A protective film for goggles and preparation method thereof

Abstract

The present invention discloses a protective film for goggles and a preparation method thereof, belonging to the field of goggles, wherein a protective film system composed of a single film material of titanium dioxide and silicon dioxide with different thicknesses is alternately plated on the surface of the goggles. The present invention has good blue light resistance and near-infrared performance, maintains good transmittance in the visible light range, increases the protection ability for human eyes and ensures good vision and imaging quality.

Description

Technical Field

[0001] The invention relates to the technical field of goggles, in particular to a protective film for goggles and a preparation method thereof. Background Art

[0002] Human beings are in various lighting environments, whether natural light or artificial light. On the one hand, they bring light to people, help people form vision, and observe the cognitive world; but on the other hand, the ultraviolet light, visible light, and infrared light they produce are harmful to human eyes to varying degrees. In recent years, with the development of science and technology and multimedia platforms, electronic screens such as televisions, computers, and mobile phones have been constantly filling people's lives. The development of network technology and the needs of modern families and offices have prompted more young people to become computer users and mobile phone addicts, and eye health problems are becoming more and more serious. These screens contain blue light, which is very harmful to the human eye. Blue light will increase the amount of toxins in the macular area of ​​the eye, damage the eyeball, affect vision, and seriously threaten people's eye health. And many near-infrared optical devices used for medical treatment will inevitably be reflected through various channels during the use of operators, or even directly shot into the human eye due to misoperation. These high-risk groups of eye injuries are very necessary to wear protective lenses to effectively prevent various bands of light from causing damage to the eyes.

[0003] The main parts of the human eye that ultraviolet rays damage are the cornea and lens, and they can also damage the retina, vitreous macula, etc. Repeated ultraviolet radiation can cause chronic blepharitis and acute keratoconjunctivitis.

[0004] Blue light is the light closest to ultraviolet light and has the highest energy, with a wavelength between 400-500nm. Long-term exposure to blue light can also damage the retina. In severe cases, it can cause vision loss and cause macular degeneration, which may cause red eyes, dry eyes, astringent eyes, blurred vision, visual fatigue, and pain in the head, shoulders, and cervical spine. Studies have shown that blue light is not only present in sunlight, but also in large quantities in computer monitors, fluorescent lights, mobile phones, digital products, projectors, etc. Short-wave blue light has extremely high energy and can penetrate the lens directly to the retina, causing light damage to the retina, directly or indirectly causing damage to the cells in the macula. Blue light can increase the amount of toxins in the macula of the eye, seriously threatening people's fundus health.

[0005] The damage of infrared rays (mainly near-infrared wavelengths of 780-1400nm) to the eyes is mainly caused by high temperature, which leads to damage to corneal matrix proteins, corneal opacity, and local opacity of the lens causing cataracts. It can also cause chronic blepharitis and conjunctivitis. Workers who work under infrared rays for a long time may also experience symptoms of dry eyes due to the continuous evaporation of tear film and poor secretion of accessory lacrimal glands. Some may also experience premature aging with decline in eye accommodation.

[0006] Studies have shown that when light hits the eye, about 4% is reflected from the cornea, and most of it will be absorbed by the cornea, aqueous humor, lens and vitreous body one by one, and finally reach the retina. The light emitted by high-power artificial light sources is mostly non-full-color spectrum, and the spectral components contain infrared and ultraviolet light. The lens and cornea absorb the most ultraviolet light. Therefore, long-term exposure to ultraviolet-rich lamps will induce photoelectric conjunctivitis, cause lens opacity, cataracts, and corneal and conjunctival inflammation. The light reflection coefficient of smooth and white paper is as high as 90%, which is about 10 times higher than that of grass, forest or fur decorations. The paper used in many publications nowadays is very smooth and bright, with a high reflectivity, and the eyes will feel tired in a very short time. According to other studies, long-term reading of books with particularly smooth paper can cause damage to the cornea and iris of the human eye, inhibit the function of retinal photoreceptor cells, and cause visual fatigue and decreased vision. The myopia rate among high school students in my country is as high as 60%. Relevant experts believe that the visual environment is the main cause of myopia, not eye habits.

