CN115353287B - Phi 40mm large-size optical fiber image inverter and surface processing method and application thereof - Google Patents
Phi 40mm large-size optical fiber image inverter and surface processing method and application thereof Download PDFInfo
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- CN115353287B CN115353287B CN202211107285.XA CN202211107285A CN115353287B CN 115353287 B CN115353287 B CN 115353287B CN 202211107285 A CN202211107285 A CN 202211107285A CN 115353287 B CN115353287 B CN 115353287B
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- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
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Abstract
The invention discloses a phi 40mm large-size optical fiber image inverter and a surface processing method and application thereof, wherein the surface processing method comprises the following steps: grinding the phi 40mm large-size optical fiber image inverter by using 7-10 micrometer silicon carbide, and performing ultrasonic purification treatment on the ground phi 40mm large-size optical fiber image inverter by using purified water; and (3) carrying out surface polishing treatment on the large-size optical fiber image inverter with the diameter of 40mm after the purification treatment by using a polishing medium. The surface processing method of the phi 40mm large-size optical fiber image inverter can effectively improve the surface optical uniformity of the phi 40mm large-size optical fiber image inverter, and the polished phi 40mm large-size optical fiber image inverter has the advantages of flat and smooth surface, no pit defect, low scratch rate, excellent polishing effect, smooth surface, easy cleaning, contribution to improving the surface quality, capability of furthest reducing the use of auxiliary materials in various polishing processes, high polishing quality, low production cost and few surface defects.
Description
Technical Field
The invention relates to the field of glass rod surface processing and optical fiber image transmission element manufacturing, in particular to an optical fiber image inverter with a large diameter of 40mm, and a surface processing method and application thereof.
Background
The optical fiber image transmission element comprises an optical fiber panel, an optical fiber image inverter, an optical fiber light cone, an optical fiber image transmission beam and the like, is an excellent photoelectric imaging element, and has the characteristics of simple structure, small volume, light weight, high resolution, large numerical aperture, small interstage coupling loss, clear image transmission, reality, high light transmission efficiency, optical zero thickness in image transmission, capability of improving edge image quality and the like. The optical fiber image transmission element is widely applied to various cathode ray tubes, camera tubes, charge-coupled devices (CCD) coupling, medical instrument display screens and high-definition television imaging and other instruments and equipment needing to transmit images in the fields of military, criminal investigation, night vision, aerospace, medical treatment and the like, is a high-tech tip product in the optoelectronic industry of the century, and along with the development of information technology, an optical fiber image inverter plays an increasingly important role in the field of low-light night vision.
The optical fiber image inverter in which the effective area size is larger than phi 40mm is called a large-size optical fiber image inverter. The large-size optical fiber image inverter has the characteristics of large volume, high resolution, large visual field and the like, is stable in image transmission, is widely applied to aiming in the aspects of machine vision, flight simulators and the like, and can be used for gun aiming of a main battle tank, periscope reconnaissance monitoring, verification image timely acquisition, and low-light night vision systems of large armored vehicles, tanks and large ships. The large-size optical fiber image inverter is a hard optical fiber image transmission device capable of transmitting images, which is prepared by closely stacking, hot melt pressing, forming and twisting thousands of optical fibers with unit fiber diameters smaller than 6 mu m. Each optical fiber in the optical fiber image inverting device has good optical insulativity, so that each optical fiber can independently transmit light and image without being influenced by other optical fibers, and the optical coupling image transmitting device has the characteristics of high resolution, zero distortion, high light transmission efficiency and the like, has the image inverting function, and can obtain large-size, large-field and long-distance observation.
