CN110342814A - High-refractive and high-dispersive optical glass - Google Patents

High-refractive and high-dispersive optical glass Download PDF

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Publication number
CN110342814A
CN110342814A CN201910660501.5A CN201910660501A CN110342814A CN 110342814 A CN110342814 A CN 110342814A CN 201910660501 A CN201910660501 A CN 201910660501A CN 110342814 A CN110342814 A CN 110342814A
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China
Prior art keywords
glass
bao
optical glass
refractive
sio
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CN110342814B (en
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孙伟
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CDGM Glass Co Ltd
Chengdu Guangming Optoelectronics Co Ltd
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Chengdu Guangming Optoelectronics Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

Abstract

The present invention provides a kind of high-refractive and high-dispersive optical glass, and the component of the optical glass in terms of weight percentage, contains: SiO2: 25~40%；TiO2: 20~38%；Na2O:3~20%；BaO:3~20%；Nb2O5: 5~20%, wherein SiO2/(BaO+Nb2O5) it is 0.75~3.0.It designs and matches by reasonable component, optical glass of the present invention has lower thermal expansion coefficient and excellent devitrification resistance, meet the needs of photoelectric field while meeting desired refractive index and Abbe number.

Description

High-refractive and high-dispersive optical glass
Technical field
The present invention relates to a kind of optical glass, be 1.73~1.82 more particularly, to a kind of refractive index, Abbe number be 21~ 29 high-refractive and high-dispersive optical glass.
Background technique
In recent years, optical element and optical instrument are quickly grown in terms of digitlization, integrated and High precision, this to More stringent requirements are proposed for optical glass performance in optical instrument and the optical element of equipment.Refractive index be 1.73~ 1.82, the optical glass that Abbe number is 21~29 belongs to high-refractive and high-dispersive optical glass, can be with high refraction and low dispersion optical glass Glass is used cooperatively, therefore application is very extensive.
CN101636359A disclose a kind of refractive index be 1.70~1.89, the optical glass that Abbe number is 20~30, Devitrification resistance is poor, is easy the devitrification in production or hot procedure.Optical glass is bigger than normal due to thermal expansion coefficient, is easy It causes to rupture in process, reduces the yields of glass；The performance for also resulting in its heat shock resistance is also poor.Therefore optimization glass The thermal expansion coefficient and devitrification resistance of glass, the research and development and production to optical glass are most important.
Summary of the invention
Based on the above reasons, excellent technical problem to be solved by the invention is to provide a kind of devitrification resistance and have it is lower The high-refractive and high-dispersive optical glass of thermal expansion coefficient.
The technical proposal for solving the technical problem of the invention is: high-refractive and high-dispersive optical glass, and component is with weight Measuring percentage indicates, contains: SiO2: 25~40%；TiO2: 20~38%；Na2O:3~20%；BaO:3~20%；Nb2O5: 5 ~20%, wherein SiO2/(BaO+Nb2O5) it is 0.75~3.0.
Further, above-mentioned high-refractive and high-dispersive optical glass, component in terms of weight percentage, also contain: K2O:0~10%；And/or B2O3: 0~10%；And/or SrO:0~10%；And/or CaO:0~10%；And/or MgO:0~ 10%；And/or Ln2O3: 0~10%；And/or ZrO2: 0~5%；And/or Li2O:0~5%；And/or Al2O3: 0~5%；With/ Or ZnO:0~5%；And/or Sb2O3: 0~1%, wherein the Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3One of or it is more Kind.
High-refractive and high-dispersive optical glass, component in terms of weight percentage, by SiO2: 25~40%；TiO2: 20~ 38%；Na2O:3~20%；K2O:0~10%；BaO:3~20%；Nb2O5: 5~20%；B2O3: 0~10%；SrO:0~ 10%；CaO:0~10%；MgO:0~10%；Ln2O3: 0~10%；ZrO2: 0~5%；Li2O:0~5%；Al2O3: 0~ 5%；ZnO:0~5%；Sb2O3: 0~1% forms, wherein SiO2/(BaO+Nb2O5) it is 0.75~3.0, wherein the Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3One of or it is a variety of.
Further, above-mentioned high-refractive and high-dispersive optical glass, component in terms of weight percentage, each component content Meet one or more of following 6 kinds of situations:
1)Nb2O5/TiO2It is 0.15~0.9；
2)(K2O+CaO)/BaO is 1.0 or less；
3)B2O3/SiO2It is 0.3 or less；
4)Na2O/Nb2O5It is 0.3~3.0；
5)(ZrO2+ ZnO)/BaO be 0.8 or less；
6) (CaO+MgO+ZnO)/BaO is 0.8 or less.
