Optical glass, glass preforms, optical elements and optical instruments

Abstract

The present invention provides an optical glass, the components of the optical glass being expressed in mole percent, and the cation is P 5+ : 26-45%, Al 3+ : 5-25%, R 2+ : Contains 28-60%, and the anion is F - and O 2- Including F - +O 2- is 98% or more, (P 5+ +Al 3+ ) / F - is 0.9 to 4.0, and the R 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+ By rationally designing the components, the optical glass obtained by the present invention has the desired refractive index and Abbe number, and at the same time, ΔP C,s Value and ΔP C,t The value is low and the weather resistance is excellent.

Description

[Technical field]

[0001] The present invention relates to optical glass, and more particularly to optical glass having a refractive index of 1.57 to 1.66 and an Abbe number of 56 to 65, and to a glass preform, an optical element, and an optical device produced from the optical glass. [Background technology]

[0002] In recent years, optical lenses have been widely applied in fields such as vehicle-mounted imaging and surveillance security. In night imaging, the lens absorbs near-infrared light in night black-and-white mode, and the near-infrared band light and visible light are focused at different focal lengths when passing through the lens, resulting in degradation of imaging quality. This poses a challenge to the optical design in vehicle-mounted imaging, surveillance security, and even in fields such as telescopes and gun sights.

[0003] The refractive index of glass decreases with increasing wavelength. Generally, the wavelength range available for nighttime near-infrared auxiliary lighting in imaging systems using visible light image sensors is 800-1000 nm. Research has found that if, within this wavelength range, the range in which the refractive index of glass decreases with increasing wavelength is smaller than that of normal glass, that is, if the glass forms a certain anomalous dispersion in the near-infrared band, it can greatly reduce the difficulty of realizing day-night confocality through optical design and effectively improve nighttime imaging quality. The anomalous dispersion in the near-infrared band is ΔP C,s and ΔP C,t It is expressed using a value.

[0004] The refractive index and Abbe number of optical glass with a refractive index of 1.57 to 1.66 and an Abbe number of 56 to 65 are appropriate and are widely used in various imaging systems. The ΔP of optical glass with a refractive index and Abbe number in this range in the prior art C,s and ΔP C,t The values ​​are relatively large and cannot meet the needs of the development of new imaging optical instruments. For example, patent application number 200780019054.0 discloses an optical glass with a refractive index of 1.55-1.65 and an Abbe number of 55-65.

[0005] On the other hand, optical systems that need to realize day and night confocality are usually used in harsh environments, and the optical materials must have excellent weather resistance to ensure the reliability of the optical system. Therefore, ΔP C,s and ΔP C,t The development of optical glass with relatively low optical resistance and excellent weather resistance plays an important role in the development of the optoelectronic information field. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem that the present invention aims to solve is ΔP C,s and ΔP C,t The object of the present invention is to provide an optical glass having a relatively low value and excellent weather resistance. [Means for solving the problem]

[0007] The technical solutions adopted in the present invention to solve the technical problems are as follows:

[0008] (1) Optical glass, containing the following cations, expressed in mole percent: P 5+ : 26~45%; Al 3+ :5~25%;R 2+ :28~60%. F - and O 2- Contains the anion F - +O 2- is 98% or more, (P 5+ +Al 3+ ) / F - is 0.9 to 4.0, and the R 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+ is the total content.

[0009] (2) The optical glass according to (1), further comprising the following cations, expressed in mole percent: La 3+ +Gd 3+ +Y3+ : 0 to 20% and / or Nb 5+ +W 6+ +Ti 4+ : 0 to 15%, and / or Rn + : 0 to 10%, and / or Yb 3+ : 0 to 10% and / or Zn 2+ : 0 to 10%, and / or B 3+ : 0 to 10% and / or Si 4+ : 0 to 5%, and / or Ta 5+ : 0 to 10% and / or Sb 3+ : 0 to 1% and / or Sn 4+ : 0 to 1%, and / or Ce 4+ : 0 to 1%, and the Rn + Li + , Na + , K + It is one or more of the following.

[0010] (3) Optical glass, the composition of which is expressed in mole percent and which contains the following cations: 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%; F - and O 2- Contains the anion F - +O 2- is 98% or more, and 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+is the total content of Rn + Li + , Na + , K + It is one or more of the following.

[0011] (4) The cation of the component is P 5+ And, Al 3+ And, R 2+ and the anion is F - and O 2- The optical glass has a refractive index n d is 1.57~1.66, Abbe number ν d is 56~65, ΔP C,s Value is 0 or less, ΔP C,t The value is -0.01 or less for optical glass.

[0012] (5) The optical glass according to (4), which contains the following cations, expressed in mole percent: 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 to 10%, B 3+ : 0 to 10%, Si 4+ : 0 to 5%, Ta 5+ : 0-10%, Sb 3+ : 0~1%, Sn 4+ : 0~1%, Ce 4+ : 0 to 1%, and the R 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+ is the total content of Rn + Li + , Na + , K + It is one or more of the following.

[0013] (6) An optical glass according to any one of (1) to (5), comprising the following components in mol %: (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.

[0014] (7) An optical glass according to any one of (1) to (5), comprising the following components in mol %: (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.

[0015] (8) An optical glass according to any one of (1) to (5), comprising the following component in mol %: Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.3 to 1.0, and preferably Y 3+ / (La3+ +Gd 3+ +Y 3+ ) is 0.5 to 1.0, more preferably Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.6 to 1.0, and more preferably Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.65 to 1.0.

[0016] (9) An optical glass according to any one of (1) to (5), comprising the following components in mol %: Mg 2+ / Ba 2+ is 0.01 to 0.3, preferably Mg 2+ / Ba 2+ is 0.02 to 0.25, more preferably Mg 2+ / Ba 2+ is 0.03 to 0.2, more preferably Mg 2+ / Ba 2+ is 0.05~0.15.

[0017] (10) An optical glass according to any one of (1) to (5), comprising the following components in mol %: Sr 2+ / Y 3+ is 0.3 to 10.0, preferably Sr 2+ / Y 3+ is 0.5 to 5.0, more preferably Sr 2+ / Y 3+ is 0.8 to 3.0, and more preferably Sr 2+ / Y 3+ is 1.0~2.0.

[0018] (11) An optical glass according to any one of (1) to (5), comprising the following component in mol %: (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, and more preferably (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) is less than or equal to 0.5.

[0019] (12) An optical glass according to any one of (1) to (5), comprising the following components in mol %: (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, more preferably (Rn + +Ca 2+ ) / Mg 2+ is less than or equal to 0.5.

