WO2011052687A1 - Verre optique, préforme, et élément optique - Google Patents

Verre optique, préforme, et élément optique Download PDF

Info

Publication number
WO2011052687A1
WO2011052687A1 PCT/JP2010/069186 JP2010069186W WO2011052687A1 WO 2011052687 A1 WO2011052687 A1 WO 2011052687A1 JP 2010069186 W JP2010069186 W JP 2010069186W WO 2011052687 A1 WO2011052687 A1 WO 2011052687A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
glass
mass
optical glass
oxide
Prior art date
Application number
PCT/JP2010/069186
Other languages
English (en)
Japanese (ja)
Inventor
敦 永岡
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 CN2010800485500A priority Critical patent/CN102596835A/zh
Publication of WO2011052687A1 publication Critical patent/WO2011052687A1/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
    • 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
    • C03C3/062—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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • 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

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, chromatic aberration strongly depends 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.
  • 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 this straight line 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 that contains a Bi 2 O 3 component as a main component and focuses attention on the partial dispersion ratio ( ⁇ g, F) of the glass
  • optical glasses shown in Patent Documents 1 and 2 are known.
  • the optical glass disclosed in Patent Documents 1 and 2 has a sufficient refractive index. Therefore, in order to reduce the number of optical elements used in the optical system, reduce the thickness of the optical elements, and meet the demands for high precision, light weight, and miniaturization of the optical system, the refractive index is further increased. There is a need.
  • a glass containing a Bi 2 O 3 component as a main component is often colored yellow or orange, and the transmittance for light having a wavelength in the visible region is often lost. Therefore, there is a demand for an optical glass having both a high partial dispersion ratio ( ⁇ g, F), a high refractive index, and high transparency with respect to light having a wavelength in the visible region.
  • the present invention has been made in view of the above problems, and the object of the present invention is an optical glass containing Bi 2 O 3 while having a very high partial dispersion ratio ( ⁇ g, F).
  • An object of the present invention is to obtain an optical glass that is highly transparent to visible light and that can reduce the size of elements and optical systems, and a preform using the optical glass.
  • the present inventors have set the partial dispersion ratio ( ⁇ g, F) of the glass by making at least the content of Bi 2 O 3 within a predetermined range. While increasing, it has been found that the transmittance of the glass for light on the short wavelength side in the visible region is increased and the refractive index (nd) of the glass is increased, and the present invention has been completed. Specifically, the present invention provides the following.
  • Optical glass that is:
  • optical glass according to any one of (1) to (5), further comprising:
  • the mass sum of the oxide component based on the mass% of the RO component (wherein R is one or more selected from the group consisting of Mg, Ca, Sr, Ba and Zn) is 30.0%.
  • R is one or more selected from the group consisting of Mg, Ca, Sr, Ba and Zn.
  • the mass sum of the Rn 2 O component (wherein Rn is at least one selected from the group consisting of Li, Na, K, Rb, and Cs) in terms of mass% based on oxide is 5.
  • the mass sum of the Ln 2 O 3 component (wherein Ln is one or more selected from the group consisting of La, Gd, Y, and Yb) in terms of mass% based on oxide is 20.0. % Or less of the optical glass according to (13).
  • a preform for polishing and / or precision press molding comprising the optical glass according to any one of (1) to (15).
  • the partial dispersion ratio ( ⁇ g, F) of the glass is increased, but the light on the short wavelength side in the visible region is increased.
  • the transmittance of the glass is increased and the refractive index (nd) of the glass is increased. Therefore, an optical glass that has a very large partial dispersion ratio ( ⁇ g, F), has high transparency to visible light, and can be miniaturized in elements and optical systems, and a preform using the optical glass Can be obtained.
  • the optical glass of the present invention contains a SiO 2 component and / or a B 2 O 3 component, contains a Bi 2 O 3 component in an amount of 40.0% or more and 90.0% or less by mass% based on the oxide, and is partially dispersed.
  • a wavelength ( ⁇ 5 ) having a spectral transmittance of 5% in a sample having a ratio ( ⁇ g, F) of 0.63 or more, an Abbe number ( ⁇ d) of 27 or less, and a thickness of 10 mm is 460 nm or less.
