Lens manufacturing method and system, progressive lens, and repair method

Abstract

Provided in the present invention are a lens manufacturing method and system, a progressive lens, and a repair method. A photoresist is coated on a lens substrate; and a preset micro-nano structure is photolithographed on the lens substrate by means of a photopolymerization reaction between laser light emitted by a laser system and the photoresist so that a lens having a micro-nano structure with a preset layout is obtained, wherein the lens achieves a required refractive index distribution by means of the micro-nano structure with a preset layout. The present invention provides processing capability with higher precision, a smoother transition between refractive indices, and higher design and manufacturing flexibility, thereby meeting market demand for a high-quality progressive lens. The high-precision progressive lens manufacturing method provided in the present invention is a solution proposed with respect to the limitations of a traditional process and aims to improve the optical performance of progressive lenses and the visual experience of users.

Description

Lens manufacturing method and system, progressive lens, repair method TECHNICAL FIELD

[0001] The present application relates to the technical field of lens manufacturing, in particular to a lens manufacturing method and system, a progressive lens, and a repair method. BACKGROUND

[0002] A progressive lens is a multi-focal lens, as the name implies, with multiple focal points on one lens. Through multi-focal design, it meets the visual needs of the wearer at different eye distances (near→medium→far) and different eye environments. It is widely welcomed because it can provide a seamless visual experience from near to far distance. Patent document CN113334649A discloses a machine manufacturing method for an arc-shaped progressive lens with full field of view, comprising: first step: fixing the center of the ground to the outside of the mold, so that the auxiliary secondary mold is attached to the original mother mold; second step: grind the required curvature by drawing a circle with the secondary mold with increasing radius, the grinding range includes the original mother mold; third step: take the center of the secondary mold as the center point, and grind and carve within the radius range of the secondary mold.

[0003] However, such traditional progressive lens manufacturing processes face various limitations, mainly in the following aspects:

[0004] 1. Limitations in processing precision:

[0005] Traditional progressive lenses are mainly manufactured through mechanical grinding and polishing processes, which are difficult to achieve micron-level or nanometer-level processing precision. Therefore, there are limitations in the highly fine-tuned optical performance of the lenses, especially in achieving complex refractive index distribution.

[0006] 2. Inadequate smoothness of refractive index transition:

[0007] Due to the limitations of processing technology, the refractive index changes between different viewing zones of traditional progressive lenses are often not smooth enough, resulting in users experiencing visual mutations or discomfort when transitioning from near-distance viewing to far-distance viewing.

[0008] 3. Lack of flexibility in design and manufacturing:

[0009] Traditional processes are often limited by physical grinding processes when designing and manufacturing progressive lenses, which limits the freedom and innovation of lens design. Especially for personalized design of progressive lenses, existing technologies are difficult to meet the needs in terms of cost and efficiency.

[0010] 4. Low material utilization and cost issues:

[0011] Mechanical grinding and polishing not only take a long time to process, but also cause a large amount of material loss, especially when manufacturing lenses of high refractive index materials, the cost is relatively high. In addition, this processing method also involves environmental pollution and other problems.

[0012] 5. User customization needs are difficult to meet:

[0013] With the increasing demand for personalized lens design, the user's demand for visual quality is increasing. However, the traditional process has limitations in meeting user customization needs, especially in accurately adjusting the optical performance of the lens to adapt to specific vision conditions.

[0014] SUMMARY

[0015] In view of the defects in the prior art, the purpose of the present application is to provide a lens manufacturing method and system, a progressive lens, a detection system and a repair method.

[0016] According to the lens manufacturing method provided by the present application, the method comprises:

[0017] coating photoresist on the lens substrate;

[0018] photopolymerization of the laser emitted by the laser system and the photoresist to photoetch the preset micro-nano structure on the lens substrate, to obtain a lens with a preset layout of micro-nano structure, and the lens realizes the required refractive index distribution through the preset layout of micro-nano structure.

[0019] Further, the photoresist is a photoresist with two-photon absorption characteristics, and the photoetching is two-photon photoetching.

