CN117602831A - Light absorbing material glass for high-definition ultrashort image inverter and preparation method thereof - Google Patents

Abstract

The invention discloses a light absorbing material glass for a high-definition ultrashort image inverter and a preparation method thereof, wherein the light absorbing material glass comprises the following components in percentage by weight: 40-50% of quartz sand, 6-12% of boric acid, 7-15% of aluminum oxide, 1-10% of sodium carbonate, 1-10% of potassium carbonate, 0-2% of lithium carbonate, 0-3% of basic magnesium carbonate, 0-5% of calcium carbonate, 1-3% of barium nitrate, 0-3% of zirconium oxide, 1-3% of copper oxide, 3-6% of potassium permanganate, 0.2-1% of potassium chromate, 1-5% of ferric oxide, 1-6% of cobaltous oxide, 1-6% of nickel oxide, 1-6% of vanadium pentoxide and 0-1% of cerium oxide. The light absorbing material glass is used for preparing the ultra-short image inverter, and can effectively improve the transmittance and resolution of the ultra-short image inverter.

Description

Light-absorbing material glass for high-definition ultra-short image inverter and preparation method thereof

Technical field

The invention relates to the field of manufacturing optical fiber imaging components, and in particular to a light-absorbing material glass used in high-definition ultra-short image inverters and a preparation method thereof.

Background technique

Fiber optic image transmission components are fiber optic components made of millions of optical fibers fused by hot pressure, including fiber optic panels, fiber optic inverters, fiber optic light cones, fiber optic image transmission bundles, etc. They have good air tightness and low distortion. , with few spots and high coupling efficiency, it is an optoelectronic imaging component with excellent performance.

The optical fiber inverter uses a low refractive index leather glass tube and a high refractive index core glass rod. The rod tube is combined with the drawn monofilament for arranging. The absorbing glass is drawn into a wire and inserted into the arranged monofilament. Among them, the absorbent glass is mainly used to absorb stray light, and is then bundled into a composite rod, which is then drawn, plated, hot-melted and pressed to form a rough plate section, and then rotated 180° at high temperature to prepare it. The fiber optic inverter is a key core component and is mainly used in the image intensifier of microscopic night vision devices to achieve optical inversion. The application of fiber optic inverter effectively shortens the size of the image intensifier, reduces field distortion and virtual focus defects of the original relay lens inverter system, and improves imaging clarity and resolution. It is the best choice for low-light image intensifiers. One of the core devices.

The optical fiber inverter is made by twisting the optical fiber plate blank 180° at high temperature. The twisted optical fiber structure has changed to varying degrees. Theoretically, only the optical fiber at the axis is not twisted and stretched, and the remaining optical fibers are twisted and stretched into biconical fibers coiled at 180° at different helix angles. This production process causes the resolution of the peripheral area of ordinary inverters to decrease, and in severe cases, the viewing field of view of the image tube is reduced. During the torsion process, as the distance from the fiber to the center of the slab increases, the degree of torsion increases, the degree of lengthening and tapering of the fiber also gradually increases, its numerical aperture gradually decreases, and the optical flux and light grazing angle of the optical fiber decrease accordingly, resulting in Total reflection at the core-sheath interface suffers varying degrees of loss, and the degree of light crosstalk between optical fibers increases. Therefore, the numerical aperture, luminous flux, and contrast of the optical fiber inverter also decrease gradually. In addition, during the thermal torsion process, the black wire in the slab will cause the diffusion of colored ions, which will increase light leakage and even diffuse and penetrate into the fiber core, seriously increasing light absorption. In addition, the stretching of the fibers after being heated and twisted makes the thickness of the cortex thinner, especially in the edge areas, which increases the light leakage and total reflection loss, thus reducing the transmittance and resolution of the inverter. Rate. The requirements for high-definition ultra-short inverters are more stringent, requiring the width of the torsion area to be narrowed while ensuring high-definition imaging of the inverter, which increases the difficulty. The smaller the height, the more difficult it is to develop an inverter, and the more technical difficulties it has. , the twist width of torsion molding becomes narrower and the wire diameter deforms greatly, thereby reducing the resolution, transmittance and other indicators of the inverter.

In order to solve the above problems, light-absorbing glass filaments are inserted into the gaps between the arranged optical fibers to absorb cross-light, light leakage, etc. The key is the problem of light-absorbing glass materials, which not only require high absorption efficiency of light-absorbing materials, but also It is also required that the degree of diffusion during high-temperature torsion is low, that is, the viscosity of the absorbing glass material is large enough to create an excellent high-definition ultra-short inverter. There are currently light-absorbing glass materials used in optical fiber inverters and preparation methods thereof. However, existing light-absorbing glass materials cannot meet the requirements for ultra-short image inverters with higher quality requirements. The existing light-absorbing glass materials are used for Ultra-short inverters that require higher quality cannot meet the high requirements for imaging clarity.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned existing technical problems and provide a light-absorbing material glass that can effectively improve the transmittance and resolution of an ultra-short inverter and a preparation method thereof.

In order to achieve the above objects, the technical solutions adopted by the present invention are:

A composition of light-absorbing glass used for high-definition ultra-short image inverters, including the following components by weight:

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 oxide 1 -5%, cobalt trioxide 1-6%, nickel oxide 1-6%, vanadium pentoxide 1-6%, cerium oxide 0-1%.

The present invention also provides a preferred technical solution, a light-absorbing material glass composition for high-definition ultra-short inverter, including the following components by 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%, zirconium oxide 0.5-3%, copper oxide 1-2.5%, potassium permanganate 3.5-6%, potassium chromate 0.2-1%, iron oxide 1 -3%, cobalt trioxide 1-3%, nickel oxide 1-4%, vanadium pentoxide 1-3.5%, cerium oxide 0.5-1%.

The present invention also provides a more preferred technical solution, a composition of light-absorbing material glass for high-definition ultra-short inverter, including the following components by 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%, zirconium oxide 1.5% , copper oxide 2%, potassium permanganate 4%, potassium chromate 0.6%, iron oxide 3%, cobalt oxide 3%, nickel oxide 3.5%, vanadium pentoxide 3.5%, cerium oxide 0.5%.

The present invention also provides a method for using the composition to prepare light-absorbing glass for high-definition ultra-short image inverters, which includes the following steps:

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

(2) Glass melting: Add one-fifth of the raw material mixture into the crucible and melt it at 1420-1520°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is added and melted for 5-8 hours. After the raw material mixture is melted, it is clarified and stirred at a temperature of 1520-1600°C for 2-3 hours. The molten and clarified glass liquid is discharged at 1460-1480°C and cast into the required glass in a mold. After the glass is cooled and solidified, it is annealed. , that is, the light-absorbing material glass used for high-definition ultra-short image inverter is obtained.

The annealing temperature is 520-550°C, and the holding time is 2-3 hours.

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

The light-absorbing material glass has a spectral transmittance of ≤3% in the wavelength range of 400-700nm at a thickness of 0.40±0.01mm; it will not crystallize when kept at 820°C for 2 hours.

The invention further provides an application of the light-absorbing material glass in an ultra-short image inverter.

Using the light-absorbing material glass of the present invention to prepare an ultra-short image inverter can effectively improve its transmittance and resolution. After statistical calculation, the transmittance of the ultra-short image inverter is >70% and the resolution is >140lp/mm. . The present invention prepares components with lower transmittance, higher absorption efficiency and low high-temperature diffusion by adjusting the formula of light-absorbing material glass, which can further improve the transmittance and resolution of the ultra-short inverter and improve product performance.

In the present invention, quartz sand is the raw material for glass-forming oxide _SiO2 . _SiO2 is a component that plays an important role in the glass skeleton and is also a component that improves chemical resistance. The weight percentage (wt.%) of quartz sand is 40-50. When the quartz sand content is less than 40wt.%, it is difficult to obtain glass with a matching expansion coefficient, and the chemical resistance stability of the glass will be reduced. When the quartz sand content is higher than 50wt.%, the high-temperature viscosity of the glass will increase, causing the glass melting temperature to be too high. High, and at the same time, the probability of glass phase separation increases.

Boric acid is the raw material for forming oxide B ₂ O ₃ in glass. B ₂ O ₃ is also the main component of the glass skeleton. It is also a cosolvent that reduces the viscosity of glass melting. The weight percentage (wt.%) of boric acid is 6-12. The content of boric acid is less than 6wt.%, which cannot play a role in promoting dissolution and will reduce the chemical stability of the glass. The content of boric acid is greater than 12wt.%, which will cause The tendency of glass to phase separate increases.

Alumina is the raw material of the intermediate oxide Al ₂ O ₃ of glass. The weight percentage (wt.%) of alumina is 7-15. When the content of alumina is less than 7wt.%, it will increase the brittleness of the glass; alumina When the content is higher than 15wt.%, it will increase the high-temperature viscosity of the glass, causing the glass melting temperature to be too high, and at the same time, the crystallization performance of the glass will decrease.

Sodium carbonate is the raw material of alkali metal oxide Na ₂ O. Na ₂ O is an oxide outside the glass structure network. The weight percentage (wt.%) of sodium carbonate is 1-10%, and the content of sodium carbonate is greater than 10wt.%. It will increase the thermal expansion coefficient of glass and increase the crystallization tendency of glass.

Potassium carbonate is the main raw material of alkali metal oxide K ₂ O. K ₂ O is an oxide outside the glass structure network. The weight percentage (wt.%) content of potassium carbonate is 1-10, and the content of potassium carbonate is less than 1wt.%. , cannot adjust the viscosity of glass during high-temperature melting. The content of potassium carbonate is greater than 10wt.%, which will increase the thermal expansion coefficient of glass and increase the crystallization tendency of glass.

Lithium carbonate is the raw material of alkali metal oxide Li ₂ O. Li ₂ O is an oxide outside the glass structure network. The weight percentage (wt.%) of lithium carbonate is 0-2. It mainly plays the role of reducing the viscosity of glass melting. The content of lithium carbonate greater than 2wt.% will increase the tendency of glass to crystallize.

Basic magnesium carbonate is the raw material of MgO, the outer body oxide of the glass structure network. The weight percentage (wt.%) of basic magnesium carbonate is 0-3. When the content of basic magnesium carbonate is greater than 3wt.%, the resistance of the glass will be reduced. Chemical stability, increase the thermal expansion coefficient of glass.

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

Barium nitrate is the raw material of BaO, the outer body oxide of the glass structure network. 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, and the content of barium nitrate is greater than 3wt. .%, increasing the crystallization tendency of glass.

Zirconia is the raw material of ZrO ₂ and is used to adjust the density and high temperature viscosity of glass. Appropriate ZrO ₂ is beneficial to the clarification of the glass liquid and the elimination of streaks during the glass melting process. The weight percentage (wt.%) of zirconia is 0-3, and the content of _ZrO2 is greater than 3wt.%, which will increase the thermal expansion coefficient of the glass.

Copper oxide is the raw material for the colorant CuO of light-absorbing glass. It can be combined with Ni ²⁺ , Co ³⁺ , Mn ²⁺ , etc. to form stable coloring in the glass. By utilizing the composite absorption effect, it can ensure the absorption of 400nm-700nm. Stray light in the wavelength range can obtain better light absorption effect, so that the light absorption curve does not have an obvious transmission peak in the visible light region. The weight percentage (wt.%) of copper oxide is 1-3, but the content of copper oxide is greater than 3wt.% will increase the crystallization tendency of glass.

Potassium permanganate is the raw material for the colorant _MnO2 of light-absorbing glass. In the present invention, potassium permanganate is the main light absorber. Mn ions have stable light absorption ability between 400-700nm and can Stable coloring is formed in the glass. The weight percentage (wt.%) of potassium permanganate is 3-6. The content of potassium permanganate is greater than 6wt.%, which will reduce the chemical resistance stability of the glass and increase the crystallization tendency of the glass. .

Potassium chromate is the raw material for the colorant Cr ₂ O ₃ of light-absorbing glass. The weight percentage (wt.%) of potassium chromate is 0.2-1.0. The content of potassium chromate is greater than 1.0wt.%, which will reduce the resistance of the glass. chemical properties and increase the tendency of crystallization.

Iron oxide is the raw material of the colorant Fe ₂ O ₃ of light-absorbing glass. The weight percentage (wt.%) of iron oxide is 1-5. The content of iron oxide is greater than 5wt.%, which will reduce the quality of the glass. Chemical resistance and increased crystallization tendency.

Cobalt trioxide is the raw material for the colorant Co ₂ O ₃ of light-absorbing glass. The weight percentage (wt.%) of cobalt trioxide is 1-6. Co ₂ O ₃ can be combined with other coloring ions in the glass. A stable form is formed in the light-absorbing material, thereby making the coloring of the light-absorbing material more stable. When the content of cobalt trioxide is greater than 6.0wt.%, it will reduce the chemical resistance stability of the glass and increase the crystallization tendency of the glass.

Nickel oxide is the raw material of NiO, the colorant of light-absorbing glass. The weight percentage (wt.%) of nickel oxide is 1-6. Ni ²⁺ has a good absorption effect in the visible light region, and the content of nickel oxide is greater than 6.0wt. % will reduce the chemical resistance stability of the glass and increase the crystallization tendency of the glass.

Vanadium pentoxide is the raw material for the colorant V ₂ O ₅ of light-absorbing glass. The weight percentage (wt.%) of vanadium pentoxide is 1-6. Vanadium pentoxide can solidify manganese ions for coloring, thereby making light absorption Material coloring is more stable. When the content of vanadium pentoxide is greater than 6.0wt.%, it will reduce the chemical resistance stability of the glass and increase the crystallization tendency of the glass.

Cerium oxide is a rare earth oxide, which mainly adjusts the crystallization properties of glass and functions as a glass clarifier. It is the raw material of CeO _2. The weight percentage (wt.%) of cerium oxide is 0-1, and the content of cerium oxide When it is greater than 1wt.%, the crystallization tendency of the glass will be increased.

Compared with the existing technology, the light-absorbing material glass used in high-definition ultra-short image inverters of the present invention and its preparation method have the following beneficial effects:

(1) This preparation method is low-cost and can effectively improve the clarity of ultra-short inverter products;

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

(3) The light-absorbing material glass will not crystallize when kept at 820°C for 2 hours, and has good crystallization resistance, moisture resistance, and chemical stability;

(3) The light-absorbing material glass prepared by the present invention has the advantages of no stones and bubbles inside the glass after being melted, and its thermal properties meet the requirements of the optical fiber imaging element preparation process;

(4) The light-absorbing material glass of the present invention is applied to an ultra-short inverter, which can improve the transmittance and resolution of imaging.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the embodiments of the present invention are described in further detail below, but this is not intended to limit the present invention.

Table 1 shows the chemical composition (wt.%) and properties of light absorbing material glass embodiments

Example 1

Select the raw materials according to the glass composition of Example 1 in Table 1 so that the ingredients meet the chemical composition of the glass in Table 1, and then prepare the light-absorbing material glass according to the following steps:

(1) Add one-fifth of the raw material mixture into the crucible and melt it at 1470°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is added and melted for 7 hours. After the raw material mixture is melted, Clarify and stir for 2 hours at a temperature of 1560°C. Discharge the molten and clarified glass liquid at 1470°C and cast it into the required glass in a mold;

(2) After the glass is cooled and solidified, anneal it at an annealing temperature of 530°C and a holding time of 3 hours to obtain the absorbent glass for high-definition ultra-short image inverters.

The glass sheet (thickness 0.40±0.01mm) made from the raw materials of Example 1 has been tested and has a spectral transmittance of 2.0% in the wavelength range of 400-700nm. It does not crystallize after being kept at 820°C for 2 hours.

Example 2

Select the raw materials according to the glass composition of Example 2 in Table 1, so that the ingredients meet the chemical composition of the glass in Table 1, and then prepare the light-absorbing material glass according to the following steps:

(1) Add one-fifth of the raw material mixture into the crucible and melt it at 1420°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is completely added and melted for 8 hours. After the raw material mixture is melted, Clarify and stir at a temperature of 1600°C for 3 hours. Discharge the molten and clarified glass liquid at 1460°C and cast it into the required glass in a mold;

(2) After the glass is cooled and solidified, anneal it at an annealing temperature of 520°C and a holding time of 3 hours to obtain the absorbent glass for high-definition ultra-short image inverters.

The glass sheet (thickness 0.40±0.01mm) made from the raw materials of Example 2 has been tested and has a spectral transmittance of 2.5% in the wavelength range of 400-700nm. It does not crystallize after being kept at 820°C for 2 hours.

Example 3

Select the raw materials according to the glass composition of Example 3 in Table 1 so that the ingredients meet the chemical composition of the glass in Table 1, and then prepare the light-absorbing material glass according to the following steps:

(1) Add one-fifth of the raw material mixture into the crucible and melt it at 1520°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is added and melted for 5 hours. After the raw material mixture is melted, Clarify and stir for 2 hours at a temperature of 1520°C. Discharge the molten and clarified glass liquid at 1480°C and cast it into the required glass in a mold;

(2) After the glass is cooled and solidified, anneal it at an annealing temperature of 550°C and a holding time of 2 hours to obtain the absorbent glass for high-definition ultra-short image inverters.

The glass sheet (thickness 0.40±0.01mm) made from the raw materials of Example 3 has been tested and has a spectral transmittance of 3.0% in the wavelength range of 400-700nm. It does not crystallize after being kept at 820°C for 2 hours.

Example 4

Select the raw materials according to the glass composition of Example 4 in Table 1 so that the ingredients meet the chemical composition of the glass in Table 1, and then prepare the light-absorbing material glass according to the following steps:

(1) Add one-fifth of the raw material mixture into the crucible and melt it at 1510°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is added and melted for 6 hours. After the raw material mixture is melted, Clarify and stir for 2 hours at a temperature of 1550°C. Discharge the molten and clarified glass liquid at 1460°C and cast it into the required glass in a mold;

(2) After the glass is cooled and solidified, anneal it. The annealing temperature is 530°C and the holding time is 2 hours. The absorbent glass for high-definition ultra-short image inverter can be obtained.

The glass sheet (thickness 0.40±0.01mm) made from the raw materials of Example 4 has been tested and has a spectral transmittance of 2.2% in the wavelength range of 400-700nm. It does not crystallize after being kept at 820°C for 2 hours.

Example 5

Select the raw materials according to the glass composition of Example 5 in Table 1 so that the ingredients meet the chemical composition of the glass in Table 1, and then prepare the light-absorbing material glass according to the following steps:

(1) Add one-fifth of the raw material mixture into the crucible and melt it at 1500°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is added and melted for 8 hours. After the raw material mixture is melted, Clarify and stir for 2 hours at a temperature of 1580°C. Discharge the molten and clarified glass liquid at 1470°C and cast it into the required glass in a mold;

(2) After the glass is cooled and solidified, anneal it at an annealing temperature of 540°C and a holding time of 3 hours to obtain the absorbent glass for high-definition ultra-short image inverters.

The glass sheet (thickness 0.40±0.01mm) made from the raw materials of Example 5 has been tested and has a spectral transmittance of 2.3% in the wavelength range of 400-700nm. It does not crystallize after being kept at 820°C for 2 hours.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (8)

1. A composition of light-absorbing glass used for high-definition ultra-short image inverters, which is characterized in that it includes the following components in weight percent: 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 oxide 1 -5%, cobalt trioxide 1-6%, nickel oxide 1-6%, vanadium pentoxide 1-6%, cerium oxide 0-1%. 2. The composition according to claim 1, characterized in that it includes the following components in weight percentages: 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 oxide 1 -3%, cobalt trioxide 1-3%, nickel oxide 1-4%, vanadium pentoxide 1-3.5%, cerium oxide 0.5-1%. 3. The composition according to claim 2, characterized in that it includes the following components by weight: 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%, zirconium oxide 1.5% , copper oxide 2%, potassium permanganate 4%, potassium chromate 0.6%, iron oxide 3%, cobalt oxide 3%, nickel oxide 3.5%, vanadium pentoxide 3.5%, cerium oxide 0.5%. 4. A method for preparing light-absorbing material glass for high-definition ultra-short image inverters using the composition of any one of claims 1-3, characterized in that it includes the following steps: (1) Raw material preparation: Weigh quartz sand, boric acid, alumina, sodium carbonate, potassium carbonate, lithium carbonate, basic magnesium carbonate, calcium carbonate, barium nitrate, zirconium oxide, copper oxide, and potassium permanganate according to the weight ratio , potassium chromate, ferric oxide, cobalt trioxide, nickel oxide, vanadium pentoxide and cerium oxide, mix evenly to obtain a raw material mixture; (2) Glass melting: Add one-fifth of the raw material mixture into the crucible and melt it at 1420-1520°C. Add one-fifth of the raw material mixture every half hour until the raw material mixture is added and melted for 5-8 hours. After the raw material mixture is melted, it is clarified and stirred at a temperature of 1520-1600°C for 2-3 hours. The molten and clarified glass liquid is discharged at 1460-1480°C and cast into the required glass in a mold. After the glass is cooled and solidified, it is annealed. , that is, the light-absorbing material glass used for high-definition ultra-short image inverter is obtained. 5. The method according to claim 4, characterized in that the annealing temperature is 520-550°C, and the holding time is 2-3 hours. 6. A light-absorbing material glass for high-definition ultra-short image inverter, characterized in that it is prepared according to the method described in claim 4 or 5. 7. The light-absorbing material glass for high-definition ultra-short image inverter according to claim 6, characterized in that the light-absorbing material glass has a thickness of 0.40±0.01mm and a wavelength range of 400-700nm. Spectral transmittance ≤ 3%; no crystallization will occur when kept at 820°C for 2 hours. 8. Application of the light-absorbing material glass according to claim 6 or 7 in an ultra-short image inverter.