CN107628749A - Fluorophosphate optical glass and preparation method thereof and optical element - Google Patents
Fluorophosphate optical glass and preparation method thereof and optical element Download PDFInfo
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Abstract
The present invention relates to a kind of fluorophosphate optical glass and preparation method thereof and optical element.The fluorophosphate optical glass includes the following components in terms of compound：P2O5：19~30%, AlF3：11~18%, Al2O3：1~6%, BaO：46~62%, SrO：1~6%, Na3AlF6：1~8%, SnF4：0.1~3%, B2O3：0~2%, Sb2O3：0.01~0.3%, above ingredient weight is more than 99%, and above-mentioned percentage is weight percentage.The refractive index nd of the fluorophosphate optical glass of the present invention is 1.56~1.62, and Abbe number υ d are 67~71, have good chemical stability, transmitance, degree of staining；Its proportion is relatively low, alleviates the weight of glass elements and optical system；With excellent achromatism energy, the image quality of optical system can be improved；Recrystallization temperature is relatively low simultaneously, makes it easier to realize batch production.
Description
Technical field
The present invention relates to a kind of fluorophosphate optical glass and preparation method thereof and optical element, belongs to optical glass neck
Domain.
Background technology
Low-refraction, the glass material of low dispersion have the characteristic small dependent on the variations in refractive index (scattering) of optical wavelength,
Therefore its type part is suitable for the optical instrument of high-precision aberration.In the past, use crystalline material CaF2, but due to large-sized
CaF2Crystal production difficulty is larger, and with it is more difficult to process the drawbacks of, so now with same characteristic but chemistry it is steady
The qualitative fluorphosphate glass better than crystalline material substitutes its trend.
Fluorphosphate glass is a kind of optical material for combining fluoride glass and phosphate glass advantage, most prominent
The characteristics of be the optical property that its large-scale composition adjustability is brought adjustability.It has extra-low refractive index, ED
Higher special relative partial dispersion value, there is superior achromatism energy, particularly long-focus apochromatic leanse is come
Say component material that is even more indispensable, therefore having turned into indispensable in related optical design.In addition, it is still very
Good saturating ultraviolet optical material, can be as oxide glass and the substitute of fluorine crystal.
The light that refractive index nd is more than 1.50, Abbe number υ d are more than 65 is disclosed in patent application CN104276759A
Learn glass.But the glass disclosed in it contains 14.0~24.0% Ca2+, the Ca in such glass2+Part substitutes Ba2+Although
Advantageously reduce product proportion, but Ca2+Excessive introducing the chemical stability of glass can be made to be deteriorated, while Ca2+Excessive draw
The abrasion degree reduction for entering to also result in glass is restricted.
Patent application CN101891385A disclose refractive index nd between 1.54~1.62, Abbe number υ d are 65~70
Between optical glass.But it contains 40~65% P2O5, 1~20% B2O3With 6~38% CaO.Excessively introduce
P2O5So that glass is not easy to reach expected optical property, B is largely introduced2O3The chemical stability of glass can be then set to be deteriorated.And
And each component is all difficult to nd, υ d matching relationship by the way of oxide form introducing in CN101891385A.
Patent application CN1854100A disclose a kind of refractive index between 1.4~1.58, Abbe number υ d 67~90 it
Between fluorphosphate glass.But it contains as 1~30% Li that must contain component2+Although Li2O compositions advantageously reduce production
Product proportion and transition temperature Tg, but it has degradating trend to chemical stability, CN1854100A technical scheme is difficult to reality
Existing expected DACorrode ratio.
Patent application CN103332859A discloses the optical glass that a kind of Abbe number is more than or equal to 66, patent application
CN101196571A discloses the optical glass that a kind of refractive index is between 1.54~1.60, Abbe number υ d are between 65~78.
But both product costs are high, and it is unfavorable for adjusting nd, υ d matchings and is unfavorable for eliminating bubble.
