Defocused eyeglass lens with microlens array, design method and eyeglasses

Abstract

The present application provides a defocused eyeglass with a microlens array, a design method and eyeglasses. The defocused eyeglass with a microlens array comprises a first surface and a second surface opposite to the first surface, a regular polygonal grid area is set outside the clear vision area of ​​the first surface, and a microlens is arranged in each regular polygonal grid. The defocused eyeglass is designed according to the preset energy ratio of the human eye, which can greatly improve the wearer's experience.

Description

Technical Field

[0001] The present application belongs to the field of optical technology and relates to a defocused eyeglass lens with a microlens array, a design method and eyeglasses. Background Art

[0002] The human eye plays a vital role in obtaining information. According to statistics, more than 80% of information is obtained from the eyes. According to statistics from the World Health Organization, people who wear glasses account for one-fifth of the world's total population, and a considerable proportion of them need to wear specially manufactured glasses. This has triggered a global focus on free-form surface technology and microlens array technology in eyeglass optics, and there has been a wave of competition among countries around the world to research and develop various types of lenses.

[0003] In recent years, with the rapid development of society and science, the burden of close-range eye use among teenagers has been increasing. The incidence of myopia among teenagers and the deepening of myopia refraction have become more and more serious. To this day, there is still no ideal treatment method. Myopia is a global social problem and a medical problem. Peripheral hyperopic defocus of the retina is the core mechanism of myopia. With the increasing requirements for lightweight, functional, comfortable and novel eye lenses, traditional eye lenses can no longer meet the needs of the modern eyewear industry. Peripheral defocus eye lenses are about to become the mainstream corrective eye lenses.

[0004] For example, the microlens peripheral defocus eyeglasses mentioned in Chinese patent CN110687689A are provided with a central correction area, a nasal microlens area, a temporal microlens area, and a lower microlens area. The nasal microlens area and the temporal microlens area are each provided with two gradient microlens areas with different refractive powers and a full microlens area, so as to achieve the purpose of correcting the central myopic defocus of the retina of myopia and the asymmetric hyperopic defocus of the nasal and temporal retina of myopia. However, the lens does not take into account the different light sensitivity of the human eye at different angles, and the uniform division of the microlens structure makes the wearer not comfortable enough when wearing the defocus eyeglasses. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the purpose of this application is to propose a defocused eyeglass lens with a microlens array, a design method and glasses, and on this basis, to improve the popularity of defocused glasses.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] A defocused eyeglass lens with a microlens array, characterized in that:

[0008] The defocused eyeglass lens has:

[0009] a first surface and a second surface opposite to the first surface, wherein the second surface and the first surface together form a refractive effect,

[0010] A regular polygonal meshing area is set outside the clear vision area of ​​the first surface,

[0011] The regular polygon meshing area includes regular polygon meshes, and each of the regular polygon meshes is configured with a microlens. Through such a design, the size arrangement of the microlenses is used as a theoretical basis, and the structure of the eyeglass lens is further improved based on the theoretical basis to improve the comfort of myopic people wearing glasses.

[0012] Preferably, the regular polygonal meshing area is arranged in a region outside the clear vision area of ​​the first surface with a field of view angle between 20 and 70 degrees.

[0013] Preferably, the regular polygonal grid is a regular hexagonal grid or a regular octagonal grid.

[0014] Preferably, the defocused eyeglass with microlens array is characterized in that, based on the calculation formula

[0015]

[0016] Calculate the percentage ratio of the microlens to the regular polygon mesh area,

[0017] Where r is the semi-aperture of the microlens, and S is the area of ​​the regular polygonal mesh.

[0018] Preferably, the defocused eyeglass lens is a resin lens.

[0019] The embodiment of the present application provides a design method of a defocused eyeglass with a microlens array, characterized in that it comprises the above-mentioned defocused eyeglass,

[0020] The method comprises:

[0021] S1. Obtain the main focal length F of the defocused eyeglass lens,

[0022] S2. Calculate the secondary focal length f of the microlens, and then use the formula

[0023]

[0024] Calculate the radius of curvature R of the microlens, where r2 is the radius of curvature of the second surface of the defocused eyeglass lens, n is the refractive index of the lens,

[0025] S3. Calculate the energy proportion of the human eye under different viewing angles, and estimate the percentage of the microlens to the regular polygon mesh area.

[0026] S4. Based on calculation formula

[0027]

[0028] The semi-aperture r of the microlens is calculated, where S is the area of ​​the regular polygonal mesh. S3 includes: recording the most comfortable energy output ratios felt by multiple glasses wearers at different viewing angles, and then performing curve fitting on the obtained scatter plot of the relationship between the viewing angle and energy, and obtaining the preset energy occupancy ratio of the human eye at different viewing angles from the fitting curve, which is equivalent to the percentage Ratio of the microlens to the regular polygonal mesh area.

[0029] Preferably, the design method of the defocused eyeglass lens with a microlens array is characterized in that:

[0030] It also includes: S5. preparing a microlens with a semi-aperture of r in each regular polygonal mesh.

[0031] Preferably, when the area of ​​the regular polygonal mesh located at the edge of the regular polygonal meshing region is less than S / 2, no microlens is configured in the regular polygonal mesh.

[0032] Preferably, step S2 includes: calculating the focal length f of the microlens according to the distance d between the focal plane generated by the microlens and the focal plane generated by the main lens area.

[0033] An embodiment of the present application provides a pair of glasses comprising the above-mentioned defocused eyeglass lenses.

[0034] Beneficial Effects

[0035] The defocused eyeglasses with a microlens array proposed in the present application have the following characteristics:

[0036] 1) Designing defocused lenses based on the energy ratio preset by the human eye can greatly improve the wearer's experience.

[0037] 2) Enhance the wearing comfort of the defocus lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the energy occupancy ratio corresponding to the preset field of view of the human eye;

[0039] Figure 2 It is a schematic diagram of a human eye wearing glasses;

[0040] Figure 3 is a schematic diagram of a regular polygonal meshing region and a microlens in an embodiment;

[0041] Figure 4 Schematic diagram of the relationship between the semi-aperture r of the microlens and the side length L of the regular hexagonal grid when the viewing angle is 30 degrees and 40 degrees in the embodiment.

[0042] In the figure, 10 is the first surface; 20 is the second surface; 11 is the regular polygonal meshing area; 12 is the microlens; 13 is the regular polygonal mesh; and 14 is the clear vision area. DETAILED DESCRIPTION

[0043] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted as the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0044] A defocused eyeglass lens having a microlens array, such as Figure 2 As shown, the defocused eyeglass lens comprises: a first surface 10 and a second surface 20 opposite to the first surface, as shown in FIG. Figure 3 As shown, a regular polygonal meshing area 11 is set outside the clear vision area 14 of the first surface 10; a microlens 12 is configured in each regular polygonal mesh 13 in the regular polygonal meshing area.

[0045] It is worth noting that the role of the regular polygonal mesh is to provide the position coordinates for configuring the microlens. It is only a position area division given for the convenience of limiting the position of the microlens on the mirror surface, and does not mean that a regular polygonal mesh is set on the first surface.

[0046] Preferably, the clear vision area is the field of view angle area of ​​0-20 degrees of the defocused eyeglasses with a microlens array; the regular polygonal gridded area is the area corresponding to the field of view angle of 20-70 degrees on the first surface; the area exceeding 70 degrees is out of use and no microlenses are arranged.

[0047] In the defocused eyeglasses, the field of view angle area of ​​0-20 degrees is the clear vision area of ​​the glasses, and no defocused microlenses are set in this area; defocused microlenses are set between 20-70 degrees; and no defocused microlenses are arranged in the area beyond 70 degrees. Designing defocused eyeglasses according to the proportion of energy preset to enter the wearer's eyes can greatly improve the wearer's experience. After a large amount of data collection and curve fitting, the applicant obtained the energy occupancy ratio corresponding to the preset field of view angle of the human eye. The proportion of energy preset to enter the eye can be expressed (simulated) by the percentage of the area of ​​the regular polygonal grid (such as a hexagonal grid or a regular octagonal grid) occupied by the microlens area.

[0048] Next, the defocused eyeglasses proposed in this application are described by taking a regular hexagonal grid area as an example and combining the accompanying drawings.

[0049] like Figure 1Shown is a schematic diagram of the energy occupancy ratio Rat io corresponding to the preset field of view angle Theta of the eye. In the figure, the horizontal axis is the field of view angle, and the vertical axis is the energy ratio. The area with a field of view angle of 0-20 degrees is the bright vision area, and the area with a field of view angle of 20-70 degrees is the defocus area. The curve is obtained by fitting after data statistics.

[0050] like Figure 2 Schematic diagram simulating a human eye wearing a defocused lens. Figure 2 Where d is the distance between the focal plane generated by the microlens and the focal plane generated by the main lens area, Theta is the field of view, Eye is the position of the human eye, and one side of the defocused eyeglass is configured with a first surface and a second surface opposite to the first surface (close to the eye side).

[0051] like Figure 3 The structure diagram of the defocused eyeglasses of the embodiment of the present application under one viewing angle is shown. The 0-20 degree viewing angle area of ​​the first surface of the defocused eyeglasses is the clear vision area, and the 20-70 degree viewing angle area outside is set as a regular hexagonal grid area, and then a microlens is arranged in each hexagonal grid. In this way, the ratio of the microlens area to the regular hexagonal grid area can be regarded as the energy ratio of the light entering the human eye under the corresponding viewing angle. The defocused eyeglasses are resin lenses.

[0052] Next, a design method for the above-mentioned defocused spectacle lens is described, which method comprises:

[0053] S1. Get the main focal length F of the defocused eyeglass lens,

[0054] In this step, the main focal length F is calculated based on the refractive index n of the lens, the first surface curvature radius r1, and the second surface curvature radius r2;

[0055]

[0056] S2. Calculate the secondary focal length f of the microlens and the radius of curvature R of the microlens.

[0057] In this step, the focal length f of the microlens is calculated according to the distance d between the focal plane generated by the microlens and the focal plane generated by the main lens area, and then the curvature radius R of the microlens is calculated in reverse by the following formula;

[0058]

[0059] S3. Calculate the energy proportion of the human eye at different viewing angles.

[0060] The most comfortable energy output ratios felt by multiple glasses wearers at different viewing angles were recorded, and then a curve fitting was performed on the obtained scatter plot of the relationship between viewing angle and energy. The energy ratios preset by the human eye at different viewing angles are shown in Table 1 (Energy ratios preset by the human eye at different viewing angles);

[0061] Table 1. Energy proportion of human eyes at different viewing angles

[0062] Field of view 0 10 20 30 40 50 60 70 80 Ratio 0.8 0.8 0.8 0.76 0.73 0.7 0.67 0.65 0.6

[0063] S4. Based on calculation formula

[0064]

[0065] Calculate the microlens semi-aperture r, where S1 is the area of ​​the regular hexagonal grid and L is the side length of the regular hexagonal grid;

[0066] In this step, the side length L of the regular hexagonal grid is normalized to obtain the corresponding microlens semi-aperture as shown in Table 2. The specific calculation can be multiplied by the corresponding ratio.

[0067] Table 2. Field of view, energy / area ratio, and half-aperture comparison table

[0068]

[0069]

[0070] In this way, the curvature radius R of the microlens and the semi-aperture r of the microlens are obtained.

[0071] like Figure 4 It shows the relationship between the semi-aperture r of the microlens and the side length L of the regular hexagonal grid when the field of view angle (Theta) is 30 degrees and 40 degrees respectively.

[0072] Next, the above-mentioned design method is described with a specific embodiment.

[0073] In one example: the refractive index of the lens (defocused spectacle lens) is n=1.597 (nominal refractive index 1.6), myopia is 300 degrees, the radius of curvature r1 of the first surface of the lens is 392.76 mm, the radius of curvature r2 of the second surface is 131.2 mm, and the center thickness is ignored, and the following formula is used:

[0074]

[0075] It can be calculated that the main focal length F of the lens is 328.35mm. Assuming that the distance d between the focal plane generated by the microlens and the focal plane generated by the main lens area is 10mm, if it is 10mm ahead, the focal length f of the microlens is 318.35mm, according to the following formula:

[0076]

[0077] It can be calculated that the radius of curvature R of the microlens is 419 mm.

[0078] Taking a viewing angle of 40 degrees as an example, if the side length L of the regular hexagonal grid is 2 mm, the semi-aperture r of the microlens is 2×0.78=1.56 mm.

[0079] In another example: the lens refractive index n = 1.499 (nominal refractive index 1.49), myopia 400 degrees, the first surface curvature radius r1 of the lens is 457.8mm, the second surface curvature radius r2 is 98mm, and the center thickness is ignored, which can be obtained by the following formula:

[0080]

[0081] The main focal length F of the lens is calculated to be 254.47mm. Assuming that the distance d between the focal plane generated by the microlens and the focal plane generated by the main lens area is 10mm, if it is 10mm backward, the focal length f of the microlens is 264.47mm, according to the following formula:

[0082]

[0083] It can be calculated that the radius of curvature R of the microlens is 402.02 mm.

[0084] Taking a viewing angle of 60 degrees as an example, if the side length L of the regular hexagonal grid is 5 mm, the semi-aperture r of the microlens is 5×0.73=3.65 mm.

[0085] In another example: the lens refractive index n = 1.499 (nominal refractive index 1.49), myopia 400 degrees, the first surface curvature radius r1 of the lens is 457.8 mm, the second surface curvature radius r2 is 98 mm, and the center thickness is ignored. The lens focal length F is calculated to be 254.47 mm in the previous embodiment. Assuming that the distance d between the focal plane generated by the microlens and the focal plane generated by the main lens area is 20 mm, if the focal plane is advanced by 20 mm, the focal length f of the microlens is 234.47 mm, according to the following formula:

[0086]

[0087] It can be calculated that the radius of curvature R of the microlens is 666.61 mm.

[0088] Taking a viewing angle of 60 degrees as an example, if the side length L of the regular hexagonal grid is 6 mm, the semi-aperture r of the microlens is 6×0.73=4.38 mm.

[0089] The present application also provides a pair of glasses, which includes the above-mentioned defocused eyeglasses, and the defocused eyeglasses are obtained by the above-mentioned design method. The glasses design the defocused eyeglasses according to the preset energy ratio entering the wearer's human eyes, which can greatly improve the wearer's experience.

[0090] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made in the spirit of the present application shall be included in the protection scope of the present application.

Claims

1. A method for designing a defocused eyeglass lens having a microlens array, the defocused eyeglass lens having: A first surface and a second surface opposite to the first surface, wherein the second surface and the first surface form a refractive effect together, and a regular polygonal meshing area is set outside the clear vision area of ​​the first surface, wherein the regular polygonal meshing area includes regular polygonal meshes, and each of the regular polygonal meshes is configured with a microlens; Features The design method includes the following steps: S1. Obtain the main focal length F of the defocused eyeglass lens, S2. Calculate the secondary focal length f of the microlens, and then use the formula Calculate the radius of curvature R of the microlens, where r2 is the radius of curvature of the second surface of the defocused eyeglass lens, n is the refractive index of the lens, S3. Calculate the energy proportion of the human eye under different viewing angles: Estimate the percentage ratio of the microlens to the regular polygon mesh area, record the most comfortable energy occupancy ratio felt by multiple glasses wearers at different viewing angles, and then perform curve fitting on the obtained scatter plot of the relationship between viewing angle and energy. From the fitting curve, obtain the preset energy occupancy ratio of the human eye at different viewing angles. S4. Based on calculation formula Calculate the semi-aperture r of the microlens, where S is the area of ​​the regular polygon mesh; S5. Prepare a microlens with a semi-aperture of r in each regular polygonal mesh.

2. The method for designing a defocused eyeglass lens with a microlens array according to claim 1, characterized in that: When the area of ​​the regular polygon mesh located at the edge of the regular polygon meshing region is smaller than S / 2, no microlens is arranged in the regular polygon mesh.

3. The method for designing a defocused eyeglass lens with a microlens array according to claim 1, characterized in that: The step S2 includes: The secondary focal length f of the microlens is calculated according to the distance d between the focal plane generated by the microlens and the focal plane generated by the main lens area.

4. The method for designing a defocused eyeglass lens with a microlens array according to claim 1, wherein: The regular polygonal meshing area is arranged in an area outside the clear vision area of ​​the first surface with a field of view angle between 20 and 70 degrees.

5. The method for designing a defocused eyeglass lens with a microlens array according to claim 4, characterized in that: The regular polygonal grid is a regular hexagonal grid or a regular octagonal grid.

6. The method for designing a defocused eyeglass lens with a microlens array according to claim 1, wherein: The defocused spectacle lens is a resin lens.

7. A defocused eyeglass lens obtained by using the design method of a defocused eyeglass lens with a microlens array as claimed in claim 5.

8. A pair of glasses obtained by using the design method of a defocused eyeglass lens with a microlens array as claimed in claim 5.

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