WO2020017275A1 - Verre optique, préforme et élément optique - Google Patents

Verre optique, préforme et élément optique Download PDF

Info

Publication number
WO2020017275A1
WO2020017275A1 PCT/JP2019/025752 JP2019025752W WO2020017275A1 WO 2020017275 A1 WO2020017275 A1 WO 2020017275A1 JP 2019025752 W JP2019025752 W JP 2019025752W WO 2020017275 A1 WO2020017275 A1 WO 2020017275A1
Authority
WO
WIPO (PCT)
Prior art keywords
less
component
glass
optical
mass
Prior art date
Application number
PCT/JP2019/025752
Other languages
English (en)
Japanese (ja)
Inventor
浄行 桃野
Original Assignee
株式会社オハラ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社オハラ filed Critical 株式会社オハラ
Priority to JP2020531208A priority Critical patent/JP7424978B2/ja
Priority to CN201980047359.5A priority patent/CN112424135A/zh
Publication of WO2020017275A1 publication Critical patent/WO2020017275A1/fr

Links

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
    • C03C3/04—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
    • C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses

Definitions

  • the present invention relates to an optical glass, a preform, and an optical element.
  • optical glasses for producing an optical element in particular, it has a refractive index ( nd ) of 1.70 or more, and an Abbe number ( ⁇ d ) of 35 or more and 55 or less, which can reduce the size of the entire optical system.
  • nd refractive index
  • ⁇ d Abbe number
  • Patent Document 1 a glass composition represented by Patent Document 1 is known.
  • the stability of the glass may be insufficient, and it has been demanded to enhance the stability.
  • glass that has been devitrified when the glass is manufactured is liable to be clouded when polishing a glass formed by press using a reheat press or when manufacturing a preform material by polishing the glass.
  • the present invention has been made in view of the above-described problems, and has as its object the purpose of polishing by polishing while the refractive index (n d ) and Abbe number ( ⁇ d ) are within desired ranges.
  • An object of the present invention is to obtain a stable optical glass in which a reforming material and an optical element can be easily manufactured.
  • the inventors of the present invention have conducted intensive tests and studies. As a result, the glass containing the SiO 2 component, the B 2 O 3 component, the La 2 O 3 component, and the Al 2 O 3 component was refracted. while there rate (n d) and Abbe number ([nu d) is within a desired range, chemical durability, particularly susceptible perform polishing for high acid resistance, it found that stable glass can be obtained,
  • the present invention has been completed. Specifically, the present invention provides the following.
  • SiO 2 component more than 0% and 35.0% or less SiO 2 component more than 0% and 35.0% or less, B 2 O 3 component more than 0% and 35.0% or less, La 2 O 3 component more than 20.0% and 65.0% or less, Al 2 O 3 component more than 0% and 30.0% or less, Contains Has 1.70 or more of refractive index (n d), has a 35 to 55 following the Abbe number ( ⁇ d), An optical glass having a chemical durability (acid resistance) of a class 1 to 4 by a powder method.
  • Ln 2 O 3 components where Ln is at least one selected from the group consisting of La, Gd, Y, Yb, and Lu
  • a sum of contents of RO components (where R is at least one selected from the group consisting of Mg, Ca, Sr, Ba, and Zn) is 0 to less than 10.0%
  • Any of (1) to (5), wherein the sum of the contents of Rn 2 O components (where Rn is at least one selected from the group consisting of Li, Na, and K) is 0 to less than 10.0%;
  • Ln 2 O 3 / (SiO 2 + B 2 O 3 + Al 2 O 3 ) is more than 0.30 and not more than 10.00.
  • Ln is at least one selected from the group consisting of La, Gd, Y, and Yb).
  • a preform comprising the optical glass according to any one of (1) to (7).
  • An optical element comprising the optical glass according to any one of (1) to (7).
  • the refractive index (n d) and Abbe number ([nu d) is while remaining within the desired range, easy to perform the production of a preform or an optical element by grinding, to obtain a stable optical glass Can be.
  • the SiO 2 component is more than 0% to 35.0% or less
  • the B 2 O 3 component is more than 0% to 35.0% or less
  • the La 2 O 3 component is more than 20.0% by mass%.
  • the Al 2 O 3 component contained less 0% and 30.0% has 1.70 or more of refractive index (n d), 35 or more 55 or less of Abbe number ([nu d) And has a chemical durability (acid resistance) of 1 to 4 in the powder method.
  • the present inventor has, SiO 2 component, the B 2 O 3 component and La 2 O 3 component as a base, when it is contained the Al 2 O 3 component to 1.70 or more refractive index (n d) and A stable glass having high Abs number ( ⁇ d ) of 35 or more and 55 or less and high chemical durability, particularly high acid resistance, can be obtained. Therefore, the refractive index (n d) and Abbe number ([nu d) is while remaining within the desired range, easy to perform the production of a preform or an optical element according to a high polishing acid resistance, to obtain a stable optical glass Can be.
  • the optical glass of the present invention can contribute to weight reduction of an optical element and an optical device due to its low specific gravity.
  • each component constituting the optical glass of the present invention The composition range of each component constituting the optical glass of the present invention will be described below.
  • the content of each component is expressed in terms of% by mass with respect to the total mass of the oxide-converted composition.
  • the ⁇ oxide-equivalent composition '' refers to an oxide, a composite salt, a metal fluoride, and the like used as a raw material of the glass component of the present invention, when it is assumed that all are decomposed at the time of melting and change to an oxide.
  • the composition is a composition in which each component contained in the glass is described, with the total mass of the generated oxide being 100% by mass.
  • the SiO 2 component is an essential component as a glass-forming oxide.
  • it is a component that can improve the chemical durability of the glass, especially the acid resistance, and also enhances the stability of the glass to make it easier to obtain a glass that can withstand mass production. Further, the viscosity of the molten glass can be increased, and the coloring of the glass can be reduced. Therefore, the content of the SiO 2 component is preferably more than 0%, more preferably more than 1.0%, still more preferably more than 3.0%, still more preferably more than 5.0%, and even more preferably 7.0%. More than, more preferably more than 10.0%.
