CN102241479A - Manufacture method of optical glass, optical element and glass shaped body - Google Patents
Manufacture method of optical glass, optical element and glass shaped body Download PDFInfo
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- CN102241479A CN102241479A CN2011101134387A CN201110113438A CN102241479A CN 102241479 A CN102241479 A CN 102241479A CN 2011101134387 A CN2011101134387 A CN 2011101134387A CN 201110113438 A CN201110113438 A CN 201110113438A CN 102241479 A CN102241479 A CN 102241479A
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- opticglass
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Abstract
The invention provides a manufacture method of an optical glass, an optical element and a glass shaped body, wherein the refractive index (nd) and Abbe number (vd) of the optical glass fall into a desirable scope even the optical glass does not contain a large amount of Ta 205 and Nb205. The optical glass, relative to glass total mass converted into oxides, contains, by mass %, 10.0-40.0% of La203, 10.0-40.0% of B203, 0-15.0% of Si02, 0-20.0% of Nb205 and 0-10.0% of Ti02. The refractive index (nd) of the optical glass is 1.75-1.95, and the Abbe number (vd) is 30-40.
Description
Technical field
The present invention relates to the manufacture method of opticglass, optical element and glass forming body.
Background technology
In recent years, the digitizing of optics instrument, height become more meticulous and just sharply develop, and the lightweight of optical elements such as lens that use in the various optical devices such as the reconstructions of image such as photographic equipments such as logarithmic code camera, pick up camera, projector, projection TV (projection) equipment and prism and the requirement of miniaturization are strong all the more.
Making in the middle of the opticglass of optical element, particularly can realize the lightweight of optical element and miniaturization, have specific refractory power (nd) more than 1.75, the demand of high-refractivity and low-dispersion glass with the Abbe number (ν d) more than 30 is very high.As such high-refractivity and low-dispersion glass, can enumerate the glass of the glass composition of record in the patent documentation 1～3.Specifically, for example put down in writing in the patent documentation 1 and 2 specific refractory power (nd) more than 1.69 and below 1.85, Abbe number (ν d) is in the scope more than 34 and below 51 and do not use ThO
2Opticglass with CdO.In addition, put down in writing in the patent documentation 3 specific refractory power (nd) more than 1.6 and below 1.8, the opticglass of Abbe number (ν d) in the scope more than 40 and below 60.
The prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication sho 48-059116 communique
Patent documentation 2: Japanese kokai publication sho 52-103412 communique
Patent documentation 3: TOHKEMY 2004-161506 communique
Summary of the invention
The problem that invention will solve
As the manufacture method of such optical element, make with the following method: to glass material reheat and moulding (type is made in hot repressing) and the glass ware forming product that obtain grind and cut abrasive method; To gob or glass block are cut off and grind the preform material that obtains or by the known floating preform material of going up moulding such as moulding carry out reheat, with the method (precision press molding) of mould extrusion forming with high-precision molding surface.
But, as the glass of record in the patent documentation 1～3,, need contain a large amount of Ta in order to realize the low dispersion area of high refraction and to obtain can be used as the transmissivity that opticglass uses
2O
5And Nb
2O
5For this reason, this regional glass often has the requirement that reduces cost.
The present invention finishes in view of the above problems, its purpose is, provide specific refractory power (nd) and Abbe number (ν d) in specific scope, and have the opticglass of high thermostability, the manufacture method of the optical element that forms by this opticglass and the glass forming body that forms by this opticglass.
The method that is used to deal with problems
The inventor furthers investigate repeatedly in order to address the above problem, find by and use La
2O
3Composition and B
2O
3Composition and with SiO
2Composition, Nb
2O
5Composition and TiO
2Composition is suppressed at below the specific containing ratio, even if do not contain a large amount of Ta
2O
5And Nb
2O
5, also can have the transmissivity that can be used as the opticglass use, and finish the present invention.
The present invention is following (1)～(7).
(1) a kind of opticglass, it, contains in quality % with respect to forming the glass total mass that converts with oxide compound:
La
2O
3Composition 10.0～40.0%,
B
2O
3Composition 10.0～40.0%,
SiO
2Composition 0～15.0%,
Nb
2O
5Composition 0～20.0% and
TiO
2Composition 0～10.0%,
This opticglass has 1.75～1.95 specific refractory power (nd), and has 30～40 Abbe number (ν d).
