Hybrid microstructure design lens combining defocus and point diffusion functions and manufacturing method
By combining defocus and dot diffusion functions in the design of the lens, the problem of the single function of existing lenses is solved, the myopia control effect is improved and the visual quality is guaranteed, and the possibility of personalized customization is provided.
Patent Information
- Application Number
- CN202511366379.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2026-01-20
AI Technical Summary
Existing myopia control lenses mostly employ a single mechanism of action, which cannot simultaneously provide the best control effect and visual quality. A single defocus design may not be able to effectively inhibit axial elongation, while simple contrast adjustment will affect visual quality.
Design a hybrid microstructure lens that combines defocus and point diffusion functions. Multiple microlenses are set on the front surface to form a myopia defocus area, and a light diffusion area is set on the rear surface. The two partially overlap within the field of view. It is integrally molded using CR-39, polycarbonate or MR series high refractive index materials and manufactured through precision mold injection molding and precision sandblasting processes.
It achieves significantly better myopia control than a single-mechanism design, avoids optical performance interference, reduces front surface reflection glare, and provides the possibility of personalized customization.
Smart Images
Figure CN121364569A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ophthalmic optics technology, specifically to a hybrid microstructure design lens that combines defocusing and dot diffusion functions, and its manufacturing method. Background Technology
[0002] Myopia has become the most common vision health problem worldwide, especially among teenagers, where it is showing a rapid upward trend. Currently, optical interventions for myopia prevention and control are mainly based on two mechanisms: one is to inhibit axial elongation by forming a myopic defocus signal in front of the retina; the other is to slow the progression of myopia by regulating the contrast of retinal imaging.
[0003] Most existing myopia control lenses employ a single-mechanism design. Microlens array lenses use multiple tiny convex lenses on the lens surface to focus some light in front of the retina, creating a myopia defocus signal. While this design can effectively inhibit axial elongation, there is still room for improvement in its control effect. On the other hand, contrast-modulated lenses reduce the imaging contrast in specific areas through special surface treatments, but lack direct defocus stimulation, resulting in limited control effects.
[0004] Currently, there are no lens products on the market that can simultaneously integrate both myopia control mechanisms. Simple defocus design may not provide optimal control, while simple contrast adjustment can negatively impact visual quality. Therefore, there is an urgent need to develop a new type of composite functional lens that can synergistically combine both control mechanisms to provide superior myopia control while maintaining visual quality. Summary of the Invention
[0005] To address the problem of limited functionality in existing anti-spoofing lenses in the background art, this invention provides a hybrid microstructure design lens that combines defocusing and dot diffusion functions, as well as a manufacturing method thereof.
[0006] The technical solution of this invention is: a hybrid microstructure lens combining defocusing and dot diffusion functions, comprising: The front surface is provided with multiple microlenses, and different microlenses form a myopia defocus area. The microlenses have an additional refractive power of +1.5D to +6.0D higher than the basic refractive power of the lens. The rear surface is provided with a light diffusion area, which is a dot diffusion structure formed by surface frosting treatment; the myopia defocus area and the light diffusion area at least partially overlap within the field of vision with the center of the lens as the reference.
[0007] As a further improvement of the present invention, the plurality of microlenses on the front surface are distributed in an annular region with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center.
[0008] As a further improvement of the present application, the multiple microlenses are arranged in a ring type, and each ring of microlenses forms a myopic defocus region; the distribution density of microlenses in different rings decreases gradually from the center of the lens to the outside.
[0009] As a further improvement of the present application, the distance between adjacent microlenses in the center side of the ring is 0.1-0.5mm, and the distance between adjacent microlenses in the outside side of the ring is 0.5-1.5mm; the distribution density of microlenses in different rings decreases gradually from the center of the lens to the outside.
[0010] As a further improvement of the present application, the light diffusion region of the back surface is distributed in an annular region with an inner diameter of 5mm to an outer diameter of 35mm centered on the center of the lens; the overlapping field of view range of the myopic defocus region and the light diffusion region is in an annular region with an inner diameter of 6mm to an outer diameter of 35mm centered on the center of the lens.
[0011] As a further improvement of the present application, the surface roughness Ra of the point diffusion structure is 0.1-1.0μm, and the concave-convex height difference is 5-50μm.
[0012] As a further improvement of the present application, it further comprises a central region which remains optically transparent and has a diameter of 6-8mm.
[0013] As a further improvement of the present application, the additional refractive power of the microlens is +2.5D to +5.0D.
[0014] As a further improvement of the present application, the lens is integrally formed with CR-39, polycarbonate or MR series high refractive index material.
[0015] A manufacturing method of the above-mentioned mixed microstructure design lens combining defocus and point diffusion functions, comprising the following steps: Step one, forming a lens base by precision mold injection or turning processing; step two, forming a microlens array on the front surface; the microlens array is formed by photolithography or precision mold pressing process; step three, performing precision sandblasting treatment on the back surface in a specific region to form a point diffusion structure; the precision sandblasting uses aluminum oxide particles with a particle size of 50-100μm, the sandblasting pressure is 0.2-0.4MPa, the sandblasting time is 30-60 seconds, and the surface roughness Ra of the back surface reaches 0.1-1.0μm; a mask is used to protect the non-treatment area during the precision sandblasting treatment; the mask is a stainless steel mask with a thickness of 0.1mm, which is attached to the back surface of the lens by vacuum adsorption, and the edge error of the mask corresponding to the non-treatment area (the transparent area of 6-8mm from the center of the lens, and the area outside the outer diameter of 35mm from the center of the lens) is ≤0.05mm; step four, performing surface coating and hardening treatment.
[0016] The beneficial effects of this invention are that it innovatively combines the front surface defocus design and the rear surface contrast control design, and the two mechanisms work together to achieve a significantly better myopia control effect than a single mechanism design; the two functional areas are spatially separated to avoid mutual interference in optical performance; and the dot diffusion structure is set on the rear surface to effectively reduce the problem of glare reflected from the front surface. Attached Figure Description
[0017] Appendix Figure 1 This is a schematic diagram of the structure of an ophthalmic lens according to an embodiment of the present invention.
[0018] Appendix Figure 2 This is a schematic diagram of the distribution of microlenses on the anterior surface of an ophthalmic lens according to an embodiment of the present invention.
[0019] Appendix Figure 3 This is a schematic diagram of the light diffusion region distribution on the posterior surface of an ophthalmic lens according to an embodiment of the present invention.
[0020] Appendix Figure 4 This is a cross-sectional structural diagram of an ophthalmic lens according to an embodiment of the present invention.
[0021] In the figure, 1 is the front surface; 11 is the microlens; 111 is the myopic defocus area; 2 is the rear surface; 21 is the light diffusion area; 211 is the point diffusion structure; and 3 is the central area. Detailed Implementation
[0022] The embodiments of the present invention will be further described below with reference to the accompanying drawings: Depend on Figure 1 Combination Figures 2-4 As shown, an eyeglass includes a frame and a hybrid microstructure design lens that combines defocusing and dot diffusion functions. The hybrid microstructure design lens that combines defocusing and dot diffusion functions includes: The front surface 1 is provided with multiple microlenses 11, and different microlenses 11 form a myopia defocus region 111. The microlenses 11 have an additional refractive power of +1.5D to +6.0D higher than the basic refractive power of the lens. The rear surface 2 is provided with a light diffusion region 21, which is a dot diffusion structure 211 formed by surface frosting treatment; the myopia defocus region 111 and the light diffusion region 21 at least partially overlap within the field of vision with the center of the lens as the reference. The beneficial effects of this invention are that it innovatively combines the front surface defocus design and the rear surface contrast control design, and the two mechanisms work synergistically, resulting in a significantly better myopia control effect than a single mechanism design; the two functional areas are spatially separated to avoid mutual interference in optical performance; the central optical area remains clear and transparent, without affecting the wearer's main visual quality; the dot diffusion structure is set on the rear surface, effectively reducing the problem of glare reflected from the front surface; this invention can flexibly adjust the parameter combination of the two functional areas according to the needs of different wearers to achieve personalized customization.
