Anti-counterfeiting element, preparation method thereof, authenticity detection method and detection device

Abstract

The invention provides an anti-counterfeiting element, a preparation method thereof, an authenticity detection method and a detection device. The anti-counterfeiting element comprises a base material; the photosensitive information layer is arranged on the lower surface of the base material and can present photosensitive information under the irradiation of the polarized light; the groove layer is arranged on the lower surface of the photosensitive information layer, a micro groove is formed in the groove layer, the micro groove is filled with a fluorescent material, and the fluorescent material can present fluorescent information under the irradiation of fluorescent light; wherein the photosensitive information and the fluorescent information are used as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element. The micro-information array layer and the groove layer are arranged on the lower surface of the photosensitive information layer in parallel; the photosensitive information layer comprises a light orientation layer, an image reflecting layer and an angle-dependent color changing layer; and the groove layer and the micro-information array layer are arranged below the angle-dependent color changing layer. According to the anti-counterfeiting element, the groove layer is arranged, so that fluorescence information can be generated under the irradiation of fluorescence, and the anti-counterfeiting element can be determined to be true only when the photosensitive information and the fluorescence information conform to preset correct information.

Description

[0001] This application is a divisional application of Chinese patent application filed on September 6, 2022, with application number "202211095489.6" and invention title "Anti-counterfeiting element and its preparation method, authenticity detection method and detection device". Technical Field

[0002] This application belongs to the field of anti-counterfeiting technology, specifically, it relates to an anti-counterfeiting element and its preparation method, authenticity detection method and detection device. Background Technology

[0003] Currently, traditional anti-counterfeiting components typically have luminescent materials on their surface. When exposed to excitation light or radio waves, these materials emit light and generate anti-counterfeiting information. This anti-counterfeiting information is usually specific and unchangeable, which reduces the difficulty of copying. At the same time, the method of generating anti-counterfeiting information by irradiating the anti-counterfeiting component with excitation light or radio waves is also quite common and easily copied by criminals.

[0004] Therefore, in order to reduce the risk of being copied and improve the concealment of anti-counterfeiting components, providing an anti-counterfeiting component that can comprehensively identify authenticity through multiple methods has become an urgent problem to be solved. Summary of the Invention

[0005] The present invention aims to solve or improve at least one of the above-mentioned technical problems.

[0006] The first aspect of the present invention is to provide an anti-counterfeiting element.

[0007] A second aspect of the present invention is to provide a method for preparing an anti-counterfeiting element.

[0008] A third aspect of the present invention is to provide a method for detecting the authenticity of anti-counterfeiting elements.

[0009] A fourth aspect of the present invention is to provide a device for detecting the authenticity of anti-counterfeiting elements.

[0010] The first aspect of the present invention provides an anti-counterfeiting element, comprising: a substrate; a photosensitive information layer disposed on the lower surface of the substrate, capable of displaying photosensitive information under polarized light irradiation; and a trench layer disposed on the lower surface of the photosensitive information layer, wherein microgrooves are provided on the trench layer, and fluorescent material is filled in the microgrooves, the fluorescent material being capable of displaying fluorescent information under fluorescent irradiation; wherein the photosensitive information and the fluorescent information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element.

[0011] The anti-counterfeiting element provided by this invention includes a substrate, a photosensitive information layer, and a trench layer. The photosensitive information layer is disposed on the lower surface of the substrate and can display photosensitive information under polarized light irradiation. The trench layer is disposed on the lower surface of the photosensitive information layer and has microgrooves filled with fluorescent material. The fluorescent material can display fluorescent information under fluorescent irradiation. The photosensitive information and fluorescent information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element. The anti-counterfeiting element of this application, with its photosensitive information layer and trench layer, allows for the display of hidden photosensitive information under polarized light irradiation. The trench layer also enables the generation of fluorescent information under fluorescent irradiation. Since both the photosensitive information and the fluorescent information serve as anti-counterfeiting information, the anti-counterfeiting element can only be confirmed as genuine if both meet the preset correct information. This allows this application to identify the authenticity of the anti-counterfeiting element through multiple methods, solving the problem that existing anti-counterfeiting elements can only rely on a single identification method, making them easy to copy. Of course, depending on the needs, the trench layer can also be set on the lower surface of the substrate, that is, the trench layer and the photosensitive information layer are set on the same plane, both located below the substrate.

[0012] In the above technical solution, the anti-counterfeiting element also includes: a microlens array layer, which is disposed on the upper surface of the substrate and includes a plurality of microlenses arranged in an array. The microlenses are capable of amplifying photosensitive information and fluorescence information.

[0013] In this technical solution, the anti-counterfeiting element also includes a microlens array layer, which is disposed on the upper surface of the substrate and includes several microlenses arranged in an array. The microlenses can amplify the photosensitive information and the fluorescence information, making the photosensitive information and the fluorescence information easier to observe, thereby improving the detection efficiency of the anti-counterfeiting element.

[0014] In the above technical solution, the anti-counterfeiting element further includes: a micro-information array layer, which is disposed on the lower surface of the photosensitive information layer in parallel with the trench layer. The micro-information array layer includes at least one of a coating adhesive, silver ink, and black ink. At least one of the coating adhesive, silver ink, and black ink can present micro-information under natural light.

[0015] In this technical solution, the anti-counterfeiting element also includes a micro-information array layer, which is disposed parallel to the trench layer on the lower surface of the photosensitive information layer. The micro-information array layer includes at least one of a coating adhesive, silver ink, and black ink. Under natural light, at least one of the coating adhesive, silver ink, and black ink can display micro-information. By setting the micro-information array layer, the micro-information can serve as another anti-counterfeiting information during the authenticity detection process. That is, the anti-counterfeiting element can only be determined to be genuine when the photosensitive information, fluorescent information, and micro-information all meet the standard information. By using all three types of information to jointly determine the authenticity of the anti-counterfeiting element, the difficulty of copying the anti-counterfeiting element is greatly increased. In addition, the micro-information array layer is not limited to being disposed parallel to the trench layer on the lower surface of the photosensitive information layer; it can also be disposed below the trench layer, or below the substrate, or on the same plane as the photosensitive information layer, etc.

[0016] In the above technical solution, photosensitive information includes one or more of image information and digital information, fluorescence information includes one or more of image information and digital information, and micro information includes one or more of image information and digital information.

[0017] In this technical solution, photosensitive information includes one or more of image information and digital information; fluorescent information includes one or more of image information and digital information; and micro-information includes one or more of image information and digital information. This allows anti-counterfeiting information to be presented in multiple ways, with one presentation method chosen as the standard information, thus greatly increasing the difficulty for anti-counterfeiting components to be copied.

