CN101568496A - Optical glass - Google Patents
Optical glass Download PDFInfo
- Publication number
- CN101568496A CN101568496A CNA2007800478350A CN200780047835A CN101568496A CN 101568496 A CN101568496 A CN 101568496A CN A2007800478350 A CNA2007800478350 A CN A2007800478350A CN 200780047835 A CN200780047835 A CN 200780047835A CN 101568496 A CN101568496 A CN 101568496A
- Authority
- CN
- China
- Prior art keywords
- composition
- opticglass
- present
- glass
- transition temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/122—Silica-free oxide glass compositions containing oxides of As, Sb, Bi, Mo, W, V, Te as glass formers
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Provided is an optical glass, which has a refractive index (nd) of 1.9 or more, an Abbe's number (vd) of 15 or more, a glass transition point (Tg) of 300 DEG C or below, does not contain Pb and/or As compound and contains a TeO2 component of 50 mol% or more. The optical glass contains an R2O compound (R is one or more kinds of elements selected from among a group composed of Li, Na, K and Cs), ZnO component and Bi2O3 component, and furthermore, contains Al2O3 and/or Ga2O3 component.
Description
Technical field
The present invention relates to a kind of optical glass having high refractive index, and this opticglass has low-down second-order transition temperature (Tg), and the chemical durability excellence, is suitable for precision press molding.
Background technology
The lens that constitute the optics system have spherical lens and non-spherical lens usually.Most spherical lenses are made by the glass molded article that the compression moulding of glass material reheat is obtained being ground cut to grind.On the other hand, what obtain main flow in the method for non-spherical lens is following method: the mould by having high-precision forming face is with the compression moulding of thermoplastic lens preforming material, the shape transferred thereon of the high-precision forming face of mould is obtained aspheric lens to the lens preforming material, promptly make the method for non-spherical lens by precision press molding.
When obtaining the such glass molded article of non-spherical lens by precision press molding, need be pressed under hot environment, therefore, the mould that use this moment is also exposed to the open air at high temperature, in addition, again mould is applied high pressing pressure.Therefore, when with the thermoplastic of lens preforming material the time and to the lens preforming material, being pressed, oxidized, the corrosion of the forming face of mould, the mold release film that perhaps is arranged at the surface of section of mould molding surface sustains damage, the situation that perhaps can not keep the high-precision forming face of mould becomes many, in addition, also subject to damage of mould self.Like this, the more mold exchange of having to, the replacing number of times of mould increases, and can not realize low cost, mass production.Therefore, from suppressing above-mentioned damage, keeping the high-precision forming face of mould for a long time, and the precision press molding under low pressing pressure becomes possible viewpoint and sets out, and expects to have alap second-order transition temperature (Tg) as the glass of the lens preforming material that is used for precision press molding.
Yet, when carrying out precision press molding, be minute surface or the state that need approach minute surface as the surface of the glass of this lens preforming material.The method of normally directly making by melten glass by dripping method of the manufacture method of lens preforming material and cut the method for making of grinding by grinding, the former method more usually when considering cost or process number.The lens preforming material that obtains by dripping method is called as gob (gob) or glass gob.These lens preforming materials need wash rubbish and the dirt of removing the surface before precision press molding.In addition, be configured as the situation that also will be exposed to again behind the lens high humidity under, so require the chemical durability stipulated owing to exist.
As one of glass with high refractive index and lower glass transition temperatures (Tg), well-known is with TeO
2For the telluride of main component is a glass.
For example, in Japanese kokai publication sho 62-108741, put down in writing TeO
2-PbO-B
2O
3Be glass, in TOHKEMY 2006-182577, put down in writing B
2O
3-TeO
2-ZnO-La
2O
3-Nb
2O
5Be glass.
Summary of the invention
The opticglass of putting down in writing among the Japanese kokai publication sho 62-108741 has been realized desired high refractive index high dispersive, contains the PbO composition, and is from the viewpoint of environmental influence, not preferred.In addition, the opticglass of putting down in writing among the TOHKEMY 2006-182577 contains La in a large number
2O
3Or Nb
2O
5Therefore composition exists the defective that can not obtain enough low second-order transition temperature (Tg).
In addition, the opticglass that common precision press molding is used, when generally wanting to make second-order transition temperature to reduce, then as its cost chemical durability variation often, because environment, exist lens preforming material surface to produce and burn, perhaps can not keep minute surface or near the situation of the state of minute surface.
The invention provides a kind of opticglass, it has comprehensively eliminated each defective that occurs on the aforementioned optical glass having high refractive index, and when keeping high refractive index, lower glass transition temperatures (Tg), have concurrently excellent chemical durability, be suitable for precision press molding.
In order to address the above problem, the inventor gos deep into experimental study repeatedly, found that, with TeO
2Composition is that the optical glass having high refractive index of main component can be realized desired optical characteristics and chemical durability.And then, by containing the R of specified amount
2The O composition (R be selected from the group that Li, Na, K, Cs form more than a kind), ZnO composition and Bi
2O
3Composition, also contain the Al of specified amount
2O
3And Ga
2O
3One side of composition or two sides when keeping specific refractory power, lower glass transition temperatures (Tg), can make and have excellent opticglass chemical durability, that be suitable for precision press molding concurrently.
Promptly, the 1st scheme of the present invention is a kind of opticglass, it is characterized in that, its specific refractory power (nd) is more than 1.9 and Abbe number (vd) is more than 15, second-order transition temperature (Tg) is below 300 ℃, do not contain Pb and/or As compound, and contain the above TeO of 50mol%
2Composition.
The 2nd scheme of the present invention is that it contains R according to the opticglass of aforementioned the 1st scheme
2O (R be selected from the group that Li, Na, K, Cs form more than a kind) composition, ZnO composition, Bi
2O
3Composition, and also contain Al
2O
3And/or Ga
2O
3Composition.
The 3rd scheme of the present invention is the opticglass according to the 1st scheme and the 2nd scheme, and it contains the following composition in the mol% of oxide compound benchmark:
TeO
250～90％、
R
2O (R be selected from the group that Li, Na, K, Cs form more than a kind) 5～30%,
ZnO1～30% He
Bi
2O
31～20％。
The 4th scheme of the present invention is according to the opticglass of the 1st～3 scheme, it is characterized in that, with Al
2O
3And Ga
2O
3Composition is the total content 100% of composition in addition, contains the Al of 0.01～3.0mol%
2O
3And/or Ga
2O
3Composition.
The 5th scheme of the present invention is according to the opticglass of aforementioned the 1st～4 scheme, it is characterized in that, the powder method water tolerance is 1 grade, 2 grades or 3 grades.
The 6th scheme of the present invention is the opticglass according to aforementioned the 1st～5 scheme, B
2O
3, GeO
2And P
2O
5Adding up to below the 5mol% of the containing ratio of composition.
The 7th scheme of the present invention is the opticglass according to aforementioned the 2nd～6 scheme, R
2O is by Li
2O and/or Na
2O becomes to be grouped into.
The 8th scheme of the present invention is the opticglass according to aforementioned the 1st～7 scheme, and it does not contain the F composition substantially.
The 9th scheme of the present invention is the opticglass according to aforementioned the 1st～8 scheme, and it contains as following each composition of composition arbitrarily in the mol% of oxide compound benchmark:
SiO
20～10% and/or
Li
2O 0～30% and/or
Na
2O 0～20% and/or
K
2O 0～15% and/or
Cs
2O 0～10% and/or
MgO 0～10% and/or
CaO 0～20% and/or
BaO 0～20% and/or
SrO 0～20% and/or
TiO
20～10% and/or
Nb
2O
50～10% and/or
Ta
2O
50～10% and/or
WO
30～10% and/or
ZrO
20～10% and/or
Y
2O
30～10% and/or
Yb
2O
30～10% and/or
La
2O
30～10% and/or
Gd
2O
30～10% and/or
Sb
2O
3 0～0.5％。
The 10th scheme of the present invention is the opticglass according to aforementioned the 1st～9 scheme, Y
2O
3, Yb
2O
3, La
2O
3And Gd
2O
3The not enough 10mol% of the total of the content of composition.
The 11st scheme of the present invention is a kind of optical element, and it carries out precision press molding by the opticglass with aforementioned the 1st～10 scheme and forms.
The 12nd scheme of the present invention is a kind of precision press molding preform, and its opticglass by aforementioned the 1st～10 scheme forms.
The 13rd scheme of the present invention is a kind of optical element, and it carries out precision press molding by the preform with aforementioned the 12nd scheme and forms.
According to the scheme of the invention described above, a kind of opticglass can be provided, it is an optical glass having high refractive index, has low-down second-order transition temperature (Tg), and the chemical durability excellence, is suitable for precision press molding.
Embodiment
Each composition for opticglass of the present invention describes.The containing ratio of each composition that is not particularly limited below is meant the mol% of oxide compound benchmark." oxide compound benchmark " is meant: in supposition as the oxide compound of the raw material of glass moiety of the present invention, composite salt, metal fluoride etc. when whole decomposition and inversion are oxide compound during in fusion, summation in the quality of this generation oxide compound is 100 quality %, the composition of each composition that is contained in the making glass.
TeO
2Composition is to have the composition that glass forms effect, must contain among the present invention.Yet it is measured when very few, is difficult to vitrifying, excessive containing sometimes, has as the easy unsettled harm of glass.Therefore, lower limit of the present invention is preferably 50%, more preferably 55%, most preferably is 60%, and the upper limit is preferably 90%, more preferably 85%, most preferably is 80%.
R
2O composition (R be selected from the group that Li, Na, K, Cs form more than a kind) is to have TeO
2The composition of the effect of easy vitrifying of composition and maintenance lower glass transition temperatures (Tg) is a composition useful among the present invention.Yet it is measured to exist when very few and forms the easy inadequate harm of glass, and then exist the harm that specific refractory power reduces easily, increased devitrification resistance increases easily excessive containing sometimes.Therefore, R among the present invention
2The lower limit of the total of O component content is preferably 5%, more preferably 7%, most preferably is 10%, and the upper limit is preferably 30%, more preferably 27%, most preferably is 25%.
Then, for R
2Each composition of O describes.
Li
2The O composition is to have TeO
2The composition of the effect of easy vitrifying of composition and maintenance lower glass transition temperatures (Tg).Yet, excessive containing sometimes, exist specific refractory power to reduce easily and the easy harm that increases of increased devitrification resistance.Li among the present invention
2O component content lower limit is preferably 1.0%, more preferably 3.0%, most preferably is 5.0%, and the upper limit is preferably 30%, more preferably 27%, most preferably is 25%.
Na
2The O composition is to have TeO
2The composition of the effect of easy vitrifying of composition and maintenance lower glass transition temperatures (Tg).Yet exist specific refractory power to reduce easily sometimes and the easy harm that increases of increased devitrification resistance excessive containing, and therefore also can not contain.Na among the present invention
2The O component content upper limit is preferably 20%, more preferably 17%, most preferably is 15%.
K
2The O composition is to have TeO
2The composition of the effect of easy vitrifying of composition and maintenance lower glass transition temperatures (Tg).Yet exist specific refractory power to reduce easily sometimes and the easy harm that increases of increased devitrification resistance excessive containing, and therefore also can not contain.Among the present invention, K
2The O component content upper limit is preferably 15%, more preferably 13%, most preferably is 10%.
Cs
2The O composition is to have TeO
2The composition of the easy vitrified effect of composition.Yet exist specific refractory power to reduce easily sometimes and the easy harm that increases of increased devitrification resistance excessive containing, and therefore also can not contain.Among the present invention, Cs
2The O composition upper limit is preferably 10.0%, more preferably 5.0%, most preferably is 3.0%.
In addition, R
2O is preferably by Li
2O and Na
2Either party in the O composition or two sides form.This is because other R
2O composition and Li
2O and Na
2The O composition is compared, and the increased devitrification resistance deterioration becomes remarkable than being easier to.
The ZnO composition is to have TeO
2The composition of the easy vitrified effect of composition is a composition useful among the present invention.Yet it is measured and exists when very few glass unstable easily, even excessive containing, increased devitrification resistance also increases easily, the harm that perhaps specific refractory power reduces, second-order transition temperature (Tg) uprises easily.Therefore, lower limit of the present invention is preferably 1%, more preferably 2%, most preferably is 3%, and the upper limit is preferably 30%, more preferably 27%, most preferably is 25%.
Bi
2O
3Composition has TeO
2The effect that easy vitrifying of composition and specific refractory power uprise is a composition useful among the present invention.Yet it is measured and exists when very few glass unstable easily, even excessive containing, increased devitrification resistance also increases easily, perhaps the harm that uprises easily of second-order transition temperature (Tg).Therefore lower limit of the present invention is preferably 1%, more preferably 2%, most preferably is 3%, and the upper limit is preferably 20%, more preferably 17%, most preferably is 15%.
Al
2O
3And Ga
2O
3Composition all is the compositions with effect of the increased devitrification resistance that suppresses glass, preferably contains either party or two sides.Yet it is insufficient easily that it measures the effect that exists when very few increased devitrification resistance to suppress, even excessive containing, increased devitrification resistance also increases easily, and then cause the harm that specific refractory power reduces, second-order transition temperature (Tg) rises easily.So Al among the present invention
2O
3And Ga
2O
3The total of component content is with Al
2O
3And Ga
2O
3The total content 100% of composition beyond the composition, lower limit is preferably 0.01%, more preferably 0.05%, most preferably is 0.1%, and the upper limit is preferably 3.0%, more preferably 2.0%, most preferably is 1.0%.
In addition, in this specification sheets, " with Al
2O
3And Ga
2O
3The Al of the total content 100% of composition beyond the composition
2O
3And Ga
2O
3Component content " be meant at supposition Al
2O
3And Ga
2O
3The total content of the oxide components beyond the composition is 100% o'clock Al
2O
3And Ga
2O
3The relative mass % of composition.
For each composition, Al
2O
3The composition upper limit is preferably 2.0%, more preferably 1.5%, most preferably is 1.0%.Ga
2O
3The upper limit is preferably 2.0%, more preferably 1.5%, most preferably is 1.0%.
Yet, TeO
2Composition can play the effect of network former in the opticglass of the present invention, but vitrifying is then very difficult separately.Therefore, preferably containing mentioned component (is R
2O, ZnO and Bi
2O
3Composition and Al
2O
3And Ga
2O
3One side of composition or two sides) more than at least a kind.In addition, by containing TeO simultaneously
2Composition and these compositions, obtain to possess more excellent stability easily, solvability, chemical durability, as the glass of the performance of opticglass.
B
2O
3, GeO
2And P
2O
5Composition is the composition that makes the specific refractory power reduction, improves second-order transition temperature (Tg), so its total metering upper limit is preferably 5.0%, more preferably 3.0%, most preferably is 1.0%.Wherein, all can not contain.
For B
2O
3, GeO
2And P
2O
5Each composition, the upper limit is preferably 5.0%, more preferably 3.0% respectively, most preferably is 1.0%.
The F composition is the composition that increased devitrification resistance is increased, and therefore is preferably 5%, more preferably 2%, does not most preferably contain.In addition, the oxide compound benchmark was stated in total metering that the content of F is replaced into the F of fluorochemical by part or all of the oxide compound that will constitute glass of the present invention among the present invention in the past, and to form 100 quality % be benchmark, and the quality % when calculating by the F atom represents.
SiO
2Composition is the composition with effect of improving increased devitrification resistance, so can contain arbitrarily among the present invention.Yet exist increased devitrification resistance to increase easily sometimes and specific refractory power reduces easily, second-order transition temperature (Tg) uprises easily harm excessive containing.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 5.0%, most preferably is 2.0%.
The MgO composition is the composition with effect of improving increased devitrification resistance, so can contain arbitrarily among the present invention.Yet exist increased devitrification resistance to increase easily sometimes and specific refractory power reduces easily, second-order transition temperature (Tg) uprises easily harm excessive containing.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 5.0%, most preferably is 2.0%.
The CaO composition is the composition with effect of improving increased devitrification resistance, so can contain arbitrarily among the present invention.Yet exist increased devitrification resistance to increase easily sometimes and specific refractory power reduces easily, second-order transition temperature (Tg) uprises easily harm excessive containing.Therefore among the present invention, the upper limit is preferably 20.0%, more preferably 7.0%, most preferably is 5.0%.
The BaO composition is the composition with effect of improving increased devitrification resistance, so can contain arbitrarily among the present invention.Yet exist increased devitrification resistance to increase easily sometimes and specific refractory power reduces easily, second-order transition temperature (Tg) uprises easily harm excessive containing.Therefore among the present invention, the upper limit is preferably 20.0%, more preferably 7.0%, most preferably is 5.0%.
The SrO composition is the composition with effect of improving increased devitrification resistance, so can contain arbitrarily among the present invention.Yet exist increased devitrification resistance to increase easily sometimes and specific refractory power reduces easily, second-order transition temperature (Tg) uprises easily harm excessive containing.Therefore among the present invention, the upper limit is preferably 20.0%, more preferably 7.0%, most preferably is 5.0%.
TiO
2Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
Nb
2O
5Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
Ta
2O
5Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
WO
3Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
ZrO
2Composition is the composition with effect of improving chemical durability, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, the upper limit is preferably 10.0%, more preferably 5.0%, most preferably is 2.0%.
Y
2O
3Composition is the composition with effect of improving chemical durability, so can contain arbitrarily among the present invention.Yet, the excessive harm that contains sometimes that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily.Therefore among the present invention, it always measures the upper limit and is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
Yb
2O
3Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, it always measures the upper limit and is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
La
2O
3Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, it always measures the upper limit and is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
Gd
2O
3Composition is the composition with the effect that improves specific refractory power, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, it always measures the upper limit and is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
By Y
2O
3, Yb
2O
3, La
2O
3And Gd
2O
3The rare-earth oxide composition of forming is the aforesaid any composition that improves chemical durability, improves the effect of specific refractory power that has.Yet, excessively have the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily when containing these compositions.Therefore among the present invention, it always measures the upper limit and is preferably 10.0%, more preferably 7.0%, most preferably is 5.0%.
Sb
2O
3Composition is the composition with effect of clarification, so can contain arbitrarily among the present invention.Yet exist the harm that increased devitrification resistance increases easily, second-order transition temperature (Tg) uprises easily excessive containing sometimes.Therefore among the present invention, the upper limit is preferably 0.5%, more preferably 0.4%, most preferably is 0.3%.
Then, describe for the composition that must contain in the opticglass of the present invention.
There are the following problems for lead compound: its be when precision press molding easily and the such problem of composition of mould fusion bonding; And not only make glass discarded until the cold working of the glass that grinds etc. and glass, and all needing to carry out the measure on the environmental cure, it is the problem of the big composition of carrying capacity of environment.Therefore should not contain lead compound in the opticglass of the present invention.
As
2O
3, cadmium and thorium composition all be that environment is produced harmful effect, the very large composition of carrying capacity of environment, therefore opticglass of the present invention is not to contain.
And then in the opticglass of the present invention, coloring components such as V, Cr, Mn, Fe, Co, Ni, Cu, Mo, Eu, Nd, Sm, Tb, Dy, Er reduce light transmittance easily, therefore preferably are substantially devoid of.Here, " be substantially devoid of " and be meant except the situation of sneaking into impurity and do not contain artificially.
The composition of glass component of the present invention is represented with mol%, therefore is not directly with quality % record expression.Satisfy the composition of representing with quality % that is present in each composition in the glass component of each characteristic of the presently claimed invention, it is formed in the oxide compound benchmark and gets approximately following value.
TeO
2 40～90％、
R
2O (R be selected from the group that Li, Na, K, Cs form more than a kind) 5～30%,
ZnO 1～20％
Bi
2O
31～50% He
With Al
2O
3And Ga
2O
3Total content 100%, the 0.005～3.0mol%Al of composition beyond the composition
2O
3And/or Ga
2O
3And
B
2O
3, GeO
2And P
2O
50～5%
SiO
20～10% and/or
Li
2O 0.5～10% and/or
Na
2O 0～10% and/or
K
2O 0～10% and/or
MgO 0～5% and/or
CaO 0～20% and/or
BaO 0～20% and/or
SrO 0～20% and/or
TiO
20～5% and/or
Nb
2O
50～20% and/or
Ta
2O
50～25% and/or
WO
30～15% and/or
ZrO
20～5% and/or
Y
2O
30～15% and/or
Yb
2O
30～25% and/or
La
2O
30～20% and/or
Gd
2O
30～10% and/or
Sb
2O
3 0～2％
Then, describe for the rerum natura of stipulating among the present invention.
Opticglass expectation specific refractory power of the present invention (nd) is more than 1.9 and Abbe number (vd) is more than 15.By having this optical constant, can tackle the market demands of the sheet number that for example reduces the lens in the photographic camera etc.
Second-order transition temperature is measured by the thermal expansion measurement of glass, and the high more expression forming temperature of second-order transition temperature is high more, promptly enlightens the lifetime of mould.Opticglass of the present invention preferably not only goes for existing supersteel molding jig, but also go for utilizing the precision press molding of the mould of stainless steel etc., therefore its second-order transition temperature is preferably below 300 ℃, more preferably below 295 ℃, most preferably is below 290 ℃.
Among the present invention, the index of chemical durability is used Japanese optics nitre industry meeting specification; The powder method water tolerance of stipulating among the JOGIS06-1999.When chemical durability excessively worsens, be difficult to as opticglass.Particularly consider when opticglass of the present invention is applicable to the lens preforming material, be preferably 1～3 grade, more preferably 1～2 grade, most preferably be 1 grade.
As previously mentioned, opticglass of the present invention can be used as the preforming material that compression moulding is used, and perhaps can directly suppress melten glass.As preforming material the time, its manufacture method and precision press molding method are not particularly limited, but can use known manufacture method and manufacturing process.Manufacture method as preforming material, for example the manufacture method and the manufacturing installation of the opticglass of putting down in writing among the manufacturing process of the glass gob of putting down in writing among the Japanese kokai publication hei 8-319124, the Japanese kokai publication hei 8-73229 are such, can directly make preforming material by melten glass, can also carry out the cold working manufacturing to plate glass or bar-shaped glass in addition.
Embodiment
Below, narration in an embodiment of the present invention, but the present invention is not limited to these embodiment.
(composition of No.1～No.11) is shown in table 1～3 with the result of the specific refractory power (nd) of these glass, Abbe number (vd), second-order transition temperature (Tg) with the embodiment of glass of the present invention.In the table, the composition of each composition is represented with mol%.
Table 1
Table 2
Table 3
According to the common opticglass of the ratio weighing oxide compound of the composition of each embodiment shown in table 1～table 3, oxyhydroxide, carbonate, nitrate etc. with raw material, mix, put into platinum or golden crucible, corresponding to the meltbility of forming, under 500～1000 ℃ with after fusion, clarification in 30 minutes～5 hours, stirring, homogenize, be poured into mould etc. and slowly cooling, can obtain the opticglass (No.1～No.11) of the embodiments of the invention shown in table 1～table 3 thus.
Specific refractory power (nd) and Abbe number (vd) are measured the opticglass that obtains with cooling rate-25 ℃/hour slow cooling.
Second-order transition temperature (Tg) can the middle method of putting down in writing of specification JOJIS08-2003 (measuring method of the thermal expansion of opticglass) be measured by Japanese optics nitre industry.Wherein, coupons is used the sample of long 50mm, diameter 4mm.
The water-proof level value of expression powder method is by Japanese optics nitre industry meeting specification; JOGIS06-1999, following trying to achieve.The glass of embodiment (No.1～11) is broken for granularity 425～600 μ m, the proportion gram number of the glass specimen of weighing fragmentation, and put into the platinum cage, the platinum cage is put into flask at the bottom of the silica glass rounding that pure water (pH6.5-7.5) is housed, after in the boiling water-bath, handling 60 minutes, calculate the reduction rate (%) of the glass specimen after the processing, with reduction rate less than 0.05% as 1 grade, with reduction rate less than 0.05～0.10% as 2 grades, with reduction rate less than 0.10～0.25% as 3 grades, progression is more little, means that the water tolerance of glass is excellent more.
Shown in table 1～table 3, the opticglass of embodiments of the invention (No.1～11) all has the interior optical constant of aforementioned range, and (specific refractory power (nd) and Abbe number (vd), second-order transition temperature (Tg) are in the scope below 300 ℃, thereby be suitable for precision modulding compression moulding under the low temperature, and then the powder method water tolerance is good, so chemical durability is also excellent, the applicable lens preforming material that is used for precision press molding.
Utilizability on the industry
Optical glass of the present invention is optical glass having high refractive index, and it has low-down Therefore glass transition temperature (Tg) and chemical durability excellence are used for The lens preformed material of precision press molding.
Claims (13)
1. an opticglass is characterized in that, its specific refractory power (nd) is more than 1.9 and Abbe number (vd) is more than 15, second-order transition temperature (Tg) is below 300 ℃, does not contain Pb and/or As compound, contains the above TeO of 50mol%
2Composition.
2. opticglass according to claim 1, it contains R
2O (R be selected from the group that Li, Na, K, Cs form more than a kind) composition, ZnO composition, Bi
2O
3Composition, and also contain Al
2O
3And/or Ga
2O
3Composition.
3. opticglass according to claim 1 and 2, it contains following each composition in the mol% of oxide compound benchmark:
TeO
2 50～90％、
R
2O (R be selected from the group that Li, Na, K, Cs form more than a kind) 5～30%,
ZnO 1～30% He
Bi
2O
3 1～20％。
4. according to each described opticglass of claim 1～3, it is characterized in that, with Al
2O
3And Ga
2O
3Composition is the total content 100% of composition in addition, contains the Al of 0.01～3.0mol%
2O
3And/or Ga
2O
3Composition.
5. according to each described opticglass of claim 1～4, it is characterized in that the powder method water tolerance is 1 grade, 2 grades or 3 grades.
6. according to each described opticglass of claim 1～5, B
2O
3, GeO
2And P
2O
5Adding up to below the 5mol% of the containing ratio of composition.
7. according to each described opticglass of claim 2～6, R
2The O composition is by Li
2O and/or Na
2O becomes to be grouped into.
8. according to each described opticglass of claim 1～7, it is substantially devoid of the F composition.
9. according to each described opticglass of claim 1～8, in the mol% of oxide compound benchmark, it contains following each composition as any composition:
SiO
20～10% and/or
Li
2O 0～30% and/or
Na
2O 0～20% and/or
K
2O 0～15% and/or
Cs
2O 0～10% and/or
MgO 0～10% and/or
CaO 0～20% and/or
BaO 0～20% and/or
SrO 0～20% and/or
TiO
20～10% and/or
Nb
2O
550～10% and/or
Ta
2O
550～10% and/or
WO
30～10% and/or
ZrO
20～10% and/or
Y
2O
30～10% and/or
Yb
2O
30～10% and/or
La
2O
30～10% and/or
Gd
2O
30～10% and/or
Sb
2O
3 0～0.5％。
10. according to each described opticglass of claim 1～9, Y
2O
3, Yb
2O
3, La
2O
3And Gd
2O
3The not enough 10mol% of the total of the content of composition.
11. an optical element, it forms by each described opticglass of claim 1～10 is carried out precision press molding.
12. a precision press molding preform, it is formed by each described opticglass of claim 1～10.
13. an optical element, it carries out precision press molding by the preform with claim 12 and forms.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP288068/2006 | 2006-10-23 | ||
| JP2006288068A JP5288578B2 (en) | 2006-10-23 | 2006-10-23 | Optical glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101568496A true CN101568496A (en) | 2009-10-28 |
Family
ID=39324606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800478350A Pending CN101568496A (en) | 2006-10-23 | 2007-10-18 | Optical glass |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5288578B2 (en) |
| CN (1) | CN101568496A (en) |
| TW (1) | TW200838821A (en) |
| WO (1) | WO2008050819A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913768A (en) * | 2010-08-20 | 2010-12-15 | 中国建筑材料科学研究总院 | Hydroxyl-removal and no-devitrification multispectral transmission barium-gallium-germanium glass |
| CN103058517A (en) * | 2011-10-21 | 2013-04-24 | 汪国年 | Infrared optical glass for precise compression molding |
| CN107690423A (en) * | 2015-05-22 | 2018-02-13 | 法国亿讯电缆集团 | Glass composition for the sealing of miniature D connectors |
| CN111977968A (en) * | 2020-09-07 | 2020-11-24 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7754629B2 (en) * | 2006-11-30 | 2010-07-13 | Corning Incorporated | Phosphotellurite-containing glasses, process for making same and articles comprising same |
| CN101646630B (en) * | 2007-06-27 | 2014-06-18 | 株式会社尼康 | Glass composition and optical member and optical instrument using the same |
| JP2009286673A (en) * | 2008-05-30 | 2009-12-10 | Ohara Inc | Optical glass, preform and optical element |
| JP4948569B2 (en) * | 2008-06-27 | 2012-06-06 | Ｈｏｙａ株式会社 | Optical glass |
| JP5823859B2 (en) * | 2009-04-28 | 2015-11-25 | 株式会社オハラ | Optical glass, optical element and precision press molding preform |
| US10191186B2 (en) | 2013-03-15 | 2019-01-29 | Schott Corporation | Optical bonding through the use of low-softening point optical glass for IR optical applications and products formed |
| DE102013226636A1 (en) | 2013-12-19 | 2015-06-25 | Friedrich-Schiller-Universität Jena | Glass composition, device and method of making a device |
| JP7163929B2 (en) * | 2017-10-20 | 2022-11-01 | 株式会社ニコン | Optical glass, optical element, optical system, optical device, interchangeable camera lens, acousto-optic device, lighting device, microscope |
| JPWO2022195838A1 (en) * | 2021-03-19 | 2022-09-22 | ||
| FR3141693A1 (en) | 2022-11-08 | 2024-05-10 | Axon Cable | GLASSES FOR MINIATURE HERMETIC CONNECTOR |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62108741A (en) * | 1985-11-08 | 1987-05-20 | Ohara Inc | Production of optical element |
| JP3730775B2 (en) * | 1997-02-14 | 2006-01-05 | 日本電信電話株式会社 | Tellurite glass, optical amplifier and light source using the tellurite glass |
| JP2004043294A (en) * | 2002-05-22 | 2004-02-12 | Asahi Glass Co Ltd | Optical glass and lens |
| JP2004035335A (en) * | 2002-07-04 | 2004-02-05 | Okamoto Glass Co Ltd | Glass, method of manufacturing glass and optical device |
-
2006
- 2006-10-23 JP JP2006288068A patent/JP5288578B2/en not_active Expired - Fee Related
-
2007
- 2007-10-09 TW TW96137882A patent/TW200838821A/en unknown
- 2007-10-18 CN CNA2007800478350A patent/CN101568496A/en active Pending
- 2007-10-18 WO PCT/JP2007/070768 patent/WO2008050819A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913768A (en) * | 2010-08-20 | 2010-12-15 | 中国建筑材料科学研究总院 | Hydroxyl-removal and no-devitrification multispectral transmission barium-gallium-germanium glass |
| CN101913768B (en) * | 2010-08-20 | 2012-11-21 | 中国建筑材料科学研究总院 | Hydroxyl-removal and no-devitrification multispectral transmission barium-gallium-germanium glass |
| CN103058517A (en) * | 2011-10-21 | 2013-04-24 | 汪国年 | Infrared optical glass for precise compression molding |
| CN107690423A (en) * | 2015-05-22 | 2018-02-13 | 法国亿讯电缆集团 | Glass composition for the sealing of miniature D connectors |
| CN107690423B (en) * | 2015-05-22 | 2021-02-19 | 法国亿讯电缆集团 | Glass composition for micro-D connector sealing |
| CN111977968A (en) * | 2020-09-07 | 2020-11-24 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5288578B2 (en) | 2013-09-11 |
| JP2008105869A (en) | 2008-05-08 |
| WO2008050819A1 (en) | 2008-05-02 |
| TW200838821A (en) | 2008-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101568496A (en) | Optical glass | |
| CN1935717B (en) | Optical glass for high-refractivity low dispersion precision die mould | |
| CN102320738B (en) | Optical glass | |
| KR100890588B1 (en) | Optical glass | |
| JP4590386B2 (en) | Optical glass | |
| JP3943348B2 (en) | Optical glass | |
| JP5174368B2 (en) | Optical glass | |
| JP4746995B2 (en) | Optical glass | |
| CN101218183B (en) | Optical glass | |
| JP5570054B2 (en) | Optical glass | |
| CN101184700B (en) | Optical glass | |
| CN102372430A (en) | Optical glass and optical element | |
| CN103717542A (en) | Optical glass | |
| CN101107202A (en) | Glass | |
| JP4993872B2 (en) | Optical glass | |
| CN101337768A (en) | Optical glass with high refractive index | |
| CN102167508A (en) | Optical glass with high refraction index and manufacturing method thereof | |
| JP5616566B2 (en) | Optical glass | |
| JP4703168B2 (en) | Optical glass | |
| CN102765879A (en) | Optical glass with high refractive index and manufacturing method thereof | |
| JP4889949B2 (en) | Optical glass | |
| CN101935164A (en) | Optical glass, preforming material and optical element | |
| JP3157458B2 (en) | Optical glass for mold press | |
| JP4289450B2 (en) | Optical glass | |
| CN103459339A (en) | Optical glass, preform, and optical element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20091028 |