Naked-eye stereoscopic anti-counterfeiting label with laser hiding effect and manufacturing method thereof

Abstract

This invention discloses a naked-eye 3D anti-counterfeiting label with laser-hidden effect and its manufacturing method. Belonging to the field of anti-counterfeiting label preparation technology, it uses directional etching to implant and fix laser-reproduced hidden content, allowing the hidden content to be nested and integrated with a miniature anti-counterfeiting pattern, significantly improving anti-counterfeiting security. It combines conventional naked-eye 3D visual anti-counterfeiting with laser-triggered hidden development anti-counterfeiting, with a dual-layer anti-counterfeiting structure working together. It mainly includes the following steps: Miniature pattern design and layout: Designing miniature anti-counterfeiting patterns according to anti-counterfeiting requirements, and using anti-counterfeiting layout software to standardize and arrange the miniature patterns to generate photolithography production files; Laser encryption photolithography: After coating the substrate surface with photoresist and performing pretreatment, the photolithography production files are imported into the photolithography equipment for alignment exposure; While the conventional miniature pattern photolithography exposure is being performed, a laser encryption module is used to directionally etch and fix laser-reproduced hidden content. This invention is mainly used for the manufacture of naked-eye 3D anti-counterfeiting labels.

Description

Technical Field

[0001] This invention relates to the field of anti-counterfeiting label preparation technology, and more specifically, to a naked-eye three-dimensional anti-counterfeiting label with laser concealment effect and its manufacturing method. Background Technology

[0002] Existing naked-eye 3D anti-counterfeiting labels primarily rely on microlens array imaging technology. Through optical matching of miniature patterns and lens arrays, they can achieve naked-eye visible 3D visual effects such as image sinking, floating, and gradation, providing a certain degree of anti-counterfeiting identification and are widely used in brand protection and product traceability scenarios. However, the anti-counterfeiting dimensions of existing naked-eye 3D anti-counterfeiting labels are relatively simple, relying solely on optical imaging effects for identification and lacking strong encryption functions. The surface patterns of such labels are easily scanned or counterfeited with high precision, and they cannot provide a second layer of covert verification, resulting in insufficient anti-counterfeiting security. They are unable to cope with increasingly complex counterfeiting techniques and cannot meet the anti-counterfeiting requirements of high-security products. Summary of the Invention

[0003] The purpose of this invention is to provide a naked-eye 3D anti-counterfeiting label with laser-induced hiding effect and its manufacturing method. It reproduces hidden content by directional etching and implanting a fixed laser, so that the hidden content is nested and integrated with the miniature anti-counterfeiting pattern, which greatly improves the anti-counterfeiting security. It combines conventional naked-eye 3D visual anti-counterfeiting with laser-triggered hiding and developing anti-counterfeiting, and the two-layer anti-counterfeiting structure works together.

[0004] This invention is achieved through the following technical solution: A method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect, specifically including the following steps: S1. Miniature Pattern Design and Layout: Design miniature anti-counterfeiting patterns according to anti-counterfeiting requirements, and use anti-counterfeiting layout software to standardize and layout the miniature patterns to generate standardized photolithography production files. S2. Laser Encryption Lithography: After coating the substrate surface with photoresist and performing pretreatment, the lithography production file is imported into the lithography equipment for alignment and exposure. While the conventional micro-pattern is being exposed for lithography, a high-precision laser encryption module is used to directionally etch and implant the fixed laser to reproduce the hidden content, so that the hidden content is nested and fused with the micro-anti-counterfeiting pattern. The etching precision is matched with the micro-anti-counterfeiting pattern cycle. After development, fixing, and post-baking, a lithography master with laser encryption information is formed. The photoresist is AZ4600 model photoresist, and the thickness of the dry film formed after coating is stably controlled at 3-5μm. S3, Double-sided nanoimprinting: A highly transparent film is selected as the imprinting substrate. A photolithography master with laser-encrypted information is used to transfer and imprint the bottom pattern. A microlens array structure is imprinted on the top surface of the film, so that the bottom micro-pattern and the surface microlens array are aligned one-to-one and solidified to form a naked-eye three-dimensional structure. S4. Composite coating treatment: The three-dimensional anti-counterfeiting film after embossing is cleaned and dusted, a composite adhesive layer is coated on the bottom surface of the film, and a light-transmitting protective adhesive is coated on the surface of the microlens. Then, it is cured and dried. S5. Die-cutting: The cured three-dimensional anti-counterfeiting film is die-cut using die-cutting equipment to obtain the finished anti-counterfeiting label.

