CN106830677A - 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
CN106830677A
CN106830677A CN201611110415.XA CN201611110415A CN106830677A CN 106830677 A CN106830677 A CN 106830677A CN 201611110415 A CN201611110415 A CN 201611110415A CN 106830677 A CN106830677 A CN 106830677A
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composition
glass
optical
optical glass
compositions
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CN201611110415.XA
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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 JP2015238990 priority Critical
Priority to JP2015-238989 priority
Priority to JP2015238989 priority
Priority to JP2015-238990 priority
Priority to JP2016-234493 priority
Priority to JP2016-234492 priority
Priority to JP2016234493A priority patent/JP2017105703A/en
Priority to JP2016234492A priority patent/JP2017105702A/en
Application filed by 株式会社小原 filed Critical 株式会社小原
Publication of CN106830677A publication Critical patent/CN106830677A/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
    • 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made

Abstract

The present invention can obtain a kind of refractive index (n with less expensive priced) and Abbe number (νd) optical glass in required scope.The optical glass, is calculated with the quality % of oxide conversion composition, contains SiO2Composition 15.0~50.0%, Nb2O5Composition 20.0~50.0%.In this optical glass, partial dispersion ratio (θ g, F) and Abbe number (νd) between, (0.00256 × ν can be metd+0.637)≦(θg,F)≦(‑0.00256×νd+ 0.689) relation.In addition, being made in reheating stamping procedure and can also obtain the glass for being not likely to produce milky white or devitrification and atomization when processing glass.

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

In recent years, using optical system equipment digitlization and Qinghua high developing rapidly, digital camera with It is right in the various optical instrument fields such as the video playbacks such as the photographic goods such as video camera, projecting apparatus and projection TV (projection) equipment The quantity of the optical element such as the lens that are used in optical system of reduction and prism, and by whole optical system lightweight and The requirement more and more higher of miniaturization.

In for the optical glass for manufacturing optical element, particularly, the lightweight to whole optical system can be realized And miniaturization with more than 1.65 refractive index (nd) and less than more than 28 45 Abbe number (νd) optical glass need Asking becomes very high.As such optical glass, as described in patent document 1~3 with SiO2-Nb2O5It is the light for main component Glass is learned to be widely known by the people.

【Patent document 1】Japanese Patent Laid-Open 2007-169157 publications

【Patent document 2】The special table WO02/014235 publications public again of Japanese documentation

【Patent document 3】The flat 10-130033 publications of Japanese Patent Laid-Open

The technical problems to be solved by the invention

As the method from optical glass manufacture optical element, it is thus well known that have following several:For example, to by optics glass The method that material block or the glass blocks that glass is formed are ground and polish and obtain the shape of optical element;To by optical glass The material block or glass blocks of formation carry out reheating shaping (reheating is compressing) and obtain glass forming body, then it is ground Mill and the method for polishing;And, the prefabricated component to being obtained by material block or glass blocks is carried out into the mould of Ultra-precision Turning Type (precise compression molding) and the method that obtains the shape of optical element.A kind of method of any of the above, be required to from melting When frit forms material block or glass blocks, the glass of stabilization is obtained in that.Herein, obtained by composition material block or The glass of glass blocks for devitrification stability (devitrification resistance) reduction and inside glass formed crystallize when, it is impossible to be adapted to As the glass of optical element.

Particularly, with more than 1.65 refractive index (nd), Abbe number (νd) SiO when being less than more than 28 452- Nb2O5In being the optical glass for main component, the less stable of the optical glass after reheating is compressing, in inside glass Strong milky white tendency and more significant tendency towards devitrification can be produced.Therefore, by the compressing such thermal technology again of reheating Sequence and make the manufacture method of shape, the less stable of optical glass, it is impossible to obtain the optical glass of quality is good.

In addition, the optical system such as digital camera or video camera, more or less there is the color fringe referred to as aberration (color fringing) phenomenon.This aberration is divided into monochromatic aberration and chromatic aberation, particularly chromatic aberation and largely takes The material property of the lens certainly used in optical system.

Usual chromatic aberation is corrected by the concavees lens of the convex lens and dispersion high that combine low dispersion, but this combination only may be used To correct the aberration of red area and green area, and remain the aberration of blue region.This blue region that cannot be removed Aberration is referred to as second order spectrum.Correction second order spectrum needs to consider the g lines (435.835nm) of blue region when optical design is carried out Trend.Now, as the index of the optical characteristics got most of the attention in optical design, using partial dispersion ratio (θ g, F). In the optical system of the combinations thereof convex lens of low dispersion and the concavees lens of dispersion high, by the lens of low dispersion side Using the optical material that partial dispersion ratio (θ g, F) is larger, and partial dispersion ratio (θ g, F) is used in the lens of dispersion side high 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 (ν d) is fastened for the rectangular co-ordinate of transverse axis, with connection mark and draw NSL7 and PBM2 partial dispersion ratio and 2 points of Abbe number Straight line represents, referred to as normal line (reference picture 1).As the normal glass of the benchmark of normal line, although according to the system of optical glass The different and different of producer are made, but each producer is defined (NSL7 and PBM2 using identical gradient and intercept It is the optical glass of Obara Corporation's manufacture, the Abbe number (ν of PBM2d) it is 36.3, partial dispersion ratio (θ g, F) is 0.5828, Abbe number (the ν of NSL7d) it is 60.5, partial dispersion ratio (θ g, F) is 0.5436.).

However, the glass described in patent document 2 is the glass of the optical constant with low-refraction and low dispersion, it is difficult to fill Point the lens of dispersion side high for requiring in recent years are met, although to meet required optics normal for the glass described in patent document 3 Number, but due to containing raw material Ta costly2O5Composition, therefore there is a problem of that lens price is very expensive.Additionally, patent is literary Offer glass described in 3, although also record the example without raw material costly, but punching formation property is poor, particularly in system Increased devitrification resistance when making punching press during lens turns into problem, it is difficult to produce production efficiency optical element higher.

