CN116047789A - Anti-fake prism grating sheet for spatially positioning naked eye stereoscopic display hidden image - Google Patents
Anti-fake prism grating sheet for spatially positioning naked eye stereoscopic display hidden image Download PDFInfo
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- CN116047789A CN116047789A CN202211683334.4A CN202211683334A CN116047789A CN 116047789 A CN116047789 A CN 116047789A CN 202211683334 A CN202211683334 A CN 202211683334A CN 116047789 A CN116047789 A CN 116047789A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
Abstract
The invention discloses a space positioning naked eye stereoscopic display hidden image anti-counterfeiting prism grating sheet, which comprises a substrate layer, wherein the upper surface of the substrate layer is provided with a prism grating layer, the prism grating layer comprises a left eye prism structure group and a right eye prism structure group, the inclined edge of the left eye prism structure group enables outgoing light to be converged to a left eye focusing point, the inclined edge of the right eye prism structure group enables outgoing light to be converged to a right eye focusing point, the lower surface of the substrate layer is provided with a microimage layer, the microimage layer opposite to the left eye prism structure group forms a left eye image, and the microimage layer opposite to the right eye prism structure group forms a right eye image. The invention has the beneficial effects that: the stereoscopic display effect of the space setting position can be realized, meanwhile, other positions have no stereoscopic effect or only can see the interference image, decoding sheets are not needed, the difficulty of fake making is greatly increased, and meanwhile, a consumer can easily find the watched position according to the position information provided by a merchant to see the stereoscopic image.
Description
Technical Field
The invention belongs to the technical field of image anti-counterfeiting, and particularly relates to a space positioning naked eye three-dimensional display hidden image anti-counterfeiting prism grating sheet.
Background
Currently, 3D products are increasingly popular in the market, and with the heat of 3D movies and televisions, the market demand of products with deep stereoscopic impression is also driven, and the production and manufacture of packaging boxes by using extruded lenticular grating sheets are quite common. The lenticular three-dimensional display is to make images with different angles respectively enter two eyes of a person by utilizing the refraction and light-splitting principle of a lenticular structure, so that a three-dimensional effect is formed in the brain. However, as the surface of the lenticular grating is of an arc structure, the refraction angles of all the points are different, so that the lenticular grating stereoscopic display needs a plurality of angles of images, namely the lenticular grating needs to design a multi-view parallax image, and meanwhile, the images with different angles are easy to enter the same eye by multiple views, so that the stereoscopic experience is poor.
Meanwhile, the anti-counterfeiting technical means in the market mainly comprise two-dimensional bar codes, laser labels, electronic information codes and the like, and the anti-counterfeiting technologies are easy to imitate or have high manufacturing cost, and special instruments, telephones, networks and the like are required for inquiry, so that the quick identification of consumers is not facilitated.
The hidden anti-counterfeiting method is widely researched and applied as a method for rapidly identifying anti-counterfeiting information, and the hidden image can be observed by matching decoding grating sheets matched with line numbers to a corresponding angle through slightly changing the mesh points of a hidden image area. This method requires the aid of a raster decoding chip, which is inconvenient for the purchaser to check in time. Meanwhile, the existing hidden anti-counterfeiting method is realized on a two-dimensional plane, and the combination anti-counterfeiting is performed by lacking the position information of a three-bit space.
Disclosure of Invention
The invention aims at: the invention provides a space positioning naked eye three-dimensional display hidden image anti-counterfeiting prism grating sheet, which solves the problem of lacking a three-dimensional anti-counterfeiting method in the prior art.
The aim of the invention is achieved by the following technical scheme:
the utility model provides a three-dimensional display hidden image anti-fake prism grating piece of naked eye of space location, including the substrate layer, the upper surface on substrate layer is equipped with the prism grating layer, the prism grating layer includes left eye prism structure group and right eye prism structure group, the slope limit of left eye prism structure group makes outgoing light assemble to left eye focus, the slope limit of right eye prism structure group makes outgoing light assemble to right eye focus, the lower surface on substrate layer is equipped with the microimage layer, constitute left eye image with the microimage layer that left eye prism structure is organized relatively, constitute right eye image with the microimage layer that right eye prism structure is organized relatively.
