CN117658451A - Optical glass, glass preform, optical element, and optical instrument - Google Patents
Optical glass, glass preform, optical element, and optical instrument Download PDFInfo
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- CN117658451A CN117658451A CN202211031632.5A CN202211031632A CN117658451A CN 117658451 A CN117658451 A CN 117658451A CN 202211031632 A CN202211031632 A CN 202211031632A CN 117658451 A CN117658451 A CN 117658451A
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- 239000005304 optical glass Substances 0.000 title claims abstract description 105
- 230000003287 optical effect Effects 0.000 title claims abstract description 51
- 239000011521 glass Substances 0.000 title claims description 109
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 84
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims abstract description 36
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 23
- 238000005299 abrasion Methods 0.000 claims description 17
- 239000008395 clarifying agent Substances 0.000 claims description 17
- 229910005793 GeO 2 Inorganic materials 0.000 claims description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 10
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 9
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000007496 glass forming Methods 0.000 description 3
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- 238000003384 imaging method Methods 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
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Abstract
The invention provides optical glass, which comprises the following components in percentage by weight: siO (SiO) 2 ：1～15％；B 2 O 3 ：2～18％；La 2 O 3 ：35～65％；Y 2 O 3 ：5～25％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 : 5-20% of the refractive index n of the optical glass d Is 1.96 or more. Through reasonable component design, the optical glass obtained by the invention has the expected refractive index and Abbe number, and simultaneously has lower density, thereby meeting the light-weight use of optical instruments.
Description
Technical Field
The present invention relates to an optical glass, and more particularly, to an optical glass having a refractive index of 1.96 or more and an abbe number of 34 or less, and a glass preform, an optical element, and an optical instrument each made of the same.
Background
In recent years, digitization of optical instruments and high definition of images and videos have been advanced at a high speed. In particular, the high definition of images and videos is very prominent in optical devices such as digital cameras, video cameras, and projectors. Meanwhile, in the optical system included in these optical instruments, the number of optical elements such as lenses and prisms is reduced to achieve weight reduction and downsizing.
Under the same curvature radius, the imaging field of view obtained by the glass with higher refractive index is larger, which is beneficial to reducing the number of optical elements in the optical instrument, and along with the development trend of miniaturization of the optical instrument, the trend of the glass with high refractive index is more and more obvious. In order to achieve the purpose of light weight of an optical instrument, it is also an important approach to reduce the density of optical glass in addition to the number of optical elements in an optical system. CN101734855a discloses a high refractive index optical glass with refractive index greater than 1.95 and less than or equal to 2.20 and dispersion coefficient of 15-25, which has higher density and is not beneficial to further realizing the light weight of optical instruments.
Disclosure of Invention
The invention aims to provide optical glass with a refractive index of more than 1.96, an Abbe number of less than 34 and low density.
The technical scheme adopted for solving the technical problems is as follows:
the optical glass comprises the following components in percentage by weight: siO (SiO) 2 ：1～15％；B 2 O 3 ：2～18％；La 2 O 3 ：35～65％；Y 2 O 3 ：5～25％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 : 5-20% of the refractive index n of the optical glass d Is 1.96 or more.
Further, the optical glass comprises the following components in percentage by weight: gd (Gd) 2 O 3 : 0-10%; and/or Ta 2 O 5 : 0-5%; and/or RO: 0-10%; and/or Rn 2 O: 0-8%; and/or WO 3 : 0-5%; and/or ZnO: 0-10%; and/or Al 2 O 3 : 0-8%; and/or Yb 2 O 3 : 0-10%; and/or GeO 2 : 0-5%; and/or clarifying agent: 0 to 2 percent of RO is one or more of MgO, caO, srO, baO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and a clarifying agent of Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
An optical glass, the components of which are represented by weight percentage and are composed of SiO 2 ：1～15％；B 2 O 3 ：2～18％；La 2 O 3 ：35～65％；Y 2 O 3 ：5～25％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 ：5～20％；Gd 2 O 3 ：0～10％；Ta 2 O 5 ：0～5％；RO：0～10％；Rn 2 O：0～8％；WO 3 ：0～5％；ZnO：0～10％；Al 2 O 3 ：0～8％；Yb 2 O 3 ：0～10％；GeO 2 : 0-5%; clarifying agent: 0 to 2 percent of the composition, wherein the RO is one or more of MgO, caO, srO, baO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and a clarifying agent of Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the above, the refractive index n of the optical glass d Is 1.96 or more.
Further, the optical glass comprises the following components in percentage by weight: la (La) 2 O 3 +Y 2 O 3 +Gd 2 O 3 45 to 75%, preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 50 to 75%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 55 to 70 percent.
Further, the optical glass comprises the following components in percentage by weight: siO (SiO) 2 +B 2 O 3 5 to 30%, preferably SiO 2 +B 2 O 3 From 8 to 25%, more preferably SiO 2 +B 2 O 3 10 to 20 percent.
Further, the optical glass comprises the following components in percentage by weight: (La) 2 O 3 +TiO 2 )/Nb 2 O 5 Is 3.0 to 30.0, preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 Is 4.0 to 25.0, more preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 Is 5.0 to 20.0, more preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 5.5 to 15.0.
Further, the optical glass comprises the following components in percentage by weight: nb (Nb) 2 O 5 /Y 2 O 3 Is 0.1 to 2.0, preferably Nb 2 O 5 /Y 2 O 3 From 0.2 to 1.5, more preferably Nb 2 O 5 /Y 2 O 3 From 0.3 to 1.3, nb being more preferred 2 O 5 /Y 2 O 3 0.3 to 1.0.
Further, the optical glass comprises the following components in percentage by weight: y is Y 2 O 3 /TiO 2 From 0.3 to 3.0, preferably Y 2 O 3 /TiO 2 From 0.4 to 2.0, more preferably Y 2 O 3 /TiO 2 From 0.5 to 1.5, more preferably Y 2 O 3 /TiO 2 0.7 to 1.3.
