CN102241478A - Optical glass and method of suppressing deterioration of spectral transmittance - Google Patents

Optical glass and method of suppressing deterioration of spectral transmittance Download PDF

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Publication number
CN102241478A
CN102241478A CN2011100886593A CN201110088659A CN102241478A CN 102241478 A CN102241478 A CN 102241478A CN 2011100886593 A CN2011100886593 A CN 2011100886593A CN 201110088659 A CN201110088659 A CN 201110088659A CN 102241478 A CN102241478 A CN 102241478A
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composition
glass
opticglass
oxide compound
converted
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荻野道子
土渊菜那
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Ohara Inc
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Ohara Inc
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    • 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
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • 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
    • C03C3/16—Silica-free oxide glass compositions containing phosphorus
    • C03C3/21—Silica-free oxide glass compositions containing phosphorus containing titanium, zirconium, vanadium, tungsten or molybdenum

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  • Chemical & Material Sciences (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

The invention provides a piece of optical glass capable of suppressing spectral transmittance deterioration along with time, an optical element having the optical glass and a manufacturing method of a glass formed body. The optical glass, based on the total mass of the glass calculated relative to the oxides, comprises 5.0 to 40.0 % by weight of P2O5, more than one component from a group comprising SiO2 and Nb2O5, and 10.0 to 60.0 % by weight of Nb2O5. The spectral transmittance deterioration during an over exposure moment, namely when the wavelength is lower than 450 nm, is below 5.0%. The optical glass is applied in the manufacturing method of the glass formed body which is formed by pressing softened optical glass in a mould.

Description

The method of opticglass and inhibition spectral transmittance deterioration
Technical field
The present invention relates to opticglass and suppress the method for the spectral transmittance deterioration of this opticglass.
Background technology
In recent years, the numberization of the equipment of use optical system and height become more meticulous and develop rapidly, headed by photographic equipments such as digital camera and pick up camera, also more and more higher to the requirement of high precision int, lightweight and the miniaturization of the optical elements such as spherical lens that are used for various optical devices.
In making the opticglass of optical element, especially very demand can reach optical element lightweight and miniaturization, have a high refractive index (n below 2.20 more than 1.70 d), have an Abbe number (ν below 25 more than 10 d) and glass with high refractive index and high dispersive.As this high refractive index high dispersive glass, for example as specific refractory power (n d) more than 1.91, have the opticglass of the Abbe number below 21, known is such glass of representative with patent documentation 1.And, as specific refractory power (n d) more than 1.65, have the opticglass of the Abbe number below 33.1 more than 17.2, known is such glass of representative with patent documentation 2.
Yet the glass of announcing in the patent documentation 1 and 2 exists by the ultraviolet ray that is contained in the sunlight etc. and causes the overexposure problem that spectral transmittance reduces.The glass that overexposure is big is painted because ultraviolet ray is shone for a long time, therefore, wishes the spectral transmittance that reaches when being difficult to keep making.
The prior art document
Patent documentation 1: TOHKEMY 2005-206433 communique
Patent documentation 2: Japanese kokai publication hei 06-345481 communique
Summary of the invention
In view of the above problems, the purpose of this invention is to provide a kind of spectral transmittance that suppresses passes and the opticglass of deterioration in time.
In order to address the above problem, the present inventor dedicates oneself to repetition test and research, found that, is containing Nb 2O 5In the opticglass of composition, by adjusting the Pt composition that contained in the opticglass and/or the content of Fe composition, the overexposure of opticglass can reduce, and has so far finished the present invention.Particularly, the invention provides following content:
(1) a kind of opticglass wherein, with respect to being converted into the glass total mass that oxide compound is formed, containing in mass percent and to add up to being selected from by P 5.0% or more and below 40.0% 2O 5Composition, SiO 2Composition and B 2O 3The composition of more than one in the group that composition is formed and 10.0% above and 60.0% following Nb 2O 5Composition, overexposure promptly the deterioration amount of the spectral transmittance under wavelength 450nm below 5.0%.
(2) according to (1) described opticglass, wherein, the content of Pt composition is below 15ppm.
(3) according to (1) or (2) described opticglass, wherein, with respect to being converted into the glass total mass that oxide compound is formed, the content of Fe composition is below 50ppm.
(4) according to any one the described opticglass of (1) to (3), wherein, in to the oxide compound being the outer ratio mass percent of the quality of standard, Sb 2O 3Composition is less than in mass 0.5%.
(5) according to any one the described opticglass of (1) to (4), wherein,, also contain more than 5.0% and 45.0% following TiO in mass percent with respect to being converted into the glass total mass that oxide compound is formed 2Composition.
(6) according to any one the described opticglass of (1) to (5), wherein,, also contain 0%～20.0% Bi in mass percent with respect to being converted into the glass total mass that oxide compound is formed 2O 3Composition and/or 0%～20.0% WO 3Each composition of composition.
(7) any one described opticglass of basis (1) to (6), wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and P 2O 5+ SiO 2+ B 2O 3+ Nb 2O 5+ TiO 2+ Bi 2O 3+ WO 3More than 50.0% and below 95.0%.
(8) according to any one the described opticglass of (1) to (7), wherein,, also contain 0%～20.0% Li in mass percent with respect to being converted into the glass total mass that oxide compound is formed 2O composition and/or 0%～35.0% Na 2O composition and/or 0%～20.0% K 2O composition and/or 0%～10.0% Cs 2Each composition of O composition.
(9) according to (8) described opticglass, wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and Li 2O+Na 2O+K 2O+Cs 2O is below 35.0%.
(10) according to (8) or (9) described opticglass, wherein, contain Rn 2The necessary composition of at least a conduct in the O composition, and Na 2O/Rn 2O is converted into mass ratio that oxide compound forms greater than 0 and less than 1, and wherein, Rn is more than one the element that is selected from the group of being made up of Li, Na, K and Cs.
(11) any one described opticglass of basis (1) to (10), wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contain each composition of the BaO composition of the CaO composition of 0%～5.0% MgO composition and/or 0%～10.0% and/or 0%～10.0% SrO composition and/or 0%～20.0% in mass percent.
(12) according to (11) described opticglass, with respect to being converted into the glass total mass that oxide compound is formed, quality and MgO+CaO+SrO+BaO are below 20.0%.
(13) according to any one the described opticglass of (1) to (12), wherein,, also contain 0%～10.0% Y in mass percent with respect to being converted into the glass total mass that oxide compound is formed 2O 3Composition and/or 0%～10.0% La 2O 3Composition and/or 0%～10.0% Gd 2O 3Each composition of composition.
(14) according to (13) described opticglass, wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and Y 2O 3+ La 2O 3+ Gd 2O 3Below 20.0%.
(15) according to any one the described opticglass of (1) to (14), wherein,, also contain 0%～40.0% SiO in mass percent with respect to being converted into the glass total mass that oxide compound is formed 2Composition and/or 0%～40.0% B 2O 3Composition and/or 0%～10.0% GeO 2Composition and/or 0%～10.0% ZrO 2Composition and/or 0%～10.0% ZnO composition and/or 0%～10.0% Al 2O 3Composition and/or 0%～10.0% Ta 2O 5Composition and/or 0%～10.0% CeO 2Each composition of composition.
(16) according to any one the described opticglass of (1) to (15), wherein, described opticglass has more than 1.70 and 2.20 following refractive index n d, has more than 10 and 40 following Abbe number ν d, shows the wavelength X of 70% spectral transmittance 70Below 500nm.
(17) a kind of comprising (1) is to the optics of (16) any one described opticglass.
(18) a kind of comprising (1) to (16) any one described opticglass the precise press molding preformed articles.
(19) a kind of optics that (18) described precision stamping is shaped and uses the preformed articles precise press molding and get.
(20) a kind of manufacture method of glass shaping body wherein, is used (1) to (16) any one described opticglass, and in mould the described opticglass of remollescent is carried out press forming.
According to the present invention, contain Nb by minimizing 2O 5The Sb that is contained in the opticglass of composition 2O 3The content of composition is more preferably and adjusts the Pt composition of sneaking in the opticglass and the content of Fe composition, opticglass that the overexposure that can obtain the caused opticglass of long-time uviolizing has reduced and the method that suppresses the spectral transmittance deterioration.
Embodiment
In opticglass of the present invention, be aggregated in being selected from below 40.0% more than 5.0% by P with respect to being converted into the glass total mass that oxide compound is formed, containing by percentage to the quality 2O 5Composition, SiO 2Composition and B 2O 3The composition of more than one in the group that becomes to be grouped into and 10.0% above Nb below 60.0% 2O 5Composition, overexposure (the deterioration amount of the spectral transmittance under wavelength 450nm) is below 5.0%.By reducing the Sb that is contained in the opticglass 2O 3The content of composition, the overexposure of glass can reduce.Thus, the spectral transmittance that can be inhibited is passed and the opticglass and the optical element of deterioration in time.
Below, just the embodiment of opticglass of the present invention elaborates.The present invention is not limited to following embodiment, as long as in purpose scope of the present invention, in addition suitable change ground is implemented.In addition, for the part that explanation duplicates, some places have suitably omitted explanation, but do not limit the aim of invention.
[opticglass]
Below, the compositing range that just constitutes each composition of opticglass of the present invention explains.In this manual, if do not explain especially, the content of each composition is meant the content of representing with mass percent with respect to the glass total mass that is converted into the oxide compound composition all.Here said " be converted into oxide compound form " be the oxide compound that supposition is used as the raw material of glass constituent of the present invention, composite salt, metal fluoride etc. all be decomposed during in fusion and become under the situation of oxide compound, the total mass conduct that will generate oxide compound in mass 100% represent each composition of containing in the glass and must composition.
＜content is answered downtrod composition 〉
At first, should explain by downtrod composition with regard to content in the opticglass of the present invention.
The Pt composition is when making opticglass, sneaks into composition the opticglass from parts such as for example platinum crucibles, is that uviolizing causes the reason that the overexposure of opticglass raises.Particularly, if the Pt component content that makes opticglass below 15ppm, overexposure just easily reduces, and also is difficult to the opticglass that changes even if can be easy to obtain the life-time service spectral transmittance.Therefore, the preferred 15ppm of the upper limit of the content of Pt composition in the opticglass, more preferably 10ppm, more preferably 7ppm, most preferably 5ppm.And on the other hand, if the content that makes the Pt composition greater than 0ppm, then compared with the situation that does not contain the Pt composition fully owing to be difficult to form brush line, just can be seldom to the glass that can not measure spectral transmittance, so just can obtain having the glass of the spectral transmittance of hope.Therefore, the content of the Pt composition of opticglass is preferably greater than 0.1ppm, more preferably greater than 0.5ppm, most preferably greater than 1.0ppm.
Here, even the Pt composition be do not contain the Pt composition also can be as raw material owing to the Pt composition is included in composition the opticglass from platinum parts strippings such as platinum crucibles, so, by fusing time that shortens the glass in platinum crucible or the temperature of fusion that reduces glass, can reduce the amount of the Pt composition of sneaking in the opticglass.
At this moment, except suppressing the content of Pt composition, also suppress following Sb simultaneously 2O 3The content of composition can make the overexposure of opticglass become like this and be more prone to reduce.This time is by making Sb 2O 3The content of composition is greater than 0%, compared with not containing Sb 2O 3During composition, overexposure is reduced.
The Fe composition is when making opticglass, as sneak into the composition in the opticglass as the opticglass impurities in raw materials, is that uviolizing causes the reason that the opticglass overexposure raises.Particularly, the content by making the Fe composition can make overexposure more easily be reduced to below 5.0% below 50ppm, even so just can obtain the also difficult opticglass that changes of life-time service spectral transmittance easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the preferred 50ppm of the upper limit of the content of Fe composition, more preferably 10ppm, most preferably 5ppm.About the Fe composition,, its amount of sneaking into opticglass is reduced by for example choosing the few opticglass raw material of Fe composition.In addition, as the impurity of frit, the Fe composition mostly is and contains more than the 0.1ppm, specifically more than the 0.5ppm, more particularly contains more than the 1ppm.
At this moment, except suppressing the content of Fe composition, also suppress above-mentioned Pt composition and following Sb simultaneously 2O 3At least a content in the composition can make the overexposure of opticglass become than being easier to reduction like this.
Sb 2O 3The composition that has degasifying effect when composition is molten glass is that uviolizing causes the reason that the overexposure of opticglass raises.Particularly, if make Sb 2O 3The content of composition is below 0.5%, and overexposure just is reduced to below 5.0% easily, even if therefore can obtain the opticglass that the life-time service spectral transmittance also is difficult to deterioration easily.And, remove bubble from the glass of fusing easily because become, so, can reduce that frit is melted to the injection required time of mould.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Sb 2O 3The upper limit of the content of composition is preferred 0.5%, and more preferably 0.4%, most preferably less than 0.3%.Sb 2O 3The content of composition is as long as in this scope, and technical just do not have what unfavorable especially, and by making Sb 2O 3The content of composition is greater than 0%, and do not contain Sb fully 2O 3Compare during composition, overexposure is reduced.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Sb 2O 3The content of composition is preferably greater than 0.001%, more preferably greater than 0.05%, most preferably greater than 0.01%.Sb 2O 3Composition can use for example Sb 2O 3Composition, Sb 2O 5Composition, Na 2H 2Sb 2O 75H 2O etc. are as raw material.
＜about neccessary composition, any composition 〉
P 2O 5Composition is the formation composition of glass, is the composition that reduces the glass melting temperature (Tm), also is any composition in the opticglass of the present invention.Particularly pass through P 2O 5The content of composition drops to below 40.0%, and the high refractive index that can obtain wishing is difficult for making the wear intensity of glass to be low to moderate more than the regulation simultaneously, thereby can improve the working (machining) efficiency of attrition process.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, P 2O 5The upper content limit of composition is preferred 40.0%, and more preferably 35.0%, most preferably 32.0%.P 2O 5Composition can use for example Al (PO 3) 3, Ca (PO 3) 2, Ba (PO 3) 2, BPO 4, H 3PO 4Deng as raw material.
SiO 2Composition be a kind of not only reduce painted, improve transmitance to short-wavelength visible light and also promote the composition that forms stable glass, improve the anti-devitrification of glass simultaneously, also be any composition in the opticglass of the present invention.Particularly by making SiO 2The content of composition can suppress by SiO below 40.0% 2The specific refractory power that composition causes reduces, and can more easily reach the high refractive index of hope.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, SiO 2The upper content limit of composition is preferred 40.0%, and more preferably 30.0%, more preferably 10.0%, most preferably 5.0%.SiO 2Composition can use for example SiO 2, K 2SiF 6, Na 2SiF 6Deng being contained in the glass as raw material.
B 2O 3Composition is a kind of composition that promotes to form stable glass, improves anti-devitrification, also is any composition in the opticglass of the present invention.Particularly by making B 2O 3The content of composition is below 40.0%, can suppress specific refractory power and reduce, and obtains the high refractive index of wishing easily, and can suppress average coefficient of linear expansion (α) simultaneously increases.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, B 2O 3The upper limit of the content of composition is preferred 40.0%, and more preferably 30.0%, more preferably 10.0%, most preferably 5.0%.B 2O 3Composition can use for example H 3BO 3, Na 2B 4O 7, Na 2B 4O 710H 2O, BPO 4Deng being contained in the glass as raw material.
In opticglass of the present invention, preferably make to be selected from by P 2O 5Composition, SiO 2Composition and B 2O 3The total content of the composition of more than one in the group that becomes to be grouped into is more than 5.0%.Thus, can improve the transmitance of glass, be difficult for making the wear intensity of glass high to regulation simultaneously, thereby can reduce the generation of the damage that causes by attrition process at visible region.And on the other hand,, can reach the high refractive index of hope by making this total content below 40.0%, make the wear intensity of glass be difficult to reduce more than the regulation simultaneously, thereby improve the working (machining) efficiency of attrition process.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, be selected from by P 2O 5Composition, SiO 2Composition and B 2O 3Become more than one the lower limit of total content of composition in the group be grouped into preferred 5.0%, more preferably 7.0%, most preferably 9.0%; The upper limit is preferred 40.0%, and more preferably 35.0%, most preferably 32.0%.
Nb 2O 5Composition is to improve glass refraction and dispersive composition.Particularly by making Nb 2O 5The content of composition is more than 30.0%, high refractive index that can obtain wishing and high dispersive.Yet, Nb 2O 5Composition itself is the composition that overexposure is raise, so, Nb 2O 5The content of composition is preferred below 60.0%.And, by making Nb 2O 5The content of composition can improve the stability of glass and improve anti-devitrification below 60.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Nb 2O 5The content lower limit of composition is preferred 30.0%, and more preferably 35.0%, most preferably 37.0%; The upper limit is preferred 60.0%, and more preferably 55.0%, more preferably 50.0%, most preferably less than 49.0%.Nb 2O 5Composition can use for example Nb 2O 5Deng being contained in the glass as raw material.
TiO 2Composition is the composition that improves the specific refractory power and the dispersion of glass and improve the chemical durability of glass, also is any composition in the opticglass of the present invention.Particularly by making TiO 2The content of composition can improve the stability of glass and improve anti-devitrification below 45.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, TiO 2The upper content limit of composition is preferred 45.0%, and more preferably 40.0%, most preferably 30.0%.Here, from improving simultaneously glass especially to aspect the transparency of visible light, with respect to being converted into the glass total mass that oxide compound is formed, TiO obtaining high refractive index and dispersive 2The upper content limit of composition is preferred 25.0%, and more preferably 22.0%, most preferably 20.0%.In addition, if do not contain TiO 2Composition, though can obtain the opticglass that overexposure reduces more, by making TiO 2Composition contains more than 5.0%, can improve the specific refractory power and the dispersion of glass more, the high refractive index and the high dispersive of the hope that therefore is easy to get.And, because can improve the acid resistance of glass, so the variable color can reduce glass processing the time.Therefore, this moment is with respect to being converted into the glass total mass that oxide compound is formed, TiO 2The content lower limit of composition is preferred 5.0%, and more preferably 8.0%, most preferably 10.0%.TiO 2Composition can use for example TiO 2Deng being contained in the glass as raw material.
Bi 2O 3Composition is the specific refractory power of rising glass and improves glass dispersive composition, also is any composition in the opticglass of the present invention.Particularly by making Bi 2O 3The content of composition can improve the stability of glass, the reduction of the anti-devitrification of inhibition below 20.0%, can suppress the reduction of glass transmitance.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Bi 2O 3The upper content limit of composition is preferred 20.0%, and more preferably 15.0%, most preferably 10.0%.
WO 3Composition is the rising glass refraction and improves the dispersive composition, also is any composition in the opticglass of the present invention.Particularly by making WO 3The content of composition can improve the anti-devitrification of glass below 20.0%, can suppress the transmitance reduction of glass to short-wavelength visible light simultaneously.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, WO 3The upper content limit of composition is preferred 20.0%, and more preferably 15.0%, most preferably 10.0%.WO 3Composition can use for example WO 3Deng being contained in the glass as raw material.
In opticglass of the present invention, be selected from by P 2O 5Composition, SiO 2Composition, B 2O 3Composition, Nb 2O 5Composition, TiO 2Composition, Bi 2O 3Composition and WO 3Become more than one the quality of content of composition and preferred more than 50.0% below 95.0% of the group be grouped into.Particularly, can improve the dispersion of glass by this quality and more than 50.0%, so, the opticglass of the high dispersive of wishing can be obtained easily.On the other hand, by this quality with below 95.0%, the liquidus temperature of glass meeting step-down, the anti-devitrification that can improve glass more.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, be selected from by P 2O 5Composition, SiO 2Composition, B 2O 3Composition, Nb 2O 5Composition, TiO 2Composition, Bi 2O 3Composition and WO 3Become the group be grouped into more than one composition content quality and lower limit preferred 50.0%, more preferably 60.0%, more preferably 65.0%, most preferably 72.0%; The upper limit is preferred 95.0%, and more preferably 92.0%, most preferably 91.0%.
Li 2The O composition is the composition that reduces the glass melting temperature (Tm), also is simultaneously the composition of the anti-devitrification when improving glass formation, also is any composition in the opticglass of the present invention.Particularly by making Li 2The content of O composition is below 20.0%, and the high refractive index of the hope that can be easy to get suppresses the generation that average coefficient of linear expansion (α) increases, improves stability, glass and reduces devitrification etc.And overexposure becomes and is difficult to raise, so, can obtain the opticglass that overexposure reduces easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Li 2The upper content limit of O composition is preferred 20.0%, and more preferably 15.0%, most preferably 10.0%.Li 2The O composition can use for example Li 2CO 3, LiNO 3, LiF etc. and being contained in the glass.
Na 2The O composition is the composition that reduces the glass melting temperature (Tm), also is simultaneously the composition of the anti-devitrification when improving glass formation, also is any composition in the opticglass of the present invention.Particularly by making Na 2The content of O composition is below 35.0%, can obtain the high refractive index of wishing easily, improves stability, glass and reduces the generation of devitrification etc.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Na 2The upper content limit of O composition is preferred 35.0%, and more preferably 30.0%, most preferably 25.0%.In addition, though do not contain Na 2The O composition also can obtain to possess the opticglass of desired characteristic, if but contain Na more than 0.1% 2O composition, the liquidus temperature of glass will step-downs, the anti-devitrification that can improve glass so more.Therefore, this moment is with respect to being converted into the total amount of glass that oxide compound is formed, Na 2The content lower limit of O composition is preferred 0.1%, and more preferably 0.5%, most preferably 1.0%.Na 2The O composition can use for example Na 2CO 3, NaNO 3, NaF, Na 2SiF 6Deng being contained in the glass as raw material.
K 2The O composition is the composition that reduces the glass melting temperature (Tm), also is simultaneously the composition of the anti-devitrification when improving glass formation, also is any composition in the opticglass of the present invention.Particularly by making K 2The content of O composition is below 20.0%, can obtain high refractive index, the reinforcing glass stability of wishing easily and reduce the generation of devitrification etc.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, K 2The upper content limit of O composition is preferred 20.0%, and more preferably 10.0%, most preferably 5.0%.K 2The O composition can use for example K 2CO 3, KNO 3, KF, KHF 2, K 2SiF 6Deng being contained in the glass as raw material.
Cs 2The O composition is the composition that reduces the glass melting temperature (Tm), also is simultaneously the composition of the anti-devitrification when improving glass formation, also is any composition in the opticglass of the present invention.Particularly by making Cs 2The content of O composition is below 10.0%, can obtain the high refractive index of wishing easily, and reinforcing glass stability also reduces the generation of devitrification etc.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Cs 2The upper content limit of O composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.Cs 2The O composition can use for example Cs 2CO 3, CsNO 3Deng being contained in the glass as raw material.
In opticglass of the present invention, Rn 2The quality of the content of O composition (Rn in the molecular formula is selected from more than one of the group be made up of Li, Na, K and Cs) and preferred below 35.0%.Thus, can suppress glass refraction and reduce, so, the high refractive index of wishing can be obtained easily.And stability, glass has improved, and can reduce the generation of anti-devitrification etc.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Rn 2The quality of the content of O composition and the upper limit preferred 35.0%, more preferably 30.0%, most preferably 25.0%.In addition, though do not contain any Rn 2The opticglass that the overexposure that also can obtain the O composition has reduced, still, if contain a certain Rn at least 2The O composition, then the liquidus temperature of glass can reduce, and can improve the anti-devitrification of glass more.Therefore, this moment is with respect to being converted into the glass total mass that oxide compound is formed, Rn 2The quality of the content of O composition and lower limit preferred 0.1%, more preferably 1.0%, most preferably 3.0%.
And, in opticglass of the present invention, Na 2The content of O composition is with respect to Rn 2The ratio of O component content is preferably greater than 0 less than 1.Particularly by making Na 2O/Rn 2O is greater than 0, then owing to can bring by containing Na 2The effect that O becomes branch to produce is so can make the liquidus temperature of glass reduce the anti-devitrification that can improve glass more.And on the other hand, by making Na 2O/Rn 2O can effectively contain Rn less than 1 2Two or more composition in the O composition, the glass transition point (Tg) of reduction opticglass so just can reduce the press forming temperature.That is to say, can reduce more and carry out the concavo-convex and fuzzy of press forming rear surface.And, by making Na 2O/Rn 2O can improve the anti-devitrification of opticglass more less than 1, therefore can more stably make the opticglass of the optical characteristics with hope.Therefore, be converted into the mass ratio Na that oxide compound is formed 2O/Rn 2The lower limit of O is preferably greater than 0, and more preferably 0.1, most preferably 0.2; And be converted into the mass ratio Na that oxide compound is formed 2O/Rn 2The upper limit of O is preferably less than 1, and more preferably 0.98, most preferably 0.96.
The MgO composition is the liquidus temperature that reduces glass, the composition that improves the anti-devitrification of glass, also is any composition in the opticglass of the present invention.Particularly the content by making the MgO composition can obtain the high refractive index and the high dispersive of wishing easily below 5.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the upper content limit of MgO composition is preferred 5.0%, and more preferably 4.0%, most preferably 3.0%.The MgO composition can use for example MgCO 3, MgF 2Deng being contained in the glass as raw material.
The CaO composition is the liquidus temperature that reduces glass, the composition that improves the anti-devitrification of glass, also is any composition in the opticglass of the present invention.Particularly the content by making the CaO composition is below 10.0%, can obtain the high refractive index and the high dispersive of wishing easily, suppresses the reduction of anti-devitrification and chemical durability.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the upper content limit of CaO composition is preferred 10.0%, and more preferably 8.0%, most preferably 6.0%.The CaO composition can use for example CaCO 3, CaF 2Deng being contained in the glass as raw material.
The SrO composition is the liquidus temperature that reduces glass, the composition that improves the anti-devitrification of glass, also is any composition in the glass.Particularly the content by making the SrO composition is below 10.0%, can obtain the high refractive index and the high dispersive of wishing easily, suppresses the reduction of anti-devitrification and chemical durability.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the upper content limit of SrO composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.The SrO composition can use for example Sr (NO 3) 2, SrF 2Deng being contained in the glass as raw material.
The BaO composition is to improve the specific refractory power of glass and improve the composition of anti-devitrification, also is any composition in the opticglass of the present invention.Particularly the content by making the BaO composition is below 20.0%, can obtain the high refractive index of wishing easily, suppresses anti-devitrification and chemical durability and reduces, and suppressing average coefficient of linear expansion (α) increases.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the upper content limit of BaO composition is preferred 20.0%, and more preferably 18.0%, most preferably 15.0%.At this, particularly in the glass this point that can obtain disperseing big (Abbe number is little), with respect to being converted into the glass total mass that oxide compound is formed, the upper content limit of BaO composition is preferred 13.0%, and more preferably 12.0%, preferably less than 10.0%.The BaO composition can use for example BaCO 3, Ba (NO 3) 2And BaF 2Deng being contained in the glass as raw material.
In opticglass of the present invention, the quality of the content of RO composition (in the formula, R is selected from more than one of the group be made up of Mg, Ca, Sr, Ba) and preferred below 20.0%.Thus, the specific refractory power and the dispersive that cause because of the RO composition reduce and can be suppressed, and can obtain the high refractive index and the high dispersive of wishing easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the quality of the content of RO composition and the upper limit are preferred 20.0%, and more preferably 17.0%, most preferably 15.0%.
Y 2O 3Composition is to improve glass refraction, improve the composition of the chemical durability of glass simultaneously, also is any composition in the opticglass of the present invention.Particularly by making Y 2O 3The content of composition is below 10.0%, can obtain the high dispersive of wishing, the anti-devitrification that also can improve glass easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Y 2O 3The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.Y 2O 3Composition can use for example Y 2O 3, YF 3Deng being contained in the glass as raw material.
La 2O 3Composition is to improve glass refraction, improve the composition of the chemical durability of glass simultaneously, also is any composition in the opticglass of the present invention.Particularly by making La 2O 3The content of composition is below 10.0%, can obtain the high dispersive of wishing, the anti-devitrification that also can improve glass easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, La 2O 3The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.La 2O 3Composition can use for example La 2O 3, La (NO 3) 3XH 2O (X represents arbitrary integer) etc. is contained in the glass as raw material.
Gd 2O 3Composition is to improve glass refraction, improve the composition of the chemical durability of glass simultaneously, also is any composition in the opticglass of the present invention.Particularly by making Gd 2O 3The content of composition is below 10.0%, can obtain the high dispersive of wishing, the anti-devitrification that also can improve glass easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Gd 2O 3The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.Gd 2O 3Composition can use for example Gd 2O 3, GdF 3Deng being contained in the glass as raw material.
In opticglass of the present invention, Ln 2O 3The quality of the content of composition (in the formula, Ln is selected from more than one of the group be made up of Y, La, Gd) and preferred below 20.0%.By making this quality and, can suppressing because of Ln below 20.0% 2O 3The rising of the Abbe number that composition causes is so can obtain the high dispersive of wishing easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Ln 2O 3The quality of the content of composition and the upper limit are preferred 20.0%, and more preferably 18.0%, most preferably 15.0%.
GeO 2Composition is to promote stable glass to form and improve the composition of the anti-devitrification of glass when improving glass refraction, also is any composition in the opticglass of the present invention.Particularly by making GeO 2The content of composition can reduce the material cost of glass below 10.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, GeO 2The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.GeO 2Composition can use for example GeO 2Deng being contained in the glass as raw material.
ZrO 2Composition is that transmitance painted in reduction, that improve short-wavelength visible light promotes stable glass to form and improve the composition of the anti-devitrification of glass simultaneously, also is any composition in the opticglass of the present invention.Particularly by making ZrO 2The content of composition can suppress because of ZrO below 10.0% 2The specific refractory power that composition causes reduces, and can obtain the high refractive index of wishing easily.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, ZrO 2The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.ZrO 2Composition can use for example ZrO 2, ZrF 4Deng being contained in the glass as raw material.
The ZnO composition is the liquidus temperature that reduces glass, the composition that improves the anti-devitrification of glass, also is any composition in the opticglass of the present invention.Particularly the content by making the ZnO composition can obtain the high refractive index and the high dispersive of wishing easily below 10.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, the upper content limit of ZnO composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.The ZnO composition can use for example ZnO, ZnF 2Deng being contained in the glass for raw material.
Al 2O 3Composition is the composition of the viscosity when improving the chemical durability of glass and glass melting, also is any composition in the opticglass of the present invention.Particularly by making Al 2O 3The content of composition can improve the melting of glass below 10.0%, and suppresses the increase of average coefficient of linear expansion (α), can weaken the devitrification trend of glass.Therefore with respect to being converted into the glass total mass that oxide compound is formed, Al 2O 3The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 5.0%.Al 2O 3Composition can use for example Al 2O 3, Al (OH) 3, AlF 3Deng being contained in the glass as raw material.
Ta 2O 5Composition is the composition that improves glass refraction, also is any composition in the opticglass of the present invention.Particularly by making Ta 2O 5The content of composition can make glass be difficult to devitrification below 10.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, Ta 2O 5The upper content limit of composition is preferred 10.0%, and more preferably 8.0%, most preferably 4.0%.Ta 2O 5Composition can use for example Ta 2O 5Deng being contained in the glass as raw material.
CeO 2Composition is a composition of adjusting the optical constant of glass, also is any composition in the opticglass of the present invention.Particularly by making CeO 2The content of composition can reduce glass coloring below 10.0%.Therefore, with respect to being converted into the glass total mass that oxide compound is formed, CeO 2The upper content limit of composition is preferred 10.0%, and more preferably 5.0%, more preferably 1.0%.CeO 2Composition can use for example CeO 2Deng being contained in the glass as raw material.
Make glass composition limpid and deaeration be not limited only to above-mentioned Sb 2O 3Composition and CeO 2Composition can use in the known finings of glass manufacturing area and deaerating agent or their combination.
＜the composition that should not contain 〉
Below, composition that should not contain in the opticglass of the present invention and the composition that does not preferably contain are described.
In opticglass of the present invention, can in the scope of not damaging glass performance, add other compositions as required.
Yet for each composition of Mo, Cr, Mn, Co, Ni, As, Ce, Cu, Ti, V and Ru, even only contain more than one composition in a spot of these compositions, overexposure all can become greatly, so preferably will reduce the content of these compositions.Therefore, from the viewpoint that overexposure is more reduced, preferably in glass refraction that can obtain to wish and dispersive scope, reduce TiO 2Composition.Therefore, from the viewpoint of further reduction overexposure, with respect to being converted into the glass total mass that oxide compound is formed, TiO 2The upper content limit of composition is preferred 15.0%, and more preferably 10.0%, most preferably 5.0%.And the content of Mo, Cr, Mn, Co, Ni, As, Ce, Cu, V and each composition of Ru except the impurity as frit contains, does not preferably contain these compositions.Therefore, the preferred 15ppm of the total amount upper limit of the Mo in the opticglass, Cr, Mn, Co, Ni, As, Ce, Cu, V and each composition of Ru, more preferably 10ppm, most preferably 7ppm.
Yet, except above-mentioned Ti, Zr, Nb, for each transiting metal components such as V, Cr, Mn, Co, Ni, Cu, Ag and Mo, even independent respectively or compoundly contain a spot of these transiting metal components, glass also can be painted, thereby the certain wave strong point that has in the visible region produces the character that absorbs, therefore, opticglass for the wavelength that uses the visible region preferably is substantially devoid of these compositions.In addition, " being substantially devoid of " among the present invention is meant except as the impurity of frit and do not contain the part that contains.
And, for arsenic compounds such as lead compounds such as PbO and As2O3 and Th, Cd, Tl, Os, each composition of Be, Se, in recent years be used as detrimental substance and the trend of controlling its use is arranged, not only in the manufacturing process of glass, to such an extent as in the processing after manufacturing procedure is made finished product, all must take environmental practice.Therefore, if the influence of attention on environment then except inevitably sneaking into, preferably is substantially devoid of these compositions.Thus, just do not contained the material of contaminate environment basically in the opticglass.Therefore, even if do not take special environmental protective measure, also can make, process and discard this opticglass.
For as opticglass of the present invention and the preferred glass that uses, because its composition is to use with respect to the mass percent of the glass total mass that is converted into the oxide compound composition to represent, so be not that direct form with molar percentage is represented, but each composition that exists in the glass composition for satisfied desired each characteristic in the present invention, its composition of representing based on molar percentage is roughly got following value when being converted into the oxide compound composition.
P 2O 5Composition 5.0mol%～40.0mol% reaches
Nb 2O 5Composition 5.0mol%～30.0%mol%
And
TiO 2Composition 0mol%～60.0mol% and/or
Bi 2O 3Composition 0mol%～8.0mol% and/or
WO 3Composition 0mol%～15.0mol% and/or
LiO 2Composition 0mol%～50.0mol% and/or
Na 2O composition 0mol%～50.0mol% and/or
K 2O composition 0mol%～30.0mol% and/or
Cs 2O composition 0mol%～5.0mol% and/or
MgO composition 0mol%～20.0mol% and/or
CaO composition 0mol%～30.0mol% and/or
SrO composition 0mol%～15.0mol% and/or
BaO composition 0mol%～20.0mol% and/or
Y 2O 3Composition 0mol%～5.0mol% and/or
La 2O 3Composition 0mol%～5.0mol% and/or
Gd 2O 3Composition 0mol%～4.0mol% and/or
SiO 2Composition 0mol%～50.0mol% and/or
B 2O 3Composition 0mol%～45.0mol% and/or
GeO 2Composition 0mol%～15.0mol% and/or
ZrO 2Composition 0mol%～10.0mol% and/or
ZnO composition 0mol%～20.0mol% and/or
Al 2O 3Composition 0mol%～15.0mol% and/or
Ta 2O 5Composition 0mol%～3.0mol% and/or
CeO 2Composition 0mol%～3.0mol%
＜rerum natura 〉
The overexposure of opticglass of the present invention is preferred below 5.0%.Like this, even the equipment of the opticglass of having packed into also is difficult to variation through the life-time service color balance.Particularly since the high more then overexposure of use temperature reduce many more, so when vehicle mounted etc. at high temperature used, opticglass of the present invention was effective especially.Therefore, the overexposure upper limit of opticglass of the present invention is preferred 5.0%, and more preferably 4.8%, most preferably 4.5%.In addition, " overexposure " in this specification sheets is expression glass deterioration amount at the spectral transmittance of 450nm when being subjected to uviolizing, specifically, try to achieve by measuring with the spectral transmittance before and after the rayed of high pressure mercury vapour lamp respectively according to the Japanese optics nitre standard JOGIS04-1994 of TIA " measuring method of the overexposure of opticglass ".
And opticglass of the present invention not only will have high refractive index (n d), also need to have high dispersive simultaneously.Specific refractory power (the n of opticglass of the present invention particularly d) lower limit is preferred 1.70, more preferably 1.75, most preferably 1.80.And, the Abbe number (ν of opticglass of the present invention d) upper limit is preferred 40, more preferably 30, most preferably 25.Like this, it is big that the degree of freedom of optical design becomes, and also can obtain high optical index even if further seek the slimming of element.Specific refractory power (n to opticglass of the present invention d) the upper limit be not particularly limited the specific refractory power (n of the glass of gained according to the present invention d) greatly about below 2.20, specifically be below 2.15, specifically many again below 2.10.And, to the Abbe number (ν of opticglass of the present invention d) lower limit be not particularly limited the Abbe number (ν of the glass of gained according to the present invention yet d) greatly about more than 10, specifically be more than 12, many specifically again more than 15.
And opticglass of the present invention is preferred painted few.Particularly, if opticglass of the present invention represent with the transmitance of glass, with the sample of thickness 10mm, present the wavelength (λ of 70% spectral transmittance 70) below the preferred 500nm, more preferably below the 480nm, most preferably below the 460nm.Like this, the absorption limit of glass is near the ultraviolet region, can improve the glass transparency of visible region, therefore, the material of this opticglass as optical elements such as lens can be used.
[manufacturing of glass and glass shaping body]
Opticglass of the present invention is for example made as follows.That is to say, raw material is mixed, make each composition in the scope of regulation content, after as required the mixture that makes being dropped into quartz crucible or alumina crucible and slightly melting, drop into by in more than one crucibles made among quartz, platinum, platinum alloy and the iridium, fusing in required time in the specified temperature scope, after stirring homogeneity and removing bubble etc., reduce the temperature of molten glass, be injected into mould, by slowly cooling, just made opticglass.Here, from can even heating the viewpoint of glass of fusing, have at least a part to use the crucible of platinum (platinum crucible) to come molten material in the preferred part of using with the glass contact of fusing, however the Pt composition but easily from the platinum crucible stripping to glass.Therefore, particularly when using platinum crucible, be reduced in the above-mentioned scope to the stripping of glass in order to make the Pt composition, preferred 1350 ℃ of the top temperature upper limit of the molten glass when glass stockpiles in platinum crucible, more preferably 1300 ℃, more preferably 1200 ℃, most preferably 1100 ℃.And molten glass stockpiles preferred 10 hours of time in platinum crucible, more preferably 8 hours, most preferably 5 hours.The temperature of molten glass is meant temperature average of molten glass of bottom of the crucible of the temperature of molten glass on top of the crucible that is used for molten glass and molten glass, and inside that this on average can be by for example being arranged on the crucible that is used for molten glass and the thermopair on the wall are tried to achieve.
With for example methods such as reheat press forming or precise press molding, can make glass shaping body by the opticglass of making.That is to say, can make the lens blank that is used for the mould press forming by opticglass, after this lens blank carried out the reheat press forming, carry out attrition process, make glass shaping body, or for example carry out attrition process earlier, the lens blank of making is carried out precise press molding and makes glass shaping body.In addition, the method for manufacturing compression forming body is not limited only to these methods.
The glass shaping body of making like this is all useful to various optical elements, wherein, is particularly preferred for optical element purposes such as lens and prism.The spectral transmittance that can suppress optical element is passed and deterioration in time thus, even life-time service, the color balance of optical element also is difficult for variation.
[embodiment]
Embodiments of the invention (No.1～No.12) and the concentration of the Pt composition of the composition of comparative example (No.1) and these glass and Fe composition, specific refractory power (n d), Abbe number (ν d), before and after the rayed wavelength 450nm spectral transmittance, overexposure and present the wavelength (λ of 70% spectral transmittance 70) as shown in Table 1 and Table 2.And the following examples are to be illustrated as purpose, to be not limited in these embodiment fully.
For embodiments of the invention (No.1～opticglass No.12) and the opticglass of comparative example (No.1), as the raw material of its each composition, all be to be normally used for the high-purity raw of opticglass selected from each suitable oxide compound, oxyhydroxide, carbonate, nitrate, fluorochemical, oxyhydroxide, metaphosphoric acid compound etc.In order to reach each embodiment shown in table 1 and the table 2 and the proportion of composing of comparative example, first weighing remix is even, and dropping into the part that contacts with molten glass then is the crucible (quartzy platinum crucible) that quartz and platinum form.Here, with regard to embodiment (No.1～No.5) and comparative example (No.1), it is the fusing difficulty of forming according to glass, melt in 1000 ℃～1300 ℃ temperature ranges with electric furnace, after stirring homogeneity and removing bubble etc., cool the temperature to 1000 ℃～1250 ℃, after stirring homogeneity, inject mould, slowly glass is made in cooling.On the other hand, with regard to embodiments of the invention (No.6～No.12), it is the fusing difficulty of forming according to glass, fused 2 hours to 4 hours in 1200 ℃～1350 ℃ temperature ranges with electric furnace, after stirring homogeneity and removing bubble etc., cool the temperature to 1100 ℃～1200 ℃, after stirring homogeneity, inject mould, slowly glass is made in cooling.At this, (among the No.1～No.12), to inject the needed time of mould be 2 hours to 30 hours from frit is fused quartzy platinum crucible at embodiments of the invention.And in the comparative example of the present invention (No.1), from (fusing the identical quartzy platinum crucible of No.1～No.12) and injecting the needed time of mould is 30 hours with frit input and embodiment.
At this, for embodiment (No.1～opticglass No.12) and the Pt composition of the glass of comparative example (No.1) and the content of Fe composition, be that will to have the glass of composition of embodiment and comparative example powdered, and carry out acid treatment, with ICP emission spectrometer (NSK electronics (seiko instruments) company limited produces Vista-PRO) this is measured by the solution that acid treatment gets.
And, for the embodiment (overexposure of No.1～opticglass No.12) and the glass of comparative example (No.1), be according to the Japanese optics nitre standard JOGIS04-1994 of TIA " measuring method of the overexposure of opticglass ", the variation (%) of the light transmission rate of the wavelength 450nm before and after the mensuration rayed.Here, the irradiation of light is by the opticglass sample being heated to 100 ℃ and carry out with the light of 4 hours wavelength 450nm of extra-high-pressure mercury vapour lamp irradiation.
And, the embodiment (specific refractory power (n of No.1～opticglass No.12) and the glass of comparative example (No.1) d) and Abbe number (ν d), measure according to the Japanese optics nitre standard JOGIS01-2003 of TIA.In addition, measure employed glass as this, what use is among Xu Lenglus to have carried out the glass handled for-25 ℃/h as annealing conditions with the speed that slowly cools.
And (No.1～No.12) and the transmitance of the glass of comparative example (No.1) are measured according to the Japanese optics nitre standard JOGIS02 of TIA for embodiment.In addition, in the present invention, know the degree that has that it's too late of glass coloring by the transmitance of measuring glass.Particularly, be according to the spectral transmittance of JISZ8722 standard to the opposite of thickness 10mm ± 0.1mm parallel grinding object mensuration 200nm～800nm, try to achieve λ 70(wavelength during transmitance 70%).
[table 1]
Figure BDA0000054508780000221
[table 2]
Figure BDA0000054508780000231
As shown in Table 1 and Table 2, the overexposure of the opticglass of the embodiment of the invention is all below 5.0%, and more detailed saying so below 1.99% is in the scope of hope.And on the other hand, the overexposure of the glass of comparative example is greater than 5.0%.Therefore, the glassy phase ratio of clear and definite and comparative example, the opticglass of the embodiment of the invention has reduced because of the overexposure of the opticglass that the long-time irradiation of ultraviolet ray causes.
And, the specific refractory power (n of the opticglass of the embodiment of the invention d) all more than 1.70, more detailed theory is more than 1.84, and this specific refractory power (n d) below 2.20, more detailed saying so below 1.95 is in the scope of hope.
And, the Abbe number (ν of the opticglass of the embodiment of the invention d) all more than 10, more detailed theory is more than 17.3, and this Abbe number (ν d) below 40, more detailed saying so below 25.3 is in the scope of hope.
And, the λ of the opticglass of the embodiment of the invention 70(wavelength during transmitance 70%) all below 500nm, more detailed saying so below 450nm is in the scope of hope.
After further the opticglass of the embodiment of the invention being carried out the reheat press forming, carry out grinding and grinding, be processed into lens and prismatical shape, just made glass shaping body.And the lens blank with the opticglass formation precise press molding of the embodiment of the invention is used carries out precise press molding processing to this lens blank, just makes glass shaping body.As a result, the Sb of the opticglass of the embodiment of the invention 2O 3The content of composition, Fe composition and Pt composition in specialized range below, the overexposure of the glass shaping body of gained is few, even can obtain also can having after long-term glass shaping body as the spectral transmittance of lens and prismatical regulation.And on the other hand, the glass of comparative example contains the above Sb of regulation 2O 3Composition, the glass shaping body of gained are easy to because of ultraviolet painted.Therefore, the clear and definite glass shaping body that is made by the opticglass of the embodiment of the invention is compared with the glass shaping body that glass by comparative example gets, and overexposure has reduced, and the deterioration that spectral transmittance is passed in time also is suppressed.
More than to be exemplified as purpose the present invention has been described, present embodiment illustrates purely, only those skilled in the art should understand that otherwise breaks away from thought of the present invention and scope, can carry out various changes.

Claims (20)

1. opticglass wherein, with respect to being converted into the glass total mass that oxide compound is formed, containing in mass percent and to add up to being selected from by P 5.0% or more and below 40.0% 2O 5Composition, SiO 2Composition and B 2O 3The composition of more than one in the group that composition is formed and 10.0% above and 60.0% following Nb 2O 5Composition, overexposure promptly the deterioration amount of the spectral transmittance under wavelength 450nm below 5.0%.
2. opticglass according to claim 1, wherein, the content of Pt composition is below 15ppm.
3. opticglass according to claim 1, wherein, with respect to being converted into the glass total mass that oxide compound is formed, the content of Fe composition is below 50ppm.
4. opticglass according to claim 1, wherein, in to the oxide compound being the outer ratio mass percent of the quality of standard, Sb 2O 3Composition is less than in mass 0.5%.
5. opticglass according to claim 1 wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contains more than 5.0% and 45.0% following TiO in mass percent 2Composition.
6. opticglass according to claim 1 wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contains 0%～20.0% Bi in mass percent 2O 3Composition and/or 0%～20.0% WO 3Each composition of composition.
7. opticglass according to claim 1, wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and P 2O 5+ SiO 2+ B 2O 3+ Nb 2O 5+ TiO 2+ Bi 2O 3+ WO 3More than 50.0% and below 95.0%.
8. opticglass according to claim 1 wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contains 0%～20.0% Li in mass percent 2O composition and/or 0%～35.0% Na 2O composition and/or 0%～20.0% K 2O composition and/or 0%～10.0% Cs 2Each composition of O composition.
9. opticglass according to claim 8, wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and Li 2O+Na 2O+K 2O+Cs 2O is below 35.0%.
10. opticglass according to claim 8 wherein, contains Rn 2The necessary composition of at least a conduct in the O composition, and Na 2O/Rn 2O is converted into mass ratio that oxide compound forms greater than 0 and less than 1, and wherein, Rn is more than one the element that is selected from the group of being made up of Li, Na, K and Cs.
11. opticglass according to claim 1, wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contain each composition of the BaO composition of the CaO composition of 0%～5.0% MgO composition and/or 0%～10.0% and/or 0%～10.0% SrO composition and/or 0%～20.0% in mass percent.
12. opticglass according to claim 11, wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and MgO+CaO+SrO+BaO are below 20.0%.
13. opticglass according to claim 1 wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contains 0%～10.0% Y in mass percent 2O 3Composition and/or 0%～10.0% La 2O 3Composition and/or 0%～10.0% Gd 2O 3Each composition of composition.
14. opticglass according to claim 13, wherein, with respect to being converted into the glass total mass that oxide compound is formed, quality and Y 2O 3+ La 2O 3+ Gd 2O 3Below 20.0%.
15. opticglass according to claim 1 wherein, with respect to being converted into the glass total mass that oxide compound is formed, also contains 0%～40.0% SiO in mass percent 2Composition and/or 0%～40.0% B 2O 3Composition and/or 0%～10.0% GeO 2Composition and/or 0%～10.0% ZrO 2Composition and/or 0%～10.0% ZnO composition and/or 0%～10.0% Al 2O 3Composition and/or 0%～10.0% Ta 2O 5Composition and/or 0%～10.0% CeO 2Each composition of composition.
16. opticglass according to claim 1, wherein, described opticglass has more than 1.70 and 2.20 following refractive index n d, has more than 10 and 40 following Abbe number ν d, shows the wavelength X of 70% spectral transmittance 70Below 500nm.
17. optics that comprises each described opticglass in the claim 1 to 16.
18. precise press molding preformed articles that comprises each described opticglass in the claim 1 to 16.
19. optics that the described precision stamping of claim 18 is shaped and uses the preformed articles precise press molding and get.
20. a glass shaping body manufacture method wherein, is used the described opticglass of claim 1, and in mould the described opticglass of remollescent is carried out press forming.
CN2011100886593A 2010-04-09 2011-04-08 Optical glass and method of suppressing deterioration of spectral transmittance Pending CN102241478A (en)

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