CN115466049A - Optical glass - Google Patents

Optical glass Download PDF

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Publication number
CN115466049A
CN115466049A CN202211272941.1A CN202211272941A CN115466049A CN 115466049 A CN115466049 A CN 115466049A CN 202211272941 A CN202211272941 A CN 202211272941A CN 115466049 A CN115466049 A CN 115466049A
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percent
bao
less
sio
glass
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CN115466049B (en
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孙伟
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CDGM Glass Co Ltd
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CDGM Glass Co Ltd
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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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

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

Abstract

The invention provides an optical glass, which comprises the following components in percentage by weight: siO 2 2 ：26～42％；Nb 2 O 5 ：21～40％；ZrO 2 ：0.5～12％；RO：7～35％；Na 2 O:3 to 18 percent of them, wherein RO/Nb 2 O 5 0.2 to 1.5, and the RO is the total content of MgO, caO, srO and BaO. Through reasonable component design, the optical glass obtained by the invention has lower density and excellent light transmittance, and meets the application of high-end photoelectric products.

Description

Optical glass
Technical Field
The present invention relates to an optical glass, and particularly to an optical glass having a low density and an excellent light transmittance.
Background
In recent years, with the rapid progress of digitization and high precision of optical systems, demands for weight reduction and size reduction of the entire optical system have been increasing in photographic apparatuses such as digital cameras and video cameras, and optical apparatuses such as image reproducing (projection) apparatuses such as projectors and projection televisions, and it is advantageous to achieve weight reduction of the optical system by using optical glass having a low density in the optical system. Patent documents related to the study of low-density optical glass are disclosed in the prior art, for example, CN108689595A discloses a low-density optical glass with a refractive index of 1.67 to 1.77 and an Abbe number of 26 to 33, but the transmittance is low, and in the disclosed examples, the λ is 80 Most preferably 421nm, lambda 70 Optimally 399nm, lambda 5 Most preferably 360nm. Poor light transmittance can affect the optical systemThe imaging effect of (2), and further, the application of the optical glass is limited. Therefore, the development of an optical glass with lower density and excellent light transmittance is of great significance to the development of the photoelectric field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an optical glass with lower density and excellent light transmittance.
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 ：26～42％；Nb 2 O 5 ：21～40％；ZrO 2 ：0.5～12％；RO：7～35％；Na 2 O:3 to 18 percent of them, wherein RO/Nb 2 O 5 0.2 to 1.5, and the RO is the total content of MgO, caO, srO and BaO.
(2) The optical glass according to (1), which comprises the following components in percentage by weight: b is 2 O 3 :0 to 10 percent; and/or Li 2 O:0 to 5 percent; and/or K 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Ln 2 O 3 :0 to 5 percent; and/or Al 2 O 3 :0 to 5 percent; and/or a clarifying agent: 0 to 1 percent of Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of Sb as clarifying agent 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(3) Optical glass containing SiO 2 、Nb 2 O 5 、ZrO 2 、Na 2 O is taken as an essential component, the component of the O also contains 7 to 35 percent of RO in percentage by weight, wherein RO/Nb 2 O 5 0.2 to 1.5, RO is the total content of MgO, caO, srO and BaO, and the refractive index n of the optical glass d 1.68 to 1.76, abbe number v d 30 to 39, and a density rho of 3.8g/cm 3 Hereinafter, λ 80 Less than or equal to 400nm, lambda 5 Less than or equal to 350nm.
(4) The optical glass according to (3), which comprises the following components in percentage by weight: siO 2 2 :26 to 42 percent; and/or Nb 2 O 5 :21 to 40 percent; and/or ZrO 2 :0.5 to 12 percent; and/or Na 2 O:3 to 18 percent; and/or B 2 O 3 :0 to 10 percent; and/or Li 2 O:0 to 5 percent; and/or K 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Ln 2 O 3 :0 to 5 percent; and/or Al 2 O 3 :0 to 5 percent; and/or a clarifying agent: 0 to 1 percent of Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of Sb as clarifying agent 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: RO/Nb 2 O 5 0.3 to 1.2, preferably RO/Nb 2 O 5 Is 0.4 to 1.0, and RO/Nb is more preferable 2 O 5 0.4 to 0.8; and/or RO/SiO 2 0.2 to 1.2, preferably RO/SiO 2 Is 0.25 to 1.0, and RO/SiO is more preferable 2 0.3 to 0.8, and further preferably RO/SiO 2 0.4 to 0.7; and/or (SiO) 2 +Nb 2 O 5 ) A ratio of/BaO of 2.5 to 10.0, preferably (SiO) 2 +Nb 2 O 5 ) The ratio of/BaO is 3.0 to 8.0, more preferably (SiO) 2 +Nb 2 O 5 ) The ratio of/BaO is 3.5 to 7.0, and (SiO) is more preferable 2 +Nb 2 O 5 ) The ratio of/BaO is 4.0-6.0; and/or (BaO + CaO)/Na 2 O is 0.5 to 5.0, preferably (BaO + CaO)/Na 2 O is 0.8 to 4.0, and (BaO + CaO)/Na is more preferable 2 O is 1.0 to 3.0, and (BaO + CaO)/Na is more preferable 2 O is 1.2 to 2.5; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 0.6 to 2.0, preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 0.7 to 1.7, more preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 0.8 to 1.5, and (Na) is more preferable 2 O+Nb 2 O 5 )/SiO 2 The content of RO is 1.0 to 1.5, and the total content of MgO, caO, srO and BaO is described.
