WO2022138299A1 - フツリン酸ガラス及び近赤外線カットフィルタ - Google Patents
フツリン酸ガラス及び近赤外線カットフィルタ Download PDFInfo
- Publication number
- WO2022138299A1 WO2022138299A1 PCT/JP2021/045905 JP2021045905W WO2022138299A1 WO 2022138299 A1 WO2022138299 A1 WO 2022138299A1 JP 2021045905 W JP2021045905 W JP 2021045905W WO 2022138299 A1 WO2022138299 A1 WO 2022138299A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- content
- less
- modulus
- young
- Prior art date
Links
- 239000005303 fluorophosphate glass Substances 0.000 title abstract 2
- 150000001768 cations Chemical class 0.000 claims abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 7
- 238000002834 transmittance Methods 0.000 claims description 28
- 239000005388 borosilicate glass Substances 0.000 claims description 16
- 150000001450 anions Chemical class 0.000 claims description 13
- 239000011521 glass Substances 0.000 description 146
- 239000011575 calcium Substances 0.000 description 24
- 238000004031 devitrification Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 20
- 239000011777 magnesium Substances 0.000 description 20
- 239000010408 film Substances 0.000 description 18
- 239000010949 copper Substances 0.000 description 17
- 230000001965 increasing effect Effects 0.000 description 17
- 239000002994 raw material Substances 0.000 description 14
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- -1 nitrate compound Chemical class 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 10
- 230000000087 stabilizing effect Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 229910005690 GdF 3 Inorganic materials 0.000 description 2
- 229910013553 LiNO Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000008395 clarifying agent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000007496 glass forming Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- 229910016036 BaF 2 Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910012258 LiPO Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- TYYRFZAVEXQXSN-UHFFFAOYSA-H aluminium sulfate hexadecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O TYYRFZAVEXQXSN-UHFFFAOYSA-H 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 238000001444 catalytic combustion detection Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 125000005341 metaphosphate group Chemical group 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 description 1
- 229910001637 strontium fluoride Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/23—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron
- C03C3/247—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron containing fluorine and phosphorus
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
Definitions
- the present invention relates to futhuric acid glass used in a color correction filter for a digital still camera, a color video camera, etc., and a near-infrared cut filter using the glass.
- Solid-state image sensors such as CCDs and CMOSs used in digital still cameras and the like have spectral sensitivities ranging from the visible region to the near-infrared region near 1200 nm. Therefore, since good color reproducibility cannot be obtained as it is, the visibility is corrected by using a near-infrared cut filter glass to which a specific substance that absorbs infrared rays is added.
- a near-infrared cut filter glass an optical glass in which a copper component is added to futuric acid glass has been developed and used so as to selectively absorb wavelengths in the near-infrared region and have high weather resistance.
- the composition of these glasses is disclosed in Patent Document 1.
- An object of the present invention is to provide a borosilicate glass suitable for thinning a plate, which has high strength and suppresses the occurrence of devitrification, and a near-infrared cut filter using the same.
- the present inventors have made the content ratios of the alkali metal component and the alkaline earth metal component within the predetermined ranges in the borosilicate glass, so that the strength is high and devitrification is unlikely to occur. Furthermore, it has been found that a glass having desired optical properties can be obtained.
- the futuric acid glass of one embodiment of the present invention contains P, F, and O as essential components, and Cu 2+ in cation% is 5 to 14% (Ca 2+ content + Ba 2+ content) / ⁇ R 2+ .
- ⁇ R 2+ means the total amount of Ba 2+ , Sr 2+ , Ca 2+ , Mg 2+ ) is 0.75 to 1.0, Li + content / ⁇ R' + ( ⁇ R' + is Li + , Na + The total amount) is 0.75 to 1.0 (however, 1.0 is not included), and the Young's modulus is 70 GPa or more.
- the glass raw material can be melted at a low temperature, and borosilicate glass having desired optical characteristics and a near-infrared cut filter using the same can be obtained. Further, according to the present invention, since the strength of the glass is high, the risk of cracking when the plate is thinned can be reduced.
- FIG. 1 shows a graph of transmittance in Examples and Comparative Examples of the present invention.
- the borosilicate glass of one embodiment of the present invention (hereinafter, also simply referred to as “glass”) contains P, F, and O as essential components, and Cu 2+ in% cation is 5 to 14% (Ca 2+ ).
- Content + Ba 2+ content) / ⁇ R 2+ ( ⁇ R 2+ means the total amount of Ba 2+ , Sr 2+ , Ca 2+ , Mg 2+ ) is 0.75 to 1.0
- Li + content / ⁇ R' + ( ⁇ R' + means the total amount of Li + and Na + ) is 0.75 to 1.0 (however, 1.0 is not included), and Young's modulus is 70 GPa or more.
