CN208200755U - Anti reflection glass - Google Patents

Abstract

The utility model relates to an anti-reflection glass. An anti-reflection glass, comprising a glass substrate and an anti-reflection film, the glass substrate has a first surface and a second surface opposite to the first surface, the first surface and the second surface are provided with anti-reflection A reflective film, the anti-reflective film includes a first high refractive index layer, a first low refractive index layer, a second high refractive index layer and a second low refractive index layer stacked in sequence, wherein the second high refractive index layer It is a composite layer of ceria-titania. The above-mentioned anti-reflection film can prevent ultraviolet rays and has a neutral color.

Description

Anti-reflection glass

technical field

The utility model relates to an anti-reflection glass.

Background technique

As we all know, light will reflect on the interface of two media. When the optical path difference of the reflected light is exactly equal to half the wavelength of the incident light, the reflected light will cancel each other out, thereby greatly reducing the light reflection loss of the optical device and enhancing the intensity of the transmitted light. In the fields of optical lens, display showcase glass, etc., this kind of anti-reflection and anti-reflection coated glass has a very wide range of applications.

However, the existing anti-reflection glass usually only has the properties of low reflection and high transmission in the range of visible light, and cannot play the role of isolating ultraviolet rays. In applications where UV protection is required, it is usually in the form of laminated glass. However, it is clear that laminated glass will increase the weight of the glass by more than two times. For some environments that require the use of lightweight glass, it is undoubtedly subject to great application restrictions.

At present, there are also some anti-ultraviolet glasses, which can achieve the anti-ultraviolet effect by adding anti-ultraviolet components to the composition of the glass. However, the glass is often colored because of the added anti-ultraviolet components, which does not meet the requirements of many applications.

Utility model content

Based on this, it is necessary to provide a neutral color anti-reflection glass capable of preventing ultraviolet rays.

An anti-reflection glass, comprising a glass substrate and an anti-reflection film, the glass substrate has a first surface and a second surface opposite to the first surface, the first surface and the second surface are provided with anti-reflection A reflective film, the anti-reflective film includes a first high refractive index layer, a first low refractive index layer, a second high refractive index layer and a second low refractive index layer stacked in sequence, wherein the second high refractive index layer It is a composite layer of ceria-titania.

The above-mentioned anti-reflection glass is provided with an anti-reflection film on the first surface and the second surface of the glass substrate, and the anti-reflection film includes a first high-refractive index layer, a first low-refractive-index layer, a second high-refractive-index layer and The second low-refractive-index layer, the second high-refractive-index layer is a ceria-titanium dioxide composite layer, which can block the transmission of ultraviolet rays, and both sides of the glass substrate can play the function of preventing ultraviolet rays, and the ultraviolet blocking rate is ≥ 99%. Each layer is made to have relatively low reflection and high transmittance optical effects through reflection interference, and the visible light reflectance is ≤ 1%. By adjusting the thickness of each layer, anti-reflection glass with neutral color can be prepared.

In one of the embodiments, the refractive index of the first high refractive index layer and the second high refractive index layer is 2.2-2.5; the refractive index of the first low refractive index layer and the second low refractive index layer The refractive index is 1.47-1.53.

In one embodiment, the ceria-titania composite layer includes a ceria layer and a titania layer stacked in sequence.

In one of the embodiments, the first high refractive index layer is selected from at least one of niobium pentoxide layer and ceria-titania composite layer; and/or

The thickness of the first high refractive index layer is 5 nm to 50 nm; and/or

The thickness of the second high refractive index layer is 50nm-150nm.

In one of the embodiments, the first low refractive index layer is a silicon dioxide layer; and/or

The thickness of the first low refractive index layer is 10nm-50nm.

In one of the embodiments, the second low refractive index layer is a silicon dioxide layer; and/or

The thickness of the second low refractive index layer is 30nm-120nm.

In one of the embodiments, it further includes a protective layer laminated on the surface of the second low refractive index layer.

In one embodiment, the protective layer is at least one layer selected from a zirconium dioxide layer, a silicon nitride layer and a silicon carbide layer.

In one of the embodiments, the thickness of the glass substrate is 1.6mm-19mm.

In one of the embodiments, the glass substrate is a neutral color glass substrate.

Description of drawings

1 is a schematic structural view of an anti-reflection glass according to an embodiment;

Fig. 2 is a schematic structural view of the anti-reflection film of the anti-reflection glass of Fig. 1;

Fig. 3 is the transmittance curve and reflection curve figure of the anti-reflection glass prepared in embodiment 1;

FIG. 4 is a graph showing the transmittance and reflection curves of the anti-reflection glass prepared in Example 2.

