CN114815006A - Photochromic film with dynamic amplification - Google Patents

Photochromic film with dynamic amplification Download PDF

Info

Publication number
CN114815006A
CN114815006A CN202110072097.7A CN202110072097A CN114815006A CN 114815006 A CN114815006 A CN 114815006A CN 202110072097 A CN202110072097 A CN 202110072097A CN 114815006 A CN114815006 A CN 114815006A
Authority
CN
China
Prior art keywords
layer
photochromic
fluoride
dynamically
oxide
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202110072097.7A
Other languages
Chinese (zh)
Inventor
孙洪保
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.)
Huizhou Foryou Optical Technology Co ltd
Original Assignee
Huizhou Foryou Optical Technology 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
Application filed by Huizhou Foryou Optical Technology Co ltd filed Critical Huizhou Foryou Optical Technology Co ltd
Priority to CN202110072097.7A priority Critical patent/CN114815006A/en
Publication of CN114815006A publication Critical patent/CN114815006A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

The invention discloses a photochromic film with dynamic amplification, which comprises a dynamic amplification layer and a strong light photochromic layer; the dynamic amplification layer comprises a micro-lens array layer and a substrate layer; the strong light color changing layer comprises a dielectric film stack filter layer and a metal nano particle layer, and the metal nano particle layer is arranged on the upper surface of the dielectric film stack filter layer; the metal nanoparticle layer of the strong light discoloring layer is connected with the base material layer of the dynamic amplification layer; the strong light color changing layer forms a Fabry-Perot interference cavity. The dynamically amplified photochromic film disclosed by the invention can simultaneously realize the three-dimensional dynamic effect display of the pattern and the optical characteristic that the color of the pattern can be changed under the irradiation of strong visible light, has technical originality and has huge application potential in the fields of dynamic display and anti-counterfeiting.