[0005] Furthermore, the overall period of the micro-anti-counterfeiting pattern is limited to 50-60μm, and the size of each pattern element is uniform and the precision is consistent. The regularized layout adopts a honeycomb array arrangement or a cat's eye gradient arrangement. When the regularized layout adopts a honeycomb array arrangement, multiple identical micro-pattern elements are evenly distributed in an array, and the alignment and adaptation of the pattern with the lens array are completed. When the regularized layout adopts a cat's eye gradient arrangement, the density and outline ratio of the micro-pattern are re-adapted and arranged in combination with the array arrangement rules and magnification characteristics of the surface microlenses to adapt to the gradient imaging characteristics of the microlenses.

[0006] Furthermore, when the regularized layout adopts a honeycomb array arrangement, the hidden content reproduced by the laser in step S2 is a unique graphic identifier "TB". The unique graphic identifier "TB" is implanted by the high-precision laser encryption module through directional etching. The etching precision matches the period of the micro-anti-counterfeiting pattern, and the etching process does not damage the original micro-pattern structure.

[0007] Furthermore, in step S3, the high-transparency film is a PET film with a thickness of 50-60μm and a light transmittance of 90%-95%; the period of the surface microlens array is 50-60μm and the thickness is 10μm; after imprinting, a honeycomb periodic array naked-eye stereoscopic structure is formed, realizing a fixed depth of field sinking or floating stereoscopic visual effect.

[0008] Furthermore, when the standardized layout adopts the cat-eye gradient layout method, the hidden content reproduced by the laser in step S2 is fixed as the exclusive graphic identifier "TB". The exclusive graphic identifier "TB" is implanted by the high-precision laser encryption module through directional etching. The etching process does not destroy the pattern gradient imaging structure and the overall layout.

[0009] Furthermore, in step S3, the high-transparency film is a BOPP film with a thickness of 50-60μm and a light transmittance of 90%-95%; the surface microlens array has a period of 50-60μm and a thickness of 10μm; after imprinting, a cat's eye gradient three-dimensional structure is formed, so that the pattern presents a gradient cat's eye three-dimensional effect with a large center magnification and a small edge magnification.

[0010] Furthermore, the central area of ​​the pattern in the cat-eye gradient 3D structure is magnified by 250-300 times, while the surrounding edge area is magnified by 30-100 times.

[0011] Furthermore, in step S4, the composite adhesive layer is a special anti-counterfeiting composite adhesive layer, and the light-transmitting protective adhesive is an ultra-thin light-transmitting protective adhesive; the curing and drying treatment is a low-temperature curing and drying or a constant-temperature curing process to ensure that the adhesive layer is completely cured and free of bubbles and wrinkles.

[0012] A naked-eye 3D anti-counterfeiting label with laser hiding effect is manufactured using the above-mentioned manufacturing method for naked-eye 3D anti-counterfeiting labels with laser hiding effect. The naked-eye 3D anti-counterfeiting label presents a naked-eye 3D visual effect under normal conditions, and when precisely irradiated by a matching laser pen, the embedded fixed laser reproduces the hidden content.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Dual anti-counterfeiting dimensions: It combines conventional naked-eye 3D visual anti-counterfeiting with laser-triggered hidden development anti-counterfeiting. The two-layer anti-counterfeiting structure works together to completely solve the problem of single anti-counterfeiting in traditional labels.

[0014] 2. Extremely high difficulty in counterfeiting: The laser encryption information is implanted in one go during the photolithography stage, which has strong process confidentiality and high replication threshold. Ordinary counterfeiting equipment cannot accurately replicate the encrypted micro-pattern, which greatly improves anti-counterfeiting security.

[0015] 3. Excellent 3D effect: Through the double-sided nanoimprinting process with precise parameter control, a stable periodic array 3D effect and a cat's eye gradient 3D effect can be achieved, with clear imaging, uniform depth of field and high visual recognition.

