Progressive lens and glasses

Abstract

The invention discloses a progressive lens and glasses. The progressive lens comprises a lens body and a micro lens area located on the lens body, and micro lenses in the micro lens area are arranged on the lens body in a dense laying mode; wherein the micro-lens area is at least arranged in the astigmatism area of the progressive lens, the diopters of the micro-lenses in the astigmatism area are gradually increased in the first direction, and the first direction is the direction from the far-use area to the near-use area of the progressive lens. The surface of the lens body is provided with a large number of densely-laid micro lenses, and each micro lens can bear a part of diopter change, so that the original large-scale aberration can be dispersed into a plurality of small-scale aberration accumulations. The dispersed aberration can avoid the impact of large-scale continuous distortion on vision, and reduces the visual discomfort of a wearer caused by large-scale distortion.

Description

Technical Field

[0001] The present invention relates to the technical field of optics, in particular to a progressive lens and glasses. Background Art

[0002] Progressive addition lenses (PAL lenses) provide multi-distance vision correction for presbyopic patients by achieving a continuous change in power from distance to near on the same lens. However, while achieving this gradual change in power, PAL lenses inevitably introduce significant aberrations and distortions in the lens periphery, particularly prismatic inhomogeneity and astigmatism in the horizontal meridian plane. This peripheral distortion causes relative motion or distortion of objects in the wearer's field of view when the wearer moves their eyes or shakes their head, a phenomenon known as the "surge effect." This surge effect can cause the wearer to experience a sense of shaky and unstable vision, and in severe cases, can cause dizziness and discomfort, reducing their adaptability to progressive lenses.

[0003] To mitigate the surge effect, traditional PAL lens designs employ a variety of optimization methods. For example, freeform surface optimization technology precisely controls the curvature of each point on the lens surface to balance optical performance across all viewing zones, maximizing the clear field of view and minimizing peripheral aberrations. Another example is zoned optical design, which employs different optical design strategies for different lens zones, functionally dividing the distance zone, the gradient path, and the near zone to optimize imaging performance in each area. These methods alleviate distortion to some extent, but they still have limitations. Due to the inherent constraints of the continuous surface of progressive lenses, achieving a wide distance field of view, a smooth power transition, and low aberrations simultaneously are two mutually exclusive goals. Therefore, even after optimization, traditional PAL lenses still retain a certain degree of distortion in the peripheral areas, making the surge effect difficult to completely eliminate. Summary of the Invention

[0004] The present invention provides a progressive lens and glasses to solve the discomfort caused by the surge effect when the wearer wears the progressive lens in the related art.

[0005] According to one aspect of the present invention, there is provided a progressive lens, comprising: a lens body, and a microlens area located on the lens body, wherein the microlenses in the microlens area are arranged on the lens body in a closely spaced manner;

[0006] The microlens area is at least arranged in the astigmatism area of ​​the progressive addition lens. In a first direction, the refractive power of each microlens in the astigmatism area gradually increases. The first direction is the direction from the far-vision area to the near-vision area of ​​the progressive addition lens.

[0007] Optionally, the microlenses are arranged in a regularly paved manner or in a randomly distributed paved manner.

[0008] Optionally, when the microlenses are arranged in a regularly paved manner, the shape of each microlens includes a polygon and / or a curved polygon, and the microlenses are arranged in a periodically repeated manner.

[0009] Optionally, when the microlenses are arranged in a randomly distributed and densely packed manner, the shape of each microlens includes an irregular polygon and / or a free curve, and the microlenses are not arranged in a periodically repeated manner.

[0010] Optionally, adjacent microlenses are smoothly transitioned through a continuous optical curved surface.

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

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

[0013] Optionally, the microlens area is further provided in the distance area, the near area and the channel area, the refractive power of each microlens in the distance area is consistent, and the refractive power of each microlens in the near area is consistent;

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

[0015] Optionally, the microlenses are arranged in a randomly distributed dappled manner in the astigmatism region and the channel region, and are arranged in a regularly distributed dappled manner in the distance vision region and the near vision region;

[0016] Alternatively, the microlenses are arranged in a randomly distributed paving manner in the astigmatism area, and are arranged in a regularly distributed paving manner in the distance area, the near area and the channel area.

[0017] Optionally, the sizes of the micro lenses in the astigmatism region are all smaller than the sizes of the micro lenses in other regions except the astigmatism region.

