CN-121982966-A - Anti-counterfeiting element, preparation method thereof, authenticity detection method and detection device

CN121982966ACN 121982966 ACN121982966 ACN 121982966ACN-121982966-A

Abstract

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

Inventors

WANG BIN
CHEN GENG
GU KE
CHEN WEI
Lin Kuangye
DONG YALU

Assignees

中钞印制技术研究院有限公司
中国印钞造币集团有限公司

Dates

Publication Date: 20260505
Application Date: 20220906

Claims (14)

1. A security element comprising a first layer of a polymeric material, characterized by comprising the following steps: A substrate; the photosensitive information layer is arranged on the lower surface of the base material and can present photosensitive information under the irradiation of polarized light; The groove layer is arranged on the lower surface of the photosensitive information layer, a micro groove is arranged on the groove layer, fluorescent materials are filled in the micro groove, and the fluorescent materials can display fluorescent information under the irradiation of fluorescence; 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 is arranged on the lower surface of the photosensitive information layer in parallel with the groove layer, and comprises at least one of coating glue, silver ink and black ink, wherein the at least one of the coating glue, the silver ink and the black ink can present micro information under the irradiation of natural light, and the color of the fluorescent information and the color of the micro information change along with the change of an observation angle; the photosensitive information layer comprises a photo-orientation layer, an image reflection layer and an angular color variation layer; the light orientation layer is arranged on the lower surface of the base material, and the image reflection layer is arranged on the lower surface of the light orientation layer; the angle-dependent color-changing layer is arranged on the lower surface of the image reflecting layer and is made of cholesteric liquid crystal material, and can reflect light with different wavelengths along with the change of an observation angle; The groove layer and the micro information array layer are arranged below the corner-following color-changing layer.
2. The security element of claim 1, further comprising: The micro-lens array layer is arranged on the upper surface of the base material and comprises a plurality of micro-lenses which are arranged in an array mode, and the micro-lenses can amplify the photosensitive information and the fluorescent information.
3. The security element of claim 1 wherein the micro information also acts as security information.
4. The security element of claim 3 wherein, The sensitive information comprises one or more of image information and digital information, the fluorescent information comprises one or more of image information and digital information, and the micro information comprises one or more of image information and digital information.
5. The security element of claim 4 wherein, When the photosensitive information, the fluorescent information and the micro information all comprise image information, the photosensitive information, the fluorescent information and the micro information are consistent or partially consistent with each other, or the photosensitive information, the fluorescent information and the micro information form a complete image; when the photosensitive information, the fluorescent information and the micro information all comprise digital information, the photosensitive information and the fluorescent information form a preset multiple relationship, and the micro information and the fluorescent information form a preset multiple relationship.
6. The security element of any one of claims 1 to 5, wherein the photo-alignment layer is composed of a photo-alignment material, the photo-alignment material molecules on the photo-alignment layer include a plurality of groups of first alignment molecules arranged along a first direction and a plurality of 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 disposed correspondingly; The image reflecting layer is composed of nematic liquid crystal material, the arrangement mode of nematic liquid crystal material molecules on the image reflecting layer is the same as that of photosensitive orientation material molecules on the photo-orientation layer, and different photosensitive information can be reflected by the image reflecting layer in sequence under the irradiation of polarized light in the first direction and the second direction.
7. A preparation method of an anti-counterfeiting element is characterized in that, a method for making a security element as claimed in any one of claims 1 to 6, the method comprising: Coating a photosensitive orientation material below the base material, generating a shading area and a light leakage area on the mask plate in a photoetching, printing or ink-jet printing mode, forming the mask plate with a micro pattern array, sequentially carrying out polarized ultraviolet exposure in two directions perpendicular to each other under the coverage of the mask plate with the micro pattern array to carry out bidirectional irradiation on photosensitive orientation material molecules, or carrying out bidirectional irradiation on the photosensitive orientation material molecules in a polarized ultraviolet laser and polarized ultraviolet projection mode to enable the photosensitive orientation material molecules to be arranged in the two directions perpendicular to each other, and forming a photo-orientation layer after drying; And applying sizing material on the lower surface of the photosensitive information layer in a printing or coating mode, curing to form a sizing layer, forming a micro-groove on the surface of the sizing layer in a photoetching or nano-imprinting mode, and filling fluorescent material in the micro-groove in a doctor-blading mode to form the groove layer.
