CN106915901A - A kind of optical glass, prefabricated component and optical element - Google Patents

A kind of optical glass, prefabricated component and optical element Download PDF

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Publication number
CN106915901A
CN106915901A CN201611197867.6A CN201611197867A CN106915901A CN 106915901 A CN106915901 A CN 106915901A CN 201611197867 A CN201611197867 A CN 201611197867A CN 106915901 A CN106915901 A CN 106915901A
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composition
glass
less
optical glass
compositions
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CN201611197867.6A
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Chinese (zh)
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荻野道子
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株式会社小原
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Priority to JP2015-254754 priority
Priority to JP2016-037048 priority
Priority to JP2016037048 priority
Priority to JP2016242559A priority patent/JP2017154963A/en
Priority to JP2016-242559 priority
Priority to JP2016242558A priority patent/JP2017119619A/en
Priority to JP2016-242558 priority
Application filed by 株式会社小原 filed Critical 株式会社小原
Publication of CN106915901A publication Critical patent/CN106915901A/en

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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/097Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/066Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/078Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made

Abstract

The present invention is obtained in that a kind of refractive index (nd) and Abbe number (νd) in required scope, and partial dispersion ratio (θ g, F) less optical glass.The optical glass, is calculated with the quality % of oxide conversion composition, contains SiO2Composition 20.0~60.0%, Nb2O5Composition 15.0~50.0%, and partial dispersion ratio (θ g, F) and Abbe number (νd) meet (0.00256 × νd+ 0.637)≤(θ g, F)≤(0.00256 × νd+ 0.684) relation.

Description

A kind of optical glass, prefabricated component and optical element

Technical field

The present invention relates to a kind of optical glass, prefabricated component and optical element.

Background technology

The optical system such as digital camera or video camera, more or less there is the color fringe (color referred to as aberration Fringing) phenomenon.This aberration is divided into monochromatic aberration and chromatic aberation, particularly chromatic aberation and depends greatly on optics The material property of the lens used in system.

Usual chromatic aberation is corrected by the concavees lens of the convex lens and dispersion high that combine low dispersion, but this combination is only The aberration of red area and green area can be corrected, and remains the aberration of blue region.This blue region that cannot be removed Aberration be referred to as second order spectrum.Correction second order spectrum needs to consider the g lines of blue region when optical design is carried out The trend of (435.835nm).Now, as the index of the optical characteristics got most of the attention in optical design, using partial dispersion Than (θ g, F).In combinations thereof in the optical system of the convex lens of low dispersion and the concavees lens of dispersion high, by low dispersion Using the optical material that partial dispersion ratio (θ g, F) is larger in the lens of side, and part is used in the lens of dispersion side high Dispersion ratio (θ g, F) less optical material, such that it is able to correct second order spectrum well.

Partial dispersion ratio (θ g, F) is represented by below equation (1).

θ g, F=(ng-nF)/(nF-nC)······(1)

In optical glass, in the partial dispersion ratio (θ g, F) and Abbe number of the partial dispersion for representing short wavelength region (νd) between, with substantially linear relation.Represent the straight line of this relation be the longitudinal axis with partial dispersion ratio (θ g, F), with Abbe Number (νd) fasten for the rectangular co-ordinate of transverse axis, mark and draw the partial dispersion of NSL7 and PBM2 when 2 points of Abbe number straight with connection Line represents, referred to as normal line (reference picture 1).As the normal glass of normal line benchmark, although according to optical glass manufacturer It is different and different, but each producer is defined that (NSL7 and PBM2 are small originals using almost identical gradient and intercept The optical glass of Co., Ltd.'s manufacture, the Abbe number (ν of PBM2d) it is 36.3, partial dispersion ratio (θ g, F) is 0.5828, NSL7's Abbe number (νd) it is 60.5, partial dispersion ratio (θ g, F) is 0.5436.).

In recent years, according to the need in optical design, the Abbe number (ν with less than more than 30 47 is often usedd) glass Glass is used as partial dispersion ratio (θ g, F) less optical material.Herein, as with less than more than 30 47 Abbe number (νd) Conventional glass, such as optical glass described in patent document 1~3 is widely known by the people.

On the other hand, in partial dispersion ratio (θ g, F) less optical material, due to special in order to obtain good optics Property and the composition (Nb that contains2O5Composition, B2O3Composition, Li2O compositions), there is the trend of chemical durability reduction.In these optics In glass, during process and preservation, sometimes due to the water vapour and carbon dioxide in polishing fluid, air Deng and produce photographic fog or inteferometer coating, these phenomenons to be commonly referred to as " white mould " or " blue mould " in glass surface, make as lens Used time causes problem with great defect.

Additionally, the on-vehicle lens for using in recent years and interchangeable lens etc., can often use under circumstances, therefore It is required that a kind of optical glass for not producing mildew.

【Patent document 1】Japanese Patent Laid-Open 2002-029777 publications

【Patent document 2】Japanese Patent Laid-Open 2008-239478 publications

【Patent document 3】Japanese Patent Laid-Open 2003-054983 publications

The technical problems to be solved by the invention

However, the glass disclosed in patent document 1, partial dispersion is insufficient as correcting described two grades than not small The lens of spectrum are used.In addition, the glass disclosed in patent document 1, because transmissivity is relatively low, therefore cannot also claim it there is foot Enough optical characteristics.

In addition, the glass disclosed in patent document 2, although with relatively small partial dispersion ratio, but Abbe number compared with Greatly, thus require a kind of smaller glass of Abbe number.Additionally, will also result in the less stable of glass, production efficiency is remarkably decreased Problem.

In addition, the glass disclosed in patent document 3, although glass transition temperature (Tg) is relatively low, but the stabilization of glass Property it is poor, therefore cannot claim its have enough chemical durabilities, particularly surface weatherability.

The present invention is completed in view of the above problems, its object is to obtain a kind of refractive index (nd) and Abbe number (νd) In required scope, and partial dispersion ratio (θ g, F) less optical glass.

In addition, the present invention also aims to obtain a kind of chemical durability, the particularly good optics of surface weatherability Glass.

The content of the invention

The present inventor etc., in order to solve above-mentioned problem, is repeated the result of deep experiment and research, and discovery is containing SiO2Composition and Nb2O5In the glass of composition, can obtain (high with the high index of refraction and low Abbe number in required scope Dispersion) and relatively low partial dispersion than glass, so as to complete the present invention.

In addition, the present inventor etc., has found containing SiO2Composition and Nb2O5In the glass of composition, by containing be used as must Need the K of composition2O compositions, can obtain chemical durability, the particularly good glass of surface weatherability.

(1) a kind of optical glass, it is characterised in that calculated with the quality % of oxide conversion composition,

Contain SiO2Composition 20.0~60.0%,

Nb2O5Composition 10.0~50.0%,

Also, partial dispersion ratio (θ g, F) and Abbe number (νd) meet (- 0.00256 × νd+ 0.637)≤(θ g, F)≤(- 0.00256×νd+ 0.684) relation.

(2) optical glass according to above-mentioned (1), it is characterised in that calculated with the quality % of oxide conversion composition, Contain ZrO2Composition 0~20.0%.

(3) optical glass according to above-mentioned (1) or (2), it is characterised in that with the quality % of oxide conversion composition Calculate, contain K2O compositions 0~15.0%.

(4) optical glass described in any one according to above-mentioned (1) to (3), it is characterised in that surface weatherability grade It is 1 grade or 2 grades.