  • the transmittance of the glass with respect to light on the short wavelength side in the visible region (hereinafter, referred to as “glass partial transmittance ratio ( ⁇ g, F)”) is increased. , which may be simply referred to as transmittance), and the refractive index (nd) of the glass is increased. For this reason, an optical glass that has a very high partial dispersion ratio ( ⁇ g, F), has high transparency to visible light, and can reduce the size of elements and optical systems, and renovation can be obtained.
  • each component constituting the optical glass of the present invention is described below. Unless otherwise specified, the content of each component is expressed in terms of mass% based on oxide.
  • the “oxide standard” means that when oxides, composite salts, metal fluorides, etc. used as raw materials for the glass constituents of the present invention are all decomposed during melting and changed to oxides, It is the composition which described each component contained in glass by making the sum total of the mass of the said produced
  • the total amount of F in which a part or all of the oxide is fluoride-substituted is the fluorine content that may be present in the glass composition of the present invention, based on the oxide-based composition of 100%. This is expressed in mass% when calculated as F atoms.
  • the Bi 2 O 3 component is a component that increases the partial dispersion ratio ( ⁇ g, F) of the glass, increases the refractive index (nd) of the glass, and is effective for reducing the dispersion of the glass. Further, it is a component that is also effective for lowering Tg and improving water resistance, and is an essential component of the glass of the present invention.
  • the content of Bi 2 O 3 component than 40.0%, it is possible to easily obtain the above-mentioned technical effect.
  • an optical glass having a desired high refractive index (nd) can be easily obtained.
  • the content of the Bi 2 O 3 component is 90.0% or less, and more preferably less than 85.0%, the stability of the glass is enhanced, so that the coloring of the glass can be reduced. Therefore, the content of the Bi 2 O 3 component is in mass% based on the oxide, preferably 40.0%, more preferably 50.0%, and most preferably 67.0%.
  • the content of the Bi 2 O 3 component is preferably 90.0%, more preferably 88.0%, and most preferably less than 85.0%.
  • the Bi 2 O 3 component can be contained in the glass using, for example, Bi 2 O 3 as a raw material.
  • the SiO 2 component is a component that improves the stability of the glass and reduces devitrification, and has the effect of reducing the dispersion of the glass and the effect of improving the transmittance.
  • the optical glass of the present invention Is an optional component.
  • the content of the SiO 2 component is, by mass% based on oxide, preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • SiO 2 component may be contained in the glass by using as a raw material such as SiO 2, K 2 SiF 6, Na 2 SiF 6 or the like.
  • the B 2 O 3 component is a component having an effect of improving the stability of the glass to reduce devitrification and maintaining a high partial dispersion ratio ( ⁇ g, F) of the glass.
  • the content of the B 2 O 3 component is in mass% based on the oxide, preferably 30.0%, more preferably 23.0%, and most preferably 15.0%.
  • the B 2 O 3 component can be contained in the glass using, for example, H 3 BO 3 , Na 2 B 4 O 7 , Na 2 B 4 O 7 .10H 2 O, BPO 4 or the like as a raw material.
  • the SiO 2 component and the B 2 O 3 component do not necessarily need to be contained, but these are glass-forming components and components that can reduce devitrification, so that at least one of them is contained in excess of 0%. Preferably it is. However, if these contents are too large, it is difficult to obtain a desired partial dispersion ratio ( ⁇ g, F) and Abbe number ( ⁇ d). Therefore, the mass sum of the SiO 2 component and the B 2 O 3 component is mass% based on the oxide, preferably more than 0%, more preferably 0.5%, and most preferably 1.0%. . On the other hand, the mass sum of the SiO 2 component and the B 2 O 3 component is preferably 50.0%, more preferably 45.0%, and most preferably 35.0%.
  • the TiO 2 component is a component that increases the refractive index (nd), dispersion, and partial dispersion ratio ( ⁇ g, F) of the glass.
  • nd refractive index
  • ⁇ g, F partial dispersion ratio
  • the content of the TiO 2 component is mass% based on the oxide, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • TiO 2 component may be contained in the glass by using as the starting material for example TiO 2 or the like.
  • the Nb 2 O 5 component is a useful component for improving the refractive index (nd) and the partial dispersion ratio ( ⁇ g, F) of the glass.
  • the content of the Nb 2 O 5 component is mass% based on the oxide, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the Nb 2 O 5 component can be contained in the glass using, for example, Nb 2 O 5 as a raw material.
  • the TiO 2 component and the Nb 2 O 5 component do not necessarily have to be contained, but it is high by using a predetermined amount of the Bi 2 O 3 component and the TiO 2 component and / or the Nb 2 O 5 component in combination.
