CN113568182A - Local bright light variable image optical system and manufacturing method thereof - Google Patents
Local bright light variable image optical system and manufacturing method thereof Download PDFInfo
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- CN113568182A CN113568182A CN202010352036.1A CN202010352036A CN113568182A CN 113568182 A CN113568182 A CN 113568182A CN 202010352036 A CN202010352036 A CN 202010352036A CN 113568182 A CN113568182 A CN 113568182A
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Abstract
The invention discloses a local brightness variable image optical system and a manufacturing method thereof. A local-bright-light variable image optical system comprising: a microlens array layer; the substrate layer is transparent and is positioned below the micro-lens array layer; the image-text structure is positioned below the base material layer and distributed on the local part of the base material layer; and the coating only covers the surface of the image-text structure and is used for enhancing the brightness of the image-text structure. The invention can realize that only the needed image generates the three-dimensional or variable effect through the local light of the image-text structure, and other parts are transparent, thus not only not influencing the expression of other patterns when being combined with other printed products for use, but also increasing the embellishment of the three-dimensional or variable effect at the needed places, and greatly increasing the aesthetic degree and the attraction of the printed products.
Description
Technical Field
The invention belongs to the field of optics, and particularly relates to a local brightness variable image optical system and a manufacturing method thereof.
Background
The realization of 3D stereoscopic effect or variable image effect by the lenticular lens is a full-width effect, and the organic combination of the stereoscopic or variable effect with other patterns cannot be realized, which results in a great limitation in its application field. The traditional patterns with grating stereo and variable effects are printed by ink, and can not be fused with common laser holographic effects in the current market. Because the laser holographic effect needs the metal coating just can realize dazzling various effect, and the metal coating can only realize whole breadth, and local cladding material needs follow-up accurate cladding material to get rid of, and this has very big technical difficulty at present.
Disclosure of Invention
The invention provides a local brightness variable image optical system and a manufacturing method thereof, aiming at overcoming the defect that the traditional 3D (three-dimensional) effect or variable image effect is the whole effect in the prior art.
The invention solves the technical problems through the following technical scheme:
a local-bright-variable-image optical system comprising:
a microlens array layer;
the substrate layer is transparent and is positioned below the micro-lens array layer;
the image-text structure is positioned below the base material layer and distributed on the local part of the base material layer; and
and the coating only covers the surface of the image-text structure and is used for enhancing the brightness of the image-text structure.
Preferably, the graphic structure is a macro sequence diagram or a micro graphic array.
Preferably, the image-text structure is a concave structure or a convex structure.
Preferably, the concave depth of the concave structure or the convex height of the convex structure is 0.5 to 5 microns.
Preferably, the concave depth of the concave structure or the convex height of the convex structure is 1 to 3 microns.
Preferably, the surface of the image-text structure is a plane or a grating structure.
Preferably, the microlens array layer is a micro cylindrical lens array or a micro round lens array.
Preferably, the material of the plating layer is any one of gold, silver, copper, aluminum and nickel.
A method for manufacturing a local-bright-variable image optical system, for manufacturing the local-bright-variable image optical system as described above, the method comprising:
manufacturing a micro-lens array layer on one side of a substrate;
making an image-text structure on the other side of the substrate;
forming a plating layer on one side of the substrate on which the image-text structure is manufactured;
removing the plating layer outside the surface of the image-text structure;
and cleaning and airing the product obtained in the previous step to obtain the final product.
Preferably, the process of forming the graphic structure on the other side of the substrate includes:
designing a photoetching file corresponding to the image-text structure according to the required image-text structure;
manufacturing a rubber plate corresponding to the image-text structure according to the photoetching file by using a photoetching machine;
manufacturing the rubber plate into a metal mould pressing plate by using an electrochemical deposition process;
manufacturing an image-text structure on the other side of the substrate by using the metal mould pressing plate;
and/or the presence of a gas in the gas,
removing the plating layer outside the surface of the image-text structure, comprising:
and removing the plating layer outside the surface of the image-text structure by an electrolytic technology process.
The positive progress effects of the invention are as follows: the invention can realize that only the needed image generates the three-dimensional or variable effect through the local light of the image-text structure, and other parts are transparent, thus not only not influencing the expression of other patterns when being combined with other printed products for use, but also increasing the embellishment of the three-dimensional or variable effect at the needed places, and greatly increasing the aesthetic degree and the attraction of the printed products. The invention also enables the local laser effect to be presented through the plating layer on the grating structure.
