Micro-lens and speckle combined lens and glasses

Abstract

The utility model provides a micro lens and speckle combined lens and glasses, the lens comprises a basic lens, the basic lens is divided into a central area and a peripheral area surrounding the central area, the central area is provided with an optical area and a speckle area I surrounding the optical area, and the speckle area I is provided with a plurality of speckle structures I; the peripheral area is provided with a plurality of layers of micro-lens annular arrays, and the plurality of layers of micro-lens annular arrays are arranged around the central area; and in the plurality of layers of micro lens annular arrays, each layer of micro lens annular array is formed by arranging a plurality of groups of micro lenses at intervals, and each group of micro lenses comprises a plurality of micro lens units. According to the utility model, the micro lens and the speckle design are fused, and the double paths can simultaneously generate two effects of peripheral myopia defocus and retina contrast reduction, so that the growth of the ocular axis is effectively delayed through the double paths.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical technology field, concretely relates to a kind of lens and glasses of microlens combined speckle. BACKGROUND

[0002] Most of myopia control lenses on the current market adopt single optical mechanism, which has certain deficiencies. Common designs include peripheral defocus type lenses (such as multifocal ring or microlens array) and contrast regulation type lenses (such as diffusion optics DOT lenses). The former slows down the axial elongation by introducing relative positive defocus (myopic eye imaging forward shift) at the retinal periphery, but only targets defocus signals and does not directly handle retinal imaging contrast; the latter delays myopia progression by adding micro-scattering elements in the lens to reduce imaging contrast, but lacks additional positive defocus stimulation. These two types of lenses have their own advantages, but each only targets a single target signal and cannot simultaneously consider defocus and contrast factors.

[0003] For example, lens designs based on multi-zone defocus (such as DIMS technology) only provide constant peripheral defocus stimulation for myopia prevention and control, which may not be sufficient to completely prevent axial elongation, and the effective rate of myopia prevention and control in clinical practice is 60%-65%; DOT lenses based on contrast reduction only reduce retinal imaging clarity through scattering and do not directly contribute to positive defocus signals, and the effective rate of myopia control can reach nearly 70% in the first year, but the data will rapidly decrease in the subsequent second and third years. Therefore, existing lenses lack a scheme that combines defocus design and contrast regulation, making it difficult to simultaneously target multiple driving factors of myopia progression. SUMMARY

[0004] The utility model provides a kind of lens and glasses of microlens combined speckle to form "double target" intervention mechanism to more effectively delay axial elongation in view of the lack of scheme that combines defocus design and contrast regulation in the prior art.

[0005] To achieve the above technical purposes, the technical solutions adopted by the present application are as follows:

[0006] In a first aspect, the utility model provides a kind of lens of microlens combined speckle, comprising: base lens, the base lens is divided into central region and peripheral region around the central region, the central region is equipped with optical area and speckle area one around the optical area, the speckle area one is equipped with a plurality of speckle structures one;The peripheral region is equipped with a plurality of layers of microlens annular array, a plurality of layers of the microlens annular array are arranged around the central region;In a plurality of layers of the microlens annular array, each layer of microlens annular array is formed by a plurality of groups of microlenses spaced arrangement, and each group of microlenses includes a plurality of microlens units.

[0007] Preferably, the optical zone is a circular area in the micro-lens annular array, and the diameter of the optical zone is greater than or equal to 4 mm, more preferably greater than or equal to 5 mm; and / or, the area occupied by all the micro-lens units in the micro-lens annular array is not less than 40%, more preferably not less than 50%.

[0008] Preferably, the peripheral area is further provided with a speckle area II, the speckle area II is arranged in the interval area of the micro-lens annular array, and the speckle area II is provided with a plurality of speckle structures II; further preferably, the speckle area II is arranged in the interval area of the micro-lens annular array and the peripheral area outside the micro-lens annular array.