- cation% and anion% are the following units.
- the "cation%” is a unit in which the content of each cation component is expressed as a molar percentage when the total content of all cation components contained in the glass is 100 mol%.
- the “anion%” is a unit in which the content of each anion component is expressed as a molar percentage when the total content of all anion components contained in the glass is 100 mol%.
- the content "%" of the component contained in the glass of the present invention is cation% for the cation component and anion% for the anion component unless otherwise specified.
- the glass of this embodiment is a copper-containing borosilicate glass containing P, F, and O as essential components.
- Glass containing P as a main component has an effect of enhancing the cuttability in the near infrared region. Further, the weather resistance can be improved by containing F in the glass.
- the glass of the present embodiment contains 5 to 14% of Cu 2+ , which is a component that imparts near-infrared ray blocking property and improves weather resistance. Further, since Cu 2+ has a property of attracting phosphoric acid chains in glass to form a crosslinked structure, the glass structure is strengthened and Young's modulus is improved. If Cu 2+ is less than 5%, the near-infrared absorption may decrease when the glass is thinned. Cu 2+ is preferably 6% or more, more preferably 8% or more. Further, if Cu 2+ exceeds 14%, the glass becomes unstable and the risk of devitrification increases. Cu 2+ is preferably 12% or less, more preferably 10% or less.
- the glass of the present embodiment has (Ca 2+ content + Ba 2+ content) / ⁇ R 2+ ( ⁇ R 2+ means the total amount of Ba 2+ , Sr 2+ , Ca 2+ , and Mg 2+ ) in% cation. It is set to 1.0.
- R 2+ means Ba 2+ , Sr 2+ , Ca 2+ , Mg 2+
- R 2+ has the effects of stabilizing the glass, increasing Young's modulus, and improving weather resistance.
- ⁇ R 2+ is preferably contained in an amount of 1 to 20%.
- ⁇ R 2+ is preferably 3% or more, more preferably 5% or more.
- ⁇ R 2+ is 20% or less, deterioration of devitrification and the like can be sufficiently suppressed.
- ⁇ R 2+ is preferably 15% or less, more preferably 10% or less.
- the present inventors conducted a solubility test of glass containing Ba 2+ , Sr 2+ , and Ca 2+ , and analyzed foreign substances confirmed in the glass. As a result, crystals containing P, O, Cu, Ba, Sr, and Ca were found. An object was detected. Furthermore, from the glass in which the above crystals were detected, three glasses of Ba only weight reduction, Sr only weight reduction, and Ca only weight reduction were prepared, and a solubility test was conducted. As a result, the glass with only Sr weight reduction had good solubility. It was confirmed that the reduction of Sr 2+ is effective for improving the solubility.
- the present inventors conducted a solubility test of a glass containing Ba 2+ , Ca 2+ , and Mg 2+ , and a glass containing only Mg 2+ from the glass (the content ratio of other components is the same). .. As a result, the glass containing Mg 2+ had poor solubility, and the glass containing only Mg 2+ had good solubility. From these, it was confirmed that the reduction of Mg 2+ is effective for improving the solubility.
- (Content of Ca 2+ + content of Ba 2+ ) / ⁇ R 2+ is preferably 0.8 or more, more preferably 0.86 or more, still more preferably 0.95 or more, and even more preferably 1.0.
- the glass of the present embodiment has a Li + content in% cation / ⁇ R' + ( ⁇ R' + means the total amount of Li + and Na + ) of 0.75 to 1.0 (provided that 1.0 is contained). No).
- Li + and Na + have a larger ion diffusion coefficient than other components, but when both are contained in glass in combination, they have the property of being smaller than the individual ion diffusion coefficients due to the mixed alkali effect. Specifically, since Li + and Na + have different ionic radii, each ion is more likely to be mixed and present in the glass than when each ion is present alone in the glass. It becomes difficult to move. That is, since the mobility of each ion decreases, the ion diffusion coefficient becomes small. In particular, when the ratio of the Li + content to ⁇ R' + is high, the glass is stable and structural relaxation is less likely to occur, so that the Young's modulus is improved.
- the Li + content / ⁇ R' + ( ⁇ R' + means the total amount of Li + and Na + ) is less than 0.75, Young's modulus may decrease.
- the Li + content / ⁇ R' + is preferably 0.78 or more, more preferably 0.8 or more. Further, if the Li + content / ⁇ R' + is 1.0, the Young's modulus may decrease.
- the Li + content / ⁇ R' + is preferably 0.95 or less, more preferably 0.9 or less.
- ⁇ R' + has effects such as stabilizing the glass and lowering the melting temperature of the glass, and is preferably contained in an amount of 20 to 50%. When ⁇ R' + is 20% or more, the effect can be sufficiently obtained. ⁇ R' + is preferably 25% or more, more preferably 30% or more. Further, when ⁇ R' + is 50% or less, the decrease in devitrification can be sufficiently suppressed. ⁇ R' + is preferably 45% or less, more preferably 40% or less.
- P 5+ is a main component (glass-forming oxide) that forms glass, and is an essential component for improving the stability of glass.
- the content of P 5+ is preferably 30 to 60%. When the content of P 5+ is 30% or more, the effect is sufficiently obtained, and when it is 60% or less, the instability of the glass can be sufficiently suppressed and the weather resistance is lowered. It can be sufficiently suppressed.
- the content of P 5+ is more preferably 40 to 60%, still more preferably 40 to 50%.
- Al 3+ may be the main component (glass-forming oxide) that forms glass, and by combining with non-crosslinked oxygen in glass to form a dense glass network, Young's modulus, weather resistance, and chemical durability It is an ingredient that enhances sex.
- the content of Al 3+ is preferably 4 to 20%. When the content of Al 3+ is 4% or more, the effect can be sufficiently obtained, and when it is 20% or less, the risk of devitrification can be sufficiently reduced.
- the content of Al 3+ is more preferably 6 to 15%, still more preferably 6 to 12%.
- Li + is a component for stabilizing the glass and improving Young's modulus.
- the Li + content is preferably 15 to 40%.
- the Li + content is more preferably 20-40%.
- Na + is a component for stabilizing glass.
- the Na + content is preferably 0.1 to 15%.
- the Na + content is preferably 0.1 to 10%, more preferably 0.1 to 6%.
- K + is not an essential component, it is a component for lowering the melting temperature of glass, lowering the liquidus temperature of glass, and the like. However, when K + is contained, it is preferable not to contain it because the strength may decrease.
- Ca 2+ is a component for increasing the Young's modulus of the glass, increasing the weather resistance, and stabilizing the glass.
- the upper limit of the content of Ca 2+ is preferably 10% or less.
- the content of Ca 2+ is more preferably 0 to 6%.
- Ba 2+ is a component for increasing the Young's modulus of the glass, increasing the weather resistance, and stabilizing the glass.
- the upper limit of the content of Ba 2+ is preferably 10% or less.
- the content of Ba 2+ is more preferably 0 to 6%.
- Sr 2+ is not an essential component, it is a component for increasing the Young's modulus of glass and improving the weather resistance.
- the upper limit of the content of Sr 2+ is preferably 5% or less.
- the content of Sr 2+ is more preferably 0 to 2%, and even more preferably not.
- Mg 2+ is not an essential component, it is a component for increasing the Young's modulus of glass and improving the weather resistance.
- the upper limit of the content of Mg 2+ is preferably 5% or less.
- the content of Mg 2+ is 5% or less, the instability of the glass can be sufficiently suppressed, and the deterioration of devitrification can be sufficiently suppressed.
- the content of Mg 2+ is more preferably 0 to 2%, and even more preferably not.
- Zn 2+ is not an essential component, it is a component for increasing the Young's modulus of glass and improving the weather resistance.
- the upper limit of the Zn 2+ content is preferably 10% or less.
- the content of Zn 2+ is more preferably 0 to 5%, still more preferably 0 to 2%.
- the glass of the present embodiment may contain 0 to 1% of Sb 3+ as an arbitrary cationic component.
- Sb 3+ is not an essential component, it has the effect of increasing the visible transmittance.
- the content of Sb 3+ is preferably 0.01 to 0.8%, more preferably 0.05 to 0.5%, and even more preferably 0.1 to 0.3%.
- the glass of the present embodiment can further contain, as an arbitrary cation component, other components such as S, Si, and B that are normally contained in borosilicate glass, as long as the effects of the present invention are not impaired.
- the total content of these components is preferably 5% or less.
- O2- is an essential component for stabilizing the glass, increasing the visible transmittance, enhancing mechanical properties such as strength, hardness and elastic modulus, and reducing the ultraviolet transmittance, and the content is 40-95% is preferable.
- the content of O 2- is 40% or more, the effect is sufficiently obtained, and when it is 95% or less, the instability of the glass can be sufficiently suppressed and the weather resistance is lowered. Can be sufficiently suppressed.
- the content of O 2- is preferably 80 to 95% (however, 80% is not included). In this case, the content of O 2- is more preferably 82 to 93%, still more preferably 85 to 92%.