Because the large-size optical fiber image inverter is a key device for manufacturing the large-field micro-light imager, the large-size optical fiber image inverter is mainly used in instruments and equipment such as cathode ray tubes, camera tubes and image intensifiers which need to transmit images, and the imaging field of view is required to be large, so that the large-size optical fiber image inverter can be reused in detection instruments and medical equipment. The key to making large-size optical fiber image inverter is the working procedures of blank melting, torsion forming, cold working and the like. The cold processing is the last procedure of manufacturing the large-size optical fiber image inverter, directly influences the quality of the finished product of the optical fiber device, and has extremely high requirements on the manufacturing process of the product. The large-size optical fiber image inverter has the advantages that the large-size optical fiber image inverter has large diameter, large surface area and large volume, the larger the volume of the optical fiber image inverter is in the cold working process, the more difficult the surface working process is, the higher the fine degree of operation is, the more difficult the cold working process is, the larger the probability that the surface of the large-size optical fiber image inverter is corroded and scratched in the surface working process is, the defects such as pits, convex bulges and the like can be generated on the surface of the large-size optical fiber image inverter, and the defects such as pits, convex bulges and the like are increased due to the problems of uneven corrosion resistance and the like of the prepared core-skin material, so that the manufacturing difficulty is high. In order to improve the surface finish degree and the light transmittance of the large-size optical fiber image inverter with the diameter of 40mm, the large-size optical fiber image inverter with the diameter of 40mm is generally subjected to surface polishing treatment, and a common polishing method comprises a chemical polishing method and a mechanical polishing method, wherein the chemical polishing method is used for carrying out chemical corrosion treatment on the surface of a glass rod by utilizing an acid solution or an alkali solution, and has the defects that some effective chemical components on the surface of the glass rod are corroded or ions at a core-skin interface are caused to diffuse, the chemical solution has strong corrosion capability and is harmful to human bodies and the environment, waste liquid cannot be recovered and the waste liquid is difficult to treat; the mechanical polishing method is a method for polishing the surface by using polishing powder, and has the defects of long processing period, low efficiency, high production cost, uneven polishing and the like, and polishing media such as polishing powder and the like remain on the surface of a glass rod in the polishing process, and the polishing media are small in particles and are easy to adhere to the surface of the glass rod so as not to be removed, so that the light transmission quality of a large-size optical fiber image inverter is affected by the entry of impurity particle fragments into the surface, and the internal image transmission quality is further affected.
Disclosure of Invention
The invention provides a surface processing method of a phi 40mm large-size optical fiber image inverter, which aims to solve the problems of low polishing efficiency, poor polishing effect, pit generation on the surface and the like in the traditional phi 40mm large-size optical fiber image inverter polishing method.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a surface processing method of a phi 40mm large-size optical fiber image inverter comprises the following steps:
(1) Grinding the phi 40mm large-size optical fiber image inverter by using 7-10 micrometer silicon carbide, and performing ultrasonic purification treatment on the ground phi 40mm large-size optical fiber image inverter by using purified water;
(2) And (3) carrying out surface polishing treatment on the large-size optical fiber image inverter with the diameter of 40mm after the purification treatment by using a polishing medium.
The polishing medium comprises the following substances in percentage by mass:
the rare earth oxide content is 61-70%;
the content of the lubricant is 5-10%;
the water content is 20-25%;
other substances are 1-5%;
the other substances are selected from at least one of zinc nitrate, sodium carbonate and potassium carbonate.
The rare earth oxide is cerium oxide and lanthanum oxide, the mass ratio of the cerium oxide to the lanthanum oxide is (12-16) to 1, and the granularity of the rare earth oxide is 0.5-3 mu m.
The lubricant is at least one of glycol and sodium dodecyl sulfate, and has the effects of suspending and dispersing a polishing medium, being difficult to precipitate and being stable; and/or the water is tap water or deionized water, preferably deionized water.
The granularity of the rare earth oxide is 1.0-2.0 mu m.
The ultrasonic purification treatment time is 50-80 minutes; the polishing treatment time is 0.5-2.0 hours; the polishing rotating speed of the phi 40mm large-size optical fiber image inverter is 150-300rad/min; the cleanliness of the polishing environment is more than one hundred thousand grades; the grinding and grinding amounts of the upper plane and the lower plane of the phi 40mm large-size optical fiber image inverter are all 0.04mm.
The invention also provides a phi 40mm large-size optical fiber image inverter which is obtained after being processed according to the surface processing method.
The phi 40mm large-size optical fiber image inverter comprises fiber core glass and sheath glass:
the fiber core glass has a refractive index of 1.79-1.82 and consists of the following components in percentage by mole: siO (SiO) 2 20-25％、B 2 O 3 19-27％、CaO 0.5-5％、SrO 1-5％、BaO 15-25％、TiO 2 10-15％、La 2 O 3 5-15％、Gd 2 O 3 7.1-10％、Nb 2 O 5 1-5％；
The cortex glass has a refractive index of 1.48-1.51 and consists of the following components in percentage by mole: siO (SiO) 2 73.0-78.0％，Al 2 O 3 1.0-5.0％，B 2 O 3 1.0-5.0％，Na 2 O 0.1-2.9％，K 2 O 7.1-12.0％，MgO 5.1-10.0％，SrO 0.1-5.0％，ZnO 0.1-1.0％，F 2 1.1-2.5％。
The invention also provides an optical fiber image transmission element which comprises the phi 40mm large-size optical fiber image inverter.
The invention further provides application of the phi 40mm large-size optical fiber image inverter in a low-light-level image intensifier.
Compared with the prior art, the surface processing method of the phi 40mm large-size optical fiber image inverter has the following characteristics:
(1) The method can effectively improve the surface optical uniformity of the phi 40mm large-size optical fiber image inverter, is favorable for improving the surface quality, has few surface defects, and has the advantages of smooth and flat surface of the polished phi 40mm large-size optical fiber image inverter, low roughness, no pit defect, low scratch rate, and capability of considering the corrosion resistance of the core glass material and the surface roughness and scratch performance index of the phi 40mm large-size optical fiber image inverter;
(2) According to the invention, the processing process of the smooth surface of the phi 40mm large-size optical fiber image inverter is obtained through chemical and mechanical forces, a series of chemical reactions are carried out on slurry formed by mixing tiny particles and chemical solution and the surface of the phi 40mm large-size optical fiber image inverter, so that the purposes of excellent polishing effect, high polishing efficiency and no impurity generation after polishing are realized, the surface of the phi 40mm large-size optical fiber image inverter forms a transparent and smooth polished surface, and the surface is smooth and easy to clean;
(3) The invention can furthest reduce the use of auxiliary materials in the polishing process of the phi 40mm large-size optical fiber image inverter, the rare earth oxide can effectively improve the polishing effect, the polishing effect is excellent, the lubricant can prevent the polished surface of the glass rod from being scratched, the scratching rate is reduced, and the addition of other substances is also beneficial to the improvement of the polishing quality and the reduction of the production cost;
(4) The surface processing method disclosed by the invention is low in production cost, low in energy consumption, non-toxic, environment-friendly and capable of well meeting the industrial production requirements.
Drawings
The invention is further described below with reference to the drawings and embodiments.
FIG. 1 is a schematic diagram of the internal structure of an optical fiber of a large-size optical fiber inverter with a diameter of 40mm according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of total reflection of an optical fiber of a large-size optical fiber image inverter with a diameter of 40mm according to an embodiment of the present invention.
Wherein 1 is light absorbing material glass, 2 is fiber core glass, and 3 is skin glass.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below. The invention will now be described in further detail with reference to the drawings and the detailed description, which are not intended to limit the invention thereto.
Referring to fig. 1 and 2, a sheath glass tube and a core glass rod are matched and then drawn into monofilaments, each monofilament comprises an outer sheath glass 3 and an inner core glass 2, the monofilaments are closely arranged into a hexagonal body with a regular hexagon in cross section, light absorbing wires formed by drawing light absorbing material glass 1 are arranged between adjacent monofilaments, the light absorbing wires are inserted into the hexagonal body to form a primary composite rod, and the primary composite rod is drawn into a primary multifilament as shown in fig. 1.
In the present invention, the term "granularity" refers to the size of particles, and when the particles are spheres, the granularity is expressed by the diameter of the spheres, when the particles are cubes, the granularity is expressed by the side length of the cubes, and when the particles are irregularly shaped, the granularity is expressed by the mesh size of a screen that just screens out the particles.
The polishing medium comprises the following substances in percentage by mass:
the rare earth oxide content is 61-70%;
the content of the lubricant is 5-10%;
the water content is 20-25%;
other substances are 1-5%;
wherein, other substances include at least one of zinc nitrate, sodium carbonate and potassium carbonate, these substances can form a layer of membrane layer that cohesion is weak on the surface of glass stick in the short time, under this situation, the homogeneity of chemical action is good, polishing treatment homogeneity and uniformity are good, are favorable to improving polishing effect and saving polishing time. When the composition of the polishing medium is within the above range, the mechanical action and the chemical action reach the equivalent state during the polishing, and in this case, the uniformity of the chemical action is good, so that the surface tension is small, the treatment uniformity is good, and a good glass rod surface polishing effect can be obtained. The polishing rotating speed of the phi 40mm large-size optical fiber image inverter is set according to the polishing time, and the polishing rotating speed of the phi 40mm large-size optical fiber image inverter is 150-300rad/min.
Because the pit depth existing on the surface of the large-size optical fiber image inverter with phi 40mm is generally a few micrometers, the optical fiber image inverter can be completely removed after 2-5 times of polishing, the whole height of the optical fiber image inverter before polishing can be measured, the whole height of the optical fiber image inverter is measured after polishing, and when the grinding amount of the upper plane and the lower plane reaches 0.04mm, the polishing is finished. In order to prevent the large-size optical fiber image inverter with the diameter of 40mm from being polluted in the polishing process, a clean room is selected for carrying out, and the cleanliness of the polishing environment is over one hundred thousand.