Description

Photochromic film with dynamic amplification
Technical Field
The invention relates to a film in the technical field of anti-counterfeiting, in particular to a film which has a three-dimensional dynamic effect and can change color under strong light.
Background
The colors in nature are mainly derived from the interaction of light and substances, such as most common dyes or pigments, and generate different colors by absorbing light with specific wavelengths, but the color development is not only low in vividness and small in color gamut area, but also low in resolution. The micro-nano structures of different materials are designed, so that the light and the object have the effects of interference, diffraction, scattering, transmission and the like, and the object is colored, namely the structural color of the object. In recent years, the technical field of structural design colors is continuously developed, wherein an important branch is that the structural color of plasma is realized through a micro-nano structure of a special material, the interaction of light and a plasma nano structure is utilized, the bright structural color of a visible light wave band can be realized, the color is easy to regulate and control, the chroma is high, and the spatial resolution reaches the optical diffraction limit.
When light interacts with the metal nanostructure, the electric field of the incident light redistributes free electrons in the metal nanostructure to produce polarization, and simultaneously enhances the absorption of light by the metal structure, referred to as localized surface plasmon resonance. The local surface plasmon resonance confines energy in a spatial range of a sub-wavelength scale, and the absorption of light can be modulated only by adjusting the parameters of the metal nanostructure, so that the corresponding transmission/reflection spectrum is finally changed. Therefore, the structural color device based on localized surface plasmon attracts great attention in recent years due to its advantages of ultra-high resolution, good stability, high tolerance of large viewing angle observation, etc. The local surface plasma resonance effect is sensitive to external environment (such as ambient refractive index) or light, heat, chemical reaction and the like, so that the plasma structural color device is different from a single-response structural color device, can integrate two or more colors into one pixel unit to become a color-adjustable structural color device, and shows great application potential in the fields of encryption, dynamic color development and anti-counterfeiting.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a film which can simultaneously realize the three-dimensional dynamic effect display of patterns and the color change of the patterns under the irradiation of strong visible light.
In order to achieve the purpose, the invention adopts the technical scheme that: a dynamically amplified photochromic film comprising a dynamically amplifying layer and a highlight photochromic layer;
the dynamic amplification layer comprises a micro-lens array layer and a substrate layer;
the strong light color changing layer comprises a dielectric film stack filter layer and a metal nano particle layer, and the metal nano particle layer is arranged on the upper surface of the dielectric film stack filter layer;
the metal nanoparticle layer of the strong light discoloring layer is connected with the base material layer of the dynamic amplification layer;
the strong light color changing layer forms a Fabry-Perot interference cavity.
The basic structure of the dynamically amplified photochromic film is a metal nanoparticle layer arranged on the surface of the filtering layer of the dielectric film stack, and the local surface plasma resonance effect of the photochromic film enhances the scattered light, so that the photochromic film shows two different colors of optical responses under ambient light and strong visible light irradiation, and is essentially different from the traditional photochromic phenomenon. With the development of micro-nano processing technology and the high requirement of the certificate ticket on anti-counterfeiting technology, the single anti-counterfeiting technology is difficult to be applied and developed in the field. The plasma structural color composite structure breaks through the resolution of the optical diffraction limit, is very suitable for being combined with a micro-lens array to be used as a pixel unit for forming a pattern, has strong light and color change, enables the pattern to have a three-dimensional dynamic effect, realizes multiple anti-counterfeiting functions, and greatly upgrades the counterfeiting difficulty.
As a preferred embodiment of the dynamically amplified photochromic thin film, the dielectric film stack filter layer is (aH) 1 bL 1 ) n cH 2 And n is an integer, a is more than or equal to 0, b is less than or equal to 6, and c is more than 0 and less than or equal to 6.