The content of the invention
Problems to be solved by the invention
It is an object of the invention to provide a kind of fluorophosphate optical glass and preparation method thereof and optical element.It is described
The refractive index nd of fluorophosphate optical glass is 1.56~1.62, and Abbe number υ d are 67~71, have good chemical stability
With high visible light transmissivity, and the glass melting temperature that can eliminate existing optical glass is high, volatilization striped is rambunctious lacks
Fall into, while can also realize and stably produce.
The solution used to solve the problem
The present invention provides a kind of fluorophosphate optical glass, it is characterised in that including the following components in terms of compound：
P2O5：19~30%, preferably 24~29%；
AlF3：11~18%, preferably 12~16%；
Al2O3：1~6%, preferably 1~4%；
BaO：46~62%, preferably 49~59%；
SrO：1~6%, preferably 1~5%；
Na3AlF6：1~8%, preferably 2~6%；
SnF4：0.1~3%, preferably 0.1~2%；
B2O3：0~2%, preferably 0~1.5%；
Sb2O3：0.01~0.3%, preferably 0.01~0.2%；
Above ingredient weight is more than 99%；
Above-mentioned percentage is weight percentage.
According to the fluorophosphate optical glass of the present invention, the refractive index nd of the fluorophosphate optical glass for 1.56~
1.62, Abbe number υ d are 67~71.
According to the fluorophosphate optical glass of the present invention, the degree of staining λ of the fluorophosphate optical glass80/λ5In λ80
Below 370, λ5Below 310.
According to the fluorophosphate optical glass of the present invention, the recrystallization temperature Lt of the fluorophosphate optical glass is less than etc.
In 950 DEG C, devitrification resistance Tg/Lt is more than 0.610.
According to the fluorophosphate optical glass of the present invention, when the thickness of the fluorophosphate optical glass is 10mm, wavelength
Inside transmitance in 700nm be more than or equal to 99.7%, inside transmitance of the wavelength in 400nm be more than or equal to
98.0%, inside transmitance of the wavelength in 350nm is more than or equal to 70.0%.
According to the fluorophosphate optical glass of the present invention, the proportion of the fluorophosphate optical glass is in 4.20g/cm3With
Under.
According to the fluorophosphate optical glass of the present invention, the water resistance D of the fluorophosphate optical glasswIt is acidproof for 1 grade
Property DAFor 2 grades or 3 grades, DACorrode than being less than or equal to 0.50%.
According to the fluorophosphate optical glass of the present invention, the abrasion degree Fa of the fluorophosphate optical glass is less than or equal to
390。
The present invention also provides a kind of preparation method of the fluorophosphate optical glass according to the present invention, including：By each component
Proportionally weigh, it is well mixed after carry out melting, then pour into a mould or leak note in mould, or direct pressing shaping.
The present invention also provides a kind of optical element, and it includes the fluorophosphate optical glass according to the present invention.
The effect of invention
The new fluorphosphate glass of the present invention, the inside transmitance in visible-range is sufficiently high, and wavelength exists
Inside transmitance during 700nm is more than or equal to 99.7%, and inside transmitance of the wavelength in 400nm is more than or equal to 98%, wavelength
Inside transmitance in 350nm is more than or equal to 70%.
Also, not only cost is low for the fluorphosphate glass of the present invention, also with good chemical stability, degree of staining；Its
Proportion is relatively low, alleviates the weight of glass elements and optical system；With excellent achromatism energy, optical system can be improved
The image quality of system；Recrystallization temperature is relatively low simultaneously, makes it easier to realize batch production.
Embodiment
When fluorphosphate glass is in molten condition, the fluorine highly volatile in glass.This volatilization easily causes glass
Top layer and the component difference of inside glass, and then glass is shown optical heterogeneity, i.e. glass cord.And the volatilization of fluorine with
The temperature of glass metal is relevant, and temperature is higher, and degree of volatility is bigger.So in order to reduce the formation of striped as far as possible, it should reduce
The forming temperature of coming out of the stove of glass.But relatively low forming temperature of coming out of the stove is also easier to cause fluoride glass devitrification.And the present invention is set
The fluorphosphate glass of meter can overcome above-mentioned technical problem, and the stability, glass of acquisition is good, is not easy milkiness.Additionally, it is provided light
The optical glass for learning the low-refraction needed in design and low dispersion is another target of the invention.It is in addition, because different
Refractive index and the matching degree of dispersion require different in optical design, so, refractive index nd and dispersion spirit can be made by obtaining one kind
The low refraction of matching living, low dispersion are also the target of the present invention.
