CN110183105A - Optical glass and preparation method thereof and optical element - Google Patents
Optical glass and preparation method thereof and optical element Download PDFInfo
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- CN110183105A CN110183105A CN201910512501.0A CN201910512501A CN110183105A CN 110183105 A CN110183105 A CN 110183105A CN 201910512501 A CN201910512501 A CN 201910512501A CN 110183105 A CN110183105 A CN 110183105A
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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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
- C03C3/155—Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium
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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
- C03C4/00—Compositions for glass with special properties
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- 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
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Abstract
The present invention provides a kind of optical glass and preparation method thereof and optical element.The optical glass is contained in terms of mole %: B2O3: 50.1%~65.0%；La2O3: 15.0%~30.0%；Nb2O5: 1%~8%；Y2O3: 3%~8%；ZnO:0.01%~8%；Gd2O3: 0%~8%；TiO2: 0%~5%；ZrO2: 0%~10%；WO3: 0%~2%；The refractive index n of the optical glassdIt is 1.85 or more, Abbe number υdIt is 39~42；The optical glass is free of Ta2O5.The through performance of optical glass of the invention is good, excellent in stability, and water resistance, devitrification resistance are excellent, is a kind of high-refraction low-dispersion optical glass for mold with anomalous dispersion, and processing performance is excellent.
Description
Technical field
The present invention relates to a kind of optical glass and preparation method thereof and optical elements, belong to optical glass technical field.
Background technique
In recent years, with the rapid progress and development of photoelectric technology, various optical devices for example digital camera, video camera,
The digitlization of projector, projection TV etc., high-definition degree are higher and higher.Especially high-end smartphones have been equipped with height
The taking pictures of pixel, camera function, but figure is frivolous small and exquisite, meets people and takes high definition photo and recording small video and friend conveniently
The demand that friend shares, market sales volume cumulative year after year.These optical articles are to light such as lens, prisms used in reduction optical system
Number, the weight for learning element, make optical system overall lighting and miniaturization, while the requirement day for reducing price of complete machine tends to become strong
It is strong.There is 1.85 or more refractive index (n in the present inventiond), 39 or more 42 Abbe number (ν belowd) optical glass have it is multi-party
The excellent performance in face can meet the market demands of optical system development well.
Optical glass disclosed in patent application CN103570242A, ndFor 1.83~1.88, νdIt is 39~42, wherein with base
It is counted in the quality % of oxide, contains 3%~17% Ta2O5, 6.1%~20% WO3, Ta2O5Belong to expensive terres rares
Oxide causes the cost of Optical Glass Materials to increase considerably, WO3Excessive introduce can make glass coloration, make degree of staining and
Through performance is deteriorated.
Optical glass disclosed in patent application CN101935164A, the total matter of glass relative to oxide conversion composition
Amount, in terms of quality %, contains 5.0~35.0% B2O3Ingredient, 15.0~50.0% La2O3Ingredient, total 10.0% or less
Rn2O ingredient and 1.0~25.0% WO3Ingredient, Rn2Rn in O ingredient is selected from one or more of Li, Na, K.It should
The n of optical glassdFor 1.80~1.92, νdIt is 30~45, but the λ 80 of the glass is 500nm hereinafter, under the transmission of short-wave band
Drop.
Optical glass disclosed in patent application CN104803600A, ndFor 1.83~1.92, νdIt is 36~45, in composition
Gd containing wt%10~40%2O3, 0%~13% Ta2O5, liquidus temperature is 1300 hereinafter, at low cost resistance to obtain
The excellent glass of increased devitrification resistance reduces wherein expensive raw material Ta2O5Dosage, and increase Gd2O3Content, but Gd2O3
It is also the more expensive raw material of price in rare earth, therefore excessive Gd2O3Also it will increase glass cost.
Summary of the invention
Problems to be solved by the invention
In view of the technical problems existing in the prior art, present invention firstly provides a kind of optical glass, light of the invention
Learn the refractive index n of glassd1.85 or more, Abbe number υdIn 39~42 ranges, and through performance is good, and excellent in stability is resistance to
It is aqueous, devitrification resistance is excellent, be a kind of high-refraction low-dispersion optical glass for mold with anomalous dispersion.
Further, the present invention also provides a kind of preparation step is simple, the preparation side of the excellent optical glass of processing performance
Method.
