CN1925965A - Method for designing mold, mold, and molded product - Google Patents

Abstract

A mold is prepared in which the use surfaces of the upper and lower molds are the design curved surfaces of an optical lens having a spherical shape. The curved surface shape of the optical lens formed using this mold is measured. The measurement values are approximated to a formula (1) of aspherical surface, and the curved surface of the molded optical lens is specified as an aspherical surface. Information on the error between the specified curved surface of the optical lens and the design curved surface is recorded as correction information in a database for each characteristic of the optical lens. Using the correction information recorded in the database, the design values of the use surfaces of the upper and lower molds for molding the optical lens having an aspherical curved surface are corrected thereby to design an optical lens.

Description

The method for designing of finishing die, finishing die and formed products

Technical field

The present invention relates to proofread and correct the change of shape of this formed products from finishing die shaping formed products (for example optical lens) time and design finishing die method for designing, the finishing die that designs by this finishing die method for designing and the formed products that passes through this finishing die formed thereby of finishing die of the formed products of the desired shape that can be shaped.

Background technology

When the shaping optical lens, be used for being designed to shape mould and manufacturing if the design load of optical lens intactly made in finishing die, then can not manufacture the shape identical by the optical lens of this finishing die manufacturing sometimes with its design load.Its reason is owing to shaping contraction that depends on material or the caused stress of optical lens shape etc., and the forming face of finishing die can not be copied into the cause of lens face accurately.

For example, should the sphere-forming lens, and when using finishing die to form with sphere forming face, the optical lens that is formed sometimes is the face shape that comprises beyond the sphere of aspherical shape.Therefore, consider these factors with regard to needs during finishing die and to the in addition suitable shape correction of finishing die in design.

The correcting value of these finishing die forming faces is difference with the difference of the refracting power of each optical lens, lens material, design curve form, then has complicated tendency by their combination.In order to determine suitable correcting value then to need to the actual distortion of checking that experimentizes of each finishing die.

The prediction of correcting value or quantification are difficult, and what the decision of suitable correcting value needed is skilled.

Concrete operation is that (a) tests shaping to the optical lens of all kinds by this finishing die, (b) measures the error with respect to the optical lens design load.(c) is multiplied by various coefficients and calculates the correcting value of supposition (empirical value) and make the shape mould again on the error of measuring then.(d) use the finishing die of doing again once more optical lens to be tested shaping, (e) measure the form error of optical lens.The optimization of above-mentioned repeatedly (c)～(e) proofread and correct is exactly general gimmick.

But for the optimization operation of carrying out this finishing die shape correction just need be carried out a large amount of shaping tests.Particularly for example be just to need multiple finishing die under the situation of eyeglass.Be that eyeglass must be prepared and the corresponding lens of each glasses wearer's prescription.For example in the eyeglass number of degrees scope corresponding, the summit refracting power scope of spherical degree is set at-8.00 diopter (D)～+ 6.00 diopters (D) with prescription, and the cutting apart under the situation that unit is set at the 0.25D spacing of refracting power, then the kind of spherical degree has 56 kinds.

When the astigmatic refracting power corresponding with astigmatic prescription was set at 0.25 diopter (D)～2.00 diopter (D) scope, during the cutting apart unit and be set at the 0.25D spacing of refracting power, then San Guang kind needed 8 kinds.Therefore if sphere prescription and astigmatic prescription combination, then just need corresponding 448 kinds the lens number of degrees for goods, and because finishing die is to be made of two moulds up and down, so all just become 896 kinds.

Therefore, in the making of finishing die, need follow describedly like that needs many fabrication cycles to the shape correction operation of each mould.

On the other hand, about being added in having that bearing calibration on the finishing die forming face knows:, and the curvature of this spherical shape is made the method (first prior art) that is used for being corrected into the shape mould as average curvature for the error of the optical lens that makes shaping and this optical lens design load becomes minimum and the spherical shape that uses least square method to ask to have single curvature.

Also have under the situation of simple shape as second prior art, can predict and consider the distortion of shrinking, and the method (patent documentation 1) that this predicted value is suitable for as correcting value.

And also have by aspheric surface mensuration machine as the 3rd prior art and to measure three-dimensional shape and to obtain form error with design load, and according to having eliminated the method (patent documentation 2) that the form error measured value of the specification error of analyzer is proofreaied and correct.

Patent documentation 1: the spy opens flat 2003-117925 communique

Patent documentation 2: the spy opens flat 8-216272 communique

But the error assessment to average curvature in first prior art can not be estimated the form error beyond the spherical shape, therefore can not proofread and correct this spherical shape form error in addition.

When using second prior art design optical lens finishing die, for example has the meniscus shape that constitutes by convex surface and concave surface in that the situation that is eyeglass is next, because it is complex-shaped, so prediction has considered that it is difficult that the deflection that shrinks designs finishing die.

Although the 3rd prior art has been eliminated evaluated error, the form error measured value also includes the lens surface roughness and attached to the interference of the influence of foreign matter on the lens surface etc.Therefore, the interference beyond the form error just is reflected in the correcting value, and correction accuracy is low, has from finishing die can not high accuracy be shaped the worry of optical lens.

Summary of the invention

The present invention has considered above-mentioned situation and has developed, purpose is to provide the method for designing of a kind of finishing die and its finishing die, the warpage of its this formed products when proofreading and correct from finishing die shaping formed products of this finishing die and effectively to design the shaping curved surface be the desired shape formed products of aspheric surface.

Other purposes of the present invention are to provide the formed products that has used described finishing die.

The finishing die method for designing of a first aspect of the present invention is, preparation is formed on the finishing die on the spherical shape design curved surface of formed products, mensuration is by the curve form of the formed products of this finishing die shaping, the described design curved surface of the curved surface of determined described formed products and described formed products is compared the error of obtaining two curved surfaces, the specific information corresponding with this error and be the control information that the formed products of spherical shape forms as being used for curved surface, to use the described control information of the formed products that is fit to have this aspherical shape curved surface to proofread and correct curved surface be the design load of the finishing die forming face that forms of the formed products of aspherical shape and design forming face.

The finishing die method for designing of a second aspect of the present invention is in the invention of a first aspect of the present invention record, the described control information that is suitable for having the formed products of aspherical shape curved surface is following control information, promptly, the curved surface that is shaped is identical lens material with the aspherical shape formed products, and has the control information of the spherical shape formed products design curved surface of the consistent radius of curvature of mean radius of curvature that designs whole of curved surface with vertex curvature radius or this formed products aspherical shape of described formed products aspherical shape design curved surface.

The finishing die method for designing of a third aspect of the present invention is, preparation is formed on the finishing die on the formed products spherical shape design curved surface, mensuration is by the curve form of the formed products of this finishing die shaping, making this measured value be similar to the aspheric surface formula also carries out the curved surface of described formed products specific as aspheric surface, and comparing the error of obtaining two curved surfaces by the curved surface of the specific described formed products of aspheric surface formula and the described design curved surface of described formed products, is the information corresponding with this error the control information that the formed products of spherical shape forms as being used for curved surface, and the property databaseization of each this formed products, use this by data base system control information proofread and correct the shaping curved surface be the final formed products of aspherical shape the finishing die forming face design load and design forming face.

The finishing die method for designing of a fourth aspect of the present invention is in the invention of a third aspect of the present invention record, and described aspheric surface formula comprises the multinomial of composition beyond the spherical shape of the spherical shape composition of formed products curved surface and formed products curved surface.

The finishing die method for designing of a fifth aspect of the present invention be the of the present invention the 3rd or the invention of fourth aspect record in, described aspheric surface formula is composition addition beyond the spherical shape of the spherical shape composition of formed products curved surface and formed products curved surface.

The finishing die method for designing of a sixth aspect of the present invention is in the invention of each record aspect the of the present invention the 3rd to the 5th, described aspheric surface formula Z is set at from the summit of formed products along the distance of the axial measurement of this formed products, X, Y be set at from described summit along and described axle vertical direction measure apart from the time, ρ is set at ρ ²=X ²+ Y ², when R is set at vertex curvature radius, vertex curvature C be set at C=1/R, K be set at the constant of the cone, A _2iWhen being set at asphericity coefficient (i is an integer), be following formula (1).

[formula 1]

$Z=\frac{{\mathrm{C\&rho;}}^2}{1+\sqrt{1-(1+K){\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="A20058000633000391.png,A20058000633000401.png"\; state="\{\{state\}\}">C</figure-callout>}}^2{\mathrm{\&rho;}}^2}}+\underset{i=2}{\overset{n}{\mathrm{\&Sigma;}}}{A}_{2i}{\mathrm{\&rho;}}^{2i}---\left(1\right)$

The finishing die method for designing of a seventh aspect of the present invention is in the invention of a sixth aspect of the present invention record, for corresponding with the error of the formed products curved surface spherical shape composition that is shaped, and first (K=0) by described formula (1) to be benchmark sphere composition obtain the global shape control information that the forming face global shape of the finishing die that forms is proofreaied and correct on formed products spherical shape design curved surface, and for corresponding with the error of composition beyond the formed products curved surface spherical shape that is shaped, and by described formula (1) second is that multinomial becomes to assign to obtain the local shape control information that the described forming face local shape of the described finishing die that forms is proofreaied and correct on formed products spherical shape design curved surface, and each of these each control informations separated independence, each characteristic that has the described formed products of spherical shape by the design curved surface is carried out data base system.

The finishing die method for designing of a eighth aspect of the present invention is in the invention of a seventh aspect of the present invention record, and described global shape control information is that first (K=0) according to formula (1) is that the radius of curvature of the represented benchmark sphere of benchmark sphere composition decides with the difference that the formed products spherical shape designs the radius of curvature of curved surface.

The finishing die method for designing of a ninth aspect of the present invention be the of the present invention the 7th or the invention of eight aspect record in, described local shape control information is that second according to use formula (1) is that the change of shape rate that the height (Z value) of composition beyond the formed products curved surface spherical shape of the represented shaping of multinomial composition and height (Z value) that described formed products spherical shape designs curved surface are calculated decides, and described change of shape rate databaseization.

The finishing die method for designing of a tenth aspect of the present invention is in the invention of each record aspect the of the present invention the 3rd to the 9th, and the characteristic of described formed products is that this formed products is the shape of the lens material and the spherical shape design curved surface of optical lens.

The finishing die method for designing of a eleventh aspect of the present invention is in the invention of each record aspect the of the present invention the 3rd to the tenth, is curved surface the design of the described finishing die forming face that forms of the final formed products of aspherical shape, be on the design curved surface of formed products aspherical shape, add with have the formed products of aspherical shape curved surface matched by data base system global shape control information and local shape correction information, implement like this.

The finishing die method for designing of a twelveth aspect of the present invention is in the invention of a eleventh aspect of the present invention record, with the final formed products with aspherical shape curved surface matched by data base system described global shape control information and described local shape control information, be to be identical lens material with the aspherical shape formed products about the curved surface that will be shaped, and design curved surface for the spherical shape formed products that has with the consistent radius of curvature of described formed products aspherical shape design mean curvature of surface radius, by data base system global shape control information and local shape correction information.

The finishing die of a thirteenth aspect of the present invention is formed by the finishing die method for designing of implementing the first to the 12 each record of aspect of the present invention.

The formed products of a fourteenth aspect of the present invention is to use the finishing die of a thirteenth aspect of the present invention record and is formed.

The formed products of a fifteenth aspect of the present invention is that the formed products of putting down in writing in a fourteenth aspect of the present invention is the eyeglass of meniscus shape.

Of the present invention first or the invention of second aspect record, the specific information corresponding and control information that curved surface is used to form as the spherical shape formed products with the formed products curved surface of measuring and the error of the design curved surface of this formed products spherical shape, is curved surface the design load of the finishing die forming face that forms of the formed products of aspherical shape, uses the described control information of the formed products that is fit to have this aspherical shape curved surface to proofread and correct and design.Therefore, be suitable for having the control information of the formed products of aspherical shape curved surface by use, just can determine at short notice to proofread and correct curved surface is the control information of the finishing die forming face design load that forms of the formed products of aspherical shape.Consequently can high efficiency design be curved surface the forming face of the finishing die that forms of the formed products of aspheric surface desirable shape.

Invention according to the 3rd to the 6th aspect of the present invention, the tenth to the 12 each record of aspect, be formed in finishing die on the formed products spherical shape design curved surface formed products that is shaped from forming face, and measure the curve form of this formed products, make this measured value be similar to the aspheric surface formula, and carry out the curved surface of this formed products that is formed specific as aspheric surface.So just can be not only the sphere composition in the curve form of the formed products that is formed, and the composition beyond the sphere also is similar to the aspheric surface formula and carries out quantification specific.Therefore, become the error of the specific described formed products curved surface of aspheric surface and this formed products spherical shape design curved surface just the composition beyond spherical shape composition and the spherical shape correctly to be taken into, the control information corresponding with this error is also correct.

And owing to make the measured value of the formed products curve form that is formed be similar to the aspheric surface formula, and it is specific that the curve form of this formed products is carried out quantification as aspheric surface, so can be being included in the evaluated error in the measured value or the ELIMINATION OF ITS INTERFERENCE such as surface roughness of formed products curved surface, and only take out the surface configuration of the formed products curved surface that is formed.

And be the control information that the formed products of spherical shape forms by the corresponding information of the curved surface of the specific described formed products of aspheric surface formula and the error of the spherical shape design curved surface of this formed products as being used for curved surface, and carry out data base system by the characteristic of each this formed products.Use this by data base system control information to proofread and correct and design curved surface be the design load of the finishing die forming face that forms of the formed products of aspherical shape.Therefore, by being taken out, the control information of the formed products that is suitable for having the aspherical shape curved surface just can determine that correction is the control information of the finishing die forming face design load that forms of the formed products of aspherical shape at short notice from database to curved surface.

These results be can high efficiency design be curved surface the forming face of the finishing die that forms of the formed products of aspheric surface desirable shape.

Invention according to the 7th to the 9th each record of aspect of the present invention, for corresponding with the error (error of average surface refracting power) of the formed products curved surface spherical shape composition that is shaped, and first (K=0) of through type (1) to be benchmark sphere composition obtain the global shape control information that the forming face global shape of the finishing die that forms is proofreaied and correct on formed products spherical shape design curved surface.For corresponding with the error of composition beyond the formed products curved surface spherical shape that is shaped, and by described formula (1) second is that multinomial becomes to assign to obtain the local shape control information that the described forming face local shape that designs the described finishing die that forms on the curved surface at the formed products spherical shape is proofreaied and correct.By global shape control information and local shape correction information separated are obtained independently, just can reflect control information to the error of the formed products that is formed (error of composition beyond the sum of errors spherical shape of spherical shape composition) accurately and implement the forming face that appropriate correction designs formed products like this.

Invention according to the 13 to the 15 aspect of the present invention record, under the situation that even this formed products is out of shape when the formed products that from finishing die is aspherical shape to curved surface forms, by take out suitable control information from database, also can design curved surface expeditiously is the finishing die that the formed products of aspheric surface desirable shape forms.Therefore, can be curved surface that the formed products of aspheric surface desirable shape forms expeditiously by this finishing die.

Description of drawings

Fig. 1 represents to implement first embodiment in the finishing die method for designing of the present invention and the sectional side view of the finishing die with mo(u)ld top half mould and mo(u)ld bottom half mould made;

Fig. 2 is the sectional side view of expression mo(u)ld bottom half mould;

Fig. 3 is the flow chart that optical lens (plastic lens) manufacturing sequence of Fig. 1 finishing die has been used in expression;

Fig. 4 is the flow chart of expression mo(u)ld top half mould and mo(u)ld bottom half mould manufacturing sequence;

Fig. 5 is that the formed products of tested shaping is the shaping curved surface 21 of optical lens and the curve of design curved surface 20 grades by Fig. 1 finishing die in expression;

Fig. 6 is the curve that the departure that the multinomial composition in the optical lens shaping curved surface 21 that test is shaped and through type (1) is specific departs from respect to the benchmark sphere composition (curve form 22) of Fig. 5 is represented in each position of this optical lens;

Fig. 7 is illustrated in the skeleton diagram of calculating global shape control information and local shape correction information in the design sequence of mo(u)ld top half mould and mo(u)ld bottom half mould;

Fig. 8 is the mo(u)ld top half mould of concrete presentation graphs 1 and the flow chart of mo(u)ld bottom half mould design sequence;

Fig. 9 (A) is that the finishing die of expression by Fig. 1 duplicates and the front elevation of the copy flag that forms on the optical lens curved surface, Fig. 9 (B) is the partial enlarged drawing of the summit copy flag of presentation graphs 9 (A), and Fig. 9 (C) is the partial enlarged drawing of the periphery copy flag of presentation graphs 9 (A).

Figure 10 represents for the design form error that curved surface had the shaping curved surface of formed products optical lens with each position on this optical lens, Figure 10 (A) is to use the curve of the optical lens situation that forms by the designed finishing die of the method for designing of the first embodiment finishing die, and Figure 10 (B) is a curve of proofreading and correct the optical lens situation that the finishing die that designs forms by the average curvature of using first prior art;

Figure 11 be among second embodiment that is illustrated in the finishing die method for designing of the present invention employed by data base system the part of local shape control information be the curve of change of shape rate;

Figure 12 be among second embodiment that is illustrated in the finishing die method for designing of the present invention employed by data base system the curve of global shape control information.

Symbol description

10 finishing dies, 11 mo(u)ld top half moulds, 12 mo(u)ld bottom half moulds

16 use faces (forming face), 20 design curved surfaces, 21 shaping curved surfaces

22,23 curve forms, 30 optical lenses, 31 curved surfaces

32 copy flag, 33 summit copy flag 34A, 34B periphery copy flag

A _2iAsphericity coefficient B _2iCoefficient C vertex curvature

Ro design vertex curvature radius R vertex curvature radius O summit

The P optical axis

The specific embodiment

Embodiments of the invention below are described with reference to the accompanying drawings.

[A] first embodiment (Fig. 1～Figure 10)

Fig. 1 represents to implement first embodiment in the finishing die method for designing of the present invention and the sectional side view of the finishing die with mo(u)ld top half mould and mo(u)ld bottom half mould made.Fig. 5 is that the formed products of expression tested shaping by Fig. 1 finishing die is the shaping curved surface of optical lens and the curve of design curved surface etc.Fig. 7 is the skeleton diagram of calculating global shape control information and local shape correction information in the design sequence of mo(u)ld top half mould and mo(u)ld bottom half mould of presentation graphs 1.

(the lens manufacturing explanation of shaping casting mold structure)

Finishing die 10 shown in Figure 1 forms plastics system spherical lens by the method for making that is called casting, and has the structure of mo(u)ld top half mould 11, mo(u)ld bottom half mould 12 and seal 13.Described mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 are generically and collectively referred to as the lens master mold.

Seal 13 is the drums that formed by the rubber-like resin, mo(u)ld top half mould 11 with mo(u)ld bottom half mould 12 leaves predetermined distance and be that liquid thickly remains on the inner peripheral surface.Surrounded by these mo(u)ld top half moulds 11, mo(u)ld bottom half mould 12 and seal 13 and constitute die cavity 14.Be wholely set the injection portion 15 that the monomer of the raw material of optical lens is injected that is useful on the seal 13 in this die cavity 14.The height of seal 13 is set to can guarantee that formed products is the size of optical lens periphery thickness.

Mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 are made of glass etc.Mo(u)ld top half mould 11 is formed in order to form the concave surface mould of optical lens curved surface (convex surface).Mo(u)ld bottom half mould 12 is formed in order to form the convex surface mould of optical lens curved surface (concave surface).Also as shown in Figure 2, in these mo(u)ld top half moulds 11 and mo(u)ld bottom half mould 12, the face that forms the lens curved surface of optical lens is called use face 16, and the face that does not form described lens curved surface is called non-use face 17.

(explanation of optical lens manufacture method)

The manufacturing sequence of the optical lens that uses above-mentioned finishing die 10 is described with reference to Fig. 3.

At first, the raw material of preparation optical lens is monomer (S1).This monomer is a heat reactive resin, and adding catalyst and ultra-violet absorber etc. are in harmonious proportion and use filter to filter (S2) in this resin.

Then mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 are assembled in the seal 13 and finish finishing die 10 (S3).The monomer that is in harmonious proportion as described above is injected in the die cavity 14 of this finishing die 10, and the heating coincidence is cured (S4) in electric furnace.Finish to form the plastic optical lens of shape by the polymerization of monomer in finishing die 10, and optical lens is carried out somatotype (S5) from finishing die 10.

Behind the optical lens somatotype,, implement to be called the heat treated (S6) of annealing in order to eliminate the distortion of the lens inside that produces by polymerization.As middle inspection optical lens is implemented visual examination and projection inspection then.

Optical lens is divided into the product of finishing and semi-finished product (semi-products) in this stage, for semi-finished product, grind second according to prescription.For finishing product, after to be embodied as the dyeing process that obtains colored article, the reinforcement coating operation that prevents to scratch, prevent to reflect usefulness prevent reflect coating operation (S7) and implement final inspection (S8).The product of finishing just become goods (S9) after this final inspection.

Be described in the mo(u)ld top half mould 11 of employed finishing die 10 in the above-mentioned optical lens manufacturing process and the manufacturing sequence of mo(u)ld bottom half mould 12 below with reference to Fig. 4.

Mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 are to obtain by the two sides of the good heavy sheet glass blank of punch process is processed, so at first will prepare this chunk glass (S11).By processing this chunk glass the blemish layer of the stamping surface of chunk glass is eliminated, when use face 16 and non-use face 17 were made the radius of curvature of specified accuracy, the high accuracy that just obtains fine even roughness degree was used face 16 and non-use face 17.The above-mentioned processing of chunk glass is implemented by grinding and grinding.

Grinding process is exactly to use skive in the free form surface milling drum that carries out NC control specifically, the two sides of chunk glass (use face 16 and non-use face 17) is ground to the radius of curvature (S12) of regulation.Form mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 by this grinding from chunk glass.

Grinding step is to use the abrasive disk of having pasted urethanes or felt on the hollow disc of rubber system, and minuteness particles such as cerium oxide, zirconias as grinding agent, the mo(u)ld top half mould 11 that forms by grinding and the two sides of mo(u)ld bottom half mould 12 are ground (S13).Use the mo(u)ld top half mould 11 and the mo(u)ld bottom half mould 12 that in grinding process, produce face 16 and the 17 lip-deep concavo-convex eliminations of non-use face to become transparent (removing sand holes) separately by this grinding step.Further this use face 16 and non-use face 17 are finish-machined to enough surface accuracies effectively then.

Check mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 (S14) behind this grinding step, mark becomes the cryptomorphic marker (S15) of layout figure reference position on use face 16.The optical layout of layout diagrammatic representation optical lens uses when being bumped into circular optical lens in the eye glass frame.This layout figure is marked on the surface of optical lens and can be pruned.

Behind the mark cryptomorphic marker, implement the glass reinforced processing (S16) of science and finish mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 (S17) for mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12.Because this mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 are to make according to the refracting power of optical lens prescription, so need have multiple together in seal 13.

(explanation of die design method)

Narrate the mo(u)ld top half mould 11 of the finishing die of making as described above 10 and the design sequence of mo(u)ld bottom half mould 12 below with reference to Fig. 5 and Fig. 7.

At first prepare formed products, promptly optical lens is tested the finishing die 10 of shaping.The described optical lens that is shaped is that curved surface is the spherical lens of spherical shape.Therefore, the use face 16 as forming face also is formed spherical shape in the mo(u)ld top half mould 11 of finishing die 10 and mo(u)ld bottom half mould 12.At this moment the radius of curvature of the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 is formed to such an extent that equate with the setting value (for example the radius of curvature of the summit refracting power of lens promptly designs vertex curvature radius Ro) of optical lens curved surface.And the curved surface of the optical lens with design vertex curvature radius Ro is called design curved surface 20 (Fig. 5).

Use the finishing die 10 that possesses above-mentioned mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 to implement the test that is shaped then, injection monomer and heated polymerizable are shaped as the optical lens of test formed products in finishing die 10.The curve form of the optical lens of this tested shaping is former thereby can not form spherical shape by thermal contraction of monomer etc.The result that the present inventor discusses with keen determination sees: the main component of the margin of error that the back that is shaped is caused by change of shape can be come approximate representation by the aspheric surface formula of following formula (1) expression.That is, the curve form of the optical lens of test shaping is shaped as the sphere shape in addition that comprises aspherical shape.So, use the surface curve shape of the optical lens of this shaping shapometer to measure (S21 of Fig. 7) as benchmark with copy flag 32 described later (Fig. 9).Use least square method and make this measured value be similar to the aspheric surface formula, it is specific that the curved surface of the optical lens that test is shaped carries out quantification as aspheric surface.

Described aspheric surface formula Z is set at from summit O the distance along optical axis P orientation measurement, X, Y be set at from described summit O along and described optical axis P vertical direction measure apart from the time, ρ is set at ρ ²=X ²+ Y ², when R is set at vertex curvature radius, vertex curvature C be set at C=1/R, K be set at the constant of the cone, A _2iWhen being set at asphericity coefficient (i is an integer), be the following formula (1) of the rotational symmetric aspherical shape of expression.This formula (1) also is called spencer (ス ペ Application サ one) formula.

[formula 2]

$Z=\frac{C{\mathrm{\&rho;}}^2}{1+\sqrt{1-(1+K){\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="A20058000633000391.png,A20058000633000401.png"\; state="\{\{state\}\}">C</figure-callout>}}^2{\mathrm{\&rho;}}^2}}+\underset{i=2}{\overset{n}{\mathrm{\&Sigma;}}}{A}_{2i}{\mathrm{\&rho;}}^{2i}---\left(1\right)$

But in fact above-mentioned formula (1) has been out of shape following formula (2) in order to implement easily to calculate to be to use, the use least square method make the said determination value be similar to formula (2) to carry out quantification specific, calculate the coefficient B of this formula (2) _2i(the vertex curvature C and the asphericity coefficient A that comprise formula (1) _2iCoefficient).At this, B _2iI be integer.

[formula 3]

$Z=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{B}_{2i}{\mathrm{\&rho;}}^{2i}---\left(2\right)$

Is following carrying out from this formula (1) to the distortion of formula (2).Promptly and during first rationalization of wushu (1), then as Q=1+K (K is a constant)

[formula 4]

Subduplicate part is carried out series expansion, then

[formula 5]

$\sqrt{1-\mathrm{<figure-callout\; id="2"\; label="Q\; C"\; filenames="A20058000633000391.png,A20058000633000401.png"\; state="\{\{state\}\}">Q</figure-callout>}{C}^{}{}^2{\mathrm{\&rho;}}^2}=1-\frac{\mathrm{<figure-callout\; id="2"\; label="Q\; C"\; filenames="A20058000633000391.png,A20058000633000401.png"\; state="\{\{state\}\}">Q</figure-callout>}{C}^{}{}^2{\mathrm{\&rho;}}^2}{2}-\frac{Q^2{C}^4{\mathrm{\&rho;}}^4}{8}-\frac{Q^3{\mathrm{<figure-callout\; id="6"\; label="C"\; filenames="A20058000633000401.png"\; state="\{\{state\}\}">C</figure-callout>}}^6{\mathrm{\&rho;}}^6}{16}-\frac{5Q^4{C}^8{\mathrm{\&rho;}}^8}{128}-\frac{7Q^5{\mathrm{<figure-callout\; id="10"\; label="C"\; filenames="A20058000633000311.png,A20058000633000351.png"\; state="\{\{state\}\}">C</figure-callout>}}^{10}{\mathrm{\&rho;}}^{10}}{256}-\&CenterDot;\&CenterDot;\&CenterDot;$

It is updated in the formula (a), then

[formula 6]

$=\frac{C{\mathrm{\&rho;}}^2}{2}+\frac{Q{C}^3{\mathrm{\&rho;}}^4}{8}+\frac{Q^2{\mathrm{<figure-callout\; id="5"\; label="C"\; filenames="A20058000633000321.png,A20058000633000391.png"\; state="\{\{state\}\}">C</figure-callout>}}^5{\mathrm{\&rho;}}^6}{16}+\frac{5Q^3{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="A20058000633000321.png"\; state="\{\{state\}\}">C</figure-callout>}}^7{\mathrm{\&rho;}}^8}{128}+\frac{7Q^4{\mathrm{<figure-callout\; id="9"\; label="C"\; filenames="A20058000633000321.png"\; state="\{\{state\}\}">C</figure-callout>}}^9{\mathrm{\&rho;}}^{10}}{256}+\&CenterDot;\&CenterDot;\&CenterDot;$

It is updated in the formula (1) and concludes as the multinomial of ρ, then above-mentioned formula (1) just can be represented with following formula (2).

[formula 7]

$Z=\left(\frac{C}{2}\right){\mathrm{\&rho;}}^2+(\frac{Q{C}^3}{8}+A_4){\mathrm{\&rho;}}^4+(\frac{Q^2{\mathrm{<figure-callout\; id="5"\; label="C"\; filenames="A20058000633000321.png,A20058000633000391.png"\; state="\{\{state\}\}">C</figure-callout>}}^5}{16}+A_6){\mathrm{\&rho;}}^6+(\frac{5Q^3{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="A20058000633000321.png"\; state="\{\{state\}\}">C</figure-callout>}}^7}{128}+A_8){\mathrm{\&rho;}}^8+\&CenterDot;\&CenterDot;\&CenterDot;=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{B}_{2i}{\mathrm{\&rho;}}^{2i}$

And

[formula 8]

${\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="A20058000633000391.png,A20058000633000401.png"\; state="\{\{state\}\}">B</figure-callout>}}_2=\left(\frac{C}{2}\right),B_4=(\frac{Q{C}^3}{8}+A_4),{\mathrm{<figure-callout\; id="6"\; label="B"\; filenames="A20058000633000401.png"\; state="\{\{state\}\}">B</figure-callout>}}_6=(\frac{Q^2{\mathrm{<figure-callout\; id="5"\; label="C"\; filenames="A20058000633000321.png,A20058000633000391.png"\; state="\{\{state\}\}">C</figure-callout>}}^5}{16}+A_6),$

$B_8=(\frac{5Q^3{\mathrm{<figure-callout\; id="7"\; label="C"\; filenames="A20058000633000321.png"\; state="\{\{state\}\}">C</figure-callout>}}^7}{128}+A_8)---\left(b\right)$

As mentioned above, the measured value according to the optical lens curve form that test is shaped is similar to the coefficient B that formula (2) is calculated _2i, and use above-mentioned formula (b) just the vertex curvature C and the asphericity coefficient A of energy calculating formula (1) _2iLike this, it is specific that the curve form through type (1) of the optical lens that test is shaped carries out quantification.To carry out quantification specific but the measured value that also can make the optical lens curve form that test is shaped directly is similar to formula (1), and obtain the vertex curvature C and the asphericity coefficient A of this formula (1) _2iIn any case, also be that constant of the cone K is set at K=0 (Q=0) when carrying out the quantification of formula (1), first formula as the expression sphere of wushu (1) calculated vertex curvature C, sets i=2,3,4,5 and calculates asphericity coefficient A ₄, A ₆, A ₈, A ₁₀

The curve form of the optical lens that is shaped by the specific test of this formula (1) is represented as the shaping curved surface 21 of Fig. 5.This shaping curved surface 21 is aspherical shape.Symbol 22 expression among this Fig. 5 is by first (K=0) of shaping curved surface 21 Chinese styles (1) of the specific optical lens of formula (1) quantification, that is, and and the curve form of benchmark sphere composition.The inverse of this curve form 22 expression wushu (1) vertex curvature C, that is, vertex curvature radius (R=1/C) is as radius of curvature sphere (benchmark sphere).

And the ZN among Fig. 5 represents by the composition beyond the spherical shape in the shaping curved surface 21 of the specific optical lens of formula (1) quantification, expression be that second of formula (1) is the multinomial composition.The described multinomial composition that this ZN represents becomes error percentage for (1) first benchmark sphere composition of formula like that shown in the symbol 23 of Fig. 6.

Resolve (S22 of Fig. 7) the test shaping and by the data of the specific optical lens of formula (1) quantification then.The vertex curvature C (vertex curvature radius R) and the asphericity coefficient A of use formula (1) in these data are resolved ₄, A ₆, A ₈, A ₁₀When for example the design vertex curvature radius Ro of optical lens design curved surface 20 being set at Ro=532.680mm, use face 16 is formed on mo(u)ld top half mould 11 on the described design curved surface 20 and the finishing die 10 of mo(u)ld bottom half mould 12 forms by having, by the vertex curvature radius R of the shaping curved surface 21 of the specific optical lens of formula (1) quantification (=1/C) be R=489.001mm, and asphericity coefficient A ₄, A ₆, A ₈, A ₁₀As shown in table 1ly set like that.These vertex curvature radius R and asphericity coefficient A ₄, A ₆, A ₈, A ₁₀In resolving, data use.

[table 1]

i	Asphericity coefficient	The asphericity coefficient value
			2	A 4	1.35749160310267×10 -7
3	A 6	-5.09568302053733×10 -11
			4	A 8	-3.82812002603438×10 -15
5	A 10	3.9996422621367×10 -18

(die design method: the error sphere separates with the aspheric surface composition)

In these data were resolved, first the benchmark sphere composition that the optical lens of test shaping is carried out the specific formula of quantification (1) separated disposal independently with second multinomial composition of formula (1).

And prior art is that the sphere composition of form error and aspheric surface composition are proofreaied and correct as one.Therefore, the correction coefficient of form error also is that spherical shape and aspherical shape are suitable for same coefficient.But the correction numerical value of each each lens shape of aftermentioned each shape for the spherical shape of form error and aspherical shape is diverse.For example Figure 12 (b) is the correction numerical value of the concave side of form error spherical shape.This Figure 12 (b) is even the result of expression is the surface configuration of lens to be changed, except a part of shape and the correcting value of concave side sphere composition to express be certain.Figure 12 (a) is the correction numerical value of the convex side of form error spherical shape.Correction number value representation convex side shape shown in this Figure 12 (a) is certain when refracting power 4D is above.That is, to express the correction numerical value at concavo-convex two sides form error when refracting power 4D is above be certain such situation to the global shape corrected value.All refracting poweies are shown is different values to the aspheric surface component list of form error on the other hand, and the shape of form error and corrected value and formed products is tendency not.

But prior art is that the sphere composition of form error and aspheric surface composition are proofreaied and correct integratedly.Therefore becoming all shapes all changes corrected value.But for the form error sphere composition of the above lens shape of refracting power 4D that originally also can not change owing to also change correction, so determining of corrected value is more complicated.The result becomes to manufacture experimently the situation of determining suitable corrected value to each whole finishing dies fully repeatedly.Present embodiment is the sphere composition of form error and aspheric surface component separation, implements appropriate correction by independently obtaining control information, can design finishing die easily.

Promptly, be shaped and by formula (1) quantification in the error of specific optical lens shaping curved surface 21 (Fig. 5) and this optical lens design curved surface 20 in test, the information corresponding with the error of a spherical shape composition use formula (1) first (K=0) is that benchmark sphere composition (shape that the curve form 22 of Fig. 5 is represented) is calculated.And this information shape correction information (S23 of Fig. 7) as a whole.This global shape control information is proofreaied and correct the global shape of use face 16 in the mo(u)ld top half mould 11, mo(u)ld bottom half mould 12 of finishing die 10, eliminates the error of described spherical shape composition.

Be exactly specifically, the optical lens that is shaped is carried out the specific formula of quantification (1) first (K=0) promptly, the poor H of design vertex curvature radius Ro on the Z direction of the vertex curvature radius R of the curve form 22 (benchmark sphere) that benchmark sphere composition is represented and optical lens design curved surface 20 calculates as the error of the spherical shape composition of the optical lens shaping curved surface 21 of shaping.This difference H as a whole shape correction information decide.This global shape control information is that the optical lens that is shaped is for the necessary control information of the refracting power that obtains wishing.

And the optical lens that is shaped carries out (1) first of the specific formula of quantification (K=0), and promptly the vertex curvature radius R of the represented curve form 22 (benchmark sphere) of benchmark sphere composition and the optical lens design vertex curvature radius Ro that designs curved surface 20 has the different and inconsistent situations of shrinkage factor by material.And this shrinkage factor is different for each material.If the difference of these vertex curvature radius R and design vertex curvature radius Ro is below 2D by the face refracting power conversion of aftermentioned formula (3), preferably below 1D, then by using described global shape control information and local shape control information described later just can make desirable shape to the shaping curved surface of formed products (optical lens).

Design in the error of curved surface 20 in the test shaping and by the shaping curved surface 21 of the specific optical lens of formula (1) quantification and this optical lens, it is that multinomial composition (ZN by Fig. 5 represents) is calculated that the information corresponding with the error of composition beyond the spherical shape is used (1) second of formula.And this information as local shape control information (S24 of Fig. 7).The local shape of use face 16 in the mo(u)ld top half mould 11 of this local shape control information correction finishing die 10, the mo(u)ld bottom half mould 12 is eliminated the described spherical shape error of composition in addition.

Be exactly to use and the optical lens that is shaped to be carried out height (Z value) ZN that (1) second of the specific formula of quantification is a composition beyond this represented optical lens shaping curved surface 21 (Fig. 5) spherical shape of multinomial composition and height (Z value) ZM that optical lens designs curved surface 20 calculates the change of shape rate specifically.This change of shape rate is calculated as change of shape rate=ZN/ZM, is to be calculated in the position on the optical lens summit that distance test is shaped.Local shape control information is calculated decision as the value of the height ZM of the optical lens design curved surface 20 that is multiplied by this position on the change of shape rate of the position on distance optical lens summit in this position.

At this, described height ZN is at the represented curve form 22 (benchmark sphere) of (1) first (K=0) benchmark of formula sphere composition and is shaped and by formula (1) in the specific optical lens shaping curved surface 21, with the same position on distance optical lens summit separately the difference of height (Z value) represent.

At last, use the mo(u)ld top half mould 11 that the local shape control information calculate as described above and global shape control information proofreaied and correct and designed finishing die 10, the use face 16 of mo(u)ld bottom half mould 12.

Promptly at first on the Z direction, add on the evaluation and the corresponding local shape control information in this each position installing by everybody of the use face 16 middle distance lens apex of optical lens design curved surface 20 formed mo(u)ld top half moulds 11, mo(u)ld bottom half mould 12.Eliminate in the optical lens shaping curved surface 21 of shaping the error of composition beyond the spherical shape like this.On whole design load of the use face 16 that has been added the mo(u)ld top half mould 11 of local shape control information, mo(u)ld bottom half mould 12, on the Z direction, add global shape control information (difference H) then.Eliminate the error of spherical shape composition in the optical lens shaping curved surface 21 of shaping like this.Proofread and correct like this mo(u)ld top half mould 11, mo(u)ld bottom half mould 12 use face 16 design load and design this use face 16.

The above-mentioned global shape control information that adds also can be only implemented for the design load of the use face 16 of mo(u)ld bottom half mould 12.Its reason is that mo(u)ld bottom half mould 12 is common in various optical lenses, the cause that the quantity of the use face 16 that should proofread and correct is lacked than mo(u)ld top half mould 11.Its reason also have to be considered to make the cause that influences stepless action to this optical lens curved surface (convex surface) by changing radius of curvature by the optical lens curved surface (concave surface) of use face 16 shapings of mo(u)ld bottom half mould 12.

Further specify the design sequence of the use face 16 of proofreading and correct and design mo(u)ld top half mould 11, mo(u)ld bottom half mould 12 as described above with reference to Fig. 8.

Because the use face 16 of mo(u)ld top half mould 11, mo(u)ld bottom half mould 12 must be bigger than the size of the optical lens that is shaped, so be that the curved design value of expanding optical lens is calculated the design load (S31) of use face 16.Make the use face 16 and the design curved surface (design vertex curvature radius Ro) of optical lens equally make mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 according to this design load of calculating, and assembling finishing die 10 (S32).

Injecting monomer then and test the shaping optical lens in the finishing die 10 of assembling, is that benchmark use shapometer is measured the curve form (S33) as the optical lens of formed products with copy flag 32 described later (Fig. 9).This shapometer for example mainly is to use the shape roughness somascope of Tai Lahuo portion pine (テ one テ one ホ Block ソ Application) society's system in the present embodiment, but also can use non-contact 3-D analyzer (for example UA3P of electric society of Panasonic system) etc., there is no particular limitation for determinator.The shape roughness somascope is that ruby or diamond are configured in the front end of measuring son, moves while the sub-front end of mensuration is contacted on lens surface, and surface configuration is measured on the scanning lens surface, and it measures track only is straight line usually.The three-dimensional analyzer is to float the mode that certain small amount is come scanning of a surface by molecular separating force from the mensuration face on the other hand.

Use least square method to make the described measured value of the optical lens that test is shaped be similar to formula (2) then, it is specific and calculate coefficient B that the optical lens curve form of shaping is carried out quantification _2iFurther use formula (b) is according to this coefficient B _2iCalculate formula (1) vertex curvature C and asphericity coefficient A (K=0) ₄, A ₆, A ₈, A ₁₀, it is specific that the optical lens curve form through type (1) that is shaped (K=0) is carried out quantification.

Use described vertex curvature C and asphericity coefficient A then ₄, A ₆, A ₈, A ₁₀, resolve be shaped and by formula (1) quantification the data (S34) of optical lens.At this moment first (K=0) of wushu (1) separates processing independently with second, calculates global shape control information (S35) from first (K=0), calculates local shape control information (S36) from second.

Then the local shape control information of calculating and global shape control information are added on the design load of using face 16 separately by the formed mo(u)ld top half mould 11 of optical lens design curved surface (design vertex curvature radius Ro), mo(u)ld bottom half mould 12, proofread and correct and design this use face 16 (S37).

Carry out the design (S38) of the non-use face 17 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 then.Design load according to use face 16 and non-use face 17 in mo(u)ld top half mould 11 and the mo(u)ld bottom half mould 12 makes the data (S39) that processing machine is used.Select chunk glass then and make the mo(u)ld top half mould 11 and the mo(u)ld bottom half mould 12 of finishing die 10 by grinding machine and grinding machine.

(the formed products ratio of precision of present embodiment and prior art)

The formed products form accuracy of present embodiment is described.

Had as described above the optical lens of finishing die 10 formed therebies of the mo(u)ld top half mould 11 made and mo(u)ld bottom half mould 12, curved surface is the spherical shape of wishing.For example Figure 10 (A) is the form error measurement result the when curved surface of present embodiment formed products is measured with different diametric(al) (both direction of quadrature among the figure).Figure 10 (B) is the form error measurement result the when curved surface of the above-mentioned first prior art formed products is measured with different diametric(al) (both direction of quadrature among the figure).Figure 10 (A) and Figure 10 (B) are the measurement results of formed products that the optical lens of refracting power 5.00D (diopter) is formed by finishing die 10.Transverse axis is represented the distance (mm) apart from lens centre (summit) among Figure 10,0 expression optical lens center of curve central portion.And the longitudinal axis is represented the refracting power margin of error, and 0.00D represents there is not error.Describe the form error amount of the formed products that is shaped by the present embodiment and first prior art in detail according to Figure 10.

The lens central portion at first is described.The lens central portion is as optical centre and the usage frequency height, particular importance.The margin of error of optical lens central part is different significantly, be 0.06D with respect to the margin of error in the present embodiment (Figure 10 (A)), and the margin of error of first prior art (Figure 10 (B)) is 0.18D.Therefore recognize that present embodiment compares with described prior art, precision has improved 3 times.

Lens central portion periphery in addition is described.For the form error of optical lens design curved surface, the formed products of present embodiment is all little in any position of each one of lens when this periphery is measured the optical lens curved surface that is shaped with different diametric(al) (being the both direction of quadrature among the figure).If near the form error of the employed eyeglass of more general eye glass frame external diameter 50mm, then the margin of error of present embodiment is about 0.02D, but first prior art is 0.04D.Therefore recognize that present embodiment compares with described prior art, precision has improved about 2 times.

And it is little and mild to periphery error change amount from lens centre portion that the margin of error of present embodiment is compared with first prior art.Therefore, though also have by the eyeball rotation sight line position from central division towards periphery portion move the few effect of uncomfortable feeling also arranged.

Recognize that from these results the optical lens of finishing die 10 formed therebies of being made by the present embodiment method for designing is and design curved surface shape about equally.And recognize that the optical lens by the finishing die formed thereby of first prior art is the shape that departs from from the design curved surface.

At this, the longitudinal axis among Figure 10 (A) and Figure 10 (B) is represented refracting power error (unit: D (diopter)).This refracting power error is that (unit: m) error is converted into face refracting power P (unit: D (the diopter)) error of the above-mentioned curved surface of this optical lens by following formula (3) the radius of curvature r of expression optical lens curve form.

P＝(n-1)/r (3)

In this formula (3), n is the refractive index of optical lens.And in having the meniscus shape optical lens of convex surface and concave surface, convex surface and concave surface separately the face refracting power with the expression this optical lens refracting power.

(explanation of surface shape measuring)

When the following describes the optical lens curve form of in the step 33 of the step 21 of Fig. 7 and Fig. 8, measuring tested shaping as the copy flag 32 (Fig. 9 (A)) of benchmark.This copy flag 32 is that formed sign (not shown) is the sign that duplicates on the curved surface 31 of the optical lens 30 that is formed on tested shaping on the mo(u)ld top half mould 11 of finishing die and the use face 16 in the mo(u)ld bottom half mould 12.

As understanding from Fig. 9 (B), Fig. 9 (C), this copy flag 32 comprises: summit copy flag portion 33, and it is formed on the curved surface 31 summit O parts of optical lens 30; Periphery copy flag 34A of portion and 34B, it is that the periphery that is formed on described curved surface 31 is formed on the point-symmetric position with respect to described summit O a pair ofly.And described summit copy flag portion 33 comprises: principal vertex copy flag portion 35, and it is formed on the O place, summit of curved surface 31; Secondary summit copy flag portion 36, it separates predetermined distance and radiates and mutually orthogonal and form from this principal vertex copy flag portion 35.

For example principal vertex copy flag portion 35 is circular protrusions of the about 0.5mm of diameter.Periphery copy flag 34A of portion and 34B are the circular protrusions of the about 1mm of diameter.The about 2mm of the secondary summit 36 length S of copy flag portion, be that the about 1mm of spacing distance T between the secondary summit copy flag portion 36 of same linearity, the width dimensions of these secondary summit copy flag portions 36 are rectangle protuberances of several 10 μ m.

The position corresponding with described principal vertex copy flag portion 35, secondary summit copy flag portion 36 and the periphery copy flag 34A of portion and 34B is formed with the recess shapes mark (not shown) of correspondingly-sized on the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12.Like this, described summit copy flag portion 33 (principal vertex copy flag portion 35, secondary summit copy flag portion 36) and the periphery copy flag 34A of portion and 34B just duplicate on the curved surface 31 that is formed on optical lens 30.The mark that duplicates periphery copy flag 34A of portion and 34B is the degree of depth that is cut the several μ m that are processed into the about 1mm of diameter.The mark that duplicates principal vertex copy flag portion 35 is to be cut the following degree of depth of about 0.5 μ m that is processed into the about 0.5mm of diameter.The mark that duplicates secondary summit copy flag portion 36 is processed to form the degree of depth below several μ m of the several 10 μ m of width by ruling.

Duplicate summit copy flag portion 33 (particularly principal vertex copy flag portion 35) and periphery copy flag 34A of portion and 34B on the curved surface 31 that is formed on optical lens 30, be positioned on the same straight line L1 by curved surface 31 summit O.Measure the shapometer of curved surface 31 shapes of optical lens 30 and measure the shape of described curved surface 31 in turn by the periphery copy flag 34A of portion, summit copy flag portion 33 and the periphery copy flag 34B of portion, can correctly measure the shape of this curved surface 31 like this along described straight line L1.Therefore summit copy flag portion 33 (particularly principal vertex copy flag portion 35) and the periphery copy flag 34A of portion and 34B are the positions that is positioned at for the curved surface 31 of measuring optical lens 30.

When shapometer is measured the curved surface 31 of optical lens 30 by the periphery copy flag 34A of portion, summit copy flag portion 33 and the periphery copy flag 34B of portion in turn along straight line L1, because summit copy flag portion 33, the periphery copy flag 34A of portion and 34B have extreme change of shape, so be determined as big interference.Therefore, under the situation of the interference that is not measured to these summit copy flag portions 33, the periphery copy flag 34A of portion and 34B, just know that clearly shapometer is not correctly implemented the measuring shape that the curved surface 31 of optical lens 30 carries out.At this moment adjust the adjusting of optical lens 30, shapometer is measured by the periphery copy flag 34A of portion, summit copy flag portion 33 and the periphery copy flag 34B of portion in turn, deal with like this for shapometer.

The big interference of described measured value that causes by summit copy flag portion 33, the periphery copy flag 34A of portion and 34B, can be easily not to measured value nearby with influence be excluded.Use least square method to make described measured value be similar to aspheric surface formula (1) or formula (2) then as previously mentioned, so the influence that measured value is disturbed has not had fully.The evaluated error of summit copy flag portion 33, the periphery copy flag 34A of portion and 34B is because the periphery copy flag 34A of portion and 34B are the circles of the about 1mm of diameter, so be in about 0.5mm for this periphery copy flag 34A of portion and 34B.Because the principal vertex copy flag portion 35 of summit copy flag portion 33 is circles of the about 0.5mm of diameter, so be in about 0.25mm for this principal vertex copy flag portion 35.

Periphery copy flag 34A of portion and 34B be not limited to be for the curved surface 31 summit O point symmetries of optical lens 30 be provided with a pair of, also can be provided with how right.For example also can be on the straight line L2 that has rotated predetermined angular (for example 90 degree) for the straight line L1 that comprises periphery copy flag 34A of portion and 34B, it is a pair of that the periphery copy flag 34A of portion on other the periphery copy flag 34A of portion and 34B and the straight line L1 and 34B are come together to duplicate formation.Shapometer just can correctly be measured the curved surface 31 of optical lenses 30 such as for example Tuo Like (ト one リ Star Network) eyeglass on two direction of principal axis of quadrature by measure the curved surface 31 of optical lens 30 on different diametric(al)s along described straight line L1 and L2.

Also can be arranged on copy flag 32 on any direction in the curved surface 31 of optical lens 30, and on this direction, measure the curve form of curved surface 31 by shapometer.

(effect of first embodiment)

By above structure and according to described embodiment following effect (1)～(5) are arranged then.

(1), measure curve form by the optical lens of finishing die 10 formed therebies that possess mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12, make this measured value be similar to the formula (1) of aspheric surface formula and the curved surface of optical lens as aspheric surface and specific.Therefore in the optical lens curve form that is formed, can not only make the sphere composition, and can make composition beyond the sphere be similar to aspheric formula (1) and to carry out quantification specific.Therefore, can correctly be taken into composition beyond spherical shape composition and the spherical shape by the error of the aspheric optical lens curved surface of specific one-tenth and this optical lens design curved surface.Consequently corresponding with described error control information also becomes correct, and the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 designs mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the energy high-precision correction finishing die 10.

(2), make the measured value of the optical lens curve form of shaping be similar to the formula (1) of aspheric surface formula and the curve form of described optical lens is carried out quantification as aspheric surface specific.Therefore, can only select the measured value of optical lens curved surface being included in the evaluated error in the measured value and the ELIMINATION OF ITS INTERFERENCE such as surface roughness of optical lens curved surface.Therefore, the correction of the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the finishing die 10 be can high accuracy implement and mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 designed.

(3), since through type (1) first (K=0) is a benchmark sphere composition come corresponding with the error (average surface refracting power error) of spherical shape composition in the optical lens curved surface that is shaped, so can obtain the global shape control information of use face 16 global shapes of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the correction finishing die 10.And since by (1) second of described formula be multinomial become to assign to the optical lens curved surface that is shaped in spherical shape the error of composition is corresponding in addition, so can obtain the local shape control information of use face 16 local shapes of described mo(u)ld top half mould 11 of correction and mo(u)ld bottom half mould 12.By like this global shape control information and local shape correction information separated being obtained independently and can the error of optical lens (error of composition beyond the sum of errors spherical shape of spherical shape composition) be reflected in the control information accurately, design mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 and implement appropriate correction.

(4), the formula (2) that makes the measured value of measuring the optical lens curve form that is shaped be similar to the aspheric surface formula is come the curved surface of specific described optical lens.Therefore come the situation of particular optical lens curved surface to compare with the use formula (1) that computer is difficult to dispose, it is specific to calculate enforcement easily, can calculate the coefficient B of formula (2) rapidly _2iTherefore, can calculate easily and optical lens distortion (error) corresponding control information, can design the mo(u)ld top half mould 11 and the mo(u)ld bottom half mould 12 of the finishing die 10 of shaping desirable shape optical lens easily.

(5), on the curved surface 31 of optical lens shown in Figure 9 30, duplicate the sign (not shown) on the use face 16 in the mo(u)ld top half mould 11 that is arranged on finishing die 10 and the mo(u)ld bottom half mould 12, and form copy flag 32 (summit copy flag portion 33, the periphery copy flag 34A of portion and 34B).This copy flag 32 is positioned at the position that should measure on the curved surface 31 of optical lens 30.When measuring, measure the shape of the curved surface 31 of described optical lens 30 as benchmark being positioned at the described copy flag 32 that to measure the position from optical lens curve form that finishing die 10 is shaped.Like this, can correctly implement the mensuration of optical lens 30 curve forms.Consequently can make measured value be similar to aspheric formula (1) or formula (2) and the curved surface of optical lens is come specific as aspheric surface, can calculate control information and design the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the finishing die 10 accurately.

[B] second embodiment (Figure 11, Figure 12)

(explanation of control information data base system)

Figure 11 be among second embodiment that is illustrated in the finishing die method for designing of the present invention employed by data base system local shape control information a part promptly, the curve of change of shape rate curve.Figure 12 be among second embodiment that is illustrated in the finishing die method for designing of the present invention employed by data base system the curve of global shape control information.Among this second embodiment, the part identical with described first embodiment then used identical symbol and title and omitted explanation.

This second embodiment is different on below the point for described first embodiment.Be for the finishing die of all kinds implementation step S31～S40 in advance among Fig. 8.At this moment each control information is made into database.After making database, do not carry out step S31～S34 and carry out step S35～S40.

Promptly first embodiment is to be a kind of optical lens to be tested shaping obtain control information (global shape control information, local shape control information) about the lens material of optical lens and design curve form.Directly use this control information to proofread and correct and design the mo(u)ld top half mould 11 and the mo(u)ld bottom half mould 12 of finishing die 10.

Relative therewith, second embodiment carries out pretest to the optical lens lens material as the optical lens characteristic respectively with the different multiple optical lens of design curve form to be shaped, and the control information that at this moment obtains is carried out data base system by each optical lens characteristic.After making database, do not test shaping once more, or only by simple test be shaped with regard to use this by data base system control information proofread and correct and be designed for the design load of use face 16 in the mo(u)ld top half mould 11 of finishing die 10 of a large amount of each optical lenses of production and the mo(u)ld bottom half mould 12.

That is, in this second embodiment for different a plurality of each lens materials of refractive index, the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in a plurality of finishing dies 10 that design forms design curve form different multiple each optical lens.Use a plurality of finishing dies 10 of this design to test the shaping optical lens, and measure curve form for each optical lens that is formed.Similarly make described measured value be similar to formula (2) with the foregoing description and the curve form quantification of each optical lens.At this moment according to the coefficient B of calculating _2iObtain vertex curvature C and asphericity coefficient A _2i(asphericity coefficient A ₄, A ₆, A ₈, A ₁₀), the optical lens specific accepted way of doing sth of each curve form quantification (1) that is shaped.

And similarly each curve form of optical lens that is formed and through type (1) is specific being carried out data with the foregoing description resolves.Obtain separately global shape control information from first (K=0) of formula (1), from second part of obtaining local shape control information of separately formula (1), that is, and the change of shape rate curve.

Figure 11 is when the different a plurality of optical lens of the design curve form that is shaped, and the change of shape rate curve of this each optical lens that is formed is illustrated in the position that begins from the lens apex of optical lens.At this moment the refractive index of the lens material of optical lens is 1.699.Transverse axis is represented the distance (mm) apart from the lens centre among Figure 11,0 expression optical lens center of curve central portion.The longitudinal axis of Figure 11 is represented the change of shape rate, 0% expression shape no change and do not need to proofread and correct.

As Figure 11 as shown in the example like that, the change of shape rate curve of the optical lens that is formed is to calculate by different each lens material of refractive index with by each shape of optical lens design curved surface and by data base system.Symbol a, the b of Figure 11, c, d, e represent be the shape (radius of curvature) of optical lens design curved surface be respectively be equivalent to+shape of 2.00D, be equivalent to 0.00D shape, be equivalent to-shape of 2.00D, be equivalent to-shape of 6.00D, be equivalent to-change of shape rate curve during the shape of 10.00D.

Transverse axis is the face refracting power (D) of expression lens shape among Figure 12, the big and little shape of bending value of the numerical value 1 expression radius of curvature on the transverse axis, and the numerical value 6 expression radius of curvature on the transverse axis are little and shape that bending value is big.The longitudinal axis is the global shape corrected value, and 0D represents the shape no change and do not need to proofread and correct.

When Figure 12 is the different a plurality of optical lens of shaping optical lens design curve form this optical lens global shape control information that is formed and optical lens are designed the relation of curve form, the expression that utilizes curve α, utilizes curve β to carry out respectively at concave surface at convex side.At this moment the lens material refractive index of optical lens is 1.699, has the meniscus shape eyeglass lens of convex surface and concave surface.As Figure 12 as shown in the example like that, the global shape control information of the optical lens that is formed is to calculate by different each lens material of refractive index with by each shape of optical lens design curved surface and by data base system.

Among Figure 11 and Figure 12, the shape (radius of curvature) of optical lens design curved surface is to use described formula (3) and is converted into that face refracting power (unit: D (diopter)) represents.

A large amount of situations of producing the lens material optical lens different with the design curve form are described.At first from being taken out the change of shape rate curve with the relevant optical lens of will mass-produced optical lens identical lens material (refractive index is identical) and identical design curve form as mentioned above the optical lens shape change rate curve of data base system.Be multiplied by the height (Z value) of the optical lens design curved surface of this position then in the value from the optional position that lens apex begins of this change of shape rate curve, calculate the local shape control information of this position.Calculate this local shape control information for all positions of optical lens.Be exactly to be 1.699 specifically in refractive index, curve form is equivalent to-select the change of shape curve d of Figure 11 under the situation of 6.00D.Then the lens design surface height of correspondence and (Z value) are multiplied each other and partial correction information is determined on all positions of optical lens.Similarly, if curve form is equivalent to-10.00D, then select the change of shape rate curve e of Figure 11.

Even but curve form changes if lens material is identical among Figure 11, represents that then the change of shape rate curve is dynamic change.And curve form value-2.00D (the curve c of Figure 11) is littler than the change of shape rate of curve form value-6.00D (the curve d of Figure 11), and the bending value of change of shape rate and curvature shapes is proportional.But curve form value-10.00D (the curve e of Figure 11) is littler and inversely proportional than the change of shape rate of curve form value-2.00D (the curve c of Figure 11).Therefore, the change of shape of this complicated shape of lens is expressed complicated form, and it is difficult that appropriate correction is carried out in understanding in the prior art.

Then from being taken out the global shape control information with the relevant optical lens of will mass-produced optical lens identical lens material (refractive index is identical) and identical design curve form the optical lens global shape control information of data base system.

Even but curve form changes if lens material is identical among Figure 12, then the global shape corrected value is also expressed irregular variation.For example at convex surface, the face refracting power is that global shape corrected value and face refracting power are proportional from 0 to 3D.On the other hand if the face refracting power greater than 4D then the global shape corrected value become necessarily at-0.05D.And except the face refracting power of a part, the global shape corrected value is certain in concave side.Therefore, the change of shape of this complicated shape of lens can not predict that under present situation it is difficult that appropriate correction is carried out in understanding in the prior art.

The mo(u)ld top half mould 11 of finishing die 10 and the use face 16 of mo(u)ld bottom half mould 12 are that design is being thought on the design curved surface of mass-produced optical lens.When mass-produced optical lens, on Z direction separately, adding as described above local shape control information of calculating according to the change of shape rate curve that takes out from database and the global shape control information of taking out on the design load of described use face 16 from database.Proofread and correct like this and calculate and be used for design load that this is thought the use face 16 of the mo(u)ld top half mould 11 of the finishing die 10 that mass-produced optical lens forms and mo(u)ld bottom half mould 12, design the mo(u)ld top half mould 11 and the mo(u)ld bottom half mould 12 of this finishing die 10.

(effect of second embodiment)

According to said structure, described second embodiment except have with the same effect in described first embodiment effect (1)～(5), the effect (6) below also having.

(6), is the part of global shape control information and local shape correction information that the change of shape rate curve separates independently, lens material and the shape databaseization that designs curved surface by each optical lens, and use this each control information to wait the design load of the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the finishing die 10 of proofreading and correct and design shaping by data base system, like this, by from database, taking out the lens material be suitable for optical lens and the global shape control information and the local shape correction information (part of the local shape control information of correctly saying so is the change of shape rate curve) of design curve form, just can unreal testing examination be shaped and determine the design load control information of the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the finishing die 10 at short notice.Consequently can high efficiency the use face 16 of mo(u)ld top half mould 11 and mo(u)ld bottom half mould 12 in the design finishing die 10.

[C] the 3rd embodiment

(explanation of the aspherical shape bearing calibration of spherical correction value)

The 3rd embodiment is being used for of having utilized among described second embodiment by data base system curved surface is the control information (part of global shape control information, local shape control information is the change of shape rate) that the formed products (optical lens) of spherical shape forms, and proofreading and correct and design curved surface is the design load that the forming face of the mo(u)ld top half mould of the finishing die that forms of the formed products (optical lens) of aspherical shape and mo(u)ld bottom half mould is promptly used face.

About being that the global shape control information that forms of the optical lens of spherical shape and the part of local shape correction information are the change of shape rate being used for curved surface, the characteristic that has each optical lens of spherical shape by the design curved surface is carried out the method for data base system, identical with described second embodiment, omit explanation.At this, the characteristic of described optical lens is meant that curved surface is the lens material and the design curve form with spherical shape of this optical lens of spherical shape.

Is curved surface the design of the use face of the mo(u)ld top half mould of the finishing die that forms of the optical lens of aspherical shape and mo(u)ld bottom half mould, at first be from be suitable for having the aspherical shape optical lens and by data base system global shape control information and the part of local shape correction information be that the change of shape rate is taken out.

Promptly, about with the curved surface that will be shaped be the optical lens identical lens material of aspherical shape, and the part by the global shape control information of data base system and local shape correction information that possesses with the optical lens of the vertex curvature radius of this optical lens aspherical shape design curved surface or the spherical shape design curved surface that mean radius of curvature has consistent radius of curvature is that the change of shape rate is taken out from this database.At this, described vertex curvature radius for example is the radius of curvature at place, summit on the optical lens aspherical shape design curved surface that will be shaped.Described mean radius of curvature is meant the mean radius of curvature of whole of lens on the optical lens aspherical shape design curved surface that will be shaped.

(the aspherical shape bearing calibration of spherical correction value: calculate corrected value) from database

For example consider that the curved surface that will be shaped is that the radius of curvature at place, summit is+situation of 2.00D (diopter) on the optical lens design curved surface of aspherical shape.At first be with the optical lens that will be shaped be the identical lens material, and come with reference to this database about the optical lens that possesses with described vertex curvature radius has a spherical shape design curved surface of consistent radius of curvature.For example from global shape control information shown in Figure 12, as a whole shape correction information and in the 2D of the transverse axis " expression convex side lens shape refracting power " of convex side, take out on the α curve this global shape corrected value promptly-0.100D.On the other hand, this global shape corrected value that takes out on the beta curve in the 2D that the transverse axis of concave side " is represented concave side lens shape refracting power " is-0.125D.Similarly from by data base system the part of local shape control information for example shown in Figure 11 be to take out curve a as the change of shape rate the change of shape rate.

Be multiplied by the height (Z value) of the optical lens aspherical shape design curved surface of this position then in the value from the optional position that lens apex begins of the change of shape rate of taking out, calculate the local shape control information of this position.And be that this local shape control information is calculated in all positions of optical lens of aspherical shape for curved surface.

(the aspherical shape bearing calibration of spherical correction value: the addition method of corrected value)

In mo(u)ld top half mould that designs the finishing die on the optical lens aspherical shape that will be shaped design curved surface and mo(u)ld bottom half mould, use on the face design load then, on the Z direction, add as described above local shape control information of calculating according to the change of shape rate of taking out and the global shape control information of taking out from database from database.

For example about local shape control information, curved surface be in the optical lens of aspherical shape in each position, the local shape control information of calculating is designed on the design load of each position of use face of described mo(u)ld top half mould on the aspherical shape design curved surface and mo(u)ld bottom half mould being added on the Z direction.About global shape control information, be the global shape control information of taking out, on the design load on for example summit that is added in described mo(u)ld top half mould designed and mo(u)ld bottom half mould use face on the Z direction by the aspherical shape design load from database.

As mentioned above, correction calculation is curved surface the mo(u)ld top half mould of the finishing die that forms of the optical lens of aspherical shape and the design load of the use face in the mo(u)ld bottom half mould, and designs the mo(u)ld top half mould and the mo(u)ld bottom half mould of this finishing die.

(effect of the 3rd embodiment)

According to above structure, described the 3rd embodiment also has following effect (7) except effect (1)～(5) that described first embodiment is arranged.

(7), being the control information that the optical lens of spherical shape forms as being used for curved surface by the curved surface of the specific described optical lens of the aspheric surface formula information corresponding with the error of this optical lens spherical shape design curved surface, and carry out data base system by the characteristic of each this optical lens.Use this by data base system control information to proofread and correct and design curved surface be the mo(u)ld top half mould of the finishing die that forms of the optical lens of aspherical shape and the design load that the mo(u)ld bottom half mould uses face.Like this, by the control information of the optical lens that is suitable for having the aspherical shape curved surface is taken out from database, be the mo(u)ld top half mould of the finishing die that forms of the optical lens of aspherical shape and the control information that the mo(u)ld bottom half mould uses the face design load with regard to can unreal testing examination being shaped and determining to proofread and correct at short notice curved surface.Consequently can high efficiency design be curved surface the finishing die mo(u)ld top half mould that forms of the optical lens of aspheric surface desirable shape and the use face of mo(u)ld bottom half mould.

Abovely the present invention has been described, but the present invention is not limited thereto according to described each embodiment.

For example present embodiment has been narrated the use casting manufacturing optical lens that is shaped, but also can be suitable for the present invention by the situation that the manufacture method beyond this casting is made optical lens.Exactly plastic lens is carried out under the situation of direct machining and attrition process specifically, just can proofread and correct, milling tool (abrasive disk) shape correction of attrition process and refracting power be suitable in proofreading and correct at the cutting face of grinding shape data.And the present invention can be suitable in the correction of thermal softening finishing die etc.

It is the situation of glass that the foregoing description has been narrated finishing die, but at other high finishing dies of percent thermal shrinkage, for example also can be suitable for the present invention under the situation that metal pattern is shaped.

On the other hand, it is the situation of spherical shape optical lens that the foregoing description has been narrated as test formed products surface, but is the surface that the optical lens of aspherical shape also can be suitable for as the test formed products.

And it is the rotational symmetric optical lens of spherical shape that the foregoing description has been narrated as final formed products surface, or the surface is the situation of the optical lens of aspherical shape, but also can make every effort to overcome the optical lens of face etc. as final formed products having Tuo Like face, Ya Tuo.At this, the Tuo Like face is meant two main warp lines with quadrature, and each main warp line is to be made of spherical shape.And the Tuo Like face is meant that its each main warp line is to be made of aspherical shape.

And the foregoing description has been narrated the curve form as the optical lens surface of formed products has been carried out instrumentation and data parsing on the warp (being diameter) by this optical lens center, resolve but also can on many warps (being diameter), carry out instrumentation and data, calculate their mean value by this optical lens center.

Claims (15)

1, a kind of method for designing of finishing die is characterized in that, the design of its forming face comprises: prepare to be formed on the finishing die on the formed products spherical shape design curved surface,

The curve form of the formed products that mensuration is shaped by this finishing die,

The described design curved surface of the curved surface of determined described formed products and described formed products is compared and obtains the error of two curved surfaces,

The information corresponding with this error specific be the control information that the formed products of spherical shape forms as being used for curved surface,

The described control information that use is fit to have the formed products of this aspherical shape curved surface is proofreaied and correct the design load that curved surface is the finishing die forming face that forms of the formed products of aspherical shape.

2, the method for designing of finishing die as claimed in claim 1, it is characterized in that, the described control information that is suitable for having the formed products of aspherical shape curved surface is following control information, promptly, the curved surface that is shaped is identical lens material with the aspherical shape formed products, and has the control information of the spherical shape formed products design curved surface of the radius of curvature consistent with the mean radius of curvature of whole of the vertex curvature radius of described formed products aspherical shape design curved surface or this formed products aspherical shape design curved surface.

3, a kind of method for designing of finishing die is characterized in that, the design of its forming face comprises: prepare the finishing die on the formed products spherical shape design curved surface,

The curve form of the formed products that mensuration is shaped by this finishing die, make this measured value be similar to the aspheric surface formula and the curved surface of described formed products is carried out as aspheric surface specific,

And the described design curved surface by the curved surface of the specific described formed products of aspheric surface formula and described formed products compared and obtains the error of two curved surfaces,

Is the information corresponding with this error the control information that the formed products of spherical shape forms as being used for curved surface, and the property databaseization of each this formed products,

Use this by data base system control information proofread and correct the design load of forming face that the shaping curved surface is the finishing die of the final formed products of aspherical shape.

4, the method for designing of finishing die as claimed in claim 3 is characterized in that, described aspheric surface formula is the multinomial that comprises composition beyond the spherical shape of the spherical shape composition of formed products curved surface and formed products curved surface.

As the method for designing of claim 3 or 4 described finishing dies, it is characterized in that 5, described aspheric surface formula is composition addition beyond the spherical shape of the spherical shape composition of formed products curved surface and formed products curved surface.

6, as the method for designing of each described finishing die of claim 3 to 5, it is characterized in that, described aspheric surface formula Z is set at from the summit of formed products along the distance of the axial measurement of this formed products, X, Y be set at from described summit along and described axle vertical direction measure apart from the time, ρ is set at ρ ²=X ²+ Y ², when R is set at vertex curvature radius, vertex curvature C be set at C=1/R, K be set at the constant of the cone, A _2iWhen being set at asphericity coefficient (i is an integer), be following formula (1)

[formula 9]

$Z=\frac{{\mathrm{C\&rho;}}^2}{1+\sqrt{1-(1+K)C^2{\mathrm{\&rho;}}^2}}+\underset{i=2}{\overset{n}{\mathrm{\&Sigma;}}}{A}_{2i}{\mathrm{\&rho;}}^{2i}---\left(1\right).$

7, the method for designing of finishing die as claimed in claim 6, it is characterized in that, for corresponding with the error of spherical shape composition in the formed products curved surface that is shaped, and first (K=0) by described formula (1), it is benchmark sphere composition, obtain the global shape control information that the forming face global shape of the finishing die that forms is proofreaied and correct on formed products spherical shape design curved surface

And for corresponding with the error of composition beyond the formed products curved surface spherical shape that is shaped, and by described formula (1) second is the multinomial composition, obtain the local shape control information that the described forming face local shape of the described finishing die that forms is proofreaied and correct on formed products spherical shape design curved surface

And each of these each control informations separated independence, each characteristic that has the described formed products of spherical shape by the design curved surface is carried out data base system.

8, the method for designing of finishing die as claimed in claim 7, it is characterized in that described global shape control information is that first (K=0) according to formula (1) is that the difference of the radius of curvature of the radius of curvature of the benchmark sphere that shows of benchmark sphere component list and formed products spherical shape design curved surface decides.

9, as the method for designing of claim 7 or 8 described finishing dies, it is characterized in that, described local shape control information is that second according to use formula (1) is that the change of shape rate that the height (Z value) of composition beyond the spherical shape of formed products curved surface of the represented shaping of multinomial composition and height (Z value) that described formed products spherical shape designs curved surface are calculated decides, and described change of shape rate databaseization.

As the method for designing of each described finishing die of claim 3 to 9, it is characterized in that 10, the characteristic of described formed products is this formed products, i.e. the shape of the lens material of optical lens and spherical shape design curved surface.

11, as the method for designing of each described finishing die of claim 3 to 10, it is characterized in that, is curved surface the design of the described finishing die forming face that forms of the final formed products of aspherical shape, be by on the design curved surface of formed products aspherical shape, add with the formed products with aspherical shape curved surface matched by data base system global shape control information and local shape correction information implement.

12, the method for designing of finishing die as claimed in claim 11, it is characterized in that, with the final formed products with aspherical shape curved surface matched by data base system described global shape control information and described local shape control information, be to be identical lens material with the aspherical shape formed products about the curved surface that will be shaped, and have design curved surface with the spherical shape formed products of the consistent radius of curvature of described formed products aspherical shape design mean curvature of surface radius and by data base system global shape control information and local shape correction information.

13, a kind of finishing die is characterized in that, it is formed by the finishing die method for designing of implementing each record of claim 1 to 12.

14, a kind of formed products is characterized in that, it is to use the finishing die of claim 13 record and is formed.

15, a kind of formed products is characterized in that, the formed products of record is the eyeglass of meniscus shape in the claim 14.

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