CN217278993U - Optical anti-counterfeiting element with additive micro-relief three-dimensional structure - Google Patents
Optical anti-counterfeiting element with additive micro-relief three-dimensional structure Download PDFInfo
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- CN217278993U CN217278993U CN202221061210.8U CN202221061210U CN217278993U CN 217278993 U CN217278993 U CN 217278993U CN 202221061210 U CN202221061210 U CN 202221061210U CN 217278993 U CN217278993 U CN 217278993U
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Abstract
An optical anti-counterfeiting element with an additive micro-relief three-dimensional structure comprises a substrate, a micro-relief three-dimensional structure layer and a reflecting medium layer; wherein the base material is a transparent or semitransparent flaky base material; the micro relief three-dimensional structure layer is arranged on the lower surface of the substrate and comprises a micro lens array structure and a micro image-text array structure, and the micro image-text array structures are superposed on the lower surface of the micro lens array structure; the reflecting medium layer is arranged on the lower surface of the micro-relief three-dimensional structure layer. The utility model provides an add type optics anti-fake element of little relief (sculpture) spatial structure, it can provide unique 3D visual effect, and visual effect is more outstanding, and anti-fake performance is better, meanwhile can also the reduction production degree of difficulty, reduction in production cost.
Description
Technical Field
The utility model relates to an optics anti-fake technical field, concretely relates to little relief (sculpture) spatial structure's of addition formula optics anti-fake element.
Background
The prior art CN1271106 discloses a microlens micro-pattern combined film, which is composed of three layers, wherein the uppermost layer is a microlens array layer 1 made of transparent PVC material, the middle layer is a plastic substrate layer 2 made of transparent PVC material, the lowermost layer is a micro-pattern layer 3 directly printed and attached to the lower surface of the plastic substrate layer 2PVC material, and the structure of the micro-pattern is matched with the structure of the microlens array.
The microlens and micro-pattern combined film provided by the above prior art CN1271106 has the following technical defects:
1) the whole combined PVC structural material is extremely high in consumption, not environment-friendly and high in cost;
2) the combined film cannot simultaneously satisfy the condition of presenting various complicated amplifiers;
3) when the 3-layer PVC structure is compounded by the adhesive, the image-text distortion and the alignment deviation between the lens and the micro image-text are easily caused by the tension deformation and the thermal deformation of the resin film.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's not enough, the utility model aims to provide an add type optics anti-fake element of little relief (sculpture) spatial structure, it can provide unique 3D visual effect, and visual effect is more outstanding, and anti-fake performance is better, and meanwhile the reduction in production degree of difficulty reduces manufacturing cost.
In order to solve the above problems, the utility model adopts the following technical scheme:
an optical anti-counterfeiting element with an additive micro-relief three-dimensional structure comprises a substrate, a transparent or semitransparent sheet substrate, a transparent or semitransparent layer substrate and a transparent or semitransparent layer substrate; the micro-relief three-dimensional structure layer is arranged on the lower surface of the substrate and comprises a micro-lens array structure and a micro-image-text array structure, and the micro-image-text array structures are superposed on the lower surface of the micro-lens array structure; and the reflecting medium layer is arranged on the lower surface of the micro-relief three-dimensional structure layer.
Further, the microlens array structure includes a plurality of microlens array units arranged in a linear matrix.
Further, the micro graphic and text array structure comprises a plurality of micro graphic and text array units arranged in a linear matrix, and each micro graphic and text array unit is correspondingly arranged on the lower surface of each micro lens array unit.
Furthermore, the microlens array unit is a concave microlens array unit, and the concave surface of the corresponding concave microlens array unit is recessed inwards compared with the micro image-text array unit.
Further, the concave microlens array unit is a semicircular concave microlens array unit.
Furthermore, the microlens array unit is a convex microlens array unit, and the convex surface of the microlens array unit protrudes outwards compared with the convex surface of the corresponding convex microlens array unit.
Further, the convex microlens array unit is a semicircular convex microlens array unit.
Further, the height of the micro image-text array structure is half of the height of the micro lens array structure.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides an add optical anti-counterfeiting element of little relief (sculpture) spatial structure of formula, its little relief (sculpture) spatial structure layer includes microlens array structure and little picture and text array structure, and little picture and text array structure adds the coincide at the lower surface of microlens array structure, and it can provide unique 3D visual effect, reduces the production degree of difficulty simultaneously, reduces manufacturing cost; moreover, because the micro image-text layer array of the optical anti-counterfeiting element can be formed by superposing a plurality of image-texts with different periods, moire images with different depth of field can be displayed in the moire amplified image, moire images which float upwards, sink upwards, float upwards and sink downwards, float upwards and sink in a staggered manner and transit from the float upwards to a three-dimensional moire image are generated, different moire amplifiers and different anti-counterfeiting effects can be combined and patterned, the visual effect is more prominent, and the anti-counterfeiting performance is better.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an optical anti-counterfeiting element with a middle-additive micro-relief three-dimensional structure according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a preparation principle of an optical anti-counterfeiting element with a middle-additive micro-relief three-dimensional structure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an optical anti-counterfeiting element with a phase-additive micro-relief three-dimensional structure according to a second embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a principle of manufacturing an optical anti-counterfeiting element with a phase-additive micro-relief three-dimensional structure according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of an embodiment of the present invention in which an optical anti-counterfeiting element with an additive micro-relief three-dimensional structure exhibits a 3D dynamic visual effect;
fig. 6 is a schematic view of an optical security element with an additive micro-relief three-dimensional structure according to an embodiment of the present invention, which has a multi-dimensional moving visual effect;
the reference numbers illustrate:
1-substrate, 2-micro relief three-dimensional structure layer, 2 a-concave microlens array unit, 2 b-micro graph and text array unit, 3-reflecting medium layer, 10-substrate, 20-micro relief three-dimensional structure layer, 20 a-convex microlens array unit, 20 b-micro graph and text array unit, 30-reflecting medium layer
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an optical anti-counterfeiting element with a middle-phase-adding type micro-relief three-dimensional structure according to an embodiment of the present invention; fig. 2 is a schematic diagram of a preparation principle of an optical anti-counterfeiting element with a middle-phase-additive micro-relief three-dimensional structure according to an embodiment of the present invention.
The utility model provides an add type optical anti-counterfeiting element with micro relief stereo structure (hereinafter referred to as optical anti-counterfeiting element for short), as shown in figure 1 and figure 2, the optical anti-counterfeiting element comprises a substrate 1, a micro relief stereo structure layer 2 and a reflecting medium layer 3.
In this embodiment, the substrate 1 is a transparent or translucent sheet material, and the thickness thereof is generally 15 to 50 micrometers, the substrate may be at least partially transparent, or may be a colored dielectric layer, or may be a multilayer film formed by compounding, and generally, the substrate is formed by a thin film material with good physical and chemical resistance and high mechanical strength, for example: plastic films such as polyethylene terephthalate (PET) film, polyethylene naphthalate (PEN) film, and biaxially oriented polypropylene (BOPP) film, preferably a polyethylene terephthalate (PET) film having a thickness of 15 μm.
In this embodiment, the micro-relief three-dimensional structure layer 2 is disposed on the lower surface of the substrate 1, and the micro-relief three-dimensional structure layer 2 includes a micro-lens array structure and a micro-image-text array structure.
In this embodiment, the micro-relief three-dimensional structure layer 2 is an additive micro-relief three-dimensional structure layer, that is, the micro-image-text array structure is disposed on the lower surface of the micro-lens array structure in an overlapping manner.
As shown in fig. 1, the microlens array structure includes a plurality of microlens array units arranged in a linear matrix, in this embodiment, the microlens array units are concave microlens array units 2a, and the concave microlens array units 2a are in a shape of a semicircle.
Referring to fig. 1 again, the micro image-text array structure includes a plurality of micro image-text array units 2b arranged in a linear matrix, in this embodiment, each micro image-text array unit 2b is correspondingly stacked on the concave surface of each concave microlens array unit 2a, that is, the surface topography and curvature of the micro image-text array structure and the microlens array structure are added and stacked, so that the micro image-text array structure is stacked on the surface of the microlens array structure, and the micro relief three-dimensional structure layer 2 can be synthesized.
In this embodiment, the concave surface of the corresponding concave microlens array unit 2a is more concave than the concave surface of the corresponding concave microlens array unit 2b, so as to realize moire magnification.
Further preferably, compared with the concave microlens array unit 2a which is correspondingly overlapped, the height of the microlens array unit 2b is half of the height of the concave microlens array unit 2a, and half of the space height is allocated to each of the microlens and the microlens under the limited photoresist thickness.
In this embodiment, the reflective medium layer 3 is disposed on the lower surface of the micro-relief three-dimensional structure layer 2, specifically, the reflective medium layer 3 covers the lower surface of the micro-relief three-dimensional structure layer 2, and specifically, the reflective medium layer 3 covers the lower surface of the micro-relief three-dimensional structure layer 2 through coating, printing, deposition, and other manners.
Preferably, the reflective medium layer 3 may include any one or a combination of the following various plating layers:
a single-layer metal coating; when a single metal coating is used as the reflective medium layer 3, different colors of the reflected light can be affected, for example: metal bright white, matt, transparent, cyan, yellow, etc.
A plurality of metal coatings; the multi-layer metal plating layer can realize color change because of different reflection and absorption of different plating layers.
The coating is formed by sequentially stacking an absorption layer, a low-refractive-index dielectric layer and a reflection layer, and the absorption layer is in contact with the lower surface of the micro-relief three-dimensional structure layer 2; the stacked plating layers with the absorption layers can also realize color change, and the cost is higher than that of the layers of metal and is lower.
A high refractive index dielectric layer coating;
a multi-medium layer coating formed by sequentially stacking a first high-refractive-index medium layer, a low-refractive-index medium layer and a second high-refractive-index medium layer, wherein the first high-refractive-index medium layer is in contact with the lower surface of the micro-relief three-dimensional structure layer 2;
and a coating formed by sequentially stacking an absorption layer, a high-refractive-index medium layer and a reflection layer, wherein the absorption layer is in contact with the lower surface of the micro-relief three-dimensional structure layer 2.
Among them, Al or ZnS is preferable as the material of the single-layer metal plating layer.
The high-refractive-index dielectric layer coating, the first high-refractive-index dielectric layer, the low-refractive-index dielectric layer and the second high-refractive-index dielectric layer are dielectric layers with refractive indexes more than or equal to 1.7, and the materials can be one of ZnS, TiN, TiO2, TiO, Ti2O3, Ti3O5, Ta2O5, Nb2O5, CeO2, Bi2O3, Cr2O3, Fe2O3, HfO2, ZnO and the like;
the low-refractive-index dielectric layer is a dielectric layer with the refractive index smaller than 1.7, the material of the low-refractive-index dielectric layer can be MgF2 or SiO2, and the like, and the material of the metal plating layer and the reflecting layer can be one metal of Al, Cu, Ni, Cr, Ag, Fe, Sn, Au, Pt, and the like, or the mixture and the alloy thereof;
the material of the absorption layer may be one of Cr, Ni, Cu, Co, Ti, V, W, Sn, Si, Ge, etc., or a mixture and alloy thereof.
In this embodiment, the optical anti-counterfeiting element can provide a unique 3D visual effect that naked eyes 3D, dynamic 3D and micro characters can move in multiple dimensions, as shown in fig. 5, the micro images, texts and stars of the optical anti-counterfeiting element present a flickering dynamic visual effect that appears and disappears with the movement of a viewing angle, as shown in fig. 6, the optical anti-counterfeiting element is observed from different viewing angles, and the micro images, a and B, of the optical anti-counterfeiting element present a visual effect that moves in different dimensions; the refractive index range of the optical anti-counterfeiting element is 1.3-1.7, the imaging quality of a Moire amplifier is high, a micro image-text layer array of the optical anti-counterfeiting element is formed by overlapping a plurality of image-texts with different periods, the hierarchical difference is displayed in a Moire amplification image, namely Moire images with different depths of view generate three-dimensional Moire images which float upwards, sink upwards, float upwards + sink downwards, float upwards and sink upwards in a staggered way, and sink downwards to float upwards.
In this embodiment, referring to fig. 2, the following illustrates the structure forming manner of the micro-relief three-dimensional structure layer 2, and how the micro-relief three-dimensional structure layer 2 is disposed on the lower surface of the substrate 1.
Carrying out space three-dimensional framework modulation on the designed micro image-text array P and the convex micro lens array L +, and synthesizing the surface appearance and the curvature of the micro image-text array P and the convex micro lens array L + by adopting a union set superposition method to obtain a micro relief three-dimensional microstructure N;
then recording the micro-relief three-dimensional microstructure N on a photosensitive adhesive layer D on the photoetching glass through exposure and development, forming a micro-relief three-dimensional structure array A on the photosensitive adhesive layer D on the photoetching glass, and then carrying out chemical plating and electroplating to obtain a metal nickel plate F;
copying a micro-relief three-dimensional structure array A on the metal nickel plate by adopting an imprinting method, combining and arranging holographic laser effects according to the packaging design requirement to obtain a composite mold of a micro-relief three-dimensional structure array B, and then carrying out chemical plating and electroplating to obtain a metal nickel plate N of the composite mold;
then copying the micro-relief three-dimensional structure array B on the metal nickel plate N of the composite mould onto the surface of one side of the substrate 1 by adopting a rotary nanoimprint lithography method, and forming a micro-relief three-dimensional structure layer 2 on the surface of one side of the substrate 1 after curing, wherein the micro-image-text array structure is superposed on the surface of the micro-lens array structure; and finally, arranging a reflecting medium layer 3 on the surface of the micro-relief three-dimensional structure layer 2 to obtain the optical anti-counterfeiting element of the embodiment.
Example two:
referring to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of an optical anti-counterfeiting element with an additive micro-relief three-dimensional structure in an embodiment two of the present invention, and fig. 4 is a schematic preparation principle diagram of an optical anti-counterfeiting element with an additive micro-relief three-dimensional structure in an embodiment two of the present invention.
In this embodiment, the micro-relief three-dimensional structure layer 20 is also an additive micro-relief three-dimensional structure layer, that is, the micro-image-text array structure is distributed on the lower surface of the micro-lens array structure.
The present embodiment is different from the first embodiment in that, as shown in fig. 3, the microlens array structure includes a plurality of convex microlens array units 20a arranged in a linear matrix, the convex microlens array units 20a are substantially semicircular, and two adjacent convex microlens array units 20a are directly connected end to end without a gap.
Referring to fig. 3 again, the micro image-text array structure includes a plurality of micro image-text array units 20b arranged in a linear matrix, in this embodiment, each micro image-text array unit 20b is correspondingly arranged on a convex surface of each convex micro lens array unit 20a, that is, the surface topography and curvature of the micro image-text array structure and the micro lens array structure are added and superimposed, so that the micro image-text array structure is superimposed on the surface of the micro lens array structure, and the micro relief three-dimensional structure layer 20 is obtained by synthesis.
In this embodiment, the micro image-text array unit 20b protrudes outward more than the convex surface of the corresponding convex microlens array unit 20a, thereby realizing moire magnification.
Other configurations similar to those in the first embodiment are not described in detail.
In this embodiment, referring to fig. 4, the structure forming manner of the micro-relief three-dimensional structure layer 20, and how the micro-relief three-dimensional structure layer 20 is disposed on the lower surface of the substrate 10 are the same as the principle of the first embodiment, and are not described herein again.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (8)
1. An optical anti-counterfeiting element with an additive micro-relief three-dimensional structure is characterized in that: which comprises
A substrate which is a transparent or translucent sheet-like substrate;
the micro-relief three-dimensional structure layer is arranged on the lower surface of the base material and comprises a micro-lens array structure and a micro-image-text array structure, and the micro-image-text array structures are superposed on the lower surface of the micro-lens array structure;
and the reflecting medium layer is arranged on the lower surface of the micro-relief three-dimensional structure layer.
2. An additive micro-relief three-dimensional structured optical security element according to claim 1, wherein: the micro-lens array structure comprises a plurality of micro-lens array units which are arranged in a linear matrix.
3. An additive micro-relief three-dimensional structured optical security element according to claim 2, wherein: the micro image-text array structure comprises a plurality of micro image-text array units arranged in a linear matrix, and each micro image-text array unit is correspondingly arranged on the lower surface of each micro lens array unit.
4. An additive micro-relief three-dimensional structure optical security element according to claim 3, wherein: the micro-lens array unit is a concave micro-lens array unit, and the concave surface of the micro-image-text array unit is concave inwards compared with the concave surface of the corresponding concave micro-lens array unit.
5. An additive micro-relief three-dimensional structured optical security element according to claim 4, wherein: the concave microlens array unit is a semicircular concave microlens array unit.
6. An additive micro-relief three-dimensional structured optical security element according to claim 3, wherein: the micro-lens array unit is a convex micro-lens array unit, and the convex surface of the micro-image-text array unit is convex outwards compared with the convex surface of the corresponding convex micro-lens array unit.
7. An additive micro-relief three-dimensional structured optical security element according to claim 6, wherein: the convex micro-lens array unit is a semicircular convex micro-lens array unit.
8. An additive micro-relief three-dimensional optical security element according to any of claims 1 to 7, wherein: the height of the micro graphic and text array structure is half of the height of the micro lens array structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221061210.8U CN217278993U (en) | 2022-05-05 | 2022-05-05 | Optical anti-counterfeiting element with additive micro-relief three-dimensional structure |
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| CN202221061210.8U CN217278993U (en) | 2022-05-05 | 2022-05-05 | Optical anti-counterfeiting element with additive micro-relief three-dimensional structure |
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| CN217278993U true CN217278993U (en) | 2022-08-23 |
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