WO2012133420A1 - Verre optique, préforme, et élément optique - Google Patents

Verre optique, préforme, et élément optique Download PDF

Info

Publication number
WO2012133420A1
WO2012133420A1 PCT/JP2012/057955 JP2012057955W WO2012133420A1 WO 2012133420 A1 WO2012133420 A1 WO 2012133420A1 JP 2012057955 W JP2012057955 W JP 2012057955W WO 2012133420 A1 WO2012133420 A1 WO 2012133420A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
glass
optical glass
less
optical
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/057955
Other languages
English (en)
Japanese (ja)
Inventor
哲也 津田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ohara Inc
Original Assignee
Ohara Inc
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
Priority claimed from JP2011073356A external-priority patent/JP2012206891A/ja
Priority claimed from JP2011073357A external-priority patent/JP2012206892A/ja
Application filed by Ohara Inc filed Critical Ohara Inc
Priority to CN2012800159905A priority Critical patent/CN103476722A/zh
Publication of WO2012133420A1 publication Critical patent/WO2012133420A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum

Definitions

  • the present invention relates to an optical glass, a preform, and an optical element.
  • Optical systems such as digital cameras and video cameras, although large and small, contain blurs called aberrations. This aberration is classified into monochromatic aberration and chromatic aberration. In particular, the chromatic aberration is strongly dependent on the material characteristics of the lens used in the optical system.
  • chromatic aberration is corrected by combining a low-dispersion convex lens and a high-dispersion concave lens, but this combination can only correct aberrations in the red region and the green region, and remains in the blue region.
  • This blue region aberration that cannot be removed is called a secondary spectrum.
  • the partial dispersion ratio ( ⁇ g, F) is used as an index of the optical characteristics to be noticed in the optical design.
  • an optical material having a large partial dispersion ratio ( ⁇ g, F) is used for the low dispersion side lens, and the partial dispersion ratio ( By using an optical material having a small ⁇ g, F), the secondary spectrum is corrected well.
  • the partial dispersion ratio ( ⁇ g, F) is expressed by the following equation (1).
  • ⁇ g, F (n g ⁇ n F ) / (n F ⁇ n C ) (1)
  • optical glass there is an approximately linear relationship between a partial dispersion ratio ( ⁇ g, F) representing partial dispersion in a short wavelength region and an Abbe number ( ⁇ d ).
  • the straight line representing this relationship plots the partial dispersion ratio and Abbe number of NSL7 and PBM2 on the Cartesian coordinates employing the partial dispersion ratio ( ⁇ g, F) on the vertical axis and the Abbe number ( ⁇ d ) on the horizontal axis. It is represented by a straight line connecting two points and is called a normal line (see FIG. 1).
  • Normal glass which is the standard for normal lines, differs depending on the optical glass manufacturer, but each company defines it with almost the same slope and intercept.
  • NSL7 and PBM2 are optical glasses manufactured by OHARA, Inc., and the Abbe number ( ⁇ d ) of PBM2 is 36.3, the partial dispersion ratio ( ⁇ g, F) is 0.5828, and the Abbe number ( ⁇ d ) of NSL7. Is 60.5, and the partial dispersion ratio ( ⁇ g, F) is 0.5436.
  • optical glasses as shown in Patent Documents 1 to 3 are known.
  • the glasses disclosed in Patent Documents 1 to 3 have a small partial dispersion ratio and are not sufficient for use as a lens for correcting the secondary spectrum. Further, the glasses disclosed in Patent Documents 1 to 3 are not highly transparent with respect to visible light, and are not sufficient for use in transmitting visible light. That is, there is a demand for an optical glass having a small Abbe number ( ⁇ d ), high dispersion, a small partial dispersion ratio ( ⁇ g, F), and high transparency to visible light.
  • ⁇ d Abbe number
  • ⁇ g, F small partial dispersion ratio
  • the present invention has been made in view of the above problems, and the object of the present invention is to have a small Abbe number ( ⁇ d ) and a partial dispersion while the refractive index (n d ) is within a desired range.
  • the object is to obtain an optical glass having a small ratio ( ⁇ g, F) and enhanced transparency to visible light, and a preform and an optical element using the optical glass.
  • the present inventors have conducted intensive test research, and as a result, by combining the SiO 2 component and the CaO component, and making these contents within a predetermined range, a stable glass can be obtained. It was found that the Abbe number ( ⁇ d ) was lowered while being formed, and the coloration of the glass was reduced.
  • the present invention provides the following.
  • the molar ratio of the oxide composition in terms of (Nb 2 O 5 + BaO) / (TiO 2 + CaO) is one wherein the optical glass from at 0.100 or more (1) (7).
  • any description of the optical glass of the molar ratio TiO 2 / Nb 2 O 5 in terms of oxide composition is 5.00 or less (1) (8).
  • any description of the optical glass of the molar ratio TiO 2 / Nb 2 O 5 in terms of oxide composition is 3.00 or less (1) (9).
  • the molar sum of the Rn 2 O component (wherein Rn is one or more selected from the group consisting of Li, Na, K, and Cs) with respect to the total amount of glass in an oxide equivalent composition is 30.0% or less
  • the molar sum of the RO component (wherein R is one or more selected from the group consisting of Mg, Ca, Sr, Ba, Zn) with respect to the total amount of glass in an oxide equivalent composition is 20.0% or more
  • the SiO 2 component and the CaO component are used in combination with one or more of the BaO component and the K 2 O component, and the content thereof is within a predetermined range.
  • the partial dispersion ratio ( ⁇ g, F) of the glass has a desired relationship with the Abbe number ( ⁇ d ), and the coloration of the glass is reduced. Therefore, an optical glass having a high refractive index (n d ), a small Abbe number ( ⁇ d ), a small partial dispersion ratio ( ⁇ g, F) and high transparency to visible light, and The preform and optical element used can be obtained.
  • the SiO 2 component is 20.0% or more and 60.0% or less and the CaO component is more than 20.0 and 50.0% by mol% with respect to the total amount of the glass having an oxide conversion composition.
  • %, Nb 2 O 5 component content is 30.0% or less, and the partial dispersion ratio ( ⁇ g, F) is ( ⁇ 0) within the range of ⁇ d ⁇ 31 with respect to the Abbe number ( ⁇ d).
  • the first optical glass the glass the total amount of substance of the oxide composition in terms of the mole percent containing BaO component and K 2 O ingredients below 20.0% more than 0% in total.
  • a lower partial dispersion ratio ⁇ g, F
  • the SiO 2 component and the CaO component are used in combination and their contents are within a predetermined range, coloring and devitrification hardly occur when the glass is reheated.
  • the refractive index (n d ) is within a desired range, the Abbe number ( ⁇ d ) is small, the partial dispersion ratio ( ⁇ g, F) is small, the transparency to visible light is high, and the press is high.
