CN210401718U - Optical imaging film - Google Patents

Abstract

The embodiment of the present application provides an optical imaging film, including: a focusing layer having a plurality of focusing structures; the image-text layer is provided with a plurality of sub-image-texts, and at least part of the sub-image-texts are different in pattern; the focusing layer is matched with the image-text layer, and the focusing structures and the sub-image-texts are arranged in a one-to-one correspondence mode, so that the optical imaging film presents a floating and/or sinking image. In this application, this optical imaging membrane's picture and text layer includes a plurality of sub-pictures and texts, and each sub-picture and the focus structure interact that corresponds, forms the image that has the enlarged effect, consequently, compares with prior art, the sub-picture and text image width in this application is great to can increase the size of image, optical imaging membrane in this application can improve the magnification of predetermineeing the picture and text promptly.

Description

Optical imaging film

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of optical films, in particular to an optical imaging film.

[ background of the invention ]

The imaging and display technology is receiving more and more attention, the imaging technology realized based on the micro lens has great potential and development prospect by virtue of the advantages of complete parallax, continuous viewpoint, no need of any observation glasses, no special illumination and the like, is gradually developed into the automatic display technology with the most potential and prospect, and the imaging technology generally adopts the Moire imaging technology to form the optical imaging film. The optical imaging film typically includes a graphics layer including a plurality of micrographics and a focusing layer typically including a plurality of microlenses that interact with the graphics layer to form an image having a magnifying effect. The micro-lens is an artificially designed functional structure with characteristic dimension of micron or nanometer scale and arranged according to a specific mode, has the characteristics of light weight, high design freedom, flexible structure and the like, and has remarkable advantages in the field of optical imaging.

However, in the above-mentioned imaging method, the size of the formed image is related to the size of the microlens and the microimage, and the size of the microimage or the microlens itself is limited, resulting in limitation of the size of the formed image, that is, a low magnification of the optical imaging film.

[ Utility model ] content

In view of this, embodiments of the present disclosure provide an optical imaging film, so as to solve the problem of low magnification of the optical imaging film in the prior art.

The embodiment of the application provides an optical imaging film, optical imaging film includes:

a focusing layer having a plurality of focusing structures;

the image-text layer is provided with a plurality of sub-image-texts, and at least part of the sub-image-texts are different in pattern;

the focusing layer is matched with the image-text layer, and the focusing structures and the sub-image-texts are arranged in a one-to-one correspondence mode, so that the optical imaging film presents a floating and/or sinking image.

In one possible design, the sub-images are set as partial images of a preset image, and each sub-image corresponds to a different region of the preset image.

In one possible design, the graphic portions presented adjacent to the sub-graphics are the same.

In one possible design, one or more sub-images are present in each sub-image.

In one possible design, in the image-text layer, each sub-image-text is set as a partial image of a preset image-text;

and partial patterns of at least two preset images and texts are different.

In a possible design, the preset graphics context is divided into N equal parts, and in each sub-graphics context, part of the pattern of each preset graphics context is the same as that of the preset graphics context

In a possible design, the predetermined pattern is divided into N equal parts, and at least a part of the predetermined pattern in each sub-image is larger than the predetermined pattern

In one possible design, the sub-image includes one or more of a printed pattern, a relief pattern, and a fill pattern.

In one possible design, the focusing structures correspond to the sub-images one to one;

the distance between the sub-image-text and the focal plane of the focusing structure is 0.7-1.3 times of the focal length.

In one possible design, the focusing structures are arranged periodically or randomly.

In one possible design, the optical imaging film comprises a polymer layer, the sub-pattern is formed on one side of the polymer layer along the thickness direction, and the focusing structure is formed on the other side of the polymer layer; or;

the optical imaging film comprises a first polymer layer and a second polymer layer, one ends, close to each other, of the first polymer layer and the second polymer layer are fused with each other, the sub-patterns are formed on the first polymer layer, and the focusing structures are formed on the second polymer layer.

In one possible design, the optical imaging film further includes a substrate layer, and the image-text layer is formed on one side of the substrate layer and the focusing layer is formed on the other side of the substrate layer along the thickness direction.