  • the content of the SiO 2 component is preferably 35.0% or less, more preferably less than 30.0%, further preferably less than 27.0%, further preferably less than 24.0%, and still more preferably 21.0%. Less than 0%, more preferably less than 18.0%.
  • the B 2 O 3 component is an essential component as a glass-forming oxide.
  • the content of the B 2 O 3 component is preferably more than 0%, more preferably more than 1.0%, still more preferably more than 4.0%, still more preferably more than 5.0%, and even more preferably 7. More than 0%, more preferably more than 10.0%.
  • the content of the B 2 O 3 component is set to 35.0% or less, a higher refractive index can be easily obtained, and deterioration of chemical durability, particularly deterioration of acid resistance can be suppressed.
  • the content of the B 2 O 3 component is preferably 35.0% or less, more preferably less than 30.0%, further preferably less than 27.0%, further preferably less than 25.0%, and still more preferably. It is less than 20.0%, more preferably less than 18.0%, and still more preferably less than 15.0%.
  • the La 2 O 3 component is an essential component for increasing the refractive index and Abbe number of glass. Moreover, since the rare earth is relatively inexpensive, the material cost of the glass can be reduced. Therefore, the content of the La 2 O 3 component is preferably more than 20.0%, more preferably more than 25.0%, furthermore preferably more than 28.0%, still more preferably more than 30.0%, and still more preferably. The content is more than 35.0%, more preferably more than 37.0%, further preferably more than 40.0%. On the other hand, by setting the content of the La 2 O 3 component to 65.0% or less, destabilization can be reduced by increasing the stability of the glass. Further, the melting property of the glass raw material can be improved.
  • the content of the La 2 O 3 component is preferably at most 65.0%, more preferably less than 60.0%, further preferably less than 58.0%, further preferably less than 55.0%, further preferably less than 55.0%. It is less than 53.0%, more preferably less than 50.0%.
  • the Al 2 O 3 component is an essential component that can improve the chemical durability of the glass, especially the acid resistance, and the devitrification resistance of the glass. Therefore, the content of the Al 2 O 3 component is preferably more than 0%, more preferably more than 1.0%, further preferably more than 2.0%, further preferably more than 3.0%, and still more preferably 5. More than 0%. On the other hand, by setting the content of the Al 2 O 3 component to 30.0% or less, the liquidus temperature of the glass can be lowered and the devitrification resistance can be increased. Therefore, the content of the Al 2 O 3 component is preferably 30.0% or less, more preferably less than 25.0%, further preferably less than 20.0%, further preferably less than 15.0%, and still more preferably. Is less than 13.0%.
  • the Y 2 O 3 component is an optional component that can suppress the material cost of the glass and reduce the specific gravity of the glass while maintaining a high refractive index and a high Abbe number when containing more than 0%. Therefore, the content of the Y 2 O 3 component is preferably more than 0%, more preferably more than 1.0%, further preferably more than 5.0%, further preferably more than 8.0%, and still more preferably 10. It may be more than 0%. On the other hand, when the content of the Y 2 O 3 component is less than 25.0%, a decrease in the refractive index of the glass can be suppressed, and the stability of the glass can be increased. Further, the deterioration of the melting property of the glass raw material can be suppressed. Therefore, the content of the Y 2 O 3 component is preferably less than 25.0%, more preferably less than 20.0%, further preferably less than 18.0%, and still more preferably less than 16.0%.
  • the Gd 2 O 3 component is an optional component that can increase the refractive index and Abbe number of glass when containing more than 0%.
  • the raw material price of the Gd 2 O 3 component is high, and if the content is high, the production cost increases and the specific gravity of the glass increases. Therefore, the content of the Gd 2 O 3 component is preferably less than 40.0%, more preferably less than 30.0%, further preferably less than 20.0%, and still more preferably less than 10.0%.
  • the Yb 2 O 3 component and the Lu 2 O 3 component are optional components that can increase the refractive index and Abbe number of the glass when containing more than 0%.
  • the Yb 2 O 3 component and the Lu 2 O 3 component have a high raw material price, and if the content is large, the production cost increases and the specific gravity of the glass increases. Therefore, the content of each of the Yb 2 O 3 component and the Lu 2 O 3 component is preferably less than 10.0%, more preferably less than 7.0%, further preferably less than 4.0%, and still more preferably 1. Less than 0%. In particular, from the viewpoint of reducing material costs, it is most preferable not to contain these components.
  • the MgO component, the CaO component, the SrO component and the BaO component are optional components that can adjust the refractive index, melting property, and devitrification resistance of the glass when containing more than 0%.
  • the content of each of the MgO component, CaO component, SrO component and BaO component is less than 10.0%, a decrease in the refractive index can be suppressed, and devitrification due to excessive content of these components. Can be reduced. Therefore, the content of each of the MgO component, the CaO component, the SrO component, and the BaO component is preferably less than 10.0%, more preferably less than 5.0%, still more preferably 3.0% or less, and further preferably 1. Less than 0%. Particularly, from the viewpoint of obtaining a glass having a high refractive index, it is most preferable not to contain these components.
  • the Li 2 O component is an optional component that can improve the melting property of the glass and lower the glass transition point when it contains more than 0%.
  • the content of the Li 2 O component is preferably less than 5.0%, more preferably less than 3.0%, further preferably less than 1.0%, further preferably less than 0.5%, and still more preferably 0%. 0.3% or less.
  • the Na 2 O component and the K 2 O component are optional components that can improve the melting property of the glass and lower the glass transition point when containing more than 0%.
  • the content of each of the Na 2 O component and the K 2 O component is less than 10.0%, the refractive index of the glass is hardly reduced, and the devitrification of the glass can be reduced. Therefore, the content of each of the Na 2 O component and the K 2 O component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably 1.0%. , More preferably less than 0.5%.
