Progressive lens and glasses

Abstract

The progressive lens comprises a lens body and a micro-lens area located on the lens body, the micro-lens area comprises a plurality of micro-lenses, and astigmatism formed at the position, corresponding to the surface of the lens body, of at least one micro-lens can be counteracted with astigmatism at the same position of the lens body; the micro lens area at least covers the astigmatism area of the lens body. Therefore, according to the embodiment of the invention, the micro lenses corresponding to astigmatism are arranged at the astigmatism parts of the lens bodies, so that the astigmatism of the micro lenses can counteract the astigmatism of the lens bodies at the arrangement positions, and astigmatism is basically avoided when a wearer wears the glasses. Furthermore, when a wearer wears the glasses, the dizziness caused by the surging effect cannot occur even if the wearer turns the head or shakes, and the user experience can be improved.

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 (PALs) achieve continuous vision across distance, near, and intermediate distances by gradually varying the refractive power of the lens. However, this continuous change in power comes with a serious optical problem: undesirable astigmatism. Because the curvature of the lens surface gradually increases perpendicularly from distance to near, according to optical theory, each point has two orthogonal principal curvatures, resulting in a pair of principal powers, P1 and P2. The amount of surface astigmatism at that point is the difference between the two principal powers. While ideally, clarity beyond the central visual axis is desirable, in reality, progressive lenses inevitably produce significant astigmatism in the peripheral areas, creating blurred areas.

[0003] When the wearer views objects through the peripheral area of ​​a progressive lens, astigmatism causes inconsistent magnification in different directions. This distortion occurs as the eye moves away from the optical center and is often referred to as the "swimming effect" or "surge effect." When the wearer turns their head or eyes, the surrounding scenery appears to move relative to the wearer, as if their field of vision is swaying. Severe surge effects can cause dizziness and discomfort, leading to initial difficulty adapting to new lenses. These effects can also significantly prolong the adaptation time to new lenses and may even make them intolerable to some sensitive individuals. Summary of the Invention

[0004] The present invention provides a progressive lens and glasses to solve the problem in the related art that progressive lenses have astigmatism, causing a surge effect and resulting in a poor user experience.

[0005] According to one aspect of the present invention, a progressive lens is provided, comprising: a lens body, and a microlens region located on the lens body, wherein the microlens region includes a plurality of microlenses, and the astigmatism formed by at least one of the microlenses at a position corresponding to a surface of the lens body can offset the astigmatism at the same position on the lens body itself;

[0006] The micro lens area at least covers the astigmatism area of ​​the lens body.

[0007] Optionally, in the astigmatism area, each of the microlenses is distributed in a closely arranged manner at a position in the lens body where the astigmatism is greater than a preset astigmatism, or each of the microlenses is distributed in a discrete dot matrix manner at a position in the lens body where the astigmatism is greater than a preset astigmatism.

[0008] Optionally, the micro lens area also covers the channel side area of ​​the lens body.

[0009] Optionally, in the area beside the channel, each of the microlenses is distributed in a closely arranged manner at a position in the lens body where the astigmatism is greater than a preset astigmatism, or each of the microlenses is distributed in a discrete dot matrix manner at a position in the lens body where the astigmatism is greater than a preset astigmatism.

[0010] Optionally, in the area beside the channel, the astigmatism axis of each microlens is perpendicular to a first direction, and there is a continuous smooth transition surface between each microlens, wherein the first direction is the direction from the far vision area to the near vision area of ​​the lens body.

[0011] Optionally, the micro lens area also covers the far vision area and the near vision area of ​​the lens body.

[0012] Optionally, in the distance vision area and the near vision area, each of the micro lenses is distributed in a discrete dot matrix form at a position in the lens body where the astigmatism is greater than a preset astigmatism.

[0013] Optionally, in the far vision area and the near vision area, the astigmatism axis of each microlens is parallel to the astigmatism axis at the same position of the lens body itself, and the size of the astigmatism formed by each microlens at the position corresponding to the surface of the lens body is the same as the size of the astigmatism at the same position of the lens body itself, but the positive and negative are opposite.

[0014] Optionally, each of the micro lenses is a cylindrical micro lens or a toric lens.

[0015] The surface of each micro lens away from the lens body is a spherical surface, the shape of the surface adjacent to the lens body is the same as the surface shape of the lens body, and the surface of the lens body away from the micro lens is a spherical surface.

[0016] According to another aspect of the present invention, a pair of glasses is provided, comprising the progressive lens according to any embodiment of the present invention.

[0017] The technical solution of an embodiment of the present invention provides a progressive lens and glasses, wherein the progressive lens includes: a lens body, and a microlens area located on the lens body, the microlens area including a plurality of microlenses, at least one of the microlenses forming astigmatism at a position corresponding to the surface of the lens body that can offset the astigmatism at the same position on the lens body itself; the microlens area at least covers the astigmatism area of ​​the lens body. Therefore, this embodiment of the invention arranges microlenses corresponding to the astigmatism in the portion of the lens body that has astigmatism. In this way, if the astigmatism of all the microlenses can offset the astigmatism of the lens body at the arrangement position, the wearer will essentially no longer experience astigmatism when wearing the glasses. Furthermore, even if the wearer turns their head or shakes while wearing the glasses, they will not experience dizziness caused by the surge effect, which can improve the user experience.

[0018] 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

[0019] 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.

[0020] Figure 1 is a schematic structural diagram of a progressive lens provided according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the refractive power distribution of a progressive addition lens provided according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of astigmatism distribution of a progressive addition lens provided according to an embodiment of the present invention;

[0023] Figure 4 2 is a schematic diagram of the distribution of astigmatism vectors of a progressive addition lens provided according to an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the distribution of micro lenses of a progressive lens provided according to one embodiment of the present invention. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] In the design of progressive lenses, a fundamental principle is defined by the Minkwitz theorem: The rate of increase of surface astigmatism in the lateral direction on either side of the center of the progression corridor (the principal power gradient) is approximately twice the rate of change of power in the vertical direction. Simply put, if the power increases by, say, +0.25D for every 1mm drop along the vertical corridor, then the astigmatism in the horizontal direction will inevitably increase at approximately twice this rate. This theorem dictates the lower limit of the astigmatism-power distribution. Therefore, traditional designs cannot reduce peripheral astigmatism to zero, forcing compromises to be made in various locations. Modern PAL designs typically limit the maximum astigmatism to a level close to the added power. For example, a lens with a +2.00D added power often has a maximum astigmatism of around 2.00D. This means that when the wearer views objects through the lens periphery, they experience an additional cylindrical distortion of approximately 2 degrees, which is the root cause of blurred and distorted vision.

[0028] Peripheral blur and distortion caused by astigmatism can lead to decreased dynamic vision. Distortion of straight lines (called tilt distortion) causes images to no longer be orthogonal, making symmetrical objects appear distorted. More critically, when the head or eyes move, the prismatic effect and magnification differences in different visual zones cause inconsistent changes in the image's position and size, creating a "wobbling" sensation. The wearer may experience objects accelerating or decelerating, causing dizziness. These effects can significantly prolong the adaptation time to new lenses and may even make them intolerable for some sensitive individuals. Therefore, reducing the intensity of astigmatism in the periphery of progressive lenses and alleviating the surge effect are key issues in improving visual quality and wearer comfort.

[0029] The following describes, with reference to the accompanying drawings, progressive lenses and glasses according to embodiments of the present invention. These lenses achieve a smooth transition between near and far distance power while minimizing undesirable astigmatism, thereby minimizing visual disturbances caused by "swimming" distortion. Ideally, these lenses provide the wearer with a stable and clear field of vision, whether observing statically or dynamically.

[0030] Figure 1Schematic diagram of the structure of the progressive lens provided according to an embodiment of the present invention. Figure 1 As shown, the progressive lens 100 includes: a lens body 101, and a micro-lens area 102 located on the lens body 101. The micro-lens area 102 includes a plurality of micro-lenses 103. The astigmatism formed by at least one micro-lens 103 at a position corresponding to the surface of the lens body 101 can offset the astigmatism at the same position of the lens body 101 itself; the micro-lens area 102 at least covers the astigmatism area 104 of the lens body 101.

[0031] Among them, reference Figure 1 The lens body 101 includes a far vision area 105, a channel area and a near vision area 107, wherein the channel area is also called the transition area between the far vision area 105 and the near vision area 107. The channel area refers to the line from the far point to the near point, and this part basically has no astigmatism. The two sides of the channel area, that is, the channel side areas 106, are prone to astigmatism, and the closer to the lens edge along the direction perpendicular to the channel from the channel side areas 106, the easier it is to form astigmatism areas 104. When the wearer wants to look into the distance, the far vision area 105 is used, and when the wearer wants to see nearby objects, the near vision area 107 is used. In this way, the same lens can achieve long-distance and near-distance vision correction at the same time. However, when the wearer frequently switches between the far vision area 105 and the near vision area 107, or shakes his head left and right, due to the change in lens power and the astigmatism caused by the astigmatism area 104, the wearer will feel that the surrounding scenery is shaking and has a sense of dizziness. In the embodiment of the present invention, a microlens area 102 is provided in the astigmatism area 104, so that at least one microlens 103 in the microlens area 102 has astigmatism that is different from the astigmatism at the arrangement position, thereby offsetting the astigmatism at the arrangement position, so that the wearer can clearly see the surrounding scenery without feeling dizzy when switching between the distance vision area 105 and the near vision area 107.

[0032] Figure 2 Schematic diagram of the diopter distribution of a progressive addition lens provided according to an embodiment of the present invention. Figure 3 Schematic diagram of astigmatism distribution of a progressive lens provided according to an embodiment of the present invention. Figure 2 As can be seen in the figure, the diopter in the distance zone 105 is smaller than that in the access zone, which in turn is smaller than that in the near zone 107. The blue color represents the distance zone 105, and the red represents the near zone 107. A transition zone separates the two. To minimize the sudden change between the distance zone 105 and the near zone 107, the diopter in the transition zone is divided more finely to allow for a gradual change. Figure 3 Zhongwei Figure 2 Schematic diagram of the astigmatism obtained by the lens. Figure 3The lighter the blue, the more severe the astigmatism, and the darker the blue, the milder the astigmatism. Figure 3 As can be seen in the figure, astigmatism is most severe in astigmatism region 104, with a maximum astigmatism of 1.95D. While astigmatism is present in distance vision region 105 and near vision region 107, it is not as severe as in astigmatism region 104. Furthermore, in this embodiment of the present invention, microlens region 102 is required to be positioned at least in astigmatism region 104 to sharpen the area with the most severe astigmatism. In other embodiments, microlens region 102 may also be positioned in other areas with astigmatism to minimize astigmatism in lens body 101.

[0033] Figure 4 Schematic diagram of the distribution of astigmatism vectors of a progressive addition lens provided according to an embodiment of the present invention. Figure 5 Schematic diagram of the distribution of micro lenses of a progressive lens provided according to one embodiment of the present invention. Figure 4 As can be seen from FIG, the magnitude and direction of each astigmatism in the lens body 101. It can be understood that, Figure 4 The astigmatism distribution in can be obtained by Figure 2 The distribution of diopters and Minkwitz's theorem are used to deduce the astigmatism of any point on the progressive surface. The magnitude of the surface astigmatism at any point on the progressive surface can be expressed as the difference in focal length between the two principal curvatures at that point. And the change in vertical diopters will multiply the increase in horizontal astigmatism. Therefore, we can use Figure 4 The micro lenses 103 in the micro lens area 102 are arranged in the case of medium astigmatism (eg Figure 5 As shown in FIG, at least one micro lens 103 is arranged to offset the astigmatism at that position on the lens body 101. This allows the wearer to clearly see the surrounding scene while wearing the lens, thereby improving wearing comfort.

[0034] If the magnitude of the astigmatism of each microlens 103 is the same as the astigmatism at that location on the lens body 101, but with opposite signs and the same direction, all astigmatism on the lens body 101 can be offset. However, this may sometimes present certain technical difficulties. Therefore, the above arrangement can be performed in areas with larger astigmatism. For easier processing, in areas with smaller astigmatism, the microlenses 103 can be arranged in a corresponding regular pattern. This can also alleviate the astigmatism problem of the lens body 101.

[0035] Optionally, in the astigmatism area 104, each microlens 103 is densely arranged at a position in the lens body 101 where the astigmatism is greater than a preset astigmatism, or each microlens 103 is discretely distributed in a dot matrix at a position in the lens body 101 where the astigmatism is greater than a preset astigmatism.

[0036] Generally, astigmatism below the preset astigmatism level is not easily perceived by the human eye, and correction is then performed above the preset astigmatism level. The preset astigmatism level may be +1.00D. In this embodiment, the microlenses 103 in the microlens area 102 can be arranged in two ways: closely packed microlenses 103 and discretely packed microlenses 103.

