CN107879621A - Optical glass, preform and optical element - Google Patents
Optical glass, preform and optical element Download PDFInfo
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- CN107879621A CN107879621A CN201711159798.4A CN201711159798A CN107879621A CN 107879621 A CN107879621 A CN 107879621A CN 201711159798 A CN201711159798 A CN 201711159798A CN 107879621 A CN107879621 A CN 107879621A
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- 239000005304 optical glass Substances 0.000 title claims abstract description 127
- 230000003287 optical effect Effects 0.000 title claims description 30
- 239000000203 mixture Substances 0.000 claims abstract description 333
- 239000011521 glass Substances 0.000 claims abstract description 252
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims abstract description 46
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052788 barium Inorganic materials 0.000 claims abstract description 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 4
- 239000006185 dispersion Substances 0.000 claims description 52
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- XOLBLPGZBRYERU-UHFFFAOYSA-N SnO2 Inorganic materials O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 15
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 13
- 229910052681 coesite Inorganic materials 0.000 claims description 13
- 229910052906 cristobalite Inorganic materials 0.000 claims description 13
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims description 13
- 229910052682 stishovite Inorganic materials 0.000 claims description 13
- 229910052905 tridymite Inorganic materials 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 10
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 9
- 229910003069 TeO2 Inorganic materials 0.000 claims description 8
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 8
- 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
- QZQVBEXLDFYHSR-UHFFFAOYSA-N gallium(III) oxide Inorganic materials O=[Ga]O[Ga]=O QZQVBEXLDFYHSR-UHFFFAOYSA-N 0.000 claims description 8
- 229910003443 lutetium oxide Inorganic materials 0.000 claims description 8
- 229910001845 yogo sapphire Inorganic materials 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
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 5
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 4
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 229910052765 Lutetium Inorganic materials 0.000 claims description 3
- 238000012937 correction Methods 0.000 abstract description 5
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004031 devitrification Methods 0.000 description 40
- 239000002994 raw material Substances 0.000 description 26
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 22
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 229910052697 platinum Inorganic materials 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000009477 glass transition Effects 0.000 description 8
- 239000000075 oxide glass Substances 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 7
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 238000004040 coloring Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910020440 K2SiF6 Inorganic materials 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- 229910004835 Na2B4O7 Inorganic materials 0.000 description 2
- 229910004883 Na2SiF6 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 229910001260 Pt alloy Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 229910000149 boron phosphate Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000006063 cullet Substances 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 235000015170 shellfish Nutrition 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910005693 GdF3 Inorganic materials 0.000 description 1
- 229910002339 La(NO3)3 Inorganic materials 0.000 description 1
- -1 Metaphosphoric acid compound Chemical class 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- BHHYHSUAOQUXJK-UHFFFAOYSA-L Zinc fluoride Inorganic materials F[Zn]F BHHYHSUAOQUXJK-UHFFFAOYSA-L 0.000 description 1
- 229910007998 ZrF4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- LJCFOYOSGPHIOO-UHFFFAOYSA-N antimony pentoxide Inorganic materials O=[Sb](=O)O[Sb](=O)=O LJCFOYOSGPHIOO-UHFFFAOYSA-N 0.000 description 1
- GHPGOEFPKIHBNM-UHFFFAOYSA-N antimony(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Sb+3].[Sb+3] GHPGOEFPKIHBNM-UHFFFAOYSA-N 0.000 description 1
- 150000001495 arsenic compounds Chemical class 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006025 fining agent Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229910021513 gallium hydroxide Inorganic materials 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- VBKNTGMWIPUCRF-UHFFFAOYSA-M potassium;fluoride;hydrofluoride Chemical compound F.[F-].[K+] VBKNTGMWIPUCRF-UHFFFAOYSA-M 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000754 repressing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- ANOBYBYXJXCGBS-UHFFFAOYSA-L stannous fluoride Chemical compound F[Sn]F ANOBYBYXJXCGBS-UHFFFAOYSA-L 0.000 description 1
- 229910001637 strontium fluoride Inorganic materials 0.000 description 1
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 description 1
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Inorganic materials [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
Landscapes
- Chemical & Material Sciences (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)
- Glass Compositions (AREA)
Abstract
The present invention provides refractive index (nd) and Abbe number (νd) in target zone, can be preferred for chromatic aberation correction optical glass, and use its lens preform.On optical glass, relative to the glass gross mass formed to be converted with oxide, in terms of quality %, contain 1.0~31.0% B2O3Composition and 40.0~65.0% Ln2O3Composition, TiO2The content of composition is less than 30.0%, Nb2O5The content of composition is less than 30.0%, B2O3Composition, ZnO component, WO3Composition and Li2The quality of O compositions and for more than 3.0% and less than 20.0%, relative to the glass gross mass formed to be converted with oxide, the quality of RO compositions and it is less than 0.950%, in formula, R is selected from one or more of the group being made up of Mg, Ca, Sr, Ba element, does not contain As2O3Composition.Lens preform is using the optical glass as mother metal.
Description
It is January 18, Application No. 201280005509.4, entitled " optics in 2012 applying date that the application, which is,
The divisional application of the application of glass, preform and optical element ".
Technical field
The present invention relates to optical glass, preform and optical element.
Background technology
The optics such as digital camera, video camera system includes the bleeding for being referred to as aberration of different sizes.The aberration is divided
Class is closely related for the material property of the lens of monochromatic aberration and chromatic aberation, especially chromatic aberation with being used in optics system.This
In, in order to improve chromatic aberation, it is desirable to which the partial dispersion ratio (θ g, F) of the optical glass in high-refractivity and low-dispersion region is small.
Partial dispersion ratio (θ g, F) is represented with following formula (1).
θ g, F=(ng-nF)/(nF-nC)······(1)
For optical glass, the partial dispersion ratio (θ g, F) and Abbe number of the partial dispersion in short wavelength region are represented
(νd) between the relation of substantial linear be present.Represent the relation straight line be used in partial dispersion ratio (θ g, F) be the longitudinal axis, with Ah
Shellfish number (νd) 2 points of partial dispersion when Abbe number that NSL7 and PBM2 is marked and drawed for connection on the rectangular co-ordinate of transverse axis obtain
Straight line represent that the straight line is referred to as normal line (Fig. 1 references).As normal line benchmark normal glass according to optical glass
Manufacturer it is different and different, but each company is defined with roughly equal slope and intercept.(NSL7 and PBM2 are a plant formula meetings
The optical glass of the small former manufacture of society, PBM2 Abbe number (νd) be 36.3, partial dispersion ratio (θ g, F) be 0.5828, NSL7 Ah
Shellfish number (νd) it is 60.5, partial dispersion ratio (θ g, F) is 0.5436.)
Here, as with more than 1.80 high index of refraction (nd) and less than 30 low Abbe number (νd) glass, such as
Know and contain more La just like shown in patent document 1~62O3The optical glass of the rare earth elements such as composition.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Application 60-033229 publications
Patent document 2：Japanese Unexamined Patent Publication 2005-179142 publications
Patent document 3：Japanese Unexamined Patent Application 60-131845 publications
Patent document 4：Japanese Unexamined Patent Publication 2006-137645 publications
Patent document 5：Japanese Unexamined Patent Publication 2007-022846 publications
Patent document 6：Japanese Unexamined Patent Publication 2007-112697 publications
The content of the invention
Problems to be solved by the invention
However, for the optical glass of patent document 1~6, in the glass with high index of refraction, although having low color
Dissipate, but partial dispersion, than big, it is insufficient that the lens as correction said second spectrum, which use,.That is, it needs to high refraction
Rate (nd) and big Abbe number (νd) and the small optical glass of partial dispersion ratio (θ g, F).
The present invention makes in view of the above problems, it is intended that obtaining refractive index (nd) and Abbe number (νd) in mesh
In the range of mark, can be preferred for chromatic aberation correction optical glass, and use its lens preform.
