Dynamic holographic anti-counterfeiting pattern generation method and system, computer and storage medium

Abstract

The invention provides a method for generating a dynamic holographic anti-counterfeiting pattern. The method comprises the following steps of: preparing a group of pictures with continuously changing postures; independently dividing each picture into a plurality of areas according to different brightness values; the sizes of the pictures filled with the linear gratings after processing and the pixels of the vertical grids are set to be uniform, a plurality of grids are arranged in the range of the size of each picture, if a plurality of pictures filled with the linear gratings after processing are arranged, the interior of each grid is uniformly divided into frames with the same number as the pictures, and the sizes of the frames are the same; next, each picture is sequentially placed in the grids, only the first frame of each grid is reserved in the first picture, only the next frame of each grid is reserved in the next picture, and only the last frame of each grid is reserved in the last picture; and establishing a cylindrical lens matrix model, sequentially carrying out primary light etching and secondary light etching on the cylindrical lens matrix model, and obtaining the dynamic holographic anti-counterfeiting pattern after light etching.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-counterfeiting images, and particularly to a method, system, computer, and storage medium for generating dynamic holographic anti-counterfeiting patterns. Background Art

[0002] There is a grating animation formed by moiré fringes. However, this technology often requires two layers, namely a graphic layer and a mask / lens layer, and it is often difficult to apply in the single-layer film structure in the field of holographic anti-counterfeiting. The prior art requires a double-layer structure, one layer is the graphic layer, and the other layer is the mask layer or the lens layer. If it is the mask layer, a certain movement is required between the two layers to observe the dynamic effect. If it is the lens layer, the two layers can be fixed together, but a certain distance is required so that the micro-graphic information array can be located near the focal point of the lens array to achieve the imaging effect. This is very difficult to achieve in terms of technology, requiring alignment and a certain film thickness, and the yield is low and it is difficult to achieve mass production.

[0003] In view of this, it is necessary to provide a new method, system, computer, and storage medium for generating dynamic holographic anti-counterfeiting patterns to overcome the above defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for generating dynamic holographic anti-counterfeiting patterns. The holographic anti-counterfeiting film pattern produced has a dynamic effect no less than that of the grating animation of the double-layer lens structure, and because its structure is single-layer, there is no difference in the process compared with the preparation of traditional holographic anti-counterfeiting films, and the process implementation is very easy to achieve industrialization.

[0005] To achieve the above purpose, the present invention provides a method for generating dynamic holographic anti-counterfeiting patterns, including the following steps:

[0006] S1. Prepare a set of pictures with continuously changing postures;

[0007] S2. Divide each picture in the set of pictures in step S1 into several regions according to different brightness values, and fill each region with straight gratings in different directions;

[0008] S3. Set the sizes of the set of pictures filled with straight gratings after the processing in step S2 and the vertical grid pixels to be unified. There are several grids within the size range of each picture. If there are multiple pictures in the set of pictures filled with straight gratings after the processing, then further divide each grid internally into the same number of frames as the number of pictures, and the size of each frame is the same;

[0009] Next, put each picture into the grid in turn. Only the first frame of each grid is retained for the first picture, only the next frame of each grid is retained for the next picture, and only the last frame of each grid is retained for the last picture;

[0010] S4. Establish a cylindrical lens matrix model and arrange it in an array in the vertical direction. After the arrangement, the size of the array is the same as that of the vertical grid in step S3.

[0011] S5. Perform first optical etching and then second optical etching on the cylindrical lens matrix model. After photolithography, a dynamic holographic anti-counterfeiting pattern is obtained.

[0012] Preferably, each area is filled with linear gratings in different directions.

[0013] Preferably, the width of the cylindrical lens is between 30 - 100 μm, the period of the linear grating is between 1 - 50 μm, and the depth of the photolithography structure is 2 - 3 μm.

[0014] Preferably, the size of the array after arrangement is the same as that of the vertical grid.

[0015] Preferably, the maximum exposure power for the first photolithography is 100%, and the maximum exposure power for the first and second optical etchings is 50%.

[0016] A dynamic holographic anti-counterfeiting pattern generation system includes: an acquisition module, a region division and filling module, and an etching unit;

[0017] The acquisition module, the region division and filling module, and the etching unit are communicatively connected. The acquisition module is used to acquire a set of pictures with continuously changing postures and transmit the acquired pictures with continuously changing postures to the region division and filling module.

[0018] The region division and filling module is used to separately divide each picture in the pictures into several regions according to different brightness values, and each region is filled with linear gratings in different directions to obtain a cylindrical lens matrix model.

[0019] The etching unit performs optical etching on the cylindrical lens matrix model to obtain a dynamic holographic anti-counterfeiting pattern.

[0020] A computer includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the dynamic holographic anti-counterfeiting pattern generation method is implemented.

[0021] A readable storage medium stores a computer program, and when the program is executed by a processor, the dynamic holographic anti-counterfeiting pattern generation method is implemented.

[0022] Compared with the prior art, the beneficial effect is that the pattern of the produced holographic anti-counterfeiting film has a dynamic effect no less than the grating animation effect of the double-layer lens structure, and since its structure is single-layer, there is no difference in the process from the preparation of traditional holographic anti-counterfeiting films, and the process is easy to implement, so it is very easy to realize industrialization.

[0023] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The features and advantages of the present invention may be realized and obtained by the elements and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more apparent from the following description and the appended claims, or may be learned by practice of the embodiments described herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Prepare the schematic diagram of the first picture for the embodiment of the present invention.

[0026] Figure 2 Prepare the schematic diagram of the second picture for the embodiment of the present invention.

[0027] Figure 3 Prepare the schematic diagram of the third picture for the embodiment of the present invention.

[0028] Figure 4 For Figure 1 The schematic diagram after filling.

[0029] Figure 5 For Figure 2 The schematic diagram after filling.

[0030] Figure 6 For Figure 3 The schematic diagram after filling.

[0031] Figure 7 Prepare the schematic diagram of the cylindrical lens matrix model established for the embodiment of the present invention.

[0032] Figure 8 For Figure 7 The schematic diagram of the cylindrical lens matrix model shown at an angle.

[0033] Figure 9 For Figure 7 The schematic diagram of the cylindrical lens matrix model shown at another angle.

[0034] Figure 10 For Figure 7 The schematic diagram of the cylindrical lens matrix model shown at yet another angle.

[0035] Figure 11This is a schematic diagram of the light splitting principle of the cylindrical lens matrix model after lithography in the embodiments of the present invention. Detailed implementation manners

[0036] In order to make the objectives, technical solutions and beneficial technical effects of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described in this specification are only for explaining the present invention and not for limiting the present invention.

[0037] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0038] It should also be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be determined according to specific circumstances.

[0039] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features. In addition, the meanings of "multiple" and "several" refer to two or more, unless otherwise clearly and specifically defined.

[0040] The present invention provides a method for generating a dynamic holographic anti-counterfeiting pattern, including the following steps:

[0041] S1. Prepare a set of pictures with continuously changing postures, Figures 1 - 3 The presented is the dynamic effect of the butterfly's wings gradually opening.

[0042] S2. Divide each picture in the set of pictures described in step S1 (i.e., Figures 1 - 3 ) into several regions separately according to different brightness values, and each region is filled with linear gratings in different directions, Figures 1 - 3 The filling effects are respectively as shown in Figures 4 - 6 shown.

[0043] S3. Unify the sizes of the pictures with linear grating filling and the vertical grid pixels described in step S2. There are several grids within the size range of each picture. If there are multiple pictures with linear grating filling after this set of processing, then evenly divide each grid into the same number of frames as the number of pictures. The size of each frame is the same.

[0044] Next, place each picture into the grid in sequence. For the first picture, only keep the first frame of each grid. For the next picture, only keep the next frame of each grid. For the last picture, only keep the last frame of each grid.

[0045] Among them, the specific process of step S3 is as follows: Set the size of the pictures with linear grating filling after this set of processing described in step S2 to 1000 * 1000 pixels, and set the vertical grid pixels to 100 * 1000 pixels. Then there are 10 grids within the size range of each picture. If there are 5 pictures with linear grating filling after this set of processing, then evenly divide each grid into 5 frames. The size of each frame is the same, and the size of each frame is 20 * 10000 pixels.

[0046] Next, place each picture into the grid in sequence. For the first picture, only keep the first frame of each grid. For the second picture, only keep the second frame of each grid. For the third picture, only keep the third frame of each grid. For the fourth picture, only keep the fourth frame of each grid. For the fifth picture, only keep the fifth frame of each grid. Thus, each grid is filled with pictures.

[0047] It should be noted that the above filling method is only for illustrative purposes. The actual pictures to be processed may have tens of thousands or hundreds of thousands of pixels. During photolithography, the period of the linear grating is between 1 - 5 μm. The width of the cylindrical lens described in step S3 is between 30 - 100 μm, and the depth of the photolithography structure is 2 - 3 μm.

[0048] S4. Establish a cylindrical lens matrix model and arrange it in an array in the vertical direction. The size of the arranged array is the same as the size of the vertical grid in step S3. The three - dimensional structure of the cylindrical lens matrix model is as Figure 7 shown.

[0049] S5. Perform a single photolithographic etching on the cylindrical lens matrix model. The maximum exposure power for a single photolithography is 100%. After a single photolithographic etching, perform a second photolithographic etching. The maximum exposure power for the second photolithography is 50%. In this way, the structure lithographed will roughly retain the morphology of the cylindrical lens, and at the same time, there will be linear grating lines containing picture information on the cylindrical lens. The three - dimensional structure diagram of the cylindrical lens matrix model after lithography is as Figure 8 (front view), Figure 9 (top view), Figure 10As shown in the (side view).

[0050] This cylindrical lens has grating pattern information on its surface. The direction of the grating lines will reflect the brightness of different regions of the pattern. Under the diffraction of light, this dense micro-nano structure grating will form pattern content distinguishable by the human eye. And the cylindrical lens has a light-splitting effect, and its undulation will control the presentation of the picture. As Figure 11 shown, when the human eye is above, the grating information at the position of the first picture (P1) will be observed. When the viewing angle moves, the grating information at the positions of the 2nd, 3rd, 4th, and 5th pictures will be observed in sequence. Therefore, when we observe, as the viewing angle moves, the picture information that can be seen changes accordingly, presenting a dynamic effect.

[0051] The holographic anti-counterfeiting film pattern produced by the embodiment of the present invention has a dynamic effect no less than that of the grating animation effect of the double-layer lens structure. And because its structure is single-layer, there is no difference in the process from the preparation of traditional holographic anti-counterfeiting films, so it is very easy to realize industrialization.

[0052] The present invention also provides a dynamic holographic anti-counterfeiting pattern generation system, including: an acquisition module, a region division and filling module, and an etching unit;

[0053] The acquisition module, the region division and filling module, and the etching unit are communicatively connected. The acquisition module is used to acquire a set of pictures with continuously changing postures, and transmit the acquired pictures with continuously changing postures to the region division and filling module,

[0054] The region division and filling module is used to separately divide each picture in the picture into several regions according to different brightness values, and fill each region with linear gratings in different directions to obtain a cylindrical lens matrix model,

[0055] The etching unit performs photo-etching on the cylindrical lens matrix model to obtain a dynamic holographic anti-counterfeiting pattern.

[0056] The present invention also provides a computer, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the dynamic holographic anti-counterfeiting pattern generation method is implemented.

[0057] The present invention also provides a readable storage medium, on which a computer program is stored. When the program is executed by a processor, the dynamic holographic anti-counterfeiting pattern generation method is implemented.

[0058] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-readable storage media (but not limited to phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other optical, magnetic storage media, etc.) containing computer-usable program code.

[0059] The computer-readable storage medium provided by the above embodiments of the present application and the method provided by the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run, or implemented by the application programs stored therein.

[0060] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0061] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0062] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0063] The present invention is not limited solely to what is described in the specification and embodiments. Therefore, additional advantages and modifications can be readily achieved by those skilled in the art. Thus, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A method for generating a dynamic holographic anti-counterfeiting pattern, characterized in that, It includes the following steps: S1. Prepare a set of pictures with continuously changing postures; S2. Divide each picture in the set of pictures in step S1 into several regions separately according to different brightness values; S3. Set the sizes of the pictures with straight-line grating filling after the processing in step S2 and the vertical grid pixels to be unified. There are several grids within the size range of each picture. If there are multiple pictures with straight-line grating filling after the processing, then evenly divide each grid into the same number of frames as the number of pictures. The size of each frame is the same; Next, place each picture into the grid in sequence. For the first picture, only retain the first frame of each grid. For the next picture, only retain the next frame of each grid. For the last picture, only retain the last frame of each grid; S5. Establish a cylindrical lens matrix model and arrange it in an array in the vertical direction; S6. Perform first light etching and second light etching on the cylindrical lens matrix model successively. After light etching, a dynamic holographic anti-counterfeiting pattern is obtained.

2. The dynamic holographic anti-counterfeiting pattern generation method according to claim 1, wherein Each region is filled with straight-line gratings in different directions.

3. The dynamic holographic anti-counterfeiting pattern generation method according to claim 1, wherein, The width of the cylindrical lens is between 30 - 100 um, the period of the straight-line grating is between 1 - 50 um, and the depth of the lithography structure is 2 - 3 um.

4. The dynamic holographic anti-counterfeiting pattern generation method according to claim 1, wherein The size of the arranged array is the same as the size of the vertical grid.

5. The method for generating a dynamic holographic anti-counterfeiting pattern according to claim 1, wherein The maximum exposure power for the first light etching is 100%, and the maximum exposure power for the second light etching is 50%.

6. A dynamic holographic anti-counterfeiting pattern generation system, characterized in that, It includes: An acquisition module, a region division and filling module, and an etching unit; The acquisition module, the region division and filling module, and the etching unit are communicatively connected. The acquisition module is used to acquire a set of pictures with continuously changing postures and transmit the acquired pictures with continuously changing postures to the region division and filling module; The region division and filling module is used to divide each picture in the picture into several regions separately according to different brightness values, and fill each region with straight-line gratings in different directions to obtain a cylindrical lens matrix model; The etching unit performs light etching on the cylindrical lens matrix model to obtain a dynamic holographic anti-counterfeiting pattern.

7. A computer, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the dynamic holographic anti-counterfeiting pattern generation method according to any one of claims 1 - 5.

8. A readable storage medium, on which a computer program is stored, characterized in that, When the program is executed by the processor, it implements the dynamic holographic anti-counterfeiting pattern generation method according to any one of claims 1 - 5.

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