CN108249755A - Optical glass - Google Patents
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- CN108249755A CN108249755A CN201810259289.7A CN201810259289A CN108249755A CN 108249755 A CN108249755 A CN 108249755A CN 201810259289 A CN201810259289 A CN 201810259289A CN 108249755 A CN108249755 A CN 108249755A
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- 239000005304 optical glass Substances 0.000 title claims abstract description 52
- 239000011521 glass Substances 0.000 claims abstract description 151
- 239000006185 dispersion Substances 0.000 claims abstract description 37
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 23
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims abstract description 22
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 13
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 13
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 30
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 17
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 14
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 14
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 claims description 9
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims description 9
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims description 8
- FIXNOXLJNSSSLJ-UHFFFAOYSA-N ytterbium(III) oxide Inorganic materials O=[Yb]O[Yb]=O FIXNOXLJNSSSLJ-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052593 corundum Inorganic materials 0.000 claims description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 7
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 claims 2
- 239000000126 substance Substances 0.000 abstract description 24
- 238000004031 devitrification Methods 0.000 abstract description 17
- 238000013461 design Methods 0.000 abstract description 3
- 238000013112 stability test Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 15
- 238000002425 crystallisation Methods 0.000 description 9
- 230000008025 crystallization Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 oxide Chemical compound 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Abstract
The present invention provides the optical glass that a kind of reduction is not even leaded, chemical stability is good, relative partial dispersion is small.Optical glass, weight percent composition include：SiO210 35%, La2O30 14%, ZnO 0 14%, ZrO20 10%, BaO 8 35%, Nb2O515 43%.The present invention is by being reasonably formulated design, optical glass refractive index is made to be 1.82 1.88, Abbe number is 27 33, Optical Glass Chemical Stability Test is good, and excellent and glass the relative partial dispersion of devitrification resistance energy is small, can be widely applied to the equipment such as digital camera, digital camera, camera cell phone.
Description
Technical field
The present invention relates to the optical glass that a kind of refractive index is 1.82-1.88, Abbe number is 27-33 and by the optics
The gas preform and optical element that glass is formed.
Background technology
In optical design, by height refraction, made of high-dispersive optical glass lens with by low refraction, low dispersion optical glass
Lens made of glass are used in combination, to correct the aberration of optical system.Height refraction, in high-dispersive optical glass field it is known that
Glass containing a large amount of lead such as JP Tetsukai 57-34042, wherein containing a large amount of lead oxide, causes chemical stability poor, simultaneously
Specific gravity of glass is big, is not suitable with light-weighted needs, simultaneous oxidation lead at present and environment is also harmful to.
Other than part is containing lead oxide, high-refraction high-dispersion glass also using phosphate system, causes glass mostly
Poor chemical stability so that glass yields in the processing in later stage and plated film flow reduces, and CN104981439A discloses one
Kind refractive index is 1.78-1.83, the high-refraction high-dispersion glass that Abbe number is 20-25, the P containing 20-34%2O5, lead to glass
The poor chemical stability of glass so as to bring difficulty to post-production, reduces the market competitiveness of product.
Meanwhile it along with the development of imaging system, needs to realize correction high order aberration in imaging optical system, this is just needed
The high dispersing lens of high refractive index is wanted other than with high dispersion characteristics, it is also necessary to meet the characteristics of relative partial dispersion is small.
Invention content
The technical problems to be solved by the invention be to provide it is a kind of reduce it is even not leaded, chemical stability is good, counterpart
Color separation dissipates small optical glass.
The present invention also provides a kind of gas preform and optical element formed by above-mentioned optical glass.
The technical proposal for solving the technical problem of the invention is：Optical glass, weight percent composition include：
SiO210-35%, La2O30-14%, ZnO 0-14%, ZrO20-10%, BaO 8-35%, Nb2O515-43%.
Further, weight percent composition further includes：B2O30-10%, Al2O30-10%, Gd2O30-10%,
Y2O30-10%, Yb2O30-10%, Li2O 0-10%, Na2O 0-10%, K2O 0-10%, MgO 0-10%, CaO 0-
15%, SrO 0-10%, Ta2O50-15%, TiO20-10%, WO30-10%, Sb2O30-1%.
