Environment-friendly optical glass and optical element

Abstract

The invention provides environment-friendly optical glass which is relatively low in raw material cost. The environment-friendly optical glass comprises the following components in percentage by weight: 28.0 to 42.0 percent of SiO2; 1.0 to 9.5 percent of B2O3; zrO2: 1.0 to 10.0 percent; 2.0% to 14.5% of Nb2O5 (niobium oxide); 2.0 to 14.5 percent of ZnO (zinc oxide); 3.0 to 16.0% of TiO2 (titanium dioxide); 2.0 to 22.0% of RO (Reactive Oxygen); the RO is the total content of the MgO, the CaO, the SrO and the BaO, and the total content of the MgO, the CaO, the SrO and the BaO is less Through reasonable component design, the environment-friendly optical glass with expected refractive index and Abbe number can be obtained with lower raw material cost, and light weight and miniaturization of optical equipment can be realized.

Description

Technical Field

[0001] This invention relates to an optical glass, and more particularly to an environmentally friendly optical glass with low raw material costs, and optical components made therefrom. Background Technology

[0002] In recent years, the rapid development of digitalization and high precision in optical systems has led to increased demands for reducing the number of optical components such as lenses and prisms, and for overall lightweighting and miniaturization of optical systems in various optical equipment fields, including digital cameras, camcorders, projectors, and projection televisions. This has resulted in a significant need for high-refractive-index, high-dispersion optical glasses with refractive indices of 1.665–1.735 and Abbe numbers of 31.50–37.50, which can achieve overall lightweighting and miniaturization of optical systems. Chinese patent CN106830677A discloses an optical glass with a refractive index of 1.65–1.80 and an Abbe number of 28–45, containing 20.0–50.0 wt% Nb₂O₅. However, the high cost of Nb₂O₅ hinders the economic viability of large-scale production of optical glass. Chinese patent CN101549955A discloses an optical glass with a refractive index of 1.59 to 1.71 and an Abbe number of 30 to 43. Although the raw material cost is low, the glass composition contains 25 to 60 wt% PbO, which will cause environmental pollution and does not meet environmental protection requirements. Summary of the Invention

[0003] Based on the above reasons, the technical problem to be solved by the present invention is to provide an environmentally friendly optical glass with low raw material cost.

[0004] The technical solution adopted by this invention to solve the technical problem is:

[0005] (1) Environmentally friendly optical glass, the composition of which is expressed as a weight percentage, contains: SiO2: 28.0-42.0%; B2O3: 1.0-9.5%; ZrO2: 1.0-10.0%; Nb2O5: 2.0-14.5%; ZnO: 2.0-14.5%; TiO2: 3.0-16.0%; RO: 2.0-22.0%; Na2O: 2.0-15.0%, wherein RO is the total content of MgO, CaO, SrO and BaO.

[0006] (2) The environmentally friendly optical glass according to (1) further comprises, by weight percentage: La2O3: 0-10.0%; and / or Al2O3: 0-8.0%; and / or Y2O3: 0-8.0%; and / or Gd2O3: 0-5.0%; and / or Li2O: 0-8.0%; and / or K2O: 0-8.0%; and / or P2O5: 0-5.0%; and / or WO3: 0-3.0%; and / or clarifying agent: 0-1.0%, wherein the clarifying agent is one or more of Sb2O3, SnO, SnO2, and CeO2.

[0007] (3) Environmentally friendly optical glass, the composition of which is expressed as a weight percentage: SiO2: 28.0–42.0%; B2O3: 1.0–9.5%; ZrO2: 1.0–10.0%; Nb2O5: 2.0–14.5%; ZnO: 2.0–14.5%; TiO2: 3.0–16.0%; RO: 2.0–22.0%; Na2O: 2.0–15.0%; La2O3: 0–10.0%. Al2O3: 0–8.0%; Y2O3: 0–8.0%; Gd2O3: 0–5.0%; Li2O: 0–8.0%; K2O: 0–8.0%; P2O5: 0–5.0%; WO3: 0–3.0%; clarifying agent: 0–1.0% composition, wherein RO is the total content of MgO, CaO, SrO, and BaO, and the clarifying agent is one or more of Sb2O3, SnO, SnO2, and CeO2.

[0008] (4) The environmentally friendly optical glass according to any one of (1) to (3), wherein the components are expressed as weight percentages, wherein: Rn2O: 2.0 to 24.0%, preferably Rn2O: 5.0 to 20.0%, more preferably Rn2O: 7.0 to 15.0%; and / or (La2O3+Na2O) / Nb2O5 is 0.50 to 7.00, preferably (La2O3+Na2O) / Nb2O5 is 0.80 to 5.00, more preferably (La2O3+Na2O) / Nb2O5 is 1.00 to 3.50, and even more preferably (La2O3+Na2O) / Nb2O5 is 1.00 to 3.50. The ratio of (a₂O₃+Na₂O) / Nb₂O₅ is 1.10–2.00; and / or (La₂O₃+BaO) / Na₂O is 0.30–7.00, preferably (La₂O₃+BaO) / Na₂O is 0.50–5.00, more preferably (La₂O₃+BaO) / Na₂O is 0.80–3.00, even more preferably (La₂O₃+BaO) / Na₂O is 1.00–2.50; and / or Y₂O₃ / Na₂O is 0.05–2.00, preferably Y₂O₃ / Na₂O is 0.08–1.50. More preferably, the Y₂O₃ / Na₂O ratio is 0.10–1.00, even more preferably, it is 0.10–0.70; and / or (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 1.00–9.00, preferably (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 2.00–7.50, even more preferably (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 2.50–6.00, even more preferably... The preferred ratio of (Nb2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is 3.20-4.80; and / or the ratio of (Li2O+K2O) / Al2O3 is 0.20-5.00, preferably (Li2O+K2O) / Al2O3 is 0.50-3.50, more preferably (Li2O+K2O) / Al2O3 is 0.80-3.00, and even more preferably (Li2O+K2O) / Al2O3 is 1.00-2.50, where Rn2O is the total content of Li2O, Na2O, and K2O.

[0009] (5) The environmentally friendly optical glass according to any one of (1) to (3), wherein the composition is expressed as a weight percentage, wherein: SiO2 / (B2O3+BaO) is 1.50 to 8.00, preferably SiO2 / (B2O3+BaO) is 1.80 to 6.00, more preferably SiO2 / (B2O3+BaO) is 2.00 to 5.50, even more preferably SiO2 / (B2O3+BaO) is 2.80 to 3.80; and / or (ZnO+BaO) / SiO2 is 0.10 to 0.80, preferably (ZnO+BaO) / SiO2 is 0.20 to 0.70, more ... The ratio of (Nb2O5+ZrO2) / (ZnO+TiO2) is 0.30–0.60; and / or the ratio of (Nb2O5+ZrO2) / (ZnO+TiO2) is 0.30–3.00, preferably (Nb2O5+ZrO2) / (ZnO+TiO2) is 0.35–2.00, more preferably (Nb2O5+ZrO2) / (ZnO+TiO2) is 0.40–1.40, even more preferably (Nb2O5+ZrO2) / (ZnO+TiO2) is 0.50–1.00; and / or the ratio of (Nb2O5+TiO2+CaO) / SiO2 is 0.15–1.00, preferably (Nb2O5+TiO2+CaO) / SiO2 is 0.15–1.00, preferably (Nb2O5+TiO2+CaO) / SiO2 is 0.15–1.00. The ratio of (Nb2O5+TiO2+CaO) / SiO2 is 0.20–0.80, more preferably 0.30–0.70; and / or the ratio of La2O3 / TiO2 is 0.20–2.50, preferably 0.20–2.00, more preferably 0.30–1.50, and even more preferably 0.30–1.00; and / or the ratio of ZnO / La2O3 is 0.30–8.00, preferably 0.50–5.00, and more preferably 0.80–3.50. Further preferred ZnO / La2O3 is 1.00–2.50; and / or Y2O3 / SrO is 0.10–5.00, preferably Y2O3 / SrO is 0.20–4.00, more preferably Y2O3 / SrO is 0.30–2.00, even more preferably Y2O3 / SrO is 0.40–1.00; and / or 5×P2O5 / Al2O3 is 0.10–6.00, preferably 5×P2O5 / Al2O3 is 0.20–3.50, more preferably 5×P2O5 / Al2O3 is 0.30–2.50, even more preferably 5×P2O5 / Al2O3 is 0.50–1.50.

