of step 3, complete until the maximum cycle numeral system allowed is standby;
5) demoulding: by step 4) substrate being symmetricly set in the layer on central reflector two sides of gained is placed in organic solvent-acetone or methyl ethyl ketone solution or ultra-pure deionized water, obtains optical color variable pigment fragment;
6) rinsing, filtration step 5) the optic metachromatic security pigment fragment of gained;
7) pulverising step 6) the optic metachromatic security pigment fragment of gained;
8) modification procedure 7) the optic metachromatic powder of gained, dropped in the saturated solution of rosin or stearic acid (as dehydroabietic acid tetrahydro colophonic acid etc.) by the powder collected and fully stir more than 0.5h, then sedimentation and filtration is dried and can be obtained pure red optic metachromatic security pigment.
From foregoing description, the beneficial effects of the utility model are: by prepare 7 layers of symmetrical structure or ... the symmetrical structure of 7+ (2n), realize reflectance spectrum and meet interference phase elongate member at red band, meet interference at blue, green, yellow wave band to disappear mutually condition, overcoming shortwave reflection secondary peak appears in tradition 5 layers of symmetrical beam structure changes usually phenomenon when constructing red reflex peak, is pure red effect to reach the color of integration display.The preparation method of such pure red optically variable pigments coating can adopt equipment that traditional optical camouflage paint is identical and preparation technology to carry out, and process conditions are ripe, and production cost is low, do not need to add miscellaneous equipment and can realize the preparation of such pigment.
Embodiment one of the present utility model is:
Fig. 5 is pure red 9 layers of metal medium symmetrical expression optically variable anti-counterfeiting rete (the pure red optic metachromatic security pigment) structural representation of the utility model, described rete comprises the second half-absorption layer 5, second dielectric layer 4, first half-absorption layer 3, the first medium layer 2 that set gradually, central reflector 1, first medium layer 2, first half-absorption layer 3, second dielectric layer 4, second half-absorption layer 5, described central reflector 1 are made up of metal material titanium, and the thickness of described central reflector is 100nm.Second half-absorption layer 5 is as saturation degree regulating course, and adopt half to absorb metallic film material Ti and form, described second half-absorption layer thickness 3nm, second dielectric layer 4 eliminates rete as reflection secondary peak, adopts transparent all dielectric material to form; The material of described second dielectric layer is TiO
2, the thickness of described second dielectric layer 4 is 265nm; Described first half-absorption layer 3 controls rete as color saturation, and employing half absorbs metallic film material and forms, and refractive index and the extinction coefficient that partly should absorb the composition material of metallic diaphragm are close, to improve the saturation degree requirement in colour planning.The material of described half-absorption layer is crome metal, and the thickness of described individual layer half-absorption layer is 8nm; Described first medium layer 2, as color dominant hue key-course, adopts transparent all dielectric material to form; The material of described dielectric layer is MgF
2, the thickness of described single-layer medium layer is 245nm.
Film layer structure combination is become according to the light of the present embodiment, can realize being shown as pure red in the first viewing angle at single direction, be different from the second color of the first color in the second viewing angle display, according to project organization, Equations of The Second Kind color is generally yellow, yellow green, green.
Refer to Fig. 6, for the reflectance spectrum of above-mentioned 9 layers of symmetrical beam variation film (pure red optic metachromatic security pigment) structure, can see, in limit of visible spectrum 400nm-760nm scope, average reflectance that is blue, green, yellow spectrum wave band 400nm-600nm only has 2.48%, the average reflectance of red band is greater than 50%, main peak wavelength is positioned at 710nm, reflectivity is greater than 60%, illustrates that having adopted this structure effective eliminates the shortwave reflection secondary peak that tradition 5 layers of red light become anti-counterfeit structure.Consult Fig. 7, according to International Commission on Illumination CIE-1931 standard colorimetric system to the description of color characteristics, with chromaticity coordinate x, y represents the chromatic value of corresponding color, under D65 standard illuminants light source and CIE-1931 standard sight concrete conditions in the establishment of a specific crime, for the pure red smooth structure changes of above-mentioned 9 layers of symmetry, when Vertical Observation, its chromaticity coordinate is x=0.6067, y=0.3235, be positioned at pure red chromaticity coordinate x=0.58-0.74 described in the utility model, color block areas constructed by y=0.18-0.4, this structure its chromaticity coordinate when 60 degree of angles are observed is x=0.4194, y=0.4627, corresponding color is shown as golden yellow, colourity variation track when Fig. 7 describes out this 7 Rotating fields from Vertical Observation to 60 degree of angle observations, can find out, it is be changed to golden yellow from pure red that the light of this structure becomes color change sequence.
