CN115421227B - Bionic antireflection film structure - Google Patents
Bionic antireflection film structure Download PDFInfo
- Publication number
- CN115421227B CN115421227B CN202211235979.1A CN202211235979A CN115421227B CN 115421227 B CN115421227 B CN 115421227B CN 202211235979 A CN202211235979 A CN 202211235979A CN 115421227 B CN115421227 B CN 115421227B
- Authority
- CN
- China
- Prior art keywords
- main convex
- antireflection film
- annular
- longitudinal section
- convex structure
- 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.)
- Active
Links
Images
Classifications
-
- 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
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of antireflection films, and particularly discloses a novel bionic antireflection film structure, which comprises a base, wherein an antireflection structure is arranged at the top of the base, the antireflection structure is formed by a unit microstructure array, the unit microstructure comprises a main convex structure and an annular structure, the main convex structure is positioned at the central position of the annular structure, the bottom of the main convex structure and the bottom of the annular structure are both arranged at the top of the base, and a gap exists between the main convex structure and the annular structure. The novel bionic antireflection film structure forms a better gradual change optical layer on the surface and the inside of the whole structure and between the annular structure and the main convex structure when the light wave contacts the structure, thereby resisting Fresnel reflection and better reducing reflectivity. The novel bionic anti-reflection film structure has the advantages that the average reflectivity of the wave band in 3-8 um is below 0.5% by utilizing the lower imaginary refractive index of polydimethylsiloxane and the submicron optical characteristics of the structure, and the anti-reflection effect is remarkable.
Description
Technical Field
The invention belongs to the technical field of antireflection films, and particularly relates to a bionic antireflection film structure.
Background
When a light wave enters from one medium to another, an interfacial reflection will occur between the air and the interface formed by the substrate, caused by abrupt changes in the refractive index of the different propagating mediums on either side of the interface. On the one hand, in real life, the reflection of light can bring convenience to us, such as an automobile reflector, a periscope and the like, and the light propagation path is changed by utilizing the reflection phenomenon of the light so as to realize multi-directional observation. However, on the other hand, the reflection of light brings inconvenience and obstruction to us, the reflection of light easily causes reflected light pollution, people are in the environment polluted by the reflected light for a long time, retina and iris can be damaged to different degrees, discomfort such as dizziness and headache occurs, and the physical health of people is affected; the reflection of light causes a large amount of light energy loss, which is disadvantageous for the utilization of light energy. Light energy loss is one of key factors influencing the conversion efficiency of solar cells, currently, silicon-based solar cells are dominant in the photovoltaic market, and due to refractive index mutation at the interface of a silicon surface and air, the surface reflectivity of an untreated silicon-based solar cell can reach 30%, so that how to reduce light reflection loss is a problem to be solved urgently.
The antireflection film is one of effective ways for reducing light reflection loss, and the traditional method is to prepare a plurality of layers of antireflection films on the surface of the battery, but the applicable wave band range is narrow, and the defects of poor adhesive force, instability and the like exist due to the introduction of different materials. The above problems can be avoided by improving the structure of the antireflection film. The structure of the antireflection film in recent years is mainly a pyramid structure, and the antireflection film with the structure is the optical film with the widest application and the largest yield at present. The effect of the solar cell is mainly to reduce the reflection of light by the prism, the lens and the plane mirror, thereby reducing the reflectivity of the elements or reducing the optical pollution in life, and the solar cell can also be used for silicon solar cells and improving the photoelectric conversion efficiency of the solar cells. For the research of the antireflection film, the bionic film is also a new mainstream research field, and the biological structures of the infrared sensors of moth eyes and Jiding beetles are a series of achievements in the aspect of the antireflection film.
The existing antireflection film is mainly divided into new material selection, improved deposition process and new structure design in optimization, and the structure plays a decisive role in antireflection effect of the antireflection film. The structure of the traditional antireflection film is mainly a conical structure, and the flatness of the side surface can influence the reflection effect, so that the antireflection effect is relatively poor. At present, the literature reports that the antireflection effect is better when the side surface structure of the film is a polished surface, and the antireflection effect is mainly concentrated in a near infrared band (0.75-3 mu m); the research on the mid-wave infrared 3-8 um is less, and the antireflection effect of the antireflection film in the wave band needs to be further reduced.
Disclosure of Invention
The invention aims to provide a bionic antireflection film structure which realizes low reflection of 3-8 um medium wave infrared and has remarkable antireflection effect.