Hereinafter, the various embodiments of the present invention will be described in detail.
The present invention provides a kind of fluorophosphate optical glass, including the following components in terms of compound：
P2O5：19~30%, preferably 24~29%；
AlF3：11~18%, preferably 12~16%；
Al2O3：1~6%, preferably 1~4%；
BaO：46~62%, preferably 49~59%；
SrO：1~6%, preferably 1~5%；
Na3AlF6：1~8%, preferably 2~6%；
SnF4：0.1~3%, preferably 0.1~2%；
B2O3：0~2%, preferably 0~1.5%；
Sb2O3：0.01~0.3%, preferably 0.01~0.2%；
Above ingredient weight is more than 99%；
Above-mentioned percentage is weight percentage.
The use of raw material incorporation way can introduce the diversified forms of the compound of its corresponding content.In as described below, each group
The content divided is expressed in weight percent.
P2O5It is network generation body, two kinds of elements (phosphorus and oxygen) by its introducing glass are all the groups for forming glass skeleton
Point.Therefore P2O5The required composition of stability, glass is to maintain, and the mechanical performance of glass can be effectively improved.But P2O5Content
During less than 19%, the tendency towards devitrification of glass gradually increases, bad stability；And P2O5Content be higher than 30% after, be difficult to obtain
Obtain expected optical property.So to obtain heretofore described optical glass, P2O5Content be 19~30%, preferred model
Enclose for 24~29%.
P2O5Raw material has strong moisture absorption, and the use of raw material and management process are complicated, and easily make after the moisture absorption being present
P2O5Component introduces the drawbacks of inaccurate.BaO contents are more in the present invention, and being computed can be by BaO and P2O5It is combined as Ba
(PO3)2Raw material, and Ba (PO3)2Production technology in metaphosphoric acid salt raw material is most mature and stable, it is preferable that is adopted in the present invention
With Ba (PO3)2Form introduce P2O5Component.
AlF3The two kinds of elements (aluminium and fluorine) introduced are also all the components for forming glass network skeleton, and fluorine element is also
Reduce product dispersion, improve Abbe number υ d key components.AlF3Have to the devitrification resistance and chemical stability for improving glass
Effect, it is also significant to the mechanical performance and linear expansion coefficient of raising glass.In the glass system of the present invention, when
AlF3Content when being less than 11%, be difficult to improve Abbe number υ d target because of the reduction of fluorine element in glass, that is, be difficult to
Realize nd, υ d matching relationship；And work as AlF3Content be higher than 18% when, the transition temperature Tg of glass can significantly rise, and make
Raised into forming temperature, in addition, AlF3Content is excessive also to increase the milkiness trend of glass, fragility increase, abrasion degree increase
Greatly.So AlF3Content be 11~18%, preferred scope be 12~16%.
Al2O3Glass network skeleton can also partly be entered, it is effective to the devitrification resistance and chemical stability of raising glass,
And the abrasion degree to reducing glass product is beneficial.Al2O3Important function be and AlF3Matching uses, and is ensureing Al3+Content is not
Oxygen fluorine ratio (O/F) is adjusted on the premise of change, that is, adjusts Abbe number υ d, and Abbe number υ d and refractive index nd matching.The present invention
Glass system in, work as Al2O3Content be less than 1% when, be unfavorable for play more than act on；And work as Al2O3Content be higher than 6%
When, the transition temperature Tg of glass can significantly rise, and raise forming temperature, and the milkiness trend of glass can be made to increase rapidly
Greatly.So Al2O3Content is 1~6%, and preferred scope is 1~4%.The implication of described " refractive index and dispersion matching "
It is：When refractive index value determines, the departure degree of dispersion values relative target value, deviation is smaller, and matching is better.