  • An optical glass having moldability, and a preform and an optical element using the optical glass can be obtained.
  • the content of the SiO 2 component, the CaO component, and the Nb 2 O 5 component is within a predetermined range, so that a low Abbe number and partial dispersion ratio are obtained while obtaining a high refractive index. Obtained and glass devitrification is reduced. Therefore, while the refractive index (n d ) is within a desired high range, the optical glass having a small Abbe number ( ⁇ d ), a small partial dispersion ratio ( ⁇ g, F), and high transparency to visible light, A preform and an optical element using the same can be obtained.
  • each component constituting the optical glass of the present invention The composition range of each component constituting the optical glass of the present invention is described below. In the present specification, unless otherwise specified, the content of each component is expressed in mol% with respect to the total amount of glass in the oxide equivalent composition.
  • the “oxide equivalent composition” means that the oxide, composite salt, metal fluoride, etc. used as the raw material of the glass component of the present invention are all decomposed and changed into oxides when melted. It is the composition which described each component contained in glass by making the total substance amount of the said production
  • the SiO 2 component is a component that promotes stable glass formation and reduces devitrification (generation of crystalline substances), which is undesirable as an optical glass.
  • the SiO 2 component is 20.0% or more, a glass having excellent devitrification resistance can be obtained without significantly increasing the partial dispersion ratio of the glass. Moreover, devitrification and coloring at the time of reheating can be reduced thereby.
  • by making the content of the SiO 2 component 60.0% or less it is possible to easily obtain a desired high refractive index by making it difficult for the refractive index of the glass to decrease, and partial dispersion of the glass An increase in the ratio can be suppressed.
  • the content of SiO 2 component is preferably 20.0%, more preferably 21.0%, further preferably 24.0%, further preferably 27.0%, and most preferably 30.0%. And Further, the content of this SiO 2 component is preferably 60.0%, more preferably 50.0%, and most preferably 45.0%.
  • SiO 2 , K 2 SiF 6 , Na 2 SiF 6 or the like can be used as a raw material.
  • the CaO component is a component necessary for obtaining a glass having a low Abbe number and high devitrification resistance.
  • the content of the CaO component is more than 20.0%, an optical glass having a low Abbe number and high devitrification resistance can be obtained, and the solubility of the glass can be increased.
  • the content of the CaO component 50.0% or less while suppressing the decrease in the refractive index of the glass and the increase in the partial dispersion ratio, the devitrification resistance of the glass due to the excessive content of the CaO component. Deterioration can be suppressed. Moreover, devitrification and coloring at the time of reheating can be reduced thereby.
  • the content of the CaO component is preferably more than 20.0%, more preferably 24.0% as an upper limit, still more preferably more than 30.0%, and even more preferably 32.0%. Most preferably, the lower limit is 33.5%.
  • the CaO component content is preferably 50.0%, more preferably 45.0%, still more preferably 43.0%, and most preferably 40.0%.
  • CaO component CaCO 3 , CaF 2 or the like can be used as a raw material.
  • the first optical glass preferably contains a BaO component and a K 2 O component in total of more than 0% and 20.0% or less.
  • a glass having a desired low partial dispersion ratio can be obtained.
  • the molar sum (BaO + K 2 O) is preferably more than 0%, more preferably 0.5%, and even more preferably 1.0%.
  • the molar sum (BaO + K 2 O) is preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • the Nb 2 O 5 component is a component that increases the devitrification resistance of the glass, and is a component that decreases the Abbe number and the partial dispersion ratio while increasing the refractive index of the glass, and is an optional component in the optical glass of the present invention. It is. In particular, by setting the content of the Nb 2 O 5 component to 30.0% or less, an increase in the melting temperature during glass production can be suppressed, and devitrification due to excessive content of the Nb 2 O 5 component can be reduced. Therefore, the content of the Nb 2 O 5 component is preferably 30.0%, more preferably 20.0%, and most preferably 15.0%.
  • the Nb 2 O 5 component may not be contained, but by containing more than 0% of the Nb 2 O 5 component, the Abbe number should be lowered while increasing the refractive index of the glass. And the partial dispersion ratio of the glass can be reduced. Further, the content of Nb 2 O 5 component that contains more than 0%, increasing the devitrification resistance of the glass, it is possible to improve the press formability of the glass. Accordingly, the content of the Nb 2 O 5 component is preferably more than 0%, more preferably 3.0%, even more preferably 4.0%, even more preferably 5.0%, and most preferably 6.0. % Is the lower limit. As the Nb 2 O 5 component, Nb 2 O 5 or the like can be used as a raw material.
  • the TiO 2 component is a component that lowers the Abbe number while increasing the refractive index of the glass, and is an optional component in the optical glass of the present invention.
  • the content of the TiO 2 component is 20.0% or less, more preferably 10.0% or less, the coloration of the glass can be reduced and the internal transmittance of the glass can be increased.
  • the content of the TiO 2 component is preferably 20.0%, more preferably 15.0%, more preferably less than 12.0%, still more preferably 10.0%, and even more preferably 9%.
  • the content of the TiO 2 component is preferably more than 0%, more preferably 1.0%, still more preferably 3.0%, and most preferably 4.5%.
  • TiO 2 component TiO 2 or the like can be used as a raw material.
  • the sum of the contents of the Nb 2 O 5 component and the TiO 2 component is preferably 10.0% or more and 40.0% or less.
  • the sum is 10.0% or more
  • the contents of the Nb 2 O 5 component and the TiO 2 component that increase the refractive index and lower the Abbe number increase, so that the desired high refractive index and low Abbe An optical glass having a number can be obtained.
  • this sum is 40.0% or less, devitrification due to these components is reduced, and thus a glass having higher devitrification resistance and stability can be obtained.
  • the lower limit of the molar sum (Nb 2 O 5 + TiO 2 ) is preferably 10.0%, more preferably 12.0%, still more preferably 14.0%, and most preferably 15.0%.
  • the molar sum (Nb 2 O 5 + TiO 2 ) is preferably 40.0%, more preferably 30.0%, still more preferably 25.0%, and most preferably 20.0%.
  • a BaO component is a component which raises the refractive index of glass, makes the partial dispersion ratio of glass low, and improves the devitrification resistance of glass.
