Micro image-text manufacturing method and dynamic amplification film

Abstract

The invention relates to the technical field of anti-counterfeiting, and particularly discloses a micro image-text manufacturing method and a dynamic amplification film. The method comprises the steps that parameters of a micro lens array are obtained, and the parameters comprise the arrangement period of micro lenses, the curvature radius of the micro lenses and the focal length of the micro lenses; according to the parameters of the micro lens array, forming an array type micro image-text with a unified arrangement period, and obtaining a basic depth of field; according to the basic depth of field and the preset floating or sinking effect, data deformation is conducted on the array type micro image-text, so that the arrangement period of the array type micro image-text changes according to the preset rule, and the preset rule meets the three-dimensional spherical surface change rule. Therefore, when the array type micro image-text is matched with the micro lens array for use, human eyes can observe a three-dimensional image, namely, the arrangement period of the array type micro image-text is adjusted by utilizing a micro lens magnification imaging principle to obtain the micro image-text with a non-uniform arrangement period, so that the visual effect of the three-dimensional image can be met, and the manufacturing of the array type micro image-text is simplified.

Description

Technical Field

[0001] The present application relates to the field of anti-counterfeiting technology, and in particular to a method for producing micro-images and texts and a dynamic amplification film. Background Art

[0002] There are two main effects of lens array magnification at present: one is array-type micro-image magnification, which has depth of field and motion effects; the other is single-image magnification, which has depth of field dynamic or three-dimensional effects. Among them, array-type micro-images are made by making unit graphic arrays, and single-image images are calculated based on the principle of integrated imaging.

[0003] Generally, in order to form a single-image stereogram, it is often necessary to model in 3D software to form a stereo model. In order to present a stereo image formed by an array pattern, 3D modeling is also required, and the array pattern is deformed and simulated to conform to the visual effect of the stereo model, but the mapping process is relatively complicated. Summary of the invention

[0004] Based on this, it is necessary to provide a method for producing micro-images and texts and a dynamic amplification film to address the above problems.

[0005] According to a first aspect of an embodiment of the present application, a method for producing a micro-image and text is provided, and the method for producing a micro-image and text comprises:

[0006] Obtaining parameters of the microlens array, the parameters including the arrangement period of the microlenses, the curvature radius of the microlenses, and the focal length of the microlenses;

[0007] According to the parameters of the microlens array, an array type micro-image with a uniform arrangement period is formed to obtain a basic depth of field;

[0008] According to the basic depth of field and the preset floating or sinking effect, the array type micro-image is deformed so that the arrangement period of the array type micro-image changes according to a preset rule, and the preset rule satisfies the three-dimensional spherical surface change rule.

[0009] In one embodiment, the step of forming an array type micro-image with a uniform arrangement period according to the parameters of the micro-lens array to obtain a basic depth of field comprises:

[0010] According to the value of the preset macro-graphic magnification M and the value of the rotation angle α between the micro-lens array and the micro-graphic array, the r value is calculated by the following formula, where r is the ratio of the arrangement period of the micro-graphic to the arrangement period of the micro-lenses;

[0011]

[0012] According to the r value and the preset radius of curvature A of the microlens, the basic depth of field B is calculated by the following formula:

[0013]

[0014] In one embodiment, α is 0° to 5°.

[0015] In one embodiment, when the floating effect is preset, the preset rule satisfies the following three-dimensional spherical surface change rule:

[0016] D i 2 =0 2 - i 2

[0017]

[0018] Wherein, 0 is the spherical depth of field at the position of the horizontal coordinate value 0, which is the basic depth of field B; R i is the radius of the horizontal coordinate value i; D i is the spherical depth of field at the horizontal coordinate value i; f is the focal length of the microlens, r i is the proportion of micro-image and text data at the position of horizontal coordinate value i;

[0019] T i = i ×T1

[0020] Among them, T1 is the arrangement period of microlenses, T i is the arrangement period of micro-images and texts at the horizontal coordinate value i.

[0021] In one embodiment, when the sinking effect is preset, the preset rule satisfies the following three-dimensional spherical surface change rule:

[0022] D i 2 =0 2 - i 2

[0023]

[0024] Wherein, D0 is the spherical depth of field at the position where the horizontal coordinate value is 0, that is, the basic depth of field B; R i is the radius of the horizontal coordinate value i; D i is the spherical depth of field at the horizontal coordinate value i; f is the focal length of the microlens, r i is the proportion of micro-image and text data at the position of horizontal coordinate value i;

[0025] T i = i ×T1

[0026] Among them, i1 is the arrangement period of microlenses, T i is the arrangement period of micro-images and texts at the horizontal coordinate value i.

[0027] In one embodiment, the array type micro-images are continuous array type images or non-continuous array type images.

[0028] According to a second aspect of the embodiment of the present application, a dynamic amplifying film is provided, the dynamic amplifying film comprising a substrate, an array of micro-images formed on one side of the substrate, and a micro-lens array formed on the other side of the substrate;

[0029] The microlens array comprises a plurality of microlenses;

[0030] Each microlens corresponds to each micro-image one by one; the arrangement period of the microlenses is different from the arrangement period of the micro-image;

[0031] The micro-images and texts are obtained by using the micro-images and texts production method as described above.

[0032] In one embodiment, the array-type micro-image has a concave-convex structure along a cross section perpendicular to the surface of the substrate.

[0033] In one embodiment, a reflective layer is disposed on a side of the microlens array away from the array-type micro-image.

[0034] In one embodiment, the distance between the array-type micro-image and the micro-lens array is within the focal length range of the micro-lens.

[0035] The method for making micro-images and the dynamic magnifying film provided in this embodiment can first obtain the parameters of the microlens array when making micro-images, and form an array-type micro-image with a uniform arrangement period according to the parameters to obtain the basic depth of field, and then perform data deformation on the array-type micro-image according to the basic depth of field and the preset floating or sinking effect to change the uniform arrangement period of the array-type micro-image, so that the arrangement period of the array-type micro-image changes according to the preset law, and the preset law satisfies the law of three-dimensional spherical surface change. Therefore, when the array-type micro-image is used in conjunction with the microlens array, the human eye can observe a three-dimensional image, that is, the arrangement period of the array-type micro-image is adjusted by using the principle of microlens magnification imaging to obtain a micro-image with a non-uniform arrangement period, which can meet the visual effect of the three-dimensional image and simplify the production of the array-type micro-image. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flowchart of a method for producing micro-graphics provided in an embodiment of the present application;

[0037] Figure 2A schematic diagram of the structure of a dynamic amplification film provided in one embodiment of the present application;

[0038] Description of reference numerals:

[0039] 10. substrate; 20. array-type micro-images; 30. micro-lens array. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to understand the disclosure of the present invention more thoroughly and comprehensively.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "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.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] In one embodiment, a method for producing micro-images is provided. The method for producing micro-images provided in this embodiment can be used to produce array-type micro-images, which can be combined with a microlens array to enable the human eye to observe the display effect of a three-dimensional image. Specifically, an array-type micro-image can be formed on one side of a substrate, and a microlens array can be set on the other side of the substrate. The micro-images correspond to the microlenses one by one, and a three-dimensional image can be presented by using the magnification imaging principle of the microlens array, which can be applied to anti-counterfeiting technology on packaging.

[0045] Reference Figure 1 The method for making micro-text provided in this embodiment includes the following steps:

[0046] Step S100, obtaining parameters of the microlens array, the parameters including the arrangement period of the microlenses, the curvature radius of the microlenses, and the focal length of the microlenses;

[0047] Step S200: forming an array type micro-image with a uniform arrangement period according to the parameters of the micro-lens array, and obtaining a basic depth of field.

[0048] After obtaining the various parameters of the microlens array, an array-type micro-image with a uniform arrangement period can be formed through basic data calculation according to the parameters of each microlens array, and a basic depth of field can be obtained, that is, the arrangement period of each micro-image in the array-type micro-image is consistent, and at this time, the magnification effect of the micro-image through the microlens has a basic depth of field.

[0049] In practical applications, the arrangement period of each microlens in the microlens array can be determined first, and then the arrangement period of each microlens can be determined as the arrangement period of each micro-image, thereby forming an array-type micro-image with a uniform period. That is, when the micro-image file is initially produced, the arrangement period of the micro-image is consistent with the arrangement period of the microlens, and the arrangement period of each micro-image remains consistent.

[0050] In one embodiment, step S200 may specifically include:

[0051] According to the value of the preset macro-graphic magnification M and the value of the rotation angle α between the micro-lens array and the micro-graphic array, the r value is calculated by the following formula, where r is the ratio of the arrangement period of the micro-graphic to the arrangement period of the micro-lenses;

[0052]

[0053] Where, M is the magnification of the macroscopic figure; That is, it is the ratio of the arrangement period of micro-images to the arrangement period of micro-lenses, T1 is the arrangement period of the micro-lens array, T2 is the arrangement period of the micro-image array; α is the rotation angle between the micro-lens array and the micro-image array. Among them, α can be in the range of 0° to 5°.

[0054] Then, the basic depth of field B can be calculated according to the r value and the preset microlens curvature radius A by the following formula:

[0055]

[0056] That is to say, the angle between the microlens array and the micro-image array, and the ratio of the arrangement period of the micro-image array to the arrangement period of the microlens array will affect the magnification of the micro-image after passing through the microlens. Assuming that the angle between the microlens array and the micro-image array remains unchanged, changing the arrangement period of the micro-image at a certain position in the micro-image array can change the ratio of the arrangement period of the micro-image array at that position to the arrangement period of the microlens array, and thus can change the magnification of the micro-image at that position after passing through the microlens, that is, the image magnification effect at that position is different from the image magnification effect at other positions, and thus can bring about a three-dimensional display effect.

[0057] Step S300: deform the array type micro-images and texts according to the basic depth of field and the preset floating or sinking effect, so that the arrangement period of the array type micro-images and texts changes according to a preset rule, and the preset rule satisfies the three-dimensional spherical surface change rule.

[0058] Based on the above principles, the desired display effect can be preset, which can be a floating effect or a sinking effect. According to the basic depth of field and the preset floating or sinking display effect, the array-type micro-images with a uniform arrangement period can be deformed, so that the arrangement period of the array-type micro-images changes according to the preset rules, thereby obtaining array-type micro-images with inconsistent arrangement periods. Among them, the preset rules satisfy the law of change of the three-dimensional spherical surface. That is, the target three-dimensional image to be presented can be determined in advance, and then according to the image features (such as magnification effect) of each position of the three-dimensional spherical surface in the target three-dimensional image, the ratio of the arrangement period of the micro-images corresponding to each position to the arrangement period of the microlens can be reversely determined. Assuming that the arrangement period of the microlens is known, the arrangement period of the micro-image at that position can be determined. There is often a certain change law in the three-dimensional spherical surface, that is, the change law of the arrangement period of the array-type micro-images can be determined according to the change law of the three-dimensional spherical surface, so that it satisfies the change law of the three-dimensional spherical surface. Therefore, when the change law of the arrangement period of the array-type micro-images satisfies the change law of the three-dimensional spherical surface, the array-type micro-images can achieve different depths of field in different areas after passing through the microlens array, presenting the target three-dimensional image.

[0059] The method for making micro-images provided in this embodiment can first obtain various parameters of the microlens array when making micro-images, and form an array-type micro-image with a uniform arrangement period according to the various parameters and obtain a basic depth of field, and then perform data deformation on the array-type micro-image according to the basic depth of field and the preset floating or sinking effect to change the uniform arrangement period of the array-type micro-image, so that the arrangement period of the array-type micro-image changes according to a preset rule, and the preset rule satisfies the stereoscopic spherical surface change rule. Therefore, when the array-type micro-image is used in conjunction with the microlens array, the human eye can observe a stereoscopic image, that is, the arrangement period of the array-type micro-image is adjusted by using the principle of microlens magnification imaging to obtain a micro-image with a non-uniform arrangement period, which can meet the visual effect of the stereoscopic image and simplify the production of the array-type micro-image.

[0060] In one embodiment, the floating effect is preset. The preset rule satisfies the following three-dimensional spherical surface change rule:

[0061] D i 2 =0 2 - i 2

[0062]

[0063] Among them, D i is the spherical depth of field at the position of horizontal coordinate value i; D0 is the spherical depth of field at the position of horizontal coordinate value 0, which is the basic depth of field B; R i is the radius of the horizontal coordinate value i; r i is the ratio of micro-image data at the position of horizontal coordinate value i; f is the focal length of the microlens.

[0064] According to the above formula, the ratio r of the micro-graphic data at the position of the horizontal coordinate value i can be determined i .

[0065] Because, r i It can also be expressed as:

[0066] T i = i ×T1

[0067] Among them, T1 is the arrangement period of microlenses, T i is the arrangement period of micro-images and texts at the horizontal coordinate value i.

[0068] Therefore, the above formula can be used to calculate the arrangement period T of the micro-image at the horizontal coordinate value i: i .

[0069] That is, the image of the micro-image after being magnified by the micro-lens is a sphere, with the center of the sphere as the central coordinate, and the horizontal coordinate value of each point on the sphere on the cross section where the center of the sphere is located is recorded as i, i can be 0, 1, 2, ..., n, and n is the format radius. Where D0 is equivalent to the basic depth of field in step S200, that is, D0 =.

[0070] In a specific example, assuming that the rotation angle α=0°, the arrangement period of the microlens t1=120, the focal length of the microlens f=200, the radius of curvature A=100, and the preset magnification M=400, the formula The calculated value is r = 1.0025. The calculated proportional base depth of field B = 80, according to the formula The basic arrangement period of the micro-image is calculated to be T2 = 120.3. The depth of field at the highest point of the sphere is set as the basic depth of field B. At this time, B is 80mm. The overall size of the enlarged sphere is 80mm, and the radius R 40 =40.

[0071] As shown in Table 1, the ratio r1 to the ratio r 40 In the range of 1.0025 to 1.002887, it gradually increases with the increase of radius, and the change law meets the above-mentioned spherical change law; the depth of field value gradually decreases from 80mm corresponding to the position of radius 0 to 69.28203mm corresponding to the radius 400mm, and the depth of field change meets the spherical height change.

[0072] Focal length f <![CDATA[Format radius R i > <![CDATA[Depth of field D i > Basic Depth of Field B <![CDATA[Ratio r i > Basic ratio 200 0 80 80 1.0025 1.0025 200 1 79.99375 80 1.0025 1.0025 200 2 79.975 80 1.002501 1.0025 200 3 79.94373 80 1.002502 1.0025 200 4 79.89994 80 1.002503 1.0025 200 5 79.8436 80 1.002505 1.0025 200 6 79.77468 80 1.002507 1.0025 200 7 79.69316 80 1.00251 1.0025 200 8 79.59899 80 1.002513 1.0025 200 9 79.49214 80 1.002516 1.0025 200 10 79.37254 80 1.00252 1.0025 … … … … … … 200 38 70.39886 80 1.002841 1.0025 200 39 69.84984 80 1.002863 1.0025 200 40 69.28203 80 1.002887 1.0025

[0073] Table 1

[0074] In another embodiment, when the sinking effect is preset, the preset rule satisfies the following three-dimensional spherical surface change rule:

[0075] D i 2 =0 2 - i 2

[0076]

[0077] Among them, D i is the spherical depth of field at the position of the horizontal coordinate value i; D0 is the spherical depth of field at the position of the horizontal coordinate value 0, which is the basic depth of field B; R i is the radius of the horizontal coordinate value i; r i is the ratio of micro-image data at the position of horizontal coordinate value i; f is the focal length of the microlens.

[0078] The above formula can be used to determine the micro-graphic data ratio r at the location of the horizontal coordinate value i. i .

[0079] Because, r i It can also be expressed as:

[0080] T i = i ×T1

[0081] Among them, i1 is the arrangement period of microlenses, T i is the arrangement period of micro-images and texts at the horizontal coordinate value i.

[0082] Therefore, the above formula can be used to calculate the arrangement period T of the micro-image at the horizontal coordinate value i: i .

[0083] The difference between this embodiment and the above embodiment is that the display effect is sinking, while the display effect in the above embodiment is floating. For other contents, please refer to the description in the above embodiment, which will not be repeated here.

[0084] In one embodiment, the array type micro-images and texts may be continuous array type images and texts or non-continuous array type images and texts.

[0085] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0086] Based on the same inventive concept, in another embodiment, a dynamic amplification film is provided. Figure 2 The dynamic amplification film includes a substrate 10, an array type micro-image 20 formed on one side of the substrate, and a microlens array 30 formed on the other side of the substrate; the microlens array 30 includes a plurality of microlenses, and each microlens in the microlens array 30 corresponds to each micro-image in the array type micro-image 20 one by one; the arrangement period of the microlenses is different from the arrangement period of the micro-image.

[0087] The micro-images and texts are obtained by using the micro-images and texts production method provided in the above-mentioned embodiment.

[0088] In the dynamic magnifying film provided in this embodiment, the arrangement period of the array-type micro-images changes according to a preset rule, and the preset rule satisfies the change rule of the three-dimensional spherical surface. Therefore, when the array-type micro-images are used in conjunction with the microlens array, the human eye can observe a three-dimensional image, that is, by using the principle of microlens magnification imaging, the arrangement period of the array-type micro-images is adjusted to obtain micro-images with non-uniform arrangement periods, which can meet the visual effect of the three-dimensional image and simplify the production of the array-type micro-images.

[0089] For details about the method for making micro-images and texts, please refer to the detailed description in the aforementioned embodiments, which will not be repeated here.

[0090] In one embodiment, the array type micro-image 20 is a concave-convex structure along the cross section perpendicular to the surface of the substrate 10. The concave-convex structure may be filled with a coloring material, such as ink or other materials.

[0091] In one embodiment, a reflective layer may be provided on the side of the microlens array 30 away from the array-type micro-image 20. Thus, the observer can observe the three-dimensional reconstructed image on the side of the substrate 10, achieving a reflective 3D effect.

[0092] In one embodiment, the distance between the array type micro-image 20 and the micro-lens array 30 is within the focal length range of the micro-lens, thereby ensuring the imaging effect.

[0093] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for producing micro-pictures and texts, It is characterized in that The method for making the micro-picture and text comprises: Obtaining parameters of the microlens array, the parameters including the arrangement period of the microlenses, the curvature radius of the microlenses, and the focal length of the microlenses; According to the parameters of the microlens array, an array type micro-image with a uniform arrangement period is formed to obtain a basic depth of field; According to the basic depth of field and the preset floating or sinking effect, the array type micro-image is deformed so that the arrangement period of the array type micro-image changes according to a preset rule, and the preset rule satisfies the three-dimensional spherical surface change rule.

2. The method for making micro-images according to claim 1, It is characterized in that The step of forming an array type micro-image with a uniform arrangement period according to the parameters of the micro-lens array to obtain a basic depth of field comprises: According to the value of the preset macro-graphic magnification M and the value of the rotation angle α between the micro-lens array and the micro-graphic array, the r value is calculated by the following formula, where r is the ratio of the arrangement period of the micro-graphic to the arrangement period of the micro-lenses; According to the r value and the preset radius of curvature A of the microlens, the basic depth of field B is calculated by the following formula:

3. The method for making micro-pictures according to claim 2, It is characterized in that α is 0°~5°.

4. The method for making micro-pictures according to claim 2, It is characterized in that When the floating effect is preset, the preset rule satisfies the following three-dimensional spherical surface change rule: D i 2 ＝ 0 2 - i 2 in, 0 is the spherical depth of field at the position of the horizontal coordinate value 0, which is the basic depth of field B; R i is the radius of the horizontal coordinate value i; D i is the spherical depth of field at the horizontal coordinate value i; f is the focal length of the microlens, r i is the proportion of micro-image and text data at the position of horizontal coordinate value i; T i = i ×T 1 Among them, T 1 is the arrangement period of microlenses, T i is the arrangement period of micro-images and texts at the horizontal coordinate value i.

5. The method for making micro-pictures according to claim 2, It is characterized in that When the preset is a sinking effect, the preset rule satisfies the following three-dimensional spherical surface change rule: D i 2 ＝ 0 2 - i 2 Among them, D 0 is the spherical depth of field at the position of the horizontal coordinate value 0, which is the basic depth of field B; R i is the radius of the horizontal coordinate value i; D i is the spherical depth of field at the horizontal coordinate value i; f is the focal length of the microlens, r i is the proportion of micro-image and text data at the position of horizontal coordinate value i; T i = i ×T 1 Among them, T 1 is the arrangement period of microlenses, T i is the arrangement period of micro-images and texts at the horizontal coordinate value i.

6. The method for producing micro-images and texts according to claim 1, It is characterized in that The array type micro-images and texts are continuous array type images and texts or non-continuous array type images and texts.

7. A dynamic amplification film, It is characterized in that The dynamic amplification film includes a substrate, an array of micro-images formed on one side of the substrate, and a micro-lens array formed on the other side of the substrate; The microlens array comprises a plurality of microlenses; Each microlens corresponds to each micro-image one by one; the arrangement period of the microlenses is different from the arrangement period of the micro-image; Wherein, the micro-image and text are obtained by adopting any of the micro-image and text production methods as described in Claims 1 to 6.

8. The dynamic amplification film according to claim 7, It is characterized in that The array type micro-image has a concave-convex structure along a cross section perpendicular to the surface of the substrate.

9. The dynamic amplification film according to claim 7, It is characterized in that A reflective layer is arranged on a side of the microlens array away from the array-type micro-image.

10. The dynamic amplification film according to claim 7, It is characterized in that The distance between the array-type micro-image and the micro-lens array is within the focal length range of the micro-lens.

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