System and method for low distortion correction of multi-sided composite rigid image guide

Abstract

This invention relates to a correction system and method for low image aberration in multi-sided composite rigid optical fibers. The correction system for low image aberration in multi-sided composite rigid optical fibers is characterized by comprising a drawing tower, a high-precision lead screw fixed at its uppermost end, an electric micro-rotation device fixed on the lead screw, a fixing rod on one side of the drawing tower, and a base, a dual-channel laser diameter gauge, and a drawing wheel fixed sequentially from top to bottom on the fixing rod. A heating furnace is mounted on the base. This invention achieves rapid correction of axial image aberration in multifilament fibers by engraving corresponding angle marks on the binding clamps at the upper end of the master rod and then adjusting the angle of the master rod by referring to a graphical representation of a rule derived from the combination of numbers and shapes.

Description

Technical Field

[0001] This invention relates to the field of optical fiber technology, and specifically to a correction system and method for low image distortion of polygonal composite rigid imaging optical fibers. Background Technology

[0002] When drawing rigid optical fiber filaments, the fiber may twist at an angle along the axial direction. Existing technology relies on the operator's experience to control the twist, which cannot be adjusted to the acceptable range in a short time. This affects the quality and quantity of qualified optical fiber filaments. Moreover, it requires high operator skills and has a long training period, which is not conducive to quality stability.

[0003] In practical applications, twisted fibers can significantly affect the internal structure of optical fiber panels, thereby impacting the product's shear strength, dark spots, distortion, and other properties. Summary of the Invention

[0004] In view of this, the main objective of the present invention is to provide a correction system and method for low image distortion of multi-sided composite rigid optical fiber. The problem to be solved is to quickly correct the axial image distortion of the multifilament by engraving corresponding angle marks on the binding clamp at the upper end of the master rod and then adjusting the angle of the master rod by referring to the rule diagram summarized by combining numbers and shapes.

[0005] The objective of this invention and the technical problem it solves are achieved by the following technical solution. This invention proposes a correction system for low image distortion of multi-sided composite rigid imaging optical fibers, comprising a drawing tower, a high-precision lead screw fixed at the top of the drawing tower, an electric micro-rotation device fixed on the high-precision lead screw, a fixing rod on one side of the drawing tower, and a base, a dual-channel laser diameter gauge, and a drawing wheel fixed sequentially from top to bottom on the fixing rod, with a heating furnace mounted on the base.

[0006] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0007] Preferably, in the aforementioned low image distortion correction system for polygonal composite rigid imaging optical fibers, the vertical direction of the high-precision lead screw is perpendicular to the ground and parallel to the mounting surface on one side of the drawing tower.

[0008] Preferably, in the aforementioned low image distortion correction system for polygonal composite rigid imaging optical fibers, the optical fiber master rod is connected to an electric micro-rotation device via a binding clamp.

[0009] Preferably, in the aforementioned low image distortion correction system for polygonal composite rigid imaging optical fibers, the outer diameter of the strapping clamp is 40 mm.

[0010] Preferably, in the aforementioned low image distortion correction system for polygonal composite rigid imaging optical fibers, the strapping clamp has angle markings.

[0011] Preferably, in the aforementioned low image distortion correction system for polygonal composite rigid optical fibers, the binding clamp is a clamp marked with a 0.35mm interval, where the 0.35mm interval is a 1° mark.

[0012] Preferably, in the aforementioned low image distortion correction system for polygonal composite rigid optical fiber, the centers of the electric micro-rotation device, optical fiber master rod, heating furnace, base, dual-path laser diameter gauge, and drawing wheel are on the same straight line.

[0013] The objective of this invention and the technical problem it solves can also be achieved using the following technical solutions. This invention proposes a method for correcting low image distortion using polygonal composite rigid imaging optical fibers, comprising the following steps:

[0014] 1) Use binding clamps to bind the mother rod;

[0015] 2) Connect the bundled mother bar from step 1) to the electric micro-rotation device and the high-precision lead screw;

[0016] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed, sending the mother bar into the heating furnace for heating and melting; wait for the material head to fall down by gravity, then guide the fiber into the drawing wheel, and then cool it down for adjustment and drawing;

[0017] 4) By monitoring and reading the numerical change curve of the twisted wire, compare the magnitude of the values ​​in the X and Y directions, and calculate |XY|, determine the adjustment direction and adjustment angle.