[0018] In the above technical solution, when the photosensitive information, fluorescence information and micro information all include image information, the image of the photosensitive information and fluorescence information is consistent with or partially consistent with the image of the micro information, or the photosensitive information and fluorescence information and the micro information form a complete image; when the photosensitive information, fluorescence information and micro information all include digital information, the photosensitive information and fluorescence information are in a preset multiple relationship, and the micro information and fluorescence information are in a preset multiple relationship.

[0019] In this technical solution, when the photosensitive information, fluorescent information, and micro-information all include image information, the images of the photosensitive information and fluorescent information are identical or partially identical to those of the micro-information. That is, when the anti-counterfeiting element is illuminated by polarized light, ultraviolet light, and natural light, the images presented by the photosensitive information, fluorescent information, and micro-information are identical or partially identical. For example, the images of the photosensitive information, fluorescent information, and micro-information are all the same lion, or they all contain the same lion head. Of course, as needed, the photosensitive information, fluorescent information, and micro-information can also be made to form a complete image, such as a lion. When the photosensitive information, fluorescent information, and micro-information all include digital information, the photosensitive information and fluorescent information are in a preset multiple relationship, and the micro-information and fluorescent information are in a preset multiple relationship. By setting the photosensitive information, fluorescent information, and micro-information in a multiple relationship, the difficulty of copying the anti-counterfeiting element can be further increased.

[0020] In the above technical solution, the photosensitive information layer includes: a photoalignment layer disposed on the lower surface of the substrate, composed of a photosensitive alignment material, wherein the photosensitive alignment material molecules on the photoalignment layer include multiple sets of first-alignment molecules arranged along a first direction and multiple sets of second-alignment molecules arranged along a second direction, the first direction and the second direction being perpendicular to each other, and each set of first-alignment molecules and second-alignment molecules being correspondingly arranged; and an image reflection layer disposed on the lower surface of the photoalignment layer, composed of a nematic liquid crystal material, wherein the arrangement of the nematic liquid crystal material molecules on the image reflection layer is the same as the arrangement of the photosensitive alignment material molecules on the photoalignment layer, and under the irradiation of polarized light in the first direction and the second direction respectively, the image reflection layer can sequentially reflect different photosensitive information.

[0021] In this technical solution, the photosensitive information layer includes a photoalignment layer disposed on the lower surface of the substrate, composed of a photosensitive alignment material. The photosensitive alignment material molecules on the photoalignment layer are subjected to bidirectional polarized ultraviolet exposure in two mutually perpendicular directions under the cover of a mask with a micro-pattern array. The photosensitive alignment material molecules can be arranged in two mutually perpendicular directions, including multiple groups of first-alignment molecules arranged along the first direction and multiple groups of second-alignment molecules arranged along the second direction. The first and second directions are mutually perpendicular, and each group of first-alignment molecules and second-alignment molecules are correspondingly arranged. The image reflection layer is disposed on the lower surface of the photoalignment layer and is composed of a nematic liquid crystal material. The arrangement of the nematic liquid crystal material molecules on the image reflection layer is the same as the arrangement of the photosensitive alignment material molecules on the photoalignment layer. Thus, under the sequential irradiation of polarized light in the first and second directions, the image reflection layer can sequentially reflect different photosensitive information.

[0022] In the above technical solution, the photosensitive information layer also includes: an angle-dependent color-changing layer, which is disposed on the lower surface of the image reflective layer and is composed of cholesteric liquid crystal material, capable of reflecting light of different wavelengths as the viewing angle changes.

[0023] In this technical solution, the photosensitive information layer also includes an angle-dependent color-changing layer, disposed on the lower surface of the image reflective layer. This layer, composed of cholesteric liquid crystal material, reflects light of different wavelengths as the viewing angle changes. Thus, during the authenticity verification process, the viewing angle can be changed to observe whether the photosensitive information changes color, thereby increasing the difficulty of copying the anti-counterfeiting element. Furthermore, the trench layer and the micro-information array layer can be disposed below the angle-dependent color-changing layer.

[0024] The second aspect of this application provides a method for preparing an anti-counterfeiting element, used to prepare the anti-counterfeiting element provided by any of the technical solutions of the first aspect of this application. The method for preparing the anti-counterfeiting element includes the following steps: coating a photosensitive alignment material under a substrate; generating a light-blocking area and a light-leaking area on a mask by photolithography, printing, or inkjet printing to form a mask with a micro-pattern array; under the cover of the mask with the micro-pattern array, sequentially performing bidirectional polarized ultraviolet exposure on the photosensitive alignment material molecules in two mutually perpendicular directions, or using polarized ultraviolet laser, polarized ultraviolet light projection, etc., to irradiate the photosensitive alignment material molecules bidirectionally. Directional irradiation causes the molecules of the photosensitive alignment material to align in two mutually perpendicular directions, forming a photoalignment layer after drying. A nematic liquid crystal material is coated below the photoalignment layer. The molecules of the nematic liquid crystal material, facilitated by the photosensitive alignment material molecules, align in the same way as the photosensitive alignment material molecules. After drying and curing, an image reflection layer is formed. The photosensitive information layer includes both the photoalignment layer and the image reflection layer. An adhesive is applied to the lower surface of the photosensitive information layer by printing or coating, and cured to form an adhesive layer. Microgrooves are then formed on the surface of the adhesive layer using photolithography or nanoimprinting. Fluorescent material is then filled into the microgrooves by a scraping process to form a trench layer.

[0025] The method for preparing the anti-counterfeiting element provided by the present invention is the same as the method for preparing the anti-counterfeiting element provided by the first aspect of the present invention. Therefore, the method for preparing the anti-counterfeiting element provided by the present invention has all the beneficial effects of the anti-counterfeiting element provided by any of the technical solutions of the first aspect of the present application, which will not be elaborated here.

[0026] In the above technical solution, the method for preparing anti-counterfeiting elements further includes: printing a microlens structure on a substrate and curing the microlens structure to form a microlens array layer; or coating an imprinting adhesive layer on a substrate and using an imprinting plate with a microlens array pattern to mold and cure the imprinting adhesive layer to form a microlens array layer.

[0027] In this technical solution, a microlens structure is printed on the substrate, and the microlens structure is cured to form a microlens array layer. Alternatively, an imprinting adhesive layer can be coated on the substrate, and an imprinting plate with a microlens array pattern can be used to mold and cure the imprinting adhesive layer to form a microlens array layer. In this way, the photosensitive and fluorescent information can be amplified through the microlenses, making the photosensitive and fluorescent information easier to observe and improving the detection efficiency of anti-counterfeiting components.