Drawings
Fig. 1 is a schematic view of a local-bright variable-image optical system according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a micro-cylindrical lens array;
FIG. 3 is a schematic diagram of a square array of micro-round lenses;
FIG. 4 is a schematic diagram of a hexagonal array of micro-round lenses;
FIG. 5 is a schematic combination diagram of macroscopic graphs A, B, C combined to obtain a macroscopic sequence diagram;
FIG. 6 is a schematic diagram of the correspondence relationship between the macro sequence diagram of FIG. 5 and the micro-cylindrical lens array;
FIG. 7 is a schematic diagram of the macro sequence diagram of FIG. 5 corresponding to the micro-circle lens array;
FIG. 8a is a schematic diagram of the arrangement of the micro image-text array when the arrangement of the micro circular lens array is regular hexagonal;
FIG. 8b is a schematic diagram of the arrangement of the micro image-text array when the arrangement of the micro circular lens array is square;
fig. 9 is a flowchart of a method for manufacturing a local brightness variable image optical system according to embodiment 1 of the present invention;
fig. 10 is a detailed flowchart of step S12;
FIG. 11 is a schematic illustration of the graphic structure and the substrate after aluminizing;
fig. 12 is a schematic view of a partial-bright variable-image optical system of example 1;
FIG. 13 is a perspective view of FIG. 12;
fig. 14 is a schematic view of a partial-bright variable-image optical system of example 2;
FIG. 15 is a top view of FIG. 14;
fig. 16 is a perspective view of fig. 14.
Fig. 17 is a schematic diagram of a partial-bright variable-image optical system of example 3.
Fig. 18 is a top view of fig. 17.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Fig. 1 is a schematic diagram of a local bright variable image optical system, which includes: microlens array layer 1, substrate layer 2, picture and text structure 3 and cladding material 4. The base material layer 2 is transparent and located below the microlens array layer 1. The image-text structure 3 is positioned below the substrate layer 2 and distributed on a part of the substrate layer 2. The coating 4 covers the surface of the image-text structure 3 and serves to enhance the brightness of the image-text structure 3.
The microlens array layer 1 is composed of a plurality of identical microlenses arranged in a certain period. The microlens array layer 1 may be a micro cylindrical lens array or a micro circular lens array. Fig. 2 is a schematic view of a micro-cylindrical lens array, having an array direction. Fig. 3 is a schematic diagram of a micro-circular lens array having two array directions, and the arrangement of the micro-circular lens array may be a square arrangement (as shown in fig. 3) or a regular hexagonal arrangement (as shown in fig. 4). In this embodiment, the aperture size of the microlens is 30 to 150 micrometers, and the height of the spherical cap is 15 to 75 micrometers.
The substrate layer 2 is a transparent film, and may be one of PET (polyethylene terephthalate), PP (polypropylene), PC (polycarbonate) and PVC (polyvinyl chloride). The thickness of the micro-lens array layer can be between 20 and 180 micrometers, and the specific thickness is consistent with the focal length of the micro-lens array layer 1.
From the shape of the graphic structure, the graphic structure 3 can be a concave structure or a convex structure. The concave depth of the concave structure or the convex height of the convex structure may be 0.5 to 5 micrometers, preferably 1 to 3 micrometers. The image-text structure 3 can be obtained by UV molding or hot molding. As shown in fig. 1, the graphic structure is an outer convex type, wherein the surface of the graphic structure 31 is a plane, and the surface of the graphic structure 32 has a grating structure.
From the display effect of the graphic structure, the surface of the graphic structure 3 can be a plane or a grating structure. The frequency of the grating structure may be between 80l/mm and 1200l/mm, where l/mm is the number of lines per mm and is the frequency parameter used to characterize the grating. If the surface of the image-text structure 3 is plane, the system can produce a local light effect at the image-text structure after having the coating 4. If the surface of the image-text structure 3 is of a grating structure, the system can generate a laser holographic effect at the image-text structure after the plating layer 4 is arranged.
The graphic structure 3 can be a macro sequence diagram or a micro graphic array from the display pattern of the graphic structure. The macro sequence diagram is formed by firstly dividing and then combining the graphs according to the arrangement period of the micro lens array layer and the number of the macro images contained in the sequence diagram, decomposing a plurality of macro images and then combining the macro images into a final sequence diagram. Fig. 5a, 5b, and 5c are schematic diagrams of sequence diagrams obtained by decomposing the macro graph A, B, C, respectively, and fig. 5d is a schematic diagram of the effect of the macro sequence diagram obtained by combining and combining the three sequence diagrams shown in fig. 5a, 5b, and 5 c. Fig. 6 is a schematic diagram showing the correspondence relationship between the merged macro sequence diagram and the micro-cylindrical lens array shown in fig. 5 d. The macro sequence diagram can be matched with the micro cylindrical lens and the corresponding micro circular lens array, and fig. 7 is a schematic diagram of the corresponding relationship between the merged macro sequence diagram and the micro circular lens array shown in fig. 5 d.
