CN115466049B - Optical glass - Google Patents

Optical glass Download PDF

Info

Publication number
CN115466049B
CN115466049B CN202211272941.1A CN202211272941A CN115466049B CN 115466049 B CN115466049 B CN 115466049B CN 202211272941 A CN202211272941 A CN 202211272941A CN 115466049 B CN115466049 B CN 115466049B
Authority
CN
China
Prior art keywords
optical glass
bao
percent
sio
less
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202211272941.1A
Other languages
Chinese (zh)
Other versions
CN115466049A (en
Inventor
孙伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CDGM Glass Co Ltd
Original Assignee
CDGM Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CDGM Glass Co Ltd filed Critical CDGM Glass Co Ltd
Priority to CN202211272941.1A priority Critical patent/CN115466049B/en
Publication of CN115466049A publication Critical patent/CN115466049A/en
Application granted granted Critical
Publication of CN115466049B publication Critical patent/CN115466049B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • 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

Landscapes

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

Abstract

The invention provides optical glass, which comprises the following components in percentage by weight: siO (SiO) 2 ：26～42％；Nb 2 O 5 ：21～40％；ZrO 2 ：0.5～12％；RO：7～35％；Na 2 O: 3-18%, wherein RO/Nb 2 O 5 0.2 to 1.5, wherein the RO is a total content of MgO, caO, srO, 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 more particularly, to an optical glass having a low density and excellent light transmittance.
Background
In recent years, with rapid development of digitization and high precision of optical systems, in image capturing apparatuses such as digital cameras and video cameras, and in optical apparatuses such as image playback (projection) apparatuses such as projectors and projection televisions, there has been an increasing demand for weight reduction and downsizing of the optical systems as a whole, and it is advantageous to realize weight reduction of the optical systems by using optical glasses having a lower density in the optical systems. Related patent documents for studying low-density optical glass are disclosed in the prior art, and for example, CN108689595A discloses a low-density optical glass having a refractive index of 1.67 to 1.77 and an Abbe number of 26 to 33, but having a low transmittance, which is disclosed as [ lambda ] in examples 80 Most preferably 421nm lambda 70 Most preferably 399nm lambda 5 And most preferably 360nm. Poor light transmittance can affect the imaging effect of the optical system, thereby limiting the application of the optical glass. Therefore, development of an optical glass with lower density and excellent light transmittance has important significance for development of the photoelectric field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the optical glass with lower density and excellent light transmittance.
The technical scheme adopted for solving the technical problems is as follows:
(1) The optical glass comprises the following components in percentage by weight: siO (SiO) 2 ：26～42％；Nb 2 O 5 ：21～40％；ZrO 2 ：0.5～12％；RO：7～35％；Na 2 O: 3-18%, wherein RO/Nb 2 O 5 0.2 to 1.5, wherein the RO is a total content of MgO, caO, srO, baO.
(2) The optical glass according to (1), which comprises the following components in percentage by weight: b (B) 2 O 3 : 0-10%; and/or Li 2 O: 0-5%; and/or K 2 O: 0-8%; and/or WO 3 : 0-5%; and/or Ta 2 O 5 : 0-5%; and/or TiO 2 : 0-5%; and/or ZnO: 0-8%; and/or Ln 2 O 3 : 0-5%; and/or Al 2 O 3 : 0-5%; and/or clarifying agent: 0 to 1 percent of Ln, the Ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
(3) Optical glass containing SiO 2 、Nb 2 O 5 、ZrO 2 、Na 2 O as an essential component, and 7 to 35% by weight of RO, wherein RO/Nb 2 O 5 From 0.2 to 1.5, wherein RO is a total content of MgO, caO, srO, baO, and the refractive index n of the optical glass d Is 1.68 to 1.76, abbe number v d 30-39, density ρ of 3.8g/cm 3 Hereinafter, lambda is 80 Less than or equal to 400nm lambda 5 Less than or equal to 350nm.
(4) The optical glass according to (3), wherein the composition comprises, in weight percent: siO (SiO) 2 : 26-42%; and/or Nb 2 O 5 : 21-40%; and/or ZrO 2 : 0.5-12%; and/or Na 2 O: 3-18%; and/or B 2 O 3 : 0-10%; and/or Li 2 O: 0-5%; and/or K 2 O: 0-8%; and/or WO 3 : 0-5%; and/or Ta 2 O 5 : 0-5%; and/or TiO 2 : 0-5%; and/or ZnO: 0-8%; and/or Ln 2 O 3 : 0-5%; and/or Al 2 O 3 : 0-5%; and/or clarifying agent: 0 to 1 percent of Ln, the Ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
(5) The optical glass according to any one of (1) to (4), wherein the components are represented by weight percent: RO/Nb 2 O 5 Is 0.3 to 1.2, preferably RO/Nb 2 O 5 Is 0.4 to 1.0, more preferably RO/Nb 2 O 5 0.4 to 0.8; and/or RO/SiO 2 From 0.2 to 1.2, preferably RO/SiO 2 From 0.25 to 1.0, more preferably RO/SiO 2 From 0.3 to 0.8, RO/SiO being more preferred 2 0.4 to 0.7; and/or (SiO) 2 +Nb 2 O 5 ) BaO is 2.5 to 10.0, preferably (SiO) 2 +Nb 2 O 5 ) BaO is 3.0 to 8.0, more preferably (SiO) 2 +Nb 2 O 5 ) BaO is 3.5 to 7.0, and further preferably (SiO) 2 +Nb 2 O 5 ) 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, more preferably (BaO+CaO)/Na 2 O is 1.0 to 3.0, more preferably (BaO+CaO)/Na 2 O is 1.2-2.5; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 Is 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, more preferably (Na) 2 O+Nb 2 O 5 )/SiO 2 1.0 to 1.5, and the RO is a total content of MgO, caO, srO, baO.
(6) The optical glass according to any one of (1) to (4), wherein the components are represented by weight percent: b (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, more preferably B 2 O 3 /SiO 2 0.01 to 0.15; and/or B 2 O 3 BaO is 1.4 or less, preferably B 2 O 3 BaO is 1.0 or less, more preferably B 2 O 3 BaO is 0.8 or less, and further preferably B 2 O 3 BaO is 0.1-0.5; and/or (ZrO) 2 +ZnO)/BaO of 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, more preferably (ZrO 2 +ZnO)/BaO is 0.2 to 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), wherein the components are represented by weight percent: siO (SiO) 2 :28 to 40%, preferably SiO 2 : 30-37%; 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 : 27-33%; and/or ZrO 2 :1 to 10%, preferably ZrO 2 : 2-8%; and/or RO: 11-30%, preferably RO: 13-25%; and/or Na 2 O:5 to 15%, preferably Na 2 O: 7-13%; 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 clarifying agent: 0 to 0.8%, preferably a clarifying agent: 0 to 0.5%, wherein RO is a total content of MgO, caO, srO, baO, ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