  • the TiO 2 component is an optional component that increases the refractive index of the glass and lowers the liquidus temperature of the glass to increase the stability. It is also a component that reduces the specific gravity of glass.
  • the content of the TiO 2 component is less than 15.0%, the devitrification due to the excessive content of the TiO 2 component can be reduced, and the transmittance of the glass to visible light (particularly, a wavelength of 500 nm or less) can be reduced. Can be suppressed.
  • a decrease in the Abbe number can be suppressed. Therefore, the content of the TiO 2 component is preferably less than 15.0%, more preferably less than 10.0%, further preferably less than 8.0%, still more preferably 5.0% or less, and further preferably 3.0% or less. 0% or less.
  • the Nb 2 O 5 component is an optional component that, when contained more than 0%, can increase the refractive index of the glass and lower the liquidus temperature of the glass to increase the devitrification resistance. Therefore, the content of the Nb 2 O 5 component may be preferably more than 0%, more preferably more than 1.0%, and even more preferably more than 2.0%. On the other hand, by setting the content of the Nb 2 O 5 component to less than 15.0%, the material cost of the glass can be suppressed, and the decrease in Abbe number can be suppressed. In addition, devitrification due to excessive Nb 2 O 5 content can be reduced, and a decrease in transmittance of glass with respect to visible light (particularly, a wavelength of 500 nm or less) can be suppressed. Therefore, the content of the Nb 2 O 5 component is preferably less than 15.0%, more preferably less than 12.0%, and still more preferably less than 10.0%.
  • the ZrO 2 component is an optional component that, when contained at more than 0%, can increase the refractive index and Abbe number of the glass and improve the devitrification resistance. Therefore, the content of the ZrO 2 component may be preferably more than 0%, more preferably more than 1.0%, and still more preferably more than 1.5%. On the other hand, when the content of the ZrO 2 component is less than 15.0%, devitrification due to excessive content of the ZrO 2 component can be reduced. Therefore, the content of the ZrO 2 component is preferably less than 15.0%, more preferably less than 12.0%, further preferably less than 10.0%, and still more preferably less than 7.0%.
  • the Ta 2 O 5 component is an optional component that, when contained in more than 0%, can increase the refractive index of the glass and increase the devitrification resistance.
  • the Ta 2 O 5 component has a high raw material price, and a high content thereof increases the production cost.
  • the content of the Ta 2 O 5 component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%.
  • the WO 3 component contains more than 0%, an optional component that can increase the refractive index, lower the glass transition point, and increase the devitrification resistance while reducing coloring of the glass due to other high refractive index components. It is. Therefore, the content of WO 3 ingredient is preferably 0 percent, more preferably from 0.3%, even more preferably may be 0.5% greater. On the other hand, by the content of WO 3 components below 10.0%, it suppressed the material cost of the glass, suppressing a decrease in the Abbe number. Also, it increased visible light transmittance to reduce the coloration of the glass due WO 3 components. Therefore, the content of WO 3 component is preferably less than 10.0%, more preferably less than 5.0%, more preferably less than 3.0%, more preferably less than 1.0%.
  • the ZnO component is an optional component that can enhance the stability of the glass and reduce the coloring when contained in an amount exceeding 0%. It is also a component that can lower the glass transition point and improve chemical durability.
  • the content of the ZnO component is less than 30.0%, a decrease in the refractive index of the glass can be suppressed, and devitrification due to an excessive decrease in the viscosity can be reduced. Therefore, the content of the ZnO component is preferably less than 30.0%, more preferably less than 25.0%, further preferably less than 22.0%, further preferably less than 20.0%, and still more preferably 15.0%. %, More preferably less than 10.0%.
  • the P 2 O 5 component is an optional component that can act as a glass-forming component and, when contained in more than 0%, can lower the liquidus temperature of the glass and increase the devitrification resistance.
  • the content of the P 2 O 5 component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%.
  • the GeO 2 component is an optional component that can increase the refractive index of the glass and improve the devitrification resistance when contained more than 0%.
  • GeO 2 has a high raw material price, and a high content thereof increases production costs. Therefore, the content of the GeO 2 component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%. In particular, from the viewpoint of reducing material costs, it is not necessary to contain the GeO 2 component.
  • the Ga 2 O 3 component is an optional component that can improve the chemical durability of the glass and improve the devitrification resistance of the glass when containing more than 0%.
  • the content of the Ga 2 O 3 component is less than 10.0%, the liquidus temperature of the glass can be lowered and the devitrification resistance can be increased. Therefore, the content of the Ga 2 O 3 component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%.
  • the Bi 2 O 3 component is an optional component that can increase the refractive index and lower the glass transition point when containing more than 0%.
  • the content of the Bi 2 O 3 component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%.
  • the TeO 2 component is an optional component that can increase the refractive index and lower the glass transition point when containing more than 0%.
  • TeO 2 can be alloyed with platinum when melting a glass raw material in a platinum crucible or a melting tank in which a portion in contact with the molten glass is formed of platinum. Therefore, the content of the TeO 2 component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%.
  • the SnO 2 component is an optional component that, when contained in more than 0%, can reduce the oxidization of the molten glass to clarify it and increase the visible light transmittance of the glass.
  • the content of the SnO 2 component is less than 3.0%, coloring of the glass due to reduction of the molten glass and devitrification of the glass can be reduced.
  • the alloying of the SnO 2 component and the melting equipment particularly, a noble metal such as Pt