Further, above-mentioned high-refractive and high-dispersive optical glass, component is in terms of weight percentage, in which: SiO2: 28~38%；And/or TiO2: 22~32%；And/or Na2O:6~18%；And/or BaO:6~18%；And/or Nb2O5: 6~ 17%；And/or K2O:0.5~8%；And/or B2O3: 0~5%；And/or SrO:0~5%；And/or CaO:0~5%；And/or MgO:0~5%；And/or Ln2O3: 0~5%；And/or ZrO2: 0~3%；And/or Li2O:0~4%；And/or Al2O3: 0~ 3%；And/or ZnO:0~3%；And/or Sb2O3: 0~0.5%, wherein the Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3In It is one or more.
Further, above-mentioned high-refractive and high-dispersive optical glass, component in terms of weight percentage, each component content Meet one or more of following 7 kinds of situations:
1)Nb2O5/TiO2It is 0.2~0.7；
2)(K2O+CaO)/BaO is 0.05~0.8；
3)B2O3/SiO2It is 0.2 or less；
4)Na2O/Nb2O5It is 0.5~2.0；
5)(ZrO2+ ZnO)/BaO be 0.5 or less；
6) (CaO+MgO+ZnO)/BaO is 0.5 or less
7)SiO2/(BaO+Nb2O5) it is 0.85~2.5.
Further, above-mentioned high-refractive and high-dispersive optical glass, component is in terms of weight percentage, in which: SiO2: 30~35%；And/or TiO2: 25~30%；And/or Na2O:9~15%；And/or BaO:9~15%；And/or Nb2O5: 8~ 15%；And/or K2O:1~6%；And/or B2O3: 0~3%；And/or SrO:0~3%；And/or CaO:0~3%；And/or MgO:0~3%；And/or Ln2O3: 0~2%；And/or ZrO2: 0~2%；And/or Li2O:0~3%；And/or Al2O3: 0~ 1%；And/or ZnO:0~1%, wherein the Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3One of or it is a variety of.
Further, above-mentioned high-refractive and high-dispersive optical glass, component in terms of weight percentage, each component content Meet one or more of following 7 kinds of situations:
1)Nb2O5/TiO2It is 0.25~0.6；
2)(K2O+CaO)/BaO is 0.1~0.5；
3)B2O3/SiO2It is 0.1 or less；
4)Na2O/Nb2O5It is 0.7~1.3；
5)(ZrO2+ ZnO)/BaO be 0.3 or less；
6) (CaO+MgO+ZnO)/BaO is 0.3 or less
7)SiO2/(BaO+Nb2O5) it is 1.0~2.0.
Further, above-mentioned high-refractive and high-dispersive optical glass does not contain Li in component2O；And/or it does not contain ZrO2；And/or ZnO is not contained；And/or WO is not contained3；And/or B is not contained2O3。
Further, the refractive index nd of above-mentioned high-refractive and high-dispersive optical glass is 1.73~1.82, preferably 1.74 ~1.81, more preferably 1.76~1.80；Abbe number νdIt is 21~29, preferably 22~28, more preferably 23~27.
Further, the acidproof effect stability D of above-mentioned high-refractive and high-dispersive optical glassAMore than 2 classes, preferably 1 class；And/or water-fast effect stability DWMore than 2 classes, preferably 1 class；And/or thermalexpansioncoefficientα-30/70℃It is 95 × 10-7/K Hereinafter, preferably 92 × 10-7/ K is hereinafter, more preferably 90 × 10-7/ K or less；And/or transition temperature TgFor 630 DEG C hereinafter, excellent 625 DEG C are selected as hereinafter, more preferably 620 DEG C or less；And/or Knoop hardness HKIt is 530 × 107Pa or more, preferably 535 × 107Pa or more, more preferably 540 × 107Pa or more.
Gas preform is made of above-mentioned high-refractive and high-dispersive optical glass.
Optical element is made of above-mentioned high-refractive and high-dispersive optical glass or above-mentioned gas preform.
Optical instrument is made of above-mentioned high-refractive and high-dispersive optical glass or above-mentioned optical element.