The solution used to solve the problem
Deep experimental study has been repeated in order to solve above-mentioned problem in the present inventor etc., as a result finds, by
B2O3Composition and rare earth elements (use Ln2O3Composition represent) in TiO is applied in combination2Composition and Nb2O5Composition, can be had
There are high index of refraction and low dispersion and partial dispersion is than transparent high and low liquidus temperature glass small, to visible ray, from
And complete the present invention.Specifically, the present invention provides following technical scheme.
(1) a kind of optical glass, wherein, relative to the glass gross mass formed to be converted with oxide, in terms of quality %,
Contain 1.0~31.0% B2O3Composition and 18.0~65.0% Ln2O3Composition, TiO2The content of composition be less than 30.0%,
Nb2O5The content of composition is less than 30.0%.
(2) optical glass according to (1), wherein, the mass ratio Ln formed to be converted with oxide2O3/TiO2For
More than 3.00 (in formula, Ln is selected from one or more of the group being made up of La, Gd, Y, Yb, Lu element).
(3) optical glass according to (1) or (2), wherein, relative to the total matter of the glass formed to be converted with oxide
Amount, in terms of quality %, contains 18.0~60.0% La2O3Composition.
(4) optical glass according to any one of (1)~(3), wherein, formed relative to what is converted with oxide
Glass gross mass, quality and (TiO2+Nb2O5) it is more than 8.0% and less than 35.0%.
(5) optical glass according to any one of (1)~(4), wherein, formed relative to what is converted with oxide
Glass gross mass, in terms of quality %,
SiO2Composition be 0~20.0%, and/or
ZrO2Composition is 0~15.0%.
(6) according to the optical glass described in (5), wherein, relative to the glass gross mass formed to be converted with oxide, with
Quality % is counted, and contains more than 1.0% SiO2Composition.
(7) optical glass according to (5) or (6), wherein, relative to the total matter of the glass formed to be converted with oxide
Amount, in terms of quality %, contains more than 3.0% ZrO2Composition.
(8) optical glass according to any one of (1)~(7), wherein, formed relative to what is converted with oxide
Glass gross mass, in terms of quality %,
GeO2Composition be 0~10.0%, and/or
Ta2O5Composition is 0~20.0%.
(9) according to the optical glass described in (8), wherein, with the mass ratio (GeO in the forming of oxide conversion2+
Ta2O5)/(TiO2+Nb2O5) it is less than 1.00.
(10) optical glass according to any one of (1)~(9), wherein, relative to the group to be converted with oxide
Into glass gross mass, quality and (Nb2O5+Ta2O5) it is more than 3.0% and less than 30.0%.
(11) according to the optical glass described in any one of (1)~(10), wherein, with the forming of oxide conversion
Mass ratio TiO2/(Nb2O5+Ta2O5) it is more than 0.80.
(12) optical glass according to any one of (1)~(11), wherein, relative to the group to be converted with oxide
Into glass gross mass, in terms of quality %,
WO3Composition be 0~10.0%, and/or
SnO2Composition is 0~5.0%.
(13) according to the optical glass described in (12), wherein, relative to the glass gross mass formed to be converted with oxide,
Contain the WO more than 0.5%3Composition.
(14) optical glass according to any one of (1)~(13), wherein, relative to the group to be converted with oxide
Into glass gross mass, in terms of quality %,
Gd2O3Composition be 0~30.0%, and/or
Y2O3Composition be 0~20.0%, and/or
Yb2O3Composition be 0~6.0%, and/or
Lu2O3Composition is 0~6.0%.
(15) optical glass according to any one of (1)~(14), wherein, relative to the group to be converted with oxide
Into glass gross mass, in terms of quality %,
MgO compositions be 0~15.0%, and/or
CaO compositions be 0~15.0%, and/or
SrO compositions be 0~15.0%, and/or
BaO compositions be 0~35.0%, and/or
ZnO component is 0~15.0%.
(16) according to the optical glass described in (15), wherein, relative to the glass gross mass formed to be converted with oxide,
The quality of RO compositions (in formula, R be selected from one or more of the group being made up of Mg, Ca, Sr, Ba element) and be 35.0% with
Under.
(17) optical glass according to any one of (1)~(16), wherein, relative to the group to be converted with oxide
Into glass gross mass, in terms of quality %,
Li2O compositions be 0~15.0%, and/or
Na2O compositions be 0~15.0%, and/or
K2O compositions are 0~15.0%.
(18) according to the optical glass described in (17), wherein, relative to the glass gross mass formed to be converted with oxide,
Rn2The quality of O compositions (in formula, Rn be selected from one or more of the group being made up of Li, Na, K element) and be less than 10.0%.
(19) optical glass according to any one of (1)~(18), wherein, relative to the group to be converted with oxide
Into glass gross mass, in terms of quality %,
P2O5Composition be 0~10.0%, and/or
Bi2O3Composition be 0~10.0%, and/or
TeO2Composition be 0~10.0%, and/or
Al2O3Composition be 0~10.0%, and/or
Ga2O3Composition be 0~10.0%, and/or
Sb2O3Composition is 0~1.0%.
(20) optical glass according to any one of (1)~(19), it has more than 1.80 refractive index (nd),
And with more than 22 and less than 30 Abbe number (νd)。
(21) optical glass according to any one of (1)~(20), it has less than 0.615 partial dispersion ratio
(θ g, F).
(22) a kind of preform material, it is formed as the optical glass described in any one of (1)~(21).
(23) a kind of optical element, its be by the preform material described in (22) it is compressing and make.
(24) a kind of optical element, it is using the optical glass described in any one of (1)~(21) as mother metal.
(25) a kind of optical instrument, it possesses the optical element described in any one of (23) or (24).
The effect of invention
In accordance with the invention it is possible to obtain refractive index (nd) and Abbe number (νd) in target zone, chromatic aberation can be preferred for
Correction and the high optical glass of devitrification resistance, and preform and optical element using the optical glass.
Brief description of the drawings
Fig. 1 is to show that with partial dispersion ratio (θ g, F) be the longitudinal axis, represented by the rectangular co-ordinate that Abbe number (ν d) is transverse axis
The figure of normal line.
Embodiment
On the optical glass of the present invention, relative to the glass gross mass formed to be converted with oxide, in terms of quality %,
Contain 1.0~31.0% B2O3Composition and 40.0~65.0% Ln2O3Composition, TiO2The content of composition be less than 30.0%,
Nb2O5The content of composition is less than 30.0%.B is contained by the scope with defined content2O3Composition and rare earth elements
(Ln2O3Composition), the partial dispersion ratio of glass diminishes, and the transparency of visible ray is improved.In addition, containing with increase
The TiO of the effect of dispersion2Composition and Nb2O5In the case of composition, by containing reduce the strong rare earth element of effect of dispersion into
Point, it can also obtain the optical glass with high index of refraction and low dispersion, and the liquidus temperature step-down of glass.Therefore, it is possible to
Obtain refractive index (nd) and Abbe number (νd) within the limits prescribed, can be preferred for chromatic aberation correction and devitrification resistance it is high
Optical glass, and preform and optical element using the optical glass.
Hereinafter, the embodiment of the optical glass of the present invention is described in detail.The present invention is not by following embodiment party
Any restriction of formula, can suitably it be changed in the range of the purpose of the present invention to implement.It should be noted that for explanation weight
Multiple place, is suitably omitted the description sometimes, but is not the purport for limiting invention.
[glass ingredient]
Explanation forms the compositing range of each composition of the optical glass of the present invention below.In this manual, in no spy
Do not mentionlet alone it is bright in the case of, the content of each composition with the quality % relative to the glass gross mass formed to be converted with oxide come
Represent.Here, refer to " using forming for oxide conversion " assuming that what the raw material as glass constituent of the invention used
Oxide, complex salt, metal fluoride etc. all decomposed in melting and in the case of becoming and turning to oxide, with the oxygen of the generation
Composition obtained from each composition that the gross mass of compound is 100 mass % to represent contained in glass.