(5) optical glass described in any one according to above-mentioned (1) to (4), it is characterised in that

Calculated with the quality % of oxide conversion composition,

ZnO component is 0~25.0%,

Li2O compositions are 0~20.0%,

Na2O compositions are 0~20.0%,

B2O3Composition is 0~20.0%,

TiO2Composition is 0~15.0%,

MgO compositions are 0~10.0%,

CaO compositions are 0~10.0%,

SrO compositions are 0~10.0%,

BaO compositions are 0~10.0%,

La2O3Composition is 0~10.0%,

Gd2O3Composition is 0~10.0%,

Y2O3Composition is 0~10.0%,

Yb2O3Composition is 0~10.0%,

Ta2O5Composition is 0~10.0%,

WO3Composition is 0~10.0%,

P2O5Composition is 0~10.0%,

GeO2Composition is 0~10.0%,

Al2O3Composition is 0~10.0%,

Ga2O3Composition is 0~10.0%,

Bi2O3Composition is 0~10.0%,

TeO2Composition is 0~5.0%,

SnO2Composition is 0~5.0%,

Sb2O3Composition is 0~1.0%.

(6) optical glass described in any one according to above-mentioned (1) to (5), it is characterised in that mass ratio (Li2O+ K2O)/(ZrO2+Li2O) be more than 0~less than 2.5.

(7) optical glass described in any one according to above-mentioned (1) to (6), it is characterised in that SiO2Composition and Nb2O5 The content sum of composition is more than 50.0%.

(8) optical glass described in any one according to above-mentioned (1) to (7), it is characterised in that

Calculated with the standard quality % of oxide,

Ln2O3The quality sum of composition is 0~15.0%, and in formula, Ln is to be selected from the group being made up of La, Gd, Y, Yb More than a kind,

The quality sum of RO compositions is 0~30.0%, and in formula, R is 1 selected from the group being made up of Mg, Ca, Sr, Ba More than kind,

Rn2The quality sum of O compositions is 0~30.0%, and in formula, Rn is a kind selected from the group being made up of Li, Na, K More than.

(9) optical glass described in any one according to above-mentioned (1) to (8), it is characterised in that with more than 1.60 Less than 1.78 refractive index (nd) and less than more than 28 47 Abbe number (νd)。

(10) optical glass described in any one according to above-mentioned (1) to (9), it is characterised in that spectral-transmission favtor shows Show 80% wavelength (λ80) it is below 420nm, spectral-transmission favtor shows 5% wavelength (λ5) it is below 365nm.

(11) prefabricated component of a kind of attrition process use and/or precise punch forming, it is by above-mentioned (1) to (10) Optical glass described in any one is constituted.

(12) a kind of optical element, its optical glass described in any one of above-mentioned (1) to (10) is constituted.

Invention effect

In accordance with the invention it is possible to obtain a kind of refractive index (nd) and Abbe number (νd) in required scope, and Partial dispersion is than relatively low optical glass.

In addition, in accordance with the invention it is possible to obtaining a kind of refractive index (n with cheaper priced) and Abbe number (νd) In required scope, and reduce milky white and devitrification the optical glass produced in the compressing operation of reheating.

In addition, in accordance with the invention it is possible to obtaining a kind of refractive index (nd) and Abbe number (νd) in required scope It is interior, and with the high index of refraction in required scope and low Abbe number (dispersion higher) and lower part dispersion than glass Glass, and in the case where relatively low partial dispersion ratio (θ g, F) is kept, it is obtained in that a kind of good optics of chemical durability Glass.

Brief description of the drawings

Fig. 1 be represent with partial dispersion ratio (θ g, F) be the longitudinal axis, with Abbe number (νd) in the rectangular coordinate system of transverse axis The schematic diagram of represented normal line.

Fig. 2 is part dispersion ratio (θ g, F) and Abbe number (ν on embodiments of the inventiond) relation schematic diagram.

Specific embodiment

Optical glass of the invention, is calculated with the quality % of oxide conversion composition, contains SiO2Composition 20.0~ 60.0%, Nb2O5Composition 10.0~50.0%, and partial dispersion ratio (θ g, F) and Abbe number (νd) between meet (- 0.00256 ×νd+ 0.637)≤(θ g, F)≤(- 0.00256 × νd+ 0.684) relation.

Containing SiO2Composition and Nb2O5In the optical glass of composition, it is obtained in that with the height in required scope Refractive index and low Abbe number (dispersion high) and lower part dispersion than glass.

It is a kind of with required refractive index (n higher therefore, it is possible to obtaind) and relatively low Abbe number (νd) and Partial dispersion ratio (θ g, F) is relatively low and contributes to the optical glass of the chromatic aberation of reduction optical system.

Particularly, the first optical glass, is calculated with the quality % of oxide conversion composition, contains SiO2Composition 20.0~ 60.0%, Nb2O5Composition 20.0~45.0%, ZrO2Composition 1.0~20.0%, and with less than more than 1.60 1.75 refraction Rate (nd) and less than more than 30 47 Abbe number (νd), partial dispersion ratio (θ g, F) and Abbe number (νd) meet (- 0.00256 × νd+ 0.637)≤(θ g, F)≤(- 0.00256 × νd+ 0.684) relation.

In the first optical glass, containing SiO2Composition, Nb2O5Composition and ZrO2In the glass of composition, it is obtained in that With the high index of refraction in required scope and low Abbe number (dispersion high) and lower part dispersion than glass.

It is a kind of with required refractive index (n higher therefore, it is possible to obtaind) and relatively low Abbe number (νd), part Dispersion ratio (θ g, F) is relatively low and contributes to the optical glass of the chromatic aberation of reduction optical system.

In addition, the second optical glass, is calculated with the quality % of oxide conversion composition, contain SiO2Composition 20.0~ 60.0%, Nb2O5Composition 10.0~50.0%, K2O compositions are more than 0.1~15.0%, and partial dispersion ratio (θ g, F) and Abbe Number (νd) meet (- 0.00256 × νd+ 0.637)≤(θ g, F)≤(- 0.00256 × νd+ 0.684) relation, surface weatherability Grade is 1 grade or 2 grades.

In the second optical glass, containing SiO2Composition, Nb2O5Composition and K2In the glass of O compositions, it is obtained in that A kind of high index of refraction with required scope and low Abbe number (dispersion high) and lower part dispersion than glass, especially It is by containing K2O compositions, it is easy to the required optical constant of adjustment, are keeping the state of lower part dispersion ratio (θ g, F) Under, the generation of mildew can be reduced.

It is a kind of with required refractive index (n higher therefore, it is possible to obtaind) and relatively low Abbe number (νd), and Partial dispersion ratio (θ g, F) is relatively low and helps to reduce the chromatic aberation of optical system, particularly chemical durability, surface weatherability Good optical glass.

Hereinafter, the implementation method to optical glass of the invention is specifically described, but the present invention does not receive following implementation Any restriction of mode, in the range of the purpose of the present invention, can suitably be changed and be implemented.Additionally, for repeating to say Bright part, the description thereof is omitted as appropriate sometimes, but does not limit the objective of invention.

[glass ingredient]

Hereinafter, the compositing range for constituting each composition of optical glass of the invention is illustrated.In this manual, such as Fruit is not particularly illustrated, and the content of each composition is represented with the quality % of the glass gross mass relative to oxide conversion composition. Herein, " oxide conversion composition " refer to, assuming that the oxidation used as the raw material of glass constituent of the invention In the case that thing, complex salt, metal fluoride etc. are all decomposed and change into oxide in melting, by the generation oxide Gross mass represents the composition of contained each composition in glass as 100 mass %.

