Fluorescence imaging film, anti-counterfeiting product and manufacturing method of fluorescence imaging film

Abstract

The embodiment of the invention provides a fluorescent imaging film, an anti-counterfeiting product and a manufacturing method of the fluorescent imaging film. The fluorescent imaging film comprises a fluorescent layer, a spacing layer and a lens layer. Wherein the lens layer is arranged on one side of the spacing layer, and the lens layer comprises a plurality of micro lenses which are arranged in an array; the fluorescent layer is arranged on the side, opposite to the lens layer, of the spacing layer, the spacing layer is used for spacing the fluorescent layer and the lens layer, and the distance from the fluorescent layer to the lens layer meets the transmission focal length. The fluorescent layer comprises a plurality of fluorescent parts which are arranged in an array mode, fluorescent pattern microstructures are arranged in the fluorescent parts, and the fluorescent pattern microstructures are filled with fluorescent materials. And each micro lens is arranged corresponding to each fluorescent part. The fluorescent imaging film enables people to observe fluorescent and suspended images under illumination, and rich visual effects and excellent anti-counterfeiting effects are obtained.

Description

Technical Field

[0001] The present application relates to the field of suspended imaging technology, and in particular to a fluorescent imaging film, an anti-counterfeiting product, and a method for manufacturing the fluorescent imaging film. Background Art

[0002] With the continuous improvement of packaging and printing anti-counterfeiting technology, the application of fluorescent inks has received more and more attention. Fluorescent ink is one of the most widely used inks in ticket printing, and its main component is fluorescent pigment. Fluorescent pigments are functional luminescent pigments. Under the irradiation of external light (including ultraviolet light), they can absorb a certain form of energy to excite photons and release the absorbed energy in the form of low visible light, thereby generating light of different hues and forming extremely bright color patterns.

[0003] Since fluorescent ink prints have good color rendering properties, fluorescent ink is used in many fields such as packaging printing and anti-counterfeiting printing. Specifically, the staff generally prints fluorescent ink on the surface of documents, tickets, tobacco, alcohol, and daily chemical packaging through various printing methods such as screen printing, offset printing, and gravure printing to form patterns.

[0004] However, the visual and anti-counterfeiting effects of the patterns formed on the surface of the object by printing are relatively poor. Summary of the invention

[0005] The embodiments of the present application provide a fluorescent imaging film, an anti-counterfeiting product and a method for manufacturing the fluorescent imaging film, which are used to solve the problem that the patterns formed on the surface of articles by printing in the prior art have poor visual and anti-counterfeiting effects.

[0006] In a first aspect, an embodiment of the present application provides a fluorescent imaging film, comprising: a fluorescent layer, a spacer layer and a lens layer;

[0007] The lens layer is arranged on one side of the spacer layer, and the lens layer includes a plurality of micro lenses arranged in an array;

[0008] The fluorescent layer is arranged on a side of the spacer layer facing away from the lens layer, the fluorescent layer comprises a plurality of fluorescent parts arranged in an array, a fluorescent pattern microstructure is arranged in the fluorescent part, and the fluorescent pattern microstructure is filled with fluorescent material;

[0009] Each microlens is provided corresponding to each fluorescent portion.

[0010] In a feasible implementation, a reflective layer is provided on the surface of the lens layer facing away from the spacer layer;

[0011] The material of the reflective layer includes at least one of aluminum, indium, titanium dioxide and silicon dioxide.

[0012] In a feasible implementation, the fluorescent pattern microstructure is a recessed structure having a bottom and multiple sides, and the cross-section of the recessed structure is rectangular or trapezoidal; the depth of the fluorescent pattern microstructure is 1 μm-5 μm, and the width is 3 μm-50 μm.

[0013] In a feasible implementation, when the fluorescent imaging film presents an array magnification dynamic suspension effect, the thickness of the spacer layer satisfies the focal length range of the microlens;

[0014] When the fluorescent imaging film presents a single image suspension effect, the thickness of the spacer layer is greater than the focal length of the microlens.

[0015] In a feasible implementation, the fluorescent imaging film further includes a micro-nano structure, which is configured on a side of the spacer layer facing away from the fluorescent layer, and is disposed around the microlens;

[0016] Alternatively, the micro-nano structure is configured on a side of the spacer layer facing away from the lens layer, and the micro-nano structure is arranged around the fluorescent portion.

[0017] In a feasible implementation, a coating is provided on a surface of the micro-nano structure facing away from the spacer layer;

[0018] And / or, a coating layer is provided on a surface of the fluorescent layer on a side facing away from the spacing layer;

[0019] The material of the coating includes at least one of aluminum, indium, titanium dioxide, zinc sulfide and silicon dioxide.

[0020] In one feasible implementation, the micro-nano structures are arranged according to the Fresnel law to present a three-dimensional relief effect;

[0021] The period of the micro-nano structure is 2μm-20μm, the depth is 3μm-10μm, and the cross section is a continuous arch or triangle.