The beneficial effects of the present invention are: designing and matching by reasonable component, optical glass of the present invention is meeting expectation Refractive index and while Abbe number, there is lower thermal expansion coefficient and excellent devitrification resistance, meet the need of photoelectric field It asks.
Specific embodiment
In the following, the embodiment of high-refractive and high-dispersive optical glass of the invention is described in detail, but the present invention is not It is limited to embodiment disclosed below, change appropriate can be carried out in the range of the object of the invention to be implemented.In addition, about weight Therefore multiple declaratives although there is the case where omitting the description appropriate, but not limit the purport invented.Have in the following contents When high-refractive and high-dispersive optical glass of the present invention is referred to as optical glass or glass.
[optical glass]
The each component range of high-refractive and high-dispersive optical glass of the present invention is illustrated below.In the present specification, such as Fruit does not have specified otherwise, and the content of each component is all using the weight of the glass substance total amount relative to the composition for being converted into oxide Measuring percentage indicates.Herein, described " composition for being converted into oxide " refers to, as optical glass constituent of the invention Raw material and in the case that when melting such as oxide, complex salt and hydroxide for using decomposes and is changed into oxide, by this The substance total amount of oxide is as 100%.
Unless in particular situations it is further noted that numberical range listed herein includes upper and lower bound value, " more than " " following " includes endpoint value, and including all integers and score in the range, and is not limited to limited range when institute The occurrence of column.Herein referred "and/or" is inclusive, such as " A and/or B ", refers to only A, or only B, Huo Zhetong When have A and B.
<necessary component and optional components>
SiO2It is the skeleton of optical glass, generates body as glass network, has and maintain chemical durability of glass, improve glass The effect of glass devitrification resistance.Work as SiO2When content is lower than 25%, it is difficult to reach said effect, therefore SiO2The lower limit of content be 25%, preferred lower limit 28%, more preferable lower limit is 30%；Work as SiO2Content be higher than 40% when, then glass melting reduce, Transition temperature rises, therefore, SiO2Upper content limit be 40%, preferred upper limit 38%, the more preferable upper limit be 35%.
TiO2Have the function of improving glass refraction and dispersion, and glass network can be participated in and formed, appropriate introduce can Keep glass more stable and reduce the viscosity of glass, passes through the TiO of 20% or more introducing in the present invention2It is excellent to obtain said effect Select TiO2Content lower limit be 22%, more preferable lower limit be 25%；But largely introduce TiO2It can make glass visible light region afterwards The tendency towards devitrification of the decrease in transmission of shortwave part, glass increases, therefore, TiO in the present invention2Upper content limit be 38%, it is excellent It chooses and is limited to 32%, the more preferable upper limit is 30%.
Na2O has the function of improving glass melting have apparent effect for improving melted effect, while may be used also The transition temperature of glass is reduced, the Na of 3% or more introducing is led in the present invention2O is to obtain said effect, preferably Na2Under the content of O It is limited to 6%, more preferable lower limit is 9%；Work as Na2O content is more than 20%, and the chemical stability and weatherability of glass reduce, therefore Na2The upper content limit of O is 20%, preferred upper limit 18%, and the more preferable upper limit is 15%.
K2O has the function of improving thermal stability and meltbility, but its content is more than 10%, the devitrification resistance of glass Decline, glass density rises, therefore K in the present invention2The content of O is 10% hereinafter, it is preferred that K2The content of O is 0.5~8%, more excellent It is selected as 1~6%.
Li2O can reduce the transition temperature of glass, but its content height to the acid-resistant stability and thermal expansion coefficient of glass not Benefit, and there is corrosion, therefore, Li for container (such as platinum crucible) is melted2The content of O is preferably 5% hereinafter, more preferably 4% hereinafter, further preferably 3% or less.In some embodiments, even if a small amount of contains Li2O also results in glass Thermal expansion coefficient exceed design requirement, devitrification resistance can reduce, therefore not contain Li still more preferably2O。
MgO can reduce the refractive index and glass melting temperature of glass, but the refractive index of glass is not achieved when MgO is added excessive The devitrification resistance of design requirement, glass can decline with stability, while the cost of glass can rise.Therefore, content of MgO is limited to 0~10%, preferably 0~5%, more preferably 0~3%.
CaO helps to adjust the optical constant of glass, improves the processing performance of glass, but when CaO addition is excessive, can make The optical data for obtaining glass does not reach requirement, and devitrification resistance can deteriorate.Therefore, CaO content be limited to 0~10%, preferably 0~ 5%, more preferably 0~3%, CaO is not introduced further preferably.