[0020] (13) An optical glass according to any one of (1) to (5), comprising the following component in mol %: - / O 2- is 0.18 to 0.6, preferably F - / O 2- is 0.2 to 0.5, more preferably F - / O 2- is 0.25 to 0.45, and more preferably F - / O 2- is 0.28~0.4.

[0021] (14) An optical glass according to any one of (1) to (5), comprising the following component in mol %: - / Ba 2+ is 0.35 to 1.2, preferably F - / Ba 2+ is 0.5 to 1.1, more preferably F - / Ba 2+is 0.6 to 1.0, and more preferably F - / Ba 2+ is 0.65~0.9.

[0022] (15) An optical glass according to any one of (1) to (5), comprising the following components in mol %: 5+ : 30 to 40%, preferably P 5+ : 33 to 38%, and / or La 3+ +Gd 3+ +Y 3+ : 0.1 to 15%, preferably La 3+ +Gd 3+ +Y 3+ : 0.5 to 12%, more preferably La 3+ +Gd 3+ +Y 3+ : 1 to 10%, and / or Nb 5+ +W 6+ +Ti 4+ : 0.5 to 10%, preferably Nb 5+ +W 6+ +Ti 4+ : 1 to 8%, and / or R 2+ : 35 to 55%, preferably R 2+ : 38 to 50% and / or Al 3+ : 8 to 20%, preferably Al 3+ : 10 to 18% and / or Rn + : 0 to 5%, preferably Rn + : 0 to 2%, more preferably Rn + and / or Yb 3+ 0 to 5%, preferably Yb 3+ : 0 to 2%, more preferably Yb 3+ and / or Zn 2+ : 0 to 5%, preferably Zn 2+ : 0 to 2%, more preferably Zn 2+ does not contain and / or B 3+ : 0 to 5%, preferably B 3+ : 0 to 2%, more preferably B 3+ Does not contain and / or Si 4+ : 0 to 2%, preferably Si 4+ : 0 to 1%, more preferably Si 4+ and / or Ta5+ 0 to 5%, preferably Ta 5+ 0 to 2%, more preferably Ta 5+ Does not contain and / or Sb 3+ 0 to 0.5%, preferably Sb 3+ : 0 to 0.1% and / or Sn 4+ : 0 to 0.5%, preferably Sn 4+ : 0 to 0.1%, more preferably Sn 4+ Does not contain and / or Ce 4+ : 0 to 0.5%, preferably Ce 4+ : 0 to 0.1%, more preferably Ce 4+ The point is that it does not include

[0023] (16) An optical glass according to any one of (1) to (5), comprising the following components in mol %: Ba 2+ : 28 to 45%, preferably Ba 2+ : 30 to 40%, more preferably Ba 2+ : 33-38% and / or Sr 2+ : 0 to 10%, preferably Sr 2+ : 1 to 8%, more preferably Sr 2+ : 2 to 7% and / or Mg 2+ : 0 to 10%, preferably Mg 2+ : 1 to 7%, more preferably Mg 2+ : 2 to 6% and / or Ca 2+ : 0 to 10%, preferably Ca 2+ : 0 to 6%, more preferably Ca 2+ : 0 to 5%, and / or La 3+ : 0 to 10%, preferably La 3+ : 0 to 5%, more preferably La 3+ : 0 to 3%, and / or Gd 3+ : 0 to 10%, preferably Gd 3+ : 0 to 5%, more preferably Gd 3+ : 0 to 3%, and / or Y 3+ : 0 to 10%, preferably Y 3+ : 0.5 to 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 to 6%, more preferably W 6+ : 0 to 5% and / or Ti 4+ 0 to 10%, preferably Ti 4+ 0 to 5%, preferably Ti 4+ 0 to 2%, more preferably Ti 4+ The point is that it does not include

[0024] (17) An optical glass according to any one of (1) to (5), comprising the following component in mol %: - : 15 to 45%, preferably F - : 18 to 38%, more preferably F - : 21-35% and / or O 2- : 55 to 85%, preferably O 2- : 62 to 82%, more preferably O 2- :65~79%.

[0025] (18) Components expressed in mole percent and further including the following anions: Cl - : 0 to 2%, and / or Br - : 0 to 2%, and / or I - : 0 to 2%, preferably further containing the following anions: Cl - : 0 to 1%, and / or Br - : 0 to 1%, and / or I - : 0 to 1%, more preferably further containing the following anions: Cl - : 0 to 0.5%, and / or Br - : 0 to 0.5%, and / or I - : 0 to 0.5%, the optical glass according to any one of (1) to (5).

[0026] (19) The refractive index n of the optical glass d is 1.57 to 1.66, preferably the refractive index n d is 1.58 to 1.64, more preferably the refractive index n d is 1.60~1.63, Abbe number ν dis 56 to 65, preferably the Abbe number ν d is 58 to 63, and more preferably, the Abbe number ν d The optical glass according to any one of (1) to (5), wherein the refractive index is 59 to 62.

[0027] (20) ΔP of the optical glass C,s The value is 0 or less, preferably ΔP C,s Value is -0.01 or less, more preferably ΔP C,s A value of -0.015 or less, and more preferably ΔP C,s Value is less than or equal to -0.02 and / or ΔP C,t The value is -0.01 or less, preferably ΔP C,t A value of -0.02 or less is preferable, and ΔP C,t Value is -0.03 or less, and more preferably ΔP C,t A value of -0.04 or less, and even more preferably ΔP C,t The optical glass according to any one of (1) to (5), wherein the value is −0.05 or less.

[0028] (21) Water resistance stability D of the optical glass W Class 3 or higher, preferably water resistance D W Class 2 or higher and / or acid resistance D A Class 3 or higher, preferably acid resistance D A is 2 or more, and / or the weather resistance CR is 2 or more, preferably the weather resistance CR is 1, and / or the transition temperature T g is 620°C or less, preferably the transition temperature T g is 610°C or less, more preferably the transition temperature T g is 600°C or less, and / or density ρ is 4.60g / cm 3 Preferably, the density ρ is 4.50 g / cm or less. 3 More preferably, the density ρ is 4.40 g / cm or less. 3 Below, and / or λ 80 is 380 nm or less, preferably λ 80 is 375 nm or less, more preferably λ 80The optical glass according to any one of (1) to (5), wherein λ5 is 370 nm or less, and / or λ5 is 330 nm or less, preferably λ5 is 325 nm or less, and more preferably λ5 is 320 nm or less.

[0029] (22) A glass preform produced from the optical glass according to any one of (1) to (21).

[0030] (23) An optical element produced from the optical glass according to any one of (1) to (21) or the glass preform according to (22).

[0031] (24) An optical instrument comprising the optical glass according to any one of (1) to (21) and / or the optical element according to (23). Effect of the Invention

[0032] The beneficial effects of the present invention are as follows: By rationally designing the components, the optical glass obtained by the present invention has a desired refractive index and Abbe number, and at the same time, ΔP C,s Value and ΔP C,t The value is relatively low, and weather resistance is excellent. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Hereinafter, the embodiments of the optical glass according to the present invention will be described in detail, but the present invention is not limited to the embodiments described below, and can be practiced with appropriate modifications within the scope of the object of the present invention. Furthermore, although some omissions are made, the gist of the present invention is not limited by the repetition of the description, and hereinafter, the optical glass of the present invention may be simply referred to as glass.

[0034] <Optical glass> The range of each component constituting the optical glass of the present invention will be described below.Unless otherwise specified in this specification, the content of a cation component is expressed as the molar percentage (mol%) of the cation component relative to the entire cation components, the content of an anion component is expressed as the molar percentage (mol%) of the anion component relative to the entire anion components, the ratio between the contents of the cation components is the molar percentage content ratio between the contents of each cation component, the ratio between the contents of the anion components is the molar percentage content ratio between the contents of each anion component, and the ratio between the contents of anion cation components is the molar percentage content ratio between the molar percentage content of the cation components in the entire cation components and the molar percentage content of the anion components in the entire anion components.

[0035] Specifically, the numerical ranges described herein include upper and lower limits, and the terms "greater than or equal to" and "less than or equal to" include the endpoints, and all integers and fractions subsumed within the range, but are not limited to the specific values ​​set forth when the range is limited. As used herein, "and / or" is inclusive, e.g., "A and / or B" means A only, B only, or both A and B.

[0036] The ionic valences of each component described below are representative values ​​used for convenience, and are not distinguished from other ionic valences. The ionic valences of each component of optical glass may be other than the representative values. For example, P is normally present in glass in a +5 ionic valence state, so in this patent, it is referred to as "P 5+ " is representative, however, other ionic valence states may exist and are also covered by this patent.

[0037] <Cationic components> P 5+ is a glass network former, which enhances the stability of glass and increases the △P C,t Value and △P C,s However, when its content is less than 26%, the above-mentioned effect is not obvious, the stability of the glass is reduced, and the crystallization tendency is increased. Therefore, in the present invention, P 5+The content of is 26% or more, preferably 30% or more, and more preferably 33% or more. 5+ If the content of P exceeds 45%, the weather resistance of the glass decreases, making it difficult to obtain the desired optical constants of the present invention. 5+ In some embodiments, the content of P is about 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%, 45%. 5+ may include.

[0038] Al 3+ Al is a 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. However, if its content is less than 5%, it is not possible to form a stable glass skeleton and obtain the above-mentioned effects. 3+ If the content of Al exceeds 25%, the glass transition temperature and liquidus temperature will rise, making it difficult to melt the glass, while at the same time increasing the forming temperature, causing the glass to volatilize violently, resulting in poor glass stripes, and making press forming difficult due to the high transition temperature. 3+ In some embodiments, the content of Al is about 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%. 3+may include.

[0039] La 3+ can increase the refractive index of glass and improve its acid resistance, but La 3+ If the content of La is too high, the thermal stability and resistance to devitrification of the glass are reduced, and the glass is easily devitrified during production. 3+ In some embodiments, the La content is about 0%, more 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%. 3+ may include.

[0040] Gd 3+ Although Gd can improve the chemical stability of glass and increase the refractive index, if its content exceeds 10%, the glass transition temperature increases and its stability decreases. Therefore, in the present invention, Gd 3+ In some embodiments, the content of Gd is about 0%, more 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%. 3+ may include.

[0041] Y 3+ It has a high refractive index, low dispersion, improves the wear resistance of glass, and reduces the △P of glass. C,t Value and △P C,s However, if the content exceeds 10%, the glass tends to devitrify. 3+ In some embodiments, the content of Y is about 0%, more 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%.3+ may include.

[0042] In some embodiments of the present invention, La 3+ , Gd 3+ , Y 3+ The total content of La 3+ +Gd 3+ +Y 3+ By controlling La to 20% or less, the optical constants of the glass can be prevented from exceeding the design requirements. 3+ +Gd 3+ +Y 3+ is 20% or less. 3+ , Gd 3+ , Y 3+ The total content of La 3+ +Gd 3+ +Y 3+ By setting the content within the range of 0.1 to 15%, it is easy to obtain the desired optical constants and at the same time, the chemical stability of the glass can be improved. Therefore, it is more preferable to set the content of La within the range of 0.1 to 15%. 3+ +Gd 3+ +Y 3+ is 0.1 to 15%, and more preferably La 3+ +Gd 3+ +Y 3+ More preferably, La 3+ +Gd 3+ +Y 3+ 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%.

[0043] In some embodiments of the present invention, Y 3+ / (La 3+ +Gd 3+ +Y3+ By controlling Y to be within the range of 0.3 to 1.0, the weather resistance of the glass can be optimized and the light transmittance of the glass can be increased. 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.3 to 1.0, more preferably Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.5 to 1.0, and more preferably Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.6 to 1.0, and more preferably Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.65 to 1.0. In some embodiments, Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) can have values ​​of 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.

[0044] Yb 3+ Although Yb can increase the refractive index of the glass, if its content is too high, the thermal stability and devitrification resistance of the glass are reduced. 3+ The content of is 10% or less, preferably 5% or less, more preferably 2% or less, and further preferably Yb 3+ In some embodiments, the amount of Yb is about 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%. 3+ may include.

[0045] W 6+ increases the refractive index and dispersion of the glass, and the glass transition temperature, △P C,t Value and △P C,sHowever, if its content exceeds 10%, the coloring degree of the glass will be poor, the refractive index will easily exceed the design requirements, and the wear resistance will be poor. Therefore, W 6+ In some embodiments, the content of W is about 0%, more 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%. 6+ may include.

[0046] Nb 5+ increases the refractive index and dispersion of the glass, and the △P C,t and △P C,s However, if its content exceeds 10%, the devitrification resistance of the glass decreases and the coloring degree deteriorates. Therefore, Nb 5+ In some embodiments, the content of Nb is about 0%, more 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%. 5+ may include.

