Lens with optical path difference regulation and control structure
By designing optical path difference-adjustable lenses and utilizing microlens arrays and gradient refractive indices, the problem of insufficient contrast control in myopia control lenses was solved, achieving highly efficient myopia correction.
Patent Information
- Application Number
- CN202520167101.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing myopia control lenses have insufficient contrast control, resulting in unsatisfactory optical fidelity and an inability to accurately correct myopia.
Design a lens with optical path difference control structure, including a substrate and a lens section. The lens section contains a microlens array. The microlens array is designed with different focal points and gradient refractive indices to adapt to the distribution characteristics of human eye cells, providing high-order signal modulation and precise contrast control.
It achieves improved contrast control, enhances optical fidelity, and can accurately adapt to the myopia correction needs of specific groups of people.
Smart Images
Figure CN223650854U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical lens technology, specifically to a lens with an optical path difference control structure. Background Technology
[0002] Myopia control lenses utilize special optical designs to focus peripheral light at specific locations in front of or behind the retina, altering retinal growth signals and slowing axial elongation. Among related technologies, myopia control lenses are primarily developed based on DOT, DIMS, and DISC technologies. DOT lenses are developed based on the theory of retinal contrast signals; DISC is a soft corneal contact technology commonly used in contact lenses; and DIMS lenses are based on peripheral defocus theory. Both DIMS and DISC lenses rely on defocus control.
[0003] In related technologies, myopia control lenses suffer from poor optical fidelity due to insufficient contrast control. The microlenses in the lenses are usually uniformly distributed, while human eye cells are not uniformly arranged. Conventional myopia control lenses do not perform well enough. Therefore, there is an urgent need to develop a new type of structural lens to meet the growing demand for myopia control. Utility Model Content
[0004] To address the shortcomings of existing technologies, this application provides a lens with an optical path difference control structure, which solves the problems of insufficient contrast control and inaccurate myopia correction in current myopia control lenses.
[0005] To achieve the above objectives, this application provides the following technical solution:
[0006] In a first aspect, embodiments of this application provide an optical path difference control structure lens, which includes a substrate and a lens portion; the substrate provides a connecting surface recessed inward; the lens portion is adjacent to the connecting surface of the substrate, and the lens portion includes a microlens array, which includes a plurality of sequentially arranged microlenses to form an ultrastructure region for optical path difference control, and the inner side of the ultrastructure region is provided with a central region without microlenses.
[0007] Specifically, at least some of the microlenses have different focal points, and the static local curvature corresponding to the outer contour surface of the microlens gradually changes with different distances from its own geometric center; the microlens array includes multiple first array parts and multiple second array parts distributed at intervals, the first array parts are closed along their own circumference, and the second array parts are discretely distributed in space; the multiple first array parts have a consistent contour shape and their size gradually increases from the inside to the outside of the ultrastructure region.
[0008] According to a first aspect of the embodiments of this application, the microlens is a nanoscale diffraction structure and has an effective haze of no more than 15% to reduce the spatial frequency and imaging accuracy of incident light in the ultrastructure region; the ultrastructure region forms a gradient refractive index through a geometric array distribution of multiple microlenses.
[0009] According to a first aspect of the embodiments of this application, each first array portion includes a first lens layer and a second lens layer distributed at intervals, wherein the first lens layer alternately approaches and moves away from the second lens layer along its own circumference.
[0010] According to a first aspect of the embodiments of this application, at least some of the microlenses arranged along their circumference in the first lens layer and the second lens layer have gradually varying sizes, with the microlens size ranging from 0.01mm to 0.25mm; the diameter of the central region ranging from 5mm to 9mm; and the area size of the microstructure region ranging from 30mm to 70mm.
[0011] According to a first aspect of the embodiments of this application, the outer contour of the central region is centrally symmetrical and includes a plurality of first corner portions and a plurality of second corner portions, wherein the first corner portions and the second corner portions protrude outward and are recessed inward based on the geometric center of the central region, respectively.
