Imaging film, image display element and preparation method thereof

Abstract

The invention discloses an imaging film, an image display element and a preparation method thereof. The imaging film forms a line-shaped suspension image in space, is of a layer structure, and comprises a substrate layer; an imaging layer; and a coating layer. Wherein the imaging layer is arranged on the substrate layer and comprises a concave cylindrical surface structure formed by one or more concave cylindrical surface mirrors and / or a negative Fresnel structure; and the coating layer is laminated on the imaging layer. According to the imaging film disclosed by the invention, a dynamic suspension image can be displayed under a single-layer structure, and meanwhile, the imaging film has a novel appearance effect.

Description

Technical Field

[0001] The present application relates to the field of material technology, and in particular to an imaging film having a novel image display effect, and an image display element having the imaging film. Background Art

[0002] In recent years, three-dimensional imaging technology has received increasing attention in the fields of information, display, medical treatment, and military. With the rapid development of manufacturing technology, suspended imaging technology has attracted more and more attention. In the prior art, suspended image imaging can be achieved by using microlens array magnification imaging. This technology uses microlens layers and pattern layers on the upper and lower surfaces of the substrate layer, and accurately positions the microlenses and micro-images to obtain the final imaging product. However, the implementation process is difficult, and the thickness of the prepared imaging product, such as an imaging film, may be relatively large. Summary of the invention

[0003] In order to solve the above problems, the present application discloses an imaging film and a preparation method thereof. The imaging film with a single-layer structure can present a dynamic suspended image and has a novel appearance effect. The preparation process is relatively easy and has a high yield rate.

[0004] One aspect of the present application provides an imaging film. The imaging film forms a linear suspended image in space, and is a layer structure, including: a base layer, an imaging layer and a coating layer. The imaging layer is arranged on the base layer, including a concave cylindrical structure composed of one or more concave cylindrical mirrors and / or a negative Fresnel structure; the coating layer is stacked on the imaging layer.

[0005] In a feasible implementation, when the concave cylindrical structure includes a concave cylindrical mirror, the width of the cross section of the concave cylindrical mirror is 1 mm-5 mm, and the depth is 10 μm-200 μm.

[0006] In a feasible implementation, the suspension height of the suspended image is equal to the focal length of the concave cylindrical mirror, and the focal length of the concave cylindrical mirror is 1 mm-5 mm.

[0007] In a feasible implementation, the curvatures corresponding to various points on the concave surface of the concave cylindrical mirror are the same or different.

[0008] In a feasible implementation, the suspension height of the suspended image is related to the width and depth of the cross section of the concave lens.

[0009] In a feasible implementation, when the concave cylindrical surface structure includes a negative Fresnel structure, the groove cross section is a continuously arranged right-angled inclined surface, the structure period is 2 μm-100 μm, and the depth is 1 μm-10 μm.

[0010] In a feasible implementation, the imaging layer includes concave cylindrical structures composed of negative Fresnel structures and convex cylindrical structures composed of Fresnel structures that are arranged at intervals.

[0011] In a feasible implementation, the imaging layer includes a concave cylindrical structure composed of a negative Fresnel structure and a convex cylindrical structure composed of a Fresnel structure, which are arranged at intervals, and a prism structure disposed on the negative Fresnel structure.

[0012] In a feasible implementation, the arrangement period of the prism structure is 100 μm-200 μm.

[0013] Another aspect of the present application discloses an image display element including the imaging film described above. Another aspect of the present application provides a method for preparing the imaging film. The imaging film forms a linear suspended image in space, which is a layer structure; the method comprises:

[0014] Providing a base layer; arranging an imaging layer on the base layer; and performing a coating operation on the imaging layer to stack a coating layer on the imaging layer.

[0015] The imaging film provided in this embodiment can form a suspended graphic track above a plane in a single-layer structure, showing a dynamic suspension effect and having a novel appearance effect. The difficulty of the preparation process is relatively low and the yield rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application will be further described in the form of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0017] Figure 1 is an exemplary schematic diagram of an imaging film according to some embodiments of the present application;

[0018] Figure 2 is a schematic diagram of exemplary parameters of a concave cylindrical structure according to some embodiments of the present application;

[0019] Figure 3 An exemplary schematic diagram of suspended imaging according to some embodiments of the present application;

[0020] Figure 4 Another exemplary schematic diagram of suspended imaging according to some embodiments of the present application;

[0021] Figure 5 Another exemplary schematic diagram of suspended imaging according to some embodiments of the present application;

[0022] Figure 6Another exemplary schematic diagram of suspended imaging according to some embodiments of the present application;

[0023] Figure 7 Another exemplary schematic diagram of suspended imaging according to some embodiments of the present application;

[0024] Figure 8 is an exemplary flow chart of a method for preparing an imaging film according to some embodiments of the present application. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] The terms "first" and "second" used in this document are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "and / or" or "and / or" used herein include any and all combinations of one or more related listed items.

