TWI805187B - Optical glass, glass preforms, optical components and optical instruments - Google Patents

Abstract

The invention provides an optical glass. The components of the optical glass are represented by mole percentage, and the cations include: P ⁵⁺ : 26-45%; Al ³⁺ : 5-25%; R ²⁺ : 28-60%; The anion contains F ^- and O ^2- , wherein: F ^- + O ^{2 -} is more than 98%, (P ⁵⁺ +Al ³⁺ )/F ^- is 0.9~4.0, and the R ²⁺ is Ba ²⁺ , Sr The total content of ²⁺ , Ca ²⁺ and Mg ²⁺ . Through reasonable component design, the optical glass obtained by the present invention has a lower ΔP _C,s value and ΔP _C,t value while having a desired refractive index and Abbe number, and has excellent weather resistance.

Description

Optical glass, glass preforms, optical components and optical instruments

The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.57-1.66 and an Abbe number of 56-65, as well as glass preforms, optical elements and optical instruments made thereof.

In recent years, optical lenses have been widely used in the fields of vehicle imaging, monitoring security, etc. During nighttime imaging, the lens absorbs near-infrared light in black and white mode at night, and near-infrared light and visible light are focused at different focal lengths when passing through the lens , resulting in the deterioration of imaging quality, which has become a difficult problem in optical design in the fields of vehicle imaging, surveillance security, and even telescopes and gun scopes.

The refractive index of glass decreases with the increase of wavelength. Generally speaking, the available wavelength range of near-infrared auxiliary lighting at night for camera systems using visible light image sensors is about 800-1000nm. Studies have found that at this wavelength Within the range, if the refractive index of the glass decreases less than normal glass with the increase of the wavelength, that is, the glass forms a certain abnormal dispersion in the near-infrared band, which can greatly reduce the difficulty of optical design to achieve day and night confocal, and effectively improve Night imaging quality, the abnormal dispersion of the near-infrared band is characterized by ΔP _C,s and ΔP _C,t values.

Optical glass with a refractive index of 1.57-1.66 and an Abbe number of 56-65 has a moderate refractive index and Abbe number, and is widely used in various imaging systems. In the prior art, the values of ΔP _C,s and ΔP _C,t of the optical glass whose refractive index and Abbe number are within this range are relatively large, which cannot meet the development needs of new imaging optical equipment, as disclosed in Chinese patent application number 200780019054.0 An optical glass with a refractive index of 1.55-1.65 and an Abbe number of 55-65.

On the other hand, optical systems that need to achieve day and night confocal usually need to work in harsh environments, and optical materials need to have better weather resistance to ensure the reliability of the optical system. Therefore, the development of an optical glass with lower ΔP _C,s and ΔP _C,t values and excellent weather resistance plays an important role in the development of the field of optoelectronic information.

The technical problem to be solved by the present invention is to provide an optical glass with lower ΔP _C,s value and ΔP _C,t value and excellent weather resistance.

The technical scheme that the present invention solves technical problem adopts is:

(1) An optical glass, the composition of which is expressed in molar percentages. The cation contains: P ⁵⁺ : 26-45%; Al ³⁺ : 5-25%; R ²⁺ : 28-60%; the anion contains F ^- and O ^2- , wherein: F ^- +O ^2- is more than 98%, (P ⁵⁺ +Al ³⁺ )/F ^- is 0.9 to 4.0, and the R ²⁺ is Ba ²⁺ , Sr ²⁺ , Ca ²⁺ and the total content of Mg ²⁺ .

(2) The optical glass according to (1), the composition of which is expressed in molar percentage, and the cations also contain: La ³⁺ +Gd ³⁺ +Y ³⁺ : 0-20%; and/or Nb ⁵⁺⁺ + W ⁶⁺ +Ti ⁴⁺ : 0-15%; and/or Rn ⁺ : 0-10%; and/or Yb ³⁺ : 0-10%; and/or Zn ²⁺ : 0-10%; and/or or B ³⁺ : 0-10%; and/or Si ⁴⁺ : 0-5%; and/or Ta ⁵⁺ : 0-10%; and/or Sb ³⁺ : 0-1%; and/or Sn ⁴⁺ : 0-1%; and/or Ce ⁴⁺ : 0-1%, the Rn ⁺ is one or more of Li ⁺ , Na ⁺ , K ⁺ .

(3) An optical glass, the composition of which is expressed in molar percentages. The cations contain: P ⁵⁺ : 26-45%; La ³⁺ +Gd ³⁺ +Y ³⁺ : 0-20%; Al ³⁺ : 5% ～25%; R ²⁺ : 28～60%; Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 0～15%; Rn ⁺ : 0～10%; Yb ³⁺ : 0～10%; Zn ²⁺ : 0～10%; B ³⁺ : 0～10%; Si ⁴⁺ : 0～5%; Ta ⁵⁺ : 0～10%; Sb ³⁺ : 0～1%; Sn ⁴⁺ : 0～1% ; Ce ⁴⁺ : 0~1%; anion contains F ^- and O ^2- , wherein: F ^- + O ^2- is more than 98%, and the R ²⁺ is Ba ²⁺ , Sr ²⁺ , Ca ²⁺ and The total content of Mg ²⁺ , Rn ⁺ is one or more of Li ⁺ , Na ⁺ , K ⁺ .

(4) An optical glass, the cations of which contain P ⁵⁺ , Al ³⁺ and R ²⁺ , and the anions contain F ^- and O ^2- . The refractive index n _d of the optical glass is 1.57-1.66, Abbe The number ν _d is 56 to 65, the value of ΔP _C,s is 0 or less, and the value of ΔP _C,t is -0.01 or less.

(5) According to the optical glass described in (4), its components are expressed in molar percentages, and the cations include: P ⁵⁺ : 26-45%; La ³⁺ +Gd ³⁺ +Y ³⁺ : 0-20% ; Al ³⁺ : 5～25%; R ²⁺ : 28～60%; Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 0～15%; Rn ⁺ : 0～10%; Yb ³⁺ : 0～ 10%; Zn ²⁺ : 0-10%; B ³⁺ : 0-10%; Si ⁴⁺ : 0-5%; Ta ⁵⁺ : 0-10%; Sb ³⁺ : 0-1%; Sn ^{4 +} : 0-1%; Ce ⁴⁺ : 0-1%, the R ²⁺ is the total content of Ba ²⁺ , Sr ²⁺ , Ca ²⁺ and Mg ²⁺ , Rn ⁺ is Li ⁺ , Na ⁺ , One or more of K ⁺ .

(6) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: (P ⁵⁺ +Al ³⁺ )/F ^- is 0.9 to 4.0, preferably (P ⁵⁺ +Al ³⁺ )/F ^- is 1.0 to 3.5, more preferably (P ⁵⁺ +Al ³⁺ )/F ^- is 1.2 to 3.0, more preferably (P ⁵⁺ +Al ³⁺ )/F ^- is 1.5 ~2.5.

(7) The optical glass according to any one of (1) to (5), the composition of which is expressed in molar percentage, wherein: (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.1 to 10.0, preferably (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.2 to 6.0, more preferably (Nb ^{5 +} +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.5 to 4.0, more preferably (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ + Gd ³⁺ +Y ³⁺ ) is 0.7 to 2.0.

(8) The optical glass according to any one of (1) to (5), the composition of which is expressed in molar percentage, wherein: Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.3～ 1.0, preferably Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.5-1.0, more preferably Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.6-1.0, further Preferably, Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.65 to 1.0.

(9) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: Mg ²⁺ /Ba ²⁺ is 0.01 to 0.3, preferably Mg ²⁺ /Ba ²⁺ It is 0.02 to 0.25, more preferably Mg ²⁺ /Ba ²⁺ is 0.03 to 0.2, still more preferably Mg ²⁺ /Ba ²⁺ is 0.05 to 0.15.

