Glasses, lenses and processing method thereof
By designing an asymmetric zoom area and a uniform and smooth zoom amount distribution on the lens, and processing the lens with the diopter distribution map of the human eye, the problem of mismatch between the biological characteristics of the lens and the human eye is solved, and better zoom effect and wear comfort are achieved.
Patent Information
- Application Number
- CN202410080459.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2025-07-22
AI Technical Summary
The zoom design of existing lenses does not match the biological characteristics of the human eye, especially the zoom quantity design on the nose and temporal side, which cannot meet the asymmetric diopter requirements of the human eye.
The designed lens has a fixed focus area, a first zoom area and a second zoom area. The first zoom area is located on the side of the fixed focus area near the temporal part, and the second zoom area is located on the side of the fixed focus area near the nose. The zoom quantity is designed to be asymmetrically distributed, and the uniform and smooth change of the zoom quantity is achieved through the arc distribution of the isofocal line and multiple sub-regions of the third zoom area. The vector height matrix of the lens is processed in combination with the human eye diopter distribution diagram.
It improves the degree of matching between the lens and the human eye's biological characteristics, achieves a zoom effect that is more in line with the human eye's retina, and improves wearing comfort.
Smart Images
Figure CN120353047A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of lens technology, and in particular to glasses, lenses and processing methods thereof. Background Art
[0002] The zoom surface of the lens is a free-form surface with a stable refractive power at the geometric center, and a blurred zoom effect around the central fixed focus area, and the zoom effect can change smoothly from the center to the edge. Therefore, this effect can be achieved with only one surface, providing a clear center and blurred vision around, without any splicing marks in the surface, and with a beautiful appearance.
[0003] The free-form surface that can achieve zoom effect is a very complex optical surface, and its research involves knowledge of multiple disciplines such as optics, ergonomics and mathematics. In the related art, the free-form surface that can achieve zoom function and is applied to eyeglass lenses is different from the actual situation of the human eye. Summary of the invention
[0004] 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.
[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:
[0006] 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 where the baseline is located, the first zoom area is located on the side of the fixed focus area away from the second zoom area along the radial direction of the fixed focus area, the position of the intersection of the isofocal 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 respectively 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 isofocal line corresponding to the first position and the zoom amount of the isofocal line corresponding to the second position is greater than zero.
[0007] In one embodiment, the first zoom area is located on a side of the fixed focus area close to the temple, the second zoom area is located on a 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.
[0008] In one embodiment, the isofocal line in the first zoom zone is an arc line, and the isofocal line in the second zoom zone is also an arc line.
[0009] 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.
[0010] In one embodiment, the lens has a third zoom zone surrounding the outside of the fixed focus zone, 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 a plurality of first sub-zones, a plurality of second sub-zones and a plurality of 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, 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, 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.
[0011] In one embodiment, the zoom amount of each of the second sub-areas is a weighted average of the corresponding two first sub-areas.
[0012] In one embodiment, the zoom amount of each of the third sub-areas is a weighted average of the corresponding four first sub-areas.
[0013] In one embodiment, a circle whose center coincides with the center of the fixed focus area and is located in the third zoom range is an isofocal circle, and the zoom amounts of the plurality of first sub-areas on the isofocal circle are equal.
[0014] Another aspect of the present application provides a method for processing a lens, comprising:
[0015] Determine the zoom amount of the lens according to the refractive power distribution diagram of the human fundus, wherein the absolute value of the difference between the zoom amount of the parfocal line corresponding to the first position of the lens and the zoom amount of the parfocal line corresponding to the second position of the lens is greater than zero;
[0016] Obtaining a vector height matrix of the lens according to the zoom amount of the lens;
[0017] The lens of a corresponding shape is processed according to the vector height matrix.
[0018] In one embodiment, the lens has a third zoom region, and there are multiple non-overlapping regions with constant zoom amounts in the third zoom region;
[0019] The zoom amount of the lens is determined according to the diopter distribution map of the human fundus. The absolute value of the difference between the zoom amount of the isofocal line corresponding to the first position of the lens and the zoom amount of the isofocal line corresponding to the second position of the lens is greater than zero. It further includes:
[0020] The non-overlapping regions are arranged in a rectangular array and overlapped with each other to obtain a double region where two non-overlapping regions overlap and a quadruple region where four non-overlapping regions overlap;
[0021] Interpolate the zoom amount of the double region to the weighted average of the zoom amounts of the corresponding two non-overlapping regions;
[0022] Interpolate the zoom amount of the quadruple region to the weighted average of the zoom amounts of the corresponding four non-overlapping regions.
[0023] A third aspect of the embodiments of the present application provides a pair of glasses, including:
[0024] The lens according to any one of the foregoing embodiments;
[0025] A frame, and the lens is embedded in the frame.
[0026] For the lens provided by the embodiments of the present application, since 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 is greater than zero, the zoom amount of any isofocal line in the first zoom region is different from the zoom amount of the corresponding isofocal line in the second zoom region, thereby realizing the asymmetric arrangement of the zoom amounts in the first zoom region and the second zoom region, which is beneficial to improving the matching degree between the lens and the biological characteristics of the human eye. Description of the Drawings
[0027] Figure 1 It is a schematic diagram of each partition of the lens in an embodiment of the present application;
[0028] Figure 2 It is a filling schematic diagram of the first sub-region, the second sub-region, and the third sub-region of the third zoom region of the lens in an embodiment of the present application;
[0029] Figure 3 It is a schematic diagram of the zoom effect of the lens in an embodiment of the present application;
[0030] Figure 4 It is a schematic diagram of the myopia correction effect of the lens in the related art;
[0031] Figure 5 It is a schematic diagram of the arrangement of nine first sub-regions in a rectangular array in an embodiment of the present application;
[0032] Figure 6Schematic flowchart of the processing method in an embodiment of the present application.
[0033] Explanation of reference numerals
[0034] 1. Lens; 1a. Isofocal 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 implementation manners
[0035] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the embodiments of this application are intended to cover non-exclusive inclusion.
[0037] In the description of the embodiments of the present application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two unless otherwise specifically defined.
[0038] In the related art, please refer to Figure 4 , the research and use of free-form surfaces that can achieve the zoom function and are applied to lenses are all symmetric designs. The zoom amount on the nasal side of the lens is designed to be symmetrically arranged with the zoom amount on the temporal side of the lens, which is different from the actual situation that the diopter of the human eye is asymmetric on the nasal side and the temporal side. According to the fundus diopter distribution map of the human eye, the required zoom amount on the temporal side of the human eye is greater than that on the nasal side. Therefore, different zoom effects should be produced on the nasal side and the temporal side of the lens.
[0039] 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 shape of the fixed-focus area 11 is circular, and the zoom amount of the fixed-focus area 11 is zero. One of the straight lines that coincides with the center of the fixed-focus area 11 is the reference line. The first zoom area 12 and the second zoom area 13 are arranged along the direction of the reference line. The first zoom area 12 is located on the side of the fixed-focus area 11 radially away from the second zoom area 13. The position of the intersection of the isofocal line 1a in the first zoom area 12 and the reference line is the first position. The distance between the first position and the center of the fixed-focus area 11 is the target distance. The positions corresponding to the points that are at the target distance from the center of the fixed-focus area 11 and coincide with the second zoom area 13 and the reference line respectively are the second positions. The absolute value of the difference between the zoom amount of the isofocal line 1a corresponding to the first position and the zoom amount of the isofocal line 1a corresponding to the second position is greater than zero.
[0040] It should be noted that the isofocal line 1a is a line composed of points with equal zoom amounts, and the zoom amount of any point on the isofocal line 1a is equal.
[0041] Exemplarily, the isofocal line 1a is an arc curve, and the arc curves composed of points with equal zoom amounts are respectively distributed in the first zoom area 12 and the second zoom area 13.
[0042] It can be understood that the shape of the isofocal line 1a is not limited in the embodiments of the present application. Exemplarily, the isofocal line 1a can be an arc curve or an elliptical arc curve.
[0043] In the embodiments of the present application, the absolute value of the difference between the zoom amount of the isofocal line 1a corresponding to the first position and the zoom amount of the isofocal line 1a corresponding to the second position is greater than zero, so that the zoom amount of any isofocal line 1a in the first zoom area 12 is different from the zoom amount of the corresponding isofocal line 1a in the second zoom area 13, thereby realizing the asymmetric arrangement of the zoom amounts of the first zoom area 12 and the second zoom area 13, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye, and enabling the lens 1 to effectively form a zoom effect that is more in line with the human eye in front of the human eye retina.
[0044] In one embodiment, please refer to Figure 1 and Figure 3 , the first zoom area 12 is located on the side of the fixed-focus area 11 close to the temple, the second zoom area 13 is located on the side of the fixed-focus area 11 close to the nose, and the zoom amount at the second position is greater than the zoom amount at the first position.
[0045] It should be noted that the nasal side is the side of the human eye close to the nose, and the temporal side is the side of the human eye close to the temporal bone. Due to the refraction of the lens 1, the incident light on the temporal side of the human eye comes from the side of the lens 1 close to the nasal side, that is, the second zoom area 13; the incident light on the nasal side of the human eye comes from the side of the lens 1 close to the temporal side, that is, the first zoom area 12. Further, the required zoom amount on the temporal side of the human eye is greater than the required zoom amount on the nasal side of the human eye. Therefore, the required zoom amount on the side of the lens 1 close to the nasal side is greater than the required zoom amount on the side of the lens 1 close to the temporal side, that is, the zoom amount at the second position in the second zoom area 13 is greater than the zoom amount at the first position in the first zoom area 12.
[0046] 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 required zoom amount on the temporal side of the human eye is greater than the required zoom amount on the nasal side of the human eye, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye, and enables the lens 1 to effectively form a zoom effect more in line with the human eye in front of the human eye retina.
[0047] Exemplarily, 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 and then passes through the cornea, anterior chamber, and lens of the human eye in sequence, and finally forms an image on the retina, and a good zoom effect is formed on the nasal side and the temporal side of the human eye.
[0048] In one embodiment, please refer to Figure 1 , the isofocal line 1a in the first zoom area 12 is an arc line, and the isofocal line 1a in the second zoom area 13 is also an arc line.
[0049] In the embodiment of the present application, the isofocal lines 1a in the first zoom area 12 and the second zoom area 13 are both arc lines. The arc curves composed of points with the same zoom amount are respectively distributed in the first zoom area 12 and the second zoom area 13, so that the lens 1 can meet the variation law of the required zoom amount of the human eye, which is beneficial to improving the matching degree between the lens 1 and the biological characteristics of the human eye.
[0050] In one embodiment, please refer to Figure 1 , the intersection point of the reference line and the side of the first zoom area 12 away from the fixed focus area 11 is the first target point, the center of the isofocal line 1a in the first zoom area 12 coincides with the first target point, the intersection point of the reference line and the side of the second zoom area 13 away from the fixed focus area 11 is the second target point, and the center of the isofocal line 1a in the second zoom area 13 coincides with the second target point.
[0051] In the embodiment of the present application, the center of any isofocal line 1a in the first zoom region 12 coincides with the first target point, and the center of any isofocal line 1a in the second zoom region 13 also coincides with the second target point. This makes the zoom amount in the first zoom region 12 and the zoom amount in the second zoom region 13 change with the change of the radius of the isofocal line 1a, and then enables the lens 1 to further meet 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.
[0052] In one embodiment, the expression of the zoom amount in the first zoom region 12 is:
[0053] F1 = DFADDN × sin(π × d1 / (L1 - r));
[0054] In the formula:
[0055] F1 is the zoom amount in the first zoom region 12;
[0056] DFADDN is the maximum zoom amount in the first zoom region 12;
[0057] d1 is the distance between the first position in the first zoom region 12 and the center of the fixed-focus region 11 minus the radius of the fixed-focus region 11;
[0058] r is the radius of the fixed-focus region 11;
[0059] L1 is the distance from the first reference point on the reference line in the first zoom region 12 to the center of the fixed-focus region 11.
[0060] In the embodiment of the present application, the expression of the zoom amount in the first zoom region 12 is a sine function change curve, which can make the change of the zoom amount in the first zoom region 12 smoother.
[0061] In one embodiment, the expression of the zoom amount in the first zoom region 12 can also be:
[0062]
[0063] In the formula:
[0064] F1 is the zoom amount in the first zoom region 12;
[0065] DFADDN is the maximum zoom amount in the first zoom region 12;
[0066] d1 is the distance between the first position in the first zoom region 12 and the center of the fixed-focus region 11 minus the radius of the fixed-focus region 11;
[0067] r is the radius of the fixed-focus region 11;
[0068] AN is the curve control coefficient of the first zoom region 12;
[0069] b1 is the translation constant of the first zoom area 12 curve.
[0070] In the embodiment of the present application, the expression of the zoom amount in the first zoom area 12 is a sigmoid function change curve, which can make the stability of the zoom amount in the first zoom area 12 better.
[0071] In one embodiment, the expression of the zoom amount in the second zoom area 13 is:
[0072] F2 = DFADDT × sin(π × d2 / (L2 - r));
[0073] In the formula:
[0074] F2 is the zoom amount in the second zoom area 13;
[0075] DFADDT is the maximum zoom amount in the second zoom area 13;
[0076] d2 is the distance between the second position in the second zoom area 13 and the center of the fixed focus area 11 minus the radius of the fixed focus area 11;
[0077] r is the radius of the fixed focus area 11;
[0078] L2 is the distance from the second reference point on the reference line in the second zoom area 13 to the center of the fixed focus area 11.
[0079] In the embodiment of the present application, the expression of the zoom amount in the second zoom area 13 is a sin function change curve, which can make the change of the zoom amount in the second zoom area 13 smoother.
[0080] In one embodiment, the expression of the zoom amount in the second zoom area 13 can also be:
[0081]
[0082] In the formula:
[0083] F2 is the zoom amount in the second zoom area 13;
[0084] DFADDT is the maximum zoom amount in the second zoom area 13;
[0085] d2 is the distance between the second position in the second zoom area 13 and the center of the fixed focus area 11 minus the radius of the fixed focus area 11;
[0086] r is the radius of the fixed focus area 11;
[0087] AT is the curve control coefficient of the second zoom area 13;
[0088] b2 is the translation constant of the second zoom area 13 curve.
[0089] 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 stability of the zoom amount of the second zoom area 13 better.
[0090] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 5 , the lens 1 has a third zoom area 14 surrounding the outside of the fixed focus area 11. The third zoom area 14 is located between the first zoom area 12 and the second zoom area 13 along the direction of the reference line. The third zoom area 14 includes a plurality of first sub-areas 14a, a plurality of second sub-areas 14b, and a plurality of third sub-areas 14c. The first sub-areas 14a are distributed in a rectangular array, and every two adjacent first sub-areas 14a are arranged at intervals. The zoom amount within each first sub-area 14a is a fixed value. Each second sub-area 14b is adjacent to two corresponding first sub-areas 14a respectively. The zoom amount of each second sub-area 14b is greater than the smaller zoom amount of the two corresponding first sub-areas 14a, and the zoom amount of each second sub-area 14b is less than the larger zoom amount of the two corresponding first sub-areas 14a. Each third sub-area 14c is adjacent to four corresponding first sub-areas 14a respectively. The zoom amount of each third sub-area 14c is greater than the smallest zoom amount of the four corresponding first sub-areas 14a, and the zoom amount of each third sub-area 14c is less than the largest zoom amount of the four corresponding first sub-areas 14a.
[0091] It should be noted that according to the refractive power distribution map of the human eye fundus, there is a zoom ring 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 eye fundus.
[0092] In the embodiment of the present application, the third zoom area 14 surrounds the outside of the fixed focus area 11. The third zoom area 14 is divided into a plurality of first sub-areas 14a, a plurality of second sub-areas 14b, and a plurality of third sub-areas 14c. The size of the zoom amount of each second sub-area 14b is between the sizes of the zoom amounts of the two corresponding first sub-areas 14a, and the size of the zoom amount of each third sub-area 14c is between the sizes of the zoom amounts of the four corresponding first sub-areas 14a, so that the zoom amount within the third zoom area 14 changes uniformly and smoothly, and then the lens 1 can effectively form a zoom effect more in line with the human eye in front of the human eye retina.
[0093] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 5 , the zoom amount of each second sub-area 14b is the weighted average of the two corresponding first sub-areas 14a.
[0094] Exemplarily, the expression of the zoom amount of the second sub-area 14b is:
[0095] P(i, j - 1) = (θ1P(i, j) + θ2P(i, j - 2));
[0096] P(i, j + 1) = (θ1P(i, j) + θ2P(i, j + 2));
[0097] P(i - 1, j) = (θ1P(i, j) + θ2P(i - 2, j));
[0098] P(i + 1, j) = (θ1P(i, j) + θ2P(i + 2, j));
[0099] Where:
[0100] P(i, j - 1), P(i, j + 1), P(i - 1, j), and P(i + 1, j) are all the zoom amounts of the second sub - region 14b;
[0101] 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 - regions 14a respectively;
[0102] θ1 and θ2 are the weights of the corresponding two first sub - regions 14a, satisfying θ1 + θ2 = 1 and θ1 = θ2.
[0103] In the embodiments of the present application, the zoom amount of each second sub - region 14b is the weighted average of the corresponding two first sub - regions 14a, so that the zoom amount of the second sub - region 14b is less than the larger value of the zoom amounts of the corresponding two first sub - regions 14a and greater than the smaller value of the zoom amounts of the corresponding two first sub - regions 14a. Subsequently, the zoom amount within the third zoom region 14 changes uniformly and smoothly from the first sub - region 14a to the second sub - region 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 eye retina.
[0104] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 5 , the zoom amount of each third sub - region 14c is the weighted average of the corresponding four first sub - regions 14a.
[0105] Exemplarily, the expression of the zoom amount of the third sub - region 14c is:
[0106] P(i - 1, j - 1) = (θ1P(i, j) + θ2P(i - 2, j - 2) + θ3P(i - 2, j) + θ4P(i, j - 2));
[0107] P(i - 1, j + 1) = (θ1P(i, j) + θ2P(i - 2, j) + θ3P(i, j + 2) + θ4P(i - 2, j + 2));
[0108] P(i + 1, j - 1) = (θ1P(i, j) + θ2P(i + 2, j) + θ3P(i, j - 2) + θ4P(i + 2, j - 2));
[0109] P(i + 1, j + 1) = (θ1P(i, j) + θ2P(i + 2, j + 2) + θ3P(i + 2, j) + θ4P(i, j + 2));
[0110] Where:
[0111] The zoom amounts of P(i - 1, j - 1), P(i - 1, j + 1), P(i + 1, j - 1), and P(i + 1, j + 1) are all the zoom amounts of the third sub - region 14c;
[0112] The zoom amounts of 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 respectively the zoom amounts of the corresponding first sub - regions 14a;
[0113] θ1, θ2, θ3, and θ4 are respectively the weights of the corresponding four first sub - regions 14a, satisfying θ1 + θ2 + θ3 + θ4 = 1, and θ1 = θ2 = θ3 = θ4.
[0114] In the embodiments of the present application, the zoom amount of each third sub - region 14c is the weighted average of the corresponding four first sub - regions 14a, so that the zoom amount of the third sub - region 14c is less than the maximum value of the zoom amounts of the corresponding four first sub - regions 14a and greater than the minimum value of the zoom amounts of the corresponding four first sub - regions 14a. Subsequently, the zoom amount within the third zoom region 14 changes uniformly and smoothly from the first sub - region 14a to the third sub - region 14c, so that the lens 1 can effectively form a zoom effect more in line with the human eye in front of the human eye retina.
[0115] In one embodiment, please refer to Figure 1 and Figure 2 , the circle with the center coinciding with the center of the fixed - focus region 11 and located in the third zoom region 14 is an isofocal circle, and the zoom amounts of multiple first sub - regions 14a on the isofocal circle are equal.
[0116] In the embodiments of the present application, as the radius of the isofocal circle changes, the zoom amount of the first sub-region 14a on the isofocal circle in the third zoom region 14 can also change uniformly and smoothly accordingly, so that the lens 1 satisfies 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, and enables the lens 1 to effectively form a zoom effect more in line with the human eye in front of the retina of the human eye.
[0117] In one embodiment, please refer to Figure 1 and Figure 2 , the lens 1 further has a transition region 15, the transition region 15 surrounds the outside of the third zoom region 14, the first zoom region 12 and the second zoom region 13 are both located on the side of the transition region 15 away from the fixed focus region 11, and the change of the zoom amount of the transition region 15 along the straight line direction of the reference line is calculated according to the convolution smoothing algorithm.
[0118] In the embodiments of the present application, the change of the zoom amount of the transition region 15 along the straight line direction of the reference line is calculated according to the convolution smoothing algorithm, so that the change of the zoom amount of the transition region 15 of the lens 1 is more uniform and smooth, so that the lens 1 satisfies 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, and enables the lens 1 to effectively form a zoom effect more in line with the human eye in front of the retina of the human eye.
[0119] On the other hand, the embodiments of the present application provide a processing method for the lens 1. Please refer to Figure 6 , including:
[0120] Step S1, determining the zoom amount of the lens 1 according to the diopter distribution map of the human fundus, and the absolute value of the difference between the zoom amount of the isofocal line 1a corresponding to the first position of the lens 1 and the zoom amount of the isofocal line 1a corresponding to the second position of the lens 1 is greater than zero.
[0121] Step S2, obtaining the sag matrix of the lens 1 according to the zoom amount of the lens 1.
[0122] Step S3, processing the lens 1 with a corresponding shape according to the sag matrix.
[0123] The processing method provided by the embodiments of the present application is applicable to the technical field of the lens 1. Determining the zoom amount of each region of the lens 1 according to the diopter distribution map of the human fundus to obtain the sag matrix of the lens 1, that is, the variation law of the zoom amount of each region on the lens 1. The lens 1 processed according to this variation law has a zoom amount matching the diopter of the human fundus and can effectively form a zoom effect more in line with the human eye in front of the retina of the human eye.
[0124] The detection method of the embodiments of the present application will be described in detail below in conjunction with specific embodiments.
[0125] Step S1: Determine the zoom amount of lens 1 according to the diopter distribution map of the human fundus. The absolute value of the difference between the zoom amount of the isofocal line 1a corresponding to the first position of lens 1 and the zoom amount of the isofocal line 1a corresponding to the second position of lens 1 is greater than zero.
[0126] It should be noted that according to the diopter distribution map of the human fundus, the zoom amount required by the temporal side of the human eye is greater than that required by the nasal side, and a zoom ring will appear around the visual center, which makes lens 1 produce different zoom effects in different regions.
[0127] In this step, according to the diopter distribution map of the human fundus, calculate the zoom amount required for each region of lens 1 so that the zoom amount of each region on lens 1 matches the diopter distribution of the human fundus. Further, the absolute value of the difference between the zoom amount of the isofocal line 1a corresponding to the first position of lens 1 and the zoom amount of the isofocal line 1a corresponding to the second position of lens 1 is greater than zero, which matches the characteristic that the zoom amounts required by the nasal side and the temporal side of the human eye are different, and obtains the correct parameters for the sagittal height matrix used for the processing of lens 1.
[0128] Step S2: Obtain the sagittal height matrix of lens 1 according to the zoom amount of lens 1.
[0129] In this step, calculate the sagittal height matrix used for the processing of lens 1 according to the zoom amount of each region of lens 1.
[0130] Step S3: Process lens 1 into the corresponding shape according to the sagittal height matrix.
[0131] In this step, process lens 1 according to the sagittal height matrix, and a lens 1 with a free-form surface shape can be obtained, so that lens 1 produces different zoom effects in different regions, thereby improving the matching degree between the processed lens 1 and the biological characteristics of the human eye.
[0132] In the embodiment of the present application, according to the biological characteristics of the human fundus, obtain the zoom amount required for different regions on lens 1, then obtain the sagittal height matrix used for the processing of lens 1, and process lens 1 according to the sagittal height matrix, so that the matching degree between the processed lens 1 and the biological characteristics of the human eye is relatively high, which is beneficial to forming a more human-eye-compliant zoom effect in front of the human eye retina for the processed lens 1.
[0133] In one embodiment, lens 1 has a third zoom region 14, and there are multiple non-overlapping regions with constant zoom amounts in the third zoom region 14;
[0134] Determine the zoom amount of lens 1 according to the diopter distribution map of the human fundus. The absolute value of the difference between the zoom amount of the isofocal line 1a corresponding to the first position of lens 1 and the zoom amount of the isofocal line 1a corresponding to the second position of lens 1 is greater than zero, and it further includes:
[0135] Step S11: Arrange the non-overlapping regions in a rectangular array to overlap with each other, obtaining a double-overlapping region where two non-overlapping regions overlap and a quadruple-overlapping region where four non-overlapping regions overlap.
[0136] Step S12: Interpolate the zoom amount of the double-overlapping region to be the weighted average of the zoom amounts of the corresponding two non-overlapping regions.
[0137] Step S13: Interpolate the zoom amount of the quadruple-overlapping region to be the weighted average of the zoom amounts of the corresponding four non-overlapping regions.
[0138] In the embodiments of the present application, when multiple non-overlapping regions are arranged to overlap in a rectangular array, multiple double-overlapping regions and multiple quadruple-overlapping regions will be generated. Interpolating the zoom amount of the double-overlapping region to be the weighted average of the zoom amounts of the corresponding two non-overlapping regions and interpolating the zoom amount of the quadruple-overlapping region to be the weighted average of the zoom amounts of the corresponding four non-overlapping regions makes the zoom amount in the third zoom region 14 change uniformly and smoothly, and then enables the third zoom region 14 on the lens 1 to effectively form a zoom effect more in line with the human eye at the corresponding position in front of the human eye retina.
[0139] Exemplarily, please refer to Figure 2 and Figure 5 , the double-overlapping region is the second sub-region 14b, and the quadruple-overlapping region is the third sub-region 14c.
[0140] The third aspect of the embodiments of the present application provides a pair of glasses, including:
[0141] The lens 1 described in the foregoing embodiments;
[0142] A frame, with the lens 1 embedded in the frame.
[0143] In the embodiments of the present application, when the user wears the glasses provided in the embodiments of the present application, the glasses can provide a zoom effect more in line with the biological characteristics of the human eye for the user's eyes, which is beneficial to improving the comfort of the user.
[0144] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A lens, characterized in that, The lens has a fixed-focus area, a first zoom area, and a second zoom area. The shape of the fixed-focus area is circular, and the zoom amount of the fixed-focus area is zero. One of the straight lines that coincides with the center of the fixed-focus area is used as a reference line. The first zoom area and the second zoom area are arranged along the direction of the reference line. The first zoom area is located on the side of the fixed-focus area that radially deviates from the second zoom area away from the center of the fixed-focus area. The position of the intersection of the isofocal line in the first zoom area and the reference line is the first position. The distance between the first position and the center of the fixed-focus area is the target distance. 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 is 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 is 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. 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 line in the first zoom area is an arc line, and the isofocal line in the second zoom area is also an arc line.
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. 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, characterized in that, The lens has a third zoom area surrounding the outside of the fixed-focus area. The third zoom area is located between the first zoom area and the second zoom area along the direction of the reference line. The third zoom area includes a plurality of first sub-areas, a plurality of second sub-areas, and a plurality of third sub-areas. The first sub-areas are distributed in a rectangular array, and every two adjacent first sub-areas are arranged at intervals. The zoom amount in each first sub-area is a fixed value. Each second sub-area is adjacent to two corresponding first sub-areas respectively. The zoom amount of each second sub-area is 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 is adjacent to four corresponding first sub-areas respectively. The zoom amount of each third sub-area is 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, characterized in that, The circle with the center coinciding with the center of the fixed-focus area and located in the third zoom area is an isofocal circle, and the zoom amounts of the plurality of first sub-areas on the isofocal circle are equal.
9. A processing method for a lens, characterized in that, Including: 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 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, characterized in that, The lens has a third zoom region, and there are multiple non-overlapping regions with constant zoom amounts in the third zoom region; 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 isofocal lines corresponding to the second position of the lens is greater than zero, and further includes: Arrange the non-overlapping regions in a rectangular array to overlap each other to obtain a double region where two non-overlapping regions overlap and a quadruple region where four non-overlapping regions overlap; Interpolate the zoom amount of the double region to the weighted average of the zoom amounts of the corresponding two non-overlapping regions; Interpolate the zoom amount of the quadruple region to the weighted average of the zoom amounts of the corresponding four non-overlapping regions.
11. A pair of glasses, characterized in that, Include: The lens according to any one of claims 1 to 8; A frame, and the lens is embedded in the frame.