The high refractive index fiber core glass material has proper thermal expansion coefficient, and the average linear thermal expansion coefficient is (89+/-4) multiplied by 10 within the range of 30-300 DEG C -7 a/DEG C; has a high refractive index, refractive index n D 1.79 to 1.82; the crystallization resistance is good, and the crystallization temperature is higher than 850 ℃; the water resistance and acid resistance chemical stability are better than those of the II level, and the water resistance and acid resistance chemical stability have the advantages of good transparency to visible light radiation, good chemical stability and the like.
The invention relates to a kind of low refractive index glass, which is made of SiO 2 -Al 2 O 3 -B 2 O 3 -RO-R 2 Composed of O-glass systems and incorporating F 2 As a glass fining agent to eliminate bubbles and reduce the refractive index of the glass, alkali metal oxide RO and alkaline earth metal oxide R are introduced 2 O improves the crystallization resistance and high-temperature viscosity characteristics of the glass, improves the crystallization temperature lower limit of the glass, introduces a certain amount of ZnO to adjust the viscosity of the glass, effectively improves the crystallization performance, and can obtain a cortical glass formula and a manufacturing process which meet the requirement of the field of optical fiber image transmission elements.
The parameters and measuring method and instrument for the core-skin glass for the optical fiber image transmission element are as follows:
(1) Refractive index n D Refractive index of glass [ λ=589.3 nm]；
(2) Average thermal expansion coefficient alpha of 30-300 DEG C 30/300 [10 -7 /℃]；
(3) Crystallization temperature T of glass c (℃)。
Wherein the refractive index n of the glass D A refractive index tester is adopted for measurement; the linear expansion coefficient of 30-300 ℃ is measured by a horizontal type dilatometer, the linear expansion coefficient is expressed as an average linear expansion coefficient, the devitrification resistance temperature of the glass is measured by a procedure method for measuring the liquefaction temperature of the glass by a gradient furnace method specified in ASTM C829-1981.
Herein, all "mole percent" are based on the total molar amount of the final glass composition, and the chemical compositions (mole percent) of the core glass and the skin glass examples are detailed in tables 1 and 2, respectively.
Table 1 chemical composition (mol%) and glass properties of the core glass examples
Table 2 chemical composition (mol.%) and glass properties of the skin glass examples
The following raw materials and raw material requirements for preparing the core glass material for the phi 40mm large-size optical fiber image inverter are as follows:
the raw materials used for the fiber core glass are as follows:
quartz sand (high purity, 150 μm oversize 1% or less, 45 μm undersize 30% or less, fe) 2 O 3 Less than 0.01 wt.%) boric acid or boric anhydride (400 μm oversize 10% or less and 63 μm undersize 10% or less)) Calcium carbonate (analytically pure, average particle size 250 μm), strontium carbonate (analytically pure, purity not less than 99.0%), barium nitrate (analytically pure, purity not less than 99.0%), titanium dioxide (chemically pure), lanthanum trioxide (5N), gadolinium trioxide (5N), niobium pentoxide (5N).
The raw materials used for the cortical glass are as follows:
quartz sand (high purity, 150 μm oversize 1% or less, 45 μm undersize 30% or less, fe) 2 O 3 Less than 1 PPm), aluminum hydroxide or aluminum oxide (analytically pure, average particle size 50 μm), boric acid or boric anhydride (400 μm oversize 10% or less and 63 μm undersize 10% or less), sodium carbonate (industrial soda ash), potassium carbonate or nitrate (analytically pure, purity 99.0%), basic magnesium carbonate (chemically pure, average particle size 50 μm), magnesium fluoride (analytically pure, average particle size 45 μm oversize 1% or less), strontium carbonate (analytically pure, purity 99.0%), zinc oxide (analytically pure).
The core-skin glass used for the phi 40mm large-size optical fiber image inverter has the following properties:
(1) The thermal expansion coefficient is similar, and the thermal performance is well matched; the thermal expansion coefficient of the fiber core glass is (3-10) multiplied by 10 higher than that of the sheath glass -7 Such thermal property matching can greatly improve the flexural, tensile, torsional strength of the optical fiber.
(2) The optical fiber has good compatibility matching of chemical properties, the interface between the core and the sheath of the drawn optical fiber does not generate harmful ion diffusion or chemical reaction, and the prepared optical fiber image transmission element has small number of internal spot defects and the size is smaller than 50 mu m;
(3) The optical fiber image transmission element has good compatibility matching of optical performance, the prepared optical fiber image transmission element has good noise performance of fixed patterns, the transmittance is more than 65% in the wavelength range of 500-600nm, and no obvious multifilament boundary is observed under a 10-time microscope.