Further, the optical glass comprises the following components in percentage by weight: (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.1 to 3.0, preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.2 to 2.5, more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.3 to 2.0, and more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.4 to 1.5.
Further, the optical glass comprises the following components in percentage by weight: (RO+ZnO)/Y 2 O 3 Is 1.0 or less, preferably (RO+ZnO)/Y 2 O 3 Is 0.8 or less, more preferably (RO+ZnO)/Y 2 O 3 Is 0.5 or less, more preferably (RO+ZnO)/Y 2 O 3 Is less than 0.2, and the RO is one or more of MgO, caO, srO, baO.
Further, the optical glass comprises the following components in percentage by weight: (RO+Gd) 2 O 3 )/Y 2 O 3 Is 1.0 or less, preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.8 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.6 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is less than 0.3, and the RO is one or more of MgO, caO, srO, baO.
Further, the optical glass comprises the following components in percentage by weight: (WO 3 +TiO 2 )/Y 2 O 3 Is 0.3 to 3.0, preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.4 to 2.5, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.5 to 2.0, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 0.7 to 1.5.
Further, the optical glass comprises the following components in percentage by weight: (SiO) 2 +B 2 O 3 )/Y 2 O 3 Is 0.2 to 3.5, preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 Is 0.4 to 3.0, more preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 Is 0.5 to 2.5, more preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 0.7 to 1.8.
Further, the optical glass comprises the following components in percentage by weight: siO (SiO) 2 :2 to 10%, preferably SiO 2 : 4-9%; and/or B 2 O 3 :4 to 12%, preferably B 2 O 3 : 5-10%; and/or La 2 O 3 :40 to 60%, preferably La 2 O 3 : 42-55%; and/or Y 2 O 3 :6 to 20%, preferably Y 2 O 3 :8 to 18%, more preferably Y 2 O 3 : 8-15%; and/or ZrO 2 :3 to 12%, preferably ZrO 2 : 4-10%; and/or Nb 2 O 5 :3 to 12%, preferably Nb 2 O 5 : 5-10%; and/or Ta 2 O 5 :0 to 3%, preferably Ta 2 O 5 :0 to 1 percent; and/or Gd 2 O 3 :0 to 6%, preferably Gd 2 O 3 :0 to 4 percent; and/or TiO 2 :6 to 18%, preferably TiO 2 : 8-15; and/or RO: 0-5%, preferably RO:0 to 2 percent; and/or Rn 2 O:0 to 3%, preferably Rn 2 O:0 to 2 percent; and/or WO 3 :0 to 3%, preferably WO 3 :0 to 2 percent; and/or ZnO:0 to 5%, preferably ZnO:0 to 2 percent; and/or Al 2 O 3 :0 to 4%, preferably Al 2 O 3 :0 to 2 percent; and/or Yb 2 O 3 :0 to 5%, preferably Yb 2 O 3 :0 to 2 percent; and/or GeO 2 :0 to 3%, preferably GeO 2 :0 to 1 percent; and/or clarifying agent: 0-1%, preferably clarifying agent: 0 to 0.5 percent, the RO is one or more of MgO, caO, srO, baO and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and a clarifying agent of Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
Further, the optical glass comprises the following components in percentage by weight 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 90% or more, preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 92% or more, more preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 94% or more, and SiO is more preferable 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 96% or more.
Further, the optical glass contains no Ta in the components 2 O 5 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain WO 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or not containing Yb 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain RO; and/or does not contain Rn 2 O; and/or contain no ZnO; and/or does not contain Al 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain GeO 2 The RO is one or more of MgO, caO, srO, baO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O.
Further, the refractive index n of the optical glass d 1.97 or more, preferably 1.98 or more, more preferably 1.99 or more, and still more preferably 1.99 to 2.02; abbe number v d 23 to 34, preferably 25 to 33, more preferably 26 to 32, and even more preferably 27 to 31.
Further, the density ρ of the optical glass is 5.20g/cm 3 Hereinafter, it is preferably 5.10g/cm 3 Hereinafter, more preferably 5.00g/cm 3 The following are set forth; and/or coefficient of thermal expansion alpha -30/70℃ 85X 10 -7 Preferably 80X 10, and K is less than or equal to -7 Preferably 75X 10 or less per K -7 and/K or below; and/or stability against water action D W More than 2 types, preferably 1 type; and/or acid action resistance stability D A More than 2 types, preferably 1 type; and/or weather resistance CR is 2 or more, preferably 1; and/or knoop hardness H K Is 670 multiplied by 10 7 Pa or more, preferably 680×10 7 Pa or more, more preferably 690X 10 7 Pa or more; and/or Young's modulus E of 11500X 10 7 Pa～15500×10 7 Pa, preferably 12000×10 7 Pa～15000×10 7 Pa, more preferably 12500X 10 7 Pa～14500×10 7 Pa, more preferably 13000X 10 7 Pa～14000×10 7 Pa; and/or the degree of air bubbles is a class A or more, preferably A 0 Above the stage, more preferably A 00 A stage; and/or abrasion degree F A From 80 to 125, preferably from 85 to 115, more preferably from 90 to 105.
And a glass preform made of the optical glass.
The optical element is made of the optical glass or the glass prefabricated member.
An optical instrument comprising the optical glass and/or comprising the optical element.
The beneficial effects of the invention are as follows: through reasonable component design, the optical glass obtained by the invention has the expected refractive index and Abbe number, and simultaneously has lower density, thereby meeting the light-weight use of optical instruments.
Detailed Description
The embodiments of the optical glass of the present invention will be described in detail below, but the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the object of the present invention. In the repeated explanation, the optical glass of the present invention is sometimes referred to simply as glass in the following description, although the explanation is omitted appropriately, and the gist of the present invention is not limited thereto.
[ optical glass ]
The ranges of the respective components (ingredients) of the optical glass of the present invention are described below. In the present invention, unless otherwise specified, the content and the total content of each component are all expressed in weight percent (wt%), that is, the content and the total content of each component are expressed in weight percent with respect to the total amount of the glass substance converted into the composition of oxide. The term "composition converted into oxide" as used herein means that the total amount of oxide used as a raw material of the optical glass composition of the present invention is 100% when the oxide, the composite salt, the hydroxide, and the like are melted and decomposed and converted into oxide.
Unless otherwise indicated in a particular context, the numerical ranges set forth herein include upper and lower limits, and "above" and "below" include the endpoints, and all integers and fractions within the range, and are not limited to the specific values set forth in the defined range. The term "and/or" as used herein is inclusive, e.g. "a and/or B", meaning either a alone, B alone, or both a and B.
< essential Components and optional Components >
B 2 O 3 Is a glass network forming component, has the functions of improving glass meltability and devitrification resistance and reducing glass transition temperature and density, and is prepared by the method of the invention, the glass network forming component contains more than 2 percent of B 2 O 3 To obtain the above effect, it preferably contains 4% or more of B 2 O 3 More preferably, the content of B is 5% or more 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the However, if the content exceeds 18%, the stability of the glass is lowered and the refractive index is lowered, and it is difficult to achieve the high refractive index of the present invention. Thus, in the present invention B 2 O 3 The upper limit of the content of (2) is 18%, preferably 12%, more preferably 10%.
SiO 2 The glass is also a network forming component, can adjust the thermal expansion coefficient of the glass, improves the devitrification resistance and chemical stability of the glass, and has the function of improving the thermal stability and high-temperature viscosity of the glass; if the content exceeds 15%, the melting property of the glass tends to deteriorate and the transition temperature increases. Thus, siO in the present invention 2 The content of (2) is 1 to 15%, preferably 2 to 10%, more preferably 4 to 9%.
In some embodiments, by combining SiO 2 And B 2 O 3 Is the total content of SiO 2 +B 2 O 3 The glass forming stability of the glass can be maintained, and the abrasion degree and weather resistance of the glass can be optimized to prevent the devitrification resistance of the glass from being reduced while the glass forming stability is controlled within the range of 5-30%. Therefore, siO is preferred 2 +B 2 O 3 5 to 30%, more preferably SiO 2 +B 2 O 3 From 8 to 25%, further preferably SiO 2 +B 2 O 3 10 to 20 percent.
La 2 O 3 Is an effective component for improving the refractive index of glass, has obvious effect on improving the chemical stability and the devitrification resistance of the glass, and is difficult to reach the required optical constant if the content is less than 35 percent; if the content is more than 65%, the devitrification tendency of the glass increases, and the thermal stability becomes poor. Therefore La 2 O 3 The content of (2) is limited to 35 to 65%, preferably 40 to 60%, more preferably 42 to 55%.
Y 2 O 3 The glass has improved refractive index and devitrification resistance, and the Young's modulus is adjusted by containing more than 5% of Y 2 O 3 To obtain the above-mentioned effects; if the content exceeds 25%, the chemical stability and resistance of the glassThe weather property becomes poor. Thus, Y in the present invention 2 O 3 The content is 5 to 25%, preferably 6 to 20%, more preferably 8 to 18%, and even more preferably 8 to 15%.
In some embodiments, siO 2 And B 2 O 3 Is the total content of SiO 2 +B 2 O 3 And Y is equal to 2 O 3 Ratio between the contents of (SiO) 2 +B 2 O 3 )/Y 2 O 3 The control of the glass temperature within the range of 0.2-3.5 is beneficial to improving the bubble degree of the glass and preventing the increase of the thermal expansion coefficient of the glass. Therefore, it is preferable that (SiO 2 +B 2 O 3 )/Y 2 O 3 Is 0.2 to 3.5, more preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 0.4 to 3.0. Further, control (SiO 2 +B 2 O 3 )/Y 2 O 3 In the range of 0.5 to 2.5, the hardness and weather resistance of the glass can be further improved. Therefore, it is more preferable that (SiO 2 +B 2 O 3 )/Y 2 O 3 Is 0.5 to 2.5, more preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 0.7 to 1.8.
Gd 2 O 3 The refractive index and chemical stability of the glass can be improved, but if the content is more than 10%, the devitrification resistance and abrasion resistance of the glass become poor. Thus Gd 2 O 3 The content of (2) is 0 to 10%, preferably 0 to 6%, more preferably 0 to 4%.
In some embodiments, by combining La 2 O 3 、Y 2 O 3 And Gd 2 O 3 Sum of (1) La 2 O 3 +Y 2 O 3 +Gd 2 O 3 The glass is controlled in the range of 45 to 75%, the desired refractive index and Abbe number are more easily obtained, and the devitrification resistance and weather resistance of the glass are optimized. Therefore, la is preferred 2 O 3 +Y 2 O 3 +Gd 2 O 3 45 to 75%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 50 to 75%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 55 to 70 percent.
Yb 2 O 3 Also, a component imparting high refractive and low dispersion properties to the glass, and if the content exceeds 8%, the crystallization resistance of the glass is lowered. Thus Yb 2 O 3 The content of (C) is 0 to 10%, preferably 0 to 5%, more preferably 0 to 2%, and even more preferably no Yb is contained 2 O 3 。
ZrO 2 The viscosity, hardness, refractive index and chemical stability of the optical glass can be improved, and the thermal expansion coefficient of the glass can be reduced; when ZrO (ZrO) 2 When the content of (b) is too high, devitrification resistance of the glass decreases, melting difficulty increases, melting temperature increases, and inclusion and light transmittance decrease occur in the glass. Thus, zrO in the present invention 2 The content of (2) to (15%), preferably 3% to (12%), more preferably 4% to (10%).
TiO 2 Is a high-refraction high-dispersion component, can obviously improve the refractive index and dispersion of the glass in the glass, and the inventor researches and discovers that a proper amount of the high-refraction high-dispersion component contains TiO 2 The glass stability can be increased; but if too much TiO is contained 2 The transmittance of the glass may be significantly reduced and the chemical stability of the glass may also tend to deteriorate. Thus, in the present invention, tiO 2 The content of (2) is 5 to 20%, preferably 6 to 18%, more preferably 8 to 15%.
In some embodiments, by combining Y 2 O 3 Content of (2) and TiO 2 Ratio Y between the contents of (2) 2 O 3 /TiO 2 The weather resistance of the glass can be improved and the abrasion degree can be optimized by controlling the glass within the range of 0.3-3.0. Therefore, Y is preferred 2 O 3 /TiO 2 From 0.3 to 3.0, more preferably Y 2 O 3 /TiO 2 0.4 to 2.0. Further, control Y 2 O 3 /TiO 2 In the range of 0.5-1.5, the chemical stability and the bubble degree of the glass can be further improved. Therefore, Y is further preferable 2 O 3 /TiO 2 From 0.5 to 1.5, more preferably Y 2 O 3 /TiO 2 0.7 to 1.3.
Nb 2 O 5 Is a high-refraction high-dispersion component, can improve the refractive index and devitrification resistance of the glass and reduce the thermal expansion coefficient of the glass, and contains more than 1 percent of Nb 2 O 5 To obtain the above effect, nb is preferable 2 O 5 The lower limit of the content of (2) is 3%, and more preferably the lower limit is 5%. If Nb is 2 O 5 The content of Nb exceeds 15%, the heat stability and weather resistance of the glass are lowered, and the light transmittance is lowered, so Nb in the present invention 2 O 5 The upper limit of the content of (2) is 15%, preferably 12%, more preferably 10%.
In some embodiments, by combining La 2 O 3 And TiO 2 Sum of (1) La 2 O 3 +TiO 2 With Nb 2 O 5 Ratio between the contents of (La) 2 O 3 +TiO 2 )/Nb 2 O 5 The chemical stability of the glass can be improved and the abrasion degree of the glass can be optimized by controlling the glass within the range of 3.0-30.0. Therefore, (La 2 O 3 +TiO 2 )/Nb 2 O 5 Is 3.0 to 30.0, more preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 4.0 to 25.0. Further, control (La 2 O 3 +TiO 2 )/Nb 2 O 5 In the range of 5.0-20.0, the thermal expansion coefficient of the glass can be further reduced, and the hardness of the glass can be improved. Therefore, (La 2 O 3 +TiO 2 )/Nb 2 O 5 Is 5.0 to 20.0, more preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 5.5 to 15.0.
In some embodiments, nb is 2 O 5 Content of (C) and Y 2 O 3 Ratio Nb between the contents of (C) 2 O 5 /Y 2 O 3 The Young's modulus of the glass can be improved and the reduction of the hardness of the glass can be prevented by controlling the Young's modulus to be in the range of 0.1-2.0. Therefore, nb is preferable 2 O 5 /Y 2 O 3 Is 0.1 to 2.0, more preferably Nb 2 O 5 /Y 2 O 3 0.2 to 1.5. Feeding inOne step, control Nb 2 O 5 /Y 2 O 3 In the range of 0.3 to 1.3, the bubble degree and abrasion degree of the glass can be further optimized. Therefore, nb is more preferable 2 O 5 /Y 2 O 3 From 0.3 to 1.3, nb being more preferred 2 O 5 /Y 2 O 3 0.3 to 1.0.
Alkaline earth oxide RO (RO is one or more of MgO, caO, srO, baO) can adjust the optical constants of the glass to optimize the chemical stability of the glass, but when its content is high, the devitrification resistance of the glass decreases. Therefore, the RO content is limited to 0 to 10%, preferably 0 to 5%, more preferably 0 to 2%. In some embodiments, it is further preferred that RO is not present.
In some embodiments, RO and Gd 2 O 3 Is the sum of RO+Gd 2 O 3 And Y is equal to 2 O 3 Ratio between the contents of (RO+Gd) 2 O 3 )/Y 2 O 3 The glass density is controlled below 1.0, the chemical stability of the glass is improved, and the Young modulus and the bubble degree of the glass are optimized. Therefore, (RO+Gd is preferable 2 O 3 )/Y 2 O 3 Is 1.0 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.8 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.6 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.3 or less.
Alkali metal oxide Rn 2 O(Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O) can lower the glass transition temperature, adjust the optical constant and high-temperature viscosity of the glass, improve the meltability of the glass, but when the content thereof is high, the devitrification resistance and chemical stability of the glass are reduced. Thus, rn in the present invention 2 The content of O is 0 to 8%, preferably 0 to 3%, more preferably 0 to 2%. In some embodiments, it is further preferred that Rn is absent 2 O。
WO 3 Can improve the refractive index and mechanical strength of the glass, if WO 3 The content of (2) exceeds 5%, the thermal stability of the glass decreases, and the devitrification resistance decreases. Thus, WO 3 The upper limit of the content of (2) is 5%, preferably 3%, more preferably 2%. In some embodiments, it is further preferred that WO is not included 3 。
In some embodiments, nb is 2 O 5 、WO 3 、Gd 2 O 3 Is the sum of Nb 2 O 5 +WO 3 +Gd 2 O 3 With TiO 2 Ratio between contents (Nb 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 The light transmittance of the glass can be improved and the density can be prevented from being increased by controlling the glass within the range of 0.1 to 3.0. Therefore, it is preferable that (Nb 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.1 to 3.0, more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.2 to 2.5. Further, control (Nb 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 In the range of 0.3-2.0, the thermal expansion coefficient of the glass can be further reduced, and the Young's modulus can be improved. Therefore, it is more preferable that (Nb 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.3 to 2.0, and more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.4 to 1.5.
In some embodiments, WO is used 3 And TiO 2 Is the sum of WO 3 +TiO 2 And Y is equal to 2 O 3 The ratio between the contents of (WO) 3 +TiO 2 )/Y 2 O 3 The control of the glass within the range of 0.3-3.0 is beneficial to improving the chemical stability of the glass and optimizing the abrasion degree and Young's modulus. Therefore, it is preferable (WO 3 +TiO 2 )/Y 2 O 3 Is 0.3 to 3.0, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.4 to 2.5, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.5 to 2.0, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 0.7 to 1.5.
ZnO can adjust the refractive index and dispersion of the glass, and reduce the high-temperature viscosity and the transition temperature of the glass. If the ZnO content is too high, the glass forming difficulty is increased, and the crystallization resistance is deteriorated. Accordingly, the content of ZnO is 0 to 10%, preferably 0 to 5%, more preferably 0 to 2%. In some embodiments, it is further preferred that ZnO is absent.
In some embodiments, the combined RO and ZnO contents RO+ZnO and Y 2 O 3 Ratio (RO+ZnO)/Y between the contents of (C) 2 O 3 The glass is controlled below 1.0, so that the weather resistance of the glass can be improved, the abrasion degree can be optimized, and the bubble degree and the thermal expansion coefficient of the glass can be prevented from deteriorating. Therefore, (RO+ZnO)/Y is preferable 2 O 3 Is 1.0 or less, more preferably (RO+ZnO)/Y 2 O 3 Is 0.8 or less, more preferably (RO+ZnO)/Y 2 O 3 Is 0.5 or less, more preferably (RO+ZnO)/Y 2 O 3 Is 0.2 or less.
Ta 2 O 5 The glass has the functions of improving the refractive index and improving the devitrification resistance of the glass, but if the content is too high, the thermal stability of the glass is reduced, and the density is increased; on the other hand, ta compared with other components 2 O 5 Is very expensive, and the amount of the catalyst to be used should be reduced as much as possible from the practical and cost viewpoints. Thus, ta in the present invention 2 O 5 The content of (2) is limited to 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%. In some embodiments, it is further preferred that Ta is not present 2 O 5 。
Al 2 O 3 The chemical stability of the glass can be improved, but when the content exceeds 8%, the melting property and light transmittance of the glass become poor. Thus, al in the present invention 2 O 3 The content of (2) is 0 to 8%, preferably 0 to 4%, more preferably 0 to 2%. In some embodiments, it is further preferred that Al is absent 2 O 3 。
GeO 2 Has the effect of improving the refractive index and the devitrification resistance, but if the content is too high, the chemical stability of the glass is reduced; on the other hand, compared with other components,GeO 2 is very expensive, and the amount of the catalyst to be used should be reduced as much as possible from the practical and cost viewpoints. Thus, geO in the present invention 2 The content of (2) is limited to 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%, and even more preferably no GeO is contained 2 。
In the invention, 0 to 2 percent of Sb is contained 2 O 3 、SnO、SnO 2 、CeO 2 The one or more components in the glass are used as a clarifying agent, so that the clarifying effect of the glass can be improved, the bubble degree of the glass is improved, the content of the clarifying agent is preferably 0-1%, and the content of the clarifying agent is more preferably 0-0.5%. Since the optical glass of the present invention has a reasonable design of the types and contents of components and is excellent in bubble degree, it is further preferable that a clarifier is not contained in some embodiments. When Sb is 2 O 3 If the content exceeds 2%, the glass tends to be degraded in fining property, and the strong oxidation promotes corrosion of platinum or platinum alloy vessels for melting the glass and deterioration of molding dies, so that Sb is preferable in the present invention 2 O 3 The content of (C) is 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably no Sb is contained 2 O 3 . SnO and SnO 2 When the content exceeds 2%, the glass tends to be colored, or when the glass is heated, softened, and subjected to press molding or the like to be reformed, sn becomes a starting point of nucleation and devitrification tends to occur. Thus SnO of the present invention 2 The content of (2) is preferably 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably no SnO is contained 2 The method comprises the steps of carrying out a first treatment on the surface of the The content of SnO is preferably 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably no SnO is contained. CeO (CeO) 2 Action and content ratio of (2) and SnO 2 The content thereof is preferably 0 to 2%, more preferably 0 to 1%, even more preferably 0 to 0.5%, and still more preferably no CeO is contained 2 。
In some embodiments, to achieve lower coefficients of thermal expansion and densities, higher light transmittance and bubble level, and suitable abrasion and poplar levels for the optical glasses of the present inventionModulus of elasticity, preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 90% or more, more preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 92% or more, further preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 94% or more, and SiO is more preferable 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 96% or more.
< component not to be contained >
In the glass of the present invention, V, cr, mn, fe, co, ni, cu, ag and oxides of transition metals such as Mo are colored even when they are contained in small amounts, either alone or in combination, and absorb at a specific wavelength in the visible light range, so that the property of the present invention of improving the visible light transmittance effect is impaired, and therefore, in particular, an optical glass having a wavelength transmittance in the visible light range is preferably practically not contained.
Th, cd, tl, os, be and Se oxides have a tendency to be used in a controlled manner as harmful chemical substances in recent years, and are required to provide environmental protection not only in the glass manufacturing process but also in the processing steps and disposal after production. Therefore, in the case where the influence on the environment is emphasized, it is preferable that they are not substantially contained except for unavoidable mixing. As a result, the optical glass becomes practically free from environmental pollutants. Therefore, the optical glass of the present invention can be manufactured, processed, and discarded without taking special measures against the environment.
In order to achieve environmental friendliness, the optical glass of the present invention preferably does not containAs 2 O 3 And PbO.
The term "not containing" or "0%" as used herein means that the compound, molecule, element or the like is not intentionally added as a raw material to the optical glass of the present invention; however, it is also within the scope of the present invention that certain impurities or components may be present as raw materials and/or equipment for producing optical glass that are not intentionally added, and that may be present in small or trace amounts in the final optical glass.
The performance of the optical glass of the present invention will be described below.
< refractive index and Abbe number >
Refractive index (n) d ) With Abbe number (v) d ) Tested according to the method specified in GB/T7962.1-2010.
In some embodiments, the refractive index (n d ) The lower limit of (2) is 1.96, preferably 1.97, more preferably 1.98, and even more preferably 1.99.
In some embodiments, the refractive index (n d ) The upper limit of (2) is 2.10, preferably 2.05, more preferably 2.02.
In some embodiments, the Abbe number (. Nu.) of the optical glass of the present invention d ) The lower limit of (2) is 23, preferably 25, more preferably 26, and even more preferably 27.
In some embodiments, the Abbe number (. Nu.) of the optical glass of the present invention d ) The upper limit of (2) is 34, preferably 33, more preferably 32, and even more preferably 31.
< Density >
The density (. Rho.) of the optical glass was measured according to the method prescribed in GB/T7962.20-2010.
In some embodiments, the optical glass of the present invention has a density (ρ) of 5.20g/cm 3 Hereinafter, it is preferably 5.10g/cm 3 Hereinafter, more preferably 5.00g/cm 3 The following is given.
< coefficient of thermal expansion >
Coefficient of thermal expansion (. Alpha.) of optical glass -30/70℃ ) Data at-30 to 70℃were tested according to the procedure prescribed in GB/T7962.16-2010.
In some embodiments, the optical glass of the present invention has a coefficient of thermal expansion (α -30/70℃ ) 85X 10 -7 Preferably 80X 10, and K is less than or equal to -7 Preferably 75X 10 or less per K -7 and/K or below.
< stability against Water action >
Stability against Water action of optical glass (D W ) (powder method) the test was carried out according to the method prescribed in GB/T17129.
In some embodiments, the water resistance stability (D W ) More than 2 kinds, preferably 1 kind.
< stability against acid action >
Acid action resistance stability of optical glass (D A ) (powder method) the test was carried out according to the method prescribed in GB/T17129.
In some embodiments, the acid action resistance stability (D A ) More than 2 kinds, preferably 1 kind.
< weather resistance >
The weather resistance (CR) test method of the optical glass is as follows: the sample is placed in a test box in a saturated steam environment with the relative humidity of 90 percent, and the sample is alternately circulated at the temperature of 40-50 ℃ for 15 cycles every 1 hour. Weather resistance categories were classified according to the amount of turbidity change before and after sample placement, and weather resistance classification conditions are shown in table 1:
table 1.
In some embodiments, the optical glass of the present invention has a weatherability (CR) of 2 or more, preferably 1.
< Knoop hardness >
Knoop hardness of optical glass (H K ) The test is carried out according to the test method specified in GB/T7962.18-2010.
In some embodimentsWherein the Knoop hardness (H) K ) Is 670 multiplied by 10 7 Pa or more, preferably 680×10 7 Pa or more, more preferably 690X 10 7 Pa or more.
< Young's modulus >
Young's modulus (E) is obtained by measuring longitudinal wave velocity and transverse wave velocity by ultrasonic wave and calculating according to the following formula.
G＝V S 2 ρ
Wherein: e is Young's modulus, pa;
g is the shear modulus, pa;
V T is transverse wave speed, m/s;
V S is longitudinal wave speed, m/s;
ρ is the density of the glass, g/cm 3 。
In some embodiments, the Young's modulus (E) of the optical glass of the present invention has a lower limit of 11500X 10 7 Pa, a preferred lower limit is 12000×10 7 Pa, and a lower limit of 12500X 10 is more preferable 7 Pa, a lower limit of 13000×10 is further preferable 7 Pa。
In some embodiments, the Young's modulus (E) of the optical glass of the present invention has an upper limit of 15500X 10 7 Pa, the preferable upper limit is 15000×10 7 Pa, and more preferably an upper limit of 14500X 10 7 Pa, a further preferable upper limit is 14000×10 7 Pa。
< abrasion degree >
Abrasion degree (F) of optical glass A ) The abrasion loss of the sample and the abrasion loss (volume) of the standard sample (H-K9 glass) are multiplied by 100 under the identical conditions, and the values are expressed as follows:
F A ＝V/V 0 ×100＝(W/ρ)/(W 0 /ρ 0 )×100
wherein: v-the volume abrasion of the sample to be measured;
V 0 -standard sample volume attrition;
w is the mass abrasion quantity of the sample to be measured;
W 0 -standard sample mass abrasion;
ρ -the measured sample density;
ρ 0 standard sample density.
In some embodiments, the abrasiveness (F A ) The lower limit of (2) is 80, preferably 85, more preferably 90.
In some embodiments, the abrasiveness (F A ) The upper limit of (2) is 125, preferably 115, more preferably 105.
< bubble degree >
The bubble degree of the optical glass was measured according to the method prescribed in GB/T7962.8-2010.
In some embodiments, the optical glass of the present invention has a bubble degree of class A or more, preferably class A 0 Above the stage, more preferably A 00 A stage.
[ method for producing optical glass ]
The manufacturing method of the optical glass comprises the following steps: the glass of the invention is produced by adopting conventional raw materials and processes, including but not limited to oxide, hydroxide, compound salt (such as carbonate, nitrate, sulfate and the like), boric acid and the like as raw materials, after being proportioned according to a conventional method, the proportioned furnace burden is put into a smelting furnace (such as a platinum or platinum alloy crucible) with the temperature of 1200-1450 ℃ to be smelted, and after clarification and homogenization, homogeneous molten glass without bubbles and undissolved substances is obtained, and the molten glass is cast in a mould and annealed. Those skilled in the art can appropriately select the raw materials, the process methods, and the process parameters according to actual needs.
[ glass preform and optical element ]
The optical glass thus produced may be used to produce a glass preform by direct drop molding, grinding, or compression molding such as hot press molding. That is, the glass preform may be produced by directly precision drop molding a molten optical glass into a glass precision preform, or by mechanical processing such as grinding and polishing, or by producing a preform for press molding from an optical glass, and then performing hot press molding and polishing on the preform. The means for producing the glass preform is not limited to the above-described means.
As described above, the optical glass of the present invention is useful for various optical elements and optical designs, and among them, it is particularly preferable to form a preform from the optical glass of the present invention, and use the preform for performing hot press molding, precision press molding, and the like to produce optical elements such as lenses and prisms.
The glass preform and the optical element of the present invention are each formed of the optical glass of the present invention described above. The glass preform of the present invention has excellent characteristics possessed by an optical glass; the optical element of the present invention has excellent characteristics of optical glass, and can provide various optical elements such as lenses and prisms having high optical value.
Examples of the lens include various lenses such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens, each of which has a spherical or aspherical lens surface.
[ optical instrument ]
The optical element formed by the optical glass can be used for manufacturing optical instruments such as photographic equipment, image pickup equipment, projection equipment, display equipment, vehicle-mounted equipment, monitoring equipment and the like.
Examples
< example of optical glass >
In order to further clearly illustrate and describe the technical solutions of the present invention, the following non-limiting examples are provided.
In this example, optical glasses having compositions shown in tables 2 to 4 were obtained by using the above-described optical glass manufacturing method. The characteristics of each glass were measured by the test method of the present invention, and the measurement results are shown in tables 2 to 4.
Table 2.
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Table 3.
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Table 4.
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< example of glass preform >
The glasses obtained in examples 1 to 24 were subjected to polishing, re-hot press molding, and press molding such as precision press molding to prepare various kinds of lenses such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses, and preforms such as prisms.
< example of optical element >
The glass preforms obtained in the above examples were annealed, and the refractive index was fine-tuned while reducing the internal stress of the glass so that the optical characteristics such as refractive index reached the desired values.
Next, each preform was ground and polished to produce various lenses and prisms such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens. The surface of the obtained optical element may be coated with an antireflection film.
< example of optical instrument >
The optical elements produced by the above-described optical element embodiments are useful, for example, in imaging devices, sensors, microscopes, medical technology, digital projection, communications, optical communication technology/information transmission, optics/illumination in the automotive field, lithography, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices including such circuits and chips, by optical design, by forming optical components or optical assemblies using one or more optical elements.
Claims (21)
1. The optical glass is characterized by comprising the following components in percentage by weight: siO (SiO) 2 ：1～15％；B 2 O 3 ：2～18％；La 2 O 3 ：35～65％；Y 2 O 3 ：5～25％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 : 5-20% of the refractive index n of the optical glass d Is 1.96 or more.
2. The optical glass according to claim 1, wherein the composition, expressed in weight percent, further comprises: gd (Gd) 2 O 3 : 0-10%; and/or Ta 2 O 5 : 0-5%; and/or RO: 0-10%; and/or Rn 2 O: 0-8%; and/or WO 3 : 0-5%; and/or ZnO: 0-10%; and/or Al 2 O 3 : 0-8%; and/or Yb 2 O 3 : 0-10%; and/or GeO 2 : 0-5%; and/or clarifying agent: 0 to 2 percent of RO is one or more of MgO, caO, srO, baO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and a clarifying agent of Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
3. An optical glass, characterized in that the components thereof are represented by weight percent and are composed of SiO 2 ：1～15％；B 2 O 3 ：2～18％；La 2 O 3 ：35～65％；Y 2 O 3 ：5～25％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 ：5～20％；Gd 2 O 3 ：0～10％；Ta 2 O 5 ：0～5％；RO：0～10％；Rn 2 O：0～8％；WO 3 ：0～5％；ZnO：0～10％；Al 2 O 3 ：0～8％；Yb 2 O 3 ：0～10％；GeO 2 : 0-5%; clarifying agent: 0 to 2 percent of the composition, wherein the RO is one or more of MgO, caO, srO, baO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and a clarifying agent of Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the above, the refractive index n of the optical glass d Is 1.96 or more.
4. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: la (La) 2 O 3 +Y 2 O 3 +Gd 2 O 3 45 to 75%, preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 50 to 75%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 55 to 70 percent.
5. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: siO (SiO) 2 +B 2 O 3 5 to 30%, preferably SiO 2 +B 2 O 3 From 8 to 25%, more preferably SiO 2 +B 2 O 3 10 to 20 percent.
6. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: (La) 2 O 3 +TiO 2 )/Nb 2 O 5 Is 3.0 to 30.0, preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 Is 4.0 to 25.0, more preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 Is 5.0 to 20.0, more preferably (La) 2 O 3 +TiO 2 )/Nb 2 O 5 5.5 to 15.0.
7. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: nb (Nb) 2 O 5 /Y 2 O 3 Is 0.1 to 2.0, preferably Nb 2 O 5 /Y 2 O 3 From 0.2 to 1.5, more preferably Nb 2 O 5 /Y 2 O 3 From 0.3 to 1.3, nb being more preferred 2 O 5 /Y 2 O 3 0.3 to 1.0.
8. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: y is Y 2 O 3 /TiO 2 From 0.3 to 3.0, preferably Y 2 O 3 /TiO 2 From 0.4 to 2.0, more preferably Y 2 O 3 /TiO 2 From 0.5 to 1.5, more preferably Y 2 O 3 /TiO 2 0.7 to 1.3.
9. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.1 to 3.0, preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.2 to 2.5, more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.3 to 2.0, and more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.4 to 1.5.
10. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: (RO+ZnO)/Y 2 O 3 Is 1.0 or less, preferably (RO+ZnO)/Y 2 O 3 Is 0.8 or less, more preferably (RO+ZnO)/Y 2 O 3 Is 0.5 or less, more preferably (RO+ZnO)/Y 2 O 3 Is less than 0.2, and the RO is one or more of MgO, caO, srO, baO.
11. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: (RO+Gd) 2 O 3 )/Y 2 O 3 Is 1.0 or less, preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.8 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is 0.6 or less, more preferably (RO+Gd) 2 O 3 )/Y 2 O 3 Is less than 0.3, and the RO is one or more of MgO, caO, srO, baO.
12. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: (WO 3 +TiO 2 )/Y 2 O 3 Is 0.3 to 3.0, preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.4 to 2.5, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.5 to 2.0, more preferably (WO) 3 +TiO 2 )/Y 2 O 3 0.7 to 1.5.
13. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: (SiO) 2 +B 2 O 3 )/Y 2 O 3 Is 0.2 to 3.5, preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 Is 0.4 to 3.0, more preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 Is 0.5 to 2.5, more preferably (SiO) 2 +B 2 O 3 )/Y 2 O 3 0.7 to 1.8.
14. An optical glass according to any one of claims 1 to 3, wherein the components thereof are expressed in weight percent, wherein: siO (SiO) 2 :2 to 10%, preferably SiO 2 : 4-9%; and/or B 2 O 3 :4 to 12%, preferably B 2 O 3 : 5-10%; and/or La 2 O 3 :40 to 60%, preferably La 2 O 3 : 42-55%; and/or Y 2 O 3 :6 to 20%, preferably Y 2 O 3 :8 to 18%, more preferably Y 2 O 3 : 8-15%; and/or ZrO 2 :3 to 12%, preferably ZrO 2 : 4-10%; and/or Nb 2 O 5 :3 to 12%, preferably Nb 2 O 5 : 5-10%; and/or Ta 2 O 5 :0 to 3%, preferably Ta 2 O 5 :0 to 1 percent; and/or Gd 2 O 3 :0 to 6%, preferably Gd 2 O 3 :0 to 4 percent; and/or TiO 2 :6 to 18%, preferably TiO 2 : 8-15; and/or RO: 0-5%, preferably RO:0 to 2 percent; and/or Rn 2 O:0 to 3%, preferably Rn 2 O:0 to 2 percent; and/or WO 3 :0 to 3%, preferably WO 3 :0 to 2 percent; and/or ZnO:0 to 5%, preferably ZnO:0 to 2 percent; and/or Al 2 O 3 :0 to 4%, preferably Al 2 O 3 :0 to 2 percent; and/or Yb 2 O 3 :0 to 5%, preferably Yb 2 O 3 :0 to 2 percent; and/or GeO 2 :0 to 3%, preferably GeO 2 :0 to 1 percent; and/or clarifying agent: 0-1%, preferably clarifying agent: 0 to 0.5 percent, the RO is one or more of MgO, caO, srO, baO and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and a clarifying agent of Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
15. An optical glass according to any one of claims 1 to 3, wherein the components are expressed in weight percent as SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 90% or more, preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 92% or more, more preferably SiO 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 94% or more, and SiO is more preferable 2 、B 2 O 3 、La 2 O 3 、Y 2 O 3 、ZrO 2 、Nb 2 O 5 、TiO 2 The total content of (2) is 96% or more.
16. An optical glass according to any one of claims 1 to 3, wherein the composition does not contain Ta 2 O 5 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain WO 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or not containing Yb 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain RO; and/or does not contain Rn 2 O; and/or contain no ZnO; and/or does not contain Al 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain GeO 2 The RO is one or more of MgO, caO, srO, baO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O.
17. An optical glass according to any one of claims 1 to 3, wherein the refractive index n of the optical glass d 1.97 or more, preferably 1.98 or more, more preferably 1.99 or more, and still more preferably 1.99 to 2.02; abbe number v d 23 to 34, preferably 25 to 33, more preferablyPreferably 26 to 32, and more preferably 27 to 31.
18. An optical glass according to any one of claims 1 to 3, wherein the optical glass has a density ρ of 5.20g/cm 3 Hereinafter, it is preferably 5.10g/cm 3 Hereinafter, more preferably 5.00g/cm 3 The following are set forth; and/or coefficient of thermal expansion alpha -30/70℃ 85X 10 -7 Preferably 80X 10, and K is less than or equal to -7 Preferably 75X 10 or less per K -7 and/K or below; and/or stability against water action D W More than 2 types, preferably 1 type; and/or acid action resistance stability D A More than 2 types, preferably 1 type; and/or weather resistance CR is 2 or more, preferably 1; and/or knoop hardness H K Is 670 multiplied by 10 7 Pa or more, preferably 680×10 7 Pa or more, more preferably 690X 10 7 Pa or more; and/or Young's modulus E of 11500X 10 7 Pa～15500×10 7 Pa, preferably 12000×10 7 Pa～15000×10 7 Pa, more preferably 12500X 10 7 Pa～14500×10 7 Pa, more preferably 13000X 10 7 Pa～14000×10 7 Pa; and/or the degree of air bubbles is a class A or more, preferably A 0 Above the stage, more preferably A 00 A stage; and/or abrasion degree F A From 80 to 125, preferably from 85 to 115, more preferably from 90 to 105.
19. A glass preform produced by using the optical glass according to any one of claims 1 to 18.
20. An optical element, characterized in that it is made of the optical glass according to any one of claims 1 to 18 or of the glass preform according to claim 19.
21. An optical instrument comprising the optical glass according to any one of claims 1 to 18 and/or the optical element according to claim 20.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211031632.5A CN117658451A (en) | 2022-08-26 | 2022-08-26 | Optical glass, glass preform, optical element, and optical instrument |
| JP2023134877A JP2024031898A (en) | 2022-08-26 | 2023-08-22 | Optical glass, glass preform, optical element and optical device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211031632.5A CN117658451A (en) | 2022-08-26 | 2022-08-26 | Optical glass, glass preform, optical element, and optical instrument |
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| CN117658451A true CN117658451A (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211031632.5A Pending CN117658451A (en) | 2022-08-26 | 2022-08-26 | Optical glass, glass preform, optical element, and optical instrument |
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| Country | Link |
|---|---|
| JP (1) | JP2024031898A (en) |
| CN (1) | CN117658451A (en) |
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| JP2024031898A (en) | 2024-03-07 |
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