＜ is on neccessary composition, any condition ＞
B2O3Composition is to form network structure, the composition for promoting stable glass to be formed in inside glass.Especially by making
B2O3The content of composition is more than 1.0%, reduces the liquidus temperature of glass, it is difficult to devitrification, can be readily derived stabilization
Glass.On the other hand, by making B2O3The content of composition is less than 31.0%, and refractive index becomes to be difficult to reduce, therefore, it is possible to hold
Change places to obtain targeted refractive index.Accordingly, with respect to the glass gross mass formed to be converted with oxide, B2O3The content of composition
Lower limit is preferably 1.0%, more preferably 3.0%, most preferably 5.0%, and its upper limit is preferably 31.0%, is more preferably
25.0%th, it is more preferably 20.0%, is most preferably 14.0%.B2O3Composition can use such as H3BO3、Na2B4O7、
Na2B4O7·10H2O、BPO4It is included in Deng as raw material in glass.
The preferred Ln of optical glass of the present invention2O3(in formula, Ln is in the group being made up of La, Gd, Y, Yb, Lu to composition
More than one elements) content quality and for more than 18.0% and less than 65.0%.Here, by making the quality and being
More than 18.0%, the high index of refraction and lower part dispersion ratio of target can be readily derived, and coloring can be reduced.The opposing party
Face, by making the quality and being less than 65.0%, the reduction of the dispersion of glass can be suppressed and can be reduced because excessive to contain
The devitrification of glass caused by these compositions.Accordingly, with respect to the glass gross mass formed to be converted with oxide, Ln2O3Composition
Content quality sum lower limit be preferably 18.0%, more preferably 30.0%, more preferably 40.0%, be most preferably
45.0%, its upper limit is preferably 65.0%, more preferably 62.0%, most preferably 60.0%.
TiO2Composition is the refractive index and dispersion and the composition for improving the devitrification resistance of glass for improving glass.Especially by
Make TiO2The content of composition is less than 30.0%, can suppress the partial dispersion of glass than rise and make visible ray short wavelength
The light transmittance of (below 500nm) is not easy to be deteriorated.Accordingly, with respect to the glass gross mass formed to be converted with oxide, TiO2Into
The upper limit for the content divided is preferably 30.0%, more preferably 25.0%, more preferably 22.0%, most preferably 20.0%.
TiO2Composition can use such as TiO2It is included in Deng as raw material in glass.On the other hand, by containing TiO2Composition, energy
Access the optical constant and devitrification resistance of target.Accordingly, with respect to the glass gross mass formed to be converted with oxide, TiO2
The lower limit of the content of composition is preferably 5.0%, more preferably 6.6%, more preferably 8.0%, most preferably 10.0%.
Nb2O5Composition is the refractive index and dispersion and the composition for improving the devitrification resistance of glass for improving glass.Especially by
Make Nb2O5The content of composition is less than 30.0%, can suppress to contain Nb because excessive2O5Devitrification and it can press down caused by composition
The partial dispersion of glass processed than rise.Accordingly, with respect to the glass gross mass formed to be converted with oxide, Nb2O5Composition
The upper limit of content is preferably 30.0%, more preferably 25.0%, more preferably 20.0%, most preferably 15.0%.It is another
Aspect, by containing Nb2O5Composition, the optical constant and devitrification resistance of target can be obtained.Changed accordingly, with respect to oxide
The glass gross mass of the composition of calculation, Nb2O5The lower limit of the content of composition is preferably 1.0%, is more preferably 2.0%, further preferably
For 3.0%, most preferably 3.8%.Nb2O5Composition can use such as Nb2O5It is included in Deng as raw material in glass.
For the optical glass of the present invention, it is preferred that Ln2O3The content of composition is relative to TiO2The content of composition
Ratio is more than 3.00.Thereby, it is possible to maintain high index of refraction, reduce the liquidus temperature of glass and improve stability and subtract
Few glass coloration.Therefore, the mass ratio Ln formed to be converted with oxide2O3/TiO2Lower limit be preferably 3.00, more preferably
3.20th, it is most preferably 3.40.On the other hand, the upper limit of the mass ratio is for example mostly less than 10.00, more specifically, is mostly
Less than 8.00, then specifically, mostly less than 6.00.
La2O3Composition is to improve the refractive index of glass and reduce the composition of dispersion.Especially by making La2O3Composition contains
Measure as more than 18.0%, can be readily derived with high index of refraction and lower part dispersion than and to the transmitance of visible ray it is high
Glass.On the other hand, by making La2O3The content of composition is less than 60.0%, can suppress the dispersion of glass beyond needing ground
Reduce and suppress to contain La because excessive2O3The rise of liquidus temperature caused by composition.Converted accordingly, with respect to oxide
Composition glass gross mass, La2O3The lower limit of the content of composition is preferably 18.0%, more preferably 25.0%, and lower limit is further
Preferably 28.0%, it is most preferably 31.0%, its upper limit is preferably 60.0%, more preferably 58.0%, most preferably 55.0%.
La2O3Composition can use such as La2O3、La(NO3)3·XH2O (X is arbitrary integer) etc. is included in glass as raw material
It is interior.
In addition, for the optical glass of the present invention, it is preferred that TiO2Composition and Nb2O5The quality of composition and it is
More than 8.0% and less than 35.0%.Especially by making the quality and for more than 3.0%, the height of target can be readily derived
Refractive index.On the other hand, by making the quality and being less than 35.0%, can suppress caused by excessively containing these compositions
The rise of dispersion simultaneously can suppress the reduction of the stability of glass, further improve the devitrification resistance of glass.Further, since
The partial dispersion of glass than rise be suppressed, accordingly, it is capable to access the lower part dispersion with target than glass.Cause
This, is relative to the glass gross mass formed to be converted with oxide, quality and (TiO2+Nb2O5) lower limit be preferably 8.0%, more
Preferably 11.5%, it is most preferably 15.0%, its upper limit is preferably 35.0%, more preferably 30.0%, most preferably 25.0%.
SiO2Composition be improve melten glass viscosity and reduce glass liquidus temperature, suppress devitrification (crystal
Produce) composition, be the present invention optical glass in any condition.Especially by making SiO2The content of composition is 20.0%
Hereinafter, the melting under high temperature can be avoided, and the reduction of the refractive index of glass can be suppressed.Accordingly, with respect to oxide
The glass gross mass of the composition of conversion, SiO2The upper limit of the content of composition is preferably 20.0%, is more preferably 14.0%, further
Preferably 10.0%, it is most preferably 7.0%.It should be noted that SiO can also not contained2Composition, but by containing SiO2Into
Point, it is possible to increase the devitrification resistance of glass.Accordingly, with respect to the glass gross mass formed to be converted with oxide, SiO2Composition
The lower limit of content be preferably greater than 0%, more preferably 1.0%, more preferably 3.0%, most preferably greater than 4.0%.SiO2
Composition can use such as SiO2、K2SiF6、Na2SiF6It is included in Deng as raw material in glass.
ZrO2Composition is to improve the refractive index of glass, reduce the liquidus temperature of glass and improve the composition of devitrification resistance,
It is any condition in optical glass of the invention.Especially by making ZrO2The content of composition is less than 15.0%, can be pressed down
The reduction of the Abbe number of glass processed and when avoiding glass manufacture at a high temperature of melting, energy damage when reducing glass manufacture
Consumption.Accordingly, with respect to the glass gross mass formed to be converted with oxide, ZrO2The upper limit of the content of composition is preferably
15.0%th, it is more preferably 10.0%, is most preferably 8.0%.It should be noted that ZrO2The content of composition can also be 0%, lead to
Cross containing ZrO2Composition, the liquidus temperature step-down of glass, thereby, it is possible to easily improve devitrification resistance.Accordingly, with respect to
The glass gross mass of the composition of oxide conversion, ZrO2The lower limit of the content of composition is preferably greater than 0%, and more preferably 1.0%, enter
One step is preferably 3.0%, is most preferably 4.2%.ZrO2Composition can use such as ZrO2、ZrF4It is included in Deng as raw material
In glass.