  • the content of the SnO 2 component is preferably less than 3.0%, more preferably less than 1.0%, further preferably less than 0.5%, and still more preferably less than 0.1%.
  • the Sb 2 O 3 component is an optional component capable of defoaming the molten glass when containing more than 0%.
  • the content of the Sb 2 O 3 component is preferably less than 1.0%, more preferably less than 0.5%, and still more preferably less than 0.3%.
  • the component for clarifying and defoaming the glass is not limited to the above-mentioned Sb 2 O 3 component, and a known fining agent, defoaming agent or a combination thereof in the field of glass production can be used.
  • the F component is an optional component that, when contained at more than 0%, can increase the Abbe number of the glass, lower the glass transition point, and improve the devitrification resistance.
  • the content of the F component that is, the total amount of the fluorides substituted with part or all of one or more oxides of the above-described metal elements as F exceeds 10.0%, Since the volatilization amount of the component is large, it is difficult to obtain a stable optical constant, and it is difficult to obtain a homogeneous glass. Therefore, the content of the F component is preferably less than 10.0%, more preferably less than 5.0%, further preferably less than 3.0%, and still more preferably less than 1.0%.
  • the ratio (mass ratio) of the content of the SiO 2 component to the content of the B 2 O 3 component is preferably from 0.15 to 10.00.
  • the stability of the glass can be enhanced, and the chemical durability, particularly, the acid resistance of the glass can be improved.
  • the glass of the present invention can be vitrified even when the content of the B 2 O 3 component is relatively small and the content of the SiO 2 component is relatively large. Therefore, the mass ratio SiO 2 / B 2 O 3 is preferably at least 0.15, more preferably at least 0.30, further preferably at least 0.50, further preferably at least 0.60, further preferably at least 0.70. The above may be used.
  • the mass ratio SiO 2 / B 2 O 3 is preferably 10.00 or less, more preferably 7.00 or less, further preferably 5.00 or less, and further preferably 4.65 or less.
  • the sum (mass sum) of the contents of the B 2 O 3 component and the SiO 2 component is preferably from 15.0% to 40.0%.
  • the mass sum B 2 O 3 + SiO 2 is preferably 15.0% or more, more preferably more than 18.0%, and further preferably 20.0% or more.
  • this sum 40.0% or less a decrease in the refractive index due to excessive inclusion of these components can be suppressed. Further, the chemical durability of the glass, particularly the acid resistance, can be improved.
  • the mass sum B 2 O 3 + SiO 2 is preferably 40.0% or less, more preferably less than 38.0%, further preferably less than 35.0%, further preferably less than 32.0%, further preferably less than 32.0%. It is less than 30.0%.
  • the sum (mass sum) of the contents of the B 2 O 3 component, the SiO 2 component, and the Al 2 O 3 component is preferably 15.0% or more and less than 50.0%. In particular, by making this sum 15.0% or more, more stable glass can be obtained. Therefore, the mass sum SiO 2 + B 2 O 3 + Al 2 O 3 is preferably at least 15.0%, more preferably more than 18.0%, further preferably more than 20.0%, further preferably more than 22.0%. , More preferably more than 25.0%. On the other hand, when the sum is less than 50.0%, a decrease in the refractive index due to an excessive content of these components can be suppressed.
  • the mass sum SiO 2 + B 2 O 3 + Al 2 O 3 is preferably less than 50.0%, more preferably less than 47.0%, even more preferably less than 44.0%, even more preferably less than 42.0%. , More preferably less than 39.0%.
  • the ratio of the sum of the content of the SiO 2 component and the content of the Al 2 O 3 component to the content of the B 2 O 3 component is preferably more than 0.30 and 10.00 or less.
  • the mass ratio (SiO 2 + Al 2 O 3 ) / B 2 O 3 is preferably more than 0.30, more preferably more than 0.45, still more preferably more than 0.60, and still more preferably more than 0.90. I do.
  • this ratio to 10.00 or less, more stable glass can be obtained.
  • the mass ratio (SiO 2 + Al 2 O 3 ) / B 2 O 3 is preferably at most 10.00, more preferably at most 10.00, further preferably at most 8.00, further preferably at most 6.00, More preferably, it is set to 5.50 or less.
  • the sum (mass sum) of the contents of Ln 2 O 3 components is 40.0% or more and 70.0% or more. % Or less is preferable.
  • the mass sum of the Ln 2 O 3 component is preferably 40.0% or more, more preferably more than 43.0%, still more preferably 45.0% or more, and further preferably more than 47.0%.
  • the mass sum of the Ln 2 O 3 component is preferably 70.0% or less, more preferably less than 65.0%, more preferably less than 64.0%, and still more preferably less than 63.0%.
  • the sum (mass sum) of the content of the RO component (where R is at least one selected from the group consisting of Mg, Ca, Sr, and Ba) is preferably less than 10.0%. Thereby, a decrease in the refractive index can be suppressed, and the stability of the glass can be increased. Therefore, the mass sum of the RO component is preferably less than 10.0%, more preferably less than 5.0%, still more preferably 3.0% or less, and further preferably less than 1.0%.
  • the sum (mass sum) of the contents of Rn 2 O components is preferably less than 10.0%.
  • Rn is one or more selected from the group consisting of Li, Na, and K
  • the mass sum of the Rn 2 O component is preferably less than 10.0%, more preferably less than 6.0%, further preferably less than 4.0%, further preferably less than 2.0%, further preferably less than 1%. 0.0% or less.
  • the ratio (mass ratio) of the sum of the Ln 2 O 3 components to the sum of the contents of the B 2 O 3 component, the SiO 2 component and the Al 2 O 3 component is preferably more than 0.30 and 10.00 or less (in the formula).
  • Ln is at least one selected from the group consisting of La, Gd, Y, and Yb). In particular, when the mass ratio is more than 0.30, the refractive index and Abbe number of the glass can be increased.
  • the mass ratio Ln 2 O 3 / (SiO 2 + B 2 O 3 + Al 2 O 3 ) is preferably more than 0.30, more preferably more than 0.50, further preferably more than 0.80, and still more preferably 1 It is more than 0.000, more preferably 1.27 or more, further preferably 1.35 or more, further preferably 1.50 or more.
  • the mass ratio Ln 2 O 3 / (SiO 2 + B 2 O 3 + Al 2 O 3 ) is preferably 10.00 or less, more preferably 5.00 or less, further preferably 3.00 or less, and further preferably 2 or less. .60 or less, more preferably 2.30 or less, and still more preferably 2.10 or less.