[0022] In a feasible implementation, the micro-nano structure presents a platinum dynamic light and shadow effect; the period of the micro-nano structure is 10μm-200μm, the depth is 3μm-20μm, and the cross section is an arch, a triangle, or a trapezoid;

[0023] The gap between adjacent micro-nano structures is 2 μm-50 μm.

[0024] In a feasible implementation, the micro-nano structure presents a laser dynamic light and shadow effect; the period of the micro-nano structure is 300nm-2μm, the depth is 30nm-500nm period, and the cross-section is a sinusoidal waveform.

[0025] In a second aspect, an embodiment of the present application provides an anti-counterfeiting product, comprising a laminated substrate layer, a release layer, and a fluorescent imaging film as described in the first aspect.

[0026] In a third aspect, the present application provides a method for manufacturing a fluorescent imaging film, which is used to manufacture the fluorescent imaging film of the first aspect, comprising:

[0027] A fluorescent layer is prepared on one side of the base film layer, wherein the fluorescent layer includes a plurality of fluorescent parts arranged in an array, a fluorescent pattern microstructure is provided in the fluorescent part, and a fluorescent material is filled in the fluorescent pattern microstructure;

[0028] A spacer layer is prepared on the side of the fluorescent layer facing away from the base film layer;

[0029] A lens layer is prepared on the side of the spacer layer facing away from the fluorescent layer. The lens layer includes a plurality of micro lenses arranged in an array, and each micro lens is arranged corresponding to each fluorescent portion.

[0030] In a feasible implementation, the manufacturing method further includes:

[0031] A reflective layer is arranged on the surface of the microlens facing away from the spacer layer.

[0032] In a feasible implementation, preparing a fluorescent layer on one side of the base film layer includes:

[0033] preparing a release layer on one side of the base film layer;

[0034] A fluorescent layer is prepared on the side of the release layer facing away from the base film layer;

[0035] The release layer is used to finally peel off the base film layer.

[0036] In a feasible implementation, the manufacturing method further includes:

[0037] Prepare a micro-nano structure on the side of the spacer layer facing away from the fluorescent layer;

[0038] The micro-nano structure is arranged around the micro-lens.

[0039] In a feasible implementation, the manufacturing method further includes:

[0040] A micro-nano structure is prepared on a side of the spacer layer facing away from the lens layer, and a coating is provided on a side of the micro-nano structure facing away from the spacer layer;

[0041] The micro-nano structure is arranged around the fluorescent part.

[0042] In a feasible implementation, the manufacturing method further includes:

[0043] Disposing a coating on the side of the micro-nano structure facing away from the spacer layer;

[0044] And / or, a coating layer is provided on the side of the fluorescent layer facing away from the spacer layer.

[0045] In a feasible implementation, and / or, the fluorescent material is fluorescent ink;

[0046] and / or, preparing a fluorescent layer on one side of the base film layer by UV transfer;

[0047] And / or, the lens layer is prepared by UV transfer on the side of the spacer layer facing away from the fluorescent layer.

[0048] In the first aspect, the embodiment of the present application provides a fluorescent imaging film, including a fluorescent layer, a spacer layer and a lens layer. Among them, the lens layer is arranged on one side of the spacer layer, and the lens layer includes a plurality of microlenses arranged in an array; the fluorescent layer is arranged on the side of the spacer layer facing away from the lens layer, and the spacer layer is used to separate the fluorescent layer and the lens layer so that the distance from the fluorescent layer to the lens layer meets the transmission focal length. The fluorescent layer includes a plurality of fluorescent parts arranged in an array, and a fluorescent pattern microstructure is arranged in the fluorescent part, and the fluorescent pattern microstructure is filled with fluorescent material. Each microlens is arranged corresponding to each fluorescent part. After being reflected, the light irradiated on the fluorescent pattern microstructure passes through the fluorescent part and the microlens of the fluorescent layer in sequence and then is emitted, forming an enlarged, fluorescent and suspended image on the microlens side. The fluorescent imaging film enables people to observe the fluorescent and suspended image under light, and obtains rich visual effects and excellent anti-counterfeiting effects.

[0049] On the second aspect, the embodiments of the present application provide an anti-counterfeiting product, comprising a laminated substrate layer, a release layer and a fluorescent imaging film in any technical solution, and thus having all the beneficial effects of the fluorescent imaging film in any of the above technical solutions, which will not be repeated here.