  • the upper limit of the content of the BaO component is preferably 25.0%, more preferably 20.0%, still more preferably 15.0%, and most preferably 10.0%.
  • the BaO component is an optional component, it does not have to be contained.
  • the content of the BaO component is preferably more than 0%, more preferably 0.5%, and even more preferably 1.0%.
  • BaO component may be used BaCO 3, Ba (NO 3) 2 and the like as raw materials.
  • the sum of the contents of the Nb 2 O 5 component and the BaO component with respect to the sum of the contents of the TiO 2 component and the CaO component is preferably 0.100 or more.
  • the contents of the Nb 2 O 5 component and the BaO component, which are components that lower the partial dispersion ratio increase with respect to the contents of the TiO 2 component and the CaO component, which are components that increase the partial dispersion ratio.
  • the upper limit of the molar ratio (Nb 2 O 5 + BaO) / (TiO 2 + CaO) is not particularly limited, but the optical glass of the present invention has this molar ratio (Nb 2 O 5 + BaO) / (TiO 2 + CaO). It is often 1.000 or less, more specifically 0.700 or less, and more specifically 0.400 or less.
  • the molar ratio TiO 2 / Nb 2 O 5 of the oxide equivalent composition is preferably 5.00 or less.
  • the partial dispersion ratio is lowered while the Abbe number of the glass is adjusted within a desired range, so that an optical glass having a relationship between the desired Abbe number and the partial dispersion ratio can be obtained.
  • the molar ratio TiO 2 / Nb 2 O 5 of the oxide conversion composition is preferably 5.00, more preferably 4.00, still more preferably 3.00, still more preferably 2.50, and even more preferably 2. 00 is the upper limit.
  • this TiO 2 / Nb 2 O 5 is made 2.00 or less from the viewpoint of further reducing the partial dispersion ratio. Most preferably.
  • Li 2 O component improves the meltability of the glass is a component and to lower the partial dispersion ratio of the glass, an optional component of the optical glass of the present invention.
  • the content of the Li 2 O component is preferably 25.0%, more preferably 17.0%, still more preferably 12.0%, still more preferably 9.5%, and most preferably 5.0%.
  • Li 2 O component Li 2 CO 3 , LiNO 3 , LiF, or the like can be used as a raw material.
  • Na 2 O component with a component for improving the meltability of the glass is a component for lowering the glass transition point, which is an optional component of the optical glass of the present invention.
  • the content of the Na 2 O component 25.0% or less, it is possible to make it difficult for the refractive index to decrease and to make it difficult to deteriorate the chemical durability. Moreover, devitrification resistance at the time of glass formation can be improved, and devitrification and coloring at the time of reheating can be reduced. Therefore, the content of the Na 2 O component is preferably 25.0%, more preferably 15.0%, still more preferably 10.0%, and most preferably 5.0%.
  • Na 2 O component Na 2 CO 3 , NaNO 3 , NaF, Na 2 SiF 6 or the like can be used as a raw material.
  • K 2 O component is a component to lower the glass transition point while adjusting the meltability of the glass, an optional component of the optical glass of the present invention.
  • the upper limit of the content of the K 2 O component is preferably 25.0%, more preferably 20.0%, further preferably 15.0%, and most preferably 10.0%.
  • the K 2 O component may not be contained from the viewpoint of obtaining a glass with higher press formability, but is preferably more than 0% and more preferably 0 because of the effect of lowering the partial dispersion ratio. It may be contained at a lower limit of 0.5%, more preferably 1.0%.
  • K 2 O component K 2 CO 3 , KNO 3 , KF, KHF 2 , K 2 SiF 6 or the like can be used as a raw material.
  • Cs 2 O component is a component to lower the glass transition point, which is an optional component of the optical glass of the present invention.
  • the content of the Cs 2 O component is preferably 10.0%, more preferably 5.0%, and still more preferably 3.0%.
  • Cs 2 O component Cs 2 CO 3 , CsNO 3 or the like can be used as a raw material.
  • the sum of the contents of the Rn 2 O component (wherein Rn is one or more selected from the group consisting of Li, Na, K and Cs) is 30.0% or less. Is preferred. In particular, by setting the molar sum to 30.0% or less, it is possible to easily obtain a desired high refractive index and reduce devitrification of the glass. Therefore, the molar sum of the contents of the Rn 2 O component is preferably 30.0%, more preferably 20.0%, even more preferably 10.0%, still more preferably 7.0%, most preferably 5. The upper limit is 0%.
  • the MgO component is a component that lowers the melting temperature of the glass and is an optional component in the optical glass of the present invention.
  • the upper limit of the content of the MgO component is preferably 20.0%, more preferably 10.0%, and most preferably 5.0%.
  • MgO component MgO, MgCO 3 , MgF 2 or the like can be used as a raw material.
  • a SrO component is a component which raises the refractive index of glass and improves the devitrification resistance of glass, and is an arbitrary component in the optical glass of this invention.
  • the deterioration of the chemical durability of the glass can be suppressed by setting the content of the SrO component to 20.0% or less.
  • the content of the SrO component is preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • Sr (NO 3 ) 2 , SrF 2 or the like can be used as a raw material.
  • the ZnO component is a component that increases the devitrification resistance of the glass and lowers the glass transition point, and is an optional component in the optical glass of the present invention.
  • the upper limit of the content of the ZnO component is preferably 30.0%, more preferably 20.0%, still more preferably 16.0%, and most preferably 10.0%.
  • the ZnO component is an optional component, it does not have to be contained.
  • the content of this ZnO component is preferably more than 0%, more The lower limit is preferably 0.5%, and more preferably 1.0%.
  • ZnO component ZnO, ZnF 2 or the like can be used as a raw material.
  • the RO component (wherein R is one or more selected from the group consisting of Zn, Mg, Ca, Sr, and Ba) increases the refractive index while increasing the devitrification resistance of the glass. It is a useful component for adjusting.
  • the devitrification resistance of the glass can be improved by setting the content of the RO component to 20.0% or more.
  • the total content of RO components is preferably 20.0%, more preferably 25.0%, still more preferably 30.0%, and most preferably 35.0%. Further, the total content of this RO component is preferably 60.0%, more preferably 55.0%, and most preferably 50.0%.
  • P 2 O 5 component is a component which enhances the stability of the glass, an optional component of the optical glass of the present invention.
  • the content of the P 2 O 5 component is preferably 30.0%, more preferably 20.0%, and most preferably 10.0%.