<On required composition, any condition>

SiO2Composition, because the glass that can promote stabilization is formed, and can reduce liquidus temperature, therefore be reduced to optics The required composition of the unaccommodated devitrification of glass (generation crystalline solid).

Particularly, by making SiO2The content of composition is more than 20.0%, it is not necessary to partial dispersion ratio, energy is significantly increased Enough obtain the good glass of devitrification resistance.In addition, devitrification when can reduce to form glass accordingly and when reheating and Color.Therefore, SiO2The content of composition, it is usually desirable to 20.0% be lower limit, is more preferably lower limit with 23.0%, It is lower limit more preferably with 25.0%, is more preferably lower limit with 27.0%, is more preferably with 30.0% Lower limit, is more preferably lower limit with 32.0%.

On the other hand, by making SiO2The content of composition below 60.0%, can be declined by being difficult to refractive index and Be easier to obtain required by high index of refraction, and can suppress partial dispersion than rising.In addition, glass can be suppressed accordingly The decline of the meltbility of raw material.Therefore, SiO2The content of composition, it is usually desirable to 60.0% be the upper limit, more preferably It with 55.0% is the upper limit to be, is the upper limit more preferably with 50.0%, is more preferably the upper limit with 48.0%, is more managed Think be with 47.0% be the upper limit, be more preferably the upper limit with 45.0%, be the upper limit more preferably with 44.0%, more It is ideally the upper limit with 43.0%.

SiO2Composition, SiO can be used as raw material2、K2SiF6、Na2SiF6Deng.

Nb2O5Composition is can to improve refractive index, reduces Abbe number and partial dispersion ratio, and can improve devitrification The required composition of property.

Particularly, by making Nb2O5Refractive index is brought up to the optical constant of target more than 10.0% for the content of composition, And be adjusted in the composition of the scope of the present invention, such that it is able to make anomalous dispersion reduction.Therefore, Nb2O5Composition contains Amount, it is usually desirable to 10.0% be lower limit, is more preferably lower limit with 15.0%, more preferably with 20.0% It is lower limit, is more preferably lower limit with 22.0%, is lower limit more preferably with 23.0%.

On the other hand, by making Nb2O5The content of composition can reduce the material cost of glass below 50.0%.Separately Outward, the rising of melt temperature when can suppress to manufacture glass, and can reduce Nb2O5The excessive mistake for causing of the content of composition Thoroughly.Further, it is also possible to improve the reduction of the chemical durability of glass.Therefore, Nb2O5The content of composition, it is usually desirable to 50.0% is the upper limit, is more preferably the upper limit with 45.0%, is the upper limit more preferably with 43.0%, more preferably It with 41.5% is the upper limit to be, is more preferably the upper limit with 40.0%, is the upper limit more preferably with 35.0%, is more managed Think be with 30.0% be the upper limit.

Nb2O5Composition, Nb can be used as raw material2O5Deng.

ZrO2Composition is, when content is more than 0%, can improve the refractive index and Abbe number of glass, and reduce part Dispersion ratio, and the composition of devitrification resistance can be improved, particularly it is required composition in the first optical glass.In addition, passing through Contain ZrO2Composition, it is possible to reduce formed glass when and reheat when devitrification and coloring.Therefore, ZrO2The content of composition, Desirably more than 1.0%, 1.0% is more preferably greater than, more preferably more than 3.0%, more preferably Being can also be more than 5.0%.

On the other hand, by making ZrO2The content of composition is below 20.0%, it is possible to reduce devitrification, and can be easier to Ground obtains glass evenly.Therefore, ZrO2The content of composition, it is usually desirable to 20.0% be the upper limit, more preferably It with 18.0% is the upper limit to be, is the upper limit more preferably with 15.0%, is more preferably the upper limit with 13.0%, is more managed Think be with 10.0% be the upper limit.

ZrO2Composition, ZrO can be used as raw material2、ZrF4Deng.

K2O compositions are, when content is more than 0%, can improve the meltbility of frit, and can reduce liquid phase temperature Any condition of degree.Particularly in the 2nd optical glass, K2O compositions can be the required composition for improving chemical durability.

Particularly, by making K2The content of O compositions is more than 0%, can effectively improve the mildew in glass.Therefore, K2O The content of composition, it is usually desirable to more than 0%, is more preferably greater than 0.1%, more preferably more than 0.3%, more Ideally it is more than 0.5%, can also be more preferably more than 1.0%.

On the other hand, by making K2The content of O compositions below 15.0%, can suppress partial dispersion than rising, subtract Few devitrification, and also chemical durability can be made to be difficult to reduce.Therefore, K2The content of O compositions, it is usually desirable to 15.0% with Under, more preferably less than 10.0%, more preferably less than 10.0%, 8.0% is more preferably less than, more manage That thinks is less than 5.0%.

K2O compositions, K can be used as raw material2CO3、KNO3、KF、KHF2、K2SiF6Deng.

ZnO component is, cheap and can improve devitrification resistance when content is more than 0%, and can reduce vitrifying and turn Any condition of temperature.Therefore, the content of ZnO component, it is usually desirable to more than 0%, be more preferably greater than 0.5%, can also more preferably be more than 1.0%.

On the other hand, by making the content of ZnO component below 25.0%, it is possible to reduce when forming glass and reheating When devitrification and coloring, and chemical durability can be improved.Therefore, the content of ZnO component, it is usually desirable to 25.0% Hereinafter, more preferably less than 20.0%, more preferably less than 18.0%, 14.0% is more preferably less than, more Plus ideally less than 13.0%, more preferably it is less than 10.0%.

Li2O compositions are, when content is more than 0%, can reduce partial dispersion ratio, improve transmissivity, reduce liquid phase temperature Degree, and any condition of the meltbility of frit can be improved.Therefore, Li2The content of O compositions, it is usually desirable to big In 0%, 1.0% is more preferably greater than, more preferably more than 3.0%, can also be more preferably more than 5.0%.

On the other hand, by making Li2The content of O compositions can suppress the reduction of refractive index below 20.0%, make chemistry Durability is difficult to decline, and can reduce the devitrification caused by excessive content.

Therefore, Li2The content of O compositions, it is usually desirable to less than 20.0%, more preferably less than 15.0%, more Plus preferably less than 13.0%, 10.0% is more preferably less than, more preferably less than 8.0%.

Li2O compositions, Li can be used as raw material2CO3、LiNO3, LiF etc..

Na2O compositions are, when content is more than 0%, can reduce partial dispersion ratio, reduce liquidus temperature, and can carry Any condition of the meltbility of frit high.Therefore, Na2The content of O compositions, it is usually desirable to more than 0%, it is even more ideal Be greater than 1.0%, more preferably more than 3.0%, more preferably can also be more than 5.0%.

On the other hand, by making Na2The content of O compositions can suppress the reduction of refractive index below 20.0%, make chemistry Durability is difficult to decline, and can reduce the devitrification caused by excessive content.

Therefore, Na2The content of O compositions, it is usually desirable to less than 20.0%, more preferably less than 15.0%, more Plus preferably less than 13.0%, 10.0% is more preferably less than, more preferably less than 8.0%.

Na2O compositions, Na can be used as raw material2CO3、NaNO3、NaF、Na2SiF6Deng.