In order to achieve the above purpose, the invention provides a bionic anti-reflection film structure, which comprises a base, wherein an anti-reflection structure is arranged at the top of the base, the anti-reflection structure is composed of a unit microstructure array, the unit microstructure comprises a main convex structure and an annular structure, the main convex structure is positioned at the center of the annular structure, the bottom of the main convex structure and the bottom of the annular structure are both arranged at the top of the base, and a gap exists between the main convex structure and the annular structure.
Preferably, in the bionic antireflection film structure, the unit microstructure array is densely arranged in four directions.
Preferably, in the bionic antireflection film structure, a cross section of the main convex structure is circular, a longitudinal section of the main convex structure is semi-elliptical, and the longitudinal section of the main convex structure is at a height t 1 Width r of the part 1 (t 1 ) The following conditions are satisfied:
wherein S is 1 Is the width of the bottom of the longitudinal section of the main convex structure, L 1 Is the total height of the main convex structure.
Preferably, in the bionic antireflection film structure, a cross section of the annular structure is a ring, a longitudinal section of the annular structure is a semi-ellipse, and the longitudinal section of the annular structure is at a height t 2 Width r of the part 2 (t 2 ) The following conditions are satisfied:
wherein S is 2 Is the bottom width of the longitudinal section of the annular structure, L 2 Is the total height of the annular structure.
Preferably, in the bionic antireflection film structure, the total height L of the main convex structure 1 Is 1.7-2.6 μm, the bottom width S of the longitudinal section of the main convex structure 1 0.4-0.6 mu m.
Preferably, in the bionic antireflection film structure, the total height L of the main convex structure 1 At a bottom width S of 2.3 μm of a longitudinal section of the main convex structure 1 0.55 μm.
Preferably, in the bionic antireflection film structure, the total height L of the annular structure 2 A bottom width S of a longitudinal section of the annular structure of 1.3-1.5 μm 2 0.7-1.0 μm.
Preferably, in the bionic antireflection film structure, the total height L of the annular structure 2 A bottom width S of a longitudinal section of the annular structure of 1.4 μm 2 0.875 μm.
Preferably, in the bionic antireflection film structure, the width of the bottom surface of the unit microstructure is 3-3.5 μm.
Preferably, in the bionic anti-reflection film structure, the material of the base and the unit microstructure is polydimethylsiloxane or silicon dioxide.
Preferably, in the bionic anti-reflection film structure, the material of the base and the unit microstructure is polydimethylsiloxane.
Compared with the prior art, the invention has the following beneficial effects:
the bionic antireflection film structure is composed of the main convex structure and the annular structure, wherein the unit microstructures are closely distributed, and a better gradual change optical layer is formed on the surface and the inside of the whole structure and in gaps between the annular structure and the main convex structure when light waves contact the structure, so that Fresnel reflection is resisted, and the reflectivity is reduced better. The bionic anti-reflection film structure has the advantages that the average reflectivity of the wave band in 3-8 um is below 0.5% by utilizing the lower imaginary refractive index of polydimethylsiloxane and the submicron optical characteristic of the structure, and the anti-reflection effect is obvious. The bionic antireflection film structure can be applied to a camera lens, improves imaging capability, can be applied to optical devices such as a military night vision device, a camera lens and the like and silicon-based solar cells, and can reduce reflection interference, reflection loss and the like.
Drawings
FIG. 1 is a schematic structural diagram of a bionic antireflection film structure of the present invention.
Fig. 2 is a front view of a bionic antireflection film structure of the present invention.
Fig. 3 is a schematic structural diagram of a unit microstructure in the bionic anti-reflection film structure of the present invention.
Fig. 4 is a top view of the unit microstructure in the bionic anti-reflection film structure of the present invention.
Fig. 5 is a schematic longitudinal section view of a unit microstructure in the bionic antireflection film structure of the present invention.
FIG. 6 is a graph of reflectance of a biomimetic anti-reflective film structure of the present invention.
The main reference numerals illustrate:
1-main convex structure, 2-annular structure, 3-base, 4-antireflection structure.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments. In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The terms "first," "second," "third," and the like, if any, are used for descriptive purposes only and for distinguishing between technical features and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Example 1
As shown in fig. 1 to 5, a bionic anti-reflection film structure comprises a base 3 and an anti-reflection structure 4, wherein the anti-reflection structure 4 is arranged at the top of the base 3, the anti-reflection structure 4 is formed by an array of unit microstructures, and the unit microstructures are distributed in a close-packed square manner; the unit microstructure is composed of a main convex structure 1 and a ring-shaped structure 2, wherein the main convex structure 1 is positioned at the right center of the ring-shaped structure 2. The cross section of the main convex structure 1 is circular, the longitudinal section 2 is semi-elliptical, and the longitudinal section of the main convex structure 1 is at the height t 1 Where (a)Width r 1 (t 1 ) The following conditions are satisfied:
wherein S is 1 Is the bottom width of the longitudinal section of the main convex structure 1, L 1 Is the total height of the main convex structure 1. The cross section of the annular structure 2 is a ring, the longitudinal section of the annular structure 2 is a semi-ellipse, and the longitudinal section of the annular structure 2 is at the height t 2 Width r of the part 2 (t 2 ) The following conditions are satisfied: />
Wherein S is 2 Is the bottom width of the longitudinal section of the annular structure 2, L 2 Is the total height of the ring structure 2.
