Multilayer optical disk with a multitude of polygonal meshes and their manufacturing process

Abstract

The invention relates to a multilayer optical disk with a plurality of polygonal meshes, comprising a substrate, a plurality of polygonal meshes, a multilayer film, and two dirt- and water-protection layers. The polygonal meshes are formed on one side of the substrate by alternating stacking of a plurality of materials with a high refractive index and a plurality of materials with a low refractive index. The multilayer film is formed on the side of the substrate facing away from the polygonal meshes by alternating stacking of a plurality of materials with a high refractive index and a plurality of materials with a low refractive index. The two dirt- and water-protection layers are applied to both sides of the substrate to cover the polygonal meshes and the multilayer film.This allows the invention to effectively resist glare and block scattered light, and it exhibits a light compensation effect, thus reducing the time required for the eyes to adapt to brightness and darkness. Furthermore, the invention can more effectively block ultraviolet, violet, blue, and near-infrared light while maintaining high transmittance of visible light.

Description

Technical field

[0001] The invention can be applied to spectacle lenses, insulating paper, screen protectors, etc., and relates to a multilayer optical disc with a plurality of polygonal meshes and its manufacturing process. The plurality of polygonal meshes effectively resist glare and block scattered light, exhibiting a light compensation effect so that the eyes have shorter adaptation times to brightness and darkness. Simultaneously, they can effectively block ultraviolet, violet, and blue light in the 280-500 nm range and near-infrared light in the 760-2000 nm range, while maintaining high transmittance of visible light. State of the art

[0002] Most ultraviolet light comes from sunlight. Blocking ultraviolet light has become a necessary condition for survival for modern humans. Ultraviolet light is the part of the sunlight spectrum that has shorter wavelengths than visible light. Depending on the wavelength, ultraviolet light can be divided into UV-A (320 to 400 nm), UV-B (280 to 320 nm), and UV-C (100 to 280 nm). UV-C (100 to 280 nm) is effectively blocked by the ozone layer, and no UV-C damage occurs. UV-B can cause cataracts, nebulae, snow blindness, photokeratitis, retinopathy, and other conditions. UV-A has the lowest energy, and skin tanning is caused by UV-A. The shorter the wavelength, the higher the energy and the greater the damage. The lens of the eye absorbs most of the ultraviolet light, preventing it from entering the eyeball and thus avoiding damage to the retina.Because the lens, which performs this "protective mechanism," absorbs ultraviolet light, the insoluble protein content in its fibers gradually increases, leading to the formation of cataracts. With the development of science and technology, people are becoming increasingly dependent on 3C products. Ultraviolet, violet, and blue light with wavelengths between 280 and 500 nm have high energy. Prolonged exposure to light in this range affects the health of the retina. Many 3C products, such as flat screens, LED neon lights, fluorescent lamps, computer monitors, mobile phone screens, etc., contain unusually high-energy blue light in their light sources, which is excited by electron flow. Previous technologies only blocked ultraviolet and blue light.According to the literature review "Chinese Medical Association Criteria for Identifying Cataracts Caused by Heat Radiation," the absorption of infrared light by the iris increases when the wavelength of the infrared light is between 760 and 2000 nm. The iris and lens absorb the radiant heat energy that reaches the eye. Excessive exposure leads to burns. Furthermore, the iris is quite sensitive to temperature. Powerful infrared rays can cause severe eye pain. Even with short-term exposure to powerful near-infrared light sources, the heat energy conducted by the iris is still the primary cause of cataracts. Long-term exposure to low-energy infrared light sources causes chronic cataract lesions because the lens directly absorbs heat energy. High-intensity infrared light can damage proteins.Normally, proteins must be arranged precisely for the eye's lens to be clear and for light to be focused through it. If the protein is damaged and irregularly arranged, the lens becomes cloudy, a condition commonly known as a cataract. Over time, the area or concentration of the cloudiness increases, leading to a decrease in the lens's light transmission and ultimately to visual impairment.