[0029] Some embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the following description is for illustrative purposes and is not intended to limit the scope of protection of the present application.

[0030] Figure 1is an exemplary schematic diagram of an imaging film according to some embodiments of the present application. Figure 1 As shown, the imaging film 100 may include a base layer 110 , an imaging layer 120 and a coating layer 130 .

[0031] The base layer 110 can be used as a supporting element of the entire imaging film 100, and is used to support other layers. The material of the base layer 110 may include polyethylene terephthalate (PET), glass, polycarbonate (PC), polymethyl methacrylate (PMMA), polyimide (PI), transparent polyimide (CPI), etc. Optionally or preferably, the material of the base layer 110 may be PET. Since the imaging film 100 relies on the effect of light (including transmission, reflection, etc.) to perform imaging, the base layer 110 may be transparent. For example, the base layer 110 may be a transparent PET layer.

[0032] The imaging layer 120 can be disposed on the base layer 110. The base layer 110 has two surfaces disposed opposite to each other. For example, the upper surface is located above in the vertical direction, and the lower surface is located below. The imaging layer 120 can be disposed on any surface of the base layer 110, for example, the upper surface. The imaging layer 120 can include a concave cylindrical structure composed of one or more concave cylindrical mirrors and / or negative Fresnel structures. The concave cylindrical structure can be prepared using methods such as etching (for example, optical etching or chemical etching, etc.) and replication (for example, mold replication, etc.). For example, a layer of resin can be first laid on the upper surface of the base layer 110 to form a resin layer, and then a laser etching device can be used to etch the resin layer to remove excess resin to form a first microlens. Alternatively, a layer of ultraviolet curing glue (UV glue) is laid on the upper surface of the base layer 110, and then a mold (for example, a concave cylindrical mirror mold or a right-angle prism mold, etc.) is used to emboss the UV glue and perform ultraviolet light curing to finally form the concave cylindrical structure. As Figure 1 As shown, the imaging layer may be composed of a plurality of concave cylindrical mirrors, and the concave surface will face the opposite direction of the base layer 110. The width of the cross section of the concave cylindrical mirror is 1 mm-5 mm, and the depth is 10 μm-200 μm.

[0033] The concave cylindrical mirror can form a "focusing line" in space, so that the imaging film 100 can present a linear suspended image. Different types of concave cylindrical mirrors can achieve different shapes of lines. For example, a linear concave cylindrical mirror can form a straight line in space, a ring-shaped concave cylindrical mirror can form a ring in space, and a square concave cylindrical mirror can form a square line in space. By changing the type of concave cylindrical mirror and combining different types of concave cylindrical mirrors, various types of line images can be formed in space, or combined forms such as text, pattern outlines, etc. can be presented. For example, Figure 1The concave cylindrical structure shown in FIG. 1 is a simplest linear concave cylindrical mirror, which can form a straight line in space. For another example, a concave cylindrical structure composed of two annular concave cylindrical mirrors with different diameters can form a suspended image of concentric rings in space.

[0034] The focal length of the concave cylindrical mirror determines the suspension height of the line formed in space. Exemplarily, the focal length of the concave cylindrical mirror can be 1mm-5mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, etc., which can be the same as the suspension height of the line formed in space. It is understandable that during the preparation of the concave cylindrical mirror, the corresponding curvatures of each point in its concave surface can be made the same or different, thereby causing the change of the focal length of the concave cylindrical mirror. In this way, the suspension height of the straight line formed in space can be changed.

[0035] The suspended height of the line formed by the concave cylindrical mirror in space can also be related to the width and depth of the concave cylindrical mirror. Figure 2 , Figure 2 Schematic diagram of parameters of a concave cylindrical mirror according to some embodiments of the present application. The concave cylindrical mirror is a linear concave cylindrical mirror. Figure 2 The cross section thereof is shown in FIG. Wherein, the arc line represents the concave surface of the concave cylindrical mirror, D represents the cross section width, and h represents the concave depth. Then, the height H of the suspended image formed can satisfy the following formula:

[0036] H=(h 2 +D 2 / 4) / 4h

[0037] For example, assuming that the cross-sectional width D of the concave cylindrical mirror is 1 mm and the concave depth h is 50 μm, the concave cylindrical mirror can form a suspended straight line at a spatial height H of 1.25 mm.

[0038] Based on the above formula, we can know that the floating height of the suspended image is equal to the focal length of the concave cylindrical mirror. The lower the depth, the higher the corresponding floating height. Conversely, the higher the depth, the lower the corresponding floating height. Figure 3 , Figure 3 is an exemplary schematic diagram of a suspended image according to some embodiments of the present application. Figure 3 As shown, the structures of the two concave cylindrical mirrors on the left and right are linear, and the cross-sectional width D = 1mm. The concave depth of the left concave cylindrical mirror is 50μm, and the concave depth of the right concave cylindrical mirror changes gradually from 30μm to 50μm. Therefore, the height of the linear suspended image formed on the left is 1.25mm, while the right side will form a gradually rising linear suspended image with a height of 1.25mm-2mm.

[0039] The concave cylindrical structure on the imaging layer 120 may also be a negative Fresnel structure. Exemplarily, the negative Fresnel structure may be obtained by layering and projecting a real concave cylindrical mirror onto a plane. For example, the parameters of the real concave cylindrical mirror also satisfy the above formula, that is, H = (h 2 +D 2 / 4) / 4h. Reference Figure 4 , Figure 4 is an exemplary schematic diagram of another suspended image according to some embodiments of the present application, which shows a negative Fresnel structure obtained by projection of a circular real concave cylindrical mirror. Figure 4 As shown in (a), the concave column structure composed of the negative Fresnel structure forms a suspended image of a ring in space. Figure 4 As shown in (b), the groove cross section can be a continuously arranged right angle inclined surface. The blank space between the continuous inclined surface structures on both sides can correspond to the concave surface of a real concave cylindrical mirror. Figure 4 (c) shows a top view of a negative Fresnel structure. The dark part in the middle of the ring corresponds to the blank space in (b), and the two sides correspond to the continuous inclined surface in (b). In this example, the cross-sectional width of the concave cylindrical structure corresponding to the negative Fresnel structure is 5mm, the depth is 1μm-3μm, and the center diameter of the ring is 10mm. It can form a suspended circular ring line pattern at a spatial height of 2mm above the plane.

[0040] The negative Fresnel structure can also be projected by a real concave cylindrical mirror of other shapes, such as a square, various straight line segments, various curve segments or any combination thereof. Figure 5 The curved concave cylindrical mirror shown. Figure 5 is an exemplary schematic diagram of another suspended image according to some embodiments of the present application. Figure 5 In the negative Fresnel structure, an "S"-shaped line pattern can be presented in the air. Its specific structure can also be Figure 4 For example, there are also right-angled slopes arranged continuously on both sides, with a blank space in the middle to correspond to the concave surface of the concave cylindrical mirror. By changing the arrangement of the negative Fresnel structure on the base layer 110 to form a curve, a suspended image of the curve can be formed in the air. In this example, the cylindrical cross-section width of the negative Fresnel structure is 3mm-8mm, and the depth is 1μm-3μm, and a suspended "S"-shaped line pattern can be formed at a spatial height of 2mm-3mm above the plane.

[0041] The imaging layer 120 may also include a concave cylindrical surface structure composed of a negative Fresnel structure and a convex cylindrical surface structure composed of a Fresnel structure arranged at intervals. Figure 6 , Figure 6is an exemplary schematic diagram of another suspended image according to some embodiments of the present application, wherein the structure of the imaging layer 120 shown is a structure in which the negative Fresnel structure corresponding to the cylindrical surface of the tube and the Fresnel structure corresponding to the cylindrical surface of the ring are connected and arranged alternately. This structure can form a suspended image of concentric rings in the air, such as Figure 6 As shown in (a). Figure 6 The cross-sectional information of the structure is given in (b). Among them, the groove-shaped cross section is also a continuous right-angled slope. The left side is a negative Fresnel structure, close to the center side of the entire structure. The right side has a Fresnel structure, close to the outside of the entire structure. In this example, the cylindrical cross-section width corresponding to the negative Fresnel structure and the Fresnel structure is 3mm, and the depth is 1-3μm, which can form a suspended concentric ring line pattern at a spatial height of 2mm above the plane. The imaging layer 120 may also include a concave cylindrical structure composed of a negative Fresnel structure and a convex cylindrical structure composed of a Fresnel structure, which are arranged at intervals, as well as a short prism structure. The short prism structure is arranged on the negative Fresnel structure. Reference Figure 7 , Figure 7 is an exemplary schematic diagram of another suspended image according to some embodiments of the present application. Figure 7 As shown, the negative Fresnel structure cylinder and the Fresnel structure cylinder are arranged alternately to form a structure in which concave and convex cylinders are connected. The negative Fresnel structure is superimposed with a periodically arranged prism structure, with a prism period of 100μm-200μm, a cross-sectional width of 3mm, a structural period of 2μm-100μm, and a continuous slope structure with a depth of 1μm-3μm. A short prism structure is superimposed to form a diffraction grating, forming a suspended matte white concentric ring line pattern at a spatial height of 2mm above the plane.

[0042] When the imaging layer 120 includes a negative Fresnel structure, the structure period of the structure may be 2 μm-100 μm. For example, 2 μm, 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc. Its cross-sectional depth may be 1 μm-10 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-9 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-8 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-7 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-6 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-5 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-4 μm. Optionally or preferably, the cross-sectional depth may be 1 μm-3 μm. For example, 1 μm, 2 μm, 3 μm, etc.

[0043] The coating layer 130 may be stacked on the imaging layer 120. For example, it may be stacked on the outer surface of the concave cylindrical mirror, or on the hypotenuse and right-angled edge of the right-angled inclined surface of the negative Fresnel structure. In some examples, the coating layer 130 may be a metal film, such as an aluminum film, a chrome film, etc. Coating processes such as vacuum evaporation coating, vacuum particle sputtering, chemical vapor deposition, etc. may be used to form the coating layer 130 on the imaging layer 120.

[0044] The imaging film disclosed in the present application can display dynamic suspended images in a single-layer structure and has a novel appearance effect. The preparation process is relatively easy and the yield rate is high.

[0045] The application also discloses a method for preparing the imaging film. Figure 8 FIG. 1 is an exemplary flow chart of a method for preparing an imaging film according to some embodiments of the present application. Figure 8 As shown, process 800 may include the following operations.

[0046] Step 810, providing a base layer.

[0047] In some embodiments, the base layer can be used as a supporting element of the imaging film, and other elements for constituting the imaging film can be arranged on the base layer. The base layer can be made of polyethylene terephthalate (PET), glass, polycarbonate (PC), polymethyl methacrylate (PMMA), polyimide (PI), transparent polyimide (CPI), ultraviolet curing glue (UV glue), etc.

[0048] Step 820, disposing an imaging layer on the base layer.

[0049] In some embodiments, the base layer may have two surfaces arranged opposite to each other, such as upper and lower surfaces in the vertical direction. The imaging layer may be arranged on any one of the two surfaces. In some embodiments, the imaging layer may include a concave cylindrical structure composed of one or more concave cylindrical mirrors and / or negative Fresnel structures. Etching (e.g., optical etching or chemical etching, etc.), replication (e.g., mold replication, etc.) and other methods may be used to set the imaging layer on the base layer. For example, a layer of ultraviolet curing glue (UV glue) may be laid on the upper surface of the base layer, and then a mold (e.g., a concave cylindrical mirror mold or a right-angle prism mold, etc.) may be used to emboss the UV glue and perform ultraviolet light curing to finally form the concave cylindrical structure.

[0050] In some embodiments, the concave cylindrical structure may include a concave cylindrical mirror. The types of concave cylindrical mirrors may be various, for example, linear, circular, annular, square or any other type, or any combination of multiple types, which can form various types of linear suspended images in space. In some embodiments, the focal length of the concave cylindrical mirror may be 1mm-5mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, etc. The focal length may be equal to the height of the linear suspended image formed by the concave cylindrical mirror in space.

[0051] In some embodiments, the concave depths of the concave cylindrical mirrors may be the same or different. The same concave depth can make the levitation height of the suspended image consistent, while different concave depths can change the levitation height of the suspended image. For example, the shallower the concave depth, the higher the levitation height of the suspended image. And vice versa.