[0050] In a third aspect, an embodiment of the present application provides a method for manufacturing a fluorescent imaging film, which is used to manufacture a fluorescent imaging film. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0052] In the attached picture:

[0053] Figure 1 is a schematic diagram of a fluorescent imaging film provided in the first embodiment of the present application;

[0054] Figure 2 is a schematic diagram of a fluorescent imaging film provided in a second embodiment of the present application;

[0055] Figure 3 is a schematic diagram of a fluorescent imaging film provided in a third embodiment of the present application;

[0056] Figure 4 is a schematic diagram of a fluorescent imaging film provided in a fourth embodiment of the present application;

[0057] Figure 5 is a schematic diagram of a fluorescent imaging film provided in a fifth embodiment of the present application;

[0058] Figure 6 is a schematic diagram of a fluorescent imaging film provided in a sixth embodiment of the present application;

[0059] Figure 7 is a schematic diagram of a fluorescent imaging film provided in the seventh embodiment of the present application;

[0060] Figure 8 is a schematic diagram of a fluorescent imaging film provided in an eighth embodiment of the present application;

[0061] Fig. 9 is a schematic diagram of a fluorescent imaging film provided in the ninth embodiment of the present application;

[0062] Fig.10 is a schematic diagram of a fluorescent imaging film provided in the ninth embodiment of the present application;

[0063] Fig.11 yes Figure 6 Schematic diagram of the structure during the production process of the fluorescent imaging film;

[0064] Fig.12 yes Fig. 9 Schematic diagram of the structure during the production process of the fluorescent imaging film;

[0065] Fig.13 It is a flow chart of a method for manufacturing a fluorescent imaging film provided in one embodiment of the present application;

[0066] Fig.14 This is a flow chart of a method for manufacturing a fluorescent imaging film provided in another embodiment of the present application.

[0067] Description of reference numerals:

[0068] 100-fluorescent layer; 200-spacer layer; 300-lens layer; 400-micro-nano structure; 500-reflective layer; 600-release layer; 700-base film layer; 800-suspended image; 900-plating layer;

[0069] 110-fluorescent part; 310-microlens. DETAILED DESCRIPTION

[0070] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0071] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0072] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] To facilitate the technical solution of the application, some concepts involved in the application are first explained below.

[0075] With the continuous improvement of packaging and printing anti-counterfeiting technology, the application of fluorescent inks has received more and more attention. Fluorescent ink is one of the most widely used inks in ticket printing, and its main component is fluorescent pigment. Fluorescent pigments are functional luminescent pigments. Under the irradiation of external light (including ultraviolet light), they can absorb a certain form of energy to excite photons and release the absorbed energy in the form of low visible light, thereby generating light of different hues and forming extremely bright color patterns.

[0076] Since fluorescent ink prints have good color rendering properties, fluorescent ink is used in many fields such as packaging printing and anti-counterfeiting printing. Specifically, workers generally print fluorescent ink on the surface of documents, tickets, tobacco, alcohol, and daily chemical packaging through various printing methods such as screen printing, offset printing, and gravure printing to form patterns.

[0077] However, the visual and anti-counterfeiting effects of the patterns formed on the surface of the object by printing are relatively poor.

[0078] In order to solve the above problems, the embodiment of the present application provides a fluorescent imaging film and a method for making the same. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the accompanying drawings of the specification.

[0079] Figure 1 It is a schematic diagram of the fluorescent imaging film provided in the first embodiment of the present application.

[0080] First, reference Figure 1 As shown, the embodiment of the present application provides a fluorescent imaging film, including a fluorescent layer 100, a spacer layer 200 and a lens layer 300. Among them, the lens layer 300 is arranged on one side of the spacer layer 200, and the fluorescent layer 100 is arranged on the side of the spacer layer 200 facing away from the lens layer 300, that is, the lens layer 300 is respectively arranged on two opposite sides of the spacer layer 200. The spacer layer 200 is a transparent material, which is used to separate the fluorescent layer 100 from the lens layer 300, and to bear the structure and transmit light to form an observation area. Exemplarily, the material of the spacer layer 200 can be PET or PC.

[0081] The lens layer 300 is used to magnify the image in the fluorescent layer 100, and includes a plurality of micro lenses 310 arranged in an array, and the micro lenses 310 are convex lenses. The thickness of the spacer layer 200 needs to be slightly larger than the reflection focal length of the micro lenses 310, so as to magnify the image in the fluorescent layer 100.

[0082] The lens layer 300 includes a plurality of microlenses 310 arranged in an array, and the fluorescent layer 100 also includes a plurality of fluorescent parts 110 arranged in an array. The fluorescent parts 110 are provided with fluorescent pattern microstructures, and the fluorescent pattern microstructures are filled with fluorescent materials. Each microlens 310 is arranged corresponding to each fluorescent part 110, so that the microlens 310 can amplify the fluorescent pattern microstructure in the fluorescent part 110, so that people can observe the amplified, fluorescent and suspended image, thereby enriching the visual effect and improving the anti-counterfeiting effect.