B2O3Composition is, when content is more than 0%, because the glass that can promote stabilization is formed and reduces liquidus temperature, because This can improve devitrification resistance, and can improve any condition of the meltbility of frit.Therefore, B2O3The content of composition, Desirably it is more than 0%, is more preferably greater than 0.1%, more preferably more than 1.0%, more preferably More than 3.0%, can also more preferably be more than 5.0%.Particularly, from low temperature moulding melten glass, devitrification resistance is improved And from the point of view of reduction striped, B2O3Component content is preferred more than 3.0%, it is usually desirable to more than 5.0%, more Can also be preferably more than 7.0%.

On the other hand, by making B2O3The content of composition can suppress the reduction of refractive index below 20.0%, and can With suppress partial dispersion than rising.Furthermore, it is possible to improve the reduction of the chemical durability of glass.Therefore, B2O3Composition contains Amount, it is usually desirable to 20.0% be the upper limit, is more preferably the upper limit with 18.0%, more preferably with 15.0% It is the upper limit, is more preferably the upper limit with 12.0%.

B2O3Composition, H can be used as raw material3BO3、Na2B4O7、Na2B4O7·10H2O、BPO4Deng.

TiO2Composition is, when content is more than 0%, can improve refractive index, reduces Abbe number, and can improve resistance to mistake Any condition of permeability.

On the other hand, by making TiO2The content of composition is below 15.0%, it is possible to reduce the coloring of glass, improves internal Transmissivity.In addition, partial dispersion ratio is difficult to rise accordingly, thus can relatively easily obtain away from normal line it is nearer required by Lower part dispersion ratio.Therefore, TiO2The content of composition, it is usually desirable to less than 15.0%, more preferably 10.0% with Under, more preferably less than 5.0%, 5.0% is more preferably less than, it is even more ideal more preferably less than 3.0% Be below 2.0%, more preferably less than 1.0%.Particularly, the angle from the anomalous dispersion for reducing glass is examined Consider, do not contain actually and be preferred.

TiO2Composition, TiO can be used as raw material2Deng.

MgO compositions are, when content is more than 0%, can to reduce any condition of the melt temperature of glass.

On the other hand, by making the content of MgO compositions below 10.0%, the reduction of refractive index can be suppressed, and can To reduce devitrification.Therefore, the content of MgO compositions, it is usually desirable to less than 10.0%, is more preferably less than 5.0%, more Plus ideally less than 3.0%, more preferably it is less than 1.0%.

MgO compositions, MgO, MgCO can be used as raw material3、MgF2Deng.

CaO compositions, when content is more than 0%, can reduce the material cost of glass, it is possible to reduce Abbe number and mistake Thoroughly, and can improve frit meltbility any condition.Therefore, the content of CaO compositions, it is usually desirable to be more than 0%, 1.0% is more preferably greater than, can also more preferably be more than 2.0%.

On the other hand, by making the content of CaO compositions below 10.0%, reduction, the Abbe number of refractive index can be suppressed Rising and portion's dispersion ratio rising, and devitrification can be reduced.Therefore, the content of CaO compositions, it is usually desirable to Less than 10.0%, 5.0% is more preferably less than, more preferably less than 3.0%, more preferably it is less than 1.0%.

CaO compositions, CaCO can be used as raw material3、CaF2Deng.

SrO compositions are, when content is more than 0%, can improve refractive index, and can improve devitrification resistance it is any into Point.

Particularly, by making the content of SrO compositions below 10.0%, the reduction of chemical durability can be suppressed.Therefore, The content of SrO compositions, it is usually desirable to less than 10.0%, is more preferably less than 5.0%, more preferably 3.0% Hereinafter, 3.0% is more preferably less than, more preferably less than 1.0%.

SrO compositions, Sr (NO can be used as raw material3)2、SrF2Deng.

BaO compositions are, when content is more than 0%, can improve refractive index, reduce partial dispersion ratio, it is possible to improve resistance to The meltbility of increased devitrification resistance and frit, also, can be reduced compared with other alkaline-earth metal constituents the material of glass into This any condition.

Particularly, by making the content of BaO compositions below 10.0%, the reduction of refractive index, Abbe number can be suppressed Rising and the rising of portion's dispersion ratio, and devitrification can be reduced.Therefore, the content of BaO compositions, it is usually desirable to 10.0% Hereinafter, 5.0% is more preferably less than, more preferably less than 3.0%, 1.0% is more preferably less than.

BaO compositions, BaCO can be used as raw material3、Ba(NO3)2Deng.

La2O3Composition, Gd2O3Composition, Y2O3Composition and Yb2O3Composition is to be more than 0% at least content of any one When, can improve refractive index, and can reduce partial dispersion than any condition.

Particularly, by making La2O3Composition, Gd2O3Composition, Y2O3Composition and Yb2O3Each content of composition is 10.0% Hereinafter, the rising of Abbe number can be suppressed, devitrification is reduced, and material cost can be reduced.Therefore, La2O3Composition, Gd2O3Into Point, Y2O3Composition and Yb2O3Each content of composition, it is usually desirable to 10.0% be the upper limit, more preferably with 5.0% is the upper limit, is the upper limit more preferably with 3.0%, is more preferably less than 1.0%.

La2O3Composition, Gd2O3Composition, Y2O3Composition and Yb2O3Composition, La can be used as raw material2O3、La (NO3)3·XH2O (X is arbitrary integer), Y2O3、YF3、Gd2O3、GdF3、Yb2O3Deng.

Ta2O5Composition is, when content is more than 0%, can improve refractive index, reduces Abbe number and partial dispersion ratio, and And any condition of devitrification resistance can be improved.

On the other hand, by making Ta2O5The content of composition reduces rare mineral resource Ta below 10.0%2O5Composition Usage amount, and glass easily melts at lower temperatures, therefore the production cost of glass can be reduced.In addition, accordingly can be with Reduce by Ta2O5The devitrification of the excessive glass for causing of the content of composition.Therefore, Ta2O5The content of composition, it is usually desirable to Less than 10.0%, 5.0% is more preferably less than, more preferably less than 3.0%, more preferably it is less than 1.0%. Particularly from from the point of view of the material cost for reducing glass, it is also possible to do not contain Ta2O5Composition.

Ta2O5Composition, Ta can be used as raw material2O5Deng.

WO3Composition is, when content is more than 0%, can improve refractive index and reduce Abbe number, and can improve resistance to mistake Permeability, and any condition of the meltbility of frit can be improved.

On the other hand, by making WO3The content of composition can be difficult to the partial dispersion ratio of glass below 10.0% Rise, and the coloring of glass can be reduced and internal transmission rate is improved.Therefore, WO3The content of composition, it is usually desirable to Less than 10.0%, 5.0% is more preferably less than, more preferably less than 3.0%, more preferably it is less than 1.0%.

WO3Composition, WO can be used as raw material3Deng.

P2O5Composition is, when content is more than 0%, can to improve any condition of the stability of glass.

On the other hand, by making P2O5The content of composition is below 10.0%, it is possible to reduce due to P2O5Component content is excessive The devitrification for causing.Therefore, P2O5The content of composition, it is usually desirable to less than 10.0%, is more preferably less than 5.0%, more Plus ideally less than 3.0%, more preferably it is less than 1.0%.

P2O5Composition, Al (PO can be used as raw material3)3、Ca(PO3)2、Ba(PO3)2、BPO4、H3PO4Deng.

GeO2Composition is, when content is more than 0%, can improve refractive index, and can reduce any condition of devitrification.

