Light absorbing frit for high definition ultra short inverter and method of making same

Abstract

The application discloses a kind of light absorption material glass for high-definition ultra-short inverter and preparation method thereof, and the light absorption material glass includes the following weight percentage components: quartz sand 40-50%, boric acid 6-12%, alumina 7-15%, sodium carbonate 1-10%, potassium carbonate 1-10%, lithium carbonate 0-2%, basic magnesium carbonate 0-3%, calcium carbonate 0-5%, barium nitrate 1-3%, zirconium oxide 0-3%, copper oxide 1-3%, potassium permanganate 3-6%, potassium chromate 0.2-1%, diiron trioxide 1-5%, cobalt trioxide 1-6%, nickel oxide 1-6%, vanadium pentoxide 1-6%, cerium oxide 0-1%. The light absorption material glass of the application is used for preparing ultra-short inverter, which can effectively improve the transmittance and resolution of ultra-short inverter.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber image transmission element manufacturing, in particular to a light absorbing material glass for high-definition ultra-short inverter and a preparation method thereof. BACKGROUND

[0002] Optical fiber image transmission element is an optical fiber element formed by hot pressing and fusing of hundreds of millions of optical fibers, including optical fiber panel, optical fiber inverter, optical fiber taper, optical fiber image transmission bundle, etc., having the characteristics of good air tightness, small distortion, few spots, high coupling efficiency, etc., and is an excellent optoelectronic imaging component.

[0003] Optical fiber inverter is prepared by using low refractive index skin material glass tube, high refractive index core material glass rod to draw single filament for plate arrangement, inserting the drawn light absorbing material glass filament into the arranged single filament, bundling the light absorbing material glass into a primary composite rod, drawing, plate arrangement, hot melting and pressing to form a blank plate section, and then high temperature rotating 180°. The optical fiber inverter is a key core component, mainly applied to the image intensifier of a micro night vision instrument to realize optical inversion. The application of the optical fiber inverter effectively shortens the size of the image intensifier, reduces the field distortion and virtual focus defects of the original relay lens inversion system, and improves the imaging clarity and resolution, and is one of the core devices of the low-light image intensifier.

[0004] The optical fiber inverter is formed by high temperature twisting the optical fiber plate blank 180°, and the twisted optical fiber structure changes to different degrees. In theory, only the optical fiber at the center is not twisted and stretched, and the rest of the optical fiber is twisted and stretched into a double cone optical fiber with different spiral angles and coiled 180°. This production process makes the peripheral resolution of the ordinary inverter decrease, and in severe cases, the observation field of view of the image tube is reduced. During the twisting process, as the distance from the fiber to the center of the blank increases, the twisting degree increases, the fiber lengthens and the degree of tapering gradually increases, the numerical aperture gradually decreases, the light flux and light sweep angle of the optical fiber decrease, thereby the core-skin interface total reflection suffers different degrees of loss, and the cross light between the optical fibers increases, so the numerical aperture, light flux and contrast of the optical fiber inverter also decrease. In addition, during the hot twisting process, the black silk in the blank can cause the diffusion of colored ions, increase the light leakage, and even diffuse and penetrate into the core, which seriously increases the light absorption. And the stretching of the fiber after hot twisting makes the skin layer thickness thin, especially the skin layer thickness of the edge region is thinner, which increases the light leakage and the degree of total reflection loss, thereby reducing the transmittance and resolution of the inverter. The high-definition ultra-short inverter requires a narrower twisting width while ensuring high-definition imaging of the inverter, which increases the difficulty, and the smaller the height of the inverter, the more difficult it is to develop, and the more technical difficulties it has. The twisting width is narrowed, the wire diameter is deformed, and the resolution, transmittance and other indicators of the inverter are reduced.

[0005] In order to solve the above problems, the light absorbing glass fiber is inserted into the gap of the arranged optical fiber, thereby playing a role of absorbing stray light and light leakage. The key is the problem of the light absorbing glass material. Not only is the light absorbing material required to have high absorption efficiency, but also is required to have low diffusion degree when twisted at high temperature, that is, the viscosity of the light absorbing glass material is large enough, thereby manufacturing an excellent high-definition ultra-short inverter. At present, there are light absorbing glass and its preparation method for optical fiber inverter, but the existing light absorbing glass material cannot meet the requirements of higher quality ultra-short inverter, and the light absorbing glass of the prior art cannot meet the high imaging clarity requirement for preparing higher quality ultra-short inverter. SUMMARY

[0006] The purpose of the present application is to provide a light absorbing glass and its preparation method which can effectively improve the transmittance and resolution of the ultra-short inverter.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0008] A composition of a light absorbing glass for high-definition ultra-short inverter, comprising the following components in weight percentage:

[0009] Quartz sand 40-50%, boric acid 6-12%, alumina 7-15%, sodium carbonate 1-10%, potassium carbonate 1-10%, lithium carbonate 0-2%, basic magnesium carbonate 0-3%, calcium carbonate 0-5%, barium nitrate 1-3%, zirconium oxide 0-3%, copper oxide 1-3%, potassium permanganate 3-6%, potassium chromate 0.2-1%, iron sesquioxide 1-5%, cobalt sesquioxide 1-6%, nickel oxide 1-6%, vanadium pentoxide 1-6%, and cerium oxide 0-1%.

[0010] The present application also provides a preferred technical scheme, a composition of a light absorbing glass for high-definition ultra-short inverter, comprising the following components in weight percentage:

[0011] Quartz sand 41-50%, boric acid 7-11%, alumina 7.4-15%, sodium carbonate 2-10%, potassium carbonate 2-8%, lithium carbonate 0.5-1.5%, basic magnesium carbonate 0.5-2.5%, calcium carbonate 0.5-5%, barium nitrate 1-2%, zirconium oxide 0.5-3%, copper oxide 1-2.5%, potassium permanganate 3.5-6%, potassium chromate 0.2-1%, iron sesquioxide 1-3%, cobalt sesquioxide 1-3%, nickel oxide 1-4%, vanadium pentoxide 1-3.5%, and cerium oxide 0.5-1%.

[0012] The present application also provides a more preferred technical scheme, a composition of a light absorbing glass for high-definition ultra-short inverter, comprising the following components in weight percentage:

[0013] The composition is as follows: 45% quartz sand, 9% boric acid, 7.4% alumina, 5% sodium carbonate, 5% potassium carbonate, 1% lithium carbonate, 1.5% basic magnesium carbonate, 2.5% calcium carbonate, 2% barium nitrate, 1.5% zirconium oxide, 2% copper oxide, 4% potassium permanganate, 0.6% potassium chromate, 3% ferric oxide, 3% cobalt oxide, 3.5% nickel oxide, 3.5% vanadium pentoxide, and 0.5% cerium oxide.

[0014] The present invention further provides a method for preparing light-absorbing glass for high-definition ultrashort image inverters using the aforementioned composition, comprising the following steps:

[0015] (1) Raw material preparation: Weigh out the following raw materials according to the weight ratio: quartz sand, boric acid, alumina, sodium carbonate, potassium carbonate, lithium carbonate, basic magnesium carbonate, calcium carbonate, barium nitrate, zirconium oxide, copper oxide, potassium permanganate, potassium chromate, ferric oxide, cobalt oxide, nickel oxide, vanadium pentoxide and cerium oxide, mix them evenly to obtain a raw material mixture.

[0016] (2) Glass melting: Add one-fifth of the raw material mixture to the crucible and melt it at 1420-1520℃. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melt for 5-8 hours. After the raw material mixture has melted, clarify and stir at 1520-1600℃ for 2-3 hours. Discharge the molten and clarified glass liquid at 1460-1480℃ and cast it into the required glass in the mold. After the glass cools and solidifies, anneal it to obtain the light-absorbing glass for high-definition ultra-short image inverters.

[0017] The annealing temperature is 520-550℃, and the holding time is 2-3 hours.

[0018] The present invention also provides a light-absorbing glass for a high-definition ultra-short image inverter, which is prepared according to the method described.

[0019] The light-absorbing glass, with a thickness of 0.40±0.01mm, has a spectral transmittance of ≤3% in the wavelength range of 400-700nm; and does not crystallize after being kept at 820℃ for 2 hours.

[0020] The present invention further provides an application of the light-absorbing glass described above in an ultra-short image inverter.

[0021] The ultrashort image inverter prepared using the light-absorbing glass of this invention can effectively improve its transmittance and resolution. Statistical calculations show that the transmittance of the ultrashort image inverter is >70%, and the resolution is >140 lp / mm. This invention further improves the transmittance and resolution of the ultrashort image inverter and enhances product performance by adjusting the formulation of the light-absorbing glass to prepare components with lower transmittance, higher absorption efficiency, and lower high-temperature diffusion.

[0022] In this invention, quartz sand is a raw material for glass-forming oxide SiO2. SiO2 plays an important role in the glass skeleton and also improves chemical resistance. The weight percentage (wt.%) of quartz sand is 40-50%. If the quartz sand content is below 40 wt.%, it is difficult to obtain glass with a matching coefficient of thermal expansion, and it also reduces the chemical stability of the glass; if the quartz sand content is above 50 wt.%, the high-temperature viscosity of the glass increases, resulting in excessively high glass melting temperature, and the probability of glass phase separation also increases.

[0023] Boric acid is a raw material for glass-forming oxide B₂O₃, which is also a major component of the glass framework. It also acts as a flux to reduce the viscosity of molten glass. The weight percentage (wt.%) of boric acid is 6-12%. If the boric acid content is below 6 wt.%, it cannot function as a flux and will reduce the chemical stability of the glass; if the boric acid content is above 12 wt.%, it will increase the tendency for phase separation in the glass.

[0024] Alumina is the raw material for Al2O3, an intermediate oxide in glass. The weight percentage (wt.%) of alumina is 7-15%. When the alumina content is less than 7 wt.%, it will increase the brittleness of the glass. When the alumina content is more than 15 wt.%, it will increase the high-temperature viscosity of the glass, resulting in excessively high glass melting temperature. At the same time, the crystallization performance of the glass will decrease.

[0025] Sodium carbonate is a raw material for alkali metal oxide Na2O, which is an outer oxide of the glass structure network. The weight percentage (wt.%) of sodium carbonate is 1-10%. If the sodium carbonate content is greater than 10 wt.%, it will increase the coefficient of thermal expansion of the glass and increase the tendency of the glass to crystallize.

[0026] Potassium carbonate is the main raw material of alkali metal oxide K2O. K2O is an outer oxide of glass structure network. The weight percentage (wt.%) of potassium carbonate is 1-10. If the potassium carbonate content is less than 1 wt.%, it will not play a role in regulating the viscosity of glass at high temperature melting. If the potassium carbonate content is greater than 10 wt.%, it will increase the coefficient of thermal expansion of glass and increase the tendency of glass to crystallize.

[0027] Lithium carbonate is a raw material for alkali metal oxide Li2O, which is an outer oxide of glass structure network. The weight percentage (wt.%) of lithium carbonate is 0-2%, and it mainly plays the role of reducing the viscosity of glass melting. If the content of lithium carbonate is greater than 2 wt.%, it will increase the tendency of glass to crystallize.

[0028] Basic magnesium carbonate is a raw material for MgO, the outer oxide of glass structural network. The weight percentage (wt.%) of basic magnesium carbonate is 0-3. When the content of basic magnesium carbonate is greater than 3 wt.%, it will reduce the chemical stability of glass and increase the coefficient of thermal expansion of glass.

[0029] Calcium carbonate is a raw material for CaO, the outer oxide of glass structural network. The weight percentage (wt.%) of calcium carbonate is 0-5%. When the content of calcium carbonate is greater than 5 wt.%, it will reduce the chemical stability of glass and increase the coefficient of thermal expansion of glass.

[0030] Barium nitrate is a raw material for the glass structure network exooxide BaO. It can effectively reduce the melting temperature of glass and improve the chemical resistance of glass. The weight percentage (wt.%) of barium nitrate is 1-3. If the barium nitrate content is greater than 3 wt.%, it will increase the tendency of glass to crystallize.

[0031] Zirconia, a raw material for ZrO2, is used to adjust the density and high-temperature viscosity of glass. Appropriate ZrO2 content is beneficial for clarifying the molten glass and eliminating streaks during the glass melting process. The weight percentage (wt.%) of zirconium oxide is 0-3%. A ZrO2 content greater than 3 wt.% will increase the coefficient of thermal expansion of the glass.

[0032] Copper oxide (CuO) is a raw material for CuO, a colorant in light-absorbing glass, and can react with Ni. 2+ Co 3+ Mn 2+ By combining these elements, a stable coloring is formed in the glass. Utilizing the composite absorption effect, it can ensure the absorption of stray light in the wavelength range of 400nm-700nm, achieving a better light absorption effect. This ensures that the light absorption curve does not show obvious transmission peaks in the visible light region. The weight percentage (wt.%) of copper oxide is 1-3, but if the copper oxide content is greater than 3wt.%, it will increase the tendency of the glass to crystallize.

[0033] Potassium permanganate is a raw material for MnO2, a colorant in light-absorbing glass. In this invention, potassium permanganate plays a major role as a light absorber. Mn ions have a stable light absorption capacity between 400-700 nm and can form a stable color in glass. The weight percentage (wt.%) of potassium permanganate is 3-6. If the content of potassium permanganate is greater than 6 wt.%, it will reduce the chemical stability of the glass and increase the tendency of the glass to crystallize.

[0034] Potassium chromate is a raw material for Cr2O3, a colorant in light-absorbing glass. The weight percentage (wt.%) of potassium chromate is 0.2-1.0. If the content of potassium chromate is greater than 1.0 wt.%, it will reduce the chemical resistance of the glass and increase the tendency to crystallize.

[0035] Ferric oxide is the raw material for Fe2O3, a colorant in light-absorbing glass. The weight percentage (wt.%) of ferric oxide is 1-5%. If the content of ferric oxide is greater than 5 wt.%, it will reduce the chemical resistance of the glass and increase the tendency to crystallize.

[0036] Cobalt trioxide (Co2O3) is a raw material for the colorant Co2O3 in light-absorbing glass. The weight percentage (wt.%) of Co2O3 is 1-6%. Co2O3 can combine with other coloring ions to form a stable morphology in the glass, thus making the coloring of the light-absorbing material more stable. When the content of Co2O3 is greater than 6.0 wt.%, it will reduce the chemical stability of the glass and increase the tendency of the glass to crystallize.

[0037] Nickel oxide is a raw material for NiO, a colorant in light-absorbing glass. The weight percentage (wt.%) of nickel oxide is 1-6%. 2+ It has good absorption in the visible light region. However, if the nickel oxide content is greater than 6.0 wt.%, it will reduce the chemical stability of the glass and increase the tendency of the glass to crystallize.

[0038] Vanadium pentoxide is a raw material for V₂O₅, a colorant in light-absorbing glass. The weight percentage (wt.%) of vanadium pentoxide is 1-6%. Vanadium pentoxide can solidify manganese ions for coloring, thus making the coloring of the light-absorbing material more stable. When the vanadium pentoxide content exceeds 6.0 wt.%, it reduces the chemical stability of the glass and increases its tendency to crystallize.

[0039] Cerium oxide is a rare earth oxide that mainly regulates the crystallization properties of glass and acts as a glass clarifying agent. It is a raw material for CeO2. The weight percentage (wt.%) of cerium oxide is 0-1. When the content of cerium oxide is greater than 1 wt.%, it will increase the tendency of glass to crystallize.

[0040] Compared with the prior art, the light-absorbing glass for high-definition ultra-short image reversing devices and its preparation method of the present invention have the following beneficial effects:

[0041] (1) This preparation method has low cost and can effectively improve the clarity of ultra-short image inverter products;

[0042] (2) The light-absorbing glass has a spectral transmittance of ≤3% in the wavelength range of 400-700nm with a thickness of 0.40±0.01mm;

[0043] (3) The light-absorbing glass does not crystallize after being kept at 820℃ for 2 hours, and has good anti-crystallization performance, good moisture resistance and good chemical stability.

[0044] (3) The light-absorbing glass prepared by the present invention has the advantages of no stones or bubbles inside the glass after melting, and its thermal properties meet the requirements of the fiber optic imaging element manufacturing process.

[0045] (4) When the light-absorbing glass of the present invention is applied to an ultra-short image inverter, it can improve the transmittance and resolution of the image. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below, but this is not intended to limit the present invention.

[0047] Table 1 shows the chemical composition (wt.%) and properties of the light-absorbing glass examples.

[0048]

[0049]

[0050] Example 1

[0051] According to the glass composition in Example 1 of Table 1, the raw materials are selected to ensure that the formulation meets the glass chemical composition requirements of Table 1. Then, the light-absorbing glass is prepared according to the following steps:

[0052] (1) Add one-fifth of the raw material mixture to the crucible and melt it at 1470℃. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melt for 7 hours. After the raw material mixture melts, clarify and stir at 1560℃ for 2 hours. Discharge the molten and clarified glass liquid at 1470℃ and cast it into the required glass in the mold.

[0053] (2) After the glass cools and solidifies, it is annealed at a temperature of 530°C and a holding time of 3 hours to obtain the absorber glass for high definition ultra-short image reversal.

[0054] A glass slide (thickness 0.40±0.01mm) made from the raw materials of Example 1 was tested and found to have a spectral transmittance of 2.0% in the wavelength range of 400-700nm, and did not crystallize after being kept at 820°C for 2 hours.

[0055] Example 2

[0056] According to the glass composition in Example 2 of Table 1, the raw materials are selected to ensure that the formulation meets the glass chemical composition requirements of Table 1. Then, the light-absorbing glass is prepared according to the following steps:

[0057] (1) Add one-fifth of the raw material mixture to the crucible and melt it at 1420℃. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melt for 8 hours. After the raw material mixture melts, clarify and stir at 1600℃ for 3 hours. Discharge the molten and clarified glass liquid at 1460℃ and cast it into the required glass in the mold.

[0058] (2) After the glass cools and solidifies, it is annealed at a temperature of 520°C and a holding time of 3 hours to obtain the absorber glass for high definition ultra-short image reversal.

[0059] A glass slide (thickness 0.40±0.01mm) made from the raw materials of Example 2 was tested and found to have a spectral transmittance of 2.5% in the wavelength range of 400-700nm, and did not crystallize after being kept at 820°C for 2 hours.

[0060] Example 3

[0061] According to the glass composition in Example 3 of Table 1, the raw materials are selected to ensure that the formulation meets the glass chemical composition requirements of Table 1. Then, the light-absorbing glass is prepared according to the following steps:

[0062] (1) Add one-fifth of the raw material mixture to the crucible and melt it at 1520℃. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melt for 5 hours. After the raw material mixture melts, clarify and stir at 1520℃ for 2 hours. Discharge the molten and clarified glass liquid at 1480℃ and cast it into the required glass in the mold.

[0063] (2) After the glass cools and solidifies, it is annealed at a temperature of 550°C for 2 hours to obtain absorber glass for high definition ultra-short image reversal.

[0064] A glass slide (thickness 0.40±0.01mm) made from the raw materials of Example 3 was tested and found to have a spectral transmittance of 3.0% in the wavelength range of 400-700nm, and did not crystallize after being kept at 820°C for 2 hours.

[0065] Example 4

[0066] According to the glass composition in Example 4 of Table 1, the raw materials are selected to ensure that the formulation meets the glass chemical composition requirements of Table 1. Then, the light-absorbing glass is prepared according to the following steps:

[0067] (1) Add one-fifth of the raw material mixture to the crucible and melt it at 1510℃. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melt for 6 hours. After the raw material mixture melts, clarify and stir at 1550℃ for 2 hours. Discharge the molten and clarified glass liquid at 1460℃ and cast it into the required glass in the mold.

[0068] (2) After the glass cools and solidifies, it is annealed at a temperature of 530°C and a holding time of 2 hours to obtain the absorber glass for high definition ultra-short image reversal.

[0069] A glass slide (thickness 0.40±0.01mm) made from the raw materials of Example 4 was tested and found to have a spectral transmittance of 2.2% in the wavelength range of 400-700nm, and did not crystallize after being kept at 820°C for 2 hours.

[0070] Example 5

[0071] According to the glass composition in Example 5 of Table 1, the raw materials are selected to ensure that the formulation meets the glass chemical composition requirements of Table 1. Then, the light-absorbing glass is prepared according to the following steps:

[0072] (1) Add one-fifth of the raw material mixture to the crucible and melt it at 1500℃. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melt for 8 hours. After the raw material mixture melts, clarify and stir at 1580℃ for 2 hours. Discharge the molten and clarified glass liquid at 1470℃ and cast it into the required glass in the mold.

[0073] (2) After the glass cools and solidifies, it is annealed at a temperature of 540°C and a holding time of 3 hours to obtain the absorber glass for high definition ultra-short image reversal.

[0074] A glass slide (thickness 0.40±0.01mm) made from the raw materials of Example 5 was tested and found to have a spectral transmittance of 2.3% in the wavelength range of 400-700nm, and did not crystallize after being kept at 820°C for 2 hours.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composition of a light absorbing frit glass for high definition ultra short inverter, characterized by, The components include the following weight percentage: Quartz sand 40-50%, boric acid 6-12%, alumina 7-15%, sodium carbonate 1-10%, potassium carbonate 1-10%, lithium carbonate 0-2%, basic magnesium carbonate 0.5-3%, calcium carbonate 0.5-5%, barium nitrate 1-3%, zirconia 0.5-3%, copper oxide 1-3%, potassium permanganate 3-6%, potassium chromate 0.2-1%, iron sesquioxide 1-5%, cobalt sesquioxide 1-6%, nickel oxide 1-6%, vanadium pentoxide 1-6%, and cerium oxide 0-1%.

2. The composition of claim 1, wherein, The components include the following weight percentage: Quartz sand 41-50%, boric acid 7-11%, alumina 7.4-15%, sodium carbonate 2-10%, potassium carbonate 2-8%, lithium carbonate 0.5-1.5%, basic magnesium carbonate 0.5-2.5%, calcium carbonate 0.5-5%, barium nitrate 1-2%, zirconia 0.5-3%, copper oxide 1-2.5%, potassium permanganate 3.5-6%, potassium chromate 0.2-1%, iron sesquioxide 1-3%, cobalt sesquioxide 1-3%, nickel oxide 1-4%, vanadium pentoxide 1-3.5%, and cerium oxide 0.5-1%.

3. The composition of claim 2, wherein, The components include the following weight percentage: Quartz sand 45%, boric acid 9%, alumina 7.4%, sodium carbonate 5%, potassium carbonate 5%, lithium carbonate 1%, basic magnesium carbonate 1.5%, calcium carbonate 2.5%, barium nitrate 2%, zirconia 1.5%, copper oxide 2%, potassium permanganate 4%, potassium chromate 0.6%, iron sesquioxide 3%, cobalt sesquioxide 3%, nickel oxide 3.5%, vanadium pentoxide 3.5%, and cerium oxide 0.5%.

4. Process for the production of light absorbing frits for high definition ultra short inverter using the composition according to any one of claims 1 to 3, characterized in that, The method includes the following steps: (1) Raw material preparation: quartz sand, boric acid, alumina, sodium carbonate, potassium carbonate, lithium carbonate, basic magnesium carbonate, calcium carbonate, barium nitrate, zirconia, copper oxide, potassium permanganate, potassium chromate, iron sesquioxide, cobalt sesquioxide, nickel oxide, vanadium pentoxide, and cerium oxide are weighed according to the weight ratio, mixed uniformly, and a raw material mixture is obtained; (2) Glass melting: one fifth of the raw material mixture is added to a crucible, melted at 1420-1520℃, one fifth of the raw material mixture is added every half hour, until the raw material mixture is added completely and melted for 5-8 hours, after the raw material mixture is melted, the temperature is adjusted to 1520-1600℃, and the glass liquid is stirred for 2-3 hours, the molten and clarified glass liquid is discharged at 1460-1480℃, and the glass is cast into a mold to form a glass product, the glass is annealed after cooling and solidification, and a light absorbing glass for a high-definition ultra-short inverter is obtained.

5. The method of claim 4, wherein, The annealing temperature is 520-550℃, and the holding time is 2-3 hours.

6. A light absorbing frit glass for high definition, ultra-short, inverter, characterized by, The method is prepared according to claim 4 or 5.

7. The light absorbing frit glass for a high-definition ultra-short inverter according to claim 6, wherein The light absorbing glass has a spectral transmittance of ≤3% in the wavelength range of 400-700nm at a thickness of 0.40±0.01mm; and does not produce crystallization after being kept at 820℃ for 2 hours.

8. Application of the light absorbing glass of claim 6 or 7 to an ultra-short inverter.

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