Refer to Fig. 8, be the process chart of the pure red optically variable pigments preparation method of the utility model, the method comprises the following steps: first provide the substrate that light-variation film carries, and substrate can adopt as at the bottom of the stainless steel lining of design or glass substrate; Method for manufacturing thin film selects a kind of or above-mentioned three kind modes the combination in any of physical vapour deposition (PVD) (PVD) as thermal resistance evaporation, electron beam evaporation, sputtering sedimentation to realize.PVD is adopted to prepare separating film layer over the substrate, then first-selected formation the second half-absorption layer 5 on separating film layer, form second dielectric layer 4 again, the first half-absorption layer 3 is formed after this dielectric layer, this half-absorption layer 4 forms again first medium layer 2, first medium layer 2 is formed central reflector 1, central reflector 1 is formed first medium layer 2, first medium layer 2 is formed the first half-absorption layer 3, half-absorption layer 4 is formed second dielectric layer 4, finally form the second half-absorption layer 5, wherein first medium layer can be identical with second medium layer material, also different materials can be selected, the Film preparation of 9 layers of symmetrical structure is completed to this.After prepared by these 9 layers of symmetrical structures, again producing separating film layer, is above-mentioned 9 layers of symmetrical structure with this, as the cycle, repeat 15-40 time, ensure thus under the condition that vacuumizes of once installing, improve equipment capacity to greatest extent, reduce equipment power dissipation, enhance productivity.After adopting the method to complete repeated growth, rigid substrate defines the periodicity composite structure of multiple separating film layer and multiple pure red color structure combination, the rigid substrate of the above-mentioned cycle film layer structure of carrying is placed in specific solvent from vacuum chamber taking-up and carries out demoulding operation, separating film layer will melt in demoulding solvent, above-mentioned periodicity light structure changes will strip down from rigid substrate, the light structure changes of multiple repetition also can be separated, then collect the change of the light after being separated material and carry out rinsing, filter, particle pulverizing is carried out by typography requirement, finally surface modification treatment is carried out to the powder after pulverizing, final pure red optically variable pigments goods can be arrived.
Embodiment two of the present utility model is:
Fig. 9, the pure red 7 layers of metal medium symmetrical expression optically variable anti-counterfeiting film layer structure schematic diagram of the utility model, described rete comprises and sets gradually as second dielectric layer 4, first half-absorption layer 3, first medium layer 2, central reflector 1, first medium layer 2, first half-absorption layer 3, second dielectric layer 4, described central reflector 1 is made up of metal material Al, and the thickness of described central reflector is 120nm.Here red area is as requested different, and can arrange the second half-absorption layer 5 thickness is 0, and second dielectric layer 4 eliminates rete as reflection secondary peak, adopts transparent all dielectric material to form; The material of described second dielectric layer is MgF
2, the thickness of described second dielectric layer 4 is 335nm; Described first half-absorption layer 3 controls rete as color saturation, and employing half absorbs metallic film material and forms, and refractive index and the extinction coefficient that partly should absorb the composition material of metallic diaphragm are close, to improve the saturation degree requirement in colour planning.The material of described half-absorption layer is crome metal, and the thickness of described individual layer half-absorption layer is 11nm; Described first medium layer 2, as color dominant hue key-course, adopts transparent all dielectric material to form; The material of described dielectric layer is MgF
2, the thickness of described single-layer medium layer is 265nm;
Film layer structure combination is become according to the light of the present embodiment, can realize being shown as pure red in the first viewing angle at single direction, be different from the second color of the first color in the second viewing angle display, according to project organization, Equations of The Second Kind color is generally yellow, yellow green, green.
Refer to Figure 10, it is the reflectance spectrum of 7 layers of symmetrical beam variation film structure, can see, in limit of visible spectrum 400nm-760nm scope, average reflectance that is blue, green, yellow spectrum wave band 400nm-600nm only has 4.63%, and the average reflectance of red band is greater than 75%, and main peak wavelength is positioned at 710nm, reflectivity is greater than 85%, illustrates that having adopted this structure effective eliminates the shortwave reflection secondary peak that tradition 5 layers of red light become anti-counterfeit structure.Consult Figure 11, according to International Commission on Illumination CIE-1931 standard colorimetric system to the description of color characteristics, with chromaticity coordinate x, y represents the chromatic value of corresponding color, under D65 standard illuminants light source and CIE-1931 standard sight concrete conditions in the establishment of a specific crime, for the pure red smooth structure changes of above-mentioned 7 layers of symmetry, when Vertical Observation, its chromaticity coordinate is x=0.5943, y=0.3235, be positioned at pure red chromaticity coordinate x=0.58-0.74 described in the utility model, color block areas constructed by y=0.18-0.4, this structure its chromaticity coordinate when 60 degree of angles are observed is x=0.4232, y=0.4751, corresponding color is shown as yellow green, colourity variation track when Figure 11 describes out this 7 Rotating fields from Vertical Observation to 60 degree of angle observations, can find out, it is be changed to yellow green from pure red that the light of this structure becomes color change sequence.
The utility model is pure red optically variable pigments preparation method comprise the following steps: first provide the substrate that light-variation film carries, and substrate can adopt as at the bottom of the stainless steel lining of design or glass substrate; Method for manufacturing thin film selects a kind of or above-mentioned three kind modes the combination in any of physical vapour deposition (PVD) (PVD) as thermal resistance evaporation, electron beam evaporation, sputtering sedimentation to realize.PVD is adopted to prepare separating film layer over the substrate, then first-selected formation second dielectric layer 4 on separating film layer, the first half-absorption layer 3 is formed after this dielectric layer, this half-absorption layer 4 forms again first medium layer 2, first medium layer 2 is formed central reflector 1, central reflector 1 is formed first medium layer 2, first medium layer 2 is formed the first half-absorption layer 3, half-absorption layer 4 is formed second dielectric layer 4, wherein first medium layer can be identical with second medium layer material, also different materials can be selected, the Film preparation of 7 layers of symmetrical structure is completed to this.After prepared by these 7 layers of symmetrical structures, again producing separating film layer, is above-mentioned 7 layers of symmetrical structure with this, as the cycle, repeat 15-40 time, ensure thus under the condition that vacuumizes of once installing, improve equipment capacity to greatest extent, reduce equipment power dissipation, enhance productivity.After adopting the method to complete repeated growth, rigid substrate defines the periodicity composite structure of multiple separating film layer and multiple pure red color structure combination, the rigid substrate of the above-mentioned cycle film layer structure of carrying is placed in specific solvent from vacuum chamber taking-up and carries out demoulding operation, separating film layer will melt in demoulding solvent, above-mentioned periodicity light structure changes will strip down from rigid substrate, the light structure changes of multiple repetition also can be separated, then collect the change of the light after being separated material and carry out rinsing, filter, particle pulverizing is carried out by typography requirement, finally surface modification treatment is carried out to the powder after pulverizing, final pure red optically variable pigments goods can be arrived.
Embodiment three of the present utility model is:
The utility model example is pure red 9 layers of metal medium symmetrical expression optically variable anti-counterfeiting film layer structure, described rete comprises the second half-absorption layer 5, second dielectric layer 4, first half-absorption layer 3, the first medium layer 2 that set gradually, central reflector 1, first medium layer 2, first half-absorption layer 3, second dielectric layer 4, second half-absorption layer 5, described central reflector 1 are made up of metal material nickel-chrome, and the thickness of described central reflector is 50nm.Second half-absorption layer 5 is as saturation degree regulating course, and adopt half to absorb metallic film material nickel-chrome and form, described second half-absorption layer thickness 5nm, second dielectric layer 4 eliminates rete as reflection secondary peak, adopts transparent all dielectric material to form; The material of described second dielectric layer is SiO2
2, the thickness of described second dielectric layer 4 is 200nm; Described first half-absorption layer 3 controls rete as color saturation, and employing half absorbs metallic film material and forms, and refractive index and the extinction coefficient that partly should absorb the composition material of metallic diaphragm are close, to improve the saturation degree requirement in colour planning.The material of described half-absorption layer is nickel-chrome, and the thickness of described individual layer half-absorption layer is 15nm; Described first medium layer 2, as color dominant hue key-course, adopts transparent all dielectric material to form; The material of described dielectric layer is SiO
2, the thickness of described single-layer medium layer is 190nm;
Film layer structure combination is become according to the light of the present embodiment, can realize being shown as pure red in the first viewing angle at single direction, be different from the second color of the first color in the second viewing angle display, according to project organization, Equations of The Second Kind color is generally yellow, yellow green, green.
Refer to Figure 12, for the reflectance spectrum of above-mentioned 9 layers of symmetrical beam variation film structures (pure red optic metachromatic security pigment), can see, in limit of visible spectrum 400nm-760nm scope, average reflectance that is blue, green, yellow spectrum wave band 400nm-600nm only has 2.58%, the average reflectance of red band is greater than 50%, main peak wavelength is positioned at 680nm, reflectivity is greater than 60%, illustrates that having adopted this structure effective eliminates the shortwave reflection secondary peak that tradition 5 layers of red light become anti-counterfeit structure.Consult Figure 13, according to International Commission on Illumination CIE-1931 standard colorimetric system to the description of color characteristics, with chromaticity coordinate x, y represents the chromatic value of corresponding color, under D65 standard illuminants light source and CIE-1931 standard sight concrete conditions in the establishment of a specific crime, for the pure red smooth structure changes of above-mentioned 9 layers of symmetry, when Vertical Observation, its chromaticity coordinate is x=0.6209, y=0.3277, be positioned at pure red chromaticity coordinate x=0.58-0.74 described in the utility model, color block areas constructed by y=0.18-0.4, this structure its chromaticity coordinate when 60 degree of angles are observed is x=0.3795, y=0.4940, corresponding color is shown as yellow green, colourity variation track when Figure 13 describes out this 9 Rotating fields from Vertical Observation to 60 degree of angle observations, can find out, it is be changed to yellow green from pure red that the light of this structure becomes color change sequence.
Above-mentioned pure red optically variable pigments preparation method comprises the following steps: first provide the substrate that light-variation film carries, and substrate can adopt as at the bottom of the stainless steel lining of design or glass substrate; Method for manufacturing thin film selects a kind of or above-mentioned three kind modes the combination in any of physical vapour deposition (PVD) (PVD) as thermal resistance evaporation, electron beam evaporation, sputtering sedimentation to realize.PVD is adopted to prepare separating film layer over the substrate, then first-selected formation the second half-absorption layer on separating film layer, form second dielectric layer again, the first half-absorption layer is formed after this dielectric layer, this half-absorption layer forms again first medium layer, first medium layer forms central reflector, central reflector is formed first medium layer, first medium layer is formed the first half-absorption layer, half-absorption layer forms second dielectric layer, finally form the second half-absorption layer, wherein first medium layer can be identical with second medium layer material, also different materials can be selected, the Film preparation of 9 layers of symmetrical structure is completed to this.After prepared by these 9 layers of symmetrical structures, again producing separating film layer, is above-mentioned 9 layers of symmetrical structure with this, as the cycle, repeat 15-40 time, ensure thus under the condition that vacuumizes of once installing, improve equipment capacity to greatest extent, reduce equipment power dissipation, enhance productivity.After adopting the method to complete repeated growth, rigid substrate defines the periodicity composite structure of multiple separating film layer and multiple pure red color structure combination, the rigid substrate of the above-mentioned cycle film layer structure of carrying is placed in specific solvent from vacuum chamber taking-up and carries out demoulding operation, separating film layer will melt in demoulding solvent, above-mentioned periodicity light structure changes will strip down from rigid substrate, the light structure changes of multiple repetition also can be separated, then collect the change of the light after being separated material and carry out rinsing, filter, particle pulverizing is carried out by typography requirement, finally surface modification treatment is carried out to the powder after pulverizing, final pure red optically variable pigments goods can be arrived.