SrO is added to the refractive index and Abbe number of adjustable glass in glass, if but additive amount it is excessive, the chemistry of glass Stability can decline, while the cost of glass also can rapid increase.Therefore, SrO content be limited to 0~10%, preferably 0~ 5%, more preferably 0~3%.
BaO is in the present invention the necessary component for adjusting glass refraction, improving glass transmitance and intensity, when its content Act on unobvious when lower than 3%, the content lower limit of preferably BaO is 6%, and the content lower limit of more preferable BaO is 9%；But when it contains Amount can then enable the devitrification resistance of glass and chemical stability be deteriorated more than 20%.Therefore, BaO upper content limit is 20%, preferably The upper limit is 18%, and the more preferable upper limit is 15%.
In certain embodiments of the present invention, by making (K2O+CaO)/BaO is 1.0 hereinafter, glass can be made to be fitted Suitable abrasion degree and hardness improves the acidproof effect stability of glass, preferably (K2O+CaO)/BaO is 0.05~0.8, more preferably (K2O+MgO+CaO)/BaO is 0.1~0.5.
Nb2O5It is high-refraction high-dispersion component, the devitrification resistance of glass can be improved, pass through 5% or more introducing in the present invention Nb2O5To obtain said effect, if Nb2O5Content be more than 20%, the thermal stability and chemical stability of glass reduce, light Learn transmitance decline, therefore Nb in the present invention2O5Content be 5~20%, preferably 6~17%, more preferably 8~15%.
In the present invention, by controlling SiO2/(BaO+Nb2O5) in 0.75~3.0 range, optical glass can be made to have While excellent devitrification resistance and chemical stability, thermal expansion coefficient is minimized, preferably SiO2/(BaO+Nb2O5) be 0.85~ 2.5, more preferable SiO2/(BaO+Nb2O5) 1.0~2.0.
In certain embodiments of the present invention, by by Nb2O5/TiO2Control can be improved in 0.15~0.9 range The optical transmittance of glass and at glass stability, optimizes the chemical stability of glass, preferably Nb2O5/TiO2It is 0.2~0.7, glass Glass is easier to obtain suitable abrasion degree, more preferable Nb2O5/TiO2It is 0.25~0.6.
In certain embodiments of the present invention, if Na2O/Nb2O5Greater than 3.0, the high temperature viscosity of glass is reduced, mouldability It can be deteriorated, if Na2O/Nb2O5Lower than 0.3, the devitrification resistance of glass is reduced.Therefore, Na2O/Nb2O5Range be 0.3~3.0, It is preferred that Na2O/Nb2O5Range be 0.5~2.0, more preferable Na2O/Nb2O5Range be 0.7~1.3.
Al2O3The chemical stability of glass can be improved to a certain extent, but its content is excessive, the devitrification resistance of glass and Meltbility reduces, therefore its content is 5% hereinafter, preferably 3% hereinafter, more preferably 1% or less.
B2O3Have the function of improving glass melting, but when its content is higher than 10%, the chemical stability of glass and resistance to Increased devitrification resistance decline.Therefore, B in the present invention2O3Upper content limit be 10%, preferred upper limit 5%, the more preferable upper limit be 3%.? In some embodiments, by not introducing B2O3, can get desired chemical stability.
In certain embodiments of the present invention, if B2O3/SiO2More than 0.3, the chemical stability and devitrification resistance of glass It reduces, optical transmittance is deteriorated, therefore B2O3/SiO2For 0.3 hereinafter, preferably 0.2 hereinafter, more preferably 0.1 or less.
Ln2O3It is to improve glass refraction, and improve the component of chemical durability of glass, is in optical glass of the present invention Optional components, wherein Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3One of or it is a variety of.By by Ln2O3Content control be 10% or less can be improved the devitrification resistance property of glass, and obtain desired refractive index and Abbe number.Therefore, in light of the invention It learns in glass, Ln2O3The upper limit value of content range is 10%, preferred upper limit 5%, and the more preferable upper limit is 2%.
ZnO is added in system glass of the present invention, and the refractive index and dispersion of adjustable glass reduce the transformation temperature of glass Degree, but when its content is more than 5%, the devitrification resistance of glass can decline, while high temperature viscosity is smaller, difficulty is brought to molding, and Increase the thermal expansion coefficient and thermal refractive index coefficient of glass.Therefore, the present invention in ZnO content be 0~5%, preferably 0~ 3%, more preferably 0~1%, it does not contain further preferably.
