MULTILAYER OPTICAL SHEET HAVING A PLURALITY OF POLYGONAL GRID CELLS AND METHOD FOR MANUFACTURING IT

Abstract

A multilayer optical sheet comprises a substrate (10), a plurality of polygonal grid cells (20), a multilayer film (30), and two antifouling and water-repellent layers. The cells (20) are formed on one surface of the substrate (10) by alternately stacking a plurality of high-refractive-index materials and a plurality of low-refractive-index materials. The film (30) is formed on a surface of the substrate (10) opposite the plurality of cells (20) by alternately stacking a plurality of high-refractive-index materials and a plurality of low-refractive-index materials. The two antifouling and water-repellent layers are formed on two sides of the substrate (10) to enclose the plurality of cells and the film (30) within them. Figure 1

Description

Title of the invention: MULTILAYER OPTICAL SHEET HAVING A PLURALITY OF POLYGONAL GRID CELLS AND THEIR MANUFACTURING METHOD

[0001] CONTEXT OF THE INVENTION

[0002] (a) Technical field of the invention

[0003] The present invention applies to glasses, heat-insulating paper, screen protection films and the like, and relates, in general, to the technical field of multilayer optical sheets having a plurality of polygonal grid cells, and methods of manufacturing them, and more particularly to a multilayer optical sheet having a plurality of polygonal grid cells and a method of manufacturing it, comprising a plurality of polygonal grid cells which effectively resists glare, blocks scattered light, and exhibits additional luminous effects which allow the eyes to shorten the adaptation periods to light and dark, and also effectively blocks ultraviolet, violet and blue light from 280nm to 500nm and near-infrared light in the band from 760nm to 2000nm while maintaining high transmission of visible light.

[0004] (b) Description of the prior art

[0005] Most ultraviolet light comes from sunlight, and blocking ultraviolet light has become essential to human life in the modern world. Ultraviolet light is a part of the solar spectrum with a shorter wavelength than visible light. Ultraviolet light can be divided into UV-A (320 nm to 400 nm), UV-B (280 nm to 320 nm), and UV-C (100 nm to 280 nm) according to their wavelength. UV-C (100 nm to 280 nm) is effectively blocked by the ozone layer and does not cause UV-C-related damage. UV-B can cause cataracts, pterygium, snow blindness, photokeratitis, and retinopathy. UV-A has the lowest energy, and skin tanning is an effect of UV-A. Generally speaking, the shorter the wavelength, the higher the energy and the greater the damage.The lens of our eyes absorbs most ultraviolet light, preventing it from entering the eyeball and thus protecting the retina from damage. However, as the lens, which performs this protective mechanism, absorbs more ultraviolet light, the insoluble protein content of the fibers gradually increases, and cataracts can form. With development... With the advancements in science and technology, people are becoming increasingly dependent on 3C products. Ultraviolet, violet, and blue light with wavelengths between 280nm and 500nm have high energy. Continuous exposure to light in this range impacts retinal health; and many 3C products, including flat panel displays, LED neon lights, fluorescent lamps, computer monitors, and mobile phone screens, all contain abnormally high levels of blue light in their light sources, which are excited by electron beams. Technologies based on previous techniques are only effective at blocking the ultraviolet and blue light portions.However, according to the Chinese Medical Association's study, "Association-Criteria for Identification of Cataracts Caused by Heat Rays," the iris absorbs infrared light most significantly when the iris is in the infrared wavelength range of 760 nm to 2000 nm. The iris and lens absorb the radiant heat energy that strikes the eye, and burns can occur if exposure is excessive. Furthermore, the iris is highly sensitive to temperature, and high-intensity infrared light can cause severe eye pain. Even if exposure to high-intensity near-infrared light is only brief, the heat energy conducted by the iris remains the primary cause of cataracts. As for long-term exposure to low-energy infrared light, the lens directly absorbs the heat energy, leading to chronic cataract disease.High-intensity infrared light can damage proteins, and these proteins typically need to be precisely arranged to ensure the lens is clear and can properly focus light. If the proteins are damaged and arranged in irregular stacks, the lens will become cloudy, a condition commonly known as a cataract. Over time, the area of ​​opacity enlarges or the concentration increases, leading to decreased light transmission through the lens and ultimately resulting in visual impairment.