[0009] Further preferably, the speckle structure I and the speckle structure II are circular concave or convex structures; more preferably, the diameter of the speckle structure I and the speckle structure II is 20-80 µm; and / or, more preferably, the distance between the speckle structure I and the speckle structure II and their adjacent speckle structures is 0.10-0.15 mm.

[0010] Preferably, each layer of the micro-lens annular array is arranged by 6-16 groups of micro-lens interval; more preferably, in each group of micro-lens, the adjacent micro-lens units are tangent.

[0011] Further preferably, each group of micro-lens is arranged by 2-10 micro-lens units.

[0012] Further preferably, the single micro-lens unit has a positive add power compared with the base lens; more preferably, the add power of the single micro-lens unit is controlled in the range of +2.50 D to +7.00 D, more preferably in the range of +3.50 D to +5.00 D.

[0013] Preferably, the surface of the single micro-lens unit is spherical, aspherical or free-form surface; and / or, the diameter of the single micro-lens unit is in the range of 0.5-1.5 mm, more preferably in the range of 0.8-1.2 mm.

[0014] Preferably, the size of the base lens is in the range of 50-90 mm, more preferably in the range of 60-80 mm; and / or, the planar profile of the central area and the peripheral area is circular, the diameter of the central area is in the range of 5-9 mm, more preferably in the range of 7-9 mm; the diameter of the peripheral area is in the range of 7-60 mm, more preferably in the range of 9-55 mm.

[0015] In the second aspect, the utility model provides a kind of glasses, including glasses frame and fixed on the lens as described in the first aspect of the glasses frame.

[0016] Compared with prior art, the utility model has the beneficial effects that:

[0017] The utility model discloses a micro-lens and speckle design are fused, wherein, the constant myopia defocus provided by micro-lens array can stimulate the peripheral retina to produce the feedback signal of inhibiting growth, and the speckle design is to reduce the overall contrast stimulation signal of retina imaging in the soft scattering mode, and this double path can produce the two effects of peripheral myopia defocus and retina contrast reduction simultaneously, thereby effectively delaying the axial growth through the double path. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view of the lens of the utility model.

[0019] Figure 2 It is the structure schematic diagram of the micro-lens annular array of the utility model.

[0020] Figure 3 It is the arrangement and add light degree mode of several layers of micro-lens annular array in the peripheral area of the lens of the utility model, wherein, red indicates that the add light degree is +3.5D, and blue indicates that the add light degree is +4.5D.

[0021] Figure 4 It is the partial enlarged view of the several layers of micro-lens annular array in the peripheral area of the lens of the utility model in conjunction with the speckle structure.

[0022] Figures 1-4 Wherein, 1-micro-lens, 2-base lens, 3-central area, 4-peripheral area, 5-micro-lens annular array, 6-single group micro-lens, 7-speckle structure, 8-optical zone, 9-speckle area one, 10-speckle area two. DETAILED DESCRIPTION

[0023] The utility model discloses the principle that the periphery of microlens is defocused and the principle that speckle reduces contrast are applied simultaneously, can produce the myopia control effect of cooperation. On the one hand, the periphery positive defocus signal provided by microlens is similar with traditional defocus lens, directly acts on the hypermetropia defocus feeling path of retina periphery, triggers " stop growing " signal. On the other hand, speckle structure makes the imaging light that enters the eye produce weak scattering, reduces image contrast from center to periphery, weakens the perception of retina especially periphery part to high contrast detail. The two kinds of effects stimulate different physiological pathways of eyeball: defocus mainly influences the negative feedback mechanism of eyeball diopter development, and contrast reduction can reduce the growth signal by affecting the ON / OFF path activity of retina. When the two are combined, the eye receives the double signals of " image slightly blurred " (low contrast) and " there is a focus in front " (myopia defocus) simultaneously. The multiple signal dynamic stimulation is expected to be more effective than single signal in deceiving the development regulation mechanism of eyeball, making it stop axial lengthening. In addition, as the microlens and speckle area act on different visual field areas (center / periphery) and different visual pathways respectively, the differential regulation of central and peripheral vision can be realized: the central visual field mainly undertakes clear imaging requirement, and still maintains good vision but slightly low contrast in the design; the peripheral visual field receives additional defocus blur stimulation. Such combination can be closer to the diversified visual stimulation mode in natural environment (for example, dynamic blur caused by blinking and depth of field change in outdoor environment), thereby producing a synergistic effect in delaying myopia.

[0024] In addition, in the embodiment of the utility model, the concept of add power is that, in the lens or glasses, the prescription power of the base lens optical area for looking far is taken as the reference, and the difference between the single microlens and the reference is the add power. For example, the refractive power of the base lens optical area is -3D, and the refractive power of a certain microlens is +4D, so the add power is +7D, that is, +4D - (-3D) = +7D.

[0025] Further, in the description of the utility model, it needs to be explained that, under the conditions not specified in the embodiment, the conventional conditions or the conditions recommended by the manufacturer are adopted. The reagents or instruments not specified by the manufacturer are all conventional products that can be purchased in the market.

[0026] The utility model will be further explained in detail in combination with the drawings and specific embodiments, which is the explanation of the utility model but not the limitation.

[0027] The utility model embodiment provides a kind of lens of microlens combined speckle, comprising: base lens, base lens is divided into central region and the periphery of central region, and central region is located in base lens center part;Preferably, the plane profile of central region and periphery is circular.

[0028] The utility model discloses a base lens is provided with 2 function areas, wherein, central region is equipped with optical area and surrounds optical area's speckle area no. 1, speckle area no. 1 is equipped with a plurality of speckle structure no. 1, makes the light that scatters into pupil with reduce retinal imaging contrast. The peripheral region is equipped with several layers of microlens annular array, namely convex lens annular array, several layers of microlens annular array are arranged around the central region. The combination of microlens and speckle can provide the wearer diopter correction at the same time with a part of optical fiber focus before the retina, thereby generating the peripheral defocus (myopic defocus) effect. The design utilizes the positive defocus produced by microlens to simulate hyperopic defocus stimulation, and simultaneously utilizes speckle structure to reduce the definition and contrast of peripheral retinal imaging. The two mechanisms complement each other to constitute "double target point" regulation: on the one hand, it provides continuous myopic defocus signal in different off-axis regions of the retina, and on the other hand, it comprehensively regulates the contrast of retinal imaging. Therefore, the eye accommodation growth signal caused by hyperopic defocus and high contrast imaging can be inhibited at the same time, and a more effective myopia control effect is achieved.

[0029] Further, in the several layers of the microlens annular array, each layer of the microlens annular array is arranged by a plurality of groups of microlenses. In some preferred cases of the embodiment, the area occupied by the arrangement of the microlenses in the several layers of the microlens annular array is not less than 40%, and more preferably not less than 50%. Each layer of the microlens annular array is arranged by 6-16 groups of microlenses; more preferably, in each group of microlenses, the adjacent microlenses are tangent. Such an optimized design not only creates a high-density distribution of microlenses in the clustered area, but also forms a low-density distribution in the spacing area. While maintaining a reasonable proportion of the overall microlens area, dynamic visual stimulation can be generated during eye movement, effectively controlling the progression of myopia.

[0030] Further, each group of microlenses comprises a plurality of microlens units, preferably 2-10 microlens units. For example, each group of microlenses comprises 2, 3, 4, 5, 6, 7, 8, 9, or 10 microlens units.

[0031] Further, the single microlens unit has a positive add power compared to the base lens; in some preferred cases of the embodiment, the add power of the single microlens unit is controlled within +2.50D to +7.00D, and more preferably +3.50D to +5.00D. Regarding the setting of the add power of each microlens unit, in some embodiments, the add power is allocated by a pseudo-random method, so that the microlens units at different positions have different add powers. For example, a binary algorithm is used to "color" each microlens unit by generating a pseudo-random sequence, with different colors representing different add powers, such as black representing an add of 3.5D and white representing an add of 4.5D (as shown in FIG. 2). Figure 2 The pseudo-random coloring method can produce different add power distributions.

[0032] Exemplarily, the surface of the single microlens unit is spherical, aspherical or free-form; the diameter of the single microlens unit ranges from 0.5 to 1.5 mm, preferably from 0.8 to 1.2 mm.

[0033] Exemplarily, the size of the base lens ranges from 50 to 90 mm, preferably from 60 to 80 mm; the diameter of the central region ranges from 5 to 9 mm, preferably from 7 to 9 mm; the diameter of the peripheral region ranges from 7 to 60 mm, preferably from 9 to 55 mm; the diameter of the optical zone is ≥ 4 mm, preferably ≥ 5 mm.

[0034] Further, the peripheral region is also provided with a speckle area two, and the speckle area two is arranged in the interval region of the plurality of layers of the microlens annular array; the speckle area two is also provided with a plurality of speckle structures two. In the preferred case of the utility model, the speckle area two is arranged in the interval region of the plurality of layers of the microlens annular array and the peripheral region outside the plurality of layers of the microlens annular array, and this distribution mode of the speckle has a better peripheral contrast reduction effect than the mode of being distributed only in the speckle area one and the speckle area one + interval region. The speckle can be designed as a regular shape, and preferably, the speckle structure one and the speckle structure two are both circular concave or convex structures. The diameter of the speckle structure one and the speckle structure two is 40-60 µm, which is much smaller than the limit of the resolution ability of the human eye, and the naked eye cannot directly perceive the existence of a single speckle. The arrangement of the speckle structure one and the speckle structure two in the respective region preferably adopts random or pseudo-random distribution, so as to avoid forming visible diffraction gratings or moire fringes, while keeping local statistical uniformity to ensure the consistency of the scattering effect of the entire region on the light.

[0035] In addition, the spacing between the speckle structure one and the speckle structure two and their adjacent speckle structures is 0.10-0.15 mm, so as to produce sufficient contrast reduction effect and not to disturb the vision, so that the fundus perceives a more "soft" image signal.

[0036] In one embodiment of the utility model, the basic parameters of the lens are as follows: the microlens diameter is 1.1 mm, the optical zone diameter is 5 mm, the central region diameter is 9 mm, the size range of 5-9 mm in the central region is the speckle area one, the peripheral region diameter is 40 mm, the area ratio of the microlens in the microlens annular array is 50%, and the speckle area two accounts for 50%. In the order from the center to the outside, the adjacent microlenses in the same group of microlenses of other rings are tangent except the first ring and the second ring.

[0037] The specific parameters of the microlens annular array are shown in Table 1.

[0038] The specific parameters of the speckle structure are as follows: both the speckle structure one and the speckle structure two are convex structures, the diameter is 50 µm, and the spacing between adjacent speckle structures is 0.15 mm. Compared with the existing products, the diameter of the optical zone of the lens in this specific case is smaller, and more effective treatment areas covering the peripheral retina 10-20° are formed. In addition, this non-continuous microlens distribution mode combined with the speckle layout forms a high density in the microlens cluster area and a low density in the interval area, which can produce dynamic visual stimulation during eye movement, rather than static, thereby more effectively controlling the progression of myopia.