- the content of O 2- is preferably 40 to 80%.
- the content of O 2- is more preferably 50 to 70%, still more preferably 50 to 60%.
- F - is an essential component for stabilizing glass.
- the content of F ⁇ is preferably 5 to 60%.
- the content of F ⁇ is 5% or more, the generation of unmelted matter when melting the glass raw material can be sufficiently suppressed.
- the content of F ⁇ is 60% or less, the volatility becomes high and the increase of the pulse can be sufficiently suppressed.
- the content of F ⁇ is preferably 5 to 20% (however, it does not contain 20%). In this case, the content of F ⁇ is more preferably 7 to 18%, still more preferably 8 to 15%.
- the content of F ⁇ is preferably 20 to 60%. In this case, the content of F ⁇ is more preferably 30 to 50%, still more preferably 40 to 50%.
- the glass of the present embodiment can further contain other components normally contained in borosilicate glass such as Cl, Br, and I as arbitrary anionic components as long as the effects of the present invention are not impaired.
- the total content of these components is preferably 5% or less.
- substantially not contained means that it is not intentionally used as a raw material, and it is considered that it does not contain raw material components or unavoidable impurities mixed from the manufacturing process.
- the glass of the present embodiment contains substantially none of PbO, As 2 O 3 , V 2 O 5 , YbF 3 , and GdF 3 .
- PbO is a component that lowers the viscosity of glass and improves manufacturing workability.
- As 2 O 3 is a component that acts as an excellent clarifying agent capable of generating a clarifying gas in a wide temperature range.
- PbO and As 2 O 3 are environmentally hazardous substances, it is preferable not to contain them as much as possible.
- V 2 O 5 has absorption in the visible region, it is preferable that V 2 O 5 is not contained as much as possible in the near-infrared cut filter glass for a solid-state image sensor, which is required to have high visible region transmittance.
- YbF 3 and GdF 3 are components that stabilize glass, the raw materials are relatively expensive and lead to cost increase, so it is preferable not to contain them as much as possible.
- substantially not contained means that they are not intentionally used as a raw material, and that the content of each component in the near-infrared cut filter glass is 0.1% or less. do.
- a nitrate compound or a sulfate compound having cations forming the glass can be added as an oxidizing agent or a clarifying agent.
- the oxidant has an effect of improving the visible transmittance and improving the cuttability of near infrared rays by increasing the ratio of Cu 2+ ions in the total amount of Cu in the glass.
- the addition amount thereof is preferably 0.5 to 15% by mass by external split addition with respect to the raw material mixture.
- the amount of the nitrate compound or sulfate compound added is 0.5% by mass or more, the effect of improving the transmittance is likely to be obtained, and when it is 15% by mass or less, the difficulty in forming glass is sufficiently suppressed. Can be done.
- the amount of the nitrate compound or sulfate compound added is more preferably 1 to 10% by mass, and even more preferably 3 to 8% by mass.
- Examples of the nitrate compound include Al (NO 3 ) 3 , LiNO 3 , NaNO 3 , KNO 3 , Ca (NO 3 ) 2 , Sr (NO 3 ) 2 , Ba (NO 3 ) 2 , Zn (NO 3 ) 2 , and Cu.
- Examples of the sulfate compound include Al 2 (SO 4 ) 3.16H 2 O, Li 2 SO 4 , Na 2 SO 4 , K 2 SO 4 , CaSO 4 , SrSO 4 , BaSO 4 , ZnSO 4 , CuSO 4 , and the like. ..
- the glass of the present embodiment is required to have a Young's modulus of 70 GPa or more.
- K 1C fracture toughness
- r fracture energy
- E Young's modulus
- the Young's modulus is less than 70 GPa, problems such as easy cracking when the glass is thinned and easy scratching in the polishing process occur. Therefore, when the glass is used for an image pickup device or the like, it may be damaged. It is preferably 75 GPa or more.
- the glass of the present embodiment preferably has an average transmittance of 80% or more for light having a wavelength of 450 to 600 nm when the plate thickness is 0.1 mm.
- the average transmittance 80% or more, light in the visible region can be sufficiently transmitted, and a clear image can be displayed when used in an image pickup device.
- the wavelength at which the transmittance is 50% is preferably in the range of 600 to 670 nm. Under such conditions, it is possible to realize desired optical characteristics in a sensor that is required to be thin. Further, when the plate thickness is 0.1 mm, the transmittance of light having a wavelength of 400 nm is 85% or more, and the transmittance of light having a wavelength of 1200 nm is 40% or less. It becomes a cut filter.