  • the partial dispersion ratio ( ⁇ g, F) of the glass can be further increased while maintaining the transmittance. Accordingly, the total content of the TiO 2 component and the Nb 2 O 5 component is, in terms of mass% based on the oxide, preferably more than 0%, more preferably 0.5%, and most preferably 0.9%. To do.
  • the total content of the TiO 2 component and the Nb 2 O 5 component is mass% based on the oxide, preferably 15.0%, more preferably 10.0%, and most preferably 5.0%. To do.
  • the MgO component is a component useful for reducing dispersion of glass and improving devitrification resistance, and is an optional component of the optical glass of the present invention.
  • the content of the MgO component is preferably 20.0%, more preferably 15.0%, and most preferably 10.0% in terms of mass% based on the oxide.
  • the MgO component can be contained in the glass using, for example, MgO, MgCO 3 , MgF 2 or the like as a raw material.
  • the CaO component is a component useful for reducing the dispersion of glass and improving devitrification resistance and chemical durability, and is an optional component of the optical glass of the present invention.
  • the content of the CaO component is mass% based on the oxide, preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • the CaO component can be contained in the glass using, for example, CaCO 3 , CaF 2 or the like as a raw material.
  • the SrO component is a component useful for improving the devitrification resistance of the glass, and is an optional component of the optical glass of the present invention.
  • the content of the SrO component is preferably 20.0%, more preferably 15.0%, and most preferably 10.0% in terms of mass% based on the oxide.
  • the SrO component can be contained in the glass using, for example, Sr (NO 3 ) 2 , SrF 2 or the like as a raw material.
  • the BaO component is a component useful for improving the devitrification resistance of the glass, and is an optional component of the optical glass of the present invention.
  • the upper limit of the content of the BaO component is 20.0%, more preferably 15.0%, and most preferably 10.0% in terms of mass% based on the oxide.
  • the BaO component can be contained in the glass using, for example, BaCO 3 , Ba (NO 3 ) 2 or the like as a raw material.
  • the ZnO component is a useful component for increasing the stability of the glass to reduce the coloration and improving the devitrification resistance while keeping the partial dispersion ratio ( ⁇ g, F) of the glass high. It is an optional component of the optical glass. However, if the content of the ZnO component is too large, the Abbe number ( ⁇ d) tends to increase. Therefore, the upper limit of the content of the ZnO component is preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • An optical glass having desired characteristics in the present invention can be produced without containing a ZnO component. However, by containing a ZnO component, the glass has a partial dispersion ratio ( ⁇ g, F) and an Abbe number ( ⁇ d). Adjustment can be made easily.
  • the content of the ZnO component is, in terms of mass% based on the oxide, preferably exceeding 0%, more preferably 0.5%, and most preferably 1.0%.
  • the ZnO component can be contained in the glass using, for example, ZnO, ZnF 2 or the like as a raw material.
  • the RO component (R is one or more selected from Mg, Ca, Sr, Ba, Zn) has all physical properties such as devitrification resistance, dispersion, and mechanical strength of the glass. It is a useful component for adjusting. However, if the total content of RO components is too large, it becomes difficult to obtain a desired partial dispersion ratio ( ⁇ g, F) and Abbe number ( ⁇ d). Therefore, the total content of RO components is preferably 35.0%, more preferably 30.0%, and most preferably 25.0%.
  • the optical glass which has the desired characteristic in this invention
  • the partial dispersion ratio ( ⁇ g, F) and the Abbe number ( ⁇ d) can be easily adjusted. Accordingly, the total content of the RO component is, in mass% based on the oxide, preferably exceeding 0%, more preferably 1.0%, and most preferably 2.0%.
  • the mass sum (SrO + ZnO) with respect to the mass sum of the RO component (wherein R is one or more selected from the group consisting of Mg, Ca, Sr, Ba and Zn).
  • the mass ratio is preferably 0.40 or more. This increases the proportion of SrO component and ZnO component that hardly affect the transmittance of the glass among the RO components that enhance the stability of the glass. Glass with high transparency to light can be obtained. This tendency becomes particularly remarkable when the mass ratio is 0.70 or more. Therefore, the mass ratio (SrO + ZnO) / RO based on oxide is preferably 0.40, more preferably 0.60, and most preferably 0.70.
  • the Li 2 O component is a component that improves the stability of the glass to reduce devitrification and coloring, and is an effective component for lowering the glass Tg, and is an optional component of the optical glass of the present invention.
  • the upper limit of the content of the Li 2 O component is 10.0% by mass, preferably 10.0%, more preferably 8.0%, and most preferably 5.0%.
  • the Li 2 O component can be contained in the glass using, for example, Li 2 CO 3 , LiNO 3 , LiF or the like as a raw material.