On the other hand, by making GeO2The content of composition is below 10.0%, it is possible to reduce GeO costly2Composition makes Consumption, therefore the material cost of glass can be reduced.Therefore, GeO2The content of composition, it is usually desirable to less than 10.0%, more 5.0% is ideally less than, more preferably less than 3.0%, 1.0% is more preferably less than.

GeO2Composition, GeO can be used as raw material2Deng.

Al2O3Composition and Ga2O3Composition is, when at least the content of any one is more than 0%, can improve chemistry resistance to Long property, and any condition of devitrification resistance can be improved.

On the other hand, by making Al2O3Composition and Ga2O3Each content of composition is below 10.0%, it is possible to reduce by Al2O3Composition and Ga2O3The excessive devitrification for causing of the content of composition.Therefore, Al2O3Composition and Ga2O3Each of composition contains Amount, it is usually desirable to less than 10.0%, is more preferably less than 5.0%, more preferably less than 3.0%, more manages That thinks is less than 1.0%.

Al2O3Composition and Ga2O3Composition, Al can be used as raw material2O3、Al(OH)3、AlF3、Ga2O3、Ga(OH)3 Deng.

Bi2O3Composition is, when content is more than 0%, can improve refractive index and reduce Abbe number, and can reduce glass Any condition of glass transition temperature.

On the other hand, by making Bi2O3The content of composition can make partial dispersion ratio be difficult to rise below 10.0%, and And the coloring of glass can be reduced and internal transmission rate is improved.Therefore, Bi2O3The content of composition, it is usually desirable to 10.0% with Under, 5.0% is more preferably less than, more preferably less than 3.0%, more preferably it is less than 1.0%.

Bi2O3Composition, Bi can be used as raw material2O3Deng.

TeO2Composition is, when content is more than 0%, can improve refractive index, reduces partial dispersion ratio, and can reduce Any condition of glass transition temperature.

On the other hand, by making TeO2The content of composition is below 5.0%, it is possible to reduce the coloring of glass, improves internal Transmissivity.In addition, by reducing TeO costly2The use of composition, can obtain the less expensive glass of material cost.Therefore, TeO2The content of composition, it is usually desirable to less than 5.0%, is more preferably less than 3.0%, is more preferably less than 1.0%.

TeO2Composition, TeO can be used as raw material2Deng.

SnO2Composition is, when content is more than 0%, the glass of melting can be made limpid (deaeration), and can improve glass Any condition of the transmission of visible light of glass.

On the other hand, by making SnO2The content of composition can make to cause due to the reduction of melten glass below 1.0% The coloring of glass and the devitrification of glass be difficult to occur.Further, since SnO can be reduced2Composition is with fusion apparatus (particularly The noble metals such as Pt) alloying, therefore fusion apparatus service life more long can be realized.Therefore, SnO2The content of composition, than Preferably less than 1.0%, 0.5% is more preferably less than, more preferably less than 0.1%.

SnO2Composition, SnO, SnO can be used as raw material2、SnF2、SnF4Deng.

Sb2O3Composition is, when content is more than 0%, promotes the deaeration of glass, makes the composition that glass is limpid, is of the invention Any condition in optical glass.Sb2O3Composition, by make its content be relative to less than the 1.0% of glass gross mass, can be with Excessive foaming when making glass melting is difficult to be occurred, and can make Sb2O3The conjunction of composition and fusion apparatus (noble metal such as particularly Pt) Aurification is difficult to be occurred.Accordingly, with respect to the Sb of the glass gross mass of oxide conversion composition2O3The containing ratio of composition, it is more satisfactory Be with 1.0% be the upper limit, be more preferably the upper limit with 0.8%, be the upper limit more preferably with 0.6%.Herein, Particularly from from the point of view of relatively easily obtaining the relatively low optical glass of solarization, the total matter of glass of oxide conversion composition Amount Sb2O3The content of composition, it is usually desirable to 0.5% be the upper limit, is more preferably the upper limit with 0.3%, more preferable Be with 0.1% be the upper limit.

In addition, as making glass limpid and deaeration composition, being not limited in above-mentioned Sb2O3Composition, it is also possible to use glass The fining agent and deaeration agent or combinations thereof being widely known by the people in manufacture field.

Relative to ZrO2Composition and Li2The content sum of O compositions, Li2O compositions and K2The content sum of O compositions Than, it is usually desirable to more than 0~less than 2.5.

Particularly, by making the mass ratio more than 0, increased devitrification resistance and transmissivity can be improved.

Therefore, (Li2O+K2O)/(ZrO2+Li2O lower limit), it is usually desirable to more than 0%, more preferably greatly In 0.1%, more preferably more than 0.3%.

On the other hand, by making the mass ratio less than 2.5, in the state of the refractive index for keeping glass, glass can be reduced The anomalous dispersion of glass.Therefore, (Li2O+K2O)/(ZrO2+Li2O higher limit), it is usually desirable to less than 2.5, more manage What is thought is less than 2.1, more preferably less than 2.0, is more preferably less than 1.5, more preferably less than 1.0, more Ideally might be less that 0.5.

SiO2Composition and Nb2O5The total amount (quality sum) of composition, it is usually desirable to more than 50.0%.Accordingly, can be with Obtain chemical durability well and anomalous dispersion is smaller, the preferable glass of the mouldability with certain viscosity.

Therefore, quality sum, it is usually desirable to more than 50.0%, more preferably more than 53.0%, more manage What is thought is more than 54.0%, more preferably can also more than 58.0%.

On the other hand, quality sum, it is usually desirable to less than 90.0%, is more preferably less than 85.0%, more Plus ideally less than 81.0%, more preferably might be less that 76.0%.

Ln2O3Content sum (the matter of composition (in formula, Ln is more than a kind selected from the group being made up of La, Gd, Y, Yb) Amount sum), it is usually desirable to less than 15.0%.Accordingly, it is possible to reduce the devitrification of glass, the rising of Abbe number is suppressed, and The material cost of glass can be reduced.Therefore, Ln2O3The quality sum of composition, it is usually desirable to less than 15.0%, more manages That thinks is less than 10.0%, more preferably less than 5.0%, is more preferably less than 3.5%.

By making Rn2The content sum of O compositions (in formula, Rn is more than a kind selected from the group being made up of Li, Na, K) (quality sum) is more than 0%, can improve the meltbility of frit, and reduce glass transition temperature.Therefore, Rn2O into Point content, it is usually desirable to more than 0%, more preferably more than 5.0%, more preferably more than 5.0%, more Preferably more than 8.0%, more preferably more than 10.0%, 10.0% is more preferably greater than, more preferably More than 12.0%, can also more preferably be more than 13.0%.

On the other hand, Rn2The content of O compositions (in formula, Rn is more than a kind selected from the group being made up of Li, Na, K) Sum (quality sum), it is usually desirable to less than 30.0%.Accordingly, the refractive index of glass can be made to be difficult to reduce, and can To reduce devitrification when forming glass.In addition, by increasing the viscosity in glass, mouldability can be improved.Therefore, Rn2O compositions Total content, it is usually desirable to 30.0% be the upper limit, be more preferably the upper limit with 25.0%, more preferably It is the upper limit with 20.0%, is more preferably the upper limit with 17.0%.

Content sum (the quality of RO compositions (in formula, R is more than a kind selected from the group being made up of Mg, Ca, Sr, Ba) Sum), it is usually desirable to less than 30.0%.Accordingly, it is possible to reduce by the mistake of the excessive glass for causing of the content of these compositions Thoroughly.Therefore, the quality sum of RO compositions, it is usually desirable to less than 30.0%, more preferably less than 25.0%, more manage What is thought is less than 20.0%, more preferably less than 15.0%, it is more preferably small more preferably less than 10.0% In 5.0%.

On the other hand, the quality sum of RO compositions, from improving the meltbility of frit, and reduces the angle of devitrification and examines Consider, it is usually desirable to more than 0%, more preferably more than 1.0%, more preferably can also be more than 2.0%.

<On the composition that should not contain>

Secondly, to the composition that should not contain in optical glass of the invention and do not contain the composition being preferred and say It is bright.

For other compositions, can as needed be added in the range of the glass performance for not destroying the present application Plus.But, in addition to Ti, Zr, Nb, W, La, Gd, Y, Yb, Lu, the various mistakes such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo Cross metal ingredient, though with individually or mixedly containing a small amount of each composition in the case of glass can also colour, pair can See the characteristic that the specific wavelength in region is absorbed, therefore particularly in using the optical glass of the wavelength of visibility region, it is real Do not contained on border and be preferred.

In addition, the lead compound such as PbO and As2O3It is due to being environmental pressure composition higher therefore real Deng arsenic compound Do not contained on border and be preferred, i.e., do not contained without exception in addition to being inevitably mixed into and be preferred.

Additionally, each composition of Th, Cd, Tl, Os, Be and Se, have in recent years and limit it as harmful chemical and use Trend, not only in the production process of glass, and treatment process and until commercialization after treatment on, be required for Environmental protective measure.Therefore, in the case where the influence to environment is paid attention to, these compositions are not contained actually and is preferred.

[manufacture method]

Optical glass of the invention, for example, being carried out as follows manufacture.That is, to make each composition in the content model of regulation Enclose interior and equably mix above-mentioned raw materials, manufactured mixture is being put into platinum crucible, silica crucible or alumina crucible In carry out pre-fusion after, be put into golden crucible, platinum crucible, platinum alloy crucibles or iridium crucible and in 1000~1400 DEG C of temperature Melted 3~5 hours in the range of degree, uniform stirring simultaneously carries out froth breaking etc., and temperature then is reduced into 900~1100 DEG C is carried out afterwards Final stirring and remove striped, and poured into and make in mould its Slow cooling and manufactured.

<Physical property>

Optical glass of the invention has the Abbe number of high index of refraction and prescribed limit.

Refractive index (the n of optical glass of the inventiond), it is usually desirable to 1.60 be lower limit, more preferably with 1.63 is lower limit, is lower limit more preferably with 1.65.The refractive index, it is usually desirable to 1.78 be the upper limit, more manages Think be with 1.77 be the upper limit, be more preferably the upper limit with 1.76, be the upper limit more preferably with 1.75, it is even more ideal Be with 1.73 be the upper limit, be the upper limit more preferably with 1.70.

Abbe number (the ν of optical glass of the inventiond), it is usually desirable to 28 it is lower limit, more preferably with 29 It is lower limit, is lower limit more preferably with 30, be more preferably lower limit with 31, is lower limit more preferably with 33. On the other hand, the Abbe number (ν of optical glass of the inventiond), it is usually desirable to 47 it is the upper limit, more preferably with 45 It is the upper limit, is more preferably the upper limit with 43, be the upper limit more preferably with 42, is more preferably the upper limit with 41, It is the upper limit more preferably with 40.

Optical glass of the invention with such refractive index and Abbe number is beneficial to optical design, particularly, no The miniaturization of imaging characteristic higher etc. and optical system can be only realized, the free degree that can be designed with expansion optical.

Optical glass of the invention has relatively low partial dispersion ratio (θ g, F).

More specifically, the partial dispersion ratio (θ g, F) of optical glass of the invention and Abbe number (νd) meet (- 0.00256×νd+ 0.637)≤(θ g, F)≤(- 0.00256 × νd+ 0.684) relation is preferred.

Therefore, in optical glass of the invention, partial dispersion ratio (θ g, F) and Abbe number (νd), it is usually desirable to Meet θ g, F≤(- 0.00256 × νd+ 0.637) relation, more preferably meets θ g, F≤(- 0.00256 × νd+ 0.647) relation, more preferably meets θ g, F≤(- 0.00256 × νd+ 0.657) relation.

On the other hand, in optical glass of the invention, partial dispersion ratio (θ g, F) and Abbe number (νd), it is more satisfactory Be to meet θ g, F≤(- 0.00256 × νd+ 0.684) relation, more preferably meets θ g, F≤(- 0.00256 × νd+ 0.681) relation, more preferably meets θ g, F≤(- 0.00256 × νd+ 0.677) relation.

Accordingly, due to being obtained in that the optical glass with relatively low partial dispersion ratio (θ g, F), therefore by the optical glass The optical element of formation can aid in the hue difference for reducing optical system.

In addition, particularly in Abbe number (νd) in less region, the partial dispersion ratio (θ g, F) of simple glass is than mark Directrix value also high, with Abbe number (νd) for transverse axis, partial dispersion ratio (θ g, F) be the longitudinal axis when, the partial dispersion ratio of simple glass (θ g, F) and Abbe number (νd) relation, can be represented with the gradient curve bigger than normal line.In above-mentioned partial dispersion ratio (θ g, F) and Abbe number (νd) relational expression in, these relations are specified by using the gradient straight line bigger than normal line, show Go out to be obtained in that the smaller glass of partial dispersion ratio (θ g, F) compared with simple glass.

In the present invention, surface weatherability, it is usually desirable to 1 grade or 2 grades, more preferably 1 grade.Herein, table Face weatherability is measured by using tests below method.

The sample of the burnishing surface with 30mm × 30mm × 3mm is used as test film, is 60 DEG C, relative humidity in temperature It is to expose 96 hours in 95% constant temperature and humidity cabinet, then with 50 times of micro- sem observation burnishing surface and observes the state of mildew. Determinating reference is not observed completely when being observed the sample after 96 hours test under the Lux of illumination 1500 mould The sample of spot is set to 1 grade, mildew is not observed when being observed under 100 Luxs but mildew is observed under 1500 Luxs Sample is set to 2 grades, observes that the sample of mildew is set to 3 grades when being observed under 100 Luxs.In addition, the sample for 3 grades, weight It is new to be exposed in the constant temperature and humidity cabinet that temperature is 50 DEG C, relative humidity is 85% 6 hours, then thrown with 50 times of micro- sem observation Smooth surface, observes that the sample of mildew is set to 4 grades under 1500 Luxs.Not it was observed that the sample of mildew is still set to 3 grades.

In addition, in this manual, " surface weatherability " is represented, such as when as lens preform material, long-time makes Used time, the keeping environment according to optical glass, the quality of the mildew state in exposure during certain.

Optical glass of the invention, is preferred less with colouring.

Particularly, optical glass of the invention, if represented with the transmissivity of glass, in the sample of thickness 10mm Spectral-transmission favtor shows 80% wavelength (λ80), it is usually desirable to below 420nm, more preferably below 400nm, more Preferably below 380nm.

In addition, optical glass of the invention, spectral-transmission favtor shows 5% wavelength (λ in the sample of thickness 10mm5), Desirably below 365nm, more preferably below 345nm, more preferably below 330nm.

Accordingly, the absorption edge of glass is located at the vicinity of ultraviolet region, improves the transparency of the glass of visible region, because This can preferably be applied the optical glass as the material of the optical elements such as lens.

