Glasses, lens and processing method therefor

Abstract

Glasses, a lens and a processing method therefor, relating to the technical field of lenses. The lens comprises a fixed-focus zone, a first variable-focus zone and a second variable-focus zone. The shape of the fixed-focus zone is circular, and the variation in focal power within the fixed-focus zone is zero. One of the straight lines coinciding with the circle center of the fixed-focus zone is a reference line, and the first variable-focus zone and the second variable-focus zone are arranged in the direction of the reference line. The first variable-focus zone is located at the side of the fixed-focus zone facing away from the second variable-focus zone in the radial direction of the fixed-focus zone. The position of the intersection point between an isofocal line in the first variable-focus zone and the reference line is a first position, the distance between the first position and the circle center of the fixed-focus zone is a target distance, the position corresponding to the point that is at the target distance from the circle center of the fixed-focus zone and coincides with both the second variable-focus zone and the reference line is a second position, and the absolute value of the difference between the variation in focal power of the isofocal line corresponding to the first position and the variation in focal power of the isofocal line corresponding to the second position is greater than zero. The compatibility between the lens and the biological characteristics of human eyes can be improved.

Description

Glasses, lenses and processing methods thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the following Chinese patent application, Chinese patent application with application number 202410080459.0 and application date January 19, 2024. The entire contents of the above Chinese patent application are hereby incorporated into this application by reference. Technical Field

[0003] The present application relates to the field of lens technology, and in particular to glasses, lenses and processing methods thereof. Background Art

[0004] The lens's varifocal surface is a free-form surface with a stable refractive power at its geometric center, while creating a blurred zoom effect around the central fixed focus area. This zoom effect changes smoothly from the center to the edges. This effect is achieved with a single surface, providing a sharp, blurred vision with no visible stitching, resulting in an aesthetically pleasing appearance.

[0005] Free-form surfaces capable of achieving zoom effects are quite complex optical surfaces, and their research involves knowledge from multiple disciplines, including optics, ergonomics, and mathematics. The related art of free-form surfaces capable of achieving zoom functions and applied to eyeglass lenses differs from the actual behavior of the human eye. Summary of the Invention

[0006] In view of this, the embodiments of the present application hope to provide a pair of glasses, lenses and processing methods thereof, aiming to make the lenses more consistent with the biological characteristics of the human eye.

[0007] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0008] An embodiment of the present application provides a lens, which has a fixed focus area, a first zoom area, and a second zoom area. The fixed focus area is circular in shape, the zoom amount of the fixed focus area is zero, one of the straight lines coinciding with the center of the fixed focus area is a baseline, the first zoom area and the second zoom area are arranged along the direction of the baseline, the first zoom area is located on the side of the fixed focus area radially away from the second zoom area, the position of the intersection of the parfocal line in the first zoom area and the baseline is a first position, the distance between the first position and the center of the fixed focus area is a target distance, the position corresponding to the point whose distance from the center of the fixed focus area is the target distance and which coincides with the second zoom area and the baseline is a second position, and the absolute value of the difference between the zoom amount of the parfocal line corresponding to the first position and the zoom amount of the parfocal line corresponding to the second position is greater than zero.

[0009] In one embodiment, the first zoom zone is located on the side of the fixed focus zone close to the temple, the second zoom zone is located on the side of the fixed focus zone close to the nose, and the zoom amount at the second position is greater than the zoom amount at the first position.

[0010] In one embodiment, the isofocal line in the first zoom zone is a circular arc line, and the isofocal line in the second zoom zone is also a circular arc line.

[0011] In one embodiment, the intersection of the baseline and the first zoom zone away from the fixed focus zone is a first target point, the center of the isofocal line in the first zoom zone coincides with the first target point, the intersection of the baseline and the second zoom zone away from the fixed focus zone is a second target point, and the center of the isofocal line in the second zoom zone coincides with the second target point.

