A progressive lens and eyeglasses

Abstract

The application discloses a kind of progressive lenses and glasses, wherein the progressive lenses include: lens body, and microlens region is located on lens body, and microlens in microlens region is arranged in close-packed manner on lens body;Wherein, microlens region is at least arranged in astigmatic region of progressive lenses, and in first direction, the refractive power of each microlens in astigmatic region gradually increases, and the first direction is the direction from the far use area of progressive lenses to the near use area.Due to the surface of lens body is provided with a large number of close-packed microlens, each microlens can bear a part of refractive power change respectively, and originally large-scale aberration can be dispersed into multiple small-scale aberration accumulation. Dispersed aberration can avoid the impact of large-scale continuous distortion on vision, and reduce the visual discomfort brought by large-scale distortion to wearer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, and in particular to a progressive lens and glasses. BACKGROUND

[0002] Progressive addition lenses (PAL lenses) provide multi-distance vision correction for presbyopic patients by realizing continuous change from far vision power to near vision power on the same lens. However, while realizing the power gradient, PAL lenses inevitably introduce large aberrations and distortions in the periphery of the lens, especially prism inequality and astigmatism in the horizontal meridian direction. Such distortions in the peripheral field of view can cause the image in the field of view to move or distort relatively when the wearer rotates the eyes or shakes the head, which is called the "swim effect". The swim effect can make the wearer feel that the vision is shaking and unstable, and in severe cases, it can cause dizziness and discomfort, reducing the adaptability of the progressive lens.

[0003] In order to reduce the swim effect, traditional PAL lens designs have adopted various optimization methods. For example, free-form surface optimization technology balances the optical performance of each viewing zone by precisely controlling the curvature of each point on the lens surface, trying to maximize the clear field of view and reduce peripheral aberrations. For example, the partition optical design adopts different optical design strategies in different regions of the lens, and divides the far vision area, the transition channel and the near vision area into functions to optimize the imaging effect of each region. These methods alleviate the distortion problem to some extent, but still have limitations. Due to the inherent constraints of the continuous surface of the progressive lens, it is a pair of mutually balanced targets to simultaneously obtain a wide far vision field, a smooth power transition and low aberrations. Therefore, even after optimization, the traditional PAL lens still has some degree of distortion in the peripheral region, and the swim effect is difficult to be completely eliminated. SUMMARY

[0004] The present application provides a progressive lens and glasses to solve the discomfort of the wearer caused by the swim effect when wearing the progressive lens in the related art.

[0005] According to an aspect of the present application, a progressive lens is provided, comprising: a lens body, and a microlens region on the lens body, microlenses in the microlens region being arranged on the lens body in a dense manner.

[0006] The microlens region is arranged at least in an astigmatism region of the progressive lens, and in a first direction, the refractive power of each microlens in the astigmatism region gradually increases, the first direction being a direction from a far vision region to a near vision region of the progressive lens.

[0007] Optionally, each microlens is arranged in a regular dense manner or in a random distribution dense manner.

[0008] Optionally, when the microlenses are arranged in a regular dense arrangement, the shape of each microlens comprises a polygon and / or a curved polygon, and each microlens is arranged periodically.

[0009] Optionally, when the microlenses are arranged in a random dense arrangement, the shape of each microlens comprises an irregular polygon and / or a free curve, and each microlens is not arranged periodically.

[0010] Optionally, the adjacent microlenses are smoothly connected by a continuous optical surface.

[0011] Optionally, the transition surface between the microlenses is generated by a NURBS surface modeling method.

[0012] Optionally, each microlens in the microlens region and the lens body can form the progressive lens based on the principle of Fresnel lens.

[0013] Optionally, the microlens region is also arranged in the distance region, the near region and the channel region, the refractive power of each microlens in the distance region is consistent, and the refractive power of each microlens in the near region is consistent.

[0014] In the first direction, the refractive power of the microlenses in the distance region is less than the refractive power of the microlenses in the near region, and the refractive power of each microlens in the channel region gradually increases.