[0028] In the above technical solution, the method for preparing the anti-counterfeiting element further includes: coating at least one of adhesive, silver ink, and black ink under the image reflective layer, and then etching at least one of adhesive, silver ink, and black ink by laser etching or electron beam etching to form a micro-information array layer.

[0029] In this technical solution, at least one of adhesive, silver ink, and black ink is coated beneath the image reflective layer. Then, laser etching or electron beam etching is used to etch at least one of the adhesive, silver ink, and black ink to form a micro-information array layer. By setting up this micro-information array layer, the micro-information can serve as another anti-counterfeiting measure during the authenticity detection process. That is, the anti-counterfeiting element can only be considered genuine when the photosensitive information, fluorescent information, and micro-information all conform to the standard information. By using these three types of information to jointly determine the authenticity of the anti-counterfeiting element, the difficulty of copying the anti-counterfeiting element is greatly increased.

[0030] In the above technical solution, the process of preparing the photosensitive information layer also includes coating the lower surface of the image reflective layer with a cholesteric liquid crystal material, and forming an angle-dependent color-changing layer after drying and curing. The photosensitive information layer also includes the angle-dependent color-changing layer.

[0031] In this technical solution, a cholesteric liquid crystal material is coated on the lower surface of the image reflective layer. After drying and curing, an angle-dependent color-changing layer is formed. The angle-dependent color-changing layer, the light alignment layer, and the image reflective layer together constitute the photosensitive information layer. This allows for observation of color changes in the photosensitive information during authenticity verification by altering the viewing angle, thereby increasing the difficulty of copying the anti-counterfeiting element. Furthermore, since the trench layer and the micro-information array layer are both located below the angle-dependent color-changing layer, the colors of the fluorescent information and micro-information also change with the viewing angle.

[0032] The third aspect of the present invention provides a method for detecting the authenticity of anti-counterfeiting elements, used for detecting the authenticity of anti-counterfeiting elements as described in any of the first aspects of this application. The method for detecting the authenticity of anti-counterfeiting elements includes the following steps: using a polarized light generator to emit polarized light to irradiate the anti-counterfeiting element and obtain the photosensitive information presented by the anti-counterfeiting element; using a fluorescence generator to irradiate the anti-counterfeiting element and obtain the fluorescence information presented by the anti-counterfeiting element; and judging the authenticity of the anti-counterfeiting element based on the photosensitive information and the fluorescence information, wherein the photosensitive information includes digital information and image information, and the fluorescence information includes digital information and image information.

[0033] The method for detecting the authenticity of anti-counterfeiting elements provided in this application is used to detect the anti-counterfeiting elements of any one of the first aspects of this application. Therefore, the method for detecting the authenticity of anti-counterfeiting elements in this application has all the beneficial effects of the anti-counterfeiting elements of the first aspect of this application, which will not be repeated here.

[0034] In the above technical solution, when both photosensitive information and fluorescence information are digital information, the step of determining the authenticity of the anti-counterfeiting element based on the photosensitive information and fluorescence information specifically includes: calculating the multiple relationship between the photosensitive information and fluorescence information; determining the authenticity of the anti-counterfeiting element based on the multiple relationship between the photosensitive information and fluorescence information; when both photosensitive information and fluorescence information are image information, the step of determining the authenticity of the anti-counterfeiting element based on the photosensitive information and fluorescence information specifically includes: when the photosensitive information and fluorescence information are consistent or at least partially consistent, or when the photosensitive information and fluorescence information form a complete preset image, the anti-counterfeiting element is determined to be genuine; otherwise, it is counterfeit.

[0035] In this technical solution, when both the photosensitive and fluorescent information are digital, the ratio between the photosensitive and fluorescent information can be calculated first. Then, the authenticity of the anti-counterfeiting element is determined based on this ratio. That is, the anti-counterfeiting element is considered genuine only if the ratio matches a standard ratio. Setting the photosensitive and fluorescent information to a ratio further increases the difficulty of copying the anti-counterfeiting element. When both the photosensitive and fluorescent information are image information, the anti-counterfeiting element is considered genuine if it is identical or at least partially identical, or if it forms a complete preset image; otherwise, it is counterfeit.

[0036] In the above technical solution, the anti-counterfeiting element also includes a micro-information array layer. The micro-information array layer can present micro-information under natural light. The method for detecting the authenticity of the anti-counterfeiting element also includes: acquiring the micro-information presented by the anti-counterfeiting element under natural light; when the photosensitive information, fluorescent information, and micro-information are all digital information, determining the authenticity of the anti-counterfeiting element based on the photosensitive information and fluorescent information, specifically including: calculating the multiple relationship between the photosensitive information and fluorescent information; calculating the multiple relationship between the micro-information and fluorescent information; determining the authenticity of the anti-counterfeiting element based on the multiple relationship between the photosensitive information and fluorescent information, and the multiple relationship between the micro-information and fluorescent information; when the photosensitive information, fluorescent information, and micro-information are all image information, determining the authenticity of the anti-counterfeiting element based on the photosensitive information and fluorescent information, specifically including: when the photosensitive information, fluorescent information, and micro-information are consistent or at least partially consistent, or when the image of the photosensitive information, fluorescent information, and micro-information forms a complete image, the anti-counterfeiting element is determined to be genuine; otherwise, it is counterfeit.

[0037] In this technical solution, the anti-counterfeiting element also includes a micro-information array layer. This micro-information array layer can display micro-information under natural light. The method for detecting the authenticity of the anti-counterfeiting element further includes: illuminating the anti-counterfeiting element with natural light to obtain the micro-information displayed by the element. Thus, when determining the authenticity of the anti-counterfeiting element, and when the photosensitive information, fluorescent information, and micro-information are all digital information, the ratio between the photosensitive information and the fluorescent information is first calculated, then the ratio between the micro-information and the fluorescent information is calculated. Finally, the anti-counterfeiting is determined based on the ratios of these ratios. The authenticity of an anti-counterfeiting element is determined only when the ratios between photosensitive information and fluorescent information, and between micro-information and fluorescent information, meet the standards. When the photosensitive information, fluorescent information, and micro-information are all image information, it can be determined whether the images of the photosensitive information, fluorescent information, and micro-information are consistent, partially consistent, or can form a complete image. When the photosensitive information, fluorescent information, and micro-information are consistent or at least partially consistent, or when the images of the photosensitive information, fluorescent information, and micro-information form a complete image, the anti-counterfeiting element is determined to be genuine; otherwise, it is counterfeit.

[0038] The fourth aspect of the present invention provides a device for detecting the authenticity of anti-counterfeiting elements, comprising: a polarized light generating device for emitting polarized light; a fluorescence generating device for emitting fluorescence; an image acquiring device for acquiring an image; and a processing unit including a storage device and a processor, wherein the storage device stores a computer program, and the processor executes the program to implement the method for detecting the authenticity of any one of the technical solutions of the third aspect of the present application.

[0039] The device for detecting the authenticity of anti-counterfeiting elements provided in this application can realize the method for detecting the authenticity of anti-counterfeiting elements in the third aspect of this application. Therefore, the device for detecting the authenticity of anti-counterfeiting elements in this application has all the beneficial effects of the method for detecting the authenticity of anti-counterfeiting elements in any of the technical solutions in the third aspect of this application, which will not be repeated here.

[0040] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0041] The above and / or additional aspects and advantages of embodiments of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0042] Figure 1A A schematic diagram of the structure of the anti-counterfeiting element provided in an embodiment of the present invention is shown;

[0043] Figure 1B An enlarged structural view of the groove layer portion of the anti-counterfeiting element provided in an embodiment of the present invention is shown;

[0044] Figure 2 A schematic flowchart of the method for preparing anti-counterfeiting elements provided in an embodiment of the present invention is shown;

[0045] Figure 3 A schematic flowchart of the method for detecting the authenticity of anti-counterfeiting elements provided in an embodiment of the present invention is shown;

[0046] Figure 4 A schematic diagram of another anti-counterfeiting element provided in an embodiment of the present invention is shown;

[0047] Figure 5 A flowchart illustrating a method for preparing an anti-counterfeiting element according to another embodiment of the present invention is shown;

[0048] Figure 6 A schematic flowchart of a method for detecting the authenticity of an anti-counterfeiting element provided in another embodiment of the present invention is shown;

[0049] Figure 7 A flowchart illustrating a method for preparing an anti-counterfeiting element according to another embodiment of the present invention is shown;

[0050] Figure 8 A schematic flowchart of a method for detecting the authenticity of an anti-counterfeiting element provided in another embodiment of the present invention is shown;

[0051] Figure 9 A schematic diagram of the structure of the anti-counterfeiting element authenticity detection device provided in an embodiment of the present invention is shown.

[0052] in, Figure 1A , Figure 1B , Figure 4 and Figure 9 The correspondence between component names and their designations is as follows:

[0053] 1 Anti-counterfeiting element, 11 Substrate, 12 Microlens array layer, 122 Microlens, 13 Photosensitive information layer, 132 Light orientation layer, 134 Image reflection layer, 136 Angle-dependent color-changing layer, 14 Groove layer, 142 Microgroove, 15 Micro-information array layer, 16 Fluorescent material, 2 Authenticity detection device, 22 Polarized light generator, 24 Processing unit, 26 Image acquisition device, 28 Fluorescence generator. Detailed Implementation

[0054] To better understand the above aspects, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0055] Many specific details are set forth in the following description in order to provide a full understanding of the embodiments of the present invention. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the protection provided by the embodiments of the present invention is not limited to the specific embodiments disclosed below.

[0056] Example 1

[0057] like Figure 1A and Figure 1B As shown, this embodiment provides an anti-counterfeiting element 1 including a substrate 11, a photosensitive information layer 13, and a trench layer 14. The photosensitive information layer 13 is disposed on the lower surface of the substrate 11 and can present photosensitive information under polarized light irradiation. The trench layer 14 is disposed on the lower surface of the photosensitive information layer 13, and microgrooves 142 are provided on the trench layer 14. The microgrooves 142 are filled with fluorescent material 16, and the fluorescent material 16 can present fluorescent information under fluorescent irradiation. The photosensitive information and fluorescent information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element 1.

[0058] The anti-counterfeiting element 1 provided by the present invention includes a substrate 11, a photosensitive information layer 13, and a trench layer 14. The photosensitive information layer 13 is disposed on the lower surface of the substrate 11 and can present photosensitive information under polarized light irradiation. The trench layer 14 is disposed on the lower surface of the photosensitive information layer 13, and microgrooves 142 are provided on the trench layer 14. The microgrooves 142 are filled with fluorescent material 16, and the fluorescent material 16 can present fluorescent information under fluorescent irradiation. The photosensitive information and the fluorescent information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element 1. The anti-counterfeiting element 1 of this application is provided with a photosensitive information layer 13 and a groove layer 14, which can reveal hidden photosensitive information under polarized light irradiation. By providing the groove layer 14, fluorescent information can be generated under fluorescent irradiation. The photosensitive information and the fluorescent information serve as anti-counterfeiting information. That is, only when both the photosensitive information and the fluorescent information meet the preset correct information can the anti-counterfeiting element 1 be determined to be genuine. In this way, this application can identify the authenticity of the anti-counterfeiting element 1 through multiple methods, solving the problem that the existing anti-counterfeiting element 1 can only be identified by a single method, which makes the anti-counterfeiting element 1 easy to copy.

[0059] In the above embodiments, the anti-counterfeiting element 1 further includes: a microlens array layer 12 disposed on the upper surface of the substrate 11, comprising a plurality of microlenses 122 arranged in an array, wherein the microlenses 122 are capable of amplifying photosensitive information and fluorescence information.

[0060] In this embodiment, the anti-counterfeiting element 1 further includes a microlens array layer 12 disposed on the upper surface of the substrate 11, comprising a plurality of microlenses 122 arranged in an array. The microlenses 122 can amplify photosensitive and fluorescent information, making the photosensitive and fluorescent information easier to observe and improving the detection efficiency of the anti-counterfeiting element 1. Furthermore, the arrangement period of the microlenses 122 is the same as the arrangement period of the fluorescent material 16, which ensures the maximum amplification effect of the fluorescent information.

[0061] In the above embodiments, the photosensitive information includes one or more of image information and digital information, and the fluorescence information includes one or more of image information and digital information.

[0062] In this embodiment, the photosensitive information includes one or more of image information and digital information, and the fluorescent information includes one or more of image information and digital information. This allows the anti-counterfeiting information to be presented in multiple ways, with one presentation method chosen as the standard information, thus greatly increasing the difficulty of copying the anti-counterfeiting element 1. Furthermore, a combination of image information and digital information can also be used. This combination of methods significantly increases the difficulty of copying the anti-counterfeiting element compared to a single form of anti-counterfeiting information.

[0063] In the above embodiments, when both photosensitive information and fluorescence information include image information, the images of photosensitive information and fluorescence information are identical or partially identical, or the photosensitive information and fluorescence information form a complete image; when both photosensitive information and fluorescence information include digital information, the photosensitive information and fluorescence information are in a preset multiple relationship.