In sum, pure red optic metachromatic security pigment of the one that the utility model provides and preparation method thereof, by preparing 7 layers of symmetrical structure or 9 layers, 11 layers, 13 layers ... the symmetrical structure of 7+ (2n), realize reflectance spectrum and meet interference phase elongate member at red band, meet interference at blue, green, yellow wave band to disappear mutually condition, overcoming shortwave reflection secondary peak appears in tradition 5 layers of symmetrical beam structure changes usually phenomenon when constructing red reflex peak, is pure red effect to reach the color of integration display.The preparation method of such pure red optically variable pigments coating can adopt equipment that traditional optical camouflage paint is identical and preparation technology to carry out, and process conditions are ripe, and production cost is low, do not need to add miscellaneous equipment and can realize the preparation of such pigment.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalents utilizing the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. a pure red optic metachromatic security pigment, it is characterized in that, described security pigment comprises central reflector, first medium layer, the first half-absorption layer and second dielectric layer, the outside Cyclic Symmetry successively of described central reflector is provided with first medium layer and the first half-absorption layer, and described security pigment outermost layer is the second dielectric layer being symmetricly set in central reflector two sides.
2. pure red optic metachromatic security pigment according to claim 1, it is characterized in that, described security pigment comprises central reflector, first medium layer, the first half-absorption layer, second dielectric layer, the second half-absorption layer, the outside Cyclic Symmetry successively of described central reflector is provided with first medium layer and the first half-absorption layer, and described security pigment is outer for being symmetricly set in second dielectric layer and second half-absorption layer on central reflector two sides.
3. pure red optic metachromatic security pigment according to claim 2, is characterized in that, the material of described central reflector is the one in aluminium, silver, copper, gold, titanium, tantalum, niobium, chromium, nickel, and the thickness of described central reflector is 20-120nm.
4. pure red optic metachromatic security pigment according to claim 2, is characterized in that, the material of described first medium layer is SiO
2, MgF
2, Al
2o
3, AlF
3, Na
3alF
6, BaF
2, NdF
3, CaF
3, one in LiF, the thickness of described first medium layer is 190-350nm.
5. pure red optic metachromatic security pigment according to claim 1, is characterized in that, the material of described second dielectric layer is TiO
2, Ta
2o
5, ZrO
2, Nb
2o
5, HfO
2, SiO
2, MgF
2, Al
2o
3, AlF
3, Na
3alF
6, BaF
2, NdF
3, CaF
3, one in LiF, described second medium layer thickness is 200-350nm.
6. pure red optic metachromatic security pigment according to claim 2, is characterized in that, the material of described first half-absorption layer is the one in titanium, tantalum, niobium, nickel, chromium, and the thickness of described half-absorption layer is 2-15nm.
7. pure red optic metachromatic security pigment according to claim 2, is characterized in that, the material of described second half-absorption layer is the one in titanium, tantalum, niobium, nickel, chromium, and the thickness of described half-absorption layer is for being less than 5nm.
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| CN201520762874.0U CN205210335U (en) | 2015-09-29 | 2015-09-29 | Pure red optical variable anti -forgery pigment |
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|---|---|---|---|
| CN201520762874.0U CN205210335U (en) | 2015-09-29 | 2015-09-29 | Pure red optical variable anti -forgery pigment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137519A (en) * | 2015-09-29 | 2015-12-09 | 厦门汉盾光学科技有限公司 | Optically variable anti-counterfeiting pure red pigment and preparation method thereof |
| CN108752977A (en) * | 2018-06-29 | 2018-11-06 | 林中 | There is the pigment and preparation method thereof of high brightness, excitation purity and covering effect simultaneously |
-
2015
- 2015-09-29 CN CN201520762874.0U patent/CN205210335U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137519A (en) * | 2015-09-29 | 2015-12-09 | 厦门汉盾光学科技有限公司 | Optically variable anti-counterfeiting pure red pigment and preparation method thereof |
| CN105137519B (en) * | 2015-09-29 | 2018-01-12 | 厦门汉盾光学科技有限公司 | A kind of pure red optic metachromatic security pigment and preparation method thereof |
| CN108752977A (en) * | 2018-06-29 | 2018-11-06 | 林中 | There is the pigment and preparation method thereof of high brightness, excitation purity and covering effect simultaneously |
| WO2020001010A1 (en) * | 2018-06-29 | 2020-01-02 | 林一中 | Pigment simultaneously having high brightness, color purity and coverage effect and preparation method therefor |
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