CN204331079U - Antifogging self-cleaning optical mirror - Google Patents

Abstract

The anti-fog self-cleaning optical mirror includes a substrate and a film layer covering the surface of the substrate. , silicon dioxide film layer and anti-fog self-cleaning coating. The self-cleaning coating is a waterproof chemical layer. The waterproof chemical layer adopts a polymer with N-perfluorooctylsulfonamidopropyltriethoxysilane as the main raw material. The protective film layer used in the utility model is very thin, and the old film is easy to remove when re-coating; the ion-assisted film-forming process can be used to achieve low-temperature coating, which can be used for resin lenses; the film-forming structure of the material is stable, and it is the most commonly used coating film material; Water repellent (fluorosilicon compound) is used as a self-cleaning coating, which does not affect the spectral performance; only four layers of film can achieve a high reflection effect with anti-fog and self-cleaning, and has excellent environmental adaptability.

Description

Anti-fog self-cleaning optical mirror

technical field

The utility model belongs to the field of optical film reflectors and relates to an anti-fog self-cleaning optical reflector.

Background technique

An optical mirror is an optical component that works using the laws of reflection. Mirrors can be divided into plane mirrors, spherical mirrors and aspheric mirrors according to their surface shape; according to the degree of reflection, they can be divided into total reflection mirrors and semi-transparent mirrors (also known as beam splitters). In the past, when manufacturing reflectors, aluminum was often coated on glass. The standard manufacturing process is: after vacuum evaporation of aluminum on a highly polished substrate, it is then coated with silicon dioxide or magnesium fluoride. The operating frequency band of this kind of optical mirror element is very wide, and it can cover the ultraviolet region, visible light region and infrared region, so its application range is very wide.

Optical mirrors are widely used in outdoor environments, such as large-scale reflective astronomical telescopes, reflective concentrating photovoltaic systems, etc. Their porous structures are easy to adhere to oil and absorb environmental moisture, resulting in a decrease in reflectivity and greatly affecting the environmental stability of the product. Therefore, it is necessary to solve the deficiencies of existing reflectors, and to modify the reflective film by liquid non-wetting, so that the reflective film also has the performance of anti-wetting by liquid, that is, the so-called "anti-fog self-cleaning" performance.

The general reflector structure is: SiO2—Al—SiO2 (SiO), a lower base film composed of silicon dioxide is set between the substrate and the Al film, and a SiO2 or SiO film is formed on the Al film, and the SiO2 or SiO film layer is used as protective film.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide an anti-fog self-cleaning coating, which can ensure that the optical mirror has high reflectivity in the ultraviolet, visible and infrared bands after coating, suitable for Optical mirrors for outdoor applications.

The utility model is achieved through the following technical solutions:

An anti-fog self-cleaning optical mirror, including a substrate and a film layer covering the surface of the substrate, is characterized in that the film layer is formed by stacking four layers of films, which are silicon dioxide layer, aluminum layer film, silica film and anti-fog self-cleaning coating.

The self-cleaning coating is a waterproof medicine layer.

The waterproofing layer uses a polymer with N-perfluorooctylsulfonamidopropyl triethoxysilane as the main raw material (reference application number is 200610091094.3, patent titled "Preparation Method of Superhard Waterproofing Chemical for Spectacle Lens").

Wherein, the lowermost layer is a silicon dioxide layer, which is in contact with the surface of the substrate. The base film layer between the aluminum film and the substrate is a silicon dioxide layer, which is used to enhance the connection strength between the aluminum film and the substrate, and the film layer between the aluminum film and the anti-fog self-cleaning coating is a silicon dioxide film layer. The outermost layer is an anti-fog self-cleaning coating. The aforementioned substrate can be an optical glass lens or a resin lens.

In the above-mentioned four-layer film, the thickness of each film layer is respectively:

The thickness of the first layer (silicon dioxide layer) is 10nm;

The thickness of the second layer (aluminum film layer) is 100nm;

The thickness of the third layer (silicon dioxide film layer) is 10nm;

The fourth layer (anti-fog self-cleaning coating) has a thickness of 10nm.