[0047] Ti 4+ improves the chemical stability of glass and the △P C,t and △P C,s However, if the content is too high, the glass tends to crystallize, the coloring degree deteriorates, and the melting property of the glass decreases. 4+ The content of Ti is 10% or less, preferably 5% or less, and more preferably 2% or less. 4+ In some embodiments, the Ti content is about 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%.4+ may include.

[0048] In some embodiments of the present invention, Nb 5+ , W 6+ and Ti 4+ The total content of Nb 5+ +W 6+ +Ti 4+ By making Nb 15% or less, the refractive index and Abbe number of the glass exceed the design requirements, and the deterioration of the devitrification resistance and the deterioration of the coloring degree can be prevented. 5+ +W 6+ +Ti 4+ is 15% or less. 5+ +W 6+ +Ti 4+ By increasing the content to 0.5% or more, the △P C,t Value and △P C,s Therefore, it is more preferable to use Nb 5+ +W 6+ +Ti 4+ is 0.5 to 10%, and more preferably Nb 5+ +W 6+ +Ti 4+ 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%.

[0049] As a result of extensive experimental work by the inventors, in some embodiments of the present invention, Nb 5+ , W 6+ and Ti 4+ The total content of Nb 5+ +W 6+ +Ti 4+ And, La 3+ , Gd 3+ and Y 3+ The total content of La 3+ +Gd3+ +Y 3+ Ratio to (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+ ) to 0.1 to 10.0, the optical constants of the glass are kept within the desired range, and at the same time, the △P C,t Value and △P C,s It has been found that the value of Nb can be reduced and the chemical stability of the glass can be optimized. 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, (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+) values ​​are 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, 2.1. It can be 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, 10.0.

[0050] In the present invention, 28 to 60% of the alkaline earth metal component R 2+ (R 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+ The addition of R (total content of R) improves the thermal stability of the glass and adjusts the optical constants of the glass. 2+ The content of R is preferably 35 to 55%, more preferably R 2+ In some embodiments, the content is about 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%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 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%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, 101%, 102%, 103%, 104%, 105%, 106%, 107%, 108%, 109%, 109.5%, 110%, 111%, 112%, 113%, 114%, 115%, 116%, 117%, 118.5%, 119%, 120 .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%, 60% R 2+ may include.

[0051] Ba 2+ Ba can increase the refractive index, thermal stability and weather resistance of the glass. In the present invention, Ba is used at 28% or more. 2+The above effects can be obtained by adding Ba. 2+ If the content of Ba exceeds 45%, the glass transition temperature and density increase, and the abrasion resistance deteriorates. 2+ In some embodiments, the Ba content is about 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%. 2+ may include.

[0052] Sr 2+ Sr can reduce the thermal expansion coefficient of the glass and effectively adjust the refractive index and density of the glass, but if its content is too high, the devitrification resistance and chemical stability of the glass will decrease. 2+ In some embodiments, the content of Sr is about 0%, more 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%. 2+ may include.

[0053] In some embodiments of the present invention, Sr 2+ and Y 3+ Relative content of Sr 2+ / Y 3+ By controlling the content of Sr within the range of 0.3 to 10.0, the glass transition temperature and density can be lowered. 2+ / Y 3+ is 0.3 to 10.0, more preferably Sr 2+ / Y 3+ is 0.5 to 5.0. Furthermore, Sr 2+ / Y 3+By setting Sr in the range of 0.8 to 3.0, the crystallization resistance of the glass can be further improved. 2+ / Y 3+ is 0.8 to 3.0, and even more preferably Sr 2+ / Y 3+ In some embodiments, Sr 2+ / Y 3+ The values ​​of 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, 10.0.

[0054] Mg 2+ Although Mg can improve the abrasion resistance and devitrification resistance of the glass, if its content exceeds 10%, the stability of the glass decreases. Therefore, in the present invention, Mg 2+ In some embodiments, the content of Mg is about 0%, more 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%. 2+ may include.

[0055] In some embodiments of the present invention, Mg 2+ and Ba 2+ Ratio of Mg content to 2+ / Ba 2+ By setting the range of Mg to 0.01 to 0.3, the abrasion resistance of the glass can be optimized and the chemical stability of the glass can be improved. 2+ / Ba 2+ is 0.01 to 0.3, more preferably Mg 2+ / Ba 2+is 0.02 to 0.25, more preferably Mg 2+ / Ba 2+ is 0.03 to 0.2, and even more preferably Mg 2+ / Ba 2+ In some embodiments, Mg 2+ / Ba 2+ The values ​​of 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, 0.3.

[0056] Ca 2+ Ba can enhance the chemical stability of glass and improve the polishing performance of glass. 2+ However, if the content is too high, the devitrification resistance of the glass deteriorates. 2+ In some embodiments, the content of Ca is about 0%, more 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%. 2+ may include.

[0057] Rn + (Rn + Li + , Na + , K + Rn can lower the glass transition temperature and refractive index and improve the press workability of the glass, but if its content is too high, the stability and weather resistance of the glass will decrease. Therefore, in the present invention, Rn + The content of Rn is 10% or less, preferably 5% or less, and more preferably 2% or less. In some embodiments, it is more preferable that Rn +In some embodiments, the Rn concentration is about 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%. + may include.

[0058] The present invention is the result of a large amount of experimental work, and in some embodiments, + +Ca 2+ ) / Mg 2+ By controlling the glass density, △P C,t Value and △P C,s It has been found that the value can be reduced and the degree of wear of the glass can be optimized. Therefore, it is preferable to use (Rn + +Ca 2+ ) / Mg 2+ is 2.0 or less, more preferably (Rn + +Ca 2+ ) / Mg 2+ is 1.0 or less, more preferably (Rn + +Ca 2+ ) / Mg 2+ is 0.8 or less, and even more preferably (Rn + +Ca 2+ ) / Mg 2+ is 0.5 or less. In some embodiments, (Rn + +Ca 2+ ) / Mg 2+ The values ​​of can be 0, >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, 2.0.

[0059] Zinc 2+ Although Zn can lower the glass transition temperature and increase the thermal stability of the glass, if its content exceeds 10%, the dispersion of the glass increases, making it difficult to obtain the desired optical constants and decreasing the devitrification resistance of the glass. 2+ The content of Zn is limited to 10% or less, preferably 5% or less, and more preferably 2% or less. In some embodiments, it is further preferred that Zn2+ In some embodiments, the amount of Zn is about 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%. 2+ may include.

[0060] The present invention is the result of a large amount of experimental work, and in some embodiments, 2+ and Zn 2+ Total content of Ca 2+ +Zn 2+ and Nb 5+ , W 6+ , Ti 4+ The total content of Nb 5+ +W 6+ +Ti 4+ Ratio to (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) to 2.0 or less, the glass has a lower △P C,t Value and △P C,s At the same time as obtaining the value, the crystallization resistance of the glass can be optimized. Therefore, it is preferable to use (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, (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ By making the (Ca) equal to or less than 0.8, the degree of bubbles in the glass can be further optimized and the thermal expansion coefficient of the glass can be reduced. Therefore, it is more preferable to make the (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+) is 0.8 or less, and even more preferably (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) is 0.5 or less. In some embodiments, (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) can have a value of 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, 2.0.

[0061] S 4+ Although Si can increase the devitrification resistance of the glass, reduce the abrasion resistance of the glass, and improve the processability, if its content exceeds 5%, the melting performance of the glass decreases. 4+ The content of is 5% or less, preferably 2%, more preferably 1% or less, and further preferably Si 4+ In some embodiments, the concentration is about 0%, greater than 0%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5% Si. 4+ may include.

[0062] B 3+ can increase the devitrification resistance of the glass, but in optical glass containing fluorine, it is highly volatile when the glass is melted, making the optical constants of the glass unstable and causing stripes. 3+ The content of is limited to 10% or less, preferably 5% or less, more preferably 2% or less, and even more preferably B 3+ In some embodiments, the solubility of the glycerol in the glycerol-containing medium is about 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% B. 3+ may include.

[0063] Ta5+ Ta can increase the refractive index of glass, but if its content is high, the glass is prone to devitrification. 5+ The content of is 10% or less, preferably 5% or less, more preferably 2% or less, and ΔP of the glass is C,t Value and △P C,s More preferably, Ta 5+ In some embodiments, the amount of Ta is about 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%. 5+ may include.

[0064] The glass of the present invention contains Sb 3+ , Sn 4+ , Ce 4+ The component may contain one or more of the above-mentioned elements as a fining agent. 3+ When the Sb content exceeds 1%, the clarity of the glass tends to decrease, and at the same time, its strong oxidizing effect accelerates the deterioration of the molding die. 3+ The content of Sn is 1% or less, preferably 0.5% or less, and more preferably 0.1% or less. 4+ Sn can be used as a fining agent, but if its content exceeds 1%, the glass will become colored, and when the glass is heated, softened, and reshaped by pressing, etc., the Sn content is reduced. 4+ This tends to cause crystal nucleation and devitrification. 4+ The content of is 1% or less, preferably 0.5% or less, more preferably 0.1% or less, and further preferably Sn 4+ It does not contain Ce. 4+ The effect and content of Sn 4+ The content is equal to or less than 1%, preferably equal to or less than 0.5%, more preferably equal to or less than 0.1%, and even more preferably equal to Ce. 4+In some embodiments, the Sb content is about 0%, greater than 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%. 3+ Japanese / Sn 4+ Japanese / Ce 4+ may include.

[0065] <Anion components> In the glass of the present invention, F - and O 2- The total content of F - +O 2- By increasing the glass thickness to 98% or more, the glass has excellent stability and the △P C,t and △P C,s The value can be reduced, preferably F - +O 2- is 98.5% or more, more preferably F - +O 2- More preferably, F - +O 2- 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%, 100%.

[0066] F - It has obvious effect on reducing the refractive index temperature coefficient and transition temperature of glass, and increasing the Abbe number, △P C,t Value and △P C,s If its content is less than 15%, the above effect is not obvious. Therefore, it is preferable to use F - The content of F is 18% or more, and more preferably F - The content of F is 21% or more. -If the content of fluorine is too high, the refractive index of the glass decreases, the stability of the glass decreases, and the thermal expansion coefficient of the glass increases. In particular, the volatilization of fluorine during melting pollutes the environment and makes the internal composition of the glass non-uniform. - In some embodiments, the content of F is limited to about 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%, 45%. - may include.

[0067] The optical glass of the present invention is O 2- In particular, it contains 55% or more O 2- The addition of O can improve the stability and weather resistance of the glass, and suppress the deterioration of the glass abrasion rate and the deterioration of the stripes. 2- By controlling the content of O to 85% or less, it is possible to prevent the viscosity and melting temperature of the glass from increasing at high temperatures. 2- In some embodiments, the O content is about 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%. 2- may include.

[0068] In the present invention, 2% or less of Cl is used as a fining agent. - The defoaming effect of glass can be improved by adding -In some embodiments, the Cl content is about 0%, more 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%, 2%. - may include.

[0069] In some embodiments of the present invention, F - and O 2- Relative content of F - / O 2- By controlling F within the range of 0.18 to 0.6, the stability and thermal stability of the glass can be improved and the light transmittance of the glass can be optimized. - / O 2- is 0.18 to 0.6, more preferably F - / O 2- is 0.2 to 0.5, and more preferably F - / O 2- is 0.25 to 0.45, and even more preferably F - / O 2- In some embodiments, F - / O 2- The values ​​of 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, 0.59, 0.6.

[0070] In some embodiments of the present invention, F - / Ba 2+ By keeping the value in the range of 0.35 to 1.2, the △P value of the glass C,t Value and △P C,s At the same time, a lower transition temperature can be obtained by lowering the value of F.- / Ba 2+ is 0.35 to 1.2, more preferably F - / Ba 2+ is 0.5 to 1.1, and more preferably F - / Ba 2+ is 0.6 to 1.0, and even more preferably F - / Ba 2+ In some embodiments, F - / Ba 2+ The values ​​of are 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, 0.59, 0 .6, 0.61, 0.63, 0.65, 0.67, 0.7, 0.73, 0.75, 0.77, 0.8, 0.83, 0.85, 0.87, 0.9, 0.93, 0.95, 0.97, 1.0, 1.03, 1.05, 1.07, 1.1, 1.13, 1.15, 1.17, 1.2.

[0071] In some embodiments of the present invention, preferably (P 5+ +Al 3+ ) / F - is set within the range of 0.9 to 4.0, the devitrification resistance and weather resistance of the glass can be improved, and volatilization of fluorine can be suppressed. 5+ +Al 3+ ) / F - is 1.0 to 3.5, and more preferably (P 5+ +Al 3+ ) / F - is 1.2 to 3.0, and even more preferably (P 5+ +Al 3+ ) / F - In some embodiments, (P 5+ +Al 3+ ) / F -The values ​​are: 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, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.14, 3.15, 3.16, 3.17, 3.18, 3.19, 3.20, 3.21, 3.22, 3.23, 3.24, 3.25, 3.26, 3.27, 3.28, 3.29, 3.30, 3.31, 3.32, 3.33, 3.34, 3.35, 3.36, 3.37, 3.38, 3.39, 3.40, 3.41, 3.42, 3.43, 3.44, 3.45, 3.46, 3.47, 3.48, 3.49, 3.50, 3.51, 3.52, 3.5 5, 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, 4.0.