[0064] In this embodiment, when both the photosensitive information and the fluorescent information include image information, the images of the photosensitive information and the fluorescent information are identical or partially identical. That is, when the anti-counterfeiting element 1 is illuminated by both polarized light and ultraviolet light, the images presented by the photosensitive information and the fluorescent information are identical or partially identical. For example, the images of the photosensitive information and the fluorescent information are both the same lion, or both contain the same lion head, etc. Of course, as needed, the photosensitive information and the fluorescent information can also be made to form a complete image, such as together forming a lion. When both the photosensitive information and the fluorescent information include digital information, the photosensitive information and the fluorescent information are in a preset multiple relationship. By setting the photosensitive information and the fluorescent information to a multiple relationship, the difficulty of copying the anti-counterfeiting element 1 can be further increased.

[0065] In the above embodiments, the photosensitive information layer 13 includes: a photoalignment layer 132 disposed on the lower surface of the substrate 11, composed of a photosensitive alignment material, wherein the photosensitive alignment material molecules on the photoalignment layer 132 include multiple sets of first-alignment molecules arranged along a first direction and multiple sets of second-alignment molecules arranged along a second direction, the first direction and the second direction being perpendicular to each other, and each set of first-alignment molecules and second-alignment molecules being correspondingly arranged; and an image reflection layer 134 disposed on the lower surface of the photoalignment layer 132, composed of a nematic liquid crystal material, wherein the arrangement of the nematic liquid crystal material molecules on the image reflection layer 134 is the same as the arrangement of the photosensitive alignment material molecules on the photoalignment layer 132, and under the irradiation of polarized light in the first direction and the second direction respectively, the image reflection layer 134 can sequentially reflect different photosensitive information.

[0066] In this embodiment, the photosensitive information layer 13 includes a photoalignment layer 132 disposed on the lower surface of the substrate 11, composed of a photosensitive alignment material. The photosensitive alignment material molecules on the photoalignment layer 132 are subjected to bidirectional polarized ultraviolet exposure in two mutually perpendicular directions under the cover of a mask with a micro-pattern array. The photosensitive alignment material molecules can be arranged in two mutually perpendicular directions, including multiple groups of first-alignment molecules arranged along the first direction and multiple groups of second-alignment molecules arranged along the second direction. The first and second directions are mutually perpendicular, and each group of first-alignment molecules and second-alignment molecules are correspondingly arranged. The image reflection layer 134 is disposed on the lower surface of the photoalignment layer 132, composed of a nematic liquid crystal material. The arrangement of the nematic liquid crystal material molecules on the image reflection layer 134 is the same as the arrangement of the photosensitive alignment material molecules on the photoalignment layer 132. Thus, under the sequential irradiation of polarized light in the first and second directions, the image reflection layer 134 can sequentially reflect different photosensitive information.

[0067] In the above embodiments, the photosensitive information layer 13 further includes an angle-dependent color-changing layer 136 disposed on the lower surface of the image reflective layer 134, composed of cholesteric liquid crystal material, which can reflect light of different wavelengths as the viewing angle changes.

[0068] In this embodiment, the photosensitive information layer 13 also includes an angle-dependent color-changing layer 136 disposed on the lower surface of the image reflective layer 134. It is composed of cholesteric liquid crystal material and can reflect light of different wavelengths as the viewing angle changes. In this way, during the authenticity verification process, the viewing angle can be changed to observe whether the photosensitive information changes color, thereby increasing the difficulty for the anti-counterfeiting element 1 to be copied.

[0069] like Figure 2 As shown, the method for preparing the anti-counterfeiting element in this embodiment includes the following steps:

[0070] S202: A photosensitive alignment material is coated under a substrate. Light-blocking and light-leaking areas are created on a mask using photolithography, printing, or inkjet printing, forming a mask with a micro-pattern array. Under the cover of this mask, the photosensitive alignment material molecules are sequentially irradiated bidirectionally by polarized ultraviolet exposure in two mutually perpendicular directions, or by using polarized ultraviolet laser or polarized ultraviolet light projection, causing the photosensitive alignment material molecules to align in two mutually perpendicular directions. After drying, a photoalignment layer is formed. A nematic liquid crystal material is coated under the photoalignment layer. The nematic liquid crystal material molecules, promoted by the photosensitive alignment material molecules, align in the same way as the photosensitive alignment material molecules. After drying and curing, an image reflection layer is formed. The photosensitive information layer includes both the photoalignment layer and the image reflection layer.

[0071] S204: Cholesteric liquid crystal material is coated on the lower surface of the image reflective layer, and after drying and curing, an angle-dependent color-changing layer is formed.

[0072] S206: By printing or coating, an adhesive is applied to the lower surface of the angle-sensitive color-changing layer, cured to form an adhesive layer, and then microgrooves are formed on the surface of the adhesive layer by photolithography or nanoimprinting. Fluorescent material is then filled into the microgrooves by scraping to form a groove layer.

[0073] S208: Print a microlens structure on a substrate and cure the microlens structure to form a microlens array layer; or apply an imprinting adhesive layer on a substrate and use an imprinting plate with a microlens array pattern to mold and cure the imprinting adhesive layer to form a microlens array layer.

[0074] like Figure 3 As shown, the method for detecting the authenticity of anti-counterfeiting elements provided in this embodiment includes the following steps:

[0075] S302: Use a polarized light generator to emit polarized light to illuminate the anti-counterfeiting element and obtain the photosensitive information presented by the anti-counterfeiting element;

[0076] S304: Use a fluorescence generator to irradiate the anti-counterfeiting element and obtain the fluorescence information presented by the anti-counterfeiting element;

[0077] S306: The authenticity of anti-counterfeiting elements is determined based on photosensitive information and fluorescent information, wherein the photosensitive information includes digital information and image information, and the fluorescent information includes digital information and image information.

[0078] Specifically, when both photosensitive and fluorescent information are digital, the ratio between them can be calculated first. Then, the authenticity of the anti-counterfeiting element is determined based on this ratio. That is, the anti-counterfeiting element is considered genuine only if the ratio matches a standard ratio. Setting the photosensitive and fluorescent information to a multiple relationship further increases the difficulty of copying the anti-counterfeiting element. When both photosensitive and fluorescent information are image information, the anti-counterfeiting element is considered genuine if it is identical or at least partially identical, or if it forms a complete preset image; otherwise, it is counterfeit.