  • the ratio (mass ratio) of the sum of the component contents is preferably 0.80 or more and 6.00 or less (where Ln is at least one selected from the group consisting of La, Gd, Y, and Yb, and R is One or more members selected from the group consisting of Mg, Ca, Sr, Ba and Zn, and Rn one or more members selected from the group consisting of Li, Na and K).
  • the mass ratio is preferably 0.80, more preferably 1.00, further preferably 1.20,
  • the lower limit is further preferably 1.50, further preferably 1.80, preferably 6.00, more preferably 5.50, and even more preferably 5.00.
  • the mass ratio (Al 2 O 3 / Ln 2 O 3 ) is preferably 0.01 or more (where Ln is at least one selected from the group consisting of La, Gd, Y, Yb, and Lu). .
  • Ln is at least one selected from the group consisting of La, Gd, Y, Yb, and Lu.
  • the mass ratio of (Al 2 O 3 / Ln 2 O 3 ) may be preferably 0.01 or more, more preferably 0.03 or more, and further preferably 0.05 or more.
  • the mass ratio by setting the mass ratio to 1.00 or less, it is possible to suppress deterioration of the melting property of the glass raw material and excessive rise in viscosity.
  • the mass ratio of (Al 2 O 3 / Ln 2 O 3 ) is preferably 1.00 or less, more preferably 0.50 or less, further preferably 0.0.30 or less, and further more preferably 0.25 or less. , And more preferably 0.20 or less.
  • the mass sum (ZrO 2 + TiO 2 + Nb 2 O 5 + Ta 2 O 5 + WO 3 + Bi 2 O 3 + TeO 2 ) is preferably 20.0% or less.
  • the mass sum of (ZrO 2 + TiO 2 + Nb 2 O 5 + Ta 2 O 5 + WO 3 + Bi 2 O 3 + TeO 2 ) is preferably 20.0% or less, more preferably 18.0% or less, and still more preferably 15% or less. 0.0% or less, more preferably 5.0% or less, and still more preferably 4.0% or less.
  • the mass ratio (Ln 2 O 3 / RO) is preferably 1.0 or more (where Ln is at least one selected from the group consisting of La, Gd, Y, Yb, and Lu).
  • Ln is at least one selected from the group consisting of La, Gd, Y, Yb, and Lu.
  • the mass ratio of (Ln 2 O 3 / RO) is preferably 1.0 or more, more preferably 3.0 or more, further preferably 5.0 or more, further preferably 10.0 or more, and further preferably 20 or more. 0.0 or more. Note that, even when no RO component is contained, the effect of improving the chemical durability can be obtained, and thus the upper limit of the mass ratio of (Ln 2 O 3 / RO) may be infinite.
  • the mass ratio (Ln 2 O 3 / Rn 2 O) is preferably 3.0 or more.
  • the mass ratio of (Ln 2 O 3 / Rn 2 O) is preferably 3.0 or more, more preferably 5.0 or more, further preferably 8.0 or more, further preferably 10.0 or more, and still more preferably. May be 15.0 or more, more preferably 20.0 or more, further preferably 25.0 or more, and most preferably 30.0 or more. Note that, even when the Rn 2 O component is not contained, the effect of improving the chemical durability can be obtained, so that the upper limit of the mass ratio of (Ln 2 O 3 / Rn 2 O) is infinite even if it is infinite. Good.
  • the mass product (BaO ⁇ Gd 2 O 3 ) is preferably less than 8.0. By reducing this product, the effect of suppressing both the specific gravity of glass and the cost can be easily obtained. Therefore, the mass product of (BaO ⁇ Gd 2 O 3 ) is preferably less than 8.0, more preferably 7.0 or less, still more preferably 6.0 or less, still more preferably 5.0 or less, and even more preferably 4 or less. 0.0 or less, more preferably 3.0 or less, further preferably 2.0 or less, further preferably 1.0 or less, and still more preferably 0.1 or less.
  • the mass sum (SiO 2 + Al 2 O 3 ) is preferably 5.0% or more. Thereby, the effect of improving the chemical durability of the glass can be easily obtained. Accordingly, the mass sum of (SiO 2 + Al 2 O 3 ) is preferably at least 5.0%, more preferably at least 7.0%, further preferably at least 9.0%, further preferably at least 10.0%. Is also good. On the other hand, by setting the mass sum to 40.0% or less, it is possible to suppress the deterioration of the melting property of the glass raw material and the excessive increase in viscosity. Accordingly, the mass sum of (SiO 2 + Al 2 O 3 ) is preferably 40.0% or less, more preferably 45.0% or less, more preferably 35.0% or less, and still more preferably 30.0% or less. Good.
  • transition metal components such as Nd, V, Cr, Mn, Fe, Co, Ni, Cu, Ag, and Mo, excluding Ti, Zr, Nb, W, La, Gd, Y, Yb, and Lu, is Even if a small amount is contained singly or in combination, the glass is colored and has a property of causing absorption at a specific wavelength in the visible region. Is preferred.
  • lead compounds such as PbO and arsenic compounds such as As 2 O 3 are components that have a high environmental load, and therefore, should not substantially be contained, that is, should not be contained at all except for unavoidable contamination.
  • each component of Th, Cd, Tl, Os, Be, and Se tends to refrain from using as harmful chemicals in recent years, and is used not only in the glass manufacturing process but also in the processing process and disposal after commercialization. Environmental measures are required to this extent. Therefore, when importance is placed on environmental influences, it is preferable that these are not substantially contained.
  • substantially not contained means that the content is preferably less than 0.1%, and more preferably not contained except for inevitable impurities.
  • the content of components contained as inevitable impurities is, for example, less than 0.01% or less than 0.001%, but is not limited thereto.
  • the optical glass of the present invention is produced, for example, as follows. That is, the above-mentioned raw materials are uniformly mixed so that each component is within a predetermined content range, the prepared mixture is put into a platinum crucible, and is heated at 1100 to 1500 ° C. in an electric furnace according to the melting difficulty of the glass raw materials. The mixture is melted for 2 to 5 hours in the above temperature range, stirred and homogenized, cooled to an appropriate temperature, cast into a mold, and gradually cooled.
  • the optical glass of the present invention preferably has a high refractive index and a high Abbe number (low dispersion).
  • the lower limit of the refractive index ( nd ) of the optical glass of the present invention is preferably 1.70, more preferably 1.73, and even more preferably 1.75.
  • the upper limit of the refractive index ( nd ) of the optical glass of the present invention is preferably 2.00, more preferably 1.95, and even more preferably 1.90.
  • the lower limit of the Abbe number ( ⁇ d ) of the optical glass of the present invention is preferably 35, more preferably 38, further preferably 40, and further preferably 42.
  • the upper limit of the Abbe number ( ⁇ d ) of the optical glass of the present invention is preferably 55, more preferably 53, and even more preferably 51.
  • a high refractive index By having such a high refractive index, a large amount of light refraction can be obtained even if the optical element is made thin.
