A progressive lens and eyeglasses

Abstract

The application discloses a kind of progressive lenses and glasses, wherein, progressive lenses include: lens body, and micro lens area on lens body, micro lens area includes multiple micro lenses, at least one micro lens is formed at the position of corresponding lens body surface The astigmatism of can be offset with the astigmatism of the same position of lens body itself;Micro lens area at least covers the astigmatism area of lens body. Thus, the embodiment of the application sets up the micro lens of corresponding astigmatism by the part that lens body has astigmatism, so that the astigmatism of these micro lenses itself can offset the self astigmatism of lens body at the arrangement position, so that the wearer is basically no longer present astigmatism when wearing the glasses. Further, even when wearing the glasses, the wearer will not appear the dizziness caused by the surge effect when turning head or shaking, etc., can improve user experience.

Description

Technical Field

[0001] This invention relates to the field of optical technology, and more particularly to a progressive lens and eyeglasses. Background Technology

[0002] Progressive multifocal lenses (PAL) achieve continuous vision for distance, near, and intermediate distances by gradually changing the refractive power of the lens. However, this continuous change in power is accompanied by a serious optical problem: undesirable astigmatism. Because the curvature of the lens surface gradually increases along the perpendicular direction from distance to near vision, according to optical theory, each point will have two principal curvatures in orthogonal directions, resulting in a pair of principal powers, P1 and P2. The surface astigmatism at that point is the difference between the two principal powers. Ideally, while it is desirable for areas outside the central visual axis to be clear, in reality, progressive lenses inevitably produce significant astigmatism in the peripheral areas, creating blurred areas.

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

[0004] This invention provides a progressive lens and eyeglasses to solve the problem in related technologies where astigmatism causes a surge effect, 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, the microlens region comprising a plurality of microlenses, wherein astigmatism formed by at least one of the microlenses at a position corresponding to the surface of the lens body is capable of canceling astigmatism at the same position on the lens body itself.

[0006] The microlens region at least covers the astigmatic region of the lens body.

[0007] Optionally, in the astigmatic region, each of the microlenses is arranged in a close-packed 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 dot matrix discrete manner at a position in the lens body where the astigmatism is greater than a preset astigmatism.

[0008] Optionally, the microlens region also covers the channel-side region of the lens body.

[0009] Optionally, in the area beside the channel, each of the microlenses is arranged in a close-packed 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 dot matrix discrete 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 astigmatic axis of each microlens is perpendicular to the first direction, and there is a continuous and smooth transition surface between each microlens, wherein the first direction is the direction from the far-use area of ​​the lens body to the near-use area.

[0011] Optionally, the microlens region also covers the distance and near vision regions of the lens body.

[0012] Optionally, in the far-field and near-field regions, each of the microlenses is distributed in a discrete dot matrix form at positions in the lens body where the astigmatism is greater than a preset astigmatism.

[0013] Optionally, in the far-field and near-field regions, the astigmatic axis of each microlens is parallel to the astigmatic axis of the lens body at the same position, and the magnitude of the astigmatism formed by each microlens at the corresponding position on the lens body surface is the same as the magnitude of the astigmatism at the same position on the lens body, but opposite in sign.

[0014] Optionally, each of the microlenses is a cylindrical microlens or an annular microlens.

[0015] Each microlens has a spherical surface on the side away from the lens body, and the shape of the surface on the side adjacent to the lens body is the same as the surface shape of the lens body. The surface of the lens body on the side away from the microlens is spherical.

[0016] According to another aspect of the present invention, eyeglasses are provided, comprising progressive lenses as described in any embodiment of the present invention.

[0017] The technical solution of this invention provides a progressive lens and eyeglasses. The progressive lens includes a lens body and a microlens region located on the lens body. The microlens region includes multiple microlenses, and at least one microlens at a position corresponding to the surface of the lens body can cancel out the astigmatism of the lens body itself at the same position. The microlens region at least covers the astigmatism region of the lens body. Therefore, by setting microlenses corresponding to the astigmatism in the portion of the lens body with astigmatism, this invention ensures that if the astigmatism of all the microlenses can cancel out the astigmatism of the lens body itself at the placement position, the wearer will essentially not experience astigmatism when wearing the eyeglasses. Furthermore, even when turning the head or shaking, the wearer will not experience dizziness due to the surging effect, thus improving the user experience.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

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

[0023] Figure 4 This is a schematic diagram of the astigmatism vector distribution of a progressive lens according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the microlens distribution of a progressive lens according to an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] In related technologies, a fundamental principle in progressive lens design is given by Minkwitz's theorem: on both sides of the center of the progressive corridor (the principal power gradient line), the rate of increase in surface astigmatism in the lateral direction is approximately twice the rate of increase in power in the vertical direction. Simply put, if the power increases by 1mm along the vertical corridor, for example, +0.25D, then astigmatism inevitably appears in the horizontal direction at approximately twice the rate of this increase. This theorem determines the lower limit of the astigmatism-power distribution; therefore, traditional designs cannot reduce peripheral astigmatism to zero and can only distribute it through compromises at various points. Modern PAL designs typically control the maximum astigmatism to an order of magnitude close to the added power; for example, a lens with a +2.00D added power usually has a maximum astigmatism of around 2.00D. This means that when the wearer views objects through the periphery of the lens, it is equivalent to having an additional cylindrical distortion of about 2 diopters superimposed, which is the root cause of visual blurring and distortion.

[0028] Peripheral blurring and distortion caused by astigmatism can lead to decreased dynamic vision. Linear distortion (known as tilt distortion) makes images no longer orthogonal, and symmetrical objects appear distorted. More importantly, when the head or eyes move, the prismatic effect and differences in magnification in different visual zones cause inconsistent changes in the position and size of the image, creating a "wobbling" sensation. Wearers may feel objects moving faster or slower, causing dizziness. These effects can significantly prolong the adaptation time to new lenses and may even be intolerable for some sensitive individuals. Therefore, reducing the intensity of peripheral astigmatism and mitigating the surging effect in progressive lenses are key issues for improving visual quality and wearer comfort.

[0029] The progressive lenses and eyeglasses proposed in this invention, illustrated in the accompanying drawings, achieve a smooth transition between near, intermediate, and far-field power while minimizing unwanted astigmatism, thereby eliminating visual interference caused by "swimming" distortion as much as possible. Ideally, this allows the wearer to obtain a stable and clear field of vision whether observing at rest or in motion.

[0030] Figure 1This is a schematic diagram of the structure of a progressive lens according to an embodiment of the present invention. Figure 1 As shown, the progressive lens 100 includes: a lens body 101, and a microlens region 102 located on the lens body 101. The microlens region 102 includes a plurality of microlenses 103. At least one microlens 103 at a position corresponding to the surface of the lens body 101 forms astigmatism that can cancel out astigmatism at the same position on the lens body 101 itself. The microlens region 102 at least covers the astigmatism region 104 of the lens body 101.

[0031] Among them, reference Figure 1 The lens body 101 includes a distance vision area 105, a channel vision area, and a near vision area 107. The channel vision area is also known as the transition area between the distance vision area 105 and the near vision area 107. The channel vision area refers to the line connecting the distance and near vision points. This part has virtually no astigmatism. Astigmatism is more likely to form on the sides of the channel vision area, namely the channel-side areas 106. Furthermore, from the channel-side areas 106 along a direction perpendicular to the channel, the closer to the edge of the lens, the more likely astigmatism area 104 is to form. When the wearer wants to look into the distance, they use the distance vision area 105; when the wearer wants to look at near objects, they use the near vision area 107. This allows for simultaneous correction of both distance and near vision using the same lens. However, when the wearer frequently switches between the distance vision area 105 and the near vision area 107, or shakes their head left or right, the change in lens power and the astigmatism generated by the astigmatism area 104 can cause the wearer to experience a swaying sensation in the surrounding scenery, resulting in dizziness. In this embodiment of the invention, by setting a microlens region 102 in the astigmatic region 104, at least one microlens 103 in the microlens region 102 has astigmatism that is different from the astigmatism at the arrangement position, thereby canceling the astigmatism at the arrangement position. This allows the wearer to clearly see the surrounding scenery without dizziness when switching between the distance viewing area 105 and the near viewing area 107.

[0032] Figure 2 This is a schematic diagram of the refractive power distribution of a progressive lens according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the astigmatism distribution of a progressive lens according to an embodiment of the present invention. Figure 2 As can be seen, the refractive power in the distance region 105 is less than that in the channel region, and the refractive power in the channel region is less than that in the near region 107. Blue represents the distance region 105, and red represents the near region 107. A transition area separates the two regions. To minimize abrupt changes between the distance region 105 and the near region 107, the refractive power in the transition area is finely divided for a gradual change. Figure 3 China Figure 2 A schematic diagram of astigmatism obtained from the lens. Figure 3The lighter the blue, the more severe the astigmatism; the darker the blue, the milder the astigmatism. From... Figure 3 As can be seen, the astigmatism is most severe in astigmatic region 104, with a maximum astigmatism of 1.95D. While astigmatism exists in distant viewing region 105 and near viewing region 107, it is not as severe as in astigmatic region 104. Therefore, in this embodiment of the invention, at least a microlens region 102 needs to be arranged in astigmatic region 104 to make the part with the most severe astigmatism clear. In other embodiments, microlens regions 102 can also be arranged in other astigmatic regions to eliminate astigmatism of the lens body 101 to the greatest extent.

[0033] Figure 4 This is a schematic diagram of the astigmatism vector distribution of a progressive lens according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the microlens distribution of a progressive lens according to an embodiment of the present invention. Figure 4 This shows the magnitude and direction of each astigmatism within the lens body 101. It is understandable that... Figure 4 The astigmatic distribution in the image can be obtained through Figure 2 The distribution of refractive power and Minkwitz's theorem are used to derive this. Specifically, the magnitude of surface astigmatism at any point on the asymptotic surface can be expressed as the difference in focal power produced by the two principal curvatures at that point. Furthermore, changes in refractive power in the vertical direction will exponentially increase astigmatism in the horizontal direction. Therefore, it is possible to... Figure 4 To address astigmatism, micromirrors 103 in micromirror region 102 are arranged (e.g., Figure 5 As shown in the diagram, at least one microlens 103, once arranged, can counteract astigmatism at that location on the lens body 101. This allows the wearer to clearly see their surroundings, thereby improving wearing comfort.

[0034] If the magnitude of the astigmatism of each microlens 103 is the same as, but opposite in sign to, the magnitude of the astigmatism at that location on the lens body 101, and the direction of the astigmatism is the same, then all the astigmatism on the lens body 101 can be canceled out. However, there may be certain difficulties in the manufacturing process. Therefore, the above arrangement can be carried out in areas with larger astigmatism, while in areas with smaller astigmatism, for ease of manufacturing implementation, 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 region 104, each microlens 103 is arranged in a close-packed 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 dot matrix discrete manner at a position in the lens body 101 where the astigmatism is greater than a preset astigmatism.

[0036] Astigmatism below a preset value is generally not easily perceived by the human eye, thus correction is performed above the preset value. The preset value can be +1.00D. In this embodiment, the microlenses 103 in the microlens region 102 can be arranged in two ways: one is a closely spaced arrangement of microlenses 103, and the other is a discretely arranged arrangement of microlenses 103.

[0037] It should be noted that the closely packed microlenses 103 refer to the optimization achieved by introducing a microlens array structure into specific areas of the 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 eyes of an insect. Integrating this array onto the surface of the progressive lens is equivalent to discretizing the originally continuous optical surface into multiple small lenses. By designing the optical characteristics of each microlens 103, astigmatic errors can be corrected or offset locally, thereby smoothing the overall astigmatic distribution. The introduction of the microlens array has two main purposes: first, to reduce the peak and range of surface astigmatism, i.e., to reduce peripheral blur; second, to reduce the surge effect, i.e., to make the image distortion in the field of vision more stable and controllable when the eye passes through different areas, preventing sudden acceleration of "drift". Through the redistribution of light by the microlenses 103, a more uniform optical astigmatic distribution can be achieved, making it easier for the wearer to adapt. The microlens array can be regarded as a special optical "compensator" superimposed on the lens surface.

[0038] Each microlens 103 (typically 0.8~3mm in size) exerts a certain convergence and divergence effect on the light passing through that area. The microlens 103 can provide astigmatism opposite to that of the original freeform surface. For example, if a point on the original surface has +1.00D astigmatism, the microlens 103 can introduce a local cylinder effect of -1.00D to cancel it out, where the astigmatic axis of the microlens 103 coincides with the astigmatic axis of the lens body. In this way, the wavefront of the final outgoing light is closer to the ideal state. Furthermore, due to the small size and dense arrangement of the microlenses 103, when the human eye looks in a certain direction, multiple microlenses 103 often pass through simultaneously. These units work together to form multiple slightly offset tiny images on the retina. These images are integrated by the brain, equivalent to an "averaging" effect that extends the depth of field or reduces astigmatic blur. This is similar to averaging through multiple channels to reduce the impact of distortion in a single channel.

[0039] Furthermore, by appropriately 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 region between the distance viewing area 105 and the near viewing area 107, astigmatism is originally most severe, and the visual "dead zone" is the largest. If a microlens array is implanted in this region to locally smooth the optical power gradient, the difference in optical performance between different viewing areas can be reduced, making the transition smoother. Some novel multi-segment / multi-aperture optical designs can provide better image quality under dynamic visual conditions. Furthermore, optimizing the progressive lens with a compound eye microlens array will significantly reduce undesired astigmatism and the resulting surge distortion, thereby improving visual clarity and shortening adaptation time. In the case of a close arrangement, other tiling methods are also possible, such as square grids or concentric rings.

[0040] Discretely arranged microlenses 103 refer to a small number of microlenses 103 embedded in a dot matrix pattern in high astigmatism regions, spaced apart to form a discrete distribution. Each microlens 103 can be considered an independent "correction island," providing astigmatism compensation only in the covered local area, while the uncovered gap areas retain 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, regions with astigmatism ≥1.00D can be selected, and microlenses 103 with a diameter of 1–2 mm can be arranged at certain intervals. The advantage of discrete arrangement is that it minimizes interference with the main visual axis and the clear area, maintaining the original optical performance of most of the field of view; at the same time, because the microlenses 103 are discontinuous, astigmatism compensation is mainly limited to the local area, making it less likely to produce large-scale diffraction or artifacts.

[0041] The close arrangement allows for full coverage of the target area, eliminating visual distinctions between clear areas and the microlenses 103, thus avoiding the uneven field of view that may occur with discrete arrangements. The discrete arrangement, on the other hand, can compensate for the most severe astigmatism, saving costs. The arrangement can be selected based on the distribution of astigmatism within the astigmatism region 104.

[0042] Optionally, the microlens region 102 also covers the channel-side region 106 of the lens body 101.

[0043] It should be noted that the microlens region 102 is arranged not only in the astigmatic region 104 but also in the channel-side region 106. This is because the astigmatic region 104 must contain the microlens region 102, and the astigmatism is strongest in the astigmatic region 104; therefore, the microlens region 102 can significantly alleviate the surging effect caused by astigmatism. However, in the channel-side region 106, the transition between the distant viewing region 105 and the near viewing region 107 also causes some astigmatism. Therefore, placing the microlens region 102 in the channel-side region 106 can further alleviate the surging effect caused by astigmatism.

[0044] In the arrangement of microlens region 102, the direction and intensity of astigmatism of microlens 103 in astigmatism region 104 can be opposite to the direction of astigmatism at the same position on lens body 101, but with the same intensity. Microlenses 103 can be regularly arranged (closely arranged or discretely arranged) in channel-side region 106.

[0045] Optionally, in the channel-side region 106, each microlens 103 is arranged in a close-packed 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 dot matrix discrete 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 level is not easily perceived by the human eye, thus correction is performed above the preset astigmatism level. The preset astigmatism can be +1.00D. In this embodiment, the microlenses 103 in the microlens region 102 can be arranged in two ways: one is a closely packed arrangement of microlenses 103, and the other is a discrete arrangement of microlenses 103. It is understood that the closely packed or discrete arrangement can be referred to the previous description, and will not be repeated here. Among them, different arrangement methods have different focuses. The discrete arrangement can maintain the original optical properties of the lens as the main focus and compensate locally; the closely packed type (compound eye type) pursues comprehensive correction to reduce astigmatism and surge more significantly. In practice, depending on the astigmatism distribution, even a combination of methods can be used (for example, using a honeycomb array in the main high astigmatism area and a discrete dot array in the edge transition area) to balance visual quality and comfort.

[0047] For example, microlenses 103 can be arranged in a close arrangement in both the astigmatic region 104 and the channel-side region 106, or in a discrete arrangement in both. Alternatively, microlenses 103 can be arranged in a close arrangement in the astigmatic region 104 and in a discrete arrangement in the channel-side region 106, or microlenses 103 can be arranged in a discrete arrangement in the astigmatic region 104 and in a close arrangement in the channel-side region 106.

[0048] Optionally, within the channel-side region 106, the column axis of each microlens 103 is perpendicular to the first direction, and each microlens 103 has a continuous and smooth transition surface, wherein the first direction x is the direction from the far-use region 105 of the lens body 101 to the near-use region 107.

[0049] It is important to note that the surge effect is closely related to astigmatism and prism power gradient. When the eye moves to the peripheral region, different optical powers and the prism effect of the substrate 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, making the change in luminance within each cell slower, while the total change across cells is distributed. In this way, as the line of sight sweeps across the lens, the changes in luminance and prism are completed in multiple stages, rather than changing rapidly on a continuous surface, thus reducing the peak rate of change. According to the progressive lens design principle, reducing the rate of change of luminance / prism in the vertical and horizontal directions can mitigate image shakiness.

[0050] In this embodiment, by arranging microlenses 103, the light intensity that was originally concentrated in a certain area is dispersed across multiple microlenses 103 in a gradual transition, similar to dividing a steep slope into steps. Therefore, the "acceleration" of the image perceived by the wearer is greatly mitigated. In addition, since the microlens array may cause the human eye to see multiple slightly offset images simultaneously, these images are fused in the brain, which is equivalent to expanding the depth of field in the human eye's vision. This effect means that the eye's focusing sensitivity is reduced, and slight diopter errors or astigmatism are less easily detected, thus reducing the dizziness caused by the surge.

[0051] For example, by introducing microlenses 103 in a horizontal strip direction, where the cylindrical microlenses of the microlenses 103 primarily operate in the horizontal direction, vertical diopter variations can be controlled more effectively. For instance, the progressive corridor region can be divided into several strips along a horizontal strip, with narrow microlenses 103 (long axis laterally) arranged on each strip. These microlenses 103 provide localized focusing / divergence in the vertical direction, replacing a portion of the diopter gradient provided by the original continuous surface. Since each horizontal strip itself provides a complete diopter transition from far to near, a more gradual vertical diopter gradient can be achieved, thereby reducing the rate of diopter change in the vertical direction, which helps reduce the vertical surge effect. However, this lateral arrangement creates a distinct strip-like area, and when the eye moves up and down across different strips, the perceived diopter change may occur at the strip boundaries. If not handled properly, this can result in a slight "jump" sensation, similar to a hybrid experience of traditional progressive lenses and bifocal lenses. Therefore, it is necessary to smooth this boundary by optimizing the transition between the microlens 103 bands (for example, by making the optical properties of the microlens 103 of adjacent bands slightly overlap, or by using mathematical methods to make the surfaces of the two units gradually transition and merge in the boundary region).

[0052] Furthermore, although the surfaces between individual micromirrors in the micromirror array are made to transition as smoothly as possible, they still have ridges formed by connecting lines, meaning the overall surface of the mirror is not perfectly smooth. This creates a multi-pupil effect, which can, to some extent, bypass the smooth, continuous surface limitation in Minkwitz's theorem, thus solving the astigmatism caused by smooth surfaces under Minkwitz's theorem. This embodiment reduces astigmatism and surge distortion through the optical surface formed by the micromirror array, simultaneously reducing static astigmatic blur and dynamic surge distortion.

[0053] Optionally, the microlens region 102 also covers the distance vision region 105 and the near vision region 107 of the lens body 101.

[0054] The microlens region 102 can be located only in the astigmatism region 104, or in the astigmatism region 104 and the channel-side region 106, or in the astigmatism region 104, the distance viewing region 105, the near viewing region 107, and the channel-side region 106. Whether a microlens 103 is provided in a certain region of the lens body 101 depends on the degree of astigmatism in that region. The greater the degree of astigmatism, the more necessary it is to provide a microlens 103, and vice versa. In this embodiment, microlenses 103 are provided throughout the lens body 101 to eliminate astigmatism of the lens body 101 to the greatest extent.

[0055] Optionally, in the far-field region 105 and the near-field region 107, each microlens 103 is distributed in a dot matrix discrete form at positions in the lens body 101 where the astigmatism is greater than a preset astigmatism.

[0056] Since the astigmatism in the far-field region 105 and the near-field region 107 is less than that in the channel-side region 106 and the astigmatism region 104, and the astigmatism density is lower, the microlenses 103 can be arranged in a dot matrix discrete form.

[0057] It is understandable that microlenses 103 can be arranged discretely in all areas of the lens body 101, or they can be arranged closely in the astigmatic region 104 and the channel-side region 106, and discretely in the distance region 105 and the near region 107. Thus, when arranged in the latter manner, the degree of scattering reduction that can be achieved in the astigmatic region 104 and the channel-side region 106 is greater than the degree of astigmatism reduction that can be achieved in the distance region 105 and the near region 107.

[0058] Optionally, in the far-field region 105 and the near-field region 107, the astigmatic axis direction of each microlens 103 is parallel to the astigmatic axis direction at the same position on the lens body 101 itself, and the magnitude of the astigmatism formed by each microlens 103 at the corresponding position on the surface of the lens body 101 is the same as the magnitude of the astigmatism at the same position on the lens body 101 itself, but opposite in sign.

[0059] Understandably, while arranging microlenses 103 can compensate for some of the astigmatism on the lens body 101, considering that the axis of astigmatism around the progressive lens is not uniform but changes with position (usually distributed along a gradually rotating oblique axis), in a preferred embodiment, microlenses with different orientations can be used in different areas. That is, the optical axis of the microlens 103 is locally aligned with the principal axis direction of the original astigmatism at that location to achieve the most effective compensation. For example, in the upper, nose-side region, the astigmatism axis may be about 45°, so a microcylindrical lens with an axis of 45° is arranged to compensate; while in the lower, ear-side region, the axis is close to 135°, so a lens with an axis of 135° is arranged there. In this way, each microlens 103 is "tailor-made" to specifically correct the astigmatism at that location. In this embodiment, the curvature and angle of each microlens 103 can be customized. This local anisotropic correction, because it perfectly matches the original astigmatism distribution in space, will optimize astigmatism correction and surge control.

[0060] In a preferred embodiment, the microlens 103 can be arranged with their principal axes parallel to the principal meridians (i.e., horizontally; in other embodiments, they can also be arranged vertically), supplemented by small local angle adjustments. For example, the microlens array is generally arranged horizontally with the astigmatic axis as its horizontal direction to ensure a smooth macroscopic transition; however, in areas with particularly strong astigmatism, some microlenses 103 can be slightly rotated to more accurately align with the astigmatic axis, thereby improving correction efficiency. Simultaneously, the orientation of the microlenses 103 is allowed to change slowly in space, introducing new astigmatism. Continuous gradual changes in orientation (e.g., slowly rotating the array direction along a certain path) allow the array to gradually adapt to changes in the optical principal axis.

[0061] Embodiments arranged parallel to the first direction are considered the preferred basic embodiment due to minimal interference with the wearer's habitual visual movement. This aligns with the principle emphasized in many progressive lens designs that "optical performance should be smooth along the vertical channel." Further fine-tuning is then applied to address complex local astigmatism distributions. Orientation optimization ensures that the microlens array effectively corrects astigmatism without introducing new discomfort. For example, avoiding parallel alignment of microlens edges with the horizontal line of vision to prevent noticeable linear artifacts; and minimizing any reflections or diffractions from the microstructure in non-line-of-sight-sensitive directions. These are details that need to be considered in orientation design. Ultimately, through reasonable orientation optimization, the wearer's subjective visual experience can be maximized, ensuring both "clear vision" and "comfortable vision."

[0062] Optionally, each microlens 103 is a cylindrical microlens or an annular microlens.

[0063] A cylindrical microlens has a cylindrical shape in at least one cross-section, and its two orthogonal directions define a reference system: the power direction and the non-power direction. The power direction extends along the curvature of the lens and is the axis with refractive power; the non-power direction extends along the length of the lens and has no refractive power.

[0064] An allotral lens has two surfaces, one torus and one spherical, essentially a combination of a cylindrical lens and a spherical lens. When light travels along different directions of the allotral lens, the light is refracted to varying degrees due to the different radii of curvature in those directions. This results in different refractive forces in two mutually perpendicular directions, compensating for refractive errors such as astigmatism in the human eye, allowing the light to focus on the retina and achieve a clear image.

[0065] Among them, cylindrical microlenses and torus lenses can both be used as compensating lenses to eliminate astigmatism at corresponding positions on the lens body.

[0066] In another embodiment, the surface of each microlens 103 away from the lens body 101 is spherical, and the shape of the surface of the microlens 103 adjacent to the lens body 101 is the same as the surface shape of the lens body 101. The surface of the lens body 101 away from the microlens 103 is spherical. This arrangement ensures that both sides of the corresponding position of the lens where the microlens 103 is located are spherical, which can reduce or even eliminate astigmatism at that position.

[0067] The progressive lenses that achieve the aforementioned optimization of the microlens array place high demands on the manufacturing process. The required microstructural features must be small in size and high in precision. They are generally manufactured using the following processes.

[0068] Freeform surface machining technology is widely used in modern lenses. For microlens arrays, ultra-precision machining equipment can be used to directly etch microstructures onto the lens surface. For example, diamond turning combined with Fast Tool Servo technology can machine complex surfaces with nanoscale smoothness on a single lens blank, including large-scale progressive surfaces and stacked small-scale microlens arrays. This method is suitable for prototyping and mold making. A master mold of the microlens array is first machined onto a metal substrate, and then the lens is replicated using this mold. This method offers high precision, excellent surface quality (achieving optical finish directly), and the one-piece molding eliminates alignment errors.

[0069] For large-scale production, microlens mold manufacturing can utilize compression molding or injection molding processes, which require first creating a mold with a microlens array structure. In addition to ultra-precision turning, photolithography and etching techniques can also be used to fabricate microstructure mold inserts.

[0070] For example, semiconductor photolithography can be used to create a reverse mold (dimple array) of a microlens array on a silicon wafer or quartz glass. Highly accurate microlens surface arrays can be formed through grayscale or deep UV photolithography, followed by melt-reflow processes. This mold is then used as a master for electroforming to create a rigid nickel mold insert. The desired structure can also be obtained by directly engraving the microlens morphology onto the mold material using laser direct writing or femtosecond laser processing. Furthermore, 3D printing (such as two-photon polymerization) can be used to first create a microlens array model, which can then be replicated into a mold. When using molds for lens production, injection molding (for thermoplastic materials such as PC and MR series high refractive index plastics) or resin casting (such as thermosetting resins like CR-39) can be chosen. The key is that the microstructure on the mold surface must have sufficient hardness and wear resistance to withstand tens of thousands of replications without damaging the fine morphology. This often requires mold strengthening treatments such as coating.

[0071] Direct molding processes, besides molding microstructures onto the lens body, can also consider manufacturing microlens arrays as an additional layer and then bonding them to the lens body. For example, a microlens array can be replicated on the surface of a pre-molded progressive lens using UV-cured resin: first, a mold with a microlens array pattern is attached to the lens surface, transparent resin is injected, and after UV curing, the mold is peeled off, thus forming a cured microstructure film on the lens. This method allows for post-processing of the microarray on the finished lens, improving flexibility.

[0072] Similarly, there is thermoforming, which involves heating and pressing a template with microstructures onto the lens surface to cause micro-deformation and imprint an array (suitable for thermoplastic lenses). The advantage of these direct molding methods is their flexibility; they can be used for localized production or batch parallel production (e.g., simultaneously imprinting a large piece of material and then cutting it into multiple lenses).

[0073] In implementing this invention, rapid prototyping methods (such as direct CNC machining of single lenses or molds) are first used to create prototypes to verify the effectiveness of the optical design and wearing comfort. Subsequently, mass production processes (mold manufacturing, process parameter optimization, etc.) are developed as needed. Since it involves integrating new microstructures into the lens, a significant amount of trial production and testing may be required in the early stages 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, eyeglasses are provided, comprising progressive lenses as described in any embodiment of the present invention.

[0075] This invention alleviates the irreconcilable conflict between refractive power and astigmatism in traditional designs by introducing a microlens array into progressive multifocal lenses. Through the precise control of the light field by the microlens array, the intensity of astigmatism at the lens periphery can be significantly reduced, minimizing image distortion and surge effects caused by astigmatism, thereby improving the wearer's visual clarity and dynamic stability. The microlens array is like constructing a "compound eye" optical system on the lens, dispersing and correcting astigmatism in the field of vision, greatly enhancing comfort and adaptability.

[0076] According to the progressive lens and eyeglasses provided by the present invention, the progressive lens includes: a lens body, and a microlens region located on the lens body. The microlens region includes a plurality of microlenses, and at least one microlens at a position corresponding to the surface of the lens body forms astigmatism that can cancel out the astigmatism of the lens body itself at the same position. The microlens region at least covers the astigmatism region of the lens body. Therefore, by providing microlenses corresponding to astigmatism in the astigmatic portion of the lens body, the astigmatism of these microlenses can cancel out the astigmatism of the lens body itself at the arrangement position, thereby virtually eliminating astigmatism for the wearer when wearing the eyeglasses. Furthermore, even when turning the head or shaking, the wearer will not experience dizziness due to the surging effect, thus improving the user experience.

[0077] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0078] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A progressive lens, characterized in that, The progressive lens comprises: a lens body and a micro-lens region on the lens body, the micro-lens region comprising a plurality of micro-lenses, at least one of the micro-lenses being capable of forming an astigmatism at a position corresponding to a surface of the lens body, the astigmatism being capable of being cancelled by an astigmatism at the same position of the lens body itself; the micro-lens region covering at least an astigmatic region of the lens body; a transition region between a far vision region and a near vision region of the lens body comprising a passage region of the lens body; two sides of the passage region comprising passage-side regions of the lens body; the passage-side regions being regions of the lens body in which the astigmatism is formed close to the edge of the lens body in a direction perpendicular to the passage; in the passage-side regions, the astigmatic axes of the micro-lenses are perpendicular to a first direction, the first direction being a direction of the lens body from the far vision region to the near vision region, and the micro-lenses have a continuous and smooth transition surface between them, and the plurality of micro-lenses are arranged in horizontal bands in the astigmatic region of the lens body; the micro-lens region also covering the passage-side regions of the lens body.

2. The progressive lens according to claim 1, wherein in the astigmatic region, the micro-lenses are distributed in a close arrangement in positions of the lens body in which the astigmatism is greater than a predetermined astigmatism, or the micro-lenses are distributed in a dot-matrix discrete arrangement in positions of the lens body in which the astigmatism is greater than a predetermined astigmatism.

3. The progressive lens of claim 1, wherein, in the passage-side regions, the micro-lenses are distributed in a close arrangement in positions of the lens body in which the astigmatism is greater than a predetermined astigmatism, or the micro-lenses are distributed in a dot-matrix discrete arrangement in positions of the lens body in which the astigmatism is greater than a predetermined astigmatism.

4. The progressive lens of claim 1, wherein, the micro-lens region also covering the far vision region and the near vision region of the lens body; in the far vision region and the near vision region, the micro-lenses are distributed in a dot-matrix discrete arrangement in positions of the lens body in which the astigmatism is greater than a predetermined astigmatism.

5. The progressive lens of any one of claims 1 or 4, wherein, in the far vision region and the near vision region, the astigmatic axes of the micro-lenses are parallel to the astigmatic axes at the same positions of the lens body itself, and the astigmatism formed by the micro-lenses at positions corresponding to a surface of the lens body is equal in magnitude and opposite in sign to the astigmatism at the same positions of the lens body itself.

6. The progressive lens of claim 5, wherein, each of the micro-lenses is a cylindrical micro-lens or a toric lens.

7. The progressive lens of any one of claims 1 or 4, wherein, each of the micro-lenses has a spherical surface on a side surface of the micro-lens facing away from the lens body, and a side surface of the micro-lens adjacent to the lens body has the same shape as a surface of the lens body, and a side surface of the lens body facing away from the micro-lens is spherical.

8. Eyeglasses, characterized in that, The progressive lens comprises the lens according to any one of claims 1 to 7.

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