[0023] The plurality of microlenses 11 of the front surface 1 are distributed in an annular region with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center. Specifically, the plurality of microlenses 11 are arranged in a ring type, and each ring of microlenses 11 forms a myopic defocus region 111; the distribution density of the microlenses 11 of different rings is set to decrease in a gradient from the lens center to the outside. More specifically, the spacing between adjacent rings of microlenses 11 near the center side is 0.1-0.5 mm, and the spacing between adjacent rings of microlenses 11 near the outside is 0.5-1.5 mm. The distribution density of the microlenses 11 of different rings is set to decrease in a gradient from the lens center to the outside. More specifically, refraction is the phenomenon that the propagation direction of light changes when it enters a medium with a different refractive index, and it belongs to the terminology of ophthalmology and optics. Refractive power is a physical quantity in ophthalmology that measures the refractive ability of the eye to light, and its unit is diopter (D). Under normal refractive conditions (emmetropia), light passes through the refractive system such as the cornea and the lens and can accurately focus on the retina to form a clear image. When the refractive power is abnormal, it will cause refractive errors, which are manifested as myopia, hyperopia or astigmatism, and the specific degree needs to be determined through optometry, and then corrected by glasses, contact lenses or laser surgery. Referring to the attached Figure 2 The microlenses of the front surface are preferably distributed in an annular region with an inner diameter of 9 mm to an outer diameter of 15 mm centered on the lens center. The microlens density decreases in a gradient from the inside to the outside.
[0024] The light diffusion region 21 of the back surface 2 is distributed in an annular region with an inner diameter of 5 mm to an outer diameter of 35 mm centered on the lens center. The overlapping part of the myopic defocus region 111 and the light diffusion region 21 has a visual field range in an annular region with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center. Specifically, the surface roughness Ra of the point diffusion structure 211 is 0.1-1.0 μm, and the concave-convex height difference is 5-50 μm. Referring to the attached Figure 3 The point diffusion frosted structure (light diffusion region) of the back surface is preferably distributed in an annular region B with an inner diameter of 8 mm to an outer diameter of 20 mm centered on the lens center. The frosted structure is a micro concave-convex structure with a surface roughness Ra of 0.1-1.0 μm formed by a precision sandblasting process, and the concave-convex height difference is controlled within the range of 5-50 μm, which ensures that the contrast can be effectively reduced without causing obvious visual disturbance.
[0025] The present application also includes a central region 3 which remains optically transparent and has a diameter of 6-8 mm. In this way, the central vision can be ensured. Referring to the attached Figure 4, the microlens of the front surface and the frosted structure (light diffusion area) of the back surface in the lens profile structure form a partially overlapped composite prevention and control area in space; the composite function is realized. The lens of the application is integrally formed by CR-39 (the scientific name is carbon acid propylene acetic acid, or called dially glycol carbonate), polycarbonate or MR series high refractive material (MR series is a high-performance polyurethane resin material developed by Mitsubishi Chemical of Japan).
[0026] In combination with the path characteristics of light rays through different areas, further description is as follows: Light ray L1 is directly focused on the retina through the central area 3, forming clear vision; Light ray L2 is focused in front of the retina after passing through the front surface microlens, forming an effective myopia defocus signal; Light ray L3 occurs controllable scattering after passing through the back surface frosted structure (point diffusion structure), moderately reducing the imaging contrast; Light ray L4 passes through the microlens and the frosted structure at the same time, forming defocus and reducing contrast, producing a synergistic prevention and control effect.
[0027] A manufacturing method of a lens designed with a mixed microstructure combining defocus and point diffusion functions, comprising the following steps: Step one, forming a lens base by precision mold injection or turning processing; Step two, forming a microlens 11 array on the front surface 1; the microlens 11 array is formed by photolithography or precision mold pressing process; Step three, performing precision sandblasting treatment on the back surface 2 to form a point diffusion structure 211; the precision sandblasting uses aluminum oxide particles with a particle size of 50-100 μm, the sandblasting pressure is 0.2-0.4 MPa, the sandblasting time is 30-60 seconds, and the roughness Ra of the back surface is ensured to reach 0.1-1.0 μm; the precision sandblasting treatment adopts a mask to protect the non-treatment area; the mask is a stainless steel mask with a thickness of 0.1 mm, which is attached to the back surface of the lens by vacuum adsorption, and the edge error of the mask corresponding to the non-treatment area is ≤0.05 mm; Step four, performing surface coating and hardening treatment.