The total height L of the main convex structure 1 in this embodiment 1 Bottom width S of longitudinal section of 2.3 μm 1 0.55 μm; total height L of annular structure 2 2 Bottom width S of longitudinal section of 1.4 μm 2 0.875 μm; the bottom width S of the cell microstructure was 3.5 μm. The material of the base and the unit microstructure is polydimethylsiloxane.
The reflectance curve of the bionic anti-reflection film structure of this embodiment was obtained by analyzing the anti-reflection performance of the bionic anti-reflection film structure in the 3-8 μm band using COMSOL, as shown in fig. 6. The average reflectivity of the bionic antireflection film structure under the irradiation of infrared light of 3-8 um is only 0.278%, the maximum difference of the reflectivity is 0.692%, the reflectivity curve is relatively more stable, and the antireflection effect is obvious.
Example 2
This example is different from example 1 in that the bottom surface width S of the unit microstructure is 3.0 μm.
Comparative example 1
This comparative example is the same as example 1, except that the main convex structure 1 has an overall height L 1 1.1 μm.
Comparative example 2
This comparative example is different from example 1 in that the bottom surface width S of the unit microstructure is 4.0 μm.
The reflection performance data of the antireflection film structures of examples 1 to 2 and comparative examples 1 to 2 are shown in table 1, and it can be seen from table 1 that the average reflectance and the maximum reflectance difference of the antireflection film structures of the examples of the present invention are lower than those of the comparative example group, which indicates that the bionic antireflection film structure of the present invention has excellent overall antireflection effect.
Table 1 reflective properties of the antireflective film structures of examples and comparative examples
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. The bionic antireflection film structure is characterized by comprising a base (3), wherein an antireflection structure (4) is arranged at the top of the base (3), the antireflection structure (4) is formed by a unit microstructure array, the unit microstructure comprises a main convex structure (1) and an annular structure (2), the main convex structure (1) is positioned at the central position of the annular structure (2), the bottoms of the main convex structure (1) and the annular structure (2) are both arranged at the top of the base (3), and a gap exists between the main convex structure (1) and the annular structure (2); the cross section of the main convex structure (1) is circular, the longitudinal section is semi-elliptical, and the longitudinal section of the main convex structure (1) is at the heightt 1 Width of the placer 1 (t 1 )The following conditions are satisfied:
whereinS 1 Is the width of the bottom of the longitudinal section of the main convex structure,L 1 is the total height of the main convex structure; the cross section of the annular structure (2) is a circular ring, the longitudinal section is a semi-ellipse, and the longitudinal section is at the height t 2 Width of the placer 2 (t 2 )The following conditions are satisfied: />
WhereinS 2 Is the bottom width of the longitudinal section of the annular structure (2),L 2 is the total height of the annular structure (2).
2. The biomimetic antireflection film structure of claim 1, wherein the array of unit microstructures adopts a close-packed tetragonal arrangement.
3. A biomimetic antireflection film structure according to claim 1, characterized in that the total height of the main convex structure (1)L 1 Is 1.7-2.6 mu m, and the bottom width of the longitudinal section of the main convex structure (1)S 1 0.4 to 0.6 μm.
4. A biomimetic antireflection film structure according to claim 3, characterized in that the total height of the main convex structure (1)L 1 Is 2.3 μm, the bottom width of the longitudinal section of the main convex structure (1)S 1 0.55 μm.
5. A biomimetic antireflection film structure according to claim 1, characterized in that the overall height of the annular structure (2)L 2 1.3-1.5 μm, the bottom width of the longitudinal section of the annular structure (2)S 2 0.7 to 1.0 μm.
6. A biomimetic antireflection film structure according to claim 5, characterized in that the overall height of the annular structure (2)L 2 Is 1.4 μm, the bottom width of the longitudinal section of the annular structure (2)S 2 0.875 μm.
7. The bionic antireflection film structure of claim 1, wherein the unit microstructure has a bottom width of 3-3.5 μm.
8. The bionic antireflection film structure according to claim 1, wherein the material of the base (3), unit microstructure is polydimethylsiloxane or silica.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235979.1A CN115421227B (en) | 2022-10-08 | 2022-10-08 | Bionic antireflection film structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235979.1A CN115421227B (en) | 2022-10-08 | 2022-10-08 | Bionic antireflection film structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115421227A CN115421227A (en) | 2022-12-02 |
| CN115421227B true CN115421227B (en) | 2023-06-13 |
Family
ID=84206172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211235979.1A Active CN115421227B (en) | 2022-10-08 | 2022-10-08 | Bionic antireflection film structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115421227B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390305A (en) * | 2017-07-21 | 2017-11-24 | 江西师范大学 | The full light absorber structure of double frequency-band |
| CN108710164A (en) * | 2018-05-25 | 2018-10-26 | 中国科学院上海光学精密机械研究所 | Ultra-wideband anti-reflection micro-structure and preparation method thereof |
| CN109270606A (en) * | 2018-10-08 | 2019-01-25 | 桂林电子科技大学 | A method of dynamic multifocal super lens are constructed based on medium and graphene |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8325420B2 (en) * | 2009-11-24 | 2012-12-04 | Massachusetts Institute Of Technology | Annular solid immersion lenses and methods of making them |
| GB201802497D0 (en) * | 2018-02-15 | 2018-04-04 | Univ Southampton | Nanostructured optical element,method for fabrication and uses thereof |
| JP2022056710A (en) * | 2020-09-30 | 2022-04-11 | デクセリアルズ株式会社 | Optical film and method for manufacturing optical film |
| CN112505808B (en) * | 2020-12-09 | 2021-10-08 | 华中科技大学 | Long-wave infrared broadband achromatic super-surface lens |
| CN113504585A (en) * | 2021-07-29 | 2021-10-15 | 合肥工业大学 | Polarization-independent superlens |
-
2022
- 2022-10-08 CN CN202211235979.1A patent/CN115421227B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390305A (en) * | 2017-07-21 | 2017-11-24 | 江西师范大学 | The full light absorber structure of double frequency-band |
| CN108710164A (en) * | 2018-05-25 | 2018-10-26 | 中国科学院上海光学精密机械研究所 | Ultra-wideband anti-reflection micro-structure and preparation method thereof |
| CN109270606A (en) * | 2018-10-08 | 2019-01-25 | 桂林电子科技大学 | A method of dynamic multifocal super lens are constructed based on medium and graphene |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115421227A (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2702658T3 (en) | Solar photovoltaic module | |
| KR100942192B1 (en) | Assembly comprising a textured transparent panel and an element capable of collecting or emitting light, and transparent panel | |
| EP3129811B1 (en) | Infrared transmitting cover sheet | |
| WO2017107783A1 (en) | Self-cleaning reflection reduction film and method of preparing same | |
| CN101431115A (en) | Solar cell panel and manufacturing method thereof | |
| CN203747745U (en) | High light-concentrated solar lighting module group | |
| JP2013061149A (en) | Thin film solar concentrator/collector | |
| CN110320663B (en) | Ultra-small-size large-bandwidth mode filter designed based on direct binary search algorithm | |
| TWI453927B (en) | Multi-reflection structure and photo-electric device | |
| WO2023093118A1 (en) | Telecentric lens and laser radar transmitting and receiving system comprising same | |
| CN115421227B (en) | Bionic antireflection film structure | |
| US8415554B2 (en) | Metamaterial integrated solar concentrator | |
| CN101728445A (en) | Solar battery with macromolecular multilayer film and manufacturing method thereof | |
| CN103353626B (en) | Three dimensional grating anti-reflection structure and components and parts | |
| CN116676002A (en) | Self-repairing super-hydrophobic anti-reflection coating and coating | |
| CN108768284B (en) | Cruise unmanned aerial vehicle solar electric power system based on compound eye structure | |
| CN213338084U (en) | Flat lens element | |
| CN216670309U (en) | Supersurface optical device and optical apparatus with tilted nanostructure elements | |
| CN102681047A (en) | Composite-structure Fresnel lens | |
| CN102955262B (en) | Myopia glasses lenses | |
| CN112582495A (en) | Infrared enhanced silicon-based photoelectric detector | |
| CN111725342A (en) | High-absorptivity photovoltaic module | |
| CN2606363Y (en) | Long-focus fresnel lens | |
| CN219913518U (en) | Solar absorber based on cross structure array | |
| TWM447501U (en) | Optical structure with both anti-reflective and light condensing functions |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |