CN113820762A - Anti-dazzle ultralow reflectivity apron - Google Patents
Anti-dazzle ultralow reflectivity apron Download PDFInfo
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- CN113820762A CN113820762A CN202110872677.4A CN202110872677A CN113820762A CN 113820762 A CN113820762 A CN 113820762A CN 202110872677 A CN202110872677 A CN 202110872677A CN 113820762 A CN113820762 A CN 113820762A
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- optical film
- film layer
- layer
- cover plate
- antiglare
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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
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
Abstract
The invention discloses an anti-dazzle ultra-low reflectivity cover plate, which comprises a cover plate substrate, and an optical matching layer, an anti-dazzle layer and an anti-reflection film layer which are sequentially arranged on the cover plate substrate, wherein the optical matching layer comprises: the first optical film layer is arranged on the cover plate substrate, the refractive index is larger than that of the anti-dazzle layer, the thickness of the first optical film layer is set according to Maxwell equation sets, and the reflectivity between the cover plate substrate and the anti-dazzle layer is reduced through the first optical film layer. According to the invention, according to the classical thin film optical interference theory, the reflectivity between the cover plate substrate and the anti-glare layer can be reduced to be close to 0 by arranging the optical matching layer, so that the overall reflectivity of the cover plate can reach about 0.4%, and the reflectivity of the cover plate is effectively reduced.
Description
Technical Field
The invention relates to the technical field of anti-dazzle cover plates, in particular to an anti-dazzle ultralow-reflectivity cover plate.
Background
Cover panels for use in vehicular items (e.g., rear or interior mirrors, vehicular display devices, etc.) often require surfaces that have anti-glare and anti-reflection effects for safety reasons. At present, the cover plate is manufactured by manufacturing an anti-glare layer on a cover plate substrate, and then manufacturing a thin film antireflection layer on the anti-glare layer, as shown in fig. 1, so that the reflectivity of the cover plate is reduced to below 0.6%.
However, when the cover plate is manufactured in the above manner, the refractive index between the cover plate substrate and the antiglare layer is not matched, so that the reflectivity exists between the cover plate substrate and the antiglare layer, and the reflectivity is about 0.2%. And the upper surface of the anti-reflective layer has a reflectivity of about 0.4%. Thus, the minimum reflectance of the cover plate is only about 0.6%, and it is difficult to achieve 0.5% or less, and the total reflectance of the cover plate is high.
Disclosure of Invention
The invention discloses an anti-dazzle ultralow-reflectivity cover plate which is used for solving the problem that the reflectivity of the cover plate is high in the prior art.
In order to solve the problems, the invention adopts the following technical scheme:
the utility model provides an anti-dazzle ultra-low reflectivity apron, includes the apron substrate and establishes in proper order at the optical matching layer, anti-dazzle layer and the antireflection rete of apron substrate, wherein the optical matching layer includes:
the first optical film layer is arranged on the cover plate substrate, the refractive index of the first optical film layer is larger than that of the anti-dazzle layer, the thickness of the first optical film layer is set according to Maxwell equation set, and the reflectivity between the cover plate substrate and the anti-dazzle layer is reduced through the first optical film layer.
Optionally, the refractive index of the first optical film layer is greater than the refractive index of the antiglare layer by 0.05 to 1.
Optionally, if the difference between the refractive index of the first optical film layer and the refractive index of the anti-glare layer is less than 0.1, the optical matching layer is a layer of the first optical film layer.
Optionally, the first optical film layer is made of silicon oxide.
Optionally, the optical matching layer further includes a second optical film layer having a refractive index smaller than that of the anti-glare layer, wherein the first optical film layer and the second optical film layer are alternately disposed, the first optical film layer is in contact with the cover substrate and the anti-glare layer, the first optical film layer and the second optical film layer have thicknesses and film layer numbers set according to maxwell's equations, and the first optical film layer and the second optical film layer jointly reduce the reflectivity between the cover substrate and the anti-glare layer.
Optionally, the refractive index of the second optical film layer is 0.2-1 less than the refractive index of the first optical film layer.
Optionally, if the difference between the refractive index of the first optical film layer and the refractive index of the anti-glare layer is greater than 0.2, the total number of the first optical film layer and the second optical film layer is greater than or equal to 5.
Optionally, the thickness of each first optical film layer is smaller than the thickness of each second optical film layer.
Optionally, if the difference between the refractive index of the first optical film layer and the refractive index of the anti-glare layer is less than 0.1, the total number of the first optical film layer and the second optical film layer is 3.
Optionally, the thickness of the first optical film layer and the thickness of the second optical film layer are gradually reduced along the direction from the cover substrate to the antiglare layer.
Optionally, the first optical film layer is made of silicon oxide, aluminum oxide, silicon nitride, or niobium oxide.
Optionally, the second optical film layer is made of MgF 2.
Optionally, the anti-glare layer is silicon oxide provided with a doping material, wherein the refractive index of the doping material is smaller than that of the silicon oxide.
Optionally, the cover plate substrate is made of glass.
The technical scheme adopted by the invention can achieve the following beneficial effects:
according to the classical thin film optical interference theory, the reflectivity between the cover plate substrate and the anti-glare layer can be reduced to be close to 0 by arranging the optical matching layer, so that the overall reflectivity of the cover plate can reach about 0.4%, and the reflectivity of the cover plate is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof illustrate the present invention and do not constitute a limitation of the present invention. In the drawings:
FIG. 1 is a schematic structural diagram of a cover plate disclosed in the prior art;
FIG. 2 is a schematic structural diagram of a cover plate according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first structure of an optical matching layer according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of a second structure of the optical matching layer disclosed in the embodiment of the present invention.
Wherein the following reference numerals are specifically included in figures 1-4:
a cover substrate-1; an optical matching layer-2; anti-glare layer-3; anti-reflection film layer-4; a first optical film layer-21; a second optical film layer-22.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The anti-glare ultralow-reflectivity cover plate can be applied to vehicle-mounted items such as vehicle-mounted display equipment, an external rearview mirror or an internal rearview mirror. As shown in fig. 2, the cover plate includes a cover plate substrate 1, and an optical matching layer 2, an antiglare layer 3, and an antireflection film layer 4, which are sequentially disposed on the cover plate substrate 1. The cover substrate 1 is preferably glass having a refractive index of about 1.52 to reduce cost. The anti-reflection film layer 4 can be a multi-film anti-reflection film. The optical matching layer 2 comprises a first optical film layer 21 arranged between the cover plate substrate 1 and the anti-glare layer 3, the refractive index of the first optical film layer 21 is larger than that of the anti-glare layer 3, the thickness of the first optical film layer 21 is set according to Maxwell's equations, and the reflectivity between the cover plate substrate 1 and the anti-glare layer 3 is reduced by the first optical film layer 21, so that the overall reflectivity of the cover plate can reach 0.014% or even lower, and the reflectivity of the cover plate is effectively reduced. The process of calculating the thickness of the first optical film 21 according to maxwell's equations is the same as the conventional process, and is not described in detail herein.
In addition, the optical matching layer 2 may further include a second optical film layer 22, and the refractive index of the second optical film layer 22 is smaller than that of the antiglare layer 3. The first optical film layers 21 and the second optical film layers 22 are alternately arranged, the first optical film layers 21 are in contact with the cover plate substrate 1 and the anti-glare layer 3, the thicknesses and the film layer numbers of the first optical film layers 21 and the second optical film layers 22 are set according to Maxwell equation sets, and the first optical film layers 21 and the second optical film layers 22 jointly reduce the reflectivity between the cover plate substrate 1 and the anti-glare layer 3, so that the overall reflectivity of the cover plate can reach 0.0053% or even lower, and the reflectivity of the cover plate is effectively reduced. The process of calculating the thicknesses and the number of film layers of the first optical film layer 21 and the second optical film layer 22 according to maxwell's equations is the same as the conventional process, and will not be described in detail herein.
To achieve the above object, the first optical film layer 21 and the second optical film layer 22 may be arranged in various ways, and the configuration of each part will be described in detail below by taking a specific embodiment as an example.
The refractive index of the first optical film layer 21 is 0.05-1 greater than that of the antiglare layer 3 to reduce fresnel effect. When the optical matching layer 2 includes only the first optical film layer 21 and does not include the second optical film layer 22, the difference between the refractive index of the first optical film layer 21 and the refractive index of the antiglare layer 3 is less than 0.1. The material of the first optical film layer 21 is preferably silicon oxide (SiO 2). The thickness of the first optical film layer 21 may be 75-80nm at this time. By the arrangement, the reflectivity of the cover plate can reach about 0.014%, and the requirement of low reflectivity is basically met; and the structure is simple and the cost is low.
When the optical matching layer 2 includes the first optical film layer 21 and the second optical film layer 22, the refractive index of the second optical film layer 22 is smaller than the refractive index of the first optical film layer 21 by 0.2 to 1. Further, when the refractive index of the first optical film layer 21 is greater than the refractive index of the antiglare layer 3 by 0.2, the total number of layers of the first optical film layer 21 and the second optical film layer 22 is greater than or equal to 5. And the thickness of each first optical film layer 21 is smaller than that of each second optical film layer 22. In one example, as shown in fig. 4, the first optical film layer 21 is made of aluminum oxide, and the second optical film layer 22 is made of magnesium fluoride. Alumina of about 8.5nm, magnesium fluoride of about 36nm, alumina of about 22.5nm, magnesium fluoride of about 58nm, and alumina of about 10nm are sequentially arranged from the cover substrate 1 to the antiglare layer 3. The arrangement enables the reflectivity of the cover plate to reach 0.0012 percent and be basically ignored; and the overall thickness of the optical matching layer 2 is the lowest.
When the refractive index of the first optical film layer 21 is smaller than the refractive index of the antiglare layer 3 by 0.1, the total number of layers of the first optical film layer 21 and the second optical film layer 22 is 3. In one example, as shown in fig. 3, the first optical film layer 21 is made of silicon oxide, and the second optical film layer 22 is made of magnesium fluoride. In the direction from the cover substrate 1 to the antiglare layer 3, silicon oxide of about 105nm, magnesium fluoride of about 39nm, and silicon oxide of about 19nm were arranged in this order. The arrangement enables the reflectivity of the cover plate to reach 0.0053 percent and be basically ignored; and the overall thickness of the optical matching layer 2 is the lowest.
In another example, the material of the first optical film layer 21 may be silicon nitride, niobium oxide, or the like. No matter what the material of the first optical film 2 and the second optical film 22 is, the first optical film 21 and the second optical film 22 are made by vacuum sputtering.
No matter how the optical matching layer 2 is arranged, the anti-glare layer 3 is made of silicon oxide with a doping material, wherein the refractive index of the doping material is smaller than that of the silicon oxide, so that the refractive index of the anti-glare layer 3 is about 1.4, and the anti-glare layer 3 achieves a better anti-glare effect.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. An anti-dazzle ultra-low reflectivity cover plate is characterized by comprising a cover plate substrate, and an optical matching layer, an anti-dazzle layer and an anti-reflection film layer which are sequentially arranged on the cover plate substrate, wherein the optical matching layer comprises:
the first optical film layer is arranged on the cover plate substrate, the refractive index of the first optical film layer is larger than that of the anti-dazzle layer, the thickness of the first optical film layer is set according to Maxwell equation set, and the reflectivity between the cover plate substrate and the anti-dazzle layer is reduced through the first optical film layer.
2. The antiglare ultra-low reflectance cover sheet of claim 1, wherein the refractive index of the first optical film layer is from 0.05 to 1 greater than the refractive index of the antiglare layer.
3. The antiglare ultra-low reflectance cover sheet of claim 2, wherein the optical matching layer comprises only the first optical film layer, and the difference between the refractive index of the first optical film layer and the refractive index of the antiglare layer is less than 0.1.
4. The cover plate of claim 2, wherein the first optical film layer is made of silicon oxide.
5. The antiglare ultra-low reflectance cover sheet according to claim 2, wherein the optical matching layer further comprises a second optical film layer having a refractive index smaller than that of the antiglare layer, wherein the first optical film layer and the second optical film layer are alternately arranged, the first optical film layer is in contact with the cover substrate and the antiglare layer, and the first optical film layer and the second optical film layer have thicknesses and film layer numbers set according to maxwell's equations, and the reflectance between the cover substrate and the antiglare layer is reduced by the first optical film layer and the second optical film layer together.
6. The antiglare ultra-low reflectance cover sheet of claim 5, wherein the refractive index of the second optical film layer is 0.2 to 1 less than the refractive index of the first optical film layer.