  • Al (PO 3 ) 3 , Ca (PO 3 ) 2 , Ba (PO 3 ) 2 , BPO 4 , H 3 PO 4 or the like can be used as a raw material.
  • the B 2 O 3 component is a component that promotes stable glass formation, increases devitrification resistance, and increases the solubility of the glass, and is an optional component in the optical glass of the present invention.
  • the content of the B 2 O 3 component is preferably 40.0%, more preferably 30.0%, even more preferably 20.0%, even more preferably 15.0%, and most preferably 10.0%. Is the upper limit.
  • the B 2 O 3 component is an optional component and may not be contained. However, by containing more than 0% of the B 2 O 3 component, the devitrification resistance and solubility of the glass can be improved. . Therefore, the content of this B 2 O 3 component is preferably more than 0%, more preferably 1.0%, and most preferably 2.0%.
  • the B 2 O 3 component H 3 BO 3 , Na 2 B 4 O 7 , Na 2 B 4 O 7 .10H 2 O, BPO 4 or the like can be used as a raw material.
  • the GeO 2 component is a component that increases the refractive index of the glass and stabilizes the glass to reduce devitrification during molding, and is an optional component in the optical glass of the present invention.
  • the content of the GeO 2 component is 20.0%, more preferably 10.0%, still more preferably 5.0%, and most preferably 3.0%.
  • the GeO 2 component GeO 2 or the like can be used as a raw material.
  • the Y 2 O 3 component, the La 2 O 3 component, the Gd 2 O 3 component, and the Yb 2 O 3 component are components that increase the refractive index of the glass and reduce the partial dispersion ratio.
  • It is an optional component.
  • the devitrification resistance of the glass can be improved by setting the contents of the Y 2 O 3 component, La 2 O 3 component, Gd 2 O 3 component, and Yb 2 O 3 component to 15.0% or less, respectively. And an increase in the Abbe number of the glass can be suppressed.
  • the content of each of the Y 2 O 3 component, La 2 O 3 component, Gd 2 O 3 component and Yb 2 O 3 component is preferably 15.0%, more preferably 10.0%, and still more preferably The upper limit is 7.0%, most preferably 4.2%.
  • Y 2 O 3 component, La 2 O 3 component, Gd 2 O 3 component and Yb 2 O 3 component are Y 2 O 3 , YF 3 , La 2 O 3 , La (NO 3 ) 3 .XH 2 O as raw materials. (X is an arbitrary integer), Gd 2 O 3 , GdF 3 , Yb 2 O 3 and the like can be used.
  • the Ta 2 O 5 component is a component that increases the refractive index of the glass, decreases the Abbe number and partial dispersion ratio of the glass, and increases the devitrification resistance of the glass, and is an optional component in the optical glass of the present invention.
  • the content of Ta 2 O 5 component 15.0% or less, the amount of Ta 2 O 5 component, which is a rare mineral resource, is reduced, and the glass is more easily melted at a lower temperature. The production cost can be reduced.
  • the content of the Ta 2 O 5 component is preferably 15.0%, more preferably 10.0%, and most preferably 5.0%.
  • Ta 2 O 5 component Ta 2 O 5 or the like can be used as a raw material.
  • Bi 2 O 3 component low Abbe number by increasing the refractive index of the glass is a component and to lower the glass transition point, which is an optional component of the optical glass of the present invention.
  • the content of the Bi 2 O 3 component is preferably 15.0%, more preferably 10.0%, and most preferably 5.0%.
  • Bi 2 O 3 component Bi 2 O 3 or the like can be used as a raw material.
  • the WO 3 component is a component that increases the refractive index of the glass to lower the Abbe number, increases the devitrification resistance of the glass, and increases the solubility of the glass, and is an optional component in the optical glass of the present invention.
  • the content of the WO 3 component is preferably 20.0%, more preferably 10.0%, and most preferably 5.0%.
  • WO 3 component WO 3 or the like can be used as a raw material.
  • the TeO 2 component is a component that raises the refractive index of the glass, lowers the partial dispersion ratio of the glass, and lowers the glass transition point, and is an optional component in the optical glass of the present invention.
  • the content of the TeO 2 component is preferably 30.0%, more preferably 20.0%, and most preferably 10.0%.
  • TeO 2 component can use TeO 2 or the like as a raw material.
  • the ZrO 2 component is a component that increases the refractive index and Abbe number of the glass, lowers the partial dispersion ratio, and increases the devitrification resistance, and is an optional component in the optical glass of the present invention.
  • the upper limit of the content of the ZrO 2 component is preferably 15.0%, more preferably 12.0%, and most preferably 10.0%.
  • the ZrO 2 component may not be contained, but by containing more than 0% of the ZrO 2 component, the partial dispersion ratio of the glass can be easily lowered while increasing the refractive index and Abbe number of the glass.
  • the content of the ZrO 2 component is preferably more than 0%, more preferably 1.0%, and still more preferably 2.0%.
  • ZrO 2 component ZrO 2 , ZrF 4 or the like can be used as a raw material.
  • the Al 2 O 3 component is a component that improves the chemical durability of the glass and improves the devitrification resistance of the glass, and is an optional component in the optical glass of the present invention.
  • the upper limit of the content of the Al 2 O 3 component is preferably 15.0%, more preferably 10.0%, and most preferably 5.0%.
  • Al 2 O 3 component Al 2 O 3 , Al (OH) 3 , AlF 3 or the like can be used as a raw material.
  • the Sb 2 O 3 component is a component that accelerates defoaming of the glass and clarifies the glass, and is an optional component in the optical glass of the present invention.
  • Sb 2 O 3 component by a content relative to the glass the total amount of substance 1.0% or less, can be hardly caused excessive foaming during glass melting, Sb 2 O 3 ingredient is dissolved facilities (especially Alloying with noble metals such as Pt). Therefore, the content of the Sb 2 O 3 component is preferably 1.0%, more preferably 0.8%, and still more preferably 0.6%. However, when importance is attached to the environmental impact of the optical glass, it is preferable not to contain the Sb 2 O 3 component.
  • Sb 2 O 3 component Sb 2 O 3 , Sb 2 O 5 , Na 2 H 2 Sb 2 O 7 .5H 2 O, or the like can be used as a raw material.
  • components of the fining defoaming of glass is not limited to the above Sb 2 O 3 ingredients may be used known refining agents and defoamers in the field of glass production, or a combination thereof .
  • optical glass of the present invention other components can be added as necessary within a range not impairing the properties of the glass.
  • the transition metal components such as V, Cr, Mn, Co, Ni, Cu, Ag, and Mo, excluding Ti, Zr, and Nb, are colored by the glass even when each of them is contained alone or in combination. Since it has a property of causing absorption at a specific wavelength in the visible range, it is preferable that the optical glass using the wavelength in the visible range does not substantially contain.