[0006] In addition to the above, sunlight generally shines in all directions. When it strikes an object, the light is redirected and reflected, forming two types of reflected light: horizontal and vertical. The horizontal reflected light mentioned above is a dazzling random reflected light, also known as horizontal glare, which is the unnecessary light that actually affects the line of sight and causes glare. This horizontal glare is more dangerous and can cause temporary blindness in humans. If a driver encounters horizontal glare entering their eyes while driving, temporary blindness can occur, resulting in an inability to see the road ahead clearly, thus endangering the driver and others. Road users are at risk. The characteristic of general polarized sunglasses is that they filter out all horizontally reflected light, allowing only vertical light to pass through. Generally, when driving on the road from dusk to night, human eyes can still adapt to changes in light during this period. However, when driving and suddenly entering a tunnel or on a long stretch of highway, the eyes cannot see anything for a short time because human eyes have problems adapting to light and dark. Adaptation to light is the period of adjustment from a dark place to a bright place, which takes anywhere from a few seconds to tens of seconds. Adaptation to darkness is the period of adjustment from a bright place to a dark place, and ranges from several minutes to tens of minutes.Therefore, if polarized sunglasses are worn in bright sunlight, when entering a tunnel, boulevard, or lower level of a multi-level road in a modern city, the problems of adapting to darkness and light will become more severe because there is no vertical light and horizontal light is blocked. This will lead to endless problems and serious traffic accidents. Summary of the invention

[0007] The main objective of the present invention is to solve the problems of damage to human eyes caused by ultraviolet, violet and blue light in the wavelength band from 280nm to 500nm and by near-infrared light in the wavelength band from 760nm to 2000nm existing in everyday life, and to improve the problems of conventional polarizing glasses with regard to "light adaptation" and "dark adaptation".

[0008] The present invention provides a multilayer optical sheet having a plurality of polygonal grid cells, comprising a substrate, a plurality of polygonal grid cells, a multilayer film, and two antifouling and water-repellent layers. The polygonal grid cells of the plurality of polygonal grid cells are formed by vacuum application onto a surface of the substrate and are formed by alternately stacking a plurality of high-refractive-index materials and a plurality of low-refractive-index materials to effectively resist glare, block scattered light, and provide a greater light-supply effect, so as to shorten the light-dark adaptation periods for the eyes.The multilayer film is formed by vacuum application to a substrate surface opposite the plurality of polygonal grid cells, and is formed by alternately stacking a plurality of high refractive index materials and a plurality of low refractive index materials to effectively block. Ultraviolet, violet, and blue light in the wavelength band from 280nm to 500nm and near-infrared light in the wavelength band from 760nm to 2000nm. The two antifouling and water-repellent layers are formed by vacuum application by fixing a water-repellent agent to the outside of the plurality of polygonal grid cells and the multilayer film, so that the cells of the plurality of polygonal grid cells are surrounded by one of the antifouling and water-repellent layers, and the substrate and the multilayer film are sandwiched between another antifouling and water-repellent layer and the substrate.