As shown in fig. 8, the micro image-text array is suitable for a micro round lens array, and the micro image-text array is formed by arraying micro image-texts according to a certain arrangement period. The micro-image-text array and the micro-circular lens array have the same arrangement and the similar arrangement period, for example, in fig. 8a, the arrangement of the micro-circular lens array is regular hexagonal, in fig. 8b, the arrangement of the micro-circular lens array is square, and correspondingly, the micro-image-text array also needs the same arrangement. By selecting the different arrangement period size relationship of the two, the effects of floating, sinking, orthogonal shaking and the like can be realized.
According to different requirements, the various image-text structures can be freely combined, for example, the image-text structure 3 can be a macro sequence diagram with a plane surface and an outward convex structure, or a micro image-text array with a grating structure and an inward concave structure on the surface.
The material of the plating layer 4 includes, but is not limited to, any one of gold, silver, copper, aluminum, and nickel, and any other material that can be used for surface plating and can enhance the image display effect can be used. The part outside the image-text structure 3 is not provided with the plating layer 4 which is transparent, so the back of the substrate layer 2 can be directly printed or compounded with other patterns, the local variable three-dimensional bright patterns are added while the original pattern expression is not influenced, and the expression and the aesthetic degree of the printed matter can be greatly enhanced.
Fig. 9 illustrates a method for manufacturing a local bright light variable image optical system, which can be used for manufacturing the local bright light variable image optical system illustrated in fig. 1, and the method includes the following steps:
step S11: manufacturing a micro-lens array layer on one side of a substrate;
step S12: making an image-text structure on the other side of the substrate;
step S13: forming a plating layer on one side of the substrate with the graphic and text structure;
step S14: removing the plating layer outside the surface of the image-text structure;
step S15: and (5) cleaning and airing the product obtained in the step S14 to obtain a final product.
In this embodiment, as shown in fig. 10, step S12 may include:
step S121: designing a photoetching file corresponding to the image-text structure according to the required image-text structure;
step S122: manufacturing a rubber plate corresponding to the image-text structure according to the photoetching file by using a photoetching machine;
step S123: manufacturing the rubber plate in the step S122 into a metal mold pressing plate by using an electrochemical deposition process;
step S124: and manufacturing a graph-text structure on the other side of the substrate by using a metal mold pressing plate.
In this embodiment, the step S14 of removing the plating layer outside the surface of the graphic structure may be performed by electrolysis. In this embodiment, the patterns have been structured, that is, all the patterns are convex or concave. As shown in FIG. 11, the pattern structure is an island-type convex structure, after the surface is plated, the plating layer 81 on the pattern structure is discontinuous and independent, and the plating layer 82 outside the structure is continuous, so that the plating layer 81 on the surface of the pattern structure can be remained by removing the continuous conductive plating layer 82 through electrolysis.
In the following, the following examples are given in conjunction with the above to illustrate the local-bright variable-image optical system of the present embodiment and the method of manufacturing the same:
example 1
As shown in fig. 12 to 13, the local bright light variable image optical system includes the micro cylindrical lens array 1 shown in fig. 2, the cylindrical lens aperture D is 50 micrometers, the array period T is 54 micrometers, and the spherical cap height H is 20 micrometers. The material of the base material layer 2 is PET, and the thickness is 60 microns. The graph-text structure 3 is a macro sequence diagram and is formed by combining 3 sequence diagrams with A, B, C, the graph-text structure 31 is a graph sequence diagram A, the graph-text structure 32 is a graph sequence diagram B, and the graph-text structure 33 is a graph sequence diagram C. The image-text structure of the sequence chart is convex, the height is 2um, and the width is 10 um. The surface of the image-text structure 32 has a grating structure with a grating line number of 700l/mm, and the surfaces of the image-text structures 31, 33 are planar. The plating layer 4 is an aluminum layer with the thickness of 300-500 angstroms and only covers the convex surface of the image-text structure 3. The morphing effect of this example is that the bright silver ABC patterns appear in sequence when viewed from different perspectives, with the B pattern appearing as a dazzling laser effect when it appears. This example, when viewed from different perspectives in combination with other printed patterns, can result in a bright silver ABC variation on the pattern locally, without affecting the effect of the printed pattern elsewhere.
The method of making the exemplary system includes the steps of:
step one, manufacturing a micro-cylindrical lens array on one side of a PET film with the thickness of 60 microns by an ultraviolet mould pressing method.
And step two, designing a sequence diagram of the ABC graph. The size of the sequence diagram under each single lens is selected to be 10 microns wide and 3 microns apart according to the arrangement period of the micro-cylindrical lens array and the number of the variation diagrams. And decomposing the ABC graphs in sequence according to the set parameters, combining the ABC graphs together to form a final macroscopic sequence diagram, and processing the macroscopic sequence diagram into a gray sequence diagram through drawing software.
And step three, manufacturing a molded plate with a sequence diagram structure. And converting the gray sequence diagram manufactured in the step two into a corresponding photoetching file, and etching the set image-text structure on a photoetching offset plate with the thickness of 2.5 microns by using a laser direct writing photoetching machine. And then the photoetching offset plate is manufactured into a metal stamping plate by using an electrochemical deposition method. Specifically, the photoetching offset plate with the image-text structure can be manufactured into a metal nickel mould pressing plate by a nickel electroforming process.
And step four, manufacturing an ABC sequence diagram structure on the other side of the PET substrate by using the mould pressing plate manufactured in the step three through an ultraviolet mould pressing method, wherein the vertical orientation of the cylindrical lens and the vertical orientation of the sequence diagram are required to be ensured to be parallel in the manufacturing process, and the micro image-text structure corresponds to the cylindrical lens. And after the manufacture is finished, carrying out vacuum aluminizing on the image-text structure side.
And fifthly, removing the aluminum layer outside the image-text structure. Fig. 10 is a schematic diagram after aluminum plating, and the structure of the sequence diagram is an island structure, the height is 2um, which is much larger than the thickness of the aluminum plating layer, so the aluminum layer 81 on the surface of the graph-text structure and the aluminum layer 82 on the surface of the substrate are disconnected and not conducted. The aluminum layer is removed by electrolytic dissolution from the anode of an electrolytic cell containing an acidic potassium chloride solution as a main component of the aluminum-plated product. Because the aluminum layer on the surface of the graph-text structure can not be dissolved without current, the aluminum layer on the surface of the base material can be dissolved under the action of the current. This achieves the aluminum plating on the structure of the sequence diagram, but not outside the structure.
And step six, cleaning and airing the electrolyzed product to finish the manufacture of the final product.
Example 2
As shown in fig. 14 to 16, the local light variable image optical system includes the micro-circular lens array 1 shown in fig. 3, the circular lens aperture D is 50 micrometers, wherein the micro-circular lens array is arranged in a square manner, the lateral array period T1 is 54 micrometers, the longitudinal array period T2 is also 54 micrometers, and the spherical cap height H is 20 micrometers. The base material layer 2 material is BOPP membrane, and thickness is 60 microns. The graph-text structure 3 is a macro sequence diagram and is formed by combining 3 sequence diagrams with A, B, C, the graph-text structure 31 is a graph sequence diagram A, the graph-text structure 32 is a graph sequence diagram B, and the graph-text structure 33 is a graph sequence diagram C. The graph-text structure of the sequence chart is concave, the depth is 3um, and the width is 10 um. The surface of the image-text structure 32 has a grating structure with a grating line number of 900l/mm, and the surfaces of the image-text structures 31, 33 are planar. The plating layer 4 is an aluminum layer with a thickness of 300-500 angstroms and only covers the concave surface of the graphic structure 3. The morphing effect of this example is that the ABC patterns of bright silver appear in sequence when viewed from different perspectives, with pattern B being the laser effect. This example, when viewed from different perspectives in combination with other printed patterns, can result in a bright silver ABC variation on the pattern locally, without affecting the effect of the printed pattern elsewhere.
The method of making the exemplary system includes the steps of:
step one, manufacturing a micro-circular lens array on one side of a BOPP film (biaxially oriented polypropylene film) with the thickness of 60 microns by an ultraviolet mould pressing method.
And step two, designing a sequence diagram of the ABC graph. The dimensions of the sequence of images under each individual lens were chosen to be 10 microns wide and 3 microns apart, depending on the period of the array of micro-circular lenses and the number of variations. And decomposing the ABC graphs in sequence according to the set parameters, combining the ABC graphs together to form a final sequence diagram, and processing the sequence diagram into a gray sequence diagram through drawing software.
And step three, manufacturing a molded plate with a sequence diagram structure. And converting the gray sequence diagram manufactured in the step two into a corresponding photoetching file, and etching the set image-text structure on a photoetching offset plate with the thickness of 4 microns by using a laser direct writing photoetching machine. And then the photoetching offset plate is manufactured into a metal stamping plate by using an electrochemical deposition method. Specifically, the photoetching offset plate with the image-text structure can be manufactured into a metal nickel mould pressing plate by a nickel electroforming process.