The solution to the problem
The present invention provides a kind of optical glass, and the optical glass is contained in terms of mole %:
B2O3: 50.1%~65.0%；
La2O3: 15.0%~30.0%；
Nb2O5: 1%~8%；
Y2O3: 3%~8%；
ZnO:0.01%~8%；
Gd2O3: 0%~8%；
TiO2: 0%~5%；
ZrO2: 0%~10%；
WO3: 0%~2%；
The refractive index nd of the optical glass is 1.85 or more, and Abbe number υ d is 39~42；
The optical glass is free of Ta2O5。
Optical glass according to the present invention, wherein the B2O3Molar content and La2O3、Gd2O3And Y2O3Mole
The ratio B of the sum of content2O3/∑(La2O3+Gd2O3+Y2O3) it is 1.30~3.50, preferably 1.60~3.20.
Optical glass according to the present invention, wherein the Gd2O3Molar content and La2O3And Y2O3Molar content it
The ratio Gd of sum2O3/∑(La2O3+Y2O3) it is no more than 0.5 preferably not greater than 0.45；And/or
The Gd2O3Molar content and B2O3The ratio between molar content for no more than 0.2, preferably not greater than 0.15.
Optical glass according to the present invention, wherein the molar content and Nb of the ZnO2O5、TiO2、WO3、ZrO2And ZnO
The sum of molar content than ZnO/ ∑ (Nb2O5+TiO2+WO3+ZrO2+ ZnO) it is no more than 0.4 preferably no greater than 0.3.
Optical glass according to the present invention, wherein the optical glass is in terms of mole %: the B2O3Content be 51%
~63%；And/or the La2O3Content be 16%~28%；And/or the Nb2O5Content be 2%~7%；And/or institute
State Y2O3Content be 4%~7%；And/or the content of the ZnO is 2%~7%；And/or the Gd2O3Content be 2%
~7%；And/or the TiO2Content be 1%~4%；And/or the ZrO2Content be 2%~8%；And/or the WO3
Content be 0.3%~1.7%.
Optical glass according to the present invention, wherein the absolute value of the anomalous dispersion of the optical glass | △ Pg,F|≥
0.0030, preferably △ PG, F≤-0.0030。
Optical glass according to the present invention, wherein the liquidus temperature of the optical glass is 1200 DEG C hereinafter, transformation temperature
Degree is 680 DEG C or less.
Optical glass according to the present invention, wherein the wavelength when transmittance with a thickness of the optical glass of 10mm is 70%
λ70For 380nm or less；And/or the density of the optical glass is 4.80g/cm3Below.
The present invention also provides a kind of preparation methods of optical glass according to the present invention comprising proportionally by each component
It weighs, carry out melting after mixing, be then poured or leakage note forms in molding die or direct pressing molding.
The present invention also provides a kind of optical elements comprising optical glass according to the present invention.
The effect of invention
The through performance of optical glass of the invention is good, excellent in stability, and water resistance, devitrification resistance are excellent, is a kind of tool
There is the high-refraction low-dispersion optical glass for mold of anomalous dispersion, processing performance is excellent.
The cost of material of the preparation method of optical glass of the invention is low, and preparation step is simple, and processing performance is excellent, is suitble to
Produce in enormous quantities.
Specific embodiment
It will be detailed below various exemplary embodiments, feature and aspect of the invention.Dedicated word " example herein
Property " mean " being used as example, embodiment or illustrative ".Here as any embodiment illustrated by " exemplary " should not necessarily be construed as
Preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In other example,
Method well known to those skilled in the art, means, equipment and step are not described in detail, in order to highlight master of the invention
Purport.
Such as without Special Statement, unit used in the present invention is SI units, and the number occurred in the present invention
Value, numberical range should all be interpreted as containing the inevitable Systematic Errors of institute in industrial production.
The component of optical glass of the invention is described in detail below, raw material incorporation way use can introduce it
The diversified forms of the compound of respective components content.In as described below, the content of each component is indicated with mole %.Separately
It outside, in the following description, also include the specified value when mentioning specified value or less or specified value or more.
