Microstructure out-of-focus lens capable of reducing phase mutation around microstructure

Abstract

The utility model discloses a microstructure out-of-focus lens capable of reducing phase mutation at the periphery of a microstructure, which comprises a substrate and a functional area adsorbed on the substrate, the functional area comprises a central area and an out-of-focus functional area, the out-of-focus functional area surrounds the central area, the out-of-focus functional area comprises a plurality of microstructures, and the microstructures are arranged in the central area. The periphery of each microstructure is surrounded by a phase mutation reduction area, the phase mutation reduction areas cover the peripheries of the microstructures and local areas of the microstructures, the phase mutation reduction areas are arranged outwards in the radial direction by taking the centers of the microstructures as original points, the initial positions are not lower than 0.2 times of the diameters of the microstructures, and the final positions are not higher than 3 times of the diameters of the microstructures; and structures for preventing direct transmission of light rays are distributed in the phase mutation reduction area. According to the microstructure out-of-focus lens capable of reducing the peripheral phase mutation of the microstructure, provided by the utility model, the fundus high-frontal spherical power and cylindrical power caused by the peripheral phase mutation of the microstructure can be reduced, the comfort of a wearer is improved, and the myopia management efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a defocus lens, and more particularly to a microstructure defocus lens that can reduce phase abrupt changes around the microstructure. Background Technology

[0002] Microstructured lenses (such as lenses and cylinders) are currently the mainstream type of defocused eyeglasses. For example, patent "Eyeglass Lens" (2013106281748) discloses an eyeglass lens for correcting peripheral hyperopic defocus of the retina. This lens consists of a first refractive region located in the center and a second refractive region located in the periphery. The first refractive region is a uniform and smooth refractive surface, and the second refractive region is a 360° annular refractive surface composed of multiple independent island-shaped microlenses. These microstructured lenses are all made by molds. When making the mold, the microstructure needs to be engraved on the base surface. It is difficult to make the edges of the microstructure and the edges of the base surface smooth, and there is a difference in refractive power between them and the base film. This difference will cause a phase abrupt change. When light passes through this position, it will cause a large phase change, which in turn will cause a large change in refractive power (including spherical power and cylinder power). When lenses are made using this type of mold, phase abrupt changes around the microstructure are superimposed on the lens. Although hardening coatings can smooth out some of these geometric abrupt changes, the phase abrupt changes around the microstructure do not decrease but rather increase because the refractive indices of the hardening fluid and coating materials differ from those of the lens material itself. When light passes through the microstructure periphery of the lens, a large optical path difference is added, causing phase abrupt changes and resulting in high spherical and cylindrical powers in the fundus, thus affecting myopia management efficiency. How to reduce phase abrupt changes around the microstructure is a problem that urgently needs to be solved for current microstructure defocused lenses. Solving this problem can further improve the efficiency of myopia management. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to propose a microstructure defocus lens that can reduce phase abrupt changes in the periphery of the microstructure, so as to solve the problem of phase abrupt changes in the periphery of the microstructure and the problem of high spherical and cylindrical power in the fundus caused by such phase abrupt changes, thereby providing a more effective myopia management lens.

[0004] Technical solution: This utility model includes a substrate and a functional area adsorbed on the substrate. The functional area includes a central area and a defocusing functional area. The defocusing functional area surrounds the central area and includes several microstructures. Each microstructure is surrounded by a phase change reduction area, which covers the periphery of the microstructure and a local area of ​​the microstructure.

[0005] The phase abrupt change reduction region is arranged radially outward from the center of the microstructure, with the starting position not less than 0.2 times the diameter of the microstructure and the ending position not more than 3 times the diameter of the microstructure.

[0006] The phase abrupt change reduction region has a structure that obstructs the direct transmission of light, and its light transmission ratio does not exceed 80%.

[0007] The microstructure provides defocus signal stimulation to the fundus, and the phase abrupt change reduction region is used to reduce the phase of abrupt changes around the microstructure.

[0008] The diameter of the microstructure is not less than 0.5 mm, the size of the microstructure is not less than one type, the defocusing amount of different microstructures is different, the distribution of microstructures in a single ring is not limited to one type, and there are gaps between adjacent microstructures.

[0009] The additional defocus range of the microstructure 301 is -6D to 6D.

[0010] The number of rings in the defocus functional area shall not be less than 6, and the diameter of the central area shall not be less than 5mm.

[0011] The substrate provides the refractive power required to correct visual acuity.

[0012] The refractive power range of the substrate for correcting visual acuity is -10D to 10D, and for astigmatism, it is -5D to 5D.

[0013] Beneficial effects: This invention can solve the problem of phase abrupt changes in the periphery of microstructures and the problem of high spherical and cylindrical power in the fundus caused by such phase abrupt changes, thereby providing more effective myopia management lenses; reducing high spherical and cylindrical power and increasing wearer comfort. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the lens structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the phase abrupt change region around the microstructure;

[0016] Figure 3 This is a feasible type of phase abrupt change reduction region in the lens of this utility model. Figure 3 In the middle (a), the scattering structure is a point-like structure. Figure 3 (b) is a linear structure. Figure 3 (c) represents the opaque area stained with dye. Figure 3 The middle (d) is a wave structure. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Example 1

[0019] like Figure 1As shown, the present invention discloses a microstructure defocusing lens capable of reducing phase abrupt changes in the periphery of microstructures, comprising a substrate 1 and functional areas adsorbed on the substrate 1. The functional areas include a central area 2 and a defocusing functional area 3, with the defocusing functional area 3 surrounding the central area 2. The defocusing functional area 3 includes several microstructures 301, each surrounded by a phase abrupt change reduction area 302. The phase abrupt change reduction area 302 covers the periphery of the microstructure 301 and a local area of ​​the microstructure 301. The substrate 1 provides the refractive power required for visual correction, the microstructures 301 provide defocus signal stimulation to the fundus, and the phase abrupt change reduction area 302 is used to reduce phase abrupt changes in the periphery of the microstructures.

[0020] The phase abrupt change reduction region 302 is arranged radially outward from the center of the microstructure 301, with the starting position not less than 0.2 times the diameter of the microstructure and the ending position not more than 3 times the diameter of the microstructure 301.

[0021] The distribution of the phase abrupt change reduction region 302 is not limited to scatterers, opaque pigments, engraved meshes, engraved lines, or other structures that obstruct the direct transmission of light, and its light transmission ratio does not exceed 80%.

[0022] The refractive power range of the corrected visual acuity of the substrate 1 is -10D to 10D, and the astigmatism is -5D to 5D. The types of substrate 1 are not limited to spherical lenses, single aspherical lenses, double aspherical lenses, freeform lenses, etc.

[0023] The defocus functional area 3 has no fewer than 6 rings, the central area 2 has a diameter of no less than 5 mm, and microstructures 301 are distributed within the rings. The diameter of each microstructure 301 is no less than 0.5 mm, and the size of each microstructure 301 is no less than one type. Different microstructures 301 have different defocus amounts. The distribution of microstructures 301 within a single ring is not limited to one type. There are gaps between adjacent microstructures 301, and they are not tightly connected. The spacing between adjacent microstructures 301 is not limited to equal or non-equal spacing. The additional defocus amount of the microstructures 301 ranges from -6D to 6D, and the types of microstructures 301 are not limited to microlenses, cylindrical lenses, Gaussian structures, etc.

[0024] Example 2

[0025] like Figure 1 This embodiment of a microstructure defocusing lens that reduces phase abrupt changes around a microstructure includes a substrate 1 and functional areas attached to the substrate. The functional areas include a central area 2 and a defocusing functional area 3. The defocusing functional area 3 includes a microstructure 301 and a phase abrupt change reduction area 302 surrounding the microstructure. The phase abrupt change reduction area 302 is arranged radially outward from the center of the microstructure 301, with its starting position at 0.8 times the diameter of the microstructure and its ending position at 1.3 times the diameter of the microstructure 301. The phase abrupt change reduction area 302 employs... Figure 3The scattering structure in (a) is used to block direct light transmission. The refractive power of substrate 1 is -2D for visual acuity and -1D for astigmatism. Substrate 1 uses a double aspherical lens. The defocusing functional area 2 has 9 rings, with a central diameter of 6mm. Microstructures 301, each 1mm in diameter, are distributed within the rings. The additional defocusing amount of microstructures 301 decreases from +3.5D outwards to 2.6D. Adjacent microstructures 301 must have gaps and be evenly spaced at 0.3mm intervals. Microstructures 301 are microlenses. Figure 2 This is a schematic diagram of a phase change in a single microstructure, indicating that the location of the phase change region is at the periphery of the microlens edge. Figure 3 Four results for the phase abrupt decrease region are given. Figure 3 In the middle (a), the scattering structure is a point-like structure. Figure 3 (b) is a linear structure. Figure 3 (c) represents the opaque area stained with dye. Figure 3 The middle (d) is a wave structure.

[0026] The microstructure defocus lens proposed in this invention can reduce peripheral phase abrupt changes in the microstructure, thereby reducing the high spherical and cylindrical power of the fundus caused by peripheral phase abrupt changes in the microstructure, increasing the wearer's comfort, and improving the efficiency of myopia management.

Claims

1. A microstructure defocusing lens capable of reducing phase abrupt changes around the microstructure, characterized in that, It includes a substrate and functional regions adsorbed on the substrate. The functional regions include a central region and a defocused functional region. The defocused functional region surrounds the central region and includes several microstructures. Each microstructure is surrounded by a phase transition reduction region, which covers the periphery of the microstructure and the local area of ​​the microstructure.

2. The microstructure defocusing lens according to claim 1, which can reduce phase abrupt changes around the microstructure, is characterized in that, The phase abrupt change reduction region is arranged radially outward from the center of the microstructure, with the starting position not less than 0.2 times the diameter of the microstructure and the ending position not more than 3 times the diameter of the microstructure.

3. The microstructure defocusing lens according to claim 2, which can reduce phase abrupt changes around the microstructure, is characterized in that, The phase abrupt change reduction region has a structure that obstructs the direct transmission of light, and its light transmission ratio does not exceed 80%.

4. The microstructure defocusing lens according to claim 1, which can reduce phase abrupt changes around the microstructure, is characterized in that, The microstructure provides defocus signal stimulation to the fundus, and the phase abrupt change reduction region is used to reduce the phase of abrupt changes around the microstructure.

5. The microstructure defocusing lens according to claim 1 or 4, characterized in that, The diameter of the microstructure is not less than 0.5 mm, the size of the microstructure is not less than one type, the defocusing amount of different microstructures is different, the distribution of microstructures in a single ring is not limited to one type, and there are gaps between adjacent microstructures.

6. The microstructure defocusing lens according to claim 5, which can reduce phase abrupt changes around the microstructure, is characterized in that, The additional defocus range of the microstructure is -6D to 6D.

7. The microstructure defocusing lens according to claim 1, which can reduce phase abrupt changes around the microstructure, is characterized in that, The number of rings in the defocus functional area shall not be less than 6, and the diameter of the central area shall not be less than 5mm.

8. The microstructure defocusing lens according to claim 1, which can reduce phase abrupt changes around the microstructure, is characterized in that, The substrate provides the refractive power required for visual correction, with the refractive power range for visual correction being -10D to 10D and for astigmatism -5D to 5D.

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