Miniature dot matrix contrast reduction lens

Abstract

The utility model relates to the technical field of optical lenses, in particular to a miniature dot matrix contrast-reducing lens, which comprises a lens, the lens comprises a central optical area and a miniature dot matrix area, the miniature dot matrix area comprises two dot matrix structures, namely a large dot matrix with the diameter of 0.18 mm and a small dot matrix with the diameter of 20-30 microns, the number ratio of the large dot matrix to the small dot matrix is 1: 3-1: 8, and the number ratio of the large dot matrix to the small dot matrix is 1: 3-1: 8. The covering density of the dot matrix areas is 10-45%, the dot matrix spacing is 0.2-0.65 mm, the depth of the dot matrix is 2-8 microns, the edge of the dot matrix is provided with a smooth transition area of 0.05-0.1 mm, the lens further comprises micro-lens areas, and the micro-dot matrix areas and the micro-lens areas are alternately distributed. The central optical area of the lens is not covered by the dot matrix, so that clear view is guaranteed; the contrast of the dot matrix area is accurately regulated and controlled, full-view blurring is avoided, micro-lens defocusing and dot matrix contrast reduction are combined, eye axis growth is doubly inhibited, dot matrix size and interval optimization is achieved, and glare and visual interference are reduced.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, specifically to a micro-dot array contrast-reducing lens. Background Technology

[0002] Myopia has become an increasingly serious public health problem worldwide. Its pathogenesis is closely related to the quality of retinal imaging. Studies have shown that excessive retinal imaging contrast can stimulate abnormal growth of the axial length of the eye, while peripheral defocus effect (especially hyperopic defocus) is a key factor driving the progression of myopia. Traditional myopia prevention and control methods mainly rely on optical correction, but simple photometric correction cannot effectively intervene in these pathogenic mechanisms. There is an urgent need to develop new optical solutions that can simultaneously regulate imaging contrast and defocus state.

[0003] Currently, myopia control lenses on the market are mainly divided into two categories: one is multi-point defocus lenses based on microlens arrays (such as Hoya NeoLearning and Essilor Star Control), which form myopia defocus signals by setting microlenses on the lens surface; the other is contrast-modulating lenses (such as SightGlass lenses), which use scattering particles or microstructures to reduce the imaging contrast of the central and peripheral retina. In addition, some traditional dot matrix lenses achieve light scattering through regularly arranged micro dot matrix structures, but their dot matrix parameter design is mostly based on experience and lacks systematic optical optimization.

[0004] Existing technologies have significant limitations: while multi-point defocus lenses can produce myopia defocus, they do not actively regulate image contrast, thus limiting their control effect; while contrast-modulated lenses can suppress axial elongation, the large-scale blurring process reduces peripheral visual clarity, potentially affecting wearing safety. At the same time, traditional fractional lenses lack optimized design for retinal imaging characteristics in terms of dot size (usually >100μm), distribution density (fixed pattern), and coverage area (mostly limited to the periphery of the lens), which may lead to insufficient effective control area or introduce unnecessary visual interference. These problems severely restrict the clinical efficacy and user experience of myopia control lenses. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a micro-dot matrix contrast-reducing lens, which can effectively solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a micro-dot matrix contrast-reducing lens, including a lens, the lens including a central optical area and a micro-dot matrix area;

[0008] The micro-lattice region includes two lattice structures:

[0009] Large dot matrix, with a diameter of 0.18mm;

[0010] Small dot matrix, with a diameter of 20-30μm;

[0011] The ratio of the number of large dot matrix to small dot matrix is ​​1:3 to 1:8;

[0012] The coverage density of the dot matrix area is 10-45%, and the dot matrix spacing is 0.2-0.65 mm;

[0013] The depth of the dot matrix is ​​2-8 μm, and the edges of the dot matrix have a smooth transition zone of 0.05-0.1 mm.

[0014] The lens also includes a microlens region, wherein the micro-dot matrix region and the microlens region are alternately distributed.

[0015] Furthermore, the defocusing amount of the microlens region is +2.5D to +6.0D, the diameter of the microlens region is 80-200μm, and the spacing between the microlens regions is 0.3-1.0mm.

[0016] Furthermore, the diameter of the central optical area is 3-6mm, the coverage diameter of the micro dot matrix area is 3-65mm, and a transition area with a width of 0.5-1.5mm is provided between the central optical area and the micro dot matrix area.

[0017] Furthermore, the microlens regions are distributed in concentric circles, the defocusing difference between adjacent microlens regions is 0.5-1.5D, and the height of the microlens regions is 5-15μm.

[0018] Furthermore, the refractive index of the lens is 1.50-1.74, and the Abbe number is 35-58.

[0019] Furthermore, the surface of the micro-dot matrix area is provided with a blue light blocking coating with a blue light blocking rate of 10-30%.

[0020] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0021] Safety: The central optical zone is free of dot matrix coverage, ensuring a clear field of view; the dot matrix area precisely controls contrast to avoid blurring across the entire field of view;

[0022] Synergistic prevention and control: Combining microlens defocusing and dot matrix contrast reduction, it dually inhibits axial elongation;

[0023] Comfort: Optimized dot matrix size and spacing reduce glare and visual interference. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] The labels in the diagram represent:

[0027] 1. Central optical area; 2. Micro-array area; 3. Microlens area. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] Example 1:

[0031] Reference Figure 1 The first embodiment of this utility model discloses a micro-dot matrix contrast-reducing lens, including a lens with a refractive index of 1.50-1.74 (preferably 1.56 or 1.60) and an Abbe number of 35-58 (preferably 40-45). The lens includes a central optical region 1 and a micro-dot matrix region 2.

[0032] The central optical region 1 has a diameter of 3-6 mm (preferably 4-5 mm) and is used to provide clear central field of view imaging. The micro-dot matrix region 2 is an annular area with a coverage diameter of 3-65 mm (adjustable according to the lens size, preferably 30-50 mm). A gradient transition region is provided between the central optical region 1 and the micro-dot matrix region 2. The width of this transition region is 0.5-1.5 mm (preferably 0.8-1.2 mm) to achieve a smooth transition of optical characteristics. The surface of the micro-dot matrix region 2 is coated with an anti-blue light coating through a vacuum coating process. The blue light blocking rate of this coating is 10-30% (preferably 15-25%), which can selectively filter blue light in the 415-455 nm wavelength band.

[0033] The micro-lattice region 2 includes two precisely designed lattice structures:

[0034] The large dot matrix has a diameter of 0.18 mm (tolerance ±0.02 mm) and is arranged in regular hexagons;

[0035] Small dot arrays, with a diameter of 20-30μm (preferably 25μm), are randomly distributed in the gaps between large dot arrays; the ratio of large dot arrays to small dot arrays is 1:3 to 1:8 (preferably 1:5), and they are formed by precision CNC machining.

[0036] The coverage density of the micro-matrix region 2 is 10-45% (preferably 20-35%), and the center-to-center spacing of the matrices is 0.2-0.65mm (preferably 0.3-0.5mm); each matrices have a recess depth of 2-8μm (preferably 3-5μm), and the edges of the matrices are provided with a smooth optical transition zone of 0.05-0.1mm (preferably 0.07mm), which adopts a quadratic surface design;

[0037] The lens also includes microlens regions 3, micro-dot array regions 2 and microlens regions 3 are arranged alternately, wherein the defocus amount of microlens regions 3 is +2.5D to +6.0D (gradient setting, preferably +3.0D to +5.0D), the diameter of microlens regions 3 is 80-200μm (gradient setting, preferably 100-150μm), the center spacing of microlens regions 3 is 0.3-1.0mm (gradient setting, preferably 0.5-0.8mm), the microlens regions 3 are distributed in 5-8 concentric circles, the defocus difference between adjacent microlens regions 3 is 0.5-1.5D (preferably 0.8D), the height of microlens regions 3 is 5-15μm (gradient setting, preferably 8-12μm), and each microlens region 3 adopts an aspherical design to optimize optical performance.

[0038] The remaining structure is the same as that in Example 1.

[0039] The following is a description of the working process of this micro-dot matrix contrast-reducing lens, based on the technical features described in the claims:

[0040] Optical partitioning collaborative working process:

[0041] The lens provides a clear central field of view imaging through the central optical zone 1, while the alternating distribution of the micro-array zone 2 and the microlens zone 3 forms a composite optical control zone. When light is incident:

[0042] Central optical zone 1 maintains high-contrast imaging of the fovea of ​​the retina;

[0043] The micro-dot array, through a specific ratio combination (1:3 to 1:8) of 0.18mm large dot array and 20-30μm small dot array, produces controllable scattering at a coverage density of 10-45%, reducing the imaging contrast of the peripheral retina by 35-60%.

[0044] Microlens region 3 forms discrete myopia defocus signals with a defocus amount of +2.5D to +6.0D within a diameter range of 80-200μm.

[0045] Dynamic optical correction process:

[0046] The lattice structure, with a depth difference of 2-8 μm and a smooth edge transition of 0.05-0.1 mm, causes directional scattering of incident light.

[0047] The large dot matrix primarily controls contrast within a 30-60 degree field of view;

[0048] The small dot matrix is ​​responsible for fine adjustment of the near-field field of view from 5 to 30 degrees;

[0049] The concentrically distributed microlens region 3 forms a stepped defocus zone in the peripheral part of the retina through a progressive defocus difference of 0.5-1.5D. The height difference of each microlens is 5-15μm to ensure a smooth transition of the defocus gradient.

[0050] The process of implementing composite functions:

[0051] The anti-blue light coating (blue light blocking rate of 10-30%) works synergistically with the dot matrix structure to reduce the intensity of short-wavelength light while maintaining color recognition.

[0052] A substrate with a refractive index of 1.50-1.74 and an Abbe number of 35-58 ensures that the optical performance of the micro-lattice region 2 and the microlens region 3 are matched.

[0053] The transition zone (0.5-1.5mm wide) achieves a gradual change in optical correction from the central optical zone 1 to the peripheral zone, avoiding image jumps.

[0054] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A micro-dot matrix contrast-reducing lens, characterized in that, Includes a lens, the lens comprising a central optical region (1) and a micro-array region (2); The micro-lattice region (2) includes two lattice structures: Large dot matrix, with a diameter of 0.18mm; Small dot matrix, with a diameter of 20-30μm; The ratio of the number of large dot matrix to small dot matrix is ​​1:3 to 1:8; The coverage density of the dot matrix area is 10-45%, and the dot matrix spacing is 0.2-0.65 mm; The depth of the dot matrix is ​​2-8 μm, and the edges of the dot matrix have a smooth transition zone of 0.05-0.1 mm. The lens also includes a microlens region (3), and the micro dot matrix region (2) and the microlens region (3) are alternately distributed.

2. The micro-dot matrix contrast-reducing lens according to claim 1, characterized in that, The defocusing amount of the microlens region (3) is +2.5D to +6.0D, the diameter of the microlens region (3) is 80-200μm, and the spacing of the microlens region (3) is 0.3-1.0mm.

3. The micro-dot matrix contrast-reducing lens according to claim 1, characterized in that, The diameter of the central optical area (1) is 3-6 mm, the coverage diameter of the micro dot matrix area (2) is 3-65 mm, and a transition area with a width of 0.5-1.5 mm is provided between the central optical area (1) and the micro dot matrix area (2).

4. The micro-dot matrix contrast-reducing lens according to claim 1, characterized in that, The microlens regions (3) are arranged in concentric circles, and the defocusing difference between adjacent microlens regions (3) is 0.5-1.5D. The height of the microlens regions (3) is 5-15μm.

5. A micro-dot matrix contrast-reducing lens according to claim 1, characterized in that, The lens has a refractive index of 1.50-1.67 and an Abbe number of 35-58.

6. A micro-dot matrix contrast-reducing lens according to claim 1, characterized in that, The surface of the micro-dot matrix area (2) is provided with a blue light blocking coating with a blue light blocking rate of 10-30%.

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