  • a shift in focus (chromatic aberration) due to the wavelength of light can be reduced. Therefore, for example, when an optical system is configured in combination with an optical element having high dispersion (low Abbe number), aberrations can be reduced as a whole of the optical system, and high imaging characteristics can be achieved.
  • the optical glass of the present invention is useful in optical design. Particularly, when an optical system is configured, it is possible to reduce the size of the optical system while achieving high imaging characteristics and the like. Can be expanded.
  • the optical glass of the present invention has a refractive index (n d ) and an Abbe number ( ⁇ d ) of ( ⁇ 0.01 ⁇ d +2.15) ⁇ n d ⁇ ( ⁇ 0.01 ⁇ d +2.35). It is preferable to satisfy the relationship.
  • the glass composition specified in the present invention refractive index (n d) and Abbe number ([nu d) is that satisfies this relationship, it is possible to obtain a relatively stable glass.
  • refractive index (n d) and Abbe number ([nu d) is, it is preferable to satisfy the relation of n d ⁇ (-0.01 ⁇ d +2.15) , n d ⁇ (- it is more preferable to satisfy the relationship 0.01 ⁇ d +2.20), it is more preferable to satisfy the relation of n d ⁇ (-0.01 ⁇ d +2.22) .
  • the refractive index (n d ) and the Abbe number ( ⁇ d ) preferably satisfy the relationship of n d ⁇ ( ⁇ 0.01 ⁇ d +2.35), and n d ⁇ ( It is more preferable to satisfy the relationship of ⁇ 0.01 ⁇ d +2.30), and it is still more preferable to satisfy the relationship of n d ⁇ ( ⁇ 0.01 ⁇ d +2.28).
  • the optical glass of the present invention has high acid resistance.
  • the chemical durability (acid resistance) of the glass by the powder method according to JOGIS06-2006 is preferably Class 1-4, more preferably Class 1-3, further preferably Class 1-2, and most preferably Class 1-2. It is one. Accordingly, when the optical glass is polished, the fogging of the glass due to an acidic polishing liquid or a cleaning liquid is reduced, so that the polishing processing can be performed more easily.
  • “acid resistance” refers to the durability against erosion of glass by an acid
  • the acid resistance is measured by JOGIS06-2006, "Method for measuring the chemical durability of optical glass” specified by Japan Optical Glass Industrial Association. Can be.
  • the chemical durability (acid resistance) by powder method is class 1 to class 4” means that the chemical durability (acid resistance) performed according to JOGIS06-2006 is the mass of the sample before and after the measurement. It means that the weight loss is less than 1.20% by mass.
  • class 1 of chemical durability (acid resistance) means that the weight loss of the sample before and after the measurement is less than 0.20% by mass
  • class 2 means the weight loss of the sample before and after the measurement.
  • Class 3 means that the weight loss rate of the sample before and after the measurement is 0.35 mass% or more and less than 0.65 mass%.
  • the optical glass of the present invention has high devitrification resistance, and more specifically, has a low liquidus temperature. That is, the upper limit of the liquidus temperature of the optical glass of the present invention is preferably 1300 ° C, more preferably 1280 ° C, and further preferably 1250 ° C. As a result, even if the melted glass flows out at a lower temperature, the crystallization of the produced glass is reduced, so that the devitrification when the glass is formed from the molten state can be reduced, and the optics using the glass can be reduced. The influence on the optical characteristics of the element can be reduced.
  • the lower limit of the liquidus temperature of the optical glass of the present invention is not particularly limited, but the liquidus temperature of the glass obtained by the present invention is generally 800 ° C or higher, specifically 850 ° C or higher, more specifically 900 ° C or higher. Often above ° C.
  • liquid phase temperature refers to a 5 ml cullet-shaped glass sample placed in a platinum crucible having a capacity of 50 ml, completely melted at 1400 ° C., and cooled to a predetermined temperature.
  • the predetermined temperature at the time of cooling is a temperature between 1300 ° C. and 800 ° C. in steps of 10 ° C.
  • the upper limit of the specific gravity of the optical glass of the present invention is preferably 5.50, more preferably 5.00, and preferably 4.80, from the viewpoint of reducing the weight of the optical element and the optical device.
  • the specific gravity of the optical glass of the present invention is generally about 3.00 or more, more specifically 3.50 or more, and more specifically 4.00 or more.
  • the specific gravity of the optical glass of the present invention is measured based on JOGIS05-1975 “Method for measuring specific gravity of optical glass” specified by Japan Optical Glass Industrial Association.
  • the optical glass of the present invention preferably has both high acid resistance and light weight. That is, the optical glass of the present invention preferably has a value of d ⁇ RA of 18.0 or less, where d is a specific gravity and RA is a series of chemical durability (acid resistance) by a powder method. In such an optical glass, both acid resistance and specific gravity are low values, so that both high acid resistance and weight reduction can be achieved, and further improvement in workability by polishing and reduction in the weight of optical elements and optical devices. Can be compatible. Therefore, the value of d ⁇ RA in the optical glass of the present invention is preferably 18.0, more preferably 15.0, further preferably 13.0, further preferably 10.0, and still more preferably 9.0. And On the other hand, the lower limit of d ⁇ RA is often about 2.0 or more, more specifically 3.0 or more, and more specifically 4.0 or more.
  • a glass molded body can be produced, for example, by means of polishing or by means of mold press molding such as reheat press molding or precision press molding. That is, mechanical processing such as grinding and polishing is performed on the optical glass to produce a glass molded body, or a preform for mold press molding is produced from the optical glass, and reheat press molding is performed on the preform.
  • a glass molded body is manufactured by performing a polishing process, or a preform manufactured by performing a polishing process or a preform formed by a known floating molding or the like is subjected to precision press molding to perform a glass molded body.
  • the means for producing the glass molded body is not limited to these means.