Further, the substrate layer and the prism grating layer form two layers, a bidirectional lifting transparent film is used as the substrate layer, then a layer of UV adhesive is coated on the surface, and the prism grating layer is formed by pressing a prism grating mould and is adhered on the substrate layer.
Furthermore, the substrate layer and the prism grating layer are of an integrated structure, and the prism grating roller is directly extruded, cooled and shaped into a prism grating sheet by adopting PET, PC, PP, PVC transparent plastic through an extrusion process.
Further, the surface of the micro-image layer is printed with a layer of gloss oil, covered with a layer of pearly-lustre film or electroplated with a layer of metal reflective layer.
Further, the distance between the left eye and the right eye is 0.3-1.5 m.
Furthermore, the prism structure of the prism grating layer is a right-angle triangular prism structure, the inclination angle of the inclined side of the prism structure is 5-38 degrees, the widths of the prism structures are the same, and the widths of the prism structures are 0.1-0.5 mm.
Further, the left-eye prism structure group and the right-eye prism structure group are formed by combining a plurality of prism structures, the first prism structure of the left-eye prism structure group is connected with the last prism structure of the right-eye prism structure group, and the prism structures of the left-eye prism structure group and the right-eye prism structure group are sequentially and alternately arranged until the last prism structure of the left-eye prism structure group is connected with the first prism structure of the right-eye prism structure group.
Further, the left-eye prism structure group and the right-eye prism structure group are mirror images.
Further, the microimage layer is composed of two images A and B with different angles, which are shot by a double-view camera or processed by software of the same object, and the images A and B are respectively divided into A1A1', A2A2', …, an 'and B1B1', B2B2', … and BnBn' according to the width of the prism structure, then the images A1', A2', …, an 'and B1', B2', … and Bn' are deleted and rearranged into parallax dislocation image layers with different angles, namely A1B1, A2B 2, … and An Bn.
Furthermore, parallel sides are arranged at two ends of the inclined side of the prism grating layer, and the microimage layer opposite to the parallel sides forms an interference image.
Furthermore, the micro image layer is composed of two images A and B with different angles and An interference image C which are shot or processed by the same object double-view camera, divided into A1A1', A2A2', …, an ', B1B1', B2B2', …, bnBn' and C1C1'C1, C2C2' C2, …, cn 'Cn according to the width of the prism grating structure, then deleting A1', A2', …, an', B1', B2', …, bn 'and C1', C2', …, cn', and rearranging into C1A 1C 1B1C1, C2A 2C 2B2C2, …, cnAnCnBnCn, and combining into parallax dislocation images with two different angles and interference image layers.
The invention has the beneficial effects that: the stereoscopic display effect of the space setting position can be realized, meanwhile, other positions have no stereoscopic effect or only can see the interference image, decoding sheets are not needed, the difficulty of fake making is greatly increased, and meanwhile, a consumer can easily find the watched position according to the position information provided by a merchant to see the stereoscopic image. Because the scheme of the double-viewpoint image is adopted, the printing difficulty is greatly reduced, and the method can be widely applied to the field of various anti-counterfeiting packaging products.
The foregoing inventive subject matter and various further alternatives thereof may be freely combined to form a plurality of alternatives, all of which are employable and claimed herein; and the invention can be freely combined between the (non-conflicting choices) choices and between the choices and other choices. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a light refraction schematic diagram of the prism structure of the present invention in a right-angle triangular structure.
FIG. 3 is a schematic view of a combined focus of different prism structures of the present invention.
Fig. 4 is a schematic view of the focusing of two sets of prismatic structures (left and right eye) of the present invention, respectively.
Fig. 5 is a schematic diagram of a focusing human eye after two prism structure sets of the present invention are combined.
FIG. 6 is a schematic diagram of a two-angle image dislocation extraction rearrangement of the present invention.
Fig. 7 is a schematic diagram of a combination of a single prism structure and a view error bitmap of the present invention.
Fig. 8 is a schematic diagram of a one-to-one combination focusing human eye of the prism grating sheet and the microimage layer of the present invention.
FIG. 9 is a schematic representation of the misalignment extraction rearrangement of two angles of image and interference image of the present invention.
Fig. 10 is a schematic diagram of the combination of the single prism structure and the parallax dislocation and interference pattern composite image of the present invention.
In the figure: 1-substrate layer, 2-prism grating layer, 3-microimage layer, 201-left-eye prism structure group, 202-right-eye prism structure group, 301-left-eye image, 302-right-eye image, 303-interference image.
Detailed Description
The following non-limiting examples illustrate the invention.
Example 1:
referring to fig. 1, a spatially positioned naked eye stereoscopic display hidden image anti-counterfeiting prism grating sheet comprises a substrate layer 1, a prism grating layer 2 and a microimage layer 3.
The substrate layer 1 and the prism grating layer 2 form two layers, a bidirectional lifting transparent film is used as the substrate layer 1, then a layer of UV adhesive is coated on the surface, and the prism grating layer 2 is formed by pressing a prism grating mould and is adhered on the substrate layer 1.
Or the substrate layer 1 and the prism grating layer 2 are of an integrated structure, and the prism grating roller is directly extruded, cooled and shaped into a prism grating sheet by adopting PET, PC, PP, PVC transparent plastic through an extrusion process.
In order to improve the stereoscopic image effect of the prism grating sheet, a layer of gloss oil is printed on the surface of the microimage layer 3, and a layer of pearlized film is coated or a metal reflecting layer is electroplated.
Referring to fig. 4 and 5, the upper surface of the substrate layer 1 is provided with a prism grating layer 2, and the prism grating layer 2 includes a left-eye prism structure group 201 and a right-eye prism structure group 202, where the left-eye prism structure group 201 and the right-eye prism structure group 202 are formed by combining a plurality of prism structures. The inclined angle of the inclined edge of the prism structure is 5-38 degrees, and the widths of the prism structures are the same and are 0.1-0.5 mm.
The prism structure of the prism grating layer 2 adopts a right-angle triangular prism structure, and the inclination angle (the included angle between the hypotenuse and the bottom edge of the parallel surface) of each prism structure is designed according to the set viewing position and the distance between eyes, so that emergent rays can be converged at two different spatial position points above the prism grating sheet.
So that the oblique side of the left-eye prism structure group 201 converges the outgoing light to the left-eye focus point and the oblique side of the right-eye prism structure group 202 converges the outgoing light to the right-eye focus point, and the distances between the left-eye and right-eye focus points are kept the same and are 0.3-1.5 m.
Referring to fig. 6 and 7, a microimage layer 3 is disposed on the lower surface of the substrate layer 1, and the microimage layer 3 is formed by extracting and rearranging two images with different angles according to the width dislocation of the prism structure of the prism grating sheet, and has a one-to-one correspondence with the prism structure. The microimage layer 3 opposite the left-eye prism structure set 201 constitutes a left-eye image 301 and the microimage layer 3 opposite the right-eye prism structure set 202 constitutes a right-eye image 302.
Referring to fig. 8, according to the above arrangement, the eyes can see images of different angles when viewing at the set position, thereby presenting a stereoscopic effect in the brain, whereas the stereoscopic effect is not seen at the non-set position.
In order to better understand how the prism structure of the prism grating sheet is designed, thereby realizing a stereoscopic effect at a set spatial position, a detailed description is provided below.
Referring to fig. 2 and 3, the prism structure of the prism grating layer adopts a right-angle triangular prism structure, and the light refraction principle is as follows: when light enters air from the hypotenuse of the prism structure of the prism grating layer, the light enters the light-sparse medium from the dense medium, the emergent direction is deflected according to the refraction law, and the emergent angle is larger than the incident angle. When two or more prism structures are combined, the focusing position of emergent light can be obtained according to different inclination angles; conversely, the focusing position may also be used to set the tilt angle of the prismatic structure.
Referring to fig. 4 and 5, based on the above refraction principle, the prism structure of the prism grating layer is specifically designed as follows: the prism grating layer 2 includes a left-eye prism structure group 201 and a right-eye prism structure group 202, and the left-eye prism structure group 201 and the right-eye prism structure group 202 are mirror images of each other.
The first prism structure of the left-eye prism structure group 201 is connected with the last prism structure of the right-eye prism structure group 202, and the prism structures of the left-eye prism structure group 201 and the right-eye prism structure group 202 are sequentially arranged in a crossed manner until the last prism structure of the left-eye prism structure group 201 is connected with the first prism structure of the right-eye prism structure group 202.
In the two prism structure groups, the inclination angle of each prism structure of the left-eye prism structure group 201 is designed so that the prism structure can be focused at a position which coincides with the position where the human eye needs to watch the stereoscopic effect, and then the right-eye prism structure group 202 is the same.
Referring to fig. 6 and 7, the microimage layer 3 is composed of two images a and B of different angles photographed by a dual view camera or processed by software using the same object, and is divided into A1', A2', …, an 'and B1', B2', …, bnBn' according to the width of the prism structure, and then A1', A2', …, an 'and B1', B2', …, bn' are deleted and rearranged into parallax dislocation image layers of two different angles, A1B1, A2B 2, …, an Bn, respectively.
Example 2:
referring to fig. 1, a spatially positioned naked eye stereoscopic display hidden image anti-counterfeiting prism grating sheet comprises a substrate layer 1, a prism grating layer 2 and a microimage layer 3.
The upper surface of the substrate layer 1 is provided with a prism grating layer 2, the prism grating layer 2 comprises a left-eye prism structure group 201 and a right-eye prism structure group 202, and the left-eye prism structure group 201 and the right-eye prism structure group 202 are formed by combining a plurality of prism structures. The inclined angle of the inclined edge of the prism structure is 5-38 degrees, and the widths of the prism structures are the same and are 0.1-0.5 mm.
The hypotenuse of the prism grating layer 2 prism structure adopts the design of adding an upper section parallel side and a lower section parallel side with a middle inclined side, the parallel side part enables light to directly exit, the inclined side part enables the light to be refracted, and the inclined angle (the included angle between the inclined line of the hypotenuse and the bottom edge of the parallel surface) of each prism structure is designed according to the set watching position and the distance between eyes, so that the exiting light can be converged at two different spatial position points above the prism grating sheet.
So that the oblique side of the left-eye prism structure group 201 converges the outgoing light to the left-eye focus point and the oblique side of the right-eye prism structure group 202 converges the outgoing light to the right-eye focus point, and the distances between the left-eye and right-eye focus points are kept the same and are 0.3-1.5 m.
Referring to fig. 9 and 10, a microimage layer 3 is disposed on the lower surface of the substrate layer 1, the microimage layer 3 is formed by extracting and rearranging two images with different angles and an interference image 303 according to the width dislocation of the prism structure of the prism grating layer, and has a one-to-one correspondence with the prism structure, wherein the images with different angles correspond to the inclined edge part of the hypotenuse of the prism structure, and the interference image 303 corresponds to the parallel edge part of the hypotenuse of the prism structure. The microimage layer 3 opposite the left-eye prism structure set 201 constitutes a left-eye image 301 and the microimage layer 3 opposite the right-eye prism structure set 202 constitutes a right-eye image 302.
According to the arrangement, when the eyes watch at the set positions, the eyes can see images at different angles, so that a stereoscopic effect is shown in the brain, and otherwise, interference images are seen at the non-set positions.
The micro image layer 3 is composed of two images A and B and An interference image C which are photographed by a double-viewpoint camera or processed by software of the same object and are respectively divided into A1A1', A2A2', …, an ', B1B1', B2B2', …, bnBn' and C1C1'C1, C2C2' C2, … and CnCn 'Cn according to the width of a prism grating structure, then the A1', A2', …, an', B1', B2', …, bn 'and C1', C2', … and Cn' are deleted and rearranged into parallax images of the two different angles and the interference image layer is formed by rearranging the parallax images of the C1A 1C 1B1C1, C2A 2C2, … and CnCnCnBnCn.
Otherwise, the same as in example 1 was conducted.