- the value of the transmittance was converted so as to be the value when the plate thickness was 0.1 mm.
- the conversion of the transmittance was performed using the following formula 1.
- Ti 1 is the internal transmittance of the measurement sample (data excluding the reflection loss on the front and back surfaces)
- t 1 is the plate thickness of the measurement sample (for example, 0.15 to 0.3 mm)
- Ti 2 is the conversion.
- the transmittance of the value, t 2 indicates the plate thickness to be converted (0.1 mm in the case of the present invention).
- the thickness of the glass is preferably 0.5 mm or less, more preferably 0.3 mm or less, still more preferably 0.2 mm or less, and most preferably 0.15 mm or less.
- the lower limit of the glass plate thickness is not particularly limited, but is preferably 0.03 mm or more, more preferably 0.05 mm or more, considering the strength that is not easily damaged during transportation during glass manufacturing or incorporating into an image pickup device. Is.
- the glass of the present embodiment may be formed into a predetermined shape and then provided with an optical multilayer film on at least one surface of the glass to serve as a near-infrared cut filter.
- the optical multilayer film include an IR cut film (a film that reflects near infrared rays), a UV / IR cut film (a film that reflects ultraviolet rays and near infrared rays), a UV cut film (a film that reflects ultraviolet rays), and an antireflection film. can give.
- These optical thin films can be formed by a known method such as a vapor deposition method or a sputtering method.
- An adhesion strengthening film may be provided between the glass and the optical multilayer film.
- the adhesion strengthening film By providing the adhesion strengthening film, the adhesion between the glass and the optical multilayer film is improved, and it becomes possible to suppress the film peeling.
- the adhesion reinforcing film include silicon oxide (SiO 2 ), titanium oxide (TIO 2 ), lanthanum titanate (La 2 Ti 2 O 7 ), aluminum oxide (Al 2 O 3 ), aluminum oxide and zirconium oxide (Al 2 O 3). Examples thereof include a mixture with ZrO 2 ), magnesium fluoride (MgF 2 ), calcium fluoride (CaF 2 ), strontium fluoride (SrF 2 ), and silicone fluoride.
- a substance containing fluorine or oxygen has higher adhesion, and magnesium fluoride and / or titanium oxide has higher adhesion to glass or a film, and is therefore preferable as an adhesion strengthening film.
- the adhesion reinforcing film may be a single layer or two or more layers. In the case of two or more layers, a plurality of substances may be combined.
- the near-infrared cut filter glass of this embodiment can be manufactured as follows.
- the raw materials are weighed and mixed so as to be within the above composition range (mixing step).
- This raw material mixture is housed in a platinum crucible and melted by heating at a temperature of 700 to 900 ° C. in an electric furnace (melting step). After being sufficiently stirred and clarified, it is cast in a mold, cut and polished to form a flat plate having a predetermined wall thickness (molding process).
- the highest temperature of the glass during glass melting it is preferable to set to 900 ° C. or lower. This is because when the highest temperature of the glass during glass melting exceeds the above temperature, the transmittance characteristics deteriorate and the volatilization of fluorine is promoted to make the glass unstable.
- the temperature is more preferably 880 ° C. or lower, further preferably 850 ° C. or lower, and even more preferably 820 ° C. or lower.
- the temperature in the melting step is preferably 750 ° C. or higher, more preferably 800 ° C. or higher.
- Examples and comparative examples of the present invention are shown in Tables 1 to 3. Examples 1 to 10 and Examples 20 to 22 are examples of the present invention, and Examples 11 to 19 are comparative examples of the present invention.
- the raw materials are weighed and mixed so that the glass components have the compositions (cation%, anion%) shown in Tables 1 to 3, and placed in a platinum crucible having an internal volume of about 1 L, at 800 to 900 ° C.
- a platinum crucible having an internal volume of about 1 L, at 800 to 900 ° C.
- After melting, clarifying, and stirring at a temperature of about 50 to 500 ° C. casting into a rectangular mold of length 100 mm ⁇ width 80 mm ⁇ height 20 mm preheated to about 50 to 500 ° C., slowly cooling at 360 to 440 ° C., and about 1 ° C./min.
- the temperature was lowered with a sample.
- the front and back surfaces were optically polished to obtain glass having a plate thickness of 0.15 to 0.3 mm.
- the raw material for each glass is one selected from H 3 PO 4 and Al (PO 3 ) 3 in the case of P 5+ , and Al F 3 , Al (PO 3 ) 3 and Al 2 O 3 in the case of Al 3+ .