(6) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: b 2 O 3 /SiO 2 Is 0.3 or less, preferably B 2 O 3 /SiO 2 Is 0.25 or less, more preferably B 2 O 3 /SiO 2 Is 0.2 or less, and B is more preferably B 2 O 3 /SiO 2 0.01 to 0.15; and/or B 2 O 3 A ratio of/BaO of 1.4 or less, preferably B 2 O 3 A value of/BaO of 1.0 or less, and B is more preferably 2 O 3 BaO is 0.8 or less, and B is more preferable 2 O 3 The ratio of/BaO is 0.1-0.5; and/or (ZrO) 2 + ZnO)/BaO is 0.05 to 1.5, preferably (ZrO) 2 + ZnO)/BaO is 0.1 to 1.0, more preferably (ZrO) 2 + ZnO)/BaO is 0.15 to 0.8, and (ZrO) is more preferable 2 + ZnO)/BaO is 0.2-0.6; and/or (B) 2 O 3 +Li 2 O+TiO 2 )/
(BaO+Nb 2 O 5 ) Is 0.5 or less, preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.3 or less, more preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.2 or less, more preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) 0.01 to 0.15.
(7) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: siO 2 2 :28 to 40%, preferably SiO 2 :30 to 37 percent; and/or B 2 O 3 :0 to 6%, preferably B 2 O 3 :0.5 to 5 percent; and/or Nb 2 O 5 :25 to 35%, preferably Nb 2 O 5 :27 to 33 percent; and/or ZrO 2 :1 to 10%, preferably ZrO 2 :2 to 8 percent; and/or RO:11 to 30%, preferably RO:13 to 25 percent; and/or Na 2 O:5 to 15%, preferably Na 2 O:7 to 13 percent; and/or Li 2 O:0 to 3%, preferably Li 2 O:0 to 2 percent; and/or K 2 O:0 to 5%, preferably K 2 O:0 to 3 percent; and/or WO 3 :0 to 3%, preferably WO 3 :0 to 1 percent; and/or Ta 2 O 5 :0 to 3%, preferably Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :0 to 3%, preferably TiO 2 :0 to 1 percent; and/or ZnO:0 to 4%, preferably ZnO:0 to 1 percent; and/or Ln 2 O 3 :0 to 3%, preferably Ln 2 O 3 :0 to 1 percent; and/or Al 2 O 3 :0 to 3%, preferably Al 2 O 3 :0 to 1 percent; and/or a clarifying agent: 0 to 0.8%, preferably clarifying agent: 0 to 0.5 percent, the RO is the total content of MgO, caO, srO and BaO, ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of Sb as clarifying agent 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: baO:6 to 20%, preferably BaO:8 to 18%, more preferably BaO:10 to 16 percent; and/or MgO:0 to 6%, preferably MgO:0 to 3%, more preferably MgO:0 to 1 percent; and/or CaO:0 to 10%, preferably CaO:0.5 to 8%, more preferably CaO:1 to 6 percent; and/or SrO:0 to 6%, preferably SrO:0 to 3%, more preferably SrO:0 to 1 percent.
(9) The optical glass according to any one of (1) to (4), wherein the component does not contain TiO 2 (ii) a And/or does not contain WO 3 (ii) a And/or does not contain Ta 2 O 5 (ii) a And/or no ZnO; and/or does not contain Ln 2 O 3 (ii) a And/or do not contain Li 2 O; and/or does not contain Al 2 O 3 Said Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of (a).
(10) The optical glass according to any one of (1) to (4) above, having a refractive index n d 1.68 to 1.76, preferably 1.69 to 1.75, more preferably 1.70 to 1.74, still more preferably 1.71 to 1.74, and/or Abbe number v d Is 30 to 39, preferably 31 to 38, more preferably 32 to 37, and still more preferably 34 to 37.
(11) The relative partial dispersion P of the optical glass according to any one of (1) to (4) g,F Is 0.7500 or less, preferably 0.7000 or less, more preferably 0.6500 or less, further preferably 0.6000 or less, and/or a relative partial dispersion deviation value Δ P g,F Is less than 0, preferably-0.0001 or less, more preferably-0.0005 or less, and further preferably-0.0010 or less.
(12) The optical glass according to any one of (1) to (4) having a density ρ of 3.8g/cm 3 Hereinafter, it is preferably 3.7g/cm 3 Hereinafter, more preferably 3.6g/cm 3 The following; and/or coefficient of thermal expansion alpha -30/70℃ Is 95X 10 -7 Preferably 90X 10 or less,/K -7 A value of not more than 85X 10 -7 below/K; and/or lambda 80 Less than or equal to 400nm, preferably lambda 80 Less than or equal to 390nm, more preferably lambda 80 385nm or less; and/or lambda 5 Less than or equal to 350nm, preferably lambda 5 Less than or equal to 340nm, more preferably lambda 5 Less than or equal to 335nm; and/or the weather resistance CR is of class 2 or more, preferably of class 1; and/or stability against acid action D A Is 2 or more, preferably 1; and/or stability against water action D W Is 2 or more, preferably 1; and/or Knoop hardness H K Is 500X 10 7 Pa or more, preferably 510X 10 7 Pa or more, more preferably 520X 10 7 Pa is above; and/or degree of wear F A 180 to 220, preferably 185 to 215, more preferably 190 to 210; and/or a Young's modulus E of 8000X 10 7 ～11000×10 7 Pa, preferably 8500X 10 7 ～10500×10 7 Pa, more preferably 9000X 10 7 ～10000×10 7 Pa。
(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 lower density and excellent light transmittance, and meets the application of high-end photoelectric products.
Detailed Description
The optical glass of the present invention is obtained by the following steps, which are not limited to the above-described embodiments, and can be appropriately modified within the scope of the object 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 A alone, B alone, or both A and B.