[0018] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0019] Preferably, in the aforementioned method for correcting low image distortion of polygonal composite rigid imaging optical fibers, the temperature of the heated material is 880°C-900°C.

[0020] Preferably, in the aforementioned method for correcting low image distortion of polygonal composite rigid imaging optical fibers, the heating time is 10-15 minutes.

[0021] Preferably, in the aforementioned method for correcting low image distortion of polygonal composite rigid imaging optical fibers, the value of |XY| is <0.012 (1°).

[0022] By employing the above technical solutions, the low image aberration correction system and method for polygonal composite rigid imaging optical fibers provided by the present invention have at least the following advantages:

[0023] This invention achieves the purpose of quickly correcting axial distortion of multifilament by engraving corresponding angle lines on the binding clamp at the upper end of the master rod and then adjusting the angle of the master rod by referring to the pattern diagram summarized by combining numbers and shapes.

[0024] This invention transforms the existing experience-based adjustment of fiber axial distortion into a data-driven method that can be easily mastered by personnel. It can reduce the axial angle variation of fibers in the shortest possible time, thereby controlling the angle variation to within the acceptable range before producing qualified fibers, increasing the yield by 5%. Simultaneously, it reduces the need for highly experienced personnel, lowers the difficulty of operation, and shortens training time by 93.33%. It also reduces axial distortion, improves fiber consistency, and ensures that the torsional angle of axial distortion is less than or equal to 1°. Ultimately, it improves product shear by 1%, dark spots by 1.5%, and distortion by 1%.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the low image distortion correction system of the polygonal composite rigid imaging optical fiber according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of a strapping clamp according to an embodiment of the present invention;

[0028] Figure 3 A diagram illustrating the patterns summarized by the combination of numbers and shapes in embodiments of the present invention;

[0029] Among them, 1-high precision lead screw; 2-heating furnace; 3-base; 4-electric micro-rotation device; 5-binding clamp; 6-optical fiber mother rod; 7-dual-channel laser diameter gauge; 8-optical fiber; 9-drawing wheel; 10-fixing rod; 11-drawing tower; 20-angle mark. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with preferred embodiments, details the specific implementation, structure, features, and effects of the polygonal composite rigid imaging optical fiber low image aberration correction system and method proposed according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable manner.

[0031] Unless otherwise specified, all materials or reagents listed below are commercially available.

[0032] like Figure 1 , Figure 2 As shown, some embodiments of the present invention provide a correction system for low image distortion of a multi-sided composite rigid imaging optical fiber, which includes a drawing tower 11. A high-precision lead screw 1 is fixed at the uppermost end of one side of the drawing tower 11. An electric micro-rotation device 4 is fixed on the high-precision lead screw 1. A fixing rod 10 is provided on one side of the drawing tower 11. A base 3, a dual-path laser diameter measuring instrument 7, and a drawing wheel 9 are fixed on the fixing rod 10 from top to bottom. A heating furnace 2 is provided on the base 3.

[0033] In some alternative embodiments, the high-precision lead screw 1 is perpendicular to the ground and parallel to one side of the drawing tower 10 to ensure that the motion trajectory of the electric micro-rotating device 4 is a straight line in the vertical direction.

[0034] In some optional embodiments, the electric micro-rotation device 4 is connected to an optical fiber mother rod 6. The cross-section of the optical fiber mother rod 6 is a regular hexagon with opposite sides measuring 20-39.5 mm. Mechanical adjustment via the electric micro-rotation device 4 offers higher precision than manual adjustment; specifically, the adjustment method involves controlling the electric micro-rotation device 4 by clicking a controller, with each click rotating it by 0.1 degrees.

[0035] In some optional embodiments, the optical fiber master rod 6 is quickly connected to the electric micro-rotating device 4 via a binding clamp 5. The upper end of the binding clamp 5 is equipped with a quick-connect male connector, and the lower end of the electric micro-rotating device 4 is equipped with a quick-connect female connector. During fiber drawing, the master rod needs to move at a constant speed in the vertical direction. This constant speed movement in the vertical direction is achieved by integrating it with the binding clamp, the electric micro-rotating device, and the lead screw into a single unit, which can be considered a motion module.

[0036] In some optional embodiments, the outer diameter of the strapping clamp is 40 mm; the strapping clamp 5 has angle markings 20. Further, the strapping clamp 5 is a clamp marked with 0.35 mm intervals, where each 0.35 mm interval represents a 1° mark. This arrangement is to allow for the identification of the adjusted angle value, the retention of process records, and the ability to trace back to the source of process details.