[0039] Exemplarily, the preparation process of the microlens of the utility model roughly comprises the following steps, the whole process is the conventional technical means in the art, and the preparation process is not limited thereto:

[0040] (1) Microlens region manufacturing: The microlens array is usually arranged on the front surface of the lens, and can be prepared by processes such as mold forming or micro-nano machining. If batch production is selected, the required microlens array structure can be etched directly on the surface of the lens mold, and the lens is formed by one-time molding of optical resin by injection molding or compression molding, so that the microlens pattern and the lens substrate optical surface are integrated. This method is suitable for thermosetting / thermoplastic materials such as polycarbonate (PC) and high refractive index resin (such as MR series), and can realize accurate micron-level structure replication. If higher precision or prototype development is required, micro-nano optical machining techniques such as ultra-precision turning (UP turning) or femtosecond laser direct writing can be used to engrave lens arrays on the lens curved surface. For materials with high hardness and thermal stability (such as Trivex resin), mold direct forming may be more economical; for the case of secondary processing of microstructures on finished lenses, ultrafast laser processing or micron CNC engraving can provide the required flexibility and precision.

[0041] (2) Speckle structure manufacturing: The formation of the speckle structure can be directly processed on the lens by femtosecond laser micro-machining technology. Laser lithography process can also be used for processing on the mold.

[0042] In actual mass production, photolithography / inkjet printing processes can also be considered to generate speckle structures in batches: for example, using precision inkjet printing to deposit small transparent dots on the lens surface and UV curing to form scattering protrusions (WO2018026697A1). Regardless of the process used, it is necessary to ensure that the speckle size is accurate, the distribution is uniform, and it is strictly separated from the microlens region, so as to ensure that the optical performance meets the design requirements.

[0043] Further, regarding the lens material selection: conventional optical resin materials such as polycarbonate (PC), Trivex or MR-series high refractive index resins can be selected as the base lens material. PC materials are strong in impact resistance and easy to injection mold, and have been widely used in myopia control lenses for children, such as the PC material with a refractive index of 1.59 used by MiyOSMART (Overview on Defocus Incorporated Multiple Segments Lenses), which is very suitable for the mold pressing and femtosecond laser processing of the microlenses in the present utility model. Trivex materials have advantages such as high impact resistance and low density, and their optical stability when processing speckles helps to obtain uniform scattering points. MR-series resins (such as MR-7, MR-8, with a refractive index of 1.6-1.74) have both high refractive index and good optical transparency, and can be used to manufacture thinner myopia lenses, which can also form microstructures or laser-processed speckles through custom molds. Before mass production, process tests should be conducted according to the selected material to ensure that the microlens array and speckle structure are dimensionally stable and firmly attached during material forming and post-processing, and do not affect the mechanical and optical quality (such as transmittance, fatigue strength, etc.) of the lens.

[0044] The imaging principle and optical effect of the lens are as follows:

[0045] The present utility model introduces a microlens array in a specific area of the lens and combines it with a laser-processed micro-speckle structure, thereby forming a myopia control lens that simultaneously acts on the retinal imaging location and imaging contrast.

[0046] Specifically, the lens optical zone is divided into two functional areas: the central area has a micrometer-scale speckle array that scatters the light entering the pupil to reduce the retinal imaging contrast; and the peripheral annular area is provided with a plurality of microlenses (convex lenslets) that are mixed with the speckle array, providing the wearer with refractive correction while focusing part of the light before the retina, thereby producing a peripheral defocus (myopic defocus) effect. This design uses the positive defocus produced by the microlenses to simulate hyperopic defocus stimulation, while the speckle structure reduces the definition and contrast of the peripheral retinal imaging. The two mechanisms complement each other and constitute a "double target" regulation: on the one hand, it provides a sustained myopic defocus signal in different off-axis areas of the retina, and on the other hand, it comprehensively regulates the retinal imaging contrast. As a result, it is expected to simultaneously suppress the ocular accommodation growth signals caused by hyperopic defocus and high-contrast imaging, achieving a more effective myopia control effect.

[0047] Further, the present utility model embodiment also provides a pair of glasses, comprising a glasses frame and a lens fixed on the glasses frame. The glasses provided by the present utility model embodiment have the corresponding beneficial effects of the lens provided by the present utility model embodiment, which will not be described here.

[0048] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A microlens combined speckle lens, characterized by, The lens comprises a base lens, the base lens is divided into a central region and a peripheral region surrounding the central region, the central region is provided with an optical zone and a speckle zone I surrounding the optical zone, the speckle zone I is provided with a plurality of speckle structures I; the peripheral region is provided with a plurality of layers of annular micro-lens arrays, a plurality of layers of the annular micro-lens arrays are arranged around the central region; in a plurality of layers of the annular micro-lens arrays, each layer of the annular micro-lens array is formed by a plurality of groups of micro-lenses arranged at intervals, and each group of micro-lenses comprises a plurality of micro-lens units.

2. The lens of claim 1, wherein, In a plurality of layers of the annular micro-lens arrays, the optical zone is a circular region, and the diameter of the optical zone is greater than or equal to 4 mm; and / or, the area occupied by all the micro-lens units arranged in a plurality of layers of the annular micro-lens arrays is not less than 40%.

3. The lens of claim 2, wherein, In a plurality of layers of the annular micro-lens arrays, the diameter of the optical zone is greater than or equal to 5 mm.

4. The lens of claim 2, wherein, The area occupied by all the micro-lens units arranged in a plurality of layers of the annular micro-lens arrays is not less than 50%.

5. The lens of any one of claims 2 to 4, wherein, The peripheral region is further provided with a speckle zone II, the speckle zone II is arranged at least in the interval region of a plurality of layers of the annular micro-lens arrays, and the speckle zone II is provided with a plurality of speckle structures II.

6. The lens of claim 5, wherein, The speckle zone II is arranged in the interval region of a plurality of layers of the annular micro-lens arrays and the peripheral region outside a plurality of layers of the annular micro-lens arrays.

7. The lens of claim 5, wherein, The speckle structure I and the speckle structure II are both circular concave or convex structures.

8. The lens of claim 7, wherein, The diameter of the speckle structure I and the speckle structure II is 20-80 µm.

9. The lens of claim 7 or 8, wherein, The spacing between the speckle structure I and the speckle structure II and their adjacent speckle structures is 0.10-0.15 mm.

10. The lens of claim 1, wherein, Each layer of the annular micro-lens array is formed by 6-16 groups of micro-lenses arranged at intervals.

11. The lens of claim 10, wherein, In each group of micro-lenses, adjacent micro-lens units are tangent.

12. The lens of claim 10 or 11, wherein, Each group of micro-lenses is arranged by 2-10 micro-lens units.

13. The lens of claim 12, wherein, A single micro-lens unit has a positive add power compared with the base lens.

14. The lens of claim 13, wherein, The add power of a single micro-lens unit is controlled to be +2.50 D to +7.00 D.

15. The lens of claim 14, wherein, The add power of a single micro-lens unit is controlled to be +3.50 D to +5.00 D.

16. The lens of claim 12, wherein, The surface of a single micro-lens unit is a spherical surface, an aspherical surface or a free-form surface; and / or, the diameter of a single micro-lens unit ranges from 0.5 mm to 1.5 mm.

17. The lens of claim 16, wherein, The diameter of a single micro-lens unit ranges from 0.8 mm to 1.2 mm.

18. The lens of claim 1, wherein, The size of the base lens ranges from 50 mm to 90 mm; and / or, the planar profiles of the central region and the peripheral region are both circular, the diameter of the central region ranges from 5 mm to 9 mm, and the diameter of the peripheral region ranges from 7 mm to 60 mm.

19. The lens of claim 18, wherein, The size of the base lens ranges from 60 mm to 80 mm.

20. The lens of claim 18, wherein, The diameter of the central region ranges from 7 mm to 9 mm.

21. The lens of claim 18, wherein, The diameter of the peripheral region ranges from 9 mm to 55 mm.

22. Eyeglasses, characterized in that The lens comprises a spectacle frame and a lens as claimed in any one of claims 1-21 fixed to the spectacle frame.

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