Myopic control patch based on microlens array, preparation method, lens and glasses

Abstract

The application relates to a myopia prevention and control patch based on a microlens array, a preparation method, a lens and glasses, and belongs to the technical field of optical components, which comprises a flexible substrate and a structure layer arranged on the flexible substrate; the structure layer is provided with a myopia prevention and control area, the myopia prevention and control area is composed of a microlens array, the microlens array is composed of a plurality of microlenses, the curvature of the microlenses is greater than that of the front surface of the substrate, and the plurality of microlenses are arranged at intervals to expand in a two-dimensional direction. The myopia prevention and control patch in the application can be independently processed, the processing efficiency can be improved, the lens loss can be reduced, and the processing cost can be reduced.

Description

Technical Field

[0001] This application belongs to the field of optical components, and specifically relates to a myopia control patch based on a microlens array, its preparation method, lenses, and eyeglasses. Background Technology

[0002] One of the factors that promotes myopia is central hyperopia of the retina due to accommodative lag (lack of accommodation, skipping the accommodation required to focus on nearby objects) when looking at near objects. In other words, because the focal point of the central part of the retina is behind the retina, the axial length of the eye elongates to match it, causing the eye to lengthen in the front-to-back direction, leading to the development of myopia.

[0003] Therefore, by providing the ability to assist with accommodation in myopia and preventing the image from focusing behind the retina, the progression of myopia can be prevented. One view holds that, in order to inhibit the development of myopia, the image state of not only the central portion of the retina but also the peripheral portion is important. This is because the peripheral portion of the retina also elongates the axial length due to blurred vision caused by hyperopia, which is a factor contributing to peripheral myopia.

[0004] Patent document CN114114711A discloses a spectacle lens for suppressing the progression of myopia. It has a first region and a second region. The first region is located at the top of the lens and is used for viewing distant objects. The second region is located below the first region and has a more positive refractive power than the first region. A myopia suppression region is arranged around the first and second regions. By using the myopia suppression region, the focal point of the peripheral retina is positioned in front of the retina, thus preventing the wearer's myopia from worsening.

[0005] The myopia progression suppression area includes a convex lens group composed of many convex lenses. The convex lenses are processed directly on the lens. This method has the problem of being relatively complicated, and the myopia degree needs to be confirmed before the lens is sent to the factory for processing, which is very time-consuming. Summary of the Invention

[0006] This application provides a myopia control patch based on a microlens array, a method for its preparation, a lens, and eyeglasses, to at least solve the above-mentioned technical problems existing in the prior art.

[0007] One embodiment of this application provides a myopia control patch based on a microlens array. The myopia control patch is applied to a myopia control lens. The myopia control patch includes a flexible substrate and a structural layer disposed on the flexible substrate. The structural layer has a myopia control region, which is composed of a microlens array. The microlens array is composed of a plurality of microlenses, and the curvature of the microlenses is greater than the curvature of the front surface of the substrate. The plurality of microlenses are arranged at intervals to extend in a two-dimensional direction.

[0008] In one embodiment, the microlens array covers the myopia prevention and control area in a hexagonal close-packed manner.

[0009] In one embodiment, the flexible substrate is made of one of PDMS, PE, PI, and PMMA; the microlens is made of one of silicon, germanium and its compounds, gallium nitride, titanium oxide, and chalcogenide materials.

[0010] In one embodiment, the focal length of the microlenses in the microlens array near the center of the patch is greater than the focal length of the microlenses near the outer periphery of the patch; the microlens array is arranged in a ring shape and at an angle to counteract the astigmatism of the microlenses.

[0011] In one embodiment, the distribution density of microlenses in the microlens array is sparse at the top and dense at the bottom.

[0012] In one embodiment, the distribution density of microlenses disposed near the center of the patch is lower than that near the outer periphery of the patch.

[0013] Another aspect of this application provides a method for preparing a myopia control patch, comprising the following preparation steps: S1. A cylindrical structure array is photolithographically patterned on a substrate, with photoresist as the main component; S2. Heat and reflux to melt the cylinder into the shape of a microlens; S3. Microlens templates are made using a metal electroplating process; S4. The lens body material is transferred through injection molding demolding to obtain the myopia control patch.

[0014] In one embodiment, the lens body material is one of PDMS, PE, PI, and PMMA.

[0015] Another embodiment of this application provides a myopia control lens, which is composed of any of the above-mentioned myopia control patches and the optical lens, wherein the myopia control patch is bonded to the optical lens.

[0016] Another embodiment of this application provides a myopia control glasses, including the aforementioned myopia control lenses and frames.

[0017] Compared with the prior art, this application has the following advantages: 1. In the prior art, the myopia progression suppression area in myopia control lenses is processed directly on the optical lens. However, in this application, the microlens array is made into a patch, which enables the myopia control patch to be processed independently, thereby improving processing efficiency, reducing lens wear, and thus reducing processing costs. 2. Since the myopia control patch and optical lens of the myopia control lens in this application can be freely combined, it can reduce costs and increase the degree of freedom; 3. The myopia control patch prepared by the method described in this application has good imaging quality and can image peripheral objects in front of the retina, thereby alleviating myopia. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the myopia control patch in the embodiments of this application; Figure 2 This is a schematic diagram showing the hexagonal arrangement of microlenses in the microlens array in an embodiment of this application; Figure 3 This is a schematic diagram showing the island-shaped arrangement of microlenses in the microlens array in an embodiment of this application; Figure 4 This is a schematic diagram showing that the distribution density of microlenses in the microlens array in this application is sparse at the top and dense at the bottom; Explanation of reference numerals in the attached figures: 1. Flexible substrate; 2. Structural layer; 21. Myopia control area; 211. Microlens array; 22. First region; 23. Second region. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings.

[0020] Reference Figure 1 This application discloses a myopia control patch based on a microlens array, which is applied to a myopia control lens. The myopia control lens is composed of the myopia control patch and an optical lens, and the myopia control patch is bonded to the optical lens.

[0021] When fitting myopia glasses, after determining the degree of myopia and selecting the corresponding optical lenses, the myopia control patch can be directly attached to the optical lenses without having to send the optical lenses for processing. This greatly reduces the time required to fit the myopia control lenses, and processing the myopia control patch separately can reduce the wear and tear on the optical lenses and lower processing costs.

[0022] Since the myopia control patch is directly attached to the optical lens, it is flexible. Therefore, the myopia control patch includes a flexible substrate 1 and a structural layer 2 disposed on the flexible substrate 1. The structural layer 2 has a myopia control region 21. The myopia control region 21 is composed of a microlens array 211, which consists of a plurality of microlenses. The curvature of the microlenses is greater than the curvature of the front surface of the substrate, and the plurality of microlenses are arranged at intervals to extend in a two-dimensional direction.

[0023] The flexible substrate 1 is made of materials including, but not limited to, PDMS, PE, PI, and PMMA. The microlenses are made of materials including, but not limited to, silicon, germanium and its compounds, gallium nitride, titanium oxide, and chalcogenide materials.

[0024] The arrangement of the microlens array 211 can be set according to actual needs.

[0025] For example, refer to Figure 2 The microlens array 211 can be arranged in a hexagonal pattern, that is, in a hexagonal stacking manner, with the microlenses located at the vertices of the hexagons.

[0026] For example, the focal length of the microlenses in the microlens array 211 near the center of the patch is greater than the focal length of the microlenses near the outer periphery of the patch.

[0027] For example, refer to Figure 3 The microlens array 211 is arranged in a ring shape and at an angle to counteract the astigmatism of the microlenses.

[0028] The distribution density of microlenses in the microlens array 211 can be changed according to different needs.

[0029] For example, refer to Figure 4 In the microlens array 211, the distribution density of microlenses is sparse at the top and dense at the bottom. Alternatively, the distribution density of microlenses in a microlens array can also be dense at the top and sparse at the bottom.

[0030] For example, the distribution density of microlenses located near the center of the patch is lower than that near the outer periphery of the patch.

[0031] Reference Figure 3 The structural layer 2 also includes a first region 22 and a second region 23. The first region 22 is used for viewing at a distance and is located on the upper side of the myopia control patch. The second region 23 is located on the lower side of the first region 22, and the refractive power of the second region 23 is greater than that of the first region 22. The myopia control area 21 is arranged around the periphery of the first region 22 and the second region 23.

[0032] The preparation method of any of the above-mentioned myopia control patches is as follows: S1. A cylindrical structure array is photolithographically patterned on a substrate, with photoresist as the main component; S2. Heat and reflow the photoresist to the glass transition temperature, so that the cylinder melts into the shape of a microlens. S3. Microlens templates are made using a metal electroplating process; S4. The lens body material is transferred through injection molding demolding to obtain the myopia control patch.

[0033] The lens body materials mentioned above include, but are not limited to, PDMS, PE, PI and PMMA.

[0034] This application provides a myopia control lens, which is composed of any of the above-mentioned myopia control patches and the optical lens, wherein the myopia control patch is bonded to the optical lens.

[0035] This application also discloses a myopia control glasses, which includes any of the myopia control lenses and frames described above.

[0036] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method for preparing a myopia control patch based on a microlens array, characterized in that, The myopia control patch is applied to a lens, and the myopia control patch includes a flexible substrate and a structural layer disposed on the flexible substrate; The structural layer is provided with a myopia prevention and control area, which is composed of a microlens array. The microlens array is composed of several microlenses, and the curvature of the microlenses is greater than the curvature of the front surface of the substrate. The several microlenses are arranged at intervals to extend in a two-dimensional direction. The myopia prevention patch includes the following preparation steps: S1. A cylindrical structure array is photolithographically patterned on a substrate, with photoresist as the main component; S2. Heat and reflux to melt the cylinder into the shape of a microlens; S3. Microlens templates are made using a metal electroplating process; S4. The lens body material is transferred through injection molding demolding to obtain the myopia control patch.

2. The method for preparing a myopia control patch according to claim 1, characterized in that: The lens body material is one of PDMS, PE, PI and PMMA.

3. A myopia control lens, characterized in that: Includes a myopia control patch made by the preparation method of claim 1, said myopia control patch being adhered to an optical lens.

4. A type of myopia control glasses, characterized in that: Includes the myopia control lenses and frames as described in claim 3.

Images