[0037] In some optional embodiments, the centers of the electric micro-rotating device 4, optical fiber master rod 6, heating furnace 2, base 3, dual-path laser diameter gauge 7, and drawing wheel 9 are all on the same vertical line. This arrangement can maximize the quality of the drawn fiber, such as the accuracy of the fiber diameter and the twist value. If the centers are not on the same vertical line, it will cause control errors and inaccurate readings, affecting the overall quality of the fiber.

[0038] In the above technical solution, according to the drawing logic and operation steps of optical fiber drawing, the optical fiber mother rod 6 and the binding clamp 5 are first connected and fixed, and then connected and fixed together to the electric micro-rotator 4. The screw is controlled to rotate downward, driving the electric micro-rotator 4 and the optical fiber mother rod 6 to move downward. When the lower end of the optical fiber mother rod 6 passes through the upper opening of the heating furnace 2, part of it is in the heating furnace 2. The material head is softened by heat and, under the action of gravity, passes through the lower opening of the heating furnace 2 (the heating furnace has both upper and lower openings) and falls downward. It is manually pulled into the drawing wheel 9 by the dual-path laser diameter measuring instrument 7 to draw the optical fiber.

[0039] Some embodiments of the present invention also provide a method for correcting low image distortion of polygonal composite rigid imaging optical fibers, comprising the following steps:

[0040] 1) Use binding clamps to bind the mother rod with an opposite side length of 20–39.5 mm; if the mother rod is smaller than 20 mm or larger than 39.5 mm, it will result in an insecure binding and a safety accident. The binding clamp has an outer diameter of 40 mm and is specifically marked with 0.35 mm intervals, where 0.35 mm intervals represent 1° markings;

[0041] 2) Connect the bundled mother bar from step 1) to the electric micro-rotation device and the high-precision lead screw;

[0042] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed between 0.5 and 12 mm / min. A speed higher than 12 mm / min will result in the master rod not staying in the heating furnace for too short a time, preventing it from melting; a speed lower than 0.5 mm / min will result in the master rod staying in the heating furnace for too long, causing high-temperature crystallization and shortening the lifespan of the drawing furnace. Feed the master rod into the heating furnace and set the furnace temperature to 880℃-900℃ for melting. A temperature lower than 880℃ will prevent the master rod from melting, while a temperature higher than 900℃ will cause high-temperature crystallization, damaging the lifespan of the drawing furnace. Wait 10-15 minutes. Less than 10 minutes will prevent the master rod from melting, and more than 15 minutes will cause... High-temperature crystallization of the master rod damages the lifespan of the drawing furnace. The feed head falls under gravity, guiding fibers with opposite sides of 1.0±0.1mm to the drawing wheel. If the opposite sides are less than 0.9mm or greater than 1.1mm, fibers with the required dimensional accuracy cannot be drawn. The drawing wheel diameter is 120±0.5mm. The drawing temperature is then adjusted to 800±1℃. Temperatures below 799℃ prevent the master rod from melting, while temperatures above 801℃ cause high-temperature crystallization, shortening the furnace's lifespan. The drawing wheel speed should be between 197 and 18528mm / min. Speeds below 197mm / min or above 18528mm / min will prevent the drawing of fibers meeting dimensional requirements.

[0043] 4) Monitor and read the numerical change curve of the twisted wire and the values ​​in the X and Y directions using a dual-path laser diameter measuring instrument, and compare the values ​​in the X and Y directions to determine the adjustment direction; calculate the value of the largest difference in |XY| to determine the adjustment angle; adjust the twisted wire value to the qualified range according to the pattern diagram summarized by combining numbers and shapes, that is, |XY| < 0.012 (1°). Within this range, it means that the axial angle change of the fiber is less than 1°; if it is greater than or equal to 1°, it is impossible to draw fibers within the qualified size range.

[0044] The specific embodiments of the present invention will be described in further detail below with reference to examples, but this should not be construed as a limitation on the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention still fall within the scope of protection of the present invention.

[0045] Unless otherwise specified, all materials and reagents mentioned below are commercially available products well known to those skilled in the art; unless otherwise specified, all methods described are methods known in the art. Unless otherwise defined, the technical or scientific terms used should have the ordinary meaning understood by those skilled in the art to which this invention pertains.

