CN100495124C

CN100495124C - Both-sided aspherical varifocal lens and method of designing it

Info

Publication number: CN100495124C
Application number: CNB2004800409499A
Authority: CN
Inventors: 木谷明; 菊地吉洋; 畑中隆志
Original assignee: Hoya Corp
Current assignee: Hoya Corp
Priority date: 2003-11-27
Filing date: 2004-11-29
Publication date: 2009-06-03
Anticipated expiration: 2024-11-29
Also published as: CN1906523A

Abstract

The present invention provided a bi-aspherical type progressive-power lens which provides an excellent visual acuity correction for prescription values and a wide effective visual field with less distortion in wearing, by reducing a magnification difference of an image between a distance portion and a near portion of a lens, and a method of designing the same. A progressive action of a progressive-power lens is divided in the vertical direction and the horizontal direction of the lens and then an optimal sharing ratio between the front and rear two surfaces of the object side and the eyeball side is set in each direction to configure one bi-aspherical type progressive-power lens, a sharing ratio of a progressive action in the horizontal direction of a rear surface (eyeball side surface) is set higher so that an advantage of increasing the visual field in the horizontal direction can be obtained, a sharing ratio of a progressive action in the vertical direction of a front surface (object side surface) is set higher so that a disadvantage of increasing an eyeball turning angle between the distance and near portions in the vertical direction can be restrained, also a wide effective visual field with less distortion in wearing can be provided by reducing a magnification difference of an image between the distance portion and the near portion on the progressive-power lens, further making it possible to obtain a bi-aspherical type progressive-power lens capable of reducing a machining time and cost by making it possible to machine only the surface of an eyeball side as a bilaterally asymmetrical curved surface coping with a convergence action of an eye in near vision after receiving an order, by using 'bilaterally symmetrical semi-finished product' as an object side surface of the progressive refractive power lens.

Description

Both-sided aspherical type gradual change focal power eyeglass and method for designing thereof

Technical field

For example the present invention relates to, glasses are used as the eyeglass that the presbyopia uses with gradual change focal power eyeglass, relate to the effect of gradual change focal power and cut apart on second refractive surface of first refractive surface that is distributed in object side surface and eyeball side surface, and give both-sided aspherical type gradual change focal power eyeglass and method for designing thereof with the number of degrees (Df) and the adding number of degrees (ADD) far away described first surface and described second surface altogether according to prescription values.

Background technology

Gradual change focal power eyeglass is being because to have be that the presbyopia is not easy to be found out to be the advantage of presbyopia with glasses in eyeglass in appearance, or has from remote to the advantage of closely can free of discontinuities seeing clearly continuously etc., and by general extensive utilization.Be used to see the visual field at a distance, be used to see the visual field nearby and be used to see the situation in a plurality of like this visuals field, the visual field of their intermediate distances but in limited eyeglass area, stay out of separatrix ground configuration, so the broad degree in each visual field is not necessarily abundant.And mainly be to have the distortion of perceptual image or the zone of rocking etc. in the visual field of side, this is the distinctive shortcoming of well-known gradual change focal power eyeglass.

To improve the distinctive shortcoming of these gradual change focal power eyeglasses is that purpose always has various motions, and the face structure of these existing gradual change focal power eyeglasses nearly all is the combination of disposing " sphere " or " astigmatic face " in object side surface configuration " transitional surface ", at the eyeball side surface.Opposite with them, as additional at the eyeball side surface be the Atoral Variplas that the gradual change focal power eyeglass of feature has in 1970 French EsselOptical Co. (showing Essilor) to sell with " gradation ".

By the prior art of motion, the technology of record in the

patent documentation

1,2 etc. is for example arranged as in recent years, generally be called reverse side gradual change (or concave surface gradual change).The fundamental purpose of the face structure in the reverse side gradual change of this patent documentation 1 motion is that part or all of the necessary adding number of degrees is shared on the eyeball side surface from object side surface, reduce the difference of magnification of usefulness far away portion and the picture of nearly usefulness portion like this, with the distortion that improves picture or rock.

That is, " gradation " all cancellations, only additional (fusion) gives " transitional surface " that regulation adds the number of degrees to patent documentation 1 on the eyeball side surface by object side surface being set at sphere and the symmetrical aspheric surface of rotation.2 motions of patent documentation: reduce the adding number of degrees on the object side surface " transitional surface " forr a short time than setting, and on " sphere " or " astigmatic face " of " transitional surface " additional (fusion) reverse side that gives the insufficient section adding number of degrees.

Purpose or according to though difference is arranged, but as other prior art that has at the gradual change focal power eyeglass of additional " gradation " structure of eyeball side surface, patent documentation 3, patent documentation 4, patent documentation 5, patent documentation 6 etc. are for example arranged, and on the two sides of eyeglass, have " gradation " prior art with conduct similarly described in the patent documentation 2, patent documentation 7 or patent documentation 8 are for example arranged.The common ground of these prior aries is that object side and this two sides of eyeball side of the necessary adding number of degrees being given eyeglass share.

Patent documentation 1:WO97/19382 communique

Patent documentation 2:WO97/19383 communique

Patent documentation 3: special public clear 47-23943 communique

Patent documentation 4: the spy opens clear 57-10112 communique

Patent documentation 5: the spy opens flat 10-206805 communique

Patent documentation 6: the spy opens the 2000-21846 communique

Patent documentation 7: the spy opens the 2000-338452 communique

Patent documentation 8: the spy opens flat 6-118353 communique

The fundamental purpose of above-mentioned prior art is that part or all of the adding number of degrees necessary in the gradual change focal power eyeglass shared on the eyeball side surface from the object side surface of eyeglass, reduce on this eyeglass the difference of magnification of usefulness portion far away and nearly usefulness portion like this, the distortion of the picture that causes by difference of magnification with improvement or rock.But it is few to obtain these clearly records that improve the effect basis, and only only being has part to put down in writing in patent documentation 2 (the following prior art 1 that is designated as sometimes) waits.Be the calculating formula that discloses the eyeglass multiplying power (SM) shown in following (1) formula～(3) formula in the patent documentation 2, and be used as the basic evaluating of lens design.

Content at this referenced patents document 2.

" the multiplying power SM of eyeglass generally is expressed from the next.

SM＝Mp×Ms (1)

At this, Mp is called the focal power factor, and Ms is called form factor.The distance setting of eyeglass from the summit (inboard summit) of the face of eyeball one side to eyeball for the top apart from L, the focal power on inboard summit (inboard summit focal power) is set at Po, is the thickness setting of center of lens t, the refractive index of eyeglass is set at n, the baseline of the face of eyeglass object side (focal power) when being set at Pb, then following expression.

Mp＝1/(1-L×Po) (2)

Ms＝1/(1-(t×Pb)/n) (3)

In the calculating of formula (2) and formula (3), respectively inboard summit focal power Po and baseline Pb have been used diopter (D), adjust the distance L and thickness t have been used rice (m) ".

Patent documentation 2 uses the calculating formula of these eyeglass multiplying powers (SM) to calculate the difference of magnification of usefulness far away portion and nearly usefulness portion, owing to its difference of magnification is few as the distortion that improves picture or rock.

According to the present application person's research, think that described prior art 1 and other prior art relatively have certain effect, and distinguish for carry out more high performance lens design also need to discuss following some.

Original contained in the basic evaluating that a, described prior art 1 uses is the parameter that should only nearby be suitable for eyeglass central authorities.This also can understand according to " eyeglass from the summit of the face of eyeball one side to the distance L of eyeball " and " thickness t of center of lens " such record.Be among the embodiment of patent documentation 2, make should be only for being positioned at basic evaluating that eyeglass central authorities nearby far are suitable for portion for being positioned at closely also being suitable for of the lower position far away, so the residual possibility that produces error therefrom with portion apart from center of lens.

B, prior art 1 have also added " refractive index n of eyeglass " except above-mentioned L, t, Po, Pb, calculated the multiplying power SM of eyeglass by these five basic evaluatings.Just can understand but in fact the eyeglass that has the number of degrees is tilted forward and back when seeing at once, as size influenced strongly by " angle of sight line and eyeglass face ".Therefore think particularly in the multiplying power calculating of nearly usefulness the portion that is arranged in the lower position far away, can not ignore this " angle of sight line and eyeglass face " apart from center of lens.Therefore in the lens design of prior art 1, have by not considering that " angle of sight line and eyeglass face " causes the possibility that produces error with regard to calculating the eyeglass multiplying power.

The notion that except the record of astigmatic lens application examples, does not have direction in " multiplying power " of c, prior art 1.Because this notion so for example be positioned at the situation that " vertically different with horizontal multiplying power " are closely just arranged with portion of the lower position far away apart from center of lens, the possibility of error do not occur producing therefrom.

D, calculate for the multiplying power of nearly usefulness portion in order correctly to carry out, must be distance to looking target, promptly " to object distance from " append as the calculating factor.But prior art 1 for this " to object distance from " do not consider.Therefore can not negate that the possibility that is caused error by this consideration is not also arranged.

The influence that e, prior art 1 there are not consideration to be produced by prismatic action in multiplying power is calculated.Therefore the possibility that is caused error by this consideration is not also arranged.

Like this, from more accurate viewpoint of carrying out " multiplying power " calculating, prior art 1 also differs and satisfies surely.

Summary of the invention

The present invention develops in order to solve this problem, purpose be to provide a kind of considered above-mentioned " angle of sight line and eyeglass face " and " to object distance from " influence, reduce in the eyeglass far difference of magnification, give good correcting vision and in both-sided aspherical type gradual change focal power eyeglass and the method for designing thereof of wearing the broad scope effective field of view that the time spent distorts few for prescription values with portion and near portion image.

In order to solve described problem, the present invention has following structure.

(first structure)

A kind of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface,

Far lateral surfaces focal power and the vertical surperficial focal power with number of degrees measuring position F1 is set at DHf, DVf in respectively described first refractive surface,

Nearly lateral surfaces focal power and vertical surperficial focal power when being set at DHn, DVn with number of degrees measuring position N1 in described first refractive surface, satisfy following relational expression respectively:

DHf+DHn＜DVf+DVn, and DHn＜DVn

And, the F1 of described first refractive surface and the surperficial astigmatism composition among the N1 are offset at described second refractive surface, described first and second refractive surfaces are given to use the number of degrees (Df) and add the number of degrees (ADD) according to the far away of prescription values altogether,

The astigmatism distribution of described first refractive surface is to be boundary and left-right symmetric by a described meridian with number of degrees measuring position F1 far away, the astigmatism distribution of described second refractive surface is to be boundary and the left and right sides is asymmetric with the meridian with number of degrees measuring position F2 far away by this second refractive surface, and the nearly configuration of this second refractive surface with number of degrees measuring position N2 be only with predetermined distance inwardly near nasal side.

According to this structure, expanded the visual field in the horizontal direction by improving the sharing ratio of the horizontal gradation of eyeball side surface, by the ratio of sharing that improves the vertical gradation of object side surface far and near sight line is moved easily simultaneously, can provide to have two visuals field of the few broadness of astigmatism and wear the gradual change focal power eyeglass that the time spent rocks or distort few.

(second structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the both-sided aspherical type gradual change focal power eyeglass of first structure,

Described both-sided aspherical type gradual change focal power eyeglass closely is configured at nasal side close and thin in the temples side with the transmission astigmatism distribution in the portion.

According to this structure, on the basis of first effect structure, add particularly from nearly usefulness portion approximately at right and left eyes to the transmission astigmatism of side, two better eye visions can be arranged.

(the 3rd structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface,

DHf+DHn＜DVf+DVn, and DHn＜DVn

According to this structure, expanded the visual field in the horizontal direction by improving the sharing ratio of the horizontal gradation of eyeball side surface, by the ratio of sharing that improves the vertical gradation of object side surface far and near sight line is moved easily simultaneously, can provide to obtain having two visuals field of the few broadness of astigmatism and wear the method for designing that the time spent rocks or distort gradual change focal power eyeglass few.

(the 4th structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is in the method for designing of the both-sided aspherical type gradual change focal power eyeglass of the 3rd structure,

According to this structure, on the basis of the 3rd effect structure, add particularly from nearly usefulness portion approximately at right and left eyes to the transmission astigmatism of side, two better eye visions can be arranged.

(the 5th structure)

DHf+DHn＜DVf+DVn, and DHn＜DVn

The average number of degrees of described first refractive surface distribute and are set to by a described meridian with number of degrees measuring position F1 far away to be boundary and left-right symmetric, the average number of degrees of described second refractive surface distribute, and to be set to the meridian with number of degrees measuring position F2 far away by this second refractive surface be boundary and the left and right sides is asymmetric, and the nearly configuration with number of degrees measuring position N2 of this second refractive surface is only with the inside close nasal side of predetermined distance.

According to this structure, expanded the visual field in the horizontal direction by improving the sharing ratio of the horizontal gradation of eyeball side surface, by the ratio of sharing that improves the vertical gradation of object side surface far and near sight line is moved easily simultaneously, can provide to have two wide visuals field of appropriate average degree SerComm and wear the time spent and rock, distort and blur few gradual change focal power eyeglass.

(the 6th structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the both-sided aspherical type gradual change focal power eyeglass of the 5th structure,

According to this structure, on the basis of the 5th effect structure, add particularly from nearly usefulness portion approximately at right and left eyes to the average number of degrees of the transmission of side, two better eye visions can be arranged.

(the 7th structure)

DHf+DHn＜DVf+DVn, and DHn＜DVn

According to this structure, expanded the visual field in the horizontal direction by improving the sharing ratio of the horizontal gradation of eyeball side surface, by the ratio of sharing that improves the vertical gradation of object side surface far and near sight line is moved easily simultaneously, can provide to obtain having two wide visuals field of appropriate average degree SerComm and wear the method for designing that the time spent rocks, distorts and blur few gradual change focal power eyeglass.

(the 8th structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is in the method for designing of the both-sided aspherical type gradual change focal power eyeglass of the 7th structure,

According to this structure, on the basis of the 7th effect structure, add particularly from nearly usefulness portion approximately at right and left eyes to the average number of degrees of the transmission of side, two better eye visions can be arranged.

(the 9th structure)

Nearly lateral surfaces focal power and vertical surperficial focal power when being set at DHn, DVn with number of degrees measuring position N1 in respectively described first refractive surface, satisfy following relational expression:

DVn-DHn>ADD/2

And, the surperficial astigmatism composition of the N1 of described first refractive surface is offset at described second refractive surface, give near with the number of degrees (Dn) according to prescription values described first and second refractive surfaces altogether,

According to this structure, particularly closely expanding the visual field in the horizontal direction by improving the sharing ratio of the horizontal gradation of eyeball side surface with portion, by the ratio of sharing that improves the vertical gradation of object side surface far and near sight line is moved easily simultaneously, can provide and wear the gradual change focal power eyeglass that the time spent rocks, distorts few.

(the tenth structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the both-sided aspherical type gradual change focal power eyeglass of the 9th structure,

Lateral surfaces focal power and the vertical surperficial focal power when being set at DHf, DVf with number of degrees measuring position F1 far away in respectively described first refractive surface, satisfy following relational expression:

DHf+DHn＜DVf+DVn, and DVn-DHn〉ADD/2 and

DHn-DHf<ADD/2

According to this structure, can be provided at the repressed gradual change focal power eyeglass that rocks or distort on portion and whole eyeglass face far away on the basis of the 9th effect structure.

(the 11 structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the both-sided aspherical type gradual change focal power eyeglass of the 9th structure or the tenth structure,

Described first refractive surface is to be boundary and left-right symmetric by a described meridian with number of degrees measuring position F1 far away, described second refractive surface is to be boundary and the left and right sides is asymmetric with the meridian with number of degrees measuring position F2 far away by this second refractive surface, and the nearly configuration of this second refractive surface with number of degrees measuring position N2 be only with predetermined distance inwardly near nasal side.

According to this structure, on the basis of the 9th structure or the tenth effect structure, particularly when closely moving sight line, can give two broader visuals field with portion with portion from far away.

(the 12 structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the both-sided aspherical type gradual change focal power eyeglass of the 9th～the 11 arbitrary structure,

Described first refractive surface is with by the described surfaces of revolution that meridian is a bus with number of degrees measuring position F1 far away, described second refractive surface is to be boundary and the left and right sides is asymmetric with the meridian with number of degrees measuring position F2 far away by this second refractive surface, and the nearly configuration of this second refractive surface with number of degrees measuring position N2 be only with predetermined distance inwardly near nasal side.

According to this structure, on the basis of the 9th～the 11 arbitrary effect structure, can make in object side surface and not have the distortion that becomes as the face that rocks reason.And when closely moving sight line, can give two broader visuals field with portion with portion from far away.

(the 13 structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the 9th～the 11 described both-sided aspherical type of arbitrary structure gradual change focal power eyeglass,

Not that just circle has the power variation of regulation by described horizontal direction section curve with number of degrees measuring position F1 far away in described first refractive surface, and the section curve that comprises the vertical direction section of optional position normal on this horizontal direction section curve, with described be identical by the meridian with number of degrees measuring position F1 far away.

According to this structure, on the basis of the 9th～the 11 arbitrary effect structure, can make the distortion of left and right sides relax the visual field of improveing sidepiece by adopting described structure.

(the 14 structure)

A kind of both-sided aspherical type gradual change focal power eyeglass is in the 9th～the 13 described both-sided aspherical type of arbitrary structure gradual change focal power eyeglass,

At the number of degrees (Df) and the adding number of degrees (ADD) used far away that described first and second refractive surfaces given altogether according to prescription values, and, on the basis of the structure that gives prism power (Pf) as required, to by in that wear can not quadrature and cause the astigmatism or the number of degrees error of generation with the sight line under the state and eyeglass face, and the carrying out aspheric surface more than or equal to a kind of project at least and proofread and correct of the image distortion that produces in peripheral visual field.

According to this structure, on the basis of the 9th～the 13 arbitrary effect structure, proofreading and correct by described aspheric surface to provide the gradual change focal power eyeglass that transmission astigmatism and transmission number of degrees error and the image distortion that produces in peripheral visual field have been suppressed.

(the 15 structure)

DVn-DHn>ADD/2

According to this structure, particularly closely expanding the visual field in the horizontal direction by improving the sharing ratio of the horizontal gradation of eyeball side surface with portion, by the ratio of sharing that improves the vertical gradation of object side surface far and near sight line is moved easily simultaneously, the method for designing that can obtain wearing the gradual change focal power eyeglass that the time spent rocks, distorts few can be provided.

(the 16 structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is in the method for designing of the both-sided aspherical type gradual change focal power eyeglass of the 15 structure,

DHf+DHn＜DVf+DVn, and DVn-DHn〉ADD/2 and

DHn-DHf<ADD/2

According to this structure, even can obtain rocking on portion and whole eyeglass face or the method for designing of the also repressed gradual change focal power eyeglass that distorts providing on the basis of the 15 effect structure far away.

(the 17 structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is in the method for designing of the both-sided aspherical type gradual change focal power eyeglass of the 15 structure or the 16 structure,

According to this structure, on the basis of the 15 structure or the 16 effect structure, particularly when closely moving sight line, can give two broader visuals field with portion with portion from far away.

(the 18 structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is that the both-sided aspherical type gradual change focal power eyeglass in the 15～the 17 arbitrary structure is in the method for designing,

According to this structure, on the basis of the 15～the 17 arbitrary effect structure, can make in object side surface and not have the distortion that becomes as the face that rocks reason.And when closely moving sight line, can give two broader visuals field with portion with portion from far away.

(the 19 structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is in the method for designing of the both-sided aspherical type gradual change focal power eyeglass of the 15～the 17 arbitrary structure,

According to this structure, on the basis of the 15～the 17 arbitrary effect structure, can make the distortion of left and right sides relax the visual field of improveing sidepiece by adopting described structure.

(the 20 structure)

A kind of method for designing of both-sided aspherical type gradual change focal power eyeglass is in the method for designing of the both-sided aspherical type gradual change focal power eyeglass of the 15～the 19 arbitrary structure,

At the number of degrees (Df) and the adding number of degrees (ADD) used far away that described first and second refractive surfaces given altogether according to prescription values, and, give prism power (Pf) as required, with such structure to wearing with can not quadrature under the state and cause the astigmatism or the number of degrees error of generation by sight line and eyeglass face, and the carrying out aspheric surface more than or equal to a kind of project at least and proofread and correct of the image distortion that in peripheral visual field, produces.

According to this structure, on the basis of the 15～the 19 arbitrary effect structure, proofreading and correct by described aspheric surface to provide the method for designing that can obtain gradual change focal power eyeglass that transmission astigmatism and transmission number of degrees error and the image distortion that produces in peripheral visual field have been suppressed.

(the 21 structure)

DVn-DHf>ADD/2

And, the F1 of described first refractive surface and the surperficial astigmatism composition among the N1 are offset at described second refractive surface, give the adding number of degrees (ADD) described first and second refractive surfaces altogether according to prescription values,

And, in passing through the longitudinal profile curve of F1, reach with 50% the position that gives that the longitudinal profile number of degrees change from F1 to the N1 equal height as the center, on being positioned at vertically ± two horizontal lines of 4mm and distance are two rectangle any positions that ordinate surrounded that are positioned at horizontal direction ± 15mm by vertical straight line of F1

The differential value of the surface longitudinal section number of degrees of described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value.

According to this structure, particularly at the high middle section of gradual change focal power eyeglass usage frequency by improving the face distortion that ratio reduces object side surface of sharing of the vertical gradation of object side surface, can suppress rocking or distorting of picture.

(the 22 structure)

DVn-DHf>ADD/2

The differential value of the surperficial astigmatism amount of described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value.

And any position in described rectangle,

The differential value of the average number of degrees in surface of described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value.

According to this structure, particularly at the high middle section of gradual change focal power eyeglass usage frequency by improving the face distortion that ratio reduces object side surface of sharing of the vertical gradation of object side surface, can suppress rocking or distorting of picture.And by the average number of degrees of surperficial astigmatism amount or surface are estimated easily the optical property of eyeglass as index.

(the 23 structure)

DVn-DHf>ADD/2

(the 24 structure)

DVn-DHf>ADD/2

And by in the longitudinal profile curve of F1 reach with 50% the position that gives that the longitudinal profile number of degrees change from F1 to the N1 equal height as the center, on being positioned at vertically ± two horizontal lines of 4mm and distance are two rectangle any positions that ordinate surrounded that are positioned at horizontal direction ± 15mm by vertical straight line of F1

And, any position in described rectangle,

According to this structure, particularly at the high middle section of gradual change focal power eyeglass usage frequency by improving the ratio of sharing of the vertical gradation of object side surface, and reduce the face distortion of object side surface, can suppress rocking or distorting of picture.And by the average number of degrees of surperficial astigmatism amount or surface are estimated easily the optical property of eyeglass as index.

According to the present invention, the gradation of gradual change focal power eyeglass is being cut apart on the basis that is assigned on the eyeglass vertical and horizontal, for the best object side of direction decision separately, the tow sides of eyeball side are shared ratio, and formation a slice both-sided aspherical type gradual change focal power eyeglass, can enjoy wide-field in the horizontal direction advantage by improving horizontal the sharing ratio of gradation of reverse side (eyeball side surface), and, can suppress the shortcoming that far and near in vertical direction eyeball rotation angle increases by improving vertical the sharing ratio of gradation in front (object side surface).

Gradual change focal power eyeglass can also be worn the effective field of view of the few broad scope of time spent distortion by reducing the difference of magnification of usefulness portion far away and near portion image.

The object side surface that also can be used as gradual change focal power eyeglass is to use " symmetrical semi-manufacture ", after accepting and order for goods only the eyeball side surface as the small hole acted on the asymmetric curved surface in the corresponding left and right sides the processing of eye when seeing nearby, can reduce process time and cost.

Description of drawings

Fig. 1 is the key diagram of the various surface light focal powers of each position of eyeglass lens surface;

Fig. 2 is the key diagram of eyeball, sight line and lens position relation;

Fig. 3-the 1st about the key diagram of prism multiplying power M γ, is about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion;

Fig. 3-the 2nd about the key diagram of prism multiplying power M γ, is about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion;

Fig. 3-the 3rd about the key diagram of prism multiplying power M γ, is about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion;

Fig. 4-the 1st about the key diagram of prism multiplying power M γ, is about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion;

Fig. 4-the 2nd about the key diagram of prism multiplying power M γ, is about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion;

Fig. 4-the 3rd about the key diagram of prism multiplying power M γ, is about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion;

Fig. 5-the 1st, the optical arrangement key diagram of gradual change focal power eyeglass is a front view (FV) of seeing gradual change focal power eyeglass from object side surface;

Fig. 5-the 2nd, the optical arrangement key diagram of gradual change focal power eyeglass is the elevation drawing of expression longitudinal profile;

Fig. 5-the 3rd, the optical arrangement key diagram of gradual change focal power eyeglass is the elevation drawing of expression horizontal section;

Fig. 6 is the different key diagram of definition of expression " the adding number of degrees ";

Fig. 7 is embodiment's 1,4,5,6 and " the surface light focal power " and " for the strict multiplying power result of calculation of specific line of sight direction " of the prior art A corresponding with each number of degrees, B, C is summarised in the figure that table 1-1 and table 1-2 represent;

Fig. 8 is embodiment's 2,7 and " the surface light focal power " and " for the strict multiplying power result of calculation of specific line of sight direction " of the prior art A corresponding with each number of degrees, B, C is summarised in the figure that table 2-1 and table 2-2 represent;

Fig. 9 is embodiment's 3 and " the surface light focal power " and " for the strict multiplying power result of calculation of specific line of sight direction " of the prior art A corresponding with its number of degrees, B, C is summarised in the figure that table 3-1 and table 3-2 represent;

Figure 10 is the figure that curve 1-1,1-2,2-1, the 2-2 of expression embodiment 1 and embodiment 2 surface light power profile are represented;

Figure 11 is curve 3-1, the figure that 3-2 represents of expression embodiment 3 surface light power profile;

Figure 12 is the figure that curve 4-1,4-2,5-1,5-2,6-1, the 6-2 of expression embodiment 4～embodiment 6 surface light power profile are represented;

Figure 13 is curve 7-1, the figure that 7-2 represents of expression embodiment 7 surface light power profile;

Figure 14 is the figure that curve A-1, A-2, B-1, B-2, C-1, the C-2 of expression prior art example A, B, C surface light power profile are represented;

Figure 15 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Msv represents in the multiplying power when main line of regard is seen;

Figure 16 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Msh represents in the multiplying power when main line of regard is seen;

Figure 17 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Mpv represents in the multiplying power when main line of regard is seen;

Figure 18 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Mph represents in the multiplying power when main line of regard is seen;

Figure 19 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-M γ v represents in the multiplying power when main line of regard is seen;

Figure 20 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-M γ h represents in the multiplying power when main line of regard is seen;

Figure 21 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-SMv represents in the multiplying power when main line of regard is seen;

Figure 22 distributes embodiment 1 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-SMh represents in the multiplying power when main line of regard is seen;

Figure 23 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Msv represents in the multiplying power when main line of regard is seen;

Figure 24 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Msh represents in the multiplying power when main line of regard is seen;

Figure 25 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Mpv represents in the multiplying power when main line of regard is seen;

Figure 26 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Mph represents in the multiplying power when main line of regard is seen;

Figure 27 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-M γ v represents in the multiplying power when main line of regard is seen;

Figure 28 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-M γ h represents in the multiplying power when main line of regard is seen;

Figure 29 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-SMv represents in the multiplying power when main line of regard is seen;

Figure 30 distributes embodiment 2 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-SMh represents in the multiplying power when main line of regard is seen;

Figure 31 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Msv represents in the multiplying power when main line of regard is seen;

Figure 32 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Msh represents in the multiplying power when main line of regard is seen;

Figure 33 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Mpv represents in the multiplying power when main line of regard is seen;

Figure 34 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Mph represents in the multiplying power when main line of regard is seen;

Figure 35 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-M γ v represents in the multiplying power when main line of regard is seen;

Figure 36 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-M γ h represents in the multiplying power when main line of regard is seen;

Figure 37 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-SMv represents in the multiplying power when main line of regard is seen;

Figure 38 distributes embodiment 3 and three kind conventional example A, Bs corresponding with its number of degrees, C eyeglass to carry out the figure that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-SMh represents in the multiplying power when main line of regard is seen;

Figure 39 is the figure of astigmatism distribution under the expression embodiment 1 eyeglass transmissive state;

Figure 40 is the figure that the average number of degrees distribute under the expression embodiment 1 eyeglass transmissive state;

Figure 41 is the figure of expression embodiment 1 convex lens surface side refractive surface astigmatism distribution;

Figure 42 is the figure that the average number of degrees of expression embodiment 1 convex lens surface side refractive surface distribute;

Figure 43 is the figure that expression embodiment 1 convex lens surface side refractive surface horizontal stroke (level) U Degree U distributes;

Figure 44 is the figure that vertical (vertically) U Degree U of expression embodiment 1 convex lens surface side refractive surface distributes;

Figure 45 is the figure of expression embodiment 1 eyeglass concave side refractive surface astigmatism distribution;

Figure 46 is the figure that the average number of degrees of expression embodiment 1 eyeglass concave side refractive surface distribute;

Figure 47 is the figure that expression embodiment 1 eyeglass concave side refractive surface horizontal stroke (level) U Degree U distributes;

Figure 48 is the figure that vertical (vertically) U Degree U of expression embodiment 1 eyeglass concave side refractive surface distributes;

Figure 49 is the figure of expression prior art convex lens surface side refractive surface astigmatism distribution;

Figure 50 is the figure that the average number of degrees of expression prior art convex lens surface side refractive surface distribute;

Figure 51 is the figure that expression prior art convex lens surface side refractive surface horizontal stroke (level) U Degree U distributes;

Figure 52 is the figure that vertical (vertically) U Degree U of expression prior art convex lens surface side refractive surface distributes;

Figure 53 is the figure that vertical (vertically) U Degree U of the variation 1 eyeglass object side surface of expression embodiment distributes;

Figure 54 is the figure of surperficial astigmatism distribution of the variation 1 eyeglass object side surface of expression embodiment;

Figure 55 is the figure that the average number of degrees in surface of the variation 1 eyeglass object side surface of expression embodiment distribute;

Figure 56 is the figure that vertical (vertically) U Degree U of the variation 1 eyeglass object side surface of expression embodiment changes;

Figure 57 is the figure of the general scanning plane example of variation 2 eyeglasses of expression embodiment;

Figure 58 sees the meridianal figure that represents with solid line Figure 57 from the eyeglass side;

Figure 59 is the figure that sees the sweep trace that is represented by dotted lines Figure 57 from the eyeglass top;

Figure 60 is first variation of the sweep trace seen from the eyeglass shown in Figure 59 top;

Figure 61 is second variation of the sweep trace seen from the eyeglass shown in Figure 59 top;

Figure 62 is the 3rd variation of the sweep trace seen from the eyeglass shown in Figure 59 top;

Figure 63 is the figure of surperficial astigmatism distribution of the variation 3 eyeglass object side surface of expression embodiment;

Figure 64 is the figure that the average number of degrees in surface of the variation 3 eyeglass object side surface of expression embodiment distribute;

Figure 65 is the figure of surperficial astigmatism distribution of the variation 3 eyeglass eyeball side surfaces of expression embodiment;

Figure 66 is the figure that the average number of degrees in surface of the variation 3 eyeglass eyeball side surfaces of expression embodiment distribute.

Embodiment

Following one side illustrates embodiments of the invention on one side with reference to accompanying drawing.This explanation middle front part branch is explanation present inventors' the process that gets across, and the rear section is the explanation of carrying out according to this result who gets across and to both-sided aspherical type gradual change focal power eyeglass of the present invention.

At this, Fig. 1 is the key diagram of the various surface light focal powers of each position of eyeglass lens surface, Fig. 2 is the key diagram of eyeball and sight line and lens position relation, Fig. 3-1, Fig. 3-2, Fig. 3-3 and Fig. 4-1, Fig. 4-2, Fig. 4-the 3rd is about the key diagram of prism multiplying power M γ, be about the bottom of positive eyeglass with the different and main use eyeglass of negative eyeglass, the different key diagram of multiplying power when promptly closely seeing with portion, Fig. 5-the 1st, the optical arrangement key diagram of gradual change focal power eyeglass, it is the front view (FV) of seeing gradual change focal power eyeglass from object side surface, Fig. 5-the 2nd, the optical arrangement key diagram of gradual change focal power eyeglass, it is the elevation drawing of expression longitudinal profile, Fig. 5-the 3rd, the optical arrangement key diagram of gradual change focal power eyeglass, be the elevation drawing of expression horizontal section, Fig. 6 is the different key diagram of definition of expression " the adding number of degrees ".Among these figure, symbol F represents far to use number of degrees measuring position, and N represents closely to use number of degrees measuring position, and Q represents prism number of degrees measuring position.And other symbolic representation of being remembered among Fig. 1 etc. is:

DVf: the surface light focal power at the F place of the longitudinal profile curve by F

DVn: the surface light focal power at the N place of the longitudinal profile curve by N

DHf: the surface light focal power at the F place of the horizontal section curve by F

DHn: the surface light focal power at the N place of the horizontal section curve by N

And the refractive surface of figure is the i.e. then all additional tail tag 1 of symbol during first refractive surface of object side surface, and refractive surface is an eyeball side surface promptly during second refractive surface, the additional tail tag 2 of then all symbols and discerning.

Symbol F1 and F2 represent the number of degrees measuring position of using far away of object side surface and eyeball side surface, and similarly N1 and N2 represent the nearly number of degrees measuring position of using of object side surface and eyeball side surface.And E be eyeball, C be rotary middle point, the S of eyeball be with C be the center be respectively with number of degrees measuring position with closely use the sight line of number of degrees measuring position by far away with reference to sphere, Lf and Ln.M is the curve of the called line of regard of deciding that two sight lines soon the time are passed through to the below from positive top.F1, N1, F2, N2, N3 represent is position with the different and different lens inspection instrument peristome of the definition of " the adding number of degrees ".

[process gets across]

Present inventors (a) problem of above-mentioned DESCRIPTION OF THE PRIOR ART " is made parameter corresponding to closely use portion " and (d) problem " consideration to object distance from " improved corresponding to closely obtaining as follows with portion's dynameter formula.Promptly Mp is set at the focal power factor, when Ms is set at form factor, as the following expression of multiplying power SM.

SM＝Mp×Ms (1′)

At this, to the object space focal power of seeing thing (with the m of unit represent to object distance from inverse) be set at Px, is eyeglass L with the distance setting of portion from the face of eyeball one side to eyeball closely, nearly focal power with portion (closely using portion's inboard summit focal power) is set at Po, is eyeglass t with the thickness setting of portion closely, the refractive index of eyeglass is set at n, and the baseline (focal power) that eyeglass is closely used the face of portion's object side is when being set at Pb, and then following relation is set up.

Mp＝(1-(L+t)Px)/(1-L×Po) (2′)

Ms＝1/(1-t×(Px+Pb)/n) (3′)

In these formulas, if make each parameter with far away corresponding and with portion, then consistent with the formula of described prior art 1 to representing to object distance substitution in the Px of focal power value 0 corresponding with infinity.Can think promptly that used formula is in prior art 1 " infinity to object distance from, promptly see special-purpose formula at a distance." be identical at the formula of this (1 ') and described prior art 1, in general see nearby to object distance from being about 0.3m～0.4m, so its Px reciprocal is about-2.5～-3.0 value.Therefore, the value of molecule increases and the value increase of Mp in (2 '), and the value of denominator increases and the value minimizing of Ms in (3 ').Recognize that promptly the influence of form factor Ms when seeing nearby lacks than the result of calculation of prior art 1.For example at Pb=-Px, promptly the baseline of the face of eyeglass object side (focal power) is+Ms=1 during about 2.5～+ 3.0 value, and it doesn't matter fully to recognize the multiplying power of form factor and picture when seeing nearby.

As mentioned above, can obtain make parameter corresponding near with portion and also considered " to object distance from " the dynameter formula.But, must also further consider the problem " angle of sight line and eyeglass face " of described prior art 1 (b) in order to calculate the actual multiplying power of seeing nearby.It is important in this that " angle of sight line and eyeglass face " has directivity.And consider " angle of sight line and eyeglass face " be exactly consider simultaneously (c) problem of described prior art 1 " as multiplying power " directivity.

If with first calculating formula in these viewpoint revaluation above-mentioned (1 ')～(3 '), then the calculating factor that is influenced as " angle of sight line and eyeglass face " just has baseline (focal power) Pb of the face of nearly usefulness inboard summit focal power Po of portion and nearly usefulness portion object side.At this, if sight line is set at α with the nearly angle that optical axis became with the portion zone when seeing nearby, sight line is set at β with the nearly angle that normal became with portion's object side surface when seeing nearby, and the Martin approximate expression known of use, then becomes

Nearly usefulness portion longitudinal medial summit focal power: Pov=Po * (1+Sin ²α * 4/3)

Closely with portion's horizontal inboard summit focal power: Poh=Po * (1+Sin ²α * 1/3)

The longitudinal profile focal power of nearly usefulness portion object side surface: Pbv=Pb * (1+Sin ²β * 4/3)

The transverse section focal power of nearly usefulness portion object side surface: Pbh=Pb * (1+Sin ²β * 1/3)

Like this, as long as angle α or β and Po or Pb are not zero, focal power, focal power factor and form factor etc. are exactly different in length and breadth values, and consequently the generation of the multiplying power of vertical and horizontal is poor.

Though used approximate expression at this for simple declaration " along with the direction of sight line focal power change ", be preferably in the actual optical design ray tracing and calculate the value of obtaining them by strictness.The infinite example of these computing method is described.

At first use the light path of Snell law calculating, calculate L, t and distance from the object side refractive surface to object point along sight line.Then along this light path by using first fundamental form, second fundamental form and the Weingarten formula etc. in the differential geometry, the focal power that influences of dioptric of just having calculated consideration on eyeglass object side refractive surface and eyeball side refractive surface light path.These formulas and computing method are exactly known a long time ago, and are for example just on the books in known document " differential geometry " (vow wild Itou Kentaro work (strain) towards storehouse bookstore distribution first edition 1949) waits, so the explanation omission.

Calculate by carrying out strict ray tracing like this, L, the Po of (a)～(d) problem, four calculating of t, Pb factor also are considered in the described prior art 1, the lower position far away apart from center of lens closely just much less with portion, the strict multiplying power of all direction of visual lines is calculated also is possible.

Like this for described project:

Nearly usefulness portion longitudinal medial summit focal power: Pov

Closely with portion's horizontal inboard summit focal power: Poh

The longitudinal profile focal power of nearly usefulness portion object side surface: Pbv

The transverse section focal power of nearly usefulness portion object side surface: Pbh

Use the Martin approximate expression just can obtain with higher precision.

Like this, can easily understand that according to " focal power is changing along with the direction of sight line " even in the multiplying power of described picture is calculated, also can tackle the difference of all direction of visual lines.At this, Mp is set at the focal power factor, Ms is set at form factor, for vertically additional tail tag v, when representing for laterally additional tail tag h, then can following rewriting for the multiplying power SM of picture above-mentioned (1 ')～(3 ') formula.

SMv＝Mpv×Msv (1v′)

SMh＝Mph×Msh (1h′)

Mpv＝(1-(L+t)Px)/(1-L×pov) (2v′)

Mph＝(1-(L+t)Px)/(1-L×poh) (2h′)

Msv＝1/(1-t×(Px+Pbv)/n) (3v′)

Msh＝1/(1-t×(Px+Pbh)/n) (3h′)

As above just can tackle described prior art 1 from problem (a) to (d).

At last, calculating the actual problem (e) " influence of prismatic action " of the described prior art 1 of narration on the basis of multiplying power when seeing nearby.

Though prism itself does not have the such focal power of eyeglass, with light injecting angle or penetrating the difference of angle and the multiplying power M γ of prism changes to prism.In this left side, consider the angular magnification γ of light when dielectric surface is refracted that from vacuum, in the medium of refractive index n, injects as Fig. 3-1 and Fig. 4-1.At this moment inject the angle be set at i, when the refraction angle is set at r, the Snell law by knowing is

n＝Sin?i/Sin?r

And the angular magnification γ of refraction represents with following formula.

γ＝Cos?i/Cos?r。

At this, because n 〉=1, thus i 〉=r usually, γ≤1.The maximal value of this γ be 1 o'clock be i=r=0, promptly be situation about vertically injecting.When refraction angle r was n=1/Sin r, γ was theoretic minimum value

γ＝0。At this moment

The critical angle of total reflection when i=pi/2, r equal light and penetrate from medium.

On the other hand, as the right side of Fig. 3-1 and Fig. 4-1, the angular magnification γ ' of light when the medium of refractive index n penetrates to vacuum is with above-mentioned fully opposite.Promptly light is refracted and the angle of injecting when penetrating to vacuum is set at i ', the refraction angle is set at r ' time from medium inside at dielectric surface,, is by the Snell law

1/n＝Sin?i′/Sin?r′

Angular magnification γ represents with following formula.

γ′＝Cos?i′/Cos?r′

Because n 〉=1, thus r ' 〉=i ' usually, γ ' 〉=1.At this, the minimum value of γ ' be 1 o'clock be i '=r '=0, promptly vertically inject situation.Injecting angle i ' is n=1/Sin i ' time, and γ ' is theoretic maximal value

γ′＝∞。At this moment

The critical angle of total reflection when r '=pi/2, i ' equal light and penetrate from medium.

As Fig. 3-3 and Fig. 4-3, consider to light that the object side surface of an eyeglass is injected inner by eyeglass and penetrate and arrive from the eyeball side surface eyeball situation (later for the simplification that illustrates the refractive index of air thought simply with vacuum identical be to be similar to 1).When the refractive index that is set at eyeglass respectively is n, the angle of injecting from light to object side surface that inject is i, the refraction angle is r, from the inner angle of injecting that arrives eyeball side surface light of eyeglass is i ', irradiant refraction angle is r ' time, then the angular magnification M γ on two surfaces of transmission eyeglass represents with amassing of above-mentioned two kinds of angular magnifications, becomes

Mγ＝γ×γ′＝(Cos?i×Cos?i′)/(Cos?r×Cos?r′)

The focal power of this and lens surface has no relations, but is understood as the multiplying power of prism.

At this, as Fig. 3-1 and Fig. 4-1, consider i=r ', r=i ' time, then be

Mγ＝γ×γ′＝1

The multiplying power of the picture of seeing by prism does not change.But as Fig. 3-2 at light vertically when the object side surface of eyeglass is injected, then be

Mγ＝γ′＝Cos?i′/Cos?r′≥1

On the contrary, as Fig. 4-2 at light when the eyeball side surface of eyeglass vertically penetrates, then be

Mγ＝γ＝Cos?i/Cos?r≤1

At this, importantly the multiplying power M γ of these prisms has directivity.Even consider the distribution of prism in the gradual change focal power eyeglass, then difference is few near the prism of seeing the distant place of eyeglass central authorities substantially with the difference of the number of degrees or prescription prism values certainly, and sees that vertical prism nearby is big below being positioned at eyeglass.Therefore we can say that the multiplying power M γ of prism is especially for seeing that vertical influence nearby is big.

Be not only gradual change focal power eyeglass, eyeglass generally all is that object side surface is protruding and meniscus shape that the eyeball side surface is recessed, if take all factors into consideration sight line when seeing nearby and be downward then shown in Fig. 3-3, have near with portion be positive light coke gradual change focal power eyeglass see nearby the time, we can say than Fig. 3-1 of M γ=1 and can be described as M γ at least more near the shape of Fig. 3-2 of M γ 〉=11.Similarly, shown in Fig. 4-3, have near with portion be negative power gradual change focal power eyeglass see nearby the time, we can say than Fig. 4-1 of M γ=1 to can be described as M γ＜1 at least more near the shape of Fig. 4-2 of M γ≤1.Therefore, have near with portion be positive light coke gradual change focal power eyeglass see nearby the time be M γ 1, have near with portion be negative power gradual change focal power eyeglass see nearby the time be M γ＜1.

As previously mentioned, the eyeglass multiplying power SM in the consequently described prior art 1 is only grasped as the long-pending of focal power factor Mp and form factor Ms, relatively more has been multiplied by the multiplying power M γ of prism in the present invention and expects correct eyeglass multiplying power.

The contrast of the multiplying power M γ of this prism and Mp or Ms is called " prism factor ", if for vertically additional tail tag v, when representing for laterally additional tail tag h, then can following rewriting for above-mentioned (1v ') and (1h ') formula of the multiplying power (SM) of picture.

SMv＝Mpv×Msv×Mγv (1v″)

SMh＝Mph×Msh×Mγh (1h″)

M γ v here or M γ h can obtain in the ray tracing computation process of described strictness.Like this, the problem with regard to exerting an influence by prismatic action in the multiplying power calculating that can solve described glasses.

The surface light focal power of object side surface " transitional surface " is far to use portion of portion＜closely use in the common convex surface gradual change focal power eyeglass.Relatively in the gradual change focal power eyeglass of described prior art 1, " transitional surface " surface light focal power of object side surface is set at far away with portion of portion=closely use, ratio by the far and near form factor of such change to be reducing the difference of magnification of far and near picture, and to improve gradual change focal power eyeglass picture distortion or rock.

But in the investigation of the present application, recognize: the far and near surface light focal power by reducing object side surface " transitional surface " poor, the advantage that the difference of magnification that reduces far and near picture is in the horizontal arranged, but there are several problems in this advantage on the difference for vertical minimizing surface light focal power.

First problem is the influence of vertical prism factor M γ v.

As previously mentioned, vertically prism factor M γ v is M γ v＜1 having under the situation of negative power, in that to have under the situation of positive light coke be M γ v〉1, its tendency is reinforced by reducing differing from of vertical surperficial focal power, closely be with the number of degrees of portion under positive and negative any situation all the multiplying power M γ v=1 from bore hole leave.But not having this influence for horizontal prism factor M γ h, is that M γ h=1 is constant.Consequently particularly from nearly usefulness portion to below the multiplying power of picture produce in length and breadth poor, produce regarding foursquare object as and when the positive number of degrees, regard lengthwise as, when the negative number of degrees, regard such unfavorable condition of growing crosswise as.

Second problem be only particularly closely with portion vertically have positive light coke the time problem that produces.Be by reduce differing from of vertical surperficial focal power when seeing nearby the angle of sight line and eyeglass face tilt more, the described factor of prism longitudinally M γ v increases, increase repeat function by vertical prism factor M γ v and make multiplying power SMv increase longitudinally, the unfavorable condition that generation increases the difference of magnification of far and near picture on the contrary with first problem.

Promptly recognize the poor of the far and near surface light focal power that reduces the object side surface transitional surface, for laterally be advantage and for vertically be on the contrary change bad.Therefore, in the convex surface gradual change focal power eyeglass of existing type, the transitional surface that is positioned at object side surface is divided into vertical and horizontal, can be by only avoiding above-mentioned problem for the difference of the far and near surface light focal power of horizontal minimizing.

These situations are described below, so also be same fully in general " visual field expansion " of reverse side gradual change (or the concave surface gradual change) advantage of eyeglass eyeball side.

Generally all know owing to the side surface part at " transitional surface " has astigmatism, so there is boundary in the good visual field of horizontal direction.So as long as " transitional surface " be configured in make on the eyeball side surface " transitional surface " itself near eye, just produce the advantage that the good visual field is expanded in the horizontal direction.But be that far and near area of visual field becomes result far away and is in vertical direction on the contrary, be created in eyeball from seeing at a distance the unfavorable condition that increases to the labour who sees when rotating nearby.Be the advantage that reverse side gradual change (or concave surface gradual change) has horizontal direction to have a wide sphere of vision than existing positive gradual change (or convex surface gradual change), but the shortcoming that the eyeball rotation angle increases when having in vertical direction from seeing at a distance to seeing nearby.

But in the present invention as previously mentioned, owing to possess the DHf+DHn of satisfying＜DVf+DVn, and DHn＜DVn, or DVn-DVf〉ADD/2, and the gradual change focal power surface of the such relational expression of DHn-DHf＜ADD/2, so the characteristics with existing positive gradual change (or convex surface gradual change) characteristics comparison reverse side gradual changes (or concave surface gradual change) are strong in the horizontal direction, and are that existing positive gradual change (or convex surface gradual change) characteristics are stronger than the characteristics of its reverse side gradual change (or concave surface gradual change) in vertical direction.Therefore according to the present invention, when having a wide sphere of vision advantage, the enjoyment horizontal direction can be suppressed at the shortcoming of the eyeball rotation angle increase of vertical direction distance.

Particularly as described later shown in the embodiment 1, so long as DVn-DVf=ADD, and DHn-DHf=0, then equate with existing positive gradual change (or convex surface gradual change) in vertical direction, and equate with reverse side gradual change (or concave surface gradual change) in the horizontal direction.Therefore, the so very good result who obtains advantage on the horizontal direction on avoiding vertical direction in the shortcoming is arranged in this case.

In addition, as mentioned above, reduce the difference of magnification of usefulness portion far away and near portion image as previously mentioned, in the distortion that improves picture or to rock also be effective, can be described as effect of the present invention.

As mentioned above, the characteristics of the present application maximum are: share ratio at the best tow sides of the gradation of gradual change focal power eyeglass being shared on the basis on the eyeglass vertical and horizontal for separately of direction decision, constitute a slice both-sided aspherical type gradual change focal power eyeglass like this.At this, the gradation longitudinally of eyeglass object side surface is shared ratio and the horizontal gradation of eyeball side surface and is shared ratio and can set to surpass 50% form at least.For example also can all give the object side surface of eyeglass gradation longitudinally, all give the eyeball side surface of eyeglass horizontal gradation, set like this and share ratio.

The tow sides of eyeglass only are single faces all when adopting this structure, do not have the common function as transitional surface, can not the specific adding number of degrees as transitional surface.To synthesize astigmatic face etc. according to prescription for its face.

To this, although described various prior art has difference sharing of the number of degrees of adding on the ratio, but all be on the pros and cons of eyeglass, at first " value " of the necessary adding number of degrees to be distributed in respectively on the tow sides, given to add separately the synthetic face that constitutes astigmatic face etc. on the basis of substantive transitional surface of the number of degrees as required in imagination as transitional surface.Promptly on the object side surface of eyeglass and eyeball side surface, gradation is not separated be set in vertically, structure transversely.

As mentioned above, the eyeglass of the present application is the both-sided aspherical type gradual change focal power eyeglass with brand new that the aspheric surface with different gradations of two directions is in length and breadth used on the two sides.

[both-sided aspherical type gradual change focal power eyeglass of the present invention]

The both-sided aspherical type gradual change focal power eyeglass of the embodiment of the invention below is described.

(order of lens design)

The summary order of both-sided aspherical type gradual change focal power lens optical method for designing can be taked various orders, for example can use following method.

[1] is used for the setting of the input information of lens design.

[2] design as the eyeglass two sides of protruding gradual change focal power eyeglass.

[3] proofread and correct to the conversion of convex shape of the present invention and eyeglass reverse side thereupon.

[4] transmission design and follow the eyeglass reverse side of corresponding listing's law design etc. to proofread and correct.

Followingly each is resolved into more detailed step in proper order describe in detail.

([1] is used for the setting of the input information of lens design)

In lens design, the input information that is used for definition regulation gradual change focal power eyeglass is set.At this, input information roughly is divided into following project intrinsic information and this two class of wearer's intrinsic information describes.(factor beyond the optical design omits)

[1]-1: the project intrinsic information

Be data intrinsic in the eyeglass project.Be the data about eyeglass physical characteristics form factor of the refractive index Ne of raw material, the thick CTmin in minimum center, minimum edge edge thickness ETmin, transitional surface design parameter etc.

[1]-2: wearer's intrinsic information

Be far use the number of degrees (spherical degree S, astigmatism degree C, astigmatism axle AX, prism number of degrees P, prism substrate direction PAX etc.), add number of degrees ADD, picture frame type data (preferably three-dimensional shape data), picture frame are worn with distance between data (top rake, angle of oscillation etc.), summit, layout data (far with PD, closely use CD, position of eye point etc.), in addition, be about the data of relevant eyeball etc. prescription, wear the data of the factor of the state of using, eyeglass, picture frame.

And by the gradual change belt length of wearer's appointment, add number of degrees measuring method and closely be classified into wearer's intrinsic information one side with the transitional surface design parameter of the inner amount of portion etc.

([2] are as the eyeglass two sides design of protruding gradual change focal power eyeglass)

In the initial stage, be divided into convex surface as existing type protruding gradual change focal power eyeglass and concave surface designs.

[2]-1 convex shape (protruding transitional surface) design

For adding number of degrees ADD or the gradual change belt length of realizing giving (belt length), design the face shape of the existing protruding transitional surface of type according to the transitional surface design parameter of input information as input information.The design of this step can utilize existing various lens design method.

As the concrete example of this lens design method, the method for at first setting " principal meridian " that be equivalent to the eyeglass spine when constituting the eyeglass face is at first for example arranged.(nearby) uses two to be equivalent to sight line and eyeglass deliver personally " the main line of regard " of line soon the time from positive top (at a distance) to the below should " principal meridian " preferably finally to become the glasses wearer.But corresponding to the corresponding regional nearby inner grade of small hole effect of eye also not necessarily needs the inner configuration of this " main line of regard " as described later when seeing nearby.Therefore, " the main line of regard " at this is to define as the meridian (principal meridian) longitudinally about being divided into by eyeglass central authorities and the eyeglass face.And because eyeglass has tow sides, so should " principal meridian " also have positive and negative two.Should " principal meridian " be to be considered as linearity when vertically seeing thing for the eyeglass face, but be under the situation of curved surface at the eyeglass face, generally in solid space, become curve.

Then the information such as length of the adding number of degrees of regulation and gradation zone are set along being somebody's turn to do " principal meridian " suitable optical power profile as the basis.This optical power profile is considered the influence of the thickness of eyeglass or the angle of sight line and refractive surface etc., also can be divided into tow sides sets, because the design of this step is the method for designing of the face shape of the protruding gradual change of existing form adopted, so gradation is in whole object side surface promptly on first refractive surface.

Therefore, for example the surface light focal power of front lens surface (object side surface promptly first refractive surface) be set at D1, when the surface light focal power of eyeglass reverse side (the eyeball side surface i.e. second refractive surface) is set at D2, if when the transmitted light focal power that obtains is set at D, then usually can be similar to and obtains as D ≈ D1-D2.But it is that object side surface is that protruding, eyeball side surface is recessed convex-concave shape that the combination of D1 and D2 is preferably in this eyeglass.

At this, D2 be set on the occasion of.Usually the reverse side of eyeglass is a concave surface, be the value of bearing as the surface light focal power, but this instructions deducts D2 and calculates transmitted light focal power D for the simplification that illustrates is to be set at positive value from D1.

The relational expression of this surface light focal power and surface configuration generally is to be defined by following formula.

Dn＝(N-1)/R

Diopter), N is that refractive index, the R of Raw materials for lenses is radius-of-curvature (unit: m) wherein, Dn is the surface light focal power (unit: of n face.Therefore, the method that the distribution of surface light focal power is converted into curvature distribution is the distortion of above-mentioned relation formula and use

1/R＝Dn/(N-1)

Distribution by the obtaining curvature then geometry shape of " principal meridian " just is determined quickly, and " principal meridian " that be equivalent to vertebrae when constituting the eyeglass face is set.

What then need is the design that is equivalent to " the section curve group of horizontal direction " of rib when constituting the eyeglass face.It is the right angle that the angle that these " section curve groups of horizontal direction " and " principal meridian " are handed over not necessarily needs, but simple in order to illustrate, is set on " principal meridian " at this each " section curve of horizontal direction " to meet at right angle.And with the intersection point of " principal meridian " on, " the lateral surfaces focal power " of " the section curve group of horizontal direction " also not necessarily need and equate along " vertical surperficial focal power " of " principal meridian ", but present embodiment is set at the vertical and horizontal surface light focal power on these intersection points and equates.

It is the simple circular curve that has the surface light focal power on these intersection points that all " section curves of horizontal direction " also can be set for, also can be various prior art applied in any combination.As about prior art, the technology of special public clear 49-3595 is for example arranged along the surface light power profile of " section curve of horizontal direction ".Its feature is: setting one near the central authorities of eyeglass roughly is round-shaped " section curve of horizontal direction ", the section curve that is positioned at its top has the surface light focal power that increases from central authorities to the side, and the section curve that is positioned at below it has the surface light focal power that reduces from central authorities to the side.Like this, " principal meridian " and on it countless arranged side by side " the section curve groups of horizontal direction " just just like vertebrae and rib constitute the eyeglass face like that, refractive surface is determined.

[2]-2 concave (sphere or astigmatic face) design

For the concave that designs with the number of degrees far away that realizes giving as input information.Far away with the number of degrees in if there is astigmatism degree then just to become astigmatic face, as if just not becoming sphere.At this moment also design simultaneously is suitable for the face pitch angle each other of the thick CT in center and the convex surface and the concave surface of the number of degrees, and determines the shape as eyeglass.The design of this step also can utilize existing various known designing techniques.

(proofread and correct to the conversion of convex shape of the present invention and eyeglass reverse side thereupon [3])

Far away with the number of degrees with add number of degrees ADD etc. according to what give as input information, from the protruding gradual change focal power eyeglass of existing type to as lens shape conversion of the present invention.

[3]-1 convex shape (the present invention) design

According to give as input information far with the number of degrees or add number of degrees ADD etc., change to convex shape of the present invention from the protruding transitional surface of existing type.At this moment, on the basis of the vertical and horizontal that are divided into eyeglass in advance, set desirable tow sides and share ratio for all directions.Promptly for the lens surface of the described first protruding gradual change (object side surface i.e. first refractive surface), far the lateral surfaces focal power with number of degrees measuring position F1 is set at DHf, vertical surperficial focal power is set at DVf, nearly lateral surfaces focal power with number of degrees measuring position N1 is set at DHn, when vertical surperficial focal power is set at DVn, is designed to be satisfied

DHf+DHn＜DVf+DVn, and the relational expression of DHn＜DVn, and satisfy

DVn-DVf〉ADD/2, and the focal power surface of DHn-DHf＜ADD/2 relational expression.

Present embodiment is set as satisfying both.

At this moment, preferably under the immovable situation of average surface focal power of convex surface integral body, be transformed into convex shape of the present invention.Be exactly the population mean of for example considering to keep usefulness far away portion and the focal power of surface light in length and breadth of nearly usefulness portion specifically.But in this eyeglass, be that protruding, eyeball side surface is in the scope of recessed convex-concave shape preferably keeping object side surface.

[3]-2 concave (the present invention) design

The deflection of protruding transitional surface when convex shape of the present invention is changed from existing type in above-mentioned [3]-1 is added to the concave of [2]-2 design.Promptly, also only be added in reverse side (eyeball side surface, i.e. second a refractive surface) side of eyeglass with identical amount added lens surface (object side surface, i.e. first refractive surface) deflection in the processing of [3]-1.This distortion is similar with the what is called " bending " that makes eyeglass bending itself, but does not relate to the homogeneous deformation of whole of eyeglass, but makes the surface that becomes the described relational expression in satisfied [3]-1.

The situation of finishing invention in this step according to the prescription or the specification of eyeglass also has.But preferably described correction is handled as the correction of first-order approximation, and preferably added the reverse side aligning step of [4] of top and bottom.

([4] transmission design and follow the eyeglass reverse side of the corresponding design of listing's law etc. to proofread and correct)

In order to realize distributing to the optical property of eyeglass under wearing with the situation of eyeglass in that the wearer is actual, preferably for adding further in the eyeglass of the present invention that in [3], obtains that reverse side proofreaies and correct as input information.

[4]-1 concave (the present invention) design of transmission design

Transmission design be the wearer is actual wear with the situation of eyeglass under in order to obtain the method for designing of original optical property, mainly be to be used for the generation astigmatism of can not quadrature by sight line and eyeglass face and causing and number of degrees variation removed or to reduce and add the method for designing of " corrective action ".

Be exactly as previously mentioned specifically, calculate, grasp and be the difference of the original optical property of purpose, and implement to eliminate the correction (arc correction) of its difference by strict ray tracing according to direction of visual lines.By carrying out making the difference minimization repeatedly, can obtain best separating.

In general, it is very difficult, in fact how impossible the lens shape with objective optics performance directly being calculated.This is because " lens shape with any setting optical property " physical presence has unlimited cause.But obtain in contrast, " optical property of setting lens shape arbitrarily " then than being easier to.Therefore, calculate the face of first approximation at first with arbitrary method temporarily, and come described design parameter is carried out inching according to the optical property evaluation result of the lens shape that uses this approximate face, change lens shape then one by one and turn back to evaluation procedure, revaluing repeatedly and adjust just can be close to the objective optics performance.This gimmick is to be called " optimization " and an example of the gimmick widely known.

[4]-2 be used for concave (the present invention) design of the corresponding design of listing's law

The stereo rotating of eyeball motion was to follow the rule that is called " listing's law " when we looked around on every side, even but the astigmatism axle eyeglass is incorporated on " the astigmatism axle of the eyeball that the front is seen " when in the prescription number of degrees of eyeglass astigmatism degree being arranged, in that also both sides' astigmatism axle is inconsistent sometimes when periphery is seen.Like this, can be being used for when periphery is seen inconsistent with the astigmatic direction of principal axis of eye and the generation astigmatism or the number of degrees that cause change the curved surface with astigmatism correction effect one side surface that " corrective action " of removing or reducing is added in eyeglass of the present invention by eyeglass.

Be exactly for " corrective action " is added on the curved surface of eyeglass of the present invention specifically, similarly calculate with " optimization " method that [4]-1 is used by strict ray tracing according to direction of visual lines, grasp and difference, and implement to eliminate the correction of its difference as the original optical property of purpose.Make the difference minimization by carrying out this operation repeatedly, can obtain best separating.

[4]-3 be used for concave (the present invention) design of the closely inner corresponding design of usefulness portion

As above-mentioned inner method, present embodiment shown in the optical arrangement key diagram of Fig. 1 and Fig. 5-1 gradual change focal power eyeglass, employing be make principal meridian (M) from far away with number of degrees measuring positions (F) to the design techniques of nearly usefulness number of degrees measuring positions (N) to the nasal side displacement.This design techniques is the method for having considered the small hole, according to the small hole effect is set to the addendum modification of nasal side principal meridian according to following formula.

Addendum modification (H) ≈ A * D+B

At this, H is to be that additional optical focal power (add the number of degrees ADD), A are that proportionality constant, B are constant (also comprising 0) for the addendum modification to nasal side with number of degrees measuring position (F) far away, D on the principal meridian (M).

With the prescription of eyeglass or add the difference of the number of degrees and difference can be set arbitrarily, for example can adopt following method in the value of this concrete addendum modification.

Among Fig. 5-1, as initial point, be under the situation of coordinate system of V coordinate axis (vertical direction) in the right-hand H of the being coordinate axis of imagination (horizontal direction addendum modification), below, near H coordinate, the V coordinate with number of degrees measuring position (N) is set at H respectively described some F _MAX, V _MAX, it is added the number of degrees is set at D _MAXLike this, for example particularly adding number of degrees D _MAXBe set at 3.00, addendum modification is set at 2.5mm (that at this moment adopt is B=0), V is set at 12mm, just can reach to the addendum modification of nearly principal meridian (M) each point with number of degrees measuring position (N) with number of degrees measuring position (F) by setting for the coordinate of each V from far away.(for example with reference to special public clear 62-47284 number), principal meridian (main line of regard) configuration to the small hole effect according to eye not only is defined in above-mentioned formula certainly, also can add the adjustment of small hole amount or other factor.

What the present invention adopted is the face structure of both-sided aspherical, in addition, needs to begin the processing on two sides after might not just therefore accepting and order for goods in the job operation of eyeglass.For example can adopt the method for " semi-manufacture (the semi-finishing lens or omit also to be called and partly finish the product lens) " of preparing the object side surface that meets the object of the invention in advance.Select described " semi-manufacture of object side surface " in the back of accepting and order for goods according to the prescription number of degrees or above-mentioned customization specifications such as (individual design), just can reduce cost and improve process velocity by after accepting and order for goods, only processing the eyeball side surface and carrying out finishing.

As the concrete example of this method, for example in convex shape (the present invention) design of described [3]-1, just can adopt the method that object side surface is symmetrical " semi-manufacture " of preparing in advance.Be straight line in this principal meridian (=main line of regard) promptly, the astigmatism distribution of refractive surface take the principal meridian as the design of boundary's left-right symmetric, is not the principal meridian to the small hole (with reference to Figure 41 described later) of having considered eye.Since do not need as left eye with, right eye with and prepare semi-permeable mirror respectively, so process or stock control easy.Interocular distance, when seeing nearby to object distance from add personal information input such as the number of degrees after, meet the asymmetric curved design in the left and right sides (gradual change portion, closely the astigmatism distribution with portion's refractive surface is to be that the boundary is asymmetrical with the principal meridian) of purpose by the eyeball side surface to this eyeglass, nearly usefulness portion that just can be corresponding with personal information is close.

Following one side illustrates the embodiment of the both-sided aspherical type gradual change focal power eyeglass that designs according to above-mentioned method for designing on one side with reference to accompanying drawing.

Fig. 7 is embodiment 1,4,5, prior art A 6 and corresponding with each number of degrees, B, " the surface light focal power " of C and " for the strict multiplying power result of calculation of specific line of sight direction " are summarised in table 1-1 and show the table that 1-2 represents, Fig. 8 is embodiment 2, prior art A 7 and corresponding with each number of degrees, B, " the surface light focal power " of C and " for the strict multiplying power result of calculation of specific line of sight direction " are summarised in table 2-1 and show the table that 2-2 represents, Fig. 9 is embodiment's 3 and the prior art A corresponding with its number of degrees, B, " the surface light focal power " of C and " for the strict multiplying power result of calculation of specific line of sight direction " are summarised in table 3-1 and show the table that 3-2 represents, Figure 10 is the curve 1-1 of expression embodiment 1 and embodiment 2 surface light power profile, 1-2,2-1, the curve that 2-2 represents, Figure 11 is the curve 3-1 of expression embodiment 3 surface light power profile, the curve that 3-2 represents, Figure 12 is the curve 4-1 of expression embodiment 4～embodiment 6 surface light power profile, 4-2,5-1,5-2,6-1, the curve map that 6-2 represents, the 13rd, the curve 7-1 of expression embodiment 7 surface light power profile, the curve that 7-2 represents, Figure 14 are expression prior art example A, B, the curve A-1 of C surface light power profile, A-2, B-1, B-2, C-1, the curve that C-2 represents.

What Figure 15 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Msv, what Figure 16 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Msh, what Figure 17 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Mpv, what Figure 18 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-Mph, what Figure 19 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-M γ v, what Figure 20 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-M γ h, what Figure 21 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-SMv, and what Figure 22 represented is embodiment 1 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 1-3-SMh.

What Figure 23 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Msv, what Figure 24 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Msh, what Figure 25 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Mpv, what Figure 26 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-Mph, what Figure 27 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-M γ v, what Figure 28 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen, and what carry out that strict multiplying power is calculated and curve 2-3-M γ h Figure 29 of the result that expression is tried to achieve represents is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-SMv, and what Figure 30 represented is embodiment 2 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 2-3-SMh.

What Figure 31 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Msv, what Figure 32 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Msh, what Figure 33 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Mpv, what Figure 34 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-Mph, what Figure 35 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-M γ v, what Figure 36 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-M γ h, what Figure 37 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-SMv, and what Figure 38 represented is embodiment 3 and the three kind conventional example As corresponding with its number of degrees, B, the C eyeglass distributes in the multiplying power when main line of regard is seen and carries out that strict multiplying power is calculated and the result's that expression is tried to achieve curve 3-3-SMh.

(embodiment 1)

The table 1-1 of Fig. 7 is the complete list about the surface light focal power of the embodiment of the invention 1.The number of degrees of this embodiment 1 eyeglass are corresponding with S0.00Add3.00, to close in order comparing and to remember three kinds of prior art examples that have with the number of degrees.Prior art example A correspondence be that object side surface is transitional surface " a convex surface gradual change focal power eyeglass ", prior art example B correspondence be that object side surface and eyeball side surface both sides are transitional surface " two sides gradual change focal power eyeglasses ", prior art example C correspondence be that the eyeball side surface is transitional surface " a concave surface gradual change focal power eyeglass ".The meaning of used project is as follows among the table 1-1.

DVf1: object side surface is far used the vertical surperficial focal power of number of degrees measuring position F1

DHf1: object side surface is far used the lateral surfaces focal power of number of degrees measuring position F1

DVn1: object side surface is closely used the vertical surperficial focal power of number of degrees measuring position N1

DHn1: object side surface is closely used the lateral surfaces focal power of number of degrees measuring position N1

DVf2: the eyeball side surface is far used the vertical surperficial focal power of number of degrees measuring position F2

DHf2: the eyeball side surface is far used the lateral surfaces focal power of number of degrees measuring position F2

DVn2: the eyeball side surface is closely used the vertical surperficial focal power of number of degrees measuring position N2

DHn2: the eyeball side surface is closely used the lateral surfaces focal power of number of degrees measuring position N2

The curve 1-1 of Figure 10 and 1-2 are the curve of expression along the surface light power profile of embodiment 1 eyeglass master line of regard, and transverse axis is represented the position (distance) of eyeglass, and the right side is that eyeglass top, left side are the eyeglass belows, longitudinal axis presentation surface focal power.1-1 is corresponding with the object side surface of eyeglass at this curve, and curve 1-2 is corresponding with the eyeball side surface of eyeglass.The curve representation of solid line is along the vertical surperficial optical power profile of eyeglass master line of regard, and the curve representation of dotted line is along the lateral surfaces optical power profile of eyeglass master line of regard.

As shown in the figure, expression is along the curve C V1 (solid line) of vertical surperficial optical power profile of object side surface master line of regard among the curve 1-1, its optical power profile is from gradation zone portion～closely change with portion, and the curve C H1 (dotted line) of expression lateral surfaces optical power profile is indeclinable.Band～closely the surface light focal power with portion is different to the curve C H1 (dotted line) of the curve C V1 (solid line) that represents vertical surperficial optical power profile and expression lateral surfaces optical power profile from gradual change portion.

At this moment, optically by in the light on the object side surface master line of regard, roughly vertically and that part of astigmatism that then produces of lateral surfaces difference in power.

On the other hand, as shown in the figure, expression is along the curve C V2 (solid line) of vertical surperficial optical power profile of eyeball side surface master line of regard among the curve 1-2, and its optical power profile is far with portion～gradation zone portion～be indeclinable with portion closely.And the curve C H2 (dotted line) of expression lateral surfaces optical power profile is from gradation zone portion～closely use portion's surface light focal power difference.The curve C V2 (solid line) that represents this vertical surperficial optical power profile is also identical with curve 1-1 with the surface light power profile of the curve C H2 (dotted line) of expression lateral surfaces optical power profile, and taking near from gradual change portion is different with portion.

As understanding from this curve 1-2, the difference of its surface light focal power distributes corresponding with contrary tendency with respect to curve 1-1, recognizes that the difference of surface light focal power has given to offset with the astigmatism of object side surface generation for the light on eyeball side surface master line of regard.

Consequently can give far with the number of degrees and the adding number of degrees according to prescription values according to altogether the refractive surface of object side surface and eyeball side surface.

These curves are the different substantially curves of explanation face structure, and have omitted the additional astigmatic inferior key element of situation that becomes to grade that is used for the aspherisation that the periphery astigmatism is removed or is used to tackle astigmatism degree.(following embodiment 2～7 too)

In order to compare, with the curve of the routine eyeglasses of three kinds of prior aries of the number of degrees, in Figure 14, to close and remembered curve A-1 and 2, curve B-1 and 2, curve C-1 and 2 along the surface light power profile of main line of regard as expression table 1-1 note.The meaning of term is as follows in these curves.

F1: the number of degrees measuring position of using far away of object side surface

F2: the number of degrees measuring position of using far away of eyeball side surface

N1: the nearly number of degrees measuring position of using of object side surface

N2: the nearly number of degrees measuring position of using of eyeball side surface

CV1: expression is along the curve (representing with solid line) of vertical surperficial optical power profile of object side surface master line of regard

CH1: expression is along the curve (being represented by dotted lines) of the lateral surfaces optical power profile of object side surface master line of regard

CV2: expression is along the curve (representing with solid line) of vertical surperficial optical power profile of eyeball side surface master line of regard

CH2: expression is along the curve (being represented by dotted lines) of the lateral surfaces optical power profile of eyeball side surface master line of regard

The F1 of these curves, N1, F2, N2 surface light focal power are corresponding with described table 1-1, and the meaning of terms such as the DVf1～DHn2 also situation with described table 1-1 is identical.What be positioned at that the horizontal direction dot-and-dash line of these curve central authorities represents is the average surface focal power (the vertical mean value of the focal power of surface light in length and breadth of F1 and N1) of object side surface.The object side surface average surface focal power of the embodiment of the invention 1 and three kind of prior art example all is unified in 5.50 diopters and compares.

Eight kinds of curves that begin with curve 1-3-of following Figure 15～shown in Figure 22 are the multiplying power when the eyeglass master line of regard of the embodiment of the invention 1 is seen to be distributed carry out that described strict multiplying power is calculated and the result's that expression is tried to achieve curve, towards the transverse axis right side is that eyeglass top, left side are the eyeglass belows, and the longitudinal axis is represented multiplying power.Dense solid line is embodiment 1 among the figure, and shallow dot-and-dash line is prior art A, and dense dot-and-dash line is prior art B, and shallow solid line is prior art C.Below this kind curve also identical.When using the eyeball rotation angle to compare each direction of sight line, transverse axis makes the longitudinal axis multiplying power engineer's scale unanimity of each curve.The meaning at the appended symbol in curve 1-3-back is:

Msv: form factor longitudinally

Msh: horizontal form factor

Mpv: focal power factor longitudinally

Mph: horizontal focal power factor

M γ v: prism factor longitudinally

M γ h: horizontal prism factor

SMv: multiplying power longitudinally

SMh: horizontal multiplying power

As previously mentioned, multiplying power SMv and horizontal multiplying power SMh have following relation of plane longitudinally.

SMv＝Msv×Mpv×Mγv

SMh＝Msh×Mph×Mγh

The eyeglass of embodiment 1 and described three kinds of prior art examples all is set at refractive index n=1.699, center thickness t=3.0mm, does not have the specification of prism at geometry center GC.The object space focal power (to object distance from inverse) be set at the object space focal power Px=0.00 diopter (infinity) of F1, F2, the object space focal power Px=2.5 diopter (40cm) of N1, N2, the object space focal power of other position is giving along being multiplied by 2.5 diopters on the additional optical focal power ratio of main line of regard.And be set at: the summit is to the distance L=15.0mm of corneal vertex, the distance C R=13.0mm that corneal vertex arrives the eyeball rotation center behind the eyeglass.Eyeball rotation angle θ is placed on the normal that makes the geometry center GC of eyeball rotary middle point C by the object side lens surface, and the rotation angle this normal when consistent with sight line is set at 0 and spends, and the top is expressed as (+), the below is expressed as (-).Then, by being unified into eyeball rotation angle θ=+ 15.0 degree,, and can under identical condition, compare to positive and negative either side the distribution of gradation or surface light focal power eyeball rotation angle θ=-30.0 degree of N1, N2 to F1, F2.

The table 1-2 of Fig. 7 is the prior art example for embodiments of the invention 1 and three kinds of eyeglasses preparing in order to compare, to the complete list of the strict multiplying power result of calculation of specific line of sight direction, be corresponding with curve 1-3-SMv (comprehensive longitudinally multiplying power) and the curve 1-3-SMh (horizontal comprehensive multiplying power) of Figure 22 of described Figure 21.As previously mentioned bright because the value of vertical and horizontal multiplying power is different, so will calculate both sides' multiplying power.At this, it is as follows to show the represented meaning of 1-2 symbol.

By vertical multiplying power of using on the sight line of measurement point far away

SMvn: by nearly vertical multiplying power of using on the sight line of measurement point

SMvfn: vertical difference of magnification (SMvn-SMvf)

SMhf: by the horizontal multiplying power of using on the sight line of measurement point far away

SMhn: by the nearly horizontal multiplying power of using on the sight line of measurement point

SMhfn: horizontal difference of magnification (SMhn-SMhf)

When trying that the table SMvfn of 1-2 and SMhfn are vertical difference of magnification (SMvn-SMvf) and horizontal difference of magnification (SMhn-SMhf), then recognize for prior art example A be 0.1380 and 0.1015, prior art example B is 0.1360 and 0.0988, prior art example C is 0.1342 and 0.0961, it is 0.1342 and 0.0954 low like this difference of magnification that the value of the embodiment of the invention can be suppressed to.That is, recognize since the difference of magnification of the usefulness far away portion of the embodiment of the invention 1 and nearly usefulness portion than prior art 1 still less, so than prior art 1 improvement is arranged more even the distortion of picture is arranged or rock also.Fall into a trap at the patent documentation 2 corresponding and to have calculated multiplying power, but do not consider vertical or horizontal difference fully with described prior art 1.If carries out corresponding with the embodiment of the invention 1 the curve 1-3-SMh (horizontal comprehensive multiplying power) of curve 1-3-SMv (comprehensive longitudinally multiplying power) and Figure 22 of Figure 21 of calculating of strict multiplying power compare at once and just can understand that the multiplying power distribution of vertical and horizontal picture is obviously different.This difference also just found out easily mainly be nearly usefulness portion and below (eyeball rotation angle-20 ° near below) remarkable.

The calculating formula of multiplying power as described

Multiplying power SMv=Msv * Mpv * M γ v longitudinally

Horizontal multiplying power SMh=Msh * Mph * M γ h is such,

Curve 1-3-SMv is three key elements: the value of curve 1-3-Msv and curve 1-3-Mpv and curve 1-3-M γ v multiplies each other and obtains, and similarly curve 1-3-SMh is three key elements: the value of curve 1-3-Msh and curve 1-3-Mph and curve 1-3-M γ h multiplies each other and obtains.At this if each key element vertically with laterally compare, it is significantly poor then not see in form factor Msv and Msv, closely sees different with subordinate side (eyeball rotation angle-25 ° near below) at Mpv and Mph.And M γ v and M γ h near with portion and below (eyeball rotation angle-15 ° near below) have tangible different.Recognize that promptly the curve 1-3-SMv main cause different with curve 1-3-SMh is the different of M γ v and M γ h, what less important reason was Mpv with Mph is different, and it is significantly poor not see among Msv and the Msh, and almost it doesn't matter.Promptly, with the corresponding patent documentation 2 of prior art 1 in why do not see vertically different with horizontal multiplying power, be owing to the prism factor M γ v and the M γ h that become the different main causes of multiplying power are not considered fully, so and to the focal power factor Mpv of secondary cause and Mph also since ignored to object distance from or the angle of sight line and eyeglass, so also can't see poor.Even as the form factor Msv and the Msv that improve evidence,, also can't see the mutual difference of each example of far and near difference of magnification so long as use the engineer's scale of the embodiment of the invention 1 use to see for prior art 1.

Prior art 1 is come " can reduce the distortion of picture or rock " by " reducing far away from portion and nearly difference of magnification with portion ", and the present invention more has " the vertical and horizontal difference of magnification of minimizing " also effect of " can reduce the distortion of picture or rock ".Promptly avoid cubic object to be seen as object flat or circle and be seen as ellipse.Raising on this visual sense feeling relatively is to have caught " making ratio near 1 " to be only essence with " it is poor to reduce ".It is important in this that cubic object is seen as object flat or circle and is seen as oval-shapedly feel not to be " far and near than " but " aspect ratio ".That is, the present invention is not only " difference of magnification that reduces usefulness portion far away and nearly usefulness portion ", but is the effect of improving that obtains " can reduce the distortion of picture or rock " by " the vertical and horizontal difference of magnification of minimizing makes the multiplying power ratio approach 1 " as prior improvement.And these tendencies mainly are closely remarkable with subordinate side (eyeball rotation angle-25 ° near following).

The astigmatism distribution of embodiment 1 eyeglass and the measurement result that the average number of degrees distribute have been represented at this.Measurement result is to use the curve representation that waits leveling point that connects 0.25 diopter spacing.

Disclosed accompanying drawing all is the right eye eyeglass in the present specification, directly is that 50mm describes with eyeglass.

Figure 39 is the figure of astigmatism distribution under the expression two sides design eyeglass transmissive state, and Figure 40 is the figure that the average number of degrees of expression distribute in the same manner.

Figure 41 is the figure of expression two sides design convex lens surface side (first face) astigmatism distribution, and Figure 42 is the figure that the average number of degrees of expression distribute in the same manner.It is special that to understand be that gradation zone portion roughly became and approaches linearity during the astigmatism distribution and the average number of degrees distributed.And not exclusively be that straight line is owing to include the cause of aspheric surface composition.

Figure 43 is the figure that expression two sides design convex lens surface side (first face) refractive surface horizontal stroke (level) U Degree U distributes, and Figure 44 is the figure that vertical (vertically) U Degree U of the identical refractive surface of expression distributes.

Figure 45 is the figure of expression two sides design eyeglass concave side refractive surface astigmatism distribution, and Figure 46 is the figure that the average number of degrees of expression distribute in the same manner.

Figure 47 is the figure that expression two sides design eyeglass concave side (second face) refractive surface horizontal stroke (level) U Degree U distributes, and Figure 48 is the figure that vertical (vertically) U Degree U of the identical refractive surface of expression distributes.

In order to compare, the astigmatism distribution of prior art eyeglass and the measurement result that the average number of degrees distribute have been represented.

Figure 49 is the figure of expression prior art convex lens surface side (first face) astigmatism distribution, and Figure 50 is the figure that the average number of degrees of expression distribute in the same manner.

Figure 51 is the figure that expression prior art convex lens surface side (first face) refractive surface horizontal stroke (level) U Degree U distributes, and Figure 52 is the figure that vertical (vertically) U Degree U of expression refractive surface distributes in the same manner.

Under the situation of prior art eyeglass, concave side (second face) is sphere or astigmatic face, connects the curve that waits leveling point of 0.25 diopter spacing owing to can not draw, so omit.

(embodiment 2)

The table 2-1 of Fig. 8 is the complete list about the surface light focal power of the embodiment of the invention 2.The number of degrees of these embodiment 2 eyeglasses are corresponding with S+6.00 Add3.00, also remember three kinds of prior art examples that have with the number of degrees in order to compare.And the record method of these prior aries is identical with embodiment 1 with term etc.(also be the same in the explanation of following examples.)

In order to compare, the curve A-1 and the A-2 that in described embodiment 1, use have been reused, curve B-1 and B-2, curve C-1 and C-2 along note among the table 2-1 with the curve of the main line of regard surface light power profile of three kinds of prior art examples of the number of degrees as expression.Therefore the meaning of the term of these curves is identical with described embodiment 1, F1, N1, F2, N2 surface light focal power are also corresponding with table 2-1, the average surface focal power of the object side surface represented of horizontal direction dot-and-dash line that is positioned at central authorities is also corresponding with table 2-1, so all be the dark like this curves of 10.50 diopters.

Among the curve 2-1 of Figure 10, the curve 2-2 expression along the curve C H1 (dotted line) of the curve C V1 (solid line) of vertical surperficial optical power profile of object side surface master line of regard, expression lateral surfaces optical power profile, expression along vertical surperficial optical power profile of eyeball side surface master line of regard curve C V2 (solid line) and represent that the far away of curve C H2 (dotted line) of lateral surfaces optical power profile express similarly to Example 1 tendency with portion～gradation zone portion～closely with the change shape of portion.The difference of recognizing the surface light focal power according to this point has given to offset with the astigmatism of object side surface generation for the light on eyeball side surface master line of regard.

Even consequently in embodiment 2, also can give to use the number of degrees and add the number of degrees the refractive surface of object side surface and eyeball side surface altogether similarly to Example 1 according to the far away of prescription values.

Eight kinds of curves with " curve 2-3-" beginning of following Figure 23～shown in Figure 30 are the multiplying power when the eyeglass master line of regard of the embodiment of the invention 2 is seen to be distributed carry out that described strict multiplying power is calculated and the result's that expression is tried to achieve curve.Dense solid line in figure such as the meaning of term and " curve 2-3-" appended symbol in back is the embodiment 2, and remaining is identical with the situation of described embodiment 1.All the situation with described embodiment 1 is identical for refractive index, object space focal power and the eyeball rotation angle etc. used in embodiment 2 and the described three kinds of prior art examples, but the number of degrees of embodiment 2 and described three kinds of prior art examples are owing to be S+6.00 Add3.00, so only center thickness t is 6.0mm and approaching with actual product.

The table 2-2 of Fig. 8 is to the complete list of the strict multiplying power result of calculation of specific line of sight direction, to be corresponding with described curve 2-3-SMv (comprehensive longitudinally multiplying power) and curve 2-3-SMh (horizontal comprehensive multiplying power) for embodiments of the invention 2 and three kinds of prior aries example of preparing in order to compare.At this, the meaning that table 2-2 symbol is represented and described table 1-2's is equivalent in meaning.

As the SMvfn and the SMhfn that try table 2-2, be vertical difference of magnification (SMvn-SMvf) and horizontal difference of magnification (SMhn-SMhf), then recognize with prior art example A be 0.2275 and 0.1325, prior art example B is 0.2277 and 0.1268, prior art example C is 0.2280 and 0.1210 relative, it is 0.2151 and 0.1199 low like this difference of magnification that the value of the embodiment of the invention 2 can be suppressed to.That is, recognize since the difference of magnification of the usefulness far away portion of the embodiment of the invention 2 and nearly usefulness portion than prior art 1 still less, so than prior art 1 improvement is arranged more even the distortion of picture is arranged or rock also.With described embodiment 1 similarly, if carries out corresponding with the embodiment of the invention 2 the curve 2-3-SMv (comprehensive longitudinally multiplying power) that calculates of strict multiplying power compare at once with curve 2-3-SMh (horizontal comprehensive multiplying power) and just can understand that the multiplying power distribution of vertical and horizontal picture is obviously different.

This difference is also found out it mainly is that (eyeball rotation angle-10 ° near following) significantly from the pars intermedia to the below easily.Even with described embodiment 1 similarly in embodiment 2, curve 2-3-SMv is three key elements: the value of curve 2-3-Msv and curve 2-3-Mpv and curve 2-3-M γ v multiplies each other and obtains, and similarly curve 2-3-SMh is three key elements: the value of curve 2-3-Msh and curve 2-3-Mph and curve 2-3-M γ h multiplies each other and obtains.At this if each key element vertically with laterally compare, it is significantly poor then not see in form factor Msv and Msv, closely sees different with subordinate side (eyeball rotation angle-20 ° near below) at Mpv and Mph.And M γ v and M γ h from pars intermedia to below (eyeball rotation angle-10 ° near below) have tangible different.This far away with portion above (eyeball rotation angle+20 ° near more than) also seen poorly, but appearance of each example difference is above usefulness portion far away suitable (eyeball rotation angle+30 ° near more than), so owing to usage frequency also can be ignored less.

Promptly, even among embodiments 2 also recognize similarly that with described embodiment 1 the different main cause of the curve 2-3-SMh of the curve 2-3-SMv of Figure 29 and Figure 30 is the different of M γ v and M γ h, what less important reason was Mpv with Mph is different, it is significantly poor not see among Msv and the Msh, and almost it doesn't matter.Even improve the form factor Msv and the Msv of basis,, also can't see the mutual difference of each example of far and near difference of magnification so long as use the reduced scale of the embodiment of the invention 2 uses to see for prior art 1.Even it is and also same in embodiment 2 with described embodiment 1, be not only " difference of magnification that reduces usefulness portion far away and nearly usefulness portion ", but be the effect of improving that obtains " can reduce the distortion of picture or rock " by " the vertical and horizontal difference of magnification of minimizing makes the multiplying power ratio approach 1 " as prior improvement.And these tendencies mainly are closely remarkable with subordinate side (eyeball rotation angle-25 ° near following).

(embodiment 3)

The table 3-1 of Fig. 9 is the complete list about the surface light focal power of the embodiment of the invention 3.

The number of degrees of this embodiment 3 are corresponding with S-6.00 Add3.00, also remember three kinds of prior art examples that have with the number of degrees in order to compare.

The curve 3-1 and 2 of Figure 11 is expression curves along the surface light power profile of the embodiment of the invention 3 main line of regards.3-1 is corresponding with object side surface at this curve, and curve 3-2 is corresponding with the eyeball side surface.

And in order to compare, as representing along the curve of note among the table 3-1 of Fig. 9 with the main line of regard surface light power profile of three kinds of prior art examples of the number of degrees, the curve A-1 and the A-2 that in described

embodiment

1 or 2, use have been reused, curve B-1 and B-2, curve C-1 and C-2.F1, N1, F2, N2 surface light focal power are also corresponding with table 3-1, and the average surface focal power of the object side surface represented of horizontal direction dot-and-dash line that is positioned at central authorities is also corresponding with table 3-1, so all be the shallow like this arcs of 2.50 diopters.

The curve 3-1 of Figure 12, expression is along the curve C V1 (solid line) of vertical surperficial optical power profile of object side surface master line of regard among the curve 3-2, the curve C H1 (dotted line) of expression lateral surfaces optical power profile, expression is far away from portion～gradation zone portion～closely express and embodiment 1 with the change shape of portion along the curve C H2's (dotted line) of the curve C V2 (solid line) of vertical surperficial optical power profile of eyeball side surface master line of regard and expression lateral surfaces optical power profile, the tendency that embodiment 2 is same, the difference of recognizing the surface light focal power is offset for the astigmatism that has given to produce with object side surface the light on eyeball side surface master line of regard.Consequently with embodiment 1, embodiment 2 similarly altogether the refractive surface of object side surface and eyeball side surface, can give according to prescription values far away with the number of degrees with add the number of degrees.

Eight kinds of curves with curve 3-3-beginning of following Figure 31～shown in Figure 38 are the multiplying power when the eyeglass master line of regard of embodiment 3 is seen to be distributed carry out that described strict multiplying power is calculated and the result's that expression is tried to achieve curve.All the situation with described embodiment 1 or embodiment 2 is identical for refractive index, object space focal power and the eyeball rotation angle etc. used in embodiment 3 and the described three kinds of prior art examples, but the number of degrees of embodiment 3 and described three kinds of prior art examples are owing to be S-6.00 Add3.00, so only center thickness t is 1.0mm and approaching with actual product.

The table 3-2 of Fig. 9 is to the complete list of the strict multiplying power result of calculation of specific line of sight direction, to be corresponding with described curve 3-3-SMv (comprehensive longitudinally multiplying power) and curve 3-3-SMh (horizontal comprehensive multiplying power) for embodiments of the invention 3 and three kinds of prior aries example of preparing in order to compare.

As the SMvfn and the SMhfn that try table 3-2, be vertical difference of magnification (SMvn-SMvf) and horizontal difference of magnification (SMhn-SMhf), then recognize with prior art example A be 0.0475 and 0.0774, prior art example B is 0.0418 and 0.0750, prior art example C is 0.0363 and 0.0727 relative, the value of the embodiment of the invention 2 is 0.0512 and 0.0726 such values, vertically difference of magnification increased and laterally difference of magnification reduced.But it then all is 1/3 to 1/5 low like this value that vertical difference of magnification is compared with embodiment 2 with described embodiment 1, when taking all factors into consideration horizontal difference of magnification and reduce a little simultaneously, we can say that then far away the comparing with prior art 1 with nearly difference of magnification with portion with portion of embodiment 3 do not have big difference.But during observed the carry out corresponding curve 3-3-SMv that calculates of strict multiplying power (longitudinally comprehensively multiplying power) and curve 3-3-SMh (horizontal comprehensive multiplying power) with embodiment 3, be that embodiment 3 compares with conventional example particularly closely minimum with " vertically multiplying power is than the 1 little tendency " of subordinate side (eyeball rotation angle-20 ° near below), the result is that " difference of magnification in length and breadth " is minimum, as distortion or rock than conventional example also make moderate progress.

Among the curve 3-3-SMv of Figure 37 (comprehensive longitudinally multiplying power), vertically with the multiplying power of horizontal picture distribute occur obviously not being both from pars intermedia to below near near the top (eyeball rotation angle+10 ° more than) of (eyeball rotation angle-10 ° following) and usefulness portion far away, but each routine poor appearance be closely with subordinate side (eyeball rotation angle-20 ° near below) and far usefulness portion a little above (eyeball rotation angle+25 ° near more than).So wherein far with the top a little of portion since usage frequency also can ignore less, but closely many and can not ignore with subordinate side's usage frequency.Consequently the embodiment of the invention 3 is compared with conventional example, particularly closely with subordinate side (eyeball rotation angle-20 ° near below) vertically multiplying power approach 1 most, consequently " difference of magnification in length and breadth " is minimum, as distortion or rock than conventional example also make moderate progress.And these tendencies mainly are closely remarkable with subordinate side (eyeball rotation angle-25 ° near following).And for prior art 1 as the form factor Msv and the Msv that improve basis, with the embodiment of the invention 1 or embodiment 2 similarly so long as the reduced scale that uses embodiment 3 to use see, also can't see the mutual difference of each example of far and near difference of magnification.

(embodiment 4～7)

As embodiments of the invention, the combination of various surface light power profile can be arranged in the described scope of technical scheme scope in addition except described embodiment 1～3.Represented embodiment 4～6 with embodiment 1 with the application examples of the number of degrees in this conduct, as having represented embodiment 7 with the application examples of the number of degrees with embodiment 2.Curve 4-1, the 4-2 of the surface light focal power of these embodiment and the table 1-1 that is indicated on Fig. 7 for the strict multiplying power result of calculation complete list and the curve of specific line of sight direction, table 1-2 and Figure 12～Figure 14 are in curve 7-1,7-2.

(variation)

The present invention is not only common prescription values, and the glasses wearer's who seldom grasps as former eyeglass producer individual factor, for example distance from corneal vertex to summit, eyeglass rear, distance from the eyeball rotation center to summit, eyeglass rear, right and left eyes does not wait the degree of seeing thing, the difference in height of right and left eyes, frequency is the highest see nearby to object distance from, the top rake of picture frame (above-below direction), angle of oscillation (left and right directions), put etc. for the V-arrangement restitope of lens edge thickness direction and to join in the lens design as input information, the requirement that meets customization (individual design) so also is possible.

(variation 1)

Two kinds of both-sided aspherical type gradual change focal power eyeglasses to variation 1 describe.

The first both-sided aspherical type gradual change focal power eyeglass of variation 1,

It has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface,

DVn-DHf>ADD/2

The second both-sided aspherical type gradual change focal power eyeglass of variation 1,

DVn-DHf>ADD/2

And, any position in described rectangle,

At first the longitudinal profile curve of decision object side surface in the design of these eyeglasses by F1.The technology that this section curve is had when distributing by the vertical number of degrees that determine principal meridian in the existing gradual change focal power eyeglass just can determine.(for example with reference to the present application person No. 2549738 designing technique of Jap.P.)

Then this curve is defined the surfaces of revolution as bus.The turning axle of the surfaces of revolution be in comprising the plane of bus (in the section) for the vertical line of the normal of eyeglass geometry center bus, when the longitudinal curvature radius F1 is set at R1, when the normal of F1 bus was set at θ with the angle that normal became of geometry center bus, only the distance R that is defined by R=R1*COS θ was to be positioned at from F1 to position that the eyeball side is left.Use this turning axle by making the bus rotation that has defined earlier, just can define vertical number of degrees and the horizontal number of degrees consistent object side surface that makes F1.

Be in the above description the object side surface of eyeglass as the surfaces of revolution, but used the scanning plane of same bus also can implement the present invention.So-called scanning plane is the face that bus has been carried out scanning along solid curve (below be called sweep trace).

Figure 57 has represented general scanning plane example.

Vertical solid line by F1 among Figure 57 is a meridian.

Figure 58 sees that from the eyeglass side the meridianal figure of Figure 57, O1 represent the meridianal center of curvature point of F1, and the arrow length from O1 to F1 is represented the meridianal radius-of-curvature of F1.Shortening to the length of below arrow from the top is that expression is gradually changing along meridianal radius-of-curvature.

Horizontal dotted line by F1 among Figure 57 is a sweep trace.

Figure 59 is the figure that sees Figure 57 sweep trace from the eyeglass top, and O1 represents the center of curvature point of F1 sweep trace, and the arrow length from O1 to F1 is represented the radius-of-curvature of F1 sweep trace.

The equal in length of three arrows is that this sweep trace of expression is to be the circle at center with O1.

The example of from Figure 60 to Figure 62, having represented various sweep traces.

Figure 60 be expression along with leaving and the example of the sweep trace that radius-of-curvature diminishes from F1,

Figure 61 is the example of the expression sweep trace that the radius-of-curvature change is big along with leaving from F1,

Figure 62 is that expression is accompanyed or follow the difference of F1 departure direction and radius-of-curvature changes the example with regard to different sweep traces.

Even the scanning plane that comprises the surfaces of revolution that uses in this variation 1 also has following characteristics especially in general scanning plane, with reference to accompanying drawing 53～accompanying drawing 55 on one side describe on one side.

At this, Figure 53 is the figure of expression variation vertical (vertically) U Degree U distribution of 1 eyeglass object side surface (first face), Figure 54 is the figure of the surperficial astigmatism distribution of expression variation 1 eyeglass object side surface, and Figure 55 is the figure that the average number of degrees in surface of expression variation 1 eyeglass object side surface distribute.Among each figure the longitudinal profile curve by F1 reach with 50% the position that gives that the longitudinal profile number of degrees change from F1 to the N1 equal height as the center, on being positioned at vertically ± and two horizontal lines of 4mm and distance are two rectangles that ordinate surrounded that are positioned at horizontal direction ± 15mm by the straight line longitudinally of F1, make to dot.

Figure 56 is the curve of expression by the longitudinal profile curve number of degrees variation of F1.When vertically be set at distance, laterally reaching from F1 when being set at 100% with nearly number of degrees variation with number of degrees measuring position point N1 equal height, expression be the number percent of number of degrees variable quantity for the F1 number of degrees.Shown in Figure 56, this rectangle is being equivalent to the center as rectangle, 50% position in the center of above-below direction.

This rectangular area is the gradation feature zone of remarkable expression in the gradual change focal power eyeglass.

As recognizing from accompanying drawing, vertical number of degrees are for not changing to horizontal moving in the scanning plane that comprises the surfaces of revolution that the present invention uses.Therefore, when seeing the level line that the longitudinal profile number of degrees shown in Figure 53 distribute, in above-mentioned rectangle horizontal wire.And the level line that the average number of degrees in the surface shown in the level line of the surperficial astigmatism distribution in the surfaces of revolution shown in Figure 54 or Figure 55 distribute similarly is horizontal wire in above-mentioned rectangle with the level line that the longitudinal profile number of degrees distribute also.

The eyeglass of this variation 1 not only has strict scanning plane, and comprises and be added with some aspheric surfaces and proofread and correct.Therefore, each distributes is not complete level, though in based on the face of scanning plane in above-mentioned rectangle any position, the differential value of the longitudinal profile number of degrees has the absolute value feature bigger than the absolute value of horizontal differential value of vertical differential value.And in face based on the surfaces of revolution, though in above-mentioned rectangle any position, the differential value of the average number of degrees of the differential value of surperficial astigmatism amount or surface also has the absolute value feature bigger than the absolute value of horizontal differential value of vertical differential value.

Following the above-mentioned rectangular centre of the surfaces of revolution, the absolute value that promptly gives to reach from F1 each differential value of 50% position that changes with the longitudinal profile number of degrees of N1 equal height in the longitudinal profile curve by F1 is represented.

The absolute value of longitudinal profile number of degrees differential value (unit: diopter/mm[refractive index: as 1.699])

Laterally: 0.0, vertically: 0.24

The absolute value of surface astigmatism amount differential value (unit: diopter/mm[refractive index: as 1.699])

Laterally: 0.0, vertically: 0.23

The absolute value of surface average degree fractional differentiation value (unit: diopter/mm[refractive index: as 1.699])

Laterally: 0.0, vertically: 0.12

Simple in the above-mentioned example in order to illustrate, for as the surfaces of revolution and horizontal differential value all is zero.Mainly be used to the generation astigmatism of can not quadrature by sight line and eyeglass face and causing and the number of degrees are changed and eliminated or " corrective action " of reduction, promptly, aspheric surface is proofreaied and correct and preferably is added on the side of object side surface or eyeball side surface, or is added on the both sides.But also just had some values if add the then horizontal differential value of aspheric surface correction.But the feature that the absolute value that keeps vertical differential value is bigger than the absolute value of horizontal differential value.

Mainly be used to the generation astigmatism of can not quadrature by sight line and eyeglass face and causing and the number of degrees are changed and eliminated or " corrective action " of reduction, promptly, aspheric surface is proofreaied and correct and preferably is added on the side of object side surface or eyeball side surface, or is added on the both sides.

This variation 1 is to use the design load of present specification embodiment 1, and has used the aspheric surface key element eliminated.

Design the eyeball side surface below.Because in general the eyeball side surface is the curved surface with complicated shape, so utilize batten (スプライ Application) curve and surface.Original shape is made sphere, calculate on one side and by ray tracing and estimate the transmission aberration profile and can realize that the transmission aberration profile to hope, the number of degrees of writing out a prescription, gradual change belt length are close, come like this to define the eyeball side surface by the parameter variation that makes curved surface.

Design object side surface and eyeball side surface in this wise.

(variation 2)

Both-sided aspherical type gradual change focal power eyeglass to variation 2 describes.

The both-sided aspherical type gradual change focal power eyeglass of variation 2, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface,

This both-sided aspherical type gradual change focal power eyeglass

DVn-DHn>ADD/2

And, the surperficial astigmatism composition of the N1 of described first refractive surface is offset at described second refractive surface, give near with the number of degrees (Dn) according to prescription values described first and second refractive surfaces altogether.

And the both-sided aspherical type gradual change focal power eyeglass of described variation 2 is added in the above-mentioned structure,

When far being set at DHf, DVf in respectively described first refractive surface with the lateral surfaces focal power of number of degrees measuring position F1 and vertical surperficial focal power,

DHf+DHn＜DVf+DVn, and

DVn-DHn〉ADD/2 and

DHn-DHf<ADD/2

And, the F1 of described first refractive surface and the surperficial astigmatism composition among the N1 are offset at described second refractive surface, described first and second refractive surfaces are given to use the number of degrees (Df) and add the number of degrees (ADD) according to the far away of prescription values altogether.

And the both-sided aspherical type gradual change focal power eyeglass of described variation 2 is added among any of above-mentioned two kinds of structures,

Described first refractive surface is to be boundary and left-right symmetric by a described meridian with number of degrees measuring position F1 far away, described second refractive surface is to be boundary and the left and right sides is asymmetric with the meridian with number of degrees measuring position F2 far away by this second refractive surface, and the nearly configuration of this second refractive surface with number of degrees measuring position N2 be only with predetermined distance inwardly near nasal side, eye is corresponding to the small hole effect when seeing nearby.

And the both-sided aspherical type gradual change focal power eyeglass of described variation 2 is added among any of above-mentioned three kinds of structures,

Described first refractive surface is with by the described surfaces of revolution that meridian is a bus with number of degrees measuring position F1 far away, described second refractive surface is to be boundary and the left and right sides is asymmetric with the meridian with number of degrees measuring position F2 far away by this second refractive surface, and the nearly configuration of this second refractive surface with number of degrees measuring position N2 be only with predetermined distance inwardly near nasal side, eye is corresponding to the small hole effect when seeing nearby.

And the both-sided aspherical type gradual change focal power eyeglass of described variation 2 is added among any of above-mentioned four kinds of structures,

Not that just circle has the power variation of regulation by described horizontal direction section curve with number of degrees measuring position F1 far away in described first refractive surface, and the section curve that comprises the vertical direction section of optional position normal on this horizontal direction section curve comes down to identical with described by the meridian with number of degrees measuring position F1 far away in fact.

And the both-sided aspherical type gradual change focal power eyeglass of described variation 2 is added among any of above-mentioned five kinds of structures,

At the number of degrees (Df) and the adding number of degrees (ADD) used far away that described first and second refractive surfaces given altogether according to prescription values, and, give prism power (Pf) as required, on the basis of such structure, to wearing with can not quadrature by sight line and eyeglass face under the state and cause the astigmatism and the number of degrees error of generation, and any or all of the image distortion that produces in peripheral visual field reduces.

And give the design techniques of prism power (Pf) as required, it is known for example opening in the flat 2003-121801 grade the spy, and this method for designing also can be used in combination.

The both-sided aspherical type gradual change focal power eyeglass of the variation 2 with said structure is described on one side with reference to accompanying drawing on one side.

What Figure 57 represented is the object side surface of variation 2 both-sided aspherical type gradual change focal power eyeglasses, i.e. first refractive surface.This explanation is being called meridian with pass through far of representing of white circle with the longitudinal profile curve (solid line) of number of degrees measuring position F1 among Fig. 5, and this is " by a meridian of using number of degrees measuring position F1 far away " that " means that are used for solving problem " described the 3rd～the 5th structure etc. is remembered.And what dot is the horizontal cross-section curve.

Figure 58 sees the meridianal figure that Figure 57 represents with solid line from the eyeglass side.Figure 58 has from eyeglass top to below radius-of-curvature interval decrescence, and expression gives the surperficial power variation of so-called gradual change.O1 represents center of curvature point, and dot-and-dash line is represented the turning axle by O1.

Figure 59 is the figure that sees the horizontal cross-section curve that Figure 57 dots from the eyeglass top, and O1 represents the center of curvature point of this horizontal cross-section curve.That is the horizontal cross-section curve that, dots among Figure 59 is a circular arc.At this, the first drawn refractive surface is to make the meridian shown in Figure 58 around being that center rotation just can obtain with the turning axle by O1 among Figure 57.

In addition, the horizontal cross-section curve of this variation 2 first refractive surfaces only is the form of Figure 59 not necessarily, and also can be the form shown in Figure 60～Figure 62, below describes.At this, Figure 60 is first variation of the horizontal cross-section curve seen from eyeglass shown in Figure 59 top, Figure 61 is second variation of the horizontal cross-section curve seen from eyeglass shown in Figure 59 top, and Figure 62 is the 3rd variation of the horizontal cross-section curve seen from the top of eyeglass shown in Figure 59.

Figure 60 is that expression is along with leaving and the example of the horizontal cross-section curve that radius-of-curvature reduces to the side from F1.

Figure 61 is then opposite with Figure 60, is that expression is along with leaving and the example of the horizontal cross-section curve that radius-of-curvature increases to the side from F1.

Figure 62 represents is the example of example the two and the horizontal cross-section curve deposited of Figure 60 and Figure 61.

Under the situation of having taked form shown in these Figure 60～Figure 62, also can add acting in second refractive surface of offsetting of the influence of the power variation that changes by the radius-of-curvature of these horizontal cross-section curves and cause.

Its objective is the variation of the shape multiplying power that is to utilize the picture of seeing by eyeglass, is suitable can control along the shape multiplying power of horizontal cross-section curve for the wearer.Particularly, can control the shape multiplying power of wearing time spent nasal side and ear side by adopting the form of Figure 62.

Simple in order to illustrate, form shown in Figure 60～Figure 62 is only to have lifted along with leaving and the dull example that reduces or increase of radius-of-curvature to the side from F1, but increases, has indeclinable interval after reducing, can be considered the various variation such as form families of their inversionizations.

(variation 3)

Different at this with said structure, with reference to accompanying drawing the example of both-sided aspherical type gradual change focal power eyeglass with scanning plane on one side be described on one side.

Figure 63 and Figure 64 are the figure that the average number of degrees of surperficial astigmatism distribution and surface of the variation 3 eyeglass object side surface (first face) of expression embodiment distribute.The labeling method of accompanying drawing is identical with the figure that the average number of degrees of expression lens surface astigmatism distribution or surface such as described Figure 41 and Figure 42 distribute.This eyeglass face ought be set at DHf, DVf to lateral surfaces focal power and the vertical surperficial focal power with number of degrees measuring position F1 far away respectively, nearly lateral surfaces focal power and vertical surperficial focal power when being set at DHn, DVn with number of degrees measuring position N1, has the characteristic of DHf=DVf=4.87, DHn=6.12, DVn=7.87 respectively.And this eyeglass be far be 0.00, add the number of degrees (ADD) with portion's number of degrees be+3.00 last flat eyeglass.The object side surface of this eyeglass (first face) be not scanning plane situation from DHf＜＜DVn also can understand.And the value of DVn-DHn=7.87-6.12=1.75 is lacked than adding the number of degrees, adds 50% of the number of degrees but surpass, and can obtain effect of the present invention.

The purpose that DHn is made the curve darker than DHf is dark when just far using the number of degrees in order to prevent from will to make in the object side surface (first face) of using this eyeglass like this, and the eyeball side surface of this eyeglass (second face) becomes convex shape and whole eyeglass has not been the meniscus shape.

Figure 65 and Figure 66 are the figure that the average number of degrees of surperficial astigmatism distribution and surface of the variation 3 eyeglass eyeball side surfaces (second face) of the described embodiment of expression distribute.The labeling method of accompanying drawing is identical with the figure that the average number of degrees of expression lens surface astigmatism distribution or surface such as described Figure 45 and Figure 46 distribute.

Definition as the present invention's " adding number of degrees of regulation ", following these situations are arranged as shown in Figure 6: far away in object side surface of the peristome of lens inspection meter contact with number of degrees measuring position F1 and the nearly situation of measuring difference in power with N1 place, number of degrees measuring position, in addition far away at the eyeball side surface of the peristome of dioptometer contact with number of degrees measuring position F2 and the nearly situation of measuring difference in power with N2 place, number of degrees measuring position, the peristome of dioptometer contact the focal power of measuring with F2 place, number of degrees measuring position far away of eyeball side surface be that the center rotates and gets poor situation towards near with number of degrees measuring position N2 and in the focal power of N3 place measurement with eyeball rotation center position, as each focal power and the situation of special only usage level direction focal power composition etc. also can adopt any definition in their.

Claims

1, a kind of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

And nearly lateral surfaces focal power and vertical surperficial focal power when being set at DHn, DVn with number of degrees measuring position N1 in described first refractive surface, satisfy following relational expression respectively:

DHf+DHn＜DVf+DVn, and DHn＜DVn

And, the F1 of described first refractive surface and the surperficial astigmatism composition among the N1 are offset at described second refractive surface, described first and second refractive surfaces are given to use number of degrees Df and add number of degrees ADD according to the far away of prescription values altogether,

2, both-sided aspherical type gradual change focal power eyeglass as claimed in claim 1 is characterized in that,

3, a kind of method for designing of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DHf+DHn＜DVf+DVn, and DHn＜DVn

4, the method for designing of both-sided aspherical type gradual change focal power eyeglass as claimed in claim 3 is characterized in that,

5, a kind of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DHf+DHn＜DVf+DVn, and DHn＜DVn

6, both-sided aspherical type gradual change focal power eyeglass as claimed in claim 5 is characterized in that,

Described both-sided aspherical type gradual change focal power eyeglass closely is configured at nasal side close and thin in the temples side with the distribution of the average number of degrees of transmission in the portion.

7, a kind of method for designing of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

In respectively described first refractive surface far away with number of degrees measuring position F1 the lateral surfaces focal power and vertical surperficial focal power to establish enough be DHf, DVf,

DHf+DHn＜DVf+DVn, and DHn＜DVn

8, the method for designing of both-sided aspherical type gradual change focal power eyeglass as claimed in claim 7 is characterized in that,

9, a kind of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DVn-DHn〉ADD/2, wherein, ADD is the adding number of degrees,

And, the surperficial astigmatism composition of the N1 of described first refractive surface is offset at described second refractive surface, give the nearly number of degrees Dn that uses described first and second refractive surfaces altogether according to prescription values.

10, both-sided aspherical type gradual change focal power eyeglass as claimed in claim 9 is characterized in that,

DHf+DHn＜DVf+DVn, and DVn-DHn〉ADD/2 and

DHn-DHf<ADD/2

And, the F1 of described first refractive surface and the surperficial astigmatism composition among the N1 are offset at described second refractive surface, described first and second refractive surfaces are given to use number of degrees Df and add number of degrees ADD according to the far away of prescription values altogether.

11, as claim 9 or 10 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

12, as claim 9 or 10 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

13, as claim 9 or 10 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

In described first refractive surface, by described horizontal direction section curve with number of degrees measuring position F1 far away is not just round power variation with regulation, and the section curve that comprises the vertical direction section of optional position normal on this horizontal direction section curve, with described be identical by the meridian with number of degrees measuring position F1 far away.

14, as claim 9 or 10 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

At number of degrees Df and the adding number of degrees ADD of using far away that described first and second refractive surfaces is given altogether according to prescription values, and, on the basis of the structure that gives prism power Pf as required, to by in that wear can not quadrature and cause the astigmatism or the number of degrees error of generation with the sight line under the state and eyeglass face, and the carrying out aspheric surface more than or equal to a kind of project at least and proofread and correct of the image distortion that produces in peripheral visual field.

15, a kind of method for designing of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DVn-DHn〉ADD/2, wherein, ADD is the adding number of degrees,

16, the method for designing of both-sided aspherical type gradual change focal power eyeglass as claimed in claim 15 is characterized in that,

DHf+DHn＜DVf+DVn, and DVn-DHn〉ADD/2 and

DHn-DHf<ADD/2

17, as the method for designing of claim 15 or 16 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

18, as the method for designing of claim 15 or 16 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

19, as the method for designing of claim 15 or 16 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

20, as the method for designing of claim 15 or 16 described both-sided aspherical type gradual change focal power eyeglasses, it is characterized in that,

At number of degrees Df and the adding number of degrees ADD of using far away that described first and second refractive surfaces is given altogether according to prescription values, and, give structure technical of prism power Pf as required, to by in that wear can not quadrature and cause the astigmatism or the number of degrees error of generation with the sight line under the state and eyeglass face, and the carrying out aspheric surface more than or equal to a kind of project at least and proofread and correct of the image distortion that produces in peripheral visual field.

21, a kind of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DVn-DHf>ADD/2

And, the F1 of described first refractive surface and the surperficial astigmatism composition among the N1 are offset at described second refractive surface, give adding number of degrees ADD described first and second refractive surfaces altogether according to prescription values,

The differential value of the surface longitudinal section number of degrees in described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value.

22, a kind of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DVn-DHf>ADD/2

The differential value of the astigmatism amount in the surface of described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value,

And, any position in described rectangle,

The differential value of the average number of degrees in surface in described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value.

23, a kind of method for designing of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DVn-DHf>ADD/2

24, a kind of method for designing of both-sided aspherical type gradual change focal power eyeglass, it has the gradual change focal power effect of cutting apart distribution on second refractive surface of first refractive surface of object side surface and eyeball side surface, it is characterized in that,

DVn-DHf>ADD/2

The differential value of the surperficial astigmatism amount of described first refractive surface is that the absolute value of vertical differential value is bigger than the absolute value of horizontal differential value,

And, any position in described rectangle,