CN105813991B - The manufacturing method of grinding glass optical component blank molding die and grinding glass optical component blank and optical element - Google Patents
The manufacturing method of grinding glass optical component blank molding die and grinding glass optical component blank and optical element Download PDFInfo
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- CN105813991B CN105813991B CN201480066195.8A CN201480066195A CN105813991B CN 105813991 B CN105813991 B CN 105813991B CN 201480066195 A CN201480066195 A CN 201480066195A CN 105813991 B CN105813991 B CN 105813991B
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- molding die
- glass
- membrane
- oxide ceramics
- grinding
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
- C03B11/086—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor of coated dies
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/10—Die base materials
- C03B2215/11—Metals
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/20—Oxide ceramics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The purpose of the present invention is to provide the molding die of the long-life of excellent in te pins of durability a kind of, the molding die is for being pressed and molded the glass raw material softened in air atmosphere and manufacturing grinding glass optical component blank.Molding die of the invention at least has upper die and lower die, the molding die is for being pressed and molded the glass raw material softened in air atmosphere and manufacturing grinding glass optical component blank, wherein, it is 5 μm or more of membrane of oxide ceramics that the forming surface of at least one of described upper die and lower die, which has film thickness,.
Description
Technical field
The present invention relates to grinding glass optical component blank molding die and grinding glass optical component blank with
And the manufacturing method of optical element.
Background technique
In recent years, along with the diversification of optical element and extensiveization, the needs of the optical element of glass system are also
It improves.
Forming method as glass optical components such as optical lenses, it is known to compression molding method, to the glass softened
Glass is molded and forms.If substantially distinguishing this compression molding method, the type method that is molded directly into can be enumerated, reheat compression molding
Method and precise compression molding method (also referred to as mold compression molding method) this 3 kinds of methods.
In these forming methods, being molded directly into type method and reheating compression molding method is following methods, that is, with the short time
The glass raw material softened is pressed and molded, the approximate optical element base of optical element shape as target is formed in
Material, later, be ground/grind and finish as optical element to the optical element blank.On the other hand, precise compression molding
Method is to be formed and by the forming surface shape transfer after Precision Machining to the glass softened in nonoxidizing atmosphere as mesh
The method of target optical element in this method, does not need grinding/grinding of molded product.
Compression molding method is especially reheated, can be pressed and molded in air atmosphere, is set it is not necessary that price is higher
It is standby, therefore it is widely used (patent document 1) all the time.But there are the following problems in the method.
Under normal conditions, it reheats in compression molding, using the molding die being made of metal materials such as cast irons in atmosphere
It is carried out under atmosphere.At this point, the forming surface of molding die is directly contacted with atmosphere or the glass raw material softened in high temperature.Cause
This, the glass ingredient of oxygen or composition glass raw material in atmosphere and the material (metal materials such as cast iron) for constituting forming surface occur
Reaction, is easy to deteriorate forming surface chemically.
In addition, the glass raw material softened is pressed using molding die in reheating compression molding, thus
Form the formed body (grinding glass optical component blank) with defined shape.At this point, the glass softened is warm sometimes
Stick at forming surface.Especially, if reheating compression molding is repeated, the chemically deterioration of forming surface is promoted, therefore has
Promote the hot sticky tendency of the glass in forming surface.
The hot sticky deterioration that will lead to release property of glass in this forming surface, the physical deterioration of forming surface.That is, if producing
Glass in raw forming surface it is hot sticky, then the formed body after compression molding can not be separated from molding die sometimes or even if
It is able to carry out the demoulding of formed body, remains the original of the glass of the hot sticky forming surface after demoulding and the bumps as forming surface
Cause.In this case, identical molding die can not be continued to use, it is therefore desirable to interrupt continuous mold pressing procedure, continually into
The maintenance of row forming surface or the exchange of molding die.
It shortens in this way, reheating the service life that the problems in compression molding is molding die (especially forming surface).But companion
With the raising of the needs of optical element in recent years, it is expected that the raising of the productivity of optical element and/or cost effective, is reaching
The aspect of above-mentioned target, the long lifetime of molding die are necessary projects.Especially it is expected the raising of the durability of forming surface.
For example, the method as the durability for improving forming surface, can enumerate through the gold such as known cast iron all the time
The technology of forming surface is protected in the guard method (such as Cr plating or the formation of metal epithelium etc.) in category face.But this molding
The guard method in face is suitable for the molding die that room temperature uses, but the reheating for using under the air atmosphere of high temperature is molded
The overlay film of molding die, Cr plating etc. is easy deterioration, and protection molding is unable to fully in continuous multiple compression molding
Face.
In addition, having used following technologies all the time as the method for preventing glass heat from sticking at forming surface, that is, be molded
When molding, the release agents such as boron nitride are coated on at least either of molding die and glass raw material.But in this method
In, although release property is improved, with mobility (unlockedization is in forming surface), therefore the release agents such as boron nitride compare
A part of forming surface is exposed sometimes, is unable to fully prevent the hot sticky of the glass in forming surface.
Existing technical literature
Patent document
Patent document 1: special open 2001-19446 bulletin
Summary of the invention
Problems to be solved by the invention
The present invention is completed in view of this actual conditions, and its purpose is to provide a kind of long-lives of excellent in te pins of durability
Molding die, the molding die is for being pressed and molded the glass raw material softened in air atmosphere and manufacture and grind
Mill glass optical component blank.
The means used to solve the problem
In order to solve the above problems, deep experimental study has been repeated in the present inventor, as a result, it has been found that, using having
The membrane of oxide ceramics of defined thickness protects substrate surface corresponding with the forming surface of molding die, thus even for
Reheating compression molding under air atmosphere also can be improved the durability of molding die (especially forming surface), so as to complete
The present invention.
Main points of the invention are as follows.
[1] a kind of molding die, at least has upper die and lower die, which is used in air atmosphere to
The glass raw material of softening is pressed and molded and manufactures grinding glass optical component blank, wherein
It is 5 μm or more of membrane of oxide ceramics that the forming surface of at least one of above-mentioned upper die and lower die, which has film thickness,.
[2] molding die as described in above-mentioned [1], wherein above-mentioned membrane of oxide ceramics includes selected from by silica, oxygen
Change at least one of aluminium, zirconium oxide, titanium oxide, magnesia and group of calcium oxide composition.
[3] molding die as described in above-mentioned [1] or [2], wherein above-mentioned membrane of oxide ceramics includes colloidal silica
Silicon.
[4] such as the described in any item molding dies in above-mentioned [1]~[3], wherein above-mentioned membrane of oxide ceramics be 50 μm with
Under.
[5] a kind of grinding manufacturing method of glass optical component blank comprising following processes:
Prepare the process of the described in any item molding dies in above-mentioned [1]~[4]；With
Mold pressing procedure, wherein after being reheated under air atmosphere to the glass raw material being made of optical glass, benefit
The glass raw material softened is pressed and molded with the molding die.
[6] a kind of manufacturing method of optical element comprising following processes:
The mill that the grinding that the manufacturing method as described in above-mentioned [5] manufactures is ground with glass optical component blank
Cut process；With
The grinding process that grinding through above-mentioned grinding process is ground with glass optical component blank.
Invention effect
Molding die according to the present invention, even if to be molded under air atmosphere to the glass raw material softened
In the case that type, manufacture grinding are with glass optical component blank, the deterioration of molding die (especially forming surface) can be also prevented,
It can be continuously pressed and molded, the productivity of molding procedure can be improved.
Detailed description of the invention
Fig. 1 is the schematic diagram for showing an example of molding die of an embodiment of the invention.
Fig. 2 is the sectional view for amplifying the lower die as a part of molding die shown in FIG. 1.
Fig. 3 is the schematic diagram for showing an example of mold pressing procedure of the molding die using an embodiment of the invention.
Fig. 4 is the flow chart for showing the process for manufacturing optical lens with glass lens blank by grinding.
Specific embodiment
Molding die of the invention at least has upper die and lower die, which is used in air atmosphere to having softened
Glass raw material be pressed and molded and manufacture grinding glass optical component blank, wherein in above-mentioned upper die and lower die
It is 5 μm or more of membrane of oxide ceramics that the forming surface of at least one, which has film thickness,.
According to this molding die of the invention, even if to carry out mould to the glass raw material softened under air atmosphere
It is molded, manufacture grinding with glass optical component blank in the case where, can also prevent molding die (especially upper mold and/or
The forming surface of lower die) deterioration, can be continuously pressed and molded, the productivity of molding procedure can be improved.
Hereinafter, to molding die and its manufacturing method of the invention and having used the stamper of molding die of the invention
Sequence (the grinding manufacturing method of glass optical component blank) is described in detail, but the present invention is not by the following embodiments and the accompanying drawings
Any restriction can apply suitable change in the range of the purpose of the present invention to implement.It should be noted that about repeating
The place of explanation, suitably omits the description sometimes, but is not used to limit the purport of invention.
< molding die >
Hereinafter, being illustrated by taking molding die shown in FIG. 1 as an example to one embodiment of the present invention.It should be noted that
Identical label and no longer its explanation repeatedly are marked to identical in figure or corresponding portion.
Fig. 1 is the schematic diagram for showing an example of molding die of an embodiment of the invention.Molding cited by Fig. 1
Mold by with forming surface upper mold 21 and lower die 11, be the cricoid of substantially coaxial shape by the upper mold 21 and 11 regulation of lower die
Cylinder mould 30 is constituted, and it is 5 μm or more of membrane of oxide ceramics that the respective forming surface 27,17 of upper mold 21 and lower die 11, which has film thickness,
25、15。
It should be noted that cylinder mould 30 is arbitrary component parts in the molding die of present embodiment.That is, about cylinder
Mould 30 is also not necessary in the case where being substantially coaxial shape for upper mold 21 and 11 regulation of lower die using other methods.
In addition, in the molding die of present embodiment, as long as membrane of oxide ceramics is formed in lower die 11 and upper mold 21 extremely
Lack any one, it is preferred that expectation is formed in the two.
Then, by taking lower die shown in Fig. 2 as an example, the molding die of present embodiment is described in detail.Fig. 2 is will to make
The sectional view amplified for the lower die 11 of a part of molding die shown in FIG. 1.It should be noted that being omitted about upper mold 21
Illustrate, but can be with lower die 11 the case where it is identical.
As shown in Fig. 2, the lower die 11 of a part of the molding die as present embodiment is by substrate 13 and is formed in base
The membrane of oxide ceramics 15 of material surface 13A is constituted, and makes the surface forming surface 17 of membrane of oxide ceramics 15.That is, present embodiment
Forming surface 17 to have film thickness t be 5 μm or more of membrane of oxide ceramics 15.
Using this lower die 11, even if reheating compression molding is repeated under air atmosphere, it is also possible to prevent substrate
Surface 13A directly with the oxygen in atmosphere or the glass contact softened.In addition, in the forming surface 17 of this present embodiment,
Glass is hot sticky and it is few the case where remaining on forming surface, the physical deterioration of forming surface can be prevented.With this forming surface 17
The lower die 11 of present embodiment is for being continuously pressed and molded with high-durability.
The film thickness t of the membrane of oxide ceramics 15 of present embodiment is 5 μm or more, preferably 10 μm or more, more preferably 20 μ
M or more.In addition, the preferred upper limit of the film thickness t of membrane of oxide ceramics 15 is 80 μm or less, more preferably 50 μm or less.If oxygen
The film thickness t of compound ceramic membrane 15 becomes too thin, then forming surface 17 tends to decrease the durability being continuously pressed and molded.Separately
Outside, the thickness that the film thickness t of membrane of oxide ceramics 15 becomes more than than necessity is thicker, then is more easily peeled off.
It should be noted that the film thickness t of membrane of oxide ceramics of the invention is the oxide pottery for indicating to be formed in forming surface
In porcelain film 9 at (for example, on 2 lines directly handed over by the central point of forming surface any 9 at (central point of forming surface and
Each 4 points of r/3 and 2r/3 when the radius of forming surface to be set as to r)) more than average film thickness.The film thickness of membrane of oxide ceramics
Such as well known ultrasonic type determining film thickness device, induction film thickness are measured or used based on the SEM of the plane of disruption of film
Meter, β Radiolucent formula film thickness gauge etc. measure.
It is further preferred, that the membrane of oxide ceramics 15 of present embodiment it is expected the shape in the way of thoroughly being covered
At in the entire surface of substrate surface 13A.
In the present embodiment, oxide ceramics constitutes membrane of oxide ceramics 15 as principal component.Therefore, oxide
Ceramic membrane 15 preferably comprise 60 mass % or more oxide ceramics, more preferably comprising 80 mass % or more, further preferably include
It 90 mass % or more, particularly preferably include 95% or more.In membrane of oxide ceramics 15, by making oxide ceramics principal component, from
And even if being also possible to prevent the deterioration of overlay film, and then can prevent into for used in the oxidizing atmosphere of high temperature
Chemically/physical deterioration occurs for type face.
In addition, as this oxide ceramics, it can be cited for example that selected from by silica, aluminium oxide, zirconium oxide, oxidation
At least one of titanium, magnesia and group of calcium oxide composition.Especially from the viewpoint of the durability of overlay film, preferably aoxidize
Silicon.It should be noted that membrane of oxide ceramics 15 can be made of any one of the simple substance of above-mentioned oxide ceramics or mixture,
, but it is preferred that expectation is made of the simple substance of silica.
In addition, membrane of oxide ceramics 15 for example may include boron nitride as the ingredient other than above-mentioned oxide ceramics
(BN), silicon carbide (SiC), aluminium nitride (AlN), iron oxide (Fe2O3), chromium oxide (Cr2O3), aluminum phosphate (AlPO4) etc. ingredients.This
A little ingredients can intentionally contain, and can also inevitably (impurity levels) contain.It should be noted that membrane of oxide ceramics
15 comprising in the case where these ingredients, the total of content is preferably 40 mass % or less.If these ingredients are excessive, oxide
Ceramic membrane 15 tends to become fragile, and forming surface is tended to deteriorate because being continuously pressed and molded.
In addition, in addition to the above ingredients, membrane of oxide ceramics 15 may be embodied in the various oxidations that cannot exclude in manufacture
Object ingredient or metal component etc. are used as inevitable ingredient.
In the present embodiment, substrate 13 has the surface 13A corresponding to forming surface 17.The shape of this surface 13A is pressed
It is formed according to the shape for following the molding glass forming body of progress (grinding glass optical component blank).It can be cited for example that convex
Curved, concave curved planar, planar etc..
In addition, the material of substrate 13 can be suitable for according to the hardness or glass transition temperature Tg etc. for carrying out molding glass
Selection, it can be cited for example that stainless steel, cast iron etc..Compared with cast iron, the price of stainless steel is higher, but heat resistance is high, Neng Goucheng
By long-standing use, therefore it is suitable for the higher glass material of glass transition temperature.In addition, cast iron is cheap, and add
Work is good.Therefore, the material of substrate 13 can be suitable for selection according to the characteristic for carrying out molding glass.It should be noted that from
From the perspective of the adaptation for improving substrate 13 and membrane of oxide ceramics 15, preferably make the thermal expansion coefficient of the two close.
The manufacturing method > of < molding die
Then, the manufacturing method about molding die shown in FIG. 1 is enumerated an example and is illustrated.
The manufacturing method of the molding die of present embodiment have prepare correspond to upper die and lower die substrate process and
Membrane of oxide ceramics is formed in the process of the substrate surface of at least one of described upper die and lower die.
Hereinafter, being illustrated to the method for the substrate surface 13A for the lower die 11 that membrane of oxide ceramics 15 is formed in Fig. 2.
It should be noted that omitted the description about upper mold 21, but can be with lower die 11 the case where it is identical.
In present embodiment, prepare coating solution first.In present embodiment, membrane of oxide ceramics is formed by coating solution
15.Coating solution includes at least oxide ceramics and solvent and constitutes.
As oxide ceramics, it can be cited for example that selected from by silica, aluminium oxide, zirconium oxide, titanium oxide, magnesia and
At least one of the group of calcium oxide composition.Especially from the viewpoint of durability, preferably silica.It needs to illustrate
It is that oxide ceramics can be used only a kind, two or more can also be applied in combination.
In addition, it is preferable to use average grain diameter being 5 μm of powder below as oxide ceramics, more preferably using 1 μm
Powder below.
In addition, water or organic solvent can be used as solvent.
The coating solution of present embodiment at least mixed oxide ceramics and solvent form.For mixed method, without spy
It does not limit, well known method can be used.In addition, the blending ratio of oxide ceramics and solvent is also not particularly limited,
With general coating it is also possible to be suitable for adjusting in the way of becoming the desired viscosity corresponding to coating method.
In addition, can be containing ceramics other than the above or oxide etc. as other than above-mentioned oxide ceramics in coating solution
Solid component.Wherein, the total content of these ingredients be preferably 40 mass % of solid component whole (including oxide ceramics) with
Under.
Further, being coated in solution can according to need containing additives such as various dispersing agents, bonding material, plasticizer.This
The total content of a little additives is desired for the 10 mass % or less of coating solution entirety.
In addition, the coating solution of present embodiment preferably comprises colloidal silicon dioxide as binder.Colloidal silicon dioxide
Membrane of oxide ceramics is constituted in the form of silica after firing, therefore firm film can be formed.
Then, prepare the substrate 13 for corresponding to lower die.As long as the material of substrate 13 is according to the glass being pressed and molded
The suitable selection such as material (characteristic) or molding temperature.In addition, the shape of substrate 13 can be according to molding device or as mesh
The shape of target glass forming body (grinding glass optical component blank) is suitable for selection.
Especially, the shape of substrate surface 13A corresponds to the shape of forming surface 17.That is, the shape of surface 13A is according to following
The mode of the shape of molding glass forming body is carried out to be formed, glass forming body is suitable for setting according to the shape as target.
It such as can be convex surface shape, concave curved planar, planar etc..
It should be noted that the pre-treatments such as injection (blast) processing can be implemented as needed about substrate surface 13A.
Additionally it may be desirable to which substrate surface 13A removes the wastes such as the bits such as degreasing or grindstone dust in advance.It, can be with by implementing these processing
Improve the adaptation of substrate surface 13A and membrane of oxide ceramics 15.
Then, by coating solution coating in substrate surface 13A [painting process].For coating method, it is not particularly limited,
Well known method can be used to carry out.It can be cited for example that spraying (spray coat) method, hairbrush are coated with (brush
Coating) the methods of method, infusion process.
, can be according to suitable adjustment such as the film thickness t of membrane of oxide ceramics 15 to be formed about coating weight, but make film thickness t
In the case where thickeing, it is preferably divided into 2 times or more and is coated again.If once just coating is a large amount of is coated with solution, after drying
Membrane of oxide ceramics crack sometimes.In addition, the film thickness of the membrane of oxide ceramics after drying is sometimes because of the shape of substrate
Deviation can be generated.
For example, as shown in Fig. 2, the expectation of forming surface 17 is chased after from the shape of substrate surface 13A.But as substrate 13,
In the case that surface 13A is concave surface, if will largely be coated with solution coating in surface 13A, the oxidation being scattered in coating solution
Object ceramics are aggregated the recess portion on the 13A of surface and become easy precipitating.As a result, for the membrane of oxide ceramics after drying
For film thickness, compared with periphery, central part is thicker, the difference in terms of forming surface 17 and surface 13A generate curvature sometimes.If sharp
It is pressed and molded with this forming surface 17, then generates shape defect sometimes in formed body.
It should be noted that carrying out in the case where coating again, it is expected that carrying out the drying of appropriateness to coated face, such as preferably
After the drying for having carried out appropriateness with finger contact coated face confirmation, coated again.
Then, [drying process] is dried to the molding die for being coated with coating solution.Drying temperature can be room temperature
~200 DEG C.In addition, drying time can be suitable for adjusting according to the type or coating weight of solvent, it can be 1 hour~6 hours left sides
It is right.
Later, the sufficiently dry molding die of coated face is fired, so that coating material solidification (is fired work
Sequence).Firing condition can according to the suitable adjusting such as the type of oxide ceramics or film thickness, such as firing temperature can for 90~
150 DEG C, the firing time can be 10 minutes~1 hour or so.
It should be noted that above-mentioned ablating work procedure is arbitrary process.That is, it needs to will molding in aftermentioned mold pressing procedure
Mold control is defined temperature, therefore the burning of the molding die in above-mentioned ablating work procedure can also be had both by heating at this time
It makes (solidification of coating material).
With this method, the lower die 11 about a part of the molding die as present embodiment, can form tool
Having film thickness t is the forming surface 17 of 5 μm or more of membrane of oxide ceramics 15.Herein, membrane of oxide ceramics 15 is sealed at substrate surface
On 13A, it will not be removed from substrate 13 being heated, pressurizeing in an atmosphere.
In addition, the forming surface 17 of this present embodiment preferably has the bumps of appropriateness.That is, coating material is in substrate surface
Solidify on 13A, to form membrane of oxide ceramics 15, but at this point, the surface roughness Rz of forming surface 17 is preferably greater than 10 μm.It is right
Glass former material in this forming surface 17, after the effect and pressings that kept the temperature to the glass raw material softened before pressing
The quenching effect of material is by expectation.
The < grinding manufacturing method > of glass optical component blank
The manufacturing method of the grinding glass optical component blank of present embodiment includes following processes:
Prepare the process of the molding die of present embodiment；With
Mold pressing procedure, wherein after being reheated under air atmosphere to the glass raw material being made of optical glass, benefit
The glass raw material softened is pressed and molded with the molding die.
Hereinafter, by taking grinding glass lens blank as an example, to the one of the manufacturing method of grinding glass optical component blank
A embodiment is illustrated.Specifically, being directed at the molding for having used present embodiment shown in FIG. 1 while referring to Fig. 3
An example of the mold pressing procedure of mold is illustrated.It should be noted that the present invention is by any restriction of following implementation,
Can apply in the range of the purpose of the present invention is suitable for change to implement.
Firstly, preparing molding die shown in FIG. 1 as molding die.That is, preparing that there are 5 μm of film thickness in forming surface 17
The lower die 11 of above membrane of oxide ceramics 15, forming surface 27 have 5 μm of film thickness with membrane of oxide ceramics 25 upper mold 21
With cylinder mould 30.Further, molding die is heated in advance.The heating temperature of molding die is preferably according to the molding glass of progress
Raw material being suitable for adjustment, but it is desirable that, the temperature of molding die according to the slackened temperature for glass raw material for molding
(Ts) mode for paying close temperature is heated in advance.
On the other hand, prepare necessary amount is processed into regulation shape (such as polyhedron-shaped, disc-shape, rotation
Elliptical shape etc.), the glass raw material 40a of predetermined weight (as the weight more than optical element of target).As glass original
The material of material 40, is not particularly limited, and can enumerate the fluorophosphate system glass that (1) at least contains P, O and F as glass ingredient
B is more contained in glass, (2) in glass ingredient2O3、La2O3Boric acid lanthanide glass, (3) more contain in glass ingredient
SiO2、TiO2SiO2-TiO2It is glass, (4) with P2O5As principal component and contain the easy reduction being made of Nb, Ti, Bi and W
The niobium phosphate system optical glass of ingredient.
The forming method of glass raw material 40a is not particularly limited.It can be cited for example that: the glass plate of plate will be shaped to
Obtained from cutting about the sheet glass of hexahedral shape, at equal intervals by columned glass raw material cutting obtained from disk
The sheet glass of shape accepts the melten glass flowed down by nozzle using mold is accepted and then is shaped to ellipse of revolution shape and carries out
Sheet glass obtained from cooling etc..
Then, the glass raw material 40a preparatory heat softened is supplied to lower die 11.Later, upper mold 21 is inserted into cylinder
Mould 30.In Fig. 3 (A), the load that is generated by upper mold 21 is simultaneously not applied to glass raw material 40a, therefore maintains the glass softened
The shape of glass raw material 40a.
In addition, glass in order to prevent is hot sticky, preferably at least one of glass raw material 40a and forming surface 17,27
Coated release agent.As release agent, such as use the powdered release agent of boron nitride, aluminium oxide, silica, magnesia etc..It needs
It is noted that the molding die of present embodiment has membrane of oxide ceramics 15,25 in forming surface 17,27, therefore carrying out
After the demoulding of formed body, release agent is easy to remain on forming surface 17,27.
Then, as shown in Fig. 3 (B), make the decline of upper mold 21 to press glass raw material 40a, by glass raw material 40a mould
Molded is the shape for imitating the forming surface shape of upper and lower mould, to obtain grinding glass optical component blank 40b.
Glass raw material 40a when compression molding preferably remains 104~106The viscosity of dPa s.In addition, compression molding is big
It is carried out in gas.
In addition, other than the shape with convex surface and concave surface as shown in Fig. 3 (B), grinding glass optical component base
As long as expecting that the shape of 40b is biconvex shape, the shape with convex surface and plane, the shape with concave surface and plane, bi-concave shape
It is just not particularly limited Deng with the approximate shape of the shape of the glass optical component as target.
It forms obtained grinding to be taken out with glass optical component blank 40b from molding die, implement as needed for disappearing
Except the heat treatment (annealing) of strain (deformation).
The forming surface 17,27 of molding die according to the present embodiment, upper mold 21 and lower die 11 has membrane of oxide ceramics
15,25, therefore the grinding for obtaining molding can be easy and taken out with glass optical component blank 40b, taking out grinding glass
Forming surface 17,27 after optical element blank 40b is also difficult to generate by the residual of hot sticky caused glass, forming surface it is physical
Deterioration is few.
Therefore, molding die (especially lower die 11 and upper mold 21) continuous use (such as punching press number 500 times can be made
Above, it is more preferably 700 times or more), it can be with continuous several times above-mentioned mold pressing procedure repeatedly.
It is the glass in forming surface generally, as the one of the major reasons for the continuous use for interfering molding die
It is hot sticky.The glass in this forming surface is hot sticky in order to prevent, in general, applying in at least either of forming surface and glass raw material
Cloth release agent is general.But it even if also has release agent for using in the case where this release agent and is unable to fully cover
Pressing when compression molding of the case where forming surface and glass raw material or the glass softened due to, oozes out from the gap of release agent
The case where etc., the position that forming surface is directly contacted with glass is generated, therefore the hot sticky of glass can be generated.
In existing molding die, forming surface is that the substrate surface of molding die (is equivalent to part, Fig. 1 of 13A in Fig. 2
With the part for being equivalent to 23A in Fig. 3).Therefore, generate forming surface on glass it is hot sticky in the case where, hot sticky glass is direct
It is contacted with substrate surface.Glass is directly hot sticky in the case where substrate surface, even if removing formed body (grinding Glass optical member
Part blank 40b), the hot sticky glass in forming surface (substrate surface) is also easy residual.For remaining the hot sticky glass in forming surface
For the molding die of glass, it is difficult to continue to use, it is therefore desirable to the exchange of the maintenance of forming surface and molding die itself.
In contrast, in the molding die of present embodiment, the forming surface 17,27 of lower die 11 and upper mold 21 has oxide
Ceramic membrane 15,25, therefore even if the pressing etc. when by compression molding makes glass be crimped on membrane of oxide ceramics 15,25, glass
Glass is also easy to demould from forming surface 17,27.This is because membrane of oxide ceramics 15,25 have appropriateness brittleness, therefore take out at
When type body (grinding glass optical component blank 40b), membrane of oxide ceramics 15,25 wears and demoulding is brought to act on.Therefore, into
The forming surface 17,27 after the demoulding of formed body 40b of having gone is difficult to happen hot sticky, and molding die can be used continuously.
It should be noted that in the case that membrane of oxide ceramics is stripped together with hot sticky glass, after demoulding at
The surface of type body 40b is attached with a part of membrane of oxide ceramics 15,25, but for formed body 40b, subsequent handling can be into
Row grinding/grinding is what there is no problem as premise.
In addition, being formed in the oxygen of forming surface if the removing of the hot sticky and membrane of oxide ceramics of this glass is repeated
The thickness of compound ceramic membrane tends to slowly thinning.Therefore, in the case that the film thickness of membrane of oxide ceramics is excessively thin, oxide ceramics
Film is possible to be removed from forming surface, to expose substrate surface.At the position that this substrate surface exposes, it some times happens that glass
Glass it is hot sticky, therefore also bring along following problems: after removing formed body, remaining the hot sticky glass in forming surface.That is, from can
It is continuously pressed and molded and from the perspective of the substrate surface that adequately protects, the thickness of the appropriateness of membrane of oxide ceramics is must
It wants.
In the molding die of present embodiment, it is 5 μm that the forming surface of at least one of upper die and lower die, which has film thickness,
Above membrane of oxide ceramics.It, can also be to prevent even if reheating compression molding is continuously repeated according to this molding die
Only the exposing of substrate surface, can adequately protect substrate surface.Further, from the substrate surface that adequately protects, raising molding die
Continuous use number from the perspective of, the film thickness of membrane of oxide ceramics the big more preferably, preferably 10 μm or more, more preferable
It is 20 μm.
In addition, as film thickness thickens, formed body can be more attached in the form of block for membrane of oxide ceramics,
Tend to be easy to be stripped.Therefore, as the film thickness of membrane of oxide ceramics, the preferred upper limit is 80 μm or less, more preferably 50 μ
M or less.
In addition, as described above, in the molding die of present embodiment, the forming surface of at least one of upper die and lower die
With 5 μm of film thickness or more of membrane of oxide ceramics, thus can prevent corresponding to upper die and lower die substrate surface directly and greatly
The glass contact after oxygen or softening in gas can prevent the deterioration of the substrate surface corresponding to forming surface.As a result, can be with
Improve the service life of substrate (substrate surface for especially corresponding to forming surface).
Further, molding die according to the present embodiment can easily be done substrate corresponding to upper die and lower die
Recycling.Even if that is, in the molding die of present embodiment for remain it is hot sticky in the case where the glass of forming surface,
Substrate surface corresponding to forming surface is oxidized the protection of object ceramic membrane, therefore is unaffected.Therefore, even if needing forming surface
Maintenance can easily revert to the substrate of script as long as hot sticky glass is removed together with membrane of oxide ceramics
Surface.Further, for this substrate, membrane of oxide ceramics is formed again, then can be used as the molding die of present embodiment
It is recycled.
Further, molding die according to the present embodiment, even if imprecisely carrying out the temperature control of molding die,
It can expect the improvement effect of the yields of formed body.
In general, being heated to glass raw material in reheating compression molding and making its softening, to the glass softened
It is pressed and molded, molding obtains being similar to the grinding glass optical component blank of the shape of the optical element as target.
In order to carry out good compression molding, carries out molding glass expectation and remain suitable viscosity (preferably 10 in pressing4~
106dPa・s)。
But the glass softened is when being put into molding die, and if the temperature of molding die is low, the temperature of glass raw material
Dramatic decrease is spent, viscosity gets higher (i.e. glass is hardened) in compression molding.If pressing this glass raw material, forming
It is bad (cracking rupture or extending bad) that body (grinding glass optical component blank) generates molding sometimes.Therefore, it is desirable to
It is that molding die is sufficiently heated.
On the other hand, if the temperature of molding die is excessively high, glass becomes easy hot sticky in forming surface.If in hot sticky glass
Glass remains on the compression molding after carrying out in the state of forming surface, then the shape of remaining glass is transferred to the table of formed body
Face, become formed body it is bad the main reason for.In addition, this molding die is difficult to continue to use, it is therefore desirable to forming surface
Maintenance or the exchange of molding die itself.Therefore, it is not intended that exceedingly being heated to molding die.
In this way, the temperature control of molding die is important for improving the yields of formed body.Therefore, it is existing at
In pattern tool, yields is improved or when production efficiency, needing closely (can be with for suitable temperature range by molding die control
It prevents from forming hot sticky temperature bad and that glass can be inhibited).
It, can also even if imprecisely carrying out the temperature control of molding die but in the molding die of present embodiment
To improve the yields of formed body.The reasons why as the yields that can be improved formed body, speculates present inventor has performed following
It investigates.
In the molding die of present embodiment, forming surface 17,27 has membrane of oxide ceramics 15,25.Therefore, it puts into down
The glass raw material 40a of mould 11 will not directly be contacted directly with the substrate surface 13A of lower die 11, but with membrane of oxide ceramics 15
Surface 17 contact.At this point, with glass raw material 40a directly compared with the case where 11 substrate surface 13A of lower die is contacted, it is believed that
The temperature of glass raw material 40a will not dramatic decrease, hot mobile mitigation.Its result thinks, even if the ratio for lower die 11 is suitble to
Temperature range it is low in the case where, glass raw material 40a insulation can keep suitable viscosity until when pressing.In addition,
Think that the thermal shock caused by glass raw material and the temperature difference of molding die sharply is also inhibited.
Further, even if the case where temperature for molding die is higher than suitable temperature range, as described above, according to this reality
The molding die of mode is applied, hot sticky glass is also difficult to remain on the forming surface 17,27 after the demoulding for having carried out formed body 40b.
In this way, molding die according to the present embodiment also can even if imprecisely carrying out the temperature control of molding die
It is enough that body is manufactured with excellent yields.
In addition, the grinding glass optical component blank manufactured for the molding die by this present embodiment
Speech, it is difficult to which generation molding is bad, and form accuracy is also excellent.Therefore, in grinding and grinding process later, it is possible to reduce processing
Amount or process time, productivity are excellent.
The manufacturing method > of < optical element
The manufacturing method of the optical element of present embodiment includes following processes:
To the prepared grinding glass of the manufacturing method of glass optical component blank of the grinding by present embodiment
The grinding process that optical element blank is ground；With
To the grinding process ground via the grinding process grinding with optical element blank.
As the optical element obtained by this method, it can be cited for example that spherical lens, non-spherical lens, microspur are saturating
The various lens such as mirror, lens array；Prism, diffraction grating etc..
Hereinafter, being illustrated by taking optical lens as an example to an embodiment of the manufacturing method of optical element.It is specific and
Speech, grinding glass lens blank 40b shown in Fig. 3 is directed at while referring to Fig. 4 and (is only called " lenticular blank " sometimes below.)
Grinding and grinding process be illustrated.It should be noted that the present invention is by any restriction of the following embodiments and the accompanying drawings, at this
In the range of the purpose of invention, change appropriate can be applied to implement.
Grinding process is ground using the grindings such as ciamond grinder grinding stone, by the two sides of glass optical component blank 40b
For the technique of defined radius of curvature.In addition, grinding process is to use abrasive disk, using free abrasive grains such as cerium oxide as grinding agent
And to the technique that the two sides for the optical element blank for carrying out grinding is ground.
In step S10 shown in Fig. 4, (CG adds the spherical grinding process of the main surface of progress lenticular blank 40b first
Work).As the curve generator (curve generator) processed for CG, it is not particularly limited, uses ciamond grinder etc.
Well known curve generator.In CG processing, carried out with surface of tens of μm~hundreds of μm of the processing capacity to lenticular blank thick
Grinding is ground two sides in the way of the curvature close to final lens shape.In addition, CG processing for example using
The partial size for the abrasive grain being made of diamond particles is the grinding stone of 20~60 μm (being expressed as #800~#400 with granularity), is being supplied
It is ground while grinding fluid.It should be noted that the numerical value that the smaller then granularity of the partial size of abrasive grain indicates is bigger.
In following step S11, the smooth processing (SM processing) based on fine grinding is carried out.SM processing can be
The processing in one stage is but it is also possible to be multistage processing.As grinding stone used in SM processing, metal adhesive can be used together
Grinding stone and resinoid bond grinding stone or resinoid bond grinding stone can be used only.It should be noted that in present embodiment
In, in these SM processing, the grinding stone of metal adhesive is not preferably used, and added using only resinoid bond grinding stone
Work.In addition, resinoid bond grinding stone is 8~20 μm (being expressed as #2500~#1200 with granularity) it is preferable to use the partial size of abrasive grain
Grinding stone.
Then, in step s 12, attrition process is carried out.In grinding process, grinding comprising 5 μm of partial sizes below is used
The lapping liquid of mill abrasive grain (such as free abrasive grain of acidification cerium) grinds surface, grinds several μm~ten several μm.It is ground by this
Grinder sequence forms the optical lens face of optical lens main body.
Finally, carrying out centering process using step S13, but it also can be omitted centering process according to different situations.Centering work
In sequence, such as carry out following processing: clamping optical lens main body with a pair of of Lens holder and feel relieved, make lens body around
While its center line rotates, the lateral circle surface of lens body is ground to circular with ciamond grinder etc..
Such available biconvex lens, biconcave lens, plano-convex lens, plano-concave lens, positive meniscus lens, falcate are recessed
The various optical lenses such as lens.
In addition, according to purpose is used antireflection film, total reflection film can be coated in the optical function face of obtained lens
Deng.
In the manufacturing method of the optical lens of this present embodiment, the grinding glass light of present embodiment has been used
Element blank is learned, therefore can substantially reduce the processing capacity in above-mentioned grinding process and grinding process and process time, Ke Yiti
High production rate.
It should be noted that the present invention is not limited by above-mentioned embodiment, can carry out within the scope of the invention each
Kind changes.
For example, showing and only being formed in the forming surface of lower die and upper mold in the molding die of above-mentioned present embodiment
The example of membrane of oxide ceramics, for cylinder mould, can also form oxide ceramics but as long as can be successfully pressed and molded
Film.
In addition, in Fig. 1 of above-mentioned embodiment, to be with the molding die of glass lens blank for making grinding
Example is illustrated, but the present invention is not limited to this molding dies.That is, molding die of the invention is suitable as various
Type the grinding production of glass optical component blank used in molding die.
[embodiment]
1. the preparation of molding die
< molding die I >
Firstly, using silica as principal component, will be added and make in coating material of the colloidal silicon dioxide as binder
It for the water of solvent, is sufficiently stirred, obtains the coating solution of desired viscosity.
Then, as the substrate of molding die, prepare the upper die and lower die and cylinder mould of stainless steel.
The coating solution of viscosity for being pre-adjusted as appropriateness is filled to air-brush (air brush), in upper die and lower die
The entire surface in the face corresponding to forming surface in surface equably sprays coating solution atomization.
After making the face for being coated with coating solution dry at normal temperature, 2 sprayings repeatedly.Later, coating material will be formd
Molding die is put into heating furnace, is fired 1 hour under air atmosphere in 150 DEG C.
The obtained molding die I has about 20 μm of membrane of oxide ceramics in forming surface.It should be noted that oxidation
The measurement of the film thickness of object ceramic membrane is carried out using FISCHER society film thickness gauge DUALSCOPE.It is below and identical.
< molding die II >
For molding die II, make 5 μm of film thickness of membrane of oxide ceramics, in addition to this, using with molding die I
Same method production.
< molding die III >
For molding die III, makes the principal component aluminium oxide of coating material, makes the film thickness of membrane of oxide ceramics
It 30 μm, in addition to this, is made using method same as molding die I.
< molding die IV >
For molding die IV, makes the principal component zirconium oxide of coating material, makes the film thickness of membrane of oxide ceramics
It 50 μm, in addition to this, is made using method same as molding die I.
< molding die V >
For molding die V, make 80 μm of film thickness of membrane of oxide ceramics, in addition to this, using with molding die I
Same method production.
< molding die VI >
For molding die VI, membrane of oxide ceramics is replaced, the film forming of silicon nitride is carried out using sputtering equipment, is made
Film thickness is 30 μm, in addition to this, is made using method same as molding die I.
< molding die VII >
For molding die VII, membrane of oxide ceramics is not formed, making substrate surface is directly forming surface, except this it
Outside, it is made using method same as molding die I.
2. the production of lenticular blank
Then, lenticular blank has been made using above-mentioned molding die I~VII.In the case where using any molding die,
It is carried out according to the production order of following lenticular blank A and B.
< lenticular blank A >
Firstly, preparing fluorophosphate system glass raw material (ellipse of revolution shape, quality 16g, Tg=404 DEG C, Ts=444
℃).Then, in the release agent (boron nitride) of the surface coated powder shape of glass raw material.In addition, in the soft of reheating device
Change pallet also coated release agent.
The glass raw material for being coated with release agent is supplied to pallet, investment is set as in 450~700 DEG C of heating furnace,
It is reheated under air atmosphere.Optical glass for mold press molding raw material softening after reheating is about 105DPa s's is viscous
Degree.
Then, by reheating, the glass raw material softened is molded using molding die under air atmosphere
Molding, has made the lenticular blank A of single side convex, diameter 40mm, height 5mm.It should be noted that in the molding of molding die
Face has been pre-coated with release agent, and molding die is heated in advance in the way of for the neighbouring temperature of slackened point (Ts).
< lenticular blank B >
Firstly, preparing boric acid group of the lanthanides glass raw material (ellipse of revolution shape, quality 21g, Tg=655 DEG C, Ts=690
℃).Then, in the release agent (boron nitride) of the surface coated powder shape of glass raw material.In addition, in the soft of reheating device
Change pallet also coated release agent.
The glass raw material for being coated with release agent is supplied to pallet, investment is set as in 700~900 DEG C of heating furnace,
It is reheated under air atmosphere.Optical glass for mold press molding raw material softening after reheating is about 105DPa s's is viscous
Degree.
Then, by reheating, the glass raw material softened is molded using molding die under air atmosphere
Molding, has made the lenticular blank B of single side convex, diameter 30mm, height 4mm.It should be noted that in the molding of molding die
Face has been pre-coated with release agent, and molding die is heated in advance in the way of for the neighbouring DEG C temperature of slackened point (Ts).
3. evaluating (1)
About molding die I~VII, the durability of molding die is had rated.Specifically, to not exchanging molding die and
The quantity (punching press number) of the lenticular blank persistently made is evaluated.It should be noted that about more than 1000 punching presses and
The molding die that continuous mould pressing obtains stops compression molding after 1000 times uses.In addition, because of deterioration (the hot sticky glass of forming surface
Glass remains on forming surface) and be difficult to carry out to stop compression molding in the case where the continuous use of molding die.As a result shown in table 1.
[table 1]
As shown in table 1, for the substrate surface of molding die is directly as the molding die VII of forming surface, only instead
It carries out ten again to be pressed and molded several times, hot sticky glass remains on forming surface (substrate surface), can not continue to use molding die.
In addition, foring the molding die of ceramic membrane for the silicon nitride used as the material other than oxide ceramics
For VI, compared with molding die VII, the raising of durability is confirmed.But in the present embodiment, it is pressed and molded in high temperature
It is carried out in air atmosphere, therefore in compression molding is repeated, silicon nitride oxidation, (film is bad for the ceramic membrane fragility of forming surface
Change).As a result, forming surface generates film and peels off when punching press number is 200 times less than, the substrate surface of molding die exposes.It
Afterwards, substrate surface that is hot sticky and remaining in exposing occurs for glass, can not continue to use molding die.
In contrast, it confirms in molding die I~V of the invention, forming surface has 5 μm of film thickness or more of oxide
Ceramics, it is possible thereby to which the substrate surface for the molding die that adequately protects, is further also possible to prevent hot sticky glass and remains on molding
Face, no matter carrying out the composition of molding glass raw material or the shape of formed body, be able to carry out 500 times or more it is continuous at
Type.
4. evaluating (2)
About molding die I and VII, the overall merit of molding die has been carried out.Specifically, using similar to the above
Method has made certain amount (be 1500 in the case where molding die I, in the case where molding die VII be 100) respectively
Lenticular blank A, have rated the incidence of the exchange times of molding die and the defective products of obtained lenticular blank.Especially,
About the incidence of defective products, the detailed content of defective products is had rated.It should be noted that being judged as the deterioration because of forming surface
The molds such as the deterioration of molding die other than (hot sticky glass remains on forming surface) or forming surface are difficult to the case where being used continuously
Under, carry out the exchange of molding die.As a result it is shown in table 2.
[table 2]
As shown in table 2, it is equivalent in the molding die VII of comparative example of the invention, only ten is pressed and molded several times repeatedly, heat
Viscous glass remains on forming surface (substrate surface), needs to exchange molding die, needs to exchange until making 100 lenticular blanks
6 molding dies.Further, for the lenticular blank made by molding die VII, bad or cracking rupture of extending is big
Amount occurs, and 22% defective products has occurred.
In contrast, in molding die I of the invention, even if 500 lenticular blanks of production, the exchange time of molding die
Number is 1 time.1 mold exchange is occurred when making 1000 lenticular blanks, is not because hot sticky glass remains
In forming surface, but since other components of molding die deteriorate.In addition, extending caused by bad or cracking rupture not
The generation of non-defective unit is few, bad product rate 0.5%.
5. evaluating (3)
Then, about the lenticular blank for using molding die I, molding die II and molding die VII to obtain, not to molding
The relationship of good and molding die temperature is evaluated.
Specifically, the temperature control when heating of molding die is closely carried out, by the temperature of respective molding die
It is adjusted to defined temperature (blank A is 380~440 DEG C, blank B is 680~740 DEG C) shown in table 3, in addition to this, is utilized
Method same as above-mentioned lenticular blank A and B has made lenticular blank.
Cracking rupture is produced in obtained lenticular blank or is extended in undesirable situation, it is bad to form.Evaluation knot
Fruit is shown in table 3.It should be noted that in table 3 × mean to form it is bad, zero mean that molding is good.
[table 3]
As shown in table 3, for the molding die VII for being equivalent to comparative example of the invention, molding die is confirmed
It is bad that temperature only slightly just produces molding to low temperature side movement.
As molding die VII, inhibit to need to improve molding die in the undesirable situation of the molding in the region of low temperature side
Temperature, if but molding die temperature it is high, be easy to produce the hot sticky of glass and molding die, and shape after molding is inclined
Difference becomes larger.Therefore, it is known that will lead to the decline of productivity and quality using molding die VII production lenticular blank.
In contrast, in molding die I and II of the invention, even if confirming the temperature of molding die slightly to low temperature
Side movement is also able to carry out good molding.
In this way, knowing: the temperature range that can be pressed and molded broadens, without critically carrying out the temperature of molding die
Management, productivity improve, further, will not be generated being pressed and molded in the region compared with low temperature side molding it is bad, at
Form variations after type become smaller, stay in grade.
[symbol description]
11 ... lower dies
21 ... upper molds
13,23 ... substrates
13A, 23A ... substrate surface
15,25 ... membrane of oxide ceramics
17,27 ... forming surfaces (oxide ceramics film surface)
30 ... cylinder moulds
The glass raw material that 40a ... has softened
40b ... grinding glass optical component blank
Claims (7)
1. a kind of molding die, at least has upper die and lower die, the molding die in air atmosphere to having softened
Glass raw material is pressed and molded and manufactures grinding glass optical component blank, wherein
It is 20 μm or more of membrane of oxide ceramics that the forming surface of at least one of the upper die and lower die, which has film thickness,
More than the film thickness expression of the membrane of oxide ceramics is formed at 9 in the membrane of oxide ceramics of the forming surface
Average film thickness,
The membrane of oxide ceramics is that solution made of by being coated at least mixed oxide ceramics and solvent is formed.
2. molding die as described in claim 1, wherein the membrane of oxide ceramics include selected from by silica, aluminium oxide,
At least one of zirconium oxide, titanium oxide, magnesia and group of calcium oxide composition.
3. molding die as claimed in claim 1 or 2, wherein the membrane of oxide ceramics includes colloidal silicon dioxide.
4. molding die as claimed in claim 1 or 2, wherein the membrane of oxide ceramics is 50 μm or less.
5. molding die as claimed in claim 3, wherein the membrane of oxide ceramics is 50 μm or less.
6. the manufacturing method that glass optical component blank is used in a kind of grinding comprising following processes:
Prepare the process of molding die according to any one of claims 1 to 5；With
Mold pressing procedure, wherein after reheating under air atmosphere to the glass raw material being made of optical glass, utilize institute
Molding die is stated to be pressed and molded the glass raw material softened.
7. a kind of manufacturing method of optical element comprising following processes:
The grinding that the grinding manufactured by manufacturing method as claimed in claim 6 is ground with glass optical component blank
Process；With
The grinding process that grinding through the grinding process is ground with glass optical component blank.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013257135A JP6411734B2 (en) | 2013-12-12 | 2013-12-12 | Mold for glass optical element blank for polishing, glass optical element blank for polishing, and method for producing optical element |
| JP2013-257135 | 2013-12-12 | ||
| PCT/JP2014/081846 WO2015087742A1 (en) | 2013-12-12 | 2014-12-02 | Mold for glass optical element blank for polishing, and methods for producing glass optical element blank for polishing and optical element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105813991A CN105813991A (en) | 2016-07-27 |
| CN105813991B true CN105813991B (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201480066195.8A Active CN105813991B (en) | 2013-12-12 | 2014-12-02 | The manufacturing method of grinding glass optical component blank molding die and grinding glass optical component blank and optical element |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6411734B2 (en) |
| CN (1) | CN105813991B (en) |
| WO (1) | WO2015087742A1 (en) |
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| CN110655322A (en) * | 2018-06-29 | 2020-01-07 | Hoya株式会社 | Reheating pressing glass material, polishing glass, and method for producing same |
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| JPS63297223A (en) * | 1987-05-29 | 1988-12-05 | Fuji Dies Kk | Molten glass molding tool |
| JPS6433022A (en) * | 1987-07-27 | 1989-02-02 | Olympus Optical Co | Production of optical element forming die |
| JPH02129035A (en) * | 1988-11-04 | 1990-05-17 | Olympus Optical Co Ltd | Mold for molding optical element |
| JPH1143334A (en) * | 1997-07-22 | 1999-02-16 | Minolta Co Ltd | Production of mold protecting film |
| JPH11180721A (en) * | 1997-12-19 | 1999-07-06 | Asahi Optical Co Ltd | Metal mold for forming mold |
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| US8857217B2 (en) * | 2008-12-18 | 2014-10-14 | Konica Minolta, Inc. | Mold and glass molded body manufacturing method |
| JP5099053B2 (en) * | 2009-03-13 | 2012-12-12 | コニカミノルタアドバンストレイヤー株式会社 | Method for producing glass mold and method for producing glass molded body |
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| JPS63297232A (en) * | 1987-05-29 | 1988-12-05 | Olympus Optical Co Ltd | Molding mold for glass product |
| JPH04243923A (en) * | 1990-12-27 | 1992-09-01 | Olympus Optical Co Ltd | Mold for optics |
| JPH05116963A (en) * | 1991-10-24 | 1993-05-14 | Olympus Optical Co Ltd | Mold for molding optical element |
| JPH10251032A (en) * | 1997-03-11 | 1998-09-22 | Nippon Steel Corp | Alloy for glass molding die, and glass molding die manufactured from the same |
| JP2001089164A (en) * | 1999-09-22 | 2001-04-03 | Olympus Optical Co Ltd | Form block for optical element |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015087742A1 (en) | 2015-06-18 |
| CN105813991A (en) | 2016-07-27 |
| JP6411734B2 (en) | 2018-10-24 |
| JP2015113262A (en) | 2015-06-22 |
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