[0003] Furthermore, sunlight typically radiates in all directions. When it strikes an object, the light is reflected, creating two types of reflected light: horizontal and vertical. The horizontally reflected light mentioned above is dazzling, randomly reflected light, also known as horizontal glare. It's the useless light that truly impairs vision and causes glare. What makes this type of horizontal glare even more dangerous is that it can cause temporary blindness. If a driver is exposed to strong horizontal glare while driving, leading to temporary blindness, they can no longer see the road ahead clearly, creating a hazard for both the driver and other road users. The characteristic of polarized glasses is that they filter out all horizontally reflected light and only allow vertically incident light to pass through.When driving on a road from dusk until nightfall, the human eye can generally adapt to the changes in light during this time. However, as when suddenly entering a tunnel or driving along a long boulevard, the eyes may be unable to see for a short period. This is because the human eye has its own difficulties adapting to light and darkness. Light adaptation refers to the adjustment time from a dark to a bright environment, which takes approximately a few seconds to several tens of seconds. However, adaptation to a dark environment—that is, the adjustment time from a bright to a dark environment—takes several minutes to several minutes.Therefore, if you wear polarized sunglasses in bright sunlight and then enter a tunnel, boulevard, or the lower level of a three-dimensional, multi-layered street in a modern city, you will experience a greater dark-to-light adaptation because there is no vertical light and the horizontal light is blocked. Serious traffic accidents are a persistent problem.

[0004] From CN 1 19 620 433 A, a multilayer optical glare-control lens with a plurality of polygonal meshes is known, comprising: a substrate, a multilayer film produced on one side of the substrate using a vacuum coating process and formed by alternating stacking of high-refractive-index material and low-refractive-index material, a plurality of polygonal meshes, a multilayer film produced on the side of the substrate facing away from the polygonal meshes using a vacuum coating process and formed by alternating stacking of high-refractive-index material and low-refractive-index material, and a water-protection layer produced using a vacuum coating process, wherein a water-protectant is applied to the outside of the polygonal meshes.which causes the multiple polygonal meshes to be covered by the waterproof layer.

[0005] From DE 10 2021 204 079 A1, a multilayer optical lens, particularly for spectacle lenses, is known, comprising: a substrate, a multilayer film produced on the substrate using a vacuum coating process and formed by alternating stacking of a variety of materials with a high refractive index and a variety of materials with a low refractive index, which blocks ultraviolet light, violet light and blue light in the range of 280 to 500 nm and near-infrared light in the range of 760 to 2000 nm, and a dirt and water protection layer produced using a vacuum coating process, wherein the dirt and water protection layer is applied to the outside of the multilayer film, whereby the multilayer film is located between the dirt and water protection layer and the substrate.

[0006] From EP 3 561 580 A1, a multilayer spectacle lens is known, comprising: a substrate, a multilayer film produced on the substrate using a vacuum coating process and formed by alternating stacking of a variety of high refractive index materials and a variety of low refractive index materials, which blocks ultraviolet light, violet light and blue light in the range of 280 to 500 nm and near-infrared light in the range of 760 to 2000 nm, and dirt and water protection layers produced using a vacuum coating process, wherein the water repellent is applied to the outside of the multilayer film, whereby the multilayer film is located between the dirt and water protection layer and the substrate.

[0007] Against this background, the inventor of the present invention has actively researched and conducted experiments with regard to the problems mentioned above in order to develop and design the present invention. Object of the invention

[0008] The object of the invention is to solve the problem of damage to the human eyes in daily life caused by ultraviolet light, violet light and blue light in the range of 280-500 nm and near-infrared light in the range of 760-2000 nm and the problem of the poor adaptation to brightness and darkness of conventional polarized glasses.

[0009] The multilayer optical disk with a multitude of polygonal meshes comprises: a substrate; a multitude of polygonal meshes produced on one side of the substrate using a vacuum coating process and formed by alternating stacking of a multitude of high-refractive-index materials and a multitude of low-refractive-index materials, enabling them to effectively resist glare and block scattered light; a multilayer film produced on the side of the substrate facing away from the polygonal meshes using a vacuum coating process and formed by alternating stacking of a multitude of high-refractive-index materials and a multitude of low-refractive-index materials, enabling it to effectively block ultraviolet, violet, and blue light in the 280–500 nm range and near-infrared light in the 760–2000 nm range;and two dirt and water protection layers produced using a vacuum coating process, wherein the water repellent is applied to the outside of the polygonal meshes and the multilayer film, whereby the multiple polygonal meshes are covered by one of the dirt and water protection layers and the substrate, and the multilayer film is located between the other dirt and water protection layer and the substrate.