  • Na 2 O component the partial dispersion ratio of glass ([theta] g, F) and a component capable of adjusting the Abbe number ([nu] d), are optional components of the optical glass of the present invention.
  • the content of Na 2 O component is mass% based on the oxide, preferably 10.0%, more preferably 8.0%, and most preferably 5.0%.
  • the Na 2 O component can be contained in the glass using, for example, Na 2 CO 3 , NaNO 3 , NaF, Na 2 SiF 6 or the like as a raw material.
  • K 2 O component the partial dispersion ratio of glass ([theta] g, F) and a component capable of adjusting the Abbe number ([nu] d), are optional components of the optical glass of the present invention.
  • the upper limit of the content of the K 2 O component is, based on oxide, mass%, preferably 10.0%, more preferably 8.0%, and most preferably 5.0%.
  • the K 2 O component can be contained in the glass using, for example, K 2 CO 3 , KNO 3 , KF, KHF 2 , K 2 SiF 6 or the like as a raw material.
  • the Rb 2 O component and the Cs 2 O component are components that can adjust the partial dispersion ratio ( ⁇ g, F) and Abbe number ( ⁇ d) of the glass, and are optional components of the optical glass of the present invention. However, when these are contained excessively, the chemical durability and the mechanical strength are likely to be lowered like the other alkali metal components.
  • the Rb 2 O component is low in output and is not suitable for optical glass materials. Accordingly, the content of each of the Rb 2 O component and the Cs 2 O component is preferably 5.0%, more preferably 4.0%, and most preferably 3.0% as the upper limit of mass% based on the oxide.
  • the mass sum of the contents of the Rn 2 O component may be 5.0% or less. preferable.
  • the stability of the glass can be further increased and the decrease in transmittance can be suppressed while adjusting the Abbe number ( ⁇ d) of the glass to a desired range.
  • the content of the Rn 2 O component (Rn is at least one selected from Li, Na, K, Rb, and Cs) is preferably 5.0%, more preferably 3.0%, and most preferably 1.
  • the upper limit is 6%.
  • the La 2 O 3 component, Gd 2 O 3 component, Y 2 O 3 component, and Yb 2 O 3 component are optional components that adjust the dispersion of the glass to a low level.
  • the content of each of the La 2 O 3 component, the Gd 2 O 3 component, the Y 2 O 3 component, and the Yb 2 O 3 component is mass% based on the oxide, preferably 10.0%, more preferably The upper limit is 8.0%, and most preferably 6.0%.
  • the mass sum of the Ln 2 O 3 component (wherein Ln is one or more selected from the group consisting of La, Gd, Y and Yb) is mass% based on the oxide, preferably 20 0.0%, more preferably 10.0%, and still more preferably 6.0%. In particular, it is most preferable that the mass sum of the Ln 2 O 3 component is less than 1.0% because the coloring of the glass can be further reduced.
  • La 2 O 3 component of the glass, Gd 2 O 3 component, Y 2 O 3 component and Yb 2 O 3 component is, for example, as raw materials La 2 O 3, La (NO 3) 3 ⁇ XH 2 O (X is any Integer), Gd 2 O 3 , GdF 3 , Y 2 O 3 , YF 3 , Yb 2 O 3 and the like can be used.
  • the GeO 2 component is an optional component useful for improving the devitrification resistance of the glass.
  • the content of the GeO 2 component is, by mass% based on oxide, preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • the GeO 2 component can be contained in the glass using, for example, GeO 2 as a raw material.
  • the P 2 O 5 component is an optional component useful for improving the transmittance of glass.
  • the upper limit of the content of the P 2 O 5 component is an oxide-based mass%, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the P 2 O 5 component contains, for example, Al (PO 3 ) 3 , Ca (PO 3 ) 2 , Ba (PO 3 ) 2 , Na (PO 3 ), BPO 4 , H 3 PO 4, and the like as raw materials. It can contain.
  • the Al 2 O 3 component is an optional component useful for improving the chemical durability and mechanical strength of the glass.
  • the content of Al 2 O 3 component is too large, the melting property of the glass tends to decrease. Therefore, the content of the Al 2 O 3 component is mass% based on the oxide, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the Al 2 O 3 component can be contained in the glass using, for example, Al 2 O 3 , Al (OH) 3 , AlF 3 or the like as a raw material.
  • the ZrO 2 component is an optional component useful for improving the chemical durability and mechanical strength of glass.
  • the content of the ZrO 2 component is mass% based on the oxide, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the ZrO 2 component can be contained in the glass using, for example, ZrO 2 , ZrF 4 or the like as a raw material.
  • the Ta 2 O 5 component is an optional component useful for improving the stability of the glass.
  • the content of the Ta 2 O 5 component is mass% based on the oxide, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the Ta 2 O 5 component can be contained in the glass using, for example, Ta 2 O 5 as a raw material.
  • the WO 3 component is an optional component useful for improving the partial dispersion ratio ( ⁇ g, F) of the glass and reducing the Tg.