As a preferred embodiment of the dynamically amplified photochromic thin film of the present invention, the dielectric film stack filter layer includes a high refractive dielectric layer and a low refractive dielectric layer, and the metal nanoparticle layer is located on the upper surface of the high refractive dielectric layer; as a more preferable embodiment of the dynamically-enlarged photochromic thin film of the present invention, the material of the high-refractive medium layer is a material having a refractive index greater than 1.65, and the material of the low-refractive medium layer is a material having a refractive index less than or equal to 1.65.
As a preferred embodiment of the dynamically-enlarged photochromic thin film of the present invention, the material of the high refractive index layer is at least one of lanthanum titanate, trititanium pentoxide, niobium pentoxide, zinc sulfide, zinc oxide, zirconium oxide, titanium dioxide, carbon, indium oxide, indium tin oxide, tantalum pentoxide, cerium oxide, yttrium oxide, europium oxide, iron oxide, triiron tetroxide, hafnium nitride, hafnium carbide, hafnium oxide, lanthanum oxide, magnesium oxide, neodymium oxide, praseodymium oxide, samarium oxide, antimony trioxide, silicon carbide, silicon nitride, silicon monoxide, selenium trioxide, tin oxide, and tungsten trioxide; as a more preferable embodiment of the dynamically-enlarged photochromic thin film of the present invention, the low refractive medium layer material is at least one of silicon dioxide, aluminum oxide, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride, lithium fluoride polystyrene, polyethylene, polymethyl methacrylate, polyamideimide, polyperfluoroethylpropylene, tetrafluoroethylene, chlorotrifluoroethylene, cellulose propionate, cellulose acetate butyrate, methylpentene polymer, homo-formaldehyde, acrylic resin, cellulose nitrate, ethyl cellulose, polypropylene, polysulfone, polyethersulfone, mica, hetero-isomorphous polymer, polybutene, ionomer, acrylic copolymer, styrene butadiene, polyvinyl chloride, urea-formaldehyde, styrene acrylonitrile, and polycarbonate.
As a preferred embodiment of the dynamically-enlarged photochromic thin film of the present invention, the metal nanoparticles in the metal nanoparticle layer are distributed at intervals from each other; as a more preferable embodiment of the dynamically-amplified photochromic thin film of the present invention, the gap between the metal nanoparticles in the metal nanoparticle layer is 2nm to 1 mm.
As a preferred embodiment of the dynamically-amplified photochromic thin film according to the present invention, the material of the metal nanoparticles is selected from the group consisting of aluminum, silver, gold, copper, platinum, ruthenium, palladium, rhodium, cobalt, iron, nickel, lead, osmium, iridium, and alloys thereof.
As a preferred embodiment of the dynamically amplified photochromic thin film of the present invention, the intense photochromic layer further comprises a reflective layer, and the reflective layer is disposed on the lower surface of the dielectric film stack filter layer; as a more preferred embodiment of the dynamically amplified photochromic thin film of the present invention, the thickness of the reflective layer is greater than 20 nm; as a more preferred embodiment of the dynamically-amplified photochromic thin film of the present invention, the reflective layer is made of a metal material, and the metal material is selected from the group consisting of aluminum, silver, gold, copper, platinum, tin, titanium, palladium, rhodium, niobium, chromium and alloys thereof.
As a preferred embodiment of the dynamically amplified photochromic thin film of the present invention, the intense photochromic layer further comprises a protective layer covering the surface of the metal nanoparticles; as a more preferred embodiment of the dynamically-enlarged photochromic film of the present invention, the material of the protective layer is at least one of polystyrene, polyethylene, polymethyl methacrylate, polyamideimide, polyperfluoroethylpropylene, tetrafluoroethylene, chlorotrifluoroethylene, cellulose propionate, cellulose acetate butyrate, methylpentene polymer, homo-polyoxymethylene, acrylic resin, cellulose nitrate, ethyl cellulose, polypropylene, polysulfone, polyethersulfone, mica, hetero-isomorphous polymer, polybutene, ionomer, acrylic copolymer, thermoplastic, styrene butadiene, polyvinyl chloride, urea formaldehyde, styrene acrylonitrile, polycarbonate, silica, alumina, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, samarium fluoride, neodymium fluoride, barium fluoride, calcium fluoride and lithium fluoride.
As a preferred embodiment of the dynamically-enlarged photochromic thin film of the present invention, the dynamically-enlarged layer and the intense photochromic layer are connected through a transparent adhesive layer.
In a preferred embodiment of the dynamically amplified photochromic film of the present invention, PET, quartz or glass is used as the base material layer in the dynamically amplifying layer.
As a preferred embodiment of the dynamically-magnifying photochromic film of the present invention, each microlens unit of the dynamic magnifying layer has at least one intense photochromic unit in a corresponding region of the intense photochromic layer.