[0016] 4. Wide adaptability: The base film has good light transmittance, uniform thickness, and flexible material, which can be adapted to various paper, plastic and metal substrates for labeling and anti-counterfeiting, and is applicable to a wide range of scenarios. Attached Figure Description

[0017] Figure 1 This is a laser reproduction display effect diagram of the present invention; Figure 2 This is a diagram illustrating the effect of the periodic array of the present invention; Figure 3 This is a display image of the cat-eye gradient 3D anti-counterfeiting label effect of the present invention. Detailed Implementation

[0018] The present invention will now be further described.

[0019] like Figure 1 – Figure 3 As shown in Example 1, a method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect specifically includes the following steps: S1. Miniature Pattern Design and Layout: Design miniature anti-counterfeiting patterns according to anti-counterfeiting requirements, and use anti-counterfeiting layout software to standardize and layout the miniature patterns to generate standardized photolithography production files. S2. Laser Encryption Lithography: After coating the substrate surface with photoresist and performing pretreatment, the lithography production file is imported into the lithography equipment for alignment and exposure. While the conventional micro-pattern is being exposed for lithography, a high-precision laser encryption module is used to directionally etch and implant the fixed laser to reproduce the hidden content, so that the hidden content is nested and fused with the micro-anti-counterfeiting pattern. The etching precision is matched with the micro-anti-counterfeiting pattern cycle. After development, fixing, and post-baking, a lithography master with laser encryption information is formed. The photoresist is AZ4600 model photoresist, and the thickness of the dry film formed after coating is stably controlled at 3-5μm. S3, Double-sided nanoimprinting: A highly transparent film is selected as the imprinting substrate. A photolithography master with laser-encrypted information is used to transfer and imprint the bottom pattern. A microlens array structure is imprinted on the top surface of the film, so that the bottom micro-pattern and the surface microlens array are aligned one-to-one and solidified to form a naked-eye three-dimensional structure. S4. Composite coating treatment: The three-dimensional anti-counterfeiting film after embossing is cleaned and dusted, a composite adhesive layer is coated on the bottom surface of the film, and a light-transmitting protective adhesive is coated on the surface of the microlens. Then, it is cured and dried. S5. Die-cutting: The cured three-dimensional anti-counterfeiting film is die-cut using die-cutting equipment to obtain the finished anti-counterfeiting label.

[0020] Specifically, the overall period of the micro-anti-counterfeiting pattern is limited to 50-60μm, and the size of each group of pattern elements is uniform and the precision is consistent. The regularized layout adopts a honeycomb array arrangement or a cat's eye gradient arrangement. When the regularized layout adopts a honeycomb array arrangement, multiple identical micro-pattern elements are evenly distributed in an array, and the alignment and adaptation of the pattern with the lens array are completed. When the regularized layout adopts a cat's eye gradient arrangement, the density and outline ratio of the micro-pattern are re-adapted and arranged in combination with the array arrangement rules and magnification characteristics of the surface microlenses to adapt to the gradient imaging characteristics of the microlenses.

[0021] When the regular layout adopts a honeycomb array arrangement, the hidden content reproduced by the laser in step S2 is a unique graphic identifier "TB". The unique graphic identifier "TB" is implanted by the high-precision laser encryption module through directional etching. The etching precision matches the period of the micro anti-counterfeiting pattern, and the etching process does not damage the original micro pattern structure.

[0022] In step S3, the high-transparency film is a PET film with a thickness of 50-60μm and a light transmittance of 90%-95%; the surface microlens array has a period of 50-60μm and a thickness of 10μm; after imprinting, a honeycomb periodic array naked-eye stereoscopic structure is formed, realizing a fixed depth of field sinking or floating stereoscopic visual effect.

[0023] When the regular layout adopts the cat-eye gradient layout method, the hidden content reproduced by the laser in step S2 is fixed as the exclusive graphic identifier "TB". The exclusive graphic identifier "TB" is implanted by the high-precision laser encryption module through directional etching. The etching process does not destroy the gradient image structure and the overall layout.

[0024] In step S3, the high-transparency film is a BOPP film with a thickness of 50-60μm and a light transmittance of 90%-95%; the surface microlens array has a period of 50-60μm and a thickness of 10μm; after imprinting, a cat's eye gradient three-dimensional structure is formed, so that the pattern presents a gradient cat's eye three-dimensional effect with a large center magnification and a small edge magnification.

[0025] The central area of ​​the pattern in the cat-eye gradient 3D structure is magnified 250-300 times, while the surrounding edge area is magnified 30-100 times.

