CN105445956A - A designing method of a free-form surface progressive lens correcting astigmatism and the lens - Google Patents
A designing method of a free-form surface progressive lens correcting astigmatism and the lens Download PDFInfo
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Abstract
A designing method of a free-form surface progressive lens correcting astigmatism and the lens are disclosed. The method includes establishing a human eye model so that a human eye and the lens form a complete optical system, determining the meridian of a asymptotic curve of diopter of the lens, optimizing to obtain a progressive lens according to the human eye model and the meridian, and performing astigmatism correction on the surface of the progressive lens to obtain the free-form surface progressive lens correcting astigmatism. The method is simple and convenient. The problem that progressive lenses in the market can not correct astigmatism is overcome. The method can be achieved by ZEMAX software, thus largely reducing the cost.
Description
Technical field
The present invention relates to lens technology field, be specifically related to a kind of method for designing with the free form surface progressive lenses of astigmatism, and the eyeglass that this method for designing obtains.
Background technology
Progressive addition lens is the consecutive variations that application free form surface realizes focal power, realizes looking the surperficial face type in far field and near reading range and dioptric natural sparse model by the zone of transition of dioptric continuous progressive increase.So progressive addition lens only just can correct the eyesight at all visual fields place with one piece of eyeglass, a continuous print can be provided from as far as eyesight closely all clearly.
As shown in Figure 1, the progressive addition lens surface of prior art can be divided into four parts: look far field 1, near reading range 2, progressive district 3 and astigmatism district 4.Wherein, be positioned at the broad area of progressive addition lens the first half depending on far field 1, be in loosen to correct under the state of looking squarely at human eye and look ability far away, clear, the broad visual field is provided.And near reading range 2 is positioned at the below of progressive addition lens, its optical centre is looking about 10 ~ 18mm under center, far field 1, nasal side 2-2.5mm place.Particular location because of progressive lenses type of service, method for designing and correct presbyopia degree, human eye interpupillary distance and have corresponding difference by the difference of eye custom etc.
The principal character of progressive addition lens is: fixing depending on having one section of refractive power continually varying transitional region between near reading range 2 fixing below far field 1 and eyeglass above eyeglass, namely this lens area is called progressive district (or claiming transition region) 3.In this region, the increase gradually of eyeglass refractive power (number of degrees) is reached by the reduction gradually of lens curvature radius, far field 1 and near reading range 2 surperficial face shape and dioptric natural sparse model are looked in realization, making to draw near the visual field of different distance can blur-free imaging without fracture, thus provides from far point near point whole process, the clear vision of continuous print for wearer.Therefore, progressive addition lens is more and more by the concern of people, and its application prospect is very wide.Now domestic and international for using the demand of this kind of eyeglass constantly to rise, but nearly all progressive lenses is all from overseas import, it is expensive, delivery date is grown affects promoting the use of of this kind of eyeglass all very much.
In addition, be aberration district (or claim astigmatism district) 4 in the both sides in progressive district 3, when fixating, this district can metamorphopsia, the degree of distortion and the design of progressive and to add luminosity relevant.Distortion astigmatism is the very formidable key issue of progressive addition lens, although test and join proper progressive district 3 and can give wearer eyesight clearly, but will imaging distortion to a certain degree be produced in both sides, transition region, its deformation extent and deformation direction depend on the difference of lens design and the depth of the additional number of degrees, when eyeball, to leave central area, available transition region far away, and picture element distortion is more obvious.Because near reading range 2 is ball design, so near reading range 2 is wider, the astigmatism that its periphery brings out out is larger, on the contrary, near reading range 2 is narrower, and it brings out peripheral distortion astigmatism and changes with the change of the additional number of degrees equally, it is larger that nearly reading adds the number of degrees, and peripheral distortion problem is more obvious.At the same time, at present also do not occur on the market can the progressive addition lens of astigmatism.
Myopia, long sight and astigmatism are referred to as ametropia or refractive defects, and most human eye all can more or less astigmatism, an eyeball common with ball optical defect.This is the eyeball defect progressively formed period of growing in life.Astigmatism defect is more more complex than ball optical defect, and its size is a vector (directive amount), and majority can c gl, not fearful.Myopia, long sight, astigmatism all belong to ametropia.What is called is ametropia is cause because lenticular curvature (generally: concavo-convex degree) changes.
Light is by after the crystalline lens of normal person, and image focus exactly on retina, and this is called emmetropia.Bathomorphic curvature of lens increases, and light is by after crystalline lens, and before image focuses on retina, farsightedness antithesis.Near-sighted and presbyopic lenticular curature variation is uniform, and astigmatism is not then uniform change, and namely on same crystal, surperficial is concavo-convex irregular, thus causes the focus of light can not gather in a bit, astigmatism that Here it is.If this concavo-convex degree has certain rule, (usually represent with 360 degree of circumference and go up over there.) this just does regular astigmatism, this astigmatism can use astigmatic lens to correct.If crystal is completely irregularly uneven, such eyeglass just cannot machined.Correct the eyeglass of ball light myopia or ball light long sight concave-sphere.The eyeglass of astigmatism is in post mirror.Concave-sphere and post mirror can not replace mutually, but can close and make an eyeglass.
In addition, the design software carrying out lens design is almost monopolized by external major company, therefore, when common Pei Jing enterprise or individual human desires carry out lens design, needs to pay high cost.
The first-selected software of the optical design that optoelectronic areas is known is ZEMAX.This software has two major features, can realize sequence and non-sequence analysis exactly.In the world, this software is applied in design display system by vast, illumination, the use system of imaging, the design ap-plication aspect of laser system and diffused light.ZEMAX is by the design concept of actual optical system, optimizes, and analyzes, a set of comprehensive optical design simulation software that tolerance and form integrate.Comprise all functions of optical design needs, can design all optical systems in practice, optimize, analyze, and have fault tolerance, all these powerful functions are presented in user interface all intuitively.ZEMAX is powerful, and speed is fast, flexibly and easily, is a good comprehensive program.ZEMAX can simulate continuous and discontinuous imaging system and non-imaging system.
In sum, how in conjunction with ZEMAX software, design the progressive addition lens that a kind of price is relatively low, delivery date is short, and on this progressive addition lens, add the function of astigmatism, tool has very great significance and using value.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of method for designing with the free form surface progressive lenses of astigmatism.
Another object of the present invention is to the eyeglass providing a kind of method for designing with the free form surface progressive lenses of astigmatism of the present invention to obtain.
Above-mentioned purpose of the present invention, is realized by following technical scheme:
Have a method for designing for the free form surface progressive lenses of astigmatism, the method comprises:
Set up a human-eye model, make human eye and eyeglass form a complete optical system;
Determine diopter progressive curve meridian;
According to described human-eye model and described meridian, obtain progressive by optimizing;
Described progressive front surface carries out astigmatism correction, obtains the free form surface progressive lenses with astigmatism.
Method for designing of the present invention, preferably, described human-eye model arranges there is 0.6mm on pupil surface side-play amount in X-direction.
Method for designing of the present invention, preferably, during design diopter progressive curve meridian, makes corresponding progressive district head and near reading range is shorter.
Method for designing of the present invention, preferably, described in make corresponding progressive district head and the less method near vision zone is make the power variation rate of power profile less.
Method for designing of the present invention, preferably, obtains the step of progressive, comprising:
Design the initial configuration of progressive, obtain initially progressive; And
To described initially progressive be optimized, progressive after being optimized.
Method for designing of the present invention, preferably, the described initially design procedure of progressive, comprising:
A) distance between the cornea in progressive and human-eye model is set;
B) lens of a single focus are designed;
C) set many structures according to the meridian designed, described many structures comprise: the first structure, and when adding light and being 0D, the eyeball phantom in human-eye model rotates 0 degree; Second structure, when adding light+1D, the eyeball phantom in human-eye model rotates 15 degree; 3rd structure, when adding light+2D, the eyeball phantom in human-eye model rotates 30 degree.
D) object distance being set, representing long sight, transition and myopia three kinds of states by arranging object distance.Described first structural simulation distance vision state; Described second structural simulation transition state, also namely eyeball turns downwards; Described 3rd structural simulation near vision state.
Method for designing of the present invention, preferably, when designing described progressive, front surface is aspheric design, and rear surface is Random Curved Surface Designing.
Method for designing of the present invention, preferably, to described initially progressive be optimized, the step of progressive after being optimized, comprising:
A) described optical system is made to carry out rational Design on Plane;
B) variable of described optical system is set;
C) setting of evaluation function.
D) be optimized.
Method for designing of the present invention, preferably, sets the variable of described optical system, if top step number is 44, normalization radius is 20, and wherein said evaluation function is one group makes described optical system close to the numeric representation of one group of target of specifying.
Method for designing of the present invention, preferably, the numerical value of described evaluation function is picture element, focal length or magnification; The numerical value of wherein said evaluation function is less, and the performance representing optical system is better, and 0 value represents perfect condition.
Method for designing of the present invention, preferably, rear surface adopts the quadric surface formula of expansion to construct, and formula is:
Method for designing of the present invention, preferably, described to described initially progressive be optimized, the step of progressive after being optimized, also comprise: rotate 6 degree by the progressive region of progressive after described optimization, and balanced design is carried out to left and right sides eyeglass corresponding point.
Method for designing of the present invention, preferably, described progressive front surface carries out astigmatism correction, obtains the step of the free form surface progressive lenses with astigmatism, comprising:
A) rear surface of described progressive aspheric anterior surface as astigmatic lens is extracted;
B) thickness of astigmatic lens is set to 0.01mm, then optimizes the front surface of described astigmatic lens to complete astigmatism correction;
C) astigmatic lens completing astigmatism correction is added on progressive after optimization;
D) in three-dimensional machinery software, become an entity, finally obtain the free form surface progressive lenses with astigmatism;
E) simulation process of ray tracing is carried out.
Method for designing of the present invention, preferably, the front surface of described optimization astigmatic lens completes the method for astigmatism correction is change the aspheric surface of described astigmatic lens, its meridian diopter is remained unchanged, and on its axis of astigmatism, adds upper prop mirror carry out astigmatism.
Eyeglass of the present invention, obtained by method for designing of the present invention.
Eyeglass of the present invention, preferably, wherein said eyeglass is PC material.
Beneficial effect of the present invention is, the method for designing with the free form surface progressive lenses of astigmatism provided by the invention, by setting up a set of method for designing simply and easily, ZEMAX software simulating can be utilized, can solve progressive lenses on the market can not the problem of astigmatism, and can die forming, greatly reduce costs.
Method for designing of the present invention can be applicable to the design of multi-purpose progressive lenses.Astigmatism design and asymmetric design can also be added, make single eyeglass not only can astigmatism but also diopter can be made to distribute form asymmetric distribution, realize the symmetry of sight line and video on eyes physiology, ensure when lenses fitted, equilibrium, sharp binocular vision can be obtained.
Method for designing of the present invention, can set up the tachnical storage of the design of free form surface progressive lenses of the submicron order surface figure accuracy of localization and nanoscale rough degree, injection moulding and polishing.Break away from the dependence for external progressive lenses, significantly reduce costs.
Accompanying drawing explanation
Fig. 1 is the progressive addition lens schematic diagram of prior art.
The human-eye model schematic diagram that the method for designing that Fig. 2 is the embodiment of the present invention uses.
Fig. 3 is that the side-play amount of the method for designing of the embodiment of the present invention selects interface schematic diagram.
Fig. 4 for meridian design in the power profiles versus schematic diagram of soft or hard two kinds of methods for designing.
Fig. 5 is the initial configuration setting schematic diagram of the method for designing of the embodiment of the present invention.
Fig. 6 is the MTF curve map of the initial configuration of the method for designing of the embodiment of the present invention.
Fig. 7 be the method for designing of the embodiment of the present invention by arrange object distance represent long sight, transition and myopia three kinds of view.
Fig. 8 is the MTF curve map adding light+1D in corresponding diagram 7.
Fig. 9 is the MTF curve map adding light+2D in corresponding diagram 7.
Figure 10 is many structural representations in progressive optimizing process of the method for designing of the embodiment of the present invention.
Figure 11 is the MTF curve map adding light 0D in corresponding Figure 10.
Figure 12 is the MTF curve map adding light+1D in corresponding Figure 10.
Figure 13 is the MTF curve map adding light+2D in corresponding Figure 10.
Figure 14 is progressive schematic diagram after the optimization of the method for designing of the embodiment of the present invention.
Figure 15 is the centre distance (PITCH) of progressive of Figure 14 and dioptric change schematic diagram.
Figure 16 is the spherical diagram of progressive of Figure 14.
Figure 17 is the cylinder figure of progressive of Figure 14.
Figure 18 is astigmatism symptom schematic diagram.
Figure 19 is the optical principle schematic diagram of astigmatism.
Figure 20 is the comparison diagram before and after astigmatism correction.
Figure 21 is progressive vertical view after the method for designing of the embodiment of the present invention is optimized.
Figure 22 be the embodiment of the present invention method for designing by astigmatic lens with optimize after progressive fit and form the schematic diagram of embodiment of the present invention eyeglass.
Figure 23 is the formation schematic diagram of progressive of astigmatism in the method for designing of the embodiment of the present invention.
Figure 24 is the schematic diagram that in the method for designing of the embodiment of the present invention, transition structure and meridian corresponding point are echoed.
Embodiment
The exemplary embodiments embodying feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various changes in different embodiments, it neither departs from the scope of the present invention, and explanation wherein and accompanying drawing are the use when explain in itself, and is not used to limit the present invention.
The method for designing with the free form surface progressive lenses of astigmatism of the embodiment of the present invention, mainly comprises Modling model, determines meridian, obtains progressive and the large step of astigmatism correction four.Below be specifically introduced respectively.
Certainly, alternatively the method for designing of the embodiment of the present invention comprises two steps, a step is the design procedure of progressive lenses (or claiming progressive), and it comprises Modling model, determines meridian, obtains initially progressive, optimizes progressive four steps; Another step is that astigmatism correction is added progressive.
One, Modling model
The first step sets up human-eye model, and the theoretical foundation of the human-eye model in the present embodiment is Liou & Brennan1997 human-eye model.As shown in Figure 2, this human-eye model shows the structures such as cornea, pupil, aqueous humor (aqueous), crystalline lens, vitreum and retina.
When reading, human eye can downwardly towards interior motion, so in above-mentioned human-eye model, pupil will depart from a little, therefore, is to consider above-mentioned factor carrying out design.
Method for designing of the present invention, needs to use optical software and assists, such as optical design software ZEMAX and three-dimensional machinery software as Catia, in following introduction, all to use ZEMAX software to be introduced.
As shown in Figure 3, in the surface properties interface of ZEMAX software, for the exercise habit of eyeball when reading, there is 0.1-0.8mm on pupil surface side-play amount in X-direction is set, the preferably side-play amount of 0.6mm.The choosing of " AfterSurface " parameter most " ReverseThisSurface (this surface of reversing) " is then set.
Why the method for designing of the embodiment of the present invention, first will set up human-eye model, is to make human eye and eyeglass form a complete optical system, makes the eyeglass designed can have better adaptability and comfortableness.
Two, meridian design
Usually, the difference that progressive addition lens designs due to meridian is divided into " firmly " and " soft " two kinds, Figure 4 shows that the power profile (powerprofile) of two kinds of methods for designing, in Fig. 4, left side is meridian " soft " method for designing, and in Fig. 4, right side is meridian " firmly " method for designing.
As shown in Figure 4, " firmly " design wherein, progressive power variation is fast, and zone of transition is short and narrow.Usually more stable distance vision zone and near vision zone is had.Soft progressive power variation relaxes, and zone of transition is longer, and near reading range is smaller.But comfortable wearing, is out of shape less when seeing object.
Different meridian designs will bring diverse result, and the quality of progressive depends on meridianal design completely.
The method for designing of the present embodiment, preferably takes soft method for designing wherein, makes corresponding progressive district head and near reading range is shorter.Further, wherein saidly corresponding progressive district head is made and the less method near vision zone is make the power variation rate of power profile less.
The design adopts soft method for designing to obtain eyeglass, and namely the gradation zone of eyeglass is longer, and power progression speed is slow, and aberration is mild soft distribution in wider region, and edge transition district astigmatism greatly reduces.
Three, progressive is obtained
Concretely, being according to described human-eye model and described meridian, obtaining progressive by optimizing.In this step, comprise the design of progressive initial configuration, optimization two steps of progressive, progressive actual measurement after can also being optimized afterwards.Below introduce respectively:
1, the initial configuration design of progressive
First be the distance between progressive of setting and cornea.
Then, according to the distance between progressive and cornea, as shown in Figure 5, design the lens of a single focus, complete initial configuration setting.The MTF curve map (optical-modulation transfer function curve map) of the lens of above-mentioned single focus, as shown in Figure 6, the ordinate of MTF curve map is normalized value, and horizontal ordinate is frequency.
Then, according to the meridian designed in aforementioned correlation step, many structures are set.As shown in Figure 7, when adding light and being 0D, eyeball phantom rotates 0 degree; When adding light+1D, eyeball phantom rotates 15 degree; When adding light+2D, eyeball phantom rotates 30 degree.
Finally object distance is set.Long sight, transition and myopia three kinds of states are represented by arranging object distance.First structural simulation distance vision state.Second structural simulation intermediateness, namely eyeball is slightly to lower turn.3rd structural simulation near vision state, eyeball turns obvious downwards.The second structure wherein, is not limited to be that when adding light+1D, eyeball phantom rotates 15 degree, it can be transition structure, and this structure can be subdivided into a lot of structure, such as: add light+0.25D, + 0.5D ,+0.75D ,+1D, + 1.25D ,+1.5D ,+1.75D, it is not a fixing value, these structures and meridian corresponding point are echoed one by one, and as shown in figure 24, object is better with meridian matching.First structure and the 3rd structure are set progressive bound.
Shown in Fig. 7 is three kinds of states, and the MTF curve map of its correspondence is as shown in Fig. 6, Fig. 8 and Fig. 9.
2, progressive is optimized
In ZEMAX, front surface is set to aspheric surface, rear surface is free form surface (extendedpolynomial) design, and radius-of-curvature changes with diopter.
In ZEMAX, if radius, asphericity coefficient and high-order term are variable.
In interpolated data editing machine (extradateeditor), top step number can be set as 44, normalization radius is 20.The most high-order that this means XY is X
8y
8.
Usually, constructing quadric formula is:
In the present embodiment, front surface is even aspheric surface (evenasphere).
Even aspheric surface, it is a kind of reasonable symmetric polynomial non-spherical surface, carry out polynomial expansion by departing from of a sphere (or conical surface describe aspheric surface) and obtain, above-mentioned even aspheric surface model only utilizes the even item of polar coordinates r to describe aspheric surface.Above-mentioned model also contemplates basic radius-of-curvature and conic constant.Above-mentioned curve recess (surfacesag) is
Its parameter used is followed successively by:
For the optimization of progressive, ZEMAX provides very powerful optimizational function, and it has the ability to improve the lens design that those provide a rational starting point and a series of parameter.For progressive, parameter can be curvature, thickness, glass, circular cone coefficient, supplemental characteristic, special data, and the numeric data of some various structures.ZEMAX employs movable damped least square method, and this algorithm can optimize the evaluation function be made up of the desired value adding weight, and these targets are called " operand " by value.The acquiescence evaluation function that ZEMAX has some different.These evaluation functions can be changed easily in evaluation function editing interface.
The optimization of progressive needs three steps: 1) set up the reasonable optical system that can be carried out ray tracing; 2) setting of variable; 3) setting of evaluation function.
How evaluation function makes an optical system close to the numeric representation of one group of target of specifying if being one.ZEMAX employs sequence of operations number, the constraint that their difference representative systems are different and target.The target of operand representative is as picture element, focal length or magnification, or some other.
The weighting root sum square of the desired value of each operand in these evaluation functions and list and the difference of actual value square is proportional.Evaluation function is definition like this, so 0 value represents perfect condition.Optimizing algorithm will make these functional values little as far as possible, think that the one of the result that system reaches represents so evaluation function should be for you.
The optimizing process described before utilization, in an optimizing process, one group of data before optimization are as follows:
Surface data details (SURFACEDATADETAIL):
Data before corresponding above-mentioned optimization, the data after optimization are as follows:.
3, progressive actual measurement after optimizing
After optimization, can survey progressive after optimization, the result of actual measurement is as shown in Figure 14-Figure 17.
Four. astigmatism correction adds the method for designing of progressive lenses.
As shown in Figure 18 and Figure 19, the light entering eyeball can not pool a focus, is exactly astigmatism.Clinical manifestation is kopiopia and headache, especially in long-time reading or when using eye.
As shown in figure 20, astigmatism often due to cornea irregular deformation caused by.Astigmatism, as shown in figure 21, usual way adds cylindrical lens before eyeball.Carry out astigmatism correction on the front surface, namely change aspheric surface, its meridian diopter remains unchanged, and adds upper prop mirror at its axis of astigmatism and carry out astigmatism.
Equally, adding astigmatism function to progressive is also come by following 5 steps.
1, extract progressive aspheric anterior surface the designing rear surface as astigmatic lens above, also namely the rear surface of astigmatic lens is aspheric surface, like this, when rear surface is determined, it is required to determine that it front surface.
2, in this step, the thickness of astigmatic lens can be set to 0.01mm, the front surface then optimizing it adds the astigmatism of+1D.
3, as shown in Figure 22 and Figure 23, the astigmatic lens optimized is added on progressive that designs above, because the front surface of the rear surface of astigmatic lens and progressive is just the same, so both can overlap.
4, in three-dimensional machinery software, the astigmatic lens after coincidence and progressive is made to be an entity.
5, the simulation process of ray tracing is finally carried out.
Introduce the making of the eyeglass of the embodiment of the present invention below again.
In eyeglass manufacturing process, polishing technology be used, for the aspheric surface of Progressive addition lens and the polishing of free form surface, require the shape error reaching nano level surfaceness and sub-micron.Traditional buffing machine fails to reach requirement, and staff polishing, effect differs, also easy failure mode, makes lens deformation.When polishing Progressive addition lens mould, use ultraprecise free form surface seven axle polishing technology processing mold surface, to reach nano level surfaceness.In addition, measure rear at use fine measuring instrument and after calculating, carry out correction of the flank shape by ultraprecise free form surface seven axle polishing technology, thus obtain closest to ideal form, for Progressive addition lens brings the effect expected close to designer.
In eyeglass manufacturing process, also injection molding technology will be used.Manufacture and the processing of current most of Progressive addition lens are all short runs, and non-injection moulding eyeglass, makes it on the high side, fails popular.In this industry, introduce and use injection molding technology to manufacture large batch of Progressive addition lens just shape, then just doing minimal amendment as requested, effectively can increase efficiency and reduce costs
In sum, although this novelly discloses as above with preferred embodiment, so itself and be not used to limit that this is novel.Have in this novel art and usually know the knowledgeable, not departing from these novel spirit and scope, when doing various changes and retouching.Therefore, this novel protection domain when depending on after the attached claim person of defining be as the criterion.
Claims (16)
1. have a method for designing for the free form surface progressive lenses of astigmatism, it is characterized in that, the method comprises:
Set up a human-eye model, make human eye and eyeglass form a complete optical system;
Determine diopter progressive curve meridian;
According to described human-eye model and described meridian, obtain progressive by optimizing;
Described progressive front surface carries out astigmatism correction, obtains the free form surface progressive lenses with astigmatism.
2. the method for designing of eyeglass as claimed in claim 1, wherein said human-eye model arranges there is 0.1-0.8mm on pupil surface side-play amount in X-direction.
3. the method for designing of eyeglass as claimed in claim 2, wherein said side-play amount is 0.6mm.
4. the method for designing of eyeglass as claimed in claim 1, when wherein designing diopter progressive curve meridian, makes corresponding progressive district head and near reading range is shorter.
5. the method for designing of eyeglass as claimed in claim 1, wherein obtains the step of progressive, comprising:
Design the initial configuration of progressive, obtain initially progressive; And
To described initially progressive be optimized, progressive after being optimized.
6. the method for designing of eyeglass as claimed in claim 5, the wherein said initially design procedure of progressive, comprising:
A) distance between the cornea in progressive and human-eye model is set;
B) lens of a single focus are designed;
C) set many structures according to the meridian designed, described many structures comprise: the first structure, and when adding light and being 0D, the eyeball phantom in human-eye model rotates 0 degree; Second structure is transition structure; 3rd structure, when adding light+2D, the eyeball phantom in human-eye model rotates 30 degree.
D) object distance being set, representing long sight, transition and myopia three kinds of states by arranging object distance.Described first structural simulation distance vision state; Described second structural simulation transition state, also namely eyeball turns downwards; Described 3rd structural simulation near vision state.
7. the method for designing of eyeglass as claimed in claim 1, when wherein designing described progressive, front surface is aspheric design, and rear surface is Random Curved Surface Designing.
8. the method for designing of eyeglass as claimed in claim 5, wherein to described initially progressive be optimized, the step of progressive after being optimized, comprising:
A) described optical system is made to carry out rational Design on Plane;
B) variable of described optical system is set;
C) setting of evaluation function.
D) be optimized.
9. the method for designing of eyeglass as claimed in claim 8, wherein the variable of described optical system is set, if top step number is 44, normalization radius is 20, and wherein said evaluation function is one group makes described optical system close to the numeric representation of one group of target of specifying.
10. the method for designing of eyeglass as claimed in claim 9, the numerical value of wherein said evaluation function is picture element, focal length or magnification; The numerical value of wherein said evaluation function is less, and the performance representing optical system is better, and 0 value represents perfect condition.
The method for designing of 11. eyeglasses as claimed in claim 7, described rear surface adopts the quadric surface formula of expansion to construct, and formula is:
The method for designing of 12. eyeglasses as claimed in claim 4, wherein said to described initially progressive be optimized, the step of progressive after being optimized, also comprises: rotate 6 degree by the progressive region of progressive after described optimization, and carry out balanced design to left and right sides eyeglass corresponding point.
The method for designing of 13. eyeglasses as claimed in claim 1, wherein on described progressive front surface, carry out astigmatism correction, obtain the step of the free form surface progressive lenses with astigmatism, comprising:
A) rear surface of described progressive aspheric anterior surface as astigmatic lens is extracted;
B) thickness of astigmatic lens is set to 0.01mm, then optimizes the front surface of described astigmatic lens to complete astigmatism correction;
C) astigmatic lens completing astigmatism correction is added on progressive after optimization;
D) in three-dimensional machinery software, become an entity, finally obtain the free form surface progressive lenses with astigmatism;
E) simulation process of ray tracing is carried out.
The method for designing of 14. eyeglasses as claimed in claim 13, the method that the front surface of wherein said optimization astigmatic lens completes astigmatism correction is, change the aspheric surface of described astigmatic lens, its meridian diopter is remained unchanged, and on its axis of astigmatism, add upper prop mirror carry out astigmatism.
15. 1 kinds of eyeglasses obtained by the arbitrary described method for designing of claim 1-14.
16. eyeglasses as claimed in claim 15, wherein said eyeglass is PC material.
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| CN202110184934.5A CN112946922B (en) | 2014-08-28 | 2014-08-28 | Method for designing free-form surface progressive lens with astigmatism correction function and lens |
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| CN202110184934.5A Active CN112946922B (en) | 2014-08-28 | 2014-08-28 | Method for designing free-form surface progressive lens with astigmatism correction function and lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112505945A (en) * | 2020-11-23 | 2021-03-16 | 魏炳松 | Preparation method of double-sided composite thinning zoom myopia lens |
| CN112602001A (en) * | 2018-06-27 | 2021-04-02 | 卡尔蔡司光学国际有限公司 | Computer-implemented method for generating a target design, data processing system and computer program with instructions for generating a target design, storage medium, method for providing an ophthalmic lens, storage medium with a numerical representation of an ophthalmic lens, and method for manufacturing an ophthalmic lens |
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| JP2002311397A (en) * | 2001-04-19 | 2002-10-23 | Asahi Optical Co Ltd | Progressive refracting power lens and method of manufacturing progressive refracting power lens |
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| US20050099596A1 (en) * | 2003-02-19 | 2005-05-12 | Kazutoshi Kato | Progressive refractive power lens |
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Cited By (2)
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| CN112602001A (en) * | 2018-06-27 | 2021-04-02 | 卡尔蔡司光学国际有限公司 | Computer-implemented method for generating a target design, data processing system and computer program with instructions for generating a target design, storage medium, method for providing an ophthalmic lens, storage medium with a numerical representation of an ophthalmic lens, and method for manufacturing an ophthalmic lens |
| CN112505945A (en) * | 2020-11-23 | 2021-03-16 | 魏炳松 | Preparation method of double-sided composite thinning zoom myopia lens |
Also Published As
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| CN112946922A (en) | 2021-06-11 |
| CN112946922B (en) | 2022-10-11 |
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