A long-life eyeglass lens

Abstract

This utility model relates to the field of lens manufacturing technology, specifically to a long-life eyeglass lens. The lens comprises a substrate and, sequentially stacked on the substrate surface, the following layers: an impact-resistant hardening and reinforcing film layer, a silicon-alumina transition buffer film layer, a nano-ceramic anti-reflective film stack, a nano-DLC film layer, a silicon oxide film layer, and an AF anti-oil and anti-fingerprint film layer. The nano-ceramic anti-reflective film stack consists of alternating depositions of low-refractive-index silicon-alumina layers and high-refractive-index silicon-alumina nitride layers. The silicon-alumina nitride layer accounts for more than 50% of the thickness of the nano-ceramic anti-reflective film stack, while the silicon-alumina layer accounts for less than 50%. The purpose of this utility model is to provide a long-life eyeglass lens by depositing a nano-structured ceramic film on the lens surface using vacuum coating technology. This enhances the hardness of the plastic lens, reduces surface wear and scratches, thereby improving the lens's usability and reducing the frequency of eyeglass replacement for nearsighted users.

Description

Technical Field

[0001] This utility model relates to the field of lens manufacturing technology, specifically to a long-life eyeglass lens. Background Technology

[0002] Currently, eyeglasses are increasingly being used as a vision correction tool for nearsightedness, and the trend is towards younger people using them. Although there are various materials for eyeglass lenses, such as glass, resin, and polycarbonate, most mainstream eyeglass lenses currently use propylene glycol carbonate (CR39) or polyurethane. These materials are lightweight, weighing about 50% of glass lenses, have strong impact resistance, high light transmittance, low cost, and low surface hardness.

[0003] The frequency of replacing glasses for nearsighted individuals varies from person to person, mainly depending on changes in prescription, lens wear, and usage habits. Adults typically replace their glasses every 2-3 years. The main reason for replacing glasses is not usually a change in prescription, but rather scratches and abrasions on the lens surface. The more severe the scratches and abrasions, the shorter the lifespan of the glasses. Therefore, there is a need for glasses with scratch-resistant lenses to extend their overall lifespan. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a long-life eyeglass lens. By using vacuum coating technology to deposit a nano-structured ceramic film on the lens surface, the hardness of the plastic lens is enhanced, the wear and scratches on the lens surface are reduced, thereby improving the lens's usability and reducing the frequency of eyeglass replacement for nearsighted users.

[0005] This utility model is achieved through the following technical solution:

[0006] A long-life eyeglass lens includes a substrate and a stacked structure disposed at one end of the substrate. The stacked structure includes an impact-resistant hardening and reinforcing film layer, a silicon-aluminum transition buffer film layer, a nano-ceramic antireflective film stack, a nano-DLC film layer, a silicon oxide film layer, and an AF anti-oil and anti-fingerprint film layer stacked sequentially. The nano-ceramic antireflective film stack is mainly composed of n layers of silicon aluminum oxide and m layers of high refractive index silicon aluminum nitride, where n+m=7 and n>m.

[0007] The impact-resistant hardening and strengthening film is a methylsiloxane-based organic coating with a thickness between 3 and 10 μm.

[0008] The coefficient of thermal expansion of the silicon-aluminum transition buffer film is between that of the substrate and the nano-ceramic antireflective film stack.

[0009] The nano-ceramic antireflective film stack achieves an average reflectivity of less than 0.5% in the 430-680nm wavelength band, a single-layer coating transmittance of greater than or equal to 94.5%, and a double-layer coating transmittance of 98-99%.

[0010] The thickness of the nano-DLC film is 3-10 nm, the thickness of the silicon oxide film is 10-20 nm, and the thickness of the AF anti-oil and anti-fingerprint film is 30-100 nm.

[0011] The substrate is made of one of resin, polycarbonate, propylene diethylene glycol carbonate, or polyurethane, and has a thickness of 1-15 mm.

[0012] The total thickness of the nano-ceramic antireflective film stack is 250 nm and includes a total of 7 layers of aluminum oxide silicon oxide and aluminum silicon nitride.

[0013] The nano-ceramic antireflective film stack has 4-18 layers and is adapted to the optical effects of blue or green films.

[0014] The oil-resistant and fingerprint-resistant film layer is mainly made of fluoropolymer.

[0015] The lens is a double-layer coating symmetrically arranged with respect to the substrate. The coating is mainly composed of an impact-resistant hardening and strengthening film layer, a silicon-aluminum transition buffer film layer, a nano-ceramic antireflective film stack, a nano-DLC film layer, a silicon oxide film layer, and an AF anti-oil and anti-fingerprint film layer stacked together.

[0016] The substrate has a stacked structure at both ends.

[0017] The beneficial effects of this utility model are: This invention provides a long-life eyeglass lens. A nanostructured ceramic film is deposited on the lens surface using vacuum coating technology, enhancing the hardness of the plastic lens and reducing surface scratches and abrasions, thereby reducing the frequency of lens replacement for nearsighted users. This nanostructured ceramic film increases lens transmittance, reduces surface reflectivity, and the anti-fouling film on the lens surface also prevents oil and fingerprints, enhancing the lens's weather resistance. Attached Figure Description

[0018] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the lens of this utility model.

[0020] Figure 2 This is a diagram showing the average reflectance of a ceramic nanostructure film stack.

[0021] Figure 3 This is a structural data diagram of a ceramic nanostructured membrane stack.

[0022] Figure Labels Substrate--1, Impact-resistant hardening and strengthening film--2, Silicon-aluminum transition buffer film--3, Nano-ceramic antireflective film stack--4, Nano-DLC film--5, Silicon oxide film--6, AF anti-oil and anti-fingerprint film--7. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] Example 1 like Figure 1 As shown, this embodiment discloses a long-life eyeglass lens, which includes a substrate (1) and a stacked structure disposed at one end of the substrate (1). The stacked structure includes an impact-resistant hardening and strengthening film layer 2, a silicon-aluminum transition buffer film layer 3, a nano-ceramic antireflective film stack 4, a nano-DLC film layer 5, a silicon oxide film layer 6, and an AF anti-oil stain and anti-fingerprint film layer 7, which are stacked in sequence. The nano-ceramic antireflective film stack (4) is mainly composed of n layers of silicon aluminum oxide and m layers of high refractive index silicon aluminum nitride, where n+m=7 and n>m.

[0027] In this embodiment, the material of the substrate 1 can be resin, polycarbonate, etc. Currently, most mainstream myopia lenses use propylene diethylene glycol carbonate (CR39) or polyurethane, etc., with a thickness of 1-15 mm.

[0028] In this embodiment, the impact-resistant hardening and strengthening film layer 2 is a methylsiloxane-based organic coating. To ensure good adhesion of the film layer, a layer of impact-resistant hardening and strengthening film layer 2 with a thickness of 3-10 micrometers can be coated by a spray coating or impregnation process. Its main function is to improve the hardness of the substrate and enhance the scratch and abrasion resistance of the plastic substrate.

[0029] In this embodiment, the coefficient of thermal expansion of the silicon-aluminum transition buffer film 3 is between that of the substrate 1 and the nano-ceramic antireflective film stack 4. Generally, the coefficient of thermal expansion of the plastic substrate 1 is on the order of 10⁻⁵, while the antireflective film commonly used in eyeglass lenses is made of inorganic materials with a coefficient of thermal expansion on the order of 10⁻⁶. The buffer layer can prevent the ultra-hard antireflective film layer of the lens from peeling off due to high and low temperature usage environments.

[0030] In this embodiment, the total thickness of the nano-ceramic antireflective film stack 4 is 250 nm and includes a total of 7 layers of silicon aluminum oxide and silicon aluminum nitride, with a specific ratio in which silicon aluminum nitride accounts for 51.7% of the total thickness, which is greater than 50%, while silicon aluminum oxide accounts for less than 50%. Specific film structure data can be found... Figure 3 .

[0031] Specifically, ceramic nanostructured films exhibit antireflective properties. The nano-ceramic antireflective film stack 4 achieves an average reflectivity of less than 0.5% in the 430-680nm wavelength range, a single-layer coating transmittance greater than or equal to 94.5%, and a double-layer coating transmittance reaching 98-99%. For details, please refer to... Figure 2 .

[0032] In addition, the number of layers of the nano-ceramic antireflective membrane stack 4 can be set to 4-18 layers according to requirements, and can also be designed as a classic green or blue membrane according to customer preferences.

[0033] Furthermore, the nano-DLC film layer 5 has a thickness of 3-10nm, giving the lens better hardness and scratch resistance; the silicon oxide film layer 6 has a thickness of 10-20nm, mainly to enhance the adhesion between the AF film and the lens; the AF anti-oil and anti-fingerprint film layer 7 has a thickness of 30-100nm, which covers the film layer already coated on the substrate 1 to prevent oil stains and fingerprints from appearing during product use, and can pass the stringent high and low temperature and salt spray tests of industries such as mobile phones.

[0034] Example 2 In this embodiment, an impact-resistant hardening and strengthening film layer 2, a silicon-aluminum oxide transition buffer film layer 3, a nano-ceramic antireflective film stack 4, a nano-DLC film layer 5, a silicon oxide film layer 6, and an AF anti-oil and anti-fingerprint film layer 7 are sequentially deposited on the surface of the substrate 1 using vacuum deposition technology.

[0035] In this embodiment, the thickness of a single stack of nanofilms is 70-90 nanometers using the vacuum coating nanotechnology.

[0036] The nano-DLC film layer 5 is prepared by high-power pulsed magnetron sputtering, with a thickness of 3-10 nm, which gives the lens better hardness and scratch resistance.

[0037] The silicon oxide film 6 has a thickness of 10-20 nm and is prepared by radio frequency magnetron sputtering. The average surface roughness Ra is less than 0.5 nm, which further enhances the abrasion resistance of the AF anti-oil and anti-fingerprint film 7.

[0038] The AF anti-oil and anti-fingerprint film layer 7 covers the film layer already coated on the substrate 1, which can prevent oil stains and fingerprints that affect the appearance of the panel during use, and can increase the wear resistance and acid, alkali and salt spray resistance of the film layer.

[0039] Through the above production process, long-life eyeglass lenses can be prepared in a vacuum in one go, with fewer dust particles and a high yield rate.

[0040] Example 3 In this embodiment, the substrate 1 is made of one of the following materials: glass, PC plastic, PMMA, stainless steel, etc. The first step in the process preparation is to use ultrasonic pure water cleaning.

[0041] If substrate 1 is made of PMMA, the impact-resistant and hardening reinforcing film 2 on the outer surface can be applied by spraying or dip-coating with a methylsiloxane-based organic coating. A layer of coating is applied to the lens surface, followed by UV coating or baking, with a thickness of 3-10 μm. Its main function is to improve the lens's hardness and scratch and abrasion resistance. It also serves as a transition layer to enhance the adhesion of the vacuum film.

[0042] Example 4 In this embodiment, the silicon oxide film 6 serves as a transition layer. It is deposited using a high-purity quartz target and a radio frequency magnetron sputtering method. The deposited film is dense, and the film thickness is controlled to be 10-20 nm.

[0043] Example 5 In this embodiment, after the impact-resistant hardening and strengthening film layer 2 to the anti-oil and anti-fingerprint film layer 7 are deposited on the substrate 1, the anti-oil and anti-fingerprint film layer 7 is deposited by vacuum resistance evaporation. The thickness is 30-100nm. Its main function is to cover the film layer already deposited on the substrate 1 to prevent oil stains and fingerprints that affect the appearance of the panel during use. The anti-oil and anti-fingerprint film layer 7 is made of fluoropolymer. The hydrophobic film layer is required to have a water droplet angle greater than 110°. After 3000 cycles of steel wool friction test, the water droplet angle is above 100°.

[0044] Example 6 In this embodiment, the lens is double-coated. After the above process is completed, and according to one or more of the schemes in Embodiments 1-5, the two ends of the substrate are respectively formed with a stacked structure.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A long-life spectacle lens, characterized in that, It includes a substrate (1) and a stacked structure disposed at one end of the substrate (1). The stacked structure includes an impact-resistant hardening and strengthening film layer (2), a silicon-aluminum transition buffer film layer (3), a nano-ceramic antireflective film stack (4), a nano-DLC film layer (5), a silicon oxide film layer (6), and an AF anti-oil stain and anti-fingerprint film layer (7) stacked in sequence. The impact-resistant hardening and strengthening film layer (2) is connected to the substrate (1). The nano-ceramic antireflective film stack (4) is mainly composed of n layers of silicon aluminum oxide and m layers of high refractive index silicon aluminum nitride, where n+m=7 and n>m.

2. The long-life spectacle lens according to claim 1, characterized in that, The impact-resistant hardening and strengthening film layer (2) is a methylsiloxane organic coating with a thickness between 3-10 μm.

3. The long-life spectacle lens according to claim 1, characterized in that, The coefficient of thermal expansion of the silicon-aluminum transition buffer film (3) is between that of the substrate (1) and the nano-ceramic antireflective film stack (4).

4. A long-life spectacle lens according to claim 1, characterized in that, The nano-ceramic antireflective film stack (4) achieves an average reflectivity of less than 0.5% in the 430-680nm band, a single-layer coating transmittance of greater than or equal to 94.5%, and a double-layer coating transmittance of 98-99%.

5. A long-life spectacle lens according to claim 1, characterized in that, The thickness of the nano-DLC film (5) is 3-10nm, the thickness of the silicon oxide film (6) is 10-20nm, and the thickness of the AF anti-oil and anti-fingerprint film (7) is 30-100nm.

6. The long-life spectacle lens according to claim 1, characterized in that, The substrate (1) is made of one of resin, polycarbonate, propylene diethylene glycol carbonate or polyurethane, and has a thickness of 1-15 mm.

7. A long-life spectacle lens according to claim 1, characterized in that, The total thickness of the nano-ceramic antireflective film stack (4) is 250 nm and includes a total of 7 layers of silicon aluminum oxide and silicon aluminum nitride.

8. A long-life spectacle lens according to claim 1, characterized in that, The nano-ceramic antireflective film stack (4) has 4-18 layers and is adapted to the optical effects of blue or green films.

9. A long-life spectacle lens according to claim 1, characterized in that, The oil-proof and fingerprint-proof film layer (7) is mainly made of fluoropolymer.

10. A long-life spectacle lens according to any one of claims 1-9, characterized in that, The substrate has a stacked structure at both ends.

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