[0037] It should be noted that the closely packed microlenses 103 refer to the ability to optimize the use of a microlens array structure within specific areas of a progressive lens. A microlens array is an optical structure composed of a large number of tiny lens units arranged in a specific pattern, similar to the compound eye of an insect. Integrating this array onto the surface of a progressive lens is equivalent to discretizing an otherwise continuous optical surface into multiple small lenses. By engineering the optical properties of each microlens 103, astigmatism can be corrected or offset locally, thereby smoothing the overall astigmatism distribution. The introduction of a microlens array has two primary objectives: first, to reduce the peak and range of surface astigmatism, thereby reducing peripheral blur; and second, to mitigate the surge effect, which results in more stable and controllable image distortion in the field of view as the eye moves through different areas, eliminating sudden accelerations and "drifts." By redistributing light through the microlenses 103, a more uniform distribution of optical astigmatism can be achieved, making it easier for the wearer to adapt. The microlens array can be considered a special optical "compensator" superimposed on the lens surface.

[0038] Each microlens 103 (typically 0.8-3mm in size) exerts a certain degree of convergence on the light passing through it. This allows the microlens 103 to provide astigmatism that is opposite to that of the original free-form surface. For example, if a point on the original surface has +1.00D of astigmatism, the microlens 103 can introduce a local cylindrical effect of -1.00D to offset it. The astigmatism axis of the microlens 103 aligns with that of the lens itself. This ensures that the final wavefront of the emitted light is closer to the ideal state. Furthermore, due to the small size and dense arrangement of the microlenses 103, the human eye often simultaneously passes through multiple microlenses 103 when looking in a given direction. These units work together to form multiple, slightly offset, tiny images on the retina. These images are integrated by the brain, creating an "averaging" effect that extends depth of field or reduces astigmatic blur. This is similar to reducing the effect of single-channel distortion by averaging multiple channels.

[0039] In addition, by properly designing the curvature and arrangement of the microlenses 103, the optical power and astigmatism distribution of the progressive lens can be redistributed without significantly sacrificing image clarity. For example, in the intermediate area between the distance zone 105 and the near zone 107, the astigmatism is originally the most severe and the visual "dead zone" is the largest. If a microlens array is implanted in this area to locally smooth the luminosity gradient, the difference in optical performance between different visual zones can be reduced, making the transition smoother. Some new multi-segment / multi-aperture optical designs can provide better imaging quality under dynamic fields of view. Furthermore, optimizing progressive lenses with a compound-eye microlens array will significantly reduce undesirable astigmatism and the resulting surge distortion, thereby improving visual clarity and shortening adaptation time. In addition to the tightly arranged arrangement, other tiling methods can also be used, such as square grids or concentric rings.

[0040] Discretely arranged microlenses 103 means that a small number of microlenses 103 are embedded in a dot matrix in high astigmatism areas, with gaps between them to form a discrete distribution. Each microlens 103 can be regarded as an independent "correction island", providing astigmatism compensation only in the area it covers, while the uncovered gap area retains the original lens surface. In practical terms, it is equivalent to inserting a compensating lens at the "hot spot" where the blur is most severe. For example, an area with astigmatism ≥1.00D can be selected, and microlenses 103 with a diameter of 1 to 2 mm can be arranged at a certain interval. The advantage of discrete arrangement is that it has little interference with the main visual axis and clear area, maintaining the original optical performance of most of the field of view; at the same time, because the microlenses 103 are discontinuous with each other, astigmatism compensation is mainly limited to a local area, and it is not easy to produce large-scale diffraction or artifacts.

[0041] The close arrangement allows for full coverage of the target area, eliminating a clear visual boundary between the clear area and the microlenses 103, thus avoiding the uneven field of view that can occur with discrete arrangements. Discrete arrangements can compensate for the most severe astigmatism, saving costs. The choice can be made based on the distribution of astigmatism within the astigmatic region 104.

[0042] Optionally, the micro lens area 102 also covers the channel side area 106 of the lens body 101 .

[0043] It should be noted that the microlens area 102 is not only located in the astigmatism area 104, but also in the side-channel area 106. This is because the microlens area 102 is essential for the astigmatism area 104, and since astigmatism is strongest in the astigmatism area 104, the microlens area 102 can largely mitigate the surge effect caused by astigmatism. However, the side-channel area 106 also causes some astigmatism due to the transition between the distance zone 105 and the near zone 107. Therefore, the microlens area 102 in the side-channel area 106 can further mitigate the surge effect caused by astigmatism.

[0044] When arranging the microlens region 102, the direction and intensity of the astigmatism of the microlenses 103 in the astigmatism region 104 can be opposite to the direction and the intensity can be the same as the astigmatism at the same position in the lens body 101. The microlenses 103 can be arranged regularly (closely or discretely) in the channel-side region 106.