  • the upper limit of the content of the WO 3 component is 10.0% by mass, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the WO 3 component can be contained in the glass using, for example, WO 3 as a raw material.
  • the TeO 2 component is an optional component that has an effect of promoting glass clarification. However, when there is too much the content, the devitrification resistance of glass will fall easily. Therefore, the content of the TeO 2 component is, by mass% based on the oxide, preferably 20.0%, more preferably 15.0%, and most preferably 10.0%.
  • the TeO 2 component can be contained in the glass using, for example, TeO 2 as a raw material.
  • the Tl 2 O 3 component is an optional component useful for adjusting the partial dispersion ratio ( ⁇ g, F) and Abbe number ( ⁇ d) of the glass.
  • the content of the Tl 2 O 3 component is mass% based on the oxide, preferably 10.0%, more preferably 5.0%, and most preferably 3.0%.
  • the Tl 2 O 3 component can be contained in the glass using, for example, Tl 2 O 3 as a raw material.
  • the CeO 2 component is an optional component that increases the partial dispersion ratio ( ⁇ g, F) of the glass. However, if the content is too large, the glass is colored and the transmittance tends to decrease. Therefore, the content of the CeO 2 component is preferably 3.0%, more preferably 2.0%, and even more preferably 1.0% by mass% based on the oxide. Most preferably, it is substantially free of CeO 2 component.
  • the CeO 2 component can be contained in the glass using, for example, CeO 2 as a raw material.
  • the Sb 2 O 3 component is an optional component that has an effect of promoting clarification of glass. However, when there is too much the content, the devitrification resistance of glass will fall. Therefore, the content of the Sb 2 O 3 component is expressed by mass% based on the oxide, preferably 3.0%, more preferably 2.0%, and most preferably 1.0%.
  • the Sb 2 O 3 component can be contained in the glass using, for example, Sb 2 O 3 , Sb 2 O 5 , Na 2 H 2 Sb 2 O 7 ⁇ 5H 2 O, or the like 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 .
  • the F component is an effective component for reducing the glass dispersion and improving the meltability.
  • the total amount of F in which part or all of the oxide is fluoride-substituted is preferably 10.0%, more preferably 5.0%, and more preferably 1.0%.
  • the F component can be contained in the glass using, for example, ZrF 4 , AlF 3 , NaF, CaF 2 or the like as a raw material.
  • the optical glass of the present invention does not substantially contain the above components.
  • substantially does not contain means that it is not contained artificially unless it is mixed as an impurity.
  • 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 preferably used as the optical glass of the present invention cannot be expressed directly in the description of mol% because its composition is expressed by mass% based on the oxide, but it exhibits various properties required in the present invention.
  • the composition represented by mol% of each component present in the glass composition to be filled generally takes the following values on an oxide basis.
  • 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 in a quartz crucible or a gold crucible and melted in a temperature range of 750 ° C. to 950 ° C. for 2 to 3 hours. Then, the mixture is stirred and homogenized, and after about 1 hour has passed since the temperature is lowered to about 800 to 650 ° C., it is cast into a mold and gradually cooled.
  • the optical glass of the present invention has a high partial dispersion ratio ( ⁇ g, F). More specifically, the partial dispersion ratio ( ⁇ g, F) of the optical glass of the present invention is preferably 0.63, more preferably 0.64, and most preferably 0.65. As a result, an optical glass having a large abnormal partial dispersion ( ⁇ g, F) can be obtained, so that a remarkable effect can be obtained in correcting chromatic aberration of the optical element, and the degree of freedom in optical design can be expanded.
  • the upper limit of the partial dispersion ratio ( ⁇ g, F) of the optical glass of the present invention is not particularly limited, but is generally 0.70 or less, more specifically 0.69 or less, and more specifically 0.68 or less. There are often.
  • the optical glass of this invention has little coloring.
  • the wavelength ( ⁇ 70 ) showing a spectral transmittance of 70% in a sample having a thickness of 10 mm is 600 nm or less, more preferably 580 nm or less, and most preferably. Is 550 nm or less.
  • the wavelength ( ⁇ 5 ) exhibiting a spectral transmittance of 5% is 460 nm or less, more preferably 455 nm or less, further preferably 440 nm or less, and most preferably 432 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 a high refractive index and high dispersion (low Abbe number). More specifically, the refractive index (n d ) of the optical glass of the present invention is preferably 1.90, more preferably 2.10, still more preferably 2.13, and most preferably 2.15. .