In this application, this optical imaging membrane's picture and text layer includes a plurality of sub-pictures and texts, and each sub-picture and the focus structure interact that corresponds, forms the image that has the enlarged effect, consequently, compares with prior art, the sub-picture and text image width in this application is great to can increase the size of image, optical imaging membrane in this application can improve the magnification of predetermineeing the picture and text promptly.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of an optical imaging film provided herein in a first embodiment;

FIG. 2 is a schematic cross-sectional view of an optical imaging film provided herein in a second embodiment;

FIG. 3 is a schematic cross-sectional view of an optical imaging film provided herein in a third embodiment;

FIG. 4 is a schematic cross-sectional view of an optical imaging film provided herein in a fourth embodiment;

FIG. 5 is a schematic cross-sectional view of an optical imaging film provided herein in a fifth embodiment;

FIG. 6 is a schematic cross-sectional view of an optical imaging film provided herein in a sixth embodiment;

FIG. 7 is a schematic view of a distribution of the focusing structure of the focusing layer of the optical imaging film provided herein;

FIG. 8 is a schematic diagram of the distribution of preset graphics and texts;

FIG. 9 is a schematic illustration of a distribution of sub-images of an image-text layer of an optical imaging film provided herein;

FIG. 10 is a schematic view of another distribution of the focusing structure of the focusing layer of the optical imaging film provided herein;

FIG. 11 is a schematic view of another distribution of sub-images of an image-text layer of an optical imaging film provided herein.

Reference numerals:

1-an image-text layer;

11-picture and text structure;

111-presetting pictures and texts;

111 a-sub-picture and text;

12-a first polymer layer;

2-a focusing layer;

21-a focusing structure;

22-a second polymer layer;

3-a substrate layer;

4-a reflective layer;

5-a first protective layer;

6-a second protective layer;

7-a polymer layer;

81-a coloured layer;

82-a spacer layer;

83-a tie layer;

84-base layer.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

Embodiments of the present application provide an optical imaging film that can be used as an anti-counterfeiting film, a decorative film, and the like. As shown in fig. 1, the optical imaging film comprises a pattern layer 1 and a focusing layer 2, wherein the pattern layer 1 is used for forming a preset pattern 111 for magnification, for example, in the embodiment shown in fig. 8, the preset pattern 111 is "field", and under the action of the focusing layer 2, the optical imaging film can present an image of "field", and the image is an image with a magnification effect. In particular, the focusing layer 2 has a plurality of focusing structures 21; the image-text layer 1 is provided with a plurality of sub-images 111a, and at least part of the sub-images 111a have different patterns; the focusing layer 2 is matched with the image-text layer 1, and the focusing structure 21 is arranged corresponding to the sub-image-text 111a, so that the optical imaging film presents a floating and/or sinking image.

As shown in fig. 9 and fig. 11, the teletext layer 1 includes a plurality of sub-teletext 111a, and at least a part of the sub-teletext 111a in the plurality of sub-teletext 111a is a part of the predetermined pattern of the teletext 111, that is: the sub-images 111a are all part of the pattern of the preset image 111, or one part of the sub-image 111a is part of the pattern of the preset image 111, and the other part of the sub-image 111a is the whole preset image 111.

When each sub-image 111a is a partial pattern of the preset image 111, each sub-image 111a can be combined to form the preset image 111, that is, each sub-image 111a is equivalent to a structure formed by respectively cutting the preset image 111, and each sub-image 111a needs to satisfy a condition of forming a complete preset image 111. As shown in fig. 9 and 11, in the graphics layer 1, the sub-graphics 111a are spaced apart from each other.

In the optical imaging film, each sub-image 111a corresponds to each focusing structure 21 of the focusing layer 2 one by one, that is, each focusing structure 21 interacts with the corresponding sub-image 111a, and an image with an amplification effect is formed according to a moire imaging principle, and the image is a virtual image. Therefore, the distribution rule of each sub-text 111a is the same as the distribution rule of the focus structure 21.

It should be noted that the principle of moire imaging adopted in the present application is different from the principle of directly magnifying the micro-image through a lens (convex lens imaging) in the prior art, and the principle of moire imaging refers to the prior art.

The design idea analysis of the application is as follows: in the existing moire imaging technology, the image-text layer 1 is usually provided with a plurality of complete target patterns, and each target pattern is located in a period unit or in a range corresponding to the aperture of the focusing structure 21, so that an image with an amplification effect is formed under the action of the plurality of focusing structures 21 of the focusing layer 2. For example, assuming that the imaging magnification of the focusing structure 21 is 200, the target image can be magnified 200 times through the interaction between the focusing layer 2 and the image-text layer 1, i.e. an image with a magnification effect of 200 times is formed. In the present application, the image-text layer 1 includes a plurality of sub-images 111a, and each sub-image 111a and the corresponding focusing structure 21 can form an image with an amplification effect. For example, assuming that the imaging magnification of the focusing structure 21 is 200, the image-text layer 1 is set as a plurality of sub-images 111a under the condition that the focusing structure 21 is not changed, and the preset image-text 111 corresponding to the sub-image 111a is 3-5 times of the existing target image, and after moire imaging, an image with the magnification of 200 × (3-5) times can be formed. Therefore, an image with a larger magnification can be obtained without changing the height or depth of the image.

In a possible design, the predetermined pattern 111N is equally divided, and in each of the sub-patterns 111, a part of the predetermined pattern is the predetermined pattern 111

Therefore, in the embodiment, after the sub-images 111 are combined, there is no overlapping area between the partial images of the preset images, and at this time, the optical imaging film can present the image of the preset image 111, and has a good imaging effect.

In another possible design, the predetermined pattern 111N is equally divided, and in each of the sub-patterns 111, at least a part of the predetermined pattern is larger than that of the predetermined pattern 111

Therefore, in this embodiment, after the sub-images 111 are connected, at least part of the patterns of the preset image 111 are overlapped, and at this time, the optical imaging film can still display the image of the preset image 111.

That is, assuming that n sub-texts 111a are provided in total, each sub-text 111a in the n sub-texts 111a may not only be provided with a part that is equally divided, but also be diffused to the periphery with the equally divided center to form a partial pattern; because each sub-image 111a includes the divided part, at least one preset image 111 can be combined regardless of the overlapping amount.

In addition, the distribution of the preset image-text 111 corresponding to the partial pattern of each sub-image-text 111a is larger than the aperture range of the period unit or the corresponding focusing structure 21 in which the sub-image-text 111a is located, but each sub-image-text 111a actually presents the portion in the period unit corresponding to the preset image-text 111 or the aperture range of the corresponding focusing structure 21, so that the partial pattern of the sub-image-text 111a can be set to be as large as the aperture range of the period unit area or the corresponding focusing structure 21 at maximum, and can be set to be as small as the equally-divided portion at minimum, and of course, any intermediate value can be taken from the maximum to the minimum. The equally divided part is located at the center of the sub-image 111a and is opposite to the center of the focusing structure 21, so that the sub-image 111a opposite to the center of each focusing structure 21 is divided into different equal parts, and the shape of the partial pattern formed by diffusing the equal parts into the center can be circular, triangular, square, rectangular, trapezoidal, regular hexagonal, special-shaped, and the like.

Meanwhile, each sub-image 111a has a central point, and each central point corresponds to a point at a different position of the preset image 111.

In addition, each sub-image 111a corresponds to a different area of the preset image 111, that is, the sub-image 111a presents a pattern of the different area of the preset image 111.

In one possible design, the graphics presented by each sub-image 111a are different. The graphics presented by each sub-image 111a are different, including: the content of the graphics presented by each sub-image 111a is different, and/or the position of each sub-image 111a in the preset image 111 is different.

In another possible design, the graphics parts presented by each sub-image 111a are the same, that is, in each sub-image 111a, at least two sub-images 111a present the same graphics, and the graphics parts presented by adjacent sub-images 111a are the same.

Meanwhile, one or more sub-images 111a in the plurality of sub-images 111a are blank, for example, if the preset image is an open circle, the sub-image 111a is blank when the sub-image 111a is the middle part of the open circle.

In the above embodiments, the focusing structures 21 are microlenses or fresnel lenses, and the sub-patterns 111a are disposed opposite to the corresponding focusing structures 21.

In one possible design, as shown in fig. 9, the distances d1 between adjacent sub-patterns 111a are the same, i.e. the sub-patterns 111a are distributed periodically, while, as shown in fig. 7, in the focusing layer 2 of the optical imaging film, the distances between adjacent focusing structures 21 are the same, i.e. the focusing structures 21 are distributed periodically.

In this embodiment, the periodically distributed focusing structures 21 and the sub-images 111a can form a single image with a magnifying effect. In addition, the period of the focusing structures 21 (the distance d1 between adjacent focusing structures 21) is the same as the period of the sub-image 111 a.

In another possible design, as shown in fig. 11, the distances d2 between adjacent sub-images 111a are different, that is, the sub-images 111a are randomly distributed, and accordingly, as shown in fig. 10, in the optical imaging film, the distances between adjacent focusing structures 21 of the focusing layer 2 are different, that is, the focusing structures 21 are randomly distributed, and in the random arrangement, it is still satisfied that the sub-images 111a and the focusing structures 21 are arranged in a one-to-one correspondence.

In this embodiment, randomly distributed sub-images 111a and focusing structures 21 can form a unique image. Such as a unique floating image, and by setting the sub-image 111a, the marginal circle around the floating image can be eliminated, thereby improving the image definition and quality. It should be noted that, in the optical imaging film, the distribution rule of the sub-image 111a may be determined by the distribution rule of the focusing structure 21.

On the other hand, the shapes and sizes of the sub-images 111a may be the same or different, and the sizes and shapes of the sub-images 111a are specifically set according to the preset image 111.

In the focusing layer 2, the focusing structures 21 are formed into protrusions or depressions having a hemispherical shape or a smaller than hemispherical shape by imprinting and curing in the polymer layer, and the diameters D of the focusing structures 21 are the same. Of course, the focusing structure 21 may be formed in other ways, such as etching, etc.

Preferably, the focusing structures 21 have the same shape and size, and are all hemispherical protrusions, and the diameter thereof may be 20 μm to 1000 μm.

In the above embodiments, each sub-image 111a in the image-text layer 1 may include one or more of a printing pattern, a relief pattern, and a filling pattern.

When the image-text layer 1 is formed, the sub-image-text 111a can be printed on the polymer layer, or the corresponding sub-image-text 111a can be pressed in the polymer layer through a mold.

Meanwhile, the sub-image 111a may further include a filling pigment, so that the enlarged preset image formed has a specific color.

In the above embodiments, the focusing structures 21 correspond to the sub-images 111a one-to-one, and the sub-images 111a are located at or near the focal plane of the corresponding focusing structure 21, at this time, the imaging effect of the focusing structure 21 on the sub-images 111a is better. Wherein, for the lens (focusing structure 21), the focal plane is defined as: the plane through the focal point and perpendicular to the main optical axis of the system is the focal plane.

It should be noted that the sub-image 111a is not strictly located in the focal plane of the corresponding focusing structure 21, and the sub-image 111a may be located near the focal plane of the corresponding focusing structure 21. Specifically, the distance between the sub-image 111a and the focal plane of the corresponding focusing structure 21 is 0.7 to 1.3 times the focal length.

The total thickness of the optical imaging film is between one half of the curvature radius of the focusing structure 21 and three times of the curvature radius of the focusing structure 21, and in order to make the focusing structure 21 more suitable, the effective diameter of the focusing structure 21 is (20 μm, 1000 μm), or (20 μm, 500 μm), or (55 μm, 200 μm), or has a small diameter of (300 μm, 450 μm); for better imaging, the focal length of the focusing structure 21 is (10 μm, 2000 μm), or (20 μm, 100 μm), or (200 μm, 450 μm), or (550 μm, 900 μm), or (1050 μm, 1500 μm); in order to make the application field of the optical imaging film wider, the total thickness of the optical imaging film is less than 5000 μm, for example, the thickness of the optical imaging film is (20 μm, 200 μm) for high-end fields and fields requiring ultra-thin design, or the thickness of the optical imaging film is (300 μm, 500 μm) for general small-volume products and fields requiring no high thickness, or the thickness of the optical imaging film is (600 μm, 1000 μm), or even thicker, such as 1200 μm, 1300 μm, 1500 μm, 2000 μm, 2500 μm, 3500 μm, or 4500 μm.

In one possible design, as shown in fig. 1, the image-text layer 1 and the focusing layer 2 are formed on the same polymer layer 7, and during molding, the focusing layer 2 is formed by pressing a plurality of focusing structures 21 on one side of the same polymer layer 7, and at the same time, the image-text layer 1 is formed by stamping and filling a material on the other side of the polymer layer 7 to form a plurality of sub-images 111a, so that the optical imaging film is of a film structure, the image-text layer 1 and the focusing layer 2 are of an integral structure, and no substrate layer or the like exists between the image-text layer 1 and the focusing layer, so that the thickness of the optical imaging film can be reduced, and the integral optical imaging film has poor mechanical properties, so that the optical imaging film is easily cut off during hot stamping.

Alternatively, as shown in fig. 2, the optical imaging film includes a first polymer layer 12 and a second polymer layer 22, and the sides of the first polymer layer 12 and the second polymer layer 22 that are attached to each other are fused to each other, the sub-image 111a is formed on the first polymer layer 12, and the focusing structure 21 is formed on the second polymer layer 22.

In another possible design, as shown in fig. 3, in addition to the image-text layer 1 and the focusing layer 2, the optical imaging film further includes a substrate layer 3, and the image-text layer 1 and the focusing layer 2 are respectively located on two sides of the substrate layer 3 along the thickness direction H, and the substrate layer is a PET layer, a PC layer, a PI layer, a PMMA layer or a CPI layer.

Specifically, in the embodiment shown in fig. 3, in the optical imaging film, the image-text layer 1 includes a first polymer layer 12, a sub-image 111a is disposed on the first polymer layer 12, meanwhile, the focusing layer 2 includes a second polymer layer 22, the focusing structure 21 is formed on the second polymer layer 22, and meanwhile, the first polymer layer 12 and the second polymer layer 22 are disposed on two sides of the substrate layer 3, respectively, so as to form a complete optical imaging film.

In another possible design, as shown in fig. 4, the optical imaging film further includes a reflective layer 4, the reflective layer 4 is disposed outside the focusing layer 2, and the reflective layer 4 is used for reflecting the light entering the optical imaging film, so as to promote the light to exit from the focusing layer 2 and improve the imaging effect.

In this embodiment, the image-text layer 1 and the focusing layer 2 of the optical imaging film may be an integral structure, and of course, a substrate layer 3 may also be disposed between the image-text layer 1 and the focusing layer 2.

In another possible design, as shown in fig. 5, the optical imaging film may further include a protective layer disposed outside the image-text layer 1 and/or disposed outside the focusing layer 2. In particular, the protective layer may comprise a first protective layer 5 and/or a second protective layer 6.

Wherein, first protective layer 5 sets up in the outside of picture and text layer 1, and/or, second protective layer 6 sets up in the outside of focusing layer 2, and this first protective layer 5 is used for providing the protection to picture and text layer 1 to prevent sub-picture and text 111a deformation, this second protective layer 6 can provide the protection to focusing layer 2, thereby prevent that focus structure 21 from damaging, improve this optical imaging membrane's life-span.

In one possible design, the first protective layer 5 can be a transparent ink layer, and the second protective layer 6 can also be used as a coloring layer.

Similarly, the image-text layer 1 and the focusing layer 2 of the optical imaging film in this embodiment may be an integral structure, and of course, a substrate layer 3 may also be disposed between the image-text layer 1 and the focusing layer 2.

In another possible design, as shown in fig. 6, the optical imaging film further includes a reflective layer 4, a spacer layer 82, an adhesive layer 83 and a base layer 84 in addition to the image-text layer 1 and the focusing layer 2, the reflective layer 4 is disposed on the outer side of the focusing layer 2, and a colored layer 81 is disposed on the outer side of the reflective layer 4, the colored layer 81 may be made of a material with color, and the spacer layer 82 is disposed between the image-text layer 1 and the focusing layer 2 and is made of a transparent material, such as PET, PC, PI, PMMA or CPI. The image-text layer 1, the focusing layer 2, the reflecting layer 4 and the spacing layer 82 form a main body of the optical imaging film, the bottom of the optical imaging film is provided with a bonding layer 83, the bonding layer 83 can be specifically OCA glue, the main body structure of the optical imaging film can be bonded to the base layer 84 through the bonding layer 83, so that a consumer electronic cover plate is formed, the base layer 84 is a cover plate body, and the base layer 84 can be made of glass, plastic, organic glass, sapphire and the like.

Alternatively, the optical imaging film can be used in other fields, for example, the optical imaging film can be used for shells of household appliances, various outer packages and various anti-counterfeiting occasions, or can be used for realizing anti-counterfeiting function and decoration.

In one possible design, the focusing structures 21 are periodically arranged to form the focusing layer 2 as shown in fig. 7, and correspondingly, the sub-images 111a of the image-text layer 1 are also periodically arranged, so that the optical imaging film can form a magnified image, which may be floating and/or sinking.

In another possible design, the focusing structures 21 are randomly arranged to form the imaging layer 2 as shown in fig. 10, and correspondingly, the sub-images 111a in the image layer 1 are also randomly arranged, so that the optical imaging film can form a unique image, which is floating and/or sinking.

Specifically, the optical imaging film includes a polymer layer 7, the focusing layer 2 is formed by pressing the focusing structure 21 out of one side of the polymer layer 7 in the thickness direction H; alternatively, a plurality of focusing structures 21 are etched on one side of the polymer layer 7 in the thickness direction H to form the above-described focusing layer 2.

At the same time, the above-described image-text layer 1 is formed by printing out each sub-image-text 111a on the other side of the polymer layer 7 in the thickness direction H.

In one possible design, a reflective layer 4 is provided on the side opposite the focusing layer 2, i.e. the reflective layer 4 is provided on the outside of the image layer 1.

In another possible design, a first protective layer 5 is provided on the outside of the focusing layer 2 and/or a second protective layer 6 is provided on the outside of the image-text layer 1. The first protective layer 5 and/or the second protective layer 6 can serve to protect the image-text layer 1 and/or the focusing layer 2. The first protective layer 5 can be a transparent ink layer, and the second protective layer 6 can be a colored layer.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (12)

1. An optical imaging film, comprising:

a focusing layer having a plurality of focusing structures;

the image-text layer is provided with a plurality of sub-image-texts, and at least part of the sub-image-texts are different in pattern;

the focusing layer is matched with the image-text layer, and the focusing structures and the sub-image-texts are arranged in a one-to-one correspondence mode, so that the optical imaging film presents a floating and/or sinking image.

2. The optical imaging film as claimed in claim 1, wherein the sub-images are arranged as partial patterns of a preset image, and each sub-image corresponds to a different area of the preset image.

3. The optical imaging film of claim 2, wherein the graphic portions presented adjacent to the sub-graphics are the same.

4. The optical imaging film as claimed in claim 2, wherein one or more sub-images present a blank.

5. The optical imaging film as claimed in claim 1, wherein in the image-text layer, each sub-image-text is arranged as a partial pattern of a preset image-text;

and partial patterns of at least two preset images and texts are different.

6. The optical imaging film as claimed in claim 5, wherein the predetermined patterns are divided into N equal parts, and the partial patterns of the predetermined patterns are the same for the predetermined patterns

7. The optical imaging film as claimed in claim 5, wherein the predetermined pattern is divided into N equal parts, and at least a part of the partial pattern of the predetermined pattern is larger than that of the predetermined pattern in each of the sub-patterns

8. The optical imaging film of claim 1, wherein the sub-graphics comprises one or more of a printed pattern, a relief pattern, and a fill pattern.

9. The optical imaging film of claim 1, wherein the focusing structures correspond one-to-one to the sub-images;

the distance between the sub-image-text and the focal plane of the focusing structure is 0.7-1.3 times of the focal length.

10. The optical imaging film of claim 1, wherein the focusing structures are arranged periodically or randomly.

11. The optical imaging film of claim 1, wherein the optical imaging film comprises a polymer layer, the sub-pattern is formed on one side of the polymer layer and the focusing structure is formed on the other side of the polymer layer along a thickness direction; or;

the optical imaging film comprises a first polymer layer and a second polymer layer, one ends, close to each other, of the first polymer layer and the second polymer layer are fused with each other, the sub-patterns are formed on the first polymer layer, and the focusing structures are formed on the second polymer layer.

12. The optical imaging film as claimed in claim 1, further comprising a substrate layer, wherein the image-text layer is formed on one side of the substrate layer and the focusing layer is formed on the other side of the substrate layer along the thickness direction.

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