Further, weight percent composition is：SiO210-35%, La2O30-14%, ZnO 0-14%, ZrO2
0-10%, BaO 8-35%, Nb2O515-43%, B2O30-10%, Al2O30-10%, Gd2O30-10%, Y2O3 0-
10%, Yb2O30-10%, Li2O 0-10%, Na2O 0-10%, K2O 0-10%, MgO 0-10%, CaO 0-15%, SrO
0-10%, Ta2O50-15%, TiO20-10%, WO30-10%, Sb2O30-1%.
Further, wherein, SiO212-33% and/or B2O30-8% and/or Al2O30-5% and/or La2O3
3-13% and/or Gd2O30-5% and/or Y2O30-5% and/or Yb2O30-5% and/or ZnO 1-12% and/or
ZrO20.5-9% and/or Li2O 0-5% and/or Na2O 0-5% and/or K2O 0-5% and/or MgO 0-5% and/
Or CaO 0-10% and/or SrO 0-5% and/or BaO 10-33% and/or Ta2O50-10% and/or TiO2 0-
5% and/or Nb2O518-40% and/or WO30-5% and/or Sb2O30-0.5%.
Further, wherein, (La2O3+ZnO)/ZrO2For 0.5-9 and/or Li2O+Na2O+K2O be 0-10% and/or
BaO+SrO+CaO+MgO is 15-33% and/or Ba0/ (BaO+SrO+CaO+MgO) is 0.5-0.95 and/or TiO2/Nb2O5
For 0-0.3.
Further, wherein, SiO215-30% and/or B2O30-5% and/or La2O34-12% and/or ZnO
2-11% and/or ZrO21-8.5% and/or Li2O 0-4% and/or CaO 0-5% and/or SrO 0-3.5% and/or
BaO 12-30% and/or Ta2O50-5% and/or TiO20-2%.
Further, wherein, (La2O3+ZnO)/ZrO2For 1-7 and/or Li2O+Na2O+K2O is 0-5% and/or BaO+
SrO+CaO+MgO is 18-30% and/or Ba0/ (BaO+SrO+CaO+MgO) is 0.55-0.9 and/or TiO2/Nb2O5For 0-
0.2。
Further, wherein, (La2O3+ZnO)/ZrO2It is 0.6- for 1.5-5 and/or Ba0/ (BaO+SrO+CaO+MgO)
0.85 and/or TiO2/Nb2O5For 0-0.1.
Further, glass refraction 1.82-1.88, preferably 1.83-1.87；Glass Abbe number is 27-33, preferably
For 28-32；Glass relative dispersion Pg, F are for 0.5998 hereinafter, preferably 0.5980 hereinafter, further preferably less than 0.5960；
Optical glass λ70Less than or equal to 420nm, preferably λ70Less than or equal to 410nm.
Gas preform is formed using above-mentioned optical glass.
Optical element is formed using above-mentioned optical glass.
The beneficial effects of the invention are as follows：For the present invention by being reasonably formulated design, it is 1.82- to make optical glass refractive index
1.88th, Abbe number 27-33, Optical Glass Chemical Stability Test is good, and excellent and glass the relative partial dispersion of devitrification resistance energy is small,
It can be widely applied to the equipment such as digital camera, digital camera, camera cell phone.
Specific embodiment
Ith, optical glass
The composition of the optical glass of the present invention is described in detail below, the content of each glass ingredient, total content do not have such as
There is special instruction, all represented using weight %, the ratio between the content of glass ingredient and total content are represented with weight ratio.
SiO2It is the skeleton of optical glass, body is generated as glass network, has and maintain chemical durability of glass, improve glass
The effect of glass devitrification resistance energy.Work as SiO2When content is less than 10%, it is difficult to reach said effect；But work as SiO2Content is higher than 35%
When, then glass is difficult to melt, and can not obtain the required refractive index of the present invention.Therefore, SiO2Content for 10-35%,
Preferably 12-33%, more preferable 15-30%.
B2O3It can also be used as glass network generation body in glass of the present invention.Work as B2O3When content is more than 10%, glass
Chemical stability is deteriorated, while glass viscosity becomes smaller, and volatilization increases, and is unfavorable for the stability contorting of refractive index and dispersion.Therefore,
B2O3Content is limited to 10% hereinafter, it is preferred that 8% hereinafter, further preferred less than 5%.
Al2O3The chemical stability of glass can be improved, but when its content is more than 10%, the refractive index of glass reduces apparent, melts
Melting property is deteriorated.Therefore, Al of the present invention2O3Content be 0-10%, preferably 0-5%.