[0010] The manufacturing process of a multilayer optical disk with a plurality of polygonal meshes according to the invention comprises the following steps: providing a substrate; coating with photoresist: one side of the substrate is uniformly coated with a photoresist, wherein, after the coating is complete, the coated substrate is softened by baking; exposure: the photoresist-coated substrate is placed in an exposure machine to expose the photoresist using an exposure process parameter, a light source, and a photomask with patterns, wherein the exposed substrate is placed in an oven and a curing process is carried out;Development: A developing unit is used to clean the exposed photoresist on the substrate to create a photoresist layer with a patterned effect according to the photomask. The developed substrate is washed with deionized water to remove any residual developer solution from the substrate and the photoresist layer. Vacuum coating: Two multilayer films are formed on one side of the substrate with the photoresist layer and on the other side of the substrate. Photoresist removal: A photoresist removal solution is used to remove the photoresist from one side of the substrate. Simultaneously with the removal of the photoresist layer, the multilayer film applied on top of the photoresist layer is also removed, leaving the multilayer film on the substrate to form the multiple polygonal meshes.and coating of the dirt and water protection layers: a vacuum coating process is used to apply a water repellent to the outside of the substrate.;

[0011] The multilayer optical disc with a multitude of polygonal meshes and its manufacturing process according to the invention can effectively resist glare and block scattered light due to the multitude of polygonal meshes, and exhibit a light compensation effect, thus reducing the time required for the eyes to adapt to brightness and darkness. Since the multilayer film is made of materials with high and low refractive indices, the invention can effectively block ultraviolet, violet, and blue light in the 280-500 nm range and near-infrared light in the 760-2000 nm range, while maintaining high transmittance of visible light. Brief description of the drawings Fig. 1. A representation of the structure of the invention, Fig. 2 a description of the manufacturing process of the invention, Fig. 3 a diagram comparing the anti-reflection light, anti-ultraviolet light, anti-violet light, anti-blue light and anti-infrared light spectrum of the invention with the anti-reflection film spectrum of the prior art, Fig. 4 a representation of the dimensions of the polygonal meshes (honeycomb meshes) of the invention. Ways to implement the invention

[0012] Fig. Figure 1 shows a representation of the structure of the multilayer optical disk with a plurality of polygonal meshes of the invention, comprising a substrate 10, a plurality of polygonal meshes 20, a multilayer film 30 and two dirt and water protection layers 40.

[0013] The material of substrate 10 can be glass, PC, PMMA or resin (CR39, MR7, MR8, MR174).

[0014] The polygonal meshes 20 are produced on one side of the substrate 10 using a vacuum coating process and are formed by alternating stacking of a variety of high-refractive-index materials and a variety of low-refractive-index materials. They ideally have a hexagonal shape, so that the overall shape is honeycomb-like (as in Fig. (Figure 4). The height of each polygonal mesh 20 is 0.3–0.6 mm and the width is 0.18–0.48 mm. The distance between the centers of two horizontally adjacent polygonal meshes 20 is 0.38–0.68 mm. The distance between the centers of two vertically adjacent polygonal meshes 20 is 0.33–0.63 mm. When applied to eyeglasses, it can be reduced proportionally. When applied to insulating paper on a windshield or glass intended to prevent horizontal glare when looking at the sea, it can be enlarged proportionally. The material has a high refractive index of 2 to 3 and is one or more oxides with an extinction coefficient close to 0, such as... Examples include Ti3O5, TiO2, Ta2O5, Nb2O5, etc. Low refractive index materials have a refractive index of 1.3 to 2 and are one or more oxides with an extinction coefficient close to 0, such as SiO2, MgF2, etc.This allows the multitude of polygonal meshes to effectively resist glare and block stray light.