  • the upper limit of the refractive index (n d ) of the optical glass of the present invention is not particularly limited, but is generally 2.40 or less, more specifically 2.35 or less, and more specifically 2.30 or less. There are often.
  • the upper limit of the Abbe number ( ⁇ d ) of the optical glass of the present invention is preferably 27, more preferably 25, and most preferably 20.
  • the lower limit of the Abbe number ( ⁇ d ) of the optical glass of the present invention is not particularly limited, but is generally about 10 or more, more specifically 12 or more, and more specifically 14 or more.
  • 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 entire optical system can be reduced in size.
  • a glass molded body can be produced from the produced optical glass using means 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 this preform, a glass molded body is manufactured by polishing, for example, polishing is performed. A glass molded body can be produced by precision press-molding the produced preform.
  • the glass molded body made of the optical glass of the present invention can be used for applications of optical elements such as lenses, prisms, and mirrors, and can be typically used for digital cameras and projectors.
  • the means for producing the glass molded body is not limited to these means.
  • compositions of Examples (No. 1 to No. 91) and Comparative Examples (No. 1) of the present invention refractive index (n d ), Abbe number ( ⁇ d ), partial dispersion ratio ( ⁇ g, F), Tables 1 to 10 show the results of the anomalous partial dispersion ( ⁇ g, F) and the wavelengths ( ⁇ 70 , ⁇ 5 ) showing the spectral transmittances of 70% and 5%.
  • refractive index (n d ) refractive index
  • ⁇ d Abbe number
  • ⁇ g, F partial dispersion ratio
  • Tables 1 to 10 show the results of the anomalous partial dispersion ( ⁇ g, F) and the wavelengths ( ⁇ 70 , ⁇ 5 ) showing the spectral transmittances of 70% and 5%.
  • the glasses of Examples (No. 1 to No. 91) and Comparative Examples (No. 1) of the present invention are all oxides, hydroxides, carbonates, nitrates, fluorides corresponding to the raw materials of the respective components.
  • a high-purity raw material used for ordinary optical glass such as hydroxide, metaphosphoric acid compound, etc. is selected, and the glass weight is 400 g with the compositions of the examples and comparative examples shown in Tables 1 to 10.
  • the refractive index (n d ), Abbe number ( ⁇ d ), and partial dispersion ratio ( ⁇ g, F) of the glass of Examples (No. 1 to No. 91) and Comparative Example (No. 1) are as follows: Measurements were made based on Japan Optical Glass Industry Association Standard JOGIS01-2003. Then, the abnormal partial dispersion ( ⁇ g, F) representing the magnitude of the deviation from the normal line was determined for the obtained Abbe number ( ⁇ d ) and partial dispersion ratio ( ⁇ g, F). The glass used in this measurement was a glass that had been treated in a slow cooling furnace at a slow cooling rate of ⁇ 25 ° C./hr.
  • the transmittances of the glasses of Examples (No. 1 to No. 91) and Comparative Examples (No. 1) were 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 and ⁇ 70 (wavelengths at 5% and 70% transmittance).
  • the optical glass of the examples of the present invention had a partial dispersion ratio ( ⁇ g, F) of 0.63 or more, more specifically 0.66 or more.
  • the partial dispersion ratio ( ⁇ g, F) of the optical glass of the example of the present invention was 0.70 or less, more specifically 0.68 or less. Therefore, it became clear that the optical glass of the example of the present invention has a desired large partial dispersion ratio ( ⁇ g, F).
  • the optical glass of the example of the present invention had an abnormal partial dispersion ( ⁇ g, F) of 0.05 or more. Therefore, it was also revealed that the optical glass of the example of the present invention has a desired large anomalous partial dispersion ( ⁇ g, F).
  • ⁇ 5 (wavelength at 5% transmittance) was 460 nm or less, more specifically, 429 nm or less.
  • ⁇ 70 (wavelength at 70% transmittance) was 600 nm or less, more specifically, 550 nm or less.
  • the glass of the comparative example had a ⁇ 5 larger than 440 nm. For this reason, it became clear that the optical glass of the Example of this invention was hard to color compared with the glass of a comparative example.
  • the optical glasses of the examples of the present invention all had a refractive index (n d ) of 1.90 or more, more specifically 2.09 or more, and were within a desired range.
  • the refractive index (n d ) was 2.13 or more.
  • the refractive index (n d ) was 2.40 or less, more specifically 2.18 or less, and was within a desired range.
  • the optical glasses of the examples of the present invention all have an Abbe number ( ⁇ d ) of 10 or more, more specifically 16 or more, and the Abbe number ( ⁇ d ) of 27 or less, more specifically 18 And within the desired range.
  • the optical glass of the example of the present invention has a high refractive index (n d ) and high dispersion (low Abbe number ⁇ d ) while having a very large partial dispersion ratio ( ⁇ g, F), and It became clear that the transparency with respect to the light of the wavelength of visible region was high.

Landscapes

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

Abstract

Cette invention concerne : un verre optique contenant du Bi2O3 qui a un taux de dispersion partielle (θg, F) extrêmement élevé, une transparence élevée dans la lumière visible, et permet la miniaturisation des éléments et des systèmes optiques; et une préforme obtenue à partir dudit verre optique. Le verre optique selon l'invention contient un composant SiO2 et/ou un composant B2O3, le composant Bi2O3 étant présent suivant une quantité comprise entre 40,0 et 90,0 % en poids, y compris, en terme de teneur d'oxyde. Le taux de dispersion partielle (θg, F) dudit verre optique est supérieur ou égal à 0,63, son indice de réfraction (nd) est supérieur ou égal à 1,90, et son nombre d'Abbe (νd) est inférieur ou égal à 27, la longueur d'onde (λ5) à laquelle un échantillon de 10 mm d'épaisseur du verre optique présente un facteur spectral de transmission de 5 %, étant inférieure ou égale à 460 nm.
PCT/JP2010/069186 2009-10-28 2010-10-28 Verre optique, préforme, et élément optique WO2011052687A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010800485500A CN102596835A (zh) 2009-10-28 2010-10-28 光学玻璃、预成型坯及光学元件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009247840A JP2011093731A (ja) 2009-10-28 2009-10-28 光学ガラス、プリフォーム及び光学素子
JP2009-247840 2009-10-28

Publications (1)

Publication Number Publication Date
WO2011052687A1 true WO2011052687A1 (fr) 2011-05-05

Family

ID=43922109

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/069186 WO2011052687A1 (fr) 2009-10-28 2010-10-28 Verre optique, préforme, et élément optique

Country Status (4)

Country Link
JP (1) JP2011093731A (fr)
KR (1) KR20120098748A (fr)
CN (1) CN102596835A (fr)
WO (1) WO2011052687A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102718567A (zh) * 2012-06-12 2012-10-10 卡罗比亚釉料（昆山）有限公司 一种不含铅的粉红制陶用的熔块
WO2012143452A1 (fr) * 2011-04-21 2012-10-26 Schott Ag Verre optique à indice de réfraction élevé
CN102765881A (zh) * 2011-05-02 2012-11-07 株式会社小原 光学玻璃、预成型体、及光学元件

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012236756A (ja) * 2011-04-28 2012-12-06 Ohara Inc 光学ガラス、プリフォーム及び光学素子
KR101255020B1 (ko) 2011-06-02 2013-04-16 주식회사 이글래스 정밀몰드 성형이 가능한 비구면 렌즈용 광학유리 조성물 및 그것을 이용한 광학유리 제조방법 및 그 제품
JP2013087009A (ja) * 2011-10-17 2013-05-13 Ohara Inc 光学ガラス、プリフォーム及び光学素子
JP2014015383A (ja) * 2012-06-15 2014-01-30 Ohara Inc 光学ガラス、プリフォーム、及び光学素子
JP2014015384A (ja) * 2012-06-15 2014-01-30 Ohara Inc 光学ガラス、プリフォーム、及び光学素子
JP6537806B2 (ja) * 2014-10-29 2019-07-03 株式会社オハラ 赤外線透過ガラス、光学素子及びプリフォーム
KR102215135B1 (ko) * 2019-04-12 2021-02-10 주식회사 베이스 유리 조성물 및 이를 포함하는 색변환 유리

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10139478A (ja) * 1996-02-15 1998-05-26 Asahi Glass Co Ltd 封着用組成物
JP2007099610A (ja) * 2005-09-06 2007-04-19 Ohara Inc 光学ガラス
JP2007246311A (ja) * 2006-03-14 2007-09-27 Ohara Inc ガラス組成物
JP2008001531A (ja) * 2006-06-20 2008-01-10 Ohara Inc ガラス
JP2009120462A (ja) * 2007-11-19 2009-06-04 Asahi Glass Co Ltd 色素増感型太陽電池製造用無鉛ガラスおよびガラスセラミックス組成物

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4158369B2 (ja) * 2000-10-23 2008-10-01 旭硝子株式会社 プレス成形用ガラスおよびレンズ
JP4671263B2 (ja) * 2001-09-10 2011-04-13 ショット アクチエンゲゼルシャフト 酸化ゲルマニウムを含有する酸化ビスマスガラス
JP4590386B2 (ja) * 2006-10-23 2010-12-01 株式会社オハラ 光学ガラス
JP2009203135A (ja) * 2008-02-28 2009-09-10 Ohara Inc 光学ガラス、光学素子及び精密プレス成形用プリフォーム
WO2009107612A1 (fr) * 2008-02-28 2009-09-03 旭硝子株式会社 Verre optique
JP5652991B2 (ja) * 2008-03-25 2015-01-14 株式会社オハラ 光学ガラス
JP5650371B2 (ja) * 2008-04-29 2015-01-07 株式会社オハラ 光学ガラス
JP2009286673A (ja) * 2008-05-30 2009-12-10 Ohara Inc 光学ガラス、プリフォーム、及び光学素子
CN102015562A (zh) * 2009-04-17 2011-04-13 株式会社小原 光学玻璃

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10139478A (ja) * 1996-02-15 1998-05-26 Asahi Glass Co Ltd 封着用組成物
JP2007099610A (ja) * 2005-09-06 2007-04-19 Ohara Inc 光学ガラス
JP2007246311A (ja) * 2006-03-14 2007-09-27 Ohara Inc ガラス組成物
JP2008001531A (ja) * 2006-06-20 2008-01-10 Ohara Inc ガラス
JP2009120462A (ja) * 2007-11-19 2009-06-04 Asahi Glass Co Ltd 色素増感型太陽電池製造用無鉛ガラスおよびガラスセラミックス組成物

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012143452A1 (fr) * 2011-04-21 2012-10-26 Schott Ag Verre optique à indice de réfraction élevé
CN102765881A (zh) * 2011-05-02 2012-11-07 株式会社小原 光学玻璃、预成型体、及光学元件
CN102718567A (zh) * 2012-06-12 2012-10-10 卡罗比亚釉料（昆山）有限公司 一种不含铅的粉红制陶用的熔块

Also Published As

Publication number Publication date
CN102596835A (zh) 2012-07-18
JP2011093731A (ja) 2011-05-12
KR20120098748A (ko) 2012-09-05

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
WO2011052687A1 (fr) Verre optique, préforme, et élément optique
WO2011016566A1 (fr) Verre optique
JP6727692B2 (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
JP2022167990A (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
JP2011230991A (ja) 光学ガラス、プリフォーム、及び光学素子
JP6095260B2 (ja) 光学ガラス、プリフォーム及び光学素子
JP6860268B2 (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
JP5829379B2 (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
WO2012133421A1 (fr) Verre optique, préforme, et élément optique
JP2014080317A (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
JP2016088759A (ja) 光学ガラス、プリフォーム及び光学素子
JP2012206892A (ja) 光学ガラス、プリフォーム及び光学素子
JP2011144065A (ja) 光学ガラス、プリフォーム、及び光学素子
JP6629179B2 (ja) 光学ガラス、プリフォーム及び光学素子

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201080048550.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10826819

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20127013436

Country of ref document: KR

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 10826819

Country of ref document: EP

Kind code of ref document: A1