[0026] In step S4, the composite adhesive layer is a special anti-counterfeiting composite adhesive layer, and the light-transmitting protective adhesive is an ultra-thin light-transmitting protective adhesive; the curing and drying treatment is a low-temperature curing and drying or constant-temperature curing process to ensure that the adhesive layer is completely cured and free of bubbles and wrinkles.

[0027] Example 2: A naked-eye 3D anti-counterfeiting label with laser hiding effect, manufactured using the above-described manufacturing method. The naked-eye 3D anti-counterfeiting label presents a naked-eye 3D visual effect under normal conditions, and when precisely illuminated by a matching laser pen, the embedded fixed laser reveals the hidden content.

[0028] The exclusive graphic identifier "TB" described in this invention can be any letter or combination thereof. It breaks through the traditional single-mode stereoscopic imaging anti-counterfeiting approach by simultaneously embedding laser-encrypted hidden information into the core photolithography processes of two mainstream naked-eye stereoscopic structures: periodic array effect and cat's-eye effect. This process is a proprietary integrated process, requiring no additional steps and maintaining the original stereoscopic imaging effect while adding a laser-triggered hidden development anti-counterfeiting function. The encrypted information is embedded within the photolithographic microstructure, making it impossible to replicate through conventional scanning, photographing, or copying processes. This significantly raises the anti-counterfeiting threshold from the fundamental technological level, combining aesthetically pleasing stereoscopic display with high-level anti-counterfeiting practicality, making it suitable for various high-end, high-security anti-counterfeiting scenarios.

[0029] The following details the preparation methods for two anti-counterfeiting labels.

[0030] Preparation of Naked-eye 3D Anti-counterfeiting Labels with Cellular Periodic Array and Laser Hidden Development: The core of the prepared anti-counterfeiting label is a 3D structure with a honeycomb periodic array, which can achieve a fixed depth-of-field sinking / floating 3D effect, and the array shaking provides a significant visual dynamic effect. It also has the function of revealing hidden patterns when illuminated by a laser pointer. The specific preparation steps are as follows: Step 1: Miniature Design and Software Layout Design a custom micro-anti-counterfeiting pattern according to preset anti-counterfeiting requirements. The overall period of the micro-anti-counterfeiting pattern is limited to 50-60μm, and the size and precision of each pattern element are uniform. After the pattern design is completed, the micro-anti-counterfeiting pattern is regularized and arranged using anti-counterfeiting layout software. Multiple identical micro-pattern elements are evenly distributed in a honeycomb array to ensure that the array arrangement is without misalignment, gaps, or overlap. At the same time, the subsequent microlens array parameters are matched to complete the alignment and adaptation of the pattern and the lens array, generating a standardized photolithography production file.

[0031] Step 2: Laser Encryption Lithography Process A flat, dust-free substrate is selected as the photolithography carrier. AZ4600 photoresist is coated onto the substrate surface using a spin-coating process, ensuring a stable dry film thickness of 3-5 μm. After coating, a pre-baking treatment is performed. The standardized photolithography production file is imported into the photolithography equipment for precise alignment and exposure. Simultaneously with the conventional micro-pattern photolithography exposure, a fixed laser-reproduced hidden content "TB" is directionally etched and implanted using the high-precision laser encryption module of the photolithography equipment. This ensures that the laser-reproduced hidden content "TB" is precisely nested and fused with the micro-anti-counterfeiting pattern, with the etching precision matching the period of the micro-anti-counterfeiting pattern. The etching process does not damage the original micro-pattern structure and does not affect the subsequent stereoscopic imaging effect. After photolithography and laser etching are completed, development, fixing, and post-baking treatments are performed to solidify and form a micro-pattern photolithography structure with the laser-reproduced hidden content "TB". The hidden content "TB" is an invisible structure that cannot be detected by the naked eye, conventional lighting, or scanning. It can only be activated by precise illumination with the accompanying laser pointer, which clearly reveals the exclusive "TB" text and images, thus achieving the laser reproduction hidden development anti-counterfeiting function.

[0032] Step 3: Double-sided nanoimprint molding A highly transparent PET film with a thickness of 50-60μm and a light transmittance of 90%-95% was selected as the imprinting substrate. A double-sided precision nanoimprinting process was used to complete the transfer of the bottom layer pattern and the formation of the surface microlens.