[0079] In addition, a micro-information array layer 15 can be used instead of the trench layer 14 on the anti-counterfeiting element. Specifically:

[0080] like Figure 4As shown, the anti-counterfeiting element 1 includes a substrate 11, a photosensitive information layer 13, and a micro-information array layer 15. The photosensitive information layer 13 is disposed on the lower surface of the substrate 11 and can present photosensitive information under polarized light irradiation. The micro-information array layer 15 is disposed on the lower surface of the photosensitive information layer 13 and includes at least one of a coating adhesive, silver ink, and black ink. At least one of the coating adhesive, silver ink, and black ink can present micro-information under natural light irradiation. The photosensitive information and micro-information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element 1.

[0081] like Figure 5 As shown, the preparation method of this anti-counterfeiting element includes the following steps:

[0082] S502: A photosensitive alignment material is coated under a substrate. Light-blocking and light-leaking areas are created on a mask using photolithography, printing, or inkjet printing, forming a mask with a micro-pattern array. Under the cover of this mask, the photosensitive alignment material molecules are bidirectionally irradiated by polarized ultraviolet exposure in two mutually perpendicular directions, or by using polarized ultraviolet laser or polarized ultraviolet light projection, causing the photosensitive alignment material molecules to align in two mutually perpendicular directions. After drying, a photoalignment layer is formed. A nematic liquid crystal material is coated under the photoalignment layer. The nematic liquid crystal material molecules are aligned in the same way as the photosensitive alignment material molecules under the guidance of the photosensitive alignment material molecules. After drying and curing, an image reflection layer is formed. The photosensitive information layer includes both the photoalignment layer and the image reflection layer.

[0083] S504: A cholesteric phase liquid crystal material is coated on the lower surface of the image reflective layer, and after drying and curing, an angle-dependent color-changing layer is formed.

[0084] S506: At least one of adhesive, silver ink, and black ink is coated below the corner-dependent color-changing layer, and then at least one of adhesive, silver ink, and black ink is etched by laser etching or electron beam etching to form a micro-information array layer.

[0085] S508: Print a microlens structure on a substrate and cure the microlens structure to form a microlens array layer; or apply an imprinting adhesive layer on a substrate and use an imprinting plate with a microlens array pattern to mold and cure the imprinting adhesive layer to form a microlens array layer.

[0086] like Figure 6 As shown, the method for detecting the authenticity of anti-counterfeiting elements provided in this embodiment includes the following steps:

[0087] S602: Use a polarized light generator to emit polarized light to illuminate the anti-counterfeiting element and obtain the photosensitive information presented by the anti-counterfeiting element;

[0088] S604: Use natural light to illuminate the anti-counterfeiting element and obtain the micro-information presented by the anti-counterfeiting element;

[0089] S606: The authenticity of anti-counterfeiting elements is determined based on photosensitive information and micro-information, wherein the photosensitive information includes digital information and image information, and the micro-information includes digital information and image information.

[0090] Specifically, when determining the authenticity of an anti-counterfeiting element, and when both the photosensitive information and the micro-information are digital information, the multiplier relationship between the photosensitive information and the micro-information is first calculated. Then, the authenticity of the anti-counterfeiting element is determined based on the multiplier relationship between the photosensitive information and the micro-information. That is, the anti-counterfeiting element can only be determined to be genuine if the multiplier relationship between the photosensitive information and the micro-information meets the standard. When both the photosensitive information and the micro-information are image information, it can be determined whether the images of the photosensitive information and the micro-information are consistent or partially consistent, or whether they can form a complete image. When the photosensitive information and the micro-information are consistent or at least partially consistent, or when the photosensitive information and the micro-information form a complete image, the anti-counterfeiting element is genuine; otherwise, it is counterfeit.

[0091] Example 2

[0092] The difference between this embodiment and Embodiment 1 is that a trench layer 14 and a micro-information array layer 15 are simultaneously provided on the lower surface of the photosensitive information layer 13. Specifically:

[0093] This embodiment provides an anti-counterfeiting element 1 comprising a substrate 11, a photosensitive information layer 13, and a trench layer 14. The photosensitive information layer 13 is disposed on the lower surface of the substrate 11 and can display photosensitive information under polarized light irradiation. The trench layer 14 is disposed on the lower surface of the photosensitive information layer 13, and microgrooves 142 are provided on the trench layer 14. The microgrooves 142 are filled with fluorescent material 16, which can display fluorescent information under fluorescent irradiation. The anti-counterfeiting element 1 also includes a micro-information array layer 15, which is disposed parallel to the trench layer 14 on the lower surface of the photosensitive information layer 13. The micro-information array layer 15 includes at least one of a coating adhesive, silver ink, and black ink, and at least one of the coating adhesive, silver ink, and black ink can display micro-information under natural light irradiation. The photosensitive information, fluorescent information, and micro-information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element 1.

[0094] The anti-counterfeiting element 1 provided in this embodiment includes a substrate 11, a photosensitive information layer 13, a trench layer 14, and a micro-information array layer 15. The photosensitive information layer is disposed on the lower surface of the substrate 11 and can present photosensitive information under polarized light irradiation. The trench layer 14 is disposed on the lower surface of the photosensitive information layer 13 and has micro-grooves 142. The micro-grooves 142 are filled with fluorescent material 16, which can present fluorescent information under fluorescent irradiation. The micro-information array layer 15 is disposed side by side with the trench layer 14 on the lower surface of the photosensitive information layer 13 and can present micro-information under natural light irradiation. The photosensitive information, fluorescent information, and micro-information together serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element 1. The anti-counterfeiting element 1 of this application is provided with a photosensitive information layer, a groove layer 14, and a micro-information array layer 15. This allows the hidden photosensitive information to be displayed under polarized light irradiation. By providing the groove layer 14, fluorescent information can be generated under fluorescent irradiation. By providing the micro-information array layer 15, micro-information can be generated under natural light irradiation. The photosensitive information, fluorescent information, and micro-information serve as anti-counterfeiting information. That is, only when the photosensitive information, fluorescent information, and micro-information all conform to the preset correct information can the anti-counterfeiting element 1 be determined to be genuine. This allows this application to identify the authenticity of the anti-counterfeiting element 1 through multiple methods, solving the problem that existing anti-counterfeiting elements 1 can only be identified by a single method, making them easy to copy.

[0095] like Figure 7 As shown, the method for preparing the anti-counterfeiting element in this embodiment includes the following steps:

[0096] S702: A photosensitive alignment material is coated under a substrate. Light-blocking and light-leaking areas are created on a mask using photolithography, printing, or inkjet printing, forming a mask with a micro-pattern array. Under the cover of this mask, the photosensitive alignment material molecules are sequentially irradiated bidirectionally by polarized ultraviolet exposure in two mutually perpendicular directions, or by using polarized ultraviolet laser or polarized ultraviolet light projection, causing the photosensitive alignment material molecules to align in two mutually perpendicular directions. After drying, a photoalignment layer is formed. A nematic liquid crystal material is coated under the photoalignment layer. The nematic liquid crystal material molecules, promoted by the photosensitive alignment material molecules, align in the same way as the photosensitive alignment material molecules. After drying and curing, an image reflection layer is formed. The photosensitive information layer includes both the photoalignment layer and the image reflection layer.

[0097] S704: A cholesteric liquid crystal material is coated on the lower surface of the image reflective layer, and after drying and curing, an angle-dependent color-changing layer is formed.

[0098] S706: By printing or coating, an adhesive is applied to the lower surface of the angle-sensitive color-changing layer, cured to form an adhesive layer, and then microgrooves are formed on the surface of the adhesive layer by photolithography or nanoimprinting. Fluorescent material is then filled into the microgrooves by scraping to form a groove layer.

[0099] S708: At least one of adhesive, silver ink, and black ink is coated below the corner-changing color layer, and then at least one of adhesive, silver ink, and black ink is etched by laser etching or electron beam etching to form a micro-information array layer, wherein the micro-information array layer is flush with the trench layer.

[0100] S710: Print a microlens structure on a substrate and cure the microlens structure to form a microlens array layer; or apply an imprinting adhesive layer on a substrate and use an imprinting plate with a microlens array pattern to mold and cure the imprinting adhesive layer to form a microlens array layer.

[0101] like Figure 8 As shown, the method for detecting the authenticity of anti-counterfeiting elements provided in this embodiment includes the following steps:

[0102] S802: Use a polarized light generator to emit polarized light to illuminate the anti-counterfeiting element and obtain the photosensitive information presented by the anti-counterfeiting element;

[0103] S804: Use natural light to illuminate the anti-counterfeiting element and obtain the micro-information presented by the anti-counterfeiting element;

[0104] S806: Use a fluorescence generator to irradiate the anti-counterfeiting element and obtain the fluorescence information presented by the anti-counterfeiting element;

[0105] S808: The authenticity of anti-counterfeiting elements is determined based on photosensitive information, micro-information, and fluorescent information. Photosensitive information includes digital information and image information, micro-information includes digital information and image information, and fluorescent information includes digital information and image information.

[0106] Specifically, when the photosensitive information, fluorescent information, and micro-information are all digital information, the multiplier relationship between the photosensitive information and the fluorescent information is calculated first, followed by the multiplier relationship between the micro-information and the fluorescent information. The authenticity of the anti-counterfeiting element is then determined based on these relationships. In other words, the anti-counterfeiting element is only considered genuine if both the multiplier relationships between the photosensitive information and the fluorescent information, and between the micro-information and the fluorescent information, meet the required standards. When the photosensitive information, fluorescent information, and micro-information are all image information, it can be determined whether the images of the photosensitive information, fluorescent information, and micro-information are consistent, partially consistent, or can form a complete image. The anti-counterfeiting element is genuine when the photosensitive information, fluorescent information, and micro-information are consistent or at least partially consistent, or when the images of the photosensitive information, fluorescent information, and micro-information form a complete image; otherwise, it is counterfeit.

[0107] like Figure 9 As shown, an embodiment of the second aspect of the present invention provides a device 2 for detecting the authenticity of anti-counterfeiting elements, comprising: a polarized light generator 22 for emitting polarized light; a fluorescence generator 28 for emitting fluorescence; an image acquisition device 26 for acquiring images; and a processing unit 24 including a memory and a processor, wherein the memory stores a computer program, and the processor executes the program to implement the authenticity detection method of the present application. The device 2 for detecting the authenticity of anti-counterfeiting elements provided by the present application can implement the authenticity detection method of the present application. Therefore, the device 2 for detecting the authenticity of anti-counterfeiting elements has all the beneficial effects of the authenticity detection method of the present application, which will not be elaborated further here.

[0108] In embodiments of the present invention, the terms "first," "second," and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in embodiments of the present invention according to the specific circumstances.

[0109] Furthermore, although the operations are described in a specific order, this should be understood as requiring that such operations be performed in the specific order shown or in sequential order, or requiring that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

[0110] Although the subject matter has been described using language describing specific structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0111] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the embodiments. Those skilled in the art will recognize that various modifications and variations are possible with respect to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention.

Claims

1. An anti-counterfeiting element, characterized in that, include: Substrate; A photosensitive information layer is disposed on the lower surface of the substrate and is capable of displaying photosensitive information under polarized light irradiation; A trench layer is disposed on the lower surface of the photosensitive information layer. Microgrooves are provided on the trench layer, and fluorescent material is filled in the microgrooves. The fluorescent material can display fluorescent information under fluorescent irradiation. The photosensitive information and the fluorescent information serve as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element. A micro-information array layer is disposed on the lower surface of the photosensitive information layer in parallel with the trench layer. The micro-information array layer includes at least one of a coating adhesive, silver ink, and black ink. At least one of the coating adhesive, silver ink, and black ink can present micro-information under natural light. The fluorescence information and the color of the micro-information change with the viewing angle. The photosensitive information layer includes a light orientation layer, an image reflection layer, and an angle-dependent color-changing layer; The light alignment layer is disposed on the lower surface of the substrate, and the image reflection layer is disposed on the lower surface of the light alignment layer; The angle-dependent color-changing layer is disposed on the lower surface of the image reflective layer and is composed of cholesteric liquid crystal material, which can reflect light of different wavelengths as the viewing angle changes; The trench layer and the micro-information array layer are disposed below the angle-dependent color-changing layer.

2. The anti-counterfeiting element according to claim 1, characterized in that, Also includes: A microlens array layer is disposed on the upper surface of the substrate and includes a plurality of microlenses arranged in an array, wherein the microlenses are capable of amplifying the photosensitive information and the fluorescence information.

3. The anti-counterfeiting element according to claim 1, characterized in that, The micro-information also serves as anti-counterfeiting information.

4. The anti-counterfeiting element according to claim 3, characterized in that, The photosensitive information includes one or more of image information and digital information; the fluorescence information includes one or more of image information and digital information; and the micro-information includes one or more of image information and digital information.