[0015] The multilayer film 30 is produced on one side of the substrate 10, facing away from the polygonal meshes 20, using a vacuum coating process and is formed by alternately stacking a variety of high-refractive-index materials and a variety of low-refractive-index materials. The high-refractive-index material has a refractive index of 2 to 3 and is one or more oxides with an extinction coefficient close to 0, such as Ti3O5, TiO2, Ta2O5, Nb2O5, etc. The low-refractive-index material has a refractive index of 1.3 to 2 and consists of one or more oxides with an extinction coefficient close to 0, such as SiO2, MgF2, etc. This allows the multilayer film 30 to have anti-reflective, anti-ultraviolet, anti-violet, anti-blue, and anti-infrared light properties.

[0016] The two dirt and water protection layers 40 are produced using a vacuum coating process, wherein the water repellenant is applied to the outside of the polygonal meshes 20 and the multilayer film 30. The multiple polygonal meshes 20 are covered by one of the dirt and water protection layers 40 and the substrate 10. The multilayer film 30 is located between the other dirt and water protection layer 40 and the substrate 10.

[0017] Fig. Figure 2 shows the manufacturing process of the multilayer optical disk with a plurality of polygonal meshes of the present invention, which comprises the following steps: Providing a substrate: The substrate material can be glass, PC, PMMA or resin (CR39, MR7, MR8, MR174). Photoresist coating: One side of the substrate is evenly coated with photoresist. After coating, the substrate is placed in an oven and cured using a soft-bake parameter. Photoresist coating can be performed with a spin coater or a spray coater. Any equipment capable of evenly applying the photoresist to the substrate can be used, but it is not limited to this. Either positive or negative photoresist can be selected. Exposure: The photoresist-coated substrate is placed in an exposure machine to expose the photoresist using an exposure process parameter, a light source, and a photomask with patterns. The exposed substrate is then placed in an oven. A curing process is performed using a curing parameter. The exposure machine can be an aligner or similar device. Any equipment capable of achieving the required pattern resolution and exposure conditions can be used, but it is not limited to this. The photomask features a variety of polygonal patterns, preferably hexagons. The hexagons of the multiple polygonal patterns on the photomask can also alternate between positive and negative. After the photoresist is removed, the multiple hexagons of the multilayered film do not abut each other but form bridging connections. Development: A developing unit is used to clean the exposed photoresist on the substrate, which has been cured during the hardening process, to create a photoresist layer with a pattern effect corresponding to the photomask. The developed substrate is washed with deionized water to remove any residual developer solution from the substrate and the photoresist layer. One or a combination of spraying, soaking, rinsing, ultrasonic vibration, etc., can be used to clean the developer. However, it is not limited to these methods. The developer cleans the exposed photoresist, creating a photoresist layer with a pattern effect corresponding to the photomask. In the case of negative photoresist, the unexposed portion dissolves in the developer. The portion exposed to UV light does not dissolve in the developer.On the contrary, the unexposed part of the positive photoresist does not dissolve in the developer, while the part exposed to UV light does. The exposure conditions can be adjusted as needed. Vacuum coating: Vacuum coating is applied to both sides of the substrate containing the photoresist layer. Two multilayer films are formed on one side of the substrate containing the photoresist layer and on the other side using either physical vapor deposition (PVD) or chemical vapor deposition (CVD). The two multilayer films are formed by alternating stacks of various materials with a high refractive index and various materials with a low refractive index. The high refractive index material has a refractive index of 2 to 3 and consists of one or more oxides with an extinction coefficient close to 0, such as Ti3O5, TiO2, Ta2O5, Nb2O5, etc. The low refractive index material has a refractive index of 1.3 to 2 and consists of one or more oxides with an extinction coefficient close to 0, such as SiO2, MgF2, etc.The anti-blue light property of the multi-layer films is 10% to 50% and the anti-infrared light property is 30% to 70%. Photoresist Removal: A photoresist removal solution (PR strip) is used to remove the photoresist from one side of the substrate. Simultaneously with the removal of the photoresist layer, the multilayer film applied on top of the photoresist layer is also removed. The multilayer film on the substrate is left intact, forming the multiple polygonal meshes 20 (as shown in Fig. (4 shown). The height of each polygonal mesh 20 is 0.3–0.6 mm and the width is 0.18–0.48 mm. The distance between the centers of two horizontally adjacent polygonal meshes 20 is 0.38–0.68 mm. The distance between the centers of two vertically adjacent polygonal meshes 20 is 0.33–0.63 mm. In this way, the multiple polygonal meshes 20 can effectively resist glare and block scattered light. It also allows the uncoated areas to have a stronger light compensation effect, thus shortening the times for the eyes to adapt to brightness and darkness. When applied to eyeglasses, it can be reduced proportionally. When applied to insulating paper on a windshield or glass intended to prevent horizontal glare when looking at the sea, it can be increased proportionally.The photoresistance removal solution is a solvent combination such as N-methylpyrrolidone (NMP), dimethyl sulfoxide (DMSO), and glycol ethers. However, it is not limited to these. Coating of the dirt and water protection layers: A vacuum coating process is used to apply a water repellent to the outside of the substrate.