[0033] Underlying Imprint: The micro-pattern photolithography structure with the hidden content "TB" reproduced by laser prepared in step two is used as the imprint master. The complete honeycomb array micro-encryption pattern is transferred to the bottom surface of the high-transparency PET film through nanoimprint technology, ensuring that the pattern transfer is complete, without deformation or loss, and the encrypted information is completely preserved.

[0034] Surface Imprinting: A microlens array imprinting mold is used to imprint a microlens array structure with a cycle length of 50-60μm and a thickness of 10μm onto the top surface of a highly transparent PET film. The microlens array precisely corresponds one-to-one with the underlying honeycomb micro-pattern. After imprinting, it is cured and set, forming a complete honeycomb periodic array naked-eye 3D structure. It can achieve a fixed depth of field sinking and floating 3D effect. When the label is shaken, each element in the array shakes synchronously and dynamically, resulting in a significant 3D visual effect. Moreover, multiple depth elements can be freely superimposed and combined to enrich the 3D display effect.

[0035] Step 4: Composite Adhesive Coating Treatment The 3D anti-counterfeiting film, after nano-imprinting, undergoes surface purification and dust removal treatment to remove impurities such as dust and adhesive residue generated during the imprinting process. Subsequently, a special anti-counterfeiting composite adhesive layer is evenly coated onto the bottom surface of the 3D anti-counterfeiting film. This layer has uniform thickness and strong adhesion, improving label adhesion stability and scratch and aging resistance. Simultaneously, an ultra-thin light-transmitting protective adhesive is coated onto the surface of the microlens structure, without affecting light transmittance or 3D imaging effects. This effectively protects the microlens structure from wear and scratches, extending the label's lifespan. After adhesive coating, low-temperature curing and drying are performed to ensure complete curing of the adhesive layer, leaving it free of bubbles and wrinkles.

[0036] Step 5: Die-cutting Based on the preset size and shape specifications of the product's anti-counterfeiting label, precision die-cutting equipment is used to accurately die-cut the cured three-dimensional anti-counterfeiting film, cutting out standard-sized individual anti-counterfeiting labels. The die-cutting process ensures that the edges are flat, burr-free, and structurally undamaged. After cutting, quality inspection is carried out to remove defective products with misaligned patterns, abnormal imaging, or missing encryption information, ultimately obtaining the finished labels.

[0037] Finished label effect: Under normal conditions, the naked eye can clearly observe the 3D effect of the honeycomb periodic array, which has a fixed depth of field 3D vision with sinking and floating, and the dynamic effect of shaking the label is smooth; when the label area is precisely illuminated with a laser pointer, the laser-encrypted hidden information nested at the bottom layer is activated, revealing the exclusive hidden anti-counterfeiting pattern, and completing the double anti-counterfeiting verification.

[0038] Preparation of Gradient 3D Anti-counterfeiting Labels with Laser Hidden Development: Anti-counterfeiting labels are prepared based on cat-eye 3D imaging technology, achieving a gradient cat-eye 3D effect with high magnification in the center and low magnification at the edges. Simultaneously, laser encryption technology is integrated throughout the process, retaining the laser hidden development anti-counterfeiting function. The overall preparation process also employs a five-step process, as detailed below: Step 1: Miniature Pattern Design and Algorithm Layout Design a unique cat-eye anti-counterfeiting micro-pattern, limiting the period of the micro-pattern to 50-60μm, with fine lines and clear outlines. After completing the basic pattern design, use a unique imaging algorithm (existing technology) to re-adapt and rearrange the micro-pattern based on the array arrangement and magnification characteristics of the surface microlenses, adjusting the pattern density and outline proportions to match the microlens gradient imaging characteristics. This lays the foundation for the subsequent formation of a "fat in the middle and flat around the edges" cat-eye gradient effect and generates standardized photolithography production files.

[0039] Step 2: Photolithography process with laser encryption A flat, dust-free substrate is selected as the photolithography carrier. AZ4600 photoresist is coated onto the substrate surface using a spin-coating process, ensuring a stable dry film thickness of 3-5 μm. Pre-baking is then performed after coating. The standardized photolithography production file is imported into the photolithography equipment for precise alignment and exposure. Simultaneously with the conventional micro-pattern photolithography exposure, a fixed laser-reproduced hidden content "TB" is directionally etched and implanted using the high-precision laser encryption module of the photolithography equipment. This allows the laser-reproduced hidden content "TB" to be nested, fused, and precisely adapted to the basic cat-eye anti-counterfeiting micro-pattern. The etching process does not damage the pattern's gradient imaging structure or overall shape, making it undetectable to the naked eye or conventional visual observation. Only by illuminating the corresponding area of ​​the label with a dedicated laser pointer can structural imaging be triggered, clearly revealing the hidden "TB" image, achieving a unique laser-reproduced anti-counterfeiting effect. After photolithography and laser etching are completed, development, fixing, and post-baking processes are performed to solidify and form a cat-eye micro-pattern photolithography master with the laser-reproduced hidden content "TB".

[0040] Step 3: Double-sided nano-imprint 3D molding A highly transparent BOPP film with a thickness of 50-60μm and a light transmittance of 90%-95% was selected as the imprinting substrate, and a three-dimensional structure was formed by using a double-sided precision nanoimprinting process. Underlying Imprinting: The cat-eye miniature pattern photolithography master prepared in step two with the hidden content "TB" reproduced by laser is used as the imprinting master. The complete cat-eye miniature encrypted pattern is transferred to the bottom surface of the high-transparency BOPP film through nanoimprinting technology, ensuring that the pattern gradient structure and encrypted information are complete and without defects. Surface Imprinting: A microlens array imprinting mold is used to imprint a microlens array structure with a forming cycle of 50-60μm and a thickness of 10μm on the top surface of the high-transparency BOPP film, ensuring precise alignment and matching between the microlens array structure and the underlying cat-eye miniature pattern. After imprinting, the pattern is cured and set, forming a gradient three-dimensional cat-eye structure. Utilizing the principle of microlens imaging gradient, the pattern presents a gradient cat-eye three-dimensional effect with a high magnification at the center and a low magnification at the edges. The magnification of the central area of ​​the pattern is 250-300 times, while the magnification of the surrounding edge area is 30-100 times, creating a significant difference in magnification. The greater the difference in magnification between the center and the edges, the stronger the three-dimensional effect of the cat-eye. Ultimately, a classic cat-eye three-dimensional effect with a full center and flat edges is presented, resulting in a natural gradient, strong sense of layering, and extremely high recognizability of the cat-eye visual features.

[0041] Step 4: Composite Adhesive Reinforcement Treatment The surface of the nano-imprinted cat-eye 3D anti-counterfeiting film is cleaned and dusted to remove fine particles and process residues. A high-strength composite adhesive is evenly coated on the bottom surface of the cat-eye 3D anti-counterfeiting film to ensure that the label is firmly attached, not easy to fall off or lift. A high-transmittance and wear-resistant protective adhesive is coated on the surface of the microlens structure to isolate air oxidation and physical wear, and protect the accuracy of the cat-eye 3D imaging and the integrity of the encrypted structure. After the adhesive is applied, a constant temperature curing process is used to ensure that the adhesive layer is flat and cured without any imaging obstruction defects.

[0042] Step 5: Precision die-cutting According to the preset label specifications, the cured anti-counterfeiting film is precisely cut using precision die-cutting equipment to produce standardized cat-eye 3D anti-counterfeiting labels. The die-cutting process is strictly controlled to avoid damaging the 3D structure and encrypted pattern. After cutting, the finished products are inspected, with a focus on verifying the 3D imaging effect of the cat-eye and the laser concealment and development function, and qualified products are selected.

[0043] Finished label effect: Under normal naked-eye conditions, the label presents a clear cat-eye gradient 3D effect, with a full center and narrowing edges, and a distinct sense of 3D gradient layering; after being triggered by a laser pointer, the hidden laser-encrypted pattern is accurately revealed, achieving a dual anti-counterfeiting effect of naked-eye 3D anti-counterfeiting + laser hidden development anti-counterfeiting.