[0012] In one embodiment, the lens has a third zoom zone surrounding the outside of the fixed focus zone, and the third zoom zone is located between the first zoom zone and the second zoom zone along the direction of the reference line. The third zoom zone includes multiple first sub-zones, multiple second sub-zones, and multiple third sub-zones. The first sub-zones are distributed in a rectangular array, and every two adjacent first sub-zones are arranged at intervals. The zoom amount in each first sub-zone is a constant value. Each second sub-zone is adjacent to the corresponding two first sub-zones, and the zoom amount of each second sub-zone is greater than the smaller zoom amount of the zoom amounts of the corresponding two first sub-zones, and the zoom amount of each second sub-zone is less than the larger zoom amount of the zoom amounts of the corresponding two first sub-zones. Each third sub-zone is adjacent to the corresponding four first sub-zones, and the zoom amount of each third sub-zone is greater than the smallest zoom amount of the zoom amounts of the corresponding four first sub-zones, and the zoom amount of each third sub-zone is less than the largest zoom amount of the zoom amounts of the corresponding four first sub-zones.

[0013] In one embodiment, the zoom amount of each second sub-area is a weighted average of the corresponding two first sub-areas.

[0014] In one embodiment, the zoom amount of each of the third sub-areas is a weighted average of the corresponding four first sub-areas.

[0015] In one embodiment, a circle whose center coincides with the center of the fixed focus area and is located in the third zoom area is a parfocal circle, and the zoom amounts of the multiple first sub-areas on the parfocal circle are equal.

[0016] Another aspect of the present invention provides a method for processing a lens, comprising:

[0017] Determining a zoom amount of the lens according to a refractive power distribution diagram of a human fundus, wherein an absolute value of a difference between a zoom amount of an isofocal line corresponding to a first position of the lens and a zoom amount of an isofocal line corresponding to a second position of the lens is greater than zero;

[0018] Obtaining a vector height matrix of the lens according to the zoom amount of the lens;

[0019] The lens of the corresponding shape is processed according to the vector height matrix.

[0020] In one embodiment, the lens has a third zoom zone, and the third zoom zone has a plurality of non-rebound zones with a constant zoom amount;

[0021] The method further comprises determining a zoom amount of a lens according to a refractive power distribution diagram of a human fundus, wherein an absolute value of a difference between a zoom amount of an isofocal line corresponding to a first position of the lens and a zoom amount of an isofocal line corresponding to a second position of the lens is greater than zero.

[0022] Arranging the non-repeating regions in a rectangular array with each region overlapping the other to obtain a double region with two non-repeating regions overlapping each other and a quadruple region with four non-repeating regions overlapping each other;

[0023] interpolating the zoom amount of the double area to a weighted average of the zoom amounts corresponding to the two non-double areas;

[0024] The zoom amount of the quadruple area is interpolated as a weighted average of the zoom amounts corresponding to the four non-rejuvenated areas.

[0025] A third aspect of the present application provides glasses, including:

[0026] The lens according to any one of the preceding embodiments;

[0027] A glasses frame, wherein the lens is embedded in the glasses frame.

[0028] The lens provided in the embodiment of the present application has an absolute value of the difference between the zoom amount of the parfocal line corresponding to the first position and the zoom amount of the parfocal line corresponding to the second position greater than zero, so that the zoom amount of any parfocal line in the first zoom zone is different from the zoom amount of the corresponding parfocal line in the second zoom zone, thereby achieving an asymmetric arrangement of the zoom amounts of the first zoom zone and the second zoom zone, which is beneficial to improving the matching degree of the lens with the biological characteristics of the human eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of various partitions of a lens in one embodiment of the present application;

[0030] FIG2 is a schematic diagram showing the filling of the first sub-area, the second sub-area, and the third sub-area of ​​the third zoom zone of the lens in one embodiment of the present application;

[0031] FIG3 is a schematic diagram of the zoom effect of a lens in one embodiment of the present application;

[0032] FIG4 is a schematic diagram of the effect of lenses on myopia correction in the related art;

[0033] FIG5 is a schematic diagram of nine first sub-areas arranged in a rectangular array in one embodiment of the present application;

[0034] FIG6 is a schematic flow chart of a processing method in one embodiment of the present application.

[0035] Explanation of the reference numerals 1. lens; 1a. parfocal line; 11. fixed focus area; 12. first zoom area; 13. second zoom area; 14. third zoom area; 14a. first sub-area; 14b. second sub-area; 14c. third sub-area; 15. transition area. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" in the embodiments of this application and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0039] In related art, as shown in Figure 4, research and application of free-form surfaces capable of achieving zoom functionality in lenses have all employed symmetrical designs, with the zoom range on the nasal side and the temporal side of the lens designed to be symmetrical. This differs from the fact that the human eye's refractive power is asymmetric between the nasal and temporal sides. According to the human fundus refractive power distribution diagram, the required zoom range on the temporal side is greater than that on the nasal side. Therefore, different zoom effects should be produced on the nasal and temporal sides of the lens.

