CN212010135U - Point light source recognizing and reading laser encrypted paper anti-counterfeiting mark - Google Patents
Point light source recognizing and reading laser encrypted paper anti-counterfeiting mark Download PDFInfo
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Abstract
The utility model relates to an anti-fake technical product field, concretely relates to paper false proof mark is encrypted to pointolite recognition laser. The anti-counterfeiting mark comprises a laser encryption information layer, a copying layer, a composite adhesive layer, a printing layer, a paper layer, a pressure-sensitive adhesive layer and a silicone oil paper layer which are sequentially arranged from top to bottom, wherein the laser encryption information layer contains hidden information, and the hidden information is displayed under a point light source. The point light source reading laser encryption paper anti-counterfeiting mark is provided with the laser encryption information layer, a digital coding information grating structure is hidden in the laser encryption information layer, under natural light, encryption information is hidden, a handheld point light source device is used for irradiating the surface layer of the mark, hidden information is presented, a consumer judges the authenticity of the product by identifying the hidden information, and the consumer can conveniently inquire the authenticity; the encryption is carried out through a mathematical algorithm, so that the anti-counterfeiting strength is high, the anti-counterfeiting effect is not easy to crack and forge, and the imitation difficulty is increased.
Description
Technical Field
The utility model relates to an anti-fake technical product field, concretely relates to paper false proof mark is encrypted to pointolite recognition laser.
Background
At present, various commodity manufacturers use anti-counterfeiting marks for preventing self products from being counterfeited. The laser anti-counterfeiting mark is increasingly popularized and applied in fighting against counterfeit commodities, protecting the interests of consumers, protecting the interests of brand name, high-quality and special commodity producers and protecting the interests of various intellectual property rights.
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.
The Chinese patent discloses an anti-transfer anti-fake label with a laser holographic plastic film, in particular to an anti-transfer anti-fake label with a laser holographic plastic film, which is formed by molding laser holographic information on the plastic film. Comprises a base paper layer, a glue layer, a plastic film layer, a first gloss oil layer and a surface printing layer. However, the mark adopts common holographic anti-counterfeiting and is easy to crack and forge.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a point light source recognition laser encrypts paper false proof mark, contains the laser encryption information layer, and under the natural light, encrypted information hides, shines under the point light source equipment, presents hidden information, and the consumer of being convenient for inquires the true and false, and anti-fake dynamics is high, is difficult for being explain and forges.
The utility model discloses a realize through following technical scheme:
pointolite recognition laser encryption paper antifalsification label, including laser encryption information layer, duplication layer, compound glue film, printing layer, paper layer, pressure sensitive adhesive layer and the silicone oil paper layer that from the top down set gradually, laser encryption information layer contain hidden information, hidden information shows under the pointolite.
The laser encrypted information layer is internally hidden with digital coding information.
The laser encrypted information layer is formed by copy transfer.
The hidden information of the laser encryption information layer comprises one or more of characters, letters, numbers, symbols or figures.
The hidden information of the laser encryption information layer is composed of a plurality of square grating lattice arrays, the processing mode is laser etching, and grating lattices contain two parameters of grating space frequency and grating angle.
The laser encrypted information can not be observed under normal environment, can be observed under the irradiation of a flashlight on a mobile phone, and the observed holographic information is changed from small to large along with the distance between light sources.
The replication layer is UV gloss oil capable of replicating holographic patterns.
The thickness of the copying layer is 4-6 μm, the copying layer can be completely peeled off from the laser encryption information layer, and the peeling strength is 0.04-0.09 kN/m.
The grammage of the paper layer is 50-80 g/square meter.
The preparation method of the point light source reading laser encryption paper anti-counterfeiting mark comprises the following steps:
1) selecting a single-side corona PET base film with the thickness of 12-50 mu m, coating a permanent imaging layer on the corona surface, wherein the permanent imaging layer and the PET film cannot be separated;
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 onto the permanent imaging layer by using a molding press to form a laser encryption information layer;
4) coating UV gloss oil on the laser encryption information layer to form a duplication layer;
5) printing pictures and texts, two-dimensional codes and anti-counterfeiting features on the paper layer to form a printing layer;
6) compounding the PET base film with the processed copying layer and the printing layer by using composite glue, wherein the dry coating amount of the composite glue is 7-10 g/square meter, the drying temperature is 90-110 ℃, and the vehicle speed is 30-50 m/min;
7) after the composite is firm, peeling off the PET base film and the permanent imaging layer;
8) gluing the non-printing surface of the paper layer by using a gluing machine, and compounding the paper layer and the silicone oil paper together;
9) and die-cutting the individual marks by using a die-cutting machine.
Preferably, the manufacturing of the laser encrypted information layer molding plate specifically 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 x b, the pattern is composed of a x b pixel points in total, according to the methodThe system sampling method randomly extracts N (N is N x N) pixel points, 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.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. pointolite recognition laser encryption paper antifalsification label, be equipped with laser encryption information layer, hide digital coding information grating structure in the laser encryption information layer, under the natural light, encryption information hides, uses hand-held point light source equipment to shine the sign top layer, presents hidden information, and the consumer judges the product true and false through distinguishing hidden information, the consumer inquiry true and false of being convenient for.
2. The utility model discloses a mathematical algorithm encrypts, and anti-fake dynamics is high, is difficult for being explaind and forges, increases the imitation degree of difficulty.
3. The utility model discloses a new anti-fake characteristic makes the false proof mark have the exclusivity.
4. The utility model discloses utilize the transfer technology to realize laser holographic information on the paper substrate.
Drawings
FIG. 1 is a schematic view of the layer structure 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 laser encrypted information layer; 2. a replication layer; 3. compounding a glue layer; 4. printing layer; 5. a paper layer; 6. a pressure sensitive adhesive layer; 7. a silicone oil paper layer.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to the following examples.
The methods are conventional methods unless otherwise specified. The starting materials are commercially available from the open literature unless otherwise specified.
Example 1
Pointolite recognition laser encryption paper antifalsification label, including laser encryption information layer 1, duplication layer 2, compound glue film 3, printing layer 4, paper layer 5, pressure sensitive adhesive layer 6 and the silicone oil ply 7 that from the top down set gradually, laser encryption information layer 1 contain hidden information, hidden information shows under the pointolite.
The laser encrypted information layer 1 is internally hidden with digital coding information.
The replication layer 2 is UV gloss oil capable of replicating holographic patterns.
The thickness of the copying layer 2 is 5 mu m, the copying layer 2 can be completely stripped from the upper surface of the laser encryption information layer 1, and the stripping strength is 0.06 kilonewton/meter.
The paper layer 5 gram weight is 65 grams per square meter.
The preparation method of the point light source reading laser encryption paper anti-counterfeiting mark comprises the following steps:
1) selecting a single-side corona PET base film with the thickness of 35 mu m, and coating a permanent imaging layer on the corona surface, wherein the permanent imaging layer and the PET film cannot be separated;
2) manufacturing a laser encrypted information layer 1 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 1 mould pressing plate;
3) copying the laser encryption information onto the permanent imaging layer by using a molding press to form a laser encryption information layer 1;
4) coating UV gloss oil on the laser encryption information layer 1 to form a duplication layer 2;
5) printing pictures and texts, two-dimensional codes and anti-counterfeiting features on the paper layer 5 to form a printing layer 4;
6) compounding the PET base film with the processed replication layer 2 and the printing layer 4 by using composite glue, wherein the dry coating amount of the composite glue is 9 g/square meter, the drying temperature is 100 ℃, and the vehicle speed is 40 m/min;
7) after the composite is firm, peeling off the PET base film and the permanent imaging layer;
8) gluing the non-printing surface of the paper layer 5 by using a gluing machine, and compounding the paper layer and the silicone oil paper together;
9) and die-cutting the individual marks by using a die-cutting machine.
The manufacturing method of the laser encryption information layer 1 mould pressing plate specifically 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 1 mould pressing plate.
According to the design file, a hidden pattern "S" as shown in fig. 2 is made, a polar coordinate system is established, and the pattern "S" is placed at a zero point in the polar coordinate system.
Selecting a pattern "S", extracting 16 points (N is 4 × 4) on the pattern, and generating 16 sampling points of the pattern by the computer, wherein the distances ρ from the zero point to the 16 sampling points are respectively as follows: 10. 10, 7.2, 2.8, 7.2, 10. The calculated theta angles are respectively: 45 °, 60 °, 80 °, 100 °, 120 °, 135 °, 150 °, 330 °, 315 °, 300 °, 280 °, 260 °, 240 °, 225 °. The maximum value is 330 ° and the minimum value is 45 °. Depending on the value of ρ and the observation distance L, 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 consisting of gray values, which matrix constitutes a gray map as follows:
255，255，255，255
255，255，156，0
0，156，255，255
255，255，255，255。
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:
0，13，31，49
67，80，94，94
255，255，241，228
210，192，175，161。
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 hidden pattern 'S' 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 paper false proof mark which characterized in that: the laser paper comprises a laser encryption information layer (1), a copying layer (2), a composite adhesive layer (3), a printing layer (4), a paper layer (5), a pressure-sensitive adhesive layer (6) and a silicone oil paper layer (7), wherein the laser encryption information layer (1) comprises hidden information, and the hidden information appears under a point light source.
2. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the laser encrypted information layer (1) is internally hidden with digital coding information.
3. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the laser encrypted information layer (1) is formed by copy transfer.
4. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the hidden information of the laser encryption information layer (1) comprises characters, letters, numbers, symbols or figures.
5. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the hidden information of the laser encryption information layer (1) is composed of a plurality of square grating lattice arrays, the processing mode is laser etching, and grating lattices contain two parameters of grating space frequency and grating angle.
6. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the replication layer (2) is UV gloss oil capable of replicating holographic patterns.
7. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the thickness of the replication layer (2) is 4-6 μm; the copy layer (2) can be completely peeled off from the laser-encrypted information layer (1) and the peel strength is 0.04-0.09 kN/m.
8. The point light source reading laser encryption paper anti-counterfeiting mark according to claim 1, characterized in that: the gram weight of the paper layer (5) is 50-80 g/square meter.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114120799A (en) * | 2021-12-07 | 2022-03-01 | 深圳永丰吉科技有限公司 | Holographic anti-counterfeiting label pasting film with invisible effect and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114120799A (en) * | 2021-12-07 | 2022-03-01 | 深圳永丰吉科技有限公司 | Holographic anti-counterfeiting label pasting film with invisible effect and manufacturing method thereof |
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