Polarized spectacle lens

Abstract

The utility model relates to the field of optical lenses, in particular to a polarized glasses lens which comprises a first coating layer, a first reinforcing layer, a polarized layer, a color layer, a light conversion layer, a second hardening layer and a second coating layer which are sequentially arranged in a stacked mode in the light incidence direction. The first reinforcing layer adopts a specific film and is bonded through optical transparent ultraviolet curing, the polarization layer is a linear polarizer with a specific structure and forms a certain included angle with the light conversion layer, the color layer is a blue light, color light and other light filtering layer, and the light conversion layer adopts a cellulose triacetate film subjected to uniaxial stretching treatment. The second hardening layer is an ultraviolet curing resin layer, and the second coating layer is an anti-reflection and anti-reflection film layer so as to improve light transmittance and reduce reflection. Various technical effects of resisting reflection, enhancing the strength of the lens, realizing a polarization function, filtering blue light, converting a light polarization state, depolarizing and the like are achieved.

Description

Technical Field

[0001] This application relates to the field of optical lenses, and in particular to a polarized eyeglass lens. Background Technology

[0002] Polarized glasses hold a significant position in the field of eyewear technology. With increasing outdoor activities, the demand for protective eyewear is also rising. Polarized glasses must not only block excessive sunlight from directly hitting the eyes but also ensure users can clearly see their surroundings, which is crucial for protecting eye health and enhancing visual experience. They are widely used in outdoor sports such as skiing and are also favored by many consumers for everyday use, driving the diversification of products in the eyewear industry.

[0003] To meet the need for preventing strong glare from directly hitting the eyes while ensuring clear vision, sunglasses, outdoor ski goggles, and other similar products currently use polarizing filters. Among these, linear polarizing filters are mostly chosen due to cost considerations. Linear polarizing filters effectively regulate light intensity, reducing the intensity of natural light after it passes through, allowing the wearer to see relatively comfortably even in strong light. In addition, circular polarizing filters are also used in the industry, typically achieved by adding a quarter-glass plate to a linear polarizing filter, thus optimizing the protection of linearly polarized light from eye damage.

[0004] However, existing polarizer solutions have significant drawbacks. While the widely used linear polarizers can adjust light intensity, natural light passing through them undergoes a single linear polarization, transforming the various polarization states of natural light into a single-vibration ray. Prolonged exposure to this single-vibration ray can damage the human eye's physiological functions. While circular polarizers can reduce eye damage, their expensive quarter-glass slide manufacturing process makes large-scale production in eyeglasses difficult. Furthermore, in addition to ultraviolet light, the low-wavelength blue light spectrum in the solar spectrum also poses a significant risk to the eyes, especially affecting children and adolescents; existing polarizer solutions provide insufficient protection against this. Utility Model Content

[0005] The purpose of this application is to provide a polarized eyeglass lens to address the shortcomings of existing polarized lenses in terms of synergy in strong light protection, structural strength, polarization state conversion, and multi-band light filtering.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a polarized eyeglass lens, wherein a first coating layer, a first reinforcing layer, a polarizing layer, a color layer, a light conversion layer, a second hardening layer, and a second coating layer are sequentially stacked along the incident light direction, wherein the polarization axis direction of the polarizing layer forms a certain angle with the molecular orientation direction of the light conversion layer.

[0007] By adopting the above technical solution, the various structural layers work synergistically: the first coating layer reduces strong light incidence through color reflection, and the second coating layer improves light transmittance through anti-reflection and anti-reflection; the two work together to optimize the light incidence state. The first reinforcing layer enhances the mechanical strength of the lens and ensures structural stability. The polarizing layer realizes the basic polarization function, laying the foundation for subsequent polarization state conversion. The color layer specifically filters blue light and specific colors of light to reduce eye damage. The light conversion layer converts linearly polarized light into a multi-directional vibrating polarization state, avoiding the harm of single-polarized light. The second hardening layer improves the lens's abrasion resistance and extends its service life. The angle between the polarization axis and the molecular orientation of the light conversion layer ensures that linearly polarized light is incident on the light conversion layer at a suitable angle, providing an optical basis for efficient polarization state conversion and taking into account the synergy between polarization effect and subsequent conversion function. Overall, through the organic combination of multiple layers, comprehensive optimization of protection, strength, and optical performance is achieved.