[0015] Optionally, the microlenses in the astigmatic region and the channel region are arranged in a random dense arrangement, and the microlenses in the distance region and the near region are arranged in a regular dense arrangement.

[0016] Alternatively, the microlenses in the astigmatic region are arranged in a random dense arrangement, and the microlenses in the distance region, the near region and the channel region are arranged in a regular dense arrangement.

[0017] Optionally, the size of the microlenses in the astigmatic region is smaller than the size of the microlenses in other regions except the astigmatic region.

[0018] According to another aspect of the present application, an eyeglass is provided, characterized in that it comprises the progressive lens according to any one of the embodiments of the present application.

[0019] The technical scheme of the embodiment of the present application is that the microlenses are arranged in a densely packed manner on the lens body of the progressive lens to form a microlens region, and the microlens region is arranged at least in the astigmatic region of the progressive lens, in a first direction, the refractive power of each microlens in the astigmatic region gradually increases, and the first direction is the direction from the distance use region to the near use region of the progressive lens. Since a large number of densely packed microlenses are arranged on the surface of the lens body, each microlens can bear a part of the refractive power change, and the originally large-scale aberration can be dispersed into multiple small-scale aberration accumulations. The dispersed aberration can avoid the impact of large-scale continuous distortion on vision. Furthermore, the microlenses are densely packed on the surface of the lens body, and the refractive power gradually changes, so that the refractive power gradient process of the lens body can be subdivided into multiple micro segments, the optical performance can be finely controlled, and the visual discomfort of the wearer caused by large-scale distortion can be reduced.

[0020] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a structural schematic diagram of a progressive lens provided according to an embodiment of the present application;

[0023] Figure 2 is a smooth transition schematic diagram in a progressive lens according to an embodiment of the present application;

[0024] Figure 3 is a structural schematic diagram of a progressive lens according to an embodiment of the present application;

[0025] Figure 4 is a distribution schematic diagram of the optical refractive power of the microlenses in the progressive lens according to an embodiment of the present application;

[0026] Figure 5 is a distribution schematic diagram of the microlenses arranged in an irregularly dense manner on the progressive lens in an embodiment of the present application;

[0027] Figure 6 is Figure 5 a schematic diagram of the sag of each microlens in DETAILED DESCRIPTION

[0028] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the protection scope of the present application.

[0029] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a list of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such processes, methods, products or devices.

[0030] The root cause of the swimming effect in the related art is that the luminosity distribution of the PAL lens needs to complete the transition from far to near in a limited area, which inevitably produces peripheral prism effect and aberration in optics. This low-frequency, large-scale distortion produces strong light flow disturbance in dynamic vision, causing the brain to interpret it as environmental movement (i.e. producing the "swimming" illusion). In the present application, the microlenses are densely laid on the lens, and the refractive power of the microlenses is gradually changed, so that the originally large-scale aberration is dispersed into multiple small-scale aberrations, thereby avoiding the impact of large-scale continuous distortion on vision and reducing the swimming effect.

[0031] Figure 1 is a structural schematic diagram of a progressive lens provided according to an embodiment of the present application. As shown in Figure 1 the progressive lens includes a lens body 100 and a microlens region 101 on the lens body 100, and the microlenses in the microlens region 101 are densely arranged on the lens body 100.

[0032] The microlens region 101 is arranged at least in a stigmation region 102 of the progressive lens, and the refractive power of each microlens in the stigmation region 102 gradually increases in a first direction x, and the first direction x is a direction from a far use region 103 to a near use region 104 of the progressive lens.

[0033] It should be noted that, as Figure 1As shown, the lens body 100 of the progressive lens generally comprises a distance vision area 103, a passage area 105, and a near vision area 104, and on both sides of the passage area 105, astigmatic areas 102 are easily formed. Among them, the passage area 105 is also called the transition area between the distance vision area 103 and the near vision area 104. On both sides of the passage area 105, astigmatic areas 102 are easily formed. When the wearer wants to look far away, the distance vision area 103 is used, and when the wearer wants to look at the near object, the near vision area 104 is used, so that the same lens can realize the vision correction of far and near distance at the same time. However, when the wearer frequently switches between the distance vision area 103 and the near vision area 104, or shakes the head left and right, due to the change of lens power and the aberration generated by the astigmatic area 102, the wearer will feel that the peripheral scene appears to be shaking and dizzy. The embodiment of the present application can reduce the surge effect by densely arranging the microlenses and gradually changing the refractive power.