(4) The softening point temperature of the fiber core glass is 30-100 ℃ higher than that of the sheath glass, and when the fiber is drawn, the sheath glass can be tightly attached to the fiber core glass; the viscosity of the fiber core glass and the viscosity of the sheath glass are approximately close at the wire drawing temperature, so that the stability of the fiber diameter is facilitated. The two kinds of glass are matched and drawn into optical fiber, and no neutralization reaction and no harmful ion diffusion occur at the interface of the core and the sheath.
The fiber core material glass rod for the phi 40mm large-size optical fiber image inverter uses rare earth oxide to improve the refractive index of glass, and after the refractive index of the fiber image transmission element core material glass is improved, the effective numerical aperture of the glass can be improved, and various performances of an optical fiber panel, the optical fiber image inverter, an optical fiber light cone and the like can be well improved.
The invention is further illustrated by the following examples.
Example 1
Preparing a polishing medium according to the following substances in percentage by mass:
the content of cerium oxide is 60%; the lanthanum oxide content is 5%; ethylene glycol content 10%; the content of deionized water is 20%; sodium carbonate 5%; the particle size of both cerium oxide and lanthanum oxide was 1.5 μm. And uniformly mixing the substances to obtain the polishing medium.
The lubricant provided by the invention has the effects of suspending and dispersing a polishing medium, being difficult to precipitate and being stable;
a surface processing method of a phi 40mm large-size optical fiber image inverter comprises the following steps:
(1) Selecting a room with the cleanliness of more than hundred thousand levels to grind by using 10-micrometer silicon carbide, wherein the grinding amounts of the upper plane and the lower plane of a phi 40mm large-size optical fiber image inverter are 0.04mm, and performing ultrasonic purification treatment on the ground glass rod by using purified water for 1 hour;
(2) The large-size optical fiber image inverter with the diameter of 40mm after the purification treatment is polished for 1 hour by a polishing medium, the rotating speed of the large-size optical fiber image inverter with the diameter of 40mm is 200rad/min, and the surface of the large-size optical fiber image inverter with the diameter of 40mm is observed by a microscope with the magnification of 10 times until no pit defect exists.
The core-skin glass for the phi 40mm large-size optical fiber image inverter is prepared according to the following method:
the preparation method of the fiber core glass comprises the following steps:
first, the raw materials were selected according to the glass composition of example 1 of Table 1, andand requires the oxidation of a valence-changing element in the glass raw material, such as Fe 2 O 3 Strictly controlling the Fe content of the finished glass 2 O 3 The content is less than 150PPm, the ingredients meet the chemical composition of the glass in table 1, then a platinum crucible is used for melting for 6 hours at the temperature of 1550 ℃, the glass is stirred for 2 to 3 times in the glass melting process, so that the glass is melted uniformly, after the glass is melted, the temperature is reduced to 1420 ℃ for clarification for 2 hours, then the molten glass is cast into specified test product requirements, annealing is carried out, the annealing process is carried out for 2 hours at 605 ℃, the temperature is reduced to 100 ℃ for 24 hours, and then the furnace cooling is carried out to room temperature. The test performance is shown in Table 1, (1) refractive index is 1.81; (2) Average linear expansion coefficient of 85X 10 at 30-300 DEG C -7 /℃。
The preparation method of the cortical glass comprises the following steps:
the glass composition of example 1 was selected as in Table 2, and the oxide of the valence element in the glass raw material such as Fe was required 2 O 3 Strictly controlling the Fe content of the finished glass 2 O 3 The content is less than 1PPm, the ingredients meet the chemical composition of the glass in Table 2, then a pure platinum crucible is used for melting for 6 hours at the temperature of 1550 ℃, the glass is stirred for 2 to 3 times in the glass melting process, after the glass is melted uniformly, molten glass is drawn into a glass tube, and then annealing treatment is carried out, wherein the test performance is shown in Table 2, (1) the refractive index is 1.48; (2) Average linear expansion coefficient of 85X 10 at 30-300 DEG C -7 a/DEG C; the crystallization temperature of the glass of (3) was 910 ℃.
Example 2
Preparing a polishing medium according to the following substances in percentage by mass:
the content of cerium oxide was 57%; the lanthanum oxide content was 4%; ethylene glycol content 4%; sodium dodecyl sulfonate content 5%; the content of deionized water is 25%; zinc nitrate 5%; the particle size of cerium oxide was 1 μm and the particle size of lanthanum oxide was 2.0. Mu.m. And uniformly mixing the substances to obtain the polishing medium.
The lubricant provided by the invention has the effects of suspending and dispersing a polishing medium, being difficult to precipitate and being stable;
a surface processing method of a phi 40mm large-size optical fiber image inverter comprises the following steps:
(1) Selecting a room with the cleanliness of more than hundred thousand levels to grind by using 7-micrometer silicon carbide, wherein the grinding amounts of the upper plane and the lower plane of a phi 40mm large-size optical fiber image inverter are 0.04mm, and performing ultrasonic purification treatment on the ground glass rod by using purified water for 50 minutes;
(2) Polishing the cleaned large-size optical fiber image inverter with the diameter of 40mm for 0.5 hour by using a polishing medium, wherein the rotating speed of the large-size optical fiber image inverter with the diameter of 40mm is 300rad/min; the large-size optical fiber image inverter with the diameter of 40mm is suitable for observing the surface by a microscope with the magnification of 10 times without pit defects.
The core-skin glass of the large-size optical fiber image inverter with the diameter of 40mm is prepared according to the following method:
the preparation method of the fiber core glass comprises the following steps:
the actual composition of glass is referred to example 2 of table 1, using the same raw materials and raw material requirements as in example 1 of table 1, and melting at 1500 ℃ for 8 hours, stirring the glass for 2 times in the glass melting process to make the glass melt uniform, cooling to 1400 ℃ for clarifying for 1.5 hours after the glass melt, casting the molten glass into the specified test product requirements, annealing, keeping the annealing process at 600 ℃ for 1.5 hours, cooling to 100 ℃ for 23 hours, and cooling to room temperature with a furnace.
The basic properties of the test samples are shown in Table 1 using the same test conditions as in example 1. (1) a refractive index of 1.81; the average linear expansion coefficient is 91 x 10 < -7 >/DEG C between 30 and 300 ℃.
The preparation method of the cortical glass comprises the following steps:
the actual composition of glass was as shown in Table 2, example 2, using the same raw materials and raw material requirements as in example 1 of Table 2, and using the melting process regime for melting at 1450℃for 10 hours and the same test conditions as in example 1, the basic properties of the test pieces are shown in Table 2. (1) a refractive index of 1.49; (2) Average linear expansion coefficient of 82X 10 at 30-300 DEG C -7 a/DEG C; (3) the crystallization temperature of the glass was 915 ℃.
Example 3
Preparing a polishing medium according to the following substances in percentage by mass:
the content of cerium oxide is 65%; the lanthanum oxide content is 5%; ethylene glycol content 5%; the content of tap water is 22%; zinc nitrate 1%; sodium carbonate 2%; the particle size of cerium oxide was 0.5 and the particle size of lanthanum oxide was 3.0. Mu.m. And uniformly mixing the substances to obtain the polishing medium.
The lubricant provided by the invention has the effects of suspending and dispersing a polishing medium, being difficult to precipitate and being stable;
a surface processing method of a phi 40mm large-size optical fiber image inverter comprises the following steps:
(1) Selecting a room with the cleanliness of more than hundred thousand levels to grind by using 8-micrometer silicon carbide, wherein the grinding amounts of the upper plane and the lower plane of a phi 40mm large-size optical fiber image inverter are 0.04mm, and performing ultrasonic purification treatment on the ground glass rod by using purified water for 80 minutes;
(2) Polishing the cleaned large-size optical fiber image inverter with phi 40mm for 2.0 hours by using a polishing felt and a polishing medium, wherein the rotating speed of the large-size optical fiber image inverter with phi 40mm is 150rad/min; the large-size optical fiber image inverter with the diameter of 40mm is suitable for observing the surface by a microscope with the magnification of 10 times without pit defects.
The core-skin glass for the phi 40mm large-size optical fiber image inverter is prepared according to the following method:
the preparation method of the fiber core glass comprises the following steps:
the actual composition of glass was as described in example 3 of Table 1, using the same raw materials and raw material requirements as in example 1 of Table 1, and melting at 1480deg.C for 10 hours, stirring the glass 3 times during the glass melting process to make the glass melt uniform, cooling to 1380deg.C for 2.5 hours after the glass melt, casting the molten glass to the prescribed test article requirements, annealing, maintaining the annealing at 595 deg.C for 2.5 hours, cooling to 100deg.C for 20 hours, and cooling to room temperature with the furnace
The basic properties of the test samples are shown in Table 1 using the same test conditions as in example 1. (1) a refractive index of 1.80; average linear expansion coefficient of 93X 10 at 30-300 DEG C -7 /℃。
The preparation method of the cortical glass comprises the following steps:
the actual composition of glass was as shown in Table 2, example 3, using the same raw materials and raw material requirements as in example 1 of Table 2, and using a melting process regime of melting at 1500℃for 8 hours and the same test conditions as in example 1, the basic properties of the test pieces are shown in Table 1. (1) a refractive index of 1.50; (2) Average linear expansion coefficient of 86X 10 at 30-300 DEG C -7 a/DEG C; the crystallization temperature of the glass of (3) was 910 ℃.
Example 4
Preparing a polishing medium according to the following substances in percentage by mass:
the content of cerium oxide is 60%; the lanthanum oxide content was 4%; sodium dodecyl sulfonate content is 10%; the content of tap water is 25%; 1% of potassium carbonate; the particle size of cerium oxide was 1.5 μm and the particle size of lanthanum oxide was 2.0. Mu.m. And uniformly mixing the substances to obtain the polishing medium.
The lubricant provided by the invention has the effects of suspending and dispersing a polishing medium, being difficult to precipitate and being stable;
a surface processing method of a phi 40mm large-size optical fiber image inverter comprises the following steps:
(1) Selecting a room with the cleanliness of more than hundred thousand levels to grind by using 9-micrometer silicon carbide, wherein the grinding amounts of the upper plane and the lower plane of a phi 40mm large-size optical fiber image inverter are 0.04mm, and performing ultrasonic purification treatment on the ground glass rod by using purified water for 1 hour;
(2) The large-size optical fiber image inverter with phi 40mm after the purification treatment is polished for 1.5 hours by a polishing medium, and the rotating speed of the large-size optical fiber image inverter with phi 40mm is 250rad/min.
The core-skin glass for the phi 40mm large-size optical fiber image inverter is prepared according to the following method:
the preparation method of the fiber core glass comprises the following steps:
the actual composition of glass is referred to example 4 of Table 1, using the same raw materials and raw material requirements as in example 1 of Table 1, and melting at 1450℃for 5 hours, stirring the glass 2-3 times during the glass melting process to make the glass melt uniform, cooling to 1390℃for clarification 2 hours after the glass melt, casting the molten glass to the prescribed test article requirements, annealing, cooling to 100℃for 24 hours after the annealing process is 610℃for 2 hours, cooling to room temperature with the furnace,
the basic properties of the test samples are shown in Table 1 using the same test conditions as in example 1. (1) a refractive index of 1.82; average linear expansion coefficient of 89X 10 at 30-300 DEG C -7 /℃。
The preparation method of the cortical glass comprises the following steps:
the actual composition of the glass was as described in example 4 of table 2, using the same raw materials and raw material requirements as in example 1 of table 2, and using a melting process regime and test conditions for melting at 1480 ℃ for 7 hours, the basic properties of the test pieces are shown in table 1. (1) a refractive index of 1.51; (2) Average linear expansion coefficient of 88X 10 at 30-300 DEG C -7 a/DEG C; the crystallization temperature of the glass of (3) is 905 ℃.
Example 5
Preparing a polishing medium according to the mass percent of the substance of example 1;
a surface processing method of a phi 40mm large-size optical fiber image inverter is as in example 1;
the core-skin glass for the phi 40mm large-size optical fiber image inverter is prepared according to the following method:
the preparation method of the fiber core glass comprises the following steps:
the actual composition of the glass was as described in example 5 of table 1, using the same raw materials and raw material requirements as in example 1 of table 1, and the same melting process schedule and test conditions were adopted, and the basic properties of the samples are shown in table 1. (1) a refractive index of 1.79; average linear expansion coefficient of 87X 10 at 30-300 DEG C -7 /℃。
The preparation method of the cortical glass comprises the following steps:
the actual composition of the glass was as shown in Table 2, example 5, using the same raw materials and raw material requirements as in example 1 of Table 2, and the same melting process schedule and test conditions were adopted, and the basic properties of the test pieces are shown in Table 1. (1) a refractive index of 1.51; (2) Average linear expansion coefficient of 84X 10 at 30-300 DEG C -7 a/DEG C; the crystallization temperature of the glass of (3) is 905 ℃.