- Ba 2+ one selected from BaF 2 , BaCO 3 and Ba (PO 3 ) 2
- Na + one selected from NaCl, NaBr, NaI, NaF and Na (PO 3 ).
- K + and Ca 2+ one selected from fluoride, carbonate and metaphosphate was used, and in the case of Cu 2+ and Cu + , CuO was used.
- the transmittance of light having a wavelength of 350 to 1200 nm was measured with a spectrophotometer (V-570, manufactured by JASCO Corporation). The measurement result was converted into a transmittance having a plate thickness of 0.1 mm by the above-mentioned method.
- Tables 1 to 3 show the transmittances of light at a wavelength of 400 nm, a wavelength of 420 nm, and a wavelength of 1200 nm when converted to a plate thickness of 0.1 mm. Further, from the converted transmittance, the wavelength (IR half value) at which the transmittance in the near infrared region is 50% was calculated. In Examples 13 to 18, the transmittance was not measured because devitrification occurred (described as No Data in Table 2).
- Solubility was evaluated by the following procedure. First, when the glass was melted at 800 to 900 ° C. for 2 hours, the presence or absence of devitrified lumps was visually confirmed in the molten glass. Indicated.
- Young's modulus was measured by ultrasonic pulse method on glass with a plate thickness of 0.15 to 0.3 mm using an ultrasonic thickness gauge (35DL manufactured by Olympus Corporation). The average value of the results of two-point measurement is shown in Tables 1 to 3.
- Example 8 Example
- Example 19 Comparative Example
- the transmittance converted into a plate thickness of 0.1 mm is shown in FIG.
- Example 1 to 10 and Examples 20 to 22 a glass having good optical characteristics, no devitrification (good solubility), and a Young's modulus of 70 GPa or more is used. Obtained.
- Example 12 since the Li + content / ⁇ R' + was less than 0.75, the glass had a low Young's modulus.
- Example 10 The effect of Mg on the solubility was confirmed by the following method. From the glass of Example 18, a glass containing only Mg (Example 10) was prepared, and its solubility was confirmed. As a result, it was suggested that the glass of Example 10 had good solubility, and that reducing the amount of Mg contributed to the improvement of solubility.
- Young's modulus was compared between the glasses of Examples 20 to 22 in which only the Al content was changed (the components other than Al were converted so that the total cation% was 100%). As a result, it was suggested that the Young's modulus of the glass increased as the Al content increased, and that increasing the Al content within a certain range contributed to the improvement of the Young's modulus.
- Examples of the present invention are shown in Table 4. Examples 23 to 29 are examples of the present invention.
- the raw materials are weighed and mixed so that the glass component after melt molding has the composition (cation%, anion%) shown in Table 4, and the glass is placed in a platinum crucible having an internal volume of about 1 L and placed at 800 to 900 ° C.
- a platinum crucible having an internal volume of about 1 L and placed at 800 to 900 ° C.
- the temperature was lowered at ° C./min to prepare a sample.
- the front and back surfaces were optically polished to obtain glass having a plate thickness of 0.15 to 0.3 mm.
- the raw materials for each glass used were those described above.
- the method described above was used as the evaluation method for each item.
- the effect of F content on Young's modulus was confirmed by the following method.
- the Young's modulus was compared between the glasses of Examples 27 to 29 in which the F content was changed by using the same amount of glass raw material and changing only the melting time. As a result, it was suggested that the Young's modulus of the glass increased as the content of F decreased, and that reducing the amount of F within a certain range contributed to the improvement of the Young's modulus.
- the glass composition is difficult to devitrify even when the content of Cu component is large due to the thinning of the plate, and the light transmittance in the visible region is increased by being able to melt at a low temperature, so that the size can be reduced.
- -It is extremely useful for near-infrared cut filter applications of thinning image pickup devices.
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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Abstract
Description
P5+は、ガラスを形成する主成分(ガラス形成酸化物)であり、ガラスの安定性を向上させるための必須成分である。P5+の含有量は、30~60%が好ましい。P5+の含有量が30%以上であることで、その効果が十分得られ、60%以下であることで、ガラスが不安定になることを十分に抑制し得るし、また耐候性の低下を十分に抑制しうる。P5+の含有量は、より好ましくは40~60%、さらに好ましくは40~50%である。
O2-は、ガラスを安定化させるため、可視域透過率を高めるため、強度や硬度や弾性率といった機械的特性を高めるため、紫外線透過率を低下させるための必須成分であり、含有量は40~95%が好ましい。O2-の含有量が、40%以上であることで、その効果が十分得られ、95%以下であることで、ガラスが不安定となることを十分に抑制しうるし、また耐候性の低下を十分に抑制しうる。
これらのガラスは、ガラス成分が表1~表3に示す組成(カチオン%、アニオン%)となるよう原料を秤量・混合し、内容積約1Lの白金ルツボ内に入れて、800~900℃の温度で2時間溶融、清澄、撹拌後、およそ50~500℃に予熱した縦100mm×横80mm×高さ20mmの長方形のモールドに鋳込み後、360~440℃で徐冷し、約1℃/分で降温し、サンプルとした。次いで、表裏面を光学研磨し、板厚0.15~0.3mmのガラスを得た。
分光光度計(日本分光社製、V-570)により波長350~1200nmの光の透過率を測定した。測定結果を、前述の方法で板厚0.1mmの透過率に換算した。表1~表3に、板厚0.1mmに換算した場合の波長400nm、波長420nm、波長1200nmにおける光の透過率を示した。また、換算した透過率から、近赤外線領域における透過率が50%となる波長(IR半値)を算出した。なお、例13~例18は、失透が発生したため、透過率の測定は行っていない(表2において、No Dataと記載)。
これに対し、比較例とした例12については、Li+の含有量/ΣR’+が0.75未満のため、ヤング率が低いガラスとなった。
これらのガラスは、溶融成形後のガラス成分が表4に示す組成(カチオン%、アニオン%)となるよう原料を秤量・混合し、内容積約1Lの白金ルツボ内に入れて、800~900℃の温度で1~4時間溶融、清澄、撹拌後、およそ50~500℃に予熱した縦100mm×横80mm×高さ20mmの長方形のモールドに鋳込み後、360~440℃で徐冷し、約1℃/分で降温し、サンプルとした。次いで、表裏面を光学研磨し、板厚0.15~0.3mmのガラスを得た。
Claims (6)
- P、F、Oを必須成分として含有し、カチオン%における
Cu2+が5~14%、
(Ca2+の含有量+Ba2+の含有量)/ΣR2+(ΣR2+はBa2+、Sr2+、Ca2+、Mg2+の合計量をいう)が0.75~1.0、
Li+の含有量/ΣR’+(ΣR’+はLi+、Na+の合計量をいう)が0.75~1.0(但し、1.0を含まない)、
ヤング率が70GPa以上
であることを特徴とするフツリン酸ガラス。 - Li+の含有量/ΣR’+(ΣR’+はLi+、Na+の合計量をいう)が0.8~0.9であることを特徴とする請求項1記載のフツリン酸ガラス。
- カチオン%で
P5+ 30~60%、
Al3+ 4~20%、
ΣR’+(ΣR’+はLi+、Na+の合計量をいう) 20~50%、
Li+ 15~40%、
Na+ 0.1~15%、
ΣR2+(ΣR2+はBa2+、Sr2+、Ca2+、Mg2+の合計量をいう) 1~20%、
Mg2+ 0~5%、
Ca2+ 0~10%、
Sr2+ 0~5%、
Ba2+ 0~10%、
Cu2+ 5~14%、
アニオン%で
F- 20~60%、
O2- 40~80%、
を含有することを特徴とする、請求項1又は2記載のフツリン酸ガラス。 - カチオン%で
P5+ 30~60%、
Al3+ 4~20%、
ΣR’+(ΣR’+はLi+、Na+の合計量をいう) 20~50%、
Li+ 15~40%、
Na+ 0.1~15%、
ΣR2+(ΣR2+はBa2+、Sr2+、Ca2+、Mg2+の合計量をいう) 1~20%、
Mg2+ 0~5%、
Ca2+ 0~10%、
Sr2+ 0~5%、
Ba2+ 0~10%、
Cu2+ 5~14%、
アニオン%で
F- 5~20%(ただし、20%を含まない)、
O2- 80~95%(ただし、80%を含まない)、
を含有することを特徴とする、請求項1又は2記載のフツリン酸ガラス。 - 板厚0.1mmにおいて、
透過率が50%となる波長が600~670nmの範囲内であり、
波長400nmにおける光の透過率が85%以上、
波長1200nmにおける光の透過率が40%以下
であることを特徴とする請求項1~4のいずれか1項記載のフツリン酸ガラス。 - 請求項1~5のいずれか1項記載のフツリン酸ガラスからなる近赤外線カットフィルタ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180087320.3A CN116710412A (zh) | 2020-12-25 | 2021-12-13 | 氟磷酸盐玻璃和近红外线截止滤光片 |
JP2022572181A JPWO2022138299A1 (ja) | 2020-12-25 | 2021-12-13 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020217105 | 2020-12-25 | ||
JP2020-217105 | 2020-12-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022138299A1 true WO2022138299A1 (ja) | 2022-06-30 |
Family
ID=82159615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/045905 WO2022138299A1 (ja) | 2020-12-25 | 2021-12-13 | フツリン酸ガラス及び近赤外線カットフィルタ |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPWO2022138299A1 (ja) |