As a preferred embodiment of the dynamically-magnifying photochromic thin film of the present invention, the physical distance from the optical center of the microlens in the dynamic magnifying layer to the metal nanoparticle layer in the intense photochromic layer is consistent with the focal length of the microlens.
As a preferred embodiment of the dynamically amplified photochromic thin film of the present invention, the highlight photochromic units corresponding to adjacent microlens units in the dynamic amplification layer have the same or different metal nanoparticle parameters; as a more preferred embodiment of the dynamically-enlarged photochromic thin film of the present invention, the metal nanoparticle parameters include the kind of material of the particles, the size of the particles, the gap between the particles, and the morphology of the particles.
As a preferred embodiment of the dynamically-magnifying photochromic thin film of the present invention, the highlight color-changing units corresponding to adjacent microlens units in the dynamic magnifying layer have the same or different interference cavity thicknesses.
The dynamic amplified photochromic thin film device is mainly divided into two parts, namely a dynamic amplifying layer and a strong light photochromic layer, and the three-dimensional dynamic effect display of patterns in the plasma structural color device and the optical characteristic of color variable under the irradiation of strong visible light are respectively realized. The dynamic amplification layer comprises a micro-lens array layer and a substrate layer, wherein the substrate layer can be made of a PET material with certain flexibility or one of hard material quartz or glass, and different application requirements can be met. The pattern editing and the highlight color changing functions in the plasma structural color thin film device are realized by the highlight color changing layer, and the color of the thin film can be regulated and controlled by changing the parameters of the size, the gap and the appearance of the metal nano particles or adjusting the thickness of the interference cavity. The strong light color changing units with different structural parameters can realize different strong light color changing color effects. Therefore, the dynamic amplification photochromic film can simultaneously realize the three-dimensional dynamic effect display of the pattern and the optical characteristic that the color of the pattern can be changed under the irradiation of strong visible light, has technical originality and has huge application potential in the fields of dynamic display and anti-counterfeiting.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a dynamically amplified photochromic film according to the present invention.
FIG. 2 is a schematic diagram of a process for preparing the photochromic thin film with dynamic amplification shown in FIG. 1.
Fig. 3 is an SEM topography of Au nanoparticles in the dynamically enlarged photochromic thin film shown in fig. 1.
Fig. 4 is a graph showing the effect of intense light (mobile phone light) discoloration of an intense light-discoloring layer in the dynamically enlarged photochromic film shown in fig. 1.
FIG. 5 is a schematic structural diagram of another embodiment of a dynamically amplified photochromic film according to the present invention.
In fig. 1 and 2, 000 is an imprint template, 101 is a substrate layer, 102 is a metal nanoparticle layer, 103 is a high-refractive-index medium layer, 104 is a low-refractive-index medium layer, and 105 is a reflective layer.
In fig. 5, 200 is a reflective layer, 201 is a low refractive medium layer, 202 is a high refractive medium layer, 203 is a metal nanoparticle layer, 204 is a protective layer, 205 is a transparent adhesive layer, 206 is a substrate layer, and 207 is a microlens array layer.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1
The structure of the dynamically amplified photochromic thin film of the present invention is shown in figure 1, the dynamic amplification photochromic film comprises a dynamic amplification layer and a strong photochromic layer, the dynamic amplification layer comprises a micro-lens array layer 106 and a substrate layer 101, the strong photochromic layer comprises a dielectric film stack filter layer, a metal nanoparticle layer 102 and a reflective layer 105, the dielectric film stack filter layer comprises a high refractive index dielectric layer 103 and a low refractive index dielectric layer 104, the metal nanoparticle layer 102 is located on the surface of the high refractive index medium layer 103, the reflective layer 105 is located on the surface of the low refractive index medium layer 104, namely, the strong photochromic layer sequentially comprises a reflecting layer 105, a low-refractive medium layer 104, a high-refractive medium layer 103 and a metal nanoparticle layer 102, the metal nanoparticle layer 102 of the intense photochromic layer is connected with the substrate layer 101 of the dynamic amplification layer.