[0034] It can be understood that the microlenses are arranged on the lens body 100 in a densely arranged manner, that is, the microlenses are arranged in a closely adjacent manner, the edges of the microlenses are connected to each other without gaps, and the surface of the lens body 100 is a continuous microlens splicing structure without exposed areas of the base lens. This densely arranged manner can ensure the uniformity of the optical effect and avoid imaging discontinuity or visual interference caused by gaps between the microlenses.

[0035] It should be noted that the microlenses can be densely arranged on the lens body 100 in the astigmatic area 102 with the largest aberration to solve the surge effect caused by the astigmatic area 102. Among them, in the first direction x, the refractive power of each microlens is gradually increased, so that the microlens array as a whole forms the required progressive refractive power distribution. The aberration of the astigmatic area 102 is dispersed by the arrangement of the microlenses. In one embodiment, the microlenses in the astigmatic area 102 can be aspherical lenses, wherein the aspherical design allows the aberration to be controlled by adjusting the curvature gradient, and has higher freedom than the simple spherical design. For example, a microlens can be designed as an aspherical lens with a gradually changing curvature on the front surface to correct the spherical aberration and coma of the focused light rays in this unit at the same time, thereby improving the imaging quality. When a plurality of such optimized microlenses are spliced together, the overall aberration of the lens is minimized. Thus, the spherical aberration, astigmatism and other high-order aberrations are further corrected, and the imaging quality is further optimized. Therefore, by adjusting the microlenses, it is possible to avoid the occurrence of a large range of continuous high astigmatic area.

[0036] Further, each microlens is endowed with a specific refractive parameter according to its position on the lens coordinate, so that the entire array collectively constitutes a required optical power map (i.e. a power distribution gradually increasing from top to bottom). Through optimization calculation, the refractive power difference between units can be minimized to reduce the impact on vision, and the wearer perceives a continuous and smooth power transition rather than a discrete image jump by taking advantage of the human eye's fusion ability to small visual area changes.

[0037] In some embodiments, the microlens region 101 can be arranged in other regions of the lens body 100 in addition to the astigmatic region 102 according to actual conditions. Figure 1 The microlens region 101 marked in the figure is only an example. In practice, the boundary of the microlens region 101 can coincide with the edge of the region of the lens body 100 where microlenses are needed to be laid.

[0038] Optionally, the microlenses are arranged in a regular dense manner or in a random distribution dense manner.

[0039] It should be noted that regular dense arrangement, for example, uses equi-sized regular geometric units (such as triangles, rectangles, pentagons, hexagons, etc.) to arrange periodically on the lens surface; while random distribution refers to random changes in size, shape and arrangement of microlens units without fixed periodic structure. Different arrangement methods will result in different optical scattering characteristics, which can be selected according to the need to alleviate distortion (the distortion situation can be back calculated through optical simulation software to determine the corresponding arrangement method).

[0040] In the regular dense arrangement, each microlens is laid according to a predetermined geometric pattern. For example, the surface of the lens body 100 can be approximately flattened and divided into equi-sized hexagonal honeycomb units, each hexagonal region corresponding to a microlens. This hexagonal dense arrangement can seamlessly fill the entire plane with the same shape, thereby uniformly covering the lens surface. Similarly, regular triangle or regular rectangle basic units can also be used for arrangement. If regular arrangement is needed on a curved surface, the unit shape can be appropriately changed or pentagonal and hexagonal units can be mixed (similar to the pentagonal-hexagonal tessellation of a football surface) to fit the non-planar lens curvature. Regular dense arrangement makes the structure orderly and controllable, facilitating design and processing, and the variation of microlens parameters has regularity, which can simplify computer modeling and numerical control processing.