[0072] <Other ingredients> Zr may be added as necessary within a range that does not impair the properties of the optical glass of the present invention. 4+ , Ge 4+ , Bi 3+ , Te 4+ , Br - , I - Other components such as Ta may be added to the optical glass of the present invention. In some embodiments, the Ta 5+ , Ge 4+ , Bi 3+ , Te 4+ The total content or each content of Br in the optical glass of the present invention is preferably 5% or less, more preferably 3% or less, even more preferably 1% or less, and even more preferably none. - , I - The total content or each content of is preferably 2% or less, more preferably 1% or less, even more preferably 0.5% or less, and even more preferably zero.

[0073] <Ingredients that should not be included> Components such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo, when added alone or in combination in small amounts, color the glass, cause absorption at specific wavelengths in the visible light region, and have the property of reducing the visible light transmittance improving effect of the present invention. Therefore, optical glasses that are particularly required to have transmittance at wavelengths in the visible light region preferably do not actually contain the above-mentioned components.

[0074] In recent years, there has been a trend to restrict the use of As, Pb, Th, Cd, Tl, Os, Be and Se components as harmful chemicals, and environmental protection efforts are required not only in the glass manufacturing process, but also in the processing process and post-production treatment. Therefore, when the impact on the environment is important, it is preferable that they are not included except for unavoidable contamination. This makes the optical glass free of substances that actually pollute the environment. Therefore, the optical glass of the present invention can be manufactured, processed and disposed of without taking special environmental measures.

[0075] The terms "free" and "0%" used in this specification mean that the corresponding component was not intentionally added as a raw material for the glass of the present invention. However, as raw materials and / or equipment for manufacturing optical glass, impurities or components that are not intentionally added may exist in small or trace amounts in the final glass, and these are also covered by the patent of this invention.

[0076] The characteristics of the optical glass of the present invention will be described below.

[0077] <Refractive index and Abbe number> The refractive index of optical glass (n d ) and Abbe number (ν d ) has been tested in accordance with the method specified in GB / T 7962.1-2010.

[0078] In some embodiments, the refractive index (n d ) is 1.57, preferably 1.58, and more preferably 1.60, and in some embodiments, the refractive index (nd ) has an upper limit of 1.66, preferably 1.64, and more preferably 1.63.

[0079] In some embodiments, the refractive index (n d ) 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, 1.66.

[0080] In some embodiments, the Abbe number (ν d ) is 56, preferably 58, and more preferably 59. In some embodiments, the Abbe number (ν d ) is 65, preferably 63, and more preferably 62.

[0081] In some embodiments, the Abbe number (ν d ) can 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, 65.

[0082] <Water resistance stability> Water resistance stability of optical glass (D W ) (powder method) is tested according to the method specified in GB / T 17129.

[0083] In some embodiments, the water resistance stability (D W ) is class 3 or more, preferably class 2 or more.

[0084] <Acid resistance stability> Acid resistance stability of optical glass (D A ) (powder method) is tested according to the method specified in GB / T 17129.

[0085] In some embodiments, the acid resistance stability (D A ) is class 3 or more, preferably class 2 or more.

[0086] <Weather resistance> The weatherability (CR) of optical glass is tested according to the following method. The glass sample is placed in a test box with a saturated water vapor environment of 90% relative humidity, and circulated alternately at 40-50°C every hour for 15 cycles. The type of weather resistance is classified according to the amount of turbidity change before and after the sample is placed in the test box, and Table 1 is a list of weather resistance classifications.

[0087] [Table 1]

[0088] In some embodiments, the weather resistance (CR) of the optical glass of the present invention is Class 2 or higher, and preferably Class 1.

[0089] <Transition temperature> Transition temperature of optical glass (T g ) is tested in accordance with the method specified in GB / T7962.16-2010.

[0090] In some embodiments, the transition temperature (T g ) is 620°C or less, preferably 610°C or less, and more preferably 600°C or less.

[0091] <density> The density (ρ) of optical glass is tested according to the method specified in GB / T7962.20-2010.

[0092] In some embodiments, the density (ρ) of the optical glass of the present invention is 4.60 g / cm 3 Less than 4.50 g / cm 3 Less than or equal to 4.40 g / cm 3 The following is the result.

[0093] <Coloring degree> The short-wave transmission spectrum characteristics of the optical glass of the present invention are coloration degree (λ 80 / λ5). 80 λ refers to the corresponding wavelength when the glass transmittance reaches 80%, and λ5 refers to the corresponding wavelength when the glass transmittance reaches 5%. Here, λ 80 is a measurement of the spectral transmittance in the wavelength range from 280 nm to 700 nm using a glass having two optically polished relative flat surfaces parallel to each other and a thickness of 10±0.1 mm, and indicates the wavelength at which the transmittance is 80%. The spectral transmittance or transmittance is measured by measuring the intensity I in The light with intensity I is incident on the glass and reflected from another plane. out When emitting light of I out / I in This quantity is expressed as: and includes the transmittance of the surface reflection losses on said surfaces of the glass. The higher the refractive index of the glass, the higher the surface reflection losses. Thus, for high refractive index glasses, λ 80 The smaller the value, the less coloring there is in the glass itself.

[0094] In some embodiments, the λ 80 is 380 nm or less, preferably λ 80 is 375 nm or less, more preferably λ 80 is less than 370 nm.

[0095] In some embodiments, the optical glasses of the present invention have a λ5 of 330 nm or less, preferably a λ5 of 325 nm or less, and more preferably a λ5 of 320 nm or less.

[0096] <ΔP C,s and ΔP C,t Value> ΔP of optical glass C,s and ΔP C,t The value is the N of glass according to the method specified in GB / T 7962.1-2010. F , N C , N s , N t The value is measured and calculated using 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

[0097] In some embodiments, the ΔP of the optical glass of the present invention C,s The value is 0 or less, preferably -0.01 or less, more preferably -0.015 or less, and even more preferably -0.02 or less.

[0098] In some embodiments, the ΔP of the optical glass of the present invention C,t The value is −0.01 or less, preferably −0.02 or less, more preferably −0.03 or less, even more preferably −0.04 or less, and even more preferably −0.05 or less.