[0020] The refractive index of the photoresist is between 1.5 and 1.9;

[0021] The thickness of the photoresist coating is greater than or equal to 100 nm;

[0022] The coating method of the photoresist includes spin coating, drop coating or spraying.

[0023] Further, before coating the photoresist, the surface of the lens substrate is pretreated, and the pretreatment includes cleaning, degreasing or surface activation.

[0024] After coating the photoresist, the coated photoresist is pre-cured, and the pre-curing method includes heat treatment to volatilize the photoresist, and the volatilization amount is less than or equal to 40%.

[0025] After photoetching, the surface of the lens substrate is post-treated, and the post-treatment includes removing the remaining photoresist on the lens substrate, adding an anti-reflection coating, adding a waterproof coating, or optical performance detection.

[0026] Further, the minimum feature size of the micro-nano structure is 50 nanometers.

[0027] At least two micro-nano structures with different optical properties are obtained on the same lens substrate by coating photoresist with different refractive index and then performing photopolymerization.

[0028] According to the present application, a progressive lens is provided, which comprises a lens and a micro-nano structure formed on the lens by photopolymerization. The micro-nano structure with a preset layout achieves the desired refractive index distribution.

[0029] Further, the micro-nano structure comprises an optical waveguide or an optical antenna.

[0030] The micro-nano structure is designed to modulate the polarization state of light passing through the lens to provide polarization modulation function; or the micro-nano structure is designed to achieve temperature response function of the lens, by changing the state of temperature-sensitive material inside the lens to adjust the optical properties of the lens.

[0031] Further, the surface of the progressive lens has a scratch-resistant coating, an ultraviolet-resistant coating, a blue light-resistant coating, a super-hydrophobic coating or a super-oleophobic coating.

[0032] Further, the minimum feature size of the micro-nano structure is 50 nanometers.

[0033] The lens has one or more micro-nano structures with optical properties.

[0034] According to the present application, a lens manufacturing system is provided, which comprises a femtosecond laser, a focusing optical system, a three-dimensional moving platform and a photoresist feeding device, and software for designing and simulating micro-nano structures.

[0035] The three-dimensional moving platform is configured to load, move and rotate the lens substrate.

[0036] The photoresist feeding device is configured to coat photoresist on the lens substrate.

[0037] The femtosecond laser is configured to perform photolithography on the lens substrate coated with photoresist according to the micro-nano structure pattern provided by the software, to obtain micro-nano structures corresponding to the micro-nano structure pattern on the lens substrate, and to achieve the desired refractive index distribution through the micro-nano structure.

[0038] The focusing optical system is configured to control the scanning speed and focal length of the laser emitted by the femtosecond laser.

[0039] According to the present application, a lens repair method is provided, which comprises using the lens manufacturing method to locally repair the damaged micro-nano structure on the lens.

[0040] Compared with the prior art, the present application has the following beneficial effects:

[0041] 1. Precise optical performance control: The present application enables the formation of micro-nano structures within progressive lenses with precision to the nanometer level. This level of fine control allows for more precise adjustments in refractive index, greatly improving the optical performance of the lenses. Users can experience smooth visual transitions from near to far when using these lenses, reducing visual discomfort caused by refractive index discontinuity.

[0042] 2. Improved visual quality: By precisely controlling the internal structure of the lenses, visual distortion and astigmatism can be effectively reduced, especially in the transition area of progressive lenses. This means that users can achieve clearer and more stable visual experiences when switching between viewing distances, improving the overall visual quality of progressive lenses.

[0043] 3. Highly customized design capability: Using two-photon micro-nano processing technology, personalized progressive lenses can be customized according to the specific vision needs and usage habits of users. This highly customized capability allows each user to have the most suitable progressive lenses for themselves, significantly improving the adaptability to specific work environments and the comfort of daily life.

[0044] 4. Extended lens functionality: The present application not only optimizes the optical performance of the lenses, but also increases the additional functions of the lenses by selecting photoresist materials with specific functions, such as UV protection and blue light filtering. The expansion of these functions further enhances the practical value of progressive lenses and the user experience.

