Near-infrared light absorbing glass, element and light filter

Abstract

The invention provides near-infrared light absorbing glass which is excellent in visible light region transmittance and excellent in near-infrared region absorption performance. The near-infrared light absorbing glass comprises the following cation components in percentage by mole: 46-64% of P < 5 + >; 0.5 to 10 percent of Al < 3 + >; 8-27% of Na < + >; r2 < + >: 0.1%-15%; zn < 2 + >: 2-15%; r < 2 + > is one or more of Mg < 2 + >, Ca < 2 + >, Sr < 2 + > and Ba < 2 + >; the anion component contains 88 to 100 percent of O2 <->; and F: 0-12%. Through reasonable component design, the obtained near-infrared light absorbing glass has an excellent transmission characteristic in a visible light region and has an excellent absorption characteristic in a near-infrared region.

Description

Technical Field

[0001] The present invention relates to a kind of glass, in particular to a kind of near-infrared light-absorbing glass, and a near-infrared light-absorbing glass element and a filter made therefrom. Background Art

[0002] In recent years, the spectral sensitivity of semiconductor imaging elements such as CCD and CMOS used in digital cameras, camera phones and VTR cameras has spread from the visible range to the near-infrared range. By using a filter that absorbs light in the near-infrared range, an image similar to the human visual perception can be obtained. The visible light wavelengths that can be perceived by the eyes of ordinary people are between 400 and 700 nm. Therefore, by using a filter that absorbs near-infrared light, an image with a brightness factor similar to that of the human eye can be obtained. With the growing demand for color sensitivity correction filters, higher requirements are correspondingly put forward for the near-infrared light-absorbing glass used to manufacture such filters, requiring such glass to have excellent transmission characteristics in the visible light region and excellent absorption characteristics in the near-infrared region. Chinese Patent CN110612276A discloses a near-infrared light-absorbing glass, the composition of which contains 14.5-90% of F - , in the case of a large amount of fluorine, fluorine is likely to volatilize during the glass melting process, which will cause environmental pollution, and the striation degree of the glass is not easy to control; on the other hand, the near-infrared light-absorbing glass disclosed in this patent has a low transmittance in the visible light region and is difficult to meet the use requirements of high-performance devices. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a near-infrared light-absorbing glass with excellent transmittance in the visible light region and excellent absorption performance in the near-infrared region.

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

[0005] For the near-infrared light-absorbing glass, in terms of mole percentage, the cation component contains: P 5+ : 46-64%; Al 3+ : 0.5-10%; Na + : 8-27%; R 2+ : 0.1-15%; Zn 2+ : 2-15%; Cu 2+ : 1-15%, where the R 2+ is one or more of Mg 2+ 、Ca 2+ 、Sr 2 + 、Ba 2+ ;

[0006] The anion component contains: O 2- : 88-100%; F- : 0 to 12%.

[0007] Furthermore, in the near-infrared light absorbing glass, in terms of mole percentage, the cation component further contains: Li + : 0 to 4.5%; and / or K + : 0 to 8%; and / or Ln 3+ : 0 to 5%; and / or Si 4+ : 0 to 4%; and / or B 3+ : 0 to 4%; and / or Zr 4+ : 0 to 4%; and / or Sb 3+ : 0 to 1%; and / or Sn 4+ : 0 to 1%; and / or Ce 4+ : 0 to 1%, where the Ln 3+ is La 3+ 、Gd 3+ 、Y 3+ 、Yb 3+ and one or more of the following;

[0008] The anion component further contains: Cl - +Br - +I - : 0 to 2%.

[0009] In the near-infrared light absorbing glass, in terms of mole percentage, the cation component consists of P 5+ : 46 to 64%; Al 3+ : 0.5 to 10%; Na + : 8 to 27%; R 2+ : 0.1 to 15%; Zn 2+ : 2 to 15%; Cu 2+ : 1 to 15%; Li + : 0 to 4.5%; K + : 0 to 8%; Ln 3+ : 0 to 5%; Si 4+ : 0 to 4%; B 3+ : 0 to 4%; Zr 4+ : 0 to 4%; Sb 3+ : 0 to 1%; Sn 4+ : 0 to 1%; Ce 4+ : 0 to 1% and is composed of, where the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ and one or more of the following, Ln 3+ is La 3+ 、Gd 3+ 、Y 3+ 、Yb3+ one or more of;

[0010] The anionic component consists of O 2- : 88 to 100%; F - : 0 to 12%; Cl - + Br - + I - : composed of 0 to 2%.

[0011] Furthermore, for the near-infrared light-absorbing glass described above, its components are expressed in mole percentages, where: (Zn 2+ + Na + ) / Al 3+ is 2.0 to 35.0, preferably (Zn 2+ + Na + ) / Al 3+ is 3.5 to 25.0, more preferably (Zn 2+ + Na + ) / Al 3+ is 4.5 to 15.0, further preferably (Zn 2+ + Na + ) / Al 3+ is 5.0 to 9.0.

[0012] Furthermore, for the near-infrared light-absorbing glass described above, its components are expressed in mole percentages, where: P 5+ / R 2+ is more than 4.5, preferably P 5+ / R 2+ is more than 6.5, more preferably P 5+ / R 2+ is 8.0 to 50.0, further preferably P 5+ / R 2+ is 9.0 to 20.0, and the R 2+ is one or more of Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ 。

[0013] Furthermore, for the near-infrared light-absorbing glass described above, its components are expressed in mole percentages, where: Ba 2+ / Cu 2+ is 1.5 or less, preferably Ba 2+ / Cu 2+ is 1.0 or less, more preferably Ba 2+ / Cu 2+ is 0.8 or less, further preferably Ba 2+ / Cu 2+ is 0.02 to 0.5.

[0014] Furthermore, for the near-infrared light-absorbing glass, its components are expressed in mole percentages, where: (Cu 2+ +Li + ) / Zn 2+ is 0.1 to 5.0, preferably (Cu 2+ +Li + ) / Zn 2+ is 0.2 to 2.5, more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.3 to 1.5, further preferably (Cu 2+ +Li + ) / Zn 2+ is 0.4 to 1.0.

[0015] Furthermore, for the near-infrared light-absorbing glass, its components are expressed in mole percentages, where: R 2+ / Zn 2+ is 0.05 to 5.0, preferably R 2+ / Zn 2+ is 0.1 to 3.0, more preferably R 2+ / Zn 2+ is 0.1 to 1.5, further preferably R 2+ / Zn 2+ is 0.2 to 1.0, and the R 2+ is one or more of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ .

[0016] Furthermore, for the near-infrared light-absorbing glass, its components are expressed in mole percentages, where: Mg 2+ / Al 3+ is 0.01 to 5.0, preferably Mg 2+ / Al 3+ is 0.05 to 3.0, more preferably Mg 2+ / Al 3+ is 0.1 to 1.0, further preferably Mg 2+ / Al 3 + is 0.1 to 0.8.

[0017] Furthermore, for the near-infrared light-absorbing glass, its components are expressed in mole percentages, where: F - / Zn 2+ is below 3.0, preferably F - / Zn 2+ is 0.05 to 2.0, more preferably F - / Zn2+ is from 0.1 to 1.0, and more preferably F - / Zn 2+ is from 0.1 to 0.7.

[0018] Furthermore, for the near-infrared light absorbing glass, its components are expressed in mole percentages, where: (F - +Ba 2+ ) / Al 3+ is 8.0 or less, preferably (F - +Ba 2+ ) / Al 3+ is 5.0 or less, more preferably (F - +Ba 2+ ) / Al 3+ is from 0.1 to 2.0, and more preferably (F - +Ba 2+ ) / Al 3+ is from 0.5 to 1.5.

[0019] Furthermore, for the near-infrared light absorbing glass, its components are expressed in mole percentages, where: P 5+ / (F - +Zn 2+ ) is from 2.0 to 15.0, preferably P 5+ / (F - +Zn 2+ ) is from 2.5 to 10.0, more preferably P 5+ / (F - +Zn 2+ ) is from 3.0 to 8.5, and more preferably P 5+ / (F - +Zn 2+ ) is from 3.5 to 6.5.

[0020] Furthermore, for the near-infrared light absorbing glass, its components are expressed in mole percentages, where: P 5+ : 51 - 61%, preferably P 5+ : 53 - 59%; and / or Al 3+ : 1 - 8%, preferably Al 3+ : 2 - 6%; and / or Na + : 11 - 25%, preferably Na + : 16 - 22%; and / or R 2+ : 0.5 - 10%, preferably R 2+ : 1 - 8%; and / or Zn 2+ : 4 - 12%, preferably Zn 2+ : 6 - 10%; and / or Cu 2+ : 2 - 12%, preferably Cu 2+: 5 - 10%; and / or Li + : 0 - 3%, preferably Li + : 0 - 1%; and / or K + : 0 - 4%, preferably K + : 0 - 2%; and / or Ln 3+ : 0 - 2%, preferably Ln 3+ : 0 - 1%; and / or Si 4+ : 0 - 2%, preferably Si 4+ : 0 - 1%; and / or B 3+ : 0 - 2%, preferably B 3+ : 0 - 1%; and / or Zr 4+ : 0 - 2%, preferably Zr 4+ : 0 - 1%; 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%; and / or Ce 4+ : 0 - 0.5%, preferably Ce 4+ : 0 - 0.1%, the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ one or more of, Ln 3+ is La 3+ 、Gd 3+ 、Y 3+ 、Yb 3+ one or more of.

[0021] Further, for the near-infrared light-absorbing glass described above, its components are expressed in mole percentages, where: O 2- : 92 - 99.5%, preferably O 2- : 94 - 99%; and / or F - : 0.5 - 8%, preferably F - : 1 - 6%; and / or Cl - + Br - + I - : 0 - 1%, preferably Cl - + Br - + I - : 0 - 0.5%.

[0022] Further, for the near-infrared light-absorbing glass described above, its components are expressed in mole percentages, where: Mg 2+ : 0 - 8%, preferably Mg 2+ : 0.5 - 6%, more preferably Mg 2+: 1 - 4%; and / or Ca 2+ : 0 - 8%, preferably Ca 2+ : 0 - 5%, more preferably Ca 2+ : 0 - 3%; and / or Sr 2+ : 0 - 8%, preferably Sr 2+ : greater than 0 but less than or equal to 5%, more preferably Sr 2+ : 0.5 - 3%; and / or Ba 2+ : 0 - 8%, preferably Ba 2+ : greater than 0 but less than or equal to 5%, more preferably Ba 2+ : 0.5 - 3%.

[0023] Furthermore, the near-infrared light-absorbing glass does not contain Li in its components + ; and / or does not contain K + ; and / or does not contain Ln 3+ ; and / or does not contain Si 4+ ; and / or does not contain B 3+ ; and / or does not contain Zr 4+ ; and / or does not contain Cl - ; and / or does not contain Br - ; and / or does not contain I - ; and / or does not contain S 6+ ; and / or does not contain V 5+ , the Ln 3+ is La 3+ , Gd 3+ , Y 3+ , Yb 3+ one or more of them.

[0024] Furthermore, the transition temperature of the near-infrared light-absorbing glass is below 400 °C, preferably below 390 °C, more preferably below 385 °C, and further preferably 350 - 380 °C; and / or the density is 3.40 g / cm 3 or less, preferably 3.30 g / cm 3 or less, more preferably 3.10 g / cm 3 or less, and further preferably 3.05 g / cm 3 or less; and / or the coefficient of thermal expansion is 130×10 -7 / K or less, preferably 125×10 -7 / K or less, more preferably 100×10 -7 / K - 120×10 -7 / K, and further preferably 110.5×10 -7 / K - 118×10 -7 / K; and / or the Young's modulus is 4800×10 7 / Pa or more, preferably 5000×10 7 / Pa or more, more preferably 5200×10 7 / Pa or more, still more preferably 5400×10 7 / Pa to 6000×10 7 / Pa; and / or the bubble degree is above grade A, preferably above grade A0, more preferably grade A 00 ; and / or the stripe degree is above grade C, preferably above grade B; and / or the viscosity at 1000 °C is 20.0 poise or less, preferably 10.0 poise or less, more preferably 5.0 poise or less.

[0025] Furthermore, for the near-infrared light absorbing glass, in the spectral transmittance within the wavelength range of 500 - 700 nm for the near-infrared light absorbing glass with a thickness of 0.1 - 0.4 mm, the wavelength λ corresponding to a transmittance of 50% 50 is 621 - 640 nm, preferably 624 - 638 nm, more preferably 626 - 634 nm.

[0026] Furthermore, for the near-infrared light absorbing glass, in the spectral transmittance at a wavelength of 400 nm for the near-infrared light absorbing glass with a thickness of 0.1 - 0.4 mm, the transmittance τ 400 is 83.0% or more, preferably 84.0% or more, more preferably 85.0% or more; and / or the spectral transmittance τ at a wavelength of 450 nm 450 is 86.0% or more, preferably 87.0% or more, more preferably 88.0% or more; and / or the spectral transmittance τ at a wavelength of 500 nm 500 is 87.0% or more, preferably 88.0% or more, more preferably 89.0% or more; and / or the spectral transmittance τ at a wavelength of 1100 nm 1100 is 10.0% or less, preferably 8.0% or less, more preferably 6.0% or less.

[0027] Furthermore, the thickness of the near-infrared light absorbing glass is 0.15 - 0.35 mm, preferably 0.2 - 0.3 mm, more preferably 0.1 mm or 0.15 mm or 0.2 mm or 0.21 mm or 0.25 mm.

[0028] A near-infrared light absorbing glass element contains the above-mentioned near-infrared light absorbing glass.

[0029] A filter contains the above-mentioned near-infrared light absorbing glass, or contains the above-mentioned near-infrared light absorbing glass element.

[0030] A device contains the above-mentioned near-infrared light absorbing glass, or contains the above-mentioned near-infrared light absorbing glass element, or contains the above-mentioned filter.

[0031] The beneficial effects of the present invention are as follows: Through reasonable component design, the near-infrared light-absorbing glass obtained in the present invention has excellent transmittance characteristics in the visible light region and excellent absorption characteristics in the near-infrared region. Detailed Embodiments

[0032] Hereinafter, the embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments, and appropriate modifications can be made within the scope of the object of the present invention for implementation. In addition, regarding the repeated description part, although there are cases where appropriate omissions are made, the gist of the invention will not be limited thereby. The near-infrared light-absorbing glass of the present invention is sometimes simply referred to as glass.

[0033] [Near-infrared Light-absorbing Glass]

[0034] Hereinafter, the ranges of each component (constituent) constituting the near-infrared light-absorbing glass of the present invention will be described. In this specification, unless otherwise specified, the content of the cation component is expressed as the mole percentage (mol%) of the cation component in all cation components, and the content of the anion component is expressed as the mole percentage (mol%) of the anion component in all anion components; the ratio between the contents of the cation components is the ratio of the mole percentage contents between the contents of the respective cation components; the ratio between the contents of the anion components is the ratio of the mole percentage contents between the contents of the respective anion components; the ratio between the contents of the cation and anion components is the ratio between the mole percentage content of the cation component in all cation components and the mole percentage content of the anion component in all anion components.

[0035] Unless otherwise indicated in specific cases, the numerical ranges listed herein include the upper and lower limit values, "above" and "below" include the endpoint values, and include all integers and fractions within the range, and are not limited to the specific values listed when defining the range. As used herein, "and / or" is inclusive. For example, "A and / or B" means only A, or only B, or both A and B simultaneously.

[0036] It should be noted that the ionic valences of the following-described components are representative values used for convenience and are not different from other ionic valences. There is a possibility that the ionic valences of the components in the glass are other than the representative values. For example, P usually exists in the glass in a state with an ionic valence of +5. Therefore, in this patent, "P 5+ " is used as the representative value, but there is a possibility that it exists in other ionic valence states, which is also within the protection scope of this patent.

[0037] <Cation Component>

[0038] P 5+ is an essential component for forming the glass skeleton of the present invention, which can promote the formation of the glass and is beneficial to improving the near-infrared absorption performance of the glass. If P5+ If the content is less than 46%, the above effects are insufficient, and it is difficult for the near-infrared absorption function of the glass to meet the design requirements; if P 5+ If the content exceeds 64%, the devitrification tendency of the glass increases, and at the same time, the abrasion degree of the glass becomes worse and the grinding processability becomes worse. Therefore, in the present invention, the content of P 5+ is 46-64%, preferably 51-61%, and more preferably 53-59%.

[0039] Al 3+ is beneficial to improving the strength of the glass and improving the chemical stability of the glass. However, if its content is too high, the melting performance of the glass becomes worse and the near-infrared light absorption characteristics become worse. Therefore, in the present invention, the content of Al 3+ is 0.5-10%, preferably 1-8%, and more preferably 2-6%.

[0040] Li + can improve the meltability of the glass, but in the present invention, if the content of Li + is too high, the near-infrared absorption characteristics of the glass are reduced, and the devitrification resistance and stability become worse. Therefore, in the present invention, the content of Li + is 0-4.5%, preferably 0-3%, and more preferably 0-1%. In some embodiments, it is further preferably that Li + is not contained.

[0041] Na + can improve the visible light transmittance of the glass, optimize the near-infrared light absorption performance and striation degree of the glass. However, if its content is too high, the thermal expansion coefficient of the glass becomes worse. Therefore, in the present invention, the content of Na + is 8-27%, preferably 11-25%, and more preferably 16-22%.

[0042] K + can reduce the melting temperature of the glass. However, if its content exceeds 8%, the chemical stability of the glass is reduced, the abrasion degree of the glass becomes worse, and the grinding processability becomes worse. Therefore, in the present invention, the content of K + is 0-8%, preferably the content of K + is 0-4%, and more preferably the content of K + is 0-2%. In some embodiments, it is further preferably that K + is not contained.

[0043] R 2+ (R 2+ is one or more of Mg 2+ Ca 2+ Sr 2+ Ba 2+ can improve the meltability of the glass and improve the strength of the glass. However, if R 2+When the content of [substance] exceeds 15%, the devitrification resistance of the glass decreases. Therefore, in the present invention, the content of R 2+ is 0.1 to 15%, preferably 0.5 to 10%, more preferably 1 to 8%.

[0044] In some embodiments, the ratio between the content of P 5+ and the content of R 2+ is controlled to be above 4.5, which can improve the Young's modulus and striation degree of the glass and prevent the increase of the glass transition temperature. Therefore, it is preferred that P 5+ / R 2+ is above 4.5, more preferably P 5+ / R 2+ is above 6.5, further preferably P 5+ / R 2+ is 8.0 to 50.0, and even more preferably P 5+ / R 2+ is 9.0 to 20.0. 5+ / R 2+ is 9.0 to 20.0.

[0045] Mg 2+ can improve the chemical stability of the glass. If its content exceeds 8%, the visible light transmittance of the glass tends to decrease, and the high-temperature viscosity of the glass increases. Therefore, the content of Mg 2+ is 0 to 8%, preferably the content of Mg 2+ is 0.5 to 6%, more preferably the content of Mg 2+ is 1 to 4%.

[0046] In some embodiments, the ratio between the content of Mg 2+ and the content of Al 3+ is controlled within the range of 0.01 to 5.0, which can improve the striation degree of the glass and optimize the thermal expansion coefficient of the glass. Therefore, it is preferred that Mg 2+ / Al 3+ is 0.01 to 5.0, more preferably Mg 2+ / Al 3+ is 0.05 to 3.0, further preferably Mg 2+ / Al 3+ is 0.1 to 1.0, and even more preferably Mg 2+ / Al 3+ is 0.1 to 0.8. 2+ / Al 3 + is 0.1 to 0.8.

[0047] Ca 2+ can reduce the melting temperature of the glass and the liquidus temperature of the glass, but if its content is too high, the devitrification resistance of the glass will decrease. Therefore, Ca 2+The content is 0 to 8%, preferably 0 to 5%, more preferably 0 to 3%.

[0048] Sr 2+ It can improve the weather resistance of the glass, but if its content is too high, the near-infrared absorption characteristics of the glass will decrease and the thermal expansion coefficient will increase. Therefore, Sr 2+ The content is 0 to 8%, preferably greater than 0 but less than or equal to 5%, more preferably 0.5 to 3%.

[0049] Ba 2+ It can reduce the high-temperature viscosity of the glass and improve the transmittance of the glass in the visible light region. However, if its content is too high, the weather resistance of the glass will deteriorate and the devitrification resistance will decrease. Therefore, Ba 2+ The content is 0 to 8%, preferably greater than 0 but less than or equal to 5%, more preferably 0.5 to 3%.

[0050] Zn 2+ It can reduce the high-temperature viscosity of the glass and improve the abrasion degree of the glass. However, if its content exceeds 15%, the near-infrared light absorption characteristics and the thermal expansion coefficient of the glass will deteriorate. Therefore, Zn 2+ The content is 2 to 15%, preferably 4 to 12%, more preferably 6 to 10%.

[0051] In some embodiments, by controlling the total content of Zn 2+ and Na + The ratio (Zn 2+ +Na + to the content of Al 3+ (Zn 2+ +Na + ) / Al 3+ is in the range of 2.0 to 35.0, the bubble degree of the glass can be improved and the striation degree of the glass can be prevented from deteriorating. Therefore, preferably (Zn 2+ +Na + ) / Al 3+ is 2.0 to 35.0, more preferably (Zn 2+ +Na + ) / Al 3+ is 3.5 to 25.0, further preferably (Zn 2 + +Na + ) / Al 3+ is 4.5 to 15.0, and even more preferably (Zn 2+ +Na + ) / Al 3+ is 5.0 to 9.0.

[0052] In some embodiments, the content of R 2+ and Zn 2+The ratio R between the contents 2+ / Zn 2+ is controlled within the range of 0.05 to 5.0, which can improve the bubble degree of the glass and reduce the density of the glass. Therefore, preferably, R 2+ / Zn 2+ is 0.05 to 5.0, and more preferably, R 2+ / Zn 2+ is 0.1 to 3.0. Further preferably, R 2+ / Zn 2+ is 0.1 to 1.5. Even more preferably, R 2+ / Zn 2+ is 0.2 to 1.0.

[0053] Cu 2+ is an essential component for the glass of the present invention to obtain near-infrared light absorption performance. If its content is less than 1%, it is difficult for the near-infrared absorption performance of the glass to meet the design requirements. However, if the content of Cu 2+ exceeds 15%, the transmittance of the glass in the visible light region decreases, the melting temperature of the glass increases, and the stability decreases. Therefore, in the present invention, the content of Cu 2+ is 1 to 15%, preferably 2 to 12%, and more preferably 5 to 10%.

[0054] In some embodiments, the ratio Ba 2+ between the content of Ba and the content of Cu 2+ is controlled below 1.5, which can make it easier for the glass to obtain the spectral characteristics desired by the present invention while reducing the thermal expansion coefficient and density of the glass. Therefore, preferably, Ba 2+ / Cu 2+ is below 1.5, and more preferably, Ba 2+ / Cu 2+ is below 1.0. Further preferably, Ba 2+ / Cu 2+ is below 0.8. Even more preferably, Ba 2+ / Cu 2+ is 0.02 to 0.5.

[0055] In some embodiments, the ratio (Cu 2+ + +Li 2+ + +Li 2+ between the total content of Cu and Li and the content of Zn 2 + + 2+ +Li 2+ ) / Zn + ​​​​The control is in the range of 0.1 to 5.0. While reducing the high-temperature viscosity of the glass, it can improve the striation degree of the glass. Therefore, (Cu 2+ +Li + ) / Zn 2+ is preferably 0.1 to 5.0, more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.2 to 2.5, and further preferably (Cu 2 + +Li + ) / Zn 2+ is 0.3 to 1.5, and even more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.4 to 1.0.

[0056] Ln 3+ (Ln 3+ is one or more of La 3+ , Gd 3+ , Y 3+ , Yb 3+ ) is beneficial to improving the chemical stability and hardness of the glass. However, if its content exceeds 5%, the devitrification resistance of the glass becomes poor. Therefore, in the present invention, the content of Ln 3+ is 0 to 5%, preferably 0 to 2%, and more preferably 0 to 1%. In some embodiments, it is further preferably that Ln 3+ is not contained.

[0057] Si 4+ can promote the formation of the glass and improve the chemical stability of the glass. If its content exceeds 4%, the meltability of the glass becomes poor, and it is easy to form unmelted impurity substances in the glass. At the same time, the near-infrared light absorption characteristics of the glass decrease. Therefore, the content of Si 4+ is 0 to 4%, preferably 0 to 2%, and more preferably 0 to 1%. In some embodiments, it is further preferably that Si 4+ is not contained.

[0058] B 3+ can reduce the glass melting temperature. When its content exceeds 4%, the near-infrared light absorption characteristics decrease. Therefore, the content of B 3 + is 0 to 4%, preferably 0 to 2%, and more preferably 0 to 1%. In some embodiments, it is further preferably that B 3+ is not contained.

[0059] Zr 4+ can improve the chemical stability of the glass. However, if its content exceeds 4%, the melting performance of the glass significantly decreases, and the anti-crystallization performance of the glass decreases. Therefore, Zr 4+The content is 0 to 4%, preferably 0 to 2%, and more preferably 0 to 1%. In some embodiments, it is further preferred that Zr is not contained. 4+ .

[0060] Sb 3+ Sn 4+ 、Ce 4+ One or more components in the glass can be used as a clarifier to improve the clarification effect of the glass and increase the bubble degree of the glass. 3+ Sn 4+ 、Ce 4+ The content of each is 0 to 1%, preferably 0 to 0.5%, and more preferably 0 to 0.1%.

[0061] <Anion component>

[0062] O 2- It is an important anion component in the glass of the present invention, which can stabilize the glass network structure, form a stable glass, and also ensure that the Cu ions in the glass are Cu 2+ The glass of the present invention has the property of absorbing light in the near-infrared region. 2- If the content of Cu is too small, it is difficult to form stable glass, and Cu 2+ Easily reduced to Cu + , it is difficult to achieve the effect of absorbing light in the near-infrared region; but O 2- When the content of O is too high, the melting temperature of the glass will be high, resulting in a decrease in the spectral transmittance in the visible light domain. 2- The content is 88 to 100%, preferably 92 to 99.5%, and more preferably 94 to 99%.

[0063] F - It can reduce the melting temperature of glass and the high temperature viscosity of glass. The appropriate amount of it is beneficial to improve the anti-crystallization performance of glass. - When the content exceeds 12%, the transmittance of the glass in the visible light region decreases, the near-infrared light absorption characteristics decrease, and the stability of the glass decreases. - It is volatile, causing environmental pollution, and the glass is prone to streaking, resulting in poor streak quality. - The content of is 0 to 12%, preferably 0.5 to 8%, and more preferably 1 to 6%.

[0064] In some embodiments, F - The content of Zn 2+ The ratio between the contents of - / Zn 2+ Controlling F below 3.0 can reduce the transition temperature of the glass while optimizing the high temperature viscosity of the glass.- / Zn 2+ is below 3.0, more preferably F - / Zn 2+ is 0.05 - 2.0, further preferably F - / Zn 2+ is 0.1 - 1.0, even more preferably F - / Zn 2+ is 0.1 - 0.7.

[0065] In some embodiments, the total content of F - and Ba 2+ F - +Ba 2+ and the content of Al 3+ The ratio between (F - +Ba 2+ ) / Al 3+ is controlled below 8.0, which can improve the Young's modulus of the glass while preventing the thermal expansion coefficient of the glass from deteriorating. Therefore, preferably (F - +Ba 2+ ) / Al 3+ is below 8.0, more preferably (F - +Ba 2+ ) / Al 3+ is below 5.0, further preferably (F - +Ba 2 + ) / Al 3+ is 0.1 - 2.0, even more preferably (F - +Ba 2+ ) / Al 3+ is 0.5 - 1.5.

[0066] In some embodiments, by controlling the ratio of the content of P 5+ to the total content of F - and Zn 2+ F - +Zn 2+ P 5+ / (F - +Zn 2+ ) within the range of 2.0 - 15.0, the visible light transmittance and near-infrared light absorption characteristics of the glass can be improved, and the bubble degree of the glass can be increased. Therefore, preferably P 5+ / (F - +Zn 2+ ) is 2.0 - 15.0, more preferably P 5+ / (F - +Zn 2+ ) is 2.5 - 10.0, further preferably P 5+ / (F- + Zn 2+ ) is 3.0 to 8.5, and more preferably P 5+ / (F - + Zn 2+ ) is 3.5 to 6.5.

[0067] Cl - , Br - , I - One or more of the components can be used as a fining agent to improve the fining effect of the glass and increase the bubble degree of the glass. In the present invention, Cl - , Br - , I - The total content is 0 to 2%, preferably 0 to 1%, and more preferably 0 to 0.5%. In some embodiments, it is further preferred not to contain Cl - , and / or not to contain Br - , and / or not to contain I - .

[0068] <Components not contained>

[0069] Cation components of elements such as Cr, Mn, Fe, Co, Ni, Ag, and Mo, even when contained in small amounts alone or in combination, will interfere with the spectral transmittance of the glass and are not conducive to forming the near-infrared light-absorbing glass of the present invention. Therefore, it is preferred not to contain the above components.

[0070] Cation components of elements such as As, Pb, Th, Cd, Tl, Os, Be, and Se have a tendency to be controlled in use as harmful chemical substances in recent years. Measures for environmental protection are necessary not only in the glass manufacturing process but also in the processing process and the disposal after productization. Therefore, in the case of paying attention to the impact on the environment, except for inevitable mixing, it is preferably not actually contained. Thus, the glass becomes practically free of substances that pollute the environment. Therefore, even without taking special environmental countermeasures, the glass of the present invention can be manufactured, processed, and discarded.

[0071] In some embodiments, to obtain the near-infrared light-absorbing glass with excellent properties of the present invention, it is preferred not to contain S 6+ . In some embodiments, to prevent the transmittance in the visible light region from deteriorating, it is preferred not to contain V 5+ .

[0072] "Not containing" and "0%" as described in this document mean that the component is not intentionally added as a raw material to the near-infrared light-absorbing glass of the present invention; however, as raw materials and / or equipment for producing glass, there may be certain impurities or components that are not intentionally added and are contained in trace amounts or in small amounts in the final near-infrared light-absorbing glass. Such a situation is also within the scope of protection of this invention patent.

[0073] [Manufacturing Method]

[0074] The manufacturing method of the near-infrared light-absorbing glass of the present invention is as follows: The glass of the present invention is produced using conventional raw materials and conventional processes. Carbonates, nitrates, phosphates, metaphosphates, sulfates, hydroxides, oxides, fluorides, etc. are used as raw materials. After proportioning according to the conventional method, the prepared furnace charge is put into a melting furnace (such as a platinum crucible, a quartz crucible, etc.) at 700-1000°C for melting. And after clarification, stirring and homogenization, a homogeneous molten glass is obtained. This molten glass is formed in a mold and annealed. Those skilled in the art can reasonably and appropriately select raw materials, process methods and process parameters according to actual needs.

[0075] The near-infrared light-absorbing glass of the present invention can also be formed by well-known methods. In some embodiments, the near-infrared light-absorbing glass described herein can be made into a shaped body by various processes, and the shaped body includes but is not limited to sheets. The processes include but are not limited to slot drawing, float process, roll pressing and other processes for forming sheets known in the art. Alternatively, the glass can be formed by the float process or roll pressing method well-known in the art. The glass of the present invention can have any reasonable and useful shape or structure such as 2D, 2.5D or 3D, etc.

[0076] The near-infrared light-absorbing glass of the present invention can be used to manufacture a glass shaped body of a sheet by methods such as grinding or polishing, but the methods for manufacturing the glass shaped body are not limited to these methods.

[0077] The near-infrared light-absorbing glass described in the present invention can have any reasonable and useful thickness.

[0078] Next, the performance of the near-infrared light-absorbing glass of the present invention will be described.

[0079] <Transition Temperature>

[0080] The transition temperature (T g ) of the glass is tested according to the method specified in "GB / T7962.16-2010".

[0081] In some embodiments, the transition temperature (T g ) of the near-infrared light-absorbing glass of the present invention is 400°C or lower, preferably 390°C or lower, more preferably 385°C or lower, and further preferably 350-380°C.

[0082] <Density>

[0083] The density (ρ) of the glass is tested by the method specified in "GB / T7962.20 - 2010".

[0084] In some embodiments, the density (ρ) of the near - infrared light - absorbing glass of the present invention is 3.40 g / cm 3 Preferably, it is 3.30 g / cm or less hereinafter. 3 More preferably, it is 3.10 g / cm or less hereinafter. 3 Even more preferably, it is 3.05 g / cm or less hereinafter. 3 Hereinafter.

[0085] <Coefficient of thermal expansion>

[0086] The coefficient of thermal expansion (α 20-120 ℃) of the glass is tested by the method specified in "GB / T7962.16 - 2010".

[0087] In some embodiments, the coefficient of thermal expansion (α 20-120℃ ) of the near - infrared light - absorbing glass of the present invention is 130×10 -7 / K or less, preferably 125×10 -7 / K or less, more preferably 100×10 -7 / K to 120×10 -7 / K, even more preferably 110.5×10 -7 / K to 118×10 -7 / K.

[0088] <Young's modulus>

[0089] The Young's modulus (E) of the glass is obtained by measuring the longitudinal wave velocity and the transverse wave velocity using ultrasonic waves and then calculating according to the following formula.

[0090]

[0091] Wherein, in the formula:

[0092] E is the Young's modulus, Pa;

[0093] G is the shear modulus, Pa;

[0094] V T is the transverse wave velocity, m / s;

[0095] V S is the longitudinal wave velocity, m / s;

[0096] ρ is the glass density, g / cm 3 .

[0097] In some embodiments, the Young's modulus (E) of the near-infrared light absorbing glass of the present invention is 4800×10 7 / Pa or more, preferably 5000×10 7 / Pa or more, more preferably 5200×10 7 / Pa or more, still more preferably 5400×10 7 / Pa to 6000×10 7 / Pa.

[0098] <Bubble degree>

[0099] The bubble degree of the glass is tested by the method specified in "GB / T7962.8-2010".

[0100] In some embodiments, the bubble degree of the near-infrared light absorbing glass of the present invention is above grade A, preferably above grade A0, more preferably grade A 00 grade.

[0101] <Striae degree>

[0102] The striae degree of the glass is inspected by comparing with a standard specimen in the direction where striae are most easily visible using a striae meter composed of a point light source and a lens, and is divided into 4 grades. See Table 1 below for details.

[0103] Table 1. Striae degree grade table

[0104] Level Degree of streaks A No visible streaks to the naked eye under specified detection conditions B There are fine and scattered streaks under specified detection conditions C There are slight parallel streaks under specified detection conditions D There are rough parallel streaks under specified detection conditions

[0105] In some embodiments, the striae degree of the near-infrared light absorbing glass of the present invention is above grade C, preferably above grade B.

[0106] <High-temperature viscosity>

[0107] The high-temperature viscosity of the glass is tested by the following method: The high-temperature viscosity of the glass is tested by the rotation method using a THETA Rheotronic II high-temperature viscometer, and the numerical unit is dPaS (poise). The smaller the value, the lower the viscosity.

[0108] In some embodiments, the viscosity of the near-infrared light absorbing glass of the present invention at 1000 °C is 20.0 poise or less, preferably 10.0 poise or less, more preferably 5.0 poise or less.

[0109] <Spectral transmittance>

[0110] The spectral transmittance of the glass of the present invention refers to the value obtained by the following test method using a spectrophotometer: Assuming that the glass sample has two planes that are parallel to each other and optically polished, light is incident perpendicularly from one parallel plane and exits from the other parallel plane. The intensity of the exiting light divided by the intensity of the incident light is the transmittance, and this transmittance is also called the external transmittance.

[0111] In some embodiments, when the thickness of the near-infrared light absorbing glass is 0.1 to 0.4 mm, the spectral transmittance has one or more of the following characteristics:

[0112] 1) The spectral transmittance (τ 400 ) at a wavelength of 400 nm is 83.0% or more, preferably 84.0% or more, and more preferably 85.0% or more.

[0113] 2) The spectral transmittance (τ 450 ) at a wavelength of 450 nm is 86.0% or more, preferably 87.0% or more, and more preferably 88.0% or more.

[0114] 3) The spectral transmittance (τ 500 ) at a wavelength of 500 nm is 87.0% or more, preferably 88.0% or more, and more preferably 89.0% or more.

[0115] 4) The spectral transmittance (τ 1100 ) at a wavelength of 1100 nm is 10.0% or less, preferably 8.0% or less, and more preferably 6.0% or less.

[0116] In some embodiments, when the thickness of the near-infrared light absorbing glass is 0.1 to 0.4 mm, in the spectral transmittance in the wavelength range of 500 to 700 nm, the wavelength (λ 50 ) corresponding to a transmittance of 50% is 621 to 640 nm, preferably 624 to 638 nm, and more preferably 626 to 634 nm.

[0117] In the above spectral transmittance test, the thickness of the near-infrared light absorbing glass is preferably 0.15 to 0.35 mm, more preferably 0.2 to 0.3 mm, and further preferably 0.1 mm or 0.15 mm or 0.2 mm or 0.21 mm or 0.25 mm.

[0118] [Near-infrared light absorbing glass element]

[0119] The near-infrared light absorbing glass element involved in the present invention contains the above-mentioned near-infrared light absorbing glass, and examples thereof include a thin plate-shaped glass element or a lens used in a near-infrared light absorbing filter, which is suitable for the color correction use of a solid-state imaging element and has various excellent properties of the above glass.

[0120] Moreover, the thickness of the near-infrared light-absorbing glass element (the distance between the incident surface and the exit surface of the transmitted light) is determined by the transmittance characteristics of the element, and is preferably 0.1 to 0.4 mm, more preferably 0.15 to 0.35 mm, still more preferably 0.2 to 0.3 mm, and even more preferably 0.1 mm or 0.15 mm or 0.2 mm or 0.21 mm or 0.25 mm. In the spectral transmittance within the wavelength range of 500 to 700 nm, the wavelength (λ 50 ) at which the transmittance reaches 50% is 621 to 640 nm, preferably 624 to 638 nm, and more preferably 626 to 634 nm. In order to obtain such a near-infrared light-absorbing glass element, the composition of the glass is adjusted within the scope described in the specification of the present invention, and the glass element having the above-described spectral characteristics and thickness is processed.

[0121] [Filter]

[0122] The filter according to the present invention is a near-infrared filter, which contains the above-described near-infrared light-absorbing glass or contains the above-described near-infrared light-absorbing glass element. Through this element, the color correction function of the filter is imparted, and at the same time, various excellent properties of the above glass are also possessed.

[0123] [Equipment]

[0124] The near-infrared light-absorbing glass, or near-infrared light-absorbing glass element, or filter of the present invention can be manufactured by well-known methods for devices such as portable communication devices (such as mobile phones, PADs, etc.), smart wearable devices (such as smart watches, etc.), photographic devices (such as single-lens reflex cameras, mirrorless cameras, etc.), imaging devices, vehicle-mounted devices, display devices, and monitoring devices.

[0125] Examples

[0126] <Examples of Near-Infrared Light-Absorbing Glass>

[0127] In order to further clearly explain and illustrate the technical solutions of the present invention, the following non-limiting examples are provided.

[0128] In this example, the glass having the compositions shown in Tables 2 to 4 was obtained by using the above-described manufacturing method of the near-infrared light-absorbing glass. In addition, the characteristics of each near-infrared light-absorbing glass were measured by the testing method described in the present invention, and the measurement results are shown in Tables 2 to 4.

[0129] Table 2.

[0130]

[0131]

[0132] Table 3.

[0133]

[0134]

[0135] Table 4.

[0136]

[0137]

[0138] The near-infrared light-absorbing glass prepared in the above-described Examples 2 to 4 was processed into glass sheets with a thickness of 0.21 mm, and the spectral transmittance of the near-infrared light-absorbing glass of each Example was measured according to the test method described in the specification of the present invention. The results are shown in Tables 5 to 7.

[0139] Table 5.

[0140] Example 1# 2# 3# 4# 5# 6# 7# 8# <![CDATA[τ 400 (%)]]> 84.2 84.5 85.0 85.6 85.2 85.0 85.4 85.3 <![CDATA[τ 450 (%)]]> 86.8 87.2 88.2 88.3 88.5 88.1 88.5 88.6 <![CDATA[τ 500 (%)]]> 87.4 88.0 89.1 89.4 89.7 88.9 89.8 89.9 <![CDATA[τ 1100 (%)]]> 6.5 6.4 5.8 5.6 5.3 6.0 5.4 5.2 <![CDATA[λ 50 (nm)]]> 626 633 628 630 632 631 627 630

[0141] Table 6.

[0142] Example 1# 2# 3# 4# 5# 6# 7# 8# <![CDATA[τ 400 (%)]]> 85.2 85.1 85.6 85.7 85.2 85.3 85.6 85.5 <![CDATA[τ 450 (%)]]> 88.8 88.4 88.6 88.4 88.5 88.4 88.8 88.3 <![CDATA[τ 500 (%)]]> 89.7 89.6 89.8 89.7 89.6 89.5 89.9 89.6 <![CDATA[τ 1100 (%)]]> 5.2 5.3 5.2 5.0 5.3 5.5 4.8 5.4 <![CDATA[λ 50 (nm)]]> 631 630 632 630 631 630 630 630

[0143] Table 7.

[0144]

[0145]

[0146] <Examples of Near-Infrared Light-Absorbing Glass Elements>

[0147] The near-infrared light-absorbing glass of Examples 1 to 24# of the present invention was made into near-infrared light-absorbing glass elements by a method well-known in the art. For example, a thin-plate-shaped near-infrared light-absorbing glass element or a lens used in a near-infrared light-absorbing filter can be cited, which is suitable for the color correction application of a solid-state imaging element and has various excellent properties of the above glass.

[0148] <Examples of Filters>

[0149] The near-infrared light-absorbing glass and / or near-infrared light-absorbing glass elements of Examples 1 to 24# of the present invention were made into filters by a method well-known in the art. The filter of the present invention has a color correction function and also has various excellent properties of the above glass.

[0150] <Examples of Equipment>

[0151] The near-infrared light-absorbing glass and / or near-infrared light-absorbing glass element and / or filter of the present invention can be fabricated by well-known methods for devices such as portable communication devices (such as mobile phones), smart wearable devices, photographic devices, imaging devices, display devices, and monitoring devices. It can also be used, for example, in imaging devices, sensors, microscopes, medical technology, digital projection, optical communication technology / information transmission, or for imaging devices and apparatuses in the automotive field.

Claims

1. Near-infrared light-absorbing glass, characterized in that, In mole percentage, the cation component contains: P 5+ : 46 - 64%; Al 3+ : 0.5 - 10%; Na + : 8 - 27%; R 2+ : 0.1 - 15%; Zn 2+ : 2 - 15%; Cu 2+ : 1 - 15%, where the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ or one or more of them; The anionic component contains: O 2- : 88 to 100%; F - : 0 to 12%.

2. The near-infrared light-absorbing glass according to claim 1, wherein In terms of mole percentage, the cation component further contains: Li + : 0 to 4.5%; and / or K + : 0 to 8%; and / or Ln 3+ : 0 to 5%; and / or Si 4+ : 0 to 4%; and / or B 3+ : 0 to 4%; and / or Zr 4+ : 0 to 4%; and / or Sb 3+ : 0 to 1%; and / or Sn 4+ : 0 to 1%; and / or Ce 4+ : 0 to 1%, where the Ln 3+ is La 3+ , Gd 3+ Y 3+ Yb 3+ one or more of; The anionic component also contains: Cl - + Br - + I - : 0 to 2%.

3. Near-infrared light-absorbing glass, characterized in that, In terms of mole percentage, the cationic component consists of P 5+ : 46 - 64%; Al 3+ : 0.5 - 10%; Na + : 8 - 27%; R 2+ : 0.1 - 15%; Zn 2+ : 2 - 15%; Cu 2+ : 1 - 15%; Li + : 0 - 4.5%; K + : 0 - 8%; Ln 3+ : 0 - 5%; Si 4+ : 0 - 4%; B 3+ : 0 - 4%; Zr 4+ : 0 - 4%; Sb 3+ : 0 - 1%; Sn 4+ : 0 - 1%; Ce 4+ : 0 - 1%, and the R 2+ is one or more of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , and Ln 3+ is one or more of La 3+ , Gd 3+ , Y 3+ , Yb 3+ ; The anionic component consists of O 2- : 88 to 100%; F - : 0 to 12%; Cl - + Br - + I - : composed of 0 to 2%.

4. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, The components are expressed in mole percentages, where: (Zn 2+ +Na + ) / Al 3+ is 2.0 to 35.0, preferably (Zn 2+ +Na + ) / Al 3+ is 3.5 to 25.0, more preferably (Zn 2+ +Na + ) / Al 3+ is 4.5 to 15.0, further preferably (Zn 2+ +Na + ) / Al 3+ is 5.0 to 9.

0.

5. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that The components are expressed in mole percentages, where: P 5+ / R 2+ is 4.5 or more, preferably P 5+ / R 2+ is 6.5 or more, more preferably P 5+ / R 2+ is 8.0 to 50.0, still more preferably P 5+ / R 2+ is 9.0 to 20.0, and the said R 2+ is Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ or one or more thereof.

6. The near-infrared light-absorbing glass according to any one of claims 1 to 3, wherein The components are expressed in mole percentages, where: Ba 2+ / Cu 2+ is 1.5 or less, preferably Ba 2+ / Cu 2+ is 1.0 or less, more preferably Ba 2+ / Cu 2+ is 0.8 or less, still more preferably Ba 2+ / Cu 2+ is 0.02 to 0.

5.

7. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that The components are expressed in mole percentages, where: (Cu 2+ +Li + ) / Zn 2+ is 0.1 to 5.0, preferably (Cu 2+ +Li + ) / Zn 2+ is 0.2 to 2.5, more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.3 to 1.5, and further preferably (Cu 2+ +Li + ) / Zn 2+ is 0.4 to 1.

0.

8. The near-infrared light absorbing glass according to any one of claims 1 to 3, characterized in that, The components are expressed in mole percentages, where: R 2+ / Zn 2+ is 0.05 to 5.0, preferably R 2+ / Zn 2+ is 0.1 to 3.0, more preferably R 2+ / Zn 2+ is 0.1 to 1.5, still more preferably R 2+ / Zn 2+ is 0.2 to 1.0, and the said R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ or one or more of them.

9. The near-infrared light-absorbing glass according to any one of claims 1 to 3, wherein Its components are expressed in mole percentages, where: Mg 2+ / Al 3+ is 0.01 to 5.0, preferably Mg 2+ / Al 3+ is 0.05 to 3.0, more preferably Mg 2+ / Al 3+ is 0.1 to 1.0, still more preferably Mg 2+ / Al 3+ is 0.1 to 0.

8.

10. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, Its components are expressed in mole percentages, where: F - / Zn 2+ is 3.0 or less, preferably F - / Zn 2+ is 0.05 to 2.0, more preferably F - / Zn 2+ is 0.1 to 1.0, still more preferably F - / Zn 2+ is 0.1 to 0.

7.

11. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, The components are expressed in mole percentages, where: (F - + Ba 2+ ) / Al 3+ is 8.0 or less, preferably (F - + Ba 2+ ) / Al 3+ is 5.0 or less, more preferably (F - + Ba 2+ ) / Al 3+ is 0.1 to 2.0, and further preferably (F - + Ba 2+ ) / Al 3+ is 0.5 to 1.

5.

12. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, Its components are expressed in mole percentages, where: P 5+ / (F - +Zn 2+ ) is 2.0 to 15.0, preferably P 5+ / (F - +Zn 2+ ) is 2.5 to 10.0, more preferably P 5+ / (F - +Zn 2+ ) is 3.0 to 8.5, further preferably P 5+ / (F - +Zn 2+ ) is 3.5 to 6.

5.

13. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, Its components are expressed in mole percentages, where: P 5+ : 51 - 61%, preferably P 5+ : 53 - 59%; and / or Al 3+ : 1 - 8%, preferably Al 3+ : 2 - 6%; and / or Na + : 11 - 25%, preferably Na + : 16 - 22%; and / or R 2+ : 0.5 - 10%, preferably R 2+ : 1 - 8%; and / or Zn 2+ : 4 - 12%, preferably Zn 2+ : 6 - 10%; and / or Cu 2+ : 2 - 12%, preferably Cu 2+ : 5 - 10%; and / or Li + : 0 - 3%, preferably Li + : 0 - 1%; and / or K + : 0 - 4%, preferably K + : 0 - 2%; and / or Ln 3+ : 0 - 2%, preferably Ln 3+ : 0 - 1%; and / or Si 4 + : 0 - 2%, preferably Si 4+ : 0 - 1%; and / or B 3+ : 0 - 2%, preferably B 3+ : 0 - 1%; and / or Zr 4+ : 0 - 2%, preferably Zr 4 + : 0 - 1%; 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%; and / or Ce 4+ : 0 - 0.5%, preferably Ce 4+ : 0 - 0.1%, the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ one or more of, Ln 3+ is La 3+ 、Gd 3+ 、Y 3+ 、Yb 3+ one or more of.

14. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, Its components are expressed in mole percentages, where: O 2- : 92 to 99.5%, preferably O 2- : 94 to 99%; and / or F - : 0.5 to 8%, preferably F - : 1 to 6%; and / or Cl - +Br - +I - : 0 to 1%, preferably Cl - +Br - +I - : 0 to 0.5%.

15. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that Its components are expressed in mole percentages, where: Mg 2+ : 0 to 8%, preferably Mg 2+ : 0.5 to 6%, more preferably Mg 2+ : 1 to 4%; and / or Ca 2+ : 0 to 8%, preferably Ca 2+ : 0 to 5%, more preferably Ca 2+ : 0 to 3%; and / or Sr 2+ : 0 to 8%, preferably Sr 2+ : greater than 0 but less than or equal to 5%, more preferably Sr 2+ : 0.5 to 3%; and / or Ba 2+ : 0 to 8%, preferably Ba 2+ : greater than 0 but less than or equal to 5%, more preferably Ba 2+ : 0.5 to 3%.

16. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, It does not contain Li in its components + ; and / or does not contain K + ; and / or does not contain Ln 3+ ; and / or does not contain Si 4+ ; and / or does not contain B 3+ ; and / or does not contain Zr 4+ ; and / or does not contain Cl - ; and / or does not contain Br - ; and / or does not contain I - ; and / or does not contain S 6+ ; and / or does not contain V 5+ wherein the Ln 3+ is one or more of La 3+ , Gd 3+ , Y 3+ , Yb 3+ .

17. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, The transition temperature of the near-infrared light-absorbing glass is below 400 °C, preferably below 390 °C, more preferably below 385 °C, and further preferably 350 - 380 °C; and / or the density is below 3.40 g / cm 3 below, preferably below 3.30 g / cm 3 below, more preferably below 3.10 g / cm 3 below, and further preferably below 3.05 g / cm 3 below; and / or the coefficient of thermal expansion is below 130×10 -7 / K, preferably below 125×10 -7 / K, more preferably 100×10 -7 / K - 120×10 -7 / K, and further preferably 110.5×10 -7 / K - 118×10 -7 / K; and / or the Young's modulus is 4800×10 7 / Pa or more, preferably 5000×10 7 / Pa or more, more preferably 5200×10 7 / Pa or more, and further preferably 5400×10 7 / Pa - 6000×10 7 / Pa; and / or the bubble grade is above grade A, preferably above grade A0, more preferably grade A 00 grade; and / or the striae grade is above grade C, preferably above grade B; and / or the viscosity at 1000 °C is 20.0 poise or less, preferably 10.0 poise or less, more preferably 5.0 poise or less.

18. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, Near-infrared light-absorbing glass with a thickness of 0.1 to 0.4 mm, in the spectral transmittance within the wavelength range of 500 to 700 nm, the wavelength λ corresponding to a transmittance of 50% 50 is 621 to 640 nm, preferably 624 to 638 nm, and more preferably 626 to 634 nm.

19. The near-infrared light-absorbing glass according to any one of claims 1 to 3, characterized in that, Near-infrared light-absorbing glass with a thickness of 0.1 to 0.4 mm, spectral transmittance τ at a wavelength of 400 nm 400 is 83.0% or more, preferably 84.0% or more, more preferably 85.0% or more; and / or spectral transmittance τ at a wavelength of 450 nm 450 is 86.0% or more, preferably 87.0% or more, more preferably 88.0% or more; and / or spectral transmittance τ at a wavelength of 500 nm 500 is 87.0% or more, preferably 88.0% or more, more preferably 89.0% or more; and / or spectral transmittance τ at a wavelength of 1100 nm 1100 is 10.0% or less, preferably 8.0% or less, more preferably 6.0% or less.

20. The near-infrared light-absorbing glass according to claim 18 or 19, characterized in that, The thickness of the near-infrared light absorbing glass is 0.15 to 0.35 mm, preferably 0.2 to 0.3 mm, more preferably 0.1 mm or 0.15 mm or 0.2 mm or 0.21 mm or 0.25 mm.

21. Near-infrared light-absorbing glass element, characterized in that, Containing the near-infrared light absorbing glass according to any one of claims 1 to 20.

22. A filter, characterized in that, Containing the near-infrared light absorbing glass according to any one of claims 1 to 20, or containing the near-infrared light absorbing glass element according to claim 21.

23. A device, characterized in that, Containing the near-infrared light absorbing glass according to any one of claims 1 to 20, or containing the near-infrared light absorbing glass element according to claim 21, or containing the filter according to claim 22.

Images