WO2017005204A1 - Film optique - Google Patents

Film optique Download PDF

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Publication number
WO2017005204A1
WO2017005204A1 PCT/CN2016/089080 CN2016089080W WO2017005204A1 WO 2017005204 A1 WO2017005204 A1 WO 2017005204A1 CN 2016089080 W CN2016089080 W CN 2016089080W WO 2017005204 A1 WO2017005204 A1 WO 2017005204A1
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WO
WIPO (PCT)
Prior art keywords
micro
unit
optical film
layer
film according
Prior art date
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Ceased
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PCT/CN2016/089080
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English (en)
Chinese (zh)
Inventor
张健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shine Optoelectronics Kunshan Co Ltd
Original Assignee
Shine Optoelectronics Kunshan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510397870.1A external-priority patent/CN106324846B/zh
Priority claimed from CN201520487868.9U external-priority patent/CN205608222U/zh
Priority claimed from CN201520488516.5U external-priority patent/CN205280964U/zh
Priority claimed from CN201510397444.8A external-priority patent/CN106324726B/zh
Priority claimed from CN201520827379.3U external-priority patent/CN205374782U/zh
Application filed by Shine Optoelectronics Kunshan Co Ltd filed Critical Shine Optoelectronics Kunshan Co Ltd
Publication of WO2017005204A1 publication Critical patent/WO2017005204A1/fr
Priority to US15/865,241 priority Critical patent/US11143794B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses

Definitions

  • the present application relates to the field of optical thin film technology, and in particular to an optical film.
  • microlens technology to achieve three-dimensional imaging has great potential and prospects. It was developed from the integrated photography proposed by G. Lippman in 1908. A set of two-dimensional unit images with different perspective relationships of three-dimensional scenes are recorded by a lens array and image acquisition, and a three-dimensional image of the original scene can be directly observed in front of the display microlens array without special observation glasses and illumination.
  • integrated imaging technology has attracted more and more attention, integrating the performance of imaging and display technologies, such as depth of field, viewing angle and resolution. , also got a big improvement.
  • the front or rear surface of the array is collected by the microlens array on the laser recording material under the microlens array, and the relative position between the focus point of the laser beam and the microlens array is changed to form a pattern, thereby finally forming a three-dimensional dynamic space imaging.
  • the sample is viewed from the side of the microlens array. This method requires microlens imaging to ablate the substrate material, so the resolution is low.
  • the second type is based on the Moiré imaging technique, which utilizes the focusing action of the microlens array to efficiently magnify the micropattern to realize a pattern having a certain depth of field and exhibiting a strange dynamic effect.
  • 201080035671.1 discloses A microlens array security element applied to a security window for securing a security such as a banknote, the basic structure of which is: providing a periodic microlens array on the upper surface of the transparent substrate, and setting a corresponding periodic micro on the lower surface of the transparent substrate a pattern array, the micropattern array is located at or near a focal plane of the microlens array, the micropattern array is arranged substantially the same as the microlens array, and the moiré magnification of the micropattern array is imaged by the microlens array; the optical imaging consisting of the transmission focusing unit The thickness of the film is generally greater than three times the radius of curvature of the microlens.
  • the banknote security thread thickness must be less than 50 microns, so the diameter of the microlens unit must also be less than 50 microns.
  • the smaller microlens unit limits the size of the micropattern and limits the design space of the micropattern.
  • the Chinese patent documents CN104118236A, CN201310229569.0, CN201410327932.7 propose a micro-reflective focusing element array optical security element and a value item. They employ an array of periodic micro-reflective focusing elements that reduce the thickness of the film below the radius of curvature of the micro-reflective focusing element, while still obtaining a periodic enlarged image structure. When the image forming film is tilted left and right or back and forth, other images of the enlarged image structure enter the viewing area.
  • Chinese patent document ZL201010180251.4 proposes an optical security element and a product using the same.
  • the image forming film in the prior art mainly comprises a substrate layer 10, a microlens layer 11, and an outwardly convex pattern layer 12, as shown in FIG.
  • the microlens layer 11 and the pattern layer 12 are respectively located on the upper surface and the lower surface of the substrate layer 10.
  • the preparation process of the imaging film mainly comprises the following steps:
  • a transparent high molecular polymer material for example, polyethylene terephthalate, abbreviated as PET
  • a convex ink pattern is provided on the lower surface of the base material layer to form a pattern layer.
  • the overall thickness of the image forming film prepared by the above preparation method may be several hundred micrometers or more.
  • the overall thickness of such an imaged film is generally relatively large, which may cause the imaged film to be difficult to cut off during hot stamping.
  • the microlens array and the micropattern array in the imaging film in the prior art are periodically arranged, so that a plurality of images can be presented, and in many cases, it is desired to obtain a stereoscopic suspension effect for various application scenarios.
  • the weather resistance of the device is very necessary.
  • the present application discloses an optical film comprising: a first polymer having a first surface and a second polymer having a second surface, the first surface and the second surface being opposite each other;
  • the first surface is formed with a microlens structure, the microlens structure comprising a plurality of microfocus units;
  • the second surface is formed with a receiving structure that houses a plurality of graphic structures imaged by the microlens structure
  • An adjacent portion between the first polymer and the second polymer is formed with a fusion portion to make the microlens structure and the receiving structure integral;
  • the microfocus unit is adapted to the graphic structure such that the optical film can be suspended at least one of the optical films when viewed from a side of the graphic structure or from a side of the microfocus unit Suspended image.
  • the present application discloses an optical film comprising: a polymer comprising a first surface and a second surface opposite to each other;
  • the first surface is formed with a microlens structure, the microlens structure comprising a plurality of microfocus units;
  • the second surface is formed with a receiving structure that houses a plurality of graphic structures imaged by the microlens structure
  • microlens structure and the receiving structure are integrated;
  • the microfocus unit is adapted to the graphic structure such that the optical film can be suspended at least one of the optical films when viewed from a side of the graphic structure or from a side of the microfocus unit Suspended image.
  • the focal length of the microfocus unit is shorter.
  • the film thickness can be reduced to one-sixth of the transmissive type. Therefore, a microfocus unit with a larger aperture can be used, which not only effectively reduces the film thickness, but also has a large process tolerance and overcomes The design limitations of transmissive devices make it possible to apply complex microstructure patterns to moiré amplifying devices.
  • the optical film needs to be absolutely aligned with the microfocus unit and the microtext layer on the first surface and the second surface of the polymer, thereby having stricter error requirements on the alignment process and the like, and copying
  • the cost and technical difficulty are greatly increased, so that the film also has a certain optical anti-counterfeiting function.
  • the safety element using the reflective random Moire magnified image the effect is not affected by the ambient light, the surface is smooth and flat, can withstand the pollution of sweat, oil and the like, and can be coated on both sides of the adhesive, which is not easy Shedding, adaptability and weather resistance are better.
  • the microfocus unit may be a mirror such as a lens, thereby having better light collecting ability and stereoscopic feeling.
  • the optical film eliminates the substrate layer, so that the optical film reduces the thickness of the optical film and has good mechanical properties, which makes the optical film easy to cut during hot stamping.
  • the present application discloses a three-dimensional suspension imaging optical film, comprising:
  • microfocus unit array layer disposed on one surface of the transparent spacer layer, the microfocus unit array layer comprising a plurality of microfocus units arranged in an asymmetrical manner;
  • micro graphic element array layer disposed on the other surface of the transparent spacer layer opposite to the micro focusing unit array layer, the micro graphic element array layer comprising a plurality of micro graphic unit;
  • the micro-focusing unit array layer is adapted to the micro-textographic element array layer such that the three-dimensional floating imaging optical film is viewed from a side of the micro-image unit or from a side of the micro-focusing unit And only a floating image suspended in the transparent spacer layer can be formed.
  • micro-optical imaging film comprising:
  • a transparent spacer layer having a first surface and a second surface disposed opposite to each other;
  • micro-transmissive focusing unit array layer a micro-transmissive focusing unit array layer, the micro-transmissive focusing unit array layer being disposed on a first surface of the transparent spacer layer, the micro-transmissive focusing unit array layer comprising at least two micro-transmissive focusing units in an asymmetric arrangement;
  • the graphic variable layer is disposed on a second surface of the transparent spacer layer, the graphic variable layer includes at least two micro graphic units, and the micro graphic unit includes a connection a dot matrix that is turned on and/or off;
  • the micro-textographic unit is associated with the micro-transmission focusing unit such that the micro-optical imaging film is remote from the micro-textographic unit in the micro-transmission focusing unit through all lattices in an on state There is one and only one suspended image on the side.
  • the micro-transmission unit in the variable layer of the graphic is set to include at least two in an on or off state by setting the micro-transmission focusing unit in the micro-transmission focusing unit array layer to be asymmetrically arranged.
  • a dot matrix and the micro-transmission focusing unit is associated with the micro-image unit to form a unique suspended image of the variable layer of the graphic in the observation area, instead of the plurality of enlarged micro-image images of the conventional periodic arrangement, and By turning on different lattices, different images can be formed, which achieves the purpose of providing an imaging film with a unique suspended image for different application scenarios.