[0099] <Manufacturing method> The manufacturing method of the optical glass of the present invention is as follows: The glass of the present invention is manufactured by conventional raw materials and conventional processes such as carbonates, nitrates, sulfates, hydroxides, oxides, fluorides, phosphates, and metaphosphates, and after mixing by a conventional method, the prepared furnace material is put into a melting furnace (platinum crucible with a lid, platinum alloy crucible, etc.) at 850 to 1200 ° C. and melted. Then, it is clarified and homogenized to obtain a homogeneous molten glass without bubbles or unmelted materials, and this molten glass is cast into a mold and annealed. Those skilled in the art can appropriately select the raw materials, manufacturing methods, and process parameters according to actual needs.

[0100] <Glass preforms and optical elements> A glass preform can be produced from the produced optical glass using press molding means such as polishing, hot press molding, precision press molding, etc. That is, an optical preform can be produced from the optical glass by mechanical processing such as grinding or polishing, or a blank for press molding can be produced from the optical glass, and this blank can be hot press molded and then polished to produce an optical preform, or the blank produced by polishing can be precision press molded to produce an optical preform.

[0101] It should be noted that the means for producing the optical preform is not limited to the above-mentioned means. As described above, the optical glass of the present invention is useful for various optical elements and optical designs, and it is particularly preferable to form a blank from the optical glass of the present invention and use this blank to carry out hot press molding, precision press molding, etc. to produce optical elements such as lenses and prisms.

[0102] The optical preform and optical element of the present invention are both formed from the optical glass of the present invention. The optical preform of the present invention has the excellent properties of optical glass, and the optical element of the present invention has the excellent properties of optical glass, making it possible to provide optical elements such as various lenses and prisms with high optical value.

[0103] Examples of lenses include various lenses, such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens, each of which has a spherical or aspheric lens surface.

[0104] <Optical equipment> Optical elements formed from the optical glass of the present invention can be used to fabricate optical instruments such as photographic devices, imaging devices, display devices, and monitoring devices.

[0105] [Example] <Optical glass examples> In order to further clearly illustrate the technical solutions of the present invention, the following non-limiting examples are provided.

[0106] In the present examples, the above-mentioned optical glass manufacturing method was used to obtain optical glasses having the components shown in Tables 2 to 4. In addition, the properties of each glass were measured by the test methods described in the present invention, and the results are shown in Tables 2 to 4.

[0107] [Table 2-1]

[0108] [Table 2-2]

[0109] [Table 3-1]

[0110] [Table 3-2]

[0111] [Table 4-1]

[0112] [Table 4-2]

[0113] <Glass preform example> The glasses obtained in Tables 2 to 4 of the optical glass examples are subjected to polishing processing means or press molding means such as hot press molding and precision press molding to manufacture 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.

[0114] <Optical element examples> These preforms obtained in the above glass preform examples are annealed to fine-tune the refractive index while reducing the stress within the glass so that the optical properties, such as the refractive index, reach the desired values.

[0115] Each preform is then 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. An anti-reflective coating can also be applied to the surfaces of the obtained optical elements.

[0116] <Optical equipment examples> The optical elements manufactured according to the above optical element embodiments can be used in imaging devices, sensors, microscopes, medical technology, digital projection, communications, optical communication technology / information transmission, optics / illumination in automotive fields, photolithography technology, excimer lasers, wafers, computer chips and integrated circuits and electronic devices containing such circuits and chips by using one or more optical elements to form optical parts or components according to optical design.

Claims

1. Optical glass with the following cations, expressed in mole percent: 5+ : 26-45% Al 3+ : 5-25%; R 2+ :28~60% F - and O 2- Contains the anion F - +O 2- is 98% or more, Mg 2+ / Ba 2+ is 0.01 to 0.3, and Sr 2+ / Y 3+ is 0.3 to 10.0, (P 5+ +Al 3+ ) / F - is 0.9 to 4.0, (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+ ) is 0.1 to 10.0, 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+ is the total content.

2. 2. The optical glass according to claim 1, further comprising the following cations, expressed in mole percent: La 3+ +Gd 3+ +Y 3+ : 0 to 20%, and / or Nb 5+ +W 6+ +Ti 4+ : 0 to 15%, and / or Rn + : 0 to 10%, and / or Yb 3+ : 0 to 10% and / or Zn 2+ : 0-10%, and / or B 3+ : 0 to 10% and / or Si 4+ : 0 to 5%, and / or Ta 5+ : 0-10% and / or Sb 3+ : 0-1% and / or Sn 4+ : 0 to 1%, and / or Ce 4+ : 0 to 1%, and the Rn + Li + , Na + , K + It is one or more of the following.

3. Optical glass with the following cations, expressed in mole percent: 5+ : 26-45%; La 3+ +Gd 3+ +Y 3+ : Over 0 to 20% Al 3+ : 5-25%; R 2+ : 28-60%; Nb 5+ +W 6+ +Ti 4+ : More than 0 to 15%; Rn + : 0-10%; Yb 3+ : 0-10% Zn 2+ : 0-10%; B 3+ : 0-10%; Si 4+ : 0 to 5%; Ta 5+ : 0-10%; Sb 3+ : 0-1%; Sn 4+ : 0-1% Ce 4+ : 0-1%; F - and O 2- Contains the anion F - +O 2- is 98% or more, Mg 2+ / Ba 2+ is 0.01 to 0.3, and Sr 2+ / Y 3+ is 0.3 to 10.0, (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+ ) is 0.1 to 10.0, 2+ Ba 2+ , Sr 2+ , Ca 2+ and Mg 2+ is the total content of Rn + Li + , Na + , K + It is one or more of the following.

4. The optical glass according to any one of claims 1 to 3, comprising the following components in mol %: (P 5+ +Al 3+ ) / F - is between 0.9 and 4.0, and / or F - / O 2- is between 0.18 and 0.6, and / or F - / Ba 2+ is 0.35 to 1.

2.

5. The optical glass according to any one of claims 1 to 3, comprising the following components in mol %: (P 5+ +Al 3+ ) / F - is between 1.0 and 3.5, and / or F - / O 2- is between 0.2 and 0.5, and / or F - / Ba 2+ is between 0.5 and 1.

1.

6. The optical glass according to any one of claims 1 to 3, comprising the following components in mol %: (P 5+ +Al 3+ ) / F - is 1.2 to 3.0, and / or F - / O 2- is between 0.25 and 0.45, and / or F - / Ba 2+ is between 0.6 and 1.

0.

