An asymptotic multi-element microlens spectacle lens and its design method

Abstract

The present invention discloses a progressive multi-element microlens spectacle lens and a design method thereof, relating to the field of optical equipment technology. The spectacle lens comprises a single-vision lens and a microlens array superimposed on any surface of the single-vision lens; the microlenses in the microlens array are arranged in a Fermat spiral pattern. The advantages of the Fermat spiral pattern are that the spacing between the microlenses in the microlens array is almost equal, resulting in a larger area ratio; and for different viewing angles, a sufficient number of microlenses and peripheral defocus are always guaranteed within the field of view.

Description

Technical Field

[0001] The present invention relates to the technical field of optical equipment, and in particular to a progressive multi-element micro-lens spectacle lens and a design method thereof. Background Art

[0002] Generally speaking, myopia of less than 300 degrees is considered mild, 300-600 degrees is considered moderate, and 600 degrees and above is considered high. There is now a consensus in the medical community that high myopia is one of the most important causes of blindness. Therefore, people with myopia must consciously control their myopia progression and maintain good eye hygiene to prevent it from developing into high myopia.

[0003] To prevent myopia, you first need to develop good living habits, avoid staying up late, avoid overwork, and avoid watching TV or looking at your phone for too long to avoid eye fatigue. Pay attention to eye cleanliness and hygiene, and try not to rub your eyes with your hands to avoid bacterial infection. Eating some fresh vegetables and fruits can also effectively prevent the occurrence of myopia. In addition, you can also use some medical methods, such as atropine eye drops, orthokeratology lenses (OK lenses), peripheral defocus lenses or contact lenses.

[0004] Atropine eye drops have a relaxing effect on the ciliary muscle. The ciliary muscle that has been in an accommodative state for a long time is in a relaxed state under the action of atropine, thereby delaying the development of myopia. It can also be used as a mydriatic drug during cataract surgery. However, long-term use of atropine eye drops can cause some harm to the eyes and the whole body. Orthokeratology lenses correct myopia by applying pressure to the cornea to reshape the cornea. However, daily wearing of orthokeratology lenses poses risks such as infection and dry eyes. There are relatively few adverse reactions when wearing peripheral defocus lenses, and their usability is greatly improved. Therefore, there are many types of peripheral defocus lenses on the market, but peripheral defocus lenses must usually be worn correctly under the guidance of a doctor, otherwise it may cause blurred vision and dizziness.

[0005] Currently, conventional microlens lenses have fixed microlens size and fixed add power. However, for wide field angles, as the aperture increases, the defocus at the periphery of the defocused image, which deviates from the axis, becomes inadequate. In this case, increasing the add power or defocus at the periphery to match the defocusing effect is necessary to ensure adequate defocus. Summary of the Invention

[0006] In response to the above-mentioned problems existing in the prior art, the present invention provides a progressive multi-element microlens spectacle lens and a design method thereof, which always ensures a sufficient number of microlenses and peripheral defocus within the field of view for different field angles.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] In a first aspect, the present invention provides a progressive multi-element microlens spectacle lens comprising a single vision lens and a microlens array superimposed on any surface of the single vision lens; wherein the multiple microlenses in the microlens array are arranged in a Fermat spiral.

[0009] Optionally, a partial area of the single-vision lens is a prescription optical zone, and a partial area of the microlens dot array is a defocused optical zone; the central diameter of the prescription optical zone is 5 to 15 mm; the outer diameter of the defocused optical zone is 20 to 50 mm, and the additional optical power of the defocused optical zone ranges from 0.5D to 5.5D.

[0010] Optionally, in an extension direction from the center of the single-vision lens to the edge of the single-vision lens, the aperture of each microlens gradually changes from small to large, and the additional optical power of each microlens gradually changes from small to large.

[0011] Optionally, the plurality of microlenses in the microlens array are linearly arranged on n divergent angle rays;

[0012] The divergence angle ray of the i-th item is the divergence angle α drawn from the pole in the polar coordinate system. i The polar coordinate system is a coordinate system established with the center point of the single vision lens as the pole, a horizontal ray as the polar axis, and a counterclockwise direction as the positive direction of the angle; the divergence angle α i The range is 0°~360°, the divergence angle α i and divergence angle α i-1 The difference is a constant value P, the constant value P ranges from 0 to 60°, and the value of n is 360° / P.

[0013] Optionally, in the polar coordinate system, the relationship between the aperture of the microlens and the position of the center point of the microlens follows a first formula; the first formula is:

[0014] d j =A j *R j *α i ;

[0015] d j R represents the aperture size of the jth microlens on the i-th divergent angle ray, j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, A j is the constant coefficient family of the jth microlens, A j The range is 0.1 to 2.0.

[0016] Optionally, in the polar coordinate system, the relationship between the additional optical power of the microlens and the radius of the center point of the microlens follows a second formula; the second formula is:

[0017] add j =B j *R j *α i ;

[0018] Among them, add j represents the additional light angle of the jth microlens on the i-th divergent angle ray, R j is the radius of the center point of the jth microlens, R j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, B j is the constant coefficient family of the jth microlens, B j The range is 0.1 to 2.0.

[0019] Optionally, in the polar coordinate system, the arrangement of the Fermat spiral follows a third formula, which is:

[0020]

[0021] Here, r is the radial distance, a is the angle from the zero-degree line, and k determines the tightness of the Fermat spiral.

[0022] Optionally, the mirror surface of the microlens is aspherical.

[0023] Optionally, the aspherical microlens is determined according to a fourth formula; the fourth formula is:

[0024]

[0025] With the vertex of the microlens mirror surface as the origin O and the central axis of a microlens as the Z axis, a spatial rectangular coordinate system is established; the X axis and Y axis of the spatial rectangular coordinate system are on the tangent plane of the microlens vertex, and the Z axis is the tangent plane of the microlens vertex. j (x) is the value in (R j , α i ) on the two-dimensional coordinate plane XZ, c is the reciprocal of the base spherical radius of curvature of the aspherical microlens, y is the vertical distance from any point on the curve to the X-axis, a1, a2, a3... are higher-order coefficients, and Q is the quadratic coefficient.

[0026] In a second aspect, the present invention provides a method for designing a progressive multi-element microlens spectacle lens, comprising:

[0027] Determining parameters of a single vision lens; the parameters of the single vision lens are the curvature of the front surface and the curvature of the back surface of the single vision lens, and the optical power of the single vision lens;

[0028] Constructing a polar coordinate system based on the single vision lens, and determining each divergence angle and the number of divergence angle rays according to the polar coordinate system;

[0029] Determine a Fermat spiral according to the polar coordinate system, and determine the number of microlenses and the position of the center point of each microlens according to the Fermat spiral; the intersection of the Fermat spiral and the divergent angle ray is the center point of the microlens;

[0030] Determining the additional optical power, aperture and surface parameters of each microlens;

[0031] A progressive multi-element microlens spectacle lens is prepared according to the parameters of the single vision lens, the number of the microlenses, the center point position of each microlens, the additional optical power, the aperture and the surface parameters.

[0032] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0033] The progressive multi-element microlens eyeglass lens provided by the present invention comprises a single-vision lens and a microlens array superimposed on any surface of the single-vision lens; the microlenses in the microlens array are arranged in a Fermat spiral pattern. The advantage of the Fermat spiral pattern is that the spacing between the microlenses in the microlens array is almost equal, resulting in a larger area ratio; and for different viewing angles, a sufficient number of microlenses and peripheral defocus are always maintained within the field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a schematic structural diagram of a progressive multi-element microlens spectacle lens according to the present invention;

[0036] Figure 2 Schematic diagram of the process of designing a progressive multi-element micro-lens spectacle lens according to the present invention;

[0037] Figure 3 This is a schematic diagram of the Fermat spiral structure of the present invention;

[0038] Figure 4 A top view of the micro-lens distribution structure arranged in a Fermat spiral arrangement according to the present invention;

[0039] Figure 5 This is a schematic diagram of the area ratio of the near-central prescription optical zone of the present invention;

[0040] Figure 6 This is a schematic diagram of the conventional design area ratio of the near-central prescription optical zone of the present invention;

[0041] Figure 7 This is the optical power distribution diagram of the present invention within the range of 9mm to 23mm;

[0042] Figure 8 This is the optical power distribution diagram of the present invention within an aperture range of 22mm to 36mm. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Example 1

[0046] In response to the above-mentioned problems existing in the prior art, this embodiment provides a progressive multi-element microlens spectacle lens, which always ensures a sufficient number of microlenses and peripheral defocus within the field of view for different field angles.

[0047] like Figure 1 As shown, this embodiment provides a progressive multi-element microlens spectacle lens, comprising a single vision lens 1 and a microlens array 2. The single vision lens 1 includes a front surface and a back surface, with the microlens array 2 superimposed on either surface; the multiple microlenses in the microlens array 2 are arranged in a Fermat spiral.

[0048] The advantage of the Fermat spiral arrangement is that the spacing between the multiple microlenses in the microlens array 1 is almost equal, and the area occupies a larger proportion under the same aperture; and for different field angles, the field of view always ensures a sufficient number of microlenses and peripheral defocus.

[0049] In this embodiment, the single-vision lens 1 has a basic optical focal length, is used for refractive correction, and forms an image on the retina; the microlens dot array 2 has an additional optical focal length, which serves to adjust the peripheral defocus amount and the convergence of the edge light, and the microlens dot array 2 forms an image in front of the retina to inhibit the growth of the eye axis.

[0050] Part of the single vision lens 1 is a prescription optical zone, and part of the microlens array 2 is a defocused optical zone. The optical power of the prescription optical zone is determined by the doctor's prescription, and the central diameter of the prescription optical zone is 5 to 15 mm; the outer diameter of the defocused optical zone is 20 to 50 mm, and the add power of the defocused optical zone ranges from 0.5D to 5.5D.

[0051] In this embodiment, the aperture of each microlens gradually changes from small to large in the direction extending from the center of the single-vision lens 1 to the edge of the single-vision lens 1, and the additional optical power of each microlens gradually changes from small to large, which has the effect of enhancing the peripheral defocus amount for close-range eye use.

[0052] Furthermore, the plurality of microlenses in the microlens array 2 are linearly arranged on n divergent angle rays; wherein the i-th divergent angle ray is a ray with a divergent angle α drawn from a pole in a polar coordinate system. i The polar coordinate system is a coordinate system established with the center point of the single vision lens as the pole, a horizontal ray as the polar axis, and a counterclockwise direction as the positive direction of the angle, and its length unit is mm; divergence angle α i The range is 0°~360°, the divergence angle α i and divergence angle α i-1 The difference is a constant value P, the constant value P ranges from 0 to 60°, and the value of n is 360° / P.

[0053] In the polar coordinate system, the relationship between the aperture of the microlens and the position of the center point of the microlens follows a first formula; the first formula is:

[0054] d j =A j *R j *α i ;

[0055] d j represents the aperture size of the jth microlens on the i-th divergent angle ray, 0.3≤d j ≤0.9, R j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, A j is the constant coefficient family of the jth microlens, Aj The range is 0.1 to 2.0.

[0056] In the polar coordinate system, the relationship between the additional optical power of the microlens and the radius of the center point of the microlens follows a second formula; the second formula is:

[0057] add j =B j *R j *α i ;

[0058] Among them, add j represents the additional light angle of the jth microlens on the i-th divergent angle ray, R j is the radius of the center point of the jth microlens, R j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, B j is the constant coefficient family of the jth microlens, B j The range is 0.1 to 2.0.

[0059] In the polar coordinate system, the arrangement of the Fermat spiral follows the third formula, which is:

[0060]

[0061] Where r is the radial distance, a is the angle from the zero-degree line, and K determines the tightness of the Fermat spiral.

[0062] In this embodiment, the mirror surface of each microlens in the microlens array is an aspherical surface.

[0063] The aspherical microlens is determined according to the fourth formula; the fourth formula is:

[0064]

[0065] With the vertex of the microlens mirror surface as the origin O and the central axis of a microlens as the Z axis, a spatial rectangular coordinate system is established; the X axis and Y axis of the spatial rectangular coordinate system are on the tangent plane of the microlens vertex, and the Z axis is the tangent plane of the microlens vertex. j (x) is the value in (R j , α i ) on the two-dimensional coordinate plane XZ, c is the reciprocal of the base spherical radius of curvature of the aspherical microlens, y is the vertical distance from any point on the curve to the X-axis, a1, a2, a3... are higher-order coefficients, and Q is the quadratic coefficient.

[0066] Example 2

[0067] like Figure 2 As shown, this embodiment provides a method for designing a progressive multi-element micro-lens eyeglass lens, comprising:

[0068] Step 100: Determine the parameters of the single vision lens; the parameters of the single vision lens are the front surface curvature and the back surface curvature of the single vision lens, and the optical power of the single vision lens.

[0069] Step 200: Construct a polar coordinate system based on the single vision lens, and determine each divergence angle and the number of divergence angle rays according to the polar coordinate system, specifically:

[0070] A polar coordinate system is established with the center point of the single vision lens as the pole, a horizontal ray as the polar axis, and the counterclockwise direction as the positive direction of the angle. Each divergence angle is determined on the polar coordinate system, and then the number of divergence angle rays is determined according to the difference between the two divergence angles.

[0071] The advantage of the arrangement of the Fermat spiral is that the multiple microlenses in the microlens array are linearly arranged on n divergent angle rays, wherein the i-th divergent angle ray is a divergent angle α drawn from the pole in the polar coordinate system. i The rays diverge at an angle α i The range is 0°~360°, the divergence angle α i and divergence angle α i-1 The difference is a constant value P, the constant value P ranges from 0 to 60°, and the value of n is 360° / P.

[0072] In this embodiment, P is 4.5°, and the value of n is 1620. Figure 3 As shown, the divergent angle ray part of the Fermat spiral structure principle diagram is completed.

[0073] Step 300: Determine a Fermat spiral according to the polar coordinate system, and determine the number of microlenses and the position of the center point of each microlens according to the Fermat spiral; the intersection of the Fermat spiral and the divergent angle ray is the center point of the microlens.

[0074] In the polar coordinate system, the arrangement of the Fermat spiral follows the third formula, which is:

[0075]

[0076] Where r is the radial distance, a is the angle from the zero-degree line, and K determines the tightness of the Fermat spiral.

[0077] In this embodiment, a is set to 1.25 and k is set to 1. Figure 3As shown, the Fermat spiral part in the Fermat spiral structure principle diagram is completed. At this point, the intersection of the Fermat spiral and the divergent angle ray is determined, and the intersection position is the center point of each microlens.

[0078] Part of the single vision lens is the prescription optical zone, and part of the microlens array is the defocused optical zone. The optical power of the prescription optical zone is determined by the doctor's prescription. In this embodiment, the optical power of the prescription optical zone is set to OD, and the central diameter of the prescription optical zone is 9mm; the outer diameter of the defocused optical zone is 36mm. Figure 4 The microlens distribution structure shown in the figure has a total of 760 microlenses and 19 circles.

[0079] Step 400: Determine the additional optical power, aperture and surface parameters of each microlens.

[0080] In the polar coordinate system, the relationship between the additional optical power of the microlens and the radius of the center point of the microlens follows a second formula; the second formula is:

[0081] add j =B j *R j *α i ;

[0082] Among them, add j represents the additional light angle of the jth microlens on the i-th divergent angle ray, R j is the radius of the center point of the jth microlens, R j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, B j is the constant coefficient family of the jth microlens, B j The range is 0.1 to 2.0:

[0083] In the extension direction from the center of the single-vision lens to the edge of the single-vision lens, the additional optical power of the microlens gradually increases, and the distribution of the additional optical power of the defocused optical zone is 4.0D (first 6 circles), 3.5D (7th to 13th circles), and 3.0D (14th to 19th circles).

[0084] In the polar coordinate system, the relationship between the aperture of the microlens and the position of the center point of the microlens follows a first formula; the first formula is:

[0085] d j =A j *R j *α i ;

[0086] d jR represents the aperture size of the jth microlens on the i-th divergent angle ray, j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, A j is the constant coefficient family of the jth microlens, A j The range is 0.1 to 2.0.

[0087] In the extending direction from the center of the single vision lens to the edge of the single vision lens, the radius of the center point of the micro lens gradually increases. 19 The specific distribution is 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, and 0.49mm.

[0088] The mirror surface of the microlens is aspherical. The aspherical microlens is determined according to the fourth formula; the fourth formula is:

[0089]

[0090] With the vertex of the microlens mirror surface as the origin O and the central axis of a microlens as the Z axis, a spatial rectangular coordinate system is established; the X axis and Y axis of the spatial rectangular coordinate system are on the tangent plane of the microlens vertex, and the Z axis is the tangent plane of the microlens vertex. j (x) is the value in (R j , α i ) on the two-dimensional coordinate plane XZ, c is the reciprocal of the base spherical radius of curvature of the aspherical microlens, y is the vertical distance from any point on the curve to the X-axis, a1, a2, a3... are higher-order coefficients, and Q is the quadratic coefficient.

[0091] In ZEMAX software, a human eye model wearing glasses was constructed and the Z j (x)Expression.

[0092] Step 500: Prepare a progressive multi-element microlens spectacle lens according to the parameters of the single vision lens, the number of microlenses, the center point position of each microlens, the additional optical power, the aperture, and the surface shape parameters, specifically:

[0093] According to the parameters of the single vision lens, the number of the microlenses, the center point position of each microlens, the additional optical power, the aperture and the surface parameters, a corresponding mold is prepared, and then molded, and molten plastic particles are injected into the mold and cooled to form.

[0094] In addition, in this embodiment, the method further includes: optical analysis.

[0095] Use a topographer to test the optical power distribution at different apertures and analyze the area ratio of the microlens area. Figure 5 As shown in the figure, the area ratio of the near-central prescription optical zone is about 60% when the sampling circle with a diameter of 2 mm is taken. Figure 6 It can be seen that under the same conditions, the microlens area accounts for about 44%, the equivalent values of peripheral defocus under different field of view angles, and the imaging resolution under different field of view angles. The results of the optical power topography test show that, Figure 7 As shown, the diameter of the microlens is within 9mm to 23mm, the additional focal length of the first 6 circles of the defocused optical zone is 4.0D, and the prescription focal length of the area outside the microlens is 0D, which is consistent with the design value. Figure 7 and Figure 8 The distribution of additional optical power in the 7th to 13th defocus optical zone is 3.5D, and the distribution of additional optical power in the 14th to 19th defocus optical zone is 3.0D, both of which are consistent with the design value.

[0096] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0097] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A progressive multi-element microlens spectacle lens, characterized in that: The invention comprises a single vision lens and a microlens array superimposed on any surface of the single vision lens; wherein the plurality of microlenses in the microlens array are arranged in a Fermat spiral; The plurality of microlenses in the microlens array are linearly arranged on n divergent angle rays; The divergence angle ray of the i-th item is the divergence angle α drawn from the pole in the polar coordinate system. i The polar coordinate system is a coordinate system established with the center point of the single vision lens as the pole, a horizontal ray as the polar axis, and a counterclockwise direction as the positive direction of the angle; the divergence angle α i The range is 0°~360°, the divergence angle α i and divergence angle α i-1 The difference is a constant value P, the constant value P ranges from 0 to 60°, and the value of n is 360° / P; In the polar coordinate system, the relationship between the aperture of the microlens and the position of the center point of the microlens follows a first formula; the first formula is: d j =A j *R j *a i ; d j R represents the aperture size of the jth microlens on the i-th divergent angle ray, j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, A j is the constant coefficient family of the jth microlens, A j The range is 0.1 to 2.

0.

2. The progressive multi-element microlens spectacle lens according to claim 1, characterized in that: Part of the single-vision lens is a prescription optical zone, and part of the microlens dot array is a defocused optical zone; the central diameter of the prescription optical zone is 5 to 15 mm; the outer diameter of the defocused optical zone is 20 to 50 mm, and the additional optical power of the defocused optical zone ranges from 0.5D to 5.5D.

3. The progressive multi-element microlens spectacle lens according to claim 1, characterized in that: In the extending direction from the center of the single vision lens to the edge of the single vision lens, the aperture of each microlens gradually changes from small to large, and the additional optical power of each microlens gradually changes from small to large.

4. The progressive multi-element microlens spectacle lens according to claim 1, characterized in that: In the polar coordinate system, the relationship between the additional optical power of the microlens and the radius of the center point of the microlens follows a second formula; the second formula is: add j =B j *R j *α i ; Among them, add j represents the additional light angle of the jth microlens on the i-th divergent angle ray, R j is the radius of the center point of the jth microlens, R j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, B j is the constant coefficient family of the jth microlens, B j The range is 0.1 to 2.

0.

5. The progressive multi-element microlens spectacle lens according to claim 1, characterized in that: In the polar coordinate system, the arrangement of the Fermat spiral follows the third formula, which is: Where r is the radial distance, a is the angle from the zero-degree line, and K determines the tightness of the Fermat spiral.

6. The progressive multi-element microlens spectacle lens according to claim 1, characterized in that: The mirror surface of the microlens is aspherical.

7. The progressive multi-element microlens spectacle lens according to claim 6, characterized in that: The aspherical microlens is determined according to the fourth formula; the fourth formula is: With the vertex of the microlens mirror surface as the origin O and the central axis of a microlens as the Z axis, a spatial rectangular coordinate system is established; the X axis and Y axis of the spatial rectangular coordinate system are on the tangent plane of the microlens vertex, and the Z axis is the tangent plane of the microlens vertex. j (x) is the value in (R j , α i ) on the two-dimensional coordinate plane XZ, c is the reciprocal of the base spherical radius of curvature of the aspherical microlens, y is the vertical distance from any point on the curve to the X-axis, a1, a2, a3... are higher-order coefficients, and Q is the quadratic coefficient.

8. A method for designing a progressive multi-element microlens spectacle lens, characterized in that: include: Determining parameters of a single vision lens; the parameters of the single vision lens are the curvature of the front surface and the curvature of the back surface of the single vision lens, and the optical power of the single vision lens; Constructing a polar coordinate system based on the single vision lens, and determining each divergence angle and the number of divergence angle rays according to the polar coordinate system; Determine a Fermat spiral according to the polar coordinate system, and determine the number of microlenses and the position of the center point of each microlens according to the Fermat spiral; the intersection of the Fermat spiral and the divergent angle ray is the center point of the microlens; Multiple micro lenses are linearly arranged on n divergent angle rays; The divergence angle ray of the i-th item is the divergence angle α drawn from the pole in the polar coordinate system. i The polar coordinate system is a coordinate system established with the center point of the single vision lens as the pole, a horizontal ray as the polar axis, and a counterclockwise direction as the positive direction of the angle; the divergence angle α i The range is 0°~360°, the divergence angle α i and divergence angle α i-1 The difference is a constant value P, the constant value P ranges from 0 to 60°, and the value of n is 360° / P; In the polar coordinate system, the relationship between the aperture of the microlens and the position of the center point of the microlens follows a first formula; the first formula is: d j =A j *R j *a i ; d j R represents the aperture size of the jth microlens on the i-th divergent angle ray, j is the distance between the center point and the pole of the jth microlens, α i is the i-th divergence angle, A j is the constant coefficient family of the jth microlens, A j The range is 0.1 to 2.0; Determining the additional optical power, aperture and surface parameters of each microlens; A progressive multi-element microlens spectacle lens is prepared according to the parameters of the single vision lens, the number of the microlenses, the center point position of each microlens, the additional optical power, the aperture and the surface parameters.

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