(10) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: Sr ²⁺ /Y ³⁺ is 0.3 to 10.0, preferably Sr ²⁺ /Y ³⁺ 0.5 to 5.0, more preferably Sr ²⁺ /Y ³⁺ is 0.8 to 3.0, still more preferably Sr ²⁺ /Y ³⁺ is 1.0 to 2.0.

(11) The optical glass according to any one of (1) to (5), the composition of which is expressed in mole percentage, wherein: (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is 2.0 or less, preferably (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is 1.0 or less, more preferably (Ca ²⁺ +Zn ²⁺ )/(Nb ^{5 +} +W ⁶⁺ +Ti ⁴⁺ ) is 0.8 or less, more preferably (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is 0.5 or less.

(12) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 2.0 or less, preferably (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 1.0 or less, more preferably (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 0.8 or less, still more preferably (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 0.5 or less.

(13) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: F ^- /O ^2- is 0.18 to 0.6, preferably F ^- /O ^2- is 0.2 ~0.5, more preferably F ⁻ /O ^2- is 0.25 to 0.45, even more preferably F ⁻ /O ^2- is 0.28 to 0.4.

(14) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: F ^- /Ba ²⁺ is 0.35 to 1.2, preferably F ^- /Ba ²⁺ is 0.5 ~1.1, more preferably F ⁻ /Ba ²⁺ is 0.6 to 1.0, still more preferably F ⁻ /Ba ²⁺ is 0.65 to 0.9.

^{and _} /or La ³⁺ +Gd ³⁺ +Y ³⁺ : 0.1-15%, preferably La ³⁺ +Gd ³⁺ +Y ³⁺ : 0.5-12%, more preferably La ³⁺ +Gd ³⁺ +Y ³⁺ : 1～10%; and/or Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 0.5～10%, preferably Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 1～8%; and/or R ²⁺ : 35-55%, preferably R ²⁺ : 38-50%; and/or Al ³⁺ : 8-20%, preferably Al ³⁺ : 10-18%; and/or Rn ⁺ : 0-5%, preferably Rn ⁺ : 0-2%, more preferably no Rn ⁺ ; and/or Yb ³⁺ : 0-5%, preferably Yb ³⁺ : 0-2%, more preferably no Yb ³⁺ ; and/or Zn ^{2 +} : 0-5%, preferably Zn ²⁺ : 0-2%, more preferably no Zn ²⁺ ; and/or B ³⁺ : 0-5%, preferably B ³⁺ : 0-2%, more preferably no Contains B ³⁺ ; and/or Si ⁴⁺ : 0-2%, preferably Si ⁴⁺ : 0-1%, more preferably does not contain Si ⁴⁺ ; and/or Ta ⁵⁺ : 0-5%, preferably Ta ^{5 +} : 0-2%, more preferably no Ta ⁵⁺ ; and/or Sb ³⁺ : 0-0.5%, preferably Sb ³⁺ : 0-0.1%; and/or Sn ⁴⁺ : 0-0.5%, preferably Sn ⁴⁺ : 0-0.1%, more preferably no Sn ⁴⁺ ; and/or Ce ⁴⁺ : 0-0.5%, preferably Ce ⁴⁺ : 0-0.1%, more preferably no Ce ⁴⁺ .

(16) The optical glass according to any one of (1) to (5), the composition of which is expressed in mole percentage, wherein: Ba ²⁺ : 28-45%, preferably Ba ²⁺ : 30-40%, more Preferably Ba ²⁺ : 33-38%; and/or Sr ²⁺ : 0-10%, preferably Sr ²⁺ : 1-8%, more preferably Sr ²⁺ : 2-7%; and/or Mg ²⁺ : 0-10%, preferably Mg ²⁺ : 1-7%, more preferably Mg ²⁺ : 2-6%; and/or Ca ²⁺ : 0-10%, preferably Ca ²⁺ : 0-6%, more preferably Ca ²⁺ : 0-5%; and/or La ³⁺ : 0-10%, preferably La ³⁺ : 0-5%, more preferably La ³⁺ : 0-3%; and/or Gd ³⁺ : 0 ~10%, preferably Gd ³⁺ : 0~5%, more preferably Gd ³⁺ : 0~3%; and/or Y ³⁺ : 0~10%, preferably Y ³⁺ : 0.5~8%, more preferably Y ³⁺ : 1 to 7%; and/or Nb ⁵⁺ : 0 to 10%, preferably Nb ⁵⁺ : 0 to 6%, more preferably Nb ⁵⁺ : 0 to 4%; and/or W ⁶⁺ : 0 to 10%, preferably W ⁶⁺ : 0-6%, more preferably W ⁶⁺ : 0-5%; and/or Ti ⁴⁺ : 0-10%, preferably Ti ⁴⁺ : 0-5%, more preferably Ti ^{4 +} : 0 to 2%, more preferably does not contain Ti ⁴⁺ .

(17) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, wherein: F ^- : 15-45%, preferably F ^- : 18-38%, more preferably F ^- : 21-35%; and/or O ^2- : 55-85%, preferably O ^2- : 62-82%, more preferably O ^2- : 65-79%.

(18) The optical glass according to any one of (1) to (5), the components of which are expressed in molar percentages, and the anions also contain: Cl ^- : 0-2%; and/or Br ^- : 0-2% ; and/or I ^- : 0~2%, preferably the anion also contains: Cl ^- : 0~1%; and/or Br ^- : 0~1%; and/or I ^- : 0~1%, more preferably the anion It also contains: Cl ^- : 0-0.5%; and/or Br ^- : 0-0.5%; and/or I ^- : 0-0.5%.

(19) The optical glass according to any one of (1) to (5), wherein the optical glass has a refractive index n _d of 1.57 to 1.66, preferably a refractive index n _d of 1.58 to 1.64, more preferably a refractive index n _d 1.60 to 1.63; the Abbe number ν _d is 56 to 65, preferably the Abbe number ν _d is 58 to 63, and more preferably the Abbe number ν _d is 59 to 62.

(20) The optical glass according to any one of (1) to (5), wherein the ΔP _C,s value of the optical glass is 0 or less, preferably ΔP _C,s value is -0.01 or less, more preferably ΔP _{C, s} value is less than -0.015, more preferably ΔP _{C, s} value is less than -0.02; and/or ΔP _{C, t} value is less than -0.01, preferably ΔP _{C, t} value is less than -0.02, more preferably ΔP _{C, t} value It is -0.03 or less, more preferably ΔP _C,t value is -0.04 or less, still more preferably ΔP _C,t value is -0.05 or less.

(21) The optical glass according to any one of (1) to (5), wherein the water resistance stability D _W of the optical glass is at least 3 types, and preferably the water resistance stability D _W is at least 2 types; and/or Or the acid resistance stability _DA is more than 3 types, preferably the acid resistance stability _DA is more than 2 types; and/or the weather resistance CR is more than 2 types, preferably the weather resistance CR is 1 type; and/or the transition temperature T _g is below 620°C, preferably the transition temperature _Tg is below 610°C, more preferably the transition temperature _Tg is below 600°C; and/or the density p is below 4.60g/ ^cm3 , preferably the density p is below 4.50g/ ^cm3 , More preferably, the density p is 4.40 g/cm ^or less; and/or λ ₈₀ is 380 nm or less, preferably λ ₈₀ is 375 nm or less, more preferably λ ₈₀ is 370 nm or less; and/or λ ₅ is 330 nm or less, preferably λ ₅ is 325 nm Below, more preferably _λ5 is 320nm or less.

(22) A glass preform made of the optical glass described in any one of (1) to (21).

(23) An optical element made of the optical glass described in any one of (1) to (21) or the glass preform described in (22).

(24) An optical device containing the optical glass described in any one of (1) to (21); and/or containing the optical element described in (23).

The beneficial effects of the present invention are: through reasonable component design, the optical glass obtained by the present invention has a lower ΔP _C,s value and ΔP _C,t value while having a desired refractive index and Abbe number, and is weather-resistant excellent.

Hereinafter, although embodiment of the optical glass of this invention is demonstrated in detail, this invention is not limited to the following embodiment, It can change suitably within the scope of the objective of this invention, and can implement. In addition, with regard to the repeated description, although the description may be appropriately omitted, the gist of the invention will not be limited accordingly. In the following content, the optical glass of the present invention is sometimes simply referred to as glass.

[Optical glass]

The scope of each component (ingredient) constituting the optical glass of the present invention will be described below. In this specification, unless otherwise specified, the content of the cationic component is represented by the mole percentage (mol%) of the cation in the total cationic components, and the content of the anion component is expressed by the mole percentage of the anion in the total anion components (mol%) means; the ratio between the contents of cationic components is the ratio of the mole percentage content between the contents of each cationic component; the ratio between the contents of anion components is the mole percentage between the contents of each anion component The ratio of content; the ratio between the content of anion and cation components is the ratio of the molar percentage content of cationic components to all cationic components and the molar percentage content of anionic components to all anionic components.

Unless otherwise indicated in a specific instance, the numerical ranges set forth herein include the upper and lower values, "above" and "below" include the endpoints, and all integers and fractions within the range, without limitation. Specific values listed when limiting scope. The term "and/or" herein is inclusive, for example, "A and/or B" means only A, or only B, or both A and B.

It should be noted that the ionic valences of the components described below are representative values used for convenience and are not different from other ionic valences. The ion valence of each component in optical glass may be other than the representative value. For example, P usually exists in the glass with an ion valence of +5, so "P ⁵⁺ " is used as a representative value in this patent, but there is a possibility of existing in other ion valence states, which is also included in this patent. within the scope of patent protection.

＜About cationic components＞

P ⁵⁺ is a glass network former component, which can improve the stability of the glass and reduce the △P _C,t value and △P _C,s value of the glass. When its content is lower than 26%, the above effect is not obvious. And the stability of the glass decreases, and the crystallization tendency increases. Therefore, the content of P ⁵⁺ in the present invention is more than 26%, preferably more than 30%, more preferably more than 33%. On the other hand, if the content of P ⁵⁺ exceeds 45%, the weather resistance of the glass will decrease, and it will be difficult to obtain the desired optical constants of the present invention. Therefore, the content of P ⁵⁺ in the present invention is 45% or less, preferably 40% or less, more preferably 38% or less. In some embodiments, 26%, 26.5%, 27%, 27.5%, 28%, 28.5%, 29%, 29.5%, 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41% , 41.5%, 42%, 42.5%, 43%, 43.5%, 44%, 44.5%, or 45% of P ⁵⁺ .

Al ³⁺ is the skeleton component of the glass of the present invention, which can effectively improve the mechanical properties and weather resistance of the glass, and at the same time reduce the thermal expansion coefficient of the glass. When its content is lower than 5%, a stable glass skeleton cannot be formed and the above-mentioned effects can be obtained . When the content of Al ³⁺ is higher than 25%, the transition temperature and liquidus temperature of the glass increase, and the melting of the glass becomes difficult. At the same time, the forming temperature increases, which leads to the intensification of volatilization of the glass, which makes the glass streaks worse, and excessive A high transition temperature can make compression molding difficult. Therefore, the content of Al ³⁺ in the present invention is 5-25%, preferably 8-20%, more preferably 10-18%. In some embodiments, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, 16%, 16.5%, 17%, 17.5%, 18%, 18.5%, 19%, 19.5%, 20% , 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.5%, or 25% of Al ³⁺ .

La ³⁺ has the effect of increasing the refractive index of glass and improving acid resistance. When the content of La ³⁺ is too much, the thermal stability and devitrification resistance of the glass will decrease, and the glass will easily devitrify during the manufacturing process. Therefore, the content of La ³⁺ in the present invention is 10% or less, preferably 5% or less, more preferably 3% or less. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of La ³⁺ .

Gd ³⁺ can improve the chemical stability of the glass and increase the refractive index. If its content exceeds 10%, the transition temperature of the glass will increase and its stability will also decrease. Therefore, the content of Gd ³⁺ in the present invention is 10% or less, preferably 5% or less, more preferably 3% or less. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Gd ³⁺ .

Y ³⁺ has the functions of high refractive index and low dispersion, improving the abrasion of glass and appropriately reducing the △P _C,t value and △P _C,s value of the glass. When its content exceeds 10%, the devitrification tendency of the glass increases . Therefore, the content of Y ³⁺ in the present invention is 10% or less, preferably 0.5-8%, more preferably 1-7%. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Y ³⁺ .

In some embodiments of the present invention, the total content La ³⁺ +Gd ³⁺ +Y ³⁺ of La 3+ , Gd ³⁺ , and Y ³⁺ is controlled below 20%, which can prevent the ^optical constant of the glass from exceeding the design requirements , so it is preferable that La ³⁺ +Gd ³⁺ +Y ³⁺ is 20% or less. Furthermore, by making the total content of La ³⁺ , Gd ³⁺ , and Y ³⁺ La ³⁺ +Gd ³⁺ +Y ³⁺ in the range of 0.1 to 15%, it is easier to obtain desired optical constants and at the same time It can improve the chemical stability of the glass, so it is more preferable that La ³⁺ +Gd ³⁺ +Y ³⁺ is 0.1-15%, it is more preferable that La ³⁺ +Gd ³⁺ +Y ³⁺ is 0.5-12%, and it is even more preferable La ³⁺ +Gd ³⁺ +Y ³⁺ is 1 to 10%. In some embodiments, La ³⁺ +Gd ³⁺ +Y ³⁺ can be 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12% , 12.5%, 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, 16%. 16.5%, 17%, 17.5%, 18%, 18.5%, 19%, 19.5%, or 20%.

In some embodiments of the present invention, by controlling Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) in the range of 0.3-1.0, the weather resistance of the glass can be optimized and the light transmittance of the glass can be improved. Therefore, preferably Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.3-1.0, more preferably Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.5-1.0, further Preferably Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.6 to 1.0, more preferably Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.65 to 1.0. In some embodiments, the value of Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) can be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85 , 0.9, 0.95, or 1.0.

Yb ³⁺ can increase the refractive index of the glass, and when its content is too high, the thermal stability and devitrification resistance of the glass will decrease. Therefore, the content of Yb ³⁺ in the present invention is 10% or less, preferably 5% or less, more preferably 2% or less, and further preferably does not contain Yb ³⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Yb ³⁺ .

W ⁶⁺ can increase the refractive index and dispersion of the glass, reduce the transition temperature, △P _C,t value and △P _C,s value of the glass, if its content exceeds 10%, the coloring degree of the glass will deteriorate, and the refractive index will be easy Exceeding the design requirements, the degree of wear becomes worse. Therefore, the content of W ⁶⁺ is 10% or less, preferably 6% or less, more preferably 5% or less. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of W ⁶⁺ .

Nb ⁵⁺ can increase the refractive index and dispersion of the glass, reduce the △P _C,t value and △P _C,s value of the glass, and improve the thermal and chemical stability of the glass. If its content exceeds 10%, the resistance of the glass will decrease. The devitrification decreases, and the degree of coloration deteriorates. Therefore, the content of Nb ⁵⁺ is 10% or less, preferably 6% or less, more preferably 4% or less. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Nb ⁵⁺ .

Ti ⁴⁺ can improve the chemical stability of the glass and reduce the △P _C,t value and △P _C,s value of the glass, but if its content is too much, the crystallization tendency of the glass will increase, the coloring degree will deteriorate, and the melting of the glass will reduced sex. Therefore, the content of Ti ⁴⁺ in the present invention is 10% or less, preferably 5% or less, more preferably 2% or less. In some embodiments, it is further preferred not to contain Ti ⁴⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% Ti ⁴⁺ .