[0083] Specifically, the light irradiated on the fluorescent pattern microstructure is reflected and then sequentially passes through the fluorescent portion 110 of the fluorescent layer 100 and the microlens 310 and then is emitted, forming an amplified, fluorescent and suspended virtual image on the side close to the microlens 310, that is, people can observe the fluorescent and suspended image produced by the fluorescent imaging film under light, and obtain rich visual effects and excellent anti-counterfeiting effects. It is understandable that the fluorescent pattern microstructure can be set to different shapes or different colors according to needs. Exemplarily, the fluorescent material can be fluorescent ink; in addition, the fluorescent ink can be organic fluorescent ink or inorganic fluorescent ink, which can form colored fluorescent ink or colorless fluorescent ink or color-changing fluorescent ink.

[0084] In some examples, the fluorescent pattern microstructure is a recessed structure having a bottom and multiple sides, each recessed structure has a rectangular or trapezoidal cross-section, a depth of 1um-5um, a width of 3um-50um, and is a recessed structure having a bottom and multiple sides, and the recessed structure is filled with fluorescent ink.

[0085] In other words, the lens layer 300 is provided with a plurality of microlenses 310, and the plurality of microlenses 310 are distributed in an array; correspondingly, the fluorescent layer 100 is provided with a plurality of fluorescent parts 110, and the plurality of fluorescent parts 110 are distributed in an array, and each fluorescent part 110 corresponds to the position of each microlens 310. The distance between two adjacent fluorescent parts 110 is equal to the distance between two adjacent microlenses 310, and each fluorescent part 110 is provided corresponding to each microlens 310 with a spacing layer 200 therebetween. The image observation viewing angle of the transmission type fluorescent imaging film is the lens layer 300 side, and people can observe the magnified, fluorescent and suspended image from the lens layer 300 side.

[0086] Figure 2 Schematic diagram of the fluorescent imaging film provided by the second embodiment of the present application. Figure 2 As shown, the fluorescent imaging film is a reflective fluorescent imaging film, and the reflective layer 500 is arranged on the surface of the microlens 310 facing away from the spacer layer 200, so as to reflect the light irradiated on the reflective layer 500. After being reflected by the reflective layer 500, the light passes through the microlens 310 and the fluorescent part 110 of the fluorescent layer 100 and then is emitted, forming an enlarged, fluorescent and suspended image on one side of the fluorescent layer 100. The image observation viewing angle of the reflective fluorescent imaging film is the side of the fluorescent layer 100, and people can observe the enlarged, fluorescent and suspended image from the side of the fluorescent layer 100.

[0087] Figure 3 is a schematic diagram of a fluorescent imaging film provided in a third embodiment of the present application; Figure 4 is a schematic diagram of a fluorescent imaging film provided in a fourth embodiment of the present application; Figure 5 is a schematic diagram of a fluorescent imaging film provided in a fifth embodiment of the present application; Figure 6 It is a schematic diagram of the fluorescent imaging film provided in the sixth embodiment of the present application.

[0088] Reference Figure 3-Figure 6 As shown, in some examples, in order to enhance the display effect of the suspended image 800, based on the above embodiment, the fluorescent imaging film further includes a micro-nano structure 400. Exemplarily, the micro-nano structure 400 can be arranged around the microlens 310 or around the fluorescent part.

[0089] For example, refer to Figure 3 and Figure 4 As shown, in the transmission type fluorescent imaging film, the micro-nano structure 400 can be disposed on the spacer layer 200 and located around the fluorescent portion 110 .

[0090] For example, refer to Figure 5 and Figure 6 As shown, in the reflective fluorescent imaging film, the micro-nano structure 400 is arranged on the spacer layer 200 and is located around the microlens 310, and a reflective layer 500 is arranged on the surface of the microlens 310 facing away from the spacer layer 200. In this case, it is a reflective fluorescent imaging film.

[0091] Exemplarily, the micro-nano structure 400 may be in at least one of the following forms: The first micro-nano structure 400 has a period of 2um-20um, a continuous arch or triangle cross section, a depth of 3um-10um, and is arranged according to the Fresnel law, which can present a three-dimensional relief effect.

[0092] The period of the second micro-nano structure 400 is 10um-200um, and its cross-section is arched, triangular or trapezoidal, with a depth of 3um-20um. There is a gap of 2um-50um between adjacent grooves, which can present a platinum dynamic light and shadow effect.

[0093] The third type of micro-nano structure 400 has a period of 300nm-2um, a depth of 30mm-500mm, and a cross section of a sinusoidal wavelength, which can present laser dynamic light and shadow effects.

[0094] The image effect formed by the micro-nano structure 400 is different from the image effect of the fluorescent part 110 in the fluorescent layer 100, thereby realizing the integration of multiple effects, including the effect of fluorescent film imaging, and one or more of the effects of three-dimensional relief effect, platinum dynamic light and shadow, and laser dynamic optical effect. Figure 7 is a schematic diagram of a fluorescent imaging film provided in the seventh embodiment of the present application; Figure 8 is a schematic diagram of a fluorescent imaging film provided in an eighth embodiment of the present application; Fig. 9 is a schematic diagram of a fluorescent imaging film provided in the ninth embodiment of the present application; Fig.10It is a schematic diagram of the fluorescent imaging film provided in the ninth embodiment of the present application.

