A fused quartz wire drawing device and adjustment method thereof

Abstract

The present invention provides a fused quartz wire drawing device, comprising a laser, a quartz rod and a drawing module, and further comprising: a lens group, a reflector group, a convergent mirror group and a motor; the light beam emitted by the laser enters the reflector group through the lens group; the light beam is reflected to the convergent mirror group through the reflector group after emitting from the lens group; the light beam is emitted from the reflector group and then is emitted to a preset heating area on the quartz rod through the convergent mirror group; wherein the convergent mirror group comprises a conical reflector; the drawing module is connected to the quartz rod, and is used to draw the quartz rod after the light beam is emitted to the quartz rod; the motor is connected to the conical reflector. The present invention can improve the diameter stability and drawing efficiency of quartz wire drawn by quartz.

Description

Technical Field

[0001] The invention relates to the field of quartz drawing technology, and in particular to a fused quartz wire drawing device and an adjustment method thereof. Background Art

[0002] Precision torsion balance is an important tool for weak force measurement and has important applications in scientific research. For the torsion balance system, the material, length, diameter, quality factor Q value and other parameters of the torsion wire have an important impact on the sensitivity and noise of the entire system. Compared with commonly used materials such as pure tungsten wire, high-purity fused quartz wire has smaller structural damping and shear modulus, which can effectively reduce the thermal noise limit of the torsion balance experiment and improve the sensitivity of the torsion balance experiment. Since the precision torsion balance has extremely high requirements for the mechanical dissipation of the torsion wire, and the load is usually close to the tensile strength of the torsion wire, the current mature optical fiber is difficult to connect with the torsion pendulum with low dissipation and cannot be directly applied to the torsion balance. In order to ensure the purity of the material and facilitate the connection between the torsion wire and the torsion pendulum, it is necessary to heat and melt the middle of the high-purity fused quartz rod with a diameter in the millimeter range, and then draw it into a filament with a diameter of tens of microns. Among them, the use of laser heating of the quartz rod has the advantages of no pollution and precise power control, but the optical path and the mechanical structure of the device have many degrees of freedom for adjustment, so it is a relatively complicated task. If the adjustment is not in place, the molten quartz rod will be deflected, resulting in changes in the heating area; if the heating area of ​​the quartz rod is uneven, the heating degree of each direction of the quartz rod will be inconsistent. These factors will affect the diameter control of the drawn quartz wire and cause uncertain stress distribution inside the quartz wire, which is very unfavorable to the physical properties of the quartz wire. In addition, the temperature required to melt the quartz rod is as high as 2000 ℃, so a good optical path needs to be designed to ensure that the energy is concentrated on the quartz rod, and the stability of the optical power caused by the adjustment accuracy needs to be taken into account. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention provides a fused quartz wire drawing device and a quartz drawing method, which can improve the stability and drawing efficiency of quartz drawing.

[0004] An embodiment of the present invention provides an optical path structure of a fused quartz wire drawing device, including a laser and a quartz rod, and further including: a lens group, a reflector group, and a focusing mirror group;

[0005] The lens group is arranged on the outgoing light beam path of the laser, and the light beam emitted by the laser enters the reflector group through the lens group;

[0006] The reflector group is arranged on the light beam path between the lens group and the reflector group, and the light beam is reflected to the focusing mirror group by the reflector group after emitting from the lens group;

[0007] The converging mirror group is arranged on the light beam path between the reflecting mirror group and the quartz rod. After the light beam is emitted from the reflecting mirror group, it passes through the converging mirror group and is emitted into a preset heating area on the quartz rod; wherein the converging mirror group includes a rotatable conical reflecting mirror.

[0008] Furthermore, the lens group includes a concave-convex lens group and a cylindrical lens, and the concave-convex lens group is located between the laser and the cylindrical lens, and includes a concave lens and a convex lens;

[0009] The light beam is incident on the cylindrical mirror through the concave-convex mirror group, and is incident on the reflecting mirror group through the cylindrical mirror.

[0010] Furthermore, it is characterized in that the spacing between two lenses in the concave-convex mirror group and the distance from the concave-convex mirror group to the laser are determined according to the longitudinal diameter of the preset heating area, and the distance between the concave-convex mirror group and the cylindrical mirror is determined according to the transverse diameter of the preset heating area.

[0011] Furthermore, the reflector group includes a right-angle reflector, and the light beam is incident from the concave-convex mirror group into the right-angle reflector and is reflected by the right-angle reflector to the converging mirror group.