[0018] The multilayer optical disc with a multitude of polygonal meshes and its manufacturing process can effectively resist glare and block scattered light through the multitude of polygonal meshes 20, exhibiting a light compensation effect. This effect allows the eyes to adapt to brightness and darkness in shorter periods. Simultaneously, the multilayer film 30 is designed to consist of material with a high refractive index and material with a low refractive index. Therefore, the invention can effectively block ultraviolet, violet, and blue light in the range of 280–500 nm and near-infrared light in the range of 760–2000 nm, while maintaining high transmittance of visible light. Fig.Figure 3 shows a comparison of the anti-reflection light, anti-ultraviolet light, anti-violet light, anti-blue light and anti-infrared light spectrum of the invention with the anti-reflection film spectrum of the prior art. Reference symbol list 10 substrate 20 polygonal mesh 30 multi-layered film 40 Dirt and water protection layer

Claims

[1] Multilayer optical disk with a multitude of polygonal meshes, comprising a substrate (10), a multitude of polygonal meshes (20) produced on one side of the substrate (10) using a vacuum coating process and formed by alternating stacking of a multitude of high refractive index materials and a multitude of low refractive index materials, whereby the polygonal meshes (20) effectively resist glare and block scattered light and exhibit a light compensation effect; a multilayer film (30) produced on the side of the substrate (10) facing away from the polygonal meshes (20) using a vacuum coating process and formed by alternately stacking a variety of high refractive index materials and a variety of low refractive index materials, such that ultraviolet light, violet light and blue light in the range of 280-500 nm and near-infrared light in the range of 760-2000 nm are effectively blocked by the multilayer film (30); and two dirt and water protection layers (40) produced using a vacuum coating process, wherein a water repellent is applied to the outside of the polygonal meshes (20) and the multilayer film (30), whereby the multiple polygonal meshes (20) are covered by one of the dirt and water protection layers (40) and the substrate (10) and the multilayer film (30) is located between the other dirt and water protection layer (40) and the substrate (10). [2] Multilayer optical disk with a plurality of polygonal meshes according to claim 1, characterized by , that the substrate material (10) is glass, PC, PMMA or resin (CR39, MR7, MR8, MR174). [3] Multilayer optical disk with a plurality of polygonal meshes according to claim 1, characterized by , that the polygonal meshes (20) have a hexagonal shape. [4] Multilayer optical disk with a plurality of polygonal meshes according to claim 3, characterized by , that the polygonal meshes (20) form a honeycomb shape. [5] Multilayer optical disk with a plurality of polygonal meshes according to claim 1, characterized by , that the high refractive index material of the polygonal meshes (20) and the multilayer film (30) has a refractive index of 2 to 3 and contains one or more oxides with an extinction coefficient close to 0. [6] Multilayer optical disk with a plurality of polygonal meshes according to claim 5, characterized by that the material has a high refractive index Ti3O5, TiO2, Ta2O5 or Nb2O5. [7] Multilayer optical disk with a plurality of polygonal meshes according to claim 5, characterized by that the material has a low refractive index, either SiO2 or MgF2. [8] Multilayer optical disk with a plurality of polygonal meshes according to claim 1, characterized by , that the height of each polygonal mesh (20) is 0.3-0.6 mm and the width is 0.18-0.48 mm, wherein the distance between the centers of two horizontally adjacent polygonal meshes (20) is 0.38-0.68 mm, and wherein the distance between the centers of two vertically adjacent polygonal meshes (20) is 0.33 to 0.63 mm. [9] Multilayer optical disk with a plurality of polygonal meshes (20) according to claim 8, characterized by , that the height, width, distance between the centers of two horizontally adjacent polygonal meshes (20) and the distance between the centers of two vertically adjacent polygonal meshes (20) can be reduced and increased in the same proportion depending on the application of the product. [10] Manufacturing process of a multilayer optical disk with a plurality of polygonal meshes, comprising the following steps: Providing a substrate; Coating with photoresist: one side of the substrate is evenly coated with a photoresist, and after the coating is complete, the coated substrate is placed in the oven and baked until soft; Exposure: the substrate coated with photoresist is placed in an exposure machine to expose the photoresist with an exposure process parameter, a light source and a photomask with patterns, the exposed substrate being placed in the oven and a curing process being carried out; Development: a developing unit is used to clean the exposed photoresist on the substrate, which has been cured in the curing process, to form a photoresist layer. to create a pattern effect corresponding to the photomask, whereby the developed substrate is washed with deionized water to remove residual developer solution from the substrate and the photoresist layer; Vacuum coating: two multilayer films are formed on the side of the substrate with the photoresist layer and on the other side of the substrate, with the multilayer films effectively blocking ultraviolet light, violet light and blue light in the range of 280-500 nm and near-infrared light in the range of 760-2000 nm; Photoresist removal: a photoresist removal solution is used to remove the photoresist on one side of the substrate, removing the photoresist layer on top of the photoresist layer at the same time. The applied multilayer film is removed, leaving the multilayer film on the substrate and forming the multiple polygonal meshes that effectively resist glare and block scattered light; and coating the dirt and water protection layers: a vacuum coating process is used to apply a water repellent to the outside of the substrate. [11] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 10, characterized by , that the substrate material (10) is glass, PC, PMMA or resin (CR39, MR7, MR8, MR174). [12] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 10, characterized by that the photomask has a variety of polygonal patterns. [13] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 12, characterized by , that the photomask has a multitude of polygonal patterns, whereby the multiple hexagons of the multilayered film do not border each other after the removal of the photoresist, but form bridging connections with each other. [14] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 10, characterized by , that the two multilayer films are formed by alternately stacking a variety of high refractive index materials and a variety of low refractive index materials, wherein the high refractive index material of the polygonal meshes (20) and the multilayer film (30) has a refractive index of 2 to 3 and is one or more oxides with an extinction coefficient close to 0. [15] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 14, characterized by that the material has a high refractive index Ti3O5, TiO2, Ta2O5 or Nb2O5. [16] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 14, characterized by that the material has a low refractive index, either SiO2 or MgF2. [17] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 14, characterized by , that the anti-blue light property of the multi-layered films is 10% to 50% and the anti-infrared property is 30% to 70%. [18] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 10, characterized by, that the height of each polygonal mesh (20) is 0.3-0.6 mm and the width is 0.18-0.48 mm, wherein the distance between the centers of two horizontally adjacent polygonal meshes (20) is 0.38-0.68 mm, and wherein the distance between the centers of two vertically adjacent polygonal meshes (20) is 0.33 to 0.63 mm. [19] Manufacturing method of a multilayer optical disk with a plurality of polygonal meshes according to claim 18, characterized by , that the height, width, distance between the centers of two horizontally adjacent polygonal meshes and the distance between the centers of two vertically adjacent polygonal meshes can be reduced and increased in the same proportion depending on the application of the product.

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