GeO2Composition is the refractive index with raising glass, improves the composition of the effect of devitrification resistance, is the light of the present invention
Learn any condition in glass.But GeO2The cost of material of composition is high, and therefore, when its amount is more, material cost uprises, therefore,
Obtained glass becomes impractical with.Accordingly, with respect to the glass gross mass formed to be converted with oxide, GeO2The content of composition
The upper limit be preferably 10.0%, more preferably 5.0%, more preferably 3.0%, be most preferably 2.0%.GeO2Composition can be with
Use such as GeO2It is included in Deng as raw material in glass.
Ta2O5Composition be improve glass refractive index and reduce glass liquidus temperature, improve devitrification resistance into
Point, it is any condition in optical glass of the invention.Especially by making Ta2O5The content of composition is less than 20.0%, can
Energy loss when reducing the material cost of glass and avoid melting under high temperature, reducing glass manufacture.Accordingly, with respect to
The glass gross mass formed to be converted with oxide, Ta2O5The upper limit of the content of composition is preferably 20.0%, is more preferably
15.0%th, it is more preferably 10.0%, is most preferably 5.0%.Ta2O5Composition can use such as Ta2O5Deng as raw material
In glass.
In addition, for the optical glass of the present invention, it is preferred that GeO2Composition and Ta2O5The quality of composition and relative to
TiO2Composition and Nb2O5The ratio of the quality sum of composition is less than 1.00.Thus, can reduce especially improve refractive index into
Expensive GeO in point2Composition and Ta2O5The content of composition, therefore, it is possible to reduce the material cost of optical glass.Therefore, with oxygen
Mass ratio (GeO in the composition of compound conversion2+Ta2O5)/(TiO2+Nb2O5) the upper limit be preferably 1.00, more preferably 0.80,
Most preferably 0.50.
In addition, for the optical glass of the present invention, it is preferred that Nb2O5Composition and Ta2O5The quality of composition and it is
More than 3.0% and less than 30.0%.By making the quality of these compositions and more than 3.0% and in less than 30.0% scope,
The liquidus temperature step-down of glass, therefore, it is possible to be readily derived the higher optical glass of devitrification resistance.Accordingly, with respect to
The glass gross mass of the composition of oxide conversion, quality and (Nb2O5+Ta2O5) lower limit be preferably 3.0%, more preferably
3.5%th, it is most preferably 3.8%, its upper limit is preferably 30.0%, more preferably 20.0%, most preferably 15.0%.
In addition, for the optical glass of the present invention, it is preferred that TiO2The content of composition is relative to Nb2O5Composition and
Ta2O5The ratio of the content sum of composition is more than 0.80.Thereby, it is possible to improve the stability of glass, further, it is possible to obtain more
High refractive index.Therefore, the mass ratio TiO formed to be converted with oxide2/(Nb2O5+Ta2O5) lower limit be preferably 0.80, more
Preferably 1.20, it is more preferably 1.78.Particularly from the low liquidus temperature side that can easily realize less than 1160 DEG C
Face considers that more preferably lower limit is 2.05.On the other hand, the upper limit of the mass ratio is mostly such as less than 10.00, more specifically,
Mostly less than 8.00, then specifically, mostly less than 5.00.
WO3Composition is to reduce the liquidus temperature of glass, improve the composition of devitrification resistance, and is the refraction for improving glass
Rate and the composition of dispersion, it is any condition in optical glass of the invention.Especially by making WO3The content of composition is
Less than 10.0%, can suppress the partial dispersion of glass than rise and can make visible ray short wavelength's (below 500nm)
Light transmittance is not easy to be deteriorated.Accordingly, with respect to the glass gross mass formed to be converted with oxide, WO3The upper limit of the content of composition
Preferably 10.0%, it is more preferably 7.0%, more preferably 5.0%, most preferably 3.0%.On the other hand, it is preferred that
Relative to the glass gross mass formed to be converted with oxide, WO3The lower limit of the content of composition is preferably greater than 0%, more preferably
0.1%th, it is more preferably 0.5%, is most preferably 0.6%.WO3Composition can use such as WO3It is included in Deng as raw material
In glass.
SnO2Composition is the composition for reducing the oxidation of melten glass and clarifying melten glass, is the optical glass of the present invention
In any condition.Especially by making SnO2The content of composition is less than 5.0%, can be not susceptible to going back because of melten glass
The coloring of glass, the devitrification of glass caused by original.Further, since SnO2Composition and melting equipment (the particularly noble metal such as Pt)
Alloying be reduced, therefore, it is possible to realize the long lifetime of melting equipment.Formed accordingly, with respect to what is converted with oxide
Glass gross mass, SnO2The upper limit of the content of composition is preferably 5.0%, more preferably 3.0%, most preferably 1.5%.Need
Illustrate, SnO2The content of composition can also be 0%, but by containing more than 0.1% SnO2Composition, glass pair can be made
The transmitance of visible ray is not easy to be deteriorated.Accordingly, with respect to the glass gross mass formed to be converted with oxide, SnO2Composition contains
The lower limit of amount is preferably 0.1%, more preferably 0.3%, further preferably content can be more than 0.5%.SnO2Composition can use
Such as SnO, SnO2、SnF2、SnF4It is included in Deng as raw material in glass.
For the optical glass of the present invention, it is preferred that WO3The content of composition is relative to SnO2The ratio of the content of composition
Example is more than 0.1 and less than 3.0.By the way that within the limits prescribed, the ratio set can be obtained into the liquidus curve of low glass
Temperature, and the coloring of glass can be suppressed and improve the permeability of visible ray.Therefore, with oxide conversion form in matter
Amount compares WO3/SnO2Lower limit be preferably 0.1, more preferably 0.3, be most preferably 0.5, its upper limit is preferably 3.0, more preferably
2.5th, it is most preferably 2.0.
Gd2O3Composition is the refractive index for improving glass, the composition for reducing dispersion.Especially by making Gd2O3The content of composition
For less than 30.0%, the split-phase of glass can be suppressed, and when making glass glass can be made to be not easy devitrification.Therefore, relatively
In the glass gross mass formed to be converted with oxide, Gd2O3The upper limit of the content of composition is preferably 30.0%, is more preferably
28.0%th, it is most preferably 25.0%.Gd2O3Composition can use such as Gd2O3、GdF3It is included in Deng as raw material in glass.
Y2O3Composition, Yb2O3Composition and Lu2O3Composition is the refractive index for improving glass, the composition for reducing dispersion.Here, lead to
Crossing makes Y2O3The content of composition is less than 20.0% or makes Yb2O3Composition or Lu2O3The content of composition is less than 6.0%, can be with
Glass is set to be not easy devitrification.Accordingly, with respect to the glass gross mass formed to be converted with oxide, Y2O3The upper limit of the content of composition
Preferably 20.0%, be more preferably 15.0%, more preferably 10.0%, more preferably 9.0%, more preferably
8.0%th, it is more preferably 4.0%, more preferably less than 2.0%.It is in addition, total relative to the glass formed to be converted with oxide
Quality, Yb2O3Composition and Lu2O3The upper limit of the content of composition is respectively preferably 6.0%, is more preferably 2.0%, is further preferred
For 1.5%, most preferably 1.0%.Y2O3Composition, Yb2O3Composition and Lu2O3Composition can use such as Y2O3、YF3、Yb2O3、
Lu2O3It is included in Deng as raw material in glass.