[0045] 5. Environmental protection and cost-effectiveness: Compared with traditional physical grinding and polishing methods, the application of two-photon micro-nano processing technology greatly reduces material waste and production costs. At the same time, this dry processing process reduces the generation of chemical waste, is environmentally friendly, and meets the concept of green manufacturing.

[0046] 6. Enhanced durability and stability: Two-photon micro-nano processing technology can form stable micro-nano structures inside the lenses, which have high resistance to temperature changes and physical wear. Therefore, progressive lenses manufactured using this technology may have a longer service life and better durability compared to traditional lenses.

[0047] 7. Improved anti-reflection and anti-fog performance: By designing specific micro-nano structures, an efficient anti-reflection layer can be formed on the surface of the lenses, reducing light scattering and reflection, thereby improving light transmission and clarity. In addition, these structures can also help control the condensation of moisture, thereby having anti-fog effects.

[0048] 8. Rapid response manufacturing process: Compared with traditional manufacturing processes, two-photon micro-nano processing technology can realize rapid conversion from design to finished product, shorten the product development cycle. This feature is especially suitable for scenarios that require rapid iteration and personalized production.

[0049] 9. No need for expensive molds and equipment: Unlike traditional lens production methods that rely on specific molds, the flexibility of two-photon micro-nano processing technology allows for switching between different designs without additional mold or equipment changes, reducing production costs and improving manufacturing efficiency.

[0050] 10. Multi-functional integrated design: Using two-photon micro-nano processing technology, multiple functions such as focusing, filtering, self-repairing, etc. can be integrated into a single lens, enabling innovative product designs that meet the needs of modern consumers for high-tech glasses.

[0051] BRIEF DESCRIPTION OF DRAWINGS

[0052] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, read in conjunction with the accompanying drawings:

[0053] Figure 1 is a workflow diagram of the present application.

[0054] DETAILED DESCRIPTION

[0055] The present application will be described in detail below with specific embodiments. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of changes and improvements can be made. These are within the scope of the present application. EMBODIMENTS

[0056] As shown in Figure 1, the lens manufacturing method provided by the present application comprises:

[0057] Design and simulation: Using optical design software, design the initial structure of the progressive lens according to the requirements, ensure that the lens design can meet the seamless visual transition from near to far distance. Through computer simulation technology to simulate the propagation path of light through the lens, ensure that the designed micro-nano structure can achieve the expected refractive index gradient and optical effect. For micro-nano structure, the length, width, height and spacing of each micro-nano structure can be defined in detail. In the design process, the overall shape and size of the lens are fully considered to ensure the adaptability of the micro-nano structure to the lens. After simulation, the design file is converted into a scanning path file that can be recognized by the laser system. Through two-photon micro-nano processing technology, the machining precision of 50 nanometers is realized, and the optical structure inside the lens is accurately controlled to optimize the light propagation path. The lens substrate can be a structure with one concave surface and one convex surface, and the micro-nano structure can be arranged on the concave surface, the convex surface, or both.

[0058] The structure of the micro-nano structure includes micro-column array structure and gradient micro-lens structure. In the far distance area of the lens, a micro-column array with relatively fixed height and diameter can be designed, and by adjusting the material refractive index and arrangement density of the micro-column, the required relatively stable refractive power in this area can be achieved. In the transition area and near distance area, gradient micro-lens structure is adopted. The radius of curvature of the micro-lens gradually decreases from the far distance area to the near distance area to realize the smooth transition of refractive power. For example, the diameter of each micro-lens can be controlled within 15-25 microns, and by adjusting the height and curvature of the micro-lens, the refraction angle of light can be accurately controlled to meet the vision correction requirements at different distances. For example, at the starting position of the transition area, the micro-lens height is 12 microns and the curvature radius is 30 microns; in the near distance area, the micro-lens height increases to 18 microns and the curvature radius decreases to 20 microns.

