CN115286237A - Optical glass and optical element - Google Patents
Optical glass and optical element Download PDFInfo
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- CN115286237A CN115286237A CN202211031100.1A CN202211031100A CN115286237A CN 115286237 A CN115286237 A CN 115286237A CN 202211031100 A CN202211031100 A CN 202211031100A CN 115286237 A CN115286237 A CN 115286237A
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- 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
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- 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
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/004—Refining agents
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- 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
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Abstract
The invention provides an optical glass, which comprises the following components in percentage by weight: siO 2 2 +B 2 O 3 ：5～30％；La 2 O 3 +Y 2 O 3 +Gd 2 O 3 ：45～75％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 :5 to 20 percent of Nb, wherein 2 O 5 /Y 2 O 3 Is 0.1 to 2.0. Through reasonable component design, the optical glass obtained by the invention has higher Young modulus and hardness while having the expected refractive index and Abbe number.
Description
Technical Field
The invention relates to optical glass, in particular to optical glass with a refractive index of more than 1.97 and an Abbe number of 25-34.
Background
In recent years, various optical devices such as digital cameras, video cameras, projectors, and projection televisions have been advancing toward digitization and high definition, and in order to achieve miniaturization and weight reduction of the optical devices, it is necessary to reduce the number of lenses and prisms used in an optical system. Under the same curvature radius, the higher the refractive index of the glass, the larger the obtained imaging field of view is, 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 demand trend of the high refractive index glass is more and more obvious. However, when an optical glass is processed into a small or thin optical element, if its young's modulus is small, it is easily deformed during use. With the development of technologies such as intelligent driving and internet of things, optical glass is widely applied to the fields of vehicle-mounted imaging, monitoring security and the like, and the optical glass is required to have higher hardness so as to resist abrasion and attack of sand and stones in the driving process of a vehicle and prolong the service life of the optical glass.
Disclosure of Invention
The invention aims to solve the technical problem of providing optical glass with higher Young modulus and hardness.
The technical scheme adopted by the invention for solving the technical problem is as follows:
(1) The optical glass comprises the following components in percentage by weight: siO 2 2 +B 2 O 3 ：5～30％；La 2 O 3 +Y 2 O 3 +Gd 2 O 3 ：45～75％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 :5 to 20 percent of Nb, wherein 2 O 5 /Y 2 O 3 Is 0.1 to 2.0.
(2) The optical glass according to (1), which comprises the following components in percentage by weight: ta 2 O 5 :0 to 5 percent; and/or RO:0 to 10 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 10 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 10 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0-2%, RO is one or more of MgO, caO, srO and BaO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(3) Optical glass containing ZrO 2 、Nb 2 O 5 、TiO 2 The components of the material are expressed by weight percentage and contain 5 to 30 percent of SiO 2 +B 2 O 3 And 45 to 75% of La 2 O 3 +Y 2 O 3 +Gd 2 O 3 Wherein Nb 2 O 5 /Y 2 O 3 0.1 to 2.0, a refractive index of the optical glass of 1.97 or more, an Abbe number of 25 to 34, and a Knoop hardness of H K Is 670X 10 7 Pa or more, and a Young's modulus E of 11500X 10 7 Pa～15500×10 7 Pa。
(4) The optical glass according to (3), which comprises the following components in percentage by weight: zrO (ZrO) 2 :2 to 15 percent; and/or Nb 2 O 5 :1 to 15 percent; and/or TiO 2 :5 to 20 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or RO:0 to 10 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 10 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 10 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0 to 2 percent of RO, rn and one or more of MgO, caO, srO and BaO 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(5) The optical glass according to any one of (1) to (4), which 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, and (La) is more preferable 2 O 3 +TiO 2 )/Nb 2 O 5 5.5 to 15.0; and/or Nb 2 O 5 /Y 2 O 3 0.2 to 1.5, preferably Nb 2 O 5 /Y 2 O 3 0.3 to 1.3, more preferably Nb 2 O 5 /Y 2 O 3 0.3 to 1.0; and/or Y 2 O 3 /TiO 2 0.3 to 3.0, preferably Y 2 O 3 /TiO 2 Is 0.4 to 2.0, more preferably Y 2 O 3 /TiO 2 Is 0.5 to 1.5, and Y is more preferably 2 O 3 /TiO 2 0.7 to 1.3; and/or (SiO) 2 +B 2 O 3 )/Y 2 O 3 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, and (SiO) is more preferable 2 +B 2 O 3 )/Y 2 O 3 Is 0.7 to 1.8.
(6) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 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, more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.4 to 1.5; and/or (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 0.2 or less; and/or (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, and more preferably (RO + Gd) 2 O 3 )/Y 2 O 3 Is 0.3 or less; and/or (WO) 3 +TiO 2 )/Y 2 O 3 From 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, and is more preferably (WO) 3 +TiO 2 )/Y 2 O 3 0.7 to 1.5, and the RO is one or more of MgO, caO, srO and BaO.