In addition, the material cost in order to reduce optical glass, it is desirable to constitute the cost of material of the various composition of optical glass It is as cheap as possible.In addition, when optical glass is produced in batches, it is desirable to be not likely to produce devitrification when glass is manufactured.But, patent text The glass composition described in 1~3 is offered to be difficult to fully meet these various requirements.

The present invention is completed in view of the above problems, its object is to obtain a kind of refractive index (n with cheaper priced) And Abbe number (νd) optical glass in required scope.

In addition, the present invention also aims to obtain a kind of refractive index (n with cheaper priced) and Abbe number (νd) in required scope and partial dispersion ratio (θ g, F) less optical glass and one kind in inside glass not Produce milky white and devitrification optical glass.

The content of the invention

The present inventor etc. in order to solve the above problems, be repeated it is deep experiment and research result discovery, Containing SiO2Composition and Nb2O5In the glass of composition, can obtain not containing such as Ta2O5The prices such as composition raw material higher and The optical glass of material cost is reduced, so as to complete the present invention.

In addition, the present inventor etc. are in order to solve the above problems, the result of deep experiment and research is being repeated It has also been found that, containing SiO2Composition and Nb2O5Composition, SiO2/Rn2(Rn is a kind selected from the group being made up of Li, Na, K to O More than) be less than in 4.0 optical glass, can obtain not containing Ta2O5The prices such as composition raw material higher, reduce material into This and with relatively low partial dispersion than glass.

In addition, the present inventor etc. are in order to solve the above problems, the result of deep experiment and research is being repeated It has also been found that, containing SiO2Composition and Nb2O5Composition, and contain B2O3In the optical glass of composition 1.0~20.0%, can obtain Reduce that glass is milky white and optical glass of devitrification in reheating stamping procedure.

(1) a kind of optical glass, it is characterised in that calculated with the quality % of oxide conversion composition, contain SiO2Composition 15.0~50.0%, Nb2O5Composition 20.0~50.0%.

(2) optical glass according to above-mentioned (1), calculates SiO by quality ratio2/Rn2O be less than 4.0, wherein, Rn be from More than a kind selected in the group be made up of Li, Na, K.

(3) optical glass according to above-mentioned (1) or (2), with oxide conversion composition quality % calculate, ZnO into It is divided into 0~25.0%, ZrO2Composition is 0~25.0%.

(4) optical glass described in any one according to above-mentioned (1) to (3), with the quality % of oxide conversion composition Calculate, B2O3The content of composition is less than 20.0%.

(5) optical glass described in any one according to above-mentioned (1) to (4), with the quality % of oxide conversion composition Calculate,

TiO2Composition be 0~15.0%,

WO3Composition be 0~10.0%,

MgO compositions be 0~10.0%,

CaO compositions be 0~10.0%,

SrO compositions be 0~10.0%,

BaO compositions be 0~10.0%,

La2O3Composition be 0~10.0%,

Gd2O3Composition be 0~10.0%,

Y2O3Composition be 0~10.0%,

Yb2O3Composition be 0~10.0%,

Li2O compositions be 0~20.0%,

Na2O compositions be 0~20.0%,

K2O compositions be 0~10.0%,

Ta2O5Composition be 0~10.0%,

P2O5Composition be 0~10.0%,

GeO2Composition be 0~10.0%,

Al2O3Composition be 0~10.0%,

Ga2O3Composition be 0~10.0%,

Bi2O3Composition be 0~10.0%,

TeO2Composition be 0~5.0%,

SnO2Composition be 0~1.0%,

Sb2O3Composition is 0~1.0%.

(6) optical glass described in any one according to above-mentioned (1) to (5), is calculated with the quality % of oxide benchmark, Ln2O3The quality sum of composition is 0~15.0%, wherein, Ln is more than a kind selected from the group being made up of La, Gd, Y, Yb.

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

The quality sum of RO compositions be 0~20.0%, R be selected from the group being made up of Mg, Ca, Sr, Ba it is a kind of with On

(7) optical glass described in any one according to above-mentioned (1) to (6), partial dispersion ratio (θ g, F) and Abbe number (νd) between, meet (- 0.00256 × νd+0.637)≦(θg,F)≦(-0.00256×νd+ 0.689) relation.

(8) optical glass described in any one according to above-mentioned (1) to (7), does not produce before and after experiment (A) is reheated Raw devitrification and milky white,

The reheating tests (A):Test film 15mm × 15mm × 30mm is reheated, was made in 150 minutes Its from room temperature to the transition temperature (Tg) than each sample it is high 100 DEG C~120 DEG C of temperature, than the optical glass Glass transition temperature (Tg) is high 100 DEG C~120 DEG C at a temperature of be incubated 30 minutes, it is naturally cooled to normal temperature, it is right Two faces relative with test film are visually observed after being polished thickness 10mm.

(9) optical glass described in any one according to above-mentioned (1) to (8), refractive index (nd) be 1.65~1.80, Ah Shellfish number (νd) it is 28~45.

(10) optical glass described in any one according to above-mentioned (1) to (9), spectral-transmission favtor is expressed as 80% ripple (λ long80) in below 450nm, spectral-transmission favtor is expressed as 5% wavelength (λ5) in below 365nm.

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

(12) prefabricated component of a kind of polishing use and/or precise punch forming, by appointing for above-mentioned (1) to (10) Optical glass described in meaning one is constituted.

(13) a kind of optical instrument, it possesses the optical element described in above-mentioned (11) or (12).

Invention effect

In accordance with the invention it is possible to obtain a kind of refractive index (n with cheaper priced) and Abbe number (νd) in institute It is required that in the range of 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 partial dispersion ratio (θ g, F) less optical glass.I.e., it is possible to be produced by compression molding The more complicated optical element of shape, therefore low cost of manufacture and production efficiency optical element higher can be produced.