[0012] Preferably, it is characterized in that the reflector assembly further includes a beam adjuster;

[0013] When the concave-convex mirror group and the right-angle reflector are located at different heights, the beam adjuster is installed between the beam paths of the concave-convex mirror group and the right-angle reflector so that the light beam passes through the beam adjuster and is incident from the concave-convex mirror group into the right-angle reflector.

[0014] Further, it is characterized in that the converging mirror group includes a reflecting cone mirror, a conical reflecting mirror and a converging reflecting mirror;

[0015] The light beam is reflected by the right-angle reflector to the top of the conical reflector, and then reflected and diverged to all around by the conical reflector;

[0016] The reflective conical mirror is an annular conical mirror, and the reflective conical mirror is set around the conical reflector. After the light beam diverges from the conical reflector, it passes through the reflective conical mirror and enters the converging reflector.

[0017] The converging reflector is also an annular conical mirror. The quartz rod passes through the center of the converging reflector. After the light beam enters the converging reflector, it is converged onto the quartz rod through the converging reflector.

[0018] Another embodiment of the present invention provides a fused quartz wire drawing device, comprising the optical path structure described in the above-mentioned embodiment of the invention, and further comprising: a lower end fixture, an upper end fixture, a bottom plate and a connecting member;

[0019] The motor is connected to the conical reflector through the base plate;

[0020] The lower end fixture is installed on the bottom plate together with the connecting member, and the lower end fixture is arranged on the connecting member, the right angle reflector is arranged at the bottom of the connecting member, and the lower end fixture is located directly above the right angle reflector;

[0021] The upper fixture is located directly above the lower fixture, and the quartz rod is fixed between the upper fixture and the lower fixture.

[0022] Another embodiment of the present invention provides a method for adjusting the fused quartz wire drawing device as described in the above-mentioned embodiment of the invention, comprising the following steps:

[0023] The motor and the conical reflector are adjusted to be coaxial in the vertical direction, and the reflective conical reflector and the conical reflector are adjusted to be coaxial in the horizontal direction;

[0024] The converging conical mirror and the reflecting conical mirror are adjusted to be coaxial in the vertical direction, and the pitch angle of the converging conical mirror is adjusted so that the center line between the two converging conical mirrors is parallel to the bottom plate;

[0025] Adjust the bottom plate, the converging conical mirror and the upper fixture so that the three are coaxial in the vertical and horizontal directions;

[0026] Controlling the laser to emit an experimental light beam, and adjusting the beam lifter so that the experimental light beam generates a light spot on the quartz rod after being reflected by a plurality of mirror surfaces;

[0027] The specific positions of the concave-convex mirror group and the cylindrical mirror are adjusted so that the transverse diameter and the longitudinal diameter of the light spot are respectively equal to the transverse diameter and the longitudinal diameter of the preset heating area.

[0028] Another embodiment of the present invention provides a method for drawing a fused quartz wire based on the fused quartz wire drawing device described in the above embodiment of the invention, comprising the following steps:

[0029] Starting the laser to emit an experimental light beam, and adjusting the light path so that the experimental light beam generates a light spot on the quartz rod;

[0030] After the optical path adjustment is completed, the motor is started to rotate the conical reflector at a preset speed;

[0031] Starting the laser to emit a heating beam, the heating beam is finally irradiated into a preset heating area on the quartz rod after several mirror reflections to heat the quartz rod;

[0032] The heating temperature of the preset heating area is detected. When the heating temperature reaches the preset drawing temperature, the upper clamp is controlled to move upward, and the converging conical mirror is controlled to move downward until the quartz rod is drawn to the preset length to obtain a quartz wire.

[0033] Furthermore, the heating beam is a 10.6 μm infrared laser.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. By connecting the motor to the conical reflector to rotate the conical reflector, the quartz rod is uniformly heated, which improves the stability of quartz wire drawing;

[0036] 2. Comprehensively design the focal length and distance of lenses, cylindrical mirrors, reflectors and other components to better control the size and shape of the light spot, which is conducive to improving the drawing power of the quartz rod;

[0037] 3. By adjusting part of the optical path of the workbench, the degree of freedom of the optical path is greatly reduced, making the adjustment of the optical path simple and easy to operate; and when adjusting the reflective conical mirror, the converging conical mirror and the upper fixture, the position of the components is monitored by taking photos and processing them, making the quantitative adjustment more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic structural diagram of a fused quartz wire drawing device provided in one embodiment of the present invention.

[0039] Figure 2 A schematic diagram of a preferred structure of a fused quartz wire drawing device provided in one embodiment of the present invention.

[0040] Figure 3 A schematic flow chart of a method for adjusting a fused quartz wire drawing device provided in accordance with another embodiment of the present invention.

[0041] Explanation of the accompanying drawings: 1. Motor; 2. Reflective conical mirror; 3. Lower end fixture; 4. Laser; 5. Converging reflector; 6. Upper end fixture; 7. Quartz rod; 8. Concave and convex mirror group; 9. Cylindrical mirror; 10. Beam adjuster; 11. Right-angle reflector; 12. Base plate; 13. Connector; 14. Conical reflector. DETAILED DESCRIPTION

[0042] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0043] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0044] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0045] Reference Figure 1 , is a schematic diagram of the optical path structure of a fused quartz wire drawing device provided in one embodiment of the present invention, including a laser 4, a quartz rod 7, and also including: a lens group, a reflector group and a focusing mirror group;

[0046] The lens group is arranged on the outgoing light beam path of the laser, and the light beam emitted by the laser 4 enters the reflector group through the lens group;

[0047] The reflector group is arranged on the light beam path between the lens group and the concave-convex mirror group, and the light beam is reflected to the converging mirror group through the reflector group after emitting from the lens group;

[0048] The converging mirror group is arranged on the light beam path between the reflecting mirror group and the quartz rod. After the light beam is emitted from the reflecting mirror group, it is emitted into the preset heating area on the quartz rod 7 through the converging mirror group; wherein the converging mirror group includes a conical reflecting mirror 14.

[0049] The embodiment of the present invention achieves better control of the size and shape of the light spot by comprehensively designing the focal length and distance of components such as lenses, cylindrical mirrors, and reflectors, which is beneficial to improving the drawing power of the quartz rod.

[0050] Furthermore, the lens group includes a concave-convex lens group 8 and a cylindrical lens 9, and the concave-convex lens group is located between the laser and the cylindrical lens, and includes a concave lens and a convex lens;

[0051] The light beam is incident on the cylindrical mirror 9 through the concave-convex mirror group 8, and is incident on the reflecting mirror group through the cylindrical mirror 9.

[0052] Preferably, the spacing between two lenses in the concave-convex mirror group 8 and the distance from the concave-convex mirror group 8 to the laser 4 are determined according to the longitudinal diameter of the preset heating area, and the distance between the concave-convex mirror group 8 and the cylindrical mirror 9 is determined according to the transverse diameter of the preset heating area.

[0053] In a preferred embodiment, referring to Figure 2 , which is a schematic diagram of a preferred structure of a fused quartz wire drawing device provided by an embodiment of the present invention. Figure 2 It can be seen that the lens group includes a concave-convex lens group 8 and a cylindrical lens 9, wherein the concave-convex lens group 8 includes a concave lens and a convex lens. Figure 2 From the beam path shown by the dotted line, it can be seen that after the laser emits the light beam, it passes through the concave-convex mirror group and the cylindrical mirror in turn, and then enters the reflecting mirror group at the back.

[0054] The reason for adding a lens group to the device is that the shape of the light spot reaching the surface of the quartz rod needs to be considered when designing the optical path. Ideally, most of the energy of the light spot falls on the surface of the quartz rod in the horizontal direction, ensuring that the laser power is not wasted in large quantities. At the same time, the light spot can heat a sufficiently large area of ​​the quartz rod in the longitudinal direction to ensure that there is enough raw material during drawing. Therefore, in order to achieve the above purpose, it is necessary to adjust the transverse diameter and longitudinal diameter of the light spot separately: use a concave-convex lens group to control the longitudinal diameter of the light spot to ensure that a larger area of ​​the quartz rod can be melted in the longitudinal direction during heating; add a cylindrical mirror after the lens group to adjust the transverse diameter of the laser spot so that most of the light spot falls on the surface of the quartz rod in the horizontal direction.

[0055] In addition, since the laser output is a fundamental mode Gaussian beam, the position of each lens, reflector and cylindrical mirror, and the distance between the two lenses are calculated according to the spot shape and beam waist diameter formula after the fundamental mode Gaussian beam passes through the lens and the diameter of the quartz rod raw material, ensuring that after being placed according to the calculated position, the laser spot can complete the melting of a large area in the longitudinal direction when it reaches the surface of the quartz rod, and most of the laser energy in the transverse direction falls on the surface of the quartz rod. Since the cylindrical mirror only changes the transverse diameter of the spot, after replacing raw materials of different diameters, it is only necessary to adjust the position of the cylindrical mirror to achieve the melting of the quartz rod.

[0056] Furthermore, the reflector group includes a right-angle reflector 11, and the light beam is incident from the concave-convex mirror group 8 into the right-angle reflector 11, and is reflected by the right-angle reflector 11 to the converging mirror group.

[0057] Preferably, the reflector assembly further includes a beam adjuster 10;

[0058] When the concave-convex mirror group 8 and the right-angle reflector 11 are located at different heights, the beam adjuster 10 is installed between the beam paths of the concave-convex mirror group 8 and the right-angle reflector 11 so that the light beam passes through the beam adjuster 10 and is emitted from the concave-convex mirror group 8 into the right-angle reflector 11.

[0059] In a preferred embodiment, referring to Figure 2 The reflector group includes a beam adjuster 10 and a right-angle reflector 11. The beam adjuster 10 is composed of two reflectors. When the light beam is not at the same height as the right-angle reflector 11 after being emitted from the lens group, the light beam can be reflected twice by the beam adjuster 10 to adjust the height of the light beam.

[0060] After the light beam passes through the beam adjuster 10 to be height-adjusted, the light beam enters the right-angle reflector 11 and is reflected by the right-angle reflector 11 to the focusing mirror assembly.

[0061] Further, the converging mirror group includes a reflecting conical mirror 2, a conical reflecting mirror 14 and a converging reflecting mirror 5;

[0062] The light beam is reflected by the right-angle reflector 11 to the top of the conical reflector 14, and then reflected and diverged to the surroundings by the conical reflector 14;

[0063] The reflecting conical mirror 2 is an annular conical mirror, and the reflecting conical mirror 2 is set around the conical reflector 14. After the light beam is diverged from the conical reflector 14, it passes through the reflecting conical mirror 2 and enters the converging reflector 5;

[0064] The converging reflector 5 is also an annular conical mirror. The quartz rod 7 passes through the center of the converging reflector. After the light beam enters the converging reflector 5 , it is converged onto the quartz rod 7 by the converging reflector 5 .

[0065] In a preferred embodiment, referring to Figure 2 The converging mirror group includes a reflecting cone mirror 2, a conical reflector 14 and a converging reflector 5. After the light beam is reflected by the right-angle reflector 11, it will be reflected to the top of the conical reflector 14, and then the conical reflector 14 will diverge the light beam 360° to all around.

[0066] Then, the two annular conical mirrors, the reflecting conical mirror 2 and the converging reflecting mirror 5, can collect the light beams diverging to the surroundings, and through two mirror reflections, converge the light beams from all directions to the preset heating area of ​​the quartz rod 7, thereby achieving 360° heating of the preset heating area.

[0067] Another embodiment of the present invention provides a fused quartz wire drawing device, comprising the optical path structure described in the above-mentioned embodiment of the invention, and further comprising: a lower end fixture 3, an upper end fixture 6, a bottom plate 12 and a connecting member 13;

[0068] The motor 1 is connected to the conical reflector 14 through the base plate 12;

[0069] The lower end fixture 3 is installed on the bottom plate 12 together with the connecting member 13, and the lower end fixture is arranged on the connecting member 13, the right angle reflector 11 is arranged at the bottom of the connecting member 13, and the lower end fixture is located directly above the right angle reflector 11;

[0070] The upper fixture 6 is located directly above the lower fixture 3 , and the quartz rod 7 is fixed between the upper fixture 6 and the lower fixture 3 .

[0071] In a preferred embodiment, see Figure 2The motor 1 is installed at the bottom of the bottom plate 12 and connected to the conical reflector 14 on the bottom plate 12. This is to rotate the conical reflector 14 through the motor 1, thereby compensating for the uneven stress distribution of the quartz wire caused by the uneven spatial heating of the quartz rod due to the uneven reflectivity, and improving the stability of the quartz wire drawing.

[0072] Meanwhile, the fused quartz wire drawing device provided in the embodiment of the present invention also includes a drawing module for drawing quartz wire. In actual operation, the quartz rod 7 will be fixed between the upper clamp 6 and the lower clamp 3. The bottom plate 12 and the connecting member 13 are used to support the reflectors, the conical mirror, the clamp and the quartz rod 7.

[0073] Furthermore, the beam transmission path of the fused quartz wire drawing device provided in the embodiment of the present invention is:

[0074] The laser emitted by the laser 4 first adjusts the beam waist position and size of the laser through the concave-convex mirror group 8, and then readjusts the lateral diameter of the light spot through the cylindrical mirror 9, and then the laser is lifted to the same horizontal plane as the right-angle reflector 11 through the beam adjuster 10. The laser is reflected by the right-angle reflector 11 to the tip of the conical reflector 14. At this time, the light spot is dispersed in the direction of 360°, and then the direction of the light is changed by the reflective conical mirror 2, and then the light spot is converged to the surface of the quartz rod 7 through the converging reflector 5.

[0075] Another embodiment of the present invention provides a method for adjusting the fused quartz wire drawing device as described in the above-mentioned embodiment of the invention, comprising the following steps:

[0076] The motor 1 and the conical reflector 14 are adjusted to be coaxial in the vertical direction, and the reflective conical mirror 2 and the conical reflector 14 are adjusted to be coaxial in the horizontal direction;

[0077] Adjust the converging reflector 5 and the reflective conical mirror 2 to a coaxial state in the vertical direction, and adjust the pitch angle of the converging reflector 5 so that the center line between the two converging reflectors 5 is parallel to the bottom plate 12;

[0078] Adjust the bottom plate 12, the converging reflector 5 and the upper fixture 6 to be coaxial in the vertical and horizontal directions;

[0079] Control the laser 4 to emit an experimental light beam, and adjust the beam adjuster 10 so that the experimental light beam generates a light spot on the quartz rod 7 after being reflected by a plurality of mirror surfaces;

[0080] The specific positions of the concave-convex mirror group 8 and the cylindrical mirror 9 are adjusted so that the transverse diameter and the longitudinal diameter of the light spot are respectively equal to the transverse diameter and the longitudinal diameter of the preset heating area.

[0081] In a preferred embodiment, the method for adjusting the light path specifically includes:

[0082] 1) First, fix the motor 1 under the image measuring instrument, adjust the motor shaft and the conical reflector 14 to a coaxial state through the image measuring instrument, and fix the two together.

[0083] 2) Under the image measuring instrument, adjust the reflective conical mirror 2 to be coaxial with the conical reflective mirror 14.

[0084] 3) Install the lower end fixture 3 together with the connecting piece 13 on the bottom plate 12 and ensure that it is coaxial with the reflective conical mirror 2.

[0085] 4) Install the workbench (including the base plate 12 and the connecting piece 13) on the designed wire drawing device, gradually adjust the converging reflector 5 to be coaxial with the reflective conical mirror 2, and adjust the pitch so that the converging reflector 5 and the workbench are in a horizontal state.

[0086] 5) Use a camera to photograph the workbench, the converging reflector 5 and the upper fixture 6, and process the photos to find the central axis positions of the two lenses and the upper fixture 6, and gradually adjust the positions of the converging reflector 5 and the upper fixture 6 until the central axes of the three coincide in the photos taken at a fixed position.

[0087] 6) Fix the camera to a vertical position and shoot it there, repeating step 6) to ensure that the three cameras are coaxial in the two vertical shooting directions.

[0088] 7) Repeat steps 5) and 6) until the three are completely coaxial.

[0089] 8) Design the shape of the light spot according to the diameter of the quartz rod, so as to determine the position of the concave-convex lens group 8 and the cylindrical mirror 9. And ensure that the light passes through the axis of the lens and the cylindrical mirror.

[0090] After the optical path adjustment is completed, the laser emitted by the laser 4 passes through the lens group, the spot size is trimmed, and then the lateral diameter is corrected by the cylindrical mirror, and then it is irradiated to the surface of the right-angle reflector 11 through the beam adjuster 10. After being reflected by the reflector, the laser irradiates the tip of the conical reflector 14 and is dispersed in a 360° direction to irradiate the reflecting conical mirror 2. The laser is reflected to the surface of the converging reflector 5 and finally irradiates the surface of the quartz rod to complete the heating.

[0091] Reference Figure 3 , is a flow chart of a method for adjusting a fused quartz wire drawing device provided by another embodiment of the present invention, comprising the following steps:

[0092] S1: Start the laser 4 to emit an experimental light beam, and adjust the light path so that the experimental light beam generates a light spot on the quartz rod 7;

[0093] S2: After the optical path adjustment is completed, the motor 1 is started to rotate the conical reflector 14 at a preset speed;

[0094] S3: starting the laser 4 to emit a heating beam, and the heating beam is finally irradiated into a preset heating area on the quartz rod 7 after several mirror reflections to heat the quartz rod 7;

[0095] S4: Detect the heating temperature of the preset heating area. When the heating temperature reaches the preset drawing temperature, control the upper clamp 6 to move upward and control the converging reflector 5 to move downward until the quartz rod 7 is drawn to the preset length to obtain a quartz wire.

[0096] In a preferred embodiment, the adjustment process of quartz wire drawing is:

[0097] First, install the quartz rod 7 between the upper fixture 6 and the lower fixture 3, and then turn on the laser 4 to emit the experimental beam;

[0098] By adjusting each reflector and conical mirror in the device, the experimental light beam covers a light spot in the preset heating area on the quartz rod 7;

[0099] The motor is started by the control program to rotate the conical reflector at a certain speed, and then the laser 4 is turned on to emit a heating beam;

[0100] After the quartz rod 7 is heated to a molten state, the displacement stage of the quartz wire drawing device is started through a program to drive the upper clamp 6 to move upward. During this process, the converging reflector slowly moves downward to ensure that there is sufficient raw material during the drawing process. After the quartz rod 7 is drawn, a quartz wire is obtained.

[0101] Furthermore, the heating beam is a 10.6 μm infrared laser.

[0102] Since the laser used to heat the raw material during drawing is 10.6 μm infrared light with high energy, in order to ensure the convenience and safety of optical path adjustment, the light path is adjusted with the indicating red light so that it reaches the surface of the quartz rod, and the beam adjuster 10 is gradually adjusted so that the light spot is evenly irradiated on the surface of the quartz rod without jitter.

[0103] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An optical path structure of a fused quartz wire drawing device, comprising a laser (4) and a quartz rod (7), It is characterized in that Also includes: A lens group, a reflector group and a focusing mirror group; The lens group is arranged on the outgoing light beam path of the laser, and the light beam emitted by the laser (4) enters the reflector group through the lens group; The reflector group is arranged on the light beam path between the lens group and the converging mirror group, and the light beam is reflected to the converging mirror group by the reflector group after emitting from the lens group; The converging mirror group is arranged on the light beam path between the reflecting mirror group and the quartz rod, and the light beam is emitted from the reflecting mirror group and then passes through the converging mirror group to be emitted into a preset heating area on the quartz rod (7); wherein the converging mirror group comprises a rotatable conical reflecting mirror (14), and the light beam is incident on the top of the conical reflecting mirror (14) and then diverges to all around.

2. The optical path structure of the fused quartz wire drawing device according to claim 1, It is characterized in that The lens group comprises a concave-convex lens group (8) and a cylindrical mirror (9); the concave-convex lens group is located between the laser and the cylindrical mirror, and comprises a concave lens and a convex lens; The light beam is incident upon the cylindrical mirror (9) through the concave-convex mirror group (8), and is incident upon the reflecting mirror group through the cylindrical mirror (9).

3. The optical path structure of the fused quartz wire drawing device according to claim 2, It is characterized in that The spacing between two lenses in the concave-convex mirror group (8) and the distance from the concave-convex mirror group (8) to the laser (4) are determined according to the longitudinal diameter of the preset heating area, and the distance between the concave-convex mirror group (8) and the cylindrical mirror (9) is determined according to the transverse diameter of the preset heating area.

4. The optical path structure of the fused quartz wire drawing device according to claim 2, It is characterized in that The reflector group comprises a right-angle reflector (11), and the light beam is incident from the concave-convex mirror group (8) into the right-angle reflector (11), and is reflected by the right-angle reflector (11) to the converging mirror group.

5. The optical path structure of the fused quartz wire drawing device according to claim 4, It is characterized in that The reflector assembly further comprises a beam adjuster (10); When the concave-convex mirror group (8) and the right-angle reflector (11) are located at different heights, the beam adjuster (10) is installed between the beam paths of the concave-convex mirror group (8) and the right-angle reflector (11), so that the light beam passes through the beam adjuster (10) and is emitted from the concave-convex mirror group (8) into the right-angle reflector (11).

6. The optical path structure of the fused silica wire drawing device according to claim 4, It is characterized in that The converging mirror group comprises a reflecting conical mirror (2), a conical reflecting mirror (14) and a converging reflecting