(7) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: siO 2 2 +B 2 O 3 :8 to 25%, preferably SiO 2 +B 2 O 3 :10 to 20 percent; and/or 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; and/or ZrO 2 :3 to 12%, preferably ZrO 2 :4 to 10 percent; and/or Nb 2 O 5 :3 to 12%, preferably Nb 2 O 5 :5 to 10 percent; and/or Ta 2 O 5 :0 to 3%, preferably Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :6 to 18%, preferably TiO 2 :8 to 15 percent; and/or RO:0 to 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 a clarifying agent: 0 to 1%, preferably a clarifying agent: 0 to 0.5 percent of the total weight of the catalyst, wherein the RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(8) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: siO 2 2 :1 to 15%, preferably SiO 2 :2 to 10%, more preferably SiO 2 :4 to 9 percent; and/or B 2 O 3 :2 to 18%, preferably B 2 O 3 :4 to 12%, more preferably B 2 O 3 :5 to 10 percent; and/or La 2 O 3 :35 to 65%, preferably La 2 O 3 :40 to 60%, more preferably La 2 O 3 :42 to 55 percent; and/or Y 2 O 3 :5 to 25%, preferably Y 2 O 3 :6 to 20%, more preferably Y 2 O 3 :8 to 18%, and Y is more preferably 2 O 3 :8 to 15 percent; and/or Gd 2 O 3 :0 to 10%, preferably Gd 2 O 3 :0 to 6%, moreGd is preferred 2 O 3 ：0～4％。
(9) The optical glass according to any one of (1) to (4), wherein the composition is SiO in terms of weight percent 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, and SiO is preferred 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 (A) is 92% 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 (A) 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 (A) is 96% or more.
(10) The optical glass according to any one of (1) to (4), wherein Ta is not contained in the composition 2 O 5 (ii) a And/or does not contain WO 3 (ii) a And/or does not contain Yb 2 O 3 (ii) a And/or does not contain RO; and/or does not contain Rn 2 O; and/or no ZnO; and/or does not contain Al 2 O 3 (ii) a And/or does not contain GeO 2 The RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O.
(11) The optical glass according to any one of (1) to (4), wherein the refractive index n of the optical glass d 1.97 to 2.10, preferably 1.98 to 2.05, more preferably 1.99 to 2.02; abbe number v d Is 25 to 34, preferably 26 to 33, more preferably 27 to 32, and still more preferably 28 to 31.
(12) The optical glass according to any one of (1) to (4), wherein the density ρ of the optical glass is 5.20g/cm 3 Below, preferably 5.10g/cm 3 Hereinafter, more preferably 5.00g/cm 3 The following; and/orCoefficient of thermal expansion alpha -30/70℃ Is 85X 10 -7 Preferably 80X 10 or less,/K -7 A value of less than or equal to K, more preferably 75X 10 -7 below/K; and/or stability against water action D W Is 2 or more, preferably 1; and/or stability against acid action D A Is 2 or more, preferably 1; and/or the weather resistance CR is of class 2 or more, preferably of class 1; and/or Knoop hardness H K Is 670 multiplied by 10 7 Pa or more, preferably 680X 10 7 Pa or more, more preferably 690X 10 7 Pa or above; and/or a Young's modulus E of 11500X 10 7 Pa～15500×10 7 Pa, preferably 12000X 10 7 Pa～15000×10 7 Pa, more preferably 12500X 10 7 Pa～14500×10 7 Pa, further preferably 13000X 10 7 Pa～14000×10 7 Pa; and/or the degree of bubbling is class A or higher, preferably class A 0 More preferably A or more 00 Stage (2); and/or degree of wear F A Is 80 to 125, preferably 85 to 115, and more preferably 90 to 105.
(13) A glass preform made of the optical glass according to any one of (1) to (12).
(14) An optical element produced from the optical glass according to any one of (1) to (12), or the glass preform according to (13).
(15) An optical device comprising the optical glass according to any one of (1) to (12) and/or the optical element according to (14).
The invention has the beneficial effects that: through reasonable component design, the optical glass obtained by the invention has higher Young modulus and hardness while having the expected refractive index and Abbe number.
Detailed Description
The optical glass of the present invention is obtained by the following steps, which are not intended to limit the scope of the present invention. Although the description of the overlapping portions may be omitted as appropriate, the gist of the present invention is not limited thereto, and the optical glass of the present invention may be simply referred to as glass in the following description.
[ optical glass ]
The ranges of the respective components (components) of the optical glass of the present invention are explained below. In the present invention, the contents and total contents of the respective components are all expressed in weight percent (wt%), that is, the contents and total contents of the respective components are expressed in weight percent with respect to the total amount of the glass substance converted into the composition of oxides, if not specifically stated. Here, the "composition converted to oxides" means that when oxides, complex salts, hydroxides, and the like used as raw materials of the optical glass composition component of the present invention are decomposed in the melt and converted to oxides, the total amount of the oxides is 100%.
Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. As used herein, "and/or" is inclusive, e.g., "A and/or B," and means only A, or only B, or both A and B.