[0009] The present invention provides a method for manufacturing a multilayer optical sheet comprising a plurality of polygonal grid cells, which includes providing a substrate; the process of applying a photosensitive resin, or "photoresist": applying a photosensitive resin evenly to a surface of the substrate, then subjecting the coated substrate to a gentle baking operation; the act of exposing: placing the substrate coated with the photosensitive resin in an exposure device to subject the photosensitive resin to exposure, according to an exposure process parameter, to a light source and with a photomask bearing a pattern, then placing the substrate in a baking oven to perform a hardening and shaping operation; the process of developing: operating a developing machine to clean the photosensitive resin after exposure on the substrate with a developer in order to generate a layer of photosensitive resin having a pattern effect corresponding to the photomask, washing the developed substrate with deionized water to remove the remaining developer on the substrate and the layer of photosensitive resin; the act of carrying out a vacuum application: applying two multilayer films respectively on the surface of the substrate having the photosensitive resin layer and the surface opposite the photosensitive resin layer, the multilayer films effectively blocking ultraviolet, violet and blue light in the wavelength band from 280nm to 500nm and near infrared light in the wavelength band from 760nm to 2000nm; the stripping of the photosensitive resin: applying a photosensitive resin stripping agent to strip and remove the photosensitive resin from the surface of the pattern-bearing substrate, and, at the same time as the photosensitive resin layer is removed, removing the multilayer film attached to a vertex of the photosensitive resin layer, while leaving the multilayer film attached to the substrate to form a plurality of polygonal grid cells, the cells of the plurality of polygonal grid cells (20) effectively resisting glare and blocking scattered light; and the application of anti-fouling and water-repellent coatings: applying a vacuum coating to fix a water-repellent agent to the outermost layers of the substrate.

[0010] The multilayer optical sheet having a plurality of polygonal grid cells, and the method for manufacturing it, provided by the present invention, utilize the plurality of polygonal grid cells to effectively resist glare, block scattered light, and provide a greater light supplement effect in order to shorten the light adaptation and dark adaptation periods for the eyes and uses an arrangement of a plurality of layers of high refractive index materials and low refractive index materials for the multilayer film so as to more effectively block ultraviolet, violet, and blue light in the wavelength band from 280nm to 500nm and near-infrared light in the wavelength band from 760nm to 2000nm, while maintaining high transmission performance for visible light.

[0011] According to another aspect of the invention, with regard to the multilayer optical sheet, a substrate material is one of glass, polycarbonate (PC), poly(methyl methacrylate) (PMMA) or a resin (CR39, MR7, MR8, MR174).

[0012] According to another aspect of the invention, with regard to the multi-layer optical sheet, the cells of the plurality of polygonal grid cells are hexagonal in shape.

[0013] According to another aspect of the invention, with regard to the multi-layer optical sheet, the cells of the plurality of polygonal grid cells have a honeycomb configuration.

[0014] According to another aspect of the invention, with regard to the multi-layer optical sheet, the high refractive index materials of the plurality of polygonal grid cells and the multi-layer film are one or more oxides having a refractive index of 2 to 3 and an extinction coefficient close to 0, and the low refractive index materials are one or more oxides having a refractive index of 1.3 to 2 and an extinction coefficient close to 0.

[0015] According to another aspect of the invention, with regard to the multi-layer optical sheet, the materials with high refractive index are one of Ti3O5, TiO2, Ta2O5 and Nb2O5.

[0016] According to another aspect of the invention, with regard to the multi-layer optical sheet, the materials with a low refractive index are one of SiO2 and MgF2.

[0017] According to another aspect of the invention, with regard to the multi-layer optical sheet, each of the polygonal grid cells has a height of 0.3mm to 0.6mm and a width of 0.18mm to 0.48mm, and a distance between the center points of two horizontally adjacent polygonal grid cells is 0.38mm to 0.68mm, and a distance between the center points of two vertically adjacent polygonal grid cells is 0.33mm to 0.63mm.

[0018] According to another aspect of the invention, with regard to the multi-layer optical sheet, the height, width, distance between horizontally adjacent central points, and distances between vertically adjacent central points of the polygonal grid cells are reducible / enlargeable with an equal proportion for a product to which an application thereof is made.

[0019] According to another aspect of the invention, with regard to the process, a substrate material is one of glass, polycarbonate (PC), PMMA and a resin (CR39, MR7, MR8, MR174).

[0020] According to another aspect of the invention, with regard to the method, the photomask comprises a plurality of polygonal patterns.

[0021] According to another aspect of the invention, with regard to the method, the photomask comprises a plurality of polygonal patterns, individual hexagons of the plurality of polygons of the plurality of polygonal photomask plates being arranged alternately in elevation-recess such that a majority of the films of the plurality of multilayer films, each having a hexagonal shape after removal of the photosensitive resin, are not adjacent to each other but connected to the adjacent hexagonal multilayer film.

[0022] According to another aspect of the invention, with regard to the process, the two multilayer films are formed by alternately stacking a plurality of materials with a high refractive index and a plurality of materials with a low refractive index, the materials with a high refractive index comprising one or more oxides having a refractive index of 2 to 3 and an extinction coefficient close to 0, the materials with a low refractive index comprising one or more oxides having a refractive index of 1.3 to 2 and an extinction coefficient close to 0.

[0023] According to another aspect of the invention, with regard to the process, the materials with a high refractive index are one of Ti3O5, TiO2, Ta2O5 and Nb2O5.

[0024] According to another aspect of the invention, the materials with a low refractive index are one of SiO2 and MgF2.

[0025] According to another aspect of the invention, with regard to the process, the multilayer films have an anti-blue light property ranging from 10% to 50% and an anti-infrared property ranging from 30% to 70%.

[0026] According to another aspect of the invention, with regard to the method, each of the polygonal grid cells has a height of 0.3mm to 0.6mm and a width of 0.18mm to 0.48mm, and a distance between the central points of two horizontally adjacent polygonal grid cells 20 is 0.38mm to 0.68mm, and a distance between the central points of two vertically adjacent polygonal grid cells is 0.33mm to 0.63mm.

[0027] According to another aspect of the invention, with regard to the method, the height, the width, the distance between horizontally adjacent central points and the distances between vertically adjacent central points of the polygonal grid cells are reducible / enlargeable in equal proportions for a product to which an application of these is made. Brief description of the drawings

[0028] [Fig-1] Fig. 1 is a schematic view showing a structure of the present invention.

[0029] [Fig.2] Fig.2 is a schematic view showing a manufacturing process of the present invention.

[0030] [Fig.3] Fig.3 is a plot showing a comparison between a spectrum of transmission of anti-reflective light, anti-ultraviolet, violet and blue and anti-infrared light and a spectrum of an anti-reflective film according to the prior art.

[0031] [Fig.4] Fig.4 is a diagram illustrating the size of a plurality of cells of polygonal grids (grid cells of a honeycomb configuration) according to the present invention.

[0032] DETAILED DESCRIPTION OF PREFERRED EMBODIMENT MODES

[0033] By referring to [Fig.1], it appears that a multilayer optical sheet comprising a plurality of polygonal grid cells according to the present invention is presented, comprising a substrate 10, a plurality of polygonal grid cells 20, a multilayer film 30 and two antifouling and water-repellent layers 40.

[0034] The substrate 10 is made of a material which can be glass, polycarbonate (PC), poly(methyl methacrylate) (PMMA) or resin (CR39, MR7, MR8, MR174).