8. The method of making a security element of claim 7, further comprising: and printing a micro-lens structure on the substrate, and curing the micro-lens structure to form a micro-lens array layer, or coating an imprinting glue layer on the substrate, and performing compression molding curing on the imprinting glue layer by using an imprinting plate with a micro-lens array pattern to form the micro-lens array layer.
9. The method of making a security element of claim 7, further comprising: And coating at least one of glue, silver ink and black ink below the image reflecting layer, and etching at least one of glue distribution, silver ink and black ink by adopting a laser etching or electron beam etching mode to form the micro-information array layer.
10. The method of making a security element of claim 7, further comprising, during the making of the photosensitive information layer: And coating a cholesteric liquid crystal material on the lower surface of the image reflecting layer, drying and curing to form an angle-following color-changing layer, wherein the photosensitive information layer also comprises the angle-following color-changing layer.
11. A method of authenticity detection of a security element, for use in the detection of authenticity of a security element as claimed in any one of claims 1 to 6, the method comprising the steps of: Using a polarized light generating device to emit polarized light to irradiate the anti-counterfeiting element to obtain photosensitive information presented by the anti-counterfeiting element; Illuminating the anti-counterfeiting element by using a fluorescence generating device to obtain fluorescence information presented by the anti-counterfeiting element; Judging the authenticity of the anti-counterfeiting element according to the photosensitive information and the fluorescence information; wherein the photosensitive information includes digital information and image information, and the fluorescent information includes digital information and image information.
12. The method of claim 11, wherein the authentication of the security element, When the photosensitive information and the fluorescent information are both digital information, the step of judging the authenticity of the anti-counterfeiting element according to the photosensitive information and the fluorescent information specifically comprises the following steps: calculating the multiple relation between the photosensitive information and the fluorescence information; judging the authenticity of the anti-counterfeiting element according to the multiple relation between the photosensitive information and the fluorescence information; when the photosensitive information and the fluorescent information are both image information, the step of judging the authenticity of the anti-counterfeiting element according to the photosensitive information and the fluorescent information specifically comprises the following steps: and when the photosensitive information and the fluorescent information are consistent or at least partially consistent or the photosensitive information and the fluorescent information form a complete preset image, determining that the anti-counterfeiting element is true, otherwise, determining that the anti-counterfeiting element is false.
13. The method of claim 11, further comprising a micro-information array layer capable of presenting micro-information under irradiation of natural light, the method further comprising: Acquiring micro information presented by the anti-counterfeiting element under the condition of natural light irradiation; When the photosensitive information, the fluorescent information and the micro information are all digital information, the step of judging the authenticity of the anti-counterfeiting element according to the photosensitive information and the fluorescent information specifically comprises the following steps: calculating the multiple relation between the photosensitive information and the fluorescence information; calculating the multiple relation between the micro information and the fluorescence information; judging the authenticity of the anti-counterfeiting element according to the multiple relation between the photosensitive information and the fluorescence information and the multiple relation between the micro information and the fluorescence information; When the photosensitive information, the fluorescent information and the micro information are all image information, the step of judging the authenticity of the anti-counterfeiting element according to the photosensitive information and the fluorescent information specifically comprises the following steps: and when the photosensitive information, the fluorescent information and the micro information are consistent or at least partially consistent, or the photosensitive information, the fluorescent information and the micro information form a complete image, determining that the anti-counterfeiting element is true, otherwise, determining that the anti-counterfeiting element is false.
14. A device for detecting the authenticity of a security element according to any one of claims 1 to 6, the device comprising: A polarized light generating device for emitting polarized light; a fluorescence generating device for emitting fluorescence; image acquisition means for acquiring an image; A processing unit comprising a memory and a processor, said memory having stored thereon a computer program, said processor, when executing said program, implementing a method for detecting the authenticity of a security element according to any of claims 11 to 13.