[0045] Optionally, in the channel side area 106, each microlens 103 is distributed in a densely arranged manner at a position in the lens body 101 where the astigmatism is greater than a preset astigmatism, or each microlens 103 is distributed in a discrete dot matrix manner at a position in the lens body 101 where the astigmatism is greater than a preset astigmatism.

[0046] Generally, astigmatism below the preset astigmatism is not easily perceived by the human eye, so correction is performed above the preset astigmatism. The preset astigmatism can be +1.00D. In this embodiment, the microlenses 103 in the microlens area 102 can be arranged in two ways: a densely packed array of microlenses 103 and a discrete array of microlenses 103. It is understood that the dense or discrete arrangement can be described in the previous section and will not be elaborated here. Each arrangement has its own emphasis. The discrete arrangement primarily maintains the original optical properties of the lens while providing local compensation. The compact (compound-eye) arrangement pursues comprehensive correction to significantly reduce astigmatism and pulsation. In practice, depending on the distribution of astigmatism, a mixed approach (for example, a honeycomb array in the primary high-astigmatism area and a discrete dot matrix in the edge transition area) can be used to balance visual quality and comfort.

[0047] Exemplarily, the microlenses 103 may be arranged in a dense arrangement in both the astigmatism region 104 and the channel-side region 106, or in a discrete arrangement in both. Alternatively, the microlenses 103 may be arranged in a dense arrangement in the astigmatism region 104 and in a discrete arrangement in the channel-side region 106. Alternatively, the microlenses 103 may be arranged in a discrete arrangement in the astigmatism region 104 and in a dense arrangement in the channel-side region 106.

[0048] Optionally, in the channel side area 106 , the cylindrical axis of each microlens 103 is perpendicular to the first direction, and there is a continuous smooth transition surface between each microlens 103 , wherein the first direction x is the direction from the distance area 105 of the lens body 101 to the near area 107 .

[0049] It should be noted that the surge effect is closely related to astigmatism and prismatic gradient. When the eyeball moves to the peripheral area, different optical powers and base prism effects cause uneven image movement. Reducing the surge effect requires controlling the rate of change of optical parameters in the field of view. When the microlenses 103 are closely arranged, the microlens array refines the optical zone so that the brightness changes in each cell are slowed down, and the total change across cells is shared. In this way, as the line of sight sweeps across the lens, the changes in brightness and prism are completed in multiple steps, rather than changing rapidly on a continuous surface, thereby reducing the peak value of the rate of change. According to the design principles of progressive lenses, reducing the rate of change of brightness / prism in the vertical and horizontal directions can reduce image shake.

[0050] In this embodiment, the arrangement of microlenses 103 increases the intensity of light, originally concentrated in a certain area, and distributes it across multiple microlenses 103 in a gradual transition, similar to dividing a steep slope into steps. As a result, the wearer's perception of image "acceleration" is greatly reduced. Furthermore, because the microlens array causes the human eye to simultaneously perceive multiple, slightly offset images, these images fuse in the brain, effectively expanding the depth of field. This effect reduces the eye's focus sensitivity, making slight errors in power or astigmatism less noticeable and reducing the sensation of dizziness caused by the surging motion.

[0051] For example, by introducing microlenses 103 in horizontal strips, where the cylindrical axis of the microlenses 103 is primarily oriented horizontally, vertical power variation can be more effectively controlled. For example, the progressive corridor area can be divided into several strips along the horizontal strip, with each strip equipped with narrow microlenses 103 (with the long axis oriented horizontally). These microlenses 103 provide localized focus / divergence in the vertical direction, replacing the portion of the power gradient provided by the original continuous surface. Because each horizontal strip provides a complete transition from far to near power, a more gradual vertical power gradient can be achieved, reducing the vertical power change rate and helping to mitigate the vertical surge effect. However, this horizontal arrangement creates distinct bands, and as the eye moves up and down through the different strips, the power may be perceived as changing at the intersection of the strips. If not handled properly, this can resemble a hybrid experience of traditional progressive lenses and bifocals, resulting in a slight "jump" sensation. Therefore, it is necessary to smooth the boundary by optimizing the transition between the microlenses 103 bands (for example, allowing the optical properties of the microlenses 103 in adjacent bands to slightly overlap, or using mathematical methods to allow the surfaces of the two units to gradually transition and blend in the boundary area).

[0052] Furthermore, while the surfaces between individual microlenses in the microlens array are designed to transition as smoothly as possible, they still have ridges formed by connecting lines, making the overall lens surface uneven. This creates a multi-pupil effect, somewhat circumventing the smooth, continuous surface limitation of the Minkwitz theorem, thereby resolving the astigmatism introduced by smooth surfaces under the Minkwitz theorem. This embodiment reduces astigmatism and surge through the optical surface formed by the microlens array, thereby simultaneously reducing static astigmatic blur and dynamic surge distortion.

[0053] Optionally, the micro lens area 102 also covers the distance zone 105 and the near zone 107 of the lens body 101 .

[0054] The microlens region 102 can be provided only in the astigmatism region 104, or in the astigmatism region 104 and the para-channel region 106, or in the astigmatism region 104, the distance vision region 105, the near vision region 107, and the para-channel region 106. Whether a microlens 103 is provided in a particular region of the lens body 101 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 a microlens 103. Conversely, the smaller the degree of astigmatism, the less necessary it is to provide a microlens 103. In this embodiment, the microlens 103 are provided throughout the lens body 101 to minimize astigmatism in the lens body 101.

[0055] Optionally, in the distance zone 105 and the near zone 107 , the micro lenses 103 are distributed in a discrete matrix at positions in the lens body 101 where the astigmatism is greater than a preset astigmatism.

[0056] Since the astigmatism in the distance area 105 and the near area 107 is smaller than that in the channel side area 106 and the astigmatism area 104 and the astigmatism density is relatively low, the micro lenses 103 can be arranged in a discrete dot matrix form.

[0057] It is understood that on the lens body 101, the microlenses 103 can be arranged in a discrete manner in all areas, or the microlenses 103 can be arranged in a dense manner in the astigmatism area 104 and the para-channel area 106, and in a discrete manner in the distance zone 105 and the near zone 107. In this way, when the latter arrangement is used, the degree of scattering that can be reduced in the astigmatism area 104 and the para-channel area 106 is greater than the degree of astigmatism that can be reduced in the distance zone 105 and the near zone 107.

[0058] Optionally, in the distance vision area 105 and the near vision area 107, the astigmatism axis direction of each microlens 103 is parallel to the astigmatism axis direction at the same position of the lens body 101 itself, and the magnitude of the astigmatism formed by each microlens 103 at the position corresponding to the surface of the lens body 101 is the same as the magnitude of the astigmatism at the same position of the lens body 101 itself, but the positive and negative directions are opposite.

[0059] It will be appreciated that while the arrangement of microlenses 103 can partially offset astigmatism in the lens body 101, given that the axial direction of astigmatism in the periphery of a progressive lens is not uniform but rather varies with position (typically exhibiting a gradually rotating oblique axis distribution), in a preferred embodiment, microlenses with different orientations can be used in different areas. In other words, the optical axis of the microlenses 103 is locally aligned with the principal axis of the original astigmatism in that area to achieve the most effective offset. For example, in the upper, nasal area, where the astigmatism axis may be approximately 45°, microcylindrical lenses with an axial direction of 45° can be deployed to offset it. Meanwhile, in the lower, ear-side area, where the axial direction is closer to 135°, lenses with an axial direction of 135° can be deployed there. In this way, each microlens 103 is tailored to specifically correct the astigmatism in that area. In this embodiment, the curvature and angle of each microlens 103 can be customized. This localized anisotropic correction, because it perfectly spatially matches the original astigmatism distribution, optimizes astigmatism correction and surge control.

[0060] In a more preferred embodiment, the principle axis of each microlens 103 can be aligned parallel to the principal meridian (i.e., arranged horizontally; in other embodiments, vertical arrangement is also possible), supplemented by localized small-angle adjustments. For example, the microlens array is generally arranged with the astigmatism axis horizontally to ensure a smooth macroscopic transition. However, in areas with particularly strong astigmatism, some microlenses 103 can be slightly rotated to more accurately align the astigmatism axis, thereby improving correction efficiency. Simultaneously, the orientation of the microlens 103 is slowly varied spatially to introduce new astigmatism. Continuous gradual orientation change (e.g., slowly rotating the array along a path) allows the array to gradually adapt to changes in the optical principal axis.

[0061] The embodiment of parallel arrangement along a direction perpendicular to the first direction is considered the preferred basic embodiment because it minimizes interference with the wearer's habitual line of sight. This aligns with the principle of smooth optical performance along the vertical path emphasized in many progressive lens designs. Fine-tuning is then performed based on this principle to address complex local astigmatism distributions. Directional optimization ensures that the microlens array effectively corrects astigmatism without introducing new discomfort. For example, avoiding paralleling the microlens edges with the horizontal line of vision to avoid noticeable linear artifacts; and minimizing any reflection or diffraction effects from the microstructure to directions not sensitive to line of sight. These are all details that require consideration in directional design. Ultimately, through appropriate orientation optimization, the wearer's subjective visual experience can be maximized, ensuring both clear and comfortable vision.

[0062] Optionally, each microlens 103 is a cylindrical microlens or a toric lens.

[0063] Cylindrical microlenses have a cylindrical shape in at least one cross-section, with two orthogonal directions defining a reference system: the power direction and the non-power direction. The power direction runs along the curved length of the lens and is the axis of refractive power; the non-power direction runs along the length of the lens and has no refractive power.

[0064] A toric lens has two surfaces: one toric and one spherical, essentially a combination of a cylindrical and a spherical lens. As light propagates along the toric lens, it refracts to varying degrees due to the varying radii of curvature. This produces two different refractive powers in perpendicular directions, compensating for refractive errors such as astigmatism, allowing light to be focused on the retina for clear imaging.

[0065] Among them, both the cylindrical microlens and the toric lens can be used as compensation lenses to eliminate astigmatism at corresponding positions of the lens body.

[0066] In another embodiment, the surface of each microlens 103 facing away from the lens body 101 is spherical, while the surface of the side adjacent to the lens body 101 has the same shape as the surface of the lens body 101. The surface of the lens body 101 facing away from the microlens 103 is also spherical. This arrangement ensures that both surfaces of the lens at the corresponding position where the microlens 103 is located are spherical, thereby reducing or even eliminating astigmatism at that position.

[0067] Achieving the aforementioned microlens array optimization for progressive lenses places high demands on manufacturing processes. The required microstructure features must be small in size and high in precision. These are typically fabricated using the following techniques.

[0068] Freeform surface machining technology. Modern lenses mostly utilize freeform CNC machining (Freeform Surfacing). For microlens arrays, ultra-precision machining equipment can be used to directly inscribe microstructures on the lens surface. For example, diamond turning combined with Fast Tool Servo technology can produce complex surfaces with nanometer-level smoothness from a single lens blank, including large-scale progressive curves and superimposed small-scale microlens arrays. This method is suitable for prototyping and mold manufacturing. A mold master for the microlens array is first turned onto a metal substrate, and then this mold is used to replicate the lens. This method offers high precision and excellent surface quality (directly achieving optical finish), while one-piece molding eliminates alignment errors.

[0069] For large-scale production, microlens mold manufacturing can be done through compression molding or injection molding. This requires first creating a mold with the microlens array structure. In addition to the aforementioned ultra-precision turning, photolithography and etching techniques can also be used to create microstructured mold inserts.

[0070] For example, semiconductor photolithography processes can be used to create a negative mold (pit array) for a microlens array on a silicon wafer or quartz glass. Grayscale lithography or deep UV lithography, followed by melt-reflow processes, can produce a highly accurate curved microlens array. This master is then used for electroforming to create a rigid nickel mold insert. Laser direct writing or femtosecond laser processing can also be used to directly inscribe the microlens topography onto the mold material, achieving the desired structure. 3D printing (such as two-photon polymerization) can even be used to create a microlens array model and then convert it into a mold. When using molds for lens production, options include injection molding (for thermoplastic materials such as PC and MR series high-refractive-index plastics) or resin casting (for thermosetting resins such as CR-39). Crucially, the mold surface microstructure must possess sufficient hardness and abrasion resistance to withstand tens of thousands of replications without damaging the fine topography. This often requires treatments such as coatings to strengthen the mold.

[0071] In addition to forming the microstructure on the lens itself, direct molding can also involve creating a microlens array as an additional layer, which can then be bonded to the lens body. For example, a UV-curable resin can be used to replicate the microlens array on the surface of an already molded progressive lens. A mold with a microlens array pattern is first attached to the lens surface, then a transparent resin is injected. After UV curing, the mold is peeled off, leaving a cured microstructure film on the lens. This method allows for post-processing of the microarray on the finished lens, enhancing flexibility.

[0072] Similarly, there's hot embossing, where a microstructured template is heated and pressed against the lens surface, causing micro-deformation and imprinting the pattern (suitable for thermoplastic lenses). These direct molding methods offer the advantage of process flexibility, allowing for both localized production and batch production (for example, simultaneously imprinting a large block of material and then cutting it into multiple lenses).

[0073] When implementing this invention, rapid prototyping techniques (such as direct CNC machining of individual lenses or molds) are first used to produce prototypes to verify the effectiveness of the optical design and wearer comfort. Subsequently, mass production processes (such as mold manufacturing and process parameter optimization) are developed as needed. Because new microstructures are integrated into the lens, extensive initial trial production and testing may be required to balance optical performance and process feasibility. Once the parameters are determined, this manufacturing technology can support high-consistency, high-volume production.

[0074] According to another aspect of the present invention, a pair of glasses is provided, comprising the progressive lens according to any embodiment of the present invention.

[0075] This invention alleviates the irreconcilable conflict between diopter and astigmatism in traditional progressive addition lenses by incorporating a microlens array into the lens. By finely controlling the light field, the microlens array significantly reduces the intensity of astigmatism at the lens' periphery, minimizing image distortion and surging effects caused by astigmatism, thereby improving the wearer's visual clarity and dynamic stability. The microlens array acts like a "compound eye" optical system within the lens, dispersing and correcting astigmatism in the field of view, significantly enhancing comfort and adaptability.

[0076] According to the progressive lens and glasses provided by the present invention, the progressive lens comprises: a lens body, and a microlens region located on the lens body, the microlens region comprising a plurality of microlenses, wherein the astigmatism formed by at least one microlens at a position corresponding to the surface of the lens body can offset the astigmatism at the same position on the lens body itself; the microlens region at least covers the astigmatic region of the lens body. Thus, this embodiment of the invention disposes microlenses corresponding to the astigmatism in the portion of the lens body having astigmatism. In this way, the astigmatism of these microlenses can offset the astigmatism of the lens body at the position where they are arranged, thereby substantially eliminating astigmatism when the wearer wears the glasses. Furthermore, even if the wearer turns their head or shakes while wearing the glasses, they will not experience dizziness caused by the surge effect, thereby improving the user experience.

[0077] 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.

[0078] 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 micro-lens area located on the lens body, wherein the micro-lens area includes a plurality of micro-lenses, and the astigmatism formed by at least one of the micro-lenses at a position corresponding to the surface of the lens body can offset the astigmatism at the same position of the lens body itself; The micro lens area at least covers the astigmatism area of ​​the lens body.

2. The progressive lens according to claim 1, wherein: In the astigmatism area, the microlenses are distributed in a closely arranged manner at positions in the lens body where the astigmatism is greater than a preset astigmatism, or the microlenses are distributed in a discrete dot matrix manner at positions in the lens body where the astigmatism is greater than a preset astigmatism.

3. The progressive lens according to claim 1, wherein: The micro lens area also covers the channel side area of ​​the lens body.

4. The progressive lens according to claim 3, wherein: In the channel side area, each of the micro lenses is distributed in a closely arranged manner at a position in the lens body where the astigmatism is greater than a preset astigmatism, or each of the micro lenses is distributed in a discrete dot matrix manner at a position in the lens body where the astigmatism is greater than a preset astigmatism.

5. The progressive lens according to claim 3 or 4, characterized in that: In the area beside the channel, the astigmatism axis of each microlens is perpendicular to a first direction, and there is a continuous smooth transition surface between each microlens, wherein the first direction is the direction from the far vision area to the near vision area of ​​the lens body.

6. The progressive lens according to claim 3, wherein: The micro lens area also covers the distance area and the near area of ​​the lens body; In the distance vision area and the near vision area, the micro lenses are distributed in a discrete dot matrix form at positions in the lens body where the astigmatism is greater than a preset astigmatism.

7. The progressive lens according to any one of claims 1, 3 or 6, characterized in that: In the far vision area and the near vision area, the astigmatism axis of each microlens is parallel to the astigmatism axis at the same position of the lens body itself, and the magnitude of the astigmatism formed by each microlens at the position corresponding to the surface of the lens body is the same as the magnitude of the astigmatism at the same position of the lens body itself, but the positive and negative signs are opposite.

8. The progressive lens according to claim 7, wherein: Each of the micro lenses is a cylindrical micro lens or a toric lens.

9. The progressive lens according to any one of claims 1, 3 or 6, characterized in that: The surface of each micro lens away from the lens body is a spherical surface, the shape of the surface adjacent to the lens body is the same as the surface shape of the lens body, and the surface of the lens body away from the micro lens is a spherical surface.

10. A pair of glasses, characterized in that: The method comprises the progressive lens according to any one of claims 1 to 9.

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