Out-of-focus lens and glasses applying same

Abstract

The invention relates to an out-of-focus lens and glasses using the same, the out-of-focus lens comprises a main lens, and the light inlet side of the main lens is provided with a central circular correction area, a near-center out-of-focus area and a far-center out-of-focus area; the near-center defocusing area comprises a plurality of near-center annular correction areas and a plurality of near-center annular defocusing areas which are alternately distributed in the radial direction of the main lens, and the near-center annular defocusing areas are provided with a plurality of spherical micro lenses which are uniformly distributed in the circumferential direction of the main lens; the far-center defocusing area comprises a plurality of far-center annular correction areas and a plurality of far-center annular defocusing areas which are alternately distributed along the radial direction of the main lens; and the far-center annular defocusing areas are provided with a plurality of aspheric micro lenses which are uniformly distributed along the circumferential direction of the main lens. The out-of-focus lens can reduce the strip-shaped distortion condition of edge out-of-focus image points and eliminate off-axis aberration, so that distortion and astigmatism influences caused by a large view field are reduced, the out-of-focus effect is guaranteed, and meanwhile the development of myopia is delayed.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a defocused lens and glasses using the same. Background Art

[0002] Existing myopia prevention and control technologies are based on the theory of peripheral defocus. Usually, myopic patients who wear ordinary single-vision lenses have adequate central vision correction, and the image can be clearly projected onto the retina, but its peripheral projection is behind the retina. This phenomenon is called peripheral hyperopic defocus of the retina. This defocus state induces the eyeball to self-adjust, which causes the retina to grow backwards, the axial length of the eye to further increase, and myopia to deepen. Studies have shown that by correcting peripheral hyperopic defocus of the retina, the axial growth of the eye can be controlled and the progression of myopia can be delayed. Therefore, through the special design of the lens and the increase of the peripheral refractive power of the lens, the hyperopic defocus of the retina can be pulled back in front of the retina, thereby controlling the progression of myopia.

[0003] However, the existing defocus microlenses use spherical lenses. For single-piece lenses, the off-axis aberrations of the spherical lenses will become serious under the condition of large field of view, namely coma, distortion and astigmatism, which will cause the edge defocused image points to become distorted, affecting the final defocus effect. Summary of the invention

[0004] The present application provides a defocus lens and glasses using the same, so as to solve the technical problems of the existing defocus lens having serious off-axis aberration under a large field of view and distortion of edge defocused image points.

[0005] In the first aspect, the present application provides a defocus lens, including a main lens, wherein the light-entering side of the main lens is provided with a central circular correction zone, a near-center defocus zone and a far-center defocus zone; the near-center defocus zone includes a plurality of near-center annular correction zones and a plurality of near-center annular defocus zones alternately distributed along the radial direction of the main lens, and the near-center annular defocus zone has a plurality of spherical microlenses uniformly distributed along the circumference of the main lens; the far-center defocus zone includes a plurality of far-center annular correction zones and a plurality of far-center annular defocus zones alternately distributed along the radial direction of the main lens, and the far-center annular defocus zone has a plurality of aspherical microlenses uniformly distributed along the circumference of the main lens.

[0006] In a possible implementation, the minimum inner ring diameter d of the far-center annular defocusing zone is min , obtained by the following formula:

[0007]

[0008] Among them, θ is the average field of view angle obtained from the simulation experiment, h is the height of the light passing through the light-emitting side of the main lens at the average field of view angle, t is the thickness of the main lens corresponding to the average field of view angle, n is the material refractive index of the main lens, and r is the radius of curvature of the light-emitting side of the main lens.

[0009] In a possible implementation, the minimum inner ring diameter of the far-center annular defocusing zone is ≥22 mm.

[0010] In a possible implementation, the defocus range of the spherical microlens and the aspherical microlens is +2D to +5D, the defocus of the microlenses in different areas is different, and the defocus of the aspherical microlens and the defocus of the spherical microlens increase as the distance from the corresponding area to the center of the main lens increases.

[0011] In a possible implementation, the defocus amount of the spherical microlens in the near-center annular defocus area is +3D to +4D.

[0012] In a possible implementation, the defocus amount of the aspherical microlens in the near-center annular defocus area is +4D to +5D.

[0013] In a possible implementation, the near-center defocus area and the far-center defocus area are distributed in a circular or polygonal shape around the center of the main lens.

[0014] In a possible implementation, the width of any proximal annular correction zone and any distal annular correction zone is 0.5 mm to 1.2 mm.

[0015] In a possible implementation, the bottom diameter D1 of the spherical microlens is 0.5 mm to 2 mm, and the height thereof is 0.3 μm to 1.7 μm.

[0016] In a possible implementation, the bottom diameter D2 of the aspherical microlens is 0.5 mm to 2 mm, and the height thereof is 0.3 μm to 1.7 μm.

[0017] In a possible implementation, the design equation of the even-order aspheric surface of the aspheric microlens is:

[0018]

[0019] Where X(ρ) represents the vertical distance from a point on the aspheric surface at a distance ρ from the optical axis to the tangent plane at the vertex of the aspheric surface; c represents the curvature of the reference sphere at the vertex of the aspheric surface; ρ represents the horizontal distance from the optical axis; k is the cone constant; A 2i is the higher-order term ρ 2i Aspheric coefficient, n represents an integer greater than 1, and i represents an integer greater than 0.

[0020] In a possible implementation, the spherical micro-lens and the aspherical micro-lens are integrally injection-molded with the main lens.

[0021] In a second aspect, the present application provides a pair of glasses comprising the above-mentioned defocused lenses.

[0022] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0023] The defocus lens provided by the embodiment of the present application, by setting an aspherical micro-lens at the far center of the main lens, makes the far center annular defocus area generate multiple retinal images along the radial direction of the main lens at the far center periphery of the retina, forming normal point-like defocused image points under a large field of view, reducing the strip-like distortion of the edge defocused image points, eliminating off-axis aberrations, thereby reducing the distortion and astigmatism caused by the large field of view, optimizing the shape of the defocused image points under the large field of view, and ensuring the defocusing effect. At the same time, through the alternating distribution of the defocus area and the correction area, the development of myopia can be delayed under the condition of meeting the refractive power of the corrective glasses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 A schematic diagram of the structure of a defocus lens provided in an embodiment of the present application;

[0028] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A area;

[0029] Figure 3 for Figure 1 A side view of the through-focus lens is shown;

[0030] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle B area;

[0031] Figure 5 The figure is a schematic diagram of focusing of the defocused image point of the existing defocused lens using ordinary spherical microlenses under a large field of view.

[0032] Description of reference numerals:

[0033] 1. Main lens; 11. Central circular correction zone; 12. Near-center defocus zone; 121. Near-center annular correction zone; 122. Near-center annular defocus zone; 122a. Spherical microlens; 13. Far-center defocus zone; 131. Far-center annular correction zone; 132. Far-center annular defocus zone; 132a. Aspherical microlens. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0037] The existing defocus microlenses use spherical lenses. For a single lens, the off-axis aberrations of the spherical lens will become serious in the case of a large field of view, namely coma, distortion and astigmatism, which will cause the edge defocused image points to become distorted, affecting the final defocus effect. Although, the effect of eliminating some off-axis aberrations can be achieved through a specific combination of microlenses and main lenses. Such a specific combination can be solved by the following equation (taking astigmatism elimination as an example):

[0038]

[0039] In the formula, D0 is the additional refractive power of the microlens, D1 is the focal length of the front surface (light-entering side) of the main lens, n represents the refractive index of the main lens material, and v represents the aperture position. When the microlens and the main lens 1 are both spherical lenses, the surface cone coefficient k1=k2=0, and the above formula is equivalent to an ellipse equation. The resulting D1-D0 curve is called the Tsherning ellipse. For a certain focal length D1 of the front surface of the main lens, there are only two specific solutions for eliminating astigmatism. However, the defocus lens needs to provide sufficient myopic defocus for the peripheral field of view while ensuring sufficient correction in the central area in order to achieve the purpose of delaying myopia. Often, the two specific solutions of the Tsherning ellipse cannot simultaneously meet the needs of eliminating off-axis aberrations and sufficient correction of peripheral myopic defocus in the center of the myopia prevention and control lens. However, for aspheric microlenses, k1≠0. When the additional refractive power D0 of the aspheric microlens is constant, there are infinite solutions by changing the value of k1. In this case, by applying aspheric microlenses, it is possible to eliminate off-axis aberrations under a large field of view while ensuring sufficient peripheral defocus.

[0040] In order to solve the technical problems in the prior art that spherical microlenses have serious off-axis aberrations and distorted edge defocused image points under a large field of view, the present application provides a defocus lens and glasses using the same, which can reduce the strip distortion of edge defocused image points, eliminate off-axis aberrations, reduce the distortion and astigmatism caused by a large field of view, optimize the shape of defocused image points under a large field of view, and ensure the defocus effect.

[0041] Figures 1 to 4 A defocus lens provided for an embodiment of the present application includes a main lens 1, the center of the main lens 1 is the optical center, the convex side of the main lens 1 is the light-incoming side, and the concave side is the light-outgoing side. The light-incoming side of the main lens 1 is provided with a central circular correction area 11, a near-center defocus area 12, and a far-center defocus area 13. The near-center defocus area 12 and the far-center defocus area 13 both refer to the distance of the position of the defocus area relative to the optical center of the main lens 1. The defocus area with a smaller distance from the optical center of the main lens 1 is referred to as the "near-center defocus area 12", and the defocus area with a larger distance from the optical center of the main lens 1 (i.e., the area close to the edge of the main lens 1) is referred to as the "far-center defocus area 13".

[0042] The near-center defocusing zone 12 includes a plurality of near-center annular correction zones 121 and a plurality of near-center annular defocusing zones 122 alternately distributed radially along the main lens 1. The plurality of near-center annular correction zones 121 and the plurality of near-center annular defocusing zones 122 are concentrically distributed. The near-center annular defocusing zone 122 has a plurality of spherical microlenses 122a uniformly distributed circumferentially along the main lens 1. The spherical microlenses 122a form an annular belt with the optical center of the main lens 1 as the center.

[0043] The far-center defocusing zone 13 includes a plurality of far-center annular correction zones 131 and a plurality of far-center annular defocusing zones 132 which are alternately distributed radially along the main lens 1. The plurality of far-center annular correction zones 131 and the plurality of far-center annular defocusing zones 132 are concentrically distributed. The far-center annular defocusing zone 132 has a plurality of aspheric microlenses 132a which are uniformly distributed circumferentially along the main lens 1.

[0044] It can be understood that the central circular correction area 11, the near-center annular correction area 121 and the far-center annular correction area 131 are used to correct the refractive power of the eye's refractive error, and the near-center annular defocusing area 122 and the far-center annular defocusing area 132 are used to image the incident light in front of the retina, effectively delaying the development of myopia. A defocus lens provided in an embodiment of the present application is provided by arranging an aspherical microlens 132a at the far-center position of the main lens 1, so that the far-center annular defocusing area generates multiple retinal images along the radial direction of the main lens 1 at the far-center periphery of the retina, forming a normal point-like defocused image point under a large field of view, reducing the strip-like distortion of the edge defocused image point, eliminating the off-axis aberration, thereby reducing the distortion and astigmatism caused by the large field of view, optimizing the shape of the defocused image point under the large field of view, ensuring the defocusing effect, and improving the comfort of the user wearing the lens. At the same time, through the alternating distribution of the defocusing area and the correction area, the development of myopia can be delayed while meeting the refractive power of the refractive error of the corrective glasses.

[0045] Furthermore, Zemax optical design software is used to simulate the focusing of defocused image points under different field angles using ordinary spherical microlenses, such as Figure 5 As shown, Figure 5 (a) and Figure 5 (b) shows the focusing of the defocused image point of the defocus lens using an ordinary spherical microlens under a ±21° field of view. Figure 5 (c) and Figure 5 (d) shows the focusing of the defocused image points of the defocused lens with ordinary spherical microlenses under the field of view of ±16°. It can be seen that when the incident field of view is greater than 16° or greater than 21°, the defocused image points are affected by large astigmatism and coma, and are no longer point-shaped, but strip-shaped. The above defects will cause blurring and dizziness in the peripheral vision when turning the eyeball while wearing this lens.

[0046] In order to improve the blur and dizziness caused by the above-mentioned defocus lens under the field of view angle, the position, size and shape of the near-center defocus area 12 using the spherical microlens 122a and the far-center defocus area 13 using the aspherical microlens 132a of the defocus lens are designed one by one.

[0047] according to Figure 5 As shown in the defocusing diagram of the ordinary spherical microlens, obvious aberration appears at the lower edge of the 16° field of view and the upper edge of the 21° field of view. It is only necessary to start arranging the aspherical microlens 132a at a certain position on the light-entering side of the main lens 1 corresponding to the average field angle of 18.5 of these two fields of view. This position corresponds to the minimum diameter d of the inner ring of the aspherical surface. min , can be obtained by the following formula:

[0048]

[0049] Among them, θ is the average field of view angle at which obvious aberration occurs obtained through simulation experiments, h is the height of the light passing through the light-emitting side of the main lens 1 under the field of view, and since the common distance between the light-emitting side of the main lens 1 and the eyeball is 12 mm and the geometric relationship, h=12tan18.5°, t is the thickness of the main lens 1 corresponding to the average field of view angle, n is the material refractive index of the main lens, and r is the radius of curvature of the light-emitting side of the main lens.

[0050] In other words, the dividing line between the spherical microlens 122a and the aspherical microlens 132a is a circle with a diameter d and a center of the main lens 1. min The circle, d min The microlenses on the rings are aspherical, and the number of rings is determined by the size and spacing of the microlenses and the thickness t of the main lens 1 at the position corresponding to the average field of view. Figure 1 As shown, according to the size of the microlens in this application, taking the main lens 1 with a diameter of 75 mm and a thickness of 10.5 mm at the position of the main lens 1 corresponding to the average field angle as an example, the minimum inner ring diameter d of the far-center annular defocusing area 132 is calculated according to Formula 2 min The diameter of the 5th ring of microlenses is 22mm, so we designed 13 rings of microlenses. The diameter of the 5th ring of microlenses is already greater than 22mm. Then the inner 4 rings close to the center of the main lens 1 are spherical microlenses 122a, and the remaining outer 9 rings are aspherical microlenses 132a.

[0051] By placing the lens at a distance greater than or equal to d from the center of the main lens 1 min The aspherical microlens 132a is set at the edge area of ​​d minThe spherical microlens 122a is retained in the central area, which can eliminate the off-axis aberration at the edge of the main lens 1 under a large field of view compared to the existing design, reduce the blur and dizziness caused by the user's peripheral vision when turning the eyeball while wearing this defocused lens, and improve the user's comfort when wearing the lens.

[0052] In some implementations, such as Figure 1 As shown, when the near-center defocusing area 12 and the far-center defocusing area 13 are distributed in a circular shape around the center of the main lens 1, the far-end annular defocusing area 132 is correspondingly annular, and the minimum inner ring diameter d of the far-end annular defocusing area 132 is min ≥22mm.

[0053] In some implementations, when the near-center defocusing area 12 and the far-center defocusing area 13 are distributed in a polygonal or asymmetrical manner around the center of the main lens 1, such as a honeycomb distribution, the far-center annular defocusing area 132 is correspondingly polygonal. According to the same design concept and the above calculation formula, the diameter d of the minimum inscribed circle of the far-center annular defocusing area 132 can also be calculated. min The near-center defocusing area 12 and the far-center defocusing area 13 with polygonal or asymmetrical distribution can provide defocusing adjustment for different refractive states.

[0054] In some embodiments, when the near-center defocusing area 12 and the far-center defocusing area 13 are distributed in a polygonal or asymmetrical manner around the center of the main lens 1, such as a honeycomb distribution, the diameter d of the minimum inscribed circle of the far-center annular defocusing area 132 is min ≥22mm.

[0055] In some embodiments, the defocus amount of the spherical microlens 122a and the aspherical microlens 132a ranges from +2D to +5D, the defocus amount of the spherical microlens 122a in the same near-center annular defocus area 122 is the same, the defocus amount of the aspherical microlens 132a in the same far-center annular defocus area 132 is the same, the defocus amount of the microlenses in different areas is different, and the defocus amount of the aspherical microlens 132a and the defocus amount of the spherical microlens 122a increase as the distance from the corresponding area to the center of the main lens 1 increases.

[0056] A large defocus amount leads to a good myopia prevention and control effect, but at the same time the visual quality will decrease; a small defocus amount leads to a good visual quality, but the myopia prevention and control effect will decrease. By setting a suitable defocus amount, the change of the additional diopter of the spherical lens and the aspherical microlens 132a from the center to the edge of the lens conforms to the change of the defocus amount from the center to the edge of the human eye, so that the myopia prevention and control effect is better while ensuring a good visual quality.

[0057] In some embodiments, the defocus amount of the spherical microlens 122a near the center annular defocusing area 122 is +3D to +4D. This design is based on the consideration that the closer to the center of the main lens 1, the less defocus amount is required, and the better the visual quality is required. Under the premise of ensuring the visual quality of the center, the overall defocusing effect is improved.

[0058] In some embodiments, the defocus amount of the aspherical microlens 132a near the center annular defocusing area 122 is +4D to +5D. Such a design is based on the fact that the edge area of ​​the main lens 1 requires a relatively large defocus amount and a better defocus quality, thereby improving the overall defocus effect and obtaining a better myopia prevention and control effect.

[0059] In some embodiments, Figure 4 As shown, the width B of any proximal annular correction zone 121 and any distal annular correction zone 131 is 0.4 mm to 1.1 mm.

[0060] In some embodiments, the bottom diameter D1 of the spherical microlens 122 a is 0.5 mm to 2 mm, and the height thereof is 0.3 μm to 1.7 μm.

[0061] In some embodiments, the bottom diameter D2 of the aspherical microlens 132 a is 0.5 mm to 2 mm, and the height thereof is 0.3 μm to 1.7 μm.

[0062] In some embodiments, the design equation of the even-order aspheric surface of the aspheric microlens 132a is:

[0063]

[0064] Where X(ρ) represents the vertical distance from a point on the aspheric surface at a distance ρ from the optical axis to the tangent plane at the vertex of the aspheric surface; c represents the curvature of the reference sphere at the vertex of the aspheric surface; ρ represents the horizontal distance from the optical axis; k is the cone constant; A 2i is the higher-order term ρ 2i Aspheric coefficient, N represents an integer greater than 1, and i represents an integer greater than 0.

[0065] Aspheric coefficient A 2i It is determined by the additional refractive power D0 of the aspherical microlens 132a in the corresponding area. Assuming S(ρ) is the meridian focal power, A 2i The value range is calculated by formula 1 and formula 4:

[0066] S(ρ)=(n-1)(d 2 X / Dρ 2 ) / {1+(dX / dρ) 2} 3 / 2 (Formula 4)

[0067] Where n represents the refractive index of the aspherical microlens material. Since the aspherical microlens is integrally formed with the main lens, the refractive index of the material is consistent, and the optical power D in diopters satisfies the following conditions:

[0068] In the range of 0≤ρ≤1.1 mm, D=D0, -0.3≤ΔS≤0.3, ΔS is the difference between the peripheral optical power and the central optical power of the aspherical surface.

[0069] After solving formula 1, the cone coefficient of the aspheric surface can be obtained. According to the defocus diopter requirement of the human eye, the curvature of the top of the aspheric surface (4-5D) can be obtained. In this way, combined with the curvature boundary condition of △S, A can be obtained. 2i The value range of , within which all values ​​meet the requirements.

[0070] Optionally, the spherical microlens 122 a and the aspherical microlens 132 a are integrally injection-molded with the main lens 1 .

[0071] Optionally, the main lens 1 can be made of polycarbonate (PC), and the micro lens can be made of one of acrylic resin (PMMA), polyethylene terephthalate (PET) or polycarbonate (PC).

[0072] Taking the main lens 1 with a diopter of -4D as an example, the focal length of the front surface (light-entering side) of the main lens 1 is 1D, and the focal length of the rear surface (light-exiting side) is 5D. The microlens parameters of the near-center defocusing area 12 and the far-center defocusing area 13 are shown in the following table:

[0073] Table 1. Microlens parameters of near-center defocusing area 12 and far-center defocusing area 13

[0074] Ball lens parameters Aspheric lens parameters Optical power: +4D Optical power: +5D Microlens diameter: 0.9mm Microlens diameter: 0.9mm Vertex reference spherical curvature c: 0.00683 Vertex reference spherical curvature c: 0.00854 Cone coefficient k: 0 Cone coefficient k: -2.324 Aspheric coefficient A2: 0 Aspheric coefficient A2: 1.701e-3 Aspheric coefficient A4: 0 Aspheric coefficient A4: -1.741e-5 Aspheric coefficient A6: 0 Aspheric coefficient A6: 7.188e-8

[0075] An embodiment of the present application provides a pair of glasses, comprising the defocused lens as described above and a glasses frame connected thereto.

[0076] In some embodiments, the preparation process of the defocused lens may include: using a metal or glass mold to make a lens blank using an injection molding or casting one-piece molding process, and then processing the rear surface of the blank in a lathe to make the required eyeglass lens; or using a metal and glass mold to make a lens blank using a UV light curing process, and then processing the surface of the blank in a lathe to make the eyeglass lens required by the wearer; or using a metal and glass mold to make a lens patch using a UV light curing process, and then making the lens or lens blank through a bonding process.

[0077] In some embodiments, the defocused lens obtained by the above process can be further prepared into glasses after being combined with a glasses frame. The shape of the defocused lens can be round, square, elliptical or other special-shaped structures.

[0078] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0079] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0080] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A defocus lens, characterized in that: include: A main lens, wherein a central circular correction area, a near-center defocusing area, and a far-center defocusing area are provided on the light-entering side of the main lens; The near-center defocusing area includes a plurality of near-center annular correction areas and a plurality of near-center annular defocusing areas alternately distributed along the radial direction of the main lens, and the near-center annular defocusing area has a plurality of spherical micro-lenses uniformly distributed along the circumference of the main lens; The far-center defocusing zone includes a plurality of far-center annular correction zones and a plurality of far-center annular defocusing zones alternately distributed along the radial direction of the main lens. The far-center annular defocusing zone has a plurality of aspherical microlenses uniformly distributed along the circumference of the main lens.

2. The defocus lens according to claim 1, characterized in that: The minimum inner ring diameter d of the far-center annular defocusing area min , obtained by the following formula: Among them, θ is the average field of view angle obtained from the simulation experiment, h is the height of the light passing through the light-emitting side of the main lens at the average field of view angle, t is the thickness of the main lens corresponding to the average field of view angle, n is the material refractive index of the main lens, and r is the radius of curvature of the light-emitting side of the main lens.

3. The defocus lens according to claim 2, characterized in that: The minimum inner ring diameter d of the far-center annular defocusing area min ≥22mm.

4. The defocus lens according to claim 1, characterized in that: The defocus range of the spherical microlens and the aspherical microlens is +2D to +5D, and the defocus of microlenses in different areas is different. The defocus of the aspherical microlens and the defocus of the spherical microlens increase as the distance from the corresponding area to the center of the main lens increases.

5. The defocus lens according to claim 4, characterized in that: The defocus amount of the spherical microlens in the near-center annular defocus area is +3D to +4D.

6. The defocus lens according to claim 4, characterized in that: The defocus amount of the aspherical microlens in the near-center annular defocusing area is +4D to +5D.

7. The defocus lens according to claim 1, characterized in that: The near-center defocusing area and the far-center defocusing area are distributed in a circular or polygonal manner around the center of the main lens.

8. The defocus lens according to claim 1, characterized in that: The width of any one of the proximal annular correction zones and any one of the distal annular correction zones is 0.5 mm to 1.2 mm.

9. The defocus lens according to claim 1, characterized in that: The bottom diameter D1 of the spherical microlens is 0.5 mm to 2 mm, and the height thereof is 0.3 μm to 1.7 μm.

10. The defocus lens according to claim 1, characterized in that: The bottom diameter D2 of the aspherical microlens is 0.5 mm to 2 mm, and the height thereof is 0.3 μm to 1.7 μm.

11. The defocus lens according to claim 1, characterized in that: The design equation of the even-order aspheric surface of the aspheric microlens is: The vertical distance of the point section; c represents the curvature of the reference sphere at the vertex of the aspheric surface; ρ represents the horizontal distance from the optical axis; k is the cone constant; A 2i is the higher-order term ρ 2i Aspheric coefficient, n represents an integer greater than 1, and i represents an integer greater than 0.

12. The defocus lens according to claim 1, characterized in that: The spherical microlens and the aspherical microlens are integrally formed with the main lens.

13. A pair of glasses, characterized in that: Comprising the defocus lens as described in any one of claims 1 to 12.

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