[0040] In view of this, an embodiment of the present application provides a lens 1, please refer to Figure 1, the lens 1 has a fixed focus area 11, a first zoom area 12 and a second zoom area 13, the fixed focus area 11 is circular in shape, the zoom amount of the fixed focus area 11 is zero, one of the straight lines coinciding with the center of the fixed focus area 11 is a baseline, the first zoom area 12 and the second zoom area 13 are arranged along the direction of the baseline, the first zoom area 12 is located on the side of the fixed focus area 11 away from the second zoom area 13 along the radial direction of the fixed focus area 11, the position of the intersection of the parfocal line 1a in the first zoom area 12 and the baseline is a first position, the distance between the first position and the center of the fixed focus area 11 is a target distance, the position corresponding to the point where the distance between the first position and the center of the fixed focus area 11 is the target distance and the position corresponding to the point coinciding with the second zoom area 13 and the baseline is a second position, and the absolute value of the difference between the zoom amount of the parfocal line 1a corresponding to the first position and the zoom amount of the parfocal line 1a corresponding to the second position is greater than zero.

[0041] It should be noted that the parfocal line 1 a is a line composed of points with equal zoom amounts, and the zoom amount of any point on the parfocal line 1 a is equal.

[0042] Exemplarily, the isofocal line 1 a is an arc curve, and the arc curve composed of points with equal zoom amounts is distributed in the first zoom area 12 and the second zoom area 13 respectively.

[0043] It is understood that the shape of the isofocal line 1a is not limited in the embodiment of the present application. For example, the isofocal line 1a can be a circular arc curve or an elliptical arc curve.

[0044] In the embodiment of the present application, the absolute value of the difference between the zoom amount of the equifocal line 1a corresponding to the first position and the zoom amount of the equifocal line 1a corresponding to the second position is greater than zero, so that the zoom amount of any equifocal line 1a in the first zoom zone 12 is different from the zoom amount of the corresponding equifocal line 1a in the second zoom zone 13, thereby realizing an asymmetric arrangement of the zoom amounts of the first zoom zone 12 and the second zoom zone 13, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye, so that the lens 1 can effectively form a zoom effect that is more in line with the human eye in front of the retina of the human eye.

[0045] In one embodiment, referring to FIG. 1 and FIG. 3 , the first zoom zone 12 is located on the side of the fixed focus zone 11 close to the temple, and the second zoom zone 13 is located on the side of the fixed focus zone 11 close to the nose. The zoom amount at the second position is greater than the zoom amount at the first position.

[0046] It should be noted that the nasal region refers to the side of the human eye closest to the nose, while the temporal region refers to the side of the human eye closest to the temporal bone. Due to the refractive effect of the lens 1, incident light on the temporal region of the human eye originates from the side of the lens 1 closest to the nose, i.e., the second zoom zone 13; incident light on the nasal region of the human eye originates from the side of the lens 1 closest to the temple, i.e., the first zoom zone 12. Furthermore, the amount of zoom required at the temple is greater than that required at the nose. Therefore, the amount of zoom required at the side of the lens 1 closest to the nose is greater than that required at the side of the lens 1 closest to the temple. In other words, the amount of zoom at the second position within the second zoom zone 13 is greater than the amount of zoom at the first position within the first zoom zone 12.

[0047] In the embodiment of the present application, the zoom amount at the second position is greater than the zoom amount at the first position, so that the lens 1 can meet the requirement that the zoom amount required by the temporal part of the human eye is greater than the zoom amount required by the nasal part of the human eye, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye, so that the lens 1 can effectively form a zoom effect that is more in line with the human eye in front of the retina of the human eye.

[0048] For example, please refer to Figure 3. The lens 1 of the embodiment of the present application is placed at a certain distance in front of the human eye. The reflected light of the object passes through the lens 1 in sequence through the cornea, anterior chamber, and lens of the human eyeball, and is finally imaged on the retina, forming a good zoom effect on the nasal and temporal sides of the human eye.

[0049] In one embodiment, referring to FIG. 1 , the isofocal line 1 a in the first zoom region 12 is an arc line, and the isofocal line 1 a in the second zoom region 13 is also an arc line.

[0050] In the embodiment of the present application, the isofocal lines 1a in the first zoom zone 12 and the second zoom zone 13 are both arc lines, and the arc curves composed of points with the same zoom amount are respectively distributed in the first zoom zone 12 and the second zoom zone 13, so that the lens 1 can meet the changing law of the zoom amount required by the human eye, which is conducive to improving the matching degree between the lens 1 and the biological characteristics of the human eye.

[0051] In one embodiment, referring to FIG1 , the intersection of the baseline and the first zoom zone 12 on the side away from the fixed focus zone 11 is a first target point, and the center of the isofocal line 1a in the first zoom zone 12 coincides with the first target point. The intersection of the baseline and the second zoom zone 13 on the side away from the fixed focus zone 11 is a second target point, and the center of the isofocal line 1a in the second zoom zone 13 coincides with the second target point.

[0052] In the embodiment of the present application, the center of any isofocal line 1a in the first zoom zone 12 coincides with the first target point, and the center of any isofocal line 1a in the second zoom zone 13 also coincides with the second target point, so that the zoom amount in the first zoom zone 12 and the zoom amount in the second zoom zone 13 both change with the change of the radius of the isofocal line 1a, thereby enabling the lens 1 to further meet the change law of the zoom amount required by the human eye, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye.

[0053] In one embodiment, the zoom amount of the first zoom zone 12 is expressed as: F1 = DFADDN × sin (π × d1 / (L1 - r));

[0054] Where:

[0055] F1 is the zoom amount of the first zoom zone 12;

[0056] DFADDN is the maximum zoom amount of the first zoom zone 12;

[0057] d1 is the distance between the first position in the first variable focus area 12 and the center of the fixed focus area 11 minus the radius of the fixed focus area 11;

[0058] r is the radius of the fixed focus area 11;

[0059] L1 is the distance from the first reference point on the reference line within the first zoom area 12 to the center of the fixed focus area 11 .

[0060] In the embodiment of the present application, the expression of the zoom amount of the first zoom area 12 is a sin function change curve, which can make the change of the zoom amount of the first zoom area 12 smoother.

[0061] In one embodiment, the zoom amount of the first zoom zone 12 may also be expressed as:

[0062] Where:

[0063] F1 is the zoom amount of the first zoom zone 12;

[0064] DFADDN is the maximum zoom amount of the first zoom zone 12;

[0065] d1 is the distance between the first position in the first variable focus area 12 and the center of the fixed focus area 11 minus the radius of the fixed focus area 11;

[0066] r is the radius of the fixed focus area 11;

[0067] AN is the curve control coefficient of the first zoom zone 12;

[0068] b1 is the translation constant of the first zoom zone 12 curve.

[0069] In the embodiment of the present application, the expression of the zoom amount of the first zoom area 12 is a sigmoid function change curve, which can make the zoom amount of the first zoom area 12 more stable.

[0070] In one embodiment, the zoom amount of the second zoom zone 13 is expressed as: F2=DFADDT×sin(π×d2 / (L2-r));

[0071] Where:

[0072] F2 is the zoom amount of the second zoom zone 13;

[0073] DFADDT is the maximum zoom amount of the second zoom zone 13;

[0074] d2 is the distance between the second position in the second variable focus area 13 and the center of the fixed focus area 11 minus the radius of the fixed focus area 11;

[0075] r is the radius of the fixed focus area 11;

[0076] L2 is the distance from the second reference point on the reference line within the second zoom area 13 to the center of the fixed focus area 11 .

[0077] In the embodiment of the present application, the expression of the zoom amount of the second zoom area 13 is a sin function change curve, which can make the change of the zoom amount of the second zoom area 13 smoother.

[0078] In one embodiment, the zoom amount of the second zoom area 13 may also be expressed as:

[0079] Where:

[0080] F2 is the zoom amount of the second zoom zone 13;

[0081] DFADDT is the maximum zoom amount of the second zoom zone 13;

[0082] d2 is the distance between the second position in the second variable focus area 13 and the center of the fixed focus area 11 minus the radius of the fixed focus area 11;

[0083] r is the radius of the fixed focus area 11;

[0084] AT is the curve control coefficient of the second zoom zone 13;

[0085] b2 is the translation constant of the curve of the second zoom area 13.

[0086] In the embodiment of the present application, the expression of the zoom amount of the second zoom area 13 is a sigmoid function change curve, which can make the zoom amount of the second zoom area 13 more stable.

[0087] In one embodiment, referring to Figures 1, 2, and 5, the lens 1 has a third zoom region 14 surrounding the fixed focus region 11. The third zoom region 14 is located between the first zoom region 12 and the second zoom region 13 along the direction of the reference line. The third zoom region 14 includes a plurality of first sub-regions 14a, a plurality of second sub-regions 14b, and a plurality of third sub-regions 14c. The first sub-regions 14a are distributed in a rectangular array, with each adjacent two first sub-regions 14a arranged at intervals. The zoom amount in each first sub-region 14a is a fixed value. Each second sub-region 14b is respectively aligned with the corresponding two first sub-regions 14a. The sub-areas 14a are adjacent to each other, the zoom amount of each second sub-area 14b is greater than the smaller zoom amount of the corresponding two first sub-areas 14a, the zoom amount of each second sub-area 14b is less than the larger zoom amount of the corresponding two first sub-areas 14a, and each third sub-area 14c is adjacent to the corresponding four first sub-areas 14a, the zoom amount of each third sub-area 14c is greater than the smallest zoom amount of the corresponding four first sub-areas 14a, and the zoom amount of each third sub-area 14c is less than the largest zoom amount of the corresponding four first sub-areas 14a.

[0088] It should be noted that according to the refractive power distribution diagram of the human fundus, a zoom ring will appear in the visual center of the human eye. Therefore, the lens 1 needs a third zoom area 14 surrounding the outside of the fixed focus area 11 to make the zoom amount of the third zoom area 14 match the refractive power distribution of the human fundus.

[0089] In the embodiment of the present application, the third zoom zone 14 surrounds the outside of the fixed focus zone 11, and the third zoom zone 14 is divided into multiple first sub-zones 14a, multiple second sub-zones 14b and multiple third sub-zones 14c. The zoom amount of each second sub-zone 14b is between the zoom amounts of the corresponding two first sub-zones 14a, and the zoom amount of each third sub-zone 14c is between the zoom amounts of the corresponding four first sub-zones 14a, so that the zoom amount in the third zoom zone 14 changes evenly and smoothly, thereby enabling the lens 1 to effectively form a zoom effect that is more in line with the human eye in front of the human retina.

[0090] In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 5 , the zoom amount of each second sub-area 14 b is a weighted average of the corresponding two first sub-areas 14 a .

[0091] Exemplarily, the expression of the zoom amount of the second sub-area 14b is: P(i,j-1)=(θ1P(i,j)+θ2P(i,j-2)); P(i,j+1)=(θ1P(i,j)+θ2P(i,j+2)); P(i-1,j)=(θ1P(i,j)+θ2P(i-2,j)); P(i+1,j)=(θ1P(i,j)+θ2P(i+2,j));

[0092] Where:

[0093] P(i,j-1), P(i,j+1), P(i-1,j), and P(i+1,j) are all zoom amounts of the second sub-area 14b;

[0094] P(i,j), P(i,j-2), P(i,j+2), P(i-2,j), and P(i+2,j) are the zoom amounts of the corresponding first sub-area 14a;

[0095] θ1 and θ2 are weights of the corresponding two first sub-areas 14 a , respectively, satisfying θ1+θ2=1, θ1=θ2.

[0096] In the embodiment of the present application, the zoom amount of each second sub-area 14b is the weighted average of the corresponding two first sub-areas 14a, so that the zoom amount of the second sub-area 14b is less than the larger value of the zoom amount of the corresponding two first sub-areas 14a, and greater than the smaller value of the zoom amount of the corresponding two first sub-areas 14a, thereby making the zoom amount in the third zoom area 14 change evenly and smoothly from the first sub-area 14a to the second sub-area 14b, so that the lens 1 can effectively form a zoom effect that is more in line with the human eye in front of the human retina.

[0097] In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 5 , the zoom amount of each third sub-area 14 c is a weighted average value of the corresponding four first sub-areas 14 a .

[0098] Exemplarily, the expression of the zoom amount of the third sub-area 14c is: P(i-1,j-1)=(θ1P(i,j)+θ2P(i-2,j-2)+θ3P(i-2,j)+θ4P(i,j-2)); P(i-1,j+1)=(θ1P(i,j)+θ2P(i-2,j)+θ3P(i,j+2)+θ4P(i-2,j+2)); P(i+1,j-1)=(θ1P(i,j)+θ2P(i+2,j)+θ3P(i,j-2)+θ4P(i+2,j-2)); P(i+1,j+1)=(θ1P(i,j)+θ2P(i+2,j+2)+θ3P(i,j+2)+θ4P(i,j+2));

[0099] Where:

[0100] P(i-1, j-1), P(i-1, j+1), P(i+1, j-1), and P(i+1, j+1) are all zoom amounts of the third sub-area 14c;

[0101] P(i,j), P(i-2,j-2), P(i-2,j), P(i,j-2), P(i,j+2), P(i-2,j+2), P(i+2,j), P(i+2,j-2), and P(i+2,j+2) are the zoom amounts of the corresponding first sub-area 14a;

[0102] θ1, θ2, θ3, and θ4 are weights of the corresponding four first sub-areas 14 a, respectively, satisfying θ1+θ2+θ3+θ4=1, θ1=θ2=θ3=θ4.

[0103] In the embodiment of the present application, the zoom amount of each third sub-area 14c is the weighted average of the corresponding four first sub-areas 14a, so that the zoom amount of the third sub-area 14c is less than the maximum zoom amount of the corresponding four first sub-areas 14a, and greater than the minimum zoom amount of the corresponding four first sub-areas 14a, thereby making the zoom amount in the third zoom area 14 change evenly and smoothly from the first sub-area 14a to the third sub-area 14c, so that the lens 1 can effectively form a zoom effect that is more in line with the human eye in front of the human retina.

[0104] In one embodiment, referring to FIG. 1 and FIG. 2 , a circle whose center coincides with the center of the fixed focus area 11 and is located in the third zoom area 14 is a parfocal circle, and the zoom amounts of the multiple first sub-areas 14 a on the parfocal circle are equal.

[0105] In the embodiment of the present application, as the radius of the parfocal circle changes, the zoom amount of the first sub-area 14a on the parfocal circle in the third zoom zone 14 can also change evenly and smoothly, so that the lens 1 meets the variation law of the zoom amount required by the human eye, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye, so that the lens 1 can effectively form a zoom effect that is more in line with the human eye in front of the human retina.

[0106] In one embodiment, referring to Figures 1 and 2, the lens 1 further has a transition zone 15, which surrounds the outside of the third zoom zone 14. The first zoom zone 12 and the second zoom zone 13 are both located on the side of the transition zone 15 away from the fixed focus zone 11. The change in the zoom amount of the transition zone 15 along the straight line where the baseline is located is calculated using a convolution smoothing algorithm.

[0107] In the embodiment of the present application, the change in the zoom amount of the transition zone 15 along the straight line direction where the baseline is located is calculated according to the convolution smoothing algorithm, so that the change in the zoom amount of the transition zone 15 of the lens 1 is more uniform and smooth, so that the lens 1 meets the change law of the zoom amount required by the human eye, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye, so that the lens 1 can effectively form a zoom effect that is more in line with the human eye in front of the human retina.

[0108] Another aspect of the present invention provides a method for processing a lens 1, as shown in FIG6 , including:

[0109] Step S1, determining the zoom amount of the lens 1 according to the refractive power distribution diagram of the human fundus, and the absolute value of the difference between the zoom amount of the parfocal line 1a corresponding to the first position of the lens 1 and the zoom amount of the parfocal line 1a corresponding to the second position of the lens 1 is greater than zero.

[0110] Step S2: obtaining the vector height matrix of the lens 1 according to the zoom amount of the lens 1.

[0111] Step S3: processing a lens 1 of a corresponding shape according to the vector height matrix.

[0112] The processing method provided in the embodiments of the present application is applicable to the field of lens 1 technology. The zoom amount of each region of lens 1 is determined based on the diopter distribution diagram of the human fundus, thereby obtaining a vector height matrix of lens 1, i.e., the variation pattern of the zoom amount of each region on lens 1. Lens 1 processed according to this variation pattern has a zoom amount that matches the diopter of the human fundus, effectively creating a zoom effect that is more consistent with the human eye in front of the human retina.

[0113] The detection method of the embodiment of the present application is described in detail below with reference to specific examples.

[0114] Step S1, determining the zoom amount of the lens 1 according to the refractive power distribution diagram of the human fundus, and the absolute value of the difference between the zoom amount of the parfocal line 1a corresponding to the first position of the lens 1 and the zoom amount of the parfocal line 1a corresponding to the second position of the lens 1 is greater than zero.

[0115] It should be noted that, according to the refractive power distribution diagram of the human fundus, the amount of zoom required on the temporal side of the human eye is greater than that required on the nasal side, and a zoom ring will appear around the visual center, which means that the lens 1 should produce different zoom effects in different areas.

[0116] In this step, the required zoom amount for each area of ​​lens 1 is calculated based on the diopter distribution of the human fundus, so that the zoom amount of each area on lens 1 matches the diopter distribution of the human fundus. Furthermore, the absolute value of the difference between the zoom amount of the parfocal line 1a corresponding to the first position of lens 1 and the zoom amount of the parfocal line 1a corresponding to the second position is greater than zero. This ensures that lens 1 matches the characteristic that the zoom amount required by the nasal and temporal sides of the human eye is different, thereby obtaining the correct parameters for the sag matrix used in the processing of lens 1.

[0117] Step S2: obtaining the vector height matrix of the lens 1 according to the zoom amount of the lens 1.

[0118] In this step, the vector height matrix used for processing the lens 1 is calculated based on the zoom amount of each area of ​​the lens 1.

[0119] Step S3: processing a lens 1 of a corresponding shape according to the vector height matrix.

[0120] In this step, the lens 1 is processed according to the vector height matrix to obtain a lens 1 with a free-form surface shape, so that the lens 1 produces different zoom effects in different areas, thereby improving the matching degree between the processed lens 1 and the biological characteristics of the human eye.

[0121] In an embodiment of the present application, the zoom amount required for different areas on the lens 1 is obtained based on the biological characteristics of the human fundus, and then the vector height matrix used for processing the lens 1 is obtained. The lens 1 is processed based on the vector height matrix, so that the processed lens 1 has a higher degree of matching with the biological characteristics of the human eye, which is conducive to the processed lens 1 forming a zoom effect that is more in line with the human eye in front of the human retina.

[0122] In one embodiment, the lens 1 has a third zoom region 14, and the third zoom region 14 has a plurality of non-rebound regions with a constant zoom amount;

[0123] The zoom amount of the lens 1 is determined according to a refractive power distribution diagram of a human fundus, wherein the absolute value of the difference between the zoom amount of the parfocal line 1a corresponding to the first position of the lens 1 and the zoom amount of the parfocal line 1a corresponding to the second position of the lens 1 is greater than zero, and further comprising:

[0124] In step S11 , the non-repeating regions are arranged in a rectangular array and overlapped with each other to obtain a double region with two overlapping non-repeating regions and a quadruple region with four overlapping non-repeating regions.

[0125] Step S12: interpolate the zoom amount of the double area to a weighted average of the zoom amounts of the two corresponding non-double areas.

[0126] Step S13: interpolate the zoom amount of the quadruple area to a weighted average of the zoom amounts of the corresponding four non-quadruple areas.

[0127] In the embodiment of the present application, multiple non-weighted areas are arranged in an overlapping rectangular array, which will produce multiple double areas and multiple quadruple areas. The difference in the zoom amount of the double area is calculated as the weighted average of the zoom amounts of the two non-weighted areas, and the difference in the zoom amount of the quadruple area is calculated as the weighted average of the zoom amounts of the four non-weighted areas, so that the zoom amount in the third zoom area 14 changes evenly and smoothly, and then the third zoom area 14 on the lens 1 can effectively form a zoom effect that is more in line with the human eye at the corresponding position in front of the retina of the human eye.

[0128] For example, referring to FIG. 2 and FIG. 5 , the double region is the second sub-region 14 b , and the quadruple region is the third sub-region 14 c .

[0129] A third aspect of the embodiments of the present application provides glasses, including:

[0130] The lens 1 described in the aforementioned embodiment;

[0131] The lens 1 is embedded in the frame.

[0132] In the embodiment of the present application, when a user wears the glasses provided in the embodiment of the present application, the glasses can provide the user's eyes with a zoom effect that is more in line with the biological characteristics of the human eye, which is conducive to improving the user's comfort.

[0133] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A lens, the lens having a fixed focus area, a first zoom area, and a second zoom area, the fixed focus area being circular in shape, the zoom amount of the fixed focus area being zero, one of the straight lines coinciding with the center of the fixed focus area being used as a reference line, the first zoom area and the second zoom area being arranged along the direction of the reference line, the first zoom area being located on one side of the fixed focus area radially away from the second zoom area along the radius of the fixed focus area, the position of the intersection of the isofocal line in the first zoom area and the reference line being the first position, the distance between the first position and the center of the fixed focus area being the target distance, and the position corresponding to the point that has a distance from the center of the fixed focus area equal to the target distance and coincides with the second zoom area and the reference line respectively being the second position, the absolute value of the difference between the zoom amount of the isofocal line corresponding to the first position and the zoom amount of the isofocal line corresponding to the second position being greater than zero.

2. The lens according to claim 1, wherein The first zoom area is located on the side of the fixed focus area close to the temple, and the second zoom area is located on the side of the fixed focus area close to the nose, and the zoom amount at the second position is greater than the zoom amount at the first position.

3. The lens according to claim 1, wherein, The isofocal lines in the first zoom area are arc lines, and the isofocal lines in the second zoom area are also arc lines.

4. The lens according to claim 3, wherein, The intersection of the reference line and the side of the first zoom area away from the fixed focus area is the first target point, the center of the isofocal line in the first zoom area coincides with the first target point, the intersection of the reference line and the side of the second zoom area away from the fixed focus area is the second target point, and the center of the isofocal line in the second zoom area coincides with the second target point.

5. The lens according to any one of claims 1 to 4, wherein, The lens has a third zoom area surrounding the outside of the fixed focus area, the third zoom area being located between the first zoom area and the second zoom area along the direction of the reference line, the third zoom area including a plurality of first sub - areas, a plurality of second sub - areas, and a plurality of third sub - areas, the first sub - areas being distributed in a rectangular array, with each adjacent two first sub - areas arranged at intervals, the zoom amount in each first sub - area being a fixed value, each second sub - area being adjacent to two corresponding first sub - areas respectively, the zoom amount of each second sub - area being greater than the smaller zoom amount of the two corresponding first sub - areas and less than the larger zoom amount of the two corresponding first sub - areas, each third sub - area being adjacent to four corresponding first sub - areas respectively, the zoom amount of each third sub - area being greater than the smallest zoom amount of the four corresponding first sub - areas and less than the largest zoom amount of the four corresponding first sub - areas.

6. The lens according to claim 5, wherein, The zoom amount of each second sub - area is the weighted average of the two corresponding first sub - areas.

7. The lens according to claim 5, wherein The zoom amount of each third sub - area is the weighted average of the four corresponding first sub - areas.

8. The lens according to claim 5, wherein, The circle with the center coinciding with the center of the fixed focus area and located in the third zoom area is the isofocal circle, and the zoom amounts of the plurality of first sub - areas on the isofocal circle are equal.

9. A method for processing a lens, comprising: Determine the zoom amount of the lens according to the diopter distribution map of the human fundus, and the absolute value of the difference between the zoom amounts of the isofocal lines corresponding to the first position of the lens and the zoom amounts of the isofocal lines corresponding to the second position of the lens is greater than zero; Obtain the sagittal height matrix of the lens according to the zoom amount of the lens; Process the lens with the corresponding shape according to the sagittal height matrix.

10. The processing method according to claim 9, wherein, The lens has a third zoom zone, and there are multiple non-overlapping zones with constant zoom amounts in the third zoom zone; Determine the zoom amount of the lens according to the diopter distribution map of the human fundus, and the absolute value of the difference between the zoom amounts of the isofocal lines corresponding to the first position of the lens and the zoom amounts of the isofocal lines corresponding to the second position of the lens is greater than zero, further comprising: Arrange the non-overlapping zones in a rectangular array to overlap each other, and obtain a double zone where two non-overlapping zones overlap and a quadruple zone where four non-overlapping zones overlap; Interpolate the zoom amount of the double zone into the weighted average of the zoom amounts corresponding to the two non-overlapping zones; Interpolate the zoom amount of the quadruple zone into the weighted average of the zoom amounts corresponding to the four non-overlapping zones.

11. A pair of glasses, comprising: The lens according to any one of claims 1 to 8; A frame, and the lens is embedded in the frame.

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