And step four, manufacturing an ABC sequence diagram structure on the other side of the BOPP substrate by using the mould pressing plate manufactured in the step three through an ultraviolet mould pressing method, and performing vacuum aluminizing on the image-text structure side.
And fifthly, removing the aluminum layer outside the image-text structure. And putting the aluminized product into an acid solution of potassium chloride, and removing the aluminum layer by an electrolytic dissolution method. The sequence diagram structure is an inwards concave structure, the height of the inwards concave structure is 3um and is far larger than the height of the aluminum plating layer, and the aluminum layer on the surface of the graph-text structure is disconnected with the aluminum layer on the surface of the base material and is not conductive. Therefore, the aluminum layer on the surface of the graph-text structure cannot be dissolved, and the aluminum layer on the surface of the substrate is dissolved due to the action of the current.
And step six, cleaning and airing the electrolyzed product to finish the manufacture of the final product.
Example 3
As shown in fig. 17 and 18, the local light variable image optical system includes the micro-circular lens array 1 shown in fig. 3, the circular lens aperture D is 50 micrometers, wherein the micro-circular lens array is arranged in a square manner, the lateral array period T1 is 54 micrometers, the longitudinal array period T2 is also 54 micrometers, and the spherical cap height H is 20 micrometers. The base material layer 2 material is BOPP membrane, and thickness is 60 microns. The teletext structure 3 is a teletext array formed by a square array of teletext ABC letters, with a transverse array period T3 of 53.46 microns and a longitudinal array period T4 of 53.46 microns. The graphic structure of the micro graphic array is concave, the depth is 2 microns, and the width of the mural of the letter is 2 microns. The surface of the graph-text structure is a plane. The plating layer 4 is an aluminum layer with a thickness of 300-500 angstroms and only covers the concave surface of the graphic structure 3. The cubic effect of this example is that the array ABC letter pattern, which is always seen as bright silver when viewed from different perspectives, sinks to about 6mm below the surface of the film layer. This example, when viewed from different perspectives in combination with other printed patterns, would have a solid, bright silver array ABC pattern locally appearing on the pattern, and not affecting the effect of the printed pattern elsewhere.
The method of making the exemplary system includes the steps of:
step one, manufacturing a micro-circular lens array on one side of a PET film with the thickness of 60 microns by an ultraviolet mould pressing method.
And step two, designing an array diagram of ABC letters. And (3) manufacturing a corresponding array diagram according to the arrangement mode and the arrangement period of the micro image-text array, and processing the array diagram into a gray level diagram through drawing software.
And step three, manufacturing a molded plate with a sequence diagram structure. And D, converting the gray level image manufactured in the step two into a corresponding photoetching file, and etching the set image-text structure on a photoetching offset plate with the thickness of 2.5 micrometers by using a laser direct writing photoetching machine. And then the photoetching offset plate is manufactured into a metal stamping plate by using an electrochemical deposition method. Specifically, the photoetching offset plate with the image-text structure can be manufactured into a metal nickel mould pressing plate by a nickel electroforming process.
And step four, manufacturing an ABC array structure on the other side of the PET substrate by using the mould pressing plate manufactured in the step three through an ultraviolet mould pressing method, and performing vacuum aluminizing on the image-text structure side.
And fifthly, removing the aluminum layer outside the image-text structure. And putting the aluminized product into an acid solution of potassium chloride, and removing the aluminum layer by an electrolytic dissolution method. The micro image-text array structure is of an inwards concave structure, the height of the micro image-text array structure is 3 microns and is far larger than the height of the aluminum coating, and the aluminum coating on the surface of the image-text structure is disconnected with the aluminum coating on the surface of the substrate and is not conductive. Therefore, the aluminum layer on the surface of the graph-text structure cannot be dissolved, and the aluminum layer on the surface of the substrate is dissolved due to the action of the current.
And step six, cleaning and airing the electrolyzed product to finish the manufacture of the final product.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
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| CB02 | Change of applicant information |
Country or region after: China Address after: 201612 Room 101, building 1, No. 118, Xinzhuan Road, Songjiang District, Shanghai Applicant after: Shanghai Tianchen micro nano technology Co.,Ltd. Address before: 201614 No. 509, Guanghua Road, Songjiang District, Shanghai Applicant before: SHANGHAI TECHSUN ANTI-COUNTERFEITING TECHNOLOGY HOLDING Co.,Ltd. Country or region before: China |