[0007] Therefore, there is an urgent need for an eye protection device that has good anti-blue light and near-infrared performance and maintains good transmittance in the visible light range. Summary of the invention

[0008] The present invention provides a protective film for goggles and a preparation method thereof, which has good anti-blue light and near-infrared performance, maintains good transmittance in the visible light range, increases the protection ability for human eyes and ensures good vision and imaging quality.

[0009] The technical solution of the present invention is achieved in this way:

[0010] The invention discloses a protective film for goggles, comprising goggles, on the surface of which a protective film system composed of a single film material of titanium dioxide and silicon dioxide with several layers of different thicknesses is alternately plated.

[0011] As a preferred embodiment of the present invention, the silicon dioxide is plated on the outer surface of the titanium dioxide.

[0012] As a preferred embodiment of the present invention, a protective film system composed of 14 layers of titanium dioxide and silicon dioxide with different thicknesses is alternately coated on the surface of the goggles, wherein the number of layers of titanium dioxide and silicon dioxide are 7 layers respectively.

[0013] As a preferred embodiment of the present invention, the initial model of the protective film system is G|HL0.6(0.5HL0.5H)^31.85(0.5LH0.5L)^3|Air, wherein H is TiO2 and L is SiO2.

[0014] As a preferred embodiment of the present invention, the thickness of each single film material layer is less than 200 nm.

[0015] As a preferred embodiment of the present invention, the thickness of silicon dioxide is above 20 nm.

[0016] As a preferred embodiment of the present invention, the thickness range of each single film material is TiO210~12nm, SiO268~74nm, TiO210~14nm, SiO2175~185nm, TiO214~18nm, SiO248~54nm, TiO248~54nm, SiO225~30nm, TiO2152~162nm, SiO2181~171nm, TiO2100~110nm, SiO2172~182nm, TiO2100~108nm, SiO280~90nm.

[0017] A method for preparing a protective film for goggles, specifically comprising the following steps:

[0018] A layer of titanium dioxide film with a set thickness is plated on the surface of the goggles;

[0019] A layer of silicon dioxide film material with a set thickness is plated on the titanium dioxide film material;

[0020] Titanium dioxide film material and silicon dioxide film material are alternately plated until a set number of layers is reached.

[0021] As a preferred embodiment of the present invention, the titanium dioxide is pre-melted and then deposited by electron beam evaporation, and the silicon dioxide is deposited by electron beam evaporation.

[0022] As a preferred embodiment of the present invention, titanium dioxide film material and silicon dioxide film material are alternately plated until a set 14 layers are reached, wherein the number of titanium dioxide and silicon dioxide layers are 7 layers respectively, and the thickness of each single film material layer is less than 200 nm.

[0023] The beneficial effects of the present invention are: it has good anti-blue light and near-infrared performance, maintains good transmittance in the visible light range, increases the protection ability for human eyes and ensures good vision and imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a schematic structural diagram of an embodiment of a protective film for goggles of the present invention;

[0026] Figure 2 The measured spectral transmittance curve of a protective film for goggles of the present invention;

[0027] Figure 3 The present invention is a flow chart of a method for preparing a protective film for goggles. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] like Figure 1 As shown, the present invention proposes a protective film for goggles, including goggles, on the surface of which a protective film system composed of a single film material of titanium dioxide and silicon dioxide with different thicknesses is alternately plated. The initial model of the protective film system is G|HL0.6(0.5HL0.5H)^3 1.85(0.5LH0.5L)^3|Air, where H is TiO2 and L is SiO2.

[0031] Silicon dioxide is plated on the outer surface of titanium dioxide. Specifically, silicon dioxide (SiO2): light transmission band 0.2um-2um, no absorption at 0.2um-4um, refractive index 1.46, stable chemical properties, extremely strong mechanical properties, non-hygroscopic, wear-resistant and corrosion-resistant, small light scattering absorption, silicon dioxide is insoluble in water, does not react with water and general acids, evaporation is relatively stable, and generally does not require pre-melting. Titanium dioxide (TiO2): light transmission band 0.35-12um, refractive index 2.3, stable film performance, strong mechanical properties. Therefore, silicon dioxide can also serve as a waterproof layer. On the surface of the goggles, 14 layers of titanium dioxide and silicon dioxide are alternately plated to form a protective film system, of which the number of layers of titanium dioxide and silicon dioxide are 7 layers respectively. Silicon dioxide separates silicon dioxide, and silicon dioxide is on the outermost side for waterproofing and wear prevention.

[0032] Titanium dioxide is pre-melted and then deposited by electron beam evaporation, and silicon dioxide is deposited by electron beam evaporation.

[0033] The thickness of each single film material is less than 200nm. The thickness of silicon dioxide is above 50nm. The thickness range of each single film material is TiO210~12nm, SiO268~74nm, TiO210~14nm, SiO2175~185nm, TiO214~18nm, SiO248~54nm, TiO248~54nm, SiO225~30nm, TiO2 152~162nm, SiO2 181~171nm, TiO2 100~110nm, SiO2 172~182nm, TiO2 100~108nm, SiO2 80~90nm.

[0034] Specifically, the film system parameters of an embodiment of the present invention are shown in the following table.

[0035] Number of layers Film material Thickness(nm) 1 <![CDATA[TIO2]]> 11.82 2 <![CDATA[SIO2]]> 71.94 3 <![CDATA[TIO2]]> 12.90 4 <![CDATA[SIO2]]> 180.18 5 TIO2 16.61 6 <![CDATA[SIO2]]> 51.63 7 <![CDATA[TIO2]]> 51.30 8 <![CDATA[SIO2]]> 27.73 9 <![CDATA[TIO2]]> 157.95 10 <![CDATA[SIO2]]> 186.90 11 <![CDATA[TIO2]]> 106.23 12 <![CDATA[SIO2]]> 177.78 13 <![CDATA[TIO2]]> 103.19 14 <![CDATA[SIO2]]> 85.27

[0036] Table 1 Film parameters of protective film

[0037] like Figure 2 As shown, the transmittance of the blue light band 400-450nm of the present invention is 35%<T1<40%, that is, the interception rate of blue light is about 60%, which can well prevent blue light damage and ensure that part of the blue light is retained to reduce the color cast of the image.

[0038] The ultraviolet region and the blue light region are suppressed to the same extent. During the film system design process, the transmittance in the ultraviolet region is lower than that in the blue light region.

[0039] The average passing rate T4 of 800-1100nm in the near-infrared band is less than 50%, and the average passing rate T5 of 900-1100nm is less than 40%. The near-infrared band is effectively intercepted, the amount of heat input is reduced, the damage to the human eye is reduced, and the imaging and visual quality are improved.

[0040] In other embodiments, AF / AS coating may be added, i.e., anti-fouling film (AS), also known as hydrophobic film or anti-fingerprint film (AF film), which has the functions of waterproof, oil-proof, scratch-proof, anti-fingerprint, anti-pollution and easy to clean. It is beneficial to improve the performance of the lens in rainy days, water showers, foggy days, cold weather, fingerprints, etc. The water drop angle test result of the waterproof film is about 113 degrees, and the waterproof performance is excellent, reaching the industry standard level.

[0041] Specifically, the present invention discloses a method for designing a protective film for goggles, which is used for designing the protective film in the early stage, and specifically includes the following steps:

[0042] S1, obtaining and storing the light transmission band, refractive index, performance parameters, and plating method of a single film material;

[0043] S2, determining the shape, size and curvature value of each area of ​​the goggles, and establishing a 3D simulation goggles corresponding to the goggles;

[0044] S3, simulate the coating of a layer of film material in the 3D simulated goggles, and derive the various parameters of the film material and the protective effect factor of the thickness for each band of light;

[0045] S4, simulating the coating of multiple layers of film materials in 3D simulated goggles, and deriving the transmittance factor and refractive index factor of each film material to the adjacent film material;

[0046] S5, establishing an intelligent model of the protective film, inputting the type and number of layers of the film material into the intelligent model of the protective film, and deriving the simulation results; in this step, the corresponding simulation results can be output by adjusting the thickness of each layer of the film material.

[0047] S6, selecting parameters corresponding to a certain simulation result for actual coating, obtaining a measured spectral transmittance curve with error, repeating this step multiple times, obtaining an error model corresponding to the actual coating, and correcting the protective film intelligent model according to the error model.

[0048] like Figure 3 As shown, the present invention also discloses a method for preparing a protective film for goggles, which specifically comprises the following steps:

[0049] A layer of titanium dioxide film with a set thickness is plated on the surface of the goggles;

[0050] A layer of silicon dioxide film material with a set thickness is plated on the titanium dioxide film material;

[0051] Titanium dioxide film material and silicon dioxide film material are alternately plated until a set number of layers is reached.

[0052] The titanium dioxide is pre-melted and then plated by electron beam evaporation, and the silicon dioxide is plated by electron beam evaporation. The titanium dioxide film material and the silicon dioxide film material are alternately plated until the set 14 layers are reached, wherein the number of layers of titanium dioxide and silicon dioxide are 7 layers respectively, and the thickness of each single film material is less than 200nm. The thickness of silicon dioxide is above 50nm. Specifically, the film system parameters of one embodiment of the present invention are shown in Table 1.

[0053] The plating temperature of each layer of the film material of the present invention can be selected to be 340°C, and the specific process parameters are shown in the following table:

[0054] Material Inflation Air volume (SCCM) Vacuum degree(Pa) Evaporation rate (nm / S) Silicon dioxide <![CDATA[O2]]> 14 <![CDATA[1×10 -2 ]]> 0.6 Titanium Dioxide <![CDATA[O2]]> 54 <![CDATA[2×10 -2 ]]> 0.2

[0055] Table 2 Coating process parameters

[0056] During the plating process, silicon dioxide has better evaporation stability and does not require pre-melting. Titanium dioxide needs to be pre-melted, mainly to eliminate the influence of film material outgassing and some impurities. If a waterproof film is plated, resistance evaporation is used.

[0057] The present invention has good anti-blue light and near-infrared performance, maintains good transmittance in the visible light range, increases the protection ability for human eyes and ensures good vision and imaging quality.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective film for goggles, comprising goggles, characterized in that: The surface of the goggles is alternately coated with 14 layers of protective film system composed of single film materials of titanium dioxide and silicon dioxide of different thicknesses; wherein the number of layers of titanium dioxide and silicon dioxide is 7 layers respectively; the thickness of each single film material ranges from TiO2 10 to 12 nm, and SiO2 68 to 74 nm, TiO210~14nm, SiO2175~185nm, TiO214~18nm, SiO248~54nm, TiO248~54nm, SiO225~30nm, TiO2152~162nm, SiO2181~171nm, TiO2100~110nm, SiO2172~182nm, TiO2100~108nm, SiO280~90nm.

2. A protective film for goggles according to claim 1, characterized in that: The initial model of the protective film system is G|HL0.6(0.5HL0.5H)^31.85(0.5LH0.5L)^3|Air, Where H is TiO2 and L is SiO2.

3. The method for preparing a protective film for goggles according to claim 1, characterized in that: The specific steps include: A layer of titanium dioxide film with a set thickness is plated on the surface of the goggles; A layer of silicon dioxide film material with a set thickness is plated on the titanium dioxide film material; Titanium dioxide film material and silicon dioxide film material are alternately plated until a set number of layers is reached.

4. The method for preparing a protective film for goggles according to claim 3, characterized in that: The titanium dioxide is pre-melted and then deposited by electron beam evaporation, and the silicon dioxide is deposited by electron beam evaporation.

5. The method for preparing a protective film for goggles according to claim 3, characterized in that: Titanium dioxide film material and silicon dioxide film material are alternately plated until a set 14 layers are reached, wherein the number of layers of titanium dioxide and silicon dioxide are 7 layers respectively, and the thickness of each single film material is less than 200 nm.

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