^In some ^embodiments of ^the present invention, ^the glass refractive index ^and Abbe number ^can be prevented Exceeding the design requirements, preventing the loss of devitrification resistance and deterioration of the coloring degree, it is preferred that Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ be 15% or less. Furthermore, by making Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ more than 0.5%, it is beneficial to reduce the ΔP _C,t value and ΔP _C,s value of the glass. Therefore, it is more preferable that Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ is 0.5 to 10%, and it is still more preferable that Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ is 1 to 8%. In some embodiments, Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ can be 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12% , 12.5%, 13%, 13.5%, 14%, 14.5%, or 15%.

The inventors have found through a large number of experimental studies that, in some embodiments of the present invention, by making the total content of Nb ⁵⁺ , W ⁶⁺ and Ti ⁴⁺ Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ and La ³⁺ , Gd ^{3 +} and Y ³⁺ total content ratio between La ³⁺ +Gd ³⁺ +Y ³⁺ (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) Between 0.1 and 10.0, it is easier to keep the optical constant of the glass within the desired range, reduce the ΔP _C,t value and ΔP _C,s value of the glass, and optimize the chemical stability of the glass. Therefore, preferably (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.1 to 10.0, more preferably (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.2 to 6.0, more preferably (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.5 to 4.0, and more preferably (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.7 to 2.0. In some embodiments, the value of (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) can be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 ,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.3,2.5,2.7 ,3.0,3.3,3.5,3.7,4.0,4.3,4.5,4.7,5.0,5.3,5.5,5.7,6.0,6.3,6.5,6.7,7.0,7.3,7.5,7.7,8.0,8.3,8.5,8.7,9.0 , 9.3, 9.5, 9.7, or 10.0.

In the present invention, the thermal stability of the glass is improved by containing 28-60% of the alkaline earth metal component R ²⁺ (where R ²⁺ is the total content of Ba ²⁺ , Sr ²⁺ , Ca ²⁺ and Mg ²⁺ ). , to adjust the optical constant of the glass, preferably containing 35-55% of R ²⁺ , more preferably containing 38-50% of R ²⁺ . In some embodiments, 28%, 28.5%, 29%, 29.5%, 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43% , 43.5%, 44%, 44.5%, 45%, 45.5%, 46%, 46.5%, 47%, 47.5%, 48%, 48.5%, 49%, 49.5%, 50%, 50.5%, 51%, 51.5 %, 52%, 52.5%, 53%, 53.5%, 54%, 54.5%, 55%, 55.5%, 56%, 56.5%, 57%, 57.5%, 58%, 58.5%, 59%, 59.5%, or 60% of R ²⁺ .

Ba ²⁺ has the effect of improving the refractive index, thermal stability and weather resistance of the glass. In the present invention, the above effects are obtained by containing more than 28% of Ba ²⁺ . On the other hand, if the content of Ba ²⁺ exceeds 45%, the transition temperature and density of the glass increase, and the degree of abrasion becomes poor. Therefore, the content of Ba ²⁺ in the present invention is 28-45%, preferably 30-40%, more preferably 33-38%. In some embodiments, 28%, 28.5%, 29%, 29.5%, 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43% , 43.5%, 44%, 44.5%, or 45% of Ba ²⁺ .

Sr ²⁺ can reduce the thermal expansion coefficient of glass, and can effectively adjust the refractive index and density of glass, but if its content is too high, the devitrification resistance and chemical stability of glass will be reduced. Therefore, the content of Sr ²⁺ in the present invention is 0-10%, preferably 1-8%, more preferably 2-7%. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Sr ²⁺ .

In some embodiments of the present invention, controlling the relative content of Sr ²⁺ and Y ³⁺ Sr ²⁺ /Y ³⁺ in the range of 0.3 to 10.0 can reduce the transition temperature and density of the glass, so Sr ²⁺ /Y 3+ is preferred Y ³⁺ is 0.3 to 10.0, more preferably Sr ²⁺ /Y ³⁺ is 0.5 to 5.0. Furthermore, if Sr ²⁺ /Y ³⁺ is in the range of 0.8 to 3.0, the devitrification resistance of the glass can be further improved, so it is more preferable that Sr ²⁺ /Y ³⁺ is 0.8 to 3.0, and it is even more preferable that Sr ²⁺ /Y ³⁺ ranges from 1.0 to 2.0. In some embodiments, the value of Sr ²⁺ /Y ³⁺ can be 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 ,2.0,2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9,3.0,3.3,3.5,3.7,4.0,4.3,4.5,4.7,5.0,5.3,5.5,5.7,6.0,6.3,6.5 , 6.7, 7.0, 7.3, 7.5, 7.7, 8.0, 8.3, 8.5, 8.7, 9.0, 9.3, 9.5, 9.7, or 10.0.

Mg ²⁺ can improve the abrasion resistance and devitrification resistance of the glass, and if its content exceeds 10%, the stability of the glass will decrease. Therefore, the content of Mg ²⁺ in the present invention is 0-10%, preferably 1-7%, more preferably 2-6%. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Mg ²⁺ .

In some embodiments of the present invention, by making the ratio Mg ²⁺ /Ba ²⁺ between the contents of Mg ²⁺ and Ba ²⁺ in the range of 0.01 to 0.3, it is possible to optimize the abrasion resistance of the glass while improving the chemical stability. Therefore, Mg ²⁺ /Ba ²⁺ is preferably 0.01-0.3, more preferably Mg ²⁺ /Ba ²⁺ is 0.02-0.25, still more preferably Mg ²⁺ /Ba ²⁺ is 0.03-0.2, still more preferably Mg ²⁺ / Ba ²⁺ is 0.05 to 0.15. In some embodiments, the value of Mg2 ⁺ /Ba2 ⁺ can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17 , 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, or 0.3.

Ca ²⁺ has the function of improving the chemical stability of glass and improving the grinding performance of glass. It can replace Ba ²⁺ within a certain content and can reduce the density of glass. If the content is too much, the devitrification resistance of glass will deteriorate. Therefore, the content of Ca ²⁺ in the present invention is 0-10%, preferably 0-6%, more preferably 0-5%. In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Ca ²⁺ .

Rn ⁺ (Rn ⁺ is one or more of Li ⁺ , Na ⁺ , K ⁺ ) can reduce the transition temperature and refractive index of the glass, and improve the molding performance of the glass. If the content is too much, the stability and weather resistance of the glass will be reduced. Therefore, the content of Rn ⁺ in the present invention is 10% or less, preferably 5% or less, more preferably 2% or less. In some embodiments, it is further preferable not to contain Rn ⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Rn ⁺ .

Through a lot of experimental research, the present invention found that, in some embodiments, by controlling (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ below 2.0, the density, _PC,t value and △ _PC,s value of the glass can be reduced , to optimize the abrasion of glass. Therefore, preferably (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 2.0 or less, more preferably (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 1.0 or less, still more preferably (Rn ⁺ +Ca ²⁺ )/Mg ^{2 +} is 0.8 or less, more preferably (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 0.5 or less. In some embodiments, the value of (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ can be 0, greater than 0, 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, or 2.0.

Zn ²⁺ can lower the transition temperature of the glass and improve the thermal stability of the glass. When its content exceeds 10%, the dispersion of the glass will increase, it will be difficult to obtain the desired optical constants, and the devitrification resistance of the glass will decrease. Therefore, the Zn ²⁺ content is limited 10% or less, preferably 5% or less, more preferably 2% or less. In some embodiments, it is further preferable not to contain Zn ²⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Zn ²⁺ .