[0035] The cells of the plurality of polygonal grid cells 20 are formed on a surface of the substrate 10 by a vacuum application operation, and are formed by alternately stacking a plurality of materials with a high refractive index and a plurality of materials with a low refractive index, and are preferably of a hexagonal configuration, making the whole of it generally illustrating a honeycomb configuration (as shown in [Fig.4]). Each of the 20 polygonal grid cells has a height of 0.3mm to 0.6mm and a width of 0.18mm to 0.48mm, and a distance between the center points of two horizontally adjacent 20 polygonal grid cells is 0.38mm to 0.68mm, while a distance between the center points of two vertically adjacent 20 polygonal grid cells is 0.33mm to 0.63mm.For use in eyeglasses, the relevant proportions can be reduced in equal proportions, and for use on insulating paper or car windshield which must. To prevent horizontal glare when viewing a seascape, an enlargement can be made in equal proportions. High refractive index materials are one or more oxides, such as Ti3O5, TiO2, Ta2O5, and Nb2O5, with a refractive index of 2 to 3 and an extinction coefficient close to 0. Low refractive index materials are one or more oxides, such as SiO2 and MgF2, with a refractive index of 1.3 to 2 and an extinction coefficient close to 0. Thus, the cells of the plurality of polygonal grid cells 20 are capable of effectively resisting glare and blocking scattered light. The multilayer film 30 is formed on a surface of the substrate 10 opposite the plurality of polygonal grid cells 20 by a vacuum application operation and is formed by alternately stacking a plurality of high refractive index materials and a plurality of low refractive index materials.High refractive index materials are one or more oxides, such as Ti3O5, TiO2, Ta2O5 and Nb2O5, having a refractive index of 2 to 3 and an extinction coefficient close to 0. Low refractive index materials are one or more oxides, such as SiO2 and MgF2, having a refractive index of 1.3 to 2 and an extinction coefficient close to 0. As such, the 30 multilayer film is designed to resist reflected light, ultraviolet, violet and blue light, and infrared light.The two antifouling and water-repellent layers 40 are formed by a vacuum application operation to fix a water-repellent agent outside the plurality of polygonal grid cells 20 and the multilayer film 30, so that the cells of the plurality of polygonal grid cells 20 are enclosed by one of the antifouling and water-repellent layers 40 and the substrate 10, and the multilayer film 30 is sandwiched between the other of the antifouling and water-repellent layers 40 and the substrate 10.

[0036] With reference to [Fig.2], it appears that a method for manufacturing a multilayer optical sheet having a plurality of polygonal grid cells according to the present invention is illustrated, comprising the following steps: provide a substrate: a substrate material being glass, PC, PMMA or resin (CR39, MR7, MR8, MR174); Applying a photosensitive resin, or "photoresist": apply a photosensitive resin evenly to a surface of the substrate, and after the coating is complete, place the coated substrate in a curing oven to perform a gentle curing operation with a gentle curing setting. The photosensitive resin coating is applied using a rotary coating applicator or sprayer and can be applied with any equipment suitable for evenly coating the photosensitive resin onto the substrate, but without limitation, the photosensitive resin which can be selected as either a positive photosensitive resin or a negative photosensitive resin; expose: place the substrate on which the photosensitive resin is applied in an exposure apparatus to subject the photosensitive resin to exposure, according to an exposure process parameter, to a light source and with a photomask bearing a pattern, and place the substrate thus exposed in a curing oven to perform a curing and shaping operation with a curing parameter, the exposure apparatus being able to be an aligner, and any equipment which meets the requirements for pattern resolution and exposure conditions may be used, but without limitation;and the photomask comprises a plurality of polygonal patterns, the polygonal patterns preferably being hexagons, and individual hexagons of the plurality of polygons of the photomask plate are arranged in a raised-recessed pattern, so that, after stripping of the photosensitive resin, the films of the plurality of hexagonal multilayer films are not adjacent to each other, but are bonded to the adjacent hexagonal multilayer film; developing: operating a developing machine to remove from the substrate an exposed portion of the photosensitive resin that has undergone the curing and shaping operation with a developer, so as to form a layer of photosensitive resin having a pattern corresponding to the photomask; cleaning the substrate thus developed with deionized water to remove the remaining developer from the substrate and the layer of photosensitive resin; one operation among spraying, soaking, rinsing, and ultrasonic vibration, or a combination thereof, being applied as a developer removal measure, but without limitation; a layer of photosensitive resin with a pattern corresponding to the photomask being generated after the exposed portion of the photosensitive resin has been cleaned and removed by means of the developer, for example, for a negative photosensitive resin.an unexposed portion dissolving in the developer, while a portion irradiated by UV light does not dissolve in the photosensitive resin developer, and conversely, for a positive photosensitive resin, an exposed portion dissolving in the developer, while a portion irradiated by UV light does not dissolve in the photosensitive resin developer, the exposure conditions being adjustable at will; To perform a vacuum application: subject two surfaces of the substrate, which is formed with the photosensitive resin layer, to a vacuum application operation, in which a physical vapor deposition or a chemical vapor deposition is applied to deposit two multilayer films onto the substrate: one on the surface with the photosensitive resin layer and the other on the surface opposite the resin layer. photosensitive, respectively, and the two multilayer films are each formed by alternately stacking a plurality of high refractive index materials and a plurality of low refractive index materials, the high refractive index materials being one or more oxides, such as Ti3O5, TiO2, Ta2O5 and Nb2O5, having a refractive index of 2 to 3 and an extinction coefficient close to 0, and the low refractive index materials being one or more oxides, such as SiO2 and MgF2, having a refractive index of 1.3 to 2 and an extinction coefficient close to 0, and the blue light blocking property of the multilayer films being 10% to 50%, and the infrared blocking property being 30% to 70%; Stripping the photosensitive resin: Apply a photosensitive resin stripping agent (PH-strip) to strip and remove the photosensitive resin from the surface of the substrate bearing the pattern, and simultaneously remove the photosensitive resin layer, removing the multilayer film attached to one vertex of the photosensitive resin layer, while leaving the multilayer film attached to the substrate, which are the cells of the plurality of polygonal grid cells 20 (as shown in [Fig. 4]); each of the polygonal grid cells 20 has a height of 0.3 mm to 0.6 mm and a width of 0.18 mm to 0.48 mm, and a distance between the center points of two horizontally adjacent polygonal grid cells 20 is 0.38 mm to 0.68 mm, while a distance between the center points of two vertically adjacent polygonal grid cells 20 is 0.33 mm to 0.63 mm, and as such,The plurality of polygonal grid cells 20 allows for effective resistance to glare and blocking of scattered light, while allowing a greater light-gathering effect with uncoated areas, shortening the light and dark adaptation periods for the eyes. For use in eyeglasses, the relevant proportions can be reduced proportionally, and for use on insulating paper or car windshields that need to prevent horizontal glare when viewing the sea, enlargement can be made proportionally. The photoresist (or "PR" for protoresist) agent contains a combination of solvents, such as N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), and glycol ethers.but without this being exhaustive; and apply anti-fouling and water-repellent coatings: perform a vacuum application operation to fix a water-repellent agent to the outermost layers of the substrate.

[0037] The present invention provides a multilayer optical sheet comprising a plurality of polygonal grid cells, and a method for manufacturing it, which comprises a plurality of polygonal grid cells 20 to effectively resist glare, block scattered light and obtain a greater supplementary effect light in order to shorten the light adaptation periods for the eyes, and includes an arrangement of several layers of high refractive index materials and low refractive index materials for the multilayer film 30 in order to more effectively block ultraviolet, violet and blue light in the band from 280nm to 500nm and near infrared light in the band from 760nm to 2000nm, while maintaining high transmission performance for visible light.

[0038] Reference is made to [Fig.3], which presents a graph comparing the anti-light, anti-ultraviolet, anti-violet and anti-blue reflection, and anti-infrared transmission spectrum of an anti-reflective film with the spectrum of an anti-reflective film of the prior art.