[0095] Reference Figure 7-10 As shown, in some examples, a coating layer 900 is disposed on the side of the micro-nano structure 400 facing away from the spacer layer 200 to increase the brightness of the micro-nano structure 400. The coating layer 900 may also cover the fluorescent layer 100 to brighten the fluorescent imaging film.

[0096] In addition, refer to Fig. 9 As shown, when the fluorescent imaging film is a reflective fluorescent imaging film, a suspended image 800 is formed on one side of the fluorescent layer 100 .

[0097] On the second aspect, the embodiments of the present application provide an anti-counterfeiting product, comprising a laminated substrate layer, a release layer and a fluorescent imaging film in any technical solution, and thus having all the beneficial effects of the fluorescent imaging film in any of the above technical solutions, which will not be repeated here.

[0098] In a third aspect, the embodiment of the present application provides an anti-counterfeiting product, comprising a laminated substrate layer, a release layer, and the fluorescent imaging film described in the first aspect. The substrate layer may be made of PET or PC. Since the anti-counterfeiting product includes the fluorescent imaging film described above, it includes all the effects of the fluorescent imaging film described above, which will not be described in detail here.

[0099] In a third aspect, an embodiment of the present application provides a method for manufacturing a fluorescent imaging film, which is used to manufacture the fluorescent imaging film as described in the first aspect.

[0100] Specifically, there are different manufacturing methods for the reflective fluorescent imaging film and the transmissive fluorescent imaging film.

[0101] Fig.11 yes Figure 6 Schematic diagram of the structure during the production process of the fluorescent imaging film; Fig.13 It is a flow chart of a method for manufacturing a fluorescent imaging film provided in one embodiment of the present application.

[0102] For the preparation method of reflective fluorescent imaging film, refer to Fig.11 and Fig.13 The manufacturing method comprises:

[0103] S110: A fluorescent layer 100 is prepared on one side of the base film layer 700. Exemplarily, the fluorescent layer 100 is prepared on one side of the base film layer 700 by UV transfer. The fluorescent layer 100 includes a plurality of fluorescent portions 110 arranged in an array, and a fluorescent pattern microstructure is provided in the fluorescent portion 110. The fluorescent pattern microstructure is filled with a fluorescent material; the fluorescent material may be a fluorescent ink. The fluorescent ink may be an organic fluorescent ink or an inorganic fluorescent ink, and may be a colored fluorescent ink, a colorless fluorescent ink, or a color-changing fluorescent ink.

[0104] The fluorescent pattern microstructure can be set to different shapes according to requirements. In some examples, the fluorescent pattern microstructure is a concave structure with a bottom and multiple sides, the cross section of the concave structure is rectangular or trapezoidal, the depth is 1um-5um, the width is 3um-50um, and the concave structure is filled with fluorescent ink.

[0105] It should be noted that the UV transfer process is also called UV perfusion process or UV coating process. It uses the non-stick properties of UV transfer glue and metal to transfer various pattern effects to PET, PC or PMMA sheets through the UV transfer process. It uses ultraviolet rays to transfer the printed pattern to the surface of the object, making the printed content clearer, wear-resistant, water-resistant and pollution-resistant. UV transfer technology can be used to print transparent and opaque objects, including metal, plastic, glass, paper and leather. Compared with traditional printing technology, UV transfer technology is simpler and faster, and can also improve printing quality.

[0106] In some examples, in order to facilitate the peeling of the base film layer 700 and the fluorescent layer 100, a release layer 600 may be prepared between the base film layer 700 and the fluorescent layer 100. The structure after the preparation can refer to Fig.11 As shown, for example, the release layer 600 is first prepared on one side of the base film layer 700, and then the fluorescent layer 100 is prepared on the side of the release layer 600 facing away from the base film layer 700 by UV transfer technology.

[0107] S120: Prepare a spacer layer 200 on the side of the fluorescent layer 100 facing away from the base film layer 700 to separate the fluorescent layer 100 from the lens layer 300, and form an observation area through the supporting structure and light transmission. The spacer layer 200 is made of a transparent material, for example, PET or PC.

[0108] S130: preparing a lens layer 300 on the side of the spacer layer 200 facing away from the fluorescent layer 100. Exemplarily, the lens layer 300 is prepared by UV transfer technology on the side of the spacer layer 200 facing away from the fluorescent layer 100, and the lens layer 300 includes a plurality of microlenses 310 arranged in an array, and each microlens 310 is arranged corresponding to each fluorescent portion 110 in the fluorescent layer 100. In addition, it should be noted that the thickness of the spacer layer 200 can meet the reflection focal length of the microlens 310, so that it can magnify the fluorescent pattern microstructure in the fluorescent portion 110.