In the present invention, BaO, SrO are introduced as adjustment component, are all alkaline earth oxide, the two is in glass
In effect it is similar.By adjusting ratio therebetween and the ratio with network generation body, expected light can reached
While learning property, optimize the processing performance of glass to greatest extent, improve the stability of glass.
BaO is favourable to the devitrification resistance and refractive index nd for improving glass, appropriate to introduce the recrystallization temperature that reduce glass
Lt, improve crystallization property, while BaO is also the required composition for improving glass melting.In the present invention, when BaO content is low
When 46%, the chemical stability and devitrification resistance property of glass are deteriorated；But when BaO content is higher than 62%, then it can make glass
Refractive index becomes big, it is difficult to reaches expected optical property, while can also increase the proportion of glass, makes the optical lens of design
Weight increases.So BaO content is 46~62% in the present invention, preferred scope is 49~59%.
As it was previously stated, effects of the SrO with BaO in glass is similar, can be substituted for each other within the specific limits with BaO, but
The amounts of fusing into of SrO in glass are far away from BaO.In the present invention, when SrO content is less than 1%, it is unfavorable for matching somebody with somebody with BaO
The effect for playing adjustment refractive index nd and proportion is closed, but if SrO content is higher than 6%, then can gradually reduce the change of glass
Stability is learned, increases the crystallization trend of glass.So SrO content is 1~6%, preferred scope is 1~5%.
NaF can reduce transition temperature Tg, NaF and AlF3It is used in conjunction with, having reduces dispersion, improves Abbe number υ d's
Effect, but more NaF can then reduce the stability of glass, increase the crystallization trend of glass, and the chemically stable of glass can be made
Property runs down.In the present invention, in order to reduce product cost, NaF compositions are not introduced with NaF raw material forms, and are all used
Na3AlF6(ice crystal) form introduces.
Na3AlF6The introducing effect of (ice crystal) and with 3：2 mass ratio introduces NaF and AlF3Effect it is identical.And
In the market Na3AlF6(ice crystal) cost of material is only NaF and AlF3About a quarter, so in the present invention, introduce
Na3AlF6The cost of glass can be greatly lowered.In view of AlF3With the effects of NaF in glass, work as Na3AlF6Content is less than
When 1%, it can cause to need to introduce extra NaF compositions in glass indirectly, and NaF prices are far above Na3AlF6, this is unfavorable for reality
The target of cost is now reduced, and if Na3AlF6When content is more than 8%, then it can cause NaF, AlF in glass indirectly3Increase, makes
The crystallization property and chemical stability of product are deteriorated, and abrasion degree can be caused gradually to increase.So Na in the present invention3AlF6
Content be 1~8%, preferred scope be 2~6%.
SnF4Introducing can preferably adjust the optical property of glass, refractive index nd and dispersion is more matched.Because
Present invention discover that for the contribution margin of refractive index, SnF4Will be big than other fluorides to the contribution margin of dispersion,
That is compared with other fluorides, SnF4Influence to dispersion is bigger relative to refractive index nd influence.It is a small amount of to introduce
SnF4, glass can be made to be easier to realize the matching of refractive index and dispersion, and the devitrification resistance and chemistry of glass can be optimized
Stability.If SnF4Content be higher than 3%, then the water resistance of glass can be made to be deteriorated, while also result in refractive index nd and color
Dissipate and significantly increase, low-refraction, the target of low dispersion can not be realized.So SnF4Content be 0.1~3%, preferred model
Enclose for 0.1~2%.
Described " contribution margin of refractive index " refers to：After increasing a certain amount of (such as 1%) a certain component, glass refraction
Rate nd increment." to the contribution margin of dispersion " meaning is similar therewith.It is above-described to refer to " to the contribution margin of dispersion "：Increase
After a certain component of a certain amount of (such as 1%), the increment of glass dispersion.