Compared with the prior art, the utility model has the following advantages: the protective film layer is very thin, and the old film is easy to remove when re-coating; the ion-assisted film-forming process can realize low-temperature coating and can be used for resin lenses; the material is film-forming The structure is stable, and it is the most commonly used coating film material; the utility model uses waterproof medicine (fluorosilicon compound) as the self-cleaning coating, which does not affect the spectral performance; only four layers of film can realize high reflection with anti-fog self-cleaning effect, with excellent environmental adaptability.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a curve diagram of the spectral characteristic of the utility model.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

Embodiment 1, an anti-fog self-cleaning optical mirror, comprising an optical element and four layers of film layers covering the surface of the optical element, the four layers of film layers are silicon dioxide layer, aluminum layer, Silica layer and self-cleaning coating.

The thickness of the silicon dioxide layer is 10nm, the thickness of the aluminum layer is 100nm, the thickness of the silicon dioxide layer is 10nm, and the self-cleaning coating is 10nm.

The substrate is glass or resin lens.

The self-cleaning coating is waterproof medicine.

The waterproofing agent is a polymer made of N-perfluorooctylsulfonamidopropyltriethoxysilane as the main raw material. The reference application number is 200610091094.3, and the patent name is "Preparation Method of Superhard Waterproofing Agent for Spectacle Lens".

As shown in Figure 1, the utility model includes an optical element 0 and a film layer covering the surface of the optical element, wherein the film layer is formed by stacking four layers of films, wherein 1 and 3 are silicon oxide film layers, and 2 is The refractive index of the aluminum film layer and the silicon oxide film layer are close to glass, and the structure is stable. It is the most commonly used low-refractive index film material. The utility model uses silicon oxide as the base layer of the substrate and the aluminum film, and adopts an ion-assisted coating process. It can effectively increase the connection strength of the film layer.

The material and thickness of each film layer are as follows:

layer number Film material name Film thickness (unit: nm) 1 silica 10 2 aluminum 100 3 silica 10 4 waterproof medicine 10

As shown in Figure 2, the spectral characteristics of the anti-fog self-cleaning optical mirror described in the utility model are: the average reflection efficiency of 200-1000nm is better than 89%, and the average reflection efficiency of 200-1000nm is better than 89% in the scope of incident angle 0-45 degree It is better than 89%, which can meet the requirements of ultraviolet light, visible light and near-infrared imaging at the same time when the viewing angle is large.

The anti-fog self-cleaning optical reflector of the utility model can reach the super non-wetting self-cleaning standard, and has excellent wide-spectrum reflectance, and realizes the balance of high reflectance and hydrophobic and oleophobic. The reflector has been greatly improved in performance.

The utility model has the advantages of simple process, easy automatic control, strong environmental stability and high industrial value.

Claims (6)

1. An anti-fog self-cleaning optical reflector, comprising a substrate and a film layer covered on the surface of the substrate, is characterized in that, the film layer is formed by stacking four layers of films, followed by a silicon dioxide layer , aluminum film layer, silicon dioxide film layer and anti-fog self-cleaning coating. 2 . The anti-fog self-cleaning optical mirror according to claim 1 , wherein the self-cleaning coating is a waterproof drug layer. 3 . The anti-fog self-cleaning optical mirror according to claim 2 , characterized in that, the water-repellent layer adopts a polymer whose main raw material is N-perfluorooctylsulfonamidopropyltriethoxysilane. 4. The anti-fog self-cleaning optical mirror according to claim 1, characterized in that, the order in which the film layers are stacked by four layers of films is: the bottom layer is a silicon dioxide layer, and it is connected to the surface of the substrate. contact; the base film layer between the aluminum film and the substrate is a silicon dioxide layer, which is used to enhance the connection strength between the aluminum film and the substrate; the film layer between the aluminum film and the anti-fog self-cleaning coating is silicon dioxide Film layer; the outermost layer is an anti-fog self-cleaning coating. 5. The anti-fog self-cleaning optical mirror according to claim 1, characterized in that, the substrate can be an optical glass lens or a resin lens. 6. The anti-fog self-cleaning optical mirror according to any one of claims 1-5, wherein the thicknesses of each film layer are respectively: the thickness of the first layer is 10nm; the thickness of the second layer is 100nm; the thickness of the second layer is 100nm; The thickness of the third layer is 10nm; the thickness of the fourth layer is 10nm.