[0109] In other words, the lens layer 300 includes a plurality of microlenses 310 , and the fluorescent layer 100 includes a plurality of fluorescent portions 110 . The plurality of microlenses 310 are distributed in an array, and the plurality of fluorescent portions 110 are also distributed in an array. Each microlens 310 is disposed correspondingly to each fluorescent portion 110 .

[0110] In some examples, the method for making the fluorescent imaging film further includes:

[0111] S140: a micro-nano structure 400 is arranged around the micro-lens 310 of the lens layer 300. In order to enrich the display effect of the image, the micro-nano structure 400 may be arranged around the micro-lens 310. Exemplarily, the micro-nano structure 400 may be prepared on the spacer layer 200 by UV transfer technology, and the micro-nano structure 400 is located around the micro-lens 310. A coating 900 may be arranged on the surface of the micro-nano structure 400 to achieve a brightening effect, and the material of the coating 900 includes at least one of aluminum, titanium dioxide, silicon dioxide, zinc sulfide or indium.

[0112] Exemplarily, the micro-nano structure 400 may be at least one of the following forms. The first micro-nano structure 400 has a period of 2um-20um, a continuous arch or triangle cross section, a depth of 3um-10um, and is arranged according to the Fresnel law, which can present a three-dimensional relief effect. The second micro-nano structure 400 has a period of 10um-200um, a groove cross section of an arch, triangle or trapezoid, a depth of 3um-20um, and a gap of 2um-50um between adjacent grooves, which can present a platinum dynamic light and shadow effect. The third micro-nano structure 400 has a period of 300nm-2um, a depth of 30mm-500mm, and a groove cross section of a sine wavelength, which can present a laser dynamic light and shadow effect. The image effect formed by the micro-nano structure 400 is different from the image effect of the fluorescent part 110 in the fluorescent layer 100, thereby realizing the integration of multiple effects, including the effect of fluorescent film imaging, and one or more of the effects of three-dimensional relief effect, platinum dynamic light and shadow, and laser dynamic optics.

[0113] The method for preparing the fluorescent imaging film also includes:

[0114] S150: a reflective layer 500 is disposed on the surface of the microlens 310. The coating 900 can be prepared by evaporation or vacuum sputtering on the surface of the microlens 310 facing away from the spacer layer 200. The reflective layer 500 is disposed on the surface of the microlens 310 to form a reflective fluorescent imaging film.

[0115] In addition, it should be noted that the material of the reflective layer 500 can be at least one of aluminum, titanium dioxide, silicon dioxide or indium, and the thickness can be 80nm-260nm. In some examples, in order to obtain the best brightness enhancement and light reflection effect, the thickness of the reflective layer 500 is 140nm.

[0116] S160: Peeling off the release layer 600 and the base film layer 700. After peeling off the release layer 600 and the base film layer 700, the preparation of the reflective fluorescent imaging film is completed.

[0117] Fig.12 yes Fig. 9 Schematic diagram of the structure during the production process of the fluorescent imaging film; Fig.14 This is a flow chart of a method for manufacturing a fluorescent imaging film provided in another embodiment of the present application.

[0118] For the preparation method of transmission fluorescent imaging film, refer to Fig.12 and Fig.14 The manufacturing method comprises:

[0119] S210: preparing a fluorescent layer 100 on one side of the base film layer 700. Exemplarily, the fluorescent layer 100 is prepared on one side of the base film layer 700 by UV transfer.

[0120] The fluorescent layer 100 includes a plurality of fluorescent parts 110 arranged in an array, wherein a fluorescent pattern microstructure is provided in the fluorescent part 110, and a fluorescent material is filled in the fluorescent pattern microstructure; the fluorescent material may be fluorescent ink. The fluorescent ink may be an organic fluorescent ink or an inorganic fluorescent ink, and may be a colored fluorescent ink, a colorless fluorescent ink, or a color-changing fluorescent ink.

[0121] The fluorescent pattern microstructure can be set to different shapes according to requirements. In some examples, the fluorescent pattern microstructure is a concave structure with a bottom and multiple sides, the cross section of the concave structure is rectangular or trapezoidal, the depth is 1um-5um, the width is 3um-50um, and it is a concave structure with a bottom and multiple sides, and the concave structure is filled with fluorescent ink.

[0122] It should be noted that the UV transfer process is also called UV perfusion process or UV coating process. It uses the non-stick properties of UV transfer glue and metal to transfer various pattern effects to PET, PC or PMMA sheets through the UV transfer process. It uses ultraviolet rays to transfer the printed pattern to the surface of the object, making the printed content clearer, wear-resistant, water-resistant and pollution-resistant. UV transfer technology can be used to print transparent and opaque objects, including metal, plastic, glass, paper and leather.