  • lead compounds such as PbO, arsenic compounds such as As 2 O 3 , and components of Th, Cd, Tl, Os, Be, and Se have been refraining from being used as harmful chemical substances in recent years.
  • Environmental measures are required not only in the manufacturing process but also in the processing process and disposal after commercialization. Therefore, when importance is placed on the environmental impact, it is preferable not to substantially contain them except for inevitable mixing.
  • the optical glass is substantially free of substances that pollute the environment. Therefore, the optical glass can be manufactured, processed, and discarded without taking any special environmental measures.
  • the glass that is preferably used as the optical glass of the present invention cannot be expressed directly in the description of mass% because the composition is expressed in mol% with respect to the total amount of glass of oxide conversion composition.
  • the composition expressed by mass% of each component present in the glass composition satisfying various required properties generally takes the following values in terms of oxide composition.
  • the composition expressed by mass% of each component present in the first optical glass generally takes the following values in terms of oxide composition.
  • the composition by the mass% display of each component which exists in 2nd optical glass takes the following values in an oxide conversion composition in general.
  • the optical glass of the present invention is produced, for example, as follows. That is, the above raw materials are uniformly mixed so that each component is within a predetermined content range, and the prepared mixture is put into a platinum crucible, a quartz crucible or an alumina crucible and roughly melted, then a gold crucible, a platinum crucible In a platinum alloy crucible or iridium crucible, melt in a temperature range of 1100 to 1400 ° C. for 3 to 5 hours, stir and homogenize to blow out bubbles, etc., then lower the temperature to 1000 to 1300 ° C. and then finish stirring This is done by removing the striae, casting into a mold and slow cooling.
  • the optical glass of the present invention preferably has a predetermined refractive index and dispersion (Abbe number). More specifically, the refractive index (n d ) of the optical glass of the present invention is preferably 1.70, more preferably 1.75, and most preferably 1.78. On the other hand, the upper limit of the refractive index (n d ) of the optical glass of the present invention is not particularly limited, but is generally 2.20 or less, more specifically 2.10 or less, more specifically 2.00 or less, and more specifically. Specifically, it is often 1.95 or less. Further, the Abbe number ( ⁇ d ) of the optical glass of the present invention is preferably 40, more preferably 38, and most preferably 35.
  • Abbe number ( ⁇ d ) of the optical glass of the present invention is preferably 40, more preferably 38, and most preferably 35.
  • the lower limit of the Abbe number ( ⁇ d ) of the optical glass of the present invention is not particularly limited, but is generally 20 or more, more specifically 25 or more, and more specifically 27 or more. As a result, the degree of freedom in optical design is increased, and a large amount of light refraction can be obtained even if the device is made thinner.
  • the optical glass of the present invention has a low partial dispersion ratio ( ⁇ g, F). More specifically, the partial dispersion ratio ( ⁇ g, F) of the optical glass of the present invention is within the range of ⁇ d ⁇ 31 with respect to the Abbe number ( ⁇ d ) ( ⁇ 0.00162 ⁇ ⁇ d + 0.63822). ⁇ ( ⁇ g, F) ⁇ ( ⁇ 0.00275 ⁇ ⁇ d + 0.68125) is satisfied, and ( ⁇ 0.00162 ⁇ ⁇ d + 0.63822) ⁇ ( ⁇ g, F) ⁇ ( ⁇ in the range of ⁇ d > 31 0.00162 ⁇ ⁇ d + 0.64622).
  • the lower limit of the partial dispersion ratio ( ⁇ g, F) of the optical glass at ⁇ d ⁇ 31 is preferably ( ⁇ 0.00162 ⁇ ⁇ d + 0.63822), more preferably ( ⁇ 0.00162 ⁇ ⁇ d + 0.63922), Most preferred is ( ⁇ 0.00162 ⁇ ⁇ d + 0.64022).
  • the upper limit of the partial dispersion ratio ( ⁇ g, F) of the optical glass at ⁇ d ⁇ 31 is preferably ( ⁇ 0.00275 ⁇ ⁇ d + 0.68125), more preferably ( ⁇ 0.00275 ⁇ ⁇ d + 0.68025), Most preferred is ( ⁇ 0.00275 ⁇ ⁇ d + 0.67925).
  • the lower limit of the partial dispersion ratio ( ⁇ g, F) of the optical glass at ⁇ d > 31 is preferably ( ⁇ 0.00162 ⁇ ⁇ d + 0.63822), more preferably ( ⁇ 0.00162 ⁇ ⁇ d + 0.63922), most preferably Preferably, it is ( ⁇ 0.00162 ⁇ ⁇ d + 0.64022).
  • the upper limit of the partial dispersion ratio ( ⁇ g, F) of the optical glass at ⁇ d > 31 is preferably ( ⁇ 0.00162 ⁇ ⁇ d + 0.64622), more preferably ( ⁇ 0.00162 ⁇ ⁇ d + 0.64522). Most preferred is ( ⁇ 0.00162 ⁇ ⁇ d + 0.64422).
  • the partial dispersion ratio ( ⁇ g, F) of general glass is higher than that of the normal line, and the partial dispersion ratio ( ⁇ g, F) of general glass is high.
  • the Abbe number ( ⁇ d ) are represented by curves.
  • the optical glass of this invention has little coloring.
  • the wavelength ( ⁇ 70 ) indicating a spectral transmittance of 70% in a sample having a thickness of 10 mm is 500 nm or less, more preferably 470 nm or less, and still more preferably. Is 450 nm or less, and most preferably 430 nm or less.
  • the optical glass of the present invention has a wavelength ( ⁇ 80 ) of 560 nm or less, more preferably 540 nm or less, and most preferably, when the sample has a thickness of 10 mm and exhibits a spectral transmittance of 80%.
  • a wavelength ( ⁇ 5 ) showing a spectral transmittance of 5% in a sample having a thickness of 10 mm is 420 nm or less, more preferably 400 nm or less, and most preferably 380 nm or less.
  • this optical glass can be preferably used as a material for an optical element such as a lens.
  • the optical glass of the present invention preferably has good press formability. That is, the optical glass of the present invention divides the transmittance of light (d-line) having a wavelength of 587.56 nm of the test piece after the reheating test (ii) by the transmittance of d-line of the test piece before the reheating test.
  • the measured value is preferably 0.95 or more.
  • a lambda 70 is a wavelength at which the transmittance of the reheating test (a) before the specimen is 70% and the difference between the lambda 70 of the test piece after the reheating test is 20nm or less.
  • the value obtained by dividing the transmittance of the light beam (d-line) having a wavelength of 587.56 nm of the test piece after the reheating test (ii) by the transmittance of the d-line of the test piece before the reheating test (ii) is The lower limit is preferably 0.95, more preferably 0.96, and most preferably 0.97.
  • the difference between the lambda 70 of the test piece after the reheating test and lambda 70 of reheating test (a) prior to the test piece (b) is preferably 20 nm, more preferably 18 nm, and most preferably a maximum of 16nm To do.
  • reheating test (A) a test piece 15 mm ⁇ 15 mm ⁇ 30 mm is reheated, and the temperature is raised from room temperature to a temperature 80 ° C. higher than the transition temperature (Tg) of each sample in 150 minutes. This is carried out by keeping the temperature at 80 ° C. higher than the transition temperature (Tg) for 30 minutes, then naturally cooling to room temperature, and polishing the two opposing surfaces of the test piece to a thickness of 10 mm and visually observing them.