The present invention finds through a large number of experimental studies that, in some embodiments, by combining the total content of Ca ²⁺ and Zn ²⁺ Ca ²⁺ +Zn ²⁺ with the total content of Nb ⁵⁺ , W ⁶⁺ , and Ti ⁴⁺ Nb ^{5 +} The ratio between + +W ⁶⁺ +Ti ⁴⁺ (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is controlled below 2.0, which can make the glass obtain a lower △P _C,t value and △P _C,s value at the same time, optimize the anti-devitrification performance of the glass. Therefore, preferably (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is 2.0 or less, more preferably (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is 1.0 or less. Furthermore, by setting (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) at 0.8 or less, the bubble degree of the glass can be further optimized and the thermal expansion coefficient of the glass can be reduced. Therefore, it is more preferable that (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) is 0.8 or less, and it is still more preferable that (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ^{6 +} +Ti ⁴⁺ ) is 0.5 or less. In some embodiments, the value of (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) can be 0, greater than 0, 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, or 2.0.

Si ⁴⁺ can improve the devitrification resistance of the glass, reduce the abrasion of the glass and improve the processability. When its content exceeds 5%, the melting performance of the glass will decrease. Therefore, the content of Si ⁴⁺ in the optical glass of the present invention is 5% or less, preferably 2% or less, more preferably 1% or less, and further preferably does not contain Si ⁴⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5% Si ⁴⁺ .

B ³⁺ can improve the devitrification resistance of glass, but in fluorine-containing optical glass, the glass will be volatilized strongly when melting, resulting in unstable optical constants and streaks of the glass, so the content of B ³⁺ is limited to 10% or less, preferably 5% or less, more preferably 2% or less, and still more preferably does not contain B ³⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of B ³⁺ .

Ta ⁵⁺ can increase the refractive index of the glass, but when the content is too high, the glass is prone to devitrification. Therefore, the content of Ta ⁵⁺ is less than 10%, preferably less than 5%, more preferably less than 2%, because it has no significant contribution to reducing the ΔP _C,t value and ΔP _C,s value of the glass and is expensive , and more preferably does not contain Ta ⁵⁺ . In some embodiments, may contain 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% , 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of Ta ⁵⁺ .

The glass of the present invention may contain one or more components of Sb ³⁺ , Sn ⁴⁺ , and Ce ⁴⁺ as clarifiers to improve the defoaming effect of the glass. When the content of Sb ³⁺ exceeds 1%, the glass has a tendency to reduce the clarification performance, and at the same time, due to its strong oxidation, the deterioration of the forming mold is promoted, so the content of Sb ³⁺ in the present invention is 1% or less, preferably 0.5% or less , more preferably 0.1% or less. Sn ⁴⁺ can also be used as a clarifying agent, but when its content exceeds 1%, the glass will be colored, or when the glass is heated, softened, and molded again, Sn ⁴⁺ will become the starting point of crystal nucleation, resulting in loss. Therefore, the content of Sn ⁴⁺ in the present invention is 1% or less, preferably 0.5% or less, more preferably 0.1% or less, and further preferably does not contain Sn ⁴⁺ . The function and content of Ce ⁴⁺ are the same as those of Sn ⁴⁺ , and its content is 1% or less, preferably 0.5% or less, more preferably 0.1% or less, and more preferably does not contain Ce ⁴⁺ . In some embodiments, 0%, greater than 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1% of Sb ³⁺ and /or Sn ⁴⁺ and/or Ce ⁴⁺ .

＜About anionic components＞

In the glass of the present invention, by making the total content of F ^- and O ^2- F ^- + O ^{2 -} more than 98%, the glass can obtain excellent stability while reducing the P _C,t value and △P _C of the glass _,s value, preferably F ^- + O ^2- is 98.5% or more, more preferably F ^- + O ^2- is 99% or more, and even more preferably F ^- + O ^2- is 99.5% or more. In some embodiments, F ⁻ +O ^{2 −} can be 98%, 98.1%, 98.2%, 98.3%, 98.4%, 98.5%, 98.6%, 98.7%, 98.8%, 98.9%, 99%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, 99.6%, 99.7%, 99.8%, 99.9%, or 100%.

F ^- It has obvious effects on reducing the temperature coefficient of refractive index and transition temperature of glass. It is an important component to increase the Abbe number and reduce the value of P _C,t and △P _C,s . If its content is less than 15%, the above-mentioned The effect is not obvious, preferably the content of ^F- is more than 18%, more preferably the content of ^F- is more than 21%. On the other hand, if the F ^- content is too high, it will reduce the refractive index of the glass, weaken the stability of the glass, and increase the thermal expansion coefficient of the glass. Especially during the melting process, the volatilization of fluorine will not only easily pollute the environment, but also easily make the glass The internal composition is not uniform, therefore, the content of ^F- in the present invention is limited to 45% or less, preferably 38% or less, more preferably 35% or less. In some embodiments, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, or 45% % of F ^- .

The optical glass of the present invention contains O ^2- , especially, by containing more than 55% of O ^2- , the stability and weather resistance of the glass can be improved, and the increase of the abrasion degree and the deterioration of the streak degree of the glass can be suppressed. On the other hand, by controlling the content of ^O2- below 85%, the high-temperature viscosity and melting temperature of the glass can be prevented from increasing. Therefore, the content of O ^2- is 55-85%, preferably 62-82%, more preferably 65-79%. In some embodiments, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, or 85% % of O ^2- .

In the present invention, the defoaming effect of the glass can be improved by containing less than 2% of Cl ^- as a clarifying agent, preferably the content of Cl ^- is 0-1%, more preferably 0-0.5%. In some embodiments, may contain 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% , 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2% of Cl ^- .

In some embodiments of the present invention, the relative content F ^- /O ^2- of F ^- and O ^{2 -} is controlled within the range of 0.18 to 0.6, which can improve the stability and thermal stability of the glass and optimize the light transmittance of the glass . Therefore, preferably F ^- /O ^2- is 0.18 to 0.6, more preferably F ^- /O ^2- is 0.2 to 0.5, still more preferably F ^- /O ^2- is 0.25 to 0.45, still more preferably F ^- /O ^2- is 0.28～0.4. In some embodiments, the value of F ⁻ /O ^{2 −} can be 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.5 9. or 0.6.

In some embodiments of the present invention, by setting F ^- /Ba ²⁺ in the range of 0.35 to 1.2, a lower transition temperature can be obtained while reducing the P _C,t value and △P _C,s value of the glass . Therefore, preferably F ^- /Ba ²⁺ is 0.35-1.2, more preferably F ^- /Ba ²⁺ is 0.5-1.1, still more preferably F ^- /Ba ²⁺ is 0.6-1.0, still more preferably F ^- /Ba ²⁺ is 0.65～0.9. In some embodiments, the value of F ⁻ /Ba ²⁺ can be 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.6, 0.63, 0.65, 0.67, 0.73, 0.77, 0.83, 0.87, 0.93, 0.95, 0.97 1.0, 1.03, 1.05, 1.07, 1.1, 1.13, 1.15, 1.17, or 1.2.

In some embodiments of the present invention, it is preferable to make (P ⁵⁺ +Al ³⁺ )/F ^- in the range of 0.9 to 4.0, which can improve the devitrification resistance and weather resistance of the glass, and suppress the volatilization of fluorine, more preferably (P ⁵⁺ +Al ³⁺ )/F ^- is 1.0 to 3.5, more preferably (P ⁵⁺ +Al ³⁺ )/F ^- is 1.2 to 3.0, still more preferably (P ⁵⁺ +Al ³⁺ )/F ^- is 1.5 to 2.5. In some embodiments, the value of (P ⁵⁺ +Al ³⁺ )/F ⁻ can be 0.9, 0.95, 1.0, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2.0, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.85, 2.9, 2.95, 3.0, 3.05, 3.1, 3.15, 3.2, 3.25, 3.3, 3.35, 3.4, 3.45, 3.5, 3.55, 3.6, 3.65, 3.7, 3.75, 3.8, 3.85, 3.9, 3.95, or 4.0.