< essential Components and optional Components >
SiO 2 Is an essential component of the optical glass of the present invention, is a skeleton of the optical glass of the present invention, and can improve the acid resistance and viscosity of the glass and reduce the abrasion degree of the glass, in the present invention, by containing SiO in an amount of 26% or more 2 To obtain the above effects, it is preferable to contain 28% or more of SiO 2 More preferably, it contains 30% or more of SiO 2 . On the other hand, if SiO 2 When the content of (B) is too large, the melting property of the glass is deteriorated, the high-temperature viscosity is increased, and inclusions such as bubbles and stones are liable to appear in the glass. Thus, siO in the present invention 2 The upper limit of the content of (b) is 42%, preferably 40%, more preferably 37%.
B 2 O 3 Has the effect of improving the thermal stability and melting property of the glass, but when the content thereof is more than 10%, the chemical stability, weather resistance and devitrification resistance of the glass are lowered. Thus, in the present invention B 2 O 3 The content of (b) is 0 to 10%, preferably 0 to 6%, more preferably 0.5 to 5%.
In some embodiments, B is 2 O 3 Content of (D) and SiO 2 Ratio B between contents of 2 O 3 /SiO 2 The control below 0.3 is beneficial to improving the weather resistance and Young modulus of the glass and improving the light transmittance of the glass. Therefore, B is preferred 2 O 3 /SiO 2 Is 0.3 or less, and B is more preferably 2 O 3 /SiO 2 Is 0.25 or less, and B is more preferably B 2 O 3 /SiO 2 Is 0.2 or less, and B is more preferably B 2 O 3 /SiO 2 0.01 to 0.15.
ZrO 2 Can improve the refractive index of the glass, simultaneously improve the chemical stability of the glass, adjust the short-wave special dispersion and reduce the delta P of the glass g,F If the content is too large, the difficulty of melting the glass increases, the melting temperature rises, and this leads toInclusions appear in the glass and the light transmittance is lowered. Thus, zrO 2 The content of (B) is 0.5 to 12%, preferably 1 to 10%, more preferably 2 to 8%.
In some embodiments, controlling the content of alkaline earth oxide RO (RO being the total content of MgO, caO, srO, and BaO) to be in the range of 7 to 35% makes it easier for the glass to obtain desired optical constants, and optimizes the chemical stability and abrasion of the glass. Therefore, RO is preferably 7 to 35%, more preferably 11 to 30%, and still more preferably 13 to 25%.
In some embodiments, the amount of RO is related to SiO 2 Ratio between contents of RO/SiO 2 Controlling the hardness of the glass within the range of 0.2-1.2 can improve the hardness of the glass and prevent the chemical stability of the glass from being deteriorated. Therefore, RO/SiO is preferable 2 Is 0.2 to 1.2, and RO/SiO is more preferable 2 0.25 to 1.0. Further, control of RO/SiO 2 In the range of 0.3 to 0.8, the abrasion degree and Young's modulus of the glass can be further optimized. Therefore, RO/SiO is more preferable 2 0.3 to 0.8, and RO/SiO is more preferable 2 0.4 to 0.7.
MgO can reduce the relative partial dispersion of the glass, but when the content of MgO is too much, the refractive index of the glass is difficult to meet the design requirement, and the anti-crystallization performance and the stability of the glass are reduced. Therefore, the content of MgO is limited to 0 to 6%, preferably 0 to 3%, and more preferably 0 to 1%. In some embodiments, it is further preferred that MgO is not included.
CaO can adjust the optical constant of the glass, improve the chemical stability of the glass, improve the processability of the glass, reduce the high-temperature viscosity and the surface tension of the glass, and reduce the production difficulty of the glass, and if the content of CaO is too high, the devitrification resistance of the glass is reduced. Therefore, the content of CaO is 0 to 10%, preferably 0.5 to 8%, more preferably 1 to 6%.
While SrO can adjust the refractive index and Abbe number of the glass, if the content is too large, the chemical stability of the glass is lowered and the cost of the glass is rapidly increased. Therefore, the content of SrO is limited to 0 to 6%, preferably 0 to 3%, and more preferably 0 to 1%. In some embodiments, it is further preferred that SrO is absent.
BaO can improve the refractive index, the melting property and the thermal stability of the glass, improve the abrasion degree and the light transmittance of the glass, if the content is too high, the density of the glass increases and the devitrification resistance decreases. Therefore, the content of BaO is 6 to 20%, preferably 8 to 18%, more preferably 10 to 16%.
In some embodiments, B is 2 O 3 Ratio B between the content of (B) and the content of BaO 2 O 3 The content of/BaO is controlled to 1.4 or less, so that the chemical stability and Young's modulus of the glass can be improved, and the hardness of the glass can be prevented from being deteriorated. Therefore, B is preferred 2 O 3 A value of/BaO of 1.4 or less, more preferably B 2 O 3 A BaO of 1.0 or less, and further preferably B 2 O 3 A value of/BaO of 0.8 or less, and further preferably B 2 O 3 The ratio of/BaO is 0.1-0.5.
Nb 2 O 5 Is a high-refraction high-dispersion component, can improve the refractive index, dispersion and devitrification resistance of the glass, reduce the thermal expansion coefficient of the glass and does not obviously improve P g,F Value sum Δ P g,F Value, if Nb 2 O 5 Too much content of (b) reduces the thermal stability and weather resistance of the glass, and reduces the light transmittance. Thus, nb 2 O 5 The content of (b) is in the range of 21 to 40%, preferably 25 to 35%, more preferably 27 to 33%.
In some embodiments, the amount of RO is related to Nb 2 O 5 Ratio between contents of RO/Nb 2 O 5 The light transmittance of the glass can be improved while the density of the glass is reduced by controlling the concentration to be within the range of 0.2 to 1.5. Therefore, RO/Nb is preferable 2 O 5 0.2 to 1.5, and RO/Nb is more preferable 2 O 5 Is 0.3 to 1.2. Further, control of RO/Nb 2 O 5 In the range of 0.4 to 1.0, the abrasion degree and the thermal expansion coefficient of the glass can be further optimized. Therefore, RO/Nb is more preferable 2 O 5 0.4 to 1.0, and RO/Nb is more preferable 2 O 5 0.4 to 0.8.
In some embodiments, the SiO is 2 And Nb 2 O 5 SiO (total content) 2 +Nb 2 O 5 Ratio to the content of BaO (SiO) 2 +Nb 2 O 5 ) The content of/BaO is controlled within the range of 2.5-10.0, so that the glass has lower P g,F Value sum Δ P g,F At the same time, the thermal expansion coefficient of the glass is reduced. Therefore, (SiO) is preferable 2 +Nb 2 O 5 ) The ratio of/BaO is 2.5 to 10.0, more preferably (SiO) 2 +Nb 2 O 5 ) The ratio of/BaO is 3.0-8.0. Further, control (SiO) 2 +Nb 2 O 5 ) the/BaO is in the range of 3.5-7.0, and the abrasion degree and the weather resistance of the glass can be further optimized. Therefore, (SiO) is more preferable 2 +Nb 2 O 5 ) The ratio of/BaO is 3.5 to 7.0, more preferably (SiO) 2 +Nb 2 O 5 ) The ratio of/BaO is 4.0-6.0.
Li 2 O can lower the glass transition temperature, adjust the high-temperature viscosity of the glass and improve the meltability of the glass, but the high content of O is unfavorable for the glass stability and the cost economy. Thus, li in the present invention 2 The content of O is 5% or less, preferably 3% or less, and more preferably 2% or less. In some embodiments, it is further preferred not to contain Li 2 O。
Na 2 O has the function of improving the meltability of the glass, can improve the melting effect of the glass and is also beneficial to reducing the P of the glass g,F Value sum Δ P g,F The amount of Na contained in the composition is 3% or more 2 O to obtain the above effects. If Na 2 The content of O exceeds 18%, the chemical stability and weather resistance of the glass are lowered, and therefore Na 2 The content of O is 3 to 18%, preferably Na 2 The content of O is 5 to 15%, more preferably Na 2 The content of O is 7 to 13 percent.
In some embodiments, na is substituted with sodium hydroxide 2 O and Nb 2 O 5 Total content of (3) Na 2 O+Nb 2 O 5 With SiO 2 Ratio between contents of (Na) 2 O+Nb 2 O 5 )/SiO 2 The content of the P in the glass can be controlled within the range of 0.6-2.0 g,F Value sum Δ P g,F The abrasion degree of the glass is optimized at the same time of the value. Therefore, it is excellentSelecting (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 0.6 to 2.0, more preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 0.7 to 1.7. Further, control (Na) 2 O+Nb 2 O 5 )/SiO 2 In the range of 0.8 to 1.5, the weather resistance of the glass can be further improved, and the density of the glass can be prevented from increasing. Therefore, (Na) is more preferable 2 O+Nb 2 O 5 )/SiO 2 Is 0.8 to 1.5, more preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 1.0 to 1.5.
In some embodiments, the combined content of BaO and CaO is BaO + CaO and Na 2 Ratio between the contents of O (BaO + CaO)/Na 2 The O is controlled within the range of 0.5 to 5.0, so that the glass has lower P g,F Value sum Δ P g,F At the same time, the chemical stability of the glass is improved, and the increase of the glass density is prevented. Therefore, (BaO + CaO)/Na is preferable 2 O is 0.5 to 5.0, more preferably (BaO + CaO)/Na 2 O is 0.8 to 4.0. Further, control of (BaO + CaO)/Na 2 O is in the range of 1.0 to 3.0, and the Young modulus and the weather resistance of the glass can be further optimized. Therefore, (BaO + CaO)/Na is more preferable 2 O is 1.0 to 3.0, and (BaO + CaO)/Na is more preferable 2 O is 1.2 to 2.5.
K 2 O has an effect of improving the thermal stability and melting property of the glass, but if the content thereof exceeds 8%, devitrification resistance and chemical stability of the glass deteriorate. Therefore, K in the present invention 2 The content of O is 0 to 8%, preferably K 2 The content of O is 0 to 5%, more preferably 0 to 3%.
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 1%. In some embodiments, it is further preferred not to contain WO 3 。
Ta 2 O 5 Has the functions of improving refractive index and devitrification resistance of glass, but the content is too high, and the glass is stable thermallyThe properties are reduced, the density is increased, and the optical constants are difficult to control to a desired range; 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%, and further preferably Ta is not contained 2 O 5 。
TiO 2 Has the function of improving the refractive index and dispersion of the glass, and the proper content of the glass can make the glass more stable and reduce the viscosity of the glass. If TiO 2 The content of (B) exceeds 5%, the glass tends to be more devitrified, the transition temperature rises, and P of the glass rises g,F Value sum Δ P g,F The value becomes large. Thus, tiO in the present invention 2 The content of (A) is 5% or less, preferably 3% or less, more preferably 1% or less, and further preferably contains no TiO 2 。
In some embodiments, B is 2 O 3 、Li 2 O、TiO 2 Total content of (B) 2 O 3 +Li 2 O+TiO 2 With BaO and Nb 2 O 5 Total content of (B) BaO + Nb 2 O 5 Ratio (B) therebetween 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Controlling the glass to be less than 0.5 can improve the chemical stability of the glass and prevent the light transmittance of the glass from being reduced. Therefore, (B) is preferred 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.5 or less, more preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.3 or less. Further, controlling (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Below 0.2, the hardness and thermal expansion coefficient of the glass can be further optimized. Therefore, (B) is more preferable 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.2 or less, more preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.01 to 0.15。
ZnO can adjust the refractive index and dispersion of the glass, reduce the high-temperature viscosity and transition temperature of the glass, and enable the glass to be smelted at a lower temperature, thereby improving the light transmittance of the glass. If the content of ZnO is too high, the difficulty of glass forming is increased, the devitrification resistance is deteriorated, and the negative anomalous dispersion of the glass is not favorably obtained. Therefore, the content of ZnO is 0 to 8%, preferably 0 to 4%, more preferably 0 to 1%. In some embodiments, it is further preferred that no ZnO is present.
In some embodiments, zrO is reacted with 2 And the total content of ZnO ZrO 2 Ratio between content of + ZnO and BaO (ZrO) 2 The content of + ZnO)/BaO is controlled within the range of 0.05-1.5, so that the glass can have lower P g,F Value sum Δ P g,F At the same time, the Young's modulus of the glass is prevented from deteriorating. Therefore, (ZrO) is preferable 2 + ZnO)/BaO is 0.05 to 1.5, more preferably (ZrO) 2 + ZnO)/BaO is 0.1-1.0. Further, control (ZrO) 2 The content of + ZnO)/BaO is within the range of 0.15-0.8, and the thermal expansion coefficient of the glass can be further reduced, and the hardness of the glass can be improved. Therefore, (ZrO) is more preferable 2 + ZnO)/BaO is 0.15 to 0.8, more preferably (ZrO) 2 + ZnO)/BaO is 0.2-0.6.
Ln 2 O 3 (Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more) is a component for improving the refractive index and chemical stability of the glass by adding Ln 2 O 3 The content of (B) is controlled to 5% or less, and deterioration of devitrification resistance of the glass can be prevented, and Ln is preferred 2 O 3 The upper limit of the content range of (B) is 3%, and the more preferable upper limit is 1%. In some embodiments, it is further preferred that Ln is absent 2 O 3 。
Al 2 O 3 The chemical stability of the glass can be improved, but when the content thereof exceeds 5%, the meltability and light transmittance of the glass are deteriorated. Therefore, al in the present invention 2 O 3 The content of (B) is 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%. In thatIn some embodiments, it is further preferred that Al is not present 2 O 3 。
In the invention, 0 to 1 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 0.8 percent, and more preferably 0 to 0.5 percent. When Sb is present 2 O 3 At contents exceeding 1%, 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 1%, more preferably 0 to 0.8%, and still more preferably 0 to 0.5%. SnO and SnO 2 However, when the content exceeds 1%, 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 1%, more preferably 0 to 0.8%, and still more preferably 0 to 0.5%; the SnO content is preferably 0 to 1%, more preferably 0 to 0.8%, and still more preferably 0 to 0.5%. CeO (CeO) 2 The function and content ratio of (A) and (B) of SnO 2 The content is preferably 0 to 1%, more preferably 0 to 0.8%, even more preferably 0 to 0.5%, and even more preferably no CeO 2 。
< 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.
"0%" or "0%" is not contained in the present invention, and means that the compound, molecule, element or the like is not intentionally added to the optical glass of the present invention as a raw material; 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 performance 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 ) The test was carried out according to the 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 1.68, preferably 1.69, more preferably 1.70, and still more preferably 1.71. In some embodiments, the refractive index (n) of the optical glass of the present invention d ) The upper limit of (b) is 1.76, preferably the upper limit is 1.75, and more preferably the upper limit is 1.74.
In some embodiments, the Abbe number (v) of the optical glass of the present invention d ) The lower limit of (2) is 30, preferably 31, more preferably 32, still more preferably 33, and yet more preferably 34. In some embodiments, the Abbe number (. Nu.s) of the optical glass of the present invention d ) The upper limit of (2) is 39, preferably 38, more preferably 37.
< 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 3.8g/cm 3 Hereinafter, it is preferably 3.7g/cm 3 Hereinafter, more preferably 3.6g/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 95X 10 -7 Preferably 90X 10 or less,/K -7 A value of not more than 85X 10 -7 and/K is less than or equal to.
< degree of coloration >
Coloring degree (. Lamda.) for short-wave transmission spectral characteristics of the glass of the present invention 80 And λ 5 ) And (4) showing. Lambda [ alpha ] 80 It refers to the wavelength corresponding to the glass transmittance of 80%. Lambda 80 Was measured using a glass having a thickness of 10. + -. 0.1mm with two opposing planes parallel to each other and optically polished, measuring the spectral transmittance in the wavelength region from 280nm to 700nm and showing a wavelength of transmittance of 80%. The spectral transmittance or transmittance is the intensity I of light incident perpendicularly to the surface of the glass in Light transmitted through the glass and having an intensity I emitted from a plane out In the case of light of (1) through (I) out /I in The quantity expressed and also the transmission of the surface reflection losses on the above-mentioned surface of the glass. The higher the refractive index of the glass, the greater the surface reflection loss. Thus, in the glass, λ 80 A small value of (A) means that the glass itself is rarely colored and has a high light transmittance.
In some embodiments, the lambda of the optical glass of the present invention 80 Less than or equal to 400nm, preferably lambda 80 Less than or equal to 390nm, more preferably lambda 80 Less than or equal to 385nm.
In some embodiments, the λ of the optical glass of the present invention 5 Is less than or equal toEqual to 350nm, preferably λ 5 Less than or equal to 340nm, more preferably lambda 5 Less than or equal to 335nm.
< 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. The weather resistance categories were classified according to the amount of change in turbidity before and after the sample was left, and the weather resistance categories are shown in table 1:
table 1.
Figure BDA0003895815360000131
In some embodiments, the optical glass of the present invention has a weatherability (CR) of 2 or more, preferably 1 or more.
< 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 500X 10 7 Pa or more, preferably 510X 10 7 Pa or more, more preferably 520X 10 7 Pa or above.
< relative partial dispersion and relative partial dispersion deviation value >
The relative partial dispersion (P) is illustrated by the following equation g,F ) And relative partial dispersion deviation value (Δ P) g,F ) The origin of (1).
The relative partial dispersion for wavelengths x and y is represented by the following formula (1):
P x,y ＝(n x -n y )/(n F -n C ) (1)
the following formula (2) holds for most of the so-called "normal glasses" according to the Abbe number formula (hereinafter, H-K6 and F4 are used as "normal glasses")
P x,y ＝m x,y ·v d +b x,y (2)
This linear relationship is P x,y Is ordinate, v d Expressed on the abscissa, where m x,y Is a slope, b x,y Is the intercept.
It is known that the correction of the secondary spectrum, i.e. the achromatization of more than two wavelengths, requires at least one glass which does not conform to the above formula (2) (i.e. its P) x,y Value deviation from Abbe's empirical formula) by Δ P x,y Indicates that each P is x,y -v d The point being shifted by Δ P with respect to a "normal line" corresponding to the above formula (2) x,y Amount of such a.DELTA.P of each glass x,y The numerical value can be obtained by the following equation (3):
P x,y ＝m x,y ·v d +b x,y +ΔP x,y (3)
thus Δ P x,y Quantitatively indicating the deviation behavior of the specific dispersion when compared to "normal glass".
Therefore, from the above, relative partial dispersion (P) can be obtained g,F ) And relative partial dispersion deviation value (Δ P) g,F ) Are the following formulas (4) and (5):
P g,F ＝(n g -n F )/(n F -n C ) (4)
ΔP g,F ＝P g,F -0.6457+0.001703v d (5)
in some embodiments, the relative partial dispersion (P) of the optical glasses of the present invention g,F ) Is 0.7500 or less, preferably 0.7000 or less, more preferably 0.6500 or less, and further preferably 0.6000 or less.
In some embodiments, the optical glasses of the present invention have a relative partial dispersion deviation value (Δ P) g,F ) Is less than 0, preferably-0.0001 or less, more preferably-0.0005 or less, and further preferably-0.0010 or less.
< degree of abrasion >
Degree of abrasion (F) of optical glass A ) Means that the abrasion loss of the sample is equal to that of the sample under the same conditionsThe abrasion loss (volume) ratio of the standard sample (H-K9 glass) was multiplied by 100 to obtain a value, and the value was expressed by the following equation:
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 abrasion loss by volume of the standard sample;
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 ) Has a lower limit of 180, preferably 185, more preferably 190, and a degree of wear (F) A ) Is 220, preferably 215, more preferably 210.
< stability against Water Effect >
Stability to Water action of optical glasses (D) W ) (powder method) the test was carried out according to the method prescribed in GB/T17129.
In some embodiments, the stability to water action of the optical glasses of the invention (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.
< Young's modulus >
The Young modulus (E) is obtained by measuring the longitudinal wave velocity and the transverse wave velocity of the Young modulus by ultrasonic waves and calculating according to the following formula.
Figure BDA0003895815360000151
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 8000X 10 7 Pa, preferably lower limit of 8500X 10 7 Pa or more, and more preferably 9000X 10 as the lower limit 7 Pa or above.
In some embodiments, the optical glass of the present invention has an upper limit of Young's modulus (E) of 11000X 10 7 Pa, preferably upper limit of 10500X 10 7 Pa, more preferably the upper limit is 10000X 10 7 Pa。
[ method for producing optical glass ]
The method for manufacturing 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 oxides, hydroxides, composite salts (such as carbonates, nitrates, sulfates and the like) and boric acid and the like as raw materials, after being mixed by a conventional method, the mixed furnace materials are put into a smelting furnace (such as a platinum or platinum alloy crucible) with the temperature of 1200-1500 ℃ for smelting, and after being clarified and homogenized, 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 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 direct gob casting, grinding, or press molding such as 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 to produce optical elements such as lenses and prisms by reheat press forming, precision press forming, and 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 instruments ]
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.
Figure BDA0003895815360000171
Figure BDA0003895815360000181
Table 3.
Figure BDA0003895815360000182
Figure BDA0003895815360000191
Table 4.
Figure BDA0003895815360000192
Figure BDA0003895815360000201
Figure BDA0003895815360000211
< 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 prisms. The surface of the resulting optical element may be coated with an antireflection film.
< optical Instrument example >
The optical element produced by the above-described optical element embodiments can be used, for example, for imaging devices, sensors, microscopes, medical technology, digital projection, communication, 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 an optical component or optical assembly using one or more optical elements.

Claims (15)

1. Optical glass, characterized in that its components, expressed in weight percent, contain: siO 2 2 ：26～42％；Nb 2 O 5 ：21～40％；ZrO 2 ：0.5～12％；RO：7～35％；Na 2 O:3 to 18 percent of them, wherein RO/Nb 2 O 5 0.2 to 1.5, and the RO is the total content of MgO, caO, srO and BaO.
2. An optical glass according to claim 1, characterised in that it further comprises, in percentages by weight: b is 2 O 3 :0 to 10 percent; and/or Li 2 O:0 to 5 percent; and/or K 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Ln 2 O 3 :0 to 5 percent; and/or Al 2 O 3 :0 to 5 percent; and/or a clarifying agent: 0 to 1 percent of Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of Sb as clarifying agent 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
3. An optical glass characterized by containing SiO 2 、Nb 2 O 5 、ZrO 2 、Na 2 O is taken as an essential component, the component of the O also contains 7 to 35 percent of RO in percentage by weight, wherein RO/Nb 2 O 5 0.2 to 1.5, RO is the total content of MgO, caO, srO and BaO, and the refractive index n of the optical glass d Is 1.68 to 1.76, abbe number v d 30 to 39, and a density rho of 3.8g/cm 3 Hereinafter, λ 80 Less than or equal to 400nm, lambda 5 Less than or equal to 350nm.
4. An optical glass according to claim 3, characterised in that its composition, expressed in weight percentage, contains: siO 2 2 :26 to 42 percent; and/or Nb 2 O 5 :21 to 40 percent; and/or ZrO 2 :0.5 to 12 percent; and/or Na 2 O:3 to 18 percent; and/or B 2 O 3 :0 to 10 percent; and/or Li 2 O:0 to 5 percent; and/or K 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Ln 2 O 3 :0 to 5 percent; and/or Al 2 O 3 :0 to 5 percent; and/or a clarifying agent: 0 to 1 percent of Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of Sb as clarifying agent 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: RO/Nb 2 O 5 0.3 to 1.2, preferably RO/Nb 2 O 5 0.4 to 1.0, and RO/Nb is more preferable 2 O 5 0.4 to 0.8; and/or RO/SiO 2 0.2 to 1.2, preferably RO/SiO 2 Is 0.25 to 1.0, and RO/SiO is more preferable 2 0.3 to 0.8, and further preferably RO/SiO 2 0.4 to 0.7; and/or (SiO) 2 +Nb 2 O 5 ) A ratio of/BaO of 2.5 to 10.0, preferably (SiO) 2 +Nb 2 O 5 ) The ratio of/BaO is 3.0 to 8.0, more preferably (SiO) 2 +Nb 2 O 5 ) The ratio of/BaO is 3.5 to 7.0, and (SiO) is more preferable 2 +Nb 2 O 5 ) The ratio of/BaO is 4.0-6.0; and/or (BaO + CaO)/Na 2 O is 0.5 to 5.0, preferably (BaO + CaO)/Na 2 O is 0.8 to 4.0, and (BaO + CaO)/Na is more preferable 2 O is 1.0 to 3.0, and (BaO + CaO)/Na is more preferable 2 O is 1.2 to 2.5; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 0.6 to 2.0, preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 0.7 to 1.7, more preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 0.8 to 1.5, and (Na) is more preferable 2 O+Nb 2 O 5 )/SiO 2 The content of RO is 1.0 to 1.5, and the total content of MgO, caO, srO and BaO is described.
6. An optical glass according to any one of claims 1 to 4, characterised in that its components, expressed in weight percentage, are: b is 2 O 3 /SiO 2 Is 0.3 or less, preferably B 2 O 3 /SiO 2 Is 0.25 or less, more preferably B 2 O 3 /SiO 2 Is 0.2 or less, and B is more preferably B 2 O 3 /SiO 2 0.01 to 0.15; and/or B 2 O 3 A ratio of/BaO of 1.4 or less, preferably B 2 O 3 A value of/BaO of 1.0 or less, and B is more preferably 2 O 3 A value of/BaO of 0.8 or less, and further preferably B 2 O 3 The ratio of/BaO is 0.1-0.5; and/or (ZrO) 2 + ZnO)/BaO is 0.05 to 1.5, preferably (ZrO) 2 + ZnO)/BaO is 0.1 to 1.0, more preferably (ZrO) 2 + ZnO)/BaO is 0.15 to 0.8, and (ZrO) is more preferable 2 + ZnO)/BaO is 0.2-0.6; and/or (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.5 or less, preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.3 or moreBelow, more preferably (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.2 or less, and (B) is more preferable 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) 0.01 to 0.15.
7. 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 :28 to 40%, preferably SiO 2 :30 to 37 percent; and/or B 2 O 3 :0 to 6%, preferably B 2 O 3 :0.5 to 5 percent; and/or Nb 2 O 5 :25 to 35%, preferably Nb 2 O 5 :27 to 33 percent; and/or ZrO 2 :1 to 10%, preferably ZrO 2 :2 to 8 percent; and/or RO:11 to 30%, preferably RO:13 to 25 percent; and/or Na 2 O:5 to 15%, preferably Na 2 O:7 to 13 percent; and/or Li 2 O:0 to 3%, preferably Li 2 O:0 to 2 percent; and/or K 2 O:0 to 5%, preferably K 2 O:0 to 3 percent; and/or WO 3 :0 to 3%, preferably WO 3 :0 to 1 percent; and/or Ta 2 O 5 :0 to 3%, preferably Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :0 to 3%, preferably TiO 2 :0 to 1 percent; and/or ZnO:0 to 4%, preferably ZnO:0 to 1 percent; and/or Ln 2 O 3 :0 to 3%, preferably Ln 2 O 3 :0 to 1 percent; and/or Al 2 O 3 :0 to 3%, preferably Al 2 O 3 :0 to 1 percent; and/or a clarifying agent: 0 to 0.8%, preferably a clarifying agent: 0 to 0.5 percent, the RO is the total content of MgO, caO, srO and BaO, ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of Sb as clarifying agent 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: baO:6 to 20%, preferably BaO:8 to 18%, more preferably BaO:10 to 16 percent; and/or MgO:0 to 6%, preferably MgO:0 to 3%, more preferably MgO:0 to 1 percent; and/or CaO:0 to 10%, preferably CaO:0.5 to 8%, more preferably CaO:1 to 6 percent; and/or SrO:0 to 6%, preferably SrO:0 to 3%, more preferably SrO:0 to 1 percent.
9. An optical glass according to any of claims 1 to 4, characterised in that it does not contain TiO in its composition 2 (ii) a And/or does not contain WO 3 (ii) a And/or does not contain Ta 2 O 5 (ii) a And/or no ZnO; and/or does not contain Ln 2 O 3 (ii) a And/or do not contain Li 2 O; and/or does not contain Al 2 O 3 Said Ln 2 O 3 Is La 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of (a).
10. The optical glass according to any one of claims 1 to 4, wherein the refractive index n of the optical glass d 1.68 to 1.76, preferably 1.69 to 1.75, more preferably 1.70 to 1.74, still more preferably 1.71 to 1.74, and/or Abbe number v d Is 30 to 39, preferably 31 to 38, more preferably 32 to 37, and still more preferably 34 to 37.
11. An optical glass according to any one of claims 1 to 4, wherein the relative partial dispersion P of the optical glass g,F 0.7500 or less, preferably 0.7000 or less, more preferably 0.6500 or less, and further preferably 0.6000 or less, and/or a relative partial dispersion deviation value Δ P g,F Is less than 0, preferably-0.0001 or less, more preferably-0.0005 or less, and further preferably-0.0010 or less.
12. The optical glass according to any one of claims 1 to 4, whereinThe density rho of the optical glass is 3.8g/cm 3 Hereinafter, it is preferably 3.7g/cm 3 Hereinafter, more preferably 3.6g/cm 3 The following; and/or coefficient of thermal expansion alpha -30/70℃ Is 95X 10 -7 Preferably 90X 10 or less,/K -7 A value of not more than 85X 10 -7 below/K; and/or lambda 80 Less than or equal to 400nm, preferably lambda 80 Less than or equal to 390nm, more preferably lambda 80 Less than or equal to 385nm; and/or lambda 5 Less than or equal to 350nm, preferably lambda 5 Less than or equal to 340nm, more preferably lambda 5 Less than or equal to 335nm; and/or the weather resistance CR is of class 2 or more, preferably of class 1; and/or stability against acid action D A Is 2 or more, preferably 1; and/or stability against water action D W Is 2 or more, preferably 1; and/or Knoop hardness H K Is 500X 10 7 Pa or more, preferably 510X 10 7 Pa or more, more preferably 520X 10 7 Pa is above; and/or degree of wear F A 180 to 220, preferably 185 to 215, more preferably 190 to 210; and/or a Young's modulus E of 8000X 10 7 ～11000×10 7 Pa, preferably 8500X 10 7 ～10500×10 7 Pa, more preferably 9000X 10 7 ～10000×10 7 Pa。
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 produced from the optical glass according to any one of claims 1 to 12 or the glass preform according to 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 (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101058475A (en) * 2006-03-22 2007-10-24 Hoya株式会社 Optical glass, optical element and method of manufacturing thereof
JP2008001551A (en) * 2006-06-21 2008-01-10 Hoya Corp Optical glass, glass molding, optical element and their fabrication processes
JP2013028532A (en) * 2012-10-22 2013-02-07 Ohara Inc Optical glass
CN103043899A (en) * 2013-01-11 2013-04-17 湖北新华光信息材料有限公司 Optical glass
CN104129918A (en) * 2013-04-30 2014-11-05 株式会社小原 Optical glass, preform, and optical element
JP2015027944A (en) * 2014-09-01 2015-02-12 日本電気硝子株式会社 Optical glass
JP2016088758A (en) * 2014-10-29 2016-05-23 株式会社オハラ Optical glass, preform and optical element
JP2016222511A (en) * 2015-06-02 2016-12-28 光ガラス株式会社 Optical glass, optical element prepared with optical glass, and optical device
JP2018090473A (en) * 2016-12-01 2018-06-14 株式会社オハラ Optical glass, preform, and optical element
JP2019137571A (en) * 2018-02-08 2019-08-22 株式会社オハラ Optical glass, preform, and optical element
CN112125511A (en) * 2020-09-28 2020-12-25 成都光明光电股份有限公司 Optical glass
CN113264675A (en) * 2021-06-24 2021-08-17 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN113292242A (en) * 2021-06-24 2021-08-24 成都光明光电股份有限公司 Special dispersion optical glass

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101058475A (en) * 2006-03-22 2007-10-24 Hoya株式会社 Optical glass, optical element and method of manufacturing thereof
JP2008001551A (en) * 2006-06-21 2008-01-10 Hoya Corp Optical glass, glass molding, optical element and their fabrication processes
JP2013028532A (en) * 2012-10-22 2013-02-07 Ohara Inc Optical glass
CN103043899A (en) * 2013-01-11 2013-04-17 湖北新华光信息材料有限公司 Optical glass
CN104129918A (en) * 2013-04-30 2014-11-05 株式会社小原 Optical glass, preform, and optical element
JP2015027944A (en) * 2014-09-01 2015-02-12 日本電気硝子株式会社 Optical glass
JP2016088758A (en) * 2014-10-29 2016-05-23 株式会社オハラ Optical glass, preform and optical element
TW201620847A (en) * 2014-10-29 2016-06-16 Ohara Kk Optical glass, preform and optical element
JP2016222511A (en) * 2015-06-02 2016-12-28 光ガラス株式会社 Optical glass, optical element prepared with optical glass, and optical device
JP2018090473A (en) * 2016-12-01 2018-06-14 株式会社オハラ Optical glass, preform, and optical element
JP2019137571A (en) * 2018-02-08 2019-08-22 株式会社オハラ Optical glass, preform, and optical element
CN112125511A (en) * 2020-09-28 2020-12-25 成都光明光电股份有限公司 Optical glass
CN113264675A (en) * 2021-06-24 2021-08-17 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN113292242A (en) * 2021-06-24 2021-08-24 成都光明光电股份有限公司 Special dispersion optical glass

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