  • the present application discloses a micro-optical imaging system comprising: a micro-optical imaging film and a control device;
  • the micro-optical imaging film comprises:
  • a transparent spacer unit having a first surface and a second surface disposed opposite to each other;
  • At least two micro-transmissive focusing units arranged asymmetrically, the micro-transmissive focusing unit being disposed on the first surface of the transparent spacing unit;
  • micro-text unit being disposed on a second surface of the transparent spacer unit, the micro-text unit including a dot matrix having an on and/or off state;
  • micro-optical imaging film Forming, by the micro-optical imaging film, one and only one floating image on a side of the micro-transmission focusing unit remote from the micro-texture unit through all lattices in an on state;
  • the control device is for controlling the on, off and/or display brightness of the dot matrix.
  • Embodiments of the present application set the micro-image unit to include a lattice in an on or off state by setting the micro-transmission focusing unit in the micro-optical imaging film to an asymmetric arrangement, and the position coordinates of the micro-text unit It can be obtained by preset transformation of the position coordinates of the micro-transmission focusing unit, forming a unique floating image in the observation area instead of the conventional periodic micro-images, and turning on different lattices. Different images can be formed, which achieves the purpose of providing an imaging film with a unique floating image for various application scenarios.
  • Figure 1 is a schematic view showing the structure of an image forming film in the prior art.
  • FIG. 2 is a schematic structural view of an optical film without forming a graphic structure according to an embodiment of the present application
  • FIG. 3 is a schematic structural view of an optical film forming a graphic structure according to an embodiment of the present application.
  • FIG. 4 is a schematic structural view of another optical film provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural view of another optical film according to an embodiment of the present application.
  • FIG. 6 is a schematic structural view of another optical film without forming a graphic structure according to an embodiment of the present application.
  • FIG. 7 is a schematic structural view of another optical film forming a graphic structure provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural view of another optical film (with a reflective structure) without forming a graphic structure according to an embodiment of the present application.
  • FIG. 9 is a schematic structural view of another optical film (having a reflective structure) for forming a graphic structure according to an embodiment of the present application.
  • FIG. 10 is a schematic structural view of another optical film (with a reflective structure) without forming a graphic structure according to an embodiment of the present application.
  • FIG. 11 is a schematic structural view of another optical film (with a reflective structure) for forming a graphic structure according to an embodiment of the present application.
  • FIG. 12 is a flow chart of a method for preparing an optical film according to an embodiment of the present application.
  • FIG. 13a is a schematic structural view of a microfocus unit in a suspension imaging optical film according to the present application.
  • 13b is another schematic structural view of a microfocus unit in a suspension imaging optical film according to the present application.
  • FIG. 14a is a schematic structural diagram of a structure corresponding to the microfocus unit of FIG. 13a according to the present application;
  • FIG. 14b is a schematic structural diagram of another graphic structure corresponding to the micro focus unit of FIG. 13b according to the present application.
  • FIG. 15 is a schematic structural view showing the visual effect of a suspension imaging optical film according to the present application.
  • FIG. 16 is a schematic view showing the structure of a suspension imaging optical film according to the present application.
  • 17a is a schematic structural view of a three-dimensional suspension imaging optical film of the present application.
  • 17b is another schematic structural view of a three-dimensional suspension imaging optical film of the present application.
  • 17c is a schematic view showing still another structure of a three-dimensional suspension imaging optical film of the present application.
  • 18a is a schematic structural view of a micro-optical imaging film of the present application.
  • 18b is another schematic structural view of a micro-optical imaging film of the present application.
  • 18c is another schematic structural view of a micro-optical imaging film of the present application.
  • FIG. 19 is a schematic view showing the structure of a visual effect of a micro-optical imaging film according to the present application.
  • FIG. 20 is a schematic structural diagram of a micro-optical imaging film according to the present application.
  • 21 is a schematic view showing the structure of an imaging effect of a micro-optical imaging film according to the present application.
  • the embodiment of the present application provides an optical film 20, which may include a first surface (upper surface in the figure) and a second surface (lower surface in the figure) disposed opposite to each other.
  • a polymer A microlens structure 201 is formed on the first surface; a receiving structure 202 is formed on the second surface, and the receiving structure 202 houses a graphic structure 203 imaged by the microlens structure 201.
  • the polymer of the optical film may be a single polymer or a mixed polymer composed of a plurality of individual polymers which do not react.
  • the polymer may have a light transmission greater than 70%, i.e., the polymer is a clear color or visually transparent.
  • the polymer may be a thermosetting resin and/or a photocurable resin such as a UV glue.
  • the microlens structure 201 and the receiving structure 202 may be respectively located on the first surface and the second surface opposite to each other in a polymer layer composed of the polymer, and the polymer in the polymer layer may be uniformly distributed. It may also be unevenly distributed (herein referred to as the density distribution in the polymeric layer).
  • microlens structure 201 and the receiving structure 202 are formed on the same polymer layer, there is no interface between the microlens structure 201 and the receiving structure 202, that is, the microlens structure 201 and the receiving structure 202 are integrated.
  • the microlens structure 201 may contain a microlens array, which may contain one or more microlenses. There may be no gap between the plurality of microlenses in order to reduce the overall volume of the polymer film. There may also be a gap between the plurality of microlenses (refer to FIG. 4), so that the integrity of the cut microlens can be ensured when the polymer film is cut, so that the subsequent imaging effect of the microlens can be ensured.
  • the microlens structure 201 can also include a number of microfocus units in an asymmetrical arrangement.
  • the microfocus unit is arranged asymmetrically on the first surface of the polymer to form a microfocus unit 11.
  • the asymmetry appearing herein means that the planes of the plurality of microfocus units on the first surface of the polymer do not have a mirror symmetry axis or a central symmetry axis or the like, thereby causing a plurality of microfocus units. Not in mirror symmetry or center symmetric arrangement.
  • the containment structure 202 can contain one or more trenches or can contain one or more micro-grooves (ie, micron-sized trenches).
  • the (micro) trench is used to fill the filler to form the graphic structure 203.
  • the graphic structure 203 contains a pattern formed after the filling is filled.
  • the filler may be a material having a refractive index difference from the polymer to light, including a coloring material, a dyeing material, a metal material, or a conductive material, such as an ink. It should be noted that the color of the filler may be different from the color of the polymer, so that people can clearly distinguish the pattern in the graphic structure when observing the image structure.
  • the graphic structure includes one or a combination of micro-printed patterns, filled pigments, surface micro-embossed micro-patterns of dyes, micro-patterns of line structures, and printed patterns.
  • the receiving structure 202 (or the graphic structure 203) can be matched with the microlens structure 201, and specifically can include the receiving structure 202 (or the graphic structure 203) matching the position of the microlens structure 201, such as in the graphic structure 202.
  • the micropattern is disposed opposite the microlens in the microlens structure 201 to increase the utilization of the polymer material.
  • the receiving structure 202 (or the graphic structure 203) and the microlens structure 201 may also be arranged to include a microlens in the microlens structure 201 and a microgroove in the receiving structure (or a micropattern in the graphic structure 203). In a corresponding arrangement, it is advantageous to ensure that at least one complete microlens and micro-grooves (or micro-patterns) are included in each of the image forming film units cut when cutting the image forming film.
  • the graphic structure 203 can be located near the focal plane of the microlens structure 201, which can be imaged by the microlens structure 201, and a magnified image of the graphic structure 203 can be observed on the side of the microlens structure 201 opposite to the graphic structure 203. .
  • each of the micropatterns in the graphic structure 203 is located near a corresponding focal plane in the microlens structure 201, and each micropattern can be imaged by a corresponding microfocus unit, in each microfocus unit.
  • a magnified image of the corresponding micropattern can be observed on one side.
  • the focal plane may represent the focus of the microfocus unit (including the front or back focus) and perpendicular to the plane of the main optical axis of the microlens array.
  • the distance between the top of the microlens structure 201 and the top of the containment structure 202 (or the graphic structure 203) may be from 2 to 150 microns.
  • the graphic structure 503 is embedded in the microlens structure 201, as shown in FIG. Show. It can be seen from FIG. 5 that the graphic structure 503 is embedded in the microlens structure 501. The smaller the distance between the microlens structure and the graphic structure, the thinner the thickness of the optical film, which not only saves cost but is easier to cut during hot stamping.
  • the microfocus unit is adapted to the graphic structure 203 such that the optical film is capable of forming a suspension suspended in the optical film when viewed from the side of the microfocus unit. image.
  • the image or the enlarged image has one and only one, and the enlarged image is a single channel pattern or a multi-channel pattern.
  • “there is only one” is not an icon or graphic, such as a multi-channel pattern.
  • the image must have an original image unit. It can be understood that the original image unit forms an image through the action of an optical device.
  • the original image unit here is a complete graphic or a graphic that can express a complete meaning, so the "one and only one” here is defined according to the original image unit, and the resulting image is only one original image unit. That is, there is “there is only one” and the number of images cannot be judged according to the connected domain.