[0052] In some embodiments, the concave cylindrical structure may also include a negative Fresnel structure, which may be obtained by layering and projecting a real concave cylindrical mirror onto a plane. The groove cross section of the negative Fresnel structure may be a series of right-angled slopes.

[0053] In some embodiments, the imaging layer may further include a concave cylindrical surface structure composed of a negative Fresnel structure and a convex cylindrical surface structure composed of a Fresnel structure arranged at intervals. Alternatively, the imaging layer may further include a concave cylindrical surface structure composed of a negative Fresnel structure and a convex cylindrical surface structure composed of a Fresnel structure arranged at intervals, and a short prism structure. The short prism structure is disposed on the negative Fresnel structure.

[0054] In some embodiments, when the imaging layer includes a negative Fresnel structure, the structure period of the structure may be 2 μm-100 μm, and the cross-sectional depth may be 1 μm-10 μm. For example, the cross-sectional depth may be 1 μm-3 μm.

[0055] Step 830, performing a coating operation on the imaging layer to stack a coating layer on the imaging layer.

[0056] In some embodiments, the coating layer may be a metal film, such as an aluminum film, a chrome film, etc. Coating processes such as vacuum evaporation coating, vacuum particle sputtering, chemical vapor deposition, etc. may be used to form the coating layer on the imaging layer.

[0057] It should be noted that the above Figure 8 The description of each step in the embodiment is only for example and explanation, and does not limit the scope of application of this specification. For those skilled in the art, under the guidance of this specification, Figure 8Various modifications and changes may be made to the various steps in the present invention. However, these modifications and changes are still within the scope of this specification.

[0058] The present application also discloses an image display element. The image display element may include the above-mentioned imaging film. Exemplarily, the image display element may be, for example, an anti-counterfeiting product. For example, the anti-counterfeiting product is obtained by encapsulating the imaging film, such as plastic encapsulation.

[0059] The basic concepts have been described herein. It is obvious to those skilled in the art that the above detailed disclosure is merely an example and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to this specification. Such modifications, improvements and amendments are suggested in this specification, so such modifications, improvements and amendments still fall within the spirit and scope of the exemplary embodiments of this specification.

[0060] It should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0061] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0062] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. An imaging film, characterized in that: The imaging film forms a linear suspended image in space, and has a layer structure, including: Base layer; imaging layer; and coating layer; The imaging layer is arranged on the base layer, and includes a concave cylindrical structure composed of one or more concave cylindrical mirrors and / or negative Fresnel structures; the coating layer is stacked on the imaging layer.

2. The imaging film according to claim 1, characterized in that: When the concave cylindrical structure comprises a concave cylindrical mirror, the width of the cross section of the concave cylindrical mirror is 1 mm-5 mm, and the depth is 10 μm-200 μm.

3. The imaging film according to claim 2, characterized in that: The suspension height of the suspended image is equal to the focal length of the concave cylindrical mirror, and the focal length of the concave cylindrical mirror is 1mm-5mm.

4. The imaging film according to claim 2, characterized in that: The curvatures corresponding to various points on the concave surface of the concave cylindrical mirror are the same or different.

5. The imaging film according to claim 2, characterized in that: The levitation height of the levitation image is related to the width and depth of the cross section of the concave lens.

6. The imaging film according to claim 1, characterized in that: When the concave cylindrical surface structure comprises a negative Fresnel structure, the groove cross section is a continuously arranged right-angled inclined surface, the structure period is 2 μm-100 μm, and the depth is 1 μm-10 μm.

7. The imaging film according to claim 1, characterized in that: The imaging layer includes a concave cylindrical surface structure composed of a negative Fresnel structure and a convex cylindrical surface structure composed of a Fresnel structure which are arranged at intervals.

8. The imaging film according to claim 1, characterized in that: The imaging layer comprises a concave cylindrical surface structure composed of a negative Fresnel structure and a convex cylindrical surface structure composed of a Fresnel structure which are arranged at intervals, and a prism structure arranged on the negative Fresnel structure.

9. The imaging film according to claim 10, characterized in that: The arrangement period of the prism structure is 100 μm-200 μm.

10. An image display element comprising the imaging film according to any one of claims 1 to 10.

11. A method for preparing an imaging film as claimed in any one of claims 1 to 10, characterized in that: The method comprises: Provides a base layer; Disposing an imaging layer on the base layer; The image is subjected to a coating operation to stack a coating layer on the image layer.

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