Claims

1. Demands Method for manufacturing a multilayer optical sheet having a plurality of polygonal grid cells (20), characterized in that it comprises the following steps: providing a substrate (10); apply a photosensitive resin, or "photoresist": apply a photosensitive resin evenly to a surface of the substrate (10), then subject the coated substrate (10) to a gentle baking operation; expose: place the substrate (10) coated with the photosensitive resin in an exposure device to subject the photosensitive resin to exposure, according to an exposure process parameter, to a light source, and a photomask bearing a pattern, then place the substrate (10) in a baking oven to perform a hardening and shaping operation; develop: operate a developing machine to clean the photosensitive resin after exposure on the substrate (10) with a developer in order to generate a layer of photosensitive resin having a pattern effect corresponding to the photomask, wash the developed substrate (10) with deionized water to remove the remaining developer on the substrate (10) and the layer of photosensitive resin; to carry out a vacuum application: apply two multilayer films respectively on the surface of the substrate (10) having the photosensitive resin layer and the surface opposite the photosensitive resin layer, the multilayer films effectively blocking ultraviolet, violet and blue light in the wavelength band from 280nm to 500nm and near infrared light in the wavelength band from 760nm to 2000nm; stripping the photosensitive resin: apply a photosensitive resin stripping agent to strip and remove the photosensitive resin from the surface of the substrate (10) bearing the pattern, and, at the same time as the photosensitive resin layer is removed, remove the multilayer film (30) attached to a vertex of the photosensitive resin layer, while leaving the multilayer film (30) attached to the substrate (10) to form a plurality of grid cells (20) polygonal, the cells of the plurality of grid cells (20) polygonal blocking the scattered light; and the application of antifouling and water-repellent layers: application of a vacuum coating to fix a water-repellent agent to the outermost layers of the substrate (10).

2. Method of manufacturing a multilayer optical sheet having a plurality of polygonal grid cells (20) according to claim 1, characterized in that a substrate material (10) is one of glass, polycarbonate (PC), PMMA and a resin (CR39, MR7, MR8, MR174).

3. Method of manufacturing a multilayer optical sheet comprising a plurality of polygonal grid cells (20) according to claim 1, characterized in that the photomask comprises a plurality of polygonal patterns.

4. A method for manufacturing a multilayer optical sheet having a plurality of polygonal grid cells (20) according to claim 3, characterized in that the photomask comprises a plurality of polygonal patterns, individual hexagons of the plurality of polygons of the plurality of polygonal photomask plates being arranged alternately in elevation-recess such that a majority of the films of the plurality of multilayer films, each having a hexagonal shape after removal of the photosensitive resin, are not adjacent to each other but connected to the adjacent hexagonal multilayer film (30).

5. A method for manufacturing a multilayer optical sheet having a plurality of polygonal grid cells (20) according to claim 1, characterized in that the two multilayer films are formed by alternately stacking a plurality of high refractive index materials and a plurality of low refractive index materials, the high refractive index materials comprising one or more oxides having a refractive index of 2 to 3 and an extinction coefficient close to 0, the low refractive index materials comprising one or more oxides having a refractive index of 1.3 to 2 and an extinction coefficient close to 0.

6. Method of manufacturing a multilayer optical sheet having a plurality of polygonal grid cells (20) according to claim 5, characterized in that the materials with high refractive index are one of Ti3O5, TiO2, Ta2O5 and Nb2O5.

7. Method of manufacturing a multilayer optical sheet comprising a plurality of polygonal grid cells (20) according to claim 5, characterized in that the low refractive index materials are one of SiO2 and MgF2.

8. Method of manufacturing a multilayer optical sheet comprising a plurality of polygonal grid cells (20) according to claim 5, characterized in that the multilayer films have an anti-blue light property ranging from 10% to 50% and an anti-infrared property ranging from 30% to 70%.

9. A method for manufacturing a multilayer optical sheet comprising a plurality of polygonal grid cells (20) according to claim 1, characterized in that each of the polygonal grid cells (20) has a height of 0.3mm to 0.6mm and a width of 0.18mm to 0.48mm, and a distance between the center points of two horizontally adjacent polygonal grid cells 20 is 0.38mm to 0.68mm, and a distance between the center points of two vertically adjacent polygonal grid cells is 0.33mm to 0.63mm.

10. A method for manufacturing a multilayer optical sheet comprising a plurality of polygonal grid cells according to claim 9, characterized in that the height, width, distance between horizontally adjacent center points and distances between vertically adjacent center points of the polygonal grid cells are reducible / enlargeable in equal proportions for a product to which an application of these is made.

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