Sunscreen glass

Abstract

The utility model provides sunscreen glass. The sunscreen glass consists of a glass body and a plurality of optical thin film coatings with different refractive indexes, wherein the optical thin film coatings are coated on the glass body; the multi-layer optical thin film coating has spectral selectivity for incident light over a wide range of incident angles. The multi-layer optical thin film coating is composed of 8-16 layers of dielectric material laminated structures, and the thickness of each layer is 100-150nm. According to the utility model, the selective transmission and reflection of a wide-incident-angle solar spectrum are realized through the accurate design of the laminated dielectric films, so that ultraviolet rays and infrared rays are effectively blocked, the purpose of sun protection is achieved, and the energy consumption of an indoor air conditioner can be obviously reduced in hot summer.

Description

Technical Field

[0001] This utility model relates to sun-protective glass, and more particularly to sun-protective glass having a multi-layered laminated film structure. Background Technology

[0002] Sunscreen glass is a building material specifically designed to block ultraviolet (UV) radiation and heat, widely used in residential, commercial buildings, and automotive windows. It effectively reduces indoor temperature, improving the comfort of living and working environments, and protects indoor items from UV damage. Sunscreen glass typically uses films or coatings to block UV rays, thus achieving its sun protection effect. However, traditional sunscreen glass is usually designed only for perpendicularly incident light. In practical applications, the angle of sunlight incidence changes over time, resulting in decreased spectral selectivity at high angles of incidence, affecting its sun protection and energy-saving performance. Therefore, designing sunscreen glass capable of achieving spectral selectivity over a wide range of incident angles has significant market implications.

[0003] This invention addresses current market demands by proposing a sun-protective glass. It employs a layered structure composed of multiple optical thin films with different refractive indices, achieving selective transmission or reflection of specific wavelengths of incident light at a wide incident angle. This blocks infrared and ultraviolet light while transmitting visible light, thus providing sun protection over a wide range of incident angles. Utility Model Content

[0004] This invention proposes a sun-protective glass, which consists of a glass body and multiple layers of optical thin film coatings with different refractive indices applied to the glass body; the multiple layers of optical thin film coatings have spectral selectivity for incident light over a wide incident angle range.

[0005] The multilayer optical thin film coating consists of 8-16 layers of dielectric material stacked structure, each layer having a thickness of 100-150 nm, including: an aluminum nitride (AlN) film located as the outermost layer away from the glass body; other stacked structures are selected from four different dielectric materials, including silicon dioxide (SiO2), titanium dioxide (TiO2), silicon nitride (Si3N4), and aluminum oxide (Al2O3).

[0006] The spectral selectivity refers to high transmittance for visible light with wavelengths of 400-750 nanometers to maintain good visual transparency, while having high reflectance for the infrared and ultraviolet spectra to reduce the rise in indoor temperature caused by solar radiation.

[0007] The multilayer optical thin film coating is manufactured using plasma-enhanced chemical vapor deposition (PECVD) and atomic layer deposition (ALD) processes.

[0008] This invention utilizes a stacked structure composed of multiple optical thin films with different refractive indices to achieve selective transmission or reflection of incident light of specific wavelengths at a wide incident angle, thereby blocking infrared and ultraviolet spectra while transmitting visible light, thus achieving a sun protection effect over a wide incident angle range.

[0009] Other features and advantages of this utility model will become clearer after reading the detailed description of the embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0010] To clearly illustrate the technical solution and embodiments of this utility model, the accompanying drawings are briefly described below. It should be noted that the drawings are primarily intended to explain the interconnections, structural features, and advantages of the various components of the device, and are not drawn to scale according to the actual dimensions of the device. Obviously, the drawings only relate to a limited set of embodiments and should not be construed as limiting the present utility model. Those skilled in the art can easily obtain new embodiments through formal variations based on these drawings.

[0011] Figure 1 This is a cross-sectional structural diagram of one embodiment of the present invention. Detailed Implementation

[0012] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0013] This utility model proposes a sun-protective glass with the following cross-sectional structure: Figure 1 As shown. The sun-protective glass includes a glass body A1 and a coating structure A2 applied to the glass body A1. The coating structure A2 consists of multiple layers of optical thin film coatings with different refractive indices. Through precise layering design, these thin film coatings achieve selective transmission or reflection of specific wavelengths of light within a wide incident angle range, thereby achieving the desired spectral selectivity. Spectral selectivity refers to high transmittance for visible light with wavelengths of 400-750 nanometers to maintain good visual transparency, while exhibiting high reflectivity for the infrared and ultraviolet spectra to reduce indoor temperature rise caused by solar radiation.

[0014] The optical thin film coating with different refractive indices consists of a stacked structure of 8-16 layers of dielectric material, each layer having a thickness of 100-150 nm, including:

[0015] An aluminum nitride (AlN) film, located on the outermost layer away from the glass body A1, provides high abrasion resistance;

[0016] Other stacked structures were selected from four different dielectric materials with different dielectric constants / refractive indices, including silicon dioxide (SiO2), titanium dioxide (TiO2), silicon nitride (Si3N4), and aluminum oxide (Al2O3).

[0017] As optical principles show, the angle of incidence of light, as well as the thickness and material selection of each dielectric layer, affect the transmission and refraction characteristics of incident light. Since the dielectric constant / refractive index of the dielectric material is a function of the incident light frequency, incident light undergoes multiple frequency-selective refractions and reflections when penetrating a multilayered dielectric structure. By selecting appropriate layer thicknesses and the materials used in each layer, selective transmission or reflection of specific wavelengths of incident light can be achieved over a wide range of incident angles, thereby blocking infrared and ultraviolet light while transmitting visible light. Mathematically, this can be reduced to a combinatorial optimization problem. Using machine learning algorithms such as genetic algorithms, ant colony optimization, and simulated annealing, the appropriate layer thickness and the materials used in each dielectric layer can be determined by iteratively solving for local optima.

[0018] The structure of a 10-layer optical thin film coating determined by a machine learning algorithm is as follows: AlN / Al2O3 / TiO2 / Si3N4 / TiO2 / Al2O3 / SiO2 / Al2O3 / TiO2 / Al2O3 / , with a thickness of 130nm for each layer.

[0019] The optical thin film coatings are manufactured using plasma-enhanced chemical vapor deposition (PECVD) and atomic layer deposition (ALD) processes.

[0020] This invention, through a precise design of a laminated dielectric film, achieves selective transmission and reflection of the solar spectrum with a wide incident angle by stacking multiple dielectric materials on glass using a thin-film process. This effectively blocks ultraviolet and infrared light, achieving the purpose of sun protection and significantly reducing indoor air conditioning energy consumption in the hot summer.

[0021] The description of this utility model is given for illustrative purposes only and is not intended to be exhaustive or to limit the utility model to the disclosed forms. The embodiments were chosen and described to better illustrate the principles and practical applications of the utility model, and to enable those skilled in the art to understand the utility model and design various embodiments with various modifications suitable for a particular purpose. All new embodiments that fall within the basic concept, construction principles, and spirit of this utility model, and are achieved through simple variations, modifications, equivalent substitutions, or improvements, should be included within the scope of protection of this utility model. The scope of this utility model is defined by the appended claims.

Claims

1. A solar control glass, characterized in that, The sun-proof glass is composed of a glass body and a multilayer optical thin film coating with different refractive indexes coated on the glass body; the multilayer optical thin film coating has spectral selectivity to incident light in a wide range of incident angles.

2. The solar control glass according to claim 1, wherein, The multilayer optical thin film coating is composed of 8-16 layers of medium material laminated structure, and each layer has a thickness of 100-150 nm.

3. The solar control glass according to claim 1, wherein, The spectral selectivity refers to high transmittance to visible light with a wavelength of 400-750 nm to maintain good visual transparency, and high reflectivity to infrared and ultraviolet spectrum to reduce indoor temperature rise caused by solar radiation.

4. Sun protection glass according to any of claims 1 to 3, characterized in that The multilayer optical thin film coating is manufactured by plasma enhanced chemical vapor deposition and atomic layer deposition processes.

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