A lens with annular cylindrical microstructures arranged radially and alternately on the surface

Abstract

The present invention proposes a lens having annular cylindrical microstructures arranged radially and alternately on its surface. The lens comprises a lens body, the surface of which is provided with concentric circular structures. The lens body area occupied by the concentric circular structures constitutes the annular microstructure distribution zone, and the central circular area of ​​the lens body forms the central optical zone, which is located inward of the annular microstructure distribution zone. The concentric circular structures contain a plurality of annular cylindrical microstructures A and B, which have different axial directions. The annular cylindrical microstructures A and B are arranged in an alternating pattern from the inside to the outside of the lens body radially, generating high-order phase aberrations. The area of ​​the annular microstructure distribution zone after excluding the annular cylindrical microstructures A and B constitutes a transition zone. The alternating arrangement of the annular cylindrical microstructures with two axial designs creates irregular astigmatism, which generates high-order perturbations on the incident wavefront of the human eye, achieving a better myopia intervention effect.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of design and processing of optical lenses, and in particular to a lens with annular cylindrical microstructures arranged radially and alternately on the surface. Background Art

[0002] There are many methods for preventing and controlling myopia, including glasses, functional glasses, and orthokeratology lenses, which have all been proven to be effective in slowing the progression of myopia. Functional glasses, through specially designed lenses, can convert hyperopic defocus in the peripheral retina into myopic defocus, thereby providing special visual stimulation to the brain and slowing the progression of myopia. Clinical studies have found that this hyperopic defocus in the peripheral retina is one of the key factors that promote the development of myopia. Previous studies have reported that designs that add microlens arrays to the peripheral area of ​​the lens can convert hyperopic defocus in the peripheral retina into myopic defocus through the interference of the refractive power of the microlenses, effectively slowing the progression of myopia. Another type of spectacle lens, by adding cylindrical microstructures to the peripheral area of ​​the lens, can introduce higher-order aberrations and myopic defocus along the radial meridian in the peripheral field of view of the retina. This introduces opposite higher-order aberrations to the human eye's refractive system in the peripheral defocus area of ​​the retina, has little effect on the refractive power of the entire eye caused by low-order aberrations, but can cause visual disturbances to the peripheral defocus of the retina, forming new peripheral defocus, which can also effectively slow the progression of myopia.

[0003] The human eye's refractive state is not simply spherical; the vast majority of people have some astigmatism. Therefore, the technical field is focusing on how to combine peripheral defocus theory with the visually disturbing effects of higher-order aberrations to achieve better myopia intervention results. Currently, this design approach has not been applied in lens design, nor has the manufacturing process been established. Summary of the Invention

[0004] The purpose of the present invention is to address the above problems and propose a lens with annular cylindrical microstructures arranged radially and alternately on the surface, which adopts a targeted and reasonable structural design and has a better myopia suppression effect.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A lens having annular cylindrical microstructures arranged radially and alternately on its surface, comprising a lens body, wherein the surface of the lens body is provided with concentric circular structures, wherein the area of ​​the lens body occupied by the concentric circular structures is the annular microstructure distribution area, and the concentric circular structures can be distributed on the front surface or the back surface of the lens body, or extend to both the front and back surfaces of the lens.

[0007] A circular area with a radius of R1 and the center of the lens body as the center forms a central optical area, and the central optical area is located on the inner side of the annular microstructure distribution area; the concentric circle structure includes a number of annular cylindrical microstructures A and annular cylindrical microstructures B, and the annular cylindrical microstructures A and the annular cylindrical microstructures B are raised or recessed on the surface of the lens body and are continuous annular structures. The annular cylindrical microstructures A and the annular cylindrical microstructures B have different axial directions, and the annular cylindrical microstructures A and the annular cylindrical microstructures B are staggered and arranged from the inside to the outside along the radial direction of the lens body to produce high-order phase difference. The area after the annular cylindrical microstructures A and the annular cylindrical microstructures B are excluded from the annular microstructure distribution area is the transition zone.

[0008] Preferably, the concentric circle structure has the geometric center of the lens body as the center, the outermost edge radius of the concentric circle structure is R2, and the annular area between R1 and R2 is defined as the annular microstructure distribution area.

[0009] Preferably, the lens is designed to have a peripheral optical zone or no peripheral optical zone according to the coverage of the annular microstructure distribution area on the lens body: when the outer edge of the annular microstructure distribution area does not cover the edge of the lens body, the area of ​​the lens body outside the annular microstructure distribution area forms the peripheral optical zone; when the outer edge of the annular microstructure distribution area coincides with the edge of the lens body, there is no peripheral optical zone.

[0010] Preferably, the annular cylindrical microstructure A and the annular cylindrical microstructure B both have a base and a microstructure, the base is integrated with the lens body, and the microstructure is an annular cylindrical structure protruding outward from the surface of the lens body; one of the annular cylindrical microstructure A and the annular cylindrical microstructure B is a local regular astigmatism degree, the axial direction of the local regular astigmatism degree is the radial meridian direction of the lens body, and the axial directions of the annular cylindrical microstructure A and the annular cylindrical microstructure B are perpendicular to each other, and irregular astigmatism is formed by the axially perpendicular staggered distribution of the annular cylindrical microstructure A and the annular cylindrical microstructure B, and the irregular astigmatism produces high-order disturbances on the incident wavefront of the human eye.

[0011] Preferably, the peripheral optical zone has the same refractive power as the central optical zone.

[0012] Preferably, the transition zone has the same refractive power as the central optical zone.

[0013] Preferably, the annular microstructure distribution area can generate the same spherical refractive power as the central optical area within the effective working area defined by the pupil size.

[0014] Preferably, the high-order aberrations provided by each layer of the annular cylindrical microstructure A and the annular cylindrical microstructure B in the concentric circle structure are not completely the same.

[0015] Preferably, each layer of the annular cylindrical microstructure A and the annular cylindrical microstructure B in the concentric circle structure provides the same high-order aberrations.

[0016] Preferably, the radial widths of each annular cylindrical microstructure A and annular cylindrical microstructure B in the concentric circle structure are not completely the same, and the spacing distances between each layer of annular cylindrical microstructure A and annular cylindrical microstructure B are not completely the same.

[0017] Compared with the prior art, the lens of the present invention having annular cylindrical microstructures arranged radially and alternately on the surface has the following beneficial effects:

[0018] The surface of the present invention has an annular cylindrical microstructure with radially alternating arrangement of the eyeglass lens, which combines the peripheral defocus theory and the visual disturbance effect of high-order aberrations in a diversified way. After wearing the lens correctly, the convergence of the outgoing light rays of the external parallel light rays in the area outside the annular microstructure distribution area changes to a refractive power that conforms to the prescription degree, and has an excellent and stable visual correction effect. The external parallel light rays passing through the annular cylindrical microstructure distribution area can introduce spherical radial defocus and high-order aberrations to the eye wearing the lens, which includes a variety of aberration effects, and realizes the coexistence of regular astigmatism and irregular astigmatism in the peripheral field of view in terms of visual effect, more fully reflects the low-order and high-order disturbances of the incident wavefront in the peripheral field of view of the human eye, and forms a more sufficient new peripheral defocus state. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an embodiment of a lens having annular cylindrical microstructures arranged radially and alternately on its surface according to the present invention.

[0020] Figure 2 Schematic cross-sectional view of the lens body in this embodiment.

[0021] Figure 3 Schematic diagram of the structure of the annular microstructure distribution area in this embodiment.

[0022] Figure 4 Schematic diagram of the cross section of the annular microstructure distribution area in this embodiment.

[0023] Figure 5 This is an enlarged plan view of the possible lens structure when observing foreign objects through the annular microstructure distribution area in this embodiment with a 4mm pupil.

[0024] Figure numerals: 1. lens body; 2. central optical zone; 3. annular microstructure distribution area; 30. annular cylindrical microstructure A; 31. annular cylindrical microstructure B; 32. transition zone; 4. peripheral optical zone. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Embodiment: The present invention will be clearly illustrated below with drawings and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0027] The terms used herein are for describing specific embodiments only and are not intended to be limiting of the present invention. Singular forms such as "a," "the," "this," "this," and "the" as used herein also include plural forms.

[0028] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct or indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0029] The terms “include,” “including,” and “have” used in this document are open-ended terms, meaning including but not limited to.

[0030] Unless otherwise noted, the terms used herein generally have their ordinary meanings in the art, in the context of the present invention, and in the specific context. Certain terms used to describe the present invention are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present invention.

[0031] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0032] like Figures 1 to 4 The lens shown has a surface with annular cylindrical microstructures arranged radially alternately, including a lens body 1, and a concentric circle structure is provided on the surface of the lens body 1. The area of ​​the lens body 1 occupied by the concentric circle structure is the annular microstructure distribution area 3, and the concentric circle structure can be distributed on the front surface of the lens body 1 (i.e., the convex surface).

[0033] A circular area with a radius of R1, centered at the center of the lens body 1, forms the central optical zone 2. The specified radius R1 can be 5mm to 10mm. The central optical zone 2 is located inside the annular microstructure distribution area 3. The central optical zone 2 is one of the main working areas of the lens, providing excellent image quality and a stable vision correction effect. The annular microstructure distribution area 3 is located outside the central optical zone 2. The outermost edge radius of the concentric circular structure is R2. The specified radius R2 can be 20mm or greater. That is, the annular area between R1 and R2 is defined as the annular microstructure distribution area 3, which is another main working area of ​​the lens. Depending on the coverage of the annular microstructure distribution area 3 on the lens body 1, the lens body 1 is designed to have a peripheral optical zone 4 or not. When the outer edge of the annular microstructure distribution area 3 does not cover the edge of the lens body 1, the lens body 1 forms the peripheral optical zone 4 in the area outside the annular microstructure distribution area 3. When the outer edge of the annular microstructure distribution area 3 coincides with the edge of the lens body 1, there is no peripheral optical zone 4. The peripheral optical zone 4 is an optional zone, and its presence is determined according to design requirements. When the peripheral optical zone 4 exists, it has the same physical properties as the central optical zone 2 .

[0034] The concentric circular structure includes multiple annular cylindrical microstructures A30 and multiple annular cylindrical microstructures B31. The annular cylindrical microstructures A30 and B31 are continuous annular structures that are raised or recessed on the surface of the lens body 1. The annular cylindrical microstructures A30 and B31 are arranged in an interlaced manner from the inside to the outside along the radial direction of the lens body 1. The area after the annular cylindrical microstructures A30 and B31 are removed from the annular microstructure distribution area 3 is the transition area 32. The annular cylindrical microstructures A30 and B31 each have a base and a microstructure. The base is integrated with the lens body 1, and the microstructure is an annular cylindrical structure that protrudes outward from the surface of the lens body 1. The annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 have different axial directions, and one of the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 has a local regular astigmatism degree, and the axial direction of the local regular astigmatism degree is the radial meridian direction of the lens body 1, and the axial directions of the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 are perpendicular to each other. Specifically, the annular cylindrical microstructure A30 is a horizontal axial direction, and the annular cylindrical microstructure B31 is a vertical axial direction. Irregular astigmatism is formed by the axially vertically staggered distribution of the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31, and the irregular astigmatism produces high-order disturbances on the incident wavefront of the human eye.

[0035] The annular cylindrical microstructures A30 and B31 are arranged in an interlaced manner from the inside to the outside of the lens body 1 in a radial direction, generating high-order phase aberration. The radial widths of the annular cylindrical microstructures A30 and B31 can be 0.5 mm to 2 mm, and the radial widths of the annular cylindrical microstructures A30 and B31 at different locations can be the same or different. In addition, the spacing between adjacent annular cylindrical microstructures A30 and B31 can be equal or unequal, and the spacing d can be 0.5 mm to 3 mm.

[0036] The cross-sectional surface shape of the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 can be arc-shaped or in other shapes, but it must be ensured that the refractive power of the lens at full aperture meets the prescription degree, and at the same time, the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 meet the high-order aberrations specified during the design. The selected high-order aberrations can be rotationally symmetric aberrations, such as equal high-order spherical aberrations. The same annular cylindrical microstructure A30 or annular cylindrical microstructure B31 can be a single high-order spherical aberration design, or a design that superimposes several high-order spherical aberrations. The myopic defocus diopter and high-order aberrations used in the design of different annular cylindrical microstructures A30 or annular cylindrical microstructures B31 can vary with the size of the lens aperture.

[0037] The diameter of the human pupil simulated during lens design is generally 3mm to 6mm, and the effective working area (central optical area 2 and annular microstructure distribution area 3) defined by the pupil size matches it, which is also a circular area of ​​3 to 6mm.

[0038] like Figure 5 As shown in the figure, the effective working area range is limited to 4mm pupil in bright vision environment. Figures 1 to 4 The effective visual area is intercepted within the annular microstructure distribution area 3 on the lens body 1, which is considered to be an area when the eye is looking sideways. At this time, the effective working area can simultaneously provide local regular astigmatism and irregular astigmatism. The axial direction of regular astigmatism is the radial meridian direction of the lens, pointing to or opposite to the center of the lens. The irregular astigmatism produces high-order perturbations on the incident wavefront of the human eye. In addition, Figure 1 As shown, within the annular microstructure distribution area 3, in any effective working area limited by the pupil size, the same spherical refractive power as that of the central optical area 2 can be generated.

[0039] When a lens with such a design having an annular cylindrical microstructure area on its surface is used as a substrate for personalized lathe customization, the rear surface (i.e., the concave surface) of the lens body 1 can be used as a customized processing surface for lathe turning. When the design method of the present invention is used for injection molding of batch finished products, the special molding structure area corresponding to the annular microstructure distribution area 3 needs to be processed on the side of the injection mold corresponding to the lens body 1. That is, if the convex surface of the injection-molded lens body 1 is the surface where the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 are located, the corresponding special molding structure area is processed on the concave surface of the injection mold to ensure that the annular cylindrical microstructure A30 and the annular cylindrical microstructure B31 are located on the front surface of the finished lens.

[0040] Technical personnel should note: Although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention. Any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. A lens having an annular cylindrical microstructure arranged radially and alternately on its surface, comprising a lens body (1), characterized in that: The surface of the lens body (1) is provided with a concentric circle structure, and the area of ​​the lens body (1) occupied by the concentric circle structure is an annular microstructure distribution area (3), and the concentric circle structure can be distributed on the front surface or the back surface of the lens body (1) or extend to both the front and back surfaces of the lens; A central optical region (2) is formed in a circular region with a radius of R1 and a center of the lens body (1). The central optical region (2) is located inside the annular microstructure distribution region (3). The concentric circular structure comprises a plurality of annular cylindrical microstructures A (30) and annular cylindrical microstructures B (31). The annular cylindrical microstructures A (30) and the annular cylindrical microstructures B (31) are raised on the surface of the lens body (1) and are continuous annular structures. The annular cylindrical microstructures A (30) and the annular cylindrical microstructures B (31) have different axial directions. The annular cylindrical microstructures A (30) and the annular cylindrical microstructures B (31) are arranged in an interlaced manner from inside to outside along the radial direction of the lens body (1) to generate high-order aberrations. The area after the annular cylindrical microstructures A (30) and the annular cylindrical microstructures B (31) are removed from the annular microstructure distribution region (3) is a transition region (32). The annular cylindrical microstructure A (30) and the annular cylindrical microstructure B (31) both have a base and a microstructure, the base is integrated with the lens body (1), and the microstructure is an annular cylindrical structure protruding outward from the surface of the lens body (1); one of the annular cylindrical microstructure A (30) and the annular cylindrical microstructure B (31) is a local regular astigmatism degree, the axial direction of the local regular astigmatism degree is the radial meridian direction of the lens body (1), and the axial directions of the annular cylindrical microstructure A (30) and the annular cylindrical microstructure B (31) are perpendicular to each other, and irregular astigmatism is formed by the axially perpendicular staggered distribution of the annular cylindrical microstructure A (30) and the annular cylindrical microstructure B (31), and the irregular astigmatism produces high-order disturbances on the incident wavefront of the human eye.

2. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 1, characterized in that: The concentric circle structure has the geometric center of the lens body (1) as its center, the outermost edge radius of the concentric circle structure is R2, and the annular area between R1 and R2 is defined as the annular microstructure distribution area (3).

3. The lens having annular cylindrical microstructures arranged radially alternately on its surface according to claim 1 or 2, characterized in that: According to the coverage of the annular microstructure distribution area (3) on the lens body (1), the lens is designed to have a peripheral optical zone (4) or no peripheral optical zone (4): When the outer edge of the annular microstructure distribution area (3) does not cover the edge of the lens body (1), the area of ​​the lens body (1) outside the annular microstructure distribution area (3) forms the peripheral optical area (4); when the outer edge of the annular microstructure distribution area (3) coincides with the edge of the lens body (1), there is no peripheral optical area (4).

4. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 3, characterized in that: The peripheral optical zone (4) has the same refractive power as the central optical zone (2).

5. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 1, characterized in that: The transition zone has the same refractive power as the central optical zone (2).

6. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 1, characterized in that: The annular microstructure distribution area (3) can generate the same spherical refractive power as the central optical area (2) within the effective working area defined by the pupil size.

7. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 1, characterized in that: The high-order aberrations provided by each layer of the annular cylindrical microstructure A (30) and the annular cylindrical microstructure B (31) in the concentric circle structure are not completely the same.

8. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 1, characterized in that: Each layer of the annular cylindrical microstructure A (30) and the annular cylindrical microstructure B (31) in the concentric circle structure provides the same high-order aberrations.

9. The lens having annular cylindrical microstructures arranged radially and alternately on its surface according to claim 1, characterized in that: The radial widths of each annular cylindrical microstructure A (30) and annular cylindrical microstructure B (31) in the concentric circle structure are not completely the same, and the spacing distances between each layer of annular cylindrical microstructure A (30) and annular cylindrical microstructure B (31) are not completely the same.

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