＜About other ingredients＞

The optical glass of the present invention may contain other components such as Zr ⁴⁺ , Ge ⁴⁺ , Bi ³⁺ , Te ⁴⁺ , Br ⁻ , I ^−, etc. as required within the range not impairing the properties of the optical glass of the present invention. In some embodiments, the total or individual content of Ta ⁵⁺ , Ge ⁴⁺ , Bi ³⁺ , and Te ⁴⁺ in the optical glass of the present invention is preferably 5% or less, more preferably 3% or less, and even more preferably 1% Hereinafter, it is more preferable not to contain. In some embodiments, the total or separate content of Br ^- and I ^- in the optical glass of the present invention is preferably 2% or less, more preferably 1% or less, further preferably 0.5% or less, and even more preferably not contained.

＜About ingredients that should not be contained＞

Even if components such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag, and Mo are contained in small amounts alone or in combination, the glass will be colored and absorb at a specific wavelength in the visible region, thereby weakening the The nature of the effect of improving the visible light transmittance of the present invention, therefore, especially optical glass that requires transmittance in the visible light region wavelength, preferably does not contain the above-mentioned components substantially.

As, Pb, Th, Cd, Tl, Os, Be, and Se components tend to be controlled and used as harmful chemical substances in recent years. Environmental protection measures are required. Therefore, when emphasis is placed on the influence on the environment, it is preferable not to contain them substantially except for unavoidable mixing. Thereby, the optical glass becomes practically free of environmental polluting substances. Therefore, the optical glass of the present invention can be manufactured, processed, and discarded without taking special environmental measures.

The "does not contain" and "0%" described herein mean that the component is not deliberately added as a raw material to the optical glass of the present invention; but as a raw material and/or equipment for producing optical glass, there will be some unintentional The added impurities or components may be contained in small or trace amounts in the final optical glass, which is also within the protection scope of the patent of the present invention.

Hereinafter, the performance of the optical glass of the present invention will be described.

＜Refractive index and Abbe number＞

The refractive index (n _d ) and Abbe number (ν _d ) of optical glass are tested according to the method stipulated in "GB/T 7962.1-2010".

In some embodiments, the lower limit of the refractive index ( _nd ) of the optical glass of the present invention is 1.57, preferably 1.58, more preferably 1.60; in some embodiments, the refractive index ( _nd ) of the optical glass of the present invention The upper limit of is 1.66, preferably the upper limit is 1.64, more preferably the upper limit is 1.63.

In some embodiments, the refractive index ( _nd ) of the optical glass of the present invention can be 1.57, 1.575, 1.58, 1.585, 1.59, 1.595, 1.60, 1.605, 1.61, 1.615, 1.62, 1.625, 1.63, 1.635, 1.64, 1.645 , 1.65, 1.655, or 1.66.

In some embodiments, the lower limit of the Abbe number (ν _d ) of the optical glass of the present invention is 56, preferably the lower limit is 58, and more preferably the lower limit is 59; in some embodiments, the Abbe number (ν d ) of the optical glass of the present invention _d ) has an upper limit of 65, preferably an upper limit of 63, and a more preferred upper limit of 62.

In some embodiments, the Abbe number (ν _d ) of the optical glass of the present invention may be 56, 56.5, 57, 57.5, 58, 58.5, 59, 59.5, 60, 60.5, 61, 61.5, 62, 62.5, 63, 63.5, 64, 64.5, or 65.

＜Water Resistance Stability＞

The water resistance stability of optical glass (D _W ) (powder method) is tested according to the method specified in "GB/T 17129".

In some embodiments, the water resistance stability (D _W ) of the optical glass of the present invention is 3 or more, preferably 2 or more.

＜Acid resistance stability＞

The acid resistance stability ( _DA ) (powder method) of optical glass is tested according to the method specified in "GB/T 17129".

In some embodiments, the acid resistance stability ( _DA ) of the optical glass of the present invention is 3 or more, preferably 2 or more.

＜Weather Resistance＞

The weather resistance (CR) of optical glass is tested by the following method.

Place the glass sample in a test box in a saturated water vapor environment with a relative humidity of 90%, and cycle alternately at 40-50°C every 1 hour for 15 cycles. The weather resistance category is divided according to the turbidity change before and after the sample is placed, and Table 1 is the weather resistance classification table. [Table 1] Weather resistance classification table category 1 2 3 4 a b c Turbidity increase (%) <0.3 0.3～1.0 1.0～2.0 2.0～4.0 4.0～6.0 ≥6.0

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

＜Transition temperature＞

The transition temperature (T _g ) of optical glass is tested according to the method specified in "GB/T7962.16-2010".

In some embodiments, the transition temperature (T _g ) of the optical glass of the present invention is lower than 620°C, preferably lower than 610°C, more preferably lower than 600°C.

＜Density＞

The density (ρ) of optical glass is tested according to the method specified in "GB/T7962.20-2010".

In some embodiments, the density (ρ) of the optical glass of the present invention is 4.60 g/cm ³ or less, preferably 4.50 g/cm ³ or less, more preferably 4.40 g/cm ³ or less.

＜Coloring degree＞

The short-wave transmission spectrum characteristic of the optical glass of the present invention is represented by coloring degree (λ ₈₀ /λ ₅ ). λ ₈₀ refers to the corresponding wavelength when the glass transmittance reaches 80%, and λ ₅ refers to the corresponding wavelength when the glass transmittance reaches 5%. Among them, the measurement of λ ₈₀ is to use a glass with a thickness of 10 ± 0.1mm having two opposite planes parallel to each other and optically polished, and measure the spectral transmittance in the wavelength range from 280nm to 700nm and show a transmittance of 80%. wavelength. The spectral transmittance or transmittance is expressed by I out /I _in when light of intensity I _in is incident vertically on the above-mentioned surface of the glass and light of intensity I _out is emitted from another plane through _the glass. amount, and also includes the transmittance of the surface reflection losses on the above-mentioned surface of the glass. The higher the refractive index of the glass, the greater the surface reflection loss. Therefore, in high refractive index glass, the small value of λ ₈₀ means that the coloring of the glass itself is very little.

In some embodiments, the _λ80 of the optical glass of the present invention is 380 nm or less, preferably λ ₈₀ is 375 nm or less, more preferably λ ₈₀ is 370 nm or less.

In _{some embodiments, the λ of the optical glass of the present invention is 330 nm or less, preferably λ 5 is} 325 nm or less, more preferably λ ₅ is 320 nm or less.

＜ΔP _C,s and ΔP _C,t value＞

The ΔP _C,s and ΔP _C,t values of optical glass are tested according to the method specified in "GB/T 7962.1-2010" to test the _NF , N _C , N _s and N _t values of the glass, and are calculated according to the following formula:

P _C,s = (n _C -n _s )/(n _F -n _C )

ΔP _C,s = P _C,s -0.4017-0.002365ν _d

P _C,t = (n _C -n _t )/(n _F -n _C )

ΔP _C,t = P _C,t -0.5462-0.004713ν _d

In some embodiments, the ΔP _C,s value of the optical glass of the present invention is 0 or less, preferably -0.01 or less, more preferably -0.015 or less, even more preferably -0.02 or less.

In some embodiments, the ΔP _C,t value of the optical glass of the present invention is -0.01 or less, preferably -0.02 or less, more preferably -0.03 or less, even more preferably -0.04 or less, and furthermore -0.05 or less.

[Manufacturing method]

The manufacturing method of the optical glass of the present invention is as follows: the glass of the present invention is produced using conventional raw materials and conventional processes, using carbonates, nitrates, sulfates, hydroxides, oxides, fluorides, phosphates, metaphosphates, etc. as raw materials After batching according to the conventional method, put the prepared charge into a smelting furnace at 850-1200°C (such as a platinum crucible with a cover, a platinum alloy crucible, etc.) for melting, and after clarification, stirring and homogenization, no Homogeneous molten glass without air bubbles and undissolved substances is formed by casting the molten glass in a mold and annealing it. Those skilled in the art can properly select raw materials, process methods and process parameters according to actual needs.