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 that glass is milky white and optical glass of devitrification in reheating stamping procedure.

Brief description of the drawings

Fig. 1 be with partial dispersion ratio (θ g, F) be the longitudinal axis, with Abbe number (νd) for transverse axis rectangular coordinate system shown in mark The schematic diagram of directrix.

Fig. 2 is partial 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 be 15.0~ 50.0%, Nb2O5Composition is 20.0~50.0%.

By containing SiO2Composition and Nb2O5Composition, can reduce refractive index (nd) and Abbe number (νd) wanting The material cost of the optical glass in the range of asking.

Wherein, the first optical glass, is calculated with the quality % of oxide conversion composition, contains SiO2Composition be 15.0~ 55.0%, Nb2O5Composition is 20.0~50.0%, is calculated by quality ratio, SiO2/Rn2Less than 4.0, (Rn is from by Li, Na, K group to O Into group in select more than a kind), partial dispersion ratio (θ g, F) and Abbe number (ν d) between, satisfaction (- 0.00256 × νd+ 0.637)≦(θg,F)≦(-0.00256×νd+ 0.689) relation.

In the first optical glass, by containing SiO2Composition and Nb2O5Composition, SiO2/Rn2O less than 4.0 (Rn be from More than a kind selected in the group be made up of Li, Na, K), while the material cost of optical glass is reduced, can also be had Have relatively low partial dispersion than glass.

Therefore, it is possible to obtain a kind of refractive index (n with cheaper priced) and Abbe number (νd) required In the range of, and partial dispersion ratio (θ g, F) is smaller, contributes to the optical glass of the chromatic aberation of reduction optical system.

Further, since it is higher to the transmissivity of visible ray, therefore can be with it is preferable that for transmiting visible ray.

In addition, the second optical glass, is calculated with the quality % of oxide conversion composition, contain SiO2Composition be 15.0~ 50.0%, Nb2O5Composition is 20.0~50.0%, Nb2O3Composition is 1.0~20.0%, and it is before and after experiment (A) is reheated Devitrification and milky white is not produced.

Second optical glass, is containing SiO2Composition and Nb2O5In the glass of composition, can obtain not only required by having In the range of high index of refraction or low Abbe number (dispersion high), and devitrification and milky white subtract during due to being reheated to glass It is few, therefore it is suitable to the compressing optical glass of reheating.

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 explanation The part of middle repetition, is suitably omitted sometimes, but does not limit the objective of invention.

[glass ingredient]

The compositing range for constituting each composition of optical glass of the invention is as described below.In this manual, if do not had Special instruction, the content of each composition is represented with the quality % of the glass gross mass relative to oxide conversion composition.Herein, " oxide conversion composition " refers to, assuming that the oxide, compound used as the raw material of glass constituent of the invention In the case that salt, metal fluoride etc. are all decomposed and change into oxide in melting, by the gross mass of the generation oxide As 100 mass %, the composition of contained each composition in expression glass.

<On required composition, any condition>

SiO2Composition is the glass for promoting to be formed stabilization, is reduced for the unaccommodated devitrification of optical glass (generation crystalline solid) Required composition.

Particularly, by making SiO2The content of composition is more than 15.0%, it is not necessary to partial dispersion ratio is significantly increased, can The glass good to obtain devitrification resistance.Furthermore it is possible to devitrification and coloring when reducing punching press.In addition, can reduce accordingly Devitrification and coloring during reheating.Therefore, SiO2The content of composition, it is usually desirable to 15.0% be lower limit, more manages Think be with 18.0% be lower limit, be lower limit more preferably with 20.0%, be more preferably lower limit with 25.0%, more Plus preferably with 27.0% be lower limit.

On the other hand, by making SiO2The content of composition can make refractive index be difficult to reduce below 50.0%, therefore can Relatively easily to obtain required high index of refraction, and also can suppress partial dispersion than rising.In addition, can press down accordingly The reduction of the meltbility of frit processed.Therefore, SiO2The content of composition, it is usually desirable to 50.0% be the upper limit, more It is preferably the upper limit with 48.0%, is the upper limit more preferably with 45.0%, is more preferably the upper limit with 40.0%.

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

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

Particularly, by making Nb2O5It is normal that the content of composition brings up to required optics more than 20.0%, by refractive index Count and be adjusted in the composition of the scope of the present invention, such that it is able to reduce anomalous dispersion.Therefore, Nb2O5Composition contains Amount, it is usually desirable to 20.0% be lower limit, is more preferably lower limit with 23.0%, more preferably with 25.0% It is lower limit, is more preferably lower limit with 28.0%, is lower limit more preferably with 30.0%.

On the other hand, by making Nb2O5The content of composition is below 50.0%, it is possible to reduce the material cost of glass.Separately Outward, suppress the rising of melting temperature during manufacture glass, and can reduce due to Nb2O5Lost caused by the content of composition is excessive Thoroughly.Therefore, Nb2O5The content of composition, it is usually desirable to 50.0% be the upper limit, is more preferably the upper limit with 45.0%, It is the upper limit more preferably with 44.0%, is more preferably the upper limit with 43.0%, is more preferably with 40.0% The upper limit.

Nb2O5Composition, Nb can be used as raw material2O5Deng.

For Rn2The SiO of O (Rn is more than a kind selected from the group being made up of Li, Na, K)2Content ratio, compare Ideally less than 4.0.

Accordingly, required optical constant can be obtained, but also anomalous dispersion can be reduced, can further reduced The liquidus temperature of glass.

Therefore, SiO2/Rn2O, it is usually desirable to less than 4.0%, is more preferably less than 3.7%, more preferably 3.5% is less than, 3.3% is more preferably less than.