[0018] According to another aspect of the present invention, a pair of glasses is provided, characterized in that the pair of glasses comprises the progressive lens according to any embodiment of the present invention.

[0019] The technical solution of the embodiment of the present invention is to form a microlens area by arranging microlenses in a densely packed manner on the lens body of a progressive lens, and the microlens area is arranged at least in the astigmatism area of ​​the progressive lens. In a first direction, the refractive power of each microlens in the astigmatism area gradually increases. The first direction is the direction from the far vision area to the near vision area 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 portion 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, by densely packing microlenses on the surface of the lens body and gradually changing the refractive power, the refractive power gradient process of the lens body can be subdivided into multiple micro-segments, achieving fine control of optical performance and reducing the visual discomfort caused by large-scale distortion to the wearer.

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

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

[0024] Figure 3 is a schematic structural diagram of a progressive lens provided according to one embodiment of the present invention;

[0025] Figure 4 1 is a schematic diagram showing the distribution of the optical refractive power of the microlenses in the progressive addition lens according to an embodiment of the present invention as a function of position;

[0026] Figure 5 is a schematic diagram of the distribution of irregularly paved patterns on a progressive lens in an embodiment of the present invention;

[0027] Figure 6 yes Figure 5 Schematic diagram of the sag height of each microlens in . DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] The root cause of the surge effect in related art lies in the fact that the luminous intensity distribution of PAL lenses must transition from near to far within a limited area, which inevitably produces peripheral prismatic effects and aberrations. This low-frequency, large-scale distortion creates strong optic flow disturbances in dynamic vision, causing the brain to interpret this as environmental motion (i.e., creating the "swimming" illusion). The present invention employs a densely packed microlens system on the lens and gradually varies the diopter of the microlenses to disperse the originally large-scale aberrations into multiple, smaller-scale aberrations. This avoids the visual impact of large-scale, continuous distortion and mitigates the surge effect.

[0031] Figure 1 Schematic diagram of the structure of the progressive lens provided according to an embodiment of the present invention. Figure 1 As shown, the progressive lens comprises: a lens body 100, and a microlens area 101 located on the lens body 100, wherein the microlenses in the microlens area 101 are arranged on the lens body 100 in a densely packed manner;

[0032] The microlens region 101 is at least arranged in the astigmatism region 102 of the progressive addition lens. In a first direction x, the refractive power of each microlens in the astigmatism region 102 gradually increases. The first direction x is the direction from the distance zone 103 to the near zone 104 of the progressive addition lens.

[0033] It should be noted that if Figure 1As shown, the lens body 100 of a progressive lens generally includes a distance zone 103, a channel zone 105, and a near zone 104, with astigmatism zones 102 easily formed on both sides of the channel zone 105. The channel zone 105 is also called the transition zone between the distance zone 103 and the near zone 104. Astigmatism zones 102 easily form on both sides of the channel zone 105. When the wearer wants to look far away, the distance zone 103 is used, and when the wearer wants to see nearby objects, the near zone 104 is used. In this way, vision correction for both long and near distances can be achieved simultaneously through the same lens. However, when the wearer frequently switches between the distance zone 103 and the near zone 104, or shakes his head left and right, the wearer may feel that the surrounding scenery is shaking and dizzy due to the change in lens power and the aberration caused by the astigmatism zone 102. The embodiment of the present invention decomposes the originally large-scale aberrations by densely paving microlenses and gradually changing the diopter to reduce the surge effect.

[0034] It is understood that the microlenses are arranged in a close-packed manner on the lens body 100. Close-packed means that the microlenses are arranged closely together, with the edges of each microlens connected without leaving any gaps. This ensures that the surface of the lens body 100 is a continuous microlens mosaic structure with no exposed areas of the base lens. This close-packed approach ensures uniform optical effects and avoids imaging discontinuities or visual interference caused by gaps between the microlenses.