5. The anti-counterfeiting element according to claim 4, characterized in that, When the photosensitive information, the fluorescence information, and the micro-information all include image information, the image of the photosensitive information, the fluorescence information, and the micro-information is consistent with or partially consistent with the image of the micro-information, or the photosensitive information, the fluorescence information, and the micro-information form a complete image; When the photosensitive information, the fluorescence information, and the micro-information all include digital information, the photosensitive information and the fluorescence information are in a preset multiple relationship, and the micro-information and the fluorescence information are in a preset multiple relationship.

6. The anti-counterfeiting element according to any one of claims 1 to 5, characterized in that, The photo-alignment layer is composed of a photosensitive alignment material. The photosensitive alignment material molecules on the photo-alignment layer include multiple groups of first-alignment molecules arranged along a first direction and multiple groups of second-alignment molecules arranged along a second direction. The first direction and the second direction are perpendicular to each other, and each group of first-alignment molecules and second-alignment molecules are arranged correspondingly. The image reflective layer is composed of nematic liquid crystal material. The arrangement of the nematic liquid crystal material molecules on the image reflective layer is the same as the arrangement of the photosensitive alignment material molecules on the photoalignment layer. Under the illumination of polarized light in the first direction and the second direction, the image reflective layer can reflect different photosensitive information in sequence.

7. A method for preparing an anti-counterfeiting element, characterized in that, The method for preparing the anti-counterfeiting element as described in any one of claims 1 to 6 includes: A photosensitive alignment material is coated beneath the substrate. Light-blocking and light-leaking areas are created on a photomask using photolithography, printing, or inkjet printing to form a photomask with a micro-pattern array. Under the cover of this photomask, the photosensitive alignment material molecules are sequentially irradiated bidirectionally by polarized ultraviolet exposure in two mutually perpendicular directions, or by using polarized ultraviolet laser or polarized ultraviolet light projection, causing the photosensitive alignment material molecules to align in two mutually perpendicular directions. After drying, a photoalignment layer is formed. A nematic liquid crystal material is coated beneath the photoalignment layer. The nematic liquid crystal material molecules, facilitated by the photosensitive alignment material molecules, align in the same way as the photosensitive alignment material molecules. After drying and curing, an image reflection layer is formed. The photosensitive information layer includes the photoalignment layer and the image reflection layer. An adhesive is applied to the lower surface of the photosensitive information layer by printing or coating, and cured to form an adhesive layer. Then, microgrooves are formed on the surface of the adhesive layer by photolithography or nanoimprinting. Fluorescent material is then filled into the microgrooves by scraping to form the groove layer.

8. The method for preparing the anti-counterfeiting element according to claim 7, characterized in that, Also includes: A microlens structure is printed on the substrate, and the microlens structure is cured to form a microlens array layer; Alternatively, an imprinting adhesive layer can be coated on the substrate, and the imprinting adhesive layer can be molded and cured using an imprinting plate with a microlens array pattern to form a microlens array layer.

9. The method for preparing the anti-counterfeiting element according to claim 7, characterized in that, Also includes: At least one of adhesive, silver ink, and black ink is coated below the image reflective layer, and then at least one of the adhesive, silver ink, and black ink is etched by laser etching or electron beam etching to form a micro-information array layer.

10. The method for preparing the anti-counterfeiting element according to claim 7, characterized in that, The process of preparing the photosensitive information layer also includes: A cholesteric liquid crystal material is coated on the lower surface of the image reflective layer, and after drying and curing, an angle-dependent color-changing layer is formed. The photosensitive information layer also includes an angle-dependent color-changing layer.

11. A method for detecting the authenticity of an anti-counterfeiting element, characterized in that, For detecting the authenticity of the anti-counterfeiting element as described in any one of claims 1 to 6, the method for detecting the authenticity of the anti-counterfeiting element includes the following steps: The anti-counterfeiting element is illuminated by polarized light emitted from a polarized light generator to obtain the photosensitive information presented by the anti-counterfeiting element; Irradiate the anti-counterfeiting element with a fluorescence generator to obtain the fluorescence information presented by the anti-counterfeiting element; The authenticity of the anti-counterfeiting element is determined based on the photosensitive information and the fluorescence information. The photosensitive information includes digital information and image information, and the fluorescence information includes digital information and image information.

12. The method for detecting the authenticity of anti-counterfeiting elements according to claim 11, characterized in that, When both the photosensitive information and the fluorescence information are digital information, the step of determining the authenticity of the anti-counterfeiting element based on the photosensitive information and the fluorescence information specifically includes: Calculate the ratio between the photosensitive information and the fluorescence information; The authenticity of the anti-counterfeiting element is determined based on the ratio between the photosensitive information and the fluorescence information. When both the photosensitive information and the fluorescence information are image information, the step of determining the authenticity of the anti-counterfeiting element based on the photosensitive information and the fluorescence information specifically includes: When the photosensitive information and the fluorescence information are consistent or at least partially consistent, or when the photosensitive information and the fluorescence information form a complete preset image, the anti-counterfeiting element is determined to be genuine; otherwise, it is counterfeit.

13. The method for detecting the authenticity of anti-counterfeiting elements according to claim 11, characterized in that, The anti-counterfeiting element also includes a micro-information array layer, which can display micro-information under natural light. The method for detecting the authenticity of the anti-counterfeiting element further includes: Under natural light conditions, the micro-information presented by the anti-counterfeiting element is acquired; When the photosensitive information, the fluorescence information, and the micro-information are all digital information, the step of determining the authenticity of the anti-counterfeiting element based on the photosensitive information and the fluorescence information specifically includes: Calculate the ratio between the photosensitive information and the fluorescence information; Calculate the fold relationship between the micro-information and the fluorescence information; The authenticity of the anti-counterfeiting element is determined based on the ratio between the photosensitive information and the fluorescence information, and the ratio between the micro-information and the fluorescence information. When the photosensitive information, the fluorescence information, and the micro-information are all image information, the step of determining the authenticity of the anti-counterfeiting element based on the photosensitive information and the fluorescence information specifically includes: When the photosensitive information, the fluorescence information, and the micro-information are consistent or at least partially consistent, or when the images of the photosensitive information, the fluorescence information, and the micro-information form a complete image, the anti-counterfeiting element is determined to be genuine; otherwise, it is counterfeit.

14. A device for detecting the authenticity of anti-counterfeiting components, characterized in that, The device for detecting the authenticity of an anti-counterfeiting element as described in any one of claims 1 to 6 includes: A polarized light generator, used to emit polarized light; A fluorescence generator, used to emit fluorescence; Image acquisition device, used to acquire images; The processing unit includes a storage device and a processor, wherein the storage device stores a computer program, and the processor executes the program to implement the method for detecting the authenticity of the anti-counterfeiting element as described in any one of claims 11 to 13.

Images