MgO compositions, CaO compositions, SrO compositions and BaO compositions be improve glass meltbility and improve devitrification resistance into
Point, it is any condition in optical glass of the invention.Especially by making in MgO compositions, CaO compositions or SrO compositions
More than one content be respectively less than 15.0%, and/or make BaO compositions content be less than 35.0%, glass can be made
Refractive index is not easy to reduce and makes the liquidus temperature of glass be not easy to raise.Accordingly, with respect to forming of being converted with oxide
Glass gross mass, the upper limit of the content of MgO compositions, CaO compositions and SrO compositions are respectively preferably 15.0%, are more preferably
10.0%th, it is most preferably 6.0%.In addition, relative to the glass gross mass formed to be converted with oxide, the content of BaO compositions
The upper limit be preferably 35.0%, more preferably 20.0%, more preferably 10.0%, be most preferably 6.0%.MgO compositions,
CaO compositions, SrO compositions and BaO compositions can use such as MgCO3、MgF2、CaCO3、CaF2、Sr(NO3)2、SrF2、BaCO3、Ba
(NO3)2It is included in Deng as raw material in glass.
ZnO component is to improve the chemical durability of glass, reduce glass transition temperature and easily form stable glass
Composition, be the present invention optical glass in any condition.Especially by make ZnO component content be less than 15.0%,
The rise of the liquidus temperature of glass can be suppressed, improve devitrification resistance.Accordingly, with respect to the glass formed to be converted with oxide
Glass gross mass, the upper limit of the content of ZnO component is preferably 15.0%, more preferably 10.0%, more preferably 5.5%.It is special
Be not be intended to the photoelastic constant by optical glass suppress relatively low, obtain for optical element when the high glass of color rendering
In the case of, relative to the glass gross mass formed to be converted with oxide, the content of ZnO component can be less than 0.08%.ZnO
Composition can use such as ZnO, ZnF2It is included in Deng as raw material in glass.
For the optical glass of the present invention, it is preferred that (in formula, R is selected from by Mg, Ca, Sr, Ba and Zn to RO compositions
One or more of group of composition element) content quality and for less than 35.0%.Thereby, it is possible to reduce to contain RO because excessive
The devitrification of glass and the refractive index of glass is set to be not easy to reduce caused by composition.Accordingly, with respect to the group to be converted with oxide
Into glass gross mass, the upper limit of the quality sum of the content of RO compositions is preferably 35.0%, more preferably 25.0%, it is further excellent
Elect 15.0% as, be still more preferably 8.0%, most preferably 4.7%.
Li2O compositions be reduce glass partial dispersion than composition, and be improve glass meltbility and reduce glass
Change the composition of transition temperature, be any condition in optical glass of the invention.Especially by making Li2The content of O compositions is
Less than 15.0%, the reduction of the refractive index of glass can be suppressed and make to contain Li because excessive2Devitrification etc. caused by O compositions
It is not susceptible to.Accordingly, with respect to the glass gross mass formed to be converted with oxide, Li2The upper limit of the content of O compositions is preferably
15.0%th, be more preferably 5.0%, more preferably 3.0%, still more preferably be 2.0%.Li2O compositions can be with use example
Such as Li2CO3、LiNO3, LiF etc. is included in glass as raw material.
Na2O compositions are to improve the meltbility of glass and reduce the composition of glass transition temperature, are the optics glass of the present invention
Any condition in glass.Especially by making Na2The content of O compositions is less than 15.0%, can be not easy the refractive index of glass
Reduce and improve the stability of glass, be not susceptible to devitrification etc..Accordingly, with respect to the glass formed to be converted with oxide
Glass gross mass, Na2The upper limit of the content of O compositions is preferably 15.0%, is more preferably 5.0%, is more preferably 3.0%, most
Preferably 2.0%.Na2O compositions can use such as Na2CO3、NaNO3、NaF、Na2SiF6Glass is included in Deng as raw material
It is interior.
K2O compositions are to improve the meltbility of glass and reduce the composition of glass transition temperature, are the optics glass of the present invention
Any condition in glass.Especially by making K2The content of O compositions is 15.0%, can suppress the partial dispersion of glass than liter
It is high.In addition, by making K2The content of O compositions is less than 15.0%, and the refractive index of glass can be made to be not easy to reduce and improve glass
The stability of glass, it is not susceptible to devitrification etc..Accordingly, with respect to the glass gross mass formed to be converted with oxide, K2O compositions
Content the upper limit be preferably 15.0%, more preferably 5.0%, more preferably 3.0%, be most preferably 2.0%.K2O into
Such as K can be used by dividing2CO3、KNO3、KF、KHF2、K2SiF6It is included in Deng as raw material in glass.
In the optical glass of the present invention, by making Rn2(in formula, Rn is in the group being made up of Li, Na, K to O compositions
More than one elements) total content be less than 10.0%, the refractive index of glass can be made to be not easy to reduce and improve glass
Stability, the generation for reducing devitrification etc..Accordingly, with respect to the glass gross mass formed to be converted with oxide, Rn2O compositions
The upper limit of quality sum is preferably 10.0%, more preferably 5.0%, most preferably 3.0%.
In addition, for the optical glass of the present invention, it is preferred that B2O3Composition, ZnO component, WO3Composition and Li2O into
Point quality and for more than 3.0% and less than 30.0%.By making their quality and being more than 3.0%, glass transition temperature
Step-down is spent, accordingly, it is capable to access the glass being easily pressed.On the other hand, by make the quality and for 30.0% with
Under, the rise of the liquidus temperature of glass can be suppressed, therefore, it is possible to be readily derived the higher glass of devitrification resistance.Therefore,
Relative to the glass gross mass formed to be converted with oxide, quality and (B2O3+ZnO+WO3+Li2O lower limit) is preferably
3.0%th, it is more preferably 5.0%, is most preferably 7.0%, its upper limit is preferably 30.0%, is more preferably 20.0%, is most preferably
18.0%.
In addition, in the optical glass of the present invention, it is preferred that B2O3Composition, ZnO component, WO3Composition and Li2O compositions
Quality and relative to SiO2Composition, GeO2Composition, Ta2O5Composition and Nb2O5The ratio of the quality sum of composition be more than 0.50 and
It is 5.00 following.By making the ratio be more than 0.5, relative to the composition for improving glass transition temperature, glass transition is reduced
The content increase of the composition of temperature, therefore, it is possible to be readily derived the lower glass of glass transition temperature.On the other hand, lead to
Crossing makes the ratio be less than 5.00, can easily improve the devitrification resistance of glass.Therefore, forming with oxide conversion
Mass ratio (B2O3+ZnO+WO3+Li2O)/(SiO2+GeO2+Ta2O5+Nb2O5) lower limit be preferably 0.50, more preferably 0.55,
Most preferably 0.60, its upper limit is preferably 5.00, more preferably 4.00, more preferably 3.00, most preferably 2.00.
P2O5Composition is with the liquidus temperature for reducing glass and improves the composition of the effect of devitrification resistance, is the present invention
Optical glass in any condition.Especially by making P2O5The content of composition is less than 10.0%, can suppress the change of glass
Learn the reduction of durability, particularly water resistance.Accordingly, with respect to the glass gross mass formed to be converted with oxide, P2O5Composition
Content the upper limit be preferably 10.0%, more preferably 8.0%, be most preferably 5.0%.P2O5Composition can use such as Al
(PO3)3、Ca(PO3)2、Ba(PO3)2、BPO4、H3PO4It is included in Deng as raw material in glass.
Bi2O3Composition is to improve the refractive index of glass and reduce the composition of glass transition temperature, is the optics glass of the present invention
Any condition in glass.Especially by making Bi2O3The content of composition is less than 10.0%, can suppress the devitrification resistance of glass
Deterioration, partial dispersion than rise, and the light transmittance of visible ray short wavelength (below 500nm) can be made to be not easy to be deteriorated.Cause
This, relative to the glass gross mass formed to be converted with oxide, Bi2O3The upper limit of the content of composition is preferably 10.0%, more excellent
Elect 5.0% as, be most preferably 3.0%.Bi2O3Composition can use such as Bi2O3It is included in Deng as raw material in glass.
TeO2Composition is the composition for improving refractive index, is any condition in optical glass of the invention.But TeO2Deposit
Following the problem of：Frit is melted in the fusion tank that crucible in platinum, the part contacted with melten glass are formed by platinum
, can be with platinum alloy when melting, thus, crucible, the intensity of fusion tank, heat resistance are easily deteriorated.Changed accordingly, with respect to oxide
The glass gross mass of the composition of calculation, TeO2The upper limit of the containing ratio of composition is preferably 10.0%, more preferably the upper limit be 8.0%,
Most preferably 5.0%.TeO2Composition can use such as TeO2It is included in Deng as raw material in glass.
Al2O3Composition is the easy glass for forming stabilization and improves the composition of the chemical durability of glass.Especially by making
Al2O3The content of composition is less than 10.0%, can suppress the deterioration of the devitrification resistance of glass.Changed accordingly, with respect to oxide
The glass gross mass of the composition of calculation, Al2O3The upper limit of the content of composition is preferably 10.0%, is more preferably 5.0%, is most preferably
2.0%.Al2O3Composition can use such as Al2O3、Al(OH)3、AlF3It is included in Deng as raw material in glass.
Ga2O3Composition is the easy glass for forming stabilization and improves the composition of refractive index, is in optical glass of the invention
Any condition.Especially by making Ga2O3The content of composition is respectively less than 10.0%, can suppress glass Abbe number reduce,
And reduce the material cost of glass.Accordingly, with respect to the glass gross mass formed to be converted with oxide, Ga2O3The content of composition
The upper limit be respectively preferably 10.0%, more preferably 5.0%, be most preferably 2.0%.Ga2O3Composition can use such as Ga2O3、
Ga(OH)3It is included in Deng as raw material in glass.
Sb2O3Composition is the composition for defoaming melten glass, is any condition in optical glass of the invention.Particularly
By making Sb2O3The content of composition is less than 1.0%, can be not susceptible to excessive foaming during glass melting, Sb2O3Composition
It is not easy and melting equipment (the particularly noble metal such as Pt) alloying.It is total accordingly, with respect to the glass formed to be converted with oxide
Quality, Sb2O3The upper limit of the content of composition is preferably 1.0%, more preferably 0.8%, most preferably 0.5%.Sb2O3Composition can
To use such as Sb2O3、Sb2O5、Na2H2Sb2O7·5H2O etc. is included in glass as raw material.
It should be noted that the composition for making glass clarifying and defoaming is not limited to above-mentioned Sb2O3Composition, it can use
Known fining agent, defoamer or combinations thereof in glass manufacturing area.Now, Sb2O3Composition, CeO2Composition etc. defoams
The upper limit of the summation of the content of agent is preferably 1.0%, more preferably 0.8%, most preferably 0.5%.Particularly from can be easy
From the viewpoint of ground obtains the glass few to the load of environment, the summation of the content of defoamer can be made to be less than 0.1%.
＜ is on the composition ＞ that should not contain
Then, the composition that should not contain in the optical glass of the present invention and the composition not preferably comprised are illustrated.
, can be in the range of the characteristic of glass of the present application not be damaged according to need in the optical glass of the present invention
Add other compositions.Wherein, GeO2The dispersivity of glass is improved into branch, it is therefore preferable that containing substantially no.
In addition, each mistake such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo in addition to Ti, Zr, Nb, W, La, Gd, Y, Yb, Lu
Crossing metal ingredient has even in independent or compound containing can also make glass coloration, the spy in visible region in the case of a small amount of
The property absorbed is produced at fixed wavelength, it is therefore, preferred real particularly in the optical glass using the wavelength of visible region
Them are not included in matter.
And then the lead compound such as PbO and As2O3Deng arsenic compound and Th, Cd, Tl, Os, Be, Se each composition in recent years
To have the tendency of to control and use as harmful chemical substance, not only the manufacturing process of glass, connects manufacturing procedure and product
Processing after change is also required to the disposal in environmental cure.Therefore, in the case where focusing on influence environmentally, except inevitable
Outside being mixed into, them are preferably contained substantially no.Thus, the material of pollution environment is contained substantially no in optical glass.Cause
This, even if not taking the disposal in special environmental cure, can also manufacture the optical glass and be processed and discard.
For the glass composition of the present invention, it is formed with relative to the glass gross mass formed to be converted with oxide
Quality % represent, therefore, be not directly to be formed with what mole % record represented, but as required by the present invention is met
Various characteristics glass composition present in each composition the composition meter that is converted to oxide of the composition that represents of mole %,
Substantially following value.
B2O32.0~55.0mol% of composition,
TiO2Composition be more than 0mol%~55.0mol% and
Nb2O5Composition be more than 0mol%~20.0mol% and
La2O30~30.0mol% of composition, and/or
SiO20~50.0mol% of composition, and/or
ZrO20~20.0mol% of composition, and/or
GeO20~10.0mol% of composition, and/or
Ta2O50~7.0mol% of composition, and/or
WO30~7.0mol% of composition, and/or
SnO20~5.0mol% of composition, and/or
Gd2O30~12.0mol% of composition, and/or
Y2O30~20.0mol% of composition, and/or
Yb2O30~3.0mol% of composition, and/or
Lu2O30~3.0mol% of composition, and/or
0~45.0mol% of MgO compositions, and/or
0~35.0mol% of CaO compositions, and/or
0~30.0mol% of SrO compositions, and/or
0~50.0mol% of BaO compositions, and/or
0~30.0mol% of ZnO component, and/or
Li20~55.0mol% of O compositions, and/or
Na20~40.0mol% of O compositions, and/or
K20~30.0mol% of O compositions, and/or
P2O50~15.0mol% of composition, and/or
Bi2O30~3.0mol% of composition, and/or
TeO20~10.0mol% of composition, and/or
Al2O30~20.0mol% of composition, and/or
Ga2O30~10.0mol% of composition, and/or
Sb2O30~0.5mol% of composition
[manufacture method]
The optical glass of the present invention for example operates to make as follows.That is, with each composition in the range of defined content
Above-mentioned raw materials are well mixed by mode, and obtained mixture is put into platinum crucible, silica crucible or alumina crucible and carried out slightly
After melting, put into golden crucible, platinum crucible, platinum alloy crucibles or iridium crucible, 1200~1500 DEG C temperature ranges melting 3~
5 hours, stirring, carry out after defoaming etc., be down to less than 1200 DEG C of temperature, then, carry out post-processing stirring, remove bar
Line, shaped using shaping dies, thus made.
[physical property]
The optical glass of the present invention is preferably with defined high index of refraction and with low dispersion (high Abbe number).It is more specific and
Speech, the refractive index (n of optical glass of the inventiond) lower limit be preferably 1.80, more preferably 1.85, more preferably
1.90th, it is most preferably 1.95.On the other hand, to the refractive index (n of optical glass of the inventiond) the upper limit be not particularly limited,
Mostly below substantially 2.20, more specifically, mostly less than 2.10, then specifically, mostly less than 2.05.It is in addition, of the invention
Optical glass Abbe number (νd) lower limit be preferably 22, more preferably 24, be most preferably 26.On the other hand, to the present invention
Optical glass Abbe number (νd) the upper limit be not particularly limited, mostly below substantially 30.Thus, the free degree of optical design
Widen, and then, it can also obtain the amount of refraction of big light even if the slimming of element is sought.
In addition, the optical glass of the present invention has lower part dispersion ratio (θ g, F).More specifically, optics glass of the invention
Glass has less than 0.615 partial dispersion ratio (θ g, F).Thereby, it is possible to obtain in the region of high-refractivity and low-dispersion and part
Dispersion is than small optical glass, therefore, it is possible to reduce the chromatic aberation of the optical element formed by the optical glass.Here, optics
The upper limit of the partial dispersion ratio (θ g, F) of glass is preferably 0.615, more preferably 0.610, most preferably 0.605.On the other hand,
The lower limit of the partial dispersion ratio (θ g, F) of the optical glass of the present invention is not particularly limited, mostly more than substantially 0.585, more
For body, mostly more than 0.588, then specifically, mostly more than 0.590.