7. The antiglare ultra-low reflectance cover sheet of claim 6, wherein the difference between the refractive index of the first optical film layer and the refractive index of the antiglare layer is greater than 0.2, the total number of layers of the first optical film layer and the second optical film layer is greater than or equal to 5.
8. The antiglare ultra-low reflectance cover sheet of claim 7, wherein each of the first optical film layers has a thickness less than a thickness of each of the second optical film layers.
9. The antiglare ultra-low reflectance cover sheet of claim 6, wherein the difference between the refractive index of the first optical film layer and the refractive index of the antiglare layer is less than 0.1, the total number of layers of the first optical film layer and the second optical film layer is 3.
10. The antiglare ultra-low reflectance cover sheet according to claim 9, wherein the thickness of each of the first optical film layer and the second optical film layer is gradually reduced in antiglare direction along the cover substrate to the antiglare layer.
11. The anti-glare ultra-low reflectivity cover plate according to any one of claims 5 to 10, wherein the first optical film layer is made of silicon oxide, aluminum oxide, silicon nitride or niobium oxide.
12. The anti-glare ultra-low reflectivity cover plate of claim 11, wherein the second optical film layer is MgF 2.
13. The anti-glare ultra-low reflectivity cover plate of claim 12, wherein the anti-glare layer is silicon oxide provided with a doped material, wherein the refractive index of the doped material is less than that of the silicon oxide.
14. The anti-glare ultra-low reflectivity cover plate according to any one of claims 1 to 10, wherein the cover plate substrate is made of glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110872677.4A CN113820762A (en) | 2021-07-30 | 2021-07-30 | Anti-dazzle ultralow reflectivity apron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110872677.4A CN113820762A (en) | 2021-07-30 | 2021-07-30 | Anti-dazzle ultralow reflectivity apron |
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| Publication Number | Publication Date |
|---|---|
| CN113820762A true CN113820762A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110872677.4A Pending CN113820762A (en) | 2021-07-30 | 2021-07-30 | Anti-dazzle ultralow reflectivity apron |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205112587U (en) * | 2015-10-28 | 2016-03-30 | 汕头市东通光电材料有限公司 | Anti -dazzle cell -phone conductive thin film |
| CN105446513A (en) * | 2014-08-21 | 2016-03-30 | 宸鸿科技(厦门)有限公司 | Composite substrate structure and touch device |
| CN106443861A (en) * | 2016-11-15 | 2017-02-22 | 信利光电股份有限公司 | Optical film and touch display screen |
| CN207082090U (en) * | 2017-06-06 | 2018-03-09 | 天津宝兴威科技股份有限公司 | A kind of touch-screen transmission increasing anti-dazzle anti-fingerprint film |
| CN209132452U (en) * | 2018-10-29 | 2019-07-19 | 信利光电股份有限公司 | A kind of multifunctional cover plate |
| CN112694847A (en) * | 2020-12-10 | 2021-04-23 | 安徽胜利精密制造科技有限公司 | Film with anti-dazzle, subtract reflection and prevent fingerprint |
-
2021
- 2021-07-30 CN CN202110872677.4A patent/CN113820762A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105446513A (en) * | 2014-08-21 | 2016-03-30 | 宸鸿科技(厦门)有限公司 | Composite substrate structure and touch device |
| CN205112587U (en) * | 2015-10-28 | 2016-03-30 | 汕头市东通光电材料有限公司 | Anti -dazzle cell -phone conductive thin film |
| CN106443861A (en) * | 2016-11-15 | 2017-02-22 | 信利光电股份有限公司 | Optical film and touch display screen |
| CN207082090U (en) * | 2017-06-06 | 2018-03-09 | 天津宝兴威科技股份有限公司 | A kind of touch-screen transmission increasing anti-dazzle anti-fingerprint film |
| CN209132452U (en) * | 2018-10-29 | 2019-07-19 | 信利光电股份有限公司 | A kind of multifunctional cover plate |
| CN112694847A (en) * | 2020-12-10 | 2021-04-23 | 安徽胜利精密制造科技有限公司 | Film with anti-dazzle, subtract reflection and prevent fingerprint |
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Application publication date: 20211221 |