  • Tg transition temperature
  • a glass molded body can be produced from the produced optical glass by means of mold press molding such as reheat press molding or precision press molding. That is, a preform for mold press molding is prepared from optical glass, and after performing reheat press molding on the preform, polishing is performed to prepare a glass molded body, or for example, polishing is performed.
  • the preform can be precision press-molded to produce a glass molded body.
  • the means for producing the glass molded body is not limited to these means.
  • the glass molded body produced in this manner is useful for various optical elements, and among them, it is particularly preferable to use for optical elements such as lenses and prisms.
  • optical elements such as lenses and prisms.
  • color bleeding due to chromatic aberration in the transmitted light of the optical system provided with the optical element is reduced. Therefore, when this optical element is used in a camera, a photographing object can be expressed more accurately, and when this optical element is used in a projector, a desired image can be projected with higher definition.
  • compositions of Examples (No. 1 to No. 57) and Comparative Examples (No. A to No. D) of the present invention refractive index (n d ), Abbe number ( ⁇ d ), partial dispersion ratio ( ⁇ g F), wavelengths ( ⁇ 5 , ⁇ 70 , ⁇ 80 ) exhibiting spectral transmittances of 5%, 70% and 80%, and transmittance fluctuations before and after the reheating test (a) are shown in Tables 1 to 9. Show.
  • Examples 1 to 42 are examples of the first optical glass.
  • Examples 1, 2, 4 to 11, 13, 14, 16, 20, 23, 30, and 36 to 57 are examples of the second optical glass. The following examples are merely for illustrative purposes, and are not limited to these examples.
  • the glasses of the examples and comparative examples of the present invention are ordinary optical glasses such as oxides, hydroxides, carbonates, nitrates, fluorides, hydroxides, and metaphosphate compounds corresponding to the raw materials of the respective components.
  • the high-purity raw materials used in the above are selected, weighed so as to have the composition ratios of the examples and comparative examples shown in Tables 1 to 9, and mixed uniformly, and then put into a platinum crucible.
  • permeability of the glass of an Example and a comparative example was measured according to Japan Optical Glass Industry Association standard JOGIS02.
  • the presence / absence and degree of coloration of the glass were determined by measuring the transmittance of the glass.
  • a face parallel polished product having a thickness of 10 ⁇ 0.1 mm was measured for a spectral transmittance of 200 to 800 nm in accordance with JISZ8722, and ⁇ 5 (wavelength at a transmittance of 5%), ⁇ 70 (transmittance).
  • the wavelength at 70%) and ⁇ 80 (wavelength at 80% transmittance) were determined.
  • permeability before and after the reheating test (ii) of the glass of an Example and a comparative example was measured as follows.
  • the value obtained by dividing the transmittance of the light beam (d-line) having a wavelength of 587.56 nm of the test piece after the reheating test (b) by the d-line transmittance of the test piece before the reheating test is the reheating test (b).
  • the front and rear glasses were subjected to the Japan Optical Glass Industry Association Standard JOGIS02-2003.
  • the d-line spectral transmittance of a face-parallel polished product having a thickness of 10 ⁇ 0.1 mm was measured in accordance with JISZ8722, and (d-line transmittance after reheating test (ii)) / (reheated)
  • the d-line transmittance before the test (A) was determined, and the change in the maximum transmittance before and after the reheating test (A) was evaluated.
  • the difference between ⁇ 70 which is the wavelength at which the transmittance of the test piece before the reheating test (A) becomes 70%, and ⁇ 70 of the test piece after the reheating test is the same as before and after the reheating test (A).
  • the glass calculated lambda 70 (the wavelength when the transmittance of 70%) in the above test method, the test piece after the reheating test and lambda 70 of reheating test (a) prior to the test piece (a) lambda
  • Tg transition temperature
  • the optical glasses of the examples of the present invention have a partial dispersion ratio ( ⁇ g, F) of ( ⁇ 0.00275 ⁇ ⁇ d + 0.68125) or less when ⁇ d ⁇ 31. More specifically, it was ( ⁇ 0.00275 ⁇ ⁇ d + 0.67991) or less. In the case of ⁇ d > 31, the partial dispersion ratio ( ⁇ g, F) was ( ⁇ 0.00162 ⁇ ⁇ d + 0.64622) or less, more specifically, ( ⁇ 0.00162 ⁇ ⁇ d + 0.64476) or less.
  • the optical glass of the example of the present invention has a partial dispersion ratio ( ⁇ g, F) of ( ⁇ 0.00162 ⁇ ⁇ d + 0.63822) or more, more specifically ( ⁇ 0.00162 ⁇ ⁇ d + 0.64094) or more.
  • ⁇ g, F partial dispersion ratio
  • the glasses of the comparative examples No. A to No.
  • the optical glass of the example of the present invention has a smaller partial dispersion ratio ( ⁇ g, F) in the relational expression with the Abbe number ( ⁇ d ) than the glass of the comparative example.
  • the optical glasses of the examples of the present invention all have a refractive index (n d ) of 1.70 or more, more specifically 1.78 or more, and this refractive index (n d ) of 2.20 or less. More specifically, it was 1.85 or less, and was within a desired range.
  • the optical glasses of the examples of the present invention each have an Abbe number ( ⁇ d ) of 20 or more, more specifically 30 or more, and this Abbe number ( ⁇ d ) of 40 or less, more specifically 34. And within the desired range.
  • the glass of the comparative example of the present invention (No.B) is, [nu d was more than 34. Therefore, it was revealed that the optical glass of the example of the present invention has a smaller Abbe number ( ⁇ d ) than the glass of the comparative example (No. B).
  • the optical glass of the Example of this invention is the value which divided
  • the B) of the present invention has the d-line transmittance of the test piece after the reheating test (ii) and the d-line transmittance of the test piece before the reheating test.
  • the transmittance was less than 70% for all wavelengths of visible light. Therefore, it was clarified that the optical glass of the example of the present invention is less likely to be colored or devitrified by reheating than the glass of the comparative example (No. A, No. B).
  • ⁇ 70 (wavelength at 70% transmittance) was 500 nm or less, and more specifically 407 nm or less.
  • each of ⁇ 5 (wavelength at 5% transmittance) was 420 nm or less, more specifically 359 nm or less.
  • ⁇ 80 (wavelength at 80% transmittance) was 560 nm or less, more specifically 463 nm or less.
  • the optical glass of the example of the present invention has a high visible light transmittance, a low chromatic aberration, and a high press while the refractive index (n d ) and the Abbe number ( ⁇ d ) are within the desired ranges. It became clear that it had moldability.