The partial dispersion ratio (θ g, F) of the optical glass of the present invention is can standard based on the industry of Japanese Optical nitre
JOGIS01-2003 measure.It should be noted that the glass used in this measure uses is set to -25 by slow cooling cooling rate
DEG C/the hr, glass that is handled with leer.
In addition, the preferred coloring of the optical glass of the present invention is few.Particularly for the optical glass of the present invention, with glass
When transmitance represents, the wavelength (λ of spectrophotometric transmittance 70% is represented in thickness 10mm sample70) it is below 520nm, more preferably
Below 500nm, most preferably below 480nm.In addition, for the optical glass of the present invention, represented in thickness 10mm sample
Wavelength (the λ of spectrophotometric transmittance 5%5) it is below 420nm, more preferably below 400nm, most preferably below 380nm.Thus,
The absorption edge of glass is located near UV light region, it is seen that the transparency of the glass in light region is improved, and therefore, can be incited somebody to action
The optical glass is used as the material of the optical elements such as lens.
The transmitance of the optical glass of the present invention is determined based on Japanese Optical nitre industry meeting standard JOGIS02.Specifically
For, 200~800nm spectrophotometric transmittance is determined to 10 ± 0.1mm of thickness opposed parallel grinding object based on JISZ8722, is asked
Go out λ70(wavelength during transmitance 70%) and λ5(wavelength during transmitance 5%).
In addition, the preferred devitrification resistance of the optical glass of the present invention is high.Particularly optical glass of the invention preferably has
Less than 1240 DEG C of low liquidus temperature.More specifically, the upper limit of the liquidus temperature of optical glass of the invention is preferably
1240 DEG C, more preferably 1200 DEG C, more preferably 1180 DEG C, most preferably 1160 DEG C.Thus, the stability of glass obtains
Improve, crystallization is reduced, and therefore, it is possible to improve devitrification resistance when glass is formed by molten condition, can be reduced to using glass
The influence of the optical characteristics of the optical element of glass.On the other hand, do not have to the lower limit of the liquidus temperature of the optical glass of the present invention
It is particularly limited to, the liquidus temperature of the glass obtained by the present invention is mostly more than substantially 500 DEG C, specifically, mostly 550 DEG C
More than, more specifically, mostly more than 600 DEG C.
The liquidus temperature of the optical glass of the present invention is obtained as follows：, will in the platinum crucible of 50ml capacity
The glass specimen of 30cc cullet shape is added in platinum crucible, it is changed into molten condition completely at 1350 DEG C, be cooled to from
With the arbitrary temp of 10 DEG C of interval settings between 1300 DEG C to 1000 DEG C, kept for 12 hours, taken out to outside stove, after being cooled down,
The presence or absence of crystallization in sight glass surface and glass immediately, obtained by the minimum temperature for not having to find to crystallize during the observation.
It should be noted that the present invention optical glass devitrification resistance remove by above-mentioned liquidus temperature obtain with
Outside, can also be obtained by following insulation experiment：Frit is added in 50cc platinum crucible, 1200 DEG C~1400
DEG C stove in melt 120 minutes or so, after stirring, obtained glass is being set as protecting in 1000~1150 DEG C of stove
Hold 10 hours, the crystallization separated out on the surface and inside of sight glass and the face contacted with the inwall of crucible.
[preform and optical element]
The means of the die forming such as being made shape, precise press molding in hot repressing can be used by obtained optical glass
Make glass shaping body.I.e., it is possible to make the preform of die forming by optical glass, reheating is carried out to the preform
After compressing, be ground processing, make glass shaping body, or, such as prepared by being ground processing it is preforming
Base carries out precise press molding, makes glass shaping body.It should be noted that the means for making glass shaping body are not limited to this
A little means.
Thus the glass shaping body made is useful to various optical elements, wherein, it is especially preferred for use in lens, prism
Deng the purposes of optical element.Thus, it is possible to reduce the optics system for being provided with optical element through light because chromatic aberation causes
Color bleeding.Therefore, when the optical element being used for into camera, photography target thing can be more accurately showed, by the light
Element is learned when being used for projector, being capable of projection target image more in high-precision.
Embodiment
The composition and these glass of embodiments of the invention (No.1~No.63) and reference example (No.1~No.3)
Refractive index (nd) and Abbe number (νd), partial dispersion ratio (θ g, F), transmitance 70% when wavelength (λ70) [nm], transmitance 5%
When wavelength (λ5) value of [nm] and liquidus temperature [DEG C] is shown in 1~table of table 9.It should be noted that following embodiment is only
Only it is in order at the purpose of illustration and enumerates, the present invention is not by any restriction of these embodiments.
The glass of embodiments of the invention (No.1~No.63) and reference example (No.1~No.3) makes as follows：
As the raw material of each composition, select respective oxide, hydroxide, carbonate, nitrate, fluoride, hydroxide,
Metaphosphoric acid compound etc. is generally used for the high-purity raw of optical glass, with as each embodiment shown in 1~table of table 9 and reference
The mode of the proportion of composing of example weighs, and uniformly after mixing, puts into platinum crucible, the melting difficulty formed according to glass, electricity consumption
Stove melts 3~5 hours in 1200~1500 DEG C of temperature range, stirring, defoams etc., then, is cast in mould,
Slow cooling, make glass.
Here, the refractive index (n of the glass of embodiment (No.1~No.63) and reference example (No.1~No.3)d) and Abbe
Number (νd) and partial dispersion ratio (θ g, F) based on the industry of Japanese Optical nitre can standard JOGIS01-2003 determine.Need to illustrate
, the glass that uses in this measure uses is set to -25 DEG C/hr, the glass handled with leer by slow cooling cooling rate
Glass.
In addition, on embodiment (No.1~No.63) and the transmitance of the glass of reference example (No.1~No.3), based on day
The industry of this optics nitre understands standard JOGIS02 to determine.It should be noted that in the present invention, by the transmission for determining glass
Rate, obtain the presence or absence of glass coloration and degree.Specifically, based on JISZ8722, the opposed of 10 ± 0.1mm of thickness parallel is ground
Mill product determine 200~800nm spectrophotometric transmittance, obtain wavelength (λ during transmitance 70%70) and λ5(ripple during transmitance 5%
It is long).
In addition, the liquidus temperature of the glass of embodiment (No.1~No.63) and reference example (No.1~No.3) is asked as follows
Go out：In the platinum crucible of 50ml capacity, the glass specimen of 30cc cullet shape is added into platinum crucible, makes it at 1350 DEG C
Molten condition is gone completely into, is cooled between 1300 DEG C~1000 DEG C with the arbitrary temp of 10 DEG C of interval settings, is kept for 12 hours,
Take out to outside stove, after being cooled down, the presence or absence of crystallization in sight glass surface and glass immediately, by not found during the observation
The minimum temperature of crystallization is obtained.
[table 1]
[table 2]
[table 3]
[table 4]
[table 5]
[table 6]
[table 7]
[table 8]
[table 9]
Abbe number (the ν of the optical glass of embodiments of the inventiond) it is less than 30, also, the Abbe number (νd) it is 22
Above, it is more specifically more than 28, in target zone.
In addition, the partial dispersion ratio (θ g, F) of the optical glass of embodiments of the invention is less than 0.615, more specifically
For less than 0.604.Thus, it can be known that the optical glass of embodiments of the invention has low dispersion, and partial dispersion ratio (θ g, F)
Small, chromatic aberation when can make to form optical element is small.
In addition, refractive index (the n of the optical glass of embodiments of the inventiond) it is more than 1.90, more specifically, be
More than 1.98, also, the refractive index (nd) it is less than 2.20, it is less than 2.01, in target zone more specifically.
In addition, the λ of the optical glass of embodiments of the invention70(wavelength during transmitance 70%) is below 520nm, more
Specifically, it is below 487nm.In addition, the λ of the optical glass of embodiments of the invention5(wavelength during transmitance 5%) is equal
It is below 379nm, in target zone more specifically for below 420nm.And the λ of the glass of reference example (No.1)70For
501nm.Thus, it can be known that the optical glass of embodiments of the invention is compared with reference example (No.1) glass, to the saturating of visible ray
Rate height is crossed, coloring is also few.
In addition, the liquidus temperature of the optical glass of embodiments of the invention is less than 1240 DEG C, more specifically,
For less than 1220 DEG C, also, the liquidus temperature is more than 500 DEG C, in target zone.And reference example (No.2~No.3)
The liquidus temperature of glass is 1300 DEG C, and with particular reference to the glass of example (No.2), there occurs devitrification.Thus, it can be known that the present invention
For the optical glass of embodiment compared with reference example (No.2~No.3) glass, devitrification resistance is high.
Thus, it can be known that refractive index (the n of the optical glass of embodiments of the inventiond) and Abbe number (νd) in target zone,
Chromatic aberation is small, high to the transparency of the light of the wavelength of visible region, and devitrification resistance is high.
And then it is compressing using the optical glass obtained in embodiments of the invention to have carried out reheating, then, carries out
Grinding and grinding, it is processed into the shape of lens and prism.In addition, using the optical glass of embodiments of the invention, essence is formd
It is close it is compressing use preform, precise press molding processing has been carried out with preform to precise press molding.In any feelings
Under condition, the problems such as glass after heating and softening is without occurring opalization and devitrification, can stably be processed into various lens and
The shape of prism.
The present invention is described in detail with the purpose of illustration above, but the present embodiment is merely for the sake of the purpose of illustration
And enumerate, those skilled in the art can carry out various changes in the case where not departing from the thought and scope of the present invention.
Claims (15)
1. a kind of optical glass, wherein, relative to the glass gross mass formed to be converted with oxide, in terms of quality %, contain
1.0~31.0% B2O3Composition and 40.0~65.0% Ln2O3Composition, TiO2The content of composition is less than 30.0%, Nb2O5
The content of composition is less than 30.0%,
B2O3Composition, ZnO component, WO3Composition and Li2The quality of O compositions and for more than 3.0% and less than 20.0%,
Relative to the glass gross mass formed to be converted with oxide, the quality of RO compositions and it is less than 0.950%, in formula, R is
Selected from one or more of the group being made up of Mg, Ca, Sr, Ba element,
As is not contained2O3Composition.
2. optical glass according to claim 1, wherein, the mass ratio Ln formed to be converted with oxide2O3/TiO2For
More than 3.00, in formula, Ln is selected from one or more of the group being made up of La, Gd, Y, Yb, Lu element.
3. optical glass according to claim 1, wherein, relative to the glass gross mass formed to be converted with oxide,
In terms of quality %, contain 18.0~60.0% La2O3Composition.
4. optical glass according to claim 1, wherein, relative to the glass gross mass formed to be converted with oxide,
Quality and (TiO2+Nb2O5) it is more than 8.0% and less than 35.0%.
5. optical glass according to claim 1, wherein, relative to the glass gross mass formed to be converted with oxide,
In terms of quality %, also containing following each composition：
0~20.0% SiO2Composition, and/or
0~15.0% ZrO2Composition.
6. optical glass according to claim 1, wherein, relative to the glass gross mass formed to be converted with oxide,
In terms of quality %,
GeO2Composition be 0~10.0%, and/or
Ta2O5Composition be 0~20.0%, and/or
WO3Composition be 0~10.0%, and/or
SnO2Composition be 0~5.0%, and/or
Gd2O3Composition be 0~30.0%, and/or
Y2O3Composition be 0~20.0%, and/or
Yb2O3Composition be 0~6.0%, and/or
Lu2O3Composition be 0~6.0%, and/or
Li2O compositions be 0~15.0%, and/or
Na2O compositions be 0~15.0%, and/or
K2O compositions be 0~15.0%, and/or
P2O5Composition be 0~10.0%, and/or
Bi2O3Composition be 0~10.0%, and/or
TeO2Composition be 0~10.0%, and/or
Al2O3Composition be 0~10.0%, and/or
Ga2O3Composition be 0~10.0%, and/or
Sb2O3Composition is 0~1.0%.
7. optical glass according to claim 1, wherein, with the mass ratio (GeO in the forming of oxide conversion2+
Ta2O5)/(TiO2+Nb2O5) it is less than 1.00.
8. optical glass according to claim 1, wherein, relative to the glass gross mass formed to be converted with oxide,
Quality and (Nb2O5+Ta2O5) it is more than 3.0% and less than 30.0%.
9. optical glass according to claim 1, wherein, with the mass ratio TiO in the forming of oxide conversion2/(Nb2O5
+Ta2O5) it is more than 0.80.
10. optical glass according to claim 1, wherein, relative to the glass gross mass formed to be converted with oxide,
Rn2The quality of O compositions and for less than 10.0%, in formula, Rn is selected from one or more of the group being made up of Li, Na, K element.
11. optical glass according to claim 1, it has more than 1.80 refractive index (nd), and with more than 22 and 30
Following Abbe number (νd)。
12. optical glass according to claim 1, it has less than 0.615 partial dispersion ratio (θ g, F).
13. a kind of preform material, it is formed as the optical glass described in any one of claim 1~12.
14. a kind of optical element, it is using the optical glass described in any one of claim 1~12 as mother metal.
15. a kind of optical instrument, it possesses the optical element described in any one of claim 13 or 14.
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| JP2011-008253 | 2011-01-18 | ||
| JP2011008253 | 2011-01-18 | ||
| CN2012800055094A CN103313947A (en) | 2011-01-18 | 2012-01-18 | Optical glass, preform, and optical element |
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| JP6136009B2 (en) * | 2013-07-16 | 2017-05-31 | 日本電気硝子株式会社 | Optical glass |
| JP6509525B2 (en) * | 2014-10-30 | 2019-05-08 | 株式会社オハラ | Optical glass, preform and optical element |
| JP6763303B2 (en) * | 2014-11-12 | 2020-09-30 | 日本電気硝子株式会社 | Resin composition for three-dimensional modeling, manufacturing method of three-dimensional modeling and inorganic filler particles |
| JP6400461B2 (en) * | 2014-12-18 | 2018-10-03 | 光ガラス株式会社 | Optical glass, optical element using optical glass, optical device |
| EP3505499B1 (en) * | 2016-08-26 | 2023-12-13 | The University Of Tokyo | Optical glass, optical element formed of optical glass, and optical device |
| EP3643690A4 (en) | 2017-06-23 | 2021-03-17 | AGC Inc. | OPTICAL GLASS AND OPTICAL COMPONENT |
| TWI795418B (en) * | 2017-07-21 | 2023-03-11 | 日商小原股份有限公司 | Optical glass, preforms and optical components |
| JP7325927B2 (en) * | 2017-12-27 | 2023-08-15 | 株式会社オハラ | Optical glass, preforms and optical elements |
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| WO2021205927A1 (en) * | 2020-04-06 | 2021-10-14 | 日本電気硝子株式会社 | Optical glass |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012099168A1 (en) | 2012-07-26 |
| JP6230210B2 (en) | 2017-11-15 |
| TW201236993A (en) | 2012-09-16 |
| TWI545098B (en) | 2016-08-11 |
| CN103313947A (en) | 2013-09-18 |
| JP2017145192A (en) | 2017-08-24 |
| JP2012162448A (en) | 2012-08-30 |
| JP6594374B2 (en) | 2019-10-23 |
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