[0041] In the irregular random distribution tiling method, the size, shape and position of the microlenses can be generated in a random or quasi-random manner. For example, the microlenses on the surface of the lens body 100 can have different diameters and curvatures, present irregular polygonal or circular contours, and be spliced together but not periodically repeated. The purpose of random distribution is to scatter optical artifacts and avoid binocular perception abnormalities that may be caused by regular patterns. At the same time, the random microstructure can more evenly disperse the residual aberration, so that when the eye moves, the aberration changes in each direction are more smooth and do not present obvious periodic distortion. Although this method is more complex in design and analysis, it is expected to further reduce the wearer's awareness of the array structure and improve visual comfort.

[0042] Optionally, when the microlenses are arranged in a regular tiling manner, the shape of each microlens includes a polygon and / or a curved polygon, and each microlens is arranged in a periodic repetition.

[0043] The polygon can be a regular hexagon, a regular pentagon, a regular triangle, etc., and the curved polygon can be a closed figure formed by a combination of curved segments such as circular arcs, elliptical arcs, parabolic arcs, etc., and straight line segments, such as curved triangles, curved quadrilaterals, etc. These shapes are beneficial for close fitting. In some embodiments, tiling can be performed only by polygons, or only by curved polygons, or by a combination of polygons and curved polygons. The mirror surface is as gapless as possible.

[0044] For example, when only polygons are used for tiling, a hexagon can seamlessly tile a plane like a honeycomb due to its internal angle sum of 120 degrees, has the smallest adjacent gap, has a higher filling rate, and has six-fold rotational symmetry, with six adjacent lenses evenly distributed around each microlens, so that the propagation path of light in each direction is more balanced, avoiding optical distortion or energy distribution deviation caused by uneven arrangement. In addition, the distance from the center of the hexagon to each vertex is equal, the incident angle distribution of light passing through the microlens is more uniform, and aberrations such as spherical aberration and coma can be reduced. Furthermore, when tiling regularly, the edges of each region on the lens body 100 can also be arranged into microlenses, reducing the gap at the edges of each region and avoiding new aberrations caused by each gap.

[0045] When only curved polygons are used for tiling, curved triangles or curved quadrilaterals can achieve close fitting. The curved edges (such as circular arcs) of the curved triangle make the boundary of the spliced pattern smooth, avoiding the sharp corners of traditional straight-line triangles, and providing a visually softer and seamless splicing effect.

[0046] In addition, when the polygons are mixed and densely arranged with curved polygons, the curved polygons can compensate for the gaps formed by the polygons, so that the micro-lenses are more closely arranged, such as the mixed arrangement of regular hexagons and curved hexagons, the mixed arrangement of squares and curved squares, and the like, and smooth transitions can be achieved at the edges of the micro-lenses.

[0047] In the regular dense arrangement, the structure is orderly and controllable, which facilitates design and processing, the parameters of the micro-lenses change regularly, and the computer modeling and numerical control processing can be simplified.

[0048] Optionally, when the micro-lenses are arranged in a random dense arrangement, the shapes of the micro-lenses include irregular polygons and / or free curved lines, and the micro-lenses are not arranged periodically.

[0049] In the irregular shape, each unit has a different boundary profile, such as an irregular polygon or a free curved boundary, which is generated by a computer algorithm, so that the entire array is randomly embedded like a jigsaw puzzle. Whether to choose a certain shape needs to consider the filling efficiency (i.e., whether it can seamlessly cover a curved surface), the feasibility of processing, and the optical effect. The regular shape design is relatively simple and easy to parameterize and control, but it may introduce periodic patterns in certain directions; the irregular shape design can break the periodic structure, but a complex optimization algorithm is needed to ensure that each unit is tightly spliced and the optical performance meets the requirements. Random microstructures can more evenly disperse residual aberrations, so that when the eye moves, the aberration changes in each direction are more smooth and do not show obvious periodic distortion.

[0050] Optionally, Figure 2 is a schematic diagram of smooth transition in a progressive lens according to an embodiment of the present application; as Figure 2 illustred, the adjacent micro-lenses are smoothly transitioned through continuous optical curves.

[0051] It should be noted that whether it is regular dense arrangement or irregular dense arrangement, the adjacent micro-lenses are smoothly transitioned through continuous optical curves. That is, at the junction of adjacent micro-lenses, the surfaces of the two units are gradually transitioned and merged through mathematical methods, instead of simply intersecting with each other (which will form an edge line or a step).

[0052] After such processing, even if the micro-lens array is designed to be composed of many micro-lenses, the actual lens surface manufactured will present a seamless and continuous curvature change. For the wearer, there will be no boundary line or step structure perceived on the lens, and the lens is visually equivalent to a continuous optical surface. The smooth curve transition can also avoid scattering of light or sudden changes in aberration at the unit boundary, ensuring the stability of the image when the line of sight sweeps through the units.

[0053] Understandably, since the refractive power of adjacent microlenses is not exactly the same, their edge sagitta will also have some differences. When smoothing is performed, a relatively steep gradient will be produced at the edge of the microlens. In this way, even though the edge of the microlens may introduce astigmatism, because the edge of the microlens is diffuse, this astigmatism will not produce a continuous visual distortion perception and will therefore be ignored by the human eye.

[0054] by Figure 2 Taking the hexagonal regular tessellation as an example, the edges between adjacent microlenses have steps, which can be smoothed to allow for a smooth transition between adjacent microlenses. Although the smooth transition area may result in extremely high astigmatism, this astigmatism does not produce continuous visual distortion perception and is therefore ignored by the human eye.

[0055] Optionally, transition surfaces are generated between the microlenses using the NURBS surface modeling method.

[0056] To avoid optical abrupt changes or mechanical seams between microlenses, a continuous optical surface transition method is required. This means that at the boundaries of adjacent microlenses, a smooth transition of curvature is achieved using methods such as NURBS (Non-Uniform Rational B-Splines) surface modeling. This ensures that although the entire lens surface is composed of numerous small units, it remains a smooth and continuous surface macroscopically, so the wearer will not perceive the existence of unit boundaries, thus avoiding scattering or abrupt aberrations.

[0057] The NURBS surface modeling method can be used to generate smooth transition surfaces for continuous optical surfaces. Specifically, given the curvature conditions of adjacent regions, control points and weights are set to ensure that the surface of the transition zone simultaneously satisfies the boundary conditions of the microlenses on both sides, achieving a smooth connection.

[0058] The NURBS surface is defined by two parameters (u, v), and its expression is:

[0059] ,in, For the coordinates of the control points, The weights of the corresponding control points, : respectively Second-rate Spline basis functions. Among them, Spline basis functions are piecewise polynomial functions defined by nodal vectors that determine the shape of a surface within a parameter range. This represents the number of control point grids in the space. u and v are the curvature conditions of adjacent regions.

[0060] Optionally, each microlens in the microlens region 101 and the lens body 100 can form a progressive lens based on the Fresnel lens principle.

[0061] Understandably, each microlens and the lens body 100 can form a progressive lens based on the Fresnel lens principle. This arrangement allows for a reduction in the thickness of the progressive lens, thereby reducing its weight and improving wearer satisfaction.

[0062] Optionally, Figure 3 This is a schematic diagram of the structure of a progressive lens according to an embodiment of the present invention. Figure 4 This is a schematic diagram illustrating the distribution of optical refractive power of the microlens in the progressive lens according to an embodiment of the present invention, showing how it varies with position. Figure 3 and Figure 4 As shown, the microlens region 101 is also disposed in the distance region 103, the near region 104 and the channel region 105. The refractive power of each microlens in the distance region 103 is the same, and the refractive power of each microlens in the near region 104 is the same. In the first direction x, the refractive power of the microlens in the distance region 103 is less than that of the microlens in the near region 104, and the refractive power of each microlens in the channel region 105 gradually increases.