Description

Anti-counterfeiting element, preparation method thereof, authenticity detection method and detection device The application relates to a Chinese patent application with application date of 2022, 09 and 06 days, application number of 202211095489.6 and the name of anti-counterfeiting element, a preparation method, an authenticity detection method and a detection device. Technical Field The application belongs to the technical field of anti-counterfeiting, and particularly relates to an anti-counterfeiting element, a preparation method thereof, an authenticity detection method and a detection device. Background At present, the traditional anti-counterfeiting element is generally provided with a luminescent material on the surface of the anti-counterfeiting element, so that the luminescent material can emit light and generate anti-counterfeiting information under the irradiation of excitation light or radio waves, the anti-counterfeiting information of the anti-counterfeiting element is generally specific and unchangeable, the difficulty of being plagiarized is reduced, and meanwhile, the mode of generating the anti-counterfeiting information by irradiating the anti-counterfeiting element through the excitation light or the radio waves is common, and the anti-counterfeiting information is easy to be plagiarized by illegal molecules. Therefore, in order to reduce the risk of being plagued and improve the concealment of the anti-counterfeiting element, providing an anti-counterfeiting element for comprehensively identifying authenticity through various modes is a problem to be solved urgently. Disclosure of Invention The present invention aims to solve or improve at least one of the above technical problems. A first aspect of the invention provides a security element. A second aspect of the present invention is to provide a method of manufacturing a security element. A third aspect of the present invention provides a method for detecting authenticity of a security element. A fourth aspect of the present invention provides an authentication device for a security element. The technical scheme of the first aspect provides an anti-counterfeiting element, which comprises a base material, a photosensitive information layer, a groove layer and a micro groove, wherein the photosensitive information layer is arranged on the lower surface of the base material and can present photosensitive information under the irradiation of polarized light, the groove layer is arranged on the lower surface of the photosensitive information layer, the micro groove is filled with fluorescent materials, the fluorescent materials can present fluorescent information under the irradiation of fluorescence, and the photosensitive information and the fluorescent information are used as the anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element. The anti-counterfeiting element comprises a base material, a photosensitive information layer and a groove layer, wherein the photosensitive information layer is arranged on the lower surface of the base material and can display photosensitive information under the irradiation of polarized light, the groove layer is arranged on the lower surface of the photosensitive information layer, a micro groove is arranged on the groove layer, fluorescent materials are filled in the micro groove and can display fluorescent information under the irradiation of fluorescence, and the photosensitive information and the fluorescent information are used as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element. The anti-counterfeiting element is provided with the photosensitive information layer and the groove layer, so that hidden photosensitive information can be presented under the irradiation of polarized light, fluorescent information can be generated under the irradiation of fluorescence by arranging the groove layer, the photosensitive information and the fluorescent information are used as anti-counterfeiting information, namely, the anti-counterfeiting element can be determined to be true only when the photosensitive information and the fluorescent information are in accordance with preset correct information, and the anti-counterfeiting element can be identified to be true in various ways, so that the anti-counterfeiting element can be identified to be true in various ways, and the problem that the existing anti-counterfeiting element can only be plagiarized by a single identification method is solved. Of course, the trench layer may be disposed on the lower surface of the substrate, that is, the trench layer and the photosensitive information layer are disposed on the same plane, and disposed below the substrate, as required. In the technical scheme, the anti-counterfeiting element further comprises a micro lens array layer which is arranged on the upper surface of the base material and comprises a plurality of micro lenses