La2O3The refractive index of glass, the chemical stability and mechanical strength of reinforcing glass can be effectively improved, and glass can be reduced
The relative partial dispersion of glass, but when its content is more than 14%, the devitrification resistance of glass can will appear apparent deterioration.Therefore, originally
The La of invention2O3Content be 0-14%, preferred content 3-13%, further preferred 4-12%.
Gd2O3Helpful, the partial alternative La for raising refractive index reduction dispersion2O3When can improve glass devitrification resistance
Energy and chemical stability, but expensive cost of material limits Gd2O3Use in glass.Therefore, Gd in the present invention2O3
Content be 0-10%, preferably 0-5%.
Glass ingredient of the present invention may be incorporated into Y2O3, to improve the meltbility of glass, devitrification resistance energy, while can be with
Devitrification of glass ceiling temperature is reduced, improves chemical durability of glass, if but its content is more than 10%, the stability of glass and resistance to
Increased devitrification resistance reduces.Therefore, Y2O3Content range is 0-10%, preferably 0-5%, is not contained further preferably.
Yb2O3And the component that glass can add, when its content is more than 10%, stability, the devitrification resistance drop of glass
It is low.Therefore, Yb2O3Content range is defined to 0-10%, preferably 0-5%, does not introduce further preferably.
ZnO is the active ingredient for improving chemical durability of glass, and the presence of ZnO can reduce the transition temperature of glass, is dropped
The high temperature viscosity of low glass is conducive to the elimination of bubble in glass.ZnO can also reduce the relative partial dispersion of glass.But work as
When ZnO content is few, said effect is not achieved；It when its content is excessive, on the one hand can cause the Abbe number of glass to reduce, can not meet
On the other hand the requirement of refractive index deteriorates the crystallization property of glass.Therefore, the content of ZnO is defined to 0-14%, preferably 1-
12%, further preferably 2-11%.
ZrO2Glass refraction and chemical stability can be improved, but during its too high levels, glass smelting can become difficult to
Melt, smelting temperature can rise, and be easy to cause inside glass and field trash occur, glass transmitance declines, while increases glass system
This is caused, reduces product competitiveness.Therefore, ZrO of the invention2Content for 0-10%, preferably 0.5-9%, it is further excellent
It is selected as 1-8.5%.
High-refraction high-dispersion glass needs relatively small relative partial dispersion to realize correction high order aberration.Although
The added value of this glass is high, but be also required to consider during fabrication glass melting temperature, in glass etc. processing performances influence.Hair
A person of good sense by a large amount of research shows that, work as La2O3With the total content (La of ZnO2O3+ ZnO) and ZrO2The ratio between content (La2O3+
ZnO)/ZrO2During ranging from 0.5-9, the glass that dispersion of refractive index is suitable, relative dispersion is low and processing performance is good could be obtained,
In order to obtain the glass of optical property and better technological properties, (La2O3+ZnO)/ZrO2Preferred scope is 1-7, further preferably
Ranging from 1.5-5.
Li as alkali metal oxide2O、Na2O and K2O can reduce glass relative partial dispersion, improve glass melting
Effect makes glass have low transition temperature.Work as Li2O、Na2O and K2Total content (the Li of O2O+Na2O+K2When O) more than 10%,
The refractive index of glass reduces, and chemical stability deteriorates.Therefore, Li in the present invention2O+Na2O+K2The total content of O is limited in 0-
10%, preferred scope 0-5%.
In alkali metal oxide, Li2O has apparent effect for reducing glass relative partial dispersion, but it is former
Material the cost is relatively high, large-scale production it is uneconomical, therefore its content be limited to 10% hereinafter, be preferably controlled in 5% hereinafter, into
One step is preferably controlled in less than 4%.
Na2O、K2O is added to adjust the transition temperature of optical data, the meltbility for improving glass, reduction glass,
But in order to keep devitrification resistance and chemical stability, Na2O、K2The content of O should be respectively lower than 10%.Therefore, Na2O、K2O's
Content range is defined to 0-10%, preferably 0-5% respectively.
MgO can effectively reduce the relative partial dispersion of glass, but the refractive index of glass is not achieved and sets when MgO adds in excessive
Meter requirement, the devitrification resistance of glass can decline, while the cost of glass can rapid increase with the stability of glass.Therefore, MgO
Content is defined to 0-10%, preferably 0-5%, does not add further preferably.