7. The optical glass according to any one of claims 1 to 3, comprising the following components in mol %: (P 5+ +Al 3+ ) / F - is between 1.5 and 2.5, and / or F - / O 2- is between 0.28 and 0.4, and / or F - / Ba 2+ is 0.65 to 0.

9.

8. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.3 to 1.0, and / or (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) is 2.0 or less, and / or (Rn + +Ca 2+ ) / Mg 2+ is less than or equal to 2.

0.

9. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+ ) is between 0.2 and 6.0, and / or Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.5 to 1.0, and / or Mg 2+ / Ba 2+ is 0.02 to 0.25, and / or Sr 2+ / Y 3+ is 0.5-5.0, and / or (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) is 1.0 or less, and / or (Rn + +Ca 2+ ) / Mg 2+ is less than or equal to 1.

0.

10. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+ ) is between 0.5 and 4.0, and / or Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.6 to 1.0, and / or Mg 2+ / Ba 2+ is 0.03 to 0.2, and / or Sr 2+ / Y 3+ is 0.8-3.0, and / or (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) is 0.8 or less, and / or (Rn + +Ca 2+ ) / Mg 2+ is less than 0.

8.

11. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: (Nb 5+ +W 6+ +Ti 4+ ) / (La 3+ +Gd 3+ +Y 3+ ) is between 0.7 and 2.0, and / or Y 3+ / (La 3+ +Gd 3+ +Y 3+ ) is 0.65 to 1.0, and / or Mg 2+ / Ba 2+ is 0.05 to 0.15, and / or Sr 2+ / Y 3+ is 1.0-2.0, and / or (Ca 2+ +Zn 2+ ) / (Nb 5+ +W 6+ +Ti 4+ ) is 0.5 or less, and / or (Rn + +Ca 2+ ) / Mg 2+ is less than or equal to 0.

5.

12. The optical glass according to any one of claims 1 to 3, comprising the following components in mol %: P 5+ : 30-40%, and / or La 3+ +Gd 3+ +Y 3+ : 0.1 to 15%, and / or Nb 5+ +W 6+ +Ti 4+ : 0.5 to 10%, and / or R 2+ : 35-55% and / or Al 3+ : 8-20%, and / or Rn + : 0 to 5%, and / or Yb 3+ : 0-5% and / or Zn 2+ : 0-5%, and / or B 3+ : 0 to 5% and / or Si 4+ : 0 to 2%, and / or Ta 5+ : 0-5% and / or Sb 3+ : 0 to 0.5% and / or Sn 4+ : 0 to 0.5% and / or Ce 4+ : 0 to 0.5%.

13. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: 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 to 2%, and / or Yb 3+ : 0-2% and / or Zn 2+ : 0-2%, and / or B 3+ : 0 to 2% and / or Si 4+ : 0 to 1%, and / or Ta 5+ : 0-2% and / or Sb 3+ : 0 to 0.1% and / or Sn 4+ : 0 to 0.1% and / or Ce 4+ : 0 to 0.1%.

14. The optical glass according to any one of claims 1 to 3, comprising the following components in mol %: La 3+ +Gd 3+ +Y 3+ : 1 to 10%, and / or Rn + and / or Yb 3+ and / or Zn 2+ does not contain and / or B 3+ Does not contain and / or Si 4+ and / or Ta 5+ Does not contain and / or Sn 4+ Does not contain and / or Ce 4+ Does not include.

15. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: Ba 2+ : 28-45% and / or Sr 2+ : More than 0 to 10%, and / or Mg 2+ : More than 0 to 10%, and / or Ca 2+ : 0 to 10%, and / or La 3+ : 0-10%, and / or Gd 3+ : 0-10%, and / or Y 3+ : 0 to 10% and / or Nb 5+ : 0 to 10%, and / or W 6+ : 0-10% and / or Ti 4+ : 0-10% and / or F - : 15-45% and / or O 2- : 55-85%.

16. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: Ba 2+ : 30-40% and / or Sr 2+ : 1-8% and / or Mg 2+ : 1-7% and / or Ca 2+ : 0 to 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 to 6%, and / or W 6+ : 0 to 6% and / or Ti 4+ : 0-5%, and / or F - : 18-38% and / or O 2- : 62-82%.

17. The optical glass according to any one of claims 1 to 3, comprising the following components in mole percent: Ba 2+ : 33-38% and / or Sr 2+ : 2-7% and / or Mg 2+ : 2-6% and / or Ca 2+ : 0 to 5%, and / or La 3+ : 0-3%, and / or Gd 3+ : 0-3%, and / or Y 3+ : 1-7% and / or Nb 5+ : 0 to 4%, and / or W 6+ : 0-5% and / or Ti 4+ : 0-2%, and / or F - : 21-35% and / or O 2- : 65-79%.

18. The components are expressed in mole percent, and the anions further include: Cl - : 0 to 1%, and / or Br - : 0-1%, and / or I - : 0 to 1%, the optical glass according to any one of claims 1 to 3.

19. The refractive index n of the optical glass d is 1.57 to 1.66, Abbe number ν d The optical glass according to any one of claims 1 to 3, wherein the refractive index is 56 to 65.

20. The refractive index n of the optical glass d is 1.60 to 1.63, Abbe number ν d The optical glass according to any one of claims 1 to 3, wherein the refractive index is 59 to 62.

21. ΔP of the optical glass C,s Value is less than or equal to 0 and / or ΔP C,t Value is less than -0.01 and / or water stability D W Class 3 or higher and / or acid resistance D A is 3 or higher, and / or weather resistance CR is 2 or higher, and / or transition temperature T g is 620°C or less, and / or density ρ is 4.60g / cm 3 Below, and / or λ 80 is 380 nm or less, and / or λ 5 The optical glass according to any one of claims 1 to 3, wherein the optical transmittance is 330 nm or less.

22. ΔP of the optical glass C,s Value is less than or equal to -0.02 and / or ΔP C,t Value is less than -0.05 and / or water stability D W Class 2 or higher and / or acid resistance D A is Class 2 or higher, and / or weather resistance CR is Class 1, and / or transition temperature T g is 600°C or less, and / or density ρ is 4.40 g / cm 3 Below, and / or λ 80 is 370 nm or less, and / or λ 5 The optical glass according to any one of claims 1 to 3, wherein the optical transmittance is 320 nm or less.

23. A glass preform made of the optical glass according to any one of claims 1 to 22.

24. An optical element produced from the optical glass according to any one of claims 1 to 22, or the glass preform according to claim 23.

25. An optical instrument comprising the optical glass according to any one of claims 1 to 22 and / or the optical element according to claim 24.

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