  • the positional coordinates adapted to the teletext structure 203 in the second surface may be obtained by transforming the position coordinates of the corresponding micro-focusing unit in the first surface, the transformation comprising coordinate scaling transformation or coordinate rotation transformation, Or a combination of them.
  • Figure 13a is a random arrangement
  • Figure 13b is a square lattice according to a function
  • the microfocus reflection array is located
  • the ratio of area to total area is called the duty cycle.
  • the duty cycle the higher the duty cycle, the higher the contrast of the resulting magnified image.
  • the total area occupied by the microfocus unit is more than 60% of the total area of the first surface in which it is located.
  • FIG. 14a is a magnified transformation of the lattice coordinates randomly arranged in FIG. 13a.
  • the arrangement of the graphic structure obtained by rotating the lattice coordinates of the micro-focusing unit by 2° (which may also be other values), wherein x oj and y oj are the coordinates of the position of the micro-focusing unit, and the graphic structure is located therein.
  • the second surface of the polymer is arranged without a symmetry axis and is aperiodic.
  • the transformation fixed point of the transformation function there is one and only one transformation fixed point of the transformation function, which ensures that only a single enlarged image structure image is presented. That is, in the scaling and rotation transformation described above, there is one and only one pair of transformed fixed points on the first surface and the second surface of the polymer (the first surface coordinate value obtained based on the fixed point and the second obtained based on the fixed point) Surface coordinate values), point 211-point 215 (as in Figures 13a and 14a), point 213-point 217 (as in Figures 13b and 14b).
  • the coordinate transformations used include, but are not limited to, coordinate scaling transformations and coordinate rotation transformations, or a combination thereof.
  • the microfocus unit has a first positioning point corresponding to a fixed point of the function in a plane thereof, and the plane where the graphic structure is located has a second corresponding to the first positioning point based on the fixed point And a positioning point, the graphic structure is in one-to-one correspondence with the micro focusing unit based on the first positioning point and the second positioning point.
  • the transformation function of the position coordinates of the graphic structure and the position coordinates of the microfocus unit may also be other functions having one and only one fixed point.
  • the microfocus unit is asymmetrically arranged on the surface of the polymer, it is ensured that the position coordinates of the graphic structure are in a one-to-one correspondence with the position coordinates of the microfocus unit, thereby ensuring that the suspended imaging optical film can only be presented.
  • One pattern, and the pattern does not appear multiple. Although the pattern produces a certain deflection and size change during the rotation of the film, the sharpness of the pattern is still ensured since no overlap or other pattern is produced.
  • the distance of the teletext structure from the focal plane of the microfocus unit is less than or equal to 20% of the focal length of the focus microfocus unit.
  • the total thickness of the optical film is between one-half of the radius of curvature of the microfocus unit and three times the radius of curvature of the microfocus unit.
  • the effective diameter of the microfocus unit is greater than 20 micrometers and less than 1000 micrometers, or the effective diameter is 20 ⁇ m to 500 ⁇ m, or the effective diameter is 55 ⁇ m to 200 ⁇ m, or 300 ⁇ m to 450 ⁇ m.
  • the effective diameter is 550 ⁇ m ⁇ 900 ⁇ m.
  • the focal length of the microfocus unit is 10 micrometers to 2000 micrometers, or the focal length is 20 ⁇ m to 100 ⁇ m, or the focal length is 200 ⁇ m to 450 ⁇ m, or the focal length is 550 ⁇ m to 900 ⁇ m, or the focal length. It is from 1050 ⁇ m to 1500 ⁇ m.
  • the total thickness of the 3D imaging optical film is less than 5000 micrometers, for example, the film may be a substrate-free or thin substrate due to a relatively high-end or ultra-thin design.
  • the total thickness of the 3D imaging optical film is 20 ⁇ m to 200 ⁇ m, and is used for a product having a relatively small volume and has a low thickness requirement.
  • the total thickness of the 3D imaging optical film is 300 ⁇ m to 500 ⁇ m, and the 3D imaging optical film is at this time.
  • the total thickness is from 600 ⁇ m to 1000 ⁇ m, even thicker such as 1200 ⁇ m, 1300 ⁇ m, 1500 ⁇ m, 2000 ⁇ m, 2500 ⁇ m, 3500 ⁇ m or 4500 ⁇ m.
  • the optical film provided by the embodiment of the present application may be a thin film structure, and the microlens structure and the receiving structure are formed in the same polymer layer (ie, integrated structure), and there is no substrate layer.
  • the purpose of reducing the thickness of the optical film is achieved.
  • the optical film has no substrate layer, and therefore has good mechanical properties, which makes the optical film easy to cut at the time of hot stamping.
  • the optical film in the embodiment of the present application has a thin thickness, a thickness of several tens of micrometers or less, or even several micrometers, and is easy to cut, so that the optical film is easily transferred.
  • the surface of the graphic structure may be provided with a protective structure.
  • the protection pair structure is used to protect the graphic structure to prevent deformation of the (micro) pattern in the graphic structure and affect the imaging effect.
  • the protective structure may include UV glue, OCA glue, and other transparent or visually clear polymers that do not chemically react.
  • the optical film provided by the embodiment of the present application may be a thin film structure, a microlens structure and a capacity.
  • the nanostructure is formed in the same polymer layer (i.e., in a unitary structure) and has no substrate layer, which achieves the purpose of reducing the thickness of the optical film. Further, the optical film has no substrate layer, and therefore has good mechanical properties, which makes the optical film easy to cut at the time of hot stamping.
  • the optical film in the embodiment of the present application has a thin thickness, a thickness of several tens of micrometers or less, or even several micrometers, and is easy to cut, so that the optical film is easily transferred.
  • the optical film 60 may include a first polymer having a first surface and a second polymer having a second surface, the first surface and the second surface being opposite to each other; the first surface being formed with a microlens structure 601; the second surface is formed with a receiving structure 602 for forming a graphic structure 603 imaged by the microlens structure 601.
  • Both the first polymer and the second polymer may be a single polymer, and may also be a mixed polymer composed of a plurality of individual polymers that do not react.
  • the light transmittance of the first polymer and the second polymer may each be greater than 70%, that is, the first polymer and the second polymer are transparent colors or visually transparent.
  • Both the first polymer and the second polymer may be a resin material including a thermosetting resin and/or a photocurable resin such as UV glue.
  • the difference in refractive index between the first polymer and the second polymer may be less than 0.5 to ensure that the effect of observing an image in the imaged film is not affected.
  • An adjacent portion between the first polymer and the second polymer is formed with a fusion portion.
  • the adjacent portion may be the first polymer and the second polymer when the first polymer and the second polymer are extruded by a mold to form a microlens preliminary structure and a preliminary structure is accommodated The contact area between.
  • the fusion portion may be a region in which the first polymer and the second polymer are fused in a predetermined ratio.
  • the preset ratio may be N:M, where N and M are the content of the first polymer and the second polymer at the intersection of the microlens structure 601 and the adjacent portion of the receiving structure 602, respectively, and the values may each be 0. ⁇ 100%, but does not include 0 and 100%.
  • the content of the first polymer in the microlens structure 601 is 100%; the content of the second polymer in the receiving structure 602 is 100%. Therefore, the microlens structure 601 and the receiving structure 202 can be regarded as a unitary structure, there is no interface between the microlens structure and the receiving structure, or there is no obvious layer-to-layer boundary line or the presented on the cross section of the optical film.
  • the dividing line is a well-defined dividing line.
  • the integral structure means that it can be integrated into an integrated structure or an integrated structure by other processing means such as curing.
  • An optical film 60 provided by an embodiment of the present application differs from the optical film 20 shown in FIG. 2 in that the optical film 60 is composed of two polymers, and the optical film 20 is composed of a polymer.
  • the optical film 60 is composed of two polymers, and the optical film 20 is composed of a polymer.
  • the embodiment of the present application further provides another optical film 80, which may include a polymer including a first surface and a second surface disposed opposite each other.
  • a microlens structure 801 is formed on the first surface; the microlens structure 801 includes a focusing portion and a reflective structure 804 disposed on a surface of the focusing portion; a receiving structure 802 is formed on the second surface, and the receiving structure 802 is used for A graphic structure 803 imaged by the microlens structure 801 is formed.
  • the reflective structure 804 can be a transparent material, an opaque material, or a translucent material.
  • the reflective structure 804 can have a thickness of 0.02 to 5 microns.
  • the reflective structure 804 can be a single dielectric layer, a multilayer dielectric layer, a metal reflective layer, or a multilayer structure composed of a metal reflective layer and a dielectric layer.
  • the microfocus unit includes a cylindrical mirror, a spherical mirror, or an aspheric mirror.
  • a reflective structure 804 is disposed on the surface of the microlens structure 801, which makes it possible to fit the side of the graphic structure of the optical film with the actual application product in practical applications, and observe the imaging of the graphic structure from the side of the graphic structure. Can avoid observing from the side of the microlens The imaging of the image structure and the effect of the user experience effect caused by the unevenness of the side of the microlens structure are beneficial to the user experience.
  • the optical film 100 may include a first polymer having a first surface and a second polymer having a second surface, the first surface and the second surface being opposite each other;
  • the first surface is formed with a microlens structure 1001;
  • the microlens structure 1001 includes a focusing portion and a reflective structure 1004 disposed on a surface of the focusing portion opposite to the receiving structure;
  • the second surface is formed with a receiving structure 1002 for forming A graphic structure 1003 imaged by the microlens structure 1001.
  • FIG. 15 a schematic diagram of the visual effect of an optical film in the present application.
  • the optical film as described in the first embodiment of the present application can enlarge the micro-text 44 originally hidden in the micro-pattern layer to be directly distinguishable by the naked eye.
  • the observer observes from the side of the second surface of the polymer and will see the only magnified microtext 45 suspended between the viewer and the second surface of the polymer.
  • the imaging film is rotated along the horizontal axis 41 or rotated along the vertical axis 42, no other image of the second enlarged image structure enters the viewing area.
  • the active microfocus unit 43 is located on the second surface of the polymer, it can be sealed using a protective material.
  • the first surface of the polymer is covered with a transparent substance such as water, the image forming effect of the 3D optical film of the present application will not be affected.
  • x MLA represents the coordinate value of the micro focus unit
  • x MPA represents the coordinate value of the graphic structure
  • the remaining portion of the first surface of the polymer or the remaining portion of the second surface of the polymer is provided with a holographic anti-counterfeiting unit, a Fresnel relief structure unit, a light-changing unit, a sub-wavelength micro
  • a holographic anti-counterfeiting unit e.g., a Fresnel relief structure unit
  • a light-changing unit e.g., a sub-wavelength micro
  • the structural unit, the dynamic photosensitive unit or the printed pattern, or the dielectric layer, the metal layer, or coated with ink, fluorescent, magnetic, phosphorous, selective absorption or having a micro/nano structure a holographic anti-counterfeiting unit, a Fresnel relief structure unit, a light-changing unit, a sub-wavelength micro
  • the embodiment of the present application also provides a method for preparing a polymer film, as shown in FIG.
  • the method includes:
  • the polymer may be a polymer or two polymers.
  • Each of the polymers may be a single polymer such as a curable resin or UV glue, or a mixed polymer of a plurality of polymers which do not react with each other.
  • the polymer can be obtained by methods in the prior art and will not be described here.
  • the first side of the polymer is extruded using a first mold having a microlens pattern to form a microlens preliminary structure, and a second mold pair having a preset containment structure pattern is used The second side of the polymer is extruded to form a preliminary structure.
  • the microlens preliminary structure and the receiving preliminary structure form an integral structure during extrusion.
  • the microlens structure can be a microlens array containing one or more microlenses.
  • the containment preliminary structure may contain one or more microchannels.
  • the first side of the polymer is extruded using a first mold having a microlens pattern to form a microlens preliminary structure
  • the second of the polymer is used using a second mold having a predetermined containment pattern pattern
  • Squeezing the side to form a preliminary structure may be performed by simultaneously pressing a first mold having a microlens pattern and a second mold having a predetermined receiving structure pattern to press the first side and the second side of the polymer to form a micro
  • the lens has a preliminary structure and accommodates the preliminary structure; it is also possible to first use a first mold having a microlens pattern, press the first side of the polymer to form a microlens preliminary structure, and then use it during the first predetermined time interval a second mold having a predetermined receiving structure pattern, the second side of the polymer is extruded to form a preliminary structure; or a second mold having a preset receiving structure pattern may be used first, the polymer The second side is extruded to receive the preliminary structure
  • the first mold and the second mold may be used to simultaneously press the first side and the second side of the one polymer, or may be in the first Squeezing the first side and the second side of the one polymer over a time interval to form a microlens preliminary structure and accommodating the preliminary structure;
  • the polymer is two polymers, such as the first polymer and a second polymer, wherein the first side of the first polymer is extruded by the first mold, or the second second mold is pressed by the second mold at the same time or during a first predetermined time interval On the side, adjacent portions between the first polymer and the second polymer are contacted to form a fusion portion during extrusion, and the microlens preliminary structure and the accommodation preliminary structure are formed.
  • the microlens preliminary structure and the accommodating preliminary structure may be cured to form a microlens structure and a receiving structure, respectively.
  • the curing the preliminary structure of the microlens and the accommodating preliminary structure may include simultaneously curing the microlens preliminary structure and the accommodating preliminary structure; or first, curing the preliminary structure of the microlens, And then curing the accommodating preliminary structure when the preliminary structure of the microlens is not completely cured; or first, curing the accommodating preliminary structure, and then when the accommodating preliminary structure is not completely cured, The preliminary structure of the microlens is cured.
  • Curing the microlens preliminary structure and the accommodating preliminary structure may be directly performing thermal curing or photocuring on the microlens preliminary structure and the accommodating preliminary structure; or may be through the first mold and/or Or the second mold uses an illumination source or a heat source to effect curing of the microlens preliminary structure and the receiving preliminary structure.
  • the polymer is a UV glue
  • the microlens preliminary structure and the containment preliminary structure are cured using ultraviolet light irradiation to form a microlens structure and a containment structure.
  • the adhesion of the first mold to the polymer is greater than the adhesion of the second mold to the polymer, so as not to cause the polymer to be separated when the second mold is separated. Separating from the first mold to avoid subsequent filling of the material in the trench structure The material has an impact.
  • the microlens structure and the accommodating structure in the preparation method of the polymer film provided by the embodiments of the present application can be molded at one time and simultaneously cured, and the substrate layer is not required to be prepared, thereby reducing the thickness of the polymer film.
  • the method is simple in process, saves materials, reduces costs, and is suitable for industrial production.
  • the method may further include:
  • the filling structure may be filled with a filler, and the filler may be subjected to curing measures such as drying or sintering to form a graphic structure.
  • the filler may be different from the refractive index of the polymer, and its color may also be different from the color of the polymer for ease of observation.
  • the preparation method may further include:
  • a reflective structure may be formed on the surface of the microlens structure by spraying, inkjet printing, suspension coating, evaporation, magnetron sputtering, electroplating, or the like.
  • the preparation method may further include:
  • the film unit may contain at least one complete microlens and one groove or pattern.
  • step S4 is not limited.
  • the pressing device may include first and second rollers that are parallel and have a predetermined separation distance; the first roller has an outer peripheral surface having the first mold, and the second roller has an outer peripheral surface Said second mold.
  • the first roller and the second roller may be placed relatively vertically or may be placed relatively horizontally.
  • the first roller and the second roller may be placed facing each other or may be placed diagonally opposite each other.
  • the first mold and the second mold may be respectively sleeved on the first roller and the second roller, or may be respectively engraved on the first roller and the second roller.
  • the polymer When the first roller and the second roller are placed relatively vertically, the polymer is injected between the two rollers, and the polymer is vertical under the action of gravity and friction between the rollers.
  • the microlens preliminary structure and the accommodation preliminary structure are formed by the two rolls. Then, the two rolls may be simultaneously heated during or after the formation of the microlens preliminary structure and the accommodating preliminary structure, or one of the rolls may be heated to form a microlens structure and a receiving structure.
  • the preset separation distance between the two rollers may be adjusted according to a preset thickness between the microlens structure and the receiving structure to ensure that the first surface and the second surface are different.
  • the fusion portion is formed during the rolling extrusion of the two polymers, so that there is no interface between the microlens structure formed by curing and the graphic structure.
  • the pressing device may further comprise a cutting tool for cutting the polymer film after the polymer film containing the microlens structure and the receiving structure to obtain a subsequent use.
  • a thrust may be applied to pass the polymer horizontally through the two rollers to form a microlens preliminary structure and to accommodate a preliminary structure for heating the two rollers.
  • the formed microlens preliminary structure and the receiving preliminary structure are cured together to form a microlens structure and a receiving structure, respectively.
  • the specific execution process of this method can refer to the specific execution process in which the first roller and the second roller are vertically placed, and will not be described here.
  • a three-dimensional suspension imaging optical film comprising: a transparent spacer layer having opposite surfaces; a microfocus unit array layer disposed on one surface of the transparent spacer layer, the microfocus unit array layer comprising a plurality of micro-focusing units arranged in an irregular arrangement; a micro-textographic element array layer disposed on the other surface of the transparent spacer layer opposite to the micro-focusing unit array layer, the micro-image element array layer comprising a plurality of micro-images
  • the micro-focusing unit array layer is adapted to the micro-textographic element array layer such that the three-dimensional floating imaging optical film is from the micro-image unit or from the micro-focusing unit array layer When viewed on one side, only one and only a suspended image suspended in the transparent spacer layer can be formed.
  • a 3D imaging optical film comprising: a transparent spacer layer having opposite surfaces; a micro-reflective focusing unit array layer disposed on one surface of the transparent spacer layer, the micro-reflective focusing unit array layer Included are a plurality of micro-reflective focusing units arranged in an irregular arrangement; a micro-textographic element array layer disposed on the other surface of the transparent spacer layer opposite to the micro-reflective focusing unit array layer, the micro-textographic unit array layer comprising a plurality of micro-textographic units; the micro-reflective focusing unit array layer is adapted to the micro-image element array layer such that the 3D imaging optical film is present when viewed from a side of the micro-image unit Only a suspended image suspended in the transparent spacer layer can be formed, and the suspended image formed by the 3D imaging optical film is a single channel pattern or a multi-channel pattern.
  • a three-dimensional suspension imaging optical film includes: a transparent spacer layer 10 including a first surface (located on a lower surface of the transparent spacer layer 10 in the drawing) and a relative arrangement Two surfaces (located on the upper surface of the transparent spacer layer 10 in the drawing); a plurality of microfocus units disposed on the first surface of the transparent spacer layer 10.
  • the microfocus unit is asymmetrically arranged on the first surface of the transparent spacer layer to form the microfocus cell array layer 11.
  • the asymmetry appearing herein means that the plane of the plurality of microfocus units on the first surface of the transparent spacer layer 10 does not have a mirror symmetry axis or a central symmetry axis or the like, thereby making a plurality of micro
  • the focusing unit is not arranged in mirror symmetry or center symmetry.
  • the microfocus unit 13 further includes a focusing portion and a reflective structure 14 disposed on a lower surface of the focusing portion.
  • a plurality of micro-text units 12 are disposed on the second surface of the transparent spacer layer to form a micro-text element array layer.
  • the image forming film forms a suspended, enlarged image 45 suspended between the first surface of the transparent spacer layer 10 and the viewer position as viewed from the first surface side of the transparent spacer layer 10, and the enlarged image 45 has and only One is composed of micro-texture unit 44 amplified by micro-focusing unit array layer 43.
  • micro-texture unit 44 amplified by micro-focusing unit array layer 43.
  • the three-dimensional suspension imaging optical film does not include a reflective structure, due to the lack of reflection of the reflective structure, it can be seen from the side of the microfocus unit array layer and only one can be suspended. A suspended image of the transparent spacer layer.
  • the transparent spacer layer 10 is actually a substrate, and the substrate may be a resin layer such as PET, PVC or PMMA.
  • the micro graphic unit 12 is embedded in the transparent spacer layer 10, and a curable resin may be disposed on the surface of the transparent spacer layer 10.
  • the micro graphic unit 12 is embedded in the curable resin.
  • the micro graphic unit 12 is also The surface of the transparent spacer layer 10 may be bonded by an adhesive layer.
  • the microfocus cell array layer 11 is formed on the surface of the transparent spacer layer 10 or bonded to the surface of the transparent spacer layer 10 by an adhesive layer.
  • another structure of the three-dimensional suspension imaging optical film includes: a transparent spacer layer 20, the transparent spacer layer 20 includes a first surface and an oppositely disposed second surface; and a plurality of microfocus units.
  • the microfocus unit is disposed on the first surface of the transparent spacer layer 20; the microfocus unit is arranged on the first surface of the transparent spacer layer without an axis of symmetry to form the microfocus unit array layer 21.
  • the three-dimensional suspension imaging optical film includes a focusing portion and a reflective structure 24 disposed on a surface of the focusing portion.
  • a plurality of micro-text units 22 are disposed on the second surface of the transparent spacer layer 20 to form a micro-text element array layer.
  • the imaging film forms a suspended, magnified image 45 suspended between the first side of the transparent spacer layer 20 and the viewer position, and the magnified image 45 has and only One is composed of the micro-image unit 44 through the micro-focus unit array layer 43; when the film 41 or the shaft 42 is rotated, or the image film is tilted left and right or back and forth, there is no other second magnified micrograph.
  • the image 45 of the text unit enters the viewing area.
  • the micro-focusing unit 23, the transparent spacer layer 20, and the micro-texture unit 22 are integrated, that is, the micro-focusing unit 23 and the micro-texture unit 22 and the transparent spacer layer 20 are formed by one curing.
  • Such a three-dimensional suspension imaging optical film is thinner than that of Figure 17a due to the absence of a substrate.
  • the micro graphic unit 22 is embedded in the transparent spacer layer 20, and the transparent spacer layer 20 is a curable resin.
  • the micro focusing unit 23 and the micro graphic unit 22 are directly formed and cured on the surface of the curable resin through a mold. Filled to make.
  • the micro-image unit 22 may be formed in a groove pattern on the second surface of the transparent spacer layer 20, or may be one or more of a resin, a dyeing material, a coloring material or a metal in which a refractive index difference is filled in the groove. Combination.
  • another structure of the three-dimensional suspension imaging optical film comprises: a transparent spacer layer 30, the transparent spacer layer 30 comprising a first surface (the upper surface of the transparent spacer layer 30 in the figure) and a relative arrangement The second surface (the lower surface of the transparent spacer layer 30 in the figure).
  • a plurality of microfocus units are disposed on the first surface of the transparent spacer layer 30; the microfocus unit is asymmetrically arranged on the first surface of the transparent spacer layer to form the microfocus unit array layer 31.
  • the microfocus unit 33 includes a focusing portion and a reflective structure 34 disposed on an upper surface of the focusing portion.
  • a plurality of micro-text units 32 are disposed on the second surface of the transparent spacer layer 30 to form a micro-text element array layer.
  • the image forming film forms a suspended, enlarged image 45 suspended between the second surface of the transparent spacer layer 30 and the viewer position as viewed from the second surface side of the transparent spacer layer 30, and the enlarged image 45 has and only One is composed of micro-texture unit 44 amplified by micro-focusing unit array layer 43.
  • micro-texture unit 44 amplified by micro-focusing unit array layer 43.
  • the micro focusing unit 33, the transparent spacer layer 30 and the microtext unit 32 are integrated, that is, the micro focusing unit 33 and the micro graphic unit 32 are formed directly on the transparent spacer layer 30.
  • Such a three-dimensional suspension imaging optical film is thinner than that of FIG. 17a because there is no substrate, wherein the micro-texture unit 32 is convexly disposed on the surface of the transparent spacer layer 30, at which time the transparent spacer layer 30 is a curable resin, first curable. The surface of the resin forms a microfocus unit 33, which is then solidified.
  • the micro graphic unit 32 can be formed on the second surface of the transparent spacer layer 30 by inkjet printing, screen printing, photolithography, or embossing;
  • the material of the unit 32 is one or a combination of a resin having a refractive index difference, a dyeing material, a coloring material, or a metal.
  • the second surface of the three-dimensional suspension imaging optical film of the structure is further provided with a protective layer 35, and the protective layer 35 can also be a bonding layer, so that the micro graphic can be well protected. Unit, at this time, the thickness of this film is greater than the film thickness in Figure 17b.
  • the microtextographic elements of Figures 17a and 17b can each be provided with a protective layer, and the protective layer can likewise have bonded features.
  • the surface of the micro-image unit can be provided with a protective layer, and the protective layer can also be provided with a protective layer.
  • the protective layer may include UV glue, OCA glue, and other transparent or visually clear polymers that do not chemically react.
  • the microfocus unit is randomly or non-periodically arranged on the first surface of the transparent spacer layer; the total thickness of the microfocus unit, transparent spacer and microtext unit is in microfocus One-half of the radius of curvature of the element is between three times the radius of curvature of the micro-focusing unit.
  • the reflective structures 14, 24, and 34 are a single dielectric layer, a multilayer dielectric layer, a metal reflective structure, or a multilayer structure composed of a metal reflective structure and a dielectric layer, and the reflective structure has a thickness of 20 nm to 5 ⁇ m.
  • Reflective structures 14, 24, and 34 are disposed on the surface of the micro-focusing unit array layer, which makes it possible to fit the side of the micro-image unit of the floating imaging optical film with the actual application product in practical applications, from where the micro-text unit is located. Viewing the imaging of the micro-texture unit on the side, which avoids the problem of affecting the user experience effect caused by the unevenness of the side of the micro-focusing unit array layer when observing the imaging of the micro-textographic unit from the side of the micro-focusing unit array layer. Helps to improve the user experience.
  • the microtext element may also be a micro-embossed micro-pattern of micro-printed patterns, filled pigments or dyes, micro-patterns or printed patterns of line structures, filled pigments or a combination of at least two of a surface micro-embossed micro-pattern of the dye and a micro-pattern of the line structure; wherein the micro-image element array layer is imaged by the micro-focusing unit array layer to form an image, the image or the enlarged image There is only one, and the enlarged image is a single channel pattern or a multi-channel pattern. It should be noted here that "there is only one" is not an icon or graphic, such as a multi-channel pattern.
  • the image must have an original image unit. It can be understood that the original image unit forms an image through the action of an optical device.
  • the original image unit here is a complete graphic or a graphic that can express a complete meaning, so the "one and only one” here is defined according to the original image unit, and the resulting image is only one original image unit. That is, there is “there is only one” and the number of images cannot be judged according to the connected domain.
  • the micro-text unit position coordinates are adapted to the micro-focus unit, the phase coordinates being adapted to the position coordinates of the micro-texture unit in the second surface by micro-focusing in the first surface
  • the position coordinates of the unit are obtained by transformation, and the transformation includes a coordinate scaling transformation or a coordinate rotation transformation, or a combination thereof. Specifically, reference may be made to the above, and the description will not be repeated here.
  • the parameters of the micro-textographic unit and the micro-focusing unit can be configured with reference to the above description, and will not be described again.
  • the microfocus unit includes a cylindrical mirror, a spherical mirror, or an aspheric mirror.
  • a remaining portion of the first surface of the transparent spacer layer or a remaining portion of the second surface of the transparent substrate is provided with a holographic anti-counterfeiting unit, a Fresnel relief structure unit, a light-changing unit, a sub-wavelength micro-structure unit,
  • the photosensitive photosensitive unit or printed pattern either a dielectric layer, a metal layer, or coated with ink, fluorescent, magnetic, phosphorous, selective absorption or having a micro/nano structure.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 17a a schematic structural view of a three-dimensional suspension imaging optical film.
  • the film has a three-layer structure: a transparent spacer layer 10, a two-dimensional microfocus cell array layer (or microfocus cell array) 11 and a microtext element layer (microtextographic unit) 12.
  • the two-dimensional micro-focusing unit array layer 11 has a micro-focusing unit 13 and a micro-reflecting unit (or reflective structure) 14.
  • the transparent spacer layer 10 has a thickness of from 10 micrometers to 5000 micrometers. Preferably, the transparent spacer layer has a thickness of less than 1000 micrometers.
  • the transparent spacer material may be PC, PVC, PET, PMMA, UV-sensitive curing adhesive, glass or BOPP, etc., preferably selected as PET and UV-sensitive curing adhesive.
  • the microfocus unit 13 and the micro-reflection unit 14 focus the incident light from the second surface side of the transparent spacer layer on the microtext layer 12 by reflection.
  • the microfocus unit 13 may be a refractive reflection unit or a diffraction reflection unit.
  • a refraction reflection unit such as a one-dimensional cylindrical surface, a two-dimensional spherical surface or an aspherical mirror
  • the focal length is about one-half of its radius of curvature
  • the aperture size is from 10 to 1000 micrometers.
  • the aperture size is from 25 to 500.
  • the microfocus lens has a numerical aperture of 0.1 to 4.0.
  • the microfocus lens has a numerical aperture of less than 2.0.
  • the material of the microfocus unit 13 may be PC, PVC, PET, PMMA, UV sensitive adhesive, glass or BOPP, etc., preferably, selected as an ultraviolet sensitive curing adhesive.
  • the material of the micro-reflecting unit 14 is a single-layer dielectric layer, a multi-layer dielectric layer, a metal reflective structure or a multilayer structure composed of a metal reflective structure and a dielectric layer.
  • the microtext layer 12 is composed of a microprinted pattern, a surface microrelief micropattern of a filler pigment or dye, a line structure micropattern or a printed pattern, a surface microrelief micropattern of a filler pigment or dye, and a combination of at least two of a line structure micropattern. Composition.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 15 is a schematic diagram of the visual effect of a 3D stereoscopic imaging film in the present application.
  • the optical film as described in the first embodiment of the present application can enlarge the micro-text 44 originally hidden in the micro-pattern layer to be directly distinguishable by the naked eye.
  • the observer observes from the side of the second surface of the transparent spacer layer and will see the only enlarged microtext 45 suspended between the viewer and the second surface of the transparent spacer. No matter when the imaging film is rotated along the horizontal axis 41 or rotated along the vertical axis 42, no other image of the second magnified micro-text unit enters the viewing area.
  • the active microfocus unit 43 since the active microfocus unit 43 is located on the second surface of the transparent spacer layer, it can be sealed using a protective material.
  • a protective material such as water, the imaging effect of the 3D optical film of the present application will not be affected.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the present application provides a method for fabricating a 3D optical imaging film, comprising the following steps:
  • the imprint stencil material may be composed of nickel (Ni), nickel cobalt (NiCo) alloy, nickel iron (NiFe) alloy, nickel silicon carbide (NiSiC) or the like.
  • the embossing method may be a flat-to-flat, roll-to-flat or roll-to-roll method;
  • a micro-reflective structure in the micro-reflective array layer such as a single-layer dielectric layer, a multi-layer dielectric layer, a metal reflective structure, or a multilayer structure composed of a metal reflective structure and a dielectric layer.
  • the dielectric material is magnesium fluoride, titanium dioxide, silicon dioxide, metal oxides and dielectric oxides, and the metal material is aluminum, silver, copper or alloys thereof;
  • the stencil-imprinted micro-nano structure layer having the opposite to the micro-nano structure layer to be pressed is simultaneously cured by irradiation to cure the ultraviolet-curable adhesive, or the heat-sensitive material is cured by cooling to obtain a microlens array layer.
  • the imprint stencil material may be composed of nickel (Ni), nickel cobalt (NiCo) alloy, nickel iron (NiFe) alloy, nickel silicon carbide (NiSiC) or the like.
  • the embossing method can be flat-to-flat, roll-to-flat or roll-to-roll.
  • the micro/nano structure layer can also form an enlarged pattern that can be observed by the human eye by printing, using ink, fluorescent, magnetic, phosphorous, and selective absorbing materials.
  • Embodiments of the present application provide a micro-optical imaging film including a transparent spacer layer, a micro-transmission focusing unit array layer, and a graphic variable layer.
  • the transparent spacer layer includes a first surface and a second surface disposed opposite to each other; the micro-transmissive focusing unit array layer is disposed on a first surface of the transparent spacer layer, and the micro-transmission focusing unit array layer includes at least two a micro-transmission focusing unit arranged asymmetrically; the graphic variable layer is disposed on a second surface of the transparent spacer layer, the graphic variable layer comprising at least two micro-text units, the micro
  • the telegram unit includes at least two lattices in an on or off state; the teletext variable layer is associated with the micro-transmission focusing unit array layer such that all lattices in an on state pass through The micro-transmission focusing unit is formed with one and only one suspended image.
  • the "has one and only one" floating image in this article is not an icon or graphic, such as a multi-channel pattern.
  • the image must have an original image unit, and it can be understood that the original image unit forms an image through the action of the optical device.
  • the original image unit here is a complete graphic or a graphic that can express a complete meaning, such as a company logo composed of an English letter or multiple English letters, so the "has one and only one” here is based on the original image.
  • the unit defines that the resulting image is only one original image unit, that is, "there is only one" and the number of images cannot be judged according to the connected domain.
  • the "having one and only one" floating image does not mean that the micro-optical imaging film can only form a single floating image, but refers to the same micro-image unit (a micro-text unit refers to One or more of the same micro-image units), the dot matrix in the on-state of all the micro-text units can form a unique one-of-a-half image corresponding to the micro-image unit through the micro-transmission focusing unit.
  • a micro-text unit refers to One or more of the same micro-image units
  • the dot matrix in the on-state of all the micro-text units can form a unique one-of-a-half image corresponding to the micro-image unit through the micro-transmission focusing unit.
  • each micro-text unit is uniquely formed.
  • a floating image is different.
  • micro-optical imaging film provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.
  • a micro-optical imaging film includes a transparent spacer layer 910, a micro-transmission focusing unit array layer 911, and a graphic variable layer 912.
  • the transparent spacer layer 910 includes a first surface (which is the upper surface of the transparent spacer layer 910 in FIG. 18a) and a second surface (which is the lower surface of the transparent spacer layer 910 in FIG. 18a) disposed opposite each other.
  • the micro-transmission focusing unit array layer 911 is located on the first surface of the transparent spacer layer 910
  • the graphic variable layer 912 is located on the second surface of the transparent spacer layer 910.
  • the transparent spacer layer 910 can be used to adjust the distance between the micro-transmissive focusing unit array layer 911 and the graphic variable layer 912, that is, can be used to adjust the focal length of the micro-transmissive focusing unit array layer 911.
  • the transparent spacer layer 910 can be a substrate, and the substrate can be PET (polyethylene terephthalate), PVC (polyvinyl chloride) or PMMA (Polymethyl Methacrylate). Resin material such as ester). It should be noted that “transparent” in the “transparent spacer layer” may mean that the transparent spacer layer is a transparent material, or that the transparent spacer layer is visually transparent, that is, the light transmittance may be 70% or more.
  • the micro-transmission focusing unit array layer 911 is for imaging the graphic variable layer 912, which is disposed on the first surface of the transparent spacer layer 910, which may include several (ie, at least two) micro-transmission focusing units 9110.
  • the micro-transmission focusing unit 9110 may include one or more microlenses, and there may or may not be a gap between the plurality of microlenses.
  • the micro-transmission focusing unit 9110 may be formed on the first surface of the transparent spacer layer 910, which may be understood as a micro-transmission focusing unit array.
  • the surface of the bottom end of the micro-transmission focusing unit 9110 in the layer 911 is directly in contact with the first surface of the transparent spacer layer 910; the micro-transmission focusing unit 9110 may also be bonded to the first surface of the transparent spacer layer 910 by an adhesive layer. It can be understood that an adhesive layer is adhered between the surface at the bottom end of the micro-transmission focusing unit 9110 and the first surface of the transparent spacer layer 910 in the micro-transmission focusing unit array layer 11.
  • the micro-transmission focusing unit 9110 is arranged in a non-symmetric axis (ie, asymmetrical) on the first surface of the transparent spacer layer 910 to form a micro-transmission focusing unit array layer 911.
  • a non-symmetric axis ie, asymmetrical
  • the arrangement of the micro-transmission focusing unit appearing in the first surface of the transparent spacer layer with no axis of symmetry may mean that the plurality of micro-transmission focusing units do not have the first surface of the transparent spacer layer 910.
  • a mirror symmetry axis or a central symmetry axis or the like is mirrored such that the plurality of micro-transmission focusing units are not arranged in mirror symmetry or center symmetry.
  • the arrangement of the micro-transmissive focusing unit on the first surface of the transparent spacer layer having an axis of symmetry may also include the micro-transmissive focusing unit being randomly or non-periodically arranged on the first surface of the transparent spacer layer.
  • the microtext variable layer 912 can be used to form a graphic or microtext (ie, micron-level graphics and/or text) that can be changed, and the change can be a change in size or a shape change, which can Adhered directly to the second surface of the transparent spacer layer 910.
  • the graphic variable layer 912 may be a display device including a pixel, such as an LCM (Liquid Crystal Display Module).
  • the graphic variable layer 12 may include several (ie, at least two) micro-text units, and the micro-text unit may include one or more micro-texts, and each micro-text may be turned on by a plurality of The dot matrix combination is formed; it can also be formed by a combination of dots that are in an on state and whose display brightness reaches a preset brightness. Turning on or off different lattices can result in different (ie, changeable) graphics or microtexts. Different (micro) images can form different floating images through the micro-transmission focusing unit, which can meet the user's need to form different images for different application scenarios, thereby improving the user's visual experience.
  • the (micro)text can be a single channel pattern or a multi-channel pattern.
  • the lattice may be a pixel or a single or multiple illumination sources.
  • the pixel may be obtained from an LCM display, an OLED (Organic Light-Emitting Diode) or an LED (Light-Emitting Diode) display, or may be from other pixels with pixels. Obtained in the display device.
  • the single or multiple illumination sources can be LEDs.
  • the LED display here is a backlight source that uses LEDs.
  • the LEDs can be a single diode, such as some light box display devices. So whether it is a pixel, or a single or multiple sources of illumination, the micro-text elements they make up are made up of discrete points.
  • the plurality of micro-text units may have a common lattice between the plurality of micro-text units, for example, the first micro-text unit includes a first dot matrix in an on state and a second dot matrix in an off state, and the second micro graphic unit includes In the second dot matrix in the on state, the first micro graphic unit and the second micro graphic unit have a common second lattice.
  • the micro-textographic unit is associated with the micro-transmission focusing unit such that all of the lattices in an on state are formed by the micro-transmission focusing unit with one and only one suspended image, ie, to cause the micro-text
  • the unit forms a unique one of the suspended images by the micro-transmission focusing unit.
  • the correlation may be obtained by a preset transformation of position coordinates of the micro-image unit by a positional coordinate of the micro-transmission focusing unit located at the first surface of the transparent spacer layer, and the preset transformation may include coordinate scaling transformation or coordinate rotation transformation, Or a combination thereof, but is not limited to the above transformation. Specifically, reference may be made to the above, and the description will not be repeated here.
  • An image that is magnified by a microtext of a display device containing pixels may include the following relationships:
  • (1) Obtaining, according to the position coordinates of the micro-transmission focusing unit, the position coordinates of the micro-text unit by a preset transformation, the preset transformation comprising a coordinate scaling transformation or a coordinate rotation transformation, or a combination thereof.
  • the center of the liquid crystal display module ie, the display device
  • the above coordinate position is the physical position of the display device
  • the micro-text is obtained after the change in the above step (1)
  • the position coordinates of the unit are confirmed by the physical coordinates based on the pixel period a or the size (x/a, y/a).
  • the number of corresponding pixels (d/a) under the micro-transmission focusing unit is confirmed according to the aperture d of the micro-transmission focusing unit and the pixel period a, and the pixels of the confirmation are used to illuminate the desired micro-text unit.
  • the remaining portion of the first surface of the transparent spacer layer refers to a portion other than the micro-transmission focusing unit) or the remaining portion of the second surface of the transparent substrate (refers to the micro-image unit) Part) provided with a holographic anti-counterfeiting unit, a Fresnel relief structure unit, a light-changing unit, a sub-wavelength microstructure unit, a dynamic photosensitive unit or a printed pattern, or a dielectric layer, a metal layer, or coated with ink, fluorescent, magnetic Phosphorus, selective absorption or materials with a micro-nano structure.
  • the transparent spacer layer has a thickness between 10 microns and 5000 microns. Preferably, the transparent spacer layer has a thickness of less than 1000 microns.
  • the material of the transparent spacer layer may be PC, PVC, PET, PMMA, UV-sensitive curing adhesive, glass or BOPP. Preferably, the material of the transparent spacer layer is PET and UV-sensitive curing adhesive.
  • the micro-transmission focusing unit may be a refractive transmission unit or a diffraction transmission unit.
  • the refractive transmission unit may have a diameter of 10 to 1000 ⁇ m.
  • the caliber size is from 25 to 500 microns.
  • the micro-transmission focusing unit may be a micro-focusing lens having a numerical aperture of from 0.1 micrometer to 4.0 micrometers.
  • the microfocus lens has a numerical aperture of less than 2.0 micrometers.
  • the material of the micro-transmission focusing unit may be PC, PVC, PET, PMMA, UV-sensitive adhesive, glass or BOPP, etc., preferably, is an ultraviolet-sensitive curing adhesive.
  • the distance between the micro-image unit and the focal plane of the micro-transmission focusing unit may be less than or equal to the micro-transmission. Focusing on 20% of the focal length of the unit.
  • the total thickness of the microtext element, the transparent spacer layer, and the micro-transmission focusing unit (eg, the top end of the micro-transmission focusing unit 9110 in FIG. 1 to the bottom end of the micro-image unit 9120
  • the distance between the two may be between two times the radius of curvature of the micro-transmission focusing unit to sixteen times the radius of curvature of the micro-transmission focusing unit to facilitate clear imaging of the micro-textographic unit.
  • the effective diameter of the micro-transmission focusing unit may be from 20 micrometers to 1000 micrometers.
  • the effective diameter of the micro-transmission focusing unit may be 20 micrometers to 500 micrometers, 55 micrometers to 200 micrometers, or 300 micrometers to 450 micrometers.
  • the micro-transmission focusing unit may have an effective diameter of 550 microns to 900 microns.
  • the focal length of the micro-transmission focusing unit may be from 10 micrometers to 2000 micrometers. Specifically, the focal length of the micro-transmission focusing unit may be 20 micrometers to 100 micrometers, 200 micrometers to 450 micrometers, 550 micrometers to 900 micrometers, or 1050 micrometers to 1500 micrometers.
  • the total thickness of the micro-optical imaging film can be less than 5000 microns in order to enable the micro-optical imaging film to be used in more fields.
  • the film can be a substrateless or thin substrate structure, and the total thickness of the micro-optical imaging film can be from 20 micrometers to 200 micrometers.
  • the total thickness 300 of the micro-optical imaging film may be from micrometer to 500 micrometers.
  • the transparent spacer layer can be glass or glass thick.
  • a film of which the total thickness of the micro-optical imaging film may be from 600 micrometers to 1000 micrometers, and even the micro-optical imaging film may be thicker, such as 1200 micrometers, 1300 micrometers, 1500 micrometers, 2000 micrometers, 2500 micrometers, 3500 micrometers or 4500 microns.
  • the micro-optical imaging film includes a transparent spacer layer 920, a micro-transmissive focusing unit array layer 921, and a graphic variable layer 924.
  • the transparent spacer layer 920 includes a first surface (which is the upper surface of the transparent spacer layer 920 in FIG. 18b) and a second surface (which is the lower surface of the transparent spacer layer 920 in FIG. 18b) disposed opposite each other.
  • the micro-transmission focusing unit array layer 921 is formed on the first surface of the transparent spacer layer 910, and the graphic variable layer 912 is located on the second surface of the transparent spacer layer 910.
  • the micro-transmission focusing unit array layer 921 includes a plurality of micro-transmission focusing units 923 arranged in a non-symmetric axis.
  • the micro-transmission focusing unit 923 may be formed directly on the first surface of the transparent spacer layer 920.
  • the micro-transmission focusing unit array layer 921 is integrated with the transparent spacer layer 910, that is, there is no interface between the micro-transmissive focusing unit array layer 921 and the transparent spacer layer 910, which is advantageous for reducing the film. thickness of.
  • the graphic variable layer 924 can be located on the second surface of the transparent spacer layer 910, which can include a plurality of microtext elements 922 formed by a combination of several lattices.
  • the teletext variable layer 924 can be a display device containing pixels, such as an LCM.
  • micro-optical imaging film shown in Figure 18b differs from the micro-optical imaging film shown in Figure 18a in that the micro-transmissive focusing unit 923 of Figure 18b can be formed directly on the first surface of the transparent spacer layer 920. There is no interface between the micro-transmission focusing unit array layer 921 and the transparent spacer layer 910.
  • micro-optical imaging film shown in Figure 18b A detailed description of the micro-optical imaging film shown in Figure 18b can be referred to the description of the micro-optical imaging film shown in Figure 18a, which is not described herein.
  • the micro-optical imaging film includes a transparent spacer layer 932, a micro-transmission focusing unit array layer 931, and a graphic variable layer 933.
  • the transparent spacer layer 932 includes a first surface (which is the upper surface of the transparent spacer layer 932 in FIG. 18c) and a second surface (which is the lower surface of the transparent spacer layer 932 in FIG. 18c) disposed opposite each other.
  • the micro-transmission focusing unit array layer 931 is located on the first surface of the transparent spacer layer 932
  • the graphic variable layer 933 is located on the second surface of the transparent spacer layer 932.
  • the micro-transmission focusing unit array layer 931 includes a plurality of micro-transmission focusing units 934 arranged in a non-symmetric axis.
  • the micro-transmission focusing unit 934 may be formed inside the micro-transmission focusing unit array layer, and the top end thereof may be located on a surface of the micro-transmission focusing unit array layer 931, but the bottom end thereof is not in the micro-transmissive focusing unit array layer 931 and the surface The opposite surface is in contact.
  • the other surface of the micro-transmissive focusing unit array layer 931 may be in direct contact with the first surface of the transparent spacer layer 910 or may be in contact with the first surface of the transparent spacer layer 910 through an adhesive layer.
  • the graphic variable layer 933 may be located on a second surface of the transparent spacer layer 932, which may include a plurality of microtext elements 935, which may be formed by a combination of several lattices.
  • the graphic variable layer 933 may be a display device containing pixels, such as an LCM.
  • the micro-optical imaging film shown in Fig. 18c differs from the micro-optical imaging film shown in Fig. 18a in that the bottom end of the micro-transmission focusing unit 934 in Fig. 18c is not located in the micro-transmission focusing unit array layer 931. On the surface in contact with the first surface of the transparent spacer layer 932.
  • micro-optical imaging film shown in Figure 18c A detailed description of the micro-optical imaging film shown in Figure 18c can be referred to the micro-optical imaging film shown in Figure 18a. Description, no longer mentioned here.
  • Figure 19 is a schematic view showing the visual effect of the micro-optical imaging film of Figures 18a-18c.
  • the micro-optical imaging film is suspended, magnified between the first surface of the transparent spacer layer 40 and the viewer position as viewed from the side of the first surface of the transparent spacer layer 40.
  • the image 45, and the image 45 has one and only one, is composed of the microtext unit 44 amplified by the micro-transmission focusing unit array layer 43.
  • the viewing area may generally represent the area occupied by the first surface.
  • the image may be a single channel pattern or a multi-channel pattern.
  • the embodiment of the present application sets the micro-transtext unit in the variable layer of the graphic to include at least two in the asymmetric arrangement by setting the micro-transmission focusing unit in the micro-transmission focusing unit array layer. Turning on or off the dot matrix, and associating the micro-transmission focusing unit with the micro-text unit, forming a floating image in the observation area with only one corresponding graphic variable layer, which is provided with The only suspension image is the purpose of the imaging film.
  • the structure proposed by the present application realizes the principle of floating magnified image, as shown in FIG. Specifically, reference may be made to the above description, and the description will not be repeated here.
  • the display device 60 is provided with a micro-optical imaging film 61.
  • the display device 60 may be one of LCM, LED, OLED, etc., and the display device includes, but is not limited to, the above.
  • the display device 60 can be partially or have the micro-optical imaging film features described above, as shown in FIG.
  • the present application provides a method for fabricating a micro-optical imaging film, comprising the following steps:
  • the imprinting template material may be a metal such as nickel (Ni), nickel-cobalt (NiCo) alloy or nickel-iron (NiFe) alloy, or may be an organic synthetic polymer such as polyethylene (PE) or polycarbonate resin (PC). Materials, etc.
  • the embossing method may be flat-to-flat, roll-to-flat or roll-to-roll mode;
  • variable image layer in the micro-optical imaging film provided by the embodiment of the present application may be a 65-inch liquid crystal display module having a pixel size of 375 micrometers.
  • a total of 25*25 pixels can be combined to form a micro-textographic unit, and the corresponding micro-transmissive focusing unit can have a aperture of 9,500 micrometers.
  • the enlarged image has a size of 1.87 m and a levitation height of 1 m.
  • Embodiments of the present application provide a micro-optical imaging system including a micro-optical imaging film and a control device.
  • the micro-optical imaging film comprises a transparent spacer unit (ie, a transparent spacer layer), a micro-transmissive focusing unit array layer, and a graphic variable layer.
  • the transparent spacer unit has a first surface and a second surface disposed opposite to each other; the micro-transmissive focusing unit array layer is disposed on a first surface of the transparent spacer unit, and the micro-transmission focusing unit array layer includes at least two a micro-transmission focusing unit arranged asymmetrically; the graphic variable layer is disposed on a second surface of the transparent spacing unit, the graphic variable layer comprising at least two micro-text units, the micro
  • the telegram unit includes at least two lattices in an on or off state; position coordinates of the microtext unit can be determined by the position of the micro transmission focusing unit The coordinates are obtained by a preset transformation, which is transformed into a transformation function having one and only one fixed point, so that all the lattices in the on state are formed by the micro-transmission focusing unit and have only one floating image.
  • the control device is for controlling the on, off and/or display brightness of the dot matrix. Specifically, the structure of the micro-optical imaging film can be
  • the embodiment of the present application sets the micro-transtext unit in the variable layer of the graphic to include at least two in the asymmetric arrangement by setting the micro-transmission focusing unit in the micro-transmission focusing unit array layer. Turning on or off the dot matrix, and associating the micro-transmission focusing unit with the micro-text unit, forming a floating image in the observation area with only one corresponding graphic variable layer, which is provided with The only suspension image is the purpose of the imaging film.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

La présente invention concerne un film optique (60, 100) comportant un premier polymère avec une première surface et un second polymère avec une seconde surface. La première surface est en regard de la seconde surface. Une structure de microlentille (601, 1001) est formée sur la première surface, et la seconde surface est dotée d'une structure de réception (602, 1002). La structure de réception (602, 1002) contient plusieurs structures à motifs (603, 1003) dont les images sont reproduites à travers la structure de la microlentille (601, 1001). Une partie de fusion est formée entre les parties voisines du premier et du second polymère, de sorte que la structure de la microlentille (601, 1001) et la structure de réception (602, 1002) forment une structure intégrale. Une unité de micro-focalisation (601, 1001) correspond à la structure à motifs (602, 1002), de sorte que le film optique (60, 100) puisse former une image flottante qui flotte sur le film optique (60, 100) lorsqu'elle est observée depuis le côté de la structure à motifs (602, 1002) ou depuis le côté de l'unité de micro-focalisation (601, 1001). Le film optique (60, 100) n'a aucune couche de substrat, de sorte que l'épaisseur du film optique (60, 100) est réduite. En outre, le film optique (60, 100) possède une bonne performance mécanique, et peut être facilement découpée lors d'une impression par transfert thermique.
PCT/CN2016/089080 2015-07-08 2016-07-07 Film optique Ceased WO2017005204A1 (fr)

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CN201520488516.5 2015-07-08
CN201520487868.9 2015-07-08
CN201510397870.1A CN106324846B (zh) 2015-07-08 2015-07-08 悬浮成像光学薄膜
CN201510397668.9 2015-07-08
CN201510397870.1 2015-07-08
CN201520487868.9U CN205608222U (zh) 2015-07-08 2015-07-08 光学薄膜
CN201520488516.5U CN205280964U (zh) 2015-07-08 2015-07-08 一种三维悬浮成像光学薄膜
CN201510397444.8 2015-07-08
CN201520489822.0 2015-07-08
CN201520489822 2015-07-08
CN201510397444.8A CN106324726B (zh) 2015-07-08 2015-07-08 一种3d成像光学薄膜
CN201510397668 2015-07-08
CN201520827379.3 2015-10-23
CN201510699172.7 2015-10-23
CN201520827379.3U CN205374782U (zh) 2015-07-08 2015-10-23 一种微光学成像系统
CN201510699172.7A CN106338786B (zh) 2015-07-08 2015-10-23 一种微光学成像薄膜

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CN109979310A (zh) * 2019-05-17 2019-07-05 四川芯辰光微纳科技有限公司 一种基于动态防伪薄膜的图文保护结构及其制备方法
CN111830726A (zh) * 2019-04-19 2020-10-27 昇印光电（昆山）股份有限公司 3d成像薄膜
CN112835136A (zh) * 2021-03-19 2021-05-25 深圳市科创防伪技术发展有限公司 一种微透镜阵列膜及其制作方法
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