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)
  • Ceramic Engineering (AREA)
  • Glass Compositions (AREA)

Abstract

Cette invention concerne un verre optique présentant une transparence améliorée vis-à-vis de la lumière visible et ayant un petit nombre d'Abbe (?d) et un bas taux de dispersion partielle (?g,F) tandis que son indice de réfraction (nd) est dans une plage recherchée. Le verre optique selon l'invention contient, par rapport à la quantité totale du verre en termes d'oxydes, 20,0 à 60,0 % d'un composant de SiO2 et plus de 20,0 % à 50,0 % ou moins d'un composant de CaO, un total de plus de 0 % et de 20,0 % ou moins d'un composant de BaO et d'un composant de K2O, et a une teneur en composant Nb2O5 de 30,0 % ou moins, le taux de dispersion partielle (?g,F) et le nombre d'Abbe (?d) satisfaisant la relation (-0,00162×?d+0,63822)=(?g,F)=(-0,00275×?d+0,68125) quand ?d=31 et satisfaisant la relation (-0,00162×?d+0,63822)=(?g,F)=(-0,00162×?d+0,64622) quand ?d>31.
PCT/JP2012/057955 2011-03-29 2012-03-27 Verre optique, préforme, et élément optique Ceased WO2012133420A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012800159905A CN103476722A (zh) 2011-03-29 2012-03-27 光学玻璃、预成型坯以及光学元件