In certain embodiments of the present invention, by making (CaO+MgO+ZnO)/BaO 0.8 hereinafter, glass can be made to obtain The abrasion degree and hardness that must be suitable for, improve the water-fast effect stability of glass, preferably (CaO+MgO+ZnO)/BaO be 0.5 hereinafter, More preferably (CaO+MgO+ZnO)/BaO is 0.3 or less.
ZrO2Have the function of improving refractive index, when its content is more, the devitrification resistance of glass declines, ZrO in the present invention2 Content be 5% hereinafter, preferably 3% hereinafter, more preferably 2% hereinafter, not introducing further preferably.
In certain embodiments of the present invention, by by (ZrO2+ ZnO)/BaO control 0.8 hereinafter, being conducive to improve The devitrification resistance of glass optimizes the bubble degree of glass, preferably (ZrO2+ ZnO)/BaO is 0.5 hereinafter, more preferably (ZrO2+ZnO)/ BaO is 0.3 or less.
By the Sb for being added 0~1%2O3、SnO2, SnO and CeO2One of or various ingredients as clarifying agent, can be with The clarifying effect for improving glass, is preferably added to 0~0.5% clarifying agent.But work as Sb2O3When content is more than 1%, glass has clarification The tendency of reduced performance, simultaneously because its strong oxidation promotes the deterioration of molding die, therefore Sb of the present invention2O3Addition Amount is for 1% hereinafter, preferably 0.5% or less.SnO2, SnO can also be used as clarifying agent to add, but when its content is more than 1% When, glass can colour, or when heat, soften glass and carry out die forming etc. shape again when, Sn can become nucleus and generate Starting point, generate the tendency of devitrification, therefore SnO of the invention2With the difference content of SnO be 1% hereinafter, preferably 0.5% with Under, it does not contain further preferably.CeO2Effect and additive amount ratio and SnO2Unanimously, content is 1% hereinafter, preferably 0.5% hereinafter, do not contain further preferably.
In the range of not damaging glass performance of the invention, above-mentioned other groups not referred to can be added as needed Point, such as P2O5、GeO2、TeO2、Bi2O3、Ta2O5And Ga2O3Etc. components, but individually or mixing the content containing the above component on Limit preferably 5%, the more preferable upper limit is 3%, and the further preferred upper limit is 1%, is not contained still more preferably.Of the invention In some embodiments, WO3Introducing will lead to glass devitrification resistance can and degree of staining deteriorate, therefore preferably do not contain WO3。
<component that should not contain>
In glass of the present invention, the oxide of the transition metal such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo, even if individually Or in the case that compound ground contains on a small quantity, glass is also subject to coloration, the specific wavelength in visible light region generates absorption, thus The property for weakening raising visible light transmittance effect of the invention, therefore it is desirable, especially for the transmitance of visible light region wavelength The optical glass required, does not preferably contain actually.
The oxide of Th, Cd, Tl, Os, Be and Se have what control used to incline as harmful chemical substance in recent years To being to the measure of environmental protection in the manufacturing process of glass, the disposition after manufacturing procedure and commercialization not only must It needs.Therefore, it in the case where paying attention to the influence to environment, other than being inevitably mixed into, does not preferably contain actually They.Optical glass becomes the substance for not including pollution environment actually as a result,.Therefore, even if not taking special environment pair Measure in plan, optical glass of the invention are also able to carry out manufacture, processing and discard.
Environmental-friendly in order to realize, optical glass of the invention does not contain As2O3And PbO.Although As2O3With elimination gas Bubble and the effect for preferably preventing glass coloration, but As2O3Addition can increase glass smelting furnace is especially to the platinum of platinum smelting furnace Gold corrodes, and causes more platinum ions to enter glass, adversely affects to the service life of platinum smelting furnace.
" not introducing " " not containing " " 0% " described herein refers to not deliberately by the compound, molecule or element etc. It is added in optical glass of the present invention as raw material；But as the raw material and/or equipment of production optical glass, can exist certain It is not the impurity deliberately added or component, a small amount of or trace can contains in final optical glass, such situation is also in this hair In the protection scope of bright patent.
In the following, being illustrated to the performance of optical glass of the invention.
<refractive index and Abbe number>
The refractive index (nd) and Abbe number (ν of optical glassd) tested according to method as defined in GB/T 7962.1-2010.
The refractive index (nd) of optical glass of the present invention is 1.73~1.82, preferably 1.74~1.81, more preferably 1.76 ~1.80；Abbe number (νd) it is 21~29, preferably 22~28, more preferably 23~27.
<acidproof effect stability>
The acidproof effect stability (D of optical glassA) (powder method) according to method as defined in GB/T 17129 test.
The acidproof effect stability (D of optical glass of the present inventionA) it is 2 classes or more, preferably 1 class.
<water-fast effect stability>
The water-fast effect stability (D of optical glassW) (powder method) according to method as defined in GB/T 17129 test.
The water-fast effect stability (D of optical glass of the present inventionW) it is 2 classes or more, preferably 1 class.
<density>
The density (ρ) of optical glass is tested by method as defined in GB/T7962.20-2010.
The density (ρ) of optical glass of the present invention is 3.5g/cm3Hereinafter, preferably 3.4g/cm3Hereinafter, more preferable 3.3g/ cm3Below.
<thermal expansion coefficient>
Thermal expansion coefficient (the α of optical glass-30/70℃) carry out testing -30 according to method as defined in GB/T7962.16-2010 ~70 DEG C of data.
Thermal expansion coefficient (the α of optical glass of the invention-30/70℃) it is 95 × 10-7/ K is hereinafter, preferably 92 × 10-7/K Hereinafter, more preferably 90 × 10-7/ K or less.
<transition temperature>
Transition temperature (the T of optical glassg) tested by method as defined in GB/T7962.16-2010.
Transition temperature (the T of optical glass of the present inventiong) be 630 DEG C hereinafter, preferably 625 DEG C hereinafter, more preferably 620 DEG C Below.
<Knoop hardness>
Knoop hardness (the H of optical glassK) tested by test method as defined in GB/T7962.18-2010.
Knoop hardness (the H of optical glass of the present inventionK) it is 530 × 107Pa or more, preferably 535 × 107Pa or more, it is more excellent It is selected as 540 × 107Pa or more.
<bubble degree>
The bubble degree of optical glass is by the test of method as defined in GB/T7962.8-2010.
The bubble degree of optical glass of the present invention is B grades or more, preferably A grades or more, more preferably A0Grade or more.
[manufacturing method]
The manufacturing method of optical glass of the present invention is as follows: glass of the invention is produced using conventional raw material and common process, It the use of carbonate, nitrate, sulfate, hydroxide, oxide etc. is raw material, according to a conventional method after ingredient, the furnace that will prepare Material is put into 1100~1300 DEG C of smelting furnace and is melted, and after clarified, stirring and homogenizing, obtains no bubble and be free of The homogeneous melt glass of undissolved substance casting mold and anneals this melten glass in mold.Those skilled in the art's energy Enough according to actual needs, raw material, process and technological parameter are properly selected.
[gas preform and optical element]
Molded such as the means of attrition process or reheating, compression molding precise punch forming means can be used, Gas preform is made by made optical glass.I.e., it is possible to mechanical by being ground and being ground to optical glass etc. Processing makes gas preform, or by the preform for making compression molding by optical glass, to the preform Carry out carrying out attrition process again after reheating is molded to make gas preform, or and to attrition process is carried out it is manufactured pre- Precise punch forming is carried out at parison to make gas preform.
It should be noted that the means for preparing gas preform are not limited to above-mentioned means.As described above, optics of the invention Glass is useful for various optical elements and optical design, wherein particularly preferably by optical glass of the invention formed it is pre- at Parison carries out molded, precise punch forming of reheating etc., the optical elements such as production lens, prism using the preform.
Gas preform and optical element of the invention is formed by the optical glass of aforementioned present invention.Glass of the invention Prefabricated component has excellent characteristics possessed by optical glass；Optical element of the invention has excellent spy possessed by optical glass Property, it is capable of providing the optical elements such as the costly various lens of optics, prism.
As the example of lens, can enumerate lens face be spherical surface or aspherical recessed meniscus shaped lens, male bend moon-shaped lens, The various lens such as biconvex lens, biconcave lens, plano-convex lens, plano-concave lens.
[optical instrument]
Optical glass of the present invention is formed by optical element and can make such as camera installation, picture pick-up device, display equipment and prison Control the optical instruments such as equipment.
Embodiment
<optical glass embodiment>
In order to further clearly illustrate and illustrate technical solution of the present invention, non-limiting embodiment below is provided.