[0046] Comparative Example 1

[0047] This comparative example provides a method for correcting low image distortion in polygonal composite rigid imaging optical fibers, including the following steps:

[0048] 1) Use a 40mm outer diameter binding clamp to bind the female rod with an opposite side of 39.5mm;

[0049] 2) Connect the bundled mother bar to the high-precision lead screw;

[0050] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed of 5 mm / min. Send the mother bar into the heating furnace and set the temperature of the heating furnace to 900℃ for material melting. Wait for 15 minutes. The material head will fall down by gravity, guiding the fiber with an opposite side of 1.0±0.1mm into the drawing wheel. Then, cool down to the drawing temperature of 800℃ and adjust the drawing speed to 7720 mm / min.

[0051] 4) The numerical change curve of the optical fiber filaments was monitored and read using a dual-channel laser diameter gauge. Starting from a feed rate reading of 45mm, the angle of the master rod was manually adjusted repeatedly over a period of 11 minutes. The axial distortion torsion angle of the drawn optical fiber filaments was found to be between 1.5 and 2.5°. At this point, the feed rate reading was 100mm, yielding 547 optical fiber filaments. A total of 100 filaments were produced. Using a reticle and projector, the shear value was found to be 16-17 micrometers, with 96 filaments passing the test, resulting in a shear pass rate of 96%. Using a Lambertian light source and a 10x optical magnifying glass, the dark spot value was found to be 50-60 micrometers, with 50 filaments passing the test, resulting in a dark spot pass rate of 50%. Using a test chart composed of straight lines, diffused light was used to illuminate the filaments vertically and projected onto a screen. The distortion value was found to be 80-90 micrometers, with 96 filaments passing the test, resulting in a distortion pass rate of 96%.

[0052] Example 1

[0053] The difference between this embodiment and Comparative Example 1 is that the adjustment is made by combining the rule diagram summarized by referring to the combination of numbers and shapes with the use of a binding clamp with engraved angle marks to bind the mother rod.

[0054] This embodiment provides a method for correcting low image distortion in polygonal composite rigid imaging optical fibers, including the following steps:

[0055] 1) Use a binding clamp with an outer diameter of 40mm and marked with 0.35mm intervals of 1° to bind the female rod with an opposite side of 39.5mm;

[0056] 2) Connect the bundled mother bar to the electric micro-rotation device and the high-precision lead screw;

[0057] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed of 5 mm / min. Send the mother bar into the heating furnace and set the temperature of the heating furnace to 900℃ for material melting. Wait for 15 minutes. The material head will fall down by gravity, guiding the fiber with an opposite side of 1.0±0.1mm into the drawing wheel. Then, cool down to the drawing temperature of 800℃ and adjust the drawing speed to 7720 mm / min.

[0058] 4) The numerical variation curve of the optical fiber filament was monitored and read using a dual-path laser diameter gauge. The maximum peak value was 1.3 in the X direction and 1.24 in the Y direction. Figure 3The diagram showing the pattern of combining numbers and shapes indicates that X>Y is adjusted clockwise. Calculate |XY|=0.06, and refer to the diagram to determine the adjustment angle is 5°. Starting from a feed rate reading of 45mm, repeat the adjustment multiple times, taking 3 minutes to reach the acceptable level, i.e., |XY|<0.012 (1°), the curve peak is less than 0.012, and the torsion angle of the axial image distortion of the drawn optical fiber filament is between 0 and 0.5°. At this time, the feed rate reading is 60mm, and 587 optical fiber filaments are obtained.

[0059] Compared to Comparative Example 1, the adjustment time in Example 1 was reduced from 11 minutes to 3 minutes, a reduction of 72.72%. The number of optical fiber filaments increased from 547 to 587, resulting in 40 more qualified filaments and a 9% increase in yield. A total of 100 products were produced. Using a reticle and projector, the shear value was found to be no greater than 14 micrometers, with 99 filaments passing the test, resulting in a shear pass rate of 99%, an improvement of 3%. Using a Lambertian light source and a 10x optical magnifying glass, the dark spot value was found to be 35–45 micrometers, with 55 filaments passing the test, resulting in a dark spot pass rate of 55%, an improvement of 5%. Using a test pattern composed of straight lines, illuminated vertically with diffused light and projected onto a screen, the distortion value was found to be 40–50 micrometers, with 99 filaments passing the test, resulting in a distortion pass rate of 99%, an improvement of 3%.

[0060] Example 2

[0061] The difference between this embodiment and Comparative Example 1 is that it does not refer to the pattern diagram summarized by combining numbers and shapes, but uses a binding clamp with angle markings to bind the mother rod for adjustment.

[0062] 1) Use a 40mm outer diameter binding clamp marked with 0.35mm intervals at 1° intervals to bind the female rod with an opposite side of 39.5mm;

[0063] 2) Connect the bundled mother bar to the electric micro-rotation device and the high-precision lead screw;

[0064] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed of 5 mm / min. Send the mother rod into the heating furnace and set the temperature of the heating furnace to 900℃ for material melting. Wait for 15 minutes, and the material head will fall down by gravity. Guide the fiber with an opposite side of 1.0±0.1mm into the drawing wheel, and then cool it down to the drawing temperature of 800℃ for adjustment and drawing. The speed is 7720 mm / min, and about 500 optical fiber filaments are obtained.

[0065] 4) The numerical change curve of the optical fiber filament was monitored and read using a dual-channel laser diameter measuring instrument. Starting from a feed rate of 45mm, the angle of the master rod was adjusted. Since the adjustment direction and angle were unknown, the adjustment direction and angle were randomly selected, resulting in a higher peak value of the curve and increased overall fluctuation. It took 7 minutes to adjust to the qualified value, i.e., |XY|<0.012 (1°), the peak value of the curve was less than 0.012, and the torsional angle of the axial image distortion of the drawn optical fiber filament was between 0.5 and 1°. At this time, the feed rate was 80mm, and 575 optical fiber filaments were obtained.

[0066] Compared to Comparative Example 1, the adjustment time in Example 2 was reduced from 11 minutes to 7 minutes, a reduction of 36.36%. The number of optical fiber filaments increased from 547 to 575, resulting in 28 more qualified filaments and a 5% increase in yield. A total of 100 products were produced. Using a reticle and projector, the shear value was found to be 16–16.5 micrometers, with 97 filaments passing the test, resulting in a shear pass rate of 97%, an improvement of 1%. Using a Lambertian light source and a 10x optical magnifying glass, the dark spot value was found to be 50–55 micrometers, with 51 filaments passing the test, resulting in a dark spot pass rate of 51%, an improvement of 1%. Using a test pattern composed of straight lines, illuminated vertically with diffused light and projected onto a screen, the distortion value was found to be 80–85 micrometers, with 97 filaments passing the test, resulting in a distortion pass rate of 97%, an improvement of 1%.

[0067] Example 3

[0068] The difference between this embodiment and Comparative Example 1 is that a binding clamp without angle markings is used to bind the mother rod, but adjustments are made using a diagram summarizing the rules by referring to the combination of numbers and shapes.

[0069] 1) Use a 40mm outer diameter binding clamp to bind the female rod with an opposite side of 39.5mm;

[0070] 2) Connect the bundled mother bar to the electric micro-rotation device and the high-precision lead screw;

[0071] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed of 5 mm / min. Send the mother rod into the heating furnace and set the temperature of the heating furnace to 900℃ for material melting. Wait for 15 minutes, and the material head will fall down by gravity. Guide the fiber with an opposite side of 1.0±0.1mm into the drawing wheel, and then cool it down to the drawing temperature of 800℃ for adjustment and drawing. The speed is 7720 mm / min, and about 500 optical fiber filaments are obtained.

[0072] 4) The numerical change curve of the optical fiber filament is monitored and read using a dual-path laser diameter gauge. The maximum peak value is 1.3 in the X direction and 1.24 in the Y direction. Referring to the pattern diagram summarized by combining numerical and graphical methods, it is determined that X>Y indicates a clockwise adjustment; |XY|=0.06 is calculated, referring to... Figure 3 The diagram showing the pattern of combining numbers and shapes indicates that the adjustment angle is 5°. Starting from a feed rate reading of 45mm, the adjustment was repeated multiple times, and it took 5 minutes to adjust to the qualified state, i.e., |XY|<0.012(1°), the peak value of the curve is less than 0.012, and the torsional angle of the axial image distortion of the drawn optical fiber filament is between 0.4 and 0.8°. At this time, the feed rate reading is 70mm, and 583 optical fiber filaments are obtained.

[0073] Compared to Comparative Example 1, the adjustment time in Example 3 was reduced from 11 minutes to 5 minutes, a reduction of 54.54%. The number of optical fiber filaments increased from 547 to 583, resulting in 36 more qualified filaments and a 7% increase in yield. A total of 100 products were produced. Using a reticle and projector, the shear value was found to be 15–16 micrometers, with 98 filaments passing the test, resulting in a shear pass rate of 98%, an improvement of 2%. Using a Lambertian light source and a 10x optical magnifying glass, the dark spot value was found to be 45–50 micrometers, with 53 filaments passing the test, resulting in a dark spot pass rate of 53%, an improvement of 3%. Using a test pattern composed of straight lines, illuminated vertically with diffused light and projected onto a screen, the distortion value was found to be 65–75 micrometers, with 98 filaments passing the test, resulting in a distortion pass rate of 98%, an improvement of 2%.

[0074] Example 4

[0075] The difference between this embodiment and Comparative Example 1 is that it combines the rule diagram summarized by referring to the combination of numbers and shapes with the use of a binding clamp with engraved angle marks to bind the mother rod, but does not read the numerical change curve of the optical fiber filament, but directly judges and reads the maximum value in the XY direction and makes adjustments.

[0076] This embodiment provides a method for correcting low image distortion in polygonal composite rigid imaging optical fibers, including the following steps:

[0077] 1) Use a 40mm outer diameter binding clamp marked with 0.35mm intervals at 1° intervals to bind the female rod with an opposite side of 39.5mm;

[0078] 2) Connect the bundled mother bar to the electric micro-rotation device and the high-precision lead screw;

[0079] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed of 5 mm / min. Send the mother bar into the heating furnace and set the temperature of the heating furnace to 900℃ for material melting. Wait for 15 minutes. The material head will fall down by gravity, guiding the fiber with an opposite side of 1.0±0.1mm into the drawing wheel. Then, cool down to the drawing temperature of 800℃ and adjust the drawing speed to 7720 mm / min.

[0080] 4) The maximum value read directly in the X direction is 1.3, and the maximum value read in the Y direction is 1.24. (Refer to...) Figure 3 The diagram illustrating the pattern summarized by combining numbers and shapes shows that X > Y indicates a clockwise adjustment; calculate...

[0081] |XY|=0.06. Referring to the pattern diagram summarized by combining numbers and shapes, it is determined that the adjustment angle is 5°. Starting from the feed reading of 45mm, the adjustment is repeated multiple times. It takes 7 minutes to adjust to the qualified state, that is, |XY|<0.012(1°), the peak value of the curve is less than 0.012, and the torsion angle of the axial image distortion of the drawn optical fiber filament is between 0.4 and 0.8°. At this time, the feed reading is 70mm, and 575 optical fiber filaments are obtained.

[0082] Compared to Comparative Example 1, the adjustment time in Example 4 was reduced from 11 minutes to 7 minutes, a reduction of 36.36%. The number of optical fiber filaments increased from 547 to 575, resulting in 28 more qualified filaments and a 5% increase in yield. A total of 100 products were produced. Using a reticle and projector, the shear value was found to be 15–16 micrometers, with 98 filaments passing the test, resulting in a shear pass rate of 98%, an improvement of 2%. Using a Lambertian light source and a 10x optical magnifying glass, the dark spot value was found to be 45–50 micrometers, with 53 filaments passing the test, resulting in a dark spot pass rate of 53%, an improvement of 3%. Using a test pattern composed of straight lines, illuminated vertically with diffused light and projected onto a screen, the distortion value was found to be 65–75 micrometers, with 98 filaments passing the test, resulting in a distortion pass rate of 98%, an improvement of 2%.

[0083] Example 5

[0084] The difference between this embodiment and Comparative Example 1 is that the rule diagram summarized by referring to the combination of numbers and shapes is combined with the use of a binding clamp with engraved angle marks to bind the mother rod, but the result of |XY| is not calculated and adjustments are made.

[0085] This embodiment provides a method for correcting low image distortion in polygonal composite rigid imaging optical fibers, including the following steps:

[0086] 1) Use a 40mm outer diameter binding clamp marked with 0.35mm intervals at 1° intervals to bind the female rod with an opposite side of 39.5mm;

[0087] 2) Connect the bundled mother bar to the electric micro-rotation device and the high-precision lead screw;

[0088] 3) Open the high-precision lead screw and feed the material downwards at a uniform speed of 5 mm / min. Send the mother bar into the heating furnace and set the temperature of the heating furnace to 900℃ for material melting. Wait for 15 minutes. The material head will fall down by gravity, guiding the fiber with an opposite side of 1.0±0.1mm into the drawing wheel. Then, cool down to the drawing temperature of 800℃ and adjust the drawing speed to 7720 mm / min.

[0089] 4) The numerical variation curve of the optical fiber filament was monitored and read using a dual-path laser diameter gauge. The maximum peak value was 1.3 in the X direction and 1.24 in the Y direction. Figure 3 The diagram showing the pattern of combining numbers and shapes indicates that X>Y is adjusted clockwise. Calculate |XY|=0.06, and refer to the diagram to determine the adjustment angle is 5°. Starting from a feed rate reading of 45mm, repeat the adjustment multiple times, taking 7 minutes to reach the acceptable value, i.e., |XY|<0.012 (1°), the curve peak is less than 0.012, and the torsional angle of the axial image distortion of the drawn optical fiber filament is between 0.4 and 0.8°. At this time, the feed rate reading is 80mm, resulting in 575 optical fiber filaments.

[0090] Compared to Comparative Example 1, the adjustment time in Example 5 was reduced from 11 minutes to 7 minutes, a reduction of 36.36%. The number of optical fiber filaments increased from 547 to 575, resulting in 28 more qualified filaments and a 5% increase in yield. A total of 100 products were produced. Using a reticle and projector, the shear value was found to be 15–16 micrometers, with 98 filaments passing the test, resulting in a shear pass rate of 98%, an improvement of 2%. Using a Lambertian light source and a 10x optical magnifying glass, the dark spot value was found to be 45–50 micrometers, with 53 filaments passing the test, resulting in a dark spot pass rate of 53%, an improvement of 3%. Using a test pattern composed of straight lines, illuminated vertically with diffused light and projected onto a screen, the distortion value was found to be 65–75 micrometers, with 98 filaments passing the test, resulting in a distortion pass rate of 98%, an improvement of 2%.

[0091] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0092] The numerical range described in this invention includes all values ​​within this range, and also includes any range value composed of any two values ​​within this range. Different values ​​of the same indicator appearing in all embodiments of this invention can be arbitrarily combined to form a range value.

[0093] The technical features in the claims and / or specification of this invention can be combined, and the combination is not limited to the combinations obtained through reference in the claims. Technical solutions obtained by combining the technical features in the claims and / or specification are also within the scope of protection of this invention.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A low-image-difference correction system for a polygonal composite rigid imaging optical fiber, characterized in that, The system includes a wire drawing tower, with a high-precision lead screw fixed at its top. An electric micro-rotating device is fixed to the lead screw. A fixing rod is located on one side of the wire drawing tower, and a base, a dual-channel laser diameter gauge, and a wire drawing wheel are sequentially fixed to the fixing rod from top to bottom. A heating furnace is mounted on the base. The high-precision lead screw is vertically perpendicular to the ground and parallel to the mounting surface on one side of the wire drawing tower. An optical fiber master rod is connected to the electric micro-rotating device via a binding clamp. The binding clamp has an outer diameter of 40mm and angle markings. The binding clamp is marked with 0.35mm intervals, which represent 1° markings. The centers of the electric micro-rotating device, optical fiber master rod, heating furnace, base, dual-channel laser diameter gauge, and wire drawing wheel are all on the same straight line.

2. A method for correcting low image aberration in polygonal composite rigid imaging optical fibers, wherein the correction method employs the low image aberration correction system for polygonal composite rigid imaging optical fibers as described in claim 1, characterized in that, Includes the following steps: 1) Use binding clamps to bind the mother rod; 2) Connect the bundled mother bar from step 1) to the electric micro-rotation device and the high-precision lead screw; 3) Open the high-precision lead screw and feed the material downwards at a uniform speed, sending the mother bar into the heating furnace for heating and melting; wait for the material head to fall down by gravity, then guide the fiber into the drawing wheel, and then cool it down for adjustment and drawing; 4) By monitoring and reading the numerical change curve of the twisted wire, compare the magnitudes in the X and Y directions, and calculate |XY|, determine the adjustment direction and angle; The outer diameter of the binding clamp is 40mm; the temperature of the heated material is 880℃-900℃; and the heating time is 10-15min.

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