[0008] Optionally, the first coating layer is a color-reflective coating, using at least one of silicon oxide or titanium oxide as the film material.

[0009] By adopting the above technical solutions, silicon dioxide and titanium dioxide, as stable optical film materials, can reduce the direct incidence of strong light through their color reflective properties. At the same time, the chemical stability of the film materials ensures that the reflective effect does not decay during long-term use. In conjunction with the subsequent layer structure, they provide the first strong light protection barrier for the lens, which not only meets the requirements of visual comfort, but also avoids excessive light blocking from affecting the clarity of vision.

[0010] Optionally, the first reinforcing layer is made of polycarbonate film with a thickness of 0.1mm to 1.0mm, and is bonded and fixed to the adjacent first coating layer and polarizing layer by optically transparent ultraviolet curable adhesive.

[0011] By adopting the above technical solutions, the polycarbonate film has high impact resistance, and the thickness design of 0.1mm~1.0mm ensures structural strength while avoiding excessive lens thickness; the optically transparent UV-curable adhesive not only has strong adhesion, but also has excellent light transmittance and weather resistance, ensuring no air bubbles or light scattering between layers, which not only enhances the overall deformation resistance of the lens, but also does not interfere with the transmission of light between layers, achieving a balance between structural strength and optical performance.

[0012] Optionally, the polarizing layer is a linear polarizer, employing an ultra-high temperature resistant polarizing film, which is composed of a polyvinyl alcohol polarizing layer sandwiched between two layers of triacetate cellulose ester protective film.

[0013] By adopting the above technical solutions, the ultra-high temperature resistant polarizing film improves the stability of the lens in high-temperature environments and avoids the degradation of polarization performance; the triacetate cellulose ester protective film enhances the abrasion resistance and moisture resistance of the polarizing layer and extends its service life.

[0014] Optionally, the color layer is a blue light or colored light filter layer, which achieves selective absorption of colored wavelength light by adding a light absorber to the resin substrate or by using a vacuum-deposited metal oxide filter film.

[0015] By adopting the above technical solutions, the two filtering methods can be flexibly adapted to different scenarios: adding light absorbers is a simple and low-cost process, suitable for large-scale mass production; while vacuum-deposited metal oxide filter films offer higher filtering precision and greater durability. This layer can filter harmful blue light and selectively absorb specific colors of light, reducing stray light interference. It protects the eyes while optimizing the visual experience, and works in conjunction with other layer structures to achieve precise control of multi-band light.

[0016] Optionally, the light conversion layer is a uniaxially stretched cellulose triacetate film with a stretching ratio of 1.0 to 5 times; the light conversion layer can convert incident linearly polarized light into at least one polarization state including circularly polarized light, elliptically polarized light, partially polarized light, or natural light.

[0017] By adopting the above technical solution, unidirectional stretching enables cellulose triacetate molecules to arrange themselves in an orderly manner, forming stable birefringence properties. The stretching ratio of 1.0 to 5 times can adapt to different polarization state conversion requirements. High light transmittance ensures minimal light loss, while the multi-polarization state conversion function avoids long-term damage to the human eye from unidirectional polarized light. Compared with the traditional circular polarizer solution, it has a lower cost and, in conjunction with the polarizing layer and color layer, constructs a complete optical path from "filtering-polarization-conversion", improving the eye protection effect.

[0018] Optionally, the second hardening layer is an ultraviolet-cured resin layer.