Claims

1. A method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect, characterized in that: Specifically, the steps include the following: S1. Miniature Pattern Design and Layout: Design miniature anti-counterfeiting patterns according to anti-counterfeiting requirements, and use anti-counterfeiting layout software to standardize and layout the miniature patterns to generate photolithography production files. S2. Laser Encryption Photolithography: After coating the substrate surface with photoresist and performing pretreatment, the photolithography production file is imported into the photolithography equipment for alignment and exposure. While the conventional micro-pattern photolithography exposure is being performed, the hidden content is reproduced by directional etching and fixed laser through the laser encryption module, so that the hidden content is nested and fused with the micro-anti-counterfeiting pattern. The etching precision is matched with the micro-anti-counterfeiting pattern cycle. After development, fixing and post-baking treatment, a photolithography master with laser encryption information is formed. S3, Double-sided nanoimprinting: A highly transparent film is selected as the imprinting substrate. A photolithography master with laser-encrypted information is used to transfer and imprint the bottom pattern. A microlens array structure is imprinted on the top surface of the film, so that the bottom micro-pattern and the surface microlens array are aligned one-to-one and solidified to form a naked-eye three-dimensional structure. S4. Composite coating treatment: The three-dimensional anti-counterfeiting film after embossing is cleaned and dusted, a composite adhesive layer is coated on the bottom surface of the film, and a light-transmitting protective adhesive is coated on the surface of the microlens. Then, it is cured and dried. S5. Die-cutting: The cured three-dimensional anti-counterfeiting film is die-cut using die-cutting equipment to obtain the finished anti-counterfeiting label.

2. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 1, characterized in that: The period of the micro-anti-counterfeiting pattern is 50-60μm, and the size of each pattern element is uniform and the precision is consistent. The regularized layout adopts a honeycomb array arrangement or a cat's eye gradient arrangement. When the regularized layout adopts a honeycomb array arrangement, multiple identical micro-pattern elements are evenly distributed in an array, and the alignment and adaptation of the pattern with the lens array are completed. When the regularized layout adopts a cat's eye gradient arrangement, the density and outline ratio of the micro-pattern are re-adapted and arranged in combination with the array arrangement rules and magnification characteristics of the surface microlenses to adapt to the gradient imaging characteristics of the microlenses.

3. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 2, characterized in that: When the regular layout adopts a honeycomb array arrangement, the hidden content reproduced by the laser in step S2 is fixed as the graphic identifier "TB". The graphic identifier "TB" is implanted by the laser encryption module through directional etching. The etching precision matches the period of the micro anti-counterfeiting pattern, and the etching process does not damage the original micro pattern structure.

4. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 3, characterized in that: In step S3, the highly transparent film is a PET film with a thickness of 50-60μm and a light transmittance of 90%-95%; the surface microlens array has a period of 50-60μm and a thickness of 10μm; after imprinting, a honeycomb periodic array naked-eye stereoscopic structure is formed, realizing a fixed depth of field sunken or floating stereoscopic visual effect.

5. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 2, characterized in that: When the regular layout adopts the cat-eye gradient layout method, in step S2, the hidden content to be reproduced by laser is fixed as the graphic identifier "TB". The graphic identifier "TB" is implanted by the laser encryption module through directional etching. The etching process does not destroy the pattern gradient imaging structure and the overall layout.

6. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 5, characterized in that: In step S3, the high-transparency film is a BOPP film with a thickness of 50-60μm and a light transmittance of 90%-95%; the surface microlens array has a period of 50-60μm and a thickness of 10μm; after imprinting, a cat's eye gradient three-dimensional structure is formed, so that the pattern presents a gradient cat's eye three-dimensional effect with a large center magnification and a small edge magnification.

7. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 6, characterized in that: The central area of ​​the pattern in the cat-eye gradient 3D structure is magnified 250-300 times, while the surrounding edge area is magnified 30-100 times.

8. The method for manufacturing a naked-eye 3D anti-counterfeiting label with laser concealment effect according to claim 1, characterized in that: In step S4, the composite adhesive layer is an anti-counterfeiting composite adhesive layer, and the light-transmitting protective adhesive is an ultra-thin light-transmitting protective adhesive; the curing and drying process is a low-temperature curing and drying or a constant-temperature curing process to ensure that the adhesive layer is completely cured and free of bubbles and wrinkles.

9. A naked-eye 3D anti-counterfeiting label with laser-concealing effect, characterized in that: The naked-eye three-dimensional anti-counterfeiting label with laser hiding effect is manufactured by any one of claims 1-8. The naked-eye three-dimensional anti-counterfeiting label presents a naked-eye three-dimensional visual effect under normal conditions, and when accurately irradiated by a matching laser pen, the embedded fixed laser reproduces the hidden content.

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