The present embodiment obtains the optics glass with composition shown in 1~table of table 2 using the manufacturing method of above-mentioned optical glass Glass.In addition, the test method measures the characteristic of each glass through the invention, and measurement result is indicated in 1~table of table 2 In.
Table 1
Table 2
<gas preform embodiment>
The means of the obtained glass of optical glass Examples 1 to 20 use such as attrition process or reheating are molded, The means of the compression moldings such as precise punch forming, it is saturating to make recessed meniscus shaped lens, male bend moon-shaped lens, biconvex lens, concave-concave The prefabricated component of the various lens such as mirror, plano-convex lens, plano-concave lens, prism etc..
<optical element embodiment>
By obtained these prefabricated components annealing of above-mentioned gas preform embodiment, the same of the deformation of inside glass is being reduced When be finely adjusted so that the optical characteristics such as refractive index reach desirable value.
Then, each prefabricated component is ground, ground, make recessed meniscus shaped lens, male bend moon-shaped lens, biconvex lens, The various lens such as biconcave lens, plano-convex lens, plano-concave lens, prism.It can also Tu Bufang on the surface of obtained optical element Reflectance coating.
<optical instrument embodiment>
By optical element made from above-mentioned optical element embodiment by optical design, by using one or more optics Element forms optical component or optical module, can be used for such as imaging device, sensor, microscope, medical science, number and throws Shadow, communication, optical communication technique/information transmission, optics/illumination in automotive field, photoetching technique, excimer laser, crystalline substance Piece, computer chip and integrated circuit and electronic device including such circuit and chip, or taking the photograph for automotive field As equipment and device.

Claims (14)

1. high-refractive and high-dispersive optical glass, which is characterized in that its component in terms of weight percentage, contains: SiO2: 25~ 40%；TiO2: 20~38%；Na2O:3~20%；BaO:3~20%；Nb2O5: 5~20%, wherein SiO2/(BaO+Nb2O5) It is 0.75~3.0.
2. high-refractive and high-dispersive optical glass as described in claim 1, which is characterized in that its component is with weight percent table Show, also contain: K2O:0~10%；And/or B2O3: 0~10%；And/or SrO:0~10%；And/or CaO:0~10%；With/ Or MgO:0~10%；And/or Ln2O3: 0~10%；And/or ZrO2: 0~5%；And/or Li2O:0~5%；And/or Al2O3: 0 ~5%；And/or ZnO:0~5%；And/or Sb2O3: 0~1%, wherein the Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3In It is one or more.
3. high-refractive and high-dispersive optical glass, which is characterized in that its component in terms of weight percentage, by SiO2: 25~40%； TiO2: 20~38%；Na2O:3~20%；K2O:0~10%；BaO:3~20%；Nb2O5: 5~20%；B2O3: 0~10%； SrO:0~10%；CaO:0~10%；MgO:0~10%；Ln2O3: 0~10%；ZrO2: 0~5%；Li2O:0~5%； Al2O3: 0~5%；ZnO:0~5%；Sb2O3: 0~1% forms, wherein SiO2/(BaO+Nb2O5) it is 0.75~3.0, wherein institute State Ln2O3For La2O3、Gd2O3、Y2O3、Yb2O3One of or it is a variety of.
4. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that its component In terms of weight percentage, each component content meets one or more of following 6 kinds of situations:
1)Nb2O5/TiO2It is 0.15~0.9；
2)(K2O+CaO)/BaO is 1.0 or less；
3)B2O3/SiO2It is 0.3 or less；
4)Na2O/Nb2O5It is 0.3~3.0；
5)(ZrO2+ ZnO)/BaO be 0.8 or less；
6) (CaO+MgO+ZnO)/BaO is 0.8 or less.
5. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that its component In terms of weight percentage, in which: SiO2: 28~38%；And/or TiO2: 22~32%；And/or Na2O:6~18%；And/or BaO:6~18%；And/or Nb2O5: 6~17%；And/or K2O:0.5~8%；And/or B2O3: 0~5%；And/or SrO:0~ 5%；And/or CaO:0~5%；And/or MgO:0~5%；And/or Ln2O3: 0~5%；And/or ZrO2: 0~3%；And/or Li2O:0~4%；And/or Al2O3: 0~3%；And/or ZnO:0~3%；And/or Sb2O3: 0~0.5%, wherein the Ln2O3 For La2O3、Gd2O3、Y2O3、Yb2O3One of or it is a variety of.
6. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that its component In terms of weight percentage, each component content meets one or more of following 7 kinds of situations:
1)Nb2O5/TiO2It is 0.2~0.7；
2)(K2O+CaO)/BaO is 0.05~0.8；
3)B2O3/SiO2It is 0.2 or less；
4)Na2O/Nb2O5It is 0.5~2.0；
5)(ZrO2+ ZnO)/BaO be 0.5 or less；
6) (CaO+MgO+ZnO)/BaO is 0.5 or less
7)SiO2/(BaO+Nb2O5) it is 0.85~2.5.
7. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that its component In terms of weight percentage, in which: SiO2: 30~35%；And/or TiO2: 25~30%；And/or Na2O:9~15%；And/or BaO:9~15%；And/or Nb2O5: 8~15%；And/or K2O:1~6%；And/or B2O3: 0~3%；And/or SrO:0~ 3%；And/or CaO:0~3%；And/or MgO:0~3%；And/or Ln2O3: 0~2%；And/or ZrO2: 0~2%；And/or Li2O:0~3%；And/or Al2O3: 0~1%；And/or ZnO:0~1%, wherein the Ln2O3For La2O3、Gd2O3、Y2O3、 Yb2O3One of or it is a variety of.
8. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that its component In terms of weight percentage, each component content meets one or more of following 7 kinds of situations:
1)Nb2O5/TiO2It is 0.25~0.6；
2)(K2O+CaO)/BaO is 0.1~0.5；
3)B2O3/SiO2It is 0.1 or less；
4)Na2O/Nb2O5It is 0.7~1.3；
5)(ZrO2+ ZnO)/BaO be 0.3 or less；
6) (CaO+MgO+ZnO)/BaO is 0.3 or less
7)SiO2/(BaO+Nb2O5) it is 1.0~2.0.
9. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that its component In do not contain Li2O；And/or ZrO is not contained2；And/or ZnO is not contained；And/or WO is not contained3；And/or B is not contained2O3。
10. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that the light The refractive index nd for learning glass is 1.73~1.82, preferably 1.74~1.81, more preferably 1.76~1.80；Abbe number νdIt is 21 ~29, preferably 22~28, more preferably 23~27.
11. the high-refractive and high-dispersive optical glass as described in claims 1 to 3 any claim, which is characterized in that the light Learn the acidproof effect stability D of glassAMore than 2 classes, preferably 1 class；And/or water-fast effect stability DWIt is excellent more than 2 classes It is selected as 1 class；And/or thermalexpansioncoefficientα-30/70℃It is 95 × 10-7/ K is hereinafter, preferably 92 × 10-7/ K is hereinafter, more preferably 90 ×10-7/ K or less；And/or transition temperature TgFor 630 DEG C hereinafter, preferably 625 DEG C hereinafter, more preferably 620 DEG C or less；With/ Or Knoop hardness HKIt is 530 × 107Pa or more, preferably 535 × 107Pa or more, more preferably 540 × 107Pa or more.
12. gas preform, using high-refractive and high-dispersive optical glass system described in claim 1~11 any claim At.
13. optical element, using high-refractive and high-dispersive optical glass described in claim 1~11 any claim or right It is required that gas preform described in 12 is made.
14. optical instrument, using high-refractive and high-dispersive optical glass described in claim 1~11 any claim or right It is required that optical element described in 13 is made.
CN201910660501.5A 2019-07-22 2019-07-22 High-refraction high-dispersion optical glass Active CN110342814B (en)

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CN110937802A (en) * 2019-12-30 2020-03-31 成都光明光电股份有限公司 Optical glass
CN111574049A (en) * 2020-05-27 2020-08-25 成都光明光电股份有限公司 Glass composition
CN113582537A (en) * 2021-09-07 2021-11-02 成都光明光电股份有限公司 High-refraction high-dispersion optical glass
CN113603357A (en) * 2020-05-04 2021-11-05 肖特股份有限公司 Low-density optical glass
CN113735436A (en) * 2021-09-07 2021-12-03 成都光明光电股份有限公司 Optical glass, glass preform, optical element and optical instrument
CN115010363A (en) * 2022-06-01 2022-09-06 河北光兴半导体技术有限公司 High-refractive-index glass composition, high-refractive-index glass, and preparation method and application thereof
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CN115010363A (en) * 2022-06-01 2022-09-06 河北光兴半导体技术有限公司 High-refractive-index glass composition, high-refractive-index glass, and preparation method and application thereof

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