[0035] It should be noted that microlenses can be densely packed in the astigmatic region 102, where the aberration is greatest, on the lens body 100 to address the surge effect caused by the astigmatic region 102. In this regard, gradually increasing the refractive power of each microlens in the first direction x allows the microlens array to form the desired progressive refractive power distribution. The aberrations in the astigmatic region 102 can be dispersed through the arrangement of the microlenses. In one embodiment, the microlenses in the astigmatic region 102 can be aspherical. This aspherical design allows aberrations to be controlled by adjusting the curvature gradient, providing greater freedom than a simple spherical design. For example, a microlens can be designed with an aspherical front surface with a gradient curvature to simultaneously correct spherical aberration and coma of the focused light of that unit, thereby improving image quality. When multiple such optimized microlenses are spliced ​​together, the aberration accumulation of the overall lens is minimized. This further corrects higher-order aberrations such as spherical aberration and astigmatism, further optimizing image quality. Thus, by adjusting the microlenses, large, continuous regions of high astigmatism can be avoided.

[0036] Furthermore, each microlens is assigned specific refractive parameters based on its position on the lens coordinates, so that the entire array together forms the desired optical power map (i.e., a distribution of optical power that gradually increases from top to bottom). Through optimized calculations, the impact of refractive power differences between units on vision is minimized. By leveraging the human eye's ability to integrate tiny changes in visual field, the wearer perceives a continuous and smooth visual transition rather than discrete image jumps.

[0037] In some embodiments, the microlens region 101 may be disposed in other regions of the lens body 100 in addition to being disposed in the astigmatism region 102 according to actual conditions. Figure 1 The microlens area 101 marked in the figure is only an example. In practice, the boundary of the microlens area 101 may coincide with the edge of the area in the lens body 100 where the microlenses need to be laid.

[0038] Optionally, the microlenses are arranged in a regularly paved manner or in a randomly distributed paved manner.

[0039] It should be noted that regular tiling, for example, uses regular geometric units of equal size (such as triangles, rectangles, pentagons, and hexagons) arranged periodically across the lens surface; random distribution, on the other hand, refers to the random variation in size, shape, and arrangement of microlenses, without a fixed periodic structure. Different arrangements will result in different optical scattering properties, and the appropriate arrangement can be selected based on the desired distortion reduction (distortion can be inferred using optical simulation software to determine the appropriate arrangement).

[0040] In a regular tiling method, individual microlenses are repeatedly laid out in a predetermined geometric pattern. For example, the surface of the lens body 100 can be approximately flattened and divided into equal-sized hexagonal honeycomb cells, with each hexagonal region corresponding to a microlens. This hexagonal tiling allows the uniform shape to seamlessly fill the entire surface, thereby evenly covering the lens surface. Similarly, basic units such as regular triangles or regular rectangles can also be used for tiling. If a regular tiling is required on a curved surface, the non-planar curvature of the lens can be accommodated by appropriately deforming the unit shape or by using a mixture of pentagonal and hexagonal units (similar to the pentagon-hexagon mosaic on the surface of a soccer ball). Regular tiling results in an orderly and controllable structure, facilitating design and processing. The regularity of the microlens parameter variations simplifies computer modeling and CNC machining.

[0041] In an irregular, randomly distributed tiling approach, the size, shape, and position of the microlenses can be generated randomly or quasi-randomly. For example, the microlenses on the surface of the lens body 100 can have different diameters and curvatures, presenting irregular polygonal or circular contours that interlock but do not repeat periodically. The purpose of random distribution is to break up 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 residual aberrations, so that when the eye moves, the aberration changes in all directions are smoother and do not exhibit obvious periodic distortion. Although this method is more complex to design and analyze, 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 regularly paved manner, the shape of each microlens includes a polygon and / or a curved polygon, and the microlenses are arranged in a periodically repeated manner.

[0043] Among them, polygons can be regular hexagons, regular pentagons, regular triangles, etc., and curved polygons can be closed figures formed by curve segments such as circular arcs, elliptical arcs, parabolic arcs, etc., as well as straight line segments, such as curved triangles and curved quadrilaterals. These shapes are conducive to tight patchwork. In some embodiments, tiling can be performed only by polygons, or only by curved polygons, or by combining polygons and curved polygons. The mirror surface is made as seamless as possible.

[0044] For example, when using only polygonal tessellation, hexagons, with their sum of internal angles equal to 120 degrees, can seamlessly tile a surface like a honeycomb, minimizing gaps between adjacent microlenses and providing a high fill rate. Furthermore, hexagons possess sixfold rotational symmetry, allowing each microlens to be evenly distributed around six adjacent lenses. This creates a more balanced light propagation path in all directions, avoiding optical distortion or energy distribution deviations caused by uneven arrangement. Furthermore, the equal distance from the center of the hexagon to each vertex creates a more uniform distribution of incident angles for light passing through the microlenses, reducing aberrations such as spherical aberration and coma. Furthermore, when using regular tessellation, the edges of each region on the lens body 100 can also be aligned with the microlenses, minimizing gaps between the edges and preventing the introduction of new aberrations.

[0045] When using only curved polygons for tessellation, curved triangles or quadrilaterals can be tightly stitched together. The curved edges of curved triangles (such as arcs) create smoother borders after stitching, avoiding the sharp corners of traditional straight triangles. This creates a softer visual effect and allows for seamless stitching.

[0046] In addition, when polygons and curved polygons are mixed and densely laid, the curved polygons can make up for the gaps formed by the polygons, making the laid microlenses more dense. For example, a mixed arrangement of regular hexagons and curved hexagons, and a mixed arrangement of squares and curved-edge squares, can achieve a smooth transition at the edges of the microlenses.

[0047] Among them, the regular paving method makes the structure orderly and controllable, which is convenient for design and processing. The changes in the parameters of each microlens are regular, which can simplify the computer modeling and CNC processing process.

[0048] Optionally, when the microlenses are arranged in a randomly distributed and densely packed manner, the shape of each microlens includes an irregular polygon and / or a free curve, and the microlenses are not arranged in a periodic and repeated manner.

[0049] Among them, irregularly shaped microlenses refer to microlenses in which each unit has a different boundary profile, such as an unequal polygon or a free-curve boundary, which is generated by a computer algorithm so that the entire array fits together randomly like a puzzle. The choice of shape requires consideration of filling efficiency (i.e., whether it can seamlessly cover the curved surface), processing feasibility, and optical effect. Regular shape design is relatively simple and easy to control parameterized, but may introduce periodic patterns in certain directions; irregular shape design can break the periodic structure, but requires complex optimization algorithms to ensure that each unit is tightly spliced ​​and the optical performance meets the requirements. Random microstructures can disperse the remaining aberrations more evenly, so that when the eye moves, the aberration changes in all directions are smoother and do not show obvious periodic distortion.

[0050] Optionally, Figure 2 Schematic diagram of smooth transition in a progressive lens provided according to an embodiment of the present invention; Figure 2 As shown, adjacent microlenses are smoothly transitioned through continuous optical curved surfaces.

[0051] It's important to note that, regardless of whether the tessellation is regular or irregular, each adjacent microlens smoothly transitions through a continuous optical curve. That is, at the intersection of adjacent microlenses, rather than simply intersecting their respective curved surfaces (which would create ridges or steps), a mathematical method is used to gradually blend the surfaces of the two units at the boundary.

[0052] This process allows the surface of the manufactured lens to exhibit a seamless, continuous curvature, even though the microlens array is designed to be composed of numerous microlenses. The wearer will not perceive any dividing lines or steps, visually equivalent to a single, continuous optical surface. This smooth curve transition also prevents light scattering or sudden aberrations at cell boundaries, ensuring image stability as the eye scans across each cell.

[0053] It's understandable that because the refractive powers of adjacent microlenses are not exactly the same, the sagittal heights of their edges will also vary somewhat, resulting in a steeper gradient at the edges of the microlenses during smoothing. Thus, even if astigmatism is introduced at the edges of the microlenses, the discrete nature of the edges prevents the astigmatism from causing a continuous visual distortion and is therefore ignored by the human eye.

[0054] by Figure 2 For example, the hexagonal tessellation in the image is regular. The edges between adjacent microlenses have steps, which can be smoothed to create a smooth transition between adjacent microlenses. While these smooth transitions may introduce significant astigmatism, this astigmatism does not produce a continuous perception of distorted vision and is therefore ignored by the human eye.

[0055] Optionally, a transition surface is generated between each microlens using a NURBS surface modeling method.

[0056] To avoid optical abrupt changes or mechanical seams between microlenses, a continuous optical surface transition method is required. Specifically, at the boundaries between adjacent microlenses, a smooth transition of curvature is achieved by using methods such as NURBS (Non-Uniform Rational B-Splines) surface modeling. This ensures that, despite being composed of numerous small units, the entire lens surface remains a smooth, continuous surface at a macroscopic level. The wearer will not notice the presence of unit boundaries, thus preventing scattering or sudden aberrations.

[0057] NURBS surface modeling can be used to generate smooth transition surfaces between continuous optical surfaces. Given the curvature conditions of adjacent regions, control points and weights are set to ensure that the transition surface satisfies the boundary conditions of the microlenses on both sides and achieves a smooth connection.

[0058] Among them, the NURBS surface is defined by two parameters (u, v), and the expression is:

[0059] ,in, are the coordinates of the control points, is the weight of the corresponding control point, :Respectively Second-rate Spline basis function. Among them, The spline basis function is a piecewise polynomial function defined by the knot vectors, which determines the shape of the surface within the parameter interval. is the number of control point grids in space. . u, v are the curvature conditions of adjacent areas.

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

[0061] It is understood that each microlens and the lens body 100 can form a progressive lens based on the Fresnel lens principle. Through this arrangement, the thickness of the progressive lens can be reduced, and the weight of the progressive lens can be reduced, thereby improving the wearer's satisfaction.

[0062] Optionally, Figure 3 1 is a schematic structural diagram of a progressive lens provided according to an embodiment of the present invention. Figure 4 This is a schematic diagram showing the distribution of the optical refractive power of the microlenses in the progressive lens according to the embodiment of the present invention. Figure 3 and Figure 4 As shown, the microlens area 101 is further arranged in a distance area 103, a near area 104, and a channel area 105. The refractive powers of the microlenses in the distance area 103 are consistent, and the refractive powers of the microlenses in the near area 104 are consistent. In the first direction x, the refractive powers of the microlenses in the distance area 103 are smaller than those of the microlenses in the near area 104, and the refractive powers of the microlenses in the channel area 105 gradually increase.

[0063] The microlens region 101 can be provided only in the astigmatism region 102, or in the astigmatism region 102 and the channel region 105, or in the astigmatism region 102, the distance vision region 103, the near vision region 104, and the channel region 105. Whether microlenses are provided in a particular region of the lens body 100 can be determined based on the degree of astigmatism in that region. The greater the degree of astigmatism, the more necessary it is to provide microlenses. Conversely, the smaller the degree of astigmatism, the less microlenses may be provided. In this embodiment, microlenses are provided throughout the entire lens body 100.

[0064] It is understood that when laying out microlenses, each one possesses its own optical power, including spherical power (focal power), or spherical power (focal power) and cylindrical power (astigmatism correction). In embodiments of the present invention, the microlens array as a whole provides the same far-mid-near gradient function as a progressive lens, but this function is achieved through the collaborative work of numerous discrete small lenses. To achieve this, the refractive parameters of the microlenses must be optimized zone by zone, based on the lens's visual zone and the medical prescription (e.g., prescription).

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

[0066] Along the gradient channel (intermediate transition zone), the spherical power of the microlenses gradually transitions, increasing the added power to meet mid-range vision requirements. Cylinder power may be gradually adjusted to control astigmatism, or it may be completely absent. Microlens parameters require a fine gradient to ensure a smooth transition from distance to near vision, so that the user does not experience abrupt power jumps as they move between lens units.

[0067] In the microlens area corresponding to the near viewing zone, the units provide the higher diopter power required for reading distance. The spherical power of the microlenses here meets the prescribed near reading value, with cylinder power adjusted as needed or completely absent. Because the near viewing zone requires a wider field of view due to the close viewing distance, the effective aperture of the microlens units can be appropriately increased or aberrations can be reduced.

[0068] For example, Figure 3 As shown, the micro lens area 101 is only an example in the figure and is not limited to Figure 3 The area drawn in . Figure 4 The equivalent optical power distribution of each part of the lens surface is shown in the form of a color map. Figure 4 It can be seen that the diopter gradually increases from the upper distance zone to the lower near zone of the lens body; at the same time, the diopter change gradient in the peripheral area is refined into small local changes. Furthermore, the overall diopter gradient is refined into gradients in multiple small areas through the microlens array design.

[0069] Optionally, the microlenses are arranged in a randomly distributed paving manner in the astigmatism region 102 and the channel region 105, and are arranged in a regularly paved manner in the distance vision region 103 and the near vision region 104; or, the microlenses are arranged in a randomly distributed paving manner in the astigmatism region 102, and are arranged in a regularly paved manner in the distance vision region 103, the near vision region 104, and the channel region 105.

[0070] It should be noted that, because the astigmatism in astigmatic region 102 is severe, a random dappled pattern of microlenses can be used to further reduce the wearer's perception of the array structure and more evenly distribute the remaining aberrations. This ensures that when the eye moves, aberrations in all directions change more smoothly, without exhibiting noticeable periodic distortion. Similarly, in channel region 105, where the astigmatism is less severe, a random dappled pattern of microlenses can also be used.

[0071] Alternatively, the microlenses in the distance area 103, the near area 104, and the channel area 105 may be arranged in a regular tessellation manner, thereby simplifying the computer modeling and numerical control processing processes.

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

[0073] It is understandable that, due to the severe astigmatism in the astigmatic region 102 , the size of each microlens in the astigmatic region 102 can be made smaller to generate a higher-frequency distortion signal, thereby further masking the large-scale astigmatism signal originally present in the astigmatic region 102 , allowing the wearer to ignore the original large-scale astigmatism signal when wearing the glasses.

[0074] in, Figure 5 Schematic diagram of the distribution of irregularly paved patterns on a progressive lens in an embodiment of the present invention. Figure 6 for Figure 5 Schematic diagram of the sag height of each microlens in . Figure 5 As shown, in the irregular tessellation method, different colors represent different microlenses, which include irregular heptagons, hexagons, pentagons, quadrangles, etc. In this way, the large-scale astigmatism signal of the original astigmatism area 102 can be further concealed.

[0075] To achieve the above-mentioned microlens array progressive lens design, precise manufacturing processes are required to process complex free-form surface structures. The following are several feasible manufacturing methods:

[0076] Free-form surface CNC machining uses high-speed, high-precision CNC machines or turning equipment to directly machine the complex curved contours of the microlens array onto the surface of the lens blank. Modern five-axis CNC grinding / turning machines and free-form lathes achieve nanometer-level precision, ensuring that the curvature of each microlens unit is precisely tailored to the design. This method is suitable for the production of custom single-piece lenses.

[0077] Ultra-precision turning, using single-point diamond tools, can produce optical-quality microstructured surfaces. By controlling the tool path, the desired microlens array topography can be machined onto the substrate, achieving surface roughness down to the nanometer level, ensuring optical performance. This method is particularly suitable for machining microlens arrays or molds with smaller diameters.

[0078] Mold forming involves first using micromachining techniques to create a mold for the microlens array structure, then mass-producing the lenses using molding processes such as injection molding and compression molding. For example, ultra-precision machining is used to create a metal mold cavity with the desired negative shape of the microlens array. Optical-grade resin or glass is then formed and cured in the mold to produce a microlens array lens that complements the mold shape. This method is suitable for large-scale production of highly consistent lens products.

[0079] Nanoimprinting uses photolithography and etching techniques to create a microlens array template on a substrate. This micro-nanostructure is then transferred to the surface of an optical lens material using nanoimprinting. Nanoimprinting offers high resolution and high reproducibility, enabling the simultaneous imprinting of a complete microlens array onto a large lens surface. This technology promises to improve production efficiency and enable the fabrication of complex structures with submicron precision.

[0080] The microlens array progressive lens required by the embodiment of the present invention can be manufactured by the above processes or their combination. During the manufacturing process, special attention should be paid to the connection accuracy and surface finish of the microlens edges to ensure the realization of a smooth transition design and optical quality.

[0081] According to another aspect of the present invention, a pair of glasses is provided, characterized in that the pair of glasses comprises the progressive lens according to any one of the embodiments of the present invention.

[0082] The glasses proposed in the embodiments of the present invention can have the same beneficial effects as progressive lenses. Among them, the microlens array progressive lens design proposed in the present invention significantly improves the wearer's dynamic field of view stability in terms of technical effects. First, since the large-scale distortion is dispersed to many small-scale microlenses, when the wearer turns his eyes or head, the aberration changes in each field of view area are more subtle and gentle, and the surge effect is significantly reduced. Compared with the progressive lenses in the related art, when the wearer looks quickly in different directions using the lenses of this design, the objects in the field of view are no longer distorted or shaken as violently as in the past, but remain relatively stable. Experimental and simulation results show that the microlens array can weaken the astigmatism gradient in the peripheral field of view, thereby minimizing the dynamic distortion generated during movement.