Fluorine (F) content in glass is effective to the refractive index nd of reduction glass and dispersion.Fluorine if (F) content mistake
Few, then refractive index and dispersion tends to become big, can not realize low-refraction, the target of low dispersion., whereas if fluorine (F) content mistake
More, then the ionic bond in glass will increase, and the less feature of ionic bond bond energy can cause the unstable of glass skeleton, this
Glass can be made to be easier devitrification, and fluorine (F) content excessively also can increase the abrasion degree of product, and excessive abrasion angle value
The allowance control being unfavorable in glass fine-grinding polishing process.In the present invention, the fluorine in glass (F) is by compound addition
AlF3、Na3AlF6、SnF4To introduce, in addition, other fluorides are not artificially introduced in the present invention.
Present invention discover that the refractive index of fluorphosphate glass and dispersion are relevant with the oxygen fluorine ratio (O/F) in glass.Oxygen fluorine ratio
(O/F) bigger, i.e., oxygen content is higher, and the refractive index of glass is higher, and dispersion is bigger, and rational oxygen fluorine ratio (O/F) is for carrying
The resistance to milkiness performance of high glass is particularly important.The content for employing above-mentioned oxide and fluoride in the present invention compares with matching somebody with somebody
Oxygen fluorine ratio (O/F) in glass is controlled.
B2O3It is the component for forming glass network skeleton, in the present invention, adds B on a small quantity2O3The analysis of glass can be improved
Brilliant performance and melting behaviour, in order to ensure the good performance of above effect, B2O3Content be less than 2%, if excessive
Addition then can make the chemical stability of glass gradually be deteriorated.Therefore, B2O3Constituent content is 0~2%, preferably 0~1.5%.
Sb2O3Can arbitrarily it be added as defrother, but its content is within 0.3% it is sufficient that, and Sb2O3Content
If more than 0.3%, the degree of staining and internal transmitance that cause glass will be deteriorated, and can increase refractive index nd and dispersion.Cause
This, Sb2O3Constituent content is defined to 0.01~0.3%, preferably 0.01~0.2%.
The present invention also provides a kind of preparation method of the fluorophosphate optical glass according to the present invention, including：By each component
Proportionally weigh, it is well mixed after carry out melting, then pour into a mould or leak note and is molded in mould, or direct pressing
Shaping.
Specifically, weighed respectively in defined ratio, after being mixed into batch, in 1050 in the crucible that platinum makes
Melting is carried out at a temperature of~1150 DEG C, after raw material is melted into glass metal, temperature is increased to 1160~1260 DEG C and opened
The agitator that platinum makes is stirred, is homogenized, and mixing time is controlled in 3~8h.After the completion of stirring, 1220 are warming up to~
1320 DEG C and be incubated 4~9h, clarified, bubble is fully floated, then cool the temperature to 960~1060 DEG C and pour into a mould or
Leakage note is in mould or through compression molding, and finally processing obtains the optical glass of the present invention after annealing.
Fluorphosphate glass containing substantial amounts of fluorine because having strong volatility, in order to weaken glass surface because fluorine is waved
Send out and caused optical heterogeneity (striped) and the pollution to environment, it is preferred that in the production of fluorphosphate glass,
The upper surface that mould glass fluid flows through adds cooling cover plate, and inert gas is led into glass metal table by cooling cover plate
Face, glass metal is set to be cooled and shaped as early as possible.In addition, to prevent erosion of the glass to melting kettle, it is preferred that in non-reducing atmosphere
Middle melting, oxygen can be passed through during concrete operations in melting crucible or adds oxidation molten bath.
The present invention also provides a kind of optical element, and it includes the fluorophosphate optical glass according to the present invention.It can pass through
Fluorophosphate optical glass is carried out once or optical element is made in secondary press production, optical element can be used in all kinds of light
In the optical system for learning instrument.
Embodiment
More specific description is carried out to the present invention below by embodiment, but the present invention is not limited to these embodiments.
Embodiment 1~11 is that the present invention is used to illustrate that it is 1.56~1.62 to obtain refractive index nd in table, and Abbe number υ d are 67~71 fluorine
The model experiment of phosphate optical glass.
Embodiment 1~9
Each component in table 1 below and table 2 is calculated in defined ratio, weighs, mix, puts into the earthenware of platinum making
Melting is carried out in crucible at a temperature of 1100 DEG C, O is passed through into crucible in fusion process2Protect platinum surface not to be etched, treat
Raw material is melted into after glass metal, is increased to 1200 DEG C by temperature and is opened the agitator of platinum making be stirred, be homogenized, stir
Time control is mixed in 5h.After the completion of stirring, it is warming up to 1250 DEG C and is incubated 6h, clarified, bubble is fully floated, then
1000 DEG C of cast or leakage note are cooled the temperature in mould, and cooling cover plate as described above is added on mould,
Inert gas is led into glass metal surface by cooling cover plate, fluorine is solved and is lost in caused volatilization stripes problem.Most afterwards through moving back
Fire, processing obtain the optical glass or optical element of embodiment 1~9.
Comparative examples A~C
Raw material corresponding to component in table 2 below is weighed in defined ratio respectively, using with the identical of embodiment 1~9
Prepared by preparation method, obtain Comparative examples A~C optical glass.
The properties of the fluorophosphate optical glass of acquisition are measured by following method.
Refractive index nd, Abbe number υ d survey are carried out to the optical glass according to GB/T7962.1-2010 method of testing
Amount.
Optical glass shortwave transmitted spectrum characteristic degree of staining λ80/λ5Represent.λ80When referring to that spectral transmittance reaches 80%
Corresponding wavelength, λ5Refer to that spectral transmittance reaches corresponding wavelength when 5%.According to Japanese glass industry association JOGIS02-
2003 " optical glass degree of staining assay method ", determine the glass that the thickness through parallel opposite grinding is 10 ± 0.1mm
Light penetration.
It is saturating in the inside of 700nm, 400nm, 350nm position to wavelength according to GB/T7962.12-2010 method of testing
Rate (τ 10, thickness of sample are 10 ± 0.1mm) is crossed to be measured.
The proportion of gained optical glass is tested according to GB/T7962.20-2010 method of testing.
The transition temperature Tg of gained optical glass is tested according to GB/T7962.16-2010 method of testing.
Lt is liquidus temperature, i.e. crystallization ceiling temperature, and its test is carried out using DTA (differential thermal analysis) method,
Temperature corresponding to temperature highest heat absorption peak is Lt in DTA curve.
According to JB/T10576-2006 method of testing to the water resistance D of gained optical glassWWith acid resistance DASurveyed
Examination.D according to national standard method of testing to gained optical glassARatio is corroded to be tested.
The abrasion degree Fa of gained optical glass is tested according to GB/T7962.19-2010 method of testing.
Table 1：The glass ingredient and performance parameter of embodiment 1~6.
Table 2：The glass ingredient and performance parameter of embodiment 7~9 and Comparative examples A~C.
It can be seen that from embodiment 1~9：Present invention preferably uses with Ba (PO3)2Form introduce P2O5, its is good
Place is that production frequency of abnormity is greatly reduced, makes properties of product more stable controllable.SnF4Introducing can make refractive index nd and color
Dissipating has bigger package space, and in the case of Abbe number υ d identicals, refractive index nd can differ 180 × 10-4More than.
When reaching identical, expected optical constant, the glass of embodiment has the chemical stability and Tg/Lt higher than comparative example
Value and lower abrasion degree Fa, higher Tg/Lt values show that glass has more preferable devitrification resistance property, illustrate that product is more suitable for
The batch production stablized, and relatively low abrasion degree Fa then illustrates that product is more convenient for carrying out fine-grinding and polishing processing.Separately
Outside, Na is being used3AlF6Material-introducing section divides AlF3After NaF so that the glass formula cost in the present invention is greatly reduced.
From table 2 it can be seen that in Comparative examples A, P2O5、AlF3、A2O3Content be less than the framework of the present definition, B2O3、
Sb2O3Content higher than the scope required for the present invention, and contain 7.3% BaF2, do not contain necessary component of the invention
Na3AlF6And SnF4, not within the scope of the present invention, internal transmitance is relatively low, is not inconsistent by refractive index nd and Abbe number the υ d of glass
Fine definition and high-resolution requirement are closed, and proportion substantially increases, DAErosion increases than also, and the chemical stability of glass becomes
Difference.
In comparative example B, AlF3, BaO content it is relatively low, and SrO content is higher, and contains 12% CaO and 6%
YF3, and do not contain the necessary component Na of the present invention3AlF6、SnF4And Sb2O3, the glass of acquisition is unsatisfactory for Abbe number of the present invention
υ d requirement, recrystallization temperature Lt is higher, should not produce, and acid resistance DAFor 4 grades, DACorrode ratio to greatly increase, illustrate glass
Chemical stability is seriously deteriorated, while abrasion degree Fa also increases, the allowance control being unfavorable in glass fine-grinding polishing process.
In comparative example C, BaO content is relatively low, and B2O3Content it is higher, and contain 7.3% CaO, 5.95%
BaF2, 1.2% K2SiF6With 5.12% LiF, and do not contain the present invention necessary component AlF3、Na3AlF6、SnF4, glass
Recrystallization temperature Lt it is higher, should not produce, and Tg/Lt is less than 0.610, illustrates that the devitrification resistance of glass is deteriorated, while DAInvade
Erosion increases than also, and the chemical stability of glass is deteriorated, and abrasion degree Fa also increases, the public affairs being unfavorable in glass fine-grinding polishing process
Difference control.
Therefore, weighed according to the ratio provided in the present invention, mix these raw materials, and batch is put into platinum system
In the smelting apparatus of work, appropriate oxidation, stirring, clarification, temperature reduction technology is taken to carry out melting, then noted using appropriate leakage, be lazy
Property the post-processing such as moulding process, last annealed, processing such as gas cooling protection, cooling solidification, the production that can stablize is not
Devitrification, there is refractive index nd is 1.56~1.62, Abbe number υ d are 67~71 low-refraction, low-dispersion optical glass for mold.Should
Optical glass can substitute the optical element and optical instrument that fluoride (such as calcirm-fluoride) crystal is used to require high-precision aberration
In, such as in lens and prism using camera and projecting apparatus as the optical instrument of representative.The optical glass also has relatively low
Softening point and higher fluorescence intensity, non-spherical lens can be made by secondary press, be produce digital product excellent light
Learn material.
Industrial applicability
Fluorophosphate optical glass of the present invention and preparation method thereof can be produced industrially, also, the present invention
Optical element can be used in all kinds of optical instruments optical system in.
Claims (10)
1. a kind of fluorophosphate optical glass, it is characterised in that including the following components in terms of compound：
P2O5：19~30%, preferably 24~29%；
AlF3：11~18%, preferably 12~16%；
Al2O3：1~6%, preferably 1~4%；
BaO：46~62%, preferably 49~59%；
SrO：1~6%, preferably 1~5%；
Na3AlF6：1~8%, preferably 2~6%；
SnF4：0.1~3%, preferably 0.1~2%；
B2O3：0~2%, preferably 0~1.5%；
Sb2O3：0.01~0.3%, preferably 0.01~0.2%；
Above ingredient weight is more than 99%；
Above-mentioned percentage is weight percentage.
2. fluorophosphate optical glass according to claim 1, it is characterised in that the folding of the fluorophosphate optical glass
It is 1.56~1.62 to penetrate rate nd, and Abbe number υ d are 67~71.
3. fluorophosphate optical glass according to claim 1 or 2, it is characterised in that the fluorophosphate optical glass
Degree of staining λ80/λ5In λ80Below 370, λ5Below 310.
4. according to the fluorophosphate optical glass described in claim any one of 1-3, it is characterised in that the fluorophosphate optics
The recrystallization temperature Lt of glass is less than or equal to 950 DEG C, and devitrification resistance Tg/Lt is more than 0.610.
5. according to the fluorophosphate optical glass described in claim any one of 1-4, it is characterised in that the fluorophosphate optics
When the thickness of glass is 10mm, inside transmitance of the wavelength in 700nm is more than or equal to 99.7%, and wavelength is in 400nm
Internal transmitance is more than or equal to 98.0%, and inside transmitance of the wavelength in 350nm is more than or equal to 70.0%.
6. according to the fluorophosphate optical glass described in claim any one of 1-5, it is characterised in that the fluorophosphate optics
The proportion of glass is in 4.20g/cm3Below.
7. according to the fluorophosphate optical glass described in claim any one of 1-6, it is characterised in that the fluorophosphate optics
The water resistance D of glasswFor 1 grade, acid resistance DAFor 2 grades or 3 grades, DACorrode than being less than or equal to 0.50%.
8. according to the fluorophosphate optical glass described in claim any one of 1-7, it is characterised in that the fluorophosphate optics
The abrasion degree Fa of glass is less than or equal to 390.
A kind of 9. preparation method of fluorophosphate optical glass according to claim any one of 1-8, it is characterised in that bag
Include：Each component is proportionally weighed, it is well mixed after carry out melting, then pour into a mould or leak note in mould, Huo Zhezhi
Connect compressing.
10. a kind of optical element, it is characterised in that including the fluorophosphate optics glass according to claim any one of 1-8
Glass.
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| CN201710887774.4A CN107628749B (en) | 2017-09-27 | 2017-09-27 | Fluorophosphate optical glass, preparation method thereof and optical element |
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| CN201710887774.4A CN107628749B (en) | 2017-09-27 | 2017-09-27 | Fluorophosphate optical glass, preparation method thereof and optical element |
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| CN107628749A true CN107628749A (en) | 2018-01-26 |
| CN107628749B CN107628749B (en) | 2020-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113003935A (en) * | 2021-02-07 | 2021-06-22 | 湖北新华光信息材料有限公司 | Fluorophosphate optical glass, preparation method thereof and optical element |
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| CN101941798A (en) * | 2009-07-10 | 2011-01-12 | 湖北新华光信息材料股份有限公司 | Optical glass with low refraction and chromatic dispersion |
| US20140171287A1 (en) * | 2007-09-28 | 2014-06-19 | Ohara Inc. | Optical glass |
| CN105452183A (en) * | 2013-06-04 | 2016-03-30 | Hoya株式会社 | Optical glass, optical element blank, glass material for press forming, optical element, and processes for producing these |
| CN106277753A (en) * | 2010-08-23 | 2017-01-04 | 株式会社小原 | Optical glass and optical element |
| JP2017048108A (en) * | 2016-11-30 | 2017-03-09 | 株式会社オハラ | Optical glass, optical element and preform |
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| EP1162180A1 (en) * | 2000-06-05 | 2001-12-12 | Kabushiki Kaisha Ohara | Optical glass suffering little change in refractive index when exposed to ultra-violet light during service |
| US20140171287A1 (en) * | 2007-09-28 | 2014-06-19 | Ohara Inc. | Optical glass |
| CN101941798A (en) * | 2009-07-10 | 2011-01-12 | 湖北新华光信息材料股份有限公司 | Optical glass with low refraction and chromatic dispersion |
| CN106277753A (en) * | 2010-08-23 | 2017-01-04 | 株式会社小原 | Optical glass and optical element |
| CN105452183A (en) * | 2013-06-04 | 2016-03-30 | Hoya株式会社 | Optical glass, optical element blank, glass material for press forming, optical element, and processes for producing these |
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| CN113003935A (en) * | 2021-02-07 | 2021-06-22 | 湖北新华光信息材料有限公司 | Fluorophosphate optical glass, preparation method thereof and optical element |
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| CN107628749B (en) | 2020-09-04 |
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