The foregoing basic embodiments of the invention, as well as other embodiments of the invention, can be freely combined to form numerous embodiments, all of which are contemplated and claimed. In the scheme of the invention, each selection example can be arbitrarily combined with any other basic example and selection example.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The utility model provides a space location bore hole stereoscopic display hidden image anti-fake prism grating piece, includes substrate layer (1), its characterized in that: the upper surface of substrate layer (1) be equipped with prism grating layer (2), prism grating layer (2) are including left eye prism structure group (201) and right eye prism structure group (202), the slope limit of left eye prism structure group (201) makes the outgoing light assemble to left eye focus, the slope limit of right eye prism structure group (202) makes the outgoing light assemble to right eye focus, the lower surface of substrate layer (1) is equipped with microimage layer (3), microimage layer (3) relative with left eye prism structure group (201) constitute left eye image (301), microimage layer (3) relative with right eye prism structure group (202) constitute right eye image (302).
2. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, wherein: the substrate layer (1) and the prism grating layer (2) form two layers, a bidirectional lifting transparent film is used as the substrate layer (1), then a layer of UV adhesive is coated on the surface, and the prism grating layer (2) is formed by pressing a prism grating mould and is adhered on the substrate layer (1).
3. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, wherein: the substrate layer (1) and the prism grating layer (2) are of an integrated structure, and the prism grating roller is directly extruded, cooled and shaped into a prism grating sheet by adopting PET, PC, PP, PVC transparent plastic through an extrusion process.
4. A spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, 2 or 3, characterized by: the surface of the microimage layer (3) is printed with a layer of gloss oil, covered with a layer of pearly-lustre film or electroplated with a layer of metal reflective layer.
5. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, wherein: the distance between the focusing points of the left eye and the right eye is 0.3-1.5 m; the prism structure of the prism grating layer (2) is a right-angle triangular prism structure, the inclination angle of the inclined side of the prism structure is 5-38 degrees, the widths of the prism structures are the same, and the widths of the prism structures are 0.1-0.5 mm.
6. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, wherein: the left-eye prism structure group (201) and the right-eye prism structure group (202) are formed by combining a plurality of prism structures, a first prism structure of the left-eye prism structure group (201) is connected with a last prism structure of the right-eye prism structure group (202), and the prism structures of the left-eye prism structure group (201) and the right-eye prism structure group (202) are sequentially and alternately arranged until the last prism structure of the left-eye prism structure group (201) is connected with the first prism structure of the right-eye prism structure group (202).
7. The spatially-oriented autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1 or 6, characterized by: the left-eye prism structure group (201) and the right-eye prism structure group (202) are mirror images.
8. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, wherein: the micro image layer (3) is composed of two images A and B with different angles, which are shot by a double-view camera of the same object or processed by software, and the images A and B are respectively divided into A1A1', A2A2', …, an 'and B1B1', B2B2', … and BnBn' according to the width of a prism structure, then the images A1', A2', …, an 'and B1', B2', … and Bn' are deleted and rearranged into parallax dislocation image layers with different angles, namely A1B1, A2B 2, … and An Bn.
9. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet according to claim 1, wherein: parallel sides are arranged at two ends of the inclined side of the prism grating layer (2), and the microimage layer (3) opposite to the parallel sides forms an interference image (303).
10. The spatially-positioned autostereoscopic display hidden image anti-counterfeit prism grating sheet of claim 9, wherein: the micro image layer (3) is composed of two images A and B with different angles and An interference image C which are shot or processed by the same object double-view camera, divided into A1A1', A2A2', …, anan ', B1B1', B2B2', …, bnBn' and C1C1'C1, C2C2' C2, …, cn 'Cn according to the width of the prism grating structure, then, deleting A1', A2', …, an', B1', B2', …, bn 'and C1', C2', … and Cn', and rearranging into C1A 1C 1B1C1, C2A 2C 2B2C2, … and CnAnCnBnCn to form parallax dislocation images and interference image layers with two different angles.
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| CN202211683334.4A CN116047789A (en) | 2022-12-27 | 2022-12-27 | Anti-fake prism grating sheet for spatially positioning naked eye stereoscopic display hidden image |
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| CN202211683334.4A CN116047789A (en) | 2022-12-27 | 2022-12-27 | Anti-fake prism grating sheet for spatially positioning naked eye stereoscopic display hidden image |
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