[0059] The distribution of the micro-nano structure includes axial distribution and radial distribution. Along the vertical direction of the lens (from the top to the bottom of the lens), according to the pre-simulated refractive index distribution model, the micro-nano structure is designed in the axial direction. In the far distance area, the micro-nano structure maintains uniform distribution; into the transition area, the size and arrangement density of the micro-nano structure change according to a certain gradient function, such as linear gradient or S-shaped gradient function, to ensure the smooth transition of refractive power; in the near distance area, according to the near distance vision correction requirements, the final distribution state of the micro-nano structure is determined. Considering that in actual use, the line of sight of the human eye is not always vertical downward, but also has a certain horizontal and inclined direction of movement. Therefore, in the radial direction (horizontal direction with the center of the lens as the center), the micro-nano structure is reasonably distributed. In the central area of the lens, the distribution of the micro-nano structure is relatively dense and uniform to ensure the clarity of the central vision; gradually sparse towards the edge area, while fine-tuning the shape and size of the micro-nano structure, compensating for the aberration caused by edge refraction, to ensure good visual effect in the entire lens viewing range.

[0060] Pre-treatment: The surface of the lens substrate is pre-treated, which includes cleaning, degreasing or surface activation. For example, the lens substrate can be first cleaned with anhydrous ethanol to remove visible dust, particles and other impurities on the surface. Then put the lens substrate into the ultrasonic cleaner filled with acetone solution. Acetone, as a commonly used organic solvent, has good solubility for grease. Set the power of the ultrasonic cleaner to 50-100 watts, the frequency to 40-60 kHz, and the cleaning time to 10-15 minutes. Under the action of ultrasonic waves, acetone can penetrate deeper into the tiny gaps and holes on the surface of the lens, completely dissolve and strip the grease. After cleaning, take out the lens substrate and rinse it with deionized water for 3-5 times to remove the residual acetone solution. Finally, configure a 5%-10% NaOH solution and immerse the rinsed lens in it. The NaOH solution can react with the molecules on the surface of the lens to produce more active groups, enhancing the adhesion of the photoresist to the lens. The soaking time is controlled within 5-10 minutes, and then the lens is rinsed with a large amount of deionized water to ensure that the residual NaOH solution on the surface is completely removed. Finally, place the lens in a clean environment to dry or dry it with nitrogen. After this series of cleaning, degreasing and surface activation, the subsequent photoresist coating step can effectively improve the photoetching quality and the stability of the micro-nano structure.

[0061] Coating photoresist: Coating photoresist on the lens substrate, the coating method of photoresist is not limited to spin coating, drop coating or spraying, the thickness of photoresist coating is greater than or equal to 100 nm. In the selection of photoresist, photoresist with two-photon absorption characteristics is adopted, and the refractive index of photoresist is between 1.5 and 1.9 to meet the needs of different optical designs. The refractive index in this range can cover most visual applications, providing a wider design space for lenses. Taking spin coating as an example, control the speed of the spin coater at 1000-3000 rpm for 30-60 seconds. After coating the photoresist, it also includes pre-curing the coated photoresist, which includes heat treatment to make the photoresist volatilize, and the volatilization amount is less than or equal to 40%.

[0062] Two-photon polymerization: the laser system makes the emitted laser light react with the photo-polymerization of the photoresist according to the scanning path file, and photo-etches the pre-designed micro-nano structure on the lens substrate, obtaining a lens with a pre-designed layout of micro-nano structure. The lens realizes the required refractive index distribution through the pre-designed layout of micro-nano structure. Specifically, the lens coated with photoresist is placed on the high-precision workbench of the two-photon lithography system, and the lens is accurately positioned and aligned by using the optical positioning system. By adjusting the position of the workbench, it is ensured that the processing area of the lens is located within the effective scanning range of the laser beam, and the center of the lens coincides with the origin of the scanning coordinate system. According to the pre-designed micro-nano structure layout, the corresponding scanning parameters are input into the control software of the lithography system, including scanning speed, scanning path, laser energy, etc. For example, the scanning speed is generally controlled between 1-10 mm / s to ensure that the photoresist has enough time to absorb two photons and undergo photo-polymerization. During the scanning process, the stability of the laser energy and spot size is monitored in real time. For complex micro-nano structures, a combination of layered scanning and spiral scanning is used. First, coarse scanning is performed to determine the general outline, and then fine scanning is performed to improve the accuracy and surface quality of the structure.

[0063] After lithography, the surface of the lens substrate is further processed, including: removing the remaining photoresist on the lens substrate, adding an anti-reflection coating, adding a waterproof coating, or optical performance detection. For example, after lithography is completed, the lens is placed in a developing solution to remove the photoresist that has not undergone photo-polymerization. A developing solution matching the photoresist is selected, such as tetramethylammonium hydroxide (TMAH) developing solution for common positive photoresist, which is diluted with deionized water at a ratio of 1:4. The lens is immersed in the developing solution for 3-5 minutes, while ultrasonic oscillation is performed at a frequency of 40-60 kHz to accelerate the developing process and ensure that the photoresist is completely removed without residue affecting the optical performance of the lens. After development, the lens is rinsed with deionized water several times to remove surface residues and impurities. Then the lens is immersed in isopropanol solution for 1-2 minutes for dehydration treatment. Finally, the lens is dried by nitrogen blowing or vacuum drying to ensure that there is no water residue on the lens surface, avoiding water stains or oxidation. High-precision optical detection equipment such as atomic force microscope (AFM) and scanning electron microscope (SEM) are used to detect the microstructure of the lens after lithography, checking the size accuracy, shape integrity and surface roughness of the micro-nano structure. At the same time, an interferometer is used to measure the surface accuracy of the lens, and a power meter is used to measure the refractive power of different regions of the lens. The detection results are compared with the design values for analysis. If the size deviation of the micro-nano structure, surface defects or the optical performance of the lens do not meet the requirements, the lithography parameters are adjusted or secondary lithography is performed for optimization to ensure that the quality of the lens meets the design requirements.

[0064] In the present application, the micro-nano structures on the same lens can have the same or different optical properties. To obtain micro-nano structures with different optical properties, photoresist with different refractive indices can be applied separately for photopolymerization reaction, and at least two micro-nano structures with different optical properties can be obtained on the same lens substrate.

[0065] Example 2

[0066] A progressive lens can be prepared by the method of Example 1, including a lens and micro-nano structures formed on the lens by photopolymerization reaction. The micro-nano structures with a predetermined layout achieve the required refractive index distribution to provide a progressive visual effect. The lens has one or more micro-nano structures with different optical properties. For the micro-nano structures, the length, width, height, and spacing of each micro-nano structure can be defined in detail. In the design process, the overall shape and size of the lens are fully considered to ensure the adaptability of the micro-nano structures to the lens. After simulation, the design file is converted into a scanning path file that can be recognized by the laser system. Through two-photon micro-nano processing technology, a processing precision of at least 50 nanometers is achieved, and the optical structure inside the lens is accurately controlled to optimize the light propagation path.

[0067] The structure of the micro-nano structure includes a micro-column array structure and a gradient microlens structure. In the far vision area of the lens, a micro-column array with relatively fixed height and diameter can be designed. By adjusting the material refractive index and arrangement density of the micro-columns, the required relatively stable refractive power in this area can be achieved. In the transition zone and near vision area, a gradient microlens structure is used. The radius of curvature of the microlens gradually decreases from the far vision area to the near vision area to achieve smooth transition of the refractive power. By adjusting the height and curvature of the microlens, the refraction angle of the light is accurately controlled to meet the vision correction needs at different distances.

[0068] The distribution of the micro-nano structures includes axial distribution and radial distribution. Along the vertical direction of the lens (from the top to the bottom of the lens), the micro-nano structures are designed to be distributed axially according to a pre-simulated refractive index distribution model. In the far vision area, the micro-nano structures are uniformly distributed; into the transition area, the size and arrangement density of the micro-nano structures change according to a certain gradient function, such as a linear gradient or an S-shaped gradient function, to ensure smooth transition of the refractive power; in the near vision area, the final distribution state of the micro-nano structures is determined according to the near vision correction requirements. Considering that in actual use, the line of sight of the human eye is not always vertically downward, but also moves in a certain horizontal and inclined direction. Therefore, the micro-nano structures are reasonably distributed in the radial direction (the horizontal direction with the center of the lens as the center). In the central area of the lens, the micro-nano structures are relatively dense and uniform to ensure the clarity of the central vision; gradually sparse towards the edge area, while fine-tuning the shape and size of the micro-nano structures, to compensate for the aberration caused by edge refraction, ensuring good visual effect in the entire visible range of the lens. The surface of the progressive lens has a scratch-resistant coating, an ultraviolet-resistant coating, a blue light-resistant coating, a super-hydrophobic coating or a super-oleophobic coating. The lens surface can be integrated with a micro two-dimensional code or a holographic mark for data storage or identity verification by a two-photon micro-nano processing technology.

[0069] For example, the myopia lens, the micro-nano structure can be arranged on the concave surface of the lens, and the micro-nano structure is arranged in an array. The micro-nano structure can change the propagation and scattering characteristics of the light passing through the lens, thereby adjusting the contrast of the light entering the eye to achieve a specific visual effect and physiological effect, which has a positive effect on myopia prevention and control. Under the action of multiple micro-nano structures uniformly distributed, the contrast control function and the optical path difference regulation function can be realized at the same time. The micro-nano structure is a structure with a nanoscale feature size and works based on the diffraction principle of light. The nanoscale diffraction structure has a periodicity that is accurately controlled at the nanoscale. This periodic structure can produce a specific diffraction effect on the incident light. The size of the periodicity is related to the wavelength of the target light. Generally, it is within a certain proportion of the target wavelength, for example, within the range of 0.75 lambda to 3 lambda of the target wavelength lambda. In some embodiments, the defocus amount De of the micro-nano structure satisfies: +4.00 D≤De≤ +10.00D, wherein D represents diopter, and +10.00D is the extreme defocus amount. The micro-lens 3 reaches the extreme defocus amount within an 8° field of view angle. The defocus amount of the micro-nano structure is positively correlated with the field of view angle. The defocus amount increases with the increase of the field of view angle. The effective defocus amount of the micro-nano structure region is larger, and has an ultra-low disturbance amount, better compliance, and better control effect. The present application optimizes the defocus design, which is more in line with the physiological characteristics of the human eye, and the effect of the macular region and the enhancement effect is better. On the basis of the array arrangement, the micro-nano structure can also be a layer-by-layer stacked structure obtained by coating photoresist with different refractive indices in Embodiment 1 and performing photopolymerization reaction. The number of micro-nano structures on the lens is more than 33,000. A large number of micro-nano structures are arranged on a unit area of the lens to achieve high-intensity optical path difference regulation. In the embodiments of the present application, it can be understood that a continuous ultra-low disturbance defocus region is formed by more than 33,000 micro-nano structures. The micro-lens size of the conventional myopia prevention and control lens is relatively large and generally ranges from 0.8 mm to 2 mm. The present application significantly reduces the size of the micro-nano structure to accommodate more micro-nano structures per unit area, thereby achieving high-intensity optical path difference regulation and further achieving contrast control.

[0070] In the present application, the micro-nano structure includes an optical waveguide or an optical antenna, and can also be integrated with an organic light-emitting diode (OLED) or other light sources to realize self-luminous function for visual assistance in low-light environments.

[0071] In other embodiments, the micro-nano structure can be designed to modulate the polarization state of the light passing through the lens to provide polarization modulation function; or the micro-nano structure is designed to realize the temperature response function of the lens, by changing the state of the temperature-sensitive material inside the lens to adjust the optical performance of the lens. The micro-nano structure can also be designed as an adjustable optical element, such as an adjustable focus lens or a grating, to adapt to the dynamic visual needs of the user.

[0072] Embodiment 3

[0073] A manufacturing system of a lens, comprising: a femtosecond laser, a focusing optical system, a three-dimensional moving platform, a photoresist feeding device, and software for designing and simulating micro-nano structures. The three-dimensional moving platform is configured to load, move and drive rotation of a lens substrate, the photoresist feeding device is configured to coat photoresist on the lens substrate, the femtosecond laser is configured to perform photoetching on the lens substrate coated with photoresist according to a micro-nano structure pattern provided by the software, to obtain a micro-nano structure corresponding to the micro-nano structure pattern on the lens substrate, and to achieve a required refractive index distribution through the micro-nano structure, and the focusing optical system is configured to control the scanning speed and focal length of the laser emitted by the femtosecond laser.

[0074] In other embodiments, the manufacturing system further comprises a real-time monitoring and quality detection device for monitoring the processing and verifying the optical performance of the lens.

[0075] Embodiment 4

[0076] A repairing method of a lens, comprising using the lens manufacturing method of embodiment 1 to locally repair damaged micro-nano structures on the lens.

[0077] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0078] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which do not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict, provided that they do not conflict.

Claims

1. A method of making a lens, characterized in that, Comprising: coating a photoresist on a lens substrate; lithographing a preset micro-nano structure on the lens substrate by laser emitted from a laser system and photopolymerization reaction of the photoresist, to obtain a lens with a preset layout of micro-nano structure, the lens achieving a required refractive index distribution through the preset layout of micro-nano structure.

2. The lens manufacturing method according to claim 1, characterized in that, The photoresist is a photoresist with two-photon absorption characteristics, and the lithography is two-photon lithography. The refractive index of the photoresist is between 1.5 and 1.

9. The thickness of the photoresist coating is greater than or equal to 100 nm. The coating method of the photoresist includes spin coating, drop coating or spray coating.

3. The lens manufacturing method according to claim 1, characterized in that, Before coating the photoresist, the surface of the lens substrate is also subjected to pretreatment, which includes cleaning, degreasing or surface activation. After coating the photoresist, the coated photoresist is also subjected to pre-curing, which includes heat treatment to volatilize the photoresist, and the volatilization amount is less than or equal to 40%. After lithography, the surface of the lens substrate is also subjected to post-treatment, which includes removing the remaining photoresist on the lens substrate, adding an anti-reflection coating, adding a water-repellent coating or optical performance detection.

4. The lens manufacturing method according to claim 1, characterized in that, The minimum feature size of the micro-nano structure is 50 nm. At least two micro-nano structures with different optical properties are obtained on the same lens substrate by coating photoresists with different refractive indices and performing photopolymerization reactions respectively.

5. A progressive lens, characterized by, Comprising a lens and a micro-nano structure formed on the lens by photopolymerization reaction, the lens achieves a required refractive index distribution through the preset layout of micro-nano structure.

6. The progressive lens according to claim 5, wherein The micro-nano structure includes an optical waveguide or an optical antenna. The micro-nano structure is designed to modulate the polarization state of light passing through the lens to provide a polarization modulation function, or the micro-nano structure is designed to achieve a temperature response function of the lens by changing the state of temperature-sensitive materials inside the lens to adjust the optical performance of the lens.

7. The progressive lens of claim 5, wherein, The surface of the progressive lens has a scratch-resistant coating, an ultraviolet-resistant coating, a blue light-resistant coating, a super-hydrophobic coating or a super-oleophobic coating.

8. The progressive lens of claim 5, wherein, The minimum feature size of the micro-nano structure is 50 nm. The lens has one or more micro-nano structures with optical properties.

9. A system for manufacturing a lens, characterized in that Comprising: a femtosecond laser, a focusing optical system, a three-dimensional moving platform and a photoresist feeding device, and software for designing and simulating micro-nano structures; The three-dimensional moving platform is configured to load, move and rotate the lens substrate; The photoresist feeding device is configured to coat the lens substrate with photoresist; The femtosecond laser is configured to perform lithography on the lens substrate coated with photoresist according to the micro-nano structure pattern provided by the software, to obtain a micro-nano structure corresponding to the micro-nano structure pattern on the lens substrate, and to achieve a required refractive index distribution through the micro-nano structure; The focusing optical system is configured to control the scanning speed and focal length of the laser emitted by the femtosecond laser.

10. A method of repairing a lens, characterized in that, Using the lens manufacturing method of any one of claims 1-4 to locally repair damaged micro-nano structures on the lens.

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