[0010] (6) The environmentally friendly optical glass according to any one of (1) to (3), wherein its components are expressed as weight percentages, wherein: SiO2: 30.5-39.5%, preferably SiO2: 32.0-37.0%; and / or B2O3: 2.0-8.0%, preferably B2O3: 2.5-7.0%; and / or ZrO2: 2.0-8.5%, preferably ZrO2: 3.0-7.0%; and / or La2O3: 1.0-9.0%, preferably La2O3: 3.0-8.0%. %; and / or Nb2O5: 4.0–12.0%, preferably Nb2O5: 5.0–10.0%; and / or ZnO: 4.0–12.0%, preferably ZnO: 5.0–10.0%; and / or TiO2: 5.0–15.0%, preferably TiO2: 7.0–13.0%; and / or RO: 3.0–18.0%, preferably RO: 5.0–15.0%; and / or Li2O: greater than 0% but less than or equal to 6.0%, preferably Li2O: 0.1–4%. 0.0%; and / or Na2O: 4.0–12.0%, preferably Na2O: 5.0–10.0%; and / or K2O: 0.1–6.0%, preferably K2O: 0.5–4.5%; and / or Al2O3: 0.1–6.0%, preferably Al2O3: 0.5–4.0%; and / or Y2O3: greater than 0% but less than or equal to 6.0%, preferably Y2O3: 0.1–4.0%; and / or Gd2O3: 0–3.0%, preferably Gd2O3: 0–1.0%. 0%, more preferably free of Gd2O3; and / or P2O5: 0-3.0%, preferably P2O5: greater than 0% but less than or equal to 2.0%; and / or WO3: 0-2.0%, preferably WO3: 0-1.0%, more preferably free of WO3; and / or clarifying agent: 0-0.5%, preferably clarifying agent: 0-0.2%, wherein RO is the total content of MgO, CaO, SrO, and BaO, and the clarifying agent is one or more of Sb2O3, SnO, SnO2, and CeO2.

[0011] (7) The environmentally friendly optical glass according to any one of (1) to (3), wherein the components are expressed in weight percentage, wherein: BaO: 1.0 to 12.0%, preferably BaO: 2.0 to 10.0%, more preferably BaO: 3.0 to 8.0%; and / or SrO: 0.1 to 10.0%, preferably SrO: 0.5 to 8.0%, more preferably SrO: 1.0 to 6.0%; and / or CaO: 0 to 5.0%, preferably CaO: 0 to 3.0%, more preferably CaO: 0 to 2.0%, and further preferably does not contain CaO; and / or MgO: 0 to 5.0%, preferably MgO: 0 to 4.0%, more preferably MgO: 0 to 2.0%, and further preferably does not contain MgO.

[0012] (8) The environmentally friendly optical glass according to any one of (1) to (3), wherein the refractive index n of the environmentally friendly optical glass is... d The Abbe number v is 1.665–1.735, preferably 1.670–1.730, more preferably 1.680–1.710. d The value is 31.50 to 37.50, preferably 32.00 to 37.00, and more preferably 34.00 to 36.50.

[0013] (9) The environmentally friendly optical glass according to any one of (1) to (3), wherein the density ρ of the environmentally friendly optical glass is 3.60 g / cm³. 3 The preferred value is 3.50 g / cm³. 3 The preferred value is 3.40 g / cm³. 3 The following are required: and / or weather resistance (CR) is Class 2 or above, preferably Class 1; and / or water resistance stability (D). W It is classified as Class 2 or above, preferably Class 1; and / or acid resistance stability D A It is of two or more classes, preferably of one class; and / or the coefficient of thermal expansion α -30 / 70℃ 90×10 -7 / K or less, preferably 80×10 -7 / K or less, preferably 75×10 -7 Below / K; and / or transition temperature T g Temperature is below 590°C, preferably below 580°C, and more preferably below 570°C; and / or Knoop hardness H K 520×10 7 Pa or higher, preferably 540 × 10 Pa 7 Pa or higher, more preferably 550 × 10 Pa 7 Pa or above; and / or Young's modulus E is 8500 × 10⁻⁶. 7 Pa or higher, preferably 9000×10 Pa 7 Pa or higher, more preferably 9200 × 10 Pa. 7 Pa or above; and / or λ 80 For wavelengths below 425nm, λ is preferred. 80 For wavelengths below 415nm, λ is preferred. 80 The wavelength is 410 nm or less; and / or λ5 is 375 nm or less, preferably 365 nm or less, more preferably 360 nm or less; and / or the bubble density is A grade or higher, preferably A0 grade or higher, more preferably A. 00 class.

[0014] (10) Glass preforms are made of any of the environmentally friendly optical glass described in (1) to (9).

[0015] (11) Optical element, made of any of the environmentally friendly optical glass described in (1) to (9), or made of the glass preform described in (10).

[0016] (12) An optical device comprising any one of the environmentally friendly optical glass described in (1) to (9), and / or comprising the optical element described in (11).

[0017] The beneficial effects of this invention are: through reasonable component design, this invention can obtain environmentally friendly optical glass with desired refractive index and Abbe number at a lower raw material cost, which is conducive to achieving lightweighting and miniaturization of optical equipment. Detailed Implementation

[0018] The embodiments of the environmentally friendly optical glass of the present invention will now be described in detail. However, the present invention is not limited to the embodiments described below, and appropriate modifications can be made to implement it within the scope of the purpose of the present invention. Furthermore, regarding repeated descriptions, although there are appropriate omissions, this will not limit the spirit of the invention. In the following text, the environmentally friendly optical glass of the present invention will sometimes be simply referred to as optical glass or glass.

[0019] Optical Glass

[0020] The composition range of each component in the environmentally friendly optical glass of the present invention is described below. In this invention, unless otherwise specified, the content, total content, and aggregate content of each component are all expressed as a weight percentage (wt%), that is, the weight percentage of the content, total content, and aggregate content of each component relative to the total weight of the glass material converted into oxide composition. Here, "converted into oxide composition" refers to the total amount of oxides used as raw materials for the optical glass of the present invention, where the oxides, composite salts, and hydroxides decompose and transform into oxides upon melting, and the total amount of such oxides is taken as 100%.

[0021] Unless otherwise specified in the specific context, the numerical ranges listed in this invention include upper and lower limits, and "above" and "below" include endpoint values ​​and all integers and fractions included in the range, but are not limited to the specific values ​​listed when the range is defined. The term "and / or" as used herein is inclusive; for example, "A and / or B" means only A, or only B, or both A and B.

[0022] <Essential and Optional Components>

[0023] SiO2 is the framework of optical glass. As a glass network generator, it plays a role in maintaining the chemical stability of the glass, improving its resistance to devitrification, and reducing its high-temperature viscosity. In this invention, the above effects are achieved by containing 28.0% or more SiO2, preferably 30.5% or more, and more preferably 32.0% or more. If the SiO2 content exceeds 42.0%, the glass meltability decreases, making it difficult to prepare the glass raw materials and easily leading to internal quality problems such as stone formation. Simultaneously, the glass transition temperature increases, and excessively high melting temperatures also result in poor light transmittance. Therefore, the SiO2 content is 42.0% or less, preferably 39.5% or less, and more preferably 37.0% or less. In some embodiments, the SiO2 content can be 28.0%, 28.5%, 29.0%, 29.5%, 30.0%, 30.5%, 31.0%, 31.5%, 32.0%, 32.5%, 33.0%, 33.5%, 34.0%, 34.5%, 35.0%, 35.5%, 36.0%, 36.5%, 37.0%, 37.5%, 38.0%, 38.5%, 39.0%, 39.5%, 40.0%, 40.5%, 41.0%, 41.5%, 42.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0024] B2O3 can improve the melt flow properties and devitrification resistance of glass, which is beneficial for lowering the glass transition temperature. When present in appropriate amounts, it can improve the glass network strength. However, if its content is too high, it will damage the network structure, reduce the chemical stability of the glass, hinder the adjustment of optical constants, and increase the abrasion resistance and decrease the hardness of the glass. Therefore, the content of B2O3 in this invention is 1.0% to 9.5%, preferably 2.0% to 8.0%, and more preferably 2.5% to 7.0%. In some embodiments, the content of B2O3 can be 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0025] Al2O3 can improve the chemical stability, mechanical strength, and weather resistance of glass. However, if its content is too high, the meltability of the glass decreases and its resistance to crystallization deteriorates. Therefore, the content of Al2O3 is 0–8.0%, preferably 0.1–6.0%, and more preferably 0.5–4.0%. In some embodiments, the Al2O3 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0026] ZrO2 is a network intermediate component that can increase the refractive index of glass. When there is sufficient free oxygen in the glass, it can enter the glass network structure, thereby improving the glass's resistance to crystallization, chemical stability, and mechanical properties. It can also increase the glass's viscosity and visible light transmittance. However, due to the high melting point of ZrO2, if its content is too high, it will lead to an increase in the glass's melting temperature and liquidus temperature, a decrease in the glass's resistance to devitrification, and the formation of inclusions within the glass, affecting its internal quality. Therefore, in this invention, the ZrO2 content is 1.0–10.0%, preferably 2.0–8.5%, and more preferably 3.0–7.0%. In some embodiments, the ZrO2 content can be 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0027] La2O3 can increase the refractive index of glass, improve its resistance to devitrification and chemical stability. However, if the La2O3 content is too high, the hardness of the glass decreases, its resistance to crystallization deteriorates, and its density increases. Therefore, the La2O3 content in this invention is 0–10.0%, preferably 1.0–9.0%, and more preferably 3.0–8.0%. In some embodiments, the La2O3 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 9.6%, 9.8%, 10.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0028] Gd₂O₃ can improve the refractive index and chemical stability of glass, but if its content exceeds 5.0%, the glass's resistance to devitrification and abrasion deteriorates, and the raw material cost of the glass increases. Therefore, the content of Gd₂O₃ is 0–5.0%, preferably 0–3.0%, and more preferably 0–1.0%. In some embodiments, it is further preferred that the glass does not contain Gd₂O₃. In some embodiments, the content of Gd₂O₃ can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0029] Y₂O₃ can improve the refractive index and devitrification resistance of glass, and adjust the Young's modulus of glass. However, if its content is too high, the chemical stability and weather resistance of the glass will deteriorate. Therefore, the Y₂O₃ content in this invention is 0-8.0%, preferably greater than 0% but less than or equal to 6.0%, and more preferably 0.1-4.0%. In some embodiments, the content of Y₂O₃ can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0030] Nb₂O₅ can improve the refractive index and dispersion of glass, and enhance its chemical stability and devitrification resistance. In this invention, the above effects are achieved by containing 2.0% or more Nb₂O₅, preferably 4.0% or more, and more preferably 5.0% or more. If the Nb₂O₅ content is too high, the short-wave transmittance in the visible light region of the glass decreases, the glass density increases, and the raw material cost of the glass rises. Therefore, in this invention, the Nb₂O₅ content is 14.5% or less, preferably 12.0% or less, and more preferably 10.0% or less. In some embodiments, the Nb₂O₅ content can be 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0031] Alkaline earth metal oxides (RO, which is the total content of MgO, CaO, SrO, and BaO) can adjust the optical constants of glass and optimize its devitrification resistance. However, when the RO content is too high, the chemical stability of the glass decreases. Therefore, the RO content is 2.0% to 22.0%, preferably 3.0% to 18.0%, and more preferably 5.0% to 15.0%. In some embodiments, the RO content can be 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%. 13.0%, 13.5%, 14.0%, 14.5%, 15.0%, 15.5%, 16.0%, 16.5%, 17.0%, 17.5%, 18.0%, 18.5%, 19.0%, 19.5%, 20.0%, 20.5%, 21.0%, 21.5%, 22.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0032] Since the alkaline earth metal oxides MgO, CaO, SrO, and BaO play significantly different roles in glass, their contents in the glass of this invention also vary.

[0033] BaO can improve the devitrification resistance and hardness of glass, and reduce the temperature coefficient of refractive index and the coefficient of thermal expansion of glass. In this invention, the above effects are achieved by containing more than 1.0% BaO, preferably more than 2.0%, and more preferably more than 3.0%. On the other hand, by keeping the BaO content below 12.0%, the decrease in chemical stability caused by excessive BaO content can be prevented. Preferably, the BaO content is below 10.0%, and more preferably below 8.0%. In some embodiments, the BaO content can be 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0034] In some embodiments, by controlling the ratio of SiO2 content to the total content of B2O3 and BaO (B2O3+BaO), SiO2 / (B2O3+BaO), within the range of 1.50 to 8.00, it is possible to improve the bubble count of the glass while preventing an increase in the coefficient of thermal expansion. Therefore, it is preferable that SiO2 / (B2O3+BaO) is 1.50 to 8.00, more preferably 1.80 to 6.00, even more preferably 2.00 to 5.50, and even more preferably 2.80 to 3.80. In some embodiments, SiO2 / (B2O3+BaO) can be 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4... 70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.20, 6.30, 6.40, 6.50, 6.60, 6.70, 6.80, 6.90, 7.00, 7.10, 7.20, 7.30, 7.40, 7.50, 7.60, 7.70, 7.80, 7.90, 8.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0035] CaO is a component that improves the devitrification resistance and reduces the abrasion resistance of glass, and is an optional component in the glass of this invention. In this invention, by keeping the CaO content below 5.0%, the devitrification resistance of the glass can be improved while suppressing the decrease in the glass's refractive index. Therefore, the CaO content is 0–5.0%, preferably 0–3.0%, and more preferably 0–2.0%. In some embodiments, it is further preferred that the glass does not contain CaO. In some embodiments, the CaO content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0036] SrO can adjust the refractive index and Abbe number of glass, and can also improve the glass's resistance to devitrification, light transmittance, chemical stability, and mechanical properties. However, if its content is too high, the glass's resistance to crystallization deteriorates. Therefore, the SrO content is 0.1% to 10.0%, preferably 0.5% to 8.0%, and more preferably 1.0% to 6.0%. In some embodiments, the SrO content can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0037] In some embodiments, controlling the ratio of Y₂O₃ content to SrO content, Y₂O₃ / SrO, within the range of 0.10 to 5.00 can improve the hardness of the glass while preventing a deterioration in its water resistance. Therefore, a Y₂O₃ / SrO ratio of 0.10 to 5.00 is preferred, more preferably 0.20 to 4.00, even more preferably 0.30 to 2.00, and still more preferably 0.40 to 1.00. In some implementations, the Y₂O₃ / SrO ratio can be 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.75, or 1. 80, 1.85, 1.90, 1.95, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0038] MgO can reduce the relative partial dispersion of glass, but when the MgO content is too high, the refractive index of the glass is difficult to meet the design requirements, and the anti-crystallization performance and stability of the glass decrease. Therefore, the MgO content is 0-5.0%, preferably 0-4.0%, and more preferably 0-2.0%. In some embodiments, it is further preferred that the glass does not contain MgO. In some embodiments, the MgO content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0039] ZnO can increase the refractive index of glass, lower its transition temperature and coefficient of thermal expansion, improve its thermal stability, and enhance its chemical stability. However, if the ZnO content is too high, the glass's abrasion resistance increases, its hardness decreases, and it is detrimental to maintaining the glass's anti-crystallization stability and high transmittance. Therefore, the ZnO content is 2.0–14.5%, preferably 4.0–12.0%, and more preferably 5.0–10.0%. In some embodiments, the ZnO content can be 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0040] In some embodiments, controlling the ratio of ZnO content to La2O3 content (ZnO / La2O3) within the range of 0.30 to 8.00 is beneficial for improving the light transmittance and devitrification resistance of the glass. Therefore, a ZnO / La2O3 ratio of 0.30 to 8.00 is preferred, more preferably 0.50 to 5.00, even more preferably 0.80 to 3.50, and still more preferably 1.00 to 2.50. In some implementations, the ZnO / La2O3 content can be 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, or 3.60. The values ​​are 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.30, 6.50, 6.70, 7.00, 7.10, 7.30, 7.50, 7.70, 8.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0041] In some embodiments, the ratio of the total ZnO and BaO content (ZnO+BaO) to the SiO2 content (ZnO+BaO) / SiO2 is controlled within the range of 0.10 to 0.80. This can reduce the coefficient of thermal expansion of the glass while preventing a deterioration in the Young's modulus. Therefore, it is preferable that (ZnO+BaO) / SiO2 is 0.10 to 0.80, more preferably 0.20 to 0.70, and even more preferably 0.30 to 0.60. In some implementations, (ZnO+BaO) / SiO2 can be 0.10, 0.11, 0.13, 0.15, 0.17, 0.20, 0.21, 0.23, 0.25, 0.27, 0.30, 0.31, 0.33, 0.35, 0.37, 0.40, 0.41, 0.43, 0.45, 0.47, 0.50, 0.51, 0.53, 0.55, 0.57, 0.60, 0.61, 0.63, 0.65, 0.67, 0.70, 0.71, 0.73, 0.75, 0.77, 0.80, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in implementations, any of the above ranges can be combined with any other range.

[0042] Alkali metal oxides Rn₂O (Rn₂O being the total content of Li₂O, Na₂O, and K₂O) can lower the glass transition temperature, adjust the optical constants and high-temperature viscosity of the glass, and improve the glass's meltability. However, high Rn₂O content reduces the glass's resistance to devitrification and chemical stability. Therefore, the Rn₂O content in this invention is 2.0%–24.0%, preferably 5.0%–20.0%, and more preferably 7.0%–15.0%. In some embodiments, the Rn₂O content can be 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, and 13.5%. 14.0%, 14.5%, 15.0%, 15.5%, 16.0%, 16.5%, 17.0%, 17.5%, 18.0%, 18.5%, 19.0%, 19.5%, 20.0%, 20.5%, 21.0%, 21.5%, 22.0%, 22.5%, 23.0%, 23.5%, 24.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0043] Since alkali metal oxides Li2O, Na2O, and K2O play significantly different roles in glass, their contents in the glass of this invention also vary.

[0044] Li₂O can lower the glass transition temperature, adjust the high-temperature viscosity of glass, and improve the melting properties of glass. However, a high Li₂O content is detrimental to the chemical stability of the glass and the economic efficiency of raw material costs. Therefore, the Li₂O content in this invention is 0–8.0%, preferably greater than 0% but less than or equal to 6.0%, and more preferably 0.1–4.0%. In some embodiments, the Li₂O content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0045] Na₂O can improve the melt flow properties and light transmittance of glass. In this invention, the above-mentioned effects are achieved by containing 2.0% or more Na₂O, preferably 4.0% or more, and more preferably 5.0% or more. However, if the Na₂O content is too high, the coefficient of thermal expansion of the glass increases, and its chemical stability decreases. Therefore, the Na₂O content is 15.0% or less, preferably 12.0% or less, and more preferably 10.0% or less. In some embodiments, the Na₂O content can be 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, 15.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0046] In some embodiments, controlling the ratio of Y₂O₃ content to Na₂O content, Y₂O₃ / Na₂O, within the range of 0.05 to 2.00 is beneficial for improving the acid resistance and weather resistance of the glass. Therefore, a Y₂O₃ / Na₂O ratio of 0.05 to 2.00 is preferred, more preferably 0.08 to 1.50, even more preferably 0.10 to 1.00, and still more preferably 0.10 to 0.70. In some implementations, Y₂O₃ / Na₂O can be 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.75, 1.80, 1.85, 1.90, 1.95, 2.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in implementations, any of the above ranges can be combined with any other range.

[0047] In some embodiments, the content of La2O3 and Na2O, specifically the ratio of La2O3+Na2O to Nb2O5 (La2O3+Na2O) / Nb2O5, is controlled within the range of 0.50 to 7.00. This can improve the hardness of the glass while preventing a deterioration in its water resistance. Therefore, it is preferable that (La2O3+Na2O) / Nb2O5 is 0.50 to 7.00, more preferably 0.80 to 5.00, even more preferably 1.00 to 3.50, and still more preferably 1.10 to 2.00. In some implementations, (La₂O₃+Na₂O) / Nb₂O₅ can be 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, or 3. 40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.30, 6.50, 6.70, 7.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0048] In some embodiments, by controlling the ratio of the total content of La2O3 and BaO (La2O3+BaO) to the content of Na2O (La2O3+BaO) / Na2O within the range of 0.30 to 7.00, the glass transition temperature can be reduced and the bubble count of the glass can be improved. Therefore, it is preferable that (La2O3+BaO) / Na2O is 0.30 to 7.00, more preferably (La2O3+BaO) / Na2O is 0.50 to 5.00, further preferably (La2O3+BaO) / Na2O is 0.80 to 3.00, and even more preferably (La2O3+BaO) / Na2O is 1.00 to 2.50. In some implementations, the ratio of (La₂O₃+BaO) / Na₂O can be 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, or 3.3. 0, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.30, 6.50, 6.70, 7.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0049] In some embodiments, the ratio of the total content of Nb2O5, Na2O, La2O3, and Y2O3 (Nb2O5+Na2O+La2O3+Y2O3) to the total content of BaO and CaO (BaO+CaO) (Nb2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is controlled within the range of 1.00 to 9.00, which can increase the hardness of the glass while reducing its density. Therefore, the preferred ratio of (Nb2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is 1.00 to 9.00, more preferably (Nb2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is 2.00 to 7.50, even more preferably (Nb2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is 2.50 to 6.00, and even more preferably (Nb2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is 3.20 to 4.80. In some implementations, (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) can be 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, or 4. The values ​​are 00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.30, 6.50, 6.70, 7.00, 7.10, 7.30, 7.50, 7.70, 8.00, 8.10, 8.30, 8.50, 8.70, 9.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0050] K₂O improves the thermal stability and melt properties of glass, but if its content is too high, the glass's resistance to devitrification and chemical stability deteriorates. Therefore, the K₂O content in this invention is 0–8.0%, preferably 0.1–6.0%, and more preferably 0.5–4.5%. In some embodiments, the K2O content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0051] In some embodiments, controlling the ratio of the total content of Li2O and K2O (Li2O+K2O) to the content of Al2O3 (Li2O+K2O) / Al2O3 within the range of 0.20 to 5.00 is beneficial for reducing the density of the glass and improving its weather resistance. Therefore, it is preferable that (Li2O+K2O) / Al2O3 is 0.20 to 5.00, more preferably 0.50 to 3.50, further preferably 0.80 to 3.00, and even more preferably 1.00 to 2.50. In some implementations, the ratio of (Li₂O+K₂O) / Al₂O₃ can be 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, or 2.5. 0, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0052] TiO2 improves the refractive index and dispersion of glass, and its appropriate content can enhance the glass's resistance to crystallization and its chemical stability. In this invention, the above effects are achieved by containing 3.0% or more TiO2, preferably 5.0% or more, and more preferably 7.0% or more. If the TiO2 content is too high, the glass's devitrification resistance decreases, and the visible light transmittance of the glass also decreases. Therefore, in this invention, the TiO2 content is 16.0% or less, preferably 15.0% or less, and more preferably 13.0% or less. In some embodiments, the TiO2 content can be 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, 15.0%, 15.5%, 16.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0053] In some embodiments, controlling the ratio of La2O3 content to TiO2 content (La2O3 / TiO2) within the range of 0.20 to 2.50 can increase the Young's modulus of the glass while lowering its transition temperature. Therefore, a La2O3 / TiO2 ratio of 0.20 to 2.50 is preferred, more preferably 0.20 to 2.00, even more preferably 0.30 to 1.50, and still more preferably 0.30 to 1.00. In some implementations, the La2O3 / TiO2 ratio can be 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1 0.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.75, 1.80, 1.85, 1.90, 1.95, 2.00, 2.05, 2.10, 2.15, 2.20, 2.25, 2.30, 2.35, 2.40, 2.45, 2.50, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0054] In some embodiments, the ratio (Nb2O5+ZrO2) / (ZnO+TiO2) between the total content of Nb2O5 and ZrO2 (Nb2O5+ZrO2) and the total content of ZnO and TiO2 (ZnO+TiO2) is controlled within the range of 0.30 to 3.00. This can reduce the glass density while preventing the glass's weather resistance from deteriorating. Therefore, it is preferable that (Nb2O5+ZrO2) / (ZnO+TiO2) is 0.30 to 3.00, more preferably 0.35 to 2.00, even more preferably 0.40 to 1.40, and even more preferably 0.50 to 1.00. In some implementations, (Nb₂O₅+ZrO₂) / (ZnO+TiO₂) can be 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, or 1.55. The ranges are 1.60, 1.65, 1.70, 1.75, 1.80, 1.85, 1.90, 1.95, 2.00, 2.05, 2.10, 2.15, 2.20, 2.25, 2.30, 2.35, 2.40, 2.45, 2.50, 2.55, 2.60, 2.65, 2.70, 2.75, 2.80, 2.85, 2.90, 2.95, 3.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0055] In some embodiments, by controlling the ratio (Nb2O5+TiO2+CaO) / SiO2 between the total content of Nb2O5, TiO2, and CaO (Nb2O5+TiO2+CaO) and the content of SiO2 (Nb2O5+TiO2+CaO) / SiO2 within the range of 0.15 to 1.00, the weather resistance of the glass can be improved while preventing a deterioration in the Young's modulus. Therefore, it is preferable that (Nb2O5+TiO2+CaO) / SiO2 is 0.15 to 1.00, more preferably (Nb2O5+TiO2+CaO) / SiO2 is 0.20 to 0.80, and even more preferably (Nb2O5+TiO2+CaO) / SiO2 is 0.30 to 0.70. In some embodiments, the ratio of (Nb₂O₅+TiO₂+CaO) / SiO₂ can be 0.15, 0.17, 0.19, 0.20, 0.21, 0.23, 0.25, 0.27, 0.29, 0.30, 0.31, 0.33, 0.35, 0.37, 0.39, 0.40, 0.41, 0.43, 0.45, 0.47, 0.49, 0.50, 0.51, 0.53, or 0.5. 5, 0.57, 0.59, 0.60, 0.61, 0.63, 0.65, 0.67, 0.69, 0.70, 0.71, 0.73, 0.75, 0.77, 0.79, 0.80, 0.81, 0.83, 0.85, 0.87, 0.89, 0.90, 0.91, 0.93, 0.95, 0.97, 0.99, 1.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0056] An appropriate amount of P2O5 can improve the thermal stability of glass and lower the melting temperature of glass raw materials, but if its content is too high, the glass's resistance to devitrification will deteriorate. Therefore, the P2O5 content is 0-5.0%, preferably 0-3.0%, and more preferably greater than 0% but less than or equal to 2.0%. In some embodiments, the P2O5 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0057] In some embodiments, controlling the 5×P2O5 / Al2O3 ratio within the range of 0.10 to 6.00 is beneficial for improving the bubble count of the glass and preventing a decrease in its acid resistance. Therefore, it is preferable that the 5×P2O5 / Al2O3 ratio is 0.10 to 6.00, more preferably 0.20 to 3.50, even more preferably 0.30 to 2.50, and still more preferably 0.50 to 1.50. In some implementations, 5×P2O5 / Al2O3 can be 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, or 3. 00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0058] WO3 can improve the refractive index and dispersion of glass. If the WO3 content exceeds 3.0%, the thermal stability and devitrification resistance of the glass decrease. Therefore, the WO3 content is 0-3.0%, preferably 0-2.0%, and more preferably 0-1.0%. In some embodiments, it is further preferred that the glass does not contain WO3. In some embodiments, the WO3 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0059] In this invention, one or more components selected from Sb₂O₃, SnO, SnO₂, and CeO₂, containing 0-1.0% as a clarifying agent, can improve the clarification effect of glass and increase its bubble level. Preferably, the content of the clarifying agent is 0-0.5%, more preferably 0-0.2%. When the Sb₂O₃ content exceeds 1.0%, the glass tends to have reduced clarification performance. Simultaneously, its strong oxidizing effect promotes the corrosion of platinum or platinum alloy vessels used in glassmaking and the deterioration of the forming molds. Therefore, in this invention, the Sb₂O₃ content is preferably 0-1.0%, more preferably 0-0.5%, and even more preferably 0-0.2%. In some embodiments, the Sb₂O₃ content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range. SnO and SnO₂ can also be used as clarifying agents, but when their content exceeds 1.0%, the tendency for glass coloring increases, or when the glass is heated, softened, and re-formed such as by molding, Sn can become the starting point for crystal nucleation, resulting in a tendency for devitrification. Therefore, the SnO2 content of the present invention is preferably 0-1.0%, more preferably 0-0.5%, and even more preferably 0-0.2%; the SnO content is preferably 0-1.0%, more preferably 0-0.5%, and even more preferably 0-0.2%. In some embodiments, the SnO content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range. In some embodiments, the SnO2 content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.The role and content ratio of CeO2 are consistent with those of SnO2, and its content is preferably 0-1.0%, more preferably 0-0.5%, further preferably 0-0.2%, and even more preferably free of CeO2. In some embodiments, the content of CeO2 can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0060] <Components that should not be present>

[0061] In the glass of this invention, even if oxides of transition metals such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag, and Mo are contained in small amounts, either alone or in combination, the glass will be colored and absorb at specific wavelengths in the visible light region, thereby weakening the property of this invention to improve visible light transmittance. Therefore, it is preferable that the glass does not contain these oxides, especially for optical glass where transmittance in the visible light region is required.

[0062] Oxides of Th, Cd, Tl, Os, Be, and Se have been increasingly subject to controlled use in recent years due to their status as hazardous chemicals. Environmental protection measures are essential not only in glass manufacturing but also in processing and post-product disposal. Therefore, given the importance of environmental impact, it is preferable to avoid the presence of these substances, except where their contamination is unavoidable. As a result, the optical glass becomes virtually free of pollutants. Therefore, the optical glass of this invention can be manufactured, processed, and disposed of even without special environmental countermeasures.

[0063] To achieve environmental friendliness, the optical glass of the present invention preferably does not contain As2O3 and PbO.

[0064] The terms "not containing" and "0%" as used herein mean that the compound, molecule, or element was not intentionally added to the optical glass of this invention as a raw material. However, as raw materials and / or equipment used in the production of optical glass, there may be some unintentionally added impurities or components that are present in small or trace amounts in the final optical glass. Such cases are also within the scope of protection of this patent.

[0065] The performance of the optical glass of the present invention will now be described.

[0066] <Refractive Index and Abbe Number>

[0067] The refractive index (n) of optical glassd ) and Abbe number (ν d Test according to the method specified in the national standard GB / T 7962.1-2010.

[0068] In some embodiments, the refractive index (n) of the optical glass of the present invention d The lower limit for the refractive index (n) is 1.665, preferably 1.670, and more preferably 1.680. In some embodiments, the refractive index (n) of the optical glass of the present invention is... d The upper limit for the refractive index (n) is 1.735, preferably 1.730, and more preferably 1.710. In some embodiments, the refractive index (n) is... d The possible values ​​are 1.665, 1.667, 1.669, 1.670, 1.671, 1.673, 1.675, 1.677, 1.679, 1.680, 1.681, 1.683, 1.685, 1.687, 1.689, 1.690, 1.691, 1.693, 1.695, 1.697, 1.699, 1.700, and 1.70. 1, 1.703, 1.705, 1.707, 1.709, 1.710, 1.711, 1.713, 1.715, 1.717, 1.719, 1.720, 1.721, 1.723, 1.725, 1.727, 1.729, 1.730, 1.731, 1.733, 1.735, etc., as well as all ranges and subranges between the above values.

[0069] In some embodiments, the Abbe number (ν) of the optical glass of the present invention d The lower limit for the Abbe number (ν) is 31.50, preferably 32.00, and more preferably 34.00. In some embodiments, the Abbe number (ν) of the optical glass of the present invention is... d The upper limit for the Abbe number is 37.50, preferably 37.00, and more preferably 36.50. In some embodiments, the Abbe number (ν) is... d The range can be 31.50, 31.70, 31.90, 32.00, 32.10, 32.30, 32.50, 32.70, 32.90, 33.00, 33.10, 33.30, 33.50, 33.70, 33.90, 34.00, 34.10, 34.30, 34.50, 34.70, 34.90, 35.00, 35.10, 35.30, 35.50, 35.70, 35.90, 36.00, 36.10, 36.30, 36.50, 36.70, 36.90, 37.00, 37.10, 37.30, 37.50, etc., as well as all ranges and subranges between the above values.

[0070] <Density>

[0071] The density (ρ) of optical glass was tested according to the method specified in the national standard GB / T7962.20-2010.

[0072] In some embodiments, the density (ρ) of the optical glass of the present invention is 3.60 g / cm³. 3 The preferred value is 3.50 g / cm³. 3 The preferred value is 3.40 g / cm³. 3 Below. In some embodiments, the density (ρ) can be 3.60 g / cm³. 3 3.59g / cm 3 3.58g / cm 3 3.57g / cm 3 3.56g / cm 3 3.55g / cm 3 3.54g / cm 3 3.53g / cm 3 3.52g / cm 3 3.51g / cm 3 3.50g / cm 3 3.49 g / cm 3 3.48 g / cm 3 3.47 g / cm 3 3.46 g / cm 3 3.45g / cm 3 3.44 g / cm 3 3.43 g / cm 3 3.42 g / cm 3 3.41 g / cm 3 3.40 g / cm 3 3.39 g / cm 3 3.38g / cm 3 3.37 g / cm 3 3.36 g / cm 3 3.35g / cm 3 3.34 g / cm 3 3.33 g / cm 3 3.32g / cm 3 3.31 g / cm 3 3.30g / cm 3 3.29 g / cm 3 3.28g / cm 3 3.27 g / cm 3 3.26 g / cm 3 3.25g / cm3 And so on, as well as all ranges and subranges between the above values.

[0073] <Coefficient of thermal expansion>

[0074] The coefficient of thermal expansion of optical glass (α) -30 / 70℃ Data for -30 to 70℃ were tested according to the method specified in the national standard GB / T7962.16-2010.

[0075] In some embodiments, the coefficient of thermal expansion (α) of the optical glass of the present invention is... -30 / 70℃ ) is 90×10 -7 / K or less, preferably 80×10 -7 / K or less, preferably 75×10 -7 / K or below. In some embodiments, the coefficient of thermal expansion (α) -30 / 70℃ It can be 65×10 -7 / K、66×10 -7 / K、67×10 -7 / K、68×10 -7 / K、69×10 -7 / K、70×10 -7 / K、71×10 -7 / K、72×10 -7 / K、73×10 -7 / K、74×10 -7 / K、75×10 -7 / K、76×10 -7 / K、77×10 -7 / K、78×10 -7 / K、79×10 -7 / K、80×10 -7 / K、81×10 -7 / K、82×10 -7 / K、83×10 -7 / K、84×10 -7 / K、85×10 -7 / K、86×10 -7 / K、87×10 -7 / K、88×10 -7 / K、89×10 -7 / K、90×10 -7 / K, etc., and all ranges and subranges between the above values.

[0076] <Stability under water resistance>

[0077] Water resistance stability of optical glass (D) W(Powder method) Tested according to the method specified in the national standard GB / T 17129. In this invention, the stability of water resistance can be simply referred to as water resistance.

[0078] In some embodiments, the water resistance stability (D) of the optical glass of the present invention is... W There are two or more categories, with category 1 being preferred.

[0079] <Stability under acid conditions>

[0080] Acid resistance stability of optical glass (D) A (Powder method) Tested according to the method specified in the national standard GB / T 17129. In this invention, the stability against acid can be simply referred to as acid resistance.

[0081] In some embodiments, the acid resistance stability (D) of the optical glass of the present invention is... A There are two or more categories, with category 1 being preferred.

[0082] <Weather resistance>

[0083] The weather resistance (CR) test method for optical glass is as follows: The sample is placed in a test chamber with a relative humidity of 90% saturated water vapor, and the temperature is alternately cyclical every 1 hour at 40–50°C, for 15 cycles. Weather resistance is classified according to the change in turbidity before and after the sample placement. The weather resistance classification is shown in Table 1.

[0084] Table 1. Weather Resistance Classification Table

[0085]

[0086] In some embodiments, the weather resistance (CR) of the optical glass of the present invention is Class 2 or above, preferably Class 1.

[0087] <Transition Temperature>

[0088] Transition temperature of optical glass (T) g Test according to the method specified in the national standard GB / T7962.16-2010.

[0089] In some embodiments, the transition temperature (T) of the optical glass of the present invention is... g The temperature is 590°C or below, preferably 580°C or below, and more preferably 570°C or below. In some embodiments, the transition temperature (T) is... gThe values ​​can be 550℃, 551℃, 553℃, 555℃, 557℃, 559℃, 560℃, 561℃, 563℃, 565℃, 567℃, 569℃, 570℃, 571℃, 573℃, 575℃, 577℃, 579℃, 580℃, 581℃, 583℃, 585℃, 587℃, 589℃, 590℃, etc., as well as all ranges and subranges between the above values.

[0090] Knoop Hardness

[0091] Knoop hardness (H) of optical glass K The test was conducted according to the test method specified in the national standard GB / T7962.18-2010. In this invention, Knoop hardness can be simply referred to as hardness.

[0092] In some embodiments, the Knoop hardness (H) of the optical glass of the present invention is... K ) is 520×10 7 Pa or higher, preferably 540 × 10 Pa 7 Pa or higher, more preferably 550 × 10 Pa 7 Pa or higher. In some embodiments, the Knoop hardness (H) is... K ) can be 520×10 7 Pa, 525×10 7 Pa, 530×10 7 Pa, 535×10 7 Pa, 540×10 7 Pa, 545×10 7 Pa, 550×10 7 Pa, 555×10 7 Pa, 560×10 7 Pa, 565×10 7 Pa, 570×10 7 Pa, 575×10 7 Pa, etc., and all ranges and subranges between the above values.

[0093] Young's Modulus

[0094] Young's modulus (E) is obtained by ultrasonic testing of its longitudinal and transverse wave velocities, and then calculated using the following formula.

[0095]

[0096]

[0097] In the formula: E is Young's modulus, Pa;

[0098] G is the shear modulus, Pa;

[0099] V T The transverse wave velocity is in m / s;

[0100] V S The longitudinal wave velocity is given in m / s.

[0101] ρ is the density of glass, in g / cm³ 3 .

[0102] In some embodiments, the Young's modulus (E) of the optical glass of the present invention is 8500 × 10⁻⁶. 7 Pa or higher, preferably 9000×10 Pa 7 Pa or higher, more preferably 9200 × 10 Pa. 7 Pa or higher. In some embodiments, Young's modulus (E) can be 8500 × 10⁻⁶. 7 Pa, 8600×10 7 Pa, 8700×10 7 Pa, 8800×10 7 Pa, 8900×10 7 Pa, 9000×10 7 Pa, 9100×10 7 Pa, 9200×10 7 Pa, 9300×10 7 Pa, 9400×10 7 Pa, 9500×10 7 Pa, 9600×10 7 Pa, 9700×10 7 Pa, etc., and all ranges and subranges between the above values.

[0103] <shading>

[0104] The short-wavelength transmission spectral characteristics of the glass of this invention are expressed using colorimetry (λ). 80 And λ5) represent. λ 80 This refers to the wavelength corresponding to a glass transmittance of 80%. λ 80 The measurement was performed using a glass with a thickness of 10 ± 0.1 mm and two optically polished, parallel planes. The spectral transmittance was measured in the wavelength range from 280 nm to 700 nm, and wavelengths exhibiting 80% transmittance were recorded. Spectroscopic transmittance, or transmittance, is the value of the light incident perpendicularly to the aforementioned surface of the glass with an intensity I... in Light passes through the glass and exits from a plane with an intensity of I. out In the case of light, through I out / I in The value represents the transmittance, which also includes the surface reflection loss on the aforementioned surfaces of the glass. The higher the refractive index of the glass, the greater the surface reflection loss. Therefore, in glass, λ...80 A low value means that the glass itself has very little coloration and high light transmittance.

[0105] In some embodiments, the λ of the optical glass of the present invention 80 For wavelengths below 425nm, λ is preferred. 80 For wavelengths below 415nm, λ is preferred. 80 The wavelength is below 410 nm. In some embodiments, the λ of the optical glass... 80 It can be 390nm, 391nm, 392nm, 393nm, 394nm, 395nm, 396nm, 397nm, 398nm, 399nm, 400nm, 401nm, 402nm, 403nm, 404nm, 405nm, 406nm, 407nm, 408nm, 409nm, 410nm, 411nm, 412nm, 413nm, 414nm, 415nm, 416nm, 417nm, 418nm, 419nm, 420nm, 421nm, 422nm, 423nm, 424nm, 425nm, etc., as well as all ranges and subranges between the above values.

[0106] In some embodiments, the λ5 of the optical glass of the present invention is 375 nm or less, preferably 365 nm or less, and more preferably 360 nm or less. In some embodiments, the λ5 of the optical glass can be 340 nm, 341 nm, 342 nm, 343 nm, 344 nm, 345 nm, 346 nm, 347 nm, 348 nm, 349 nm, 350 nm, 351 nm, 352 nm, 353 nm, 354 nm, 355 nm, 356 nm, 357 nm, 358 nm, 359 nm, 360 nm, 361 nm, 362 nm, 363 nm, 364 nm, 365 nm, 366 nm, 367 nm, 368 nm, 369 nm, 370 nm, 371 nm, 372 nm, 373 nm, 374 nm, 375 nm, etc., as well as all ranges and sub-ranges between the above values.

[0107] <Effervescence>

[0108] The bubble degree of optical glass is tested according to the method specified in the national standard GB / T7962.8—2010.

[0109] In some embodiments, the bubble degree of the optical glass of the present invention is grade A or above, preferably grade A0 or above, and more preferably grade A. 00 class.

[0110] [Manufacturing methods for optical glass]

[0111] The manufacturing method of the optical glass of this invention is as follows: The glass of this invention is produced using conventional raw materials and processes, including but not limited to oxides, hydroxides, complex salts (such as carbonates, nitrates, sulfates, phosphates, metaphosphates, etc.), boric acid, etc., as raw materials. After being prepared according to conventional methods, the prepared furnace charge is put into a melting furnace (such as a platinum or platinum alloy crucible) at 1200-1400°C for melting. After clarification and homogenization, a homogeneous molten glass without bubbles and undissolved substances is obtained. This molten glass is then cast in a mold and annealed. Those skilled in the art can appropriately select raw materials, process methods, and process parameters according to actual needs.

[0112] [Glass preforms and optical components]

[0113] Glass preforms can be manufactured from the optical glass using methods such as grinding, hot pressing, or precision stamping. Specifically, glass preforms can be manufactured by machining the optical glass, such as grinding and polishing; or by hot pressing a preform made from the optical glass for molding and then grinding it; or by precision stamping a preform made from the ground glass.

[0114] It should be noted that the means of preparing the glass preform are not limited to those described above. As mentioned above, the optical glass of the present invention is useful for various optical elements and optical designs, and it is particularly preferred to form a preform from the optical glass of the present invention, using the preform for hot pressing, precision stamping, etc., to manufacture optical elements such as lenses, prisms, and diffraction gratings.

[0115] Both the glass preform and the optical element of the present invention are formed from the optical glass described above. The glass preform of the present invention possesses the excellent properties of optical glass; the optical element of the present invention possesses the excellent properties of optical glass, and can provide various optical elements such as lenses, prisms, and diffraction gratings with high optical value.

[0116] Examples of lenses include concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, plano-concave lenses, and so on, where the lens surface is spherical or aspherical.

[0117] [Optical Equipment]

[0118] The optical elements formed by the optical glass of this invention can be used to manufacture optical devices such as photographic equipment, portable electronic devices (such as mobile phones, watches, etc.), video cameras, display devices, and monitoring equipment.

[0119] [Example]

[0120] <Example of Optical Glass>

[0121] To further illustrate and explain the technical solution of the present invention, the following non-limiting embodiments are provided.

[0122] In this embodiment, optical glass with the composition shown in Tables 2 to 4 was obtained using the optical glass manufacturing method described above. Furthermore, the properties of each glass were measured using the testing method described in this invention, and the measurement results are shown in Tables 2 to 4.

[0123] Table 2.

[0124]

[0125]

[0126] Table 3.

[0127]

[0128]

[0129]

[0130] Table 4.

[0131]

[0132]

[0133] <Example of Glass Prefabricated Components>

[0134] The glass obtained in the examples of optical glass in Tables 2 to 4 is used, for example, by grinding or by molding such as hot pressing or precision stamping, to produce preforms of various lenses and prisms such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses.

[0135] <Optical Component Examples>

[0136] Annealing these preforms obtained from the above glass preform examples reduces internal stress in the glass while fine-tuning the refractive index, so that optical properties such as the refractive index reach the desired values.

[0137] Next, the prefabricated parts are ground and polished to produce various lenses and prisms, such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses. Anti-reflective coatings can also be applied to the surface of the resulting optical elements.

[0138] <Optical Equipment Examples>

[0139] The optical elements obtained from the above-described optical element embodiments can be used, through optical design, to form optical components or optical assemblies by using one or more optical elements. These components can be used in, for example, imaging devices, sensors, microscopes, medical technology, digital projection, communications, optical communication technology / information transmission, optics / lighting in the automotive field, lithography technology, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices that include such circuits and chips.

Claims

1. Environmentally friendly optical glass, characterized in that, Its composition, expressed as a weight percentage, contains: SiO2: 28.0–42.0%; B2O3: 1.0–9.5%; ZrO2: 1.0–10.0%; Nb2O5: 2.0–14.5%. ZnO: 2.0–14.5%; TiO2: 3.0–16.0%; RO: 2.0–22.0%; Na2O: 2.0–15.0%, wherein RO is the total content of MgO, CaO, SrO, and BaO.

2. The environmentally friendly optical glass according to claim 1, characterized in that, Its components, expressed as a weight percentage, also contain: La2O3: 0–10.0%; and / or Al2O3: 0–8.0%; and / or Y2O3: 0–8.0%; and / or Gd2O3: 0–5.0%; and / or Li2O: 0–8.0%; and / or K2O: 0–8.0%; and / or P2O5: 0–5.0%; and / or WO3: 0–3.0%; and / or clarifying agent: 0–1.0%, wherein the clarifying agent is one or more of Sb2O3, SnO, SnO2, and CeO2.

3. Environmentally friendly optical glass, characterized in that, Its composition, expressed as a weight percentage, is as follows: SiO2: 28.0–42.0%; B2O3: 1.0–9.5%; ZrO2: 1.0–10.0%; Nb2O5: 2.0–14.5%. ZnO: 2.0–14.5%; TiO2: 3.0–16.0%; RO: 2.0–22.0%; Na2O: 2.0–15.0%; La2O3: 0–10.0%; Al2O3: 0–8.0%; Y2O3: 0–8.0%; Gd2O3: 0–5.0%; Li2O: 0–8.0%; K2O: 0–8.0%; P2O5: 0–5.0%; WO3: 0–3.0%; clarifying agent: 0–1.0% composition, wherein RO is the total content of MgO, CaO, SrO, and BaO, and the clarifying agent is one or more of Sb2O3, SnO, SnO2, and CeO2.

4. The environmentally friendly optical glass according to any one of claims 1 to 3, characterized in that, Its components are expressed as weight percentages, wherein: Rn2O: 2.0–24.0%, preferably Rn2O: 5.0–20.0%, more preferably Rn2O: 7.0–15.0%; and / or (La2O3+Na2O) / Nb2O5 is 0.50–7.00, preferably (La2O3+Na2O) / Nb2O5 is 0.80–5.00, more preferably (La2O3+Na2O) / Nb2O5 is 1.00–3.50, and even more preferably (La2O3+Na2O) / Nb2O5 is 1. 0.10–2.00; and / or (La₂O₃+BaO) / Na₂O is 0.30–7.00, preferably (La₂O₃+BaO) / Na₂O is 0.50–5.00, more preferably (La₂O₃+BaO) / Na₂O is 0.80–3.00, even more preferably (La₂O₃+BaO) / Na₂O is 1.00–2.50; and / or Y₂O₃ / Na₂O is 0.05–2.00, preferably Y₂O₃ / Na₂O is 0.08–1.50, more preferably Y₂O₃ / Na₂O is 0.05–2.

00. O is 0.10–1.00, more preferably Y₂O₃ / Na₂O is 0.10–0.70; and / or (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 1.00–9.00, preferably (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 2.00–7.50, more preferably (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 2.50–6.0 ...0.10–1.00, more preferably (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 0.10–0.70, and / or (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 0.10–1.00, more preferably (Nb₂O₅+Na₂O+La₂O₃+Y₂O₃) / (BaO+CaO) is 0.10–0.70, more preferably (Nb₂O₅+ The content of (2O5+Na2O+La2O3+Y2O3) / (BaO+CaO) is 3.20-4.80; and / or (Li2O+K2O) / Al2O3 is 0.20-5.00, preferably (Li2O+K2O) / Al2O3 is 0.50-3.50, more preferably (Li2O+K2O) / Al2O3 is 0.80-3.00, even more preferably (Li2O+K2O) / Al2O3 is 1.00-2.50, and Rn2O is the total content of Li2O, Na2O, and K2O.

5. The environmentally friendly optical glass according to any one of claims 1 to 3, characterized in that, Its components are expressed as weight percentages, wherein: SiO2 / (B2O3+BaO) is 1.50 to 8.00, preferably SiO2 / (B2O3+BaO) is 1.80 to 6.00, more preferably SiO2 / (B2O3+BaO) is 2.00 to 5.50, even more preferably SiO2 / (B2O3+BaO) is 2.80 to 3.80; and / or (ZnO+BaO) / SiO2 is 0.10 to 0.80, preferably (ZnO+BaO) / SiO2 is 0.20 to 0.70, more preferably (ZnO+BaO) / SiO2 is 0.30 to 0.60; And / or (Nb₂O₅+ZrO₂) / (ZnO+TiO₂) is 0.30–3.00, preferably (Nb₂O₅+ZrO₂) / (ZnO+TiO₂) is 0.35–2.00, more preferably (Nb₂O₅+ZrO₂) / (ZnO+TiO₂) is 0.40–1.40, even more preferably (Nb₂O₅+ZrO₂) / (ZnO+TiO₂) is 0.50–1.00; and / or (Nb₂O₅+TiO₂+CaO) / SiO₂ is 0.15–1.00, preferably (Nb₂O₅+TiO₂+CaO) / SiO₂ is 0.

20. ~0.80, more preferably (Nb2O5+TiO2+CaO) / SiO2 is 0.30~0.70; and / or La2O3 / TiO2 is 0.20~2.50, preferably La2O3 / TiO2 is 0.20~2.00, more preferably La2O3 / TiO2 is 0.30~1.50, even more preferably La2O3 / TiO2 is 0.30~1.00; and / or ZnO / La2O3 is 0.30~8.00, preferably ZnO / La2O3 is 0.50~5.00, more preferably ZnO / La2O3 is 0.80~3.50, even more preferably ZnO / La2O3 is 0.80~3.50, even more preferably ZnO / La2O3 is 0.80~3.50, even more preferably ZnO / La2O3 is 0.80~3.50, even more preferably ZnO / La2O3 is 0.80~3.50, even more preferably ZnO / La2O2 ... The nO / La2O3 ratio is 1.00–2.50; and / or the Y2O3 / SrO ratio is 0.10–5.00, preferably 0.20–4.00, more preferably 0.30–2.00, and even more preferably 0.40–1.00; and / or the 5×P2O5 / Al2O3 ratio is 0.10–6.00, preferably 0.20–3.50, more preferably 0.30–2.50, and even more preferably 0.50–1.

50.

6. The environmentally friendly optical glass according to any one of claims 1 to 3, characterized in that, Its components are expressed as weight percentages, wherein: SiO2: 30.5-39.5%, preferably SiO2: 32.0-37.0%; and / or B2O3: 2.0-8.0%, preferably B2O3: 2.5-7.0%; and / or ZrO2: 2.0-8.5%, preferably ZrO2: 3.0-7.0%; and / or La2O3: 1.0-9.0%, preferably La2O3: 3.0-8.0%; and / or Nb2O5: 4.0-12%. 0%, preferably Nb2O5: 5.0–10.0%; and / or ZnO: 4.0–12.0%, preferably ZnO: 5.0–10.0%; and / or TiO2: 5.0–15.0%, preferably TiO2: 7.0–13.0%; and / or RO: 3.0–18.0%, preferably RO: 5.0–15.0%; and / or Li2O: greater than 0% but less than or equal to 6.0%, preferably Li2O: 0.1–4.0%; and / or Na2O: 4.0–12.0%, preferably Na2O: 5.0–10.0%; and / or K2O: 0.1–6.0%, preferably K2O: 0.5–4.5%; and / or Al2O3: 0.1–6.0%, preferably Al2O3: 0.5–4.0%; and / or Y2O3: greater than 0% but less than or equal to 6.0%, preferably Y2O3: 0.1–4.0%; and / or Gd2O3: 0–3.0%, preferably Gd2O3: 0–1.0%, more preferably... It contains no Gd2O3; and / or P2O5: 0-3.0%, preferably P2O5: greater than 0% but less than or equal to 2.0%; and / or WO3: 0-2.0%, preferably WO3: 0-1.0%, more preferably WO3-free; and / or clarifying agent: 0-0.5%, preferably clarifying agent: 0-0.2%, wherein RO is the total content of MgO, CaO, SrO, and BaO, and the clarifying agent is one or more of Sb2O3, SnO, SnO2, and CeO2.

7. The environmentally friendly optical glass according to any one of claims 1 to 3, characterized in that, Its components are expressed as weight percentages, wherein: BaO: 1.0-12.0%, preferably BaO: 2.0-10.0%, more preferably BaO: 3.0-8.0%; and / or SrO: 0.1-10.0%, preferably SrO: 0.5-8.0%, more preferably SrO: 1.0-6.0%; and / or CaO: 0-5.0%, preferably CaO: 0-3.0%, more preferably CaO: 0-2.0%, and further preferably does not contain CaO; and / or MgO: 0-5.0%, preferably MgO: 0-4.0%, more preferably MgO: 0-2.0%, and further preferably does not contain MgO.

8. The environmentally friendly optical glass according to any one of claims 1 to 3, characterized in that, The refractive index n of the environmentally friendly optical glass d The Abbe number v is 1.665–1.735, preferably 1.670–1.730, more preferably 1.680–1.

710. d The value is 31.50 to 37.50, preferably 32.00 to 37.00, and more preferably 34.00 to 36.

50.

9. The environmentally friendly optical glass according to any one of claims 1 to 3, characterized in that, The density ρ of the environmentally friendly optical glass is 3.60 g / cm³. 3 The preferred value is 3.50 g / cm³. 3 The preferred value is 3.40 g / cm³. 3 The following are required: and / or weather resistance (CR) is Class 2 or above, preferably Class 1; and / or water resistance stability (D). W It is classified as Class 2 or above, preferably Class 1; and / or acid resistance stability D A It is of two or more classes, preferably of one class; and / or the coefficient of thermal expansion α -30 / 70℃ 90×10 -7 / K or less, preferably 80×10 -7 / K or less, preferably 75×10 -7 Below / K; and / or transition temperature T g Temperature is below 590°C, preferably below 580°C, and more preferably below 570°C; and / or Knoop hardness H K 520×10 7 Pa or higher, preferably 540 × 10 Pa 7 Pa or higher, more preferably 550 × 10 Pa 7 Pa or above; and / or Young's modulus E is 8500 × 10⁻⁶. 7 Pa or higher, preferably 9000×10 Pa 7 Pa or higher, more preferably 9200 × 10 Pa. 7 Pa or above; and / or λ 80 For wavelengths below 425nm, λ is preferred. 80 For wavelengths below 415nm, λ is preferred. 80 The wavelength is 410 nm or less; and / or λ5 is 375 nm or less, preferably 365 nm or less, more preferably 360 nm or less; and / or the bubble density is A grade or higher, preferably A0 grade or higher, more preferably A. 00 class.

10. A glass preform, characterized in that, It is made of the environmentally friendly optical glass described in any one of claims 1 to 9.

11. An optical element, characterized in that, It is made of the environmentally friendly optical glass as described in any one of claims 1 to 9, or of the glass preform as described in claim 10.

12. An optical device, characterized in that, It contains the environmentally friendly optical glass as described in any one of claims 1 to 9, and / or contains the optical element as described in claim 11.

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