Micro lens and application

Abstract

The invention provides a micro lens and application, the micro lens is formed by splicing at least more than two cambered surface mirrors with different curvatures up and down, and all the cambered surface mirrors form at least one optical axis. According to the invention, the micro lens is designed to be formed by vertically splicing a plurality of cambered surface mirrors with different curvatures, so that different light adding distribution of the center and the periphery can be realized on the same micro lens, and stray light can be generated at the splicing part of the plurality of cambered surface mirrors, so that defocus signals and contrast inhibition are enhanced. In the high-order defocus lens and glasses formed by the micro lens, different eccentric modes and high-order defocus characteristics of the micro lens can be realized by eccentrically arranging the curvature centers of the spliced cambered mirrors, and stronger positive defocus signals can be provided for specific view directions of different users; and the myopia control effect is further improved.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and particularly relates to a microlens and its application. Background Art

[0002] The rapid growth of myopia has become a global public health problem. Currently, the lenses used for myopia control are mainly based on the following two working principles: One is to use the lens to provide a scattering or diffusion effect in the peripheral retinal area, reducing the imaging contrast in this area, thereby inhibiting the excessive growth of the eye axis. Typical representatives include the "frosted glass (DOT)" diffusive myopia control lenses (such as SightGlass). The other is to provide a certain amount of positive diopter (+D) for the peripheral retina within the visual field of 10° - 20°, generating a myopic defocus signal to help inhibit the excessive elongation of the eye axis. Typical representatives are various frame glasses based on microlens arrays, including "HOYA NeoView" and "Essilor StarKids".

[0003] However, the above technologies still have the following problems that need to be improved in design and application: (1) How to further strengthen the defocus signal of the peripheral retina and improve the myopia control effect; (2) How to balance the appearance transparency and optical scattering (or contrast reduction) to increase the stimulation to the retina without significantly affecting the appearance; (3) How to flexibly implement multiple diopter zones and high-order defocus designs on the same lens to meet the needs of people of different ages, different myopia degrees, and different visual requirements. Summary of the Invention

[0004] The purpose of the present invention is to address the three problems that need to be improved in the background art, and further propose a microlens and its application. This microlens combines multi-arc microlenses with high-order defocus microlenses, which can achieve the addition of diopter in microlens zones and the suppression of retinal contrast while having high-order defocus characteristics, enhancing the stimulation to the retina and improving the myopia control effect for different populations.

[0005] To achieve the above technical objectives, the technical solution adopted in this application is as follows:

[0006] In the first aspect, the present invention provides a microlens formed by splicing at least two or more arc mirrors with different curvatures up and down, and all the arc mirrors form at least one optical axis.

[0007] Preferably, the number of arc mirrors is 2 - 4, and more preferably 2 - 3.

[0008] Preferably, the curvature of the arc mirror at the top layer is greater than that of other arc mirrors; and / or, the diameter range of the top layer arc mirror is 0.2 - 1.0 mm, preferably 0.3 - 0.6 mm.

[0009] Preferably, the plus power of the topmost aspheric mirror is 2 to 4D higher than that of other aspheric mirrors.

[0010] Preferably, among the microlenses, the plus power of the topmost aspheric mirror is +5D to +9D, and the plus power of other aspheric mirrors is +2D to +5D; or, among the microlenses, the plus power of the topmost aspheric mirror is -6D to +1D, and the plus power of other aspheric mirrors is +2D to +5D.

[0011] Preferably, the surface of the microlens is a spherical surface, an aspherical surface or a freeform surface; and / or, the diameter range of the microlens is 0.5 to 2.0 mm, more preferably 0.8 to 1.2 mm.

[0012] In a second aspect, the present invention provides a high-order defocus lens, comprising: a base lens, and a plurality of microlenses as described in the first aspect provided on the base lens, the base lens being divided into an optical zone and a microlens zone surrounding the optical zone, and the microlenses being provided in the microlens zone.

[0013] Preferably, the microlenses are arranged in multiple layers around the optical zone, and each layer of microlenses is arranged in a ring.

[0014] Preferably, the planar profiles of the base lens, the microlens zone and the optical zone are all circular, the diameter range of the base lens is 50 to 90 mm, more preferably 60 to 80 mm; the diameter range of the microlens zone is 20 to 60 mm, more preferably 30 to 50 mm; the diameter range of the optical zone is 5 to 15 mm, more preferably 6 to 9 mm.

[0015] In a third aspect, the present invention provides a pair of glasses, comprising a glasses frame and a high-order defocus lens as described in the second aspect fixed on the glasses frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By designing the microlens to be composed of multiple aspheric mirrors with different curvatures spliced up and down, the present invention can achieve different plus power distributions between the center and the periphery on the same microlens, and stray light can be generated at the splicing points of multiple aspheric mirrors, thereby enhancing the defocus signal and contrast suppression. In the high-order defocus lens and glasses formed by the microlens, different decentration methods and high-order defocus characteristics of the microlens can be realized by decentering the centers of curvature of these spliced aspheric mirrors, and a stronger positive defocus signal can be provided in a specific visual field direction for different users, so as to further improve the myopia control effect. Description of the Drawings

[0018] Figure 1Schematic diagram of a structure of the microlens of the present invention (formed by splicing two aspherical mirrors). Among them, A is the connection line of the curvature centers of the two aspherical mirrors, which is the optical axis, and B is that the connection line of the curvature centers of the two aspherical mirrors is non-collinear with their respective optical axes.

[0019] Figure 2 Schematic diagrams of other structures of the microlens of the present invention (formed by splicing three aspherical mirrors). Among them, in Figure A, the connection line of the curvature centers of the three aspherical mirrors and their respective optical axes are the same straight line; in Figure B, the connection line of the curvature centers of the three aspherical mirrors is the same straight line, and the connection line of the curvature centers is inclined at a certain angle compared with their respective optical axes; in Figure C, the connection lines of the curvature centers of the three aspherical mirrors are three different straight lines, and are inclined at a certain angle with their respective optical axes, generating a multi-center eccentric structure.

[0020] Figure 3 Schematic diagram of the first structure of the high-order defocus lens of the present invention.

[0021] Figure 4 is Figure 3 Schematic diagram of the side view structure of the high-order defocus lens shown.

[0022] Figure 5 Schematic diagram of the second structure of the high-order defocus lens of the present invention.

[0023] Figure 6 is Figure 5 Schematic diagram of the side view structure of the high-order defocus lens shown.

[0024] Figure 7 Schematic diagram of the third structure of the high-order defocus lens of the present invention.

[0025] Figure 8 is Figure 7 Schematic diagram of the side view structure of the high-order defocus lens shown.

[0026] Figure 9 Schematic diagram of the fourth structure of the high-order defocus lens of the present invention.

[0027] Figure 10 is Figure 9 Schematic diagram of the side view structure of the high-order defocus lens shown.

[0028] Figure 11 Schematic diagrams of two distribution methods of the microlens area of the high-order defocus lens of the present invention. Among them, in A, the circumferential contour of the wavy annulus presents continuous wave peaks and wave valleys with the same trend; in B, the wave valleys in two adjacent wavy annuli are staggered along the circumference.

[0029] Figure 12 Results of the RMS contrast test of the present invention. Among them, the abscissa is the spatial frequency and the ordinate is the RMS contrast.

[0030] Figures 1 - 10 In the figure, 1 - microlens, 2 - topmost aspherical mirror, 3 - other aspherical mirrors, 4 - basic lens, 5 - optical axis, 6 - center of curvature, 7 - connecting line of centers of curvature. Detailed implementation mode

[0031] In the description of the present invention, it should be noted that for those not specified with specific conditions in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. For those reagents or instruments not specified with the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0032] In the embodiments of the present invention, the concept of additional diopter is as follows: in a high-order defocus lens or glasses, taking the prescription diopter for seeing far in the optical zone of the basic lens as the reference, the difference between the microlens zone and the reference is the "additional diopter". For example: the diopter of the optical zone of the basic lens = -3D. For a microlens formed by splicing two aspherical mirrors with different curvatures up and down, the diopter of the topmost aspherical mirror is +4D, then the additional diopter is +7D, that is, +4D - (-3D) = +7D. The diopter of the other aspherical mirror is +1D, and the additional diopter is +4D, that is, +1D - (-3D) = +4D.

[0033] In the embodiments of the present invention, the concept of the optical axis is: the optical axis is the center line of an optical unit (such as a single aspherical mirror), and the optical unit (such as a single aspherical mirror) is symmetrical about the optical axis.

[0034] The following further elaborates on the present invention in detail in conjunction with the accompanying drawings and specific embodiments, which is an explanation rather than a limitation of the present invention.

[0035] The embodiments of the present invention provide a microlens formed by splicing at least two or more aspherical mirrors with different curvatures up and down, and all the aspherical mirrors form at least one optical axis. Each aspherical mirror is directly connected without smooth transition to retain a certain degree of light energy scattering.

[0036] Exemplarily, the number of aspherical mirrors is 2, 3, or 4, preferably 2 or 3. Among them, as Figure 1 shown, in the microlens formed by splicing two aspherical mirrors up and down, there can be 1 to 2 optical axes, that is, the connecting line of the centers of curvature of the two aspherical mirrors is their respective optical axis, or the connecting line of the centers of curvature of the two aspherical mirrors deviates from their respective optical axes. As Figure 2 shown, in the microlens formed by splicing three aspherical mirrors up and down, there can be 1 to 3 optical axes, that is, the connecting lines of the centers of curvature of the three aspherical mirrors pairwise are their respective optical axes, or only one of the connecting lines of the centers of curvature of the three aspherical mirrors pairwise overlaps with the optical axes of two of them, or the connecting lines of the centers of curvature of the three aspherical mirrors pairwise all deviate from their respective optical axes.

[0037] Exemplarily, the diameter of the microlens ranges from 0.5 to 2.0 mm, preferably from 0.8 to 1.2 mm.

[0038] In a preferred case of the present invention, the curvature of the topmost aspherical mirror is set to be greater than that of other aspherical mirrors. Specifically, when the microlens is prepared for a lens for preventing and controlling myopia, the dioptric power of the topmost aspherical mirror is 2D to 4D lower than that of the topmost aspherical mirror. Preferably, the dioptric power of the topmost aspherical mirror is generally set to +5D to +9D, and the dioptric power of other aspherical mirrors is generally set to +2D to +5D. In addition, the diameter of the topmost aspherical mirror ranges from 0.2 to 1.0 mm, preferably from 0.3 to 0.6 mm.

[0039] Regarding the setting of the dioptric power of the aspherical mirror, one specific example is as follows: on a microlens composed of two spliced aspherical mirrors with a diameter of about 1.2 mm, and the line connecting the curvature centers is their respective optical axes, the diameter region of the topmost aspherical mirror is 0.5 mm, and the dioptric power is +7D; the dioptric power of the aspherical mirror in the 0.5 mm to 1.2 mm annular region at the lower layer is +4D. In this example, the dioptric power of the upper aspherical mirror is 3D higher than that of the lower aspherical mirror, forming a multi-segment defocus design of "high in the center and low in the periphery". This setting method that provides stronger defocus in the central field of view, provides a certain amount of defocus in the peripheral field of view, and keeps the optical axis of the entire microlens consistent is easy to arrange the microlenses on the overall lens. It can not only meet the requirements of optometric design, but also further flexibly adjust the curvature radius (or aspheric parameters) of each segment and the diameter ratio of each segment according to actual needs to obtain different dioptric powers or refractive power distributions. This zoned optical design can achieve richer and more refined defocus and scattering effects.

[0040] Exemplarily, the dioptric power of each aspherical mirror in the microlens can also be designed to increase or decrease according to different requirements. Taking a microlens formed by splicing three aspherical mirrors with different curvatures up and down as an example, the dioptric power of the topmost aspherical mirror is set to +5D, the dioptric power of the second-layer aspherical mirror is set to +4D, and the dioptric power of the third-layer aspherical mirror is set to +3D; or, the dioptric power of the topmost aspherical mirror is set to -5D, the dioptric power of the second-layer aspherical mirror is set to +2D, and the dioptric power of the third-layer aspherical mirror is set to +3D. An increase or decrease in dioptric power can both produce a "myopic defocus" or "positive defocus" effect. When the eye axis has eccentric viewing, the peripheral retina can receive positive defocus signals from these microlenses, further inhibiting the excessive growth of the anteroposterior diameter of the eyeball.

[0041] Exemplarily, the surface of the microlens is a spherical surface, an aspherical surface or a freeform surface. The aspherical microlens is usually a rotationally symmetric surface microlens composed of conic curves. The rotation axis of the conic curve is the optical axis of the microlens. The surface of the microlens can also be a freeform surface obtained by rotating an arbitrary curve around an axis. The surface of the microlens can be customized according to requirements, and the embodiments of the present invention do not limit this.

[0042] Exemplarily, the material for making the microlens needs to have low surface energy and hydrophobicity, and exhibit good mechanical and thermal properties at high temperatures, while providing good surface finish. Generally, polydimethylsiloxane (PDMS), polymethyl methacrylate (PMMA), photoresist, silicon dioxide (SiO2), etc. are selected.

[0043] Exemplarily, the preparation process of the microlens of the present invention generally includes the following steps. The whole process is a conventional technical means in the art, and the preparation process is not limited thereto:

[0044] (1) Microlens mold making: Using ultra-precision turning, laser direct writing or nanoimprinting technology, a microlens structure spliced by multiple aspherical mirrors is processed on the surface of a metal / glass mold; in addition, for high-order defocus lenses, the curvature center positions of each aspherical mirror in the microlens need to be predefined in the numerical control program.

[0045] (2) Lens forming: Inject optical resin into the prefabricated microlens mold by injection molding or casting, and then perform film lamination to form a microlens structure with multiple aspherical lens layers laminated.

[0046] (3) The last step is usually the preparation of the functional film layer on the surface of the microlens. For example, AR coating can reduce reflection and improve light transmittance; anti-blue light / anti-ultraviolet film belongs to a targeted functional film; anti-scratch coating can improve surface durability.

[0047] The imaging principle and optical effect of the microlens are as follows:

[0048] 1) It can reduce the contrast of retinal imaging: By adopting the multi-segment splicing method, the direct connection between the segments will cause certain scattering and spectral diffusion optically; and the decentration / tilt design of the connection line of the curvature centers and the optical axis makes the light pass through the microlens and form a more complex image on the peripheral retina, which is beneficial to reducing the peripheral contrast. This design method can significantly reduce the imaging contrast in the peripheral area while ensuring the overall relative transparency of the lens.

[0049] 2) Provide stronger peripheral retinal myopic defocus: On the one hand, if multiple arc segments are all designed with positive diopters, a superimposed positive diopter range is formed between different segments, enabling the accumulation of positive defocus; on the other hand, the decentration / tilt design of the connecting line of the curvature centers with respect to the optical axis can provide a higher diopter for the decentration direction, thereby enhancing the defocus effect. When the eye rotates or fixates on an off-axis target, these microlenses can effectively stimulate the peripheral retina and inhibit excessive growth of the eye axis.

[0050] 3) Diversified optical zone regulation: By splicing arc mirrors with different curvatures (plus powers), the same arc segment exhibits different effective diopters at different fixation angles, thereby meeting the personalized needs of different myopia degrees or different age groups.

[0051] An embodiment of the present invention also provides a high-order defocus lens, including: a base lens, and microlenses disposed on the base lens. The base lens is divided into an optical zone and a microlens zone surrounding the optical zone, and the microlens zone is used to arrange all the microlenses.

[0052] Exemplarily, the outer contours of the base lens, the microlens zone, and the optical zone are all circular. The diameter range of the base lens is 50 - 90 mm, preferably 60 - 80 mm; the diameter range of the microlens zone is 20 - 60 mm, preferably 30 - 50 mm; the diameter range of the optical zone is 5 - 15 mm, preferably 6 - 9 mm. The optical zone is provided to meet the clear vision requirement in the straight-ahead direction.

[0053] Exemplarily, the microlenses are arranged in multiple layers around the optical zone, and each layer of microlenses is arranged in a ring shape. Referring to Figure 11 , two different arrangement methods are exemplarily given:

[0054] The first arrangement method, as shown in Figure A of Figure 11 , the microlens zone has multiple wavy annuli, which are arranged around the central optical zone, and the multiple wavy annuli are configured on the base lens in a concentric annulus manner. The wavy annulus is composed of a series of alternating raised parts and recessed parts, and the transition between adjacent raised parts and recessed parts is smooth, such that the contour of the wavy annulus in the circumferential direction (i.e., the circular direction) presents continuous wave crests and wave troughs with the same trend.

[0055] The second arrangement method, as shown in Figure B of Figure 11 , the microlens zone also has multiple wavy annuli, and the difference in its structure from that of Figure A is that: the wave crests in adjacent two wavy annuli are staggered in the circumferential direction (i.e., the circular direction), and the wave troughs in adjacent two wavy annuli are staggered in the circumferential direction (i.e., the circular direction).

[0056] The arrangement method of the microlenses of the present invention on the base lens is not limited to the above two types, and there are also concentric ring arrangements, bead-like radial arrangements, etc.

[0057] Several specific examples of the high-order defocus lens of the present invention are given below:

[0058] Figure 3 and Figure 4 is a schematic structural diagram of the first high-order defocus lens of the embodiment of the present invention. Referring to Figure 3 , in the high-order defocus lens, each microlens is formed by splicing two aspherical mirrors up and down, and the connecting line of the centers of curvature of the two aspherical mirrors is the optical axis of each. Referring to Figure 4 , the optical axes of the multiple microlenses arranged on the base lens (the arrangement method is Figure 11 A in) intersect at a point on the side of the base lens close to the human eye.

[0059] Figure 5 and Figure 6 is a schematic structural diagram of the second high-order defocus lens of the embodiment of the present invention. Referring to Figure 5 , in the high-order defocus lens, each microlens is formed by splicing three aspherical mirrors up and down, and the connecting lines of the centers of curvature of the three aspherical mirrors in pairs are the same straight line, but all deviate from their respective optical axes. Referring to Figure 6 , the optical axes of the multiple microlenses arranged on the base lens (the arrangement method is Figure 11 A in) intersect at three points on the side of the base lens close to the human eye.

[0060] Figure 7 and Figure 8 is a schematic structural diagram of the third high-order defocus lens of the embodiment of the present invention. Referring to Figure 7 , in the high-order defocus lens, each microlens is formed by splicing three aspherical mirrors up and down, and the connecting lines of the centers of curvature of the three aspherical mirrors in pairs form three different straight lines, but only one of the connecting lines of the centers of curvature of the three aspherical mirrors in pairs overlaps with the optical axes of two of the aspherical mirrors. Referring to Figure 8 , the optical axes of the multiple microlenses arranged on the base lens (the arrangement method is Figure 11 A in) intersect at two points on the side of the base lens close to the human eye.

[0061] Figure 9 and Figure 10 is a schematic structural diagram of the third high-order defocus lens of the embodiment of the present invention. Referring to Figure 9 , in the high-order defocus lens, there are two structures of microlenses: one is that each microlens is formed by splicing two aspherical mirrors up and down, and the connecting line of the centers of curvature of the two aspherical mirrors is the optical axis of each; the other is that each microlens is formed by splicing three aspherical mirrors up and down, and the connecting line of the centers of curvature of the three aspherical mirrors is the optical axis of each. Referring to Figure 10 , the optical axes of the multiple microlenses arranged on the base lens (the arrangement method is Figure 11 A in) intersect at two points on the side of the base lens close to the human eye.

[0062] Perform an RMS contrast test on the high-order defocus lens shown in Figure 3 and Figure 4 . The test method is as follows:

[0063] (1) Test tool: CCD imaging device; Lens fixture: 72mm lens chute, with a 5mm hole in the center as the pupil;

[0064] (2) RMS contrast calculation formula: where σ represents the RMS contrast (standard deviation of pixel intensity values); N represents the total number of pixels in the image; x i represents the intensity value of the i-th pixel; μ represents the average value of all pixel intensity values in the image. The RMS contrast focuses more on the statistical characteristics of the entire image.

[0065] (3) Measurement method:

[0066] Step 1, Prepare two high-order defocus lenses. One of the high-order defocus lenses is the lens provided by the present invention Figure 3 and Figure 4 . In this high-order defocus lens, the specific parameters of each unit are as follows: the diameter range of the base lens is 80mm, the diameter of the microlens area is 50mm, and the diameter of the optical zone is 9mm; the diopter of the optical zone = -3D; in the microlens, the diameter of the topmost aspherical mirror is 0.6mm, and the diameter of a single microlens is 1.2mm. The diopter of the topmost aspherical mirror is +4D, the additional diopter is +7D, and the diopter of another aspherical mirror is +1D, and the additional diopter is +4D; both layers of aspherical mirrors are spherical microlenses; among the 10 arranged wavy annuli formed by the microlens area, within each wavy annulus, adjacent microlenses are tangent, and the distance R between adjacent wavy annuli satisfies: R = 4 × D, where D is the diameter of the microlens.

[0067] The other one is a high-order defocus lens obtained by the method disclosed in Patent CN202311567282.9. Its microlens area uses a single-layer spherical microlens with a diameter of 1.2mm and a diopter of +4D, and other parameters are the same as above.

[0068] First, place the lens to be tested at the center of the fixture, then fix the fixture in front of the camera (using a UV filter to protect the lens), and place the monitor in front of the fixture;

[0069] Step 2, Adjust the camera magnification until the pupil area fills the field of view and there is no shadow occlusion around; Display a stripe target on the monitor, manually adjust the camera focus, and keep all parameters locked after the focus is completed,...;

[0070] Step 4: Adjust the magnifications of the streak targets to 1x, 1.50x, 2.00x, 3.00x, 4.00x, 5.00x, 6.00x, 7.00x, 8.00x, and take photos at each magnification to obtain 9 images in sequence: C1, C2, C3, ……, C9;

[0071] Step 5: Lift the lens to be measured and place it on the spacer so that the lens to be measured is lifted by 10 mm. Keep all settings and parameters unchanged, and take another photo of the streak target. Adjust the magnifications to 1x, 1.50x, 2.00x, 3.00x, 4.00x, 5.00x, 6.00x, 7.00x, 8.00x, and take photos at each magnification to obtain 9 images in sequence: P1, P2, P3, ……, P9;

[0072] Step 6: In the above contrast measurement program, pair and load (C1, P1), (C2, P2), (C3, P3) …… (C9, P9) in combination with the RMS contrast calculation formula for calculation. This calculation process is a conventional data processing process and will not be explained in detail here. The calculation results are shown in Table 1 and Figure 12 as follows.

[0073] Table 1

[0074]

[0075] As can be seen from Table 1 and Figure 12 compared with the high-order defocus lens of CN202311567282.9, the contrast of the high-order defocus lens of the present invention can be further reduced. Based on the above results, the microlens of the present invention can reduce the imaging contrast compared with the existing single-layer spherical microlens, especially in the medium and low frequency regions, the contrast can be further reduced.

[0076] Furthermore, the embodiment of the present invention also provides a pair of glasses, including a glasses frame and a high-order defocus lens fixed on the glasses frame. The glasses provided by the embodiment of the present invention have the corresponding beneficial effects of the high-order defocus microlens provided by the embodiment of the present invention, which will not be elaborated here.

[0077] In summary, the present invention combines multi-arc microlenses with high-order defocus microlenses, providing a new idea for myopia control frame lenses: firstly, by multi-arc splicing, the peripheral scattering and defocus effects are improved; secondly, by the eccentricity or inclination of the optical axis of the microlens, high-order defocus is achieved and stronger or directional positive defocus is generated; thereby simultaneously reducing the imaging contrast of the peripheral retina and more effectively inhibiting the myopia signal.

[0078] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A microlens, characterized in that, It is formed by vertically splicing at least two aspherical mirrors with different curvatures, and all the aspherical mirrors form at least one optical axis.

2. The microlens according to claim 1, wherein, The number of the aspherical mirrors is 2 to 4, preferably 2 to 3.

3. The microlens according to claim 1 or 2, characterized in that, The curvature of the aspherical mirror at the top layer is greater than that of other aspherical mirrors; and / or, the diameter range of the top layer aspherical mirror is 0.2 to 1.0 mm, preferably 0.3 to 0.6 mm.

4. The microlens according to claim 3, wherein, The plus power of the top layer aspherical mirror is 2 to 4 D higher than that of other aspherical mirrors.

5. The microlens according to claim 4, wherein In the microlens, the plus power of the top layer aspherical mirror is +5 D to +9 D, and the plus power of other aspherical mirrors is +2 D to +5 D; or, in the microlens, the plus power of the top layer aspherical mirror is -6 D to +1 D, and the plus power of other aspherical mirrors is +2 D to +5 D.

6. The microlens according to any one of claims 1 to 5, characterized in that, The surface of the microlens is a spherical surface, an aspherical surface or a freeform surface; and / or, the diameter range of the microlens is 0.5 to 2.0 mm, preferably 0.8 to 1.2 mm.

7. A high-order defocusing lens, characterized in that, It includes: A base lens, and a plurality of microlenses according to any one of claims 1 to 6 provided on the base lens, the base lens is divided into an optical zone and a microlens zone surrounding the optical zone, and the microlenses are provided in the microlens zone.

8. The high-order defocusing lens according to claim 7, wherein The microlenses are arranged in multiple layers around the optical zone, and each layer of microlenses is arranged in a ring.

9. The high-order defocus lens according to claim 7 or 8, wherein The planar profiles of the base lens, the microlens zone and the optical zone are all circular, the diameter range of the base lens is 50 to 90 mm, preferably 60 to 80 mm; the diameter range of the microlens zone is 20 to 60 mm, preferably 30 to 50 mm; the diameter range of the optical zone is 5 to 15 mm, preferably 6 to 9 mm.

10. A pair of glasses, characterized in that, It includes an eyeglass frame and a high-order defocus lens according to any one of claims 7 to 9 fixed on the eyeglass frame.

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