[Glass Preforms and Optical Components]

A glass preform can be produced from the produced optical glass by means of, for example, grinding processing, or compression molding such as reheat press molding, precision press molding, or the like. That is, the glass preform can be produced by mechanical processing such as grinding and grinding of optical glass, or by making a preform for compression molding from optical glass, and then grinding the preform after reheating and pressing. Glass preforms are produced by machining, or by precision stamping of preforms produced by grinding.

It should be noted that the means for preparing the glass preform are 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, wherein it is particularly preferable to form a preform from the optical glass of the present invention, and to use the preform for reheat press molding, precision press molding, etc., Make optical components such as lenses and prisms.

Both the glass preform and the optical element of the present invention are formed from the above-mentioned optical glass of the present invention. The glass preform of the present invention has the excellent characteristics of optical glass; the optical element of the present invention has the excellent characteristics of optical glass, and can provide various optical elements such as lenses and prisms with high optical value.

Examples of the lens include various lenses such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses whose lens surfaces are spherical or aspherical.

[Optical Instruments]

The optical elements formed from the optical glass of the present invention can be used to make optical instruments such as photographic equipment, imaging equipment, display devices, and monitoring equipment.

[Example]

＜Example of Optical Glass＞

In order to further clearly illustrate and illustrate the technical solutions of the present invention, the following non-limiting examples are provided.

In this example, the optical glass having the compositions shown in Table 2 to Table 4 was obtained by using the above-mentioned manufacturing method of optical glass. In addition, the properties 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 3]

<Example of glass preform>

The glasses obtained in Table 2 to Table 4 of the optical glass examples are used, for example, by means of grinding, or hot pressing, precision stamping, and other compression molding methods to produce concave meniscus lenses and convex meniscus lenses. , Bi-convex lens, bi-concave lens, plano-convex lens, plano-concave lens and other prefabricated parts of various lenses and prisms.

<Example of optical element>

The preforms obtained in the above glass preform embodiment are annealed, and the refractive index is fine-tuned while reducing the internal stress of the glass, so that the optical properties such as the refractive index reach the required values.

Next, each preform is ground and polished to produce various lenses and prisms such as concave meniscus lens, convex meniscus lens, biconvex lens, biconcave lens, plano-convex lens, and plano-concave lens. An antireflection film may be coated on the surface of the obtained optical element.

<Example of Optical Instrument>

The optical element prepared by the above optical element embodiment can be used for example in imaging equipment, sensor, microscope, medical technology, digital projection, communication, Optical communication technology/information transmission, optics/illumination in the automotive field, lithography, excimer lasers, chips, computer chips and integrated circuits and electronic devices including such circuits and chips.

Claims (55)

A kind of optical glass, its composition is expressed by mole percentage, the cation contains: P ⁵⁺ : 26~45%; Al ³⁺ : 5~25%; R ²⁺ : 28~60%; La ³⁺ +Gd ³⁺ +Y ³⁺ : greater than 0 but less than or equal to 20%, wherein the R ²⁺ is the total content of Ba ²⁺ , Sr ²⁺ , Ca ²⁺ and Mg ²⁺ , (Nb ⁵⁺ +W ⁶⁺ + Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.2~10.0; the anion contains F ^- and O ^2- , of which: F ^- +O ^2- is more than 98%, (P ⁵⁺ + Al ³⁺ )/F ^- is 0.9~4.0. The optical glass as claimed in item 1, wherein its components are represented by mole percentage, and the cations also contain: Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 0~15%; and/or Rn ⁺ : 0~ 10%; and/or Yb ³⁺ : 0~10%; and/or Zn ²⁺ : 0~10%; and/or B ³⁺ : 0~10%; and/or Si ⁴⁺ : 0~5% ; and/or Ta ⁵⁺ : 0~10%; and/or Sb ³⁺ : 0~1%; and/or Sn ⁴⁺ : 0~1%; and/or Ce ⁴⁺ : 0~1%, so Said Rn ⁺ is one or more of Li ⁺ , Na ⁺ , K ⁺ . A kind of optical glass, its composition is expressed by mole percentage, and the cation contains: P ⁵⁺ : 26~45%; La ³⁺ +Gd ³⁺ +Y ³⁺ : greater than 0 but less than or equal to 20%; Al ³⁺ : 5~25%; R ²⁺ : 28~60%; Nb ⁵⁺ +W ⁶⁺ +Ti ³⁺ : 0~15%; Rn ⁺ : 0~10%; Yb ³⁺ : 0~10%; Zn ^{2 +} : 0~10%; B ³⁺ : 0~10%; Si ⁴⁺ : 0~5%; Ta ⁵⁺ : 0~10%; Sb ³⁺ : 0~1%; Sn ⁴⁺ : 0~1 %; Ce ⁴⁺ : 0~1%; among them, (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.2~10.0; the anion contains F ^- and O ^2- , wherein: F ^- + O ^2- is more than 98%, the R ²⁺ is the total content of Ba ²⁺ , Sr ²⁺ , Ca ²⁺ and Mg ²⁺ , Rn ⁺ is Li ⁺ , Na ⁺ , K ⁺ in one or more. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and (P ⁵⁺ +Al ³⁺ )/F ^- is 0.9-4.0. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and (R ⁵⁺ +Al ³⁺ )/F ^- is 1.0-3.5. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and (P ⁵⁺ +Al ³⁺ )/F ^- is 1.2-3.0. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and (P ⁵⁺ +Al ³⁺ )/F ^- is 1.5-2.5. The optical glass according to any one of claims 1 to 3, wherein its components are represented by mole percentage, (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ + Y ³⁺ ) ranges from 0.2 to 6.0. The optical glass according to any one of claims 1 to 3, wherein its components are represented by mole percentage, (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ + Y ³⁺ ) ranges from 0.5 to 4.0. The optical glass according to any one of claims 1 to 3, wherein its components are represented by mole percentage, (Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ )/(La ³⁺ +Gd ³⁺ + Y ³⁺ ) ranges from 0.7 to 2.0. The optical glass according to any one of Claims 1-3, wherein its components are expressed in molar percentage, and Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.3-1.0. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.5-1.0. The optical glass according to any one of claims 1 to 3, wherein its components are represented by mole percentage, and Y ³⁺ /(La ³⁺ +Gd ³⁺ +Y ³⁺ ) is 0.65 to 1.0. The optical glass according to any one of claims 1 to 3, wherein its components are expressed in molar percentages, and Mg ²⁺ /Ba ²⁺ is 0.01 to 0.3. The optical glass according to any one of Claims 1-3, wherein its components are expressed in molar percentage, and Mg ²⁺ /Ba ²⁺ is 0.03-0.2. The optical glass according to any one of Claims 1 to 3, wherein its components are expressed in molar percentages, and Mg ²⁺ /Ba ²⁺ is 0.05 to 0.15. The optical glass according to any one of claims 1 to 3, wherein its components are expressed in mole percentage, and Sr ²⁺ /Y ³⁺ is 0.3 to 10.0. The optical glass according to any one of claims 1 to 3, wherein its components are expressed in mole percentage, and Sr ²⁺ /Y ³⁺ is 0.5 to 5.0. The optical glass according to any one of claims 1 to 3, wherein its components are expressed in mole percentage, and Sr ²⁺ /Y ³⁺ is 0.8 to 3.0. The optical glass according to any one of claims 1 to 3, wherein its components are expressed in mole percentage, and Sr ²⁺ /Y ³⁺ is 1.0 to 2.0. The optical glass according to any one of claims 2 or 3, wherein its composition is represented by mole percentage, (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) 2.0 or less. The optical glass according to any one of claims 2 or 3, wherein its composition is represented by mole percentage, (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) 1.0 or less. The optical glass according to any one of claims 2 or 3, wherein its composition is represented by mole percentage, (Ca ²⁺ +Zn ²⁺ )/(Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ ) 0.5 or less. The optical glass according to any one of claims 2 or 3, wherein its composition is expressed in mole percentage, and (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 2.0 or less. The optical glass according to any one of claims 2 or 3, wherein its composition is expressed in mole percentage, and (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 1.0 or less. The optical glass according to any one of claims 2 or 3, wherein its components are expressed in mole percentage, and (Rn ⁺ +Ca ²⁺ )/Mg ²⁺ is 0.5 or less. The optical glass according to any one of Claims 1-3, wherein its components are represented by mole percentage, and F ^- /O ^2- is 0.18-0.6. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and F ^- /O ^2- is 0.2-0.5. The optical glass as described in any one of claims 1 to 3, wherein its components are expressed in mole percentages, and F ^- /O ^2- is 0.25 to 0.45. The optical glass according to any one of claims 1-3, wherein its components are expressed in mole percentage, and F ^- /O ^2- is 0.28-0.4. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and F ^- /Ba ²⁺ is 0.35-1.2. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, and F ^- /Ba ²⁺ is 0.5-1.1. The optical glass according to any one of Claims 1-3, wherein its components are represented by mole percentage, and F ^- /Ba ²⁺ is 0.65-0.9. The optical glass according to any one of claims 2 or 3, wherein its components are expressed in molar percentages, P ⁵⁺ : 30~40%; and/or La ³⁺ +Gd ³⁺ +Y ³⁺ : 0.1~15%; and/or Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 0.5~10%; and/or R ²⁺ : 35~55%; and/or Al ³⁺ : 8~20%; and/or Rn ⁺ : 0~5%; and/or Yb ³⁺ : 0~5%; and/or Zn ²⁺ : 0~5%; and/or B ³⁺ : 0~5%; and/or Si ⁴⁺ : 0~2%; and/or Ta ⁵⁺ : 0~5%; and/or Sb ³⁺ : 0~0.5%; and/or Sn ⁴⁺ : 0~0.5%; and/or Ce ^{4 +} : 0~0.5%. The optical glass according to any one of claims 2 or 3, wherein its components are expressed in molar percentages, P ⁵⁺ : 33~38%; and/or La ³⁺ +Gd ³⁺ +Y ³⁺ : 0.5~12%; and/or Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 1~8%; and/or R ²⁺ : 38~50%; and/or Al ³⁺ : 10~18%; and/or Rn ⁺ : 0~2%; and/or Yb ³⁺ : 0~2%; and/or Zn ²⁺ : 0~2%; and/or B ³⁺ : 0~2%; and/or Si ⁴⁺ : 0~1%; and/or Ta ⁵⁺ : 0~2%; and/or Sb ³⁺ : 0~0.1%; and/or Sn ⁴⁺ : 0~0.1%; and/or Ce ^{4 +} : 0~0.1%. The optical glass according to any one of claims 2 or 3, wherein its components are expressed in molar percentages, P ⁵⁺ : 33~38%; and/or La ³⁺ +Gd ³⁺ +Y ³⁺ : 1~10%; and/or Nb ⁵⁺ +W ⁶⁺ +Ti ⁴⁺ : 1~8%; and/or R ²⁺ : 38~50%; and/or Al ³⁺ : 10~18%; and/or does not contain Rn ⁺ ; and/or does not contain Yb ³⁺ ; and/or does not contain Zn ²⁺ ; and/or does not contain B ³⁺ ; and/or does not contain Si ⁴⁺ ; and/or does not contain Ta ⁵⁺ ; and/or Sb ³⁺ : 0~0.1%; and/or not containing Sn ⁴⁺ ; and/or not containing Ce ⁴⁺ . The optical glass according to any one of claims 2 or 3, wherein its components are expressed in molar percentages, Ba ²⁺ : 28~45%; and/or Sr ²⁺ : 0~10%; and/or or Mg ²⁺ : 0~10%; and/or Ca ²⁺ : 0~10%; and/or La ³⁺ : 0~10%; and/or Gd ³⁺ : 0~10%; and/or Y ³⁺ : 0~10%; and/or Nb ⁵⁺ : 0~10%; and/or W ⁶⁺ : 0~10%; and/or Ti ⁴⁺ : 0~10%. The optical glass according to any one of claims 2 or 3, wherein its components are expressed in molar percentages, Ba ²⁺ : 30~40%; and/or Sr ²⁺ : 1~8%; and/or or Mg ²⁺ : 1~7%; and/or Ca ²⁺ : 0~6%; and/or La ³⁺ : 0~5%; and/or Gd ³⁺ : 0~5%; and/or Y ³⁺ : 0.5~8%; and/or Nb ⁵⁺ : 0~6%; and/or W ⁶⁺ : 0~6%; and/or Ti ⁴⁺ : 0~5%. The optical glass according to any one of claims 2 or 3, wherein its components are expressed in molar percentages, Ba ²⁺ : 33~38%; and/or Sr ²⁺ : 2~7%; and/or or Mg ²⁺ : 2~6%; and/or Ca ²⁺ : 0~5%; and/or La ³⁺ : 0~3%; and/or Gd ³⁺ : 0~3%; and/or Y ³⁺ : 1~7%; and/or Nb ⁵⁺ : 0~4%; and/or W ⁶⁺ : 0~5%; and/or Ti ⁴⁺ : 0~2%. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, F ⁻ : 15-45%; and/or O ^2- : 55-85%. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, F ⁻ : 18-38%; and/or O ^2- : 62-82%. The optical glass according to any one of claims 1-3, wherein its components are represented by mole percentage, F ⁻ : 21-35%; and/or O ^2- : 65-79%. The optical glass according to any one of claims 1-3, wherein its components are expressed in molar percentages, and the anions also contain: Cl ^- : 0-2%; and/or Br ^- : 0-2%; And/or ^I- : 0~2%. The optical glass according to any one of claims 1-3, wherein the optical glass has a refractive index _nd of 1.57-1.66; and an Abbe number ν _d of 56-65. The optical glass according to any one of claims 1-3, wherein the optical glass has a refractive index _nd of 1.58-1.64; and an Abbe number ν _d of 58-63. The optical glass according to any one of claims 1-3, wherein the optical glass has a refractive index _nd of 1.60-1.63; and an Abbe number ν _d of 59-62. The optical glass according to any one of claims 1 to 3, wherein the optical glass has a ΔP _C,s value of 0 or less; and/or a ΔP _C,t value of -0.01 or less. The optical glass according to any one of claims 1 to 3, wherein the optical glass has a ΔP _C,s value of -0.01 or less; and/or a ΔP _C,t value of -0.02 or less. The optical glass according to any one of claims 1 to 3, wherein the optical glass has a ΔP _C,s value of -0.015 or less; and/or a ΔP _C,t value of -0.03 or less. The optical glass according to any one of claims 1 to 3, wherein the optical glass has a ΔP _C,s value of -0.02 or less; and/or a ΔP _C,t value of -0.05 or less. The optical glass according to any one of claims 1 to 3, wherein, the water resistance stability D _W of the optical glass is more than 3 types; and/or the acid resistance stability D _A is more than 3 types; and/or Or the weather resistance CR is above Class 2; and/or the transition temperature T _g is below 620°C; and/or the density ρ is below 4.60g/cm ³ ; and/or λ ₈₀ is below 380nm; and/or λ ₅ is 330nm the following. The optical glass according to any one of claims 1 to 3, wherein, the water resistance stability D _W of the optical glass is more than 2 types; and/or the acid resistance stability D _A is more than 2 types; and/or Or the weather resistance CR is class 1; and/or the transition temperature _Tg is below 600°C; and/or the density ρ is below 4.40g/cm ³ ; and/or λ ₈₀ is below 370nm; and/or λ ₅ is below 320nm . A glass prefabricated part made of the optical glass described in any one of Claims 1-52. An optical element, which is made of the optical glass as described in any one of claims 1 to 52 or the glass preform as described in claim 53. An optical instrument, which contains the optical glass as described in any one of claims 1 to 52; and/or contains the optical element as described in claim 54.