< essential Components and optional Components >
B 2 O 3 Is a component for forming glass network, and has the functions of raising glass meltability and devitrification resistance and reducing glass transition temperature and density, and the invention contains more than 2% of B 2 O 3 In order to obtain the above effects, it is preferable to contain 4% or more of B 2 O 3 More preferably 5% or more of B 2 O 3 (ii) a However, if the content exceeds 18%, the glass is deteriorated in stability and the refractive index is lowered, and it is difficult to obtain the high refractive index of the present invention. Thus, in the present invention B 2 O 3 The upper limit of the content of (b) 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 the chemical stability of the glass, and also has the function of improving the thermal stability and the high-temperature viscosity of the glass; if the content exceeds 15%, the melting property of the glass tends to deteriorate and the transition temperature tends to increase. Thus, it is possible to provideSiO in the present invention 2 The content of (B) is 1 to 15%, preferably 2 to 10%, more preferably 4 to 9%.
In some embodiments, by oxidizing SiO 2 And B 2 O 3 SiO in total content 2 +B 2 O 3 The content of the glass transition metal is controlled within the range of 5-30%, so that the abrasion degree and weather resistance of the glass can be optimized while the glass forming stability of the glass is maintained, and the devitrification resistance of the glass is prevented from being reduced. Therefore, siO is preferable 2 +B 2 O 3 5 to 30%, more preferably SiO 2 +B 2 O 3 8 to 25%, and SiO is more preferable 2 +B 2 O 3 10 to 20 percent.
La 2 O 3 The glass is an effective component for improving the refractive index of the glass, has obvious effects on improving the chemical stability and the devitrification resistance of the glass, and cannot reach the required optical constant if the content of the glass is less than 35 percent; if the content is more than 65%, the devitrification tendency of the glass is rather increased and the thermal stability is deteriorated. Thus, la 2 O 3 The content of (B) is limited to 35 to 65%, preferably 40 to 60%, more preferably 42 to 55%.
Y 2 O 3 The invention can improve the refractive index and devitrification resistance of the glass and adjust the Young's modulus of the glass by containing more than 5 percent of Y 2 O 3 To obtain the above-mentioned effect; if the content exceeds 25%, the chemical stability and weather resistance of the glass are deteriorated. 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 still more preferably 8 to 15%.
In some embodiments, the SiO is 2 And B 2 O 3 SiO (total content) 2 +B 2 O 3 And Y 2 O 3 In the middle of ratio of (SiO) 2 +B 2 O 3 )/Y 2 O 3 The control is in the range of 0.2-3.5, which is beneficial to improving the bubble degree of the glass and preventing the thermal expansion coefficient of the glass from increasing. Therefore, (SiO) is preferable 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, (SiO) is more preferable 2 +B 2 O 3 )/Y 2 O 3 Is 0.5 to 2.5, and (SiO) is more preferable 2 +B 2 O 3 )/Y 2 O 3 Is 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 thereof is more than 10%, devitrification resistance and abrasion resistance of the glass are deteriorated. Thus, gd 2 O 3 The content of (b) is 0 to 10%, preferably 0 to 6%, more preferably 0 to 4%.
In some embodiments, by passing La 2 O 3 、Y 2 O 3 And Gd 2 O 3 Total content La of 2 O 3 +Y 2 O 3 +Gd 2 O 3 The control within the range of 45-75% makes it easier for the glass to obtain the desired refractive index and Abbe number, and optimizes the resistance to devitrification and weather resistance of the glass. Therefore, la is preferable 2 O 3 +Y 2 O 3 +Gd 2 O 3 From 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 Is 55 to 70 percent.
Yb 2 O 3 And is a component imparting high-refractivity, low-dispersion properties to the glass, and if the content thereof exceeds 8%, the devitrification resistance of the glass is lowered. Thus, yb 2 O 3 The content of (B) is 0 to 10%, preferably 0 to 5%, more preferably 0 to 2%, and further preferably Yb is not 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 2 2 When the content of (A) is too high, devitrification resistance of the glass is lowered, melting difficulty is increased, melting temperature is raised, and the likeInclusions appear in the glass and the light transmittance is lowered. Thus, zrO in the invention 2 The content of (B) is 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 glass in the glass, and the inventor researches and discovers that a proper amount of TiO is contained 2 The glass stability can be increased; but if too much TiO content is contained 2 The transmittance of the glass is significantly reduced, and the chemical stability of the glass tends to be deteriorated. Thus, tiO in the present invention 2 The content of (B) is 5 to 20%, preferably 6 to 18%, more preferably 8 to 15%.
In some embodiments, by reacting Y 2 O 3 In relation to TiO 2 Ratio Y between contents of 2 O 3 /TiO 2 The control is within the range of 0.3-3.0, the weather resistance of the glass can be improved, and the abrasion degree is optimized. Therefore, Y is preferred 2 O 3 /TiO 2 Is 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 Within the range of 0.5 to 1.5, the chemical stability and the bubble degree of the glass can be further improved. Therefore, Y is more preferable 2 O 3 /TiO 2 Is 0.5 to 1.5, and Y is more preferably 2 O 3 /TiO 2 Is 0.7 to 1.3.