CaO helps to improve the devitrification resistance energy of glass, increases the mechanical strength and hardness of glass.But CaO was added
When more, the optical data of glass can be caused not reach requirement.Therefore, CaO content is defined to 0-15%, preferably 0-10%, into
One step is preferably 0-5%.
SrO is added to the refractive index and Abbe number that glass can be adjusted in glass, if but additive amount it is excessive, the chemistry of glass
Performance for stability can decline, while the cost of glass also can rapid increase.Therefore, SrO contents are defined to 0-10%, preferably 0-
5%, further preferably 0-3.5%.
BaO is the necessary component for improving glass refraction, improving glass transmitance.It is acted on not when its content is less than 8%
Significantly；But when its content is more than 35%, then the devitrification resistance and chemical stability that can enable glass are deteriorated.Therefore, BaO contents
It is defined to 8-35%, preferably 10-33%, further preferably 12-30%.
BaO, SrO, CaO, MgO belong to alkaline earth oxide, belong to network outer body in glass, and adding in can in glass
To adjust the refractive index of glass and dispersion, the high temperature viscosity of glass is reduced.However, the addition of network outer body is once more than network
The bearing capacity of structure, the chemical stability of glass just will appear apparent deterioration.Therefore, the total content of BaO, SrO, CaO and MgO
(BaO+SrO+CaO+MgO) 15-33%, preferably 18-30% are defined to.
The technology of the making eyeglass of mainstream is to make lens blank using " secondary press " at present, then re-polishing
Obtain qualified glass lens." secondary press " processing technology of optical glass refers to raw glass being cut into fritter, in stove
It is heated up near glass transition temperature in body, then glass is put into mold, pressurization under the effect of external force obtains suitable
Lens shape.If glass forms crystallization during " secondary press ", it may result in molded piece and scrap.Inventor is by grinding with great concentration
Study carefully discovery, there are during certain ratio between BaO and the total content (BaO+SrO+CaO+MgO) of BaO, SrO, CaO and MgO,
It can guarantee glass die mould not crystallization.When the ratio Ba0/ (BaO+SrO+CaO+MgO) of BaO and (BaO+SrO+CaO+MgO) exist
When between 0.5-0.95, the devitrification resistance and optical data that can enable glass are in optimized scope, Ba0/ (BaO+SrO+CaO+
MgO) preferred scope is 0.55-0.9, further preferably 0.6-0.85.
Ta2O5The refractive index of glass can be effectively improved, reduces the relative partial dispersion of glass, but when its content is more than 15%
When, the crystallization property of glass can on the one hand deteriorated, the melted of glass on the other hand can be caused to become difficult, while its price is held high
The expensive cost that can lead to glass is substantially increased, and reduces the competitiveness of product in market.Therefore, Ta is limited2O5Ranging from 0-15%,
Further preferably 0-10%, further preferably 0-5%.
TiO2Have the function of to improve glass refraction, and glass network can be participated in and formed, appropriate introduce can make glass
It is more stable, but the decrease in transmission of the shortwave part of glass visible light region can be made after introducing, the relative partial dispersion of glass increases
Add apparent.Therefore, TiO of the present invention2Content be 0-10%, further preferably preferably 0-5%, 0-2%.
Nb2O5Have the function of to improve glass refraction and dispersion, while also there is the work for improving chemical durability of glass
With suitable Nb2O5Also helping reduces the relative partial dispersion of glass.When its content is less than 15%, it is unable to reach above-mentioned effect
Fruit；When its content is more than 43%, glass devitrification resistance can deteriorate.Therefore, Nb2O5Content range for 15-43%, preferred content
For 18-40%.
TiO2And Nb2O5Belong to high-refraction high-dispersion oxide, in comparison, TiO2It is more advantageous to obtaining high refraction height
Dispersive glass, but TiO2The transmitance of glass can be caused to be deteriorated, increase the relative partial dispersion of glass.Inventor is by with great concentration
The study found that work as TiO2With Nb2O5Content compare TiO2/Nb2O5When maintaining 0-0.3, be just conducive to obtain high refractive index, penetrate
The glass that rate is good and relative partial dispersion is low, preferably TiO2/Nb2O5Ranging from 0-0.2, further preferred TiO2/Nb2O5Range
For 0-0.1.
WO3It can play the role of improving refractive index, but when its content is more than 10%, dispersion improves significantly, and glass
The decrease in transmission of the short wavelength side of glass visible light region.Therefore, WO of the present invention3Content be 0-10%, preferably 0-5%.
By adding Sb on a small quantity2O3Component can improve the clarifying effect of glass, but work as Sb2O3When content is more than 1%, glass
Glass has the tendency that Clarification Performance reduction, simultaneously because its strong oxidation promotes the platinum of melted glass or platinum alloy vessel
Corrosion and the deterioration of molding die.Therefore, the preferred Sb of the present invention2O3Additive amount be 0-1%, more preferably 0-0.5%.
[optical characteristics of optical glass]
The present invention optical glass from assign suitable for its purposes optical characteristics from the point of view of, glass refraction (nd)
Ranging from 1.82-1.88, preferably ranging from 1.83-1.87；Abbe number (the ν of glass of the present inventiond) ranging from 27-33, it is excellent
Select ranging from 28-32.
[relative partial dispersion of optical glass]
Relative partial dispersion (Pg, F) is using each refractive index ng, nF, nC in g lines, F lines, C lines, by relative partial dispersion
Pgf is expressed as (ng-nf)/(nf-nc).
Specifically formula is：
The present invention optical glass from assign suitable for its purposes optical characteristics from the point of view of, glass relative dispersion (Pg,
F) ranging from 0.5998 hereinafter, preferred scope for 0.5980 hereinafter, further preferably less than 0.5960.
[coloring of optical glass]
The shortwave transmitted spectrum characteristic degree of staining (λ of glass of the present invention70) represent.λ70Refer to that glass transmittance reaches
Corresponding wavelength when 70%, wherein, λ70Measure be to use the thickness with two parallel to each other and optical polish opposite planes
The glass for 10 ± 0.1nm is spent, measure the spectral transmission in the wavelength domain from 280nm to 700nm and shows transmissivity
70% wavelength.So-called spectral transmission or transmissivity are in the vertically incident intensity I of the above-mentioned surface to glassinLight, thoroughly
It crosses glass and projects intensity I from a planeoutLight in the case of pass through Iout/IinThe amount of expression, and also contain glass
Above-mentioned surface on surface reflection loss transmissivity.The refractive index of glass is higher, and surface reflection loss is bigger.Therefore, exist
In glass of high refractive index, λ70The small coloring for meaning glass itself of value it is few.
The optical glass λ of the present invention70Less than or equal to 420nm, preferably λ70Less than or equal to 410nm, it is capable of providing composition
The optical element of the excellent imaging optical system of colour balance or projection optics system.Based on this, optical glass of the invention is fitted
In as the optical element material for forming imaging optical system and projection optics system.
[the devitrification resistance energy of glass]
Mother glass is cut into 20 × 20 × 10mm specifications, is put into the Muffle furnace that temperature is 700-900 DEG C and keeps the temperature 30
Minute, Xu Leng in heat-preservation cotton is put into after taking-up, after cooling, surface polishing, micro- Microscopic observation crystallization situation.
[chemical stability of glass]
For optical element during manufacture and use, the ability that polished surface resists various etching medium effects is known as glass
The chemical stability of glass.
The water-fast effect stability D of glass of the present inventionW(powder method), acidproof effect stability DA(powder method) be 2 classes with
On, it is more than preferably 1 class.
Above-mentioned water-fast effect stability DW(powder method) is calculated according to the following formula by the test method of GB/T17129：
DW=(B-C)/(B-A) * 100
In formula：DW- glass leaches percentage (%)
The quality (g) of B-filter and sample
The quality (g) of sample after C-filter and erosion
A-filter quality (g)
By the leaching percentage being calculated, D is stablized into the water-fast effect of optical glassWIt is divided into 6 classes see the table below.
| Classification | 1 | 2 | 3 | 4 | 5 | 6 |
| Leach percentage (DW) | ＜ 0.04 | 0.04-0.10 | 0.10-0.25 | 0.25-0.60 | 0.60-1.10 | ＞ 1.10 |
Above-mentioned acidproof effect stability DA(powder method) is calculated according to the following formula by the test method of GB/T17129：
DA=(B-C)/(B-A) * 100
In formula：DA- glass leaches percentage (%)
The quality (g) of B-filter and sample
The quality (g) of sample after C-filter and erosion
A-filter quality (g)
By the leaching percentage being calculated, D is stablized into the acidproof effect of optical glassAIt is divided into 6 classes see the table below.
| Classification | 1 | 2 | 3 | 4 | 5 | 6 |
| Leach percentage (DA) | ＜ 0.20 | 0.20-0.35 | 0.35-0.65 | 0.65-1.20 | 1.20-2.20 | ＞ 2.20 |
IIth, gas preform and optical element
The present invention also provides a kind of optical glass prefabricated component and optical element, by above-mentioned optical glass according to art technology
Method is formed known to personnel, and the optical precast product and optical element can be applied to digital camera, number is taken the photograph
The equipment such as camera, camera cell phone.
Embodiment
The present invention is explained using following examples, but the present invention should not be limited to these embodiments.
[optical glass embodiment]
First, glass No.1~20 with the composition shown in 1~table of table 2 in order to obtain, using carbonate, nitrate,
Sulfate, hydroxide, oxide, boric acid etc. are used as raw material, and the raw material corresponding to optical glass element is weighed respectively in proportion
Raw material becomes Blend Stocks, which is put into platinum crucible, is heated to 1250~1450 DEG C after being sufficiently mixed,
And become uniform melten glass, then the melten glass is poured into the mould of preheating and 600 after clarifying stirring 3~5 hours
~700 DEG C keep carrying out slow cooling later in 2~4 hours, obtain each optical glass of glass No.1~20.
In addition, measuring the characteristic of each glass by method as shown below, and measurement result is represented in 1~table of table 2.
(1) refractive index (nd) and Abbe number (ν d)
Refractive index is tested with abbe number according to method as defined in GB/T7962.11-2010.
(2) relative partial dispersion (Pg, F) of optical glass
The relative partial dispersion (Pg, F) of optical glass of the present invention is calculated according to formula described above.
(3) glass coloration degree (λ70)
Using the glass sample that the thickness with two optical polish planes relative to each other is 10 ± 0.1mm, measure and divide
Light transmission is calculated according to its result.
(4) the devitrification resistance energy of glass
Mother glass is cut into 20 × 20 × 10mm specifications, is put into the Muffle furnace that temperature is 700-900 DEG C and protects 30 points
Clock, is put into Xu Leng in heat-preservation cotton after taking-up, cooling rear surface polishing is observed Surface Crystallization situation, represented with K under the microscope.
No apparent crystallization is denoted as " A ", has apparent crystallization to be denoted as " B ".
(5) chemical stability of glass
It measures by the test method of GB/T 17129, is calculated according to above-mentioned formula.
Table 1
Table 2
[optical precast product embodiment]
1 obtained optical glass of embodiment in table 1 is cut into predefined size, then be equably coated with by nitrogen on the surface
Change the releasing agent that boron powder is formed, be then heated, soften, be press-formed, make recessed meniscus shaped lens, convex falcate
The prefabricated component of the various lens such as lens, biconvex lens, biconcave lens, planoconvex spotlight, plano-concave lens, prism.
[optical element embodiment]
By obtained these prefabricated components annealing of above-mentioned optical precast product 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, planoconvex spotlight, plano-concave lens, prism.Antireflection can be also coated on the surface of gained optical element
Film.
The refractive index of glass of the present invention is 1.82-1.88, Abbe number 27-33.The Optical Glass Chemical Stability Test is good, resists
Crystallization property is excellent and the relative partial dispersion of glass is small, can be widely applied to digital camera, digital camera, camera cell phone
Etc. equipment.
Claims (11)
1. optical glass, which is characterized in that its weight percent composition includes：SiO210-35%, La2O30-14%, ZnO
0-14%, ZrO20-10%, BaO 8-35%, Nb2O515-43%.
2. optical glass as described in claim 1, which is characterized in that its weight percent composition further includes：B2O30-10%,
Al2O30-10%, Gd2O30-10%, Y2O30-10%, Yb2O30-10%, Li2O 0-10%, Na2O 0-10%, K2O 0-
10%, MgO 0-10%, CaO 0-15%, SrO 0-10%, Ta2O50-15%, TiO20-10%, WO30-10%, Sb2O3
0-1%.
3. optical glass as described in claim 1, which is characterized in that its weight percent, which forms, is：SiO210-35%,
La2O30-14%, ZnO 0-14%, ZrO20-10%, BaO 8-35%, Nb2O515-43%, B2O30-10%, Al2O3
0-10%, Gd2O30-10%, Y2O30-10%, Yb2O30-10%, Li2O 0-10%, Na2O 0-10%, K2O 0-10%,
MgO 0-10%, CaO 0-15%, SrO 0-10%, Ta2O50-15%, TiO20-10%, WO30-10%, Sb2O3 0-
1%.
4. the optical glass as described in claim 1-3 any claims, which is characterized in that wherein, SiO212-33% and/
Or B2O30-8% and/or Al2O30-5% and/or La2O33-13% and/or Gd2O30-5% and/or Y2O3 0-
5% and/or Yb2O30-5% and/or ZnO 1-12% and/or ZrO20.5-9% and/or Li2O 0-5% and/or
Na2O 0-5% and/or K2O 0-5% and/or MgO 0-5% and/or CaO 0-10% and/or SrO 0-5% and/or
BaO 10-33% and/or Ta2O50-10% and/or TiO20-5% and/or Nb2O518-40% and/or WO3 0-
5% and/or Sb2O30-0.5%.
5. the optical glass as described in claim 1-3 any claims, which is characterized in that wherein, (La2O3+ZnO)/ZrO2
For 0.5-9 and/or Li2O+Na2O+K2O is 0-10% and/or BaO+SrO+CaO+MgO is 15-33% and/or Ba0/ (BaO
+ SrO+CaO+MgO) it is 0.5-0.95 and/or TiO2/Nb2O5For 0-0.3.
6. the optical glass as described in claim 1-3 any claims, which is characterized in that wherein, SiO215-30% and/
Or B2O30-5% and/or La2O34-12% and/or ZnO 2-11% and/or ZrO21-8.5% and/or Li2O 0-
4% and/or CaO 0-5% and/or SrO 0-3.5% and/or BaO 12-30% and/or Ta2O50-5% and/or
TiO20-2%.
7. the optical glass as described in claim 1-3 any claims, which is characterized in that wherein, (La2O3+ZnO)/ZrO2
For 1-7 and/or Li2O+Na2O+K2O is 0-5% and/or BaO+SrO+CaO+MgO is 18-30% and/or Ba0/ (BaO+
SrO+CaO+MgO) it is 0.55-0.9 and/or TiO2/Nb2O5For 0-0.2.
8. the optical glass as described in claim 1-3 any claims, which is characterized in that wherein, (La2O3+ZnO)/ZrO2
It is 0.6-0.85 and/or TiO for 1.5-5 and/or Ba0/ (BaO+SrO+CaO+MgO)2/Nb2O5For 0-0.1.
9. the optical glass as described in claim 1-3 any claims, which is characterized in that glass refraction 1.82-
1.88, preferably 1.83-1.87；Glass Abbe number is 27-33, preferably 28-32；Glass relative dispersion Pg, F for 0.5998 with
Under, preferably 0.5980 hereinafter, further preferably less than 0.5960；Optical glass λ70Less than or equal to 420nm, preferably λ70
Less than or equal to 410nm.
10. gas preform is formed using the optical glass described in claim 1-9 any claims.
11. optical element is formed using the optical glass described in claim 1-9 any claims.
Priority Applications (2)
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|---|---|---|---|
| CN201810259289.7A CN108249755A (en) | 2018-03-27 | 2018-03-27 | Optical glass |
| CN202311230962.1A CN117105524A (en) | 2018-03-27 | 2018-03-27 | Optical glass |
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|---|---|---|---|
| CN201810259289.7A CN108249755A (en) | 2018-03-27 | 2018-03-27 | Optical glass |
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| CN202311230962.1A Division CN117105524A (en) | 2018-03-27 | 2018-03-27 | Optical glass |
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| CN109502964A (en) * | 2018-12-07 | 2019-03-22 | 成都光明光电股份有限公司 | Heavy-lanthanide flint glass and its prefabricated component, optical element and optical instrument |
| CN109650717A (en) * | 2019-02-28 | 2019-04-19 | 成都光明光电股份有限公司 | Optical glass |
| CN115448591A (en) * | 2022-10-18 | 2022-12-09 | 成都光明光电股份有限公司 | Optical glass, optical element and optical instrument |
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| CN115448591B (en) * | 2022-10-18 | 2023-07-25 | 成都光明光电股份有限公司 | Optical glass, optical element and optical instrument |
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