The present invention provides a kind of optical glass, and the optical glass is contained in terms of mole %:
B2O3: 50.1%~65.0%
La2O3: 15.0%~30.0%
Nb2O5: 1%~8%
Y2O3: 3%~8%；
ZnO:0.01%~8%；
Gd2O3: 0%~8%；
TiO2: 0%~5%；
ZrO2: 0%~10%；
WO3: 0%~2%；
The refractive index n of the optical glassdIt is 1.85 or more, preferably ndFor 1.85-1.92, more preferable ndFor 1.85-
1.89, Abbe number υdFor 39-42；
The optical glass is free of Ta2O5.Specifically,
B2O3It is the neccessary composition to form glass network structure, the devitrification resistance property of glass, dissolubility can be efficiently modified and dropped
Low glass state transition temperature.If B2O3Content is higher than 65.0%, and glass refraction is caused to reduce, it is difficult to high required for obtaining
Refractive index；If B2O3Content is lower than 50.1%, then the dissolubility reduction of rare-earth oxide, devitrification resistance property are poor in glass.
Therefore, B2O3Content control between 50.1%~65.0%, between preferably 51.0%~63.0%.
La2O3It is the neccessary composition to form glass, there is the important function for improving glass refraction, reducing dispersion.La2O3
Content be lower than 15.0%, refractive index reduces, and dispersion increases, it is difficult to which this is optical for high-refractivity and low-dispersion required for obtaining
Energy；La2O3Content be higher than 30.0%, devitrification resistance property declines with melting behaviour.Therefore, La2O3Content control exist
Between 15.0%~30.0%, between preferably 16.0~28.0%.
Gd2O3Have the function of improving glass refraction, reduce dispersion, can be used as a certain amount of La2O3Substitute, help
In the chemical stability and devitrification resistance property that improve glass.Gd2O3Content be higher than 8%, crystallization temperature increase, devitrification resistance become
The cost of difference, raw material increases, and density increases.Therefore, Gd2O3Content control between 0-8%, between preferably 2-7%.
Y2O3With improving glass refraction, reducing dispersion, improve the effect of the meltbility and devitrification resistance of glass.Relatively
In La and Gd, Y has smaller atomic radius and closer electron outside nucleus layer structure, has accumulation effect to glass structure,
Suitable Y2O3, the crystallization of glass can be made to be inclined to and become smaller, the meltbility and devitrification resistance of glass are improved.Therefore, Y2O3Content
Control is between 3%~8%, between preferably 4%~7%.
By introducing suitable Y2O3, refractive index is further increased, the stability of glass is improved, reduces crystallization ceiling temperature.
By adjusting La2O3、Gd2O3、Y2O3Introducing ratio can effectively increase the solubility of each oxide in glass, can more hold
The optical constant of required high refractive low dispersive is easily obtained, and reduces the liquidus temperature of glass, reduces the devitrification of glass.But
Gd2O3The prices of raw materials are higher and density is larger, if excessive introduce, will increase the cost and density of glass.In order to obtain the present invention
The optical glass of middle excellent properties, therefore Gd2O3Molar content and La2O3And Y2O3The sum of molar content ratio Gd2O3/∑
(La2O3+Y2O3) it is no more than 0.5 preferably not greater than 0.45.
In addition, can be realized batch steady production, the Gd to keep the crystallization property of glass good2O3Molar content with
B2O3The ratio between molar content may be controlled to no more than 0.2, preferably not greater than 0.15.
In order to introduce the rare earth oxide La of high refractive low dispersive in a larger amount2O3、Gd2O3、Y2O3, make full use of B2O3's
Dissolubility introduces the B of larger proportion2O3, and utilize the appropriate proportioning and B between three2O3With rare earth oxide La2O3、Gd2O3、
Y2O3Between appropriate proportioning, dissolve to maximum rare earth oxide, especially La2O3This rare earth oxide at low cost, from
And achieve the purpose that economically to obtain high refractive low dispersive glass.Therefore the B2O3Molar content and La2O3、Gd2O3And
Y2O3The sum of molar content ratio B2O3/∑(La2O3+Gd2O3+Y2O3) it is 1.30~3.50, preferably 1.60~3.20.
Nb2O5Refractive index and dispersion with raising glass, while there is improvement chemical stability and improve glass devitrification
The effect of performance.Nb2O5Content when being higher than 8%, then glass dispersion increases, and can not obtain required low dispersion；
Nb2O5Content when being lower than 1%, the chemical stability and glass devitrification resistance property of glass reduce.Therefore, Nb2O5Content control
Between 1%~8%, between preferably 2%~7%.
TiO2The refractive index and dispersion of glass can be improved strongly, and can be participated in glass network and be formed, suitable TiO2It can be with
Keep glass more stable, plays the role of improving chemical stability and devitrification resistance property, and reduce the density of glass.But
TiO2Content be higher than 5%, the dispersion of glass can sharply increase, while glass is in the short wavelength region (500nm of visible light wave range
Absorption below) is reinforced, and causes transmitance seriously to reduce, glass coloration is serious.Therefore, TiO2Content be 0%~5%, it is excellent
It is selected as 1%~4%.
ZrO2Have the function of improving the refractive index and dispersion of glass, suitable ZrO2With raising devitrification resistance and change
The effect of kind chemical stability.ZrO2Content be higher than 10% when, increases the transition temperature of glass, melting behaviour decline, make
Production cost greatly increases.Therefore, ZrO2Content be 0%~10%, preferably 2%~8%.
ZnO can improve the devitrification resistance property and chemical stability of glass, and when free oxygen is enough in glass, Zn can be with O
Form tetrahedron [ZnO4] and enter glass structure network, keep the structure of glass more stable.ZnO can effectively increase glass simultaneously
Meltbility, transparency, brightness, and glass transition temperature is promoted to reduce.The content of ZnO be higher than 8% when, can make glass without
Method obtains high refractive index, while chemical stability and devitrification resistance are deteriorated；The content of ZnO be lower than 0.01% when, glass it is steady
It is qualitative to decline.Therefore, the content of ZnO controls between 0.01~8%, between preferably 2~7%.
Devitrification resistance is excellent in order to obtain, chemical stability is excellent, inexpensive high refractive low dispersive glass, the ZnO's
Molar content and Nb2O5、TiO2、WO3、ZrO2And the sum of molar content of ZnO than ZnO/ ∑ (Nb2O5+TiO2+WO3+ZrO2
+ ZnO) it is no more than 0.4 preferably no greater than 0.3.
WO3Have the function of improving the refractive index and dispersion of glass, suitable WO3Chemical stability and resistance to mistake can be improved
Permeability.But WO3Content be higher than 2%, the dispersion of glass can sharply increase, and devitrification resistance is deteriorated, while glass is in visible light
The transmitance of the short wavelength part (500nm or less) of wave band can be reduced seriously, and glass coloration is significant.WO3Content be 0~2%,
Preferably 0.3~1.7%.
In addition, the present invention can also add one of BaO, SrO, CaO, MgO or a variety of in right amount, improve so as to play
The meltbility of glass, the effect for reducing glass transition temperature, improving devitrification resistance.But when BaO, SrO, CaO, MgO are respective
When content is more than 10%, the stability of glass is reduced, refractive index also reduces.It is therefore preferable that making Li2O、Na2O、K2The content of O point
Not Wei 0%~10%, do not contain further preferably.
The present invention can also add Li in right amount2O、Na2O、K2One of O or a variety of improves glass so as to play
Meltbility, the effect for reducing glass transition temperature, improving devitrification resistance.But work as Li2O、Na2O、K2The respective content of O is more than
When 10%, the stability of glass is reduced, refractive index also reduces.It is therefore preferable that making Li2O、Na2O、K2The content of O is respectively 0%~
10%, it does not contain further preferably.
The present invention can also add SiO in right amount2、Al2O3One of or it is a variety of play improve glass thermal stability,
Have the function of improving the viscosity of glass melts, improve mouldability.But when its content is more than 5%, due to showing meltbility, resistance to mistake
The tendency that permeability reduces, therefore preferably make SiO2、Al2O3Content be respectively 0%~5%, do not contain further preferably.Tool
Body, relative to SiO2, B2O3Compare SiO2There is higher dissolubility to rare earth oxide, the present invention does not preferably introduce SiO2。
The present invention can also add in right amount and marginally add Sb2O3、CeO2, deaeration can be played the role of, work as Sb2O3、CeO2
When respective additive amount is more than 1%, the devitrification resistance of glass is reduced, glass easily colours simultaneously, therefore can be further preferred
For without containing.Other clarifying agents used in glass industry can also be introduced simultaneously to take off to play the role of deaeration or by heating up
Bubble.
In the present invention, relative partial dispersion PX, YIt is indicated with the ratio of wavelength X and Y specific refractivity: PX, Y=(nX-nY)/
(nF-nC), P can be used in usual optical designG, FValue, i.e. PG, F=(ng-nF)/(nF-nC), ngIt is g spectral line (435.83nm)
Refractive index, nFIt is the refractive index of F spectral line (486.13nm), nCIt is the refractive index of C spectral line (656.27nm).By the glass of essence annealing
After glass processing, the refractive index of each spectral line, such as the n of the glass are obtained using the method for minimum deviation angle measurementg、nF、nCValue, utilizes PG, F
Formula calculates the P of the glassG, FValue.
Using relative partial dispersion (PG, F) longitudinal axis, Abbe number (υd) it is horizontal axis, do rectangular plots, most optics
The P of glassG, FWith υdIt is on a near linear, this straight line meets Abbe formula, and referred to as optical glass is " normal
Line ".Deviate the farther away glass of this straight line, as abnormal dispersion glass.Using the correction of second order spectrum, i.e., to more than two waves
Long achromatism is at least needed with a kind of glass with anomalous dispersion characteristic.PG, FValue deviates the degree △ P of Abbe formulaG, F
It indicates, then each PG, F- υdPoint deviates from △ P in y direction relative to " normal line "G, FAmount.△PG, FMeasure bigger explanation glass
Glass has outstanding achromatism ability more having anomalous dispersion characteristic bigger.
△PG, FCalculation formula it is as follows:
△PG, F=PG, F- 0.6436+0.001661 υd
Glass of the invention has anomalous dispersion △ PG, FAbsolute value be | △ PG, F| >=0.0030 characteristic, it is preferable that
Anomalous dispersion △ P of the inventionG, F≤ -0.0030, the i.e. present invention are preferably with the optical glass of negative anomalous dispersion.
In addition, the liquidus temperature of the optical glass is 1200 DEG C hereinafter, transition temperature is 680 DEG C or less.With a thickness of
The wavelength X when transmittance of the optical glass of 10mm is 70%70For 380nm or less；And/or the density of the optical glass is
4.80g/cm3Below.
The optical element formed by glass of the invention has in blue light environs, can compensate by other lens
The property of generated color difference.
The present invention provides the optics that optical glass realizes high refractive low dispersive while realizing excellent devitrification resistance property
Characteristic is not preferably artificially introduced Ta2O5、GeO2、Ga2O3、TeO2、Yb2O3Etc. expensive ingredient.It is influenced in view of environment
Factor does not introduce Th, Cd, Pb, As, Hg, F etc. to the harmful element of environment and human body, without containing Tl, Os, Be, Se, Bi etc. yet
Element.Optical glass does not introduce other elements that can be coloured, example in the excellent through performance of short wavelength regions to realize the present invention
Such as: Nd, V, Mo, Cr, Mn, Fe, Co, Ni, Cu, Ag.
The present invention also provides a kind of preparation methods of optical glass according to the present invention comprising by each component according to
Ratio weighs, carries out melting after mixing, is then poured or leakage note forms in molding die or direct pressing molding.
The preparation method of optical glass of the present invention, specifically includes: each component raw material being weighed in proportion, is mixed
Be made batch after even, and manufactured batch put into platinum smelting apparatus, 1300 DEG C~1350 DEG C at a temperature of into
Row melting, stirring, homogenizing, clarification make bubble sufficiently float, then cool the temperature to 1200 DEG C~1230 DEG C and be poured or pass through column
Shape pipeline leakage note in molding die or through being pressed and molded, finally after annealing processing obtain slab glass of the invention or
Optical element blank.
The present invention also provides a kind of optical elements comprising optical glass according to the present invention.Specifically, plate optics glass
Glass, which is cut into after fritter, to carry out mill and repairs, heats, softening, being press-formed, annealing, and makes optical element blank, and to above-mentioned blank
It is ground, ground, being polished, plated film, obtaining optical element, optical element can also be obtained by precision press formation.
Optical glass of the invention can be widely used in camera, video camera, liquid crystal and throw by being processed into optical element
In the optical lens such as shadow machine, telescope, microscope and the lens of optic communication, prism.
Embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and should not be taken as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
It can be with conventional products that are commercially available.
Embodiment 1-20
The each component raw material of embodiment 1-20 is weighed in proportion, batch is made after mixing, and is matched by made of
Close in material investment platinum smelting apparatus, 1300 DEG C at a temperature of carry out melting, stirring, homogenizing, 1350 DEG C at a temperature of into
Row clarification, makes bubble sufficiently float, and then cools the temperature to 1200 DEG C and is cast in molding die and forms, finally after annealing plus
Work obtains slab glass of the invention.
Comparative example 1-5
Comparative example 1-5 is weighed in defined ratio respectively in the corresponding raw material of each component, using with embodiment 1-20 phase
Prepared by same preparation method, obtain the optical glass of comparative example 1-5.
Refractive index n is carried out to gained optical glass according to the test method of GB/T7962.1-2010d, Abbe number υdSurvey
It measures, listed n in tabled、υdFor the data after -25 DEG C of annealing.
The survey of glass transition temperature Tg is carried out to gained optical glass according to the test method of GB/T7962.16-2010
Amount.
Glass sample is put into gradient furnace, 1 hour is kept the temperature respectively at different temperatures, is tried by microscopic glass
Crystallization situation inside sample, so that it is determined that liquidus temperature LT。
The density of gained optical glass is measured according to the test method of GB/T7962.20-2010.
Optical glass shortwave transmitted spectrum characteristic degree of staining (λ70/λ5) indicate.λ70Refer to that glass transmittance reaches 70%
When corresponding wavelength, λ5Refer to that glass transmittance reaches corresponding wavelength when 5%.According to Japanese glass industry association " optics glass
The light of glass degree of staining measuring method " JOGIS02, the glass with a thickness of 10 ± 0.1mm that measurement is ground through parallel opposite are saturating
Cross rate.
According to the test method of JB/T10576-2006 to the water resistance D of gained Optical Glass Chemical Stability TestWIt is surveyed
Examination.
By the refractive index n of optical glass made from embodiment 1-20d, Abbe number υd, glass transition temperature Tg, density p,
Liquidus temperature LT, glass transmittance reach corresponding wavelength X when 70%70、△PG, FDeng being listed in 1~table of table 4, by comparative example
1-5 is listed in Table 5 below through measuring obtained data.
The glass ingredient and performance parameter of 1 embodiment 1-5 of table
The glass ingredient and performance parameter of 2 embodiment 6-10 of table
The glass ingredient and performance parameter of 3 embodiment 11-15 of table
The glass ingredient and performance parameter of 4 embodiment 16-20 of table
Comparative example 1-5
Table 5: the glass ingredient and performance parameter of comparative example 1-5
From 1~table of table 4 as can be seen that the optical glass of 1-20 of the embodiment of the present invention, refractive index nd1.85 or more, Ah
Shellfish number υdIn 39~42 ranges, density is in 4.80g/cm3Hereinafter, anomalous dispersion, that is, △ PG, F≤ -0.0030 meets | △ PG, F|
>=0.0030, glass transmittance reaches corresponding wavelength X when 70%70In 380nm hereinafter, through performance is good, glass transition temperature
Degree is for 680 DEG C hereinafter, LTFor 1200 DEG C hereinafter, devitrification resistance is excellent, the high-refraction low-dispersion optical glass for mold with anomalous dispersion.
As can be seen from Table 5, there is the WO of molar content 6.21% in the glass ingredient of comparative example 13And 25.05%
ZnO leads to glass coloration, λ70For 398nm, while excessive WO3The dispersion of glass is improved with ZnO.
There is the Ta of molar content 10.07% in the glass ingredient of comparative example 22O5With 9.06% Li2O, Ta2O5Price it is high
It is expensive, considerably increase the cost of raw material and melting difficulty, excessive Li2O reduces the stability of glass, becomes crystallization property
Difference, LTIt is 1260 DEG C.
Contain expensive Yb in the glass ingredient of comparative example 32O3, Yb2O3There is absorption peak near infrared band, reduces
The transmitance of glass, the ZrO of molar content 15%2Increase the density and transition temperature of glass.
In the glass ingredient of comparative example 4 containing 24.750% ZnO, ZnO/ ∑ (Nb2O5+TiO2+WO3+ZrO2+ ZnO) be
0.73, it is greater than 0.4, excessive ZnO reduces the refractive index of glass, ndOnly 1.81098, it is unable to get 1.85 or more high foldings
Penetrate rate.
TiO containing molar content 8.45% in the glass ingredient of comparative example 53, lead to glass coloration, λ70For 391nm, together
When anomalous dispersion △ PG, FIt is -0.0014, anomalous dispersion characteristic is poor.
Industrial availability
Optical glass of the invention can be widely used in camera, video camera, liquid crystal and throw by being processed into optical element
In the optical lens such as shadow machine, telescope, microscope and the lens of optic communication, prism.The characteristic of high refractive low dispersive, low-density
Number, the weight that optical element used in optical system can be effectively reduced make optical system overall lighting and miniaturization, excellent
Elegant anomalous dispersion characteristic can effective compensation color difference as caused by other lens, improve image quality, while low cost
Characteristic can meet the requirement for reducing the increasingly strong low price in computer system market.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all of the invention
Made any modifications, equivalent replacements, and improvements etc., should be included in the protection of the claims in the present invention within spirit and principle
Within the scope of.
Claims (10)
1. a kind of optical glass, which is characterized in that the optical glass is contained in terms of mole %:
B2O3: 50.1%~65.0%；
La2O3: 15.0%~30.0%；
Nb2O5: 1%~8%；
Y2O3: 3%~8%；
ZnO:0.01%~8%；
Gd2O3: 0%~8%；
TiO2: 0%~5%；
ZrO2: 0%~10%；
WO3: 0%~2%；
The refractive index n of the optical glassdIt is 1.85 or more, Abbe number υdIt is 39~42；
The optical glass is free of Ta2O5。
2. optical glass according to claim 1, which is characterized in that the B2O3Molar content and La2O3、Gd2O3With
And Y2O3The sum of molar content ratio B2O3/∑(La2O3+Gd2O3+Y2O3) it is 1.30~3.50, preferably 1.60~3.20.
3. optical glass according to claim 1 or 2, which is characterized in that the Gd2O3Molar content and La2O3With
Y2O3The sum of molar content ratio Gd2O3/∑(La2O3+Y2O3) it is no more than 0.5 preferably not greater than 0.45；And/or
The Gd2O3Molar content and B2O3The ratio between molar content for no more than 0.2, preferably not greater than 0.15.
4. optical glass according to claim 1-3, which is characterized in that the molar content and Nb of the ZnO2O5、
TiO2、WO3、ZrO2And the sum of molar content of ZnO than ZnO/ ∑ (Nb2O5+TiO2+WO3+ZrO2+ ZnO) be no more than
0.4, preferably no greater than 0.3.
5. optical glass according to claim 1-4, which is characterized in that the optical glass is in terms of mole %:
The B2O3Content be 51%~63%；And/or the La2O3Content be 16%~28%；And/or the Nb2O5Contain
Amount is 2%~7%；And/or the Y2O3Content be 4%~7%；And/or the content of the ZnO is 2%~7%；And/or
The Gd2O3Content be 2%~7%；And/or the TiO2Content be 1%~4%；And/or the ZrO2Content be
2%~8%；And/or the WO3Content be 0.3%~1.7%.
6. optical glass according to claim 1-5, which is characterized in that the anomalous dispersion of the optical glass
Absolute value | △ PG, F| >=0.0030, preferably △ PG, F≤-0.0030。
7. optical glass according to claim 1-6, which is characterized in that the liquidus temperature of the optical glass
For 1200 DEG C hereinafter, transition temperature is 680 DEG C or less.
8. optical glass according to claim 1-7, which is characterized in that with a thickness of 10mm optical glass it is saturating
Wavelength X when penetrating than being 70%70For 380nm or less；And/or the density of the optical glass is 4.80g/cm3Below.
9. a kind of preparation method of optical glass according to claim 1-8, which is characterized in that including by each group
Divide and proportionally weigh, carry out melting after mixing, is then poured or leakage note forms in molding die or direct pressing
Molding.
10. a kind of optical element comprising optical glass according to claim 1-8.
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| CN111018343A (en) * | 2019-12-30 | 2020-04-17 | 湖北新华光信息材料有限公司 | Optical glass, preparation method thereof and optical component |
| CN111856870A (en) * | 2020-07-28 | 2020-10-30 | 珠海立潮新媒体科技有限公司 | Coated glass curtain wall for projection |
| CN112960903A (en) * | 2021-02-26 | 2021-06-15 | 南通市国光光学玻璃有限公司 | High-refractive-index and low-dispersion optical glass and preparation method and application thereof |
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| CN110183105B (en) | 2022-04-05 |
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