(8) The optical glass according to any one of (1) to (4), wherein the components are represented by weight percent: baO: 6-20%, preferably BaO: 8-18%, more preferably BaO: 10-16%; 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 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain WO 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain Ta 2 O 5 The method comprises the steps of carrying out a first treatment on the surface of the And/or contain no ZnO; and/or does not contain Ln 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain Li 2 O; and/or does not contain Al 2 O 3 The Ln is 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the following.
(10) The refractive index n of the optical glass according to any one of (1) to (4) d From 1.68 to 1.76, preferably from 1.69 to 1.75, more preferably from 1.70 to 1.74, still more preferably from 1.71 to 1.74, and/or Abbe number v d 30 to 39, preferably 31 to 38, more preferably 32 to 37, and even more preferably 34 to 37.
(11) The relative partial dispersion P of an optical glass according to any one of (1) to (4) g,F 0.7500, preferably 0.7000 or less, more preferably 0.6500 or less, more preferably 0.6000 or less, and/or a relative partial dispersion deviation value ΔP g,F It is preferably less than 0, more preferably less than-0.0001, still more preferably less than-0.0005, and still more preferably less than-0.0010.
(12) The optical glass according to any one of (1) to (4), which has a density ρ of 3.8g/cm 3 Hereinafter, it is preferably 3.7g/cm 3 Hereinafter, it is more preferably 3.6g/cm 3 The following are set forth; and/or coefficient of thermal expansion alpha -30/70℃ 95X 10 -7 Preferably 90X 10, and K is less than or equal to -7 Preferably not more than/K, more preferably 85X 10 -7 and/K or below; 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 weather resistance CR is 2 or more, preferably 1; and/or acid action resistance stability D A More than 2 types, preferably 1 type; and/or stability against water action D W More than 2 types, preferably 1 type; and/or knoop hardness H K 500X 10 7 Pa or more, preferably 510×10 7 Pa or more, more preferably 520×10 7 Pa or more; and/or abrasion degree F A 180 to 220, preferably 185 to 215, more preferably 190 to 210; and/or Young's modulus E of 8000X 10 7 ～11000×10 7 Pa, preferably 8500×10 7 ～10500×10 7 Pa, more preferably 9000×10 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 made of the optical glass according to any one of (1) to (12) or made of the glass preform according to (13).
(15) An optical instrument comprising the optical glass according to any one of (1) to (12) and/or the optical element according to (14).
The beneficial effects of the invention are as follows: 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 embodiments of the optical glass of the present invention will be described in detail below, but the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the object of the present invention. In the repeated explanation, the optical glass of the present invention is sometimes referred to simply as glass in the following description, although the explanation is omitted appropriately, and the gist of the present invention is not limited thereto.
[ optical glass ]
The ranges of the respective components (ingredients) of the optical glass of the present invention are described below. In the present invention, unless otherwise specified, the content and the total content of each component are all expressed in weight percent (wt%), that is, the content and the total content of each component are expressed in weight percent with respect to the total amount of the glass substance converted into the composition of oxide. The term "composition converted into oxide" as used herein means that the total amount of oxide used as a raw material of the optical glass composition of the present invention is 100% when the oxide, the composite salt, the hydroxide, and the like are melted and decomposed and converted into oxide.
Unless otherwise indicated in a particular context, the numerical ranges set forth herein include upper and lower limits, and "above" and "below" include the endpoints, and all integers and fractions within the range, and are not limited to the specific values set forth in the defined range. The term "and/or" as used herein is inclusive, e.g. "a and/or B", meaning either a alone, B alone, or both a and B.
< essential Components and optional Components >
SiO 2 Is an essential component of the optical glass, is a framework of the optical glass, can improve the acid resistance and the viscosity of the glass and reduce the abrasion degree of the glass, and contains more than 26 percent of SiO 2 To obtain the above effect, it is preferable to contain 28% or more of SiO 2 More preferably, the SiO content is 30% or more 2 . On the other hand, if SiO 2 If the content is too large, the glass will have melting propertiesThe glass becomes poor, the viscosity at high temperature increases, and inclusions such as bubbles and stones are likely to occur in the glass. Thus, siO in the present invention 2 The upper limit of the content of (2) is 42%, preferably 40%, more preferably 37%.
B 2 O 3 Has the effect of improving the thermal stability and meltability of the glass, but when the content thereof is more than 10%, the chemical stability, weather resistance and devitrification resistance of the glass are reduced. Thus, in the present invention B 2 O 3 The content of (2) is 0 to 10%, preferably 0 to 6%, more preferably 0.5 to 5%.
In some embodiments, B 2 O 3 Content of (2) and SiO 2 Ratio B between the contents of (2) 2 O 3 /SiO 2 The glass is controlled below 0.3, which is beneficial to improving the weather resistance and Young's 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, more 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, more preferably B 2 O 3 /SiO 2 0.01 to 0.15.
ZrO 2 Can improve the refractive index of the glass, improve the chemical stability of the glass, regulate the shortwave 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 increases, and inclusions appear in the glass and the light transmittance decreases. Thus, zrO 2 The content of (2) is 0.5 to 12%, preferably 1 to 10%, more preferably 2 to 8%.
In some embodiments, the alkaline earth oxide RO (RO is the total content of MgO, caO, srO, baO) is controlled to be in the range of 7 to 35%, the glass is easier to obtain a desired optical constant, and the chemical stability and abrasion of the glass are optimized. Therefore, the RO is preferably 7 to 35%, more preferably 11 to 30%, and even more preferably 13 to 25%.
In some embodiments, the RO content is compared to SiO 2 Ratio RO/SiO between the contents of (C) 2 The hardness of the glass can be improved by controlling the glass within the range of 0.2 to 1.2And prevents deterioration of chemical stability of the glass. Therefore, RO/SiO is preferred 2 From 0.2 to 1.2, more preferably RO/SiO 2 0.25 to 1.0. Further, control 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 From 0.3 to 0.8, more preferably RO/SiO 2 0.4 to 0.7.
MgO can reduce the relative partial dispersion of the glass, but when the MgO content is too high, the refractive index of the glass is difficult to meet the design requirement, and the crystallization resistance and the stability of the glass are reduced. Accordingly, the MgO content is limited to 0 to 6%, preferably 0 to 3%, more preferably 0 to 1%. In some embodiments, it is further preferred that MgO is not contained.
The CaO can adjust the optical constant of the glass, improve the chemical stability of the glass, improve the processing performance of the glass, reduce the high-temperature viscosity and the surface tension of the glass, reduce the production difficulty of the glass, and reduce the devitrification resistance of the glass if the content of the CaO is too high. Therefore, the CaO content is 0 to 10%, preferably 0.5 to 8%, more preferably 1 to 6%.
SrO can adjust the refractive index and abbe number of the glass, but if the content is too large, the chemical stability of the glass is lowered, and the cost of the glass is also rapidly increased. Therefore, the content of SrO is limited to 0 to 6%, preferably 0 to 3%, more preferably 0 to 1%. In some embodiments, it is further preferred that SrO is absent.
BaO can improve the refractive index, the meltability and the thermal stability of the glass, improve the abrasion degree and the light transmittance of the glass, and if the content is too high, the density of the glass is increased and the devitrification resistance is reduced. Therefore, the BaO content is 6 to 20%, preferably 8 to 18%, more preferably 10 to 16%.
In some embodiments, B 2 O 3 Ratio B between the content of BaO and the content of BaO 2 O 3 BaO is controlled to 1.4 or less, which can improve the chemical stability and Young's modulus of the glass and prevent the hardness of the glass from deteriorating. Therefore, B is preferred 2 O 3 BaO is 1.4 or less, more preferably B 2 O 3 BaO is 1.0 or less, and furtherPreferably B 2 O 3 BaO is 0.8 or less, and B is more preferable 2 O 3 BaO is 0.1 to 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, reduces the thermal expansion coefficient of the glass and does not obviously improve P g,F Value sum delta P g,F Value of Nb 2 O 5 The content of (2) is too large, the thermal stability and weather resistance of the glass are reduced, and the light transmittance is reduced. Thus, nb 2 O 5 The content of (2) is in the range of 21 to 40%, preferably 25 to 35%, more preferably 27 to 33%.
In some embodiments, the RO content is compared with Nb 2 O 5 Ratio RO/Nb between the contents of (C) 2 O 5 The light transmittance of the glass can be improved while the density of the glass is reduced by controlling the glass within the range of 0.2-1.5. Therefore, RO/Nb is preferable 2 O 5 Is 0.2 to 1.5, more preferably RO/Nb 2 O 5 0.3 to 1.2. Further, control 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 From 0.4 to 1.0, RO/Nb is more preferable 2 O 5 0.4 to 0.8.
In some embodiments, siO 2 And Nb (Nb) 2 O 5 Is the total content of SiO 2 +Nb 2 O 5 Ratio to BaO content (SiO 2 +Nb 2 O 5 ) BaO is controlled within 2.5-10.0, which can make the glass have lower P g,F Value sum delta P g,F While reducing the coefficient of thermal expansion of the glass. Therefore, it is preferable that (SiO 2 +Nb 2 O 5 ) BaO is 2.5 to 10.0, more preferably (SiO) 2 +Nb 2 O 5 ) BaO is 3.0-8.0. Further, control (SiO 2 +Nb 2 O 5 ) BaO is in the range of 3.5 to 7.0, and the abrasion degree and weather resistance of the glass can be further optimized. Therefore, it is more preferable that (SiO 2 +Nb 2 O 5 ) BaO is 3.5 to 7.0, and more preferably (SiO) 2 +Nb 2 O 5 ) BaO is 4.0-6.0.
Li 2 O can lower the glass transition temperature, adjust the high temperature viscosity of the glass, improve the meltability of the glass, but is unfavorable for the glass melting stability and the cost economy when the content is high. 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 that Li is not contained 2 O。
Na 2 O has the function of improving the glass melting property, can improve the melting effect of the glass, and simultaneously is helpful for reducing the P of the glass g,F Value sum delta P g,F The value of the composition is that the composition contains more than 3% of Na 2 O to obtain the above-described effects. If Na is 2 O content exceeds 18%, and chemical stability and weather resistance of the glass are lowered, so Na 2 The content of O is 3-18%, preferably Na 2 The content of O is 5 to 15%, more preferably Na 2 The content of O is 7-13%.
In some embodiments, na 2 O and Nb 2 O 5 Is the total content Na of 2 O+Nb 2 O 5 With SiO 2 Ratio between the contents of (Na) 2 O+Nb 2 O 5 )/SiO 2 The control of the glass within the range of 0.6 to 2.0 can lead the glass to have lower P g,F Value sum delta P g,F While optimizing the value, the abrasion of the glass. Therefore, it is preferable that (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 0.7 to 1.7. Further, control (Na 2 O+Nb 2 O 5 )/SiO 2 In the range of 0.8-1.5, the weather resistance of the glass can be further improved, and the density of the glass is prevented from being increased. Therefore, it is more preferable that (Na 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 1.0 to 1.5.
In some embodiments, the combined content of BaO and CaO, bao+cao, and Na 2 Ratio between the O contents (BaO+CaO)/(CaO)Na 2 O is controlled within the range of 0.5-5.0, so that the glass has lower P g,F Value sum delta P g,F The chemical stability of the glass is improved and the density of the glass is prevented from rising. Therefore, (BaO+CaO)/Na is preferable 2 O is 0.5 to 5.0, more preferably (BaO+CaO)/Na 2 O is 0.8-4.0. Further, control of (BaO+CaO)/Na 2 O is in the range of 1.0-3.0, and the Young's modulus and weather resistance of the glass can be further optimized. Therefore, (BaO+CaO)/Na is more preferable 2 O is 1.0 to 3.0, more preferably (BaO+CaO)/Na 2 O is 1.2-2.5.
K 2 O has an effect of improving the thermal stability and meltability of the glass, but if its content exceeds 8%, the devitrification resistance and chemical stability of the glass are deteriorated. Thus, in the present invention K 2 O content 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 The content of (2) exceeds 5%, the thermal stability of the glass decreases, and the devitrification resistance decreases. Thus, WO 3 The upper limit of the content of (2) is 5%, preferably 3%, more preferably 1%. In some embodiments, it is further preferred that WO is not included 3 。
Ta 2 O 5 The glass has the effects of improving the refractive index and improving the devitrification resistance of the glass, but the content is too high, the thermal stability of the glass is reduced, the density is increased, and the optical constant is difficult to control to a desired range; on the other hand, ta compared with other components 2 O 5 Is very expensive, and the amount of the catalyst to be used should be reduced as much as possible from the practical and cost viewpoints. Thus, ta in the present invention 2 O 5 The content of (2) is limited to 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%, and even more preferably not containing Ta 2 O 5 。
TiO 2 The glass has the functions of improving the refractive index and dispersion of the glass, and the proper amount of the glass can be more stable and reduce the viscosity of the glass. If TiO 2 The content of (2) exceeds 5%, the crystallization tendency of the glass increases, the transition temperature increases, and the P of the glass g,F Value sum delta P g,F The value becomes large. Thus, in the present invention, tiO 2 The content of (2) is 5% or less, preferably 3% or less, more preferably 1% or less, and even more preferably no TiO is contained 2 。
In some embodiments, B 2 O 3 、Li 2 O、TiO 2 Total content B of (2) 2 O 3 +Li 2 O+TiO 2 With BaO and Nb 2 O 5 In total BaO+Nb 2 O 5 Ratio between (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) The chemical stability of the glass can be improved and the decrease of the light transmittance of the glass can be prevented by controlling the glass content to be less than 0.5. Therefore, (B) is preferable 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, control (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 may 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 ) 0.01 to 0.15.
ZnO can adjust the refractive index and dispersion of the glass, reduce the high-temperature viscosity and the 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 molding difficulty of the glass is increased, the crystallization resistance is poor, and the glass is not favorable for obtaining negative anomalous dispersion. Accordingly, 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 ZnO is absent.
In some embodiments, zrO 2 And ZnO in total content of ZrO 2 The ratio between +ZnO and BaO content (ZrO 2 The +ZnO)/BaO is controlled within the range of 0.05 to 1.5, so that the glass can be madeGlass has lower P g,F Value sum delta P g,F The Young's modulus of the glass is prevented from deteriorating while the value is obtained. Therefore, (ZrO 2 +ZnO)/BaO of 0.05 to 1.5, more preferably (ZrO 2 +ZnO)/BaO is 0.1 to 1.0. Further, control (ZrO 2 The +ZnO)/BaO is in the range of 0.15 to 0.8, and can further reduce the thermal expansion coefficient of the glass and improve the hardness of the glass. Therefore, it is more preferable that (ZrO 2 +ZnO)/BaO is 0.15 to 0.8, more preferably (ZrO 2 +ZnO)/BaO is 0.2 to 0.6.
Ln 2 O 3 (Ln 2 O 3 Is La (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) is a component for improving refractive index and chemical stability of glass by mixing Ln 2 O 3 The content of (2) is controlled to 5% or less, and the glass can be prevented from decreasing in devitrification resistance, preferably Ln 2 O 3 The upper limit of the content range of (2) is 3%, and more preferably the upper limit is 1%. In some embodiments, it is further preferred that Ln is not present 2 O 3 。
Al 2 O 3 The chemical stability of the glass can be improved, but when the content exceeds 5%, the melting property and light transmittance of the glass become poor. Thus, al in the present invention 2 O 3 The content of (2) is 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%. In some embodiments, it is further preferred that Al is absent 2 O 3 。
In the invention, 0 to 1 percent of Sb is contained 2 O 3 、SnO、SnO 2 、CeO 2 The one or more components in the glass are used as a clarifying agent, so that the clarifying effect of the glass can be improved, the bubble degree of the glass is improved, the content of the clarifying agent is preferably 0-0.8%, and the content of the clarifying agent is more preferably 0-0.5%. When Sb is 2 O 3 If the content exceeds 1%, the glass tends to be degraded in fining property, and the strong oxidation promotes corrosion of platinum or platinum alloy vessels for melting the glass and deterioration of molding dies, so that Sb is preferable in the present invention 2 O 3 The content of (2) is 0-1%More preferably 0 to 0.8%, still more preferably 0 to 0.5%. SnO and SnO 2 When the content exceeds 1%, the glass tends to be colored, or when the glass is heated, softened, and subjected to press molding or the like to be reformed, sn becomes a starting point of nucleation and devitrification tends to occur. Thus SnO of the present invention 2 The content of (2) is preferably 0 to 1%, more preferably 0 to 0.8%, still more preferably 0 to 0.5%; the content of SnO is preferably 0 to 1%, more preferably 0 to 0.8%, and still more preferably 0 to 0.5%. CeO (CeO) 2 Action and content ratio of (2) and SnO 2 The content thereof is preferably 0 to 1%, more preferably 0 to 0.8%, even more preferably 0 to 0.5%, and even more preferably no CeO is contained 2 。
< component not to be contained >
In the glass of the present invention, V, cr, mn, fe, co, ni, cu, ag and oxides of transition metals such as Mo are colored even when they are contained in small amounts, either alone or in combination, and absorb at a specific wavelength in the visible light range, so that the property of the present invention of improving the visible light transmittance effect is impaired, and therefore, in particular, an optical glass having a wavelength transmittance in the visible light range is preferably practically not contained.
Th, cd, tl, os, be and Se oxides have a tendency to be used in a controlled manner as harmful chemical substances in recent years, and are required to provide environmental protection not only in the glass manufacturing process but also in the processing steps and disposal after production. Therefore, in the case where the influence on the environment is emphasized, it is preferable that they are not substantially contained except for unavoidable mixing. As a result, the optical glass becomes practically free from environmental pollutants. Therefore, the optical glass of the present invention can be manufactured, processed, and discarded without taking special measures against the environment.
In order to achieve environmental friendliness, the optical glass of the present invention preferably does not contain As 2 O 3 And PbO.
The term "not containing" or "0%" as used herein means that the compound, molecule, element or the like is not intentionally added as a raw material to the optical glass of the present invention; however, it is also within the scope of the present invention that certain impurities or components may be present as raw materials and/or equipment for producing optical glass that are not intentionally added, and that may be present in small or trace amounts in the final optical glass.
The performance of the optical glass of the present invention will be described below.
< refractive index and Abbe number >
Refractive index (n) d ) With Abbe number (v) d ) Tested according to the method specified in GB/T7962.1-2010.
In some embodiments, the refractive index (n d ) The lower limit of (2) is 1.68, preferably 1.69, more preferably 1.70, and even more preferably 1.71. In some embodiments, the refractive index (n d ) The upper limit of (2) is 1.76, preferably 1.75, more preferably 1.74.
In some embodiments, the Abbe number (. Nu.) of the optical glass of the present invention d ) The lower limit of (2) is preferably 30, more preferably 31, still more preferably 32, still more preferably 33, and still more preferably 34. In some embodiments, the Abbe number (. Nu.) 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 prescribed in GB/T7962.20-2010.
In some embodiments, the optical glass of the present invention has a density (ρ) of 3.8g/cm 3 Hereinafter, it is preferably 3.7g/cm 3 Hereinafter, it is more preferably 3.6g/cm 3 The following is given.
< coefficient of thermal expansion >
Coefficient of thermal expansion (. Alpha.) of optical glass -30/70℃ ) Data at-30 to 70℃were tested according to the procedure prescribed in GB/T7962.16-2010.
In some embodiments, the optical glass of the present invention has a coefficient of thermal expansion (α -30/70℃ ) 95X 10 -7 Preferably 90X 10, and K is less than or equal to -7 Preferably not more than/K, more preferably 85X 10 -7 and/K or below.
< coloring degree >
The glass of the present invention has a coloring degree (lambda) for short-wave transmission spectrum characteristics 80 And lambda (lambda) 5 ) And (3) representing. Lambda (lambda) 80 Refers to the wavelength corresponding to the glass transmittance reaching 80%. Lambda (lambda) 80 Is to measure spectral transmittance in a wavelength range from 280nm to 700nm and to exhibit a wavelength of 80% transmittance using glass having a thickness of 10.+ -. 0.1mm having two opposite planes which are parallel to each other and optically polished. The spectral transmittance or transmittance is the intensity I at right angles to the surface of the glass in Transmits through glass and emits intensity I from a plane out In the case of light passing through I out /I in The indicated amounts, and also the transmittance 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 glass, lambda 80 The small value of (2) means that the glass itself is extremely little colored and the light transmittance is high.
In some embodiments, λ 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, λ of the optical glass of the present invention 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.
< weather resistance >
The weather resistance (CR) test method of the optical glass is as follows: the sample is placed in a test box in a saturated steam environment with the relative humidity of 90 percent, and the sample is alternately circulated at the temperature of 40-50 ℃ for 15 cycles every 1 hour. Weather resistance categories were classified according to the amount of turbidity change before and after sample placement, and weather resistance classification conditions are shown in table 1:
table 1.
In some embodiments, the optical glass of the present invention has a weatherability (CR) of 2 or more, preferably 1.
< Knoop hardness >
Knoop hardness of optical glass (H K ) The test is carried out according to the test method specified in GB/T7962.18-2010.
In some embodiments, the knoop hardness (H K ) 500X 10 7 Pa or more, preferably 510×10 7 Pa or more, more preferably 520×10 7 Pa or more.
< relative partial Dispersion and relative partial Dispersion deviation value >
The relative partial dispersion (P) is described by the following formula g,F ) And relative partial dispersion deviation value (DeltaP) g,F ) Is derived from (a).
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)
according to Abbe's number formula, the following formula (2) is true for most of so-called "normal glasses" (hereinafter H-K6 and F4 are selected as "normal glasses")
P x,y ＝m x,y ·v d +b x,y (2)
The linear relationship is represented by P x,y Is in ordinate, v d Represented by the abscissa, where m x,y Is a slope, b x,y Is the intercept.
It is known that correction of the secondary spectrum, i.e. achromatizing to more than two wavelengths, requires at least one glass which does not correspond to formula (2) above (i.e. P x,y Value deviation from Abbe's empirical formula), which is a deviation from the value ΔP x,y Representation, then each P x,y -v d The point is shifted by ΔP with respect to the "normal line" conforming to the above formula (2) x,y The amount of ΔP of each glass x,y The numerical value can be obtained by the following formula (3):
P x,y ＝m x,y ·v d +b x,y +ΔP x,y (3)
thus DeltaP x,y The deviation characteristic of the special dispersion when compared with "normal glass" is quantitatively expressed.
Thus, the relative partial dispersion (P g,F ) And relative partial dispersion deviation value (DeltaP) g,F ) The calculation formulas of (a) 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 g,F ) 0.7500 is preferably 0.7000 or less, more preferably 0.6500 or less, and even more preferably 0.6000 or less.
In some embodiments, the relative partial dispersion deviation value (Δp of the optical glass of the present invention g,F ) It is preferably less than 0, more preferably less than-0.0001, still more preferably less than-0.0005, and still more preferably less than-0.0010.
< abrasion degree >
Abrasion degree (F) of optical glass A ) The abrasion loss of the sample and the abrasion loss (volume) of the standard sample (H-K9 glass) are multiplied by 100 under the identical conditions, and the values are expressed as follows:
F A ＝V/V 0 ×100＝(W/ρ)/(W 0 /ρ 0 )×100
wherein: v-the volume abrasion of the sample to be measured;
V 0 -standard sample volume attrition;
w is the mass abrasion quantity of the sample to be measured;
W 0 -standard sample mass abrasion;
ρ -the measured sample density;
ρ 0 standard sample density.
In some embodiments, the abrasiveness (F A ) Lower limit of 180, preferably lower limit of 185, more preferably lower limit of 190, abrasion (F A ) The upper limit of (2) is 220, preferably 215, and more preferably 210.
< stability against Water action >
Stability against Water action of optical glass (D W ) (powder method) the test was carried out according to the method prescribed in GB/T17129.
In some embodiments, the water resistance stability (D W ) More than 2 kinds, preferably 1 kind.
< stability against acid action >
Acid action resistance stability of optical glass (D A ) (powder method) the test was carried out according to the method prescribed in GB/T17129.
In some embodiments, the acid action resistance stability (D A ) More than 2 kinds, preferably 1 kind.
< Young's modulus >
Young's modulus (E) is obtained by measuring longitudinal wave velocity and transverse wave velocity by ultrasonic wave and calculating according to the following formula.
G＝V S 2 ρ
Wherein: e is Young's modulus, pa;
g is the shear modulus, pa;
V T is transverse wave speed, m/s;
V S is longitudinal wave speed, m/s;
ρ is the density of the glass, g/cm 3 。
In some embodiments, the Young's modulus (E) of the optical glass of the present invention has a lower limit of 8000X 10 7 Pa, a lower limit of 8500×10 is preferable 7 Pa or more, and more preferably 9000×10 as a lower limit 7 Pa or more.
In some embodiments, the Young's modulus (E) of the optical glass of the present invention has an upper limit of 11000X 10 7 Pa, a preferable upper limit is 10500×10 7 Pa, and more preferably an upper limit of 10000X 10 7 Pa。
[ method for producing optical glass ]
The manufacturing method of the optical glass comprises the following steps: the glass of the invention is produced by adopting conventional raw materials and processes, including but not limited to oxide, hydroxide, compound salt (such as carbonate, nitrate, sulfate and the like), boric acid and the like as raw materials, after being proportioned according to a conventional method, the proportioned furnace burden is put into a smelting furnace (such as a platinum or platinum alloy crucible) with the temperature of 1200-1500 ℃ to be smelted, and after clarification and homogenization, homogeneous molten glass without bubbles and undissolved substances is obtained, and the molten glass is cast in a mould and annealed. Those skilled in the art can appropriately select the raw materials, the process methods, and the process parameters according to actual needs.
[ glass preform and optical element ]
The optical glass thus produced may be used to produce a glass preform by direct drop molding, grinding, or compression molding such as hot press molding. That is, the glass preform may be produced by directly precision drop molding a molten optical glass into a glass precision preform, or by mechanical processing such as grinding and polishing, or by producing a preform for press molding from an optical glass, and then performing hot press molding and polishing on the preform. The means for producing the glass preform is not limited to the above-described means.
As described above, the optical glass of the present invention is useful for various optical elements and optical designs, and among them, it is particularly preferable to form a preform from the optical glass of the present invention, and use the preform for performing hot press molding, precision press molding, and the like to produce optical elements such as lenses and prisms.
The glass preform and the optical element of the present invention are each formed of the optical glass of the present invention described above. The glass preform of the present invention has excellent characteristics possessed by an optical glass; the optical element of the present invention has excellent characteristics of optical glass, and can provide various optical elements such as lenses and prisms having high optical value.
Examples of the lens include various lenses such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens, each of which has a spherical or aspherical lens surface.
[ optical instrument ]
The optical element formed by the optical glass can be used for manufacturing optical instruments such as photographic equipment, image pickup equipment, projection equipment, display equipment, vehicle-mounted equipment, monitoring equipment and the like.
Examples
< example of optical glass >
In order to further clearly illustrate and describe the technical solutions of the present invention, the following non-limiting examples are provided.
In this example, optical glasses having compositions shown in tables 2 to 4 were obtained by using the above-described optical glass manufacturing method. The characteristics of each glass were measured by the test method of the present invention, and the measurement results are shown in tables 2 to 4.
Table 2.
/>
Table 3.
/>
Table 4.
/>
/>
< example of glass preform >
The glasses obtained in examples 1 to 24 were subjected to polishing, re-hot press molding, and press molding such as precision press molding to prepare various kinds of lenses such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses, and preforms such as prisms.
< example of optical element >
The glass preforms obtained in the above examples were annealed, and the refractive index was fine-tuned while reducing the internal stress of the glass so that the optical characteristics such as refractive index reached the desired values.
Next, each preform was ground and polished to produce various lenses and prisms such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens. The surface of the obtained optical element may be coated with an antireflection film.
< example of optical instrument >
The optical elements produced by the above-described optical element embodiments are useful, for example, in imaging devices, sensors, microscopes, medical technology, digital projection, communications, optical communication technology/information transmission, optics/illumination in the automotive field, lithography, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices including such circuits and chips, by optical design, by forming optical components or optical assemblies using one or more optical elements.

Claims (32)

1. The optical glass is characterized by comprising the following components in percentage by weight: siO (SiO) 2 ：26～42％；Nb 2 O 5 ：21～40％；ZrO 2 ：0.5～12％；RO：7～35％；Na 2 O: 3-18%, wherein RO/Nb 2 O 5 0.2 to 1.5, B 2 O 3 BaO is 0.1 to 0.5, (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) The RO is a total content of MgO, caO, srO, baO and is 0.3 or less.
2. The optical glass according to claim 1, wherein the composition, expressed in weight percent, further comprises: b (B) 2 O 3 : 0.5-10%; and/or Li 2 O: 0-5%; and/or K 2 O: 0-8%; and/or WO 3 : 0-5%; and/or Ta 2 O 5 : 0-5%; and/or TiO 2 : 0-5%; and/or ZnO: 0-8%; and/or Ln 2 O 3 : 0-5%; and/or Al 2 O 3 : 0-5%; and/or clarifying agent: 0 to 1 percent of Ln, the Ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
3. An optical glass comprising SiO 2 、Nb 2 O 5 、ZrO 2 、Na 2 O as an essential component, and 7 to 35% by weight of RO, wherein RO/Nb 2 O 5 0.2 to 1.5, B 2 O 3 BaO is 0.1 to 0.5, (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) A total RO of not more than 0.3, a total RO of MgO, caO, srO, baO, and a refractive index n of the optical glass d Is 1.68 to 1.76, abbe number v d 30-39, density ρ of 3.8g/cm 3 Hereinafter, lambda is 80 Less than or equal to 400nm lambda 5 Less than or equal to 350nm.
4. An optical glass according to claim 3, wherein the composition comprises, in weight percent: siO (SiO) 2 : 26-42%; and/or Nb 2 O 5 : 21-40%; and/or ZrO 2 : 0.5-12%; and/or Na 2 O: 3-18%; and/or B 2 O 3 : 0.5-10%; and/or Li 2 O: 0-5%; and/or K 2 O: 0-8%; and/or WO 3 : 0-5%; and/or Ta 2 O 5 : 0-5%; and/or TiO 2 : 0-5%; and/or ZnO: 0-8%; and/or Ln 2 O 3 : 0-5%; and/or Al 2 O 3 : 0-5%; and/or clarifying agent: 0 to 1 percent of Ln, the Ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
5. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: RO/Nb 2 O 5 0.3 to 1.2; and/or RO/SiO 2 0.2 to 1.2; and/or (SiO) 2 +Nb 2 O 5 ) BaO is 2.5-10.0; and/or (BaO+CaO)/Na 2 O is 0.5-5.0; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 The RO is a total content of MgO, caO, srO, baO in an amount of 0.6 to 2.0.
6. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: RO/Nb 2 O 5 0.4 to 1.0; and/or RO/SiO 2 Is 0.25 to 10; and/or (SiO) 2 +Nb 2 O 5 ) BaO is 3.0-8.0; and/or (BaO+CaO)/Na 2 O is 0.8-4.0; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 The RO is a total content of MgO, caO, srO, baO in an amount of 0.7 to 1.7.
7. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: RO/Nb 2 O 5 0.4 to 0.8; and/or RO/SiO 2 0.3 to 0.8; and/or (SiO) 2 +Nb 2 O 5 ) BaO is 3.5-7.0; and/or (BaO+CaO)/Na 2 O is 1.0-3.0; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 0.8 to 1.5, and the RO is MgO, caO, srO, baO.
8. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: RO/SiO 2 0.4 to 0.7; and/or (SiO) 2 +Nb 2 O 5 ) BaO is 4.0-6.0; and/or (BaO+CaO)/Na 2 O is 1.2-2.5; and/or (Na) 2 O+Nb 2 O 5 )/SiO 2 1.0 to 1.5, and the RO is a total content of MgO, caO, srO, baO.
9. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: b (B) 2 O 3 /SiO 2 Is 0.3 or less; and/or (ZrO) 2 +ZnO)/BaO is 0.05 to 1.5; and/or (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) Is 0.2 or less.
10. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: b (B) 2 O 3 /SiO 2 Is 0.25 or less; and/or (ZrO) 2 +ZnO)/BaO is 0.1-1.0; and/or (B) 2 O 3 +Li 2 O+TiO 2 )/(BaO+Nb 2 O 5 ) 0.01 to 0.15.
11. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: b (B) 2 O 3 /SiO 2 Is 0.2 or less; and/or (ZrO) 2 +ZnO)/BaO is 0.15 to 0.8.
12. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: b (B) 2 O 3 /SiO 2 0.01 to 0.15; and/or (ZrO) 2 +ZnO)/BaO is 0.2 to 0.6.
13. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: siO (SiO) 2 : 28-40%; and/or B 2 O 3 :0.5 to 6 percent; and/or Nb 2 O 5 : 25-35%; and/or ZrO 2 :1 to 10 percent; and/or RO: 11-30%; and/or Na 2 O: 5-15%; and/or Li 2 O:0 to 3 percent; and/or K 2 O: 0-5%; and/or WO 3 :0 to 3 percent; and/or Ta 2 O 5 :0 to 3 percent; and/or TiO 2 :0 to 3 percent; and/or ZnO:0 to 4 percent; and/or Ln 2 O 3 :0 to 3 percent; and/or Al 2 O 3 :0 to 3 percent; and/or clarifying agent: 0 to 0.8%, wherein RO is a total content of MgO, caO, srO, baO, ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
14. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: si (Si)O 2 : 30-37%; and/or B 2 O 3 :0.5 to 5 percent; and/or Nb 2 O 5 : 27-33%; and/or ZrO 2 : 2-8%; and/or RO: 13-25%; and/or Na 2 O: 7-13%; and/or Li 2 O:0 to 2 percent; and/or K 2 O:0 to 3 percent; and/or WO 3 :0 to 1 percent; and/or Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :0 to 1 percent; and/or ZnO:0 to 1 percent; and/or Ln 2 O 3 :0 to 1 percent; and/or Al 2 O 3 :0 to 1 percent; and/or clarifying agent: 0 to 0.5%, wherein RO is a total content of MgO, caO, srO, baO, ln 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the clarifying agents is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of the following.
15. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: baO: 6-20%; and/or MgO:0 to 6 percent; and/or CaO: 0-10%; and/or SrO:0 to 6 percent.
16. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: baO: 8-18%; and/or MgO:0 to 3 percent; and/or CaO: 0.5-8%; and/or SrO:0 to 3 percent.
17. The optical glass according to any one of claims 1 to 4, wherein the components thereof are represented by weight percent, wherein: baO: 10-16%; and/or MgO:0 to 1 percent; and/or CaO:1 to 6 percent; and/or SrO:0 to 1 percent.
18. The optical glass according to any one of claims 1 to 4, wherein the component does not contain TiO 2 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain WO 3 The method comprises the steps of carrying out a first treatment on the surface of the And-Or does not contain Ta 2 O 5 The method comprises the steps of carrying out a first treatment on the surface of the And/or contain no ZnO; and/or does not contain Ln 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the And/or does not contain Li 2 O; and/or does not contain Al 2 O 3 The Ln is 2 O 3 Is La (La) 2 O 3 、Gd 2 O 3 、Y 2 O 3 、Yb 2 O 3 、Lu 2 O 3 One or more of the following.
19. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a refractive index n d 1.68 to 1.76; and/or Abbe number v d 30 to 39.
20. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a refractive index n d 1.69 to 1.75; and/or Abbe number v d 31 to 38.
21. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a refractive index n d 1.70 to 1.74; and/or Abbe number v d 32 to 37.
22. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a refractive index n d 1.71 to 1.74; and/or Abbe number v d 34 to 37.
23. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a relative partial dispersion P g,F 0.7500 or less; and/or relative partial dispersion deviation value ΔP g,F Is less than 0.
24. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a relative partial dispersion P g,F Is 0.7000 or less; and/or relative partial dispersion deviation value ΔP g,F Is-0.0001 or less.
25. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a relative partial dispersion P g,F 0.6500 or less; and/or relative partial dispersion deviation value ΔP g,F Is-0.0005 or less.
26. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a relative partial dispersion P g,F Is less than 0.6000; and/or relative partial dispersion deviation value ΔP g,F Is-0.0010 or less.
27. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a density ρ of 3.8g/cm 3 The following are set forth; and/or coefficient of thermal expansion alpha -30/70℃ 95X 10 -7 and/K or below; and/or lambda 80 Less than or equal to 400nm; and/or lambda 5 Less than or equal to 350nm; and/or weather resistance CR is more than 2 kinds; and/or acid action resistance stability D A Is more than 2 types; and/or stability against water action D W Is more than 2 types; and/or knoop hardness H K 500X 10 7 Pa or more; and/or abrasion degree F A 180-220; and/or Young's modulus E of 8000X 10 7 ～11000×10 7 Pa。
28. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a density ρ of 3.7g/cm 3 The following are set forth; and/or coefficient of thermal expansion alpha -30/70℃ 90X 10 -7 and/K or below; and/or lambda 80 Less than or equal to 390nm; and/or lambda 5 Less than or equal to 340nm; and/or weatherability CR is class 1; and/or acid action resistance stability D A Class 1; and/or stability against water action D W Class 1; and/or knoop hardness H K Is 510 multiplied by 10 7 Pa or more; and/or abrasion degree F A 185 to 215; and/or Young's modulus E of 8500×10 7 ～10500×10 7 Pa。
29. The optical glass according to any one of claims 1 to 4, wherein the optical glass has a density ρ of 3.6g/cm 3 The following are set forth; and/or coefficient of thermal expansion alpha -30/70℃ 85X 10 -7 and/K or below; and/or lambda 80 Less than or equal to 385nm; and/or lambda 5 Less than or equal to 335nm; and/or knoop hardness H K Is 520 multiplied by 10 7 Pa or more; and/or abrasion degree F A 190-210; and/or Young's modulus E of 9000×10 7 ～10000×10 7 Pa。
30. A glass preform produced by using the optical glass according to any one of claims 1 to 29.
31. An optical element, characterized in that it is made of the optical glass according to any one of claims 1 to 29 or of the glass preform according to claim 30.
32. An optical instrument comprising the optical glass according to any one of claims 1 to 29 and/or the optical element according to claim 31.
CN202211272941.1A 2022-10-18 2022-10-18 Optical glass Active CN115466049B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211272941.1A CN115466049B (en) 2022-10-18 2022-10-18 Optical glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211272941.1A CN115466049B (en) 2022-10-18 2022-10-18 Optical glass

Publications (2)

Publication Number Publication Date
CN115466049A CN115466049A (en) 2022-12-13
CN115466049B true CN115466049B (en) 2023-08-08

Family

ID=84336534

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211272941.1A Active CN115466049B (en) 2022-10-18 2022-10-18 Optical glass

Country Status (1)

Country Link
CN (1) CN115466049B (en)

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

Also Published As

Publication number Publication date
CN115466049A (en) 2022-12-13

Similar Documents

Publication Publication Date Title
CN113292242B (en) Special dispersion optical glass
CN117756402A (en) Optical glass and optical element
CN109734304B (en) Optical glass, glass preform, optical element and optical instrument
CN115028353B (en) Optical glass with negative anomalous dispersion
CN115504666A (en) Optical glass and optical element
CN115466051A (en) Optical glass, glass preform and optical element
CN115304274A (en) High-refraction high-dispersion optical glass
CN115286238A (en) Optical glass
CN115466049B (en) Optical glass
CN110316958B (en) Optical glass and optical element
CN115448591B (en) Optical glass, optical element and optical instrument
CN111320383A (en) Optical glass, glass preform, optical element and optical instrument
CN114907009B (en) Optical glass and optical element
CN115246707B (en) Optical glass, optical element and optical instrument
CN115231818B (en) Optical glass, glass preform and optical element
CN115028355B (en) Special dispersion optical glass
CN114907011B (en) Optical glass, glass preform, optical element, and optical instrument
CN117658448A (en) Optical glass, glass preform, optical element, and optical instrument
CN113603361B (en) Phosphate optical glass
CN117658447A (en) Optical glass, glass preform, optical element, and optical instrument
CN117658446A (en) High-refraction low-dispersion optical glass
CN117658452A (en) Optical glass, glass preform, optical element, and optical instrument
CN117658445A (en) Optical glass, glass preform, optical element, and optical instrument
CN117658454A (en) Optical glass, glass preform, optical element, and optical instrument
CN117658449A (en) Optical glass, optical element and optical instrument

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant