Low-fog environmentally friendly anti-halation photoelectric glass and its preparation method and application

Abstract

The present invention provides a low-fog environmentally friendly anti-halation photoelectric glass and a preparation method and application thereof. The glass composition comprises the following components by mass percentage: SiO2 61-72%, K2CO3 1-4%, Na2CO3 5-10%, Li2O 0.3-1%, ZnO 0.5-1%, B2O3 7-15%, Bi2O3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 0.5-2% and SnO2 0.1-2%. The anti-halation photoelectric glass prepared by the glass composition has low haze and high transmittance, and has good acid resistance stability and moisture resistance stability, good mechanical properties and processing properties, and is suitable for various high-transmittance, high-precision optical instrument lenses, and can be applied to national defense military low-light night vision devices and other instruments and equipment requiring high image clarity.

Description

Technical Field

[0001] The invention relates to special glass materials, in particular to a low-fog environmentally friendly anti-halation photoelectric glass and a preparation method and application thereof. Background Art

[0002] Any discussion of the prior art throughout the specification should not be considered as an admission that such prior art is widely known or forms part of the common general knowledge in the field.

[0003] Anti-halo photoelectric glass is a light-transmitting glass with a special anti-halo layer. It is a key material for low-light-level night vision devices. It is mainly used to improve the image resolution and sensitivity of low-light-level night vision devices. It is widely used in aerospace, national defense and military, astronomical observation, engineering monitoring and other fields.

[0004] The surface of the anti-halo photoelectric glass is equipped with an anti-halo layer, and its light-transmitting area is the effective area of ​​the anti-halo glass, which makes the glass have a higher light transmittance in the ultraviolet, visible light and near-infrared bands. The anti-halo layer is a black glass layer formed after the surface of the glass substrate is blackened. It is formed by adding reducible ions to the glass and heating it to a specific temperature to contact reducing gas (such as hydrogen). This layer can withstand a temperature of about 500°C without affecting the shape and performance. The black glass layer has low transmittance to visible light. Its main function is to form a high-efficiency absorption layer with a non-reflective interface around the effective area, thereby absorbing internal scattered light and reflected light, especially scattered light from defects such as stripes and bubbles, thereby improving the performance of the anti-halo photoelectric glass. In order to ensure that the black layer can effectively absorb stray light, its thickness cannot be too thin, which requires precise control of the concentration of reducing ions in the glass.

[0005] In the glass melting process, adding As2O3, Sb2O3, PbO and other raw materials and using nitrates can improve the stray light absorption capacity and clarification effect of the black layer. However, these raw materials will produce heavy metal pollution such as arsenic, antimony and lead, and nitrates will produce nitrogen oxides (NO X ) cause significant pollution to the environment. In addition, these substances have a corrosive effect on the platinum crucible used in the glass melting process. The corroded platinum particles form "flash points" in the glass, causing irregular scattering of the light incident inside the glass, thereby increasing the haze of the anti-halo photoelectric glass and reducing the light transmission performance of the effective area of ​​the anti-halo photoelectric glass.

[0006] At present, higher requirements are put forward for the performance of anti-halation photoelectric glass, especially in terms of haze, transmittance and environmental protection. Therefore, it is particularly important to develop an anti-halation photoelectric glass with low haze, high transmittance and environmental friendliness. This requires innovative material formulations and optimized production processes to reduce the impact on the environment, while improving photoelectric performance to meet the strict requirements of high-end applications such as military and aerospace.

[0007] The purpose of the present invention is to overcome or improve at least one disadvantage of the prior art, or to provide a useful alternative. Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprises", etc. should be interpreted from an inclusive perspective rather than an exclusive or exhaustive perspective; that is, from the perspective of "including, but not limited to". Summary of the invention

[0008] Therefore, the present invention provides an anti-halation photoelectric glass composition, an anti-halation photoelectric glass prepared from the composition, and a preparation method and application thereof. The anti-halation photoelectric glass provided by the present invention has good performance, not only in terms of haze, transmittance and environmental protection, but also has good chemical stability and good processing performance, and can be applied to various high-transmittance, high-precision optical instruments.

[0009] Specifically, the present invention provides the following technical features, and the combination of one or more of the following technical features constitutes the technical solution of the present invention.

[0010] In a first aspect of the present invention, an anti-halation photoelectric glass composition is provided, which comprises or consists of the following components, measured by mass percentage: SiO2 61-72%, K2CO3 1-4%, Na2CO3 5-10%, Li2O 0.3-1%, ZnO 0.5-1%, B2O3 7-15%, Bi2O3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 0.1-2% and SnO2 0.1-2%.

[0011] In an embodiment of the present invention, the anti-halation photoelectric glass composition contains SiO2, K2CO3, Na2CO3, Li2O, ZnO, B2O3, Bi2O3, MgO, CaO, NaCl and SnO2 at the same time. By precisely controlling the components and contents of SiO2, K2CO3, Na2CO3, Li2O, ZnO, B2O3, Bi2O3, MgO, CaO, NaCl and SnO2, the glass material composed of the glass composition of the present invention has excellent comprehensive properties, including chemical stability, thermal stability, optical transmittance and stray light absorption rate after reduction blackening.

[0012] Among them, the integrated effect of SiO2, ZnO, B2O3 and MgO jointly improves the thermal stability and chemical stability of glass. As the main component, SiO2 provides the basis of the structure; the synergistic effect of CaO, B2O3 and ZnO adjusts the thermal expansion coefficient and enhances the chemical stability. The addition of MgO further improves the corrosion resistance of glass in complex environments and prolongs its service life. The introduction of Li2O improves the optical quality of glass, improves the optical transmittance of glass materials, and further improves the fluidity and processing performance of glass. The introduction of ZnO and Bi2O3 significantly increases the refractive index and reduces dispersion, while Li2O enhances transparency. In addition, by adjusting the content of Li2O and ZnO, the crystallization tendency of glass is effectively reduced, and the transmittance of glass after molding is further improved. In addition, B2O3, as a flux, accelerates the dissolution and clarification of glass and reduces the difficulty of glass molding. The joint action of K2CO3, Na2CO3, NaCl and SnO2 reduces the difficulty of glass clarification and reduces defects such as bubbles and streaks during glass melting.

[0013] On this basis, by controlling the content and proportion of reducing substance Bi2O3, environmentally friendly clarifiers NaCl and SnO2, and low-corrosive substances K2CO3 and Na2CO3, the glass material having the glass composition of the present invention has the advantages of low haze and high transmittance. In some embodiments of the present invention, the haze of the prepared 20mm glass sample can be less than 0.20%, and the optical transmittance in the effective light transmission area within the wavelength range of 450nm-780nm can be greater than 86.8%, which is particularly suitable for making anti-halation photoelectric glass.

[0014] And, on this basis, by controlling the contents of CaO, K2CO3, Na2CO3, NaCl, SnO and B2O3, the viscosity of the molten glass can be reduced and the difficulty of glass molding can be reduced; by controlling the contents of Li2O, ZnO, NaCl and SnO2, the tendency of glass crystallization can be reduced and the permeability of the glass after molding can be improved. By controlling the contents of SiO2, ZnO and MgO, the chemical stability of the glass can be improved, the corrosion resistance of the glass in complex environments can be improved, and the service life of the glass can be extended. By controlling the contents of K2CO3, Na2CO3, NaCl and SnO2, the difficulty of glass clarification can be reduced, and defects such as bubbles in the glass melting process can be reduced. The above comprehensive control makes the glass material composed of the glass composition of the present invention easier to mold, has higher transparency and optical properties, and also enhances the chemical stability and durability of the glass. The improved processing performance not only involves a smoother process of glass melting and molding, reduces production costs and energy consumption, but also reduces defects in the production process, such as bubbles and impurities, thereby improving the quality of glass products. In addition, the improved chemical stability and corrosion resistance extend the service life of the glass and expand its application range in complex environments.

[0015] In the present invention, SiO2 is a glass-forming oxide. As the main component of glass, it provides the basic framework of the structure and gives the glass good chemical stability and mechanical strength. The appropriate SiO2 content can reduce the thermal expansion coefficient of the glass and improve the thermal stability, chemical stability, softening temperature, heat resistance, hardness and mechanical strength of the glass. Too high a content of SiO2 may lead to an increase in the melting point and difficulty in processing; too low a content of SiO2 may weaken the chemical stability and mechanical strength. In an embodiment of the present invention, the content of SiO2 is 61-72% by mass. In some embodiments of the present invention, the content of SiO2, measured in mass percentage, can be further selected from the following content ranges or any value in the following content ranges: 62-72%, 65-72%, 67-72%, 70-72%, 71-72%, 71.1-72%, 71.5-72%, 61-71.5%, 62-71.5%, 65-71.5%, 67-71.5%, 70-71.5%, 71-71.5%, 71.1 -71.5%, 61-71.1%, 62-71.1%, 65-71.1%, 67-71.1%, 70-71.1%, 71-71.1%, 61-71%, 62-71%, 65-71%, 67-71%, 70-71%, 61-70%, 62-70%, 65-70%, 67-70%, 61-67%, 62-67%, 65-67%, 61-65%, 62-65%, 61-62%, etc. In some preferred embodiments of the present invention, the content of SiO2 by mass percentage is 65-71.5%, more preferably 65-71.1% or 65-67%.

[0016] In the present invention, B2O3, as a glass-forming oxide, plays a key role in forming a structural network with silicate tetrahedrons in borosilicate glass through its unique boron-oxygen triangle [BO3] and boron-oxygen tetrahedron [BO4] structural units. B2O3 can not only reduce the viscosity of glass at high temperatures, promote melting and clarification, but also increase the viscosity of glass at low temperatures and expand the forming temperature range. However, excessive addition of B2O3 may cause boron anomaly due to the increase in boron-oxygen triangles, resulting in an increase in the glass expansion coefficient and a decrease in chemical stability. At the same time, the introduction of ZnO is intended to reduce the thermal expansion coefficient of glass and enhance thermal and chemical stability, but too high a ZnO content may promote crystallization, affect light transmittance, mechanical strength and chemical stability, while too low a ZnO content may lead to insufficient thermal stability.

[0017] ZnO and B2O3 can have a synergistic effect to significantly improve the properties of glass. The addition of B2O3 helps to lower the melting point and adjust the melt viscosity, while ZnO promotes the melting and forming process of glass by improving thermal and chemical stability and fine-tuning the refractive index, while improving the optical properties and production efficiency of glass. In addition, their combination also enhances the corrosion resistance of glass, especially its resistance to water and acid.

[0018] Therefore, in order to achieve better glass properties, it is very important to accurately control the ratio and total amount of ZnO and B2O3. In an embodiment of the present invention, the content of B2O3 is 7-15% by mass. In some embodiments of the present invention, the content of B2O3 is further selected from the following content ranges or any value in the following content ranges by mass: 10-15%, 11-15%, 12-15%, 14-15%, 7-14%, 10-14%, 11-14%, 12-14%, 7-12%, 10-12%, 11-12%, 7-11%, 10-11%, 7-10%, etc. In some preferred embodiments of the present invention, the content of B2O3 is 7-14% by mass, more preferably 7-11% or 11-14%.

[0019] In an embodiment of the present invention, the content of ZnO is 0.5-1% by mass percentage. In some embodiments of the present invention, the content of ZnO is further selected from the following content ranges or any value in the following content ranges by mass percentage: 0.6-1%, 0.8-1%, 0.5-0.8%, 0.6-0.8%, 0.5-0.6%, etc. In some preferred embodiments of the present invention, the content of ZnO is 0.5-0.8% by mass percentage, preferably 0.5-0.6%.

[0020] In some embodiments of the present invention, the content of ZnO is less than one-fifth of the content of B2O3; preferably, the content ratio of ZnO to B2O3 is not less than 0.04, and the content ratio is preferably 0.04-0.15, and more preferably 0.045-0.075.

[0021] In the present invention, Li2O can combine with oxygen atoms in the glass network to form Li-O bonds, which helps to enhance the network structure of the glass and improve the physical properties of the glass. Moreover, in the present invention, the introduction of Li2O can reduce the tendency of crystal formation in the cooling and solidification process of the glass, help to maintain the amorphous state of the glass, and can improve the optical transparency of the glass, thereby making the glass more transparent, improving the optical transmittance of the glass, and reducing the haze of the glass. In addition, the addition of Li2O helps to reduce the melting temperature of the glass, improve its rheological properties, make the glass easier to form and process, and also can moderately adjust the thermal expansion coefficient of the glass and enhance its thermal stability. However, it should be noted that the amount of Li2O used needs to be precisely controlled, because excessive introduction of Li2O will reduce the chemical stability of the glass, and may cause crystallization and phase separation of the glass, which will damage the uniformity and optical properties of the glass. On the contrary, if the content of Li2O is too low, it is not enough to improve the performance of the glass and limit the application range of the material. Therefore, it is important to precisely control the amount of Li2O added to achieve optimal glass performance. In an embodiment of the present invention, the content of Li2O is 0.3-1% by mass percentage. In some embodiments of the present invention, the content of Li2O can be further selected from the following content ranges or any value in the following content ranges by mass percentage: 0.4-1%, 0.5-1%, 0.57-1%, 0.3-0.57%, 0.4-0.57%, 0.5-0.57%, 0.3-0.5%, 0.4-0.5%, 0.3-0.4%, etc. In some preferred embodiments of the present invention, the content of Li2O is 0.4-1%, more preferably 0.57-1% or 0.4-0.57%, by mass percentage.

[0022] In the present invention, the addition of Bi2O3 can improve the refractive index and dispersion ability. Bi2O3 also helps to improve the thermal stability of glass and enhance the light absorption ability. At the same time, since the Bi element (usually introduced as Bi2O3 or Bi(NO3)3) can be reduced to black in a high-temperature hydrogen atmosphere, this property can be used to optimize the anti-halation effect. However, the introduction of Bi2O3 requires precise control. Excessive addition of Bi2O3 may lead to a significant reduction in the chemical stability of the glass, especially when reacting with reducing gases, its stability problem is more prominent. In addition, high concentrations of Bi2O3 may cause serious erosion to the melting container during the glass melting process, which limits its application range in glass production. In addition, too much Bi2O3 may also promote glass crystallization, affecting its transparency and optical uniformity. On the contrary, insufficient Bi2O3 content makes it difficult to improve optical properties. Therefore, in order to balance the benefits and potential adverse effects of Bi2O3 and ensure the best glass performance, in an embodiment of the present invention, the content of Bi2O3 is 0.1-1.5% by mass percentage. In some embodiments of the present invention, the content of Bi2O3, by mass percentage, can be further selected from the following content ranges or any value in the following content ranges: 0.3-1.5%, 0.5-1.5%, 0.6-1.5%, 0.8-1.5%, 1-1.5%, 0.1-1%, 0.3-1%, 0.5-1%, 0.6-1%, 0.8-1%, 0.1-0.8%, 0.3-0.8%, 0.5-0.8%, 0.6-0.8%, 0.1-0.6%, 0.3-0.6%, 0.5-0.6%, 0.1-0.5%, 0.3-0.5%, 0.1-0.3%, etc. In some preferred embodiments of the present invention, by mass percentage, the content of Bi2O3 is 0.1-0.5% or 0.5-1.5%.

[0023] In an embodiment of the present invention, the present invention further contains no more than 4.5% of alkaline earth metal oxides in terms of mass percentage, and the alkaline earth metal is oxidized to CaO and MgO. In the present invention, the introduction of CaO can increase the chemical stability and mechanical strength of the glass, but when the amount introduced is large, it is easy to cause the glass to crystallize and reduce the thermal stability of the glass. At the same time, CaO can reduce the viscosity of the glass at high temperatures, which is conducive to clarification; the introduction of MgO can improve the thermal stability of the glass, and the introduction of MgO will reduce the thermal expansion coefficient of the glass, but too much MgO will increase the viscosity of the glass, resulting in difficulty in glass molding. MgO and CaO together enhance the mechanical strength and chemical durability of the glass in the present invention, and the addition of MgO is particularly helpful in reducing the increase in the thermal expansion coefficient caused by CaO.

[0024] In the present invention, the addition of CaO can significantly increase the chemical stability and mechanical strength of the glass, and provide the glass with better durability and compressive resistance. At the same time, CaO helps to reduce the viscosity of the glass at high temperatures, promotes the clarification process, and improves the optical quality of the glass. However, excessive use of CaO may induce glass crystallization, thereby reducing the thermal stability of the glass. In contrast, the introduction of MgO effectively improves the thermal stability of the glass, mainly by reducing the thermal expansion coefficient of the glass, which helps the glass to maintain stability and consistency when the temperature changes. However, the excessive introduction of MgO may increase the viscosity of the glass, which may cause difficulties in the molding process. Under the joint action of these two oxides, CaO and MgO can compensate for each other's shortcomings and achieve synergistic enhancement of advantages. In particular, the addition of MgO is particularly helpful in alleviating the impact of the increase in the thermal expansion coefficient caused by CaO. This complementary effect enables the glass to have better thermal stability and molding performance while maintaining good chemical stability and mechanical strength. By precisely controlling the ratio and total amount of CaO and MgO, the complementary effect between them can be effectively utilized, which not only enhances the mechanical strength and chemical durability of the glass, but also provides an important process strategy for producing high-quality glass by finely adjusting the thermal expansion behavior and rheological properties of the glass. Moreover, it is particularly important that the content of CaO should be higher than that of MgO. In an embodiment of the present invention, the content of MgO is 0.3-0.5% by mass. In some embodiments of the present invention, the content of MgO is further selected from the following content range or any value in the following content range by mass percentage: 0.4-0.5%, 0.3-0.4%, and so on. In an embodiment of the present invention, the content of CaO is 1-4% by mass percentage. In some embodiments of the present invention, the content of CaO is further selected from the following content range or any value in the following content range by mass percentage: 2-4%, 1-2%, and so on. In some preferred embodiments of the present invention, the content ratio of MgO to CaO is less than 0.5, preferably 0.075-0.4, more preferably 0.075-0.125, or 0.075-0.1 or 0.125-0.1.

[0025] In the present invention, the co-introduction of NaCl and SnO2 in glass manufacturing can play a complementary and synergistic role, especially in reducing the melting temperature of glass, improving optical properties and improving the overall quality of glass. NaCl can promote the fluidity of glass melt, help dissolve and melt glass, and at the same time, as a clarifier to a certain extent, help reduce bubbles and impurities in glass. However, it should be noted that excessive use of NaCl may affect the chemical stability of glass and increase the risk of corrosion. On the other hand, the addition of SnO2 can not only further reduce the melting temperature of glass, but also significantly improve the chemical stability and wear resistance of glass, so that glass has better optical properties and transparency. SnO2 can also effectively reduce bubbles and impurities in glass, and synergize with NaCl to further improve the quality and clarification effect of glass. In addition, the characteristics of SnO2 in providing conductivity and photocatalysis add additional functionality to glass. However, the excessive introduction of NaCl and SnO2 may also cause a series of problems, such as NaCl may lead to reduced chemical stability, while too much SnO2 may increase costs and affect the specific properties of glass. On the contrary, if the content of NaCl and SnO2 is too low, the glass may not be significantly improved. Therefore, in order to balance their complementary and synergistic effects and ensure that the glass has excellent properties, in an embodiment of the present invention, the content of NaCl and SnO2 is 0.2-4% by mass. In some embodiments of the present invention, the content of NaCl is 0.1-2% by mass. In some embodiments of the present invention, the content of SnO2 is 0.1-2% by mass. In some embodiments of the present invention, the content of NaCl is further selected from the following content ranges or any value in the following content ranges by mass: 0.5-2%, 1-2%, 1.5-2%, 0.1-1.5%, 0.5-1.5%, 1-1.5%, 0.1-1%, 0.5-1%, 0.1-0.5%, and so on. In some preferred embodiments of the present invention, the content of NaCl is 1-2% by mass. In some embodiments of the present invention, the content of SnO2 is measured by mass percentage, and can be further selected from the following content ranges or any value in the following content ranges: 0.5-2%, 1-2%, 1.5-2%, 0.1-1.5%, 0.5-1.5%, 1-1.5%, 0.1-1%, 0.5-1%, 0.1-0.5%, etc. In some preferred embodiments of the present invention, the content of SnO2 is 1-2% by mass percentage. In some preferred embodiments of the present invention, the ratio of NaCl to SnO2 is 1:1.

[0026] In the present invention, K2CO3 and Na2CO3, as one of the main components of glass raw materials, not only have the ability to promote glass melting and stability, and reduce the melting temperature, but also can be used as an effective clarifier to eliminate bubbles in the melting process. These two carbonates have a complementary and partial synergistic effect in the glass production process, and jointly optimize the production process of glass and the quality of the final product. In addition, K2CO3 and Na2CO3 also have an impact on the physical and chemical properties of glass. For example, the thermal expansion coefficient of glass is adjusted, the hardness and wear resistance of glass are affected, and the refractive index and light transmittance of glass are optimized by changing the structure of the glass network. In addition, K2CO3 and Na2CO3 can jointly adjust the chemical composition of glass, so that the glass melt has good fluidity and stability at a lower temperature, which helps to improve production efficiency and reduce energy consumption. Therefore, it is necessary to accurately control the ratio and total amount of these two carbonates. In an embodiment of the present invention, the content of K2CO3 and Na2CO3 is 6-14% by mass percentage. In some embodiments of the present invention, the content of K2CO3 is 1-4% by mass percentage. In some embodiments of the present invention, the content of Na2CO3 is 5-10% by mass. In some embodiments of the present invention, the content of K2CO3 is further selected from the following content ranges or any value in the following content ranges by mass: 2-4%, 1-2%, and the like. In some embodiments of the present invention, the content of Na2CO3 is further selected from the following content ranges or any value in the following content ranges by mass: 6.5-10%, 8-10%, 5-8%, 6.5-8%, 5-6.5%, and the like. In some preferred embodiments of the present invention, the content of Na2CO3 is greater than the content of K2CO3, preferably the content ratio of K2CO3 to Na2CO3 is not higher than 0.5, and the content ratio is preferably 0.15-0.5, more preferably 0.4.

[0027] In some embodiments of the present invention, the anti-halation photoelectric glass composition comprises the following components, measured by mass percentage: SiO2 62-72%, K2CO3 2-4%, Na2CO3 5-10%, Li2O 0.4-1%, ZnO 0.5-1%, B2O3 7-14%, Bi2O3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 1-2% and SnO2 1-2%.

[0028] In some embodiments of the present invention, the anti-halation photoelectric glass composition comprises the following components, measured by mass percentage: SiO2 65-72%, K2CO3 2-4%, Na2CO3 5-10%, Li2O 0.4-1%, ZnO 0.5-1%, B2O3 7-14%, Bi2O3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 1-2% and SnO2 1-2%.

[0029] In some embodiments of the present invention, the anti-halation photoelectric glass composition comprises the following components, measured by mass percentage: SiO2 65-72%, K2CO3 2-4%, Na2CO3 5-10%, Li2O 0.4-0.6%, ZnO 0.5-1%, B2O3 11-14%, Bi2O3 0.1-0.5%, MgO 0.3-0.4%, CaO 1-4%, NaCl 1-2% and SnO2 1-2%.

[0030] In some embodiments of the present invention, the anti-halation photoelectric glass composition comprises the following components, measured by mass percentage: SiO2 65-67%, K2CO3 2-4%, Na2CO3 5-10%, Li2O 0.5-1%, ZnO 0.5-1%, B2O3 7-11%, Bi2O3 0.5-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 1-2% and SnO2 1-2%.

[0031] In some embodiments of the present invention, the anti-halation photoelectric glass composition comprises the following components, measured by mass percentage: SiO2 67-71%, K2CO3 2-4%, Na2CO3 5-10%, Li2O 0.4-1%, ZnO 0.5-1%, B2O3 7-14%, Bi2O3 0.1-1.5%, MgO 0.4-0.5%, CaO 1-4%, NaCl 1-2% and SnO2 1-2%.

[0032] In some embodiments of the present invention, the glass material prepared from the anti-halo photoelectric glass composition of the present invention has a haze of less than 0.20% in the effective light transmission area when the thickness is 20 mm, and the optical transmittance of the effective light transmission area in the wavelength range of 450 nm-780 nm is greater than 86.8%. For example, in some embodiments of the present invention, when the thickness of the obtained glass material is 20 mm, the haze of the effective light transmission area is less than 0.20%, the maximum optical transmittance of the effective light transmission area in the wavelength range of 450 nm-780 nm is greater than 90.1%, and the minimum optical transmittance is greater than 86.8%. For example, in some other embodiments of the present invention, the glass material prepared from the anti-halo photoelectric glass composition of the present invention, especially the prepared anti-halo photoelectric glass, has a haze of 0.1-0.19% in the effective light transmission area when the thickness is 20 mm, the maximum optical transmittance of the effective light transmission area in the wavelength range of 450 nm-780 nm is 90.1-91.8%, and the minimum optical transmittance is 86.8-91%.

[0033] And, in some embodiments of the present invention, the glass material prepared from the anti-halation photoelectric glass composition of the present invention has a lower thermal expansion coefficient, which can reduce the dimensional change caused by temperature change and maintain the accuracy and stability of the equipment. For example, in some embodiments of the present invention, the thermal expansion coefficient (α 20-300℃ ) is not higher than 59.1×10 -7 / ℃, in some preferred embodiments, the thermal expansion coefficient of the anti-halation photoelectric glass of the present invention in the temperature range of 20-300℃ is (57.1-59.1)×10 -7 / ℃.

[0034] And, in some embodiments of the present invention, the glass material prepared from the anti-halation photoelectric glass composition of the present invention has a lower softening point temperature, which is conducive to molding and processing, and is conducive to saving energy and reducing production costs, especially in large-scale production processes. For example, in some embodiments of the present invention, the softening point temperature of the glass prepared from the anti-halation photoelectric glass composition of the present invention is not higher than 785°C, and in some preferred embodiments, the softening point temperature of the anti-halation photoelectric glass of the present invention is 770-785°C.

[0035] In a second aspect of the present invention, an anti-halation photoelectric glass blank is provided, which is prepared from the anti-halation photoelectric glass composition described in the first aspect.

[0036] In some embodiments of the present invention, the method for preparing the anti-halation photoelectric glass blank comprises:

[0037] The raw materials are mixed, the mixture is melted at 1350-1450°C, stirred, clarified, and molded at 1050-1150°C.

[0038] In some embodiments of the present invention, the mixture is melted at 1350-1450° C. and stirred at a rotation speed of 10-40 r / min for 10-14 h.

[0039] There are certain requirements for the uniformity of the liquid before glass molding, so the liquid glass before molding needs to be stirred at a certain speed for a period of time to improve its uniformity. When the uniformity of the liquid is low, the liquid is prone to stratification or agglomeration, making it difficult to melt and homogenize the glass, and even causing streaks or stone defects in severe cases.

[0040] In some embodiments of the present invention, the melting time is 8-30 hours. At this melting temperature, it is helpful for the glass liquid to be clarified.

[0041] In some embodiments of the present invention, the molding temperature is 1050-1150° C. and the molding time is 5-25 minutes. Rapid molding of glass can prevent the generation of secondary bubbles and impurities.

[0042] In the third aspect of the present invention, an anti-halation photoelectric glass is provided, which comprises a light-transmitting effective area, wherein the glass composition of the light-transmitting effective area is as described in the first aspect above, or is made of the anti-halation photoelectric glass blank described in the second aspect above.

[0043] In some embodiments of the present invention, the anti-halation photoelectric glass further comprises an anti-halation layer, and the anti-halation layer is obtained by blackening the aforementioned light-transmitting effective area glass.

[0044] For example, the light-transmitting effective area glass described in the present invention can be a glass with a certain shape, size or surface state obtained by annealing and cold working the anti-halation photoelectric glass blank described in the second aspect above (which can be selected and adjusted according to needs, such as obtaining a step-type glass). The glass is blackened to form an anti-halation layer on its surface.

[0045] In some embodiments of the present invention, the blackening treatment is carried out in a reducing atmosphere, the blackening treatment time is 4000-16000 min, the pressure is 0.01-0.5 MPa, and the temperature is 500-650°C. In some embodiments of the present invention, the reduction treatment is carried out in a hydrogen atmosphere, and there are multiple cycles of inflation and deflation during the entire reduction process, and a cycle period is 160-300 min. For example, in one embodiment, the blackening treatment is carried out in a reducing atmosphere, the blackening treatment temperature is 620°C, the pressure is 0.18 MPa, and the time is 68 h.

[0046] In some embodiments of the present invention, when the thickness of the anti-halation photoelectric glass is 20 mm, the haze of its effective light transmission area is less than 0.20%, and the optical transmittance of its effective light transmission area in the wavelength range of 450 nm-780 nm is greater than 86.8%.

[0047] In some embodiments of the present invention, when the thickness of the anti-halation photoelectric glass is 20 mm, the haze of its effective light transmission area is less than 0.20%, the maximum optical transmittance of its effective light transmission area within the wavelength range of 450 nm-780 nm is greater than 90.1%, and the minimum optical transmittance is greater than 86.8%.

[0048] In some embodiments of the present invention, when the thickness of the anti-halation photoelectric glass is 20 mm, the haze of its effective light transmission area is 0.10-0.19%, the maximum optical transmittance of its effective light transmission area within the wavelength range of 450 nm-780 nm is 90.1-91.8%, and the minimum optical transmittance is 86.8-91%.

[0049] In some embodiments of the present invention, the thickness of the anti-halation layer is ≥0.32 mm, and the thickness may be further ≥0.35 mm, ≥0.40 mm, ≥0.45 mm, ≥0.50 mm, ≥0.55 mm, ≥0.58 mm, or even ≥0.59 mm. For example, in some embodiments of the present invention, the thickness of the anti-halation layer is 0.32-0.59 mm, and may be further 0.40-0.59 mm, and further 0.50-0.59 mm.

[0050] Furthermore, the anti-halation photoelectric glass of the present invention has a lower thermal expansion coefficient, which can reduce the dimensional change caused by temperature change and maintain the accuracy and stability of the equipment. In some embodiments of the present invention, the thermal expansion coefficient (α 20-300℃ ) is not higher than 59.1×10 -7 / ℃, in some preferred embodiments, the thermal expansion coefficient of the anti-halation photoelectric glass of the present invention in the temperature range of 20-300℃ is (57.1-59.1)×10 -7 / ℃.

[0051] Furthermore, the anti-halation photoelectric glass of the present invention has a lower softening point temperature, which is conducive to molding and processing, and is conducive to saving energy and reducing production costs, especially in large-scale production processes. In some embodiments of the present invention, the softening point temperature of the anti-halation photoelectric glass of the present invention is not higher than 785°C, and in some preferred embodiments, the softening point temperature of the anti-halation photoelectric glass of the present invention is 770-785°C.

[0052] Furthermore, the anti-halation photoelectric glass of the present invention has excellent acid resistance stability and moisture resistance stability, both of which are grade 1, and can maintain the stability of the internal structure of the glass for a long time.

[0053] In a fourth aspect of the present invention, a method for preparing the anti-halation photoelectric glass according to the third aspect is provided, comprising:

[0054] The raw materials are mixed, the mixture is melted at 1350-1450° C., stirred, clarified, and formed at 1050-1150° C. to obtain an anti-halo photoelectric glass blank; after annealing, cold working treatment is performed to obtain glass with a certain shape, size or surface state (which can be selected and adjusted as needed), the glass is blackened to form an anti-halo layer on the surface of the glass, and then the glass with the anti-halo layer formed on the surface is surface treated to obtain the anti-halo photoelectric glass.

[0055] In an embodiment of the present invention, annealing is performed to eliminate internal stress of the glass to meet the requirements of subsequent cold working, and the annealing temperature is 500-620°C.

[0056] In the embodiments of the present invention, the purpose of the cold working is mainly to precisely modify the shape, size and surface state of the glass to meet specific application requirements, and such operations include but are not limited to cutting, edge grinding, etc. For example, in some embodiments of the present invention, the glass obtained after annealing is subjected to rounding, rolling, slicing and stepping to obtain stepped glass. The glass is then subjected to blackening treatment.

[0057] In the embodiments of the present invention, the surface treatment includes but is not limited to grinding, polishing and cutting, polishing, etc., to adjust the surface state of the glass, such as flatness and smoothness, etc. A suitable treatment method can be selected according to needs. For example, in some embodiments of the present invention, the step-shaped glass obtained after cold processing is subjected to blackening treatment, an anti-halation layer is formed on the surface of the step-shaped glass, and then the upper and lower surfaces of the step-shaped glass with anti-halation on the surface are ground and polished to remove the anti-halation layer, and the anti-halation layers on other surfaces are retained to obtain a step-shaped anti-halation photoelectric glass.

[0058] In some embodiments of the present invention, the blackening treatment is carried out in a reducing atmosphere (such as hydrogen), the blackening treatment time is 4000-16000 min, the pressure is 0.01-0.5 MPa, and the temperature is 500-650°C. In some embodiments of the present invention, the reduction treatment is carried out in a hydrogen atmosphere, and there are multiple cycles of inflation and deflation during the entire reduction process, and a cycle period is 160-300 min. For example, in one embodiment, the blackening treatment is carried out in a reducing atmosphere, the blackening treatment temperature is 620°C, the pressure is 0.18 MPa, and the time is 68h.

[0059] The method of the present invention has process stability, and the glass material prepared by the process method can show stable characteristics, and will not cause significant fluctuations in glass performance due to the increase or decrease of the process within the range. Of course, it can be understood that within the process range, some higher temperatures can shorten the preparation process compared to lower temperatures. If it is necessary to shorten the time cost as much as possible, those skilled in the art can choose a relatively higher temperature within the temperature range disclosed in the present invention when operating.

[0060] In a fifth aspect of the present invention, an optical element is provided, which is made of the anti-halation photoelectric glass composition described in the first aspect, or includes the anti-halation photoelectric glass described in the third aspect.

[0061] In some embodiments of the present invention, the optical element is an optical lens or an optical window.

[0062] In the sixth aspect of the present invention, there is provided an application of the anti-halo photoelectric glass composition described in the first aspect, or the anti-halo photoelectric glass blank described in the second aspect, or the anti-halo photoelectric glass described in the third aspect, or the optical element described in the fifth aspect in the optical field or the application field of intelligent technology.

[0063] In some embodiments of the present invention, the application is to be used as an optical lens or an optical window.

[0064] In some embodiments of the present invention, the application is for preparing an optical lens for a low-light-level night vision device.

[0065] The specific technical features described in all the embodiments of the various aspects of the present invention can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further explain various possible combinations.

[0066] Unless otherwise specified, the numerical range described in the present invention includes all the numerical values ​​within this range, and includes the range value composed of any two numerical values ​​within this range. For example, 0.5-1.5%, this numerical range includes all the numerical values ​​between 0.5-1.5%, and includes the range value (0.51-1.49%) composed of any two numerical values ​​within this range (for example: 0.51%, 1.49%); different numerical values ​​of the same indicator appearing in all embodiments of the present invention can be arbitrarily combined to form a range value.

[0067] Through one or more of the above technical means, the following beneficial effects can be achieved:

[0068] The present invention provides a glass composition, which contains SiO2, K2CO3, Na2CO3, Li2O, ZnO, B2O3, Bi2O3, MgO, CaO, NaCl and SnO2 at the same time. By precisely controlling the components and contents of SiO2, K2CO3, Na2CO3, Li2O, ZnO, B2O3, Bi2O3, MgO, CaO, NaCl and SnO2, the glass material having the composition has excellent comprehensive properties, including chemical stability, thermal stability, optical transmittance and stray light absorption rate after blackening treatment, etc. The glass material is particularly suitable for preparing anti-halation photoelectric glass.

[0069] The anti-halo photoelectric glass provided by the present invention has low haze and high transmittance, and is environmentally friendly. The haze of the effective light transmission area of ​​the glass provided by the present invention is less than 0.20% when the thickness is 20mm. In the visible light range of 450-780nm, the maximum transmittance is ≥90.1%, and the minimum transmittance is ≥86.8%. In addition, the anti-halo photoelectric glass provided by the present invention has good acid resistance stability and moisture resistance stability, and its grade is Class I, and the mechanical properties and processing properties are good. It is suitable for the optical field or the application field of intelligent technology, and can be used for various high-transmittance, high-precision optical instrument lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein:

[0071] Figure 1 It is a comparison curve of the effective area transmittance of the glass products (20 mm thickness) of Example 2 and Comparative Example 3 in the wavelength range of 450-1000 nm.

[0072] Figure 2 It is a comparison chart of the haze in the effective area of ​​the glass materials of Examples 1 to 7 and Comparative Examples 1 to 7. DETAILED DESCRIPTION

[0073] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturer.

[0074] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. The reagents or raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents or raw materials used in the present invention are used in a conventional manner in the art or in accordance with the product instructions. In addition, any method and material similar to or equivalent to the described content can be applied to the method of the present invention. The preferred implementation methods and materials described in the text are for demonstration purposes only.

[0075] The performance parameters in the following embodiments are measured according to the following methods:

[0076] The thermal expansion coefficient α of the glass sample was tested using the DIL 402 expansion coefficient tester produced by NETZSCH, Germany. Sample preparation: The glass sample was polished into a cylindrical glass strip of Φ6×50mm, and the two end surfaces were parallel. The heating rate was set to 5℃ / min, and the data acquisition cycle was 20ms. (GB / T 7962.16~2010)

[0077] The softening point temperature of the glass sample was tested using the Model PPV-1000 / 1200 plate viscometer produced by Orton. Sample preparation: The glass sample was polished into a cylindrical glass strip of Φ6x6 mm, and the two end faces were parallel. The sample was placed between the top and bottom discs, which were made of a heat-resistant metal alloy with a diameter of 44 mm and a thickness of 6 mm. The top metal disc was connected to the bottom of the probe rod. Two very thin platinum films (40 mm in diameter and 0.001 inches thick) were placed between the sample and the top and bottom discs to facilitate sampling and sample placement. (ASTM C-1351M)

[0078] The transmittance test was carried out using a UV-visible-infrared spectrophotometer.

[0079] After the surface of the polished glass sample is corroded by the test medium with acidity of pH2.9, pH4.6, and pH6.0, observe the time when the purple-blue interference color appears on the glass surface, or the surface becomes mottled or falls off under an incandescent lamp. The acid resistance stability of colorless optical glass is classified in descending order according to the length of time. (GB / T 7962.14~2010)

[0080] Polished glass samples are kept at a constant temperature and humidity of 50°C and 85% relative humidity for 20 hours, and the moisture resistance stability of colorless optical glass is classified in descending order by comparing the turbidity values ​​with those of standard samples H (BaK7) and H (ZK9). (GB / T7962.15~2010)

[0081] Use a haze tester to test the haze of glass samples. Sample preparation: grind and polish the glass sample into a circular glass sheet of Φ32×20mm. The spectral response is the CIE spectral function Y / V(λ), the wavelength range is 400-700nm, the wavelength interval is 10nm, and the resolution is 0.01 unit. (GB / T 2410)

[0082] The present invention will be further described below in conjunction with the embodiments.

[0083] Example 1

[0084] The glass composition and physical properties of this example are shown in Table 1.

[0085] Preparation method: Quartz sand, potassium carbonate, sodium carbonate, lithium oxide, zinc oxide, boric acid, bismuth oxide, magnesium oxide, calcium oxide, sodium chloride, and tin oxide are used as raw materials. After being fully mixed, they are melted at 1350℃ for 8h, mechanically stirred (10r / min, 10h), assisted by high-temperature clarification, and molded or pressed at 1050℃ (molding time is 5min) to obtain glass blanks. The glass blanks are placed in an annealing furnace heated to 550℃ in advance for annealing to eliminate the stress in the glass to meet the requirements of later cold processing.

[0086] After annealing, the glass blank is subjected to a series of cold processing steps such as rounding, rolling, slicing and stepping to obtain a step-type glass, which is then placed in a blackening reduction furnace, and the blackening program is set. The blackening temperature is 620°C, the reducing gas hydrogen pressure is 0.18MPa, and the blackening time is 68h. After the blackening treatment is completed, an anti-halation layer is formed on the surface of the glass. Finally, the upper and lower surfaces of the step-type glass with an anti-halation layer on the surface are polished to remove the blackening layer, and the anti-halation layer on the other surfaces is retained to obtain an anti-halation photoelectric glass.

[0087] Example 2

[0088] The glass composition and physical properties of this example are shown in Table 1.

[0089] Preparation method: melting temperature is 1400°C, melting time is 16h; mechanical stirring (30r / min, 12h), molding temperature is 1100°C, molding time is 15min, other preparation steps and parameters are the same as Example 1.

[0090] Example 3

[0091] The glass composition and physical properties of this example are shown in Table 1.

[0092] Preparation method: melting temperature is 1450°C, melting time is 30h; mechanical stirring (40r / min, 14h), molding temperature is 1150°C, molding time is 25min, and other preparation steps and parameters are the same as those in Example 1.

[0093] Example 4

[0094] The glass composition and physical properties of this example are shown in Table 1.

[0095] Preparation method: melting temperature is 1370°C, melting time is 20h; mechanical stirring (40r / min, 14h), molding temperature is 1070°C, molding time is 25min, and other preparation steps and parameters are the same as those in Example 1.

[0096] Example 5

[0097] The glass composition and physical properties of this example are shown in Table 1.

[0098] Preparation method: melting temperature is 1410°C, melting time is 25h; mechanical stirring (20r / min, 14h), molding temperature is 1120°C, molding time is 25min, and other preparation steps and parameters are the same as those in Example 1.

[0099] Example 6

[0100] The glass composition and physical properties of this example are shown in Table 1.

[0101] Preparation method: melting temperature is 1430°C, melting time is 30h; mechanical stirring (30r / min, 12h), molding temperature is 1150°C, molding time is 25min, and other preparation steps and parameters are the same as those in Example 1.

[0102] Example 7

[0103] The glass composition and physical properties of this example are shown in Table 1.

[0104] Preparation method: melting temperature is 1430°C, melting time is 30h; mechanical stirring (20r / min, 14h), molding temperature is 1150°C, molding time is 25min, and other preparation steps and parameters are the same as those in Example 1.

[0105] Comparative Examples 1-7

[0106] The glass compositions and physical properties of Comparative Examples 1-7 are shown in Table 1.

[0107] The preparation steps and parameters of the glass in Comparative Examples 1-7 are the same as those in Example 1.

[0108] Table 1 Components, contents and physical properties of the environmentally friendly anti-halation photoelectric glass of Examples 1-7 of the present invention

[0109]

[0110]

[0111] Table 2 Components, contents and physical properties of the glasses of Comparative Examples 1-7

[0112]

[0113]

[0114] By reasonably adding corresponding components and controlling the ratio of each component in the raw material, the optical transmittance and haze performance of the glass of Examples 1-7 are better. As can be seen from Table 1, the optical transmittance of the effective area of ​​the low haze and high transmittance environmentally friendly anti-halation photoelectric glass prepared in Examples 1-7 of the present invention is as follows: in the visible light range of 450-780nm, the maximum transmittance is ≥90.1%, and the minimum transmittance is ≥86.8%. The comprehensive performance is better than the glass involved in Comparative Examples 1-7. At the same time, the glass of the present invention also has good acid / moisture resistance stability, and can maintain the stability of the internal structure of the glass for a long time.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-halation photoelectric glass, comprising a light-transmitting effective area and an anti-halation layer, wherein the anti-halation layer is obtained by blackening the glass of the light-transmitting effective area. in, The glass in the light-transmitting effective area is composed of the following components by mass percentage: SiO 2 61-72%, K 2 CO 3 1-4%, Na 2 CO 3 5-10%, Li 2 O 0.3-1%, ZnO 0.5-1%, B 2 O 3 7-15%, Bi 2 O 3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 0.1-2% and SnO 2 0.1-2%.

2. The anti-halation photoelectric glass according to claim 1, It is characterized in that In terms of mass percentage, it contains the following components: SiO 2 62-72%, K 2 CO 3 2-4%, Na 2 CO 3 5-10%, Li 2 O 0.4-1%, ZnO 0.5-1%, B 2 O 3 7-14%, Bi 2 O 3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 1-2% and SnO 2 1-2%.

3. The anti-halation photoelectric glass according to claim 1, It is characterized in that In terms of mass percentage, it contains the following components: SiO 2 65-72%, K 2 CO 3 2-4%, Na 2 CO 3 5-10%, Li 2 O 0.4-1%, ZnO 0.5-1%, B 2 O 3 7-14%, Bi 2 O 3 0.1-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 1-2% and SnO 2 1-2%.

4. The anti-halation photoelectric glass according to claim 1, It is characterized in that In terms of mass percentage, it contains the following components: SiO 2 65-72%, K 2 CO 3 2-4%, Na 2 CO 3 5-10%, Li 2 O 0.4-0.6%, ZnO 0.5-1%, B 2 O 3 11-14%, Bi 2 O 3 0.1-0.5%, MgO 0.3-0.4%, CaO 1-4%, NaCl 1-2% and SnO 2 1-2%.

5. The anti-halation photoelectric glass according to claim 1, It is characterized in that In terms of mass percentage, it contains the following components: SiO 2 65-67%, K 2 CO 3 2-4%, Na 2 CO 3 5-10%, Li 2 O 0.5-1%, ZnO 0.5-1%, B 2 O 3 7-11%, Bi 2 O 3 0.5-1.5%, MgO 0.3-0.5%, CaO 1-4%, NaCl 1-2% and SnO 2 1-2%.

6. The anti-halation photoelectric glass according to claim 1, It is characterized in that In terms of mass percentage, it contains the following components: SiO 2 67-71%, K 2 CO 3 2-4%, Na 2 CO 3 5-10%, Li 2 O 0.4-1%, ZnO 0.5-1%, B 2 O 3 7-14%, Bi 2 O 3 0.1-1.5%, MgO 0.4-0.5%, CaO 1-4%, NaCl 1-2% and SnO 2 1-2%.

7. The anti-halation photoelectric glass according to claim 1, It is characterized in that Na 2 CO 3 The content is greater than K 2 CO 3 The content.

8. The anti-halation photoelectric glass according to claim 1, It is characterized in that K 2 CO 3 and Na 2 CO 3 The content ratio is not higher than 0.

5.

9. The anti-halation photoelectric glass according to claim 1, It is characterized in that The content of ZnO is less than one-fifth of that of B 2 O 3 The content.

10. The anti-halation photoelectric glass according to claim 1, It is characterized in that ZnO and B 2 O 3 The content ratio is not less than 0.

04.

11. The anti-halation photoelectric glass according to claim 1, It is characterized in that ZnO and B 2 O 3 The content ratio is 0.04-0.

15.

12. The anti-halation photoelectric glass according to claim 1, It is characterized in that The content of CaO is greater than that of MgO, and the content ratio of MgO to CaO is less than 0.

5.

13. The anti-halation photoelectric glass according to claim 1, It is characterized in that The blackening treatment is carried out in a reducing atmosphere at a temperature of 500-650° C., a pressure of 0.01-0.5 MPa, and a time of 4000-16000 min.

14. The anti-halation photoelectric glass according to any one of claims 1 to 13, It is characterized in that When the thickness of the anti-halation photoelectric glass is 20 mm, the haze of its effective light transmission area is less than 0.20%, and the optical transmittance of its effective light transmission area within the wavelength range of 450 nm-780 nm is greater than 86.8%.

15. The anti-halation photoelectric glass according to any one of claims 1 to 13, It is characterized in that When the anti-halation photoelectric glass has a thickness of 20 mm, the haze of its effective light transmission area is less than 0.20%, the maximum optical transmittance of its effective light transmission area within the wavelength range of 450 nm-780 nm is greater than 90.1%, and the minimum optical transmittance is greater than 86.8%.

16. The anti-halation photoelectric glass according to any one of claims 1 to 13, It is characterized in that When the thickness of the anti-halation photoelectric glass is 20 mm, the haze of its effective light transmission area is 0.10-0.19%, the maximum optical transmittance of its effective light transmission area within the wavelength range of 450 nm-780 nm is 90.1-91.8%, and the minimum optical transmittance is 86.8-91%.

17. A method for preparing the anti-halation photoelectric glass according to any one of claims 1 to 16, wherein include: The raw materials are mixed, the mixture is melted at 1350-1450°C, stirred, clarified, and formed at 1050-1150°C to obtain an anti-halation photoelectric glass blank, the blank is annealed at 500-620°C, and then cold-processed; After cold working, blackening treatment is performed to form an anti-halation layer on the glass surface; The glass having an anti-halation layer on the surface is surface treated to obtain the product.

18. The method according to claim 17, It is characterized in that The method comprises: mixing raw materials, melting the mixture at 1350-1450° C., stirring, clarifying, and molding at 1050-1150° C. to obtain an anti-halation photoelectric glass blank, annealing the blank at 500-620° C., and then performing rounding, rolling, slicing, and stepping processes to obtain a step-type glass; The step-shaped glass is subjected to blackening treatment to form an anti-halation layer on its surface; The upper and lower surfaces of the step-shaped glass having an anti-halation layer on the surface are ground and polished to remove the anti-halation layer.

19. The method according to claim 17 or 18, It is characterized in that The blackening treatment is carried out in a reducing atmosphere, the temperature of the blackening treatment is 500-650° C., the pressure is 0.01-0.5 MPa, and the time is 4000-16000 min.

20. An optical element, which is made of the anti-halation photoelectric glass according to any one of claims 1 to 16, or comprises the anti-halation photoelectric glass according to any one of claims 1 to 16.

21. The optical element according to claim 20, It is characterized in that The optical element is an optical lens or an optical window.

22. Use of the anti-halation photoelectric glass according to any one of claims 1 to 16 or the optical element according to claim 20 or 21 in the optical field or the intelligent technology application field.

23. The use according to claim 22, It is characterized in that The application is that the anti-halation photoelectric glass is used as an optical lens or an optical window.

24. The use according to claim 22, It is characterized in that The application is that the anti-halation photoelectric glass is used to prepare optical lenses for low-light-level night vision devices.

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