CN115167002A - Design and processing method of customized out-of-focus lens - Google Patents
Design and processing method of customized out-of-focus lens Download PDFInfo
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- CN115167002A CN115167002A CN202210981869.3A CN202210981869A CN115167002A CN 115167002 A CN115167002 A CN 115167002A CN 202210981869 A CN202210981869 A CN 202210981869A CN 115167002 A CN115167002 A CN 115167002A
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- 238000013461 design Methods 0.000 title claims abstract description 51
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000012937 correction Methods 0.000 claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 230000004379 myopia Effects 0.000 description 6
- 208000001491 myopia Diseases 0.000 description 6
- 210000001525 retina Anatomy 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004515 progressive myopia Effects 0.000 description 1
- 208000014733 refractive error Diseases 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/027—Methods of designing ophthalmic lenses considering wearer's parameters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/028—Special mathematical design techniques
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/24—Myopia progression prevention
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- Ophthalmology & Optometry (AREA)
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- Optics & Photonics (AREA)
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Abstract
The invention provides a design processing method of a customized out-of-focus lens, which comprises the following steps: a. the distribution of the defocusing condition of the human eyes is obtained by utilizing an optometry method of a full-automatic optometry topographic map instrument; b. obtaining a corresponding defocus correction design value according to the projection pattern used in the optometry method in the step a and the obtained defocus condition distribution, and manufacturing a lens array arranged according to the characteristics of the projection pattern according to the defocus correction design value; c. and c, manufacturing a lens, wherein the lens comprises an inner curved surface, a substrate layer is arranged outside the inner curved surface, a superimposed layer is attached to the outside of the substrate layer, and the superimposed layer adopts the lens array obtained in the step b. The customized out-of-focus lens design and processing method provided by the invention provides customized lenses for wearers in a targeted manner, and the diopter design of each part of the superimposed layer is designed correspondingly according to the out-of-focus topographic map or the refraction topographic map actually measured by human eyes.
Description
Technical Field
The invention relates to a design processing method, in particular to a design processing method of a customized out-of-focus lens.
Background
In recent years, the control technology related to the myopic defocus is continuously developed, and the myopic defocus lens can not only project the image at the central vision position on the retina, but also project the peripheral image in front of the retina, so that the growth speed of the axis of the eye is inhibited, and the aim of preventing myopia is finally achieved. Through patent search, the invention of myopic out-of-focus lenses is already provided. For example: the lens described in japanese patent No. 4891249 is a fresnel multifocal lens; patent CN 111796436A-a lens for slowing down the myopia progression and a preparation method thereof; patent CN201710219871.6 discloses a forming method of a multi-focus bionic compound eye structure. The above patents or the existing progressive defocus lenses are designed and processed based on the lens array with progressive refractive error correction arranged on the lens, and the lens can be designed in the form of spherical surface, aspheric surface, fresnel lens, diffraction lens, or their combination, and the arrangement is basically in the form of concentric circles, spiral curves, etc.
The design of out of focus lens among the prior art can not accomplish complete customization, specialization, and not all out of focus product wearers can both obtain ideal myopia control effect, and the reason is that people and people's basic out of focus state differs, and the out of focus product that adopts unified design has restricted its application effect just like letting all people wear shoes of same size.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a method for designing and processing a customized out-of-focus lens, and solves the problem that the existing out-of-focus lens cannot be customized and customized, so that the myopia control effect of some people is not ideal.
In order to solve the technical problems, the invention provides the following technical scheme:
a design processing method for customizing a defocused lens comprises the following steps:
a. the distribution of the defocusing condition of the human eyes is obtained by utilizing an optometry method of a full-automatic optometry topographic map instrument; for example, the optometric method may be the method described in patent application publication No. CN 114587268A;
b. b, obtaining a defocus correction design value corresponding to the defocus condition distribution according to the projection pattern used in the optometry method in the step a and the obtained defocus condition distribution, and manufacturing a lens array arranged according to the characteristics of the projection pattern according to the defocus correction design value;
c. and c, manufacturing a lens, wherein the lens comprises an inner curved surface, a substrate layer is arranged outside the inner curved surface, a superposed layer is attached to the outside of the substrate layer, and the superposed layer adopts the lens array obtained in the step b.
Further, the defocus correction design value is obtained in such a manner that the defocus degree of a small area a on the projection pattern is C A Then, the defocus correction design value F = F (C) of one or several lenses corresponding to the area a A )，f(C A )＝(log a C A +L O )/lnU S (ii) a Wherein 1 is<a<2; lo represents fundus illuminance; us denotes the optical transfer function value of the optical system.
Further, the curved surface design equation of the lens is
Wherein c is the curvature of the aspheric lens; r is the value of the radius of the lens, r 2 ＝x 2 +y 2 X, y, z represent coordinates of the lens curved surface; k is a quadric coefficient; a is 1 、a 2 、a 3 、a 4 、a 5 The system comprises a plurality of units, wherein each unit is a high-order free-form surface coefficient.
Further, each lens in the lens array adopted by the superimposed layer satisfies the curved surface design equation, and the surface type presented by a single lens is one of a spherical surface, an aspherical surface or a free-form surface according to different defocus correction design values.
Further, each lens in the lens array has a height not exceeding 1mm and a bottom surface diameter not exceeding 1mm.
Further, the surface shape of the inner curved surface is one of a spherical surface, an aspherical surface and a free-form surface, and the surface shape of the substrate layer is one of a spherical surface, an aspherical surface and a free-form surface.
Further, the area covered by the superimposed layer is the whole lens area.
The invention relates to a method for designing and processing a customized out-of-focus lens, which aims to provide the customized lens for a wearer, effectively improves the wearing comfort level and the myopia prevention and control effect, is different from the traditional out-of-focus lens design, creatively provides that the out-of-focus amount and the diopter are measured by using the change of the out-of-focus degree of a pattern projected onto the retina of an eye fundus with high definition, and carries out the design of an overlay layer of an outer curved surface of the lens based on the out-of-focus degree of the projected pattern, the out-of-focus degree of a certain small area on the projected pattern corresponds to the optical power design amount of one or more lenses on the overlay layer, the diopter design of each part of the overlay layer is designed correspondingly according to an out-of-focus topographic map or a refraction topographic map actually measured by human eyes, compared with the traditional design, the myopia control effect is remarkably improved, and the comfort level of the wearer is also increased.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating a process of obtaining a defocus calibration design value in the present invention;
FIG. 2 is a schematic view of a lens array in example 1;
FIG. 3 is a schematic view of a lens array in example 2;
fig. 4 is a schematic view of a lens array in embodiment 3.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
A design processing method for customizing a defocused lens comprises the following steps:
a. the distribution of the defocusing condition of the human eyes is obtained by utilizing an optometry method of a full-automatic optometry topographic map instrument, wherein the optometry method is from the patent application with the patent publication number of CN 114587268A;
b. obtaining a defocus correction design value corresponding to the defocus condition distribution according to the projection pattern used in the optometry method in the step a and the obtained defocus condition distribution, and manufacturing a lens array arranged according to the characteristics of the projection pattern according to the defocus correction design value;
c. and c, manufacturing a lens, wherein the lens comprises an inner curved surface, a substrate layer is arranged outside the inner curved surface, an overlapping layer is attached to the outside of the substrate layer, and the overlapping layer adopts the lens array obtained in the step b.
The defocus correction design value is obtained in such a manner that the defocus degree of a small area A on the projection pattern is C A Then, the defocus correction design value F = F (C) of one or several lenses corresponding to the area a A )，f(C A )＝(log a C A +L O )/lnU S (ii) a Wherein 1 is<a<2; lo represents fundus illuminance; us denotes the optical transfer function value of the optical system. The acquisition of the defocus correction design value is expanded below by way of example:
as shown in fig. 1, after the projected pattern (checkerboard) is projected on the retina, the pattern can be obtained by full-automatic optometry mapping, 5 small regions (the total number of the small regions is m × n, and is set according to the actual use requirement) are schematically drawn in fig. 1, the defocus values a, b, C, d, e corresponding to the 5 small regions and the coordinates thereof on the image can be calculated, and then the functional relationship F = F (C = F) (C) A ) The corresponding defocus corrected design values f (a), f (b), f (c), f (d), f (e) can be calculated. By analogy, m × n defocus correction design values at different positions of the human eye can be obtained, and each defocus correction design value is refractive-corrected by one or several lenses.
After obtaining the correction design value, calculating by using the curved surface design equation of the lens to obtain the lens array, wherein the curved surface design equation of the lens is
Wherein c is the curvature of the aspheric lens; r is the lens radius value, r 2 ＝x 2 +y 2 X, y, z represent coordinates of the lens curved surface; k is a quadric coefficient; a is 1 、a 2 、a 3 、a 4 、a 5 The system comprises a plurality of units, wherein each unit is a high-order free-form surface coefficient.
Each lens in the lens array adopted by the superimposed layer meets a curved surface design equation, and the surface type presented by a single lens is one of a spherical surface, an aspherical surface or a free-form surface according to different defocus correction design values.
The point coordinates of each position in the calculation process can be definitely given, a proper machining tool of a single-point diamond lathe with a C axis is adopted, the given point coordinates are input, the machining of the customized defocused lens can be realized, and then the finished product is manufactured through processes of polishing, coating and the like.
Example 1
The inner curved surface of the lens is a free curved surface, the base layer is designed by adopting a free curved surface, the superposed layer is composed of a round aspheric lens array which is arranged in a square grid shape, as shown in fig. 2, the grid number is m multiplied by n, wherein m multiplied by n represents that when the projection pattern defocusing degree is calculated, the image is divided into m multiplied by n small areas. The area covered by the superposed layer is the whole lens area, and parameters of each aspheric lens are different and are designed independently.
The raw material of the lens is a resin material, and the refractive index and the Abbe number of the lens meet the following conditions: the refractive index was 1.60 and the Abbe number was 40. The height of the aspheric lens is not more than 1mm, and the diameter of the bottom surface is not more than 1mm.
Example 2
The inner curved surface of the lens is a free curved surface, the base layer is designed to be an aspheric surface, the superposed layer is composed of aspheric lens arrays in diamond reticulate pattern arrangement, as shown in fig. 3, the number of reticulate patterns is m × n, wherein m × n represents that when the projection pattern defocusing degree is calculated, the image is divided into m × n small areas. The area covered by the superposed layer is the whole lens area, and parameters of each aspheric lens are different and are designed independently.
The raw material of the lens is a resin material, and the refractive index and the Abbe number of the lens meet the following conditions: the refractive index was 1.67 and the Abbe number was 31. The height of the aspheric lens is not more than 1mm, and the diameter of the bottom surface is not more than 1mm.
Example 3
The inner curved surface of the lens is a free curved surface, the base layer is designed by adopting a free curved surface, the superposed layer is composed of non-rotational symmetrical free curved surface lens arrays which are arranged by orderly pattern combination, the number of the patterns is m multiplied by n, and when the m multiplied by n represents the defocusing degree calculation of the projection pattern, the image is divided into m multiplied by n small areas. The area covered by the superimposed layer is the whole lens area, and the parameters of each free-form surface lens are different and are designed independently.
The raw material of the lens is a resin material, and the refractive index and the Abbe number of the lens meet the following conditions: the refractive index was 1.67 and the Abbe number was 31. The height of the free-form surface lens is not more than 1mm, and the diameter of the bottom surface is not more than 1mm.
The invention relates to a method for designing and processing a customized out-of-focus lens, which aims to provide a customized lens for a wearer, effectively improves wearing comfort and myopia prevention and control effects, is different from the traditional out-of-focus lens design, creatively provides that out-of-focus amount and diopter are measured by using out-of-focus degree change of a pattern projected onto fundus retina in a high-definition mode, and carries out overlay layer design on the outer curved surface of the lens based on the out-of-focus degree of a projected pattern, the out-of-focus degree of a certain small area on the projected pattern corresponds to the focal power design amount of one or more lenses on an overlay layer, and the diopter design of each part of the overlay layer is designed according to an actually measured out-of-focus topographic map or refraction topographic map of human eyes.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A design processing method for customizing a defocused lens is characterized by comprising the following steps:
a. the distribution of the defocusing condition of the human eyes is obtained by utilizing an optometry method of a full-automatic optometry topographic map instrument;
b. obtaining a defocus correction design value corresponding to the defocus condition distribution according to the projection pattern used in the optometry method in the step a and the obtained defocus condition distribution, and then manufacturing a lens array arranged according to the features of the projection pattern according to the defocus correction design value;
c. and c, manufacturing a lens, wherein the lens comprises an inner curved surface, a substrate layer is arranged outside the inner curved surface, a superposed layer is attached to the outside of the substrate layer, and the superposed layer adopts the lens array obtained in the step b.
2. The method of claim 1, wherein the method comprises: the defocus correction design value is obtained in such a manner that the defocus degree of a small area A on the projection pattern is C A Then, the defocus correction design value F = F (C) of one or several lenses corresponding to the area a A )，f(C A )＝(log a C A +L O )/lnU S (ii) a Wherein 1 is<a<2; lo represents fundus illuminance; us denotes the optical transfer function value of the optical system.
3. The method of claim 2, wherein the method comprises: the curved surface design equation of the lens is
Wherein c is the curvature of the aspheric lens; r is the lens radius value, r 2 ＝x 2 +y 2 X, y, z represent coordinates of the lens curved surface; k is a quadric coefficient; a is 1 、a 2 、a 3 、a 4 、a 5 8230is a high-order free-form surface coefficient.
4. The method of claim 3, wherein the method comprises: each lens in the lens array adopted by the superimposed layer meets the curved surface design equation, and the surface type of a single lens is one of a spherical surface, an aspherical surface or a free-form surface according to different defocus correction design values.
5. The method of claim 1, wherein the method comprises: the surface of the inner curved surface is one of a spherical surface, an aspherical surface or a free-form surface, and the surface of the substrate layer is one of a spherical surface, an aspherical surface or a free-form surface.
6. The method of claim 1, wherein the method comprises: the area covered by the superimposed layer is the entire lens area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210981869.3A CN115167002A (en) | 2022-08-16 | 2022-08-16 | Design and processing method of customized out-of-focus lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210981869.3A CN115167002A (en) | 2022-08-16 | 2022-08-16 | Design and processing method of customized out-of-focus lens |
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| CN115167002A true CN115167002A (en) | 2022-10-11 |
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| CN202210981869.3A Withdrawn CN115167002A (en) | 2022-08-16 | 2022-08-16 | Design and processing method of customized out-of-focus lens |
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| CN (1) | CN115167002A (en) |
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- 2022-08-16 CN CN202210981869.3A patent/CN115167002A/en not_active Withdrawn
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