  • the optical glass of the present invention is useful for various optical elements and optical designs. Among them, it is particularly preferable to form a preform from the optical glass of the present invention and perform reheat press molding or precision press molding using the preform to produce an optical element such as a lens or a prism. This makes it possible to form a preform having a large diameter, so that the size of the optical element can be increased, and when used in an optical device such as a camera or a projector, high-definition and high-precision imaging and projection characteristics can be achieved. Can be realized.
  • the following embodiments are for illustrative purposes only, and are not limited to these embodiments.
  • the glasses of Examples and Comparative Examples of the present invention are used for ordinary optical glasses such as oxides, hydroxides, carbonates, nitrates, fluorides, metaphosphate compounds, etc., each of which is a raw material of each component.
  • High-purity raw materials were selected, weighed so as to have the composition ratios of the respective examples shown in the table, and uniformly mixed. Then, they were put into a platinum crucible, and were placed in an electric furnace according to the melting difficulty of the glass raw materials. After melting in a temperature range of ⁇ 1500 ° C. for 2 to 5 hours, the mixture was homogenized with stirring, then cast into a mold or the like, and gradually cooled to prepare.
  • the refractive index (n d ) of the glasses of the examples and comparative examples was indicated by a measured value with respect to the d-line (587.56 nm) of a helium lamp according to the V-block method specified in JIS B 7071-2: 2018. .
  • the Abbe number ( ⁇ d ) is the refractive index of the d line, the refractive index (n F ) of the hydrogen lamp for the F line (486.13 nm), and the refractive index (n C ) for the C line (656.27 nm).
  • Abbe number ( ⁇ d ) [(n d ⁇ 1) / (n F ⁇ n C )].
  • the slope a is determined intercept b when the 0.01.
  • the acid resistance of the glasses of Examples and Comparative Examples was measured according to JOGIS06-2006, "Method for Measuring Chemical Durability of Optical Glass", Japan Optical Glass Industry Association Standard. That is, a glass sample crushed to a particle size of 425 to 600 ⁇ m was placed in a specific gravity bottle and placed in a platinum basket. The platinum basket was placed in a quartz glass round bottom flask containing a 0.01 N nitric acid aqueous solution and treated in a boiling water bath for 60 minutes. Calculate the weight loss rate (% by mass) of the glass sample after the treatment, and class 1 when the weight loss rate is less than 0.20, and class 1 when the weight loss rate is less than 0.20 to 0.35. 2.
  • Class 3 when the weight loss rate is less than 0.35 to 0.65
  • Class 4 when the weight loss rate is less than 0.65 to 1.20
  • Class 4 when the weight loss rate is less than 1.20 to 2.20.
  • Class 5 and the case where the weight loss rate was 2.20 or more were classified as Class 6. At this time, the smaller the number of classes (series RA), the better the acid resistance of the glass.
  • the specific gravity d of the glasses of the examples and comparative examples was measured based on JOGIS05-1975 “Method for measuring the specific gravity of optical glass” specified by Japan Optical Glass Industrial Association. From the value of the measured specific gravity d and the value of the acid resistance series RA, the value of d ⁇ RA, which is the product of these, was determined.
  • the liquidus temperature of the glass of the example and the comparative example is such that a 5 ml cullet-shaped glass sample is put into a platinum crucible having a capacity of 50 ml and completely melted at 1400 ° C. in a platinum crucible. The temperature was lowered to any temperature set in units of ° C, held for 1 hour, taken out of the furnace and cooled, and immediately after observation of the glass surface and the presence or absence of crystals in the glass, the lowest value where no crystals were observed The temperature was determined.
  • the optical glasses of Examples of the present invention are both refractive index (n d) of 1.70 or more, with more detail is 1.71 or more, the refractive index (n d ) was 2.10 or less, more specifically 1.87 or less, within the desired range.
  • optical glasses of the examples of the present invention each have an Abbe number ( ⁇ d ) of 35 or more, more specifically 38 or more, and an Abbe number ( ⁇ d ) of 55 or less, more specifically 54 And within the desired range.
  • the optical glasses of Examples of the present invention all had chemical durability (acid resistance) according to the powder method of Classes 1 to 4, and more specifically Classes 1 to 3.
  • the glass of the comparative example had a chemical durability (acid resistance) of class 5 by the powder method. For this reason, it became clear that the optical glasses of the examples of the present invention had better acid resistance than the glasses of the comparative examples.
  • the optical glass of the present invention formed a stable glass, and devitrification hardly occurred during glass production. This is inferred from the fact that the liquidus temperature of the optical glass of the present invention is 1300 ° C. or lower, more specifically 1250 ° C. or lower.
  • the optical glasses of Examples of the present invention is a refractive index (n d) and Abbe number ([nu d) is, (- 0.01 ⁇ d +2.15) ⁇ n d ⁇ (-0.01 ⁇ d +2.35 ) Was satisfied, and more specifically, the relationship ( ⁇ 0.02 ⁇ d +2.22) ⁇ n d ⁇ ( ⁇ 0.02 ⁇ d +2.28) was satisfied.
  • the relationship between the refractive index of the glass of the present embodiment (n d) and Abbe number ([nu d) became as shown in Figure 1.
  • optical glasses of the examples of the present invention all had a specific gravity of 5.50 or less, more specifically 4.80 or less.
  • the value of d ⁇ RA when the specific gravity is d and the series of chemical durability (acid resistance) by the powder method is RA is 18.0 or less. In detail, it was 4.0 or more and 13.0 or less.
  • the optical glass of the comparative example had a value of d ⁇ RA of 19.10, and was not compatible with the suitability for polishing and the reduction in weight.
  • the optical glasses of Examples of the present invention while remaining refractive index (n d) and Abbe number ([nu d) is within the desired range, high acid resistance, and clear that the hard watermarks stable and lost Became. Therefore, it is presumed that the optical glass of the example of the present invention can easily produce a preform material and an optical element by polishing.
  • the optical glass of the example of the present invention a glass block was formed, and the glass block was ground and polished to form lenses and prisms. As a result, it was possible to stably process into various lens and prism shapes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Led Device Packages (AREA)