On the other hand, by making SiO2/Rn2O is more than 0, and the viscosity of glass can be made to soften and improve stability and hold it Easy-formation.Therefore, SiO2/Rn2O, it is usually desirable to more than 0, is more preferably greater than 1.0, is more preferably more than 1.5, more preferably it is greater than 1.7.

For Nb2O5The content of composition, SiO2Composition and B2O3The ratio of composition sum, it is usually desirable to less than 2.0. Accordingly, anomalous dispersion can be not only kept, but also may be adjusted to required optical constant.Therefore, (SiO2+B2O3)/ Nb2O5, it is usually desirable to less than 2.0,1.7 are more preferably less than, more preferably less than 1.5, more preferably Less than 1.4.

On the other hand, by making (SiO2+B2O3)/Nb2O5More than 0, stabilization can be made and devitrification is difficult to.Therefore, (SiO2+B2O3)/Nb2O5, it is usually desirable to more than 0, more preferably more than 0.5, more preferably 0.8 with On, more preferably more than 0.9.

ZnO component is, cheap when content is more than 0%, and can reduce glass transition temperature it is any into Point.Therefore, the content of ZnO component, it is usually desirable to more than 0%, more preferably more than 0.5%, more preferably Can also be more than 1.0%.

On the other hand, by making the content of ZnO component below 25.0%, can not only reduce glass devitrification and Color, devitrification and coloring when particularly being reheated to glass, and also chemical durability can be improved.Therefore, ZnO into The content divided, it is usually desirable to below 25.0%, more preferably below 20.0%, be more preferably less than 16.0%, more preferably it is less than 10.0%.

ZnO component, ZnO, ZnF can be used as raw material2Deng.

ZrO2Composition is, when content is more than 0%, can improve the refractive index and Abbe number of glass, reduces part color Ratio is dissipated, and also any condition of devitrification resistance can be improved.In addition, devitrification and the coloring of glass can be reduced accordingly, it is special It is not devitrification and the coloring when being reheated to glass.Therefore, ZrO2The content of composition, it is usually desirable to more than 0%, More preferably more than 0.5%, more preferably more than 1.0%, more preferably more than 2.0%, more preferably Being can also be more than 3.0%.

On the other hand, by making ZrO2The content of composition is below 20.0%, it is possible to reduce devitrification, and also can relatively hold Change places and obtain the glass of more homogeneous.Therefore, ZrO2The content of composition, it is usually desirable to 20.0% be the upper limit, more manages Think be with 18.0% be the upper limit, be the upper limit more preferably with 15.0%, be more preferably the upper limit with 11.0%.

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

B2O3Composition is, when content is more than 0%, not only can improve devitrification by promoting the glass of formation stabilization Property, and also any condition of the meltbility of frit can be improved.Therefore, B2O3The content of composition, it is usually desirable to It is lower limit more than 0%, is more preferably lower limit with 1.0%, is lower limit more preferably with 2.0%, more preferably It with 3.0% is lower limit to be, can also be more preferably lower limit with 4.0%.

On the other hand, by making B2O3The content of composition can suppress the reduction of refractive index below 20.0%, and also Can suppress partial dispersion than rising.Therefore, B2O3The content of composition, it is usually desirable to below 20.0%, it is even more ideal Be below 15.0%, more preferably below 12.0%, to be more preferably less than 12.0%, more preferably Below 10.0%, 10.0% is more preferably less than, more preferably less than 8.0%, be more preferably less than 6.0%.

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

TiO2Composition is, when content is more than 0%, can improve the refractive index of glass, reduces Abbe number, and also can be with Improve any condition of devitrification resistance.

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, it is near the mark required by line therefore, it is possible to be readily available Lower part dispersion ratio.Therefore, TiO2The content of composition, it is usually desirable to below 15.0%, is more preferably less than 10.0%, more preferably less than 5.0%.Particularly, it is even more ideal from from the point of view of the anomalous dispersion for reducing glass Be free from.

TiO2Composition, TiO can be used as raw material2Deng.

WO3Composition is, when content is more than 0%, can improve refractive index and reduce Abbe number, improves the devitrification of glass Property, and also any condition of the meltbility of frit can be improved.

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

WO3Composition, WO can be used as raw material3Deng.

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

On the other hand, by making the content of MgO compositions below 10.0%, the reduction of refractive index can not only be suppressed, and And devitrification can also be reduced.Therefore, the content of MgO compositions, it is usually desirable to below 10.0%, be more preferably less than 5.0%, more preferably 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 are, when content is more than 0%, can not only reduce the material cost of glass, reduce Abbe number, reduce Devitrification, also, any condition of the meltbility of frit can also be improved.Therefore, the content of CaO compositions, more satisfactory Be more than 0%, more preferably more than 1.0%, more preferably can also be more than 2.0%.

On the other hand, by making the content of CaO compositions below 10.0%, reduction and the Abbe of refractive index can be suppressed Several rising, partial dispersion than rising, and also devitrification can be reduced.Therefore, the content of CaO compositions, it is usually desirable to It is the upper limit with 10.0%, is more preferably the upper limit with 9.0%, is the upper limit more preferably with 8.0%, more preferably It with 6.0% is the upper limit to be.

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

SrO compositions are, when content is more than 0%, can to improve any condition of refractive index and devitrification resistance.

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 10.0%, is more preferably less than 8.0%, more preferably less than 4.0%.

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, improve devitrification resistance And the meltbility of frit, and can be reduced compared with other alkaline earth constituents glass material cost it is any into Point.

Particularly, by making the content of BaO compositions below 10.0%, the reduction or mistake of chemical durability can be suppressed Thoroughly.Therefore, the content of BaO compositions, it is usually desirable to below 10.0%, is more preferably less than 8.0%, more preferable Be less than 4.0%, be more preferably less than 2.0%.

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

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

Particularly, by making La2O3Composition, Gd2O3Composition, Y2O3Composition and Yb2O3The content of composition is respectively 10.0% Hereinafter, the rising of Abbe number can be suppressed, reduces proportion, reduce devitrification, and also material cost can be reduced.Therefore, La2O3 Composition, Gd2O3Composition, Y2O3Composition and Yb2O3The content of composition, it is usually desirable to respectively below 10.0%, more manages What is thought is respectively below 5.0%, more preferably respectively below 3.0%, to be more preferably respectively smaller 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.

Li2O compositions are, when content is more than 0%, can reduce partial dispersion ratio, reduce glass transition temperature, and Any condition of the meltbility of frit can also be improved.Therefore, Li2The content of O compositions, it is usually desirable to more than 0%, More preferably it is ideal more preferably more than 3.0% more preferably more than 2.0% more than 1.0% Be can also be 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 reduce, and also can reduce because of the devitrification that content excessively causes.

Therefore, Li2The content of O compositions, it is usually desirable to below 20.0%, more preferably 15.0% with Under, more preferably less than 10.0%.

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, can reduce glass transition temperature, And any condition of the meltbility of frit can be improved.Therefore, Li2The content of O compositions, it is usually desirable to exceed 0%, more preferably more than 0.3%, more preferably more than 0.5%, more preferably can also be more than 1.0%.

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 reduce, and also can reduce because of the devitrification that content excessively causes.

Therefore, Nb2The content of O compositions, it is usually desirable to below 20.0%, more preferably 15.0% with Under, more preferably less than 10.0%.

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

K2O compositions are, when at least the content of any one is more than 0%, can improve the meltbility of frit, and Any condition of glass transition temperature can also be reduced.

On the other hand, by making K2The content of O compositions below 10.0%, 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 10.0% Hereinafter, 8.0% is more preferably less than, more preferably less than 5.0%.

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

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 also be improved.

On the other hand, by making Ta2O5The content of composition is below 10.0%, it is possible to reduce rare mineral resource Ta2O5Into Point usage amount, and glass easily melts at lower temperatures, therefore can reduce the production cost of glass.In addition, according to This can be reduced because of Ta2O5The devitrification of the excessive glass for causing of the content of composition.Therefore, Ta2O5The content of composition, it is more satisfactory Be below 10.0%, to be more preferably less than 5.0%, more preferably less than 3.0%, be more preferably 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.

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 P2O5The content mistake of composition The devitrifications for causing more.Therefore, P2O5The content of composition, it is usually desirable to below 10.0%, is more preferably less than 5.0%, more preferably 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 the refractive index of glass, and can reduce appointing for devitrification Meaning composition.

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

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 also any condition of devitrification resistance can be improved.

On the other hand, by making Al2O3Composition and Ga2O3The content of composition is respectively below 10.0%, it is possible to reduce by In Al2O3Composition and Ga2O3The excessive devitrification for causing of the content of composition.Therefore, Al2O3Composition and Ga2O3The content of composition, Desirably respectively below 10.0%, 5.0% is more preferably respectively smaller than, be more preferably respectively smaller than 3.0%, more preferably it is respectively smaller 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 also can reduce 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, internal transmission rate can be improved by reducing the coloring of glass.Therefore, Bi2O3The content of composition, it is usually desirable to Less than 10.0%, more preferably less than 5.0%, 3.0% is more preferably less than, more preferably 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 also can drop Any condition of lower glass transition temperatures.

On the other hand, by making TeO2The content of composition is below 5.0%, it is possible to reduce the coloring of glass and improve inside 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 5.0%, more preferably less than 3.0%, is more preferably less than 1.0%.

TeO2Composition, TeO can be used as raw material2Deng.

Sb2O3Composition is, when content is more than 0%, promotes the deaeration of glass, glass is become limpid composition, is this hair Any condition in bright optical glass.Sb2O3Composition, by making the content relative to glass gross mass below 1.0%, It can be made to be not likely to produce excessive foaming during glass melting, Sb can be made2O3Composition and fusion apparatus (your gold such as particularly Pt Category) alloying be difficult produce.Accordingly, with respect to the Sb of the glass gross mass of oxide conversion composition2O3The containing ratio of composition, It is the upper limit desirably with 1.0%, is more preferably the upper limit with 0.8%, is upper more preferably with 0.6% Limit.Herein, particularly aoxidized from being readily available from the point of view of the relatively low optical glass of solarization (solarization) The glass gross mass Sb of thing conversion composition2O3The content of composition, it is usually desirable to 0.5% be the upper limit, more preferably with 0.3% is the upper limit, and it with 0.1% is the upper limit that ideal is.

Therefore, make the composition of the limpid deaeration of glass, be not limited in above-mentioned Sb2O3Composition, it is possible to use in glass manufacture Well-known fining agent and deaeration agent or their compositions in field.

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 preferred below 15.0%.Accordingly, it is possible to reduce the devitrification of glass, suppress the rising of Abbe number, and also can subtract The material cost of few glass.Therefore, Ln2O3The quality sum of composition, it is usually desirable to less than 15.0% be the upper limit, more It is preferably the upper limit with less than 10.0%, is more preferably the upper limit with less than 5.0%, more preferably with 3.0% It is below the upper limit.

RO compositions (in formula, R be from the group being made up of Mg, Ca, Sr, Ba select more than one) content sum (matter Amount sum) it is preferred below 20.0%.Accordingly, it is possible to reduce due to the devitrification of the excessive glass for causing of the content of these compositions. Therefore, the quality sum of RO compositions, it is usually desirable to below 20.0%, more preferably below 15.0%, more Ideally less than 10.0%, 7.0% is more preferably less than, more preferably less than 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%.