[0019] By adopting the above technical solution, the UV-cured resin layer forms a hard surface after curing, which can effectively resist scratches caused by daily friction and collision, and protect the internal functional layers from damage; at the same time, its optical transparency ensures that there is no additional refraction or scattering when light passes through, and does not affect the optical effect of the preceding layers, thus improving the durability of the lens while maintaining the stability of the overall optical performance.

[0020] Optionally, the second coating layer is an antireflective coating layer, used to improve light transmittance and reduce reflection.

[0021] By adopting the above technical solution, the second coating layer, as the last optical structure on the light-emitting side of the lens, can reduce the reflection loss when light is emitted, improve the light transmission efficiency, and at the same time form a synergy of "reflective protection-enhanced light transmission" with the first coating layer on the incident side. This reduces the incidence of strong light while ensuring that effective light can pass through fully, optimizing the wearer's visual clarity. In conjunction with other layer structures, it achieves full-process optimization of light "entry-filtering-transfer-exit".

[0022] In summary, this application has at least the following beneficial effects:

[0023] 1. Synergistic effect of each layer: The first coating layer reduces strong light incidence through color reflection, while the second coating layer improves light transmittance through anti-reflection and anti-reflection effects. Together, they optimize light incidence. The first reinforcing layer enhances the lens's mechanical strength, ensuring structural stability. The polarizing layer provides basic polarization, laying the foundation for subsequent polarization state conversion. The color layer specifically filters blue light and specific colors of light, reducing eye damage. The light conversion layer converts linearly polarized light into a multi-directionally vibrating polarization state, avoiding the harmful effects of single-polarized light. The second hardening layer improves the lens's abrasion resistance and extends its lifespan. Overall, through the organic combination of multiple layers, comprehensive optimization of protection, strength, and optical performance is achieved.

[0024] 2. Two filtering methods flexibly adapt to different scenarios: Adding light absorbers is a simple and low-cost process, suitable for large-scale mass production; vacuum-deposited metal oxide filter films offer higher filtering precision and are more durable. This layer can filter harmful blue light and selectively absorb specific colors of light, reducing stray light interference. It protects the eyes while optimizing the visual experience, and works in conjunction with other layer structures to achieve precise control of multi-band light. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a polarized eyeglass lens.

[0026] Figure Labels

[0027] 1. First coating layer; 2. First reinforcing layer; 3. Polarizing layer; 4. Color layer; 5. Light conversion layer; 6. Second hardening layer; 7. Second coating layer. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0029] This application mainly adopts a multi-layer composite lens structure to improve the overall performance, achieving the effects of reducing strong light incidence, strengthening structural strength, optimizing polarization state, filtering specific light rays, and improving light transmission efficiency. The following is a further detailed description of this application.

[0030] Example 1

[0031] Reference Figure 1The polarized eyeglass lens provided in this application includes a first coating layer 1, a first reinforcing layer 2, a polarizing layer 3, a color layer 4, a light conversion layer 5, a second hardening layer 6, and a second coating layer 7, which are stacked sequentially along the direction of light incidence. This structure, through the synergistic effect of each layer, achieves comprehensive functions including strong light protection, structural reinforcement, polarization control, multi-band filtering, polarization state conversion, and light transmission optimization, thus improving the practicality and eye protection effect of the lens. The specific functions of each layer are as follows: the first coating layer 1 reduces strong light incidence; the first reinforcing layer 2 enhances structural stability; the polarizing layer 3 achieves basic polarization; the color layer 4 filters specific light; the light conversion layer 5 optimizes the polarization state; the second hardening layer 6 improves abrasion resistance; and the second coating layer 7 reduces reflection and improves light transmittance.

[0032] Specifically, the first coating layer 1 is a color-reflective coating, using at least one of silicon oxide or titanium oxide as the film material, such as a "colored reflective coating" or a "colored anti-reflective coating." These two film materials have stable optical properties and can reduce the direct incidence of strong external light into the lens through their color-reflective characteristics, providing a comfortable light intensity environment for the wearer. In addition to the above-mentioned film materials, other optical film materials with color-reflective properties, such as silicon nitride, can also be used.

[0033] The first reinforcing layer 2 is made of polycarbonate film with a thickness of 0.1mm to 1.0mm, such as "PC reinforcing film" or "polycarbonate support layer" (PC is short for polycarbonate). Polycarbonate material has excellent impact resistance and light transmittance. The 0.1mm to 1.0mm thickness design ensures the structural strength of the lens while avoiding excessive thickness that would make it heavy to wear. It is bonded and fixed to the adjacent first coating layer 1 and polarizing layer 3 by an optically transparent ultraviolet curable adhesive. This adhesive layer has high light transmittance, strong adhesion, and strong weather resistance, ensuring no air bubbles or light scattering between layers. This not only enhances the overall deformation resistance of the lens but also does not interfere with light transmission.

[0034] Polarizing layer 3 is a linear polarizer, employing an ultra-high temperature resistant polarizing film. It consists of a polyvinyl alcohol polarizing layer sandwiched between two layers of cellulose triacetate protective films, such as a "temperature-resistant linear polarizer" or a "PVA-TAC composite polarizing layer" (PVA stands for polyvinyl alcohol, and TAC stands for cellulose triacetate). The ultra-high temperature resistant polarizing film enhances the lens's stability in high-temperature environments, preventing polarization performance degradation; the cellulose triacetate protective film enhances the abrasion resistance and moisture resistance of polarizing layer 3, extending its service life. The polarization axis of polarizing layer 3 forms a certain angle with the molecular orientation of light conversion layer 5. This angle ensures that linearly polarized light is incident on light conversion layer 5 at a suitable angle, providing a basis for polarization state conversion. Besides the above structure, other types of ultra-high temperature resistant polarizing films can also be used as the core functional layer.

[0035] Color layer 4 is a blue light and colored light filtering layer. It achieves selective absorption of different wavelengths of light by adding light absorbers to the resin substrate or by using vacuum-deposited metal oxide filter films, such as a "multi-band filter layer" or a "blue light-colored light composite filter layer." Adding light absorbers is a simple and low-cost method suitable for mass production; vacuum-deposited metal oxide filter films offer higher filtering precision and greater durability. This layer can filter harmful blue light while selectively absorbing specific colors of light, reducing stray light interference and balancing eye protection with visual clarity.

[0036] The light conversion layer 5 is a uniaxially stretched cellulose triacetate film with a stretching ratio of 1.0 to 5 times, such as a "uniaxially stretched TAC polarization conversion film" or a "stretched cellulose triacetate polarization state adjustment layer." Uniaxial stretching causes the film molecules to align in an orderly manner along the stretching direction, forming stable optical birefringence properties. This converts incident linearly polarized light into at least one polarization state, including circularly polarized light, elliptically polarized light, partially polarized light, or natural light, avoiding long-term damage to the human eye from unidirectionally polarized light. The stretching ratio of 1.0 to 5 times can be adjusted according to actual polarization state conversion requirements to ensure the conversion effect is suitable for different application scenarios. In addition to the above-mentioned film, other polymer films with similar birefringence properties after uniaxial stretching can also be selected.

[0037] The second hardening layer 6 is a UV-curable resin layer, formed through a coating and curing process, such as a "UV-cured hardening layer" or "UV-cured wear-resistant layer" (UV is short for ultraviolet light). After curing, this layer has high surface hardness, which can effectively resist scratches caused by daily friction and collision, and protect the internal functional layers from damage; at the same time, its optical transparency ensures that there is no additional refraction or scattering when light passes through, and does not affect the optical effect of the preceding layers.

[0038] The second coating layer 7 is disposed on the side of the second hardening layer 6 away from the light conversion layer 5, and is an anti-reflective coating layer, such as an "anti-reflective coating" or a "light transmission enhancement anti-reflective layer". It can reduce the reflection loss of light when it is emitted from the lens, improve the light transmission efficiency, and form a synergistic effect with the first coating layer 1 of "incident side reflection protection - outcrystallization and efficiency enhancement": it reduces the incidence of strong light and ensures that effective light is fully transmitted, significantly improving the wearer's visual clarity.

[0039] The implementation principle of this embodiment is as follows: This polarized eyeglass lens achieves multi-layer synergy through a stacked structure of "first coating layer 1 → first reinforcing layer 2 → polarizing layer 3 → color layer 4 → light conversion layer 5 → second hardening layer 6 → second coating layer 7". The first coating layer 1 reduces strong light incidence, the first reinforcing layer 2 ensures structural stability, the polarizing layer 3 achieves basic polarization, the color layer 4 filters harmful light, the light conversion layer 5 optimizes the polarization state, the second hardening layer 6 improves abrasion resistance, and the second coating layer 7 enhances light transmission efficiency. Compared with existing technologies, this structure avoids damage to the human eye from single-polarized light and achieves multi-performance integration through low-cost materials and processes, improving the practicality and mass production feasibility of the lens.

[0040] Example 2

[0041] The difference between this embodiment and Embodiment 1 is that the light conversion layer 5 uses a liquid crystal polymer film with a special orientation treatment. This film forms birefringence properties through molecular orientation control, and can also convert incident linearly polarized light into at least one polarization state including circularly polarized light, elliptically polarized light, partially polarized light, or natural light. The liquid crystal polymer film has good flexibility, and the molecular orientation precision can be adjusted according to needs. In some scenarios, it has a better polarization state conversion efficiency than cellulose triacetate film, providing more options for lens design.

[0042] The implementation principle of this embodiment is as follows: a liquid crystal polymer film is used as the light conversion layer 5. The polarization state conversion function is realized by molecular orientation control. In synergy with other layer structures, it can also achieve the effect of reducing damage from single polarized light and optimizing light performance, further expanding the range of materials to be selected for the lens.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A polarized eyeglass lens, characterized in that, A first coating layer (1), a first reinforcing layer (2), a polarizing layer (3), a color layer (4), a light conversion layer (5), a second hardening layer (6), and a second coating layer (7) are sequentially stacked along the incident direction of light. The polarizing axis of the polarizing layer (3) forms a certain angle with the molecular orientation direction of the light conversion layer (5).

2. The polarized eyeglass lens according to claim 1, characterized in that, The first coating layer (1) is a color reflective coating, using at least one of silicon oxide or titanium oxide as the film material, which is used to reduce strong light incident by reflecting light.

3. A polarized eyeglass lens according to claim 1, characterized in that, The first reinforcing layer (2) is made of polycarbonate film with a thickness of 0.1mm to 1.0mm, and is bonded and fixed to the adjacent first coating layer (1) and polarizing layer (3) by optically transparent ultraviolet curing adhesive.

4. A polarized spectacle lens according to claim 1, characterized in that, The polarizing layer (3) is a linear polarizer, which is made of ultra-high temperature resistant polarizing film, consisting of a polyvinyl alcohol polarizing layer sandwiched between two layers of triacetate cellulose ester protective film.

5. A polarized spectacle lens according to claim 1, characterized in that, The color layer (4) is a blue light and color light filtering layer. By adding a light absorber to the resin substrate or by using a vacuum-deposited metal oxide filter film, selective absorption of color wavelength light is achieved.

6. A polarized spectacle lens according to claim 1, characterized in that, The light conversion layer (5) is a uniaxially stretched cellulose triacetate film with a stretching ratio of 1.0 to 5 times; the light conversion layer (5) can convert incident linearly polarized light into at least one polarization state including circularly polarized light, elliptically polarized light, partially polarized light or natural light.

7. A polarized spectacle lens according to claim 1, characterized in that, The second hardening layer (6) is an ultraviolet-cured resin layer.

8. A polarized spectacle lens according to claim 1, characterized in that, The second coating layer (7) is an anti-reflective coating layer, which is used to improve light transmittance and reduce reflection.

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