[0123] In addition, in some examples, in order to facilitate the peeling of the base film layer 700 and the fluorescent layer 100, a release layer 600 may be prepared between the base film layer 700 and the fluorescent layer 100. The structure after the preparation can refer to Fig.11 As shown, for example, the release layer 600 is first prepared on one side of the base film layer 700, and then the fluorescent layer 100 is prepared on the side of the release layer 600 facing away from the base film layer 700 by UV transfer technology.

[0124] S220: Prepare a micro-nano structure 400 around the fluorescent part 110 of the fluorescent layer 100. In order to enhance the display effect of the image, the micro-nano structure 400 may be arranged around the fluorescent part 110. Exemplarily, the micro-nano structure 400 may be prepared around the fluorescent part 110 by UV transfer technology. The micro-nano structure 400 can form a sharp contrast with the image in the fluorescent part 110, thereby enhancing the display effect of the image.

[0125] Exemplarily, the micro-nano structure 400 may be at least one of the following forms. The first micro-nano structure 400 has a period of 2um-20um, a groove cross-section of a continuous arch or triangle, a depth of 3um-10um, and is arranged according to the Fresnel law, which can present a three-dimensional relief effect. The second micro-nano structure 400 has a period of 10um-200um, a groove cross-section of an arch, triangle or trapezoid, a depth of 3um-20um, and a gap of 2um-50um between adjacent grooves, which can present a platinum dynamic light and shadow effect. The third micro-nano structure 400 has a period of 300nm-2um, a depth of 30mm-500mm, and a groove cross-section of a sine wavelength, which can present a laser dynamic light and shadow effect. S230: Prepare a spacer layer 200 on the side of the fluorescent layer 100 facing away from the base film layer 700 to separate the fluorescent layer 100 from the lens layer 300, and the bearing structure and light transmission form an observation area. The spacer layer 200 is made of a transparent material, for example, PET or PC.

[0126] S240: preparing a lens layer 300 on the side of the spacer layer 200 facing away from the fluorescent layer 100. Exemplarily, the lens layer 300 is prepared by UV transfer technology on the side of the spacer layer 200 facing away from the fluorescent layer 100, and the lens layer 300 includes a plurality of micro lenses 310 arranged in an array, and each micro lens 310 is arranged corresponding to each fluorescent portion 110. In addition, it should be noted that the thickness of the spacer layer 200 can meet the reflection focal length of the micro lens 310, so that it can magnify the fluorescent pattern microstructure in the fluorescent portion 110.

[0127] In other words, the lens layer 300 includes a plurality of microlenses 310 , and the fluorescent layer 100 includes a plurality of fluorescent portions 110 . The plurality of microlenses 310 are distributed in an array, and the plurality of fluorescent portions 110 are also distributed in an array. Each microlens 310 is disposed correspondingly to each fluorescent portion 110 .

[0128] S250 : peeling off the release layer 600 and the base film layer 700 .

[0129] S260: a coating layer 900 is provided on the surface of the fluorescent layer 100 and / or the surface of the micro-nano structure 400. For example, after the release layer 600 and the base film layer 700 are peeled off, the coating layer 900 can be prepared on the surface of the fluorescent layer 100 facing away from the spacer layer 200 and / or on the surface of the micro-nano structure 400 facing away from the spacer layer 200 by evaporation or vacuum sputtering, thereby finally completing the production of the transmission type fluorescent imaging film.

[0130] The coating 900 disposed on the surface of the micro-nano structure 400 and the surface of the fluorescent layer 100 can have a brightening effect on the imaging. Exemplarily, the material of the coating 900 may include at least one of aluminum, titanium dioxide, silicon dioxide, zinc sulfide or indium.

[0131] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0132] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A fluorescent imaging film, characterized in that: include: A fluorescent layer (100), a spacer layer (200) and a lens layer (300); The lens layer (300) is arranged on one side of the spacer layer (200), and the lens layer (300) comprises a plurality of micro lenses (310) arranged in an array; The fluorescent layer (100) is arranged on a side of the spacer layer (200) facing away from the lens layer (300), the fluorescent layer (100) comprises a plurality of fluorescent parts (110) arranged in an array, a fluorescent pattern microstructure is arranged in the fluorescent part (110), and the fluorescent pattern microstructure is filled with fluorescent material; Each of the microlenses (310) is arranged corresponding to each of the fluorescent parts (110).

2. The fluorescent imaging film according to claim 1, characterized in that: A reflective layer (500) is provided on the surface of the lens layer (300) facing away from the spacer layer (200); The material of the reflective layer (500) includes at least one of aluminum, indium, titanium dioxide and silicon dioxide.

3. The fluorescent imaging film according to claim 1 or 2, characterized in that: The fluorescent pattern microstructure is a concave structure with a bottom and multiple sides, and the cross section of the concave structure is rectangular or trapezoidal; the depth of the fluorescent pattern microstructure is 1 μm-5 μm, and the width is 3 μm-50 μm.

