CN115304269A - Optical glass - Google Patents
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- CN115304269A CN115304269A CN202211031098.8A CN202211031098A CN115304269A CN 115304269 A CN115304269 A CN 115304269A CN 202211031098 A CN202211031098 A CN 202211031098A CN 115304269 A CN115304269 A CN 115304269A
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- 239000005304 optical glass Substances 0.000 title claims abstract description 99
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims abstract description 30
- 239000011521 glass Substances 0.000 claims description 109
- 230000003287 optical effect Effects 0.000 claims description 43
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 14
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 11
- 229910005793 GeO 2 Inorganic materials 0.000 claims description 11
- 239000008395 clarifying agent Substances 0.000 claims description 11
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 10
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 10
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 description 17
- 238000004031 devitrification Methods 0.000 description 16
- 238000005299 abrasion Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- 238000002834 transmittance Methods 0.000 description 14
- 238000000465 moulding Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000005499 meniscus Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910001260 Pt alloy Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006025 fining agent Substances 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/068—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)
- Physics & Mathematics (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)
- 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 ：1～18％；B 2 O 3 ：4～18％；ZrO 2 ：2～15％；Nb 2 O 5 ：2～18％；La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :45 to 75 percent of (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 5.0 or more. Through reasonable component design, the optical glass has higher refractive index and lower density.
Description
Technical Field
The present invention relates to an optical glass, and more particularly to an optical glass having a low density, and a glass preform, an optical element and an optical instrument made of the same.
Background
In recent years, with the rapid progress of digitization and high precision of optical systems, there has been an increasing demand for reducing the number of optical elements such as lenses and prisms used in the optical systems and reducing the weight and size of the entire optical systems in photographic equipment such as digital cameras and video cameras, and optical equipment such as image reproducing (projection) equipment such as projectors and projection televisions. In the design of an optical system, high-refractive-index glass or an aspheric lens is widely adopted to realize miniaturization, ultra-thinning and wide-angle, so that the chromatic aberration can be corrected more easily while the light weight and high performance of the optical system are realized; on the other hand, the use of optical glass having a relatively low density is also advantageous for achieving weight reduction of the optical system. In view of this, the field of optoelectronics has a great demand for high refractive index optical glasses having a lower density.
Disclosure of Invention
The invention aims to provide optical glass with higher refractive index and lower density.
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 ：1～18％；B 2 O 3 ：4～18％；ZrO 2 ：2～15％；Nb 2 O 5 ：2～18％；La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :45 to 75 percent of (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 5.0 or more.
(2) The optical glass according to (1), which comprises the following components in percentage by weight: ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 8 percent; and/or RO:0 to 8 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 8 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0 to 2 percent of RO, rn and one or more of MgO, caO, srO and BaO 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(3) Optical glass comprising SiO as a component 2 、B 2 O 3 、ZrO 2 、Nb 2 O 5 And further contains 45 to 75 weight percent of La 2 O 3 +Y 2 O 3 +Gd 2 O 3 Wherein (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 5.0 or more, and the refractive index n of the optical glass d 1.85 to 1.91, abbe number v d 35 to 43 and a density rho of 5.10g/cm 3 The following.
(4) The optical glass according to (3), which comprises the following components in percentage by weight: siO 2 2 :1 to 18 percent; and/or B 2 O 3 :4 to 18 percent; and/or ZrO 2 :2 to 15 percent; and/or Nb 2 O 5 :2 to 18 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 8 percent; and/or RO:0 to 8 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 8 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0 to 2 percent of RO, rn and one or more of MgO, caO, srO and BaO 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(5) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 6.0 to 20.0, preferably (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 7.0 to 15.0, more preferably (La) 2 O 3 +Y 2 O 3 )/ZrO 2 7.5 to 10.0; and/or Y 2 O 3 /B 2 O 3 0.5 to 5.0, preferably Y 2 O 3 /B 2 O 3 Is 0.6 to 3.0, more preferably Y 2 O 3 /B 2 O 3 Is 0.7 to 2.5, and Y is more preferably 2 O 3 /B 2 O 3 0.8 to 2.0; and/or La 2 O 3 /Nb 2 O 5 2.0 to 20.0, preferably La 2 O 3 /Nb 2 O 5 Is 3.0 to 15.0, more preferably La 2 O 3 /Nb 2 O 5 Is 4.0 to 10.0, more preferably La 2 O 3 /Nb 2 O 5 Is 4.5 to 9.0.
(6) The optical glass according to any one of (1) to (4), which comprises the following components in percentage by weight: gd (Gd) 2 O 3 /(SiO 2 +B 2 O 3 ) Is 1.0 or less, preferably Gd 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.6 or less, more preferably Gd 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.5 or less, and Gd is more preferable 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.3 or less; and/or Ta 2 O 5 /Y 2 O 3 Is 0.8 or less, preferably Ta 2 O 5 /Y 2 O 3 Is 0.5 or less, more preferably Ta 2 O 5 /Y 2 O 3 Is 0.3 or less, and Ta is more preferable 2 O 5 /Y 2 O 3 Is 0.1 or less; and/or Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.5 or less, preferably Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.3 or less, and Ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.2 or less, and Ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.1 or less; and/or (TiO) 2 +WO 3 )/Y 2 O 3 Is 1.0 or less, preferably (TiO) 2 +WO 3 )/Y 2 O 3 Is 0.8 or less, more preferably (TiO) 2 +WO 3 )/Y 2 O 3 Is 0.6 or less, and (TiO) is more preferable 2 +WO 3 )/Y 2 O 3 Is 0.3 or less; and/or (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 1.0 or less, preferably (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 0.8 or less, more preferably (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 0.5 or less, and (Gd) is more preferable 2 O 3 +ZnO)/Y 2 O 3 Is 0.3 or less.
(7) The optical glass according to any one of (1) to (4), which comprises, in terms of weight percent: siO 2 2 :3 to 15%, preferably SiO 2 :4 to 10 percent; and/or B 2 O 3 :5 to 15%, preferably B 2 O 3 :7 to 13 percent; and/or La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :50 to 75%, preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :55 to 70%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :60 to 70 percent; and/or ZrO 2 :3 to 13%, preferably ZrO 2 :4 to 10 percent; and/or Nb 2 O 5 :4 to 15%, preferably Nb 2 O 5 :5 to 10 percent; and/or Ta 2 O 5 :0 to 2%, preferably Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :0 to 5%, preferably TiO 2 :0 to 3 percent; and/or RO:0 to 3%, preferably RO:0 to 2 percent; and/or Rn 2 O:0 to 3%, preferably Rn 2 O:0 to 2 percent; and/or WO 3 :0 to 3%, preferably WO 3 :0 to 2 percent; and/or ZnO:0 to 4%, preferably ZnO:0 to 2 percent; and/or Al 2 O 3 :0 to 4%, preferably Al 2 O 3 :0 to 2 percent; and/or Yb 2 O 3 :0 to 5%, preferably Yb 2 O 3 :0 to 3 percent; and/or GeO 2 :0 to 3%, preferably GeO 2 :0 to 1 percent; and/or a clarifying agent: 0 to 1%, preferably a clarifying agent: 0 to 0.5 percent of the total weight of the catalyst, wherein the RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
(8) The optical glass according to any one of (1) to (4), which comprises, in terms of weight percent: la 2 O 3 :35 to 60%, preferably La 2 O 3 :38 to 56%, more preferably La 2 O 3 :41 to 54 percent; and/or Y 2 O 3 :6 to 30%, preferably Y 2 O 3 :7 to 24%, more preferably Y 2 O 3 :8 to 22%, more preferably Y 2 O 3 :11 to 22 percent; and/or Gd 2 O 3 :0 to 10%, preferably Gd 2 O 3 :0 to 8%, more preferably Gd 2 O 3 :0 to 5%, more preferably Gd 2 O 3 ：0～3％。
(9) The optical glass according to any one of (1) to (4), which does not contain WO in its composition 3 (ii) a And/or does not contain Ta 2 O 5 (ii) a And/orDoes not contain RO; and/or does not contain Rn 2 O; and/or no ZnO; and/or does not contain Al 2 O 3 (ii) a And/or does not contain GeO 2 The RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O.
(10) The optical glass according to any one of (1) to (4), wherein the refractive index n of the optical glass d 1.85 to 1.91, preferably 1.86 to 1.90, more preferably 1.875 to 1.895, abbe number v d 35 to 43, preferably 37 to 42, more preferably 38 to 41.
(11) The optical glass according to any one of (1) to (4), wherein the density ρ of the optical glass is 5.10g/cm 3 Hereinafter, preferably 5.00g/cm 3 Hereinafter, more preferably 4.90g/cm 3 The following; and/or coefficient of thermal expansion alpha -30/70℃ Is 80X 10 -7 Preferably 70X 10 or less,/K -7 A value of not more than K, more preferably 65X 10 -7 below/K; and/or stability against water action D W Is 2 or more, preferably 1; and/or stability against acid action D A Is 2 or more, preferably 1; and/or lambda 70 Is 400nm or less, preferably lambda 70 Is 390nm or less, more preferably λ 70 Is 385nm or less; and/or lambda 5 Is 360nm or less, preferably lambda 5 Is 350nm or less, more preferably λ 5 Is below 345 nm; and/or the weather resistance CR is of class 2 or more, preferably of class 1; and/or Knoop hardness H K Is 650 x 10 7 Pa or more, preferably 660X 10 7 Pa or more, more preferably 670X 10 7 Pa or more, more preferably 680X 10 7 Pa or above; and/or a Young's modulus E of 11000X 10 7 Pa～14000×10 7 Pa, preferably 11500X 10 7 Pa～13500×10 7 Pa, more preferably 12000X 10 7 Pa～13000×10 7 Pa; and/or degree of wear F A From 70 to 120, preferably from 80 to 110, more preferably from 85 to 105; and/or the degree of bubbling is class A or higher, preferably class A 0 More preferably A or more 00 And (4) stage.
(12) A glass preform made of the optical glass according to any one of (1) to (11).
(13) An optical element produced from the optical glass according to any one of (1) to (11), or the glass preform according to (12).
(14) An optical device comprising the optical glass according to any one of (1) to (11), and/or comprising the optical element according to (13).
The invention has the beneficial effects that: through reasonable component design, the optical glass has higher refractive index and lower density.
The optical glass of the present invention is obtained by the following steps, which are not intended to limit the scope of the present invention. In addition, although the description of the overlapping portions may be appropriately omitted, 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 include upper and lower values, and "above" and "below" are intended to include the end points and any whole numbers and fractions subsumed within the range, unless otherwise indicated herein and not limited to the specific values recited within the recited range. As used herein, "and/or" is inclusive, e.g., "A and/or B," and means only A, or only B, or both A and B.
< essential Components and optional Components >
SiO 2 Has the effects of adjusting optical constants, improving the chemical stability of the glass, maintaining the viscosity suitable for molten glass, reducing the abrasion degree and corroding refractory materials, and contains more than 1 percent of SiO 2 To obtain the above effects, siO is preferable 2 The content of (A) is 3% or more, and SiO is more preferable 2 The content of (A) is 4% or more. If SiO 2 Too high content of (b), the difficulty of melting the glass increases, and the transition temperature increases. Thus, siO in the present invention 2 The upper limit of the content of (b) is 18%, preferably 15%, more preferably 10%.
B 2 O 3 Can improve the melting property and devitrification resistance of the glass and is beneficial to reducing the transition temperature of the glass, and the invention contains more than 4 percent of B 2 O 3 In order to obtain the above effects, it is preferable to contain 5% or more of B 2 O 3 More preferably 7% or more of B 2 O 3 . If B is 2 O 3 If the content of (b) is too high, the chemical stability of the glass is deteriorated, particularly the water resistance is deteriorated, and the refractive index and the light transmittance of the glass are lowered. Thus, B 2 O 3 The content of (b) is 18% or less, preferably 15% or less, more preferably 13% or less.
La 2 O 3 The glass is an effective component for improving the refractive index of the glass, has remarkable effects of improving the chemical stability and the devitrification resistance of the glass, and cannot reach the required optical constant if the content of the glass is less than 35 percent; if the content is more than 60%, devitrification tendency of the glass is rather increased and thermal stability is deteriorated. Thus, la 2 O 3 The content of (B) is limited to 35 to 60%, preferably 38 to 56%, more preferably 41 to 54%.
Y 2 O 3 The invention can improve the refractive index and devitrification resistance of the glass and adjust the Young's modulus of the glass by containing more than 6% of Y 2 O 3 To obtain the above effects; if the content exceeds 30%, the chemical stability and weather resistance of the glass are deteriorated. Thus, Y in the present invention 2 O 3 The content is 6 to 30%, preferably 7 to 24%, more preferably 8 to 22%, and still more preferably 11 to 22%.
At one endIn some embodiments, Y is 2 O 3 Content of (A) and (B) 2 O 3 Ratio Y between contents of 2 O 3 /B 2 O 3 The control range of 0.5-5.0 is favorable for obtaining the proper Young modulus of the glass. Therefore, Y is preferred 2 O 3 /B 2 O 3 Is 0.5 to 5.0, more preferably Y 2 O 3 /B 2 O 3 0.6 to 3.0. Further, by adding Y 2 O 3 /B 2 O 3 The control range is 0.7-2.5, which is beneficial to further reducing the thermal expansion coefficient of the glass and optimizing the bubble degree of the glass. Therefore, Y is more preferable 2 O 3 /B 2 O 3 Is 0.7 to 2.5, and Y is more preferably 2 O 3 /B 2 O 3 0.8 to 2.0.
Gd 2 O 3 The refractive index and chemical stability of the glass can be improved, but if the content thereof is more than 10%, devitrification resistance and abrasion resistance of the glass are deteriorated. Thus, gd 2 O 3 The content of (b) is 0 to 10%, preferably 0 to 8%, more preferably 0 to 5%, and further preferably 0 to 3%.
In some embodiments, gd is 2 O 3 Content of (D) and SiO 2 And B 2 O 3 SiO in total content 2 +B 2 O 3 Ratio between Gd 2 O 3 /(SiO 2 +B 2 O 3 ) And the density of the glass can be reduced and the bubble degree and the abrasion degree of the glass can be optimized by controlling the density to be less than 1.0. Gd is therefore preferred 2 O 3 /(SiO 2 +B 2 O 3 ) Is 1.0 or less, more preferably Gd 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.6 or less, and Gd is more preferable 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.5 or less, and Gd is more preferable 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.3 or less.
In some embodiments, by passing La 2 O 3 、Y 2 O 3 And Gd 2 O 3 The total content La of 2 O 3 +Y 2 O 3 +Gd 2 O 3 Controlled in the range of 45 to 75%, the glass is easier to obtain the desired refractive index and Abbe number, and the devitrification resistance and weather resistance of the glass are optimized. Therefore, la is preferable 2 O 3 +Y 2 O 3 +Gd 2 O 3 From 45 to 75%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 50 to 75%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 Is 55 to 70%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 60 to 70 percent.
Yb 2 O 3 And is a component imparting high-refractivity, low-dispersion properties to the glass, and if the content thereof exceeds 8%, the devitrification resistance of the glass is lowered. Thus, yb 2 O 3 The content of (B) is 0 to 8%, preferably 0 to 5%, more preferably 0 to 3%, and further preferably no Yb 2 O 3 。
ZrO 2 The viscosity, hardness, refractive index and chemical stability of the optical glass can be improved, and the thermal expansion coefficient of the glass can be reduced; when ZrO 2 When the content of (b) is too high, devitrification resistance of the glass is lowered, difficulty in melting is increased, melting temperature is increased, and inclusions appear in the glass and light transmittance is lowered. Thus, zrO in the invention 2 The content of (B) is 2 to 15%, preferably 3 to 13%, more preferably 4 to 10%.
In some embodiments, by passing La 2 O 3 And Y 2 O 3 Total content La of 2 O 3 +Y 2 O 3 And ZrO 2 Ratio between contents of (La) 2 O 3 +Y 2 O 3 )/ZrO 2 The control of the content of the organic silicon compound is more than 5.0, the glass can easily obtain the expected Young modulus, and the density of the glass is favorably reduced. Therefore, (La) is preferable 2 O 3 +Y 2 O 3 )/ZrO 2 Is 5.0 or more, more preferably (La) 2 O 3 +Y 2 O 3 )/ZrO 2 6.0 to 20.0. Further, the method can be used for preparing a novel liquid crystal displayControl (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Within the range of 7.0 to 15.0, the weatherability and hardness of the glass can be further optimized. Therefore, (La) is more preferable 2 O 3 +Y 2 O 3 )/ZrO 2 In the range of 7.0 to 15.0, more preferably (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 7.5 to 10.0.
TiO 2 The refractive index of the glass can be increased, but too high a content greatly lowers the Abbe number and increases the tendency to devitrify, even causing the glass to be colored significantly. Thus, tiO 2 The content is limited to 0 to 8%, preferably 0 to 5%, more preferably 0 to 3%.
Ta 2 O 5 The glass has the effects of improving the refractive index and improving the devitrification resistance of the glass, but if the content is too high, the thermal stability of the glass is reduced, the density is increased, and the optical constant is 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 invention 2 O 5 The content of (b) is limited to 0 to 5%, preferably 0 to 2%, more preferably 0 to 1%, and further preferably no Ta is contained 2 O 5 。
In some embodiments, ta 2 O 5 Content of (A) and Y 2 O 3 Ratio Ta between the contents of 2 O 5 /Y 2 O 3 By controlling the value to 0.8 or less, the chemical stability of the glass can be improved, and the glass can have a suitable Young's modulus and can be prevented from lowering the light transmittance. Therefore, ta is preferred 2 O 5 /Y 2 O 3 Is 0.8 or less, more preferably Ta 2 O 5 /Y 2 O 3 Is 0.5 or less, and Ta is more preferable 2 O 5 /Y 2 O 3 Is 0.3 or less, and Ta is more preferable 2 O 5 /Y 2 O 3 Is 0.1 or less.
Nb 2 O 5 Is a high-refraction high-dispersion component, can improve the refractive index and devitrification resistance of the glass, and reduce the glassBy containing 2% or more of Nb 2 O 5 To obtain the above effects, nb is preferable 2 O 5 The lower limit of the content of (B) is 4%, and the more preferable lower limit is 5%. If Nb 2 O 5 More than 18%, the glass is lowered in thermal stability and weather resistance and the light transmittance is lowered, so that Nb in the present invention is contained 2 O 5 The upper limit of the content of (b) is 18%, preferably 15%, more preferably 10%.
In some embodiments, la is 2 O 3 Content of (b) and Nb 2 O 5 A ratio La between the contents of 2 O 3 /Nb 2 O 5 The hardness of the glass is controlled within the range of 2.0 to 20.0, the light transmittance is prevented from being reduced while the hardness of the glass is improved, and the glass has a suitable Young's modulus. Therefore, la is preferable 2 O 3 /Nb 2 O 5 2.0 to 20.0, more preferably La 2 O 3 /Nb 2 O 5 Is 3.0 to 15.0, and La is more preferable 2 O 3 /Nb 2 O 5 Is 4.0 to 10.0, more preferably La 2 O 3 /Nb 2 O 5 Is 4.5 to 9.0.
In some embodiments, ta 2 O 5 Content of (2) and Nb 2 O 5 And Y 2 O 3 Total content of (B) Nb 2 O 5 +Y 2 O 3 Ratio of Ta to Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Control to 0.5 or less is preferable because chemical stability of the glass can be improved and decrease in light transmittance can be prevented, and thus Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.5 or less. Further, by controlling Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) When the amount is 0.3 or less, the weather resistance of the glass can be further improved and the abrasion degree of the glass can be optimized. Therefore, ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.3 or less, and Ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.2 or less, and Ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.1 or less.
Alkaline earth metal oxide RO (RO is one or more of MgO, caO, srO, and BaO) can adjust optical constants of the glass and optimize chemical stability of the glass, but when the content is high, devitrification resistance of the glass is lowered. Therefore, the RO content is limited to 0 to 8%, preferably 0 to 3%, and more preferably 0 to 2%. In some embodiments, it is further preferred that no RO is present.
Alkali metal oxide Rn 2 O(Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O) can lower the glass transition temperature, adjust the optical constants and high-temperature viscosity of the glass, and improve the melting property of the glass, but at a high content, the devitrification resistance and chemical stability of the glass are lowered. Thus, rn in the present invention 2 The content of O is 0 to 8%, preferably 0 to 3%, more preferably 0 to 2%. In some embodiments, it is further preferred that Rn is absent 2 O。
WO 3 Can improve the refractive index and mechanical strength of the glass, if WO 3 When the content of (B) exceeds 5%, the glass is deteriorated in thermal stability and devitrification resistance. Thus, WO 3 The upper limit of the content of (b) is 5%, preferably 3%, more preferably 2%. In some embodiments, it is further preferred that WO is absent 3 。
In some embodiments, the TiO is added to the mixture 2 And WO 3 Total content of TiO 2 +WO 3 And Y 2 O 3 Ratio between contents of (TiO) 2 +WO 3 )/Y 2 O 3 The chemical stability and the bubble degree of the glass can be improved by controlling the content of the glass to be less than 1.0. Therefore, (TiO) is preferred 2 +WO 3 )/Y 2 O 3 Is 1.0 or less, more preferably (TiO) 2 +WO 3 )/Y 2 O 3 Is 0.8 or less. Further, control (TiO) 2 +WO 3 )/Y 2 O 3 When the amount is 0.6 or less, the degree of abrasion of the glass can be further optimized to prevent the thermal expansion coefficient of the glass from increasing. Therefore, it is further preferred(TiO) is selected 2 +WO 3 )/Y 2 O 3 Is 0.6 or less, more preferably (TiO) 2 +WO 3 )/Y 2 O 3 Is 0.3 or less.
ZnO can adjust the refractive index and dispersion of the glass, and reduce the high-temperature viscosity and the transition temperature of the glass. If the content of ZnO is too high, the glass forming difficulty is increased, and the devitrification resistance is deteriorated. Therefore, the content of ZnO is 0 to 8%, preferably 0 to 4%, more preferably 0 to 2%. In some embodiments, it is further preferred that no ZnO is present.
In some embodiments, the composition is prepared by reacting Gd 2 O 3 And total content Gd of ZnO 2 O 3 + ZnO and Y 2 O 3 Ratio between contents of (Gd) 2 O 3 +ZnO)/Y 2 O 3 When the amount is controlled to 1.0 or less, the thermal expansion coefficient of the glass can be reduced, and the abrasion of the glass can be optimized. Therefore, (Gd) is preferred 2 O 3 +ZnO)/Y 2 O 3 Is 1.0 or less, more preferably (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 0.8 or less. Further, control (Gd) 2 O 3 +ZnO)/Y 2 O 3 When the value is 0.5 or less, the glass can be more easily provided with an appropriate Young's modulus, and the hardness of the glass can be prevented from being lowered. Therefore, (Gd) is more preferable 2 O 3 +ZnO)/Y 2 O 3 Is 0.5 or less, and more preferably (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 0.3 or less.
Al 2 O 3 The chemical stability of the glass can be improved, but when the content exceeds 8%, the melting property and light transmittance of the glass are deteriorated. Therefore, al in the present invention 2 O 3 The content of (b) is 0 to 8%, preferably 0 to 4%, more preferably 0 to 2%. In some embodiments, it is further preferred that Al is not present 2 O 3 。
GeO 2 Has the functions of improving refractive index and devitrification resistance, but if the content is too high, the chemical stability of the glass is reduced; on the other hand, geO is compared with other components 2 Is very expensive and should be minimized from a practical and cost standpointThe usage amount is reduced. Accordingly, geO in the present invention 2 The content of (b) is limited to 0 to 5%, preferably 0 to 3%, more preferably 0 to 1%, and further preferably no GeO is contained 2 。
In the invention, 0 to 2 percent of Sb is contained 2 O 3 、SnO、SnO 2 、CeO 2 One or more components in the glass can be used as a clarifying agent to improve the clarifying effect of the glass and improve the bubble degree of the glass, and the content of the clarifying agent is preferably 0 to 1 percent, and more preferably 0 to 0.5 percent. Since the optical glass of the present invention is excellent in the degree of foaming due to its rational component kinds and contents, it is further preferable in some embodiments that no fining agent is contained. When Sb is present 2 O 3 At contents exceeding 2%, the glass tends to have a reduced fining ability, and since the strong oxidizing action thereof promotes corrosion of the platinum or platinum alloy vessel from which the glass is melted and deterioration of the forming mold, sb is preferred in the present invention 2 O 3 The content of (B) is 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably Sb is not contained 2 O 3 . SnO and SnO 2 However, when the content exceeds 2%, the glass tends to be colored, or when the glass is heated, softened, and subjected to re-molding such as press molding, sn becomes a starting point of crystal nucleus formation, and devitrification tends to occur. Thus the SnO of the invention 2 The content of (B) is preferably 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably not containing SnO 2 (ii) a The SnO content is preferably 0 to 2%, more preferably 0 to 1%, still more preferably 0 to 0.5%, and still more preferably no SnO. CeO (CeO) 2 Action and content ratio of (B) and SnO 2 The content is preferably 0 to 2%, more preferably 0 to 1%, even more preferably 0 to 0.5%, and even more preferably no CeO 2 。
< component which should not be contained >
In the glass of the present invention, even when the glass contains a small amount of oxides of transition metals such as V, cr, mn, fe, co, ni, cu, ag, and Mo 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 effect of the present invention to improve the 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 1.85, preferably 1.86, more preferably 1.875.
In some embodiments, the refractive index (n) of the optical glass of the present invention d ) The upper limit of (2) is 1.91, preferably 1.90, and more preferably 1.895.
In some implementationsIn the mode, the Abbe number (. Nu.) of the optical glass of the present invention d ) The lower limit of (2) is 35, preferably 37, more preferably 38.
In some embodiments, the Abbe number (v) of the optical glass of the present invention d ) The upper limit of (2) is 43, preferably 42, and more preferably 41.
< Density >
The density (. Rho.) of the optical glass was measured according to the method specified in GB/T7962.20-2010.
In some embodiments, the optical glass of the present invention has a density (. Rho.) of 5.10g/cm 3 Hereinafter, preferably 5.00g/cm 3 Hereinafter, more preferably 4.90g/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 80X 10 -7 Preferably 70X 10 or less,/K -7 A value of less than or equal to K, more preferably 65X 10 -7 and/K is less than or equal to.
< stability against Water action >
Stability to Water of optical glass (D) W ) (powder method) the test was carried out according to the method described 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.
< degree of coloration >
Coloring degree (. Lamda.) for short-wave transmission spectral characteristics of the glass of the present invention 70 And λ 5 ) And (4) showing. Lambda [ alpha ] 70 The wavelength corresponding to the glass transmittance of 70% is meant. Lambda 70 Is measured using a glass having a thickness of 10 + -0.1 mm with two opposing planes parallel to each other and optically polished, measuring a spectral transmittance in a wavelength region from 280nm to 700nm and exhibiting a wavelength of transmittance of 70%. 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 high refractive index glasses, λ 70 A small value of (A) means that the glass itself is rarely colored and has a high light transmittance.
In some embodiments, the λ of the optical glass of the present invention 70 Is 400nm or less, preferably lambda 70 Is 390nm or less, more preferably λ 70 385nm or less.
In some embodiments, the lambda of the optical glass of the present invention 5 Is 360nm or less, preferably lambda 5 Is 350nm or less, more preferably lambda 5 Is 345nm or less.
< weather resistance >
The optical glass was tested for weatherability (CR) as follows: the sample is placed in a test box in a saturated water vapor environment with the relative humidity of 90 percent, and is alternately circulated at intervals of 1h at the temperature of 40-50 ℃ for 15 periods. Weather resistance categories were classified according to the amount of change in haze before and after the sample was left, and the weather resistance categories are shown in table 1:
table 1.
In some embodiments, the optical glass of the present invention has a weatherability (CR) of 2 or more, preferably 1 or more.
< Knoop hardness >
Knoop hardness (H) of optical glass K ) According to GB/T7962.18-2010 for testing according to the test method specified.
In some embodiments, the Knoop hardness (H) of the optical glasses of the present invention K ) Is 650 x 10 7 Pa or more, preferably 660X 10 7 Pa or more, more preferably 670X 10 7 Pa or more, and more preferably 680X 10 7 Pa or above.
< 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.
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 11000X 10 7 Pa, preferably lower limit of 11500X 10 7 Pa, more preferably a lower limit of 12000X 10 7 Pa。
In some embodiments, the Young's modulus (E) of the optical glass of the present invention has an upper limit of 14000X 10 7 Pa, preferably an upper limit of 13500X 10 7 Pa, more preferably up to 13000X 10 7 Pa。
< degree of abrasion >
Degree of abrasion (F) of optical glass A ) The abrasion loss of the sample is multiplied by 100 under the same conditions, and the value is expressed by the following formula:
F A ＝V/V 0 ×100＝(W/ρ)/(W 0 /ρ 0 )×100
in the formula: v is the volume abrasion amount of the sample to be measured;
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 ) The lower limit of (2) is 70, preferably 80, and more preferably 85.
In some embodiments, the optical glass of the present invention has an abrasion loss (F) A ) The upper limit of (2) is 120, preferably 110, more preferably 105.
< degree of bubbling >
The bubble degree of the optical glass was measured according to the method specified in GB/T7962.8-2010.
In some embodiments, the optical glass of the present invention has a degree of foaming of class A or more, preferably class A 0 More preferably A or more 00 And (4) stage.
[ method for producing optical glass ]
The method for manufacturing the optical glass comprises the following steps: the glass of the present invention is produced by using conventional materials and processes including but not limited to oxides, hydroxides, complex salts (such as carbonates, nitrates, sulfates, etc.), boric acid, etc. as raw materials, blending by conventional methods, then putting the blended charge into a melting furnace (such as platinum or platinum alloy crucible) at 1200-1450 ℃ to melt, and after clarification and homogenization, obtaining homogeneous molten glass without bubbles and undissolved substances, and casting and annealing the molten glass in a mold. Those skilled in the art can appropriately select the raw materials, the process method and the process parameters according to the actual needs.
[ glass preform and optical element ]
The glass preform can be produced from the optical glass produced by press molding such as direct gob molding, grinding, or hot press molding. That is, a glass preform can be produced by directly precision-gob-molding a molten optical glass into a glass precision preform, by machining such as grinding and polishing, or by producing a preform for press molding from an optical glass, by subjecting the preform to reheat press molding and then to polishing. Note that the means for producing the glass preform is not limited to the above means.
As described above, the optical glass of the present invention is useful for various optical elements and optical designs, and among them, it is particularly preferable to form a preform from the optical glass of the present invention, and use the preform for reheat press forming, precision press forming, or the like to produce optical elements such as lenses, prisms, or the like.
The glass preform of the present invention and the optical element are each formed of the above-described optical glass of the present invention. The glass preform of the present invention has excellent characteristics possessed by optical glass; the optical element of the present invention has excellent characteristics of optical glass, and can provide optical elements such as various lenses and prisms having high optical values.
Examples of the lens include various lenses such as a concave meniscus lens, a convex meniscus lens, a double convex lens, a double concave lens, a plano-convex lens, and a plano-concave lens, each of which has a spherical or aspherical lens surface.
[ optical Instrument ]
The optical element formed by the optical glass can be used for manufacturing optical instruments such as photographic equipment, camera equipment, projection equipment, display equipment, vehicle-mounted equipment, monitoring equipment and the like.
Examples
< example of optical glass >
In order to further clarify the explanation and explanation of the technical solution of the present invention, the following non-limiting examples are provided.
In this example, optical glasses having compositions shown in tables 2 to 4 were obtained by the above-mentioned method for producing optical glasses. The characteristics of each glass were measured by the test method described in the present invention, and the measurement results are shown in tables 2 to 4.
Table 2.
Table 3.
Table 4.
< glass preform example >
Various lenses such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens and a plano-concave lens, and preforms such as prisms were produced by using the glasses obtained in examples 1 to 24# of optical glasses by means of polishing or by means of press molding such as reheat press molding and precision press molding.
< optical element example >
The preforms obtained from the above glass preform examples were annealed to reduce the internal stress of the glass and to fine-tune the refractive index so that the optical properties such as refractive index reached the desired values.
Next, each preform is ground and polished to produce various lenses such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens, and prisms. The surface of the resulting optical element may be coated with an antireflection film.
< optical Instrument embodiment >
The optical element produced by the above-described optical element embodiment can be used, for example, for imaging apparatuses, sensors, microscopes, medical technologies, digital projection, communications, optical communication technologies/information transmission, optics/lighting in the automotive field, lithography, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices including such circuits and chips by forming an optical component or optical assembly by using one or more optical elements through optical design.
Claims (14)
1. Optical glass, characterized in that its composition, expressed in weight percentage, contains: siO 2 2 ：1～18％；B 2 O 3 ：4～18％；ZrO 2 ：2～15％；Nb 2 O 5 ：2～18％；La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :45 to 75 percent of (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 5.0 or more.
2. An optical glass according to claim 1, characterized in that its composition, expressed in weight percent, further comprises: ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 8 percent; and/or RO:0 to 8 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 8 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0 to 2 percent of RO, rn and one or more of MgO, caO, srO and BaO 2 O is Li 2 O、Na 2 O、K 2 One kind of OOr more, the clarifying agent is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
3. Optical glass, characterized in that its composition contains SiO 2 、B 2 O 3 、ZrO 2 、Nb 2 O 5 And further contains 45 to 75 weight percent of La 2 O 3 +Y 2 O 3 +Gd 2 O 3 Wherein (La) 2 O 3 +Y 2 O 3 )/ZrO 2 A refractive index n of 5.0 or more, the optical glass d Is 1.85 to 1.91, abbe number v d 35 to 43 and a density rho of 5.10g/cm 3 The following.
4. An optical glass according to claim 3, characterised in that its composition, expressed in weight percentage, contains: siO 2 2 :1 to 18 percent; and/or B 2 O 3 :4 to 18 percent; and/or ZrO 2 :2 to 15 percent; and/or Nb 2 O 5 :2 to 18 percent; and/or Ta 2 O 5 :0 to 5 percent; and/or TiO 2 :0 to 8 percent; and/or RO:0 to 8 percent; and/or Rn 2 O:0 to 8 percent; and/or WO 3 :0 to 5 percent; and/or ZnO:0 to 8 percent; and/or Al 2 O 3 :0 to 8 percent; and/or Yb 2 O 3 :0 to 8 percent; and/or GeO 2 :0 to 5 percent; and/or a clarifying agent: 0 to 2 percent of RO, rn and one or more of MgO, caO, srO and BaO 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
5. An optical glass according to any one of claims 1 to 4, characterized in that its composition, expressed in weight percentages, is such that: (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 6.0 to 20.0, preferably (La) 2 O 3 +Y 2 O 3 )/ZrO 2 Is 7.0 to 15.0, more preferably (La) 2 O 3 +Y 2 O 3 )/ZrO 2 7.5 to 10.0; and/or Y 2 O 3 /B 2 O 3 0.5 to 5.0, preferably Y 2 O 3 /B 2 O 3 Is 0.6 to 3.0, more preferably Y 2 O 3 /B 2 O 3 Is 0.7 to 2.5, and Y is more preferably 2 O 3 /B 2 O 3 0.8 to 2.0; and/or La 2 O 3 /Nb 2 O 5 2.0 to 20.0, preferably La 2 O 3 /Nb 2 O 5 Is 3.0 to 15.0, more preferably La 2 O 3 /Nb 2 O 5 Is 4.0 to 10.0, and La is more preferable 2 O 3 /Nb 2 O 5 Is 4.5 to 9.0.
6. An optical glass according to any one of claims 1 to 4, characterised in that its components, expressed in weight percentage, are: gd (Gd) 2 O 3 /(SiO 2 +B 2 O 3 ) Is 1.0 or less, preferably Gd 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.6 or less, more preferably Gd 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.5 or less, and Gd is more preferable 2 O 3 /(SiO 2 +B 2 O 3 ) Is 0.3 or less; and/or Ta 2 O 5 /Y 2 O 3 Is 0.8 or less, preferably Ta 2 O 5 /Y 2 O 3 Is 0.5 or less, more preferably Ta 2 O 5 /Y 2 O 3 Is 0.3 or less, and Ta is more preferable 2 O 5 /Y 2 O 3 Is 0.1 or less; and/or Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.5 or less, preferably Ta 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.3 or less, and Ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.2 or less, and Ta is more preferable 2 O 5 /(Nb 2 O 5 +Y 2 O 3 ) Is 0.1 or less; and/or (TiO) 2 +WO 3 )/Y 2 O 3 Is 1.0 or less, preferably (TiO) 2 +WO 3 )/Y 2 O 3 Is 0.8 or less, more preferably (TiO) 2 +WO 3 )/Y 2 O 3 Is 0.6 or less, and (TiO) is more preferable 2 +WO 3 )/Y 2 O 3 Is 0.3 or less; and/or (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 1.0 or less, preferably (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 0.8 or less, more preferably (Gd) 2 O 3 +ZnO)/Y 2 O 3 Is 0.5 or less, and (Gd) is more preferable 2 O 3 +ZnO)/Y 2 O 3 Is 0.3 or less.
7. An optical glass according to any one of claims 1 to 4, characterized in that its composition, expressed in weight percent, comprises: siO 2 2 :3 to 15%, preferably SiO 2 :4 to 10 percent; and/or B 2 O 3 :5 to 15%, preferably B 2 O 3 :7 to 13 percent; and/or La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :50 to 75%, preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :55 to 70%, more preferably La 2 O 3 +Y 2 O 3 +Gd 2 O 3 :60 to 70 percent; and/or ZrO 2 :3 to 13%, preferably ZrO 2 :4 to 10 percent; and/or Nb 2 O 5 :4 to 15%, preferably Nb 2 O 5 :5 to 10 percent; and/or Ta 2 O 5 :0 to 2%, preferably Ta 2 O 5 :0 to 1 percent; and/or TiO 2 :0 to 5%, preferably TiO 2 :0 to 3 percent; and/or RO:0 to 3%, preferably RO:0 to 2 percent; and/or Rn 2 O:0 to 3%, preferably Rn 2 O:0 to 2 percent; and/or WO 3 :0 to 3%, preferably WO 3 :0 to 2 percent; and/or ZnO:0 to 4%, preferably ZnO:0 to 2 percent; and/or Al 2 O 3 :0 to 4%, preferably Al 2 O 3 :0 to 2 percent; and/orYb 2 O 3 :0 to 5%, preferably Yb 2 O 3 :0 to 3 percent; and/or GeO 2 :0 to 3%, preferably GeO 2 :0 to 1 percent; and/or a clarifying agent: 0 to 1%, preferably a clarifying agent: 0 to 0.5 percent of the total weight of the catalyst, wherein the RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O and Sb as clarifier 2 O 3 、SnO、SnO 2 、CeO 2 One or more of (a).
8. An optical glass according to any one of claims 1 to 4, characterised in that its components, expressed in weight percentage, are: la 2 O 3 :35 to 60%, preferably La 2 O 3 :38 to 56%, more preferably La 2 O 3 :41 to 54 percent; and/or Y 2 O 3 :6 to 30%, preferably Y 2 O 3 :7 to 24%, more preferably Y 2 O 3 :8 to 22%, and Y is more preferably 2 O 3 :11 to 22 percent; and/or Gd 2 O 3 :0 to 10%, preferably Gd 2 O 3 :0 to 8%, more preferably Gd 2 O 3 :0 to 5%, more preferably Gd 2 O 3 ：0～3％。
9. An optical glass according to any one of claims 1 to 4, characterised in that its composition does not contain WO 3 (ii) a And/or does not contain Ta 2 O 5 (ii) a And/or does not contain RO; and/or does not contain Rn 2 O; and/or does not contain ZnO; and/or does not contain Al 2 O 3 (ii) a And/or does not contain GeO 2 The RO is one or more of MgO, caO, srO and BaO, and Rn 2 O is Li 2 O、Na 2 O、K 2 One or more of O.
10. An optical glass according to any one of claims 1 to 4, wherein the refractive index n of the optical glass is d 1.85 to 1.91, preferably 1.86 to 1.90, more preferably 1.875 to 1.895, abbeNumber v d 35 to 43, preferably 37 to 42, more preferably 38 to 41.
11. An optical glass according to any one of claims 1 to 4, wherein the optical glass has a density p of 5.10g/cm 3 Hereinafter, preferably 5.00g/cm 3 Hereinafter, more preferably 4.90g/cm 3 The following; and/or coefficient of thermal expansion alpha -30/70℃ Is 80X 10 -7 Preferably 70X 10 or less,/K -7 A value of less than or equal to K, more preferably 65X 10 -7 below/K; and/or stability against water action D W Is 2 or more, preferably 1; and/or stability against acid action D A Is 2 or more, preferably 1; and/or lambda 70 Is 400nm or less, preferably lambda 70 Is 390nm or less, more preferably λ 70 Is 385nm or less; and/or lambda 5 Is 360nm or less, preferably lambda 5 Is 350nm or less, more preferably λ 5 Is below 345 nm; and/or the weather resistance CR is of class 2 or more, preferably of class 1; and/or Knoop hardness H K Is 650X 10 7 Pa or more, preferably 660X 10 7 Pa or more, more preferably 670X 10 7 Pa or more, and more preferably 680X 10 7 Pa is above; and/or a Young's modulus E of 11000X 10 7 Pa～14000×10 7 Pa, preferably 11500X 10 7 Pa～13500×10 7 Pa, more preferably 12000X 10 7 Pa～13000×10 7 Pa; and/or degree of wear F A From 70 to 120, preferably from 80 to 110, more preferably from 85 to 105; and/or the degree of bubbling is class A or higher, preferably class A 0 More preferably A or more 00 And (4) stages.
12. A glass preform, characterized by being made of the optical glass according to any one of claims 1 to 11.
13. An optical element, characterized by being made of the optical glass of any one of claims 1 to 11 or the glass preform of claim 12.
14. An optical device comprising the optical glass according to any one of claims 1 to 11 and/or comprising the optical element according to claim 13.
Priority Applications (1)
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| CN202211031098.8A CN115304269A (en) | 2022-08-26 | 2022-08-26 | Optical glass |
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| CN202211031098.8A CN115304269A (en) | 2022-08-26 | 2022-08-26 | Optical glass |
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