Detailed ways

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present utility model are provided in the accompanying drawings. However, the invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "far," "near," and similar expressions are used herein for purposes of description only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terms used herein in the description of the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , an anti-reflection glass 100 according to an embodiment includes a glass substrate 110 and an anti-reflection film 130 .

In one embodiment, the thickness of the glass substrate 110 is 1.6mm˜19mm, preferably 1.6mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm or 19mm.

In one embodiment, the maximum size of the glass substrate 110 is 3300mm×6000mm. Preferably, the size of the glass substrate 110 is 300mm×300mm˜3300mm×6000mm.

The glass substrate 110 has a first surface 113 and a second surface 115 opposite to the first surface. Both the first surface 113 and the second surface 115 are provided with an anti-reflection film 130 .

The antireflection film 130 includes a first high refractive index layer 131 , a first low refractive index layer 133 , a second high refractive index layer 135 , a second low refractive index layer 137 and a protective layer 139 stacked in sequence.

The first high refractive index layer 131 is laminated on the surface of the glass substrate 110, and its main function is to connect with the glass substrate, adjust the reflective color performance, and block the diffusion of alkali metal ions in the glass. Specifically, the first high refractive index layer 131 of the anti-reflection film 130 stacked on the first surface 113 is stacked on the first surface 113, and the first high refractive index layer 131 of the anti-reflection film 130 stacked on the second surface 115 is stacked on the second surface.

The refractive index of the first high refractive index layer 131 is 2.2˜2.5. In one of the embodiments, the first high refractive index layer 131 is selected from at least one of niobium pentoxide layer and ceria-titanium dioxide composite layer. effect. In some embodiments, the ceria-titania composite layer includes a ceria layer and a titania layer stacked in sequence, and the ceria layer is stacked on the surface of the glass substrate 110 or the titania layer is stacked on the surface of the glass substrate 110 . In some embodiments, the ceria-titania composite layer is a ceria-titania mixed material layer, and the molar ratio of CeO ₂ to TiO ₂ in the CeO ₂ -TiO ₂ mixed material is 4:6˜6:4. It should be noted that, in other implementation manners, the first high refractive index layer 131 may also be selected from at least one of a silicon nitride layer, a niobium pentoxide layer, and a titanium dioxide layer. The thickness of the first high refractive index layer 131 is 5 nm to 50 nm, preferably 8 nm to 30 nm, more preferably 10 nm to 20 nm. In the cerium dioxide-titanium dioxide composite layer, the thickness of the cerium dioxide layer is 2.4nm-24nm, and the thickness of the titanium dioxide layer is 2.6nm-26nm.

The first low-refractive-index layer 133 is stacked on the surface of the first high-refractive-index layer 131 , and its main function is to adjust the interference of the film layer and the appearance color. The refractive index of the first low refractive index layer 133 is 1.47˜1.53. In one embodiment, the first low refractive index layer 133 is a silicon dioxide layer. The thickness of the first low refractive index layer 133 is 10 nm to 50 nm, preferably 20 nm to 40 nm, more preferably 25 nm to 35 nm.

The second high-refractive-index layer 135 is stacked on the surface of the first low-refractive-index layer 133 , and its main function is to block the transmission of ultraviolet rays and adjust the interference and reflection color of the film layer. The refractive index of the second high refractive index layer 135 is 2.2˜2.5. In one embodiment, the second high refractive index layer 135 is a composite layer of ceria-titanium dioxide. At this time, the second high refractive index layer 135 has the function of blocking the transmission of ultraviolet rays. In some embodiments, the ceria-titania composite layer includes a ceria layer and a titania layer stacked in sequence, and the ceria layer is stacked on the surface of the glass substrate 110 or the titania layer is stacked on the surface of the glass substrate 110 . In some embodiments, the ceria-titania composite layer is a ceria-titania mixed material layer, and the molar ratio of CeO ₂ to TiO ₂ in the CeO ₂ -TiO ₂ mixed material is 4:6˜6:4. The thickness of the second high refractive index layer 135 is 50 nm to 150 nm, preferably 80 nm to 140 nm, more preferably 100 nm to 120 nm. In the cerium dioxide-titanium dioxide composite layer, the thickness of the cerium dioxide layer is 24nm-72nm, and the thickness of the titanium dioxide layer is 26nm-78nm.

The second low refractive index layer 137 is laminated on the surface of the second high refractive index layer 135 , and its main function is to adjust the interference of the film layer and the appearance color. The refractive index of the second low refractive index layer 137 is 1.47˜1.53. In one embodiment, the second low refractive index layer 137 is a silicon dioxide layer. The thickness of the second low refractive index layer 137 is 30nm-120nm, preferably 40nm-100nm, more preferably 50nm-80nm.

The protective layer 139 is laminated on the surface of the second low-refractive index layer 137, and its main function is to make the film exposed to outdoor environments, and also to prevent defects such as scratches and chemical corrosion on the coated film layer, so as to ensure that the product is transported, installed and Integrity in use. The refractive index of the protective layer 139 is 2.0-2.35. The protection layer 139 is at least one layer selected from a zirconium dioxide (ZrO ₂ ) layer, a silicon nitride (Si ₃ N ₄ ) layer and a silicon carbide (SiC) layer. The thickness of the protective layer 139 is 2 nm to 20 nm, preferably 4 nm to 15 nm, more preferably 5 nm to 10 nm. Of course, it should be noted that the protective layer 139 can be adaptively adjusted according to different application environments, as long as it can meet the requirements of the anti-reflection glass 100 .

The above-mentioned anti-reflection glass 100 is provided with an anti-reflection film 130 on the first surface 113 and the second surface 115 of the glass substrate 110. The anti-reflection film 130 includes a first high refractive index layer 131 and a first low refractive index layer 133 stacked in sequence. 1. The second high refractive index layer 135 and the second low refractive index layer 137, through reflection interference, make it have relatively low reflection and high transmittance optical effects; the first high refractive index layer 131 is selected from niobium pentoxide layer and At least one of the ceria-titania composite layers, the ceria-titania composite layer can block the penetration of ultraviolet rays, and play a part of the function of preventing ultraviolet rays; the second high refractive index layer 135 is a ceria-titania composite layer , can block the penetration of ultraviolet rays, play the function of anti-ultraviolet rays, and the ultraviolet blocking rate is ≥99%; each layer has a relatively low reflection and high transmission optical effect through reflection interference, and can be prepared by adjusting the thickness of each layer. Neutral color anti-reflection glass, as determined by experiments, the visible light reflectance of anti-reflection glass 100 is ≤1%, and the color is neutral; each layer of the anti-reflection film is made of inorganic materials with strong oxidation resistance, which can be stably exposed to It is used in outdoor environment and has high weather resistance.

The aforementioned anti-reflection glass is prepared by using horizontal magnetron sputtering equipment. Specifically, it is prepared by an off-line magnetron sputtering coating process, and is prepared by using an intermediate frequency AC power supply and a rotating cathode.

The following will be described in conjunction with specific embodiments.

Example 1

The structure of the anti-reflection glass of embodiment 1 is: anti-reflection film/ultra clear glass (6mm)/anti-reflection film,

The structure of the anti-reflection film is: niobium pentoxide layer (12.5nm)/silicon dioxide layer (30nm)/ceria-titanium dioxide composite layer (108.5nm, the thickness of the cerium oxide layer is 55nm)/silicon dioxide layer (70.5nm)/silicon nitride layer (5nm). Layers of niobium pentoxide are laminated on the surface of ultra-clear glass. In the formula, "/" represents stacking, and the numbers in brackets represent the thickness of each layer, which are the same in the following embodiments.

The transmittance and reflection curves of the prepared anti-reflection glass were tested with a UV-Vis spectrophotometer (Lambda 950), and the results are shown in Figure 3. It can be seen from Figure 3 that the visible light reflectance of the anti-reflection glass is 0.85%, and the visible light transmittance is 98.4%.

A desktop photometer (Datacolor 650) was used to test the chromaticity value of the prepared anti-reflection glass. The result was that the reflection color a* was -0.5, and the reflection color b* was 0.43. It can be seen that the anti-reflection glass presents a neutral tone.

Example 2

The structure of the anti-reflection glass of embodiment 2 is: anti-reflection film/ultra clear glass (6mm)/anti-reflection film,

The structure of the anti-reflection film is: ceria-titania composite layer (13nm, wherein the thickness of ceria layer is 6nm)/silicon dioxide layer (33nm)/ceria-titania composite layer (112.5nm, of which The thickness of the cerium layer is 57 nm)/silicon dioxide layer (67 nm)/silicon nitride layer (7 nm). The composite layer of ceria-titanium dioxide is laminated on the surface of ultra-white glass.

The transmittance and reflection curves of the prepared anti-reflection glass were tested with a UV-Vis spectrophotometer (Lambda 950), and the results are shown in Figure 4. It can be seen from Fig. 4 that the visible light reflectance of the anti-reflection glass is 0.92%, and the visible light transmittance is 98.1%.

A desktop photometer (Datacolor 650) was used to test the chromaticity value of the prepared anti-reflection glass. The result was that the reflection color a* was -0.32, and the reflection color b* was 0.55. It can be seen that the anti-reflection glass presents a neutral tone.

Example 3

The structure of the anti-reflection glass of embodiment 3 is: anti-reflection film/ultra clear glass (3mm)/anti-reflection film,

The structure of the anti-reflection film is: niobium pentoxide layer (10.5nm)/silicon dioxide layer (35nm)/ceria-titania composite layer (111.5nm, the thickness of the cerium oxide layer is 55nm)/silicon dioxide layer (73nm)/silicon nitride layer (6.5nm). Layers of niobium pentoxide are laminated on the surface of ultra-clear glass.

The transmittance curve and reflectance curve of the prepared anti-reflection glass were tested by a UV-visible spectrophotometer (Lambda 950). The visible light reflectance of the anti-reflection glass was 0.95%, and the visible light transmittance was 98.5%.

A desktop photometer (Datacolor 650) was used to test the chromaticity value of the prepared anti-reflection glass. The result was that the reflection color a* was -0.8, and the reflection color b* was -1.2. It can be seen that the anti-reflection glass presents a neutral tone.

Example 4

The structure of the anti-reflection glass of embodiment 4 is: anti-reflection film/ultra clear glass (3mm)/anti-reflection film,

The structure of the anti-reflection film is: ceria-titania composite layer (14nm)/silicon dioxide layer (29nm)/ceria-titania composite layer (115.5nm, wherein the thickness of the ceria layer is 58.5nm)/two Silicon oxide layer (69nm)/silicon nitride layer (6.5nm). The composite layer of ceria-titanium dioxide is laminated on the surface of ultra-white glass.

The transmittance curve and reflectance curve of the prepared anti-reflection glass were tested with a UV-visible spectrophotometer (Lambda 950). The visible light reflectance of the anti-reflection glass was 0.95%, and the visible light transmittance was 98.2%.

A desktop photometer (Datacolor 650) was used to test the chromaticity value of the prepared anti-reflection glass. The result was that the reflection color a* was 0.8, and the reflection color b* was -0.1. It can be seen that the anti-reflection glass presents a neutral tone.

The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (10)

1. A kind of anti-reflection glass, it is characterized in that, comprises glass base and anti-reflection film, and described glass base has first surface and the second surface opposite with described first surface, and described first surface and described second surface Both surfaces are provided with an anti-reflection film, and the anti-reflection film includes a first high refractive index layer, a first low refractive index layer, a second high refractive index layer and a second low refractive index layer stacked in sequence, wherein the The second high refractive index layer is a ceria-titania composite layer. 2. The antireflection glass according to claim 1, characterized in that, the refractive indices of the first high refractive index layer and the second high refractive index layer are 2.2 to 2.5; the first low refractive index layer And the refractive index of the second low refractive index layer is 1.47˜1.53. 3 . The antireflection glass according to claim 1 , wherein the ceria-titania composite layer comprises a ceria layer and a titania layer stacked in sequence. 4 . 4. The antireflection glass according to claim 1, wherein the first high refractive index layer is selected from at least one of niobium pentoxide layer and ceria-titania composite layer; and/or The thickness of the first high refractive index layer is 5 nm to 50 nm; and/or The thickness of the second high refractive index layer is 50nm-150nm. 5. The antireflection glass according to claim 1, wherein the first low refractive index layer is a silicon dioxide layer; and/or The thickness of the first low refractive index layer is 10nm-50nm. 6. The antireflection glass according to claim 1, wherein the second low refractive index layer is a silicon dioxide layer; and/or The thickness of the second low refractive index layer is 30nm-120nm. 7. The antireflection glass according to claim 1, further comprising a protective layer laminated on the surface of the second low refractive index layer. 8 . The anti-reflection glass according to claim 7 , wherein the protective layer is at least one layer selected from a zirconium dioxide layer, a silicon nitride layer and a silicon carbide layer. 9. The anti-reflection glass according to claim 1, wherein the thickness of the glass substrate is 1.6mm-19mm. 10. The antireflection glass according to claim 1, wherein the glass substrate is a neutral color glass substrate.