[0083] Secondly, the progressive lenses proposed in the embodiments of the present invention improve wearing comfort and adaptability. By reducing visual shakiness, new wearers can more easily adapt to the imaging characteristics of progressive lenses, reducing transitional discomfort. Furthermore, the refined design of the microlenses ensures uncompromised clarity in both the distance and near vision zones. Furthermore, due to the more uniform distribution of distortion, the wearer may experience a wider effective field of view. This is particularly beneficial for those who frequently use progressive lenses while exercising or moving around (for example, the elderly ascending and descending stairs, or drivers tilting their heads to check the rearview mirror), who will experience a more stable field of vision.

[0084] In addition, through reasonable parameter design, the microlens array lens can maintain the optical performance required by the prescription while reducing distortion, without affecting the vision correction effect. Each microlens unit accurately provides the required refractive power to ensure clear vision at far, medium and near distances. In addition, the smooth transition structure makes the lens appearance still smooth, ensuring beautiful appearance and easy daily cleaning, without the problem of dirt adhesion that may be caused by complex structures. In summary, the progressive lens using the solution of the present invention has made a qualitative leap in dynamic visual experience, solved the surge effect problem that has long plagued wearers, and has significant practical value and market prospects.

[0085] In summary, the technical solution of the embodiment of the present invention forms a microlens area by arranging microlenses in a densely packed manner on the lens body of a progressive lens, and the microlens area is arranged at least in the astigmatism area of ​​the progressive lens. In a first direction, the refractive power of each microlens in the astigmatism area gradually increases. The first direction is the direction from the far-field area to the near-field area 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 portion 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, by densely packing microlenses on the surface of the lens body and gradually changing the refractive power, the refractive power gradient process of the lens body can be subdivided into multiple micro-segments, achieving fine control of optical performance and reducing the visual discomfort caused by large-scale distortion to the wearer.

[0086] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0087] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A progressive lens, characterized in that: include: A lens body, and a microlens area located on the lens body, wherein the microlenses in the microlens area are arranged on the lens body in a densely packed manner; The microlens area is at least arranged in the astigmatism area of ​​the progressive addition lens, and the refractive power of each microlens in the astigmatism area gradually increases in a first direction, and the first direction is the direction from the far-vision area to the near-vision area of ​​the progressive addition lens.

2. The progressive lens according to claim 1, wherein: The microlenses are arranged in a regular paving manner or in a randomly distributed paving manner.

3. The progressive lens according to claim 1, wherein: When the microlenses are arranged in a regularly paved manner, the shape of each microlens includes a polygon and / or a curved polygon, and the microlenses are arranged in a periodically repeated manner.

4. The progressive lens according to claim 1, wherein: When the microlenses are arranged in a randomly distributed and densely packed manner, the shape of each microlens includes an irregular polygon and / or a free curve, and the microlenses are not arranged in a periodic and repeated manner.

5. The progressive lens according to claim 1, wherein: Adjacent microlenses are smoothly transitioned through continuous optical curved surfaces.

6. The progressive lens according to claim 5, characterized in that A transition surface is generated between the micro-lenses using a NURBS surface modeling method.

7. The progressive lens according to claim 1, wherein: Each of the microlenses in the microlens area and the lens body can form the progressive lens based on the Fresnel lens principle.

8. The progressive lens according to any one of claims 1 to 7, characterized in that: The microlens area is further arranged in the distance area, the near area and the channel area, the refractive power of each microlens in the distance area is consistent, and the refractive power of each microlens in the near area is consistent; In the first direction, the refractive power of the microlens in the distance region is smaller than that of the microlens in the near region, and the refractive power of each microlens in the channel region gradually increases.

9. The progressive lens according to claim 8, characterized in that The microlenses are arranged in a randomly distributed paving manner in the astigmatism area and the channel area, and are arranged in a regularly paving manner in the distance vision area and the near vision area; Alternatively, the microlenses are arranged in a randomly distributed paving manner in the astigmatism area, and are arranged in a regularly distributed paving manner in the distance area, the near area and the channel area.

10. The progressive lens according to claim 9, characterized in that The sizes of the micro lenses in the astigmatism region are all smaller than the sizes of the micro lenses in other regions except the astigmatism region.

11. A pair of glasses, characterized in that: The method comprises the progressive lens according to any one of claims 1 to 10.

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