[0012] According to a first aspect of the embodiments of this application, a plurality of microlenses in the first array portion and the second array portion are arranged at intervals along the first arc-shaped extension line and the second arc-shaped extension line, respectively; a portion of the first arc-shaped extension line and the second arc-shaped extension line, corresponding to the central region, are aligned with the convex direction of the first corner portion, and another portion is aligned with the concave direction of the second corner portion.
[0013] According to a first aspect of the embodiments of this application, there are four first corner portions and four second corner portions. The outer contours of the multiple microlenses are identical and coated. One side of the lens portion is convex to match the connection surface of the substrate.
[0014] According to a first aspect of the embodiments of this application, the defocus amount De of the microlens satisfies: +4.50D≤De≤+10.00D, where D represents diopter and +10.00D is the extreme defocus; the microlens reaches the extreme defocus within an 8° field of view, and the defocus amount of the microlens is positively correlated with the field of view.
[0015] According to a first aspect of the embodiments of this application, the ultrastructure region further includes a substrate region, which is composed of gaps between multiple microlenses. The first intermolecular bonding form of the substrate region is different from the second intermolecular bonding form of the microlenses to change the scattering signal of the incident light and provide higher-order signal modulation for optical path difference control.
[0016] According to a first aspect of the embodiments of this application, the ratio of the sum of the areas of a plurality of microlenses to the area of the substrate region is the fill rate of the ultrastructure region, and the fill rate is set in the range of 0.07-0.25.
[0017] This application provides a lens with an optical path difference adjustment structure. Compared with the prior art, it has the following advantages:
[0018] The optical path difference control lens of this application has a lens section on one side of the substrate. This lens section includes a central region and a microstructure region. The central region does not have microlenses to meet the requirements for central region sharpness. The microstructure region has multiple microlenses with different focal points for optical path difference control. The optical path difference not only changes the focal point but also changes the scattering signal of the incident light, providing higher-order signal modulation, thereby achieving ideal contrast control to improve optical fidelity. The multiple first array sections of this application have a consistent contour shape, so that the distribution pattern of multiple microlenses in the entire microstructure region is consistent, which can correspond to specific human eye cell distribution characteristics. This allows the optical path difference control of the entire lens section to accurately adapt to the myopia correction needs of certain specific groups of people. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the optical path difference adjustment structure lens provided in an embodiment of this application;
[0021] Figure 2 This is a schematic diagram of the lens section provided in an embodiment of this application;
[0022] Figure 3 yes Figure 2 Enlarged view of point a in the middle;
[0023] Figure 4 yes Figure 2 Enlarged view of point b in the middle;
[0024] Figure 5 yes Figure 3 Enlarged diagram of point c in the middle.
[0025] Reference numerals: 1. Substrate; 2. Lens section; 3. Microlens; 4. First array section; 41. First lens layer; 42. Second lens layer; 5. Second array section; A. Ultrastructure region; B. Central region; C. First corner section; D. Second corner section. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.
[0028] This application provides an optical path difference control structure lens, which solves the problems of insufficient contrast control and inaccurate myopia correction in current myopia control lenses.
[0029] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:
[0030] Myopia control lenses utilize special optical designs to focus peripheral light at specific locations in front of or behind the retina, altering retinal growth signals and slowing axial elongation. Among related technologies, myopia control lenses are primarily developed based on DOT, DIMS, and DISC technologies. DOT lenses are developed based on the theory of retinal contrast signals; DISC is a soft corneal contact technology commonly used in contact lenses; and DIMS lenses are based on peripheral defocus theory. Both DIMS and DISC lenses rely on defocus control.
[0031] In related technologies, myopia control lenses suffer from poor optical fidelity due to insufficient contrast control. The microlenses in the lenses are usually uniformly distributed, while human eye cells are not uniformly arranged. Conventional myopia control lenses do not perform well enough. Therefore, there is an urgent need to develop a new type of structural lens to meet the growing demand for myopia control.
[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0033] The following is a description of an optical path difference control structure lens provided in the embodiments of this application.
[0034] Please refer to the optical path difference adjustment structure lens provided in this application embodiment. Figures 1-5 The optical path difference control structure lens includes a substrate 1 and a lens portion 2; the substrate 1 provides a connecting surface that is recessed inward; the lens portion 2 is adjacent to the connecting surface of the substrate 1, and the lens portion 2 includes a microlens array, which includes a plurality of microlenses 3 arranged in sequence to form an ultrastructure region A for optical path difference control, and a central region B without microlenses 3 is provided on the inner side of the ultrastructure region.
[0035] Specifically, at least some of the microlenses 3 have different focal points, and the static local curvature corresponding to the outer contour surface of the microlens 3 gradually changes with different distances from its own geometric center; the microlens array includes multiple first array parts 4 and multiple second array parts 5 distributed at intervals, the first array parts 4 are closed along their own circumference, and the second array parts 5 are discretely distributed in space; the multiple first array parts 4 have a consistent contour shape and their size gradually increases from the inside to the outside of the ultrastructure region A.
[0036] In the embodiments of this application, it is understood that the optical path difference control lens of this application has a lens portion 2 disposed on one side of the substrate 1. The lens portion 2 includes a central region B and a microstructure region A. The central region B is not provided with microlenses 3 to meet the requirements for the sharpness of the central region B. The microstructure region A is provided with multiple microlenses 3 with different focal points for optical path difference control. In addition to changing the focal point, the optical path difference can also change the scattering signal of the incident light, providing higher-order signal modulation, thereby achieving ideal contrast control to improve optical fidelity.
[0037] Furthermore, the multiple first array sections 4 of this application have a consistent outline shape, which makes the distribution pattern of multiple microlenses 3 consistent throughout the entire microstructure region A, and can correspond to specific human eye cell distribution characteristics, so that the optical path difference adjustment effect of the entire lens section 2 can accurately adapt to the myopia correction needs of specific groups of people.
[0038] In some embodiments, the microlens 3 is a nanoscale diffraction structure with an effective haze of no more than 15% to reduce the spatial frequency and imaging accuracy of incident light in the ultrastructure region A; the ultrastructure region A forms a gradient refractive index through the geometric array distribution of multiple microlenses 3.
[0039] In the embodiments of this application, it can be understood that the haze control of the microlens 3 is carried out at the nanoscale, which can provide high-fidelity optical effects while reducing imaging power; the effective defocus amount of the ultra-microstructure region A is large, the compliance and control effect are better, and the image quality can be optimized by forming a gradient refractive index.
[0040] In some embodiments, please refer to Figure 5 Each first array section 4 includes a first lens layer 41 and a second lens layer 42 spaced apart, with the first lens layer 41 and the second lens layer 42 alternately moving closer and further apart along their own circumference.
[0041] In the embodiments of this application, it can be understood that the first lens layer 41 and the second lens layer 42 in each first array section 4 alternately approach and move away from each other. Within the entire area of the microstructure region A, the multiple first lens layers 41 and the multiple second lens layers 42 extend in a curved shape, which can form a relatively uniform and locally dense distribution effect of microlenses 3.
[0042] In some embodiments, please refer to Figure 5 The size of at least some of the microlenses 3 arranged along their circumference in the first lens layer 41 and the second lens layer 42 gradually changes, and the size range of the microlenses 3 is 0.01mm-0.25mm; the diameter range of the central region B is 5mm-9mm, and the size range of the ultra-microstructure region A is 30mm-70mm.
[0043] In the embodiments of this application, it can be understood that by controlling the size of the microlens 3 to be within a small range, more microlenses 3 can be accommodated per unit area in the microstructure region A, forming a continuous ultra-low disturbance defocus zone and achieving high-intensity optical path difference control.
[0044] In some embodiments, please refer to Figure 3 The outer contour of the central region B is centrally symmetrical and includes multiple first corners C and multiple second corners D. The first corners C and the second corners D protrude outward and inward respectively based on the geometric center of the central region B.
[0045] In this embodiment, the first corner C and the second corner D correspond to the shape of the central region B. The central region B is required to ensure clear vision. The central region B corresponds to the macula of the human eye. It is understood that a circular central region B is the ideal state, and there will be differences for different groups of people. Based on the needs of a specific group of people, by setting multiple first corners C and multiple second corners D, the outer contour of the non-circular central region B can have a specific curvature.
[0046] In some embodiments, please refer to Figure 2 and Figure 3The multiple microlenses 3 in the first array section 4 and the second array section 5 are arranged at intervals along the first arc-shaped extension line and the second arc-shaped extension line, respectively; a part of the first arc-shaped extension line and the second arc-shaped extension line corresponding to the central region B are aligned with the convex direction of the first corner section C, and another part of the line is aligned with the concave direction of the second corner section D.
[0047] In the embodiments of this application, it can be understood that within the area of the microstructure region A, the arrangement pattern of the first array part 4 and the second array part 5 corresponds to the outer contour of the central region B. Since the outer contour of the central region B is set based on the actual needs of a specific group of people, the optical path difference adjustment of the multiple microlenses 3 in the first array part 4 and the second array part 5 can correspond to the actual needs of a specific group of people, thereby specifically controlling the scattering signal of the incident light.
[0048] In one example, please refer to... Figure 2 and Figure 3 The first corner portion C and the second corner portion D each have four parts. The outer contours of the multiple microlenses 3 are identical and coated. One side of the lens portion 2 is convex to match the connection surface of the substrate 1. It can be understood that the periodic distribution of the microlenses 3 is related to the arrangement of biological cells in the human eye. For example, when the central region A is arranged in a near-quadrilateral shape, the lens has a better myopia correction effect for people with high astigmatism.
[0049] In another example, the defocus amount De of microlens 3 satisfies: +4.50D≤De≤+10.00D, where D represents diopter and +10.00D is the extreme defocus; microlens 3 reaches extreme defocus within an 8° field of view, and the defocus amount of microlens 3 is positively correlated with the field of view.
[0050] In some embodiments, please refer to Figure 2 and Figure 3 The ultrastructure region A also includes a substrate region, which is composed of gaps between multiple microlenses 3. The first intermolecular bonding form of the substrate region is different from the second intermolecular bonding form of the microlenses 3 to change the scattering signal of the incident light and provide higher-order signal modulation for optical path difference control.
[0051] In the embodiments of this application, it can be understood that the intermolecular bonding forms of the materials corresponding to the substrate region and the multiple microlenses 3 are different. The resin structure of the microlenses 3 is smaller and filled with metal ions or metal oxides, which is beneficial to the control of optical path. In addition, the substrate region and the multiple microlenses 3 are integrally formed, and the multiple microlenses 3 are densely arranged in the ultrastructure region A, which is also beneficial to improve the relative stability between the microlenses 3 and the substrate region and improve the structural strength.
[0052] It should also be noted that the ratio of the sum of the areas of the multiple microlenses 3 to the area of the substrate region is the filling rate of the ultrastructure region A. The filling rate can be adjusted according to actual needs. In this application, the filling rate is set in the range of 0.07-0.25.
[0053] In summary, compared with the prior art, this application has the following beneficial effects:
[0054] 1. The lens part 2 of this application includes a central region B and an ultrastructure region A. The ultrastructure region A is provided with multiple microlenses 3 with different focal points to control the optical path difference. In addition to changing the focal point, the optical path difference can also change the scattering signal of the incident light, provide high-order signal modulation, and thus achieve ideal contrast control to improve the optical fidelity effect.
[0055] 2. The multiple first array sections 4 of this application have a consistent outline shape, which makes the distribution pattern of multiple microlenses 3 consistent within the entire ultrastructure region A. This allows the distribution of multiple microlenses 3 to correspond to the macular characteristics of certain specific populations, enabling the optical path difference adjustment effect of the entire lens section 2 to accurately adapt to specific myopia correction needs.
[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A lens with an optical path difference adjustment structure, characterized in that, include: A substrate (1) having a connecting surface recessed inwards; and Lens section (2), the lens section (2) is adjacent to the connecting surface of the substrate (1), the lens section (2) includes a microlens array, the microlens array includes a plurality of microlenses (3) arranged in sequence to form an ultrastructure region (A) for optical path difference control, and the inner side of the ultrastructure region is provided with a central region (B) where the microlenses (3) are not provided. Among them, at least some of the multiple microlenses (3) have different focal points, and the static local curvature corresponding to the outer contour surface of the microlens (3) gradually changes with the distance from its own geometric center; The microlens array includes a plurality of first array portions (4) and a plurality of second array portions (5) spaced apart. The first array portions (4) are closed along their own circumference, and the second array portions (5) are discretely distributed in space. The plurality of first array portions (4) have a consistent profile shape and their size gradually increases from the inside to the outside of the ultrastructure region (A).
2. The optical path difference adjustment structure lens as described in claim 1, characterized in that, The microlens (3) is a nanoscale diffraction structure with an effective haze of no more than 15% to reduce the spatial frequency and imaging accuracy of incident light in the ultrastructure region (A); the ultrastructure region (A) forms a gradient refractive index through the geometric array distribution of the multiple microlenses (3).
3. The optical path difference adjustment structure lens as described in claim 1 or 2, characterized in that, Each of the first array portions (4) includes a first lens layer (41) and a second lens layer (42) spaced apart, wherein the first lens layer (41) alternately approaches and moves away from the second lens layer (42) along its circumference.
4. The optical path difference adjustment structure lens as described in claim 3, characterized in that, The size of at least some of the microlenses (3) arranged along their circumference in the first lens layer (41) and the second lens layer (42) gradually changes, and the size range of the microlenses (3) is 0.01mm-0.25mm; the diameter range of the central region (B) is 5mm-9mm; and the size range of the microstructure region (A) is 30mm-70mm.
5. The optical path difference adjustment structure lens as described in claim 1 or 2, characterized in that, The outer contour of the central region (B) is centrally symmetrical and includes a plurality of first corner portions (C) and a plurality of second corner portions (D), wherein the first corner portions (C) and the second corner portions (D) protrude outward and are recessed inward based on the geometric center of the central region (B), respectively.
6. The optical path difference adjustment structure lens as described in claim 5, characterized in that, The multiple microlenses (3) in the first array section (4) and the second array section (5) are arranged at intervals along the first arc-shaped extension line and the second arc-shaped extension line, respectively; A portion of the first arc-shaped extension line and the second arc-shaped extension line corresponding to the central region (B) are aligned with the convex direction of the first corner (C), while another portion is aligned with the concave direction of the second corner (D).
7. The optical path difference adjustment structure lens as described in claim 5, characterized in that, The number of the first corner portion (C) and the second corner portion (D) are both four. The outer contours of the multiple microlenses (3) are consistent and coated. One side of the lens portion (2) is convex to match the connecting surface of the substrate (1).
8. The optical path difference adjustment structure lens as described in claim 1 or 2, characterized in that, The defocus amount De of the microlens (3) satisfies: +4.50D≤De≤+10.00D, where D represents diopter and +10.00D is the extreme defocus; the microlens (3) reaches the extreme defocus within an 8° field of view, and the defocus amount of the microlens (3) is positively correlated with the field of view.
9. The optical path difference adjustment structure lens as described in claim 1 or 2, characterized in that, The ultrastructure region (A) also includes a substrate region, which is composed of the gaps between the plurality of microlenses (3). The first intermolecular bonding form of the substrate region is different from the second intermolecular bonding form of the microlenses (3) to change the scattering signal of the incident light and provide higher-order signal modulation for optical path difference control.
10. The optical path difference adjustment structure lens as described in claim 9, characterized in that, The ratio of the sum of the areas of the plurality of microlenses (3) to the area of the substrate region is the filling rate of the ultrastructure region (A), and the filling rate is set in the range of 0.07-0.25.