The preparation method of the photochromic thin film with dynamic amplification in the embodiment is shown in figure 2, and is implemented under the action of an imprinting template 000 at PPits with certain depth are formed in the surface of the ET substrate layer 101, and different pit depths can be obtained by adjusting steps of an imprinting template mold. And then evaporating an Au nanoparticle layer 102, wherein an SEM topography of the Au nanoparticle layer is shown in FIG. 3, the average size of particles is about 68nm, and the gaps are about 12 nm. Then plating ZrO 2 A high refractive medium layer 103, filling the pits and plating SiO with a certain thickness 2 And (3) a low-refraction medium layer 104, and then an Al reflecting layer 105 with the thickness of 30nm is evaporated to form a strong light discoloring layer. The dynamic color changing effect of one strong light color changing layer is shown in fig. 4, a strong light color changing unit which is purple under ambient light is changed into green under the illumination condition of a mobile phone, and the color change before and after illumination can be further regulated and controlled by adjusting the structural parameters of the strong light color changing unit. And finally, forming a PMMA microlens array layer 106 on the surface of the substrate layer. Under the process flow, the structure of the finally obtained dynamic amplification photochromic film is shown as the attached figure 1.
When the other materials of the present invention are selected from the nanoparticle layer, the high refractive medium layer, the low refractive medium layer, and the like in this embodiment, the obtained dynamically amplified photochromic thin film has similar effects, and details thereof are not repeated herein.
In this embodiment, the strong light color-changing unit with interference cavities of different dielectric thicknesses is manufactured by using a nanoimprint method, and corresponds to a pixel point amplified by the microlens array. The strong light color changing unit is a plasma structural color component, different structural colors can be obtained by regulating the thicknesses of different medium layers, color change can be realized under the irradiation of strong visible light, and a dynamically amplified structural color pattern is formed simultaneously according to the Moire amplification principle by combining a micro lens array.
Example 2
In a structural embodiment of the dynamically amplified photochromic thin film according to the present invention, the structure of the dynamically amplified photochromic thin film is shown in fig. 5, the dynamically amplified photochromic thin film includes a dynamic amplification layer and a strong photochromic layer, the dynamic amplification layer includes a microlens array layer 207 and a substrate layer 206, the strong photochromic layer includes a dielectric film stack filter layer, a metal nanoparticle layer 203, and an inverse photochromic layerThe reflective layer 200 and the protective layer 204, the dielectric film stack filter layer includes a high refractive index dielectric layer 202 and a low refractive index dielectric layer 201, the metal nanoparticle layer 203 is located on the surface of the high refractive index dielectric layer 202, the reflective layer 200 is located on the surface of the low refractive index dielectric layer 201, and the protective layer 204 covers the vegetarian diet
Figure BDA0002905653200000071
The surface of the nanoparticle layer 203, that is, the strong light discoloration layer, sequentially comprises a reflection layer 200, a low-refraction dielectric layer 201, a high-refraction dielectric layer 202, a metal nanoparticle layer 203 and a protection layer 204, and the dynamic amplification layer is connected with the strong light discoloration layer through a transparent adhesive layer.
The preparation method of the dynamically amplified photochromic film in the embodiment comprises the following steps: by utilizing winding coating equipment, firstly plating an Al reflecting layer 200 with the thickness of 30nm, then respectively plating a SiO2 low-refraction dielectric layer 201 and a ZrO2 high-refraction dielectric layer 202, and after evaporating a layer of Au nanoparticle layer 203, remelting and agglomerating metal particles in a local area to grow up by utilizing a laser heating technology to form Au nanoparticles with larger sizes so as to obtain different structural colors. A protective layer 204 of PMMA is then applied to the surface of the metal nanoparticle layer. And finally, combining the PMMA micro-lens array layer 207 with the PET substrate layer 206 and the high light color changing unit head together through a transparent adhesive layer 205 to form the dynamic amplification photochromic film.
The dynamically-amplified photochromic thin film described in this embodiment has similar effects to those of embodiment 1, and when the nanoparticle layer, the high-refractive dielectric layer, the low-refractive dielectric layer, the reflective layer, the protective layer and other materials described in this embodiment are selected from the other materials described in this invention, the obtained dynamically-amplified photochromic thin film has similar effects, which are not described herein again.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (14)