CN (1) | CN116710412A (ja) |
TW (1) | TW202231594A (ja) |
WO (1) | WO2022138299A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014119780A1 (ja) * | 2013-02-04 | 2014-08-07 | 旭硝子株式会社 | ガラス基板の切断方法、ガラス基板、近赤外線カットフィルタガラス、ガラス基板の製造方法 |
WO2015156163A1 (ja) * | 2014-04-09 | 2015-10-15 | 旭硝子株式会社 | 近赤外線カットフィルタガラス |
WO2016152561A1 (ja) * | 2015-03-24 | 2016-09-29 | 旭硝子株式会社 | 近赤外線カットフィルタガラス |
JP2018106171A (ja) * | 2016-12-26 | 2018-07-05 | 旭硝子株式会社 | 近赤外線カットフィルタガラス及び近赤外線カットフィルタ |
WO2019044563A1 (ja) * | 2017-08-31 | 2019-03-07 | Agc株式会社 | ガラス |
-
2021
- 2021-12-13 JP JP2022572181A patent/JPWO2022138299A1/ja active Pending
- 2021-12-13 WO PCT/JP2021/045905 patent/WO2022138299A1/ja active Application Filing
- 2021-12-13 CN CN202180087320.3A patent/CN116710412A/zh active Pending
- 2021-12-20 TW TW110147737A patent/TW202231594A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014119780A1 (ja) * | 2013-02-04 | 2014-08-07 | 旭硝子株式会社 | ガラス基板の切断方法、ガラス基板、近赤外線カットフィルタガラス、ガラス基板の製造方法 |
WO2015156163A1 (ja) * | 2014-04-09 | 2015-10-15 | 旭硝子株式会社 | 近赤外線カットフィルタガラス |
WO2016152561A1 (ja) * | 2015-03-24 | 2016-09-29 | 旭硝子株式会社 | 近赤外線カットフィルタガラス |
JP2018106171A (ja) * | 2016-12-26 | 2018-07-05 | 旭硝子株式会社 | 近赤外線カットフィルタガラス及び近赤外線カットフィルタ |
WO2019044563A1 (ja) * | 2017-08-31 | 2019-03-07 | Agc株式会社 | ガラス |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022138299A1 (ja) | 2022-06-30 |
TW202231594A (zh) | 2022-08-16 |
CN116710412A (zh) | 2023-09-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20120241697A1 (en) | Near infrared cut filter glass | |
JP6332916B2 (ja) | 着色ガラス | |
JP7024711B2 (ja) | 光学ガラスおよび近赤外線カットフィルタ | |
TW201803821A (zh) | 光學玻璃及光學元件 | |
TWI612019B (zh) | 光學玻璃、預成形體及光學元件 | |
WO2011118724A1 (ja) | 近赤外線カットフィルタガラスの製造方法 | |
WO2011046155A1 (ja) | 近赤外線カットフィルタガラス | |
JP7076192B2 (ja) | 光学ガラス、プリフォーム材及び光学素子 | |
TW202313501A (zh) | 光學玻璃、預成形體及光學元件 | |
CN115259656A (zh) | 光学玻璃、预成型体及光学元件 | |
JP6992494B2 (ja) | 近赤外線カットフィルタガラス及び近赤外線カットフィルタ | |
US10150693B2 (en) | Near infrared cutoff filter glass | |
JP2016074558A (ja) | 光学ガラス及び光学素子 | |
JP6687027B2 (ja) | 近赤外線カットフィルタガラス | |
WO2022138299A1 (ja) | フツリン酸ガラス及び近赤外線カットフィルタ | |
JP6962322B2 (ja) | 近赤外線カットフィルタガラス | |
WO2019031095A1 (ja) | 光学ガラス、光学素子及び光学機器 | |
TW201817691A (zh) | 光學玻璃、預成形體以及光學元件 | |
JP7456563B2 (ja) | 光学フィルタ用ガラス及び光学フィルタ | |
JP2003160358A (ja) | 近赤外線カットフィルタガラス | |
JP2018058715A (ja) | 光学ガラス、光学ガラスを用いた光学素子、光学装置 | |
JP2023092517A (ja) | 高屈折率を有する光学ガラス | |
TWI542562B (zh) | Optical glass, preform and optical element |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21910448 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022572181 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180087320.3 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21910448 Country of ref document: EP Kind code of ref document: A1 |