In addition, optical glass of the invention, it is desirable to which devitrification resistance is higher.Accordingly, can suppress by glass when glass is manufactured The reduction of the transmissivity that crystallization of glass etc. causes, therefore the optical glass can be preferably employed in lens etc. and make visible ray In the optical element of transmission.Particularly, optical glass of the invention, preferably with less than 1200 DEG C of relatively low liquid phase temperature Degree.More specifically, the liquidus temperature of optical glass of the invention, it is usually desirable to 1200 DEG C be the upper limit, it is even more ideal Be with 1150 DEG C be the upper limit, be the upper limit more preferably with 1100 DEG C, be more preferably the upper limit with 1050 DEG C.According to This, though melten glass with lower temperature flow out, due to manufactured glass degree of crystallization reduction, therefore can improve from Molten condition formed glass when devitrification resistance, and can reduce to using glass optical element optical characteristics influence. On the other hand, the lower limit to the liquidus temperature of optical glass of the invention is not particularly limited, but obtained by the present invention The liquidus temperature of glass, substantially more than 500 DEG C, specifically more than 550 DEG C, more specifically more than 600 DEG C It is in the majority.In addition, " liquidus temperature " in this specification refers to, the particle for being ground into a diameter of 2mm or so is placed on platinum plate Shape glass specimen, takes out after being kept for 30 minutes in the stove of the thermograde with 800 DEG C to 1220 DEG C, after cooling by using Multiplying power does not find to crystallize in glass and does not produce devitrification to have nodeless mesh to be measured in 80 times of microscope sight glass Minimum temperature.

[prefabricated component and optical element]

On the basis of manufactured optical glass, by using such as heat stamping and shaping and precise punch forming etc. again The method of compression molding, it is possible to produce glass forming body.That is, it is possible to use optical glass manufacture compression molding is with advance Product, and the prefabricated component is carried out to be processed by shot blasting and manufacture glass forming body after heat stamping and shaping again, such as it is right The prefabricated component manufactured by being processed by shot blasting carries out precise punch forming and manufactures glass forming body.Additionally, manufacture glass The method of formed body, is not limited in these methods.

So the glass forming body of manufacture, is beneficial to various optical elements, wherein be particularly, for lens or prism etc. The purposes of optical element is preferred.Accordingly, in the transmitted light of the optical system of optical element is provided with, it is possible to reduce due to chromatic aberation The color fringe for causing.Therefore, in the case where the optical element is applied into camera, can more accurately show to be shot Thing, in the case where the optical element is applied into projecting apparatus, can project to more high-resolution required image.

【Embodiment】

In 1~table of table 12, expression embodiments of the invention (No.A1~No.A28, No.B1~No.B52, No.C1~ No.C3) and comparative example (No.a, No.b) composition and refractive index (nd), Abbe number (νd), partial dispersion ratio (θ g, F), light Spectrum transmissivity shows 5% and 80% wavelength (λ5、λ80), liquidus temperature, the result of surface weatherability.Herein, embodiment (No.A1~No.A28, No.C1~No.C3) can as the embodiment of the first optical glass, embodiment (No.B1~ No.B52, No.C1~No.C3) can also be used as the embodiment of the second optical glass.In addition, following examples are to show all the time For the purpose of example, it is not limited in these embodiments.

The glass of embodiment and comparative example, select be respectively equivalent to the oxide of each component materials, hydroxide, High purity raw used in the common optical glass such as carbonate, nitrate, fluoride, hydroxide, metaphosphoric acid compound Material, after the proportion of composing weighing of each embodiment shown in table and comparative example and equably mixing, puts into quartz crucible (root Platinum crucible, aluminium crucible can also be used according to the meltbility of glass) in, and existed according to the melting difficulty electric furnace that glass is constituted It is transferred in platinum crucible after being melted 0.5~5 hour within the temperature range of 1100 DEG C~1400 DEG C, uniform stirring simultaneously carries out froth breaking Deng after, 1000~1400 DEG C are dropped temperature to, stirred, then poured into and make its Slow cooling in mould, so as to manufacture Glass.

Refractive index (the n of the glass of embodiment and comparative exampled), Abbe number (νd) and partial dispersion ratio (θ g, F), according to day This optics nitre industry meeting standard JOGIS01-2003 is measured.

Additionally, the glass for being used in this measurement, use and Slow cooling cooling rate is set to -25 DEG C/hr has been used in combination The glass that annealing furnace is processed.

The surface weatherability of embodiment and comparative example is evaluated according to following methods.

The sample of the burnishing surface with 30mm × 30mm × 3mm is used as test film, is 60 DEG C, relative humidity in temperature It is to expose 96 hours in 95% constant temperature and humidity cabinet, then with 50 times of micro- sem observation burnishing surface and observes the state of mildew. Determinating reference is not observed completely when being observed the sample after 96 hours test under the Lux of illumination 1500 mould The sample of spot is defined as 1 grade, mildew is not observed when being observed under 100 Luxs but mildew is observed under 1500 Luxs Sample be defined as 2 grades, under 100 Luxs observe when observe that the sample of mildew is defined as 3 grades.In addition, the examination for 3 grades Sample, exposes 6 hours, then with 50 times of microscope in the constant temperature and humidity cabinet that temperature is 50 DEG C, relative humidity is 85% again Observation burnishing surface, observes that the sample of mildew is defined as 4 grades under 1500 Luxs.Not it was observed that the sample of mildew is still defined as 3 grades.

The transmissivity of the glass of embodiment and comparative example, is carried out according to Japanese Optical nitre industry meeting standard JOGIS02 Determine.Additionally, in the present invention, by determining the transmissivity of glass, tried to achieve glass coloring whether and its degree.Specifically Say, to the opposing parallel polishing product of 10 ± 0.1mm of thickness, according to JISZ8722, determine the spectral-transmission favtor of 200~800nm, ask Obtain λ5(wavelength during transmissivity 5%) and λ80(wavelength during transmissivity 80%).

The liquidus temperature of embodiment and comparative example, the glass being spaced apart after crushing with 10mm on platinum plate is tried Sample, takes out, by using multiplying power after cooling after it is kept for 30 minutes in the stove of the thermograde with 800 DEG C to 1200 DEG C It is measured to have nodeless mesh in 80 times of microscope sight glass sample.Now, optical glass is ground into as sample The graininess of a diameter of 2mm or so.

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

As these are shown in Table, the optical glass of embodiments of the invention, partial dispersion ratio (θ g, F) and Abbe number (νd) full Foot (- 0.00256 × νd+ 0.637)≤(θ g, F)≤(- 0.00256 × νd+ 0.684) relation, more specifically, meet (- 0.00256×νd+ 0.657)≤(θ g, F)≤(- 0.00256 × νd+ 0.679) relation.Particularly, embodiment (No.B1~ No.B52, No.C1~No.C3) optical glass meet (- 0.00256 × νd+ 0.657)≤(θ g, F)≤(- 0.00256 × νd+ 0.677) relation.Here, the partial dispersion ratio (θ g, F) of the glass on the embodiment of the present application and Abbe number (νd) relation, As shown in Figure 2.

The optical glass of embodiments of the invention, refractive index (nd) more than 1.60, more specifically 1.65 with On, and the refractive index (nd) below 1.78, more specifically below 1.76, in required scope.Particularly, The optical glass of embodiment (No.A1~No.A28, No.C1~No.C3), refractive index (nd) below 1.75, more specifically It is below 1.73.