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2011073356A JP2012206891A (ja) 2011-03-29 2011-03-29 光学ガラス、プリフォーム及び光学素子
JP2011073357A JP2012206892A (ja) 2011-03-29 2011-03-29 光学ガラス、プリフォーム及び光学素子
JP2011-073356 2011-03-29
JP2011-073357 2011-03-29

Publications (1)

Publication Number Publication Date
WO2012133420A1 true WO2012133420A1 (fr) 2012-10-04

Family

ID=46931136

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/057955 Ceased WO2012133420A1 (fr) 2011-03-29 2012-03-27 Verre optique, préforme, et élément optique

Country Status (3)

Country Link
CN (1) CN103476722A (fr)
TW (1) TW201245078A (fr)
WO (1) WO2012133420A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113165954A (zh) * 2018-11-30 2021-07-23 日本光硝子株式会社 光学玻璃、光学元件、光学系统、更换镜头和光学装置
CN115335339A (zh) * 2020-03-24 2022-11-11 株式会社小原 化学强化光学玻璃
US11802073B2 (en) 2020-09-10 2023-10-31 Corning Incorporated Silicoborate and borosilicate glasses with high refractive index and low density
US11976004B2 (en) 2020-09-10 2024-05-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
US11999651B2 (en) 2020-09-10 2024-06-04 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN111170631A (zh) * 2016-09-05 2020-05-19 成都光明光电股份有限公司 重镧火石玻璃
CN107555784B (zh) * 2017-08-04 2020-06-23 苏州端景光电仪器有限公司 一种含铯光学玻璃及其制备方法与应用
CN109956666B (zh) * 2017-12-22 2023-01-06 Hoya株式会社 光学玻璃和光学元件
CN111977974A (zh) * 2020-09-08 2020-11-24 成都光明光电股份有限公司 光学玻璃、光学预制件、光学元件和光学仪器
CN111892298A (zh) * 2020-09-08 2020-11-06 成都光明光电股份有限公司 光学玻璃、光学预制件及光学元件
CN117023977B (zh) * 2023-07-26 2026-02-10 成都光明光电股份有限公司 光学玻璃、光学元件及光学仪器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5751149A (en) * 1980-07-14 1982-03-25 Jenaer Glaswerk Schott & Gen Acid-resistant hydrolysis-resistant low density optical and ophthalmic glass
JPS62132741A (ja) * 1985-11-29 1987-06-16 コ−ニング　グラス　ワ−クス 光学および眼用ガラス
WO2009096437A1 (fr) * 2008-01-31 2009-08-06 Hoya Corporation Verre optique
WO2011016566A1 (fr) * 2009-08-07 2011-02-10 株式会社オハラ Verre optique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590888A1 (fr) * 1985-11-29 1987-06-05 Corning Glass Works Verres a usage ophtalmique de faible dispersion, de faible densite et a indice de refraction eleve
JP5545917B2 (ja) * 2008-01-31 2014-07-09 株式会社オハラ 光学ガラス

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5751149A (en) * 1980-07-14 1982-03-25 Jenaer Glaswerk Schott & Gen Acid-resistant hydrolysis-resistant low density optical and ophthalmic glass
JPS62132741A (ja) * 1985-11-29 1987-06-16 コ−ニング　グラス　ワ−クス 光学および眼用ガラス
WO2009096437A1 (fr) * 2008-01-31 2009-08-06 Hoya Corporation Verre optique
WO2011016566A1 (fr) * 2009-08-07 2011-02-10 株式会社オハラ Verre optique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113165954A (zh) * 2018-11-30 2021-07-23 日本光硝子株式会社 光学玻璃、光学元件、光学系统、更换镜头和光学装置
CN115335339A (zh) * 2020-03-24 2022-11-11 株式会社小原 化学强化光学玻璃
US11802073B2 (en) 2020-09-10 2023-10-31 Corning Incorporated Silicoborate and borosilicate glasses with high refractive index and low density
US11976004B2 (en) 2020-09-10 2024-05-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
US11999651B2 (en) 2020-09-10 2024-06-04 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density
US12187644B2 (en) 2020-09-10 2025-01-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
US12195389B2 (en) 2020-09-10 2025-01-14 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density

Also Published As

Publication number Publication date
TW201245078A (en) 2012-11-16
CN103476722A (zh) 2013-12-25

Similar Documents

Publication Publication Date Title
JP5767179B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP6014301B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP5721534B2 (ja) 光学ガラス、プリフォーム及び光学素子
WO2012133420A1 (fr) Verre optique, préforme, et élément optique
JP7195040B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP6611299B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP2012206893A (ja) 光学ガラス、プリフォーム及び光学素子
JP2016088758A (ja) 光学ガラス、プリフォーム及び光学素子
WO2011052687A1 (fr) Verre optique, préforme, et élément optique
JP2022167990A (ja) 光学ガラス、プリフォーム及び光学素子
JP5863745B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP5783977B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP5706231B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP2012240907A (ja) 光学ガラス、プリフォーム及び光学素子
JP2017119619A (ja) 光学ガラス、プリフォーム及び光学素子
WO2012133421A1 (fr) Verre optique, préforme, et élément optique
JP2015193515A (ja) 光学ガラス、プリフォーム及び光学素子
JP2014080317A (ja) 光学ガラス、プリフォーム及び光学素子
JP2012206891A (ja) 光学ガラス、プリフォーム及び光学素子
JP5748613B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP2017088484A (ja) 光学ガラス、プリフォーム及び光学素子
JP5748614B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP2017088486A (ja) 光学ガラス、プリフォーム及び光学素子
JP2017088485A (ja) 光学ガラス、プリフォーム及び光学素子
TWI549920B (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: 12763643

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12763643

Country of ref document: EP

Kind code of ref document: A1