4. The fluorescent imaging film according to claim 1 or 2, characterized in that: When the fluorescent imaging film presents an array magnification dynamic suspension effect, the thickness of the spacer layer (200) satisfies the focal length range of the microlens (310); When the fluorescent imaging film presents a single image suspension effect, the thickness of the spacer layer (200) is greater than the focal length of the microlens (310).

5. The fluorescent imaging film according to claim 1 or 2, characterized in that: The fluorescent imaging film further comprises a micro-nano structure (400), wherein the micro-nano structure (400) is configured on a side of the spacer layer (200) facing away from the fluorescent layer (100), and the micro-nano structure (400) is arranged around the microlens (310); Alternatively, the micro-nano structure (400) is configured on a side of the spacer layer (200) facing away from the lens layer (300), and the micro-nano structure (400) is disposed around the fluorescent portion (110).

6. The fluorescent imaging film according to claim 5, characterized in that: A coating layer (900) is provided on a surface of the micro-nano structure (400) that is opposite to the spacer layer (200); And / or, the coating layer (900) is provided on a surface of the fluorescent layer (100) that is opposite to the spacer layer (200); The material of the coating (900) includes at least one of aluminum, indium, titanium dioxide, zinc sulfide and silicon dioxide.

7. The fluorescent imaging film according to claim 5, characterized in that: The micro-nano structure (400) is arranged according to the Fresnel law to present a three-dimensional relief effect; the period of the micro-nano structure (400) is 2 μm-20 μm, the depth is 3 μm-10 μm, and the cross section is a continuous arch or triangle.

8. The fluorescent imaging film according to claim 5, characterized in that: The micro-nano structure (400) presents a platinum dynamic light and shadow effect; the period of the micro-nano structure (400) is 10 μm-200 μm, the depth is 3 μm-20 μm, and the cross section is an arch, a triangle, or a trapezoid; The gap between adjacent micro-nano structures (400) is 2 μm-50 μm.

9. The fluorescent imaging film according to claim 5, characterized in that: The micro-nano structure (400) presents a laser dynamic light and shadow effect; the period of the micro-nano structure (400) is 300nm-2μm, the depth is 30nm-500nm period, and the cross section is a sine wave.

10. An anti-counterfeiting product, characterized in that: The invention comprises a laminated substrate layer, a release layer and the fluorescent imaging film as claimed in any one of claims 1 to 9.

11. A method for preparing a fluorescent imaging film, characterized in that: Used to prepare the fluorescent imaging film according to any one of claims 1 to 9, comprising: A fluorescent layer (100) is prepared on one side of the base film layer (700), wherein the fluorescent layer (100) comprises a plurality of fluorescent parts (110) arranged in an array, wherein a fluorescent pattern microstructure is provided in the fluorescent part (110), and a fluorescent material is filled in the fluorescent pattern microstructure; A spacer layer (200) is prepared on the side of the fluorescent layer (100) facing away from the base film layer (700); A lens layer (300) is prepared on the side of the spacer layer (200) facing away from the fluorescent layer (100), wherein the lens layer (300) comprises a plurality of micro lenses (310) arranged in an array, and each of the micro lenses (310) is arranged corresponding to each of the fluorescent portions (110).

12. The method for producing a fluorescent imaging film according to claim 11, characterized in that: The production method also includes: A reflective layer (500) is disposed on the surface of the microlens (310) facing away from the spacer layer (200).

13. The method for producing a fluorescent imaging film according to claim 11, characterized in that: The step of preparing the fluorescent layer (100) on one side of the base film layer (700) further comprises: Preparing a release layer (600) on one side of the base film layer (700); Preparing a fluorescent layer (100) on the side of the release layer (600) facing away from the base film layer (700); The release layer (600) is used to finally peel off the base film layer (700).

14. The method for producing a fluorescent imaging film according to claim 12, characterized in that: The production method further comprises: Preparing a micro-nano structure (400) on a side of the spacer layer (200) facing away from the fluorescent layer (100); Wherein, the micro-nano structure (400) is arranged around the microlens (310).

15. The method for producing a fluorescent imaging film according to claim 12, characterized in that: The production method further comprises: Preparing a micro-nano structure (400) on a side of the spacer layer (200) facing away from the lens layer (300); Wherein, the micro-nano structure (400) is arranged around the fluorescent part (110).

16. The method for producing a fluorescent imaging film according to claim 14 or 15, characterized in that: The production method further comprises: Disposing a coating (900) on a side of the micro-nano structure (400) facing away from the spacer layer (200); And / or, a coating layer (900) is provided on a side of the fluorescent layer (100) facing away from the spacer layer (200).

17. The method for producing a fluorescent imaging film according to claim 11, characterized in that: And / or, the fluorescent material is fluorescent ink; and / or, preparing a fluorescent layer (100) on one side of the base film layer (700) by UV transfer; And / or, a lens layer (300) is prepared on the side of the spacer layer (200) facing away from the fluorescent layer (100) by UV transfer.

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