Anti-blue light lens

Abstract

The utility model relates to the field of lens manufacturing, in particular to an anti-blue-light lens. According to the scheme, the composite blue light filter comprises a substrate layer, a composite blue light filter layer, an antifouling hydrophobic layer and an anti-reflection layer. The composite blue light filtering layer is composed of a reflection type high refractive index layer and an absorption type polymer layer. Through the division of labor and cooperation of preferentially intercepting high-energy blue light by the reflecting layer and filling a short-wave gap by the absorbing layer, the overall barrier efficiency of harmful blue light is remarkably improved, and secondary reflection glare caused by a single reflecting layer or serious color cast caused by the absorbing layer is avoided; meanwhile, on the basis of blue light filtering, components arranged in the substrate synchronously block ultraviolet rays, and blue light-ultraviolet composite protection is achieved; in addition, the arranged antifouling hydrophobic layer can reduce fingerprint and oil stain adhesion, reduce cleaning frequency, prolong optical performance stability of the lens, and make up for the defect that a traditional coated lens is easy to pollute and damage.

Description

Technical Field

[0001] This utility model relates to the field of lens manufacturing, specifically to a blue light blocking lens. Background Technology

[0002] In today's digital age, with people spending long hours in front of electronic screens, the harmful effects of blue light on the eyes are receiving increasing attention. Current blue light filtering lenses primarily rely on two methods: a single coating to reflect blue light or the addition of absorbent dyes. However, these traditional technologies reveal many problems that cannot be ignored.

[0003] However, most existing blue light filtering lenses use a single coating to reflect blue light or add absorbent dyeing materials, which have the following problems:

[0004] 1. Coated lenses reflect blue light, which can easily cause secondary reflections that interfere with vision, and their blocking efficiency for high-energy blue light (400-455nm) is insufficient.

[0005] 2. Lack of synergistic protection against ultraviolet radiation. Summary of the Invention

[0006] To address the aforementioned problems, this utility model discloses a blue light blocking lens.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a blue light protection lens, comprising a substrate layer, a composite blue light filter layer, a stain-resistant and hydrophobic layer, and an anti-reflective layer; the composite blue light filter layer is composed of a reflective high refractive index layer and an absorptive polymer layer.

[0008] The high refractive index layer is a gradient thin film layer of alternating deposition of titanium dioxide and silicon dioxide, with a single layer thickness of 60-100 nm.

[0009] Furthermore, the substrate layer edge is provided with a microprism array with a tilt angle of 5°-15°.

[0010] In the above scheme, the base surface of the microprism is conformal to the outer edge curved surface of the lens, and a rounded transition structure is provided at the connection between the inclined surface of the prism and the base surface.

[0011] The reflective high refractive index layer is located inside the antifouling and hydrophobic layer, and the absorbent polymer layer is located between the reflective high refractive index layer and the substrate layer; the substrate layer has an embedded ultraviolet absorber layer, and the antireflective layer covers the inner surface of the substrate layer.

[0012] The solution in this embodiment includes a substrate layer, a composite blue light filter layer, a stain-resistant and hydrophobic layer, and an anti-reflective layer. The composite blue light filter layer is composed of a reflective high-refractive-index layer and an absorptive polymer layer. Through the division of labor and synergy between the reflective layer's priority interception of high-energy blue light and the absorptive layer's filling of short-wavelength gaps, the overall blocking efficiency of harmful blue light is significantly improved, while avoiding secondary reflection glare caused by a single reflective layer or severe color shift caused by an absorptive layer. At the same time, based on blue light filtering, the substrate's built-in components simultaneously block ultraviolet rays, achieving "blue light-ultraviolet" composite protection. In addition, the stain-resistant and hydrophobic layer can reduce fingerprint and oil adhesion, reduce cleaning frequency, and extend the optical performance stability of the lens, making up for the shortcomings of traditional coated lenses that are easily contaminated and damaged. Attached Figure Description

[0013] Figure 1 This is a perspective view of the blue light protection lens in the embodiments of this application;

[0014] Figure 2 This is a schematic diagram of the layer structure of the blue light protection lens in the embodiments of this application;

[0015] Figure 3 This is a schematic diagram of the structure of the microprism located at the edge of the lens in an embodiment of this application;

[0016] Figure 4 This is a cross-sectional schematic diagram of the microprism in the embodiments of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in further detail below with reference to the accompanying drawings.

[0018] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be a limitation of the present invention. As used in the specification and appended claims of the present invention, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0019] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0020] Example 1: As Figure 1-2 As shown, a blue light protection lens includes a substrate layer 100, a composite blue light filter layer 200, a stain-resistant and hydrophobic layer 300, and an anti-reflective layer 400; the composite blue light filter layer 200 is composed of a reflective high refractive index layer and an absorptive polymer layer.

[0021] The reflective high refractive index layer is located inside the antifouling and hydrophobic layer 300, and the absorbent polymer layer is located between the reflective high refractive index layer and the substrate layer 100; the substrate layer 100 has an embedded ultraviolet absorber layer, and the antireflective layer 400 covers the inner surface of the substrate layer 100.

[0022] In the specific design: the antifouling and hydrophobic layer 300 uses fluorinated siloxane (SiO2-C6F). 13 The composite coating has a thickness of 8nm; it can reduce surface energy, make the water contact angle ≥110°, reduce fingerprints and oil stains, and suppress external light reflection.

[0023] The composite blue light filter layer 200 includes a reflective high refractive index layer 210 and an absorptive polymer layer 220.

[0024] Among them, the reflective high refractive index layer 210 is a gradient thin film layer of alternating deposition of titanium dioxide and silicon dioxide, with a single layer thickness of 60-100nm; it is directly coated on the inner side of the antifouling and hydrophobic layer 300; through the principle of interference reflection, it selectively reflects harmful short-wavelength blue light of 415-455nm, with a reflectivity ≥85%.

[0025] The absorptive polymer layer 220 is a polycarbonate matrix doped with nano-cerium oxide (CeO2, particle size 30-50nm, doping concentration 1.5wt%); the thickness is 0.25mm; it is sandwiched between the reflective high refractive index layer 210 and the substrate layer 100; it is used to absorb blue light in the 400-420nm band, forming a band complementarity with the reflective layer to reduce the phenomenon of leakage filtering.

[0026] The substrate layer 100 is made of CR-39 resin (containing 0.3wt% benzotriazole UV absorber); it is 1.2mm thick; it is used to block ultraviolet rays below 380nm (blocking rate >99%); and it also serves as the main support structure of the lens.

[0027] The anti-reflection layer 400 is a MgF2 / SiO2 multilayer interference film (total thickness 120nm);

[0028] It covers the inner surface of the substrate layer 100 (closest to the human eye); used to reduce the average reflectivity of visible light in the 450-700nm range to 0.8% and increase the transmittance to 92.5%.

[0029] The preparation process includes:

[0030] The CR-39 resin was mixed with an ultraviolet absorber and injected into a mold, then cured at 80°C. The mold edge was pre-formed with a microprism structure. After demolding, the surface roughness of the substrate layer Ra < 0.01 μm.

[0031] Composite blue light filter layer coating:

[0032] The following layers were sequentially deposited on the outer side of the substrate using an ion-assisted deposition (IAD) process:

[0033] a. Absorbent polymer layer 220: Nano-cerium oxide is dispersed in a polycarbonate solution, spin-coated into a film, and then cured at 120°C;

[0034] b. Reflective high refractive index layer 210: TiO2 thin film was sputtered and deposited under a vacuum of 0.1 Pa.

[0035] Antifouling and hydrophobic coating:

[0036] A fluorinated siloxane solution was sprayed onto the surface of the reflective high refractive index layer 210 and baked at 80°C for 30 minutes to form a nanoscale antifouling layer.

[0037] Anti-reflective layer preparation:

[0038] MgF2 (low refractive index layer) and SiO2 (matching layer) are alternately deposited on the inner side of the substrate by electron beam evaporation to control the film thickness error by ±3nm.

[0039] Example 2: As Figure 3-4 As shown, the substrate layer 100 has a microprism array with an inclination angle of 5°-15° at its edge; wherein, the inclination angle between the inclination surface of the microprism 500 and the central axis of the lens is 5°-15° (preferably 10°) to adapt to the range of blue light incident angles (30°-60°) on the side of the human eye; when blue light enters from the side of the lens at a larger incident angle (such as 30°-60°), the light is refracted or totally reflected at the inclination surface of the microprism, changing the direction of propagation and preventing it from directly penetrating the lens and entering the eye.

[0040] The base surface of the microprism 500 conforms to the outer curved surface of the lens, and a rounded transition structure is provided at the connection between the inclined surface of the prism and the base surface. The base surface of the microprism conforms to the outer curved surface of the lens (i.e., the curvature of the base surface is consistent with the outer edge of the lens), ensuring that there are no gaps when the prism array is assembled with the frame, avoiding structural abruptness or affecting aesthetics;

[0041] The junction between the prism's inclined surface and the base surface is provided with a rounded transition (rounded radius R = 5-20μm), replacing the traditional right-angle connection and reducing the risk of stress concentration.

[0042] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An anti-blue light lens, characterized in that: It includes a substrate layer (100), a composite blue light filter layer (200), a stain-resistant and hydrophobic layer (300), and an anti-reflective layer (400); the composite blue light filter layer (200) is composed of a reflective high refractive index layer (210) and an absorptive polymer layer (220).

2. The blue blocking lens of claim 1, wherein: The high refractive index layer (210) is a gradient thin film layer of alternating deposition of titanium dioxide and silicon dioxide, with a single layer thickness of 60-100 nm.

3. The blue blocking lens of claim 1, wherein: The substrate layer (100) has a microprism array with an inclination angle of 5°-15° at its edge.

4. The blue blocking lens of claim 3, wherein: The (500) base surface of the microprism conforms to the outer edge curved surface of the lens, and a rounded transition structure is provided at the connection between the inclined surface of the prism and the base surface.

5. The blue blocking lens of claim 1, wherein: The reflective high refractive index layer (210) is located inside the antifouling and hydrophobic layer (300), and the absorbent polymer layer (220) is located between the reflective high refractive index layer (210) and the substrate layer (100); the substrate layer (100) has an embedded ultraviolet absorber layer, and the antireflective layer (400) covers the inner surface of the substrate layer (100).

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