In addition, the optical glass of embodiments of the invention, Abbe number (νd) more than 28, more specifically 30 with On, i.e., in required scope.In addition, the optical glass of embodiments of the invention, Abbe number (νd) below 47, more specifically Say it is below 46, in required scope in ground.Particularly, the light of embodiment (No.A1~No.A28, No.C1~No.C3) Learn glass, Abbe number (νd) below 43.

Additionally, the optical glass of embodiments of the invention, λ80(wavelength during transmissivity 80%) in below 420nm, more Specifically in below 400nm.Particularly, the optical glass of embodiment (No.A1~No.A28, No.C1~No.C3), λ80 (wavelength during transmissivity 80%) is in below 390nm.

In addition, the optical glass of embodiments of the invention, λ5(wavelength during transmissivity 5%) in below 365nm, more Say that it, in below 345nm, is more particularly in below 340nm to be body.Particularly, embodiment (No.A1~No.A28, No.C1~No.C3) optical glass, λ5(wavelength during transmissivity 5%) is in below 335nm.

Therefore, it can the optical glass of clear and definite embodiments of the invention, it is higher to the transmissivity of visible ray and be difficult to colour.

In addition, the optical glass of embodiments of the invention (No.A1~No.A28, No.C1~No.C3), liquidus temperature exists Less than 1200 DEG C, be more particularly below 1050 DEG C more specifically below 1110 DEG C.Therefore, these optics Glass, it is difficult to which the devitrification that is caused by reheating and milky white occurs, therefore with the compressing property of reheating higher.

In addition, the optical glass of embodiments of the invention (No.B1~No.B52, No.C1~No.C3), surface weatherability It is 1 grade.

Therefore, it can clear and definite these optical glass is that surface weatherability is good, it is difficult to produce the optics glass of so-called mildew Glass.

Additionally, using the optical glass of embodiments of the invention, forming glass blocks, grinding is carried out to the glass blocks and is ground Mill, and it is processed into the shape of lens and prefabricated component.As a result, various lens and prefabricated component can be stably processed into Shape.

In addition, the optical glass described in comparative example (No.b), although meet required optical constant (nd、νd), but by In by upper section dispersion ratio, anomalous dispersion is smaller and transmissivity and chemical durability are poor, thus fail to be made It is the refractive index (n of the purpose of the present inventiond) and Abbe number (νd) in required scope, and partial dispersion ratio (θ g, F) The smaller and good optical glass of surface weatherability.

More than, the present invention is illustrated for exemplary purposes, but the present embodiment is all the time only with example as mesh , it should be understood that in the case where thought of the invention and scope is not departed from, those skilled in the art can be carried out Various changes.

Claims (12)

1. a kind of optical glass, it is characterised in that calculated with the quality % of oxide conversion composition,
Contain SiO2Composition 20.0~60.0%,
Nb2O5Composition 10.0~50.0%,
Also, partial dispersion ratio (θ g, F) and Abbe number (νd) meet (- 0.00256 × νd+ 0.637)≤(θ g, F)≤(- 0.00256×νd+ 0.684) relation.
2. optical glass according to claim 1, it is characterised in that calculated with the quality % of oxide conversion composition, contained There is ZrO2Composition 0~20.0%.
3. optical glass according to claim 1 and 2, it is characterised in that calculated with the quality % of oxide conversion composition, Contain K2O compositions 0~15.0%.
4. the optical glass according to any one of claims 1 to 3, it is characterised in that surface weatherability grade is 1 grade Or 2 grades.
5. the optical glass according to any one of Claims 1-4, it is characterised in that
Calculated with the quality % of oxide conversion composition,
ZnO component is 0~25.0%,
Li2O compositions are 0~20.0%,
Na2O compositions are 0~20.0%,
B2O3Composition is 0~20.0%,
TiO2Composition is 0~15.0%,
MgO compositions are 0~10.0%,
CaO compositions are 0~10.0%,
SrO compositions are 0~10.0%,
BaO compositions are 0~10.0%,
La2O3Composition is 0~10.0%,
Gd2O3Composition is 0~10.0%,
Y2O3Composition is 0~10.0%,
Yb2O3Composition is 0~10.0%,
Ta2O5Composition is 0~10.0%,
WO3Composition is 0~10.0%,
P2O5Composition is 0~10.0%,
GeO2Composition is 0~10.0%,
Al2O3Composition is 0~10.0%,
Ga2O3Composition is 0~10.0%,
Bi2O3Composition is 0~10.0%,
TeO2Composition is 0~5.0%,
SnO2Composition is 0~5.0%,
Sb2O3Composition is 0~1.0%.
6. the optical glass according to any one of claim 1 to 5, it is characterised in that mass ratio (Li2O+K2O)/ (ZrO2+Li2O) be more than 0~less than 2.5.
7. the optical glass according to any one of claim 1 to 6, it is characterised in that SiO2Composition and Nb2O5Composition Content sum be more than 50.0%.
8. the optical glass according to any one of claim 1 to 7, it is characterised in that
Calculated with the standard quality % of oxide,
Ln2O3The quality sum of composition is 0~15.0%, and in formula, Ln is a kind selected from the group being made up of La, Gd, Y, Yb More than,
The quality sum of RO compositions be 0~30.0%, in formula, R be from the group being made up of Mg, Ca, Sr, Ba select a kind with On,
Rn2The quality sum of O compositions is 0~30.0%, and in formula, Rn is more than a kind selected from the group being made up of Li, Na, K.
9. the optical glass according to any one of claim 1 to 8, it is characterised in that with more than 1.60 1.78 with Under refractive index (nd) and less than more than 28 47 Abbe number (νd)。
10. the optical glass according to any one of claim 1 to 9, it is characterised in that spectral-transmission favtor shows 80% Wavelength (λ80) it is below 420nm, spectral-transmission favtor shows 5% wavelength (λ5) it is below 365nm.
The prefabricated component of a kind of 11. attrition process use and/or precise punch forming, it is by any of claim 1 to 10 Optical glass described in one is constituted.
A kind of 12. optical elements, the optical glass described in its any one by claim 1 to 10 is constituted.
CN201611197867.6A 2015-12-25 2016-12-22 A kind of optical glass, prefabricated component and optical element CN106915901A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108069591A (en) * 2017-12-13 2018-05-25 成都光明光电股份有限公司 Glass composition and chemically toughened glass

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN1099388C (en) * 1998-02-10 2003-01-22 株式会社小原 Optical glass having negative abnormal dispersion
CN1135207C (en) * 1997-03-25 2004-01-21 株式会社小原 Optical glass with negative anomalous dispersion
CN104926110A (en) * 2015-06-23 2015-09-23 成都光明光电股份有限公司 Optical glass and optical component
CN106830677A (en) * 2015-12-07 2017-06-13 株式会社小原 A kind of optical glass, prefabricated component and optical element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1135207C (en) * 1997-03-25 2004-01-21 株式会社小原 Optical glass with negative anomalous dispersion
CN1099388C (en) * 1998-02-10 2003-01-22 株式会社小原 Optical glass having negative abnormal dispersion
CN104926110A (en) * 2015-06-23 2015-09-23 成都光明光电股份有限公司 Optical glass and optical component
CN106830677A (en) * 2015-12-07 2017-06-13 株式会社小原 A kind of optical glass, prefabricated component and optical element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108069591A (en) * 2017-12-13 2018-05-25 成都光明光电股份有限公司 Glass composition and chemically toughened glass

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