1. A photochromic film with dynamic amplification is characterized in that the film comprises a dynamic amplification layer and a strong light photochromic layer;
the dynamic amplification layer comprises a micro-lens array layer and a substrate layer;
the strong light color changing layer comprises a dielectric film stack filter layer and a metal nano particle layer, and the metal nano particle layer is arranged on the upper surface of the dielectric film stack filter layer;
the metal nanoparticle layer of the strong light discoloring layer is connected with the base material layer of the dynamic amplification layer;
the strong light color changing layer forms a Fabry-Perot interference cavity.
2. The dynamically amplified photochromic film of claim 1, wherein the dielectric film stack filter layer is (aH) 1 bL 1 ) n cH 2 And n is an integer, a is more than or equal to 0, b is less than or equal to 6, and c is more than 0 and less than or equal to 6.
3. The dynamically amplified photochromic film of claim 1 or 2, wherein the dielectric film stack filter layer comprises a high refractive dielectric layer and a low refractive dielectric layer, and the metal nanoparticle layer is on an upper surface of the high refractive dielectric layer; preferably, the material of the high-refractive medium layer is a material with a refractive index greater than 1.65, and the material of the low-refractive medium layer is a material with a refractive index less than or equal to 1.65.
4. The dynamically-amplified photochromic film of claim 3, wherein the material of the high refractive index layer is at least one of lanthanum titanate, trititanium pentoxide, niobium pentoxide, zinc sulfide, zinc oxide, zirconium oxide, titanium dioxide, carbon, indium oxide, indium tin oxide, tantalum pentoxide, cerium oxide, yttrium oxide, europium oxide, iron oxide, triiron tetroxide, hafnium nitride, hafnium carbide, hafnium oxide, lanthanum oxide, magnesium oxide, neodymium oxide, praseodymium oxide, samarium oxide, antimony trioxide, silicon carbide, silicon nitride, silicon monoxide, selenium trioxide, tin oxide, and tungsten trioxide; preferably, the low refractive medium layer material is at least one of silicon dioxide, aluminum oxide, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride, lithium polystyrene fluoride, polyethylene, polymethyl methacrylate, polyamideimide, polyperfluoroethylpropylene, tetrafluoroethylene, chlorotrifluoroethylene, cellulose propionate, cellulose acetate butyrate, methylpentene polymer, homo-formaldehyde, acrylic resin, cellulose nitrate, ethyl cellulose, polypropylene, polysulfone, polyethersulfone, mica, hetero-isomorphous polymer, polybutene, ionomer, acrylic copolymer, styrene butadiene, polyvinyl chloride, urea formaldehyde, styrene acrylonitrile, and polycarbonate.
5. The dynamically amplified photochromic film of claim 1, wherein the metal nanoparticles in the metal nanoparticle layer are spaced apart from one another; preferably, the gaps between the metal nanoparticles in the metal nanoparticle layer are 2nm to 1 mm.
6. The dynamically amplified photochromic thin film of claim 1 or 5, wherein the material of the metallic nanoparticles is selected from the group consisting of aluminum, silver, gold, copper, platinum, ruthenium, palladium, rhodium, cobalt, iron, nickel, lead, osmium, iridium, and alloys thereof.
7. The dynamically amplified photochromic film of claim 1, wherein the intense photochromic layer further comprises a reflective layer disposed on a lower surface of the dielectric stack filter layer; preferably, the thickness of the reflective layer is greater than 20 nm; more preferably, the reflective layer is made of a metal material, and the metal material is selected from aluminum, silver, gold, copper, platinum, tin, titanium, palladium, rhodium, niobium, chromium and alloys thereof.
8. The dynamically amplified photochromic film of claim 1, wherein the intense photochromic layer further comprises a protective layer covering the surface of the metal nanoparticles; preferably, the material of the protective layer is at least one of polystyrene, polyethylene, polymethyl methacrylate, polyamide imide, polyperfluoroethylpropylene, tetrafluoroethylene, chlorotrifluoroethylene, cellulose propionate, cellulose acetate butyrate, methylpentene polymer, homo-formaldehyde, acrylic resin, cellulose nitrate, ethyl cellulose, polypropylene, polysulfone, polyethersulfone, mica, hetero-isomorphous polymer, polybutene, ionomer, acrylic copolymer, thermoplastic, styrene butadiene, polyvinyl chloride, urea formaldehyde, styrene acrylonitrile, polycarbonate, silica, alumina, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride and lithium fluoride.
9. The dynamically amplified photochromic film of claim 1, wherein the dynamically amplifying layer and the photochromic layer are connected by a transparent adhesive layer.
10. The dynamically amplified photochromic film of claim 1, wherein the substrate layer in the dynamically amplifying layer is PET, quartz or glass.
11. The dynamically-magnified photochromic film of claim 1, wherein each microlens element of the dynamic magnifying layer has at least one highlight color element in a corresponding area of the highlight color layer.
12. The dynamically-magnified photochromic film of claim 1, wherein the physical distance from the optical center of the microlenses in the dynamic magnification layer to the layer of metal nanoparticles in the intense photochromic layer is consistent with the focal length of the microlenses.
13. The dynamically-magnified photochromic film of claim 1, wherein the intense photochromic units corresponding to adjacent microlens units in the dynamic magnification layer have the same or different metal nanoparticle parameters; preferably, the metal nanoparticle parameters include the type of material of the particles, the size of the particles, the gaps between the particles, and the morphology of the particles.
14. The dynamically-magnified photochromic film of claim 1, wherein the intense photochromic units corresponding to adjacent microlens units in the dynamic magnification layer have the same or different interference cavity thicknesses.
CN202110072097.7A 2021-01-19 2021-01-19 Photochromic film with dynamic amplification Pending CN114815006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110072097.7A CN114815006A (en) 2021-01-19 2021-01-19 Photochromic film with dynamic amplification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110072097.7A CN114815006A (en) 2021-01-19 2021-01-19 Photochromic film with dynamic amplification

Publications (1)

Publication Number Publication Date
CN114815006A true CN114815006A (en) 2022-07-29

Family

ID=82524512

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110072097.7A Pending CN114815006A (en) 2021-01-19 2021-01-19 Photochromic film with dynamic amplification

Country Status (1)

Country Link
CN (1) CN114815006A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1505668A (en) * 2001-04-27 2004-06-16 �Ʒ� Multi-layered magnetic pigments and foils
CN103576216A (en) * 2012-08-02 2014-02-12 中钞特种防伪科技有限公司 Optical anti-fake element and anti-fake product with same
CN104981356A (en) * 2012-08-03 2015-10-14 苏州苏大维格光电科技股份有限公司 Colored, dynamic, and amplified safety film
US20180239070A1 (en) * 2015-09-04 2018-08-23 President And Fellows Of Harvard College Modifying optical properties of thin film structures using an absorbing element
CN110568534A (en) * 2019-09-10 2019-12-13 中国科学院上海技术物理研究所 structural color nano film with good angle robustness and preparation method thereof
CN110568525A (en) * 2019-08-08 2019-12-13 武汉大学 Color nano printing device based on micro-nano polarizer and F-P cavity structure
CN110667019A (en) * 2019-09-06 2020-01-10 山东大学 Plasma resonance reversible regulation silver nanoparticle film and preparation method and application thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1505668A (en) * 2001-04-27 2004-06-16 �Ʒ� Multi-layered magnetic pigments and foils
CN103576216A (en) * 2012-08-02 2014-02-12 中钞特种防伪科技有限公司 Optical anti-fake element and anti-fake product with same
CN104981356A (en) * 2012-08-03 2015-10-14 苏州苏大维格光电科技股份有限公司 Colored, dynamic, and amplified safety film
US20180239070A1 (en) * 2015-09-04 2018-08-23 President And Fellows Of Harvard College Modifying optical properties of thin film structures using an absorbing element
CN110568525A (en) * 2019-08-08 2019-12-13 武汉大学 Color nano printing device based on micro-nano polarizer and F-P cavity structure
CN110667019A (en) * 2019-09-06 2020-01-10 山东大学 Plasma resonance reversible regulation silver nanoparticle film and preparation method and application thereof
CN110568534A (en) * 2019-09-10 2019-12-13 中国科学院上海技术物理研究所 structural color nano film with good angle robustness and preparation method thereof

Similar Documents

Publication Publication Date Title
Daqiqeh Rezaei et al. Nanophotonic structural colors
EP1862827B1 (en) Nano-structured Zero-order diffractive filter
Gu et al. Color generation via subwavelength plasmonic nanostructures
JP4722353B2 (en) Diffractive surface with color shift background
US10527765B2 (en) Surfaces having structured optical appearances
CN104656170B (en) A kind of broadband light hypersorption device and preparation method thereof
US10155408B2 (en) Optical anti-counterfeiting element, product using same and preparation method therefor
US7821691B2 (en) Zero-order diffractive filter
CN104884265B (en) Multilayer body and method for producing a security element
Jiang et al. Scalable inkjet-based structural color printing by molding transparent gratings on multilayer nanostructured surfaces
CA2938326C (en) Plasmonic optical security component, production of such a component and a secure document equipped with such a component
WO2017092667A1 (en) Optical anti-counterfeiting element and optical anti-counterfeiting product using the optical anti-counterfeiting element
CN104834029B (en) Micro-optical device of double-face imaging and its preparation method and application
CN1666888A (en) Optically variable security devices
CN105549137B (en) A kind of sub-wavelength grate structure is in color component and the colour generation product containing the element
US20220276501A1 (en) Optical products, masters for fabricating optical products, and methods for manufacturing masters and optical products
CA3195166A1 (en) Optical products, masters for fabricating optical products, and methods for manufacturing masters and optical products
Cho et al. Mechanoresponsive scatterers for high-contrast optical modulation
CN113050206B (en) Photochromic material
CN113050204A (en) Micro-lens array substrate, 3D display device and preparation method thereof
KR20100083384A (en) Reflective structure, display apparatus comprising reflective structure and methods of manufacturing reflective structure and display apparatus
CN114815006A (en) Photochromic film with dynamic amplification
US20220334295A1 (en) Magnetic pigment flake, optically variable ink, and anti-falsification article
CN113270037A (en) Graphene super-pixel display, preparation method thereof and graphene super-pixel color display system
Lu et al. Nanomaterials and artificial intelligence in anti-counterfeiting

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination