Optical glass, optical elements, and optical instruments

Abstract

The present invention provides an optical glass, the composition of which, expressed as weight percentage, contains SiO2: 20% to 45%, B2O3: 18% to 38%, Nb2O5: 5% to 25%, ZrO2: 2% to 20%, and Na2O: 1% to 15%. By rationally designing the composition, it is possible to obtain optical glass having the desired refractive index and Abbe number of the present invention at low cost, and the glass of the present invention has low relative partial dispersion P g,F and negative anomalous dispersion, which meets the application of high-end optoelectronic products.

Claims

1. When the composition is expressed as a percentage by weight, SiO ２ :20%~45%, B ２ O ３ :21%~30%, Nb ２ O ５ :5% to 25%, ZrO ２ :5.5%~20%, Na ２ It contains O: 1% to 15%, CaO: 0.5% to 4.6%, BaO: 0% to 5%, and K₂O: 0.5% to 10%. An optical glass characterized by having a CaO / K₂O ratio of 0.1 to 5.

0.

2. When the composition is expressed in weight percentage, MgO: 0 to 5%, and / or SrO: 0 to 5%, and / or Li ２ O: 0 to 5%, and / or WO ３ : 0 to 5%, and / or Ta ２ O ５ : 0 to 12%, and / or TiO ２ : 0 to 5%, and / or ZnO: 0 to 5%, and / or Ln ２ O ３ : 0 to 5%, and / or Al ２ O ３ : 0 to 5%, and / or GeO ２ : 0 to 5%, and / or clarifying agent: 0 to 1% is further contained, and the Ln ２ O ３ is one or more of La ２ O ３ , Gd ２ O ３ , Y ２ O ３ , Yb ２ O ３ , Lu ２ O ３ among others, and the clarifying agent is one or more of Sb ２ O ３ , SnO, SnO ２ , CeO ２ among others, provided that The optical glass described in claim 1, characterized by its features.

3. When the composition is expressed as a percentage by weight, SiO ２ :20%~45%, B ２ O ３ :21%~30%, Nb ２ O ５ :5% to 25%, ZrO ２ :5.5%~20%, Na ２ O: 1% to 15%, MgO: 0 to 5%, CaO: 0.5% to 4.6%, SrO: 0 to 5%, BaO: 0 to 5%, Li ２ O: 0-5%, K ２ O: 0.5% to 10%, WO ３ : 0-5%, Ta ２ O ５ :0~12%, TiO ２ :0~5%, ZnO:0~5%, Ln ２ O ３ : 0-5%, Al ２ O ３ : 0-5%, GeO ２ Ln ２ O ３ La ２ O ３ , Gd ２ O ３ , Y ２ O ３ Yb ２ O ３ Lu ２ O ３ It is one or more of the following, and the clarifying agent is Sb ２ O ３ SnO, SnO ２ , CEO ２ It is one or more of the following: An optical glass characterized by having a CaO / K₂O ratio of 0.1 to 5.

0.

4. When the composition is expressed as a percentage by weight, 1) B ２ O ３ / SiO ２ The value is between 0.51 and 1.

6. 2) Nb ２ O ５ / B ２ O ３ The value must be between 0.15 and 1.

0. 3) B ２ O ３ / (Nb ２ O ５ +ZrO ２ ) is between 0.5 and 2.

5. 4) CaO / ZrO ２ The value must be 2.0 or less. 5) (SiO ２ (+BaO) / B ２ O ３ The value must be between 0.6 and 2.

0. 6) (Nb ２ O ５ +Na ２ (O + BaO) / B ２ O ３ The value must be between 0.5 and 1.

5. 7) (CaO + K ２ O) / SiO ２ is 0.05 to 0.8, 8) (Li ２ O + Na ２ O+K ２ O) / B ２ O ３ The optical glass according to any one of claims 1 to 3, characterized in that it satisfies one or more of the eight conditions, such that the value is between 0.1 and 1.

5.

5. When the composition is expressed as a percentage by weight, 1) B ２ O ３ / SiO ２ is 0.7 to 1.2, 2) Nb ２ O ５ / B ２ O ３ The value is between 0.3 and 0.

8. 3) B ２ O ３ / (Nb ２ O ５ +ZrO ２ ) is between 0.6 and 2.

0. 4) CaO / ZrO ２ The value must be between 0.05 and 1.

5. 5) (SiO ２ (+BaO) / B ２ O ３ The value must be between 0.8 and 1.

6. 6) (Nb ２ O ５ +Na ２ (O + BaO) / B ２ O ３ The value must be between 0.65 and 0.

95. 7) CaO / K ２ O is between 0.3 and 3.

0. 8) (CaO + K ２ O) / SiO ２ The value must be between 0.1 and 0.

5. 9) (Li ２ O + Na ２ O+K ２ O) / B ２ O ３ The optical glass according to any one of claims 1 to 3, characterized in that it satisfies one or more of the nine conditions, such that the ratio is between 0.2 and 0.

9.

6. When the composition is expressed as a percentage by weight, 1) B ２ O ３ / SiO ２ The value must be between 0.75 and 1.

0. 2) Nb ２ O ５ / B ２ O ３ The value is between 0.4 and 0.

7. 3) B ２ O ３ / (Nb ２ O ５ +ZrO ２ ) is between 0.8 and 1.

3. 4) CaO / ZrO ２ The value must be between 0.1 and 0.

8. 5) (SiO ２ (+BaO) / B ２ O ３ The value must be between 1.0 and 1.

5. 6) (Nb ２ O ５ +Na ２ (O + BaO) / B ２ O ３ The value is between 0.7 and 0.

9. 7) CaO / K ２ O is between 0.8 and 2.

0. 8) (CaO + K ２ O) / SiO ２ The value must be between 0.1 and 0.

4. 9) (Li ２ O + Na ２ O+K ２ O) / B ２ O ３ The optical glass according to any one of claims 1 to 3, characterized in that it satisfies one or more of the nine conditions, such that the ratio is between 0.25 and 0.

7.

7. When the composition is expressed as a percentage by weight, SiO ２ : 25% to 40%, and / or Nb ２ O ５ : 8% to 20%, and / or ZrO ２ : 5.5% to 18%, and / or Na ２ O: 3% to 13%, and / or MgO: 0% to 2%, and / or SrO: 0% to 2%, and / or BaO: 0% to 3%, and / or Li ２ O: 0-3%, and / or K ２ O: 0.5% to 8%, and / or WO ３ : 0-3%, and / or Ta ２ O ５ : 0-5%, and / or TiO ２ : 0-1%, and / or ZnO: 0-3%, and / or Ln ２ O ３ : 0-3%, and / or Al ２ O ３ : 0-3%, and / or GeO ２ : 0-3%, and / or clarifying agent: 0-0.8%, Ln ２ O ３ La ２ O ３ , Gd ２ O ３ , Y ２ O ３ Yb ２ O ３ Lu ２ O ３ It is one or more of the following, and the clarifying agent is Sb ２ O ３ SnO, SnO ２ , CEO ２ The optical glass according to any one of claims 1 to 3, characterized in that it is one or more of the types found therein.

8. When the composition is expressed as a percentage by weight, SiO ２ : 28% to 38%, and / or B ２ O ３ : 23% to 30%, and / or Nb ２ O ５ : 10% to 18%, and / or ZrO ２ : 7% to 15%, and / or Na ２ O: 5% to 12%, and / or MgO: 0% to 1%, and / or CaO: 1% to 4.6%, and / or SrO: 0% to 1%, and / or BaO: 0% to 2%, and / or Li ２ O: 0-2%, and / or K ２ O: 1% to 6%, and / or WO ３ : 0-1%, and / or Ta ２ O ５ : 0-1%, and / or ZnO: 0-1%, and / or Ln ２ O ３ : 0-1%, and / or Al ２ O ３ : 0-1%, and / or GeO ２ : 0-1%, and / or clarifying agent: 0-0.5%, Ln ２ O ３ La ２ O ３ , Gd ２ O ３ , Y ２ O ３ Yb ２ O ３ Lu ２ O ３ It is one or more of the following, and the clarifying agent is Sb ２ O ３ SnO, SnO ２ , CEO ２ The optical glass according to any one of claims 1 to 3, characterized in that it is one or more of the types found therein.

9. Composition is TiO ２ Does not contain and / or WO ３ It does not contain and / or Ta ２ O ５ It does not contain and / or GeO ２ It does not contain and / or does not contain ZnO and / or Ln ２ O ３ It does not contain and / or Al ２ O ３ It does not contain the above Ln ２ O ３ La ２ O ３ , Gd ２ O ３ , Y ２ O ３ Yb ２ O ３ Lu ２ O ３ The optical glass according to any one of claims 1 to 3, characterized in that it includes one or more of the following types.

10. The refractive index n of the optical glass ｄ is 1.56 to 1.66, and / or Abbe number v ｄ The relative partial dispersion P of the optical glass is 40 to 48. ｇ，Ｆ The value is 0.7000 or less, and / or the relative partial variance deviation ΔP ｇ，Ｆ The density is -0.0040 or less, and / or the density ρ of the optical glass is 3.0 g / cm³. ３ The following and / or the coefficient of thermal expansion α １００／３００℃ 95 x 10 －７ The temperature is less than or equal to / K, and / or the transition temperature is T ｇ The temperature is 560°C or lower, and / or λ ８０ The wavelength is 390 nm or less, and / or λ ５ The wavelength is 350 nm or less, and / or the weather resistance CR is class 2 or higher, and / or the Knoop hardness H Ｋ 450 x 10 ７ Pa or greater, and / or wear degree F Ａ The optical glass according to any one of claims 1 to 3, characterized in that the value is 80 to 130.

11. The refractive index n of the optical glass ｄ The value is 1.60 to 1.64, and / or the Abbe number v ｄ The ratio is 42 to 46, and / or the relative partial dispersion P of the optical glass. ｇ，Ｆ is 0.6000 or less, and / or the relative partial variance deviation ΔP ｇ，Ｆ The density is -0.0065 or less, and / or the density ρ of the optical glass is 2.85 g / cm³. ３ The following and / or the coefficient of thermal expansion α １００／３００℃ 85 x 10 －７ The temperature is less than or equal to / K, and / or the transition temperature is T ｇ The temperature is 540°C or lower, and / or λ ８０ The wavelength is 370 nm or less, and / or λ ５ The wavelength is 330 nm or less, and / or the weather resistance CR is Class 1, and / or the Knoop hardness is H Ｋ 500 x 10 ７ Pa or greater, and / or wear degree F Ａ The optical glass according to any one of claims 1 to 3, characterized in that the value is 95 to 115.

12. A glass preform characterized by being manufactured from the optical glass described in any one of claims 1 to 3.

13. An optical element characterized by being manufactured from the glass preform described in claim 12.

14. An optical device characterized by containing the optical element described in claim 13.

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