[0028] In the description of the application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0029] In the description of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connected", "connecting" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.
[0030] Skilled person should know: although the present application has been described according to the above specific embodiments, the inventive idea of the present application is not limited to this invention, any modification using the inventive idea of the present application will be included in the scope of protection of the present application patent.
Claims
1. A hybrid microstructure design lens combining the functions of defocus and point spread, characterized in that: It comprises: a front surface (1) provided with a plurality of microlenses (11), different microlenses (11) forming myopic defocus regions (111), the microlenses (11) having an additional refractive power of +1.5D to +6.0D higher than the base refractive power of the lens; a rear surface (2) provided with a light diffusion region (21), the light diffusion region (21) being a point diffusion structure (211) formed by surface frosting; the myopic defocus regions (111) and the light diffusion region (21) at least partially overlap in the field of view based on the lens center.
2. The hybrid microstructure designed lens combining the functions of defocus and point spread according to claim 1, characterized in that The plurality of microlenses (11) of the front surface (1) are distributed in an annular region with an inner diameter of 6mm to an outer diameter of 35mm centered on the lens center.
3. The hybrid microstructure designed lens combining the functions of defocus and point spread according to claim 2, characterized in that The plurality of microlenses (11) are arranged in a ring type, and each ring of microlenses (11) forms a myopic defocus region (111); the distribution density of microlenses (11) in different rings decreases gradually from the lens center to the outside.
4. The hybrid microstructure designed lens combining the functions of defocus and point spread according to claim 3, characterized in that The spacing between adjacent ring layers of microlenses (11) near the center side is 0.1-0.5mm, and the spacing between adjacent ring layers of microlenses (11) near the outside is 0.5-1.5mm; the distribution density of microlenses (11) in different rings decreases gradually from the lens center to the outside.
5. The hybrid microstructure designed lens combining the functions of defocus and point spread according to claim 1, wherein The light diffusion region (21) of the rear surface (2) is distributed in an annular region with an inner diameter of 5mm to an outer diameter of 35mm centered on the lens center; the overlapping field of view of the myopic defocus regions (111) and the light diffusion region (21) is in the annular region with an inner diameter of 6mm to an outer diameter of 35mm based on the lens center.
6. The hybrid microstructure design lens incorporating both defocus and point spread functions of claim 5, wherein The surface roughness Ra of the point diffusion structure (211) is 0.1-1.0μm, and the concave-convex height difference is 5-50μm.
7. The hybrid microstructure design lens incorporating both defocus and point spread functions of claim 1, wherein It also includes a central region (3) that remains optically transparent with a diameter of 6-8mm.
8. The hybrid microstructure design lens incorporating both defocus and point spread functions of claim 1, wherein The additional refractive power of the microlenses (11) is +2.5D to +5.0D.
9. The hybrid microstructure design lens incorporating both defocus and point spread functions of claim 1, wherein The lens is integrally formed from CR-39, polycarbonate or MR series high refractive index material.
10. A method of manufacturing a lens designed with a hybrid microstructure incorporating the functions of both defocus and point spread according to any one of claims 1-9, characterized in that: It comprises the following steps: Step one, forming a lens base by precision mold injection or turning; Step two, forming a microlens (11) array on the front surface (1); the microlens (11) array is formed by photolithography or precision mold pressing process; Step three, performing precision sandblasting on the rear surface (2) in a specific area to form a point diffusion structure (211); the precision sandblasting uses aluminum oxide sand particles with a particle size of 50-100μm, a sandblasting pressure of 0.2-0.4MPa, and a sandblasting time of 30-60 seconds to ensure that the rear surface roughness Ra reaches 0.1-1.0μm; the precision sandblasting process uses a mask to protect the non-treatment area; the mask is a stainless steel mask with a thickness of 0.1mm, which is attached to the rear surface of the lens by vacuum suction, and the edge error of the mask corresponding to the non-treatment area (lens center 6-8mm transparent area, area outside the outer diameter of 35mm from the lens center) is ≤0.05mm; Step four, surface coating and hardening treatment.