(2) above-mentioned (1) described opticglass wherein, is formed the mass ratio (Nb that converts with oxide compound
2O
5+ TiO
2)/(SiO
2+ B
2O
3) be below 1.0.
(3) above-mentioned (1) or (2) described opticglass, it, further contains in quality % with respect to forming the glass total mass that converts with oxide compound:
ZnO composition 5.0～20.0% and/or
ZrO
2Composition 0～15.0% and/or
Al
2O
3Composition 0～5.0% and/or
BaO composition 0～20.0% and/or
WO
3Composition 0～10.0% and/or
Na
2O composition 0～5.0% and/or
K
2O composition 0～5.0% and/or
Li
2O composition 0～5.0% and/or
Y
2O
3Composition 0～5.0% and/or
Gd
2O
3Composition 0～5.0% and/or
Yb
2O
3Composition 0～5.0% and/or
SrO composition 0～5.0% and/or
CaO composition 0～5.0% and/or
Sb
2O
3Composition 0～1.0%.
(4) a kind of optical element, it is formed by each described opticglass in above-mentioned (1)～(3).
(5) a kind of precision press molding preform, it is formed by each described opticglass in above-mentioned (1)～(3).
(6) a kind of optical element, it forms above-mentioned (5) described precision press molding with the preform precision press molding.
(7) a kind of manufacture method of glass forming body, it makes in above-mentioned (1)～(3) each described opticglass softening and be pressed in mould.
The invention effect
According to the present invention, by and use La
2O
3Composition and B
2O
3Composition and with SiO
2Composition, Nb
2O
5Composition and TiO
2Composition is suppressed at below the specific containing ratio, even if can obtain not containing a large amount of Ta
2O
5And Nb
2O
5Specific refractory power (nd) and Abbe number (ν d) are also in desired scope and the opticglass of transmissivity excellence.
Embodiment
Below the reason that limits the compositing range of each composition in the opticglass of the present invention is as described above like that described.In addition, in this specification sheets, short of special qualification, the containing ratio of each composition is represented with quality %.
Opticglass of the present invention with respect to forming the glass total mass that converts with oxide compound, in quality %, contains: La
2O
3Composition 10.0～40.0%, B
2O
3Composition 10.0～40.0%, SiO
2Composition 0～15.0%, Nb
2O
5Composition 0～20.0%, TiO
2Composition 0～10.0%, this opticglass have 1.75～1.95 specific refractory power (nd), and have 30～40 Abbe number (ν d).By containing B in above-mentioned scope
2O
3Composition has improved the specific refractory power of glass when improving the thermostability of glass.In addition, by containing La in above-mentioned scope
2O
3Composition, thus the specific refractory power and the Abbe number of glass can be adjusted.And then, by and use B
2O
3Composition and La
2O
3Composition and with SiO
2Composition, Nb
2O
5Composition and TiO
2Composition is suppressed in the above-mentioned scope, can take into account low dispersion property of high refraction and high-transmission rate characteristic.
Below, the embodiment of opticglass of the present invention is elaborated, but the present invention is not limited to following embodiment, can suitably change to implement in the scope of purpose of the present invention.
[glass ingredient]
Below statement constitutes the compositing range of each composition of opticglass of the present invention.In this specification sheets, short of special qualification, the containing ratio of each composition is with respect to the quality % that forms the glass total mass that converts with oxide compound.Here, " form with oxide compound convert " is meant: all decomposing during as fusions such as the oxide compound of the raw material of glass constituent of the present invention, composite salt, metal fluorides and when becoming oxide compound in hypothesis, is the composition of 100 quality % each composition of representing in the glass to be contained with the total mass of this generation oxide compound.
＜about neccessary composition, any composition 〉
La
2O
3Thereby being the chromatic dispersion that improves the specific refractory power of glass, reduce glass simultaneously, composition increases the composition of the Abbe number of glass.Particularly, by making La
2O
3The containing ratio of composition is more than 10.0%, can improve the specific refractory power of glass.On the other hand, by making La
2O
3The containing ratio of composition is below 40.0%, thereby can improve the devitrification of the stability reduction glass of glass.
Therefore, with respect to forming the glass total mass that converts with oxide compound, La
2O
3Be limited to 10.0% under the containing ratio of composition, be preferably 15.0%, more preferably 20.0%, more preferably 25.0%, more preferably 29.0%, on be limited to 40.0%, be preferably 37.0%, more preferably 36.0% and then be preferably 32.0%.
Can use for example La
2O
3, La (NO
3)
3XH
2O (X for integer) arbitrarily etc. makes La as raw material
2O
3Composition is contained in the glass.
B
2O
3Composition is the composition that promotes to form stable glass and give the glass high thermal stability.Particularly, by making B
2O
3The containing ratio of composition is more than 10.0%, can improve the stability of glass.On the other hand, by making B
2O
3The containing ratio of composition is below 40.0%, can obtain bigger specific refractory power easily.
Therefore, with respect to forming the glass total mass that converts with oxide compound, B
2O
3Be limited to 10.0% under the containing ratio of composition, be preferably 15.0%, more preferably 18.0% and then be preferably 20.0%, on be limited to 40.0%, be preferably 35.0%, more preferably 30.0%, more preferably 26.0% and then be preferably 25.0%.
Can use for example H
3BO
3, Na
2B
4O
7, Na
2B
4O
710H
2O, BPO
4Deng making B as raw material
2O
3Composition is contained in the glass, preferably with H
3BO
3Form introduce B
2O
3Composition.
SiO
2Composition is promote to form stable glass, and reduce as the opticglass composition of preferred devitrification (generation of crystallisate) not, is any composition in opticglass of the present invention.Particularly, by making SiO
2The containing ratio of composition is below 15.0%, can obtain targeted refractive index of the present invention easily.
Therefore, with respect to forming the glass total mass that converts with oxide compound, SiO
2Be limited to 15.0% on the containing ratio of composition, be preferably 10.0%, more preferably 3.7%.In addition, lower limit is preferably 0.5%, more preferably 1.0% and then be preferably 1.5%.
Can use for example SiO
2, K
2SiF
6, Na
2SiF
6Deng making SiO as raw material
2Composition is contained in the glass.
Nb
2O
5Composition is the composition that improves the specific refractory power of glass and make stabilization, is any composition in opticglass of the present invention.Particularly, by making Nb
2O
5The containing ratio of composition is below 20.0%, the rising of the melting temperature (Tm) in the time of can suppressing the glass manufacturing.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Nb
2O
5Be limited to 20.0% on the containing ratio of composition, be preferably 16.0%, more preferably 15.0%, more preferably 12.0% and then be preferably 10.0%.In addition, Nb
2O
5Composition is owing to be the high price material, thereby is preferably 2.0%, more preferably 5.0%, more preferably 7.0% and then be preferably 9.0% for the lower limit that reduces cost.
Can use for example Nb
2O
5Become to grade and make Nb as raw material
2O
5Composition is contained in the glass.
TiO
2Composition is to adjust the specific refractory power of glass and the composition of Abbe number, is any composition in opticglass of the present invention.Usually, TiO
2The reason that is considered to make transmissivity to worsen is below 10.0% by becoming phase separation balanced with other and making containing ratio, can reduce glass painted, particularly improve the transmissivity of the glass of visible region.
Therefore, with respect to forming the glass total mass that converts with oxide compound, TiO
2Be limited to 10.0% on the containing ratio of composition, be preferably 7.0%, more preferably 5.0%.In addition, lower limit is preferably 1.0%, more preferably 2.0% and then be preferably 3.0%.
Can use for example TiO
2Become to grade and make TiO as raw material
2Composition is contained in the glass.
In the opticglass of the present invention, preferred Nb
2O
5Composition and TiO
2The containing ratio sum of composition is with respect to SiO
2Composition and B
2O
3The ratio of composition sum, promptly form the mass ratio (Nb that converts with oxide compound
2O
5+ TiO
2)/(SiO
2+ B
2O
3) be below 1.0.By making this mass ratio is below 1.0, forms the Nb of the nuclei of crystallization easily
2O
5Composition and TiO
2The containing ratio of composition relatively reduces, and the nucleus that formed before obtaining glass reduces, therefore, and the opacification and the devitrification of glass in the time of can reducing in order to carry out hot repressing to make type, precision press molding the opticglass reheat.
The mass ratio that composition converts with oxide compound is (Nb
2O
5+ TiO
2)/(SiO
2+ B
2O
3) on be limited to 1.0, be preferably 0.9, more preferably 0.8, more preferably 0.7 and then be preferably 0.6, lower limit is preferably 0.1, more preferably 0.2, more preferably 0.3 and then be preferably 0.4.This mass ratio is 0.1 when above, can further improve the specific refractory power of glass.
The ZnO composition is the composition that improves glass melting, is any composition in opticglass of the present invention.Particularly, be below 20.0% by the containing ratio that makes the ZnO composition, can obtain the high thermal stability of glass easily.
Therefore, with respect to forming the glass total mass that converts with oxide compound, the containing ratio upper limit of ZnO composition is preferably 20.0%, more preferably 18.0% and then be preferably 17.0%, and lower limit is preferably 5.0%, more preferably 8.0%, more preferably 10.0%, more preferably 12.0%, more preferably 13.0% and then be preferably 15.0%.
Can use for example ZnO, ZnF
2Deng the ZnO composition being contained in the glass as raw material.
ZrO
2Composition is the specific refractory power that improves glass, the composition that improves devitrification resistance, is any composition in opticglass of the present invention.Particularly, be ZrO by making difficult molten component
2The containing ratio of composition is below 15.0%, the rising of the melting temperature (Tm) in the time of can suppressing the glass manufacturing, reduction power loss.
Therefore, with respect to forming the glass total mass that converts with oxide compound, ZrO
2The containing ratio upper limit of composition is preferably 15.0%, more preferably 10.0% and then be preferably 8.0%.In addition, ZrO
2The containing ratio of composition is not as long as then unfavorable especially technically in this scope, and when obtaining above-mentioned effect easily, lower limit is preferably 0.5%, more preferably 2.0%, more preferably 3.0%, more preferably 5.0% and then be preferably 6.0%.
Can use for example ZrO
2, ZrF
4Deng making ZrO as raw material
2Composition is contained in the glass.
Al
2O
3Composition is the composition that improves the chemical durability of glass and improve the devitrification resistance of melten glass, is any composition in opticglass of the present invention.Particularly, by making Al
2O
3The containing ratio of composition is below 5.0%, the stability of the tendency towards devitrification of the glass that can weaken, raising glass.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Al
2O
3The containing ratio upper limit of composition is preferably 5.0%, more preferably 4.0%, more preferably 3.0% and then be preferably 2.0%.In addition, as long as Al
2O
3The containing ratio of composition is then not unfavorable especially technically in this scope, and when obtaining above-mentioned effect easily, lower limit is preferably 0.05%, more preferably 0.1%, more preferably 0.2%, more preferably 0.3% and then be preferably 0.5%.
Can use for example Al
2O
3, Al (OH)
3, AlF
3Deng making Al as raw material
2O
3Composition is contained in the glass.
The BaO composition is the composition of adjusting the specific refractory power of glass and improving the increased devitrification resistance of glass, is any composition in opticglass of the present invention.Particularly, be below 20.0% by the containing ratio that makes the BaO composition, can obtain desired specific refractory power easily.
Therefore, with respect to forming the glass total mass that converts with oxide compound, the containing ratio upper limit of BaO composition is preferably 20.0%, more preferably 13.0%, more preferably 9.0% and then be preferably 7.0%.In addition, lower limit is preferably 1.0%, more preferably 2.0%, more preferably 5.0% and then be preferably 6.0%.
Can use for example BaCO
3, Ba (NO
3)
2, BaF
2Deng the BaO composition being contained in the glass as raw material.
WO
3Composition is the composition of adjusting the specific refractory power and the chromatic dispersion of glass and improving the devitrification resistance of glass, is any composition in opticglass of the present invention.Particularly, by making WO
3The containing ratio of composition is below 10.0%, can reduce glass painted, particularly be difficult to reduce the transmissivity of visible light-short wavelength zone (not enough 500nm).
Therefore, with respect to forming the glass total mass that converts with oxide compound, WO
3The containing ratio upper limit of composition is preferably 10.0%, more preferably 5.0% and then be preferably 1.0%.In addition, preferred WO
3The containing ratio less than 1.0% of composition does not more preferably contain WO in fact
3Composition.
Can use for example WO
3Deng making WO as raw material
3Composition is contained in the glass.
Sb
2O
3Composition is the composition with the melten glass deaeration, is any composition in opticglass of the present invention.Particularly, by making Sb
2O
3The containing ratio of composition is below 1.0%, is difficult for excessively foaming Sb when glass melting
2O
3Composition is difficult for and fusion equipment precious metals such as (particularly) Pt alloying.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Sb
2O
3The containing ratio upper limit of composition is preferably 1.0%, more preferably 0.7%, more preferably 0.5%, more preferably 0.2% and then be preferably 0.1%.
Can use for example Sb
2O
3, Sb
2O
5, Na
2H
2Sb
2O
75H
2O etc. make Sb as raw material
2O
3Composition is contained in the glass.
Li
2The O composition is the composition of the devitrification when improving glass melting and reducing the glass reheat, is any composition in opticglass of the present invention.Particularly, by making Li
2The containing ratio of O composition is below 5.0%, be difficult for to reduce glass specific refractory power, can improve the stability of glass and reduce the generation of devitrification etc.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Li
2The containing ratio upper limit of O composition is preferably 5.0%, more preferably 4.0%, more preferably 3.0%, more preferably 2.0%, more preferably 1.0% and then be preferably 0.5%.
Can use for example Li
2CO
3, LiNO
3, LiF etc. makes Li as raw material
2The O composition is contained in the glass.
Na
2The O composition is the composition of the devitrification when improving glass melting and reducing the glass reheat, is any composition in opticglass of the present invention.Particularly, by making Na
2The containing ratio of O composition is below 10.0%, be difficult for to reduce glass specific refractory power, can improve the stability of glass and reduce the generation of devitrification etc.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Na
2The containing ratio upper limit of O composition is preferably 10.0%, more preferably 7.0% and then be preferably 5.0%.
Can use for example Na
2CO
3, NaNO
3, NaF, Na
2SiF
6Deng making Na as raw material
2The O composition is contained in the glass.
K
2The O composition is to improve glass melting and adjust the specific refractory power of glass and the composition of Abbe number, is any composition in opticglass of the present invention.Particularly, by making K
2The containing ratio of O composition is below 10.0%, be difficult for to reduce glass specific refractory power, can improve the stability of glass and reduce the generation of devitrification etc.
Therefore, with respect to forming the glass total mass that converts with oxide compound, K
2The containing ratio upper limit of O composition is preferably 10.0%, more preferably 7.0% and then be preferably 5.0%.
Can use for example K
2CO
3, KNO
3, KF, KHF
2, K
2SiF
6Deng making K as raw material
2The O composition is contained in the glass.
The MgO composition is a composition of adjusting the specific refractory power of glass, is any composition in opticglass of the present invention.Particularly, be below 10.0% by the containing ratio that makes the MgO composition, can obtain desired specific refractory power easily and reduce the generation of glass devitrification.
Therefore, with respect to forming the glass total mass that converts with oxide compound, the containing ratio upper limit of MgO composition is preferably 10.0%, more preferably 7.0% and then be preferably 5.0%.
Can use for example MgCO
3, MgF
2Deng the MgO composition being contained in the glass as raw material.
The CaO composition is the composition that improves glass melting, is any composition in opticglass of the present invention.Particularly, be below 15.0% by the containing ratio that makes the CaO composition, can obtain desired specific refractory power easily and reduce the generation of glass devitrification.
Therefore, with respect to forming the glass total mass that converts with oxide compound, the containing ratio upper limit of CaO composition is preferably 15.0%, more preferably 10.0% and then be preferably 5.0%.
Can use for example CaCO
3, CaF
2Deng the CaO composition being contained in the glass as raw material.
The SrO composition is the composition of adjusting the specific refractory power of glass and improving the increased devitrification resistance of glass, is any composition in opticglass of the present invention.Particularly, be below 15.0% by the containing ratio that makes the SrO composition, can obtain the generation of desired specific refractory power, reduction glass devitrification easily.
Therefore, with respect to forming the glass total mass that converts with oxide compound, the containing ratio upper limit of SrO composition is preferably 15.0%, more preferably 10.0% and then be preferably 5.0%.
Can use for example Sr (NO
3)
2, SrF
2Deng the SrO composition being contained in the glass as raw material.
Ta
2O
5Composition is the composition that improves the specific refractory power of glass and make stabilization, is any composition in opticglass of the present invention.Particularly, by making Ta
2O
5The containing ratio of composition is below 15.0%, and having reduced the rare mineral resource is Ta
2O
5Therefore the usage quantity of composition, can reduce the material cost of glass.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Ta
2O
5The containing ratio upper limit of composition is preferably 15.0%, more preferably 10.0% and then be preferably 7.0%.
Can use for example Ta
2O
5Deng making Ta as raw material
2O
5Composition is contained in the glass.
Ln
2O
3Composition (Ln is at least a kind that is selected from the group of being made up of Y, Gd and Yb) is to adjust the specific refractory power of glass and the composition of chromatic dispersion, is any composition in opticglass of the present invention.Particularly, by making Y
2O
3, Gd
2O
3And Yb
2O
3The containing ratio of each composition be respectively below 30.0%, can obtain the desired optical constant of glass easily and improve the devitrification resistance of glass.
Therefore, with respect to forming the glass total mass that converts with oxide compound, Y
2O
3, Gd
2O
3And Yb
2O
3The containing ratio upper limit of each composition be preferably 30.0%, more preferably 20.0%, more preferably 10.0% and then be preferably 5.0% respectively.
Can use for example Y
2O
3, Gd
2O
3, Yb
2O
3Deng making Ln as raw material
2O
3Composition is contained in the glass.
SnO composition and SnO
2Thereby composition is the oxidation that reduces liquation glass makes the melten glass clarification, be difficult for making glass to the composition that light-struck transmissivity worsens, and is any composition in opticglass of the present invention.Particularly, make SnO composition and SnO
2The containing ratio of composition is respectively 1.0% when following, and then melten glass is difficult for producing because the glass coloring due to the reduction can make SnO composition and SnO
2Composition is difficult for and fusion equipment precious metals such as (particularly) Pt alloying.
Therefore, with respect to forming the glass total mass that converts with oxide compound, SnO composition and SnO
2The containing ratio upper limit of composition is preferably 1.0%, more preferably 0.7% and then be preferably 0.5% respectively.
Can use for example SnO, SnO
2, SnF
2, SnF
4Deng make SnO composition and SnO as raw material
2Composition is contained in the glass.
CeO
2Composition is the composition that makes glass clarifyingization, is any composition in opticglass of the present invention.Particularly, make CeO
2Composition is 1.0% when following, can suppress the painted of visible light.
Therefore, form the glass total mass that converts and convert with oxide compound with oxide compound, CeO with respect to forming
2The containing ratio upper limit of composition is preferably 1.0%, more preferably 0.7% and then be preferably 0.5% respectively.
Can use for example CeO
2, Ce (OH)
3Deng making CeO as raw material
2Composition is contained in the glass.
＜composition〉about not containing
Then, composition that should not contain in the opticglass of the present invention and the composition that does not preferably contain are described.
In the scope of the characteristic that does not diminish opticglass of the present invention, can contain other composition.Wherein, each transition metal composition such as the V except Ti, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo, owing to have separately with a small amount of independent or compoundly contain sometimes that glass also can produce the character that absorbs by specific wavelength painted, in the visible region, therefore, particularly in the opticglass of the wavelength that uses the visible region, preferably do not contain these transition metal compositions in fact.
In addition, lead compound and As such as PbO
2O
3Deng arsenic compound, owing to be the high composition of environmental pressure, unless therefore preferably do not contain these compounds in fact, promptly to sneak into not conform in addition with keeping away these compounds are arranged.Thus, even if do not take special environmental cure measure, also can make, process, discard this opticglass.
And then each composition of Th, Cd, Tl, Os, Be and Se is not only the manufacturing process of glass in the tendency that has control to use as detrimental substance in recent years, even in the disposal after manufacturing procedure, commercialization, also needs to take the measure on the environmental cure.Therefore, during influencing on paying attention to environment, preferably do not contain these compositions in fact.
The composition of opticglass of the present invention is because to represent with respect to the quality % that forms the glass total mass that converts with oxide compound, be not directly to be converted into a mole % to represent, when each composition that exists in the glass composition that will satisfy desired each characteristic among the present invention is represented with mole %, composition converts in oxide compound, and is roughly as follows.
La
2O
3Composition: 3～20mo1%,
B
2O
3Composition: 10～70mol%,
SiO
2Composition: 0～30mol%,
Nb
2O
5Composition: 0～10mol%,
TiO
2Composition: 0～20mol%,
ZnO composition: 5～30mol% and/or
ZrO
2Composition: 0～20mol% and/or
Al
2O
3Composition: 0～10mol% and/or
BaO composition: 0～20mol% and/or
WO
3Composition: 0～10mol% and/or
Na
2O composition: 0～10.0mol and/or
K
2O composition: 0～10.0mol and/or
Li
2O composition: 0～10.0mol and/or
Y
2O
3Composition: 0～10.0mol and/or
Gd
2O
3Composition: 0～10.0mol and/or
Yb
2O
3Composition: 0～10.0mol and/or
SrO composition: 0～10.0mol and/or
CaO composition: 0～10.0mol and/or
Sb
2O
3Composition: 0～1.0mol%
[manufacture method]
Opticglass of the present invention is made below can be for example like that.Promptly, above-mentioned raw materials can be the mode uniform mixing in the scope of the containing ratio of regulation according to each composition, and put into the mixture that is made in platinum crucible, quartz crucible or the alumina crucible and after carrying out thick fusion, put in the platinum crucible, the fusion difficulty of forming according to glass and fusion 3～4 hours in 1200～1400 ℃ temperature range in electric furnace, after stirring homogenizes, be reduced to and inject mould after the suitable temperature, thereby slowly cooling is made.
[rerum natura]
Opticglass of the present invention has high refractive index (nd) and low dispersivity.
Particularly, be limited to 1.75 under the specific refractory power of opticglass of the present invention (nd), be preferably 1.77, more preferably 1.78, on be limited to 1.95, be preferably 1.93, more preferably 1.92, more preferably 1.91, more preferably 1.90, more preferably 1.86 and then be preferably 1.84.
In addition, be limited to 30 under the Abbe number of opticglass of the present invention (ν d), be preferably 35, more preferably 37, on be limited to 40, be preferably 39 and then be preferably 38.
By so high specific refractory power, even if the very thin refraction of light amount that also can obtain appropriateness of optical glass device.In addition, by so low dispersivity, even if simple lens has also reduced the deviation (hue difference) of optical wavelength formation focus.
Therefore, opticglass of the present invention is useful in optical design, particularly can realize the miniaturization of optics system.
In addition, opticglass of the present invention is necessary to have the corresponding transmissivity that can be used as the opticglass use.Particularly, opticglass of the present invention when representing with the transmissivity of glass, shows the wavelength (λ of spectral transmission 80% with the sample of thickness 10mm
80) be below the 460nm, more preferably below the 450nm, most preferably be below the 445nm.
[preform and optical element]
As seen, opticglass of the present invention can be used for various optical elements and optical design, wherein, especially preferably uses hot repressing to make means such as type and precision press molding by opticglass of the present invention and makes optical elements such as lens, prism.Thus, when being used for opticinstrument such as photographic camera, projector, can realize high meticulous and high-precision imaging characteristic and projection property, and can realize the miniaturization of the optics system in these opticinstruments.
Embodiment
Embodiments of the invention below are shown.The present invention is not limited to following embodiment.
Embodiments of the invention (No.1～composition No.20) and the specific refractory power of these glass (nd), Abbe number (ν d), spectral transmission (λ
80) the results are shown in table 1.
Embodiments of the invention are (in the opticglass of No.1～No.20), the raw material of each composition is all chosen the high-purity raw that uses in the common opticglass such as corresponding separately oxide compound, oxyhydroxide, carbonate, nitrate, fluorochemical, oxyhydroxide, metaphosphoric acid compound, after carrying out weighing and uniform mixing according to the composition of each embodiment shown in the table 1, put in the platinum crucible, the fusion difficulty of forming according to glass and fusion after 3～4 hours under 1200～1400 ℃ the temperature in electric furnace, be injected into after stirring homogenizes in the mould, slowly glass is made in cooling.
Here, the embodiment (spectral transmission (λ of the opticglass of No.1～No.20)
80) can measure by specification JOGIS02-200 according to Japanese optics nitre industry.
Table 1
As shown in table 1 like that, embodiments of the invention (the transmissivity λ of the opticglass of No.1～No.20)
80Be below the 442nm.Thus, the opticglass of embodiments of the invention can be used as the opticglass use as can be known.
In addition, (specific refractory power (nd) of the opticglass of No.1～No.20) is more than 1.75 embodiments of the invention, is more than 1.78 in more detail as can be known.In addition, specific refractory power (nd) is below 1.95, is below 1.84 in more detail as can be known.
In addition, (Abbe number (ν d) of the opticglass of No.1～No.20) is more than 30 embodiments of the invention, is more than 36.1 in more detail as can be known.In addition, Abbe number (ν d) is below 40, is below 39.3 in more detail as can be known.
Therefore, specific refractory power of opticglass of the present invention (nd) and Abbe number (ν d) and have high transmissivity also in desired scope as can be known.
And then (opticglass of No.1～No.20) carries out hot repressing to be made to grind after the type and cuts and grind, and is processed into lens and prismatical shape to use embodiments of the invention.In addition, (opticglass of No.1～No.20) forms the precision press molding preform, and with precision press molding preform precision press molding to use embodiments of the invention.Under any circumstance, the glass after the thermoplastic does not all produce problems such as opacification and devitrification, has high transmissivity, and can stablize and be processed into various lens and prismatical shape.
Claims (7)
1. opticglass, it, contains in quality % with respect to forming the glass total mass that converts with oxide compound:
La
2O
3Composition 10.0～40.0%,
B
2O
3Composition 10.0～40.0%,
SiO
2Composition 0～15.0%,
Nb
2O
5Composition 0～20.0% and
TiO
2Composition 0～10.0%,
This opticglass has 1.75～1.95 specific refractory power (nd), and has 30～40 Abbe number (ν d).
2. opticglass according to claim 1 wherein, is formed the mass ratio (Nb that converts with oxide compound
2O
5+ TiO
2)/(SiO
2+ B
2O
3) be below 1.0.
3. opticglass according to claim 1 and 2, it, further contains in quality % with respect to forming the glass total mass that converts with oxide compound:
ZnO composition 5.0～20.0% and/or
ZrO
2Composition 0～15.0% and/or
Al
2O
3Composition 0～5.0% and/or
BaO composition 0～20.0% and/or
WO
3Composition 0～10.0% and/or
Na
2O composition 0～5.0% and/or
K
2O composition 0～5.0% and/or
Li
2O composition 0～5.0% and/or
Y
2O
3Composition 0～5.0% and/or
Gd
2O
3Composition 0～5.0% and/or
Yb
2O
3Composition 0～5.0% and/or
SrO composition 0～5.0% and/or
CaO composition 0～5.0% and/or
Sb
2O
3Composition 0～1.0%.
4. optical element, it is formed by each described opticglass in the claim 1～3.
5. precision press molding preform, it is formed by each described opticglass in the claim 1～3.
6. optical element, it forms the described precision press molding of claim 5 with the preform precision press molding.
7. the manufacture method of a glass forming body, it makes in the claim 1～3 each described opticglass softening and be pressed in mould.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-105163 | 2010-04-30 | ||
| JP2010105163 | 2010-04-30 | ||
| JP2011-036822 | 2011-02-23 | ||
| JP2011036822A JP2011246337A (en) | 2010-04-30 | 2011-02-23 | Optical glass, optical element and method for manufacturing molded glass article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102241479A true CN102241479A (en) | 2011-11-16 |
Family
ID=44959762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101134387A Pending CN102241479A (en) | 2010-04-30 | 2011-04-29 | Manufacture method of optical glass, optical element and glass shaped body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102241479A (en) |
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Application publication date: 20111116 |