Nb 2 O 5 Is a high-refraction high-dispersion component, can improve the refractive index and the devitrification resistance of the glass and reduce the thermal expansion coefficient of the glass, and the invention contains more than 1 percent of Nb 2 O 5 To obtain the above effects, nb is preferable 2 O 5 The lower limit of (B) is 3%, and the more preferable lower limit is 5%. If Nb 2 O 5 More than 15%, the glass is lowered in thermal stability and weather resistance and the light transmittance is lowered, so that Nb in the present invention is contained 2 O 5 The upper limit of the content of (B) is 15%, preferably 12%, more preferably 10%.
In some embodiments, by passing La 2 O 3 And TiO 2 The total content La of 2 O 3 +TiO 2 And Nb 2 O 5 Ratio between 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 range of 3.0-30.0. Therefore, (La) is preferable 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 Is 4.0 to 25.0. Further, control (La) 2 O 3 +TiO 2 )/Nb 2 O 5 In the range of 5.0 to 20.0, the thermal expansion coefficient of the glass can be further reduced, and the hardness of the glass can be improved. Therefore, (La) is more preferable 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 (A) and Y 2 O 3 Ratio Nb between contents of 2 O 5 /Y 2 O 3 By controlling the value within the range of 0.1 to 2.0, the Young's modulus of the glass can be improved and the hardness of the glass can be prevented from lowering. 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. Further, controlling 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 0.3 to 1.3, more preferably Nb 2 O 5 /Y 2 O 3 0.3 to 1.0.
The alkaline earth metal oxide RO (RO is one or more of MgO, caO, srO, and BaO) can adjust the optical constants of the glass to optimize the chemical stability of the glass, but when the content thereof is high, the devitrification resistance of the glass is lowered. Therefore, the RO content is limited to 0 to 10%, preferably 0 to 5%, and more preferably 0 to 2%. In some embodiments, it is further preferred that no RO is present.
In some embodiments, RO and Gd are administered 2 O 3 Total content of RO + Gd 2 O 3 And Y 2 O 3 Ratio between contents of (RO + Gd) 2 O 3 )/Y 2 O 3 The control is below 1.0, which is beneficial to reducing the density of the glass, improving the chemical stability of the glass and optimizing the Young modulus and the bubble degree of the glass. 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 transition temperature of the glass, adjust the optical constant and high-temperature viscosity of the glass, and improve the meltability of the glass, but when the content is high, the devitrification resistance and chemical stability of the glass are lowered. 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 When the content of (B) exceeds 5%, the glass is deteriorated in thermal stability and devitrification resistance. Thus, WO 3 The upper limit of the content of (B) is 5%, preferably 3%, more preferably 2%. In some embodiments, it is further preferred that WO is absent 3 。
In some embodiments, nb is 2 O 5 、WO 3 、Gd 2 O 3 Total content of (2) 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 increasing by controlling the concentration to be in the range of 0.1 to 3.0. Therefore, (Nb) is preferable 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 to 2.0, the thermal expansion coefficient of the glass can be further reduced, and the Young's modulus can be improved. Therefore, (Nb) is more preferable 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 Is 0.3 to 2.0, more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.4 to 1.5.
In some embodiments, WO is 3 And TiO 2 2 WO in total 3 +TiO 2 And Y 2 O 3 Ratio between contents of (WO) 3 +TiO 2 )/Y 2 O 3 The control is in the range of 0.3-3.0, which is beneficial to improving the chemical stability of the glass and optimizing the abrasion degree and Young modulus. Therefore, preferred is (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, and is more preferably (WO) 3 +TiO 2 )/Y 2 O 3 Is 0.5 to 2.0, and 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 content of ZnO is too high, the difficulty of glass forming is increased, and the devitrification 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 no ZnO is present.
In some embodiments, the combined content of RO and ZnO, RO + ZnO and Y, is 2 O 3 Is in the ratio (RO + ZnO)/Y between the contents of (A) 2 O 3 By controlling the amount to 1.0 or less, the weather resistance of the glass can be improved, the degree of abrasion can be optimized, and the deterioration of the bubble degree and the thermal expansion coefficient of the glass can be prevented. 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, and (RO + ZnO)/Y is more preferable 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 effects of improving the refractive index and the devitrification resistance of the glass, but if the content of the glass is too high, the thermal stability of the glass is reduced, and the density is increased; on the other hand, ta is compared with other components 2 O 5 The price of (2) is very expensive, and the amount of use should be minimized from the practical and cost viewpoints. Thus, ta in the present invention 2 O 5 The content of (b) 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 included 2 O 5 。
Al 2 O 3 The chemical stability of the glass can be improved, but when the content thereof exceeds 8%, the melting property and light transmittance of the glass are deteriorated. Therefore, al in the present invention 2 O 3 The content of (B) 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 functions of improving the refractive index and resisting devitrification, but if the content is too high, the chemical stability of the glass is reduced; on the other hand, geO is compared with other components 2 The price of (2) is very expensive, and the amount of use should be minimized from the practical and cost viewpoints. Accordingly, geO in the present invention 2 The content of (b) is limited to 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%, and further 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 One or more components in the glass can be used as a clarifying agent to improve the clarifying effect of the glass and improve the bubble degree of the glass, and the content of the clarifying agent is preferably 0 to 1 percent, and more preferably 0 to 0.5 percent. Since the optical glass of the present invention has reasonable design of the component types and contents and excellent bubble degree, the optical glass of the present invention is further provided in some embodimentsStep (b) preferably does not contain a clarifying agent. When Sb is present 2 O 3 At contents exceeding 2%, the glass tends to have a reduced fining ability, and since the strong oxidizing action promotes the corrosion of the platinum or platinum alloy vessel from which the glass is melted and the deterioration of the forming mold, sb is preferred in the present invention 2 O 3 The content of (B) is 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably Sb is not contained 2 O 3 . SnO and SnO 2 However, when the content exceeds 2%, the glass tends to be colored more, or when the glass is heated, softened, press-molded or the like and then reformed, sn becomes a starting point of crystal nucleus formation, and the glass tends to be devitrified. Thus the SnO of the invention 2 The content of (B) is preferably 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably not containing SnO 2 (ii) a The SnO content is preferably 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably no SnO. CeO (CeO) 2 The function and content ratio of (A) and (B) of SnO 2 The content is preferably 0 to 2%, more preferably 0 to 1%, even more preferably 0 to 0.5%, and even more preferably no CeO 2 。
In some embodiments, siO is preferred for achieving lower thermal expansion coefficient and density, higher light transmittance and blister rating, and suitable abrasion and Young's modulus for the optical glass of the present invention 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 (A) is 90% 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 (A) is 92% 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 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.
< Components not to be contained >
In the glass of the present invention, even when a small amount of oxides of transition metals such as V, cr, mn, fe, co, ni, cu, ag, and Mo is contained singly or in combination, the glass is colored and absorbs at a specific wavelength in the visible light region, thereby impairing the property of the present invention to improve the effect of visible light transmittance.
In recent years, oxides of Th, cd, tl, os, be, and Se tend to Be used as harmful chemical substances in a controlled manner, and measures for protecting the environment are required not only in the glass production process but also in the processing process and disposal after commercialization. Therefore, when importance is attached to the influence on the environment, it is preferable that these components are not substantially contained except for inevitable mixing. Thereby, the optical glass becomes practically free from substances contaminating the environment. Therefore, the optical glass of the present invention can be manufactured, processed, and discarded without taking special measures for environmental countermeasures.
In order to achieve environmental friendliness, the optical glass of the present invention preferably does not contain As 2 O 3 And PbO.
"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 within the scope of the present invention that certain impurities or components which are not intentionally added may be present as raw materials and/or equipment for producing the optical glass and may be contained in the final optical glass in small or trace amounts.
The properties of the optical glass of the present invention will be described below.
< refractive index and Abbe number >
Refractive index (n) of optical glass d ) And Abbe number (v) d ) According toThe method specified in GB/T7962.1-2010.
In some embodiments, the refractive index (n) of the optical glass of the present invention d ) The lower limit of (b) is 1.97, the preferred lower limit is 1.98, and the more preferred lower limit is 1.99.
In some embodiments, the refractive index (n) of the optical glass of the present invention d ) The upper limit of (2) is 2.10, preferably the upper limit is 2.05, and more preferably the upper limit is 2.02.
In some embodiments, the Abbe number (v) of the optical glass of the present invention d ) The lower limit of (b) is 25, preferably 26, more preferably 27, and still more preferably 28.
In some embodiments, the Abbe number (. Nu.s) of the optical glass of the present invention d ) The upper limit of (b) is 34, preferably 33, more preferably 32, and still more preferably 31.
< Density >
The density (. Rho.) of the optical glass was measured according to the method specified in GB/T7962.20-2010.
In some embodiments, the optical glass of the present invention has a density (. Rho.) of 5.20g/cm 3 Below, preferably 5.10g/cm 3 Hereinafter, more preferably 5.00g/cm 3 The following.
< coefficient of thermal expansion >
Coefficient of thermal expansion (alpha) of optical glass -30/70℃ ) The data at-30 to 70 ℃ were tested according to the method specified in GB/T7962.16-2010.
In some embodiments, the optical glass of the present invention has a coefficient of thermal expansion (α) -30/70℃ ) Is 85X 10 -7 Preferably 80X 10 or less,/K -7 A value of less than or equal to K, more preferably 75X 10 -7 and/K is less than or equal to.
< stability against Water action >
Stability to Water action of optical glasses (D) W ) (powder method) the test was carried out according to the method described in GB/T17129.
In some embodiments, the optical glass of the present invention has stability to water effects (D) W ) Is 2 or more, preferably 1.
< stability against acid Effect >
Stability of acid resistance of optical glasses (D) A ) (powder method) the test was carried out according to the method prescribed in GB/T17129.
In some embodiments, the stability to acid action of the optical glasses of the invention (D) A ) Is 2 or more, preferably 1.
< weather resistance >
The optical glass was tested for weatherability (CR) as follows: the sample is placed in a test box in a saturated water vapor environment with the relative humidity of 90 percent, and is alternately circulated at intervals of 1h at the temperature of 40-50 ℃ for 15 periods. Weather resistance categories were classified according to the amount of change in haze before and after the sample was left, and the weather resistance categories 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 (H) of optical glass K ) The test was carried out according to the test method specified in GB/T7962.18-2010.
In some embodiments, the Knoop hardness (H) of the optical glasses of the present invention K ) Is 670 multiplied by 10 7 Pa or more, preferably 680X 10 7 Pa or more, more preferably 690X 10 7 Pa or above.
< Young's modulus >
The Young modulus (E) is obtained by testing the longitudinal wave speed and the transverse wave speed of the Young modulus by adopting ultrasonic waves and then calculating according to the following formula.
G＝V S 2 ρ
In the formula: e is Young's modulus, pa;
g is shear modulus, pa;
V T is the transverse wave velocity, m/s;
V S is the longitudinal wave velocity, m/s;
rho is the density of the glass, g/cm 3 。
In some embodiments, the lower limit of the Young's modulus (E) of the optical glass of the present invention is 11500X 10 7 Pa, preferably lower limit of 12000X 10 7 Pa, more preferably a lower limit of 12500X 10 7 Pa, a further preferred lower limit is 13000X 10 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, preferably upper limit of 15000X 10 7 Pa, more preferably upper limit of 14500X 10 7 Pa, more preferably 14000X 10 7 Pa。
< degree of wear >
Degree of abrasion (F) of optical glass A ) The abrasion loss of the sample is multiplied by 100 under the same conditions, and the value is expressed by the following formula:
F A ＝V/V 0 ×100＝(W/ρ)/(W 0 /ρ 0 )×100
in the formula: v, the volume abrasion loss of the measured sample;
V 0 -the amount of wear of the standard sample volume;
w is the abrasion loss of the quality of the sample to be measured;
W 0 -abrasion loss of standard sample mass;
rho is the density of the sample to be measured;
ρ 0 -standard sample density.
In some embodiments, the optical glass of the present invention has an abrasion degree (F) A ) The lower limit of (2) is 80, preferably 85, and more preferably 90.
In some embodiments, the optical glass of the present invention has an abrasion degree (F) A ) The upper limit of (2) is 125, the upper limit is preferably 115, and the upper limit is more preferably 105.
< degree of bubbling >
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 degree of foaming of class A or more, preferably class A 0 More preferably A or more 00 And (4) stages.
[ method for producing optical glass ]
The method for manufacturing the optical glass comprises the following steps: the glass of the present invention is produced by using conventional materials and processes including but not limited to oxides, hydroxides, complex salts (such as carbonates, nitrates, sulfates, etc.), boric acid, etc. as raw materials, blending by conventional methods, then putting the blended charge into a melting furnace (such as platinum or platinum alloy crucible) at 1200-1450 ℃ to melt, and after clarification and homogenization, obtaining homogeneous molten glass without bubbles and undissolved substances, and casting and annealing the molten glass in a mold. Those skilled in the art can appropriately select the raw materials, the process method and the process parameters according to the actual needs.
Glass preform and optical element
The glass preform can be produced from the optical glass produced by press molding such as direct gob molding, grinding, or hot press molding. That is, a glass preform can be produced by direct precision gob-molding of 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 optical glass, subjecting the preform to reheat press molding, and then performing polishing processing. It should be noted that the means for producing the glass preform is not limited to the above 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 reheat press forming, precision press forming, or the like to produce optical elements such as lenses, prisms, or the like.
The glass preform of the present invention and the optical element are each formed of the above-described optical glass of the present invention. The glass preform of the present invention has excellent characteristics possessed by optical glass; the optical element of the present invention has excellent characteristics of optical glass, and can provide optical elements such as various lenses and prisms having high optical values.
Examples of the lens include various lenses such as a concave meniscus lens, a convex meniscus lens, a double convex lens, a double concave 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, camera equipment, projection equipment, display equipment, vehicle-mounted equipment, monitoring equipment and the like.
Examples
< example of optical glass >
In order to further clarify the explanation and explanation of the technical solution 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 the above-mentioned method for producing optical glasses. The characteristics of each glass were measured by the test method described in the present invention, and the measurement results are shown in tables 2 to 4.
Table 2.
Table 3.
Table 4.
< glass preform example >
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, and preforms such as prisms were produced by using the glasses obtained in examples 1 to 24# of optical glasses by means of polishing or by means of press molding such as reheat press molding and precision press molding.
< optical element example >
The preforms obtained from the above glass preform examples were annealed to reduce the internal stress of the glass and to fine-tune the refractive index so that the optical properties such as refractive index reached the desired values.
Next, each preform is ground and polished to produce 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, and a prism. The surface of the resulting optical element may be coated with an antireflection film.
< optical Instrument embodiment >
The optical element produced by the above-described optical element embodiment can be used, for example, for imaging apparatuses, sensors, microscopes, medical technologies, digital projection, communications, optical communication technologies/information transmission, optics/lighting in the automotive field, lithography, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices including such circuits and chips by forming an optical component or optical assembly by using one or more optical elements through optical design.
Claims (15)
1. Optical glass, characterized in that its components, expressed in weight percent, contain: siO 2 2 +B 2 O 3 ：5～30％；La 2 O 3 +Y 2 O 3 +Gd 2 O 3 ：45～75％；ZrO 2 ：2～15％；Nb 2 O 5 ：1～15％；TiO 2 :5 to 20 percent of Nb, wherein 2 O 5 /Y 2 O 3 Is 0.1 to 2.0.
2. An optical glass according to claim 1, characterized in that its composition, expressed in weight percent, further comprises: ta 2 O 5 :0 to 5 percent; and/or RO:0 to 10 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 10 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 10 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0-2%, RO is one or more of MgO, caO, srO and BaO, rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
3. An optical glass characterized by containing ZrO 2 、Nb 2 O 5 、TiO 2 The components of the material are expressed by weight percentage and contain 5 to 30 percent of SiO 2 +B 2 O 3 And 45 to 75% of La 2 O 3 +Y 2 O 3 +Gd 2 O 3 In which Nb is 2 O 5 /Y 2 O 3 0.1 to 2.0, a refractive index of the optical glass of 1.97 or more, an Abbe number of 25 to 34, and a Knoop hardness of H K Is 670X 10 7 Pa or more, and a Young's modulus E of 11500X 10 7 Pa～15500×10 7 Pa。
4. An optical glass according to claim 3, characterised in that its composition, expressed in weight percentage, contains: zrO (zirconium oxide) 2 :2 to 15 percent; and/or Nb 2 O 5 :1 to 15 percent; and/or TiO 2 :5 to 20 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or RO:0 to 10 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 10 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 10 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0 to 2 percent of RO, rn and one or more of MgO, caO, srO and BaO 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
5. An optical glass according to any one of claims 1 to 4, characterised in that its components, expressed in weight percentage, are: (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; and/or Nb 2 O 5 /Y 2 O 3 0.2 to 1.5, preferably Nb 2 O 5 /Y 2 O 3 0.3 to 1.3, more preferably Nb 2 O 5 /Y 2 O 3 0.3 to 1.0; and/or Y 2 O 3 /TiO 2 0.3 to 3.0, preferably Y 2 O 3 /TiO 2 Is 0.4 to 2.0, more preferably Y 2 O 3 /TiO 2 Is 0.5 to 1.5, and Y is more preferably 2 O 3 /TiO 2 0.7 to 1.3; and/or (SiO) 2 +B 2 O 3 )/Y 2 O 3 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, and (SiO) is more preferable 2 +B 2 O 3 )/Y 2 O 3 0.7 to 1.8.
6. An optical glass according to any one of claims 1 to 4, characterised in that its components, expressed in weight percentage, are: (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 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, more preferably (Nb) 2 O 5 +WO 3 +Gd 2 O 3 )/TiO 2 0.4 to 1.5; and/or (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, and (RO + ZnO)/Y is more preferable 2 O 3 Is 0.2 or less; and/or (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, and more preferably (RO + Gd) 2 O 3 )/Y 2 O 3 Is 0.3 or less; and/or (WO) 3 +TiO 2 )/Y 2 O 3 From 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, and is more preferably (WO) 3 +TiO 2 )/Y 2 O 3 0.7 to 1.5, and the RO is one or more of MgO, caO, srO and BaO.
7. An optical glass according to any one of claims 1 to 4, characterised in that its compositionExpressed in weight percent, wherein: siO 2 2 +B 2 O 3 :8 to 25%, preferably SiO 2 +B 2 O 3 :10 to 20 percent; and/or 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; and/or ZrO 2 :3 to 12%, preferably ZrO 2 :4 to 10 percent; and/or Nb 2 O 5 :3 to 12%, preferably Nb 2 O 5 :5 to 10 percent; and/or Ta 2 O 5 :0 to 3%, preferably Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :6 to 18%, preferably TiO 2 :8 to 15 percent; and/or RO:0 to 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 a clarifying agent: 0 to 1%, preferably a clarifying agent: 0 to 0.5 percent of the total weight of the catalyst, wherein the RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
8. An optical glass according to any one of claims 1 to 4, characterised in that its components, expressed in weight percentage, are: siO 2 2 :1 to 15%, preferably SiO 2 :2 to 10%, more preferably SiO 2 :4 to 9 percent; and/or B 2 O 3 :2 to 18%, preferably B 2 O 3 :4 to 12%, more preferably B 2 O 3 :5 to 10 percent; and/or La 2 O 3 :35 to 65%, preferably La 2 O 3 :40 to 60%, more preferably La 2 O 3 :42 to 55 percent; and/or Y 2 O 3 :5 to 25%, preferably Y 2 O 3 :6 to 20%, more preferably Y 2 O 3 :8 to 18%, more preferably Y 2 O 3 :8 to 15 percent; and/or Gd 2 O 3 :0 to 10%, preferably Gd 2 O 3 :0 to 6%, more preferably Gd 2 O 3 ：0～4％。
9. An optical glass according to any one of claims 1 to 4, characterised in that its composition, expressed in weight percentage, is 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, and SiO is preferred 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, 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 (A) 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 (A) is 96% or more.
10. An optical glass according to any one of claims 1 to 4, characterised in that it does not contain Ta in its composition 2 O 5 (ii) a And/or does not contain WO 3 (ii) a And/or does not contain Yb 2 O 3 (ii) a And/or does not contain RO; and/or does not contain Rn 2 O; and/or does not contain ZnO; and/or does not contain Al 2 O 3 (ii) a And/or does not contain GeO 2 The RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O.
11. The optical glass according to any one of claims 1 to 4, wherein the refractive index n of the optical glass d 1.97 to 2.10, preferably 1.98 to 2.05, more preferably 1.99 to 2.02; abbe number v d Is 25 to 34, preferably 26 to 33, more preferably 27 to 32, and still more preferably 28 to 31.
12. The optical glass according to any one of claims 1 to 4, wherein the density p of the optical glass is 5.20g/cm 3 Below, preferably 5.10g/cm 3 Hereinafter, more preferably 5.00g/cm 3 The following; and/or coefficient of thermal expansion alpha -30/70℃ Is 85X 10 -7 Preferably 80X 10 or less,/K -7 A value of not more than 75X 10 -7 below/K; and/or stability against water action D W Is 2 or more, preferably 1; and/or stability against acid action D A Is 2 or more, preferably 1; and/or the weather resistance CR is of class 2 or more, preferably of class 1; and/or Knoop hardness H K Is 670 multiplied by 10 7 Pa or more, preferably 680X 10 7 Pa or more, more preferably 690X 10 7 Pa or above; and/or a Young's modulus E of 11500X 10 7 Pa～15500×10 7 Pa, preferably 12000X 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 bubbling is class A or more, preferably class A 0 More preferably A or more 00 A stage; and/or degree of wear F A Is 80 to 125, preferably 85 to 115, and more preferably 90 to 105.
13. A glass preform, characterized by being made of the optical glass according to any one of claims 1 to 12.
14. An optical element, characterized by being made of the optical glass of any one of claims 1 to 12 or the glass preform of claim 13.
15. An optical device comprising the optical glass according to any one of claims 1 to 12 and/or comprising the optical element according to claim 14.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4584279A (en) * | 1983-12-01 | 1986-04-22 | Schott Glaswerke | Optical glass with refractive indices>1.90, Abbe numbers>25 and high chemical stability |
| CN101289276A (en) * | 2008-06-19 | 2008-10-22 | 成都光明光电股份有限公司 | High-refraction and high- dispersion optical glass and method of manufacture |
| CN102674691A (en) * | 2012-05-08 | 2012-09-19 | 湖北新华光信息材料有限公司 | Optical glass |
| US20130190162A1 (en) * | 2010-04-19 | 2013-07-25 | Cdgm Glass Co., Ltd. | Optical glass and optical element |
| JP2014062024A (en) * | 2011-12-28 | 2014-04-10 | Ohara Inc | Optical glass and optical element |
| CN107445474A (en) * | 2014-01-22 | 2017-12-08 | 成都光明光电股份有限公司 | High-refractive and high-dispersive optical glass, optical element and optical instrument |
| CN111943502A (en) * | 2020-08-03 | 2020-11-17 | 成都光明光电股份有限公司 | Optical glass, glass preform and optical element |
-
2022
- 2022-08-26 CN CN202211031100.1A patent/CN115286237A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4584279A (en) * | 1983-12-01 | 1986-04-22 | Schott Glaswerke | Optical glass with refractive indices>1.90, Abbe numbers>25 and high chemical stability |
| CN101289276A (en) * | 2008-06-19 | 2008-10-22 | 成都光明光电股份有限公司 | High-refraction and high- dispersion optical glass and method of manufacture |
| US20130190162A1 (en) * | 2010-04-19 | 2013-07-25 | Cdgm Glass Co., Ltd. | Optical glass and optical element |
| JP2014062024A (en) * | 2011-12-28 | 2014-04-10 | Ohara Inc | Optical glass and optical element |
| CN102674691A (en) * | 2012-05-08 | 2012-09-19 | 湖北新华光信息材料有限公司 | Optical glass |
| CN107445474A (en) * | 2014-01-22 | 2017-12-08 | 成都光明光电股份有限公司 | High-refractive and high-dispersive optical glass, optical element and optical instrument |
| CN111943502A (en) * | 2020-08-03 | 2020-11-17 | 成都光明光电股份有限公司 | Optical glass, glass preform and optical element |
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