Rn2O compositions (in formula, Rn be from the group being made up of Li, Na, K select more than one) content sum (quality Sum) it is preferred below 30.0%.Accordingly, the refractive index of glass can be made to be difficult to reduce, can also be reduced when glass is formed Devitrification.Therefore, Rn2The content of O compositions, it is usually desirable to below 30.0%, is the upper limit more preferably with 28.0%, More preferably it is the upper limit with 25.0%, is the upper limit more preferably with 20.0%, is more preferably with 16.0% The upper limit.

On the other hand, Rn2The quality sum of O compositions, from the meltbility of raising frit, and reduces glass transition From the point of view of temperature, it is usually desirable to more than 0%, more preferably more than 5.0%, more preferably exceed 7.0%, more preferably can also be more than 10.0%.

<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, 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 900~1400 DEG C is carried out afterwards Finally stirring and remove striped, and pour into mould makes its Slow cooling, so as to be manufactured.

[physical property]

Optical glass of the invention, it is usually desirable to the Abbe number in high index of refraction and prescribed limit.

Refractive index (the n of optical glass of the inventiond), it is usually desirable to 1.65 be lower limit, more preferably with 1.68 is lower limit, can be more preferably lower limit with 1.70.The upper limit of the refractive index, it is usually desirable to 1.80, more Preferably 1.78, more preferably 1.77, more preferably can also be 1.76.

Abbe number (the ν of optical glass of the inventiond), it is usually desirable to 28 it is lower limit, more preferably with 30 It is lower limit, can is more preferably lower limit with 30.5.On the other hand, the Abbe number (ν of optical glass of the inventiond), than It is preferably the upper limit with 45, is more preferably the upper limit with 43, is the upper limit more preferably with 40, more preferably It can be the upper limit with 38 to be.

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

Optical glass of the invention, it is usually desirable to 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) between, compare reason What is thought is to meet (- 0.00256 × νd+0.637)≦(θg,F)≦(-0.00256×νd+ 0.689) relation.

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+ 0.689) 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, the optical glass with relatively low partial dispersion ratio (θ g, F) can be obtained, therefore can be by by the optics The optical element that glass is formed reduces the chromatic aberation of optical system.

Therefore, particularly in Abbe number (νd) in less region, the partial dispersion ratio (θ g, F) of simple glass is higher than mark The value of directrix, with Abbe number (νd) for transverse axis, with partial dispersion ratio (θ g, F) be the longitudinal axis when, normal line can be compared with gradient Curve higher represents the partial dispersion ratio (θ g, F) and Abbe number (ν of simple glassd) relation.Above-mentioned partial dispersion ratio (θ g, F) with Abbe number (νd) relational expression represent and specify these relations so as to can by using the gradient straight line higher than normal line The glass smaller than simple glass to obtain partial dispersion ratio (θ g, F).

Optical glass of the invention, to colour less being preferred.

Particularly, in optical glass of the invention, if be indicated with the light transmittance of glass, thickness 10mm's Spectral-transmission favtor shows 80% wavelength (λ in sample80), it is usually desirable to below 450nm, more preferably 420nm with Under, more preferably below 410nm, more preferably below 400nm.

In addition, in optical glass of the invention, spectral-transmission favtor shows 5% wavelength in the sample of thickness 10mm (λ5), it is usually desirable to below 365nm, more preferably below 355nm, more preferably below 345nm.

Accordingly, the absorption edge of glass is located near ultraviolet region, improves the transparency of glass in visibility region, therefore can be with The optical glass is preferably used as the material of the optical elements such as lens.

In addition, optical glass of the invention devitrification resistance desirably higher.Accordingly, can be with when glass is manufactured Suppress the reduction of transmissivity caused by crystallization etc. of glass, therefore the optical glass can be preferably employed in lens etc. In making the optical element of visible light-transmissive.Particularly, optical glass of the invention, it may be desirable to less than 1200 DEG C Relatively low liquidus temperature.More specifically, the upper limit of the liquidus temperature of optical glass of the invention, preferably 1200 DEG C, more Preferably 1150 DEG C, more preferably more preferably 1100 DEG C, 1050 DEG C.Accordingly, even if the glass after melting is with lower temperature Degree outflow, due to manufactured glass degree of crystallization reduction, therefore can improve from molten condition formed glass when resistance to mistake Permeability, and can reduce to using glass optical element optical characteristics influence.On the other hand, not to optics of the invention The lower limit of the liquidus temperature of glass is particularly limited, but by the liquidus temperature of the glass for obtaining of the invention, substantially at 500 DEG C More than, it is more specifically in the majority more than 600 DEG C specifically more than 550 DEG C.Additionally, " the liquid phase in this specification Temperature " refers to that the bead glass test portion that will be ground into diameter 2mm or so is put on platinum plate, with from 800 DEG C to 1220 DEG C Thermograde stove in keep 30 minutes after take out, by the basis of microscopic observation glass that multiplying power is 80 times after cooling There is nodeless mesh to detect, crystallization is can't see in glass and the minimum temperature of devitrification is not produced.

Optical glass of the invention, is well preferred with punching formation property.That is, even if before and after experiment (A) is reheated Devitrification is not produced and milky white for preferable.Accordingly, due to also difficult during the reheating of the compressing processing of reheating is tested for simulating To produce devitrification and coloring, the light transmittance of glass is difficult to lose, and glass is carried out therefore, it is possible to relatively easily represent reheating compacting Processing and forming is again heat-treated.That is, due to complex-shaped optical element can be produced by compressing, therefore it is manufactured into This is low, and can produce the good optical element of production efficiency.

Herein, reheating experiment (A) can implement by the following method, i.e. by the experiment of 15mm × 15mm × 30mm Piece is put on spill refractory body and is put into reheating in electric furnace, from the transformation that normal temperature was heated to than each sample by 150 minutes Temperature (Tg) is high 100 DEG C~120 DEG C of temperature (falling into the temperature of refractory body), in the temperature after insulation 30 minutes, it is cooled to Normal temperature is simultaneously taken out outside stove, is that can internally observe and relative two sides is polished to thickness to be 10mm, then Glass specimen after polishing is visually observed.

Additionally, for reheat experiment (A) before and after whether there is devitrification and milky white, can confirm for example, by naked eyes, " do not send out Raw devitrification and milky white " refers to, for example with the test film reheated before experiment to the transmissivity of d lines divided by experiment (A) is reheated after Test film to the value of the transmissivity of the light (d lines) of wavelength 587.56nm, probably more than 0.80.

[prefabricated component and optical element]

On the basis of manufactured optical glass, by using such as reheating is compressing or precise punch forming etc. The method of compression molding, it is possible to produce glass forming body.That is, it is possible to use optical glass produces compression molding use Prefabricated component, and the prefabricated component is carried out to be processed by shot blasting and produce glass forming body after reheating is compressing, or example Precise punch forming such as is carried out to the prefabricated component manufactured by being processed by shot blasting and glass forming body is produced.Additionally, system The method for making glass shaping body, is not limited to these methods.

So the glass forming body of manufacture, is beneficial to various optical elements, particularly, for optics such as lens or prisms The purposes of element is preferred.Accordingly, in the transmitted light of the optical system of optical element is provided with, it is possible to reduce because chromatic aberation is drawn The color fringe for rising.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 table 1~17, expression embodiments of the invention (No.A1~No.A65, No.B1~No.B52, No.C1~ No.C3) and comparative example composition and refractive index (nd), Abbe number (νd), partial dispersion ratio (θ g, F), spectral-transmission favtor show 5% and 80% wavelength (λ5、λ80), liquidus temperature and reheat experiment (stamping die experiment) result.Wherein, embodiment (No.A1~No.A65, No.C1~No.C3) also can be used as the embodiment of the first optical glass.In addition, embodiment (No.B1~ No.B52, No.C1~No.C3) also can be used as the embodiment of the second optical glass.In addition, following examples are with example all the time For the purpose of, 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, input stone crucible (according to The meltbility of glass can also use platinum crucible and alumina crucible) in, and passed through according to the melting difficulty that glass is constituted Electric furnace melts 0.5~5 hour afterwards within the temperature range of 1100 DEG C~1400 DEG C, and to move on to stir in platinum crucible is carried out After froth breaking etc., reduce the temperature to 1000~1400 DEG C stir after then pour into mould, make its Slow cooling, so as to make Glass is made.

Refractive index (the n of the glass of embodiment and comparative exampled), Abbe number (νd) and partial dispersion ratio (θ g, F), according to Japanese Optical 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 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 thing of 10 ± 0.1mm of thickness, according to JISZ8722, determine the spectral-transmission favtor of 200~800nm, ask Obtained λ5(wavelength during transmissivity 5%) and λ80(wavelength during transmissivity 80%).

The liquidus temperature of embodiment and comparative example is to be put into platinum by the interval of 10mm by by the glass test portion of crushing Taken out on plate, and after it is kept for 30 minutes in the stove with the thermograde from 800 DEG C to 1200 DEG C, in multiplying power after cooling Detected to have nodeless mesh in 80 times of basis of microscopic observation glass test portion.Now, it is diameter 2mm or so optical glass to be crushed It is granular as sample.

In addition, for embodiment and the glass of comparative example, confirming whether there is devitrification before and after experiment is reheated by naked eyes And it is milky white.Herein, the test film of 15mm × 15mm × 30mm is put into be put into electric furnace on spill refractory body and is heated to Relation reheating temperature, keeps 30 minutes afterwards at this temperature, is cooled to normal temperature and takes out outside stove, to allow to internally observe, After by relative polishing both surfaces to 10mm thickness, devitrification and milky white is whether there is in the glass specimen for visually observing polishing, so that Confirm to reheat the devitrification and milky white before and after experiment.Now, for being set to relation reheating temperature (Tg+100 DEG C~120 DEG C) When do not produce devitrification and milky white, and when relation reheating temperature is set into the temperature higher than (Tg+100 DEG C~120 DEG C) Devitrification and milky white glass are not produced, " experiment will be reheated " and be considered as " without devitrification ".In addition, for (Tg+100 DEG C~120 DEG C) in the range of produce devitrification and milky white glass when relation reheating temperature is set into specified temp, " experiment will be reheated " and be considered as " having devitrification ".

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

Table 13

Table 14

Table 15

Table 16

Table 17

As these are shown in Table, in the optical glass of the embodiment of the present invention, partial dispersion ratio (θ g, F) and Abbe number (ν D), (- 0.00256 × ν is metd+0.637)≦(θg,F)≦(-0.00256×νd+ 0.689) relation, more specifically meets (-0.00256×νd+0.657)≦(θg,F)≦(-0.00256×νd+ 0.677) relation.That is, the implementation of the application The partial dispersion ratio (θ g, F) of the glass of example and Abbe number (νd) relation, as shown in Figure 2.

The optical glass of embodiments of the invention, refractive index (nd) more than 1.65, more specifically 1.67 with On, and the refractive index (nd) below 1.90, more specifically below 1.80, in required scope.

In addition, the optical glass of embodiments of the invention, Abbe number (νd) more than 28, more specifically 30 with On, and the Abbe number (νd) below 45, more specifically below 39, in required scope.

In addition, the optical glass of embodiments of the invention, λ80(wavelength during transmissivity 80%) in below 450nm, more Specifically in below 420nm.

In addition, the optical glass of embodiments of the invention, λ5(wavelength during transmissivity 5%) in below 365nm, more Say it is in below 355nm body.

Therefore, it can clear and definite embodiments of the invention optical glass is high for the transmissivity of visible ray and not easy coloring.

In addition, the optical glass of embodiments of the invention, liquidus temperature below 1200 DEG C, more specifically 1110 Below DEG C.

In addition, the optical glass of embodiments of the invention, reheats the evaluation result tested and is " without devitrification ".Therefore, The optical glass of embodiments of the invention, due to being difficult to because reheating generation devitrification or milky white, it is possible to deduce its tool There is the compressing property of reheating higher.

Additionally, using the optical glass of embodiments of the invention, forming glass blocks, the glass blocks is ground and thrown Light, and it is processed into the shape of lens and prism.As a result, the shape of various lens and prism can be stably processed into Shape.

More than, the present invention is illustrated for the purpose of example, 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 (13)

1. a kind of optical glass, it is characterised in that calculated with the quality % of oxide conversion composition,
Contain SiO2Composition 15.0~50.0%,
Nb2O5Composition 20.0~50.0%.
2. optical glass according to claim 1, it is characterised in that calculate SiO by quality ratio2/Rn2O is less than 4.0, its In, Rn is more than a kind selected from the group being made up of Li, Na, K.
3. optical glass according to claim 1 and 2, it is characterised in that calculated with the quality % of oxide conversion composition,
ZnO component is 0~25.0%,
ZrO2Composition is 0~25.0%.
4. the optical glass according to any one of claims 1 to 3, it is characterised in that with oxide conversion composition Quality % is calculated,
B2O3The content of composition is less than 20.0%.
5. the optical glass according to any one of Claims 1-4, it is characterised in that with oxide conversion composition Quality % is calculated,
TiO2Composition be 0~15.0%,
WO3Composition be 0~10.0%,
MgO compositions be 0~10.0%,
CaO compositions be 0~10.0%,
SrO compositions be 0~10.0%,
BaO compositions be 0~10.0%,
La2O3Composition be 0~10.0%,
Gd2O3Composition be 0~10.0%,
Y2O3Composition be 0~10.0%,
Yb2O3Composition be 0~10.0%,
Li2O compositions be 0~20.0%,
Na2O compositions be 0~20.0%,
K2O compositions be 0~10.0%,
Ta2O5Composition be 0~10.0%,
P2O5Composition be 0~10.0%,
GeO2Composition be 0~10.0%,
Al2O3Composition be 0~10.0%,
Ga2O3Composition be 0~10.0%,
Bi2O3Composition be 0~10.0%,
TeO2Composition be 0~5.0%,
SnO2Composition be 0~1.0%,
Sb2O3Composition is 0~1.0%.
6. the optical glass according to any one of claim 1 to 5, it is characterised in that with the matter of oxide benchmark Amount % is calculated,
Ln2O3The quality sum of composition is 0~15.0%, wherein, Ln is a kind selected from the group being made up of La, Gd, Y, Yb More than.
Rn2The quality sum of O compositions is 0~30.0%, wherein, Rn be selected from the group being made up of Li, Na, K it is a kind of with On.
The quality sum of RO compositions be 0~20.0%, R be from the group being made up of Mg, Ca, Sr, Ba select more than one.
7. the optical glass according to any one of claim 1 to 6, it is characterised in that partial dispersion ratio (θ g, F) with Abbe number (νd) between, meet (- 0.00256 × νd+0.637)≦(θg,F)≦(-0.00256×νd+ 0.689) relation.
8. the optical glass according to any one of claim 1 to 7, it is characterised in that before experiment (A) is reheated Do not produce devitrification and milky white afterwards,
The reheating tests (A):Test film 15mm × 15mm × 30mm is reheated, made in 150 minutes its from Room temperature to the transition temperature (Tg) than each sample it is high 100 DEG C~120 DEG C of temperature, in the glass than the optical glass Change transition temperature (Tg) it is high 100 DEG C~120 DEG C at a temperature of be incubated 30 minutes, it is naturally cooled to normal temperature, pair with examination Test after two relative faces of piece are polished thickness 10mm and visually observed.
9. the optical glass according to any one of claim 1 to 8, it is characterised in that refractive index (nd) for 1.65~ 1.80, Abbe number (νd) it is 28~45.
10. the optical glass according to any one of claim 1 to 9, it is characterised in that spectral-transmission favtor is expressed as 80% wavelength (λ80) in below 450nm, spectral-transmission favtor is expressed as 5% wavelength (λ5) in below 365nm.
11. a kind of optical elements, it is characterised in that the optical glass described in any one of claim 1 to 10 is constituted.
The prefabricated component of a kind of 12. polishing use and/or precise punch forming, it is characterised in that by claim 1 to Optical glass described in 10 any one is constituted.
A kind of 13. optical instruments, it possesses the optical element described in claim 11 or 12.
CN201611110415.XA 2015-12-07 2016-12-06 A kind of optical glass, prefabricated component and optical element CN106830677A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106915901A (en) * 2015-12-25 2017-07-04 株式会社小原 A kind of optical glass, prefabricated component and optical element
CN107445472A (en) * 2017-09-11 2017-12-08 成都随如科技有限公司 A kind of optical glass suitable for compression molding

Citations (5)

* Cited by examiner, † Cited by third party
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
CN1990405A (en) * 2005-12-23 2007-07-04 肖特股份有限公司 Optical glass
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
CN106927674A (en) * 2015-11-11 2017-07-07 株式会社小原 A kind of optical glass, prefabricated component and optical element

Patent Citations (5)

* 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
CN1990405A (en) * 2005-12-23 2007-07-04 肖特股份有限公司 Optical glass
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
CN106927674A (en) * 2015-11-11 2017-07-07 株式会社小原 A kind of optical glass, prefabricated component and optical element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106915901A (en) * 2015-12-25 2017-07-04 株式会社小原 A kind of optical glass, prefabricated component and optical element
CN107445472A (en) * 2017-09-11 2017-12-08 成都随如科技有限公司 A kind of optical glass suitable for compression molding

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