Abstract

L'invention concerne un verre optique stable qui présente un indice de réfraction (nd) et un nombre d'Abbe (νd) situés chacun dans une plage souhaitée et à partir duquel un matériau de préforme ou un élément optique peut être facilement produit par un traitement de polissage. Le verre optique comporte, en % en masse, plus de 0 % et pas plus de 35,0 % d'un constituant SiO2, plus de 0 % et pas plus de 35,0 % d'un constituant B2O3, plus de 20,0 % et pas plus de 65,0 % d'un constituant La2O3 et plus de 0 % et pas plus de 30,0 % d'un constituant Al2O3, et présente un indice de réfraction (nd) supérieur ou égal à 1,70, un nombre d'Abbe (νd) de 35 à 55 compris, et une durabilité chimique (tolérance à l'acide) mesurée par le procédé de poudre de la classe 1-4.
PCT/JP2019/025752 2018-07-18 2019-06-27 Verre optique, préforme et élément optique WO2020017275A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020531208A JP7424978B2 (ja) 2018-07-18 2019-06-27 光学ガラス、プリフォーム及び光学素子
CN201980047359.5A CN112424135A (zh) 2018-07-18 2019-06-27 光学玻璃、预成形体以及光学元件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-134838 2018-07-18
JP2018134838 2018-07-18

Publications (1)

Publication Number Publication Date
WO2020017275A1 true WO2020017275A1 (fr) 2020-01-23

Family

ID=69164063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/025752 WO2020017275A1 (fr) 2018-07-18 2019-06-27 Verre optique, préforme et élément optique

Country Status (4)

Country Link
JP (1) JP7424978B2 (fr)
CN (1) CN112424135A (fr)
TW (1) TWI808214B (fr)
WO (1) WO2020017275A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020026381A (ja) * 2018-08-16 2020-02-20 Hoya株式会社 光学ガラス、光学素子ブランクおよび光学素子

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113415991A (zh) * 2021-07-28 2021-09-21 成都光明光电股份有限公司 光学玻璃和光学元件

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018003720A1 (fr) * 2016-06-29 2018-01-04 株式会社 オハラ Verre optique, matériau de préforme, et élément optique
WO2018105279A1 (fr) * 2016-12-07 2018-06-14 株式会社 オハラ Verre optique, préforme, et élément optique
JP2018108920A (ja) * 2016-12-28 2018-07-12 株式会社オハラ 光学ガラス、プリフォーム及び光学素子

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010126141A1 (fr) * 2009-04-30 2010-11-04 株式会社オハラ Verre optique, élément optique et préforme pour le moulage de précision à la presse
CN104341101A (zh) * 2013-07-31 2015-02-11 株式会社小原 光学玻璃、预成型体材料及光学元件
JP5979723B2 (ja) * 2013-07-31 2016-08-31 株式会社オハラ 光学ガラス及び光学素子
JP6321312B1 (ja) * 2016-07-28 2018-05-09 旭硝子株式会社 光学ガラスおよび光学部品
JP6973905B2 (ja) * 2016-11-29 2021-12-01 株式会社オハラ 光学ガラス、プリフォーム及び光学素子

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018003720A1 (fr) * 2016-06-29 2018-01-04 株式会社 オハラ Verre optique, matériau de préforme, et élément optique
WO2018105279A1 (fr) * 2016-12-07 2018-06-14 株式会社 オハラ Verre optique, préforme, et élément optique
JP2018108920A (ja) * 2016-12-28 2018-07-12 株式会社オハラ 光学ガラス、プリフォーム及び光学素子

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020026381A (ja) * 2018-08-16 2020-02-20 Hoya株式会社 光学ガラス、光学素子ブランクおよび光学素子
JP7305317B2 (ja) 2018-08-16 2023-07-10 Hoya株式会社 光学ガラス、光学素子ブランクおよび光学素子

Also Published As

Publication number Publication date
TWI808214B (zh) 2023-07-11
JP7424978B2 (ja) 2024-01-30
TW202010717A (zh) 2020-03-16
CN112424135A (zh) 2021-02-26
JPWO2020017275A1 (ja) 2021-08-02

Similar Documents

Publication Publication Date Title
JP5979723B2 (ja) 光学ガラス及び光学素子
JP6096502B2 (ja) 光学ガラス及び光学素子
JP7325927B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP2019131465A (ja) 光学ガラス及び光学素子
WO2018066577A1 (fr) Verre optique, préforme, et élément optique
JP6560651B2 (ja) 光学ガラス及び光学素子
JP6906870B2 (ja) 光学ガラス、プリフォーム材及び光学素子
WO2013094619A1 (fr) Verre optique et élément optique
JP7112856B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP7048348B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP7224099B2 (ja) 光学ガラス、プリフォーム及び光学素子
WO2018003582A1 (fr) Verre optique, préforme, et élément optique
JP2018052764A (ja) 光学ガラス、プリフォーム及び光学素子
WO2020017275A1 (fr) Verre optique, préforme et élément optique
JP7049192B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP2018052763A (ja) 光学ガラス、プリフォーム及び光学素子
JPWO2019031095A1 (ja) 光学ガラス、光学素子及び光学機器
TW201908257A (zh) 光學玻璃、預成形體及光學元件
WO2020262014A1 (fr) Verre optique, préforme et élément optique
JP2017171578A (ja) 光学ガラス及び光学素子
JP2018087109A (ja) 光学ガラス、プリフォーム及び光学素子
JP6033487B2 (ja) 光学ガラス及び光学素子
JP6033488B1 (ja) 光学ガラス及び光学素子
JP6165281B2 (ja) 光学ガラス及び光学素子
WO2018142980A1 (fr) Verre optique, préforme et élément optique

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: 19838437

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020531208

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19838437

Country of ref document: EP

Kind code of ref document: A1