The data obtained by the embodiment can show that the phi 40mm large-size optical fiber image inverter has the advantages of good surface processing quality, high surface polishing quality, low production cost, few surface defects and the like, does not contain the advantages of heavy metal oxide which is seriously harmful to the environment, and can be applied to a large-size micro-optical image intensifier.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The surface processing method of the phi 40mm large-size optical fiber image inverter is characterized by comprising the following steps of:
(1) Grinding the phi 40mm large-size optical fiber image inverter by using 7-10 micrometer silicon carbide, and performing ultrasonic purification treatment on the ground phi 40mm large-size optical fiber image inverter by using purified water;
(2) The large-size optical fiber image inverter with the diameter of phi 40mm after the purification treatment is subjected to surface polishing treatment by using a polishing medium;
the polishing medium comprises the following substances in percentage by mass:
the rare earth oxide content is 61-70%;
the content of the lubricant is 5-10%;
the water content is 20-25%;
other substances are 1-5%;
the other substances are selected from at least one of zinc nitrate, sodium carbonate and potassium carbonate;
the phi 40mm large-size optical fiber image inverter comprises fiber core glass and sheath glass:
the fiber core glass has a refractive index of 1.79-1.82 and is composed of the following components in percentage by mole: siO (SiO) 2 20-25％、B 2 O 3 19-27％、CaO 0.5-5％、SrO 1-5％、BaO 15-25％、TiO 2 10-15％、La 2 O 3 5-15％、Gd 2 O 3 7.1-10％、Nb 2 O 5 1-5％；
The cortex glass has a refractive index of 1.48-1.51 and consists of the following components in percentage by mole: siO (SiO) 2 73.0-78.0％，Al 2 O 3 1.0-5.0％，B 2 O 3 1.0-5.0％，Na 2 O 0.1-2.9％，K 2 O 7.1-12.0％，MgO 5.1-10.0％，SrO 0.1-5.0％，ZnO 0.1-1.0％，F 2 1.1-2.5％。
2. The method for surface processing of a large-size optical fiber inverter with a diameter of phi 40mm according to claim 1, wherein the rare earth oxide is cerium oxide and lanthanum oxide, the mass ratio of cerium oxide to lanthanum oxide is (12-16): 1, and the granularity of the rare earth oxide is 0.5-3 μm.
3. The surface processing method of a phi 40mm large-size optical fiber image inverter according to claim 2, wherein the lubricant is at least one of ethylene glycol and sodium dodecyl sulfonate; and/or the water is tap water or deionized water.
4. The surface processing method of a phi 40mm large-size optical fiber image inverter according to claim 2, wherein the granularity of the rare earth oxide is 1.0-2.0 μm.
5. The surface processing method of a phi 40mm large-size optical fiber image inverter according to any one of claims 1 to 4, wherein the time of the ultrasonic cleaning treatment is 50 to 80 minutes; the polishing treatment time is 0.5-2.0 hours; the polishing rotating speed of the phi 40mm large-size optical fiber image inverter is 150-300rad/min; the cleanliness of the polishing environment is more than one hundred thousand grades; the grinding and grinding amounts of the upper plane and the lower plane of the phi 40mm large-size optical fiber image inverter are all 0.04mm.
6. A phi 40mm large-size optical fiber inverter, characterized by being obtained by being treated by the surface processing method according to any one of claims 1 to 5.
7. An optical fiber image transmission element comprising the Φ40mm large-size optical fiber image inverter according to claim 6.
8. Use of the optical fiber image sensing element of claim 7 in a microimage intensifier.
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| JP2000119034A (en) * | 1998-10-08 | 2000-04-25 | Shinetsu Quartz Prod Co Ltd | Production of quartz glass preform for optical fiber |
| CN113603366A (en) * | 2021-09-14 | 2021-11-05 | 中国建筑材料科学研究总院有限公司 | Medium-expansion optical fiber image transmission element and preparation method thereof |
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| US7037352B2 (en) * | 2000-12-12 | 2006-05-02 | Showa Denko Kabushiki Kaisha | Polishing particle and method for producing polishing particle |
| US20030171078A1 (en) * | 2002-03-06 | 2003-09-11 | Fuji Photo Film Co., Ltd. | Polishing member and method for polishing end faces of optical fibers |
| US20040007690A1 (en) * | 2002-07-12 | 2004-01-15 | Cabot Microelectronics Corp. | Methods for polishing fiber optic connectors |
| CN101533122B (en) * | 2009-04-27 | 2010-08-04 | 中天科技光纤有限公司 | Method for preparing single-film optical fiber for high-strength large-coil long submarine optical cable |
| CN106019472A (en) * | 2016-05-11 | 2016-10-12 | 李爱冰 | Preparation process for glass-fiber light guide rod |
| CN108329842A (en) * | 2018-01-22 | 2018-07-27 | 东旭科技集团有限公司 | Polishing fluid composition and preparation method thereof and glass polishing method |
| US11079554B1 (en) * | 2020-02-26 | 2021-08-03 | The Boeing Company | Process for polishing end face of gigabit plastic optical fiber |
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| CN112661419B (en) * | 2020-12-23 | 2023-09-12 | 云南北方光学科技有限公司 | Separation and recovery method of fiber optic element |
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| JP2000119034A (en) * | 1998-10-08 | 2000-04-25 | Shinetsu Quartz Prod Co Ltd | Production of quartz glass preform for optical fiber |
| CN113603366A (en) * | 2021-09-14 | 2021-11-05 | 中国建筑材料科学研究总院有限公司 | Medium-expansion optical fiber image transmission element and preparation method thereof |
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