CN212010136U - Point light source recognizing laser encrypted plastic film anti-counterfeiting mark - Google Patents
Point light source recognizing laser encrypted plastic film anti-counterfeiting mark Download PDFInfo
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- CN212010136U CN212010136U CN202021085220.6U CN202021085220U CN212010136U CN 212010136 U CN212010136 U CN 212010136U CN 202021085220 U CN202021085220 U CN 202021085220U CN 212010136 U CN212010136 U CN 212010136U
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Abstract
The utility model belongs to the technical field of it is anti-fake, concretely relates to pointolite recognition laser encryption moulds membrane false proof mark. The laser encrypted plastic film anti-counterfeiting mark comprises a PET layer, an imaging layer, a laser encrypted information layer, a copying layer, a printing layer, a gravure layer, a pressure sensitive adhesive layer and a silicone oil paper layer which are sequentially connected from top to bottom, wherein digital coding information is hidden in the laser encrypted information layer. The utility model discloses a grating space frequency and two parameters of grating angle in the grating lattice, preparation laser encryption information layer mould pressing version, duplicate laser encryption information on PET formation of image layer, form laser encryption information layer, the consumer only is opening anti-counterfeit identification back, uses hand-held type point light source equipment to shine the sign reverse side, will present hidden information, the consumer is through distinguishing hidden information, judges the sign true and false, makes anti-counterfeit identification have the exclusivity.
Description
Technical Field
The utility model belongs to the technical field of it is anti-fake, concretely relates to pointolite recognition laser encryption moulds membrane false proof mark.
Background
At present, the code anti-counterfeiting mark used in the anti-counterfeiting market is a laser code anti-counterfeiting mark and a paper surface code anti-counterfeiting mark which are popular for many years, and the technology is relatively laggard and is easy to counterfeit, so that the phenomenon that the fish dragons mix with beads in the market is caused.
The introduction of laser die stamping holographic anti-counterfeiting technology into China is that hundreds of production lines are introduced all over the country in the late 80 s and early 90 s, especially in the period from 1990 to 1994, and account for more than half of the world manufacturers at that time. In the early stage of introduction, the anti-counterfeiting technology indeed plays a certain anti-counterfeiting role, but as time goes on, the laser holographic image making technology is rapidly diffused, so that counterfeiters have broken through from various aspects nowadays, the anti-counterfeiting capability is almost completely lost, and people have to seek to improve the prior art. Therefore, optical image coding encryption technologies such as laser reading, optical micro-lithography, low-frequency lithography, random interference fringes and moire fringes are adopted, all the technologies need professional detection equipment to identify the authenticity, so that many consumers cannot use the anti-counterfeiting characteristics to identify the authenticity, and the market popularization is not facilitated.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defect of the prior art is overcome, a point light source recognizing and reading laser encryption plastic film anti-counterfeiting mark is provided, the anti-counterfeiting mark comprises a hidden digital coding information grating structure, a consumer can present hidden information only by exposing the anti-counterfeiting mark, and irradiating the reverse side of the mark by using handheld point light source equipment, and the consumer judges the authenticity of the mark by identifying the hidden information, so that the mark has exclusivity.
Pointolite recognition laser encryption mould membrane false proof mark, include from the top down consecutive PET layer, formation of image layer, laser encryption information layer, duplicate layer, printing layer, gravure layer, pressure sensitive adhesive layer and silicon oil ply laser encryption information layer the inside hides digital coding information.
The PET layer is a single-side corona PET film with the thickness of 12-50 mu m.
The PET layer and the imaging layer are inseparable.
The replication layer is UV gloss oil capable of replicating holographic patterns.
The 90-degree peel strength between the copying layer and the laser encryption information layer is 0.0025-0.0060 kilonewton/meter.
The thickness of the replication layer is 4-6 μm.
When the copy layer and the laser encryption information layer are combined together, the laser encryption information cannot be detected. Only after the copy layer is stripped, the laser encrypted information can be detected. When the replica layer is peeled off, the laser encrypted information can be detected either on the PET or on the replica layer.
The hidden digital coding information pattern in the laser encryption information layer is one or more than one of characters, letters, numbers, symbols or figures.
The hidden digital coding information in the laser encryption information layer is composed of a plurality of square grating lattice arrays, the processing mode is laser etching, and the grating lattices contain two parameters of grating space frequency and grating angle.
The preparation method of the spot light source reading laser encryption plastic film anti-counterfeiting mark comprises the following steps:
(1) selecting a single-side corona PET film as a PET layer, and coating an imaging layer on the corona surface of the PET film;
(2) manufacturing a laser encrypted information layer mould pressing plate:
firstly, manufacturing a hidden pattern, placing the hidden pattern in a polar coordinate system, randomly extracting N (N is N x N) pixel points according to a system sampling method, wherein N is more than or equal to 4, respectively calculating the distance rho between each pixel point and the zero point of the coordinate system and the included angle theta, obtaining an N x N matrix according to the distance between each pixel point and the zero point of the coordinate system, and finally obtaining an empty-frequency gray-scale map matrix G; obtaining an n x n matrix according to an included angle between each pixel point and a zero point of a coordinate system, finally obtaining an angle gray-scale map matrix H, and completing plate making work of a laser encryption information layer mould pressing layer in a photoetching machine according to a space frequency gray-scale map matrix G and the angle gray-scale map matrix H to obtain a laser encryption information layer mould pressing plate;
(3) copying the laser encryption information on the PET imaging layer by using a molding press to form a laser encryption information layer;
(4) coating a copy layer on the laser encrypted information layer;
(5) printing anti-counterfeiting features on the copying layer to form a printing layer;
(6) printing gravure white ink on the printing layer surface by using a gravure press to form a gravure layer;
(7) coating a pressure-sensitive adhesive layer on the gravure layer by using a glue spreader and compounding the pressure-sensitive adhesive layer with the silicone oil paper layer;
(8) and (5) die-cutting the mark into single marks by using a die-cutting machine to obtain the mark.
The manufacturing method of the laser encryption information layer mould pressing plate comprises the following steps:
(1) according to the design file, making a hidden pattern, establishing a polar coordinate system, and placing the pattern at a zero point in the polar coordinate system;
(2) the resolution of the pattern is a b, the pattern is composed of a b pixel points, N (N is N) pixel points are randomly extracted according to a system sampling method, wherein N is more than or equal to 4, and a computer is used for calculating the coordinate value (x) of each pixel point1，y1)、(x2，y2)、(x3，y3)、……(xN，yN) And the distance (p) of each pixel point from the zero point1、ρ2、ρ3、……ρN)；
(3) Calculating the included angle (theta) between each pixel point and the zero point according to the polar coordinate system formula x ═ rho cos theta and y ═ rho cos theta1、θ1、θ1、……θN)；
(4) L is an observation distance, is a fixed parameter, betaFor the grating angle, d is the grating pitch, λ is the laser wavelength, β can be determined from tan β ═ ρ/L, and the grating pitch d can be determined from the grating equation sin β ═ λ/d, at which time a two-dimensional parameter (d) can be established for each grating lattice1，θ1)、(d2，θ2)、(d3，θ3)……(dN，θN)；
(5) From the grating pitch d of the N grating lattices, a matrix can be obtained as follows:
d1，d2，……………………dn
dn+1，dn+2，………………d2*n
………………………………
dn*(n-1)+1，dn*(n-1)+2，……dn*n
calculating to obtain the maximum value d of dmaxAnd a minimum value dminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N d can be mapped to another matrix G composed of gray values, and the matrix G constitutes a gray map as follows:
G1，G2，……………………Gn
Gn+1，Gn+2，………………G2*n
………………………………
Gn*(n-1)+1，Gn*(n-1)+2，……Gn*n；
(6) from the angles θ of the N grating lattices, a matrix can be obtained as follows:
θ1，θ2，……………………θn
θn+1，θn+2，………………θ2*n
………………………………
θn*(n-1)+1，θn*(n-1)+2，……θn*n
calculating to obtain the maximum value theta of thetamaxAnd minimum value thetaminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N θ can be mapped to another matrix H composed of gray values, and the matrix constitutes a gray map as follows:
H1，H2，……………………Hn
Hn+1，Hn+2，………………H2*n
………………………………
Hn*(n-1)+1，Hn*(n-1)+2，……Hn*n；
(7) manufacturing an exposure unit according to the photoetching space frequency gray matrix G and the grating angle gray matrix H, wherein the size of the exposure unit is a square with the side length of n/R mm, R is the resolution of a photoetching image, and R is more than 10dpi and less than 50800 dpi;
(8) and (4) forming the exposure unit array in the step (7) into a designed size, manufacturing the exposure unit array on a photoetching offset plate through a photoetching process, and developing and electroplating to obtain the laser encryption information layer mould pressing plate.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model relates to a new anti-fake characteristic makes the sign have the exclusivity.
2. The utility model discloses be convenient for the consumer carries out the true and false inquiry.
3. The utility model discloses before the sign does not destroy, can't look over anti-fake characteristic, only can carry out true and false authentication after revealing the sign.
4. The utility model discloses a mathematical algorithm realizes a new anti-fake characteristic.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a hidden pattern in embodiment 1 of the present invention;
fig. 3 is a grayscale diagram corresponding to the matrix G in embodiment 1 of the present invention;
fig. 4 is a grayscale diagram corresponding to the matrix H in embodiment 1 of the present invention;
in the figure: 1. a PET layer; 2. an imaging layer; 3. a laser encrypted information layer; 4. a replication layer; 5. printing layer; 6. gravure printing layer; 7. a pressure sensitive adhesive layer; 8. a silicone oil paper layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the point light source reading laser encryption plastic film anti-counterfeiting mark comprises a PET layer 1, an imaging layer 2, a laser encryption information layer 3, a replication layer 4, a printing layer 5, a gravure layer 6, a pressure sensitive adhesive layer 7 and a silicone oil paper layer 8 which are sequentially connected from top to bottom, wherein digital coding information is hidden in the laser encryption information layer 3.
The PET layer 1 is a single-side corona PET film with the thickness of 20 mu m.
The PET layer 1 and the imaging layer 2 are not separable.
The replication layer 4 is a UV gloss oil capable of replicating a holographic pattern.
The thickness of the replication layer 4 is 5 μm.
The preparation method of the point light source reading laser encryption plastic film anti-counterfeiting mark is characterized by comprising the following steps: the method comprises the following steps:
(1) selecting a single-side corona PET film as a PET layer, and coating a permanent imaging layer on the corona surface of the PET film, wherein the imaging layer and the PET film are inseparable;
(2) manufacturing a laser encrypted information layer mould pressing plate:
firstly, manufacturing a hidden pattern, placing the hidden pattern in a polar coordinate system, randomly extracting N (N is N x N) pixel points according to a system sampling method, wherein N is more than or equal to 4, respectively calculating the distance rho between each pixel point and the zero point of the coordinate system and the included angle theta, obtaining an N x N matrix according to the distance between each pixel point and the zero point of the coordinate system, and finally obtaining an empty-frequency gray-scale map matrix G; obtaining an n x n matrix according to an included angle between each pixel point and a zero point of a coordinate system, finally obtaining an angle gray-scale map matrix H, and completing plate making work of a laser encryption information layer mould pressing layer in a photoetching machine according to a space frequency gray-scale map matrix G and the angle gray-scale map matrix H to obtain a laser encryption information layer mould pressing plate;
(3) copying the laser encryption information on the PET imaging layer by using a molding press to form a laser encryption information layer;
(4) coating a copy layer on the laser encrypted information layer;
(5) printing the anti-counterfeiting characteristics of the image-text and the two-dimensional code on the copying layer to form a printing layer;
(6) printing gravure white ink on the printing layer surface by using a gravure press to form a gravure layer;
(7) coating a pressure-sensitive adhesive layer on the gravure layer by using a glue spreader and compounding the pressure-sensitive adhesive layer with the silicone oil paper layer;
(8) and (5) die-cutting the mark into single marks by using a die-cutting machine to obtain the mark.
The manufacturing method of the laser encryption information layer mould pressing plate comprises the following steps:
(1) according to the design file, making a hidden pattern, establishing a polar coordinate system, and placing the pattern at a zero point in the polar coordinate system;
(2) the resolution of the pattern is a b, the pattern is composed of a b pixel points, N (N is N) pixel points are randomly extracted according to a system sampling method, wherein N is more than or equal to 4, and a computer is used for calculating the coordinate value (x) of each pixel point1，y1)、(x2，y2)、(x3，y3)、……(xN，yN) And the distance (p) of each pixel point from the zero point1、ρ2、ρ3、……ρN)；
(3) Calculating the included angle (theta) between each pixel point and the zero point according to the polar coordinate system formula x ═ rho cos theta and y ═ rho cos theta1、θ1、θ1、……θN)；
(4) L is an observation distance and is a fixed parameter, β is a grating angle, d is a grating pitch, λ is a laser wavelength, β can be obtained from tan β ═ ρ/L, and a grating pitch d can be obtained from a grating equation sin β ═ λ/d, at which time a two-dimensional parameter (d) can be established for each grating lattice (d is a fixed parameter)1，θ1)、(d2，θ2)、(d3，θ3)……(dN，θN)；
(5) From the grating pitch d of the N grating lattices, a matrix can be obtained as follows:
d1，d2，……………………dn
dn+1，dn+2，………………d2*n
………………………………
dn*(n-1)+1，dn*(n-1)+2，……dn*n
calculating to obtain the maximum value d of dmaxAnd a minimum value dminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N d can be mapped to another matrix G composed of gray values, and the matrix G constitutes a gray map as follows:
G1，G2，……………………Gn
Gn+1，Gn+2，………………G2*n
………………………………
Gn*(n-1)+1，Gn*(n-1)+2，……Gn*n；
(6) from the angles θ of the N grating lattices, a matrix can be obtained as follows:
θ1，θ2，……………………θn
θn+1，θn+2，………………θ2*n
………………………………
θn*(n-1)+1，θn*(n-1)+2，……θn*n
calculating to obtain the maximum value theta of thetamaxAnd minimum value thetaminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N θ can be mapped to another matrix H composed of gray values, and the matrix constitutes a gray map as follows:
H1，H2，……………………Hn
Hn+1，Hn+2，………………H2*n
………………………………
Hn*(n-1)+1，Hn*(n-1)+2，……Hn*n；
(7) manufacturing an exposure unit according to the photoetching space frequency gray matrix G and the grating angle gray matrix H, wherein the size of the exposure unit is a square with the side length of n/R mm, R is the resolution of a photoetching image, and R is more than 10dpi and less than 50800 dpi;
(8) and (4) forming the exposure unit array in the step (7) into a designed size, manufacturing the exposure unit array on a photoetching offset plate through a photoetching process, and developing and electroplating to obtain the laser encryption information layer mould pressing plate.
According to the design file, a hidden pattern "0" as shown in fig. 2 is made, a polar coordinate system is established, and the pattern "0" is placed at the zero point in the polar coordinate system.
Selecting a pattern "0", extracting 16 points (N is 4 × 4) on the pattern, and generating 16 sampling points of the pattern by the computer, wherein the distances rho from the zero point are respectively as follows: 10. 12.5, 15.3, 17.9, 20, 17.9, 15.3, 12.5, 10, 12.5, 15.3, 17.9, 20, 17.9, 15.3, 12.5. The calculated theta angles are respectively: 0 °, 27 °, 53 °, 76 °, 90 °, 104 °, 127 °, 153 °, 180 °, 207 °, 233 °, 256 °, 270 °, 284 °, 307 °, 333 °. The maximum is 333 °, the minimum is 0 °, the value according to ρ, and the observation distance L, according to the grating angle formula β arctan ρ/L and the grating equation sin β λ/d, λ 650 × 10-9m, the grating pitch d can be obtained, and the 16 values of d are mapped to another matrix G composed of space-frequency gray values, which constitutes a gray map as follows:
0，64，135，204
255，204，135，64
0，64，135，204
255，204，135，64。
the gray-scale value matrix G corresponds to a gray-scale map as shown in fig. 3.
The 16 θ values are mapped to another matrix H of angle gray values, which forms a gray map as follows:
0，21，41，58
69，80，97，117
137，158，178，195
206，217，234，255。
the gray scale matrix H corresponds to a gray scale map as shown in fig. 4.
And manufacturing an exposure unit according to the photoetching space frequency gray matrix G and the grating angle gray matrix H, then forming an exposure unit array into a design size, manufacturing the exposure unit array on a photoetching offset plate through a photoetching process, and developing and electroplating to obtain the laser encryption information layer mould pressing plate containing the hidden pattern '0' information.
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (8)
1. A pointolite discernment laser encryption moulds membrane false proof mark which characterized in that: the printing and printing integrated digital code comprises a PET layer (1), an imaging layer (2), a laser encryption information layer (3), a copying layer (4), a printing layer (5), a gravure layer (6), a pressure-sensitive adhesive layer (7) and a silicone oil paper layer (8) which are sequentially connected from top to bottom, wherein digital coding information is hidden in the laser encryption information layer (3).
2. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the PET layer (1) is a single-side corona PET film with the thickness of 12-50 mu m.
3. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the PET layer (1) and the imaging layer (2) are inseparable.
4. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the replication layer (4) is UV gloss oil capable of replicating holographic patterns.
5. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the 90-degree peel strength between the copying layer (4) and the laser encryption information layer (3) is 0.0025-0.0060 kilonewton/meter.
6. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the thickness of the replication layer (4) is 4-6 μm.
7. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the hidden digital coding information pattern in the laser encryption information layer (3) is one or more than one of characters, letters, numbers, symbols or figures.
8. The point light source reading laser encryption plastic film anti-counterfeiting mark according to claim 1, characterized in that: the hidden digital coding information in the laser encryption information layer (3) is composed of a plurality of square grating lattice arrays, the processing mode is laser etching, and the grating lattices contain two parameters of grating space frequency and grating angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021085220.6U CN212010136U (en) | 2020-06-12 | 2020-06-12 | Point light source recognizing laser encrypted plastic film anti-counterfeiting mark |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021085220.6U CN212010136U (en) | 2020-06-12 | 2020-06-12 | Point light source recognizing laser encrypted plastic film anti-counterfeiting mark |
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| CN212010136U true CN212010136U (en) | 2020-11-24 |
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