[0063] The microlens region 101 can be located only in the astigmatic region 102, or in the astigmatic region 102 and the channel region 105, or in the astigmatic region 102, the distance viewing region 103, the near viewing region 104, and the channel region 105. Whether a microlens is laid on a certain area of ​​the lens body 100 depends on the degree of astigmatism in that area. The greater the degree of astigmatism, the more necessary it is to lay microlenses, and vice versa. In this embodiment, microlenses are laid on the entire lens body 100.

[0064] It is understood that when laying out microlenses, each microlens possesses its own optical refractive power, including spherical power (focal power) or a combination of spherical power (focal power) and cylindrical power (astigmatism correction). In this embodiment of the invention, the microlens array as a whole will provide the same far-intermediate-near progressive power function as progressive lenses, but this function is achieved collaboratively by numerous discrete microlenses. Therefore, it is necessary to optimize the refractive parameters of the microlenses zone by zone according to the visual area of ​​the lens and the medical prescription (e.g., the prescription power).

[0065] In the microlens area corresponding to the distance vision zone, the primary refractive power should be provided for distance vision. The spherical power should be close to the wearer's distance prescription, and the cylindrical power (if applicable) should be set according to the prescription axis. The microlenses in this area may be designed to be relatively flat to provide a larger field of view. In the distance vision zone, the refractive power of the microlenses is very close to that of the base lens, and in some areas, they may overlap with the surface of the base lens.

[0066] The microlenses distributed along the gradual transition channel (intermediate transition zone) gradually transition in spherical power, increasing the add power to meet the needs of the intermediate distance vision, and the cylindrical power can be adjusted step by step to control the astigmatism distribution, or can be completely free of cylindrical power. The parameters of the microlenses need to be finely graded to ensure smooth transition of the refractive power from the distance zone to the near zone, and the user will not feel the abrupt jump in power when moving the line of sight between different units.

[0067] In the microlens region corresponding to the near zone, the unit provides a higher refractive power required by the wearer for reading distance. The spherical power of the microlens here reaches the near use value of the prescription, and the cylindrical power is corrected as needed, or can be completely free of cylindrical power. The near zone requires a higher field of view width due to the short viewing distance, and the effective aperture of the microlens unit can be appropriately increased or the aberration can be reduced.

[0068] For example, as shown in Figure 3 , the microlens region 101 in the figure is only an example and is not limited to the area drawn in Figure 3 . The equivalent power distribution of the lens surface at each position is shown in the form of a color map in Figure 4 . As can be seen from Figure 4 , from the upper distance zone to the lower near zone of the lens body, the refractive power gradually increases; at the same time, the refractive power change gradient of the peripheral region is refined to a local small change, and then the overall power gradient is refined to the power gradient of multiple small regions through the microlens array design.

[0069] Optionally, the microlenses in the astigmatism region 102 and the channel region 105 are arranged in a random distribution and dense packing manner, and the microlenses in the distance region 103 and the near region 104 are arranged in a regular dense packing manner; or the microlenses in the astigmatism region 102 are arranged in a random distribution and dense packing manner, and the microlenses in the distance region 103, the near region 104 and the channel region 105 are arranged in a regular dense packing manner.

[0070] It should be noted that due to the serious astigmatism of the astigmatism region 102, the microlenses can be arranged in a random distribution and dense packing manner to further reduce the wearer's awareness of the array structure, more evenly disperse the remaining aberration, and make the aberration change in each direction more smooth when the eye moves, without obvious periodic distortion. Similarly, in the channel region 105, the astigmatism is less serious, and the microlenses can also be arranged in a random distribution and dense packing manner.

[0071] Alternatively, the microlenses in the distance region 103, the near region 104 and the channel region 105 are arranged in a regular dense packing manner. In this way, the computer modeling and numerical control processing can be simplified.

[0072] Optionally, the size of the microlenses in the astigmatism region 102 is smaller than the size of the microlenses in other regions except the astigmatism region 102.

[0073] It can be understood that, due to the serious astigmatism of the astigmatism area 102, the size of each microlens in the astigmatism area 102 can be made smaller to generate a higher frequency of distortion signals, thereby further masking the large-scale astigmatism signal of the original astigmatism area 102, so that the wearer ignores the large-scale astigmatism signal when wearing the glasses.

[0074] wherein, Figure 5 is a distribution diagram of irregularly dense arrangement on the progressive lens in the embodiment of the application. Figure 6 is Figure 5 is a sag diagram of each microlens in the embodiment of the application. Figure 5 As shown, in the irregularly dense arrangement, different colors represent different microlenses, and there are irregular heptagons, hexagons, pentagons, quadrilaterals, etc. In this way, the large-scale astigmatism signal of the original astigmatism area 102 can be further masked.

[0075] To realize the above-mentioned microlens array progressive lens design, a precise manufacturing process is needed to process the complex free-form surface structure. The following are several feasible manufacturing approaches:

[0076] Free-form surface numerical control machining uses high-speed and high-precision numerical control machine tools or turning equipment to directly process the complex curved surface profile of the microlens array on the lens blank surface. Modern five-axis CNC grinding / turning machines and free-form surface lathes can achieve nanometer-level precision, so that the curvature of each microlens unit is strictly generated according to the design. This method is suitable for the production of customized single-piece lenses.

[0077] Ultra-precision turning uses a single-point diamond tool for ultra-precision turning to process a microlens array surface of optical quality. By controlling the tool path, the required microlens array topography can be turned on the substrate, and the surface roughness can reach the nanometer level to ensure the optical performance. This method is particularly suitable for processing microlens arrays or molds with smaller diameters.

[0078] Mold forming first makes a mold of the microlens array structure through micro-machining technology, and then uses molding processes such as injection molding and compression molding to mass-produce lenses. For example, a metal mold cavity is made by ultra-precision machining, which has the required negative microlens array, and then optical-grade resin or glass is molded and solidified in the mold to obtain a microlens array lens complementary to the shape of the mold. This method is suitable for mass production of lens products with high consistency.

[0079] Nanoimprint, using lithography and etching technology to make a microlens array template on the substrate, and then using nanoimprint method to transfer the micro-nano structure to the surface of the optical lens material. Nanoimprint has the characteristics of high resolution and high replication, and can imprint a complete microlens array on a large area of lens at one time. This technology is expected to improve production efficiency and can process sub-micron precision complex structures.

[0080] Through the above process or its combination, the micro-lens array progressive lens required by the embodiment of the application can be manufactured. In the manufacturing process, special attention needs to be paid to the connection accuracy of the micro-lens edge and the surface finish, so as to ensure the realization of smooth transition design and optical quality.

[0081] According to another aspect of the application, an eyeglass is provided, characterized in that it comprises the progressive lens of any embodiment of the application.

[0082] The eyeglass according to the embodiment of the application can have the same beneficial effects as the progressive lens. The micro-lens array progressive lens design according to the application significantly improves the dynamic visual field stability of the wearer in terms of technical effects. First, since the large-scale distortion is dispersed to numerous small-scale micro-lenses, when the wearer rotates the eyes or the head, the aberration change of each field region is more subtle and smooth, and the surge effect is significantly reduced. Compared with the progressive lens in the related art, when the wearer quickly looks in different directions, the objects in the visual field no longer distort or shake dramatically as in the past, but remain relatively stable. Experimental and simulation results show that the micro-lens array can weaken the astigmatism gradient in the peripheral visual field, thereby minimizing the dynamic distortion during movement.

[0083] Secondly, the progressive lens according to the embodiment of the application improves the wearing comfort and adaptability. Since the feeling of visual shaking is reduced, new wearers are more easily adapted to the imaging characteristics of the progressive lens, and the discomfort during the transition period is reduced. At the same time, the fine design of the micro-lens ensures the clarity of the far and near use areas is not damaged, and even due to the more uniform distribution of distortion, the wearer may feel a wider effective visual field. This is particularly advantageous for people who often need to use progressive glasses when moving or walking (such as old people going up and down stairs, drivers looking at the rearview mirror by turning their heads, etc.), who will experience a more stable visual field.

[0084] In addition, by reasonable parameter design, the microlens array lens can reduce distortion while maintaining the optical performance required by the prescription, without affecting the vision correction effect. Each microlens unit accurately provides the required diopter, ensuring clear vision at far, medium and near distances. In addition, the smooth transition structure still makes the lens smooth in appearance, ensuring that the appearance is beautiful and easy to clean, and there is no problem of dirt accumulation caused by complex structure. In summary, the progressive lens using the scheme of the present application has a qualitative leap in dynamic visual experience, solves the problem of surge effect that has long plagued wearers, and has significant practical value and market prospects.

[0085] In summary, the technical scheme of the embodiment of the present application sets the microlenses in a densely packed manner on the lens body of the progressive lens to form a microlens region, and the microlens region is at least arranged in the astigmatic region of the progressive lens. In the first direction, the diopter of each microlens in the astigmatic region gradually increases, and the first direction is the direction from the distance use region to the near use region of the progressive lens. Since a large number of densely packed microlenses are arranged on the surface of the lens body, each microlens can bear a part of the diopter change, and the originally large-scale aberration can be dispersed into multiple small-scale aberrations. The dispersed aberration can avoid the impact of large-scale continuous distortion on vision. Furthermore, densely packing microlenses on the surface of the lens body and gradually changing the diopter can subdivide the diopter gradient process of the lens body into multiple microsegments, realize fine control of optical performance, and reduce the visual discomfort caused by large-scale distortion to the wearer.

[0086] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical scheme of the present application can be achieved, which is not limited herein.

[0087] The above specific embodiments do not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A progressive lens, characterized in that, The progressive lens comprises: a lens body, and a microlens region on the lens body, microlenses in the microlens region being densely arranged on the lens body; wherein the microlens region is provided at least in a stigmation region of the progressive lens, in a first direction, the refractive power of each microlens in the stigmation region gradually increases, the first direction being a direction from a distance vision region to a near vision region of the progressive lens; each adjacent microlens is smoothly transitioned by a continuous optical surface.

2. The progressive lens according to claim 1, wherein each microlens is arranged in a regular dense arrangement, or in a random dense arrangement.

3. The progressive lens of claim 1, wherein, when each microlens is arranged in a regular dense arrangement, the shape of each microlens comprises a polygon and / or a curved polygon, and each microlens is arranged in a periodic repetition.

4. The progressive lens of claim 1, wherein, when each microlens can be arranged in a random dense arrangement, the shape of each microlens comprises an irregular polygon and / or a free curve shape, and each microlens is not arranged in a periodic repetition.

5. The progressive lens of claim 1, wherein, a transition surface between each microlens is generated by a NURBS surface modeling method.

6. The progressive lens of claim 1, wherein, each microlens in the microlens region and the lens body can form the progressive lens based on the principle of Fresnel lens.

7. The progressive lens according to any one of claims 1 to 6, wherein the microlens region is further provided in the distance vision region, the near vision region and a channel region, the refractive power of each microlens in the distance vision region is consistent, and the refractive power of each microlens in the near vision region is consistent; wherein in the first direction, the refractive power of the microlenses in the distance vision region is less than the refractive power of the microlenses in the near vision region, and the refractive power of each microlens in the channel region gradually increases.

8. The progressive lens of claim 7, wherein, microlenses in the stigmation region and the channel region are arranged in a random dense arrangement, and microlenses in the distance vision region and the near vision region are arranged in a regular dense arrangement; or, microlenses in the stigmation region are arranged in a random dense arrangement, and microlenses in the distance vision region, the near vision region and the channel region are arranged in a regular dense arrangement.

9. The progressive lens of claim 8, wherein, the size of the microlenses in the stigmation region is smaller than the size of the microlenses in other regions except the stigmation region.

10. Eyeglasses, characterized in that, The progressive lens comprises any one of claims 1-9.

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