Near-infrared light absorbing glass

Abstract

The invention provides near-infrared light absorbing glass with excellent inherent quality. 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 + >; na < + >: 10.2 to 27%; r2 < + >: 0.1%-15%; zn < 2 + >: 2-15%; the ratio of (Zn < 2 + > + Na < + >) / Al < 3 + > is 2.0-35.0, and 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 absorption glass has excellent transmission characteristics in a visible light region, has excellent absorption characteristics in a near-infrared region, has excellent inherent quality and meets the use requirements of high-performance equipment.

Description

Technical Field

[0001] The present invention relates to glass, in particular to near-infrared light absorbing glass. Background Art

[0002] In recent years, the spectral sensitivity of semiconductor imaging devices such as CCDs and CMOS sensors used in digital cameras, camera phones, and VTR cameras has expanded from the visible to the near-infrared range. Using filters that absorb near-infrared light can achieve a degree of visual sensitivity close to that of the human eye. The average human eye can perceive visible light wavelengths between 400 and 700 nm. Therefore, using filters that absorb near-infrared light can produce images with brightness factors close to those of the human eye. The growing demand for filters to correct color sensitivity has correspondingly placed higher demands on the near-infrared light-absorbing glass used in these filters, requiring them to possess both excellent transmission properties in the visible region and excellent absorption properties in the near-infrared region.

[0003] Spectral characteristics determine the basic function of near-infrared absorbing glass. In addition to having the desired spectral characteristics, near-infrared absorbing glass also needs to have excellent internal quality (such as a high bubble level). If the glass components are not designed properly, it is easy to cause poor internal quality of the glass, such as poor bubble level (the presence of many bubbles and stones in the glass). Chinese patent CN102656125A discloses a near-infrared cutoff filter glass, which contains 16.2-25% Al 3+ , which can easily lead to the deterioration of the glass's near-infrared light absorption characteristics and the occurrence of internal quality defects such as stones, resulting in a poor glass bubble degree grade and the internal quality being difficult to meet the requirements of high-performance optical equipment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a near-infrared light absorbing glass with excellent intrinsic quality.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] (1) Near-infrared light absorbing glass, expressed in mole percentage, the cationic component contains: P 5+ :46~64%;Al 3+ :0.5~10%;Na + :10.2~27%;R 2+ :0.1~15%; Zn 2+ :2~15%;Cu 2+ :1~15%,of which (Zn 2+ +Na + ) / Al 3+ is 2.0~35.0, the R 2+Mg 2+ , Ca 2+ 、Sr 2+ 、Ba 2+ One or more of;

[0007] The anion component contains: O 2- :88~100%;F - :0~12%.

[0008] (2) The near-infrared light absorbing glass according to (1), wherein the cationic component further comprises, expressed in molar percentage: Li + :0~4.5%;and / or K + : 0-8%; and / or Ln 3+ :0~5%;and / or Si 4+ : 0-4%; and / or B 3+ :0~4%; and / or Zr 4+ :0~4%; and / or Sb 3+ : 0-1%; and / or Sn 4+ :0~1%;and / or Ce 4+ : 0~1%, the Ln 3+ For La 3+ 、Gd 3+ 、Y 3+ 、Yb 3+ One or more of;

[0009] The anion component also contains: Cl - +Br - +I - :0~2%.

[0010] (3) Near-infrared light absorbing glass, whose components contain P 5+ 、Al 3+ 、Na + 、R 2+ 、Zn 2+ and Cu 2+ , expressed as mole percentage, where (Zn 2+ +Na + ) / Al 3+ is 2.0~35.0, the R 2+ Mg 2+ , Ca 2+ 、Sr 2+ 、Ba 2+ One or more of the following, the bubble degree of the near-infrared light absorbing glass is above grade A, the near-infrared light absorbing glass with a thickness of 0.1 to 0.4 mm has a spectral transmittance within a wavelength range of 500 to 700 nm, and the wavelength λ corresponding to the transmittance reaching 50% is 50 It is 621~640nm.

[0011] (4) The near-infrared light-absorbing glass according to (3), wherein the components are expressed in mole percentages, and the cation components contain: P 5+ : 46 to 64%; and / or Al 3+ : 0.5 to 10%; and / or Na + : 10.2 to 27%; and / or R 2+ : 0.1 to 15%; and / or Zn 2+ : 2 to 15%; and / or Cu 2+ : 1 to 15%; and / or 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%, and the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ One or more of them, and Ln 3+ is La 3+ 、Gd 3 + 、Y 3+ 、Yb 3+ One or more of them;

[0012] The anion components contain: O 2- : 88 to 100%; and / or F - : 0 to 12%; and / or Cl - +Br - +I - : ~2%.

[0013] (5) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the components are expressed in mole percentages and satisfy one or more of the following 6 cases:

[0014] 1) (Zn 2+ +Na + ) / Al 3+ is 3.5 to 25.0, preferably (Zn 2+ +Na + ) / Al 3+is 4.5 to 15.0, more preferably (Zn 2+ +Na + ) / Al 3+ is 5.0 to 9.0;

[0015] 2) 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, further preferably P 5+ / R 2+ is 9.0 to 20.0;

[0016] 3) 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;

[0017] 4) (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;

[0018] 5) 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+ T / Zn 2+ is 0.2 to 1.0;

[0019] 6) 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, and the R 2+ is Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ or more of the above.

[0020] (6) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein its components are expressed in mole percentages and satisfy one or more of the following three cases:

[0021] 1) F - / Zn 2+ is below 3.0, preferably F - / Zn 2+ is 0.05 to 2.0, more preferably F - / Zn 2+ is 0.1 to 1.0, further preferably F - / Zn 2+ is 0.1 to 0.7;

[0022] 2) (F - +Ba 2+ ) / Al 3+ is below 8.0, preferably (F - +Ba 2+ ) / Al 3+ is below 5.0, more preferably (F - +Ba 2+ ) / Al 3+ is 0.1 to 2.0, further preferably (F - +Ba 2+ ) / Al 3+ is 0.5 to 1.5;

[0023] 3) 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 - +Zn2+ ) is 3.5 to 6.5.

[0024] (7) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the components are expressed in mole percentages, where: P 5+ : 51 to 61%, preferably P 5+ : 53 to 59%; and / or Al 3+ : 1 to 8%, preferably Al 3+ : 2 to 6%; and / or Na + : 11 to 25%, preferably Na + : 16 to 22%; and / or R 2+ : 0.5 to 10%, preferably R 2+ : 1 to 8%; and / or Zn 2+ : 4 to 12%, preferably Zn 2+ : 6 to 10%; and / or Cu 2+ : 2 to 12%, preferably Cu 2+ : 5 to 10%; and / or Li + : 0 to 3%, preferably Li + : 0 to 1%; and / or K + : 0 to 4%, preferably K + : 0 to 2%; and / or Ln 3+ : 0 to 2%, preferably Ln 3+ : 0 to 1%; and / or Si 4+ : 0 to 2%, preferably Si 4+ : 0 to 1%; and / or B 3+ : 0 to 2%, preferably B 3+ : 0 to 1%; and / or Zr 4+ : 0 to 2%, preferably Zr 4+ : 0 to 1%; 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%; and / or Ce 4+ : 0 to 0.5%, preferably Ce 4+ : 0 to 0.1%, where the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ One or more of them, Ln 3+ is La 3+ 、Gd 3+ 、Y 3+ 、Yb 3+ One or more of them.

[0025] (8) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the components are expressed in mole percentages, and: 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%.

[0026] (9) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the components are expressed in mole percentages, and: 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%.

[0027] (10) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the components do not contain Li + ; and / or do not contain K + ; and / or do not contain Ln 3+ ; and / or do not contain Si 4+ ; and / or do not contain B 3+ ; and / or do not contain Zr 4+ ; and / or do not contain Cl - ; and / or do not contain Br - ; and / or do not contain I - ; and / or do not contain S 6+ ; and / or do not contain V 5+ , where the Ln 3+ is La 3+ , Gd 3+ , Y 3+ , Yb 3+One or more of the above.

[0028] (11) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the transformation temperature of the near-infrared light-absorbing glass is 400 °C or lower, preferably 390 °C or lower, more preferably 385 °C or lower, and further preferably 350 to 380 °C; and / or the density is 3.40 g / cm 3 or lower, preferably 3.30 g / cm 3 or lower, more preferably 3.10 g / cm 3 or lower, and further preferably 3.05 g / cm 3 or lower; and / or the coefficient of thermal expansion is 130×10 -7 / K or lower, preferably 125×10 -7 / K or lower, more preferably 100×10 -7 / K to 120×10 -7 / K, and further preferably 110.5×10 -7 / K to 118×10 -7 / K; and / or the Young's modulus is 4800×10 7 / Pa or higher, preferably 5000×10 7 / Pa or higher, more preferably 5200×10 7 / Pa or higher, and further preferably 5400×10 7 / Pa to 6000×10 7 / Pa; and / or the bubble degree is grade A or higher, preferably grade A0 or higher, and more preferably grade A 00 grade; and / or the striae degree is grade C or higher, preferably grade B or higher; and / or the viscosity at 1000 °C is 20.0 poise or lower, preferably 10.0 poise or lower, and more preferably 5.0 poise or lower.

[0029] (12) The near-infrared light-absorbing glass according to any one of (1) to (4), for the 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 50 corresponding to a transmittance of 50% is 621 to 640 nm, preferably 624 to 638 nm, and more preferably 626 to 634 nm.

[0030] (13) The near-infrared light-absorbing glass according to any one of (1) to (4), for the near-infrared light-absorbing glass with a thickness of 0.1 to 0.4 mm, the spectral transmittance τ 400 at a wavelength of 400 nm is 83.0% or higher, preferably 84.0% or higher, and more preferably 85.0% or higher; and / or the spectral transmittance τ 450is more than 86.0%, preferably more than 87.0%, and more preferably more than 88.0%; and / or the spectral transmittance τ at a wavelength of 500 nm 500 is more than 87.0%, preferably more than 88.0%, and more preferably more than 89.0%; and / or the spectral transmittance τ at a wavelength of 1100 nm 1100 is 10.0% or less, preferably 8.0% or less, and more preferably 6.0% or less.

[0031] (14) The near-infrared light-absorbing glass according to any one of (1) to (4), wherein the thickness of the near-infrared light-absorbing glass is 0.15 to 0.35 mm, preferably 0.2 to 0.3 mm, and more preferably 0.1 mm or 0.15 mm or 0.2 mm or 0.21 mm or 0.25 mm.

[0032] (15) A near-infrared light-absorbing glass element, containing the near-infrared light-absorbing glass according to any one of (1) to (14).

[0033] (16) A filter, containing the near-infrared light-absorbing glass according to any one of (1) to (14), or containing the near-infrared light-absorbing glass element according to (15).

[0034] (17) An apparatus, containing the near-infrared light-absorbing glass according to any one of (1) to (14), or containing the near-infrared light-absorbing glass element according to (15), or containing the filter according to (16).

[0035] The beneficial effects of the present invention are: through reasonable component design, the near-infrared light-absorbing glass obtained by the present invention has excellent transmittance characteristics in the visible light region, excellent absorption characteristics in the near-infrared region, and excellent internal quality, meeting the use requirements of high-performance devices. Detailed Embodiments

[0036] 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 parts, 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.

[0037] [Near-infrared Light-absorbing Glass]

[0038] The ranges of the components (constituents) that make up the near-infrared light-absorbing glass of the present invention will be described below. In this specification, unless otherwise specified, the content of the cationic components is expressed as the mole percentage (mol%) of the cationic components in all the cationic components, and the content of the anionic components is expressed as the mole percentage (mol%) of the anionic components in all the anionic components; the ratio between the contents of the cationic components is the ratio of the mole percentage contents between the cationic components; the ratio between the contents of the anionic components is the ratio of the mole percentage contents between the anionic components; the ratio between the contents of the cationic and anionic components is the ratio between the mole percentage content of the cationic components in all the cationic components and the mole percentage content of the anionic components in all the anionic components.

[0039] 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, 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.

[0040] It should be noted that the ionic valences of the components described below are representative values used for convenience and have no difference 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 of existing in other ionic valence states, which is also within the protection scope of this patent.

[0041] <Cationic components>

[0042] 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 the content of P 5+ 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 the content of P 5+ exceeds 64%, the devitrification tendency of the glass increases, and at the same time, the abrasion degree of the glass becomes poor, and the grinding processability becomes poor. Therefore, in the present invention, the content of P 5+ is 46 - 64%, preferably 51 - 61%, and more preferably 53 - 59%.

[0043] 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 poor, and the near-infrared light absorption characteristics become poor. Therefore, in the present invention, Al 3+The content is 0.5 to 10%, preferably 1 to 8%, more preferably 2 to 6%.

[0044] Li + can improve the fusibility of the glass, but in the present invention, if the content of Li + is too high, the near-infrared absorption property of the glass decreases, and the devitrification resistance and stability become poor. Therefore, in the present invention, the content of Li + is 0 to 4.5%, preferably 0 to 3%, more preferably 0 to 1%. In some embodiments, it is further preferred not to contain Li + .

[0045] Na + can improve the visible light transmittance of the glass, optimize the near-infrared light absorption performance and striation of the glass, but if its content is too high, the thermal expansion coefficient of the glass becomes poor. Therefore, in the present invention, the content of Na + is 10.2 to 27%, preferably 11 to 25%, more preferably 16 to 22%.

[0046] K + can reduce the melting temperature of the glass, but if its content exceeds 8%, the chemical stability of the glass decreases, the abrasion degree of the glass becomes poor, and the grinding processability becomes poor. Therefore, in the present invention, the content of K + is 0 to 8%, preferably the content of K + is 0 to 4%, more preferably the content of K + is 0 to 2%. In some embodiments, it is further preferred not to contain K + .

[0047] R 2+ (R 2+ is one or more of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ ) can improve the fusibility of the glass and increase the strength of the glass, but if the content of R 2+ 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%.

[0048] In some embodiments, the ratio P 5+ between the content of P 2+ and the content of R 5+ / R 2+ is controlled to be 4.5 or more, which can increase the Young's modulus and striation of the glass and prevent the glass transition temperature from rising. Therefore, it is preferred that P 5+ / R 2+ is 4.5 or more, more preferably P 5+ / R 2+ is above 6.5, and P is further preferably 5+ / R 2+ is from 8.0 to 50.0, and P is even more preferably 5+ / R 2+ is from 9.0 to 20.0.

[0049] Mg 2+ can improve the chemical stability of the glass. If its content exceeds 8%, the visible light transmittance of the glass has a tendency to decrease, and the high-temperature viscosity of the glass increases. Therefore, Mg 2+ content is from 0 to 8%, and preferably Mg 2+ content is from 0.5 to 6%, and even more preferably Mg 2+ content is from 1 to 4%.

[0050] In some embodiments, the ratio Mg 2+ content to Al 3+ content, Mg 2+ / 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, preferably Mg 2+ / Al 3+ is from 0.01 to 5.0, and even more preferably Mg 2+ / Al 3+ is from 0.05 to 3.0, and further preferably Mg 2+ / Al 3+ is from 0.1 to 1.0, and even further preferably Mg 2+ / Al 3 + is from 0.1 to 0.8.

[0051] Ca 2+ can lower the melting temperature of the glass and lower the liquidus temperature of the glass, but if its content is too high, the devitrification resistance of the glass decreases. Therefore, Ca 2+ content is from 0 to 8%, preferably from 0 to 5%, and even more preferably from 0 to 3%.

[0052] Sr 2+ can improve the weather resistance of the glass, but if its content is too high, the near-infrared absorption property of the glass decreases, and the thermal expansion coefficient becomes larger. Therefore, Sr 2+ content is from 0 to 8%, preferably greater than 0 but less than or equal to 5%, and even more preferably from 0.5 to 3%.

[0053] Ba 2+ can lower the high-temperature viscosity of the glass and improve the transmittance of the glass in the visible light region, but if its content is too high, the weather resistance of the glass becomes poor and the devitrification resistance decreases. Therefore, Ba 2+The content is 0 to 8%, preferably greater than 0 but less than or equal to 5%, and more preferably 0.5 to 3%.

[0054] Zn 2+ 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%, and more preferably 6 to 10%.

[0055] In some embodiments, by controlling the total content of Zn 2+ and Na + Zn 2+ +Na + and the ratio between the content of Al 3+ (Zn 2+ +Na + ) / Al 3+ within the range of 2.0 to 35.0, the bubble degree of the glass can be increased and the stripe degree of the glass can be prevented from deteriorating. Therefore, it is preferred that (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.

[0056] In some embodiments, the ratio R 2+ of the content of R 2+ to the content of Zn 2+ / Zn 2+ is controlled within the range of 0.05 to 5.0, and the bubble degree of the glass can be increased and the density of the glass can be reduced. Therefore, it is preferred that R 2+ / Zn 2+ is 0.05 to 5.0, more preferably R 2+ / Zn 2+ is 0.1 to 3.0, further preferably R 2+ / Zn 2+ is 0.1 to 1.5, and even more preferably R 2+ / Zn 2+ is 0.2 to 1.0.

[0057] 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 glass to achieve the design requirements for near-infrared absorption performance. 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 1-15%, preferably 2-12%, more preferably 5-10%.

[0058] In some embodiments, by controlling the ratio Ba 2+ / Cu 2+ between the content of Ba 2+ and the content of Cu 2+ to be below 1.5, the glass can more easily obtain the spectral characteristics desired in the present invention while reducing the thermal expansion coefficient and density of the glass. Therefore, it is preferred that Ba 2+ / Cu 2+ is below 1.5, more preferably Ba 2+ / Cu 2+ is below 1.0, further preferably Ba 2+ / Cu 2+ is below 0.8, and even more preferably Ba 2+ / Cu 2+ is 0.02-0.5.

[0059] In some embodiments, by controlling the ratio (Cu 2+ +Li + ) / Zn 2+ between the total content of Cu + and Li 2+ and the content of Zn 2 + +Li + ) / Zn 2+ within the range of 0.1-5.0, the high-temperature viscosity of the glass can be reduced while the striation degree of the glass is improved. Therefore, it is preferred that (Cu 2+ +Li + ) / Zn 2+ is 0.1-5.0, more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.2-2.5, further preferably (Cu 2 + +Li + ) / Zn 2+ is 0.3-1.5, and even more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.4-1.0.

[0060] Ln 3+ (Ln 3+ is La 3+ , Gd 3+ , Y 3+ , Yb 3+ One or more of them) 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%, more preferably 0 to 1%. In some embodiments, it is further preferably free of Ln 3+ .

[0061] 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 unmelted impurities are likely to form 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%, more preferably 0 to 1%. In some embodiments, it is further preferably free of Si 4+ .

[0062] B 3+ can lower 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%, more preferably 0 to 1%. In some embodiments, it is further preferably free of B 3+ .

[0063] 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, the content of Zr 4+ is 0 to 4%, preferably 0 to 2%, more preferably 0 to 1%. In some embodiments, it is further preferably free of Zr 4+ .

[0064] Sb 3+ , Sn 4+ , Ce 4+ 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, the contents of Sb 3+ , Sn 4+ , Ce 4+ are each 0 to 1%, preferably 0 to 0.5%, more preferably 0 to 0.1%.

[0065] <Anion component>

[0066] O 2- is an important anionic component in the glass of the present invention. It can stabilize the glass network structure to form a stable glass and also ensure that the Cu ions in the glass exist in the form of Cu 2+ , thereby ensuring the property of the glass of the present invention to absorb light in the near-infrared region. If the content of O 2- is too small, it is difficult to form a stable glass, and Cu 2+ is easily reduced to Cu + , making it difficult to achieve the effect of absorbing light in the near-infrared region; however, when the content of O 2- is too high, the melting temperature of the glass will be relatively high, resulting in a decrease in the spectral transmittance in the visible light region. Therefore, in the present invention, the content of O 2- is 88-100%, preferably 92-99.5%, and more preferably 94-99%.

[0067] F - can reduce the melting temperature of the glass and the high-temperature viscosity of the glass. Appropriate content is beneficial to improving the anti-crystallization performance of the glass. If the content of F - exceeds 12%, the transmittance of the glass in the visible light region decreases, the near-infrared light absorption property decreases, and at the same time the stability of the glass decreases. During the glass melting process, F - is volatile, causing environmental pollution, and the glass is prone to form stripes, resulting in poor striation. Therefore, the content of F - is 0-12%, preferably 0.5-8%, and more preferably 1-6%.

[0068] In some embodiments, the ratio F - between the content of F 2+ and the content of Zn - / Zn 2+ is controlled below 3.0, which can reduce the glass transition temperature while optimizing the high-temperature viscosity of the glass. Therefore, it is preferred that F - / 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, and even more preferably F - / Zn 2+ is 0.1-0.7.

[0069] In some embodiments, the ratio of the total content of F - and Ba 2+ F - +Ba 2+ to the content of Al 3+ (F- +Ba 2+ ) / Al 3+ Controlled below 8.0, while increasing the Young's modulus of the glass, it is possible to prevent the coefficient of thermal expansion of the glass from deteriorating. Therefore, it is preferred that (F - +Ba 2+ ) / Al 3+ is below 8.0, more preferably (F - +Ba 2+ ) / Al 3+ is below 5.0, even more preferably (F - +Ba 2 + ) / Al 3+ is 0.1 - 2.0, and even more preferably (F - +Ba 2+ ) / Al 3+ is 0.5 - 1.5.

[0070] In some embodiments, by controlling the ratio between the content of P 5+ and the total content of F - and Zn 2+ P - +Zn 2+ / (F 5+ +Zn - +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, it is preferred that P 5+ / (F - +Zn 2+ ) is 2.0 - 15.0, more preferably P 5+ / (F - +Zn 2+ ) is 2.5 - 10.0, even more preferably P 5+ / (F - +Zn 2+ ) is 3.0 - 8.5, and even more preferably P 5+ / (F - +Zn 2+ ) is 3.5 - 6.5.

[0071] 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%, 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 - .

[0072] <Components not contained>

[0073] 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.

[0074] 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 until the processing process and the disposal after productization. Therefore, in the case of attaching importance to the environmental impact, 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.

[0075] In some embodiments, in order to obtain the near-infrared light-absorbing glass with excellent performance of the present invention, it is preferred not to contain S 6+ . In some embodiments, in order to prevent the transmittance in the visible light region from deteriorating, it is preferred not to contain V 5+ .

[0076] "Not containing" and "0%" as described herein 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 will be certain impurities or components that are not intentionally added and will be contained in small amounts or traces in the final near-infrared light-absorbing glass. Such a situation is also within the scope of protection of this invention patent.

[0077] [Manufacturing method]

[0078] 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.

[0079] 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 formed body by various processes. The formed body includes but is not limited to sheets. The processes include but are not limited to slit drawing, float process, roll pressing and other processes for forming sheets well-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.

[0080] The near-infrared light-absorbing glass of the present invention can be used to manufacture a glass formed body of a sheet by methods such as grinding or polishing, but the methods for manufacturing the glass formed body are not limited to these methods.

[0081] The near-infrared light-absorbing glass described in the present invention can have any reasonable and useful thickness.

[0082] Next, the properties of the near-infrared light-absorbing glass of the present invention will be described.

[0083] <Transition temperature>

[0084] The transition temperature (T g ) of the glass is tested according to the method specified in 《GB / T7962.16-2010》.

[0085] 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.

[0086] <Density>

[0087] The density (ρ) of the glass is tested according to the method specified in 《GB / T7962.20-2010》.

[0088] In some embodiments, the density (ρ) of the near-infrared light-absorbing glass of the present invention is 3.40 g / cm 3 or less, preferably 3.30 g / cm 3Hereinafter, it is more preferably 3.10 g / cm 3 Hereinafter, it is further preferably 3.05 g / cm 3 Hereinafter.

[0089] <Coefficient of thermal expansion>

[0090] The coefficient of thermal expansion (α 20-120 ℃) of the glass is tested according to the method specified in "GB / T 7962.16 - 2010".

[0091] 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, and further preferably 110.5×10 -7 / K to 118×10 -7 / K.

[0092] <Young's modulus>

[0093] The Young's modulus (E) of the glass is calculated by measuring the longitudinal wave velocity and transverse wave velocity using ultrasonic waves and then according to the following formula.

[0094]

[0095] Wherein, in the formula:

[0096] E is the Young's modulus, Pa;

[0097] G is the shear modulus, Pa;

[0098] V T is the transverse wave velocity, m / s;

[0099] V S is the longitudinal wave velocity, m / s;

[0100] ρ is the glass density, g / cm 3 .

[0101] 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, and further preferably 5400×10 7 / Pa to 6000×10 7 / Pa.

[0102] <Bubble degree>

[0103] The bubble degree of the glass is tested according to the method specified in "GB / T7962.8-2010".

[0104] 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, and more preferably grade A 00 grade.

[0105] <Striae degree>

[0106] The striae degree of the glass is checked by comparing with a standard specimen in the direction where the 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.

[0107] Table 1. Striae degree grade table

[0108] Level Degree of streaks A No visible streaks to the naked eye under the specified detection conditions B There are fine and scattered streaks under the specified detection conditions C There are slight parallel streaks under the specified detection conditions D There are rough parallel streaks under the specified detection conditions

[0109] 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.

[0110] <High-temperature viscosity>

[0111] 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. The numerical unit is dPaS (poise). The smaller the value, the lower the viscosity.

[0112] 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, and more preferably 5.0 poise or less.

[0113] <Spectral transmittance>

[0114] 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, which is also called the external transmittance.

[0115] In some embodiments, when the thickness of the near-infrared light-absorbing glass is 0.1 - 0.4 mm, the spectral transmittance has one or more of the following characteristics:

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] In some embodiments, when the thickness of the near-infrared light-absorbing glass is 0.1 - 0.4 mm, in the spectral transmittance in the wavelength range of 500 - 700 nm, the wavelength (λ 50 ) corresponding to a transmittance of 50% is 621 - 640 nm, preferably 624 - 638 nm, and more preferably 626 - 634 nm.

[0121] In the above spectral transmittance test, the thickness of the near-infrared light-absorbing glass is preferably 0.15 - 0.35 mm, more preferably 0.2 - 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.

[0122] [Near-Infrared Light-Absorbing Glass Element]

[0123] The near-infrared light-absorbing glass element according to the present invention contains the above-mentioned near-infrared light-absorbing glass, and examples thereof include a sheet-like glass element or a lens used in a near-infrared light-absorbing filter, which is suitable for color correction applications of solid-state imaging elements and has various excellent properties of the above glass.

[0124] Moreover, the thickness of the near-infrared light-absorbing glass element (the interval between the incident surface and the exit surface of the transmitted light) is determined by the transmittance characteristics of the element, preferably 0.1 - 0.4 mm, more preferably 0.15 - 0.35 mm, further preferably 0.2 - 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 in the wavelength range of 500 - 700 nm, the wavelength (λ 50 ) corresponding to a transmittance of 50% is 621 - 640 nm, preferably 624 - 638 nm, and more preferably 626 - 634 nm. In order to obtain such a near-infrared light-absorbing glass element, the composition of the glass is adjusted within the range described in the specification of the present invention, and processed into a glass element having the above spectral characteristics and thickness.

[0125] [Filter]

[0126] The filter involved in the present invention is a near-infrared filter, which contains the above-mentioned near-infrared light-absorbing glass or the above-mentioned near-infrared light-absorbing glass element. Through this element, the color correction function of the filter is given, and at the same time, various excellent properties of the above-mentioned glass are also possessed.

[0127] [Equipment]

[0128] 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.), video cameras, vehicle-mounted devices, display devices, and monitoring devices.

[0129] Examples

[0130] <Examples of Near-Infrared Light-Absorbing Glass>

[0131] In order to further clearly explain and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0132] In this example, glass with the compositions shown in Tables 2 to 4 was obtained by using the above-mentioned manufacturing method of 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.

[0133] Table 2.

[0134]

[0135]

[0136] Table 3.

[0137]

[0138]

[0139] Table 4.

[0140]

[0141]

[0142] The near-infrared light-absorbing glass made from the examples described in Tables 2 to 4 above 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 testing method described in the specification of the present invention. The results are shown in Tables 5 to 7.

[0143] Table 5.

[0144] 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

[0145] Table 6.

[0146]

[0147]

[0148] Table 7.

[0149] Example 1# 2# 3# 4# 5# 6# 7# 8# <![CDATA[τ 400 (%)]]> 85.5 85.4 85.2 85.6 85.4 85.5 85.8 85.3 <![CDATA[τ 450 (%)]]> 88.5 88.3 88.2 88.5 88.4 88.4 88.9 88.4 <![CDATA[τ 500 (%)]]> 89.8 89.6 89.5 89.6 89.6 89.8 90.0 89.6 <![CDATA[τ 1100 (%)]]> 5.2 5.3 5.5 5.2 5.4 5.3 5.0 5.3 <![CDATA[λ 50 (nm)]]> 630 632 631 629 630 629 631 630

[0150] <Examples of Near-Infrared Light-Absorbing Glass Elements>

[0151] The near-infrared light-absorbing glass of Examples 1 to 24# of the present invention is made into near-infrared light-absorbing glass elements by a method well known in the art. Examples include sheet-like near-infrared light-absorbing glass elements or lenses used in near-infrared light-absorbing filters, which are suitable for color correction applications of solid-state imaging elements and have various excellent properties of the above glass.

[0152] <Examples of Filters>

[0153] The near-infrared light-absorbing glass and / or near-infrared light-absorbing glass elements of Examples 1 to 24# of the present invention are 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.

[0154] <Examples of Equipment>

[0155] The near-infrared light-absorbing glass and / or near-infrared light-absorbing glass elements and / or filters of the present invention can be manufactured 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 in imaging devices and apparatuses for the automotive field.

Claims

1. Near-infrared light-absorbing glass, characterized in that, In terms of mole percentage, the cationic component contains: P 5+ : 46 to 64%; Al 3+ : 0.5 to 10%; Na + : 10.2 to 27%; R 2+ : 0.1 to 15%; Zn 2+ : 2 to 15%; Cu 2+ : 1 to 15%, where (Zn 2+ + Na + ) / Al 3+ is 2.0 to 35.0, and the said R 2+ is one or more of Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ ; 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 cationic 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+ or one or more of them; The anionic component also contains: Cl - + Br - + I - : 0 to 2%.

3. Near-infrared light-absorbing glass, characterized in that, Its components contain P 5+ , Al 3+ , Na + , R 2+ , Zn 2+ and Cu 2+ , expressed in mole percentage, where (Zn 2+ + Na + ) / Al 3+ is 2.0 to 35.0, the said R 2+ is one or more of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , the bubble degree of the near-infrared light absorbing glass is above grade A. For the 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, when the transmittance reaches 50%, the corresponding wavelength λ 50 is 621 to 640 nm.

4. The near-infrared light-absorbing glass according to claim 3, wherein Its components are expressed in mole percentages, and the cationic component contains: P 5+ : 46 - 64%; and / or Al 3+ : 0.5 - 10%; and / or Na + : 10.2 - 27%; and / or R 2+ : 0.1 - 15%; and / or Zn 2+ : 2 - 15%; and / or Cu 2+ : 1 - 15%; and / or Li + : 0 - 4.5%; and / or K + : 0 - 8%; and / or Ln 3+ : 0 - 5%; and / or Si 4+ : 0 - 4%; and / or B 3+ : 0 - 4%; and / or Zr 4+ : 0 - 4%; and / or Sb 3+ : 0 - 1%; and / or Sn 4+ : 0 - 1%; and / or Ce 4+ : 0 - 1%, where the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ one or more of them, and Ln 3+ is La 3+ 、Gd 3+ 、Y 3+ 、Yb 3+ one or more of them; The anionic component contains: O 2- : 88 to 100%; and / or F - : 0 to 12%; and / or Cl - + Br - + I - : 0 to 2%.

5. The near-infrared light-absorbing glass according to any one of claims 1 to 4, characterized in that, Its components are expressed in mole percentages and satisfy one or more of the following six cases: 1) (Zn 2+ + Na + ) / Al 3+ is 3.5 to 25.0, preferably (Zn 2+ + Na + ) / Al 3+ is 4.5 to 15.0, more preferably (Zn 2+ + Na + ) / Al 3+ is 5.0 to 9.0; 2)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, further preferably P 5 + / R 2+ is 9.0 to 20.0; 3) 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; 4)(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, still more preferably (Cu 2+ +Li + ) / Zn 2+ is 0.4 to 1.0; 5) 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; 6) Mg 2+ / Al 3+ is from 0.01 to 5.0, preferably Mg 2+ / Al 3+ is from 0.05 to 3.0, more preferably Mg 2+ / Al 3+ is from 0.1 to 1.0, further preferably Mg 2+ / Al 3+ is from 0.1 to 0.8, and the R 2+ is Mg 2+ 、Ca 2+ 、Sr 2+ 、Ba 2+ or one or more of them.

6. The near-infrared light-absorbing glass according to any one of claims 1 to 4, characterized in that, Its components are expressed in mole percentages and satisfy one or more of the following three cases: 1) 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; 2)(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, further preferably (F - +Ba 2+ ) / Al 3+ is 0.5 to 1.5; 3) 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.

7. The near-infrared light-absorbing glass according to any one of claims 1 to 4, wherein Their components are expressed in mole percentages, where: P 5+ : 51 to 61%, preferably P 5+ : 53 to 59%; and / or Al 3+ : 1 to 8%, preferably Al 3+ : 2 to 6%; and / or Na + : 11 to 25%, preferably Na + : 16 to 22%; and / or R 2+ : 0.5 to 10%, preferably R 2+ : 1 to 8%; and / or Zn 2+ : 4 to 12%, preferably Zn 2+ : 6 to 10%; and / or Cu 2+ : 2 to 12%, preferably Cu 2+ : 5 to 10%; and / or Li + : 0 to 3%, preferably Li + : 0 to 1%; and / or K + : 0 to 4%, preferably K + : 0 to 2%; and / or Ln 3+ : 0 to 2%, preferably Ln 3+ : 0 to 1%; and / or Si 4 + : 0 to 2%, preferably Si 4+ : 0 to 1%; and / or B 3+ : 0 to 2%, preferably B 3+ : 0 to 1%; and / or Zr 4+ : 0 to 2%, preferably Zr 4 + : 0 to 1%; 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%; and / or Ce 4+ : 0 to 0.5%, preferably Ce 4+ : 0 to 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.

8. The near-infrared light-absorbing glass according to any one of claims 1 to 4, wherein 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%.

9. The near-infrared light-absorbing glass according to any one of claims 1 to 4, 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%.

10. The near-infrared light absorbing glass according to any one of claims 1 to 4, 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+ .

11. The near-infrared light-absorbing glass according to any one of claims 1 to 4, characterized in that, The transformation 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 to 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 to 120×10 -7 / K, and further preferably 110.5×10 -7 / K to 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 to 6000×10 7 ]> / Pa; and / or the bubble degree is above grade A, preferably above grade A0, more preferably grade A 00 grade; and / or the striae degree is above grade C, preferably above grade B; and / or the viscosity at 1000 °C is 20.0 poises or less, preferably 10.0 poises or less, more preferably 5.0 poises or less.

12. The near-infrared light-absorbing glass according to any one of claims 1 to 4, 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.

13. The near-infrared light-absorbing glass according to any one of claims 1 to 4, characterized in that, Near-infrared light-absorbing glass with a thickness of 0.1 to 0.4 mm, and the spectral transmittance τ at a wavelength of 400 nm 400 is 83.0% or more, preferably 84.0% or more, and 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, and 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, and 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, and more preferably 6.0% or less.

14. The near-infrared light-absorbing glass according to claim 12 or 13, 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, and more preferably 0.1 mm or 0.15 mm or 0.2 mm or 0.21 mm or 0.25 mm.

15. Near-infrared light-absorbing glass element, characterized in that, Containing the near-infrared light-absorbing glass according to any one of claims 1 to 14.

16. A filter, characterized in that, Containing the near-infrared light-absorbing glass according to any one of claims 1 to 14, or containing the near-infrared light-absorbing glass element according to claim 15.

17. A device, characterized in that, Containing the near-infrared light-absorbing glass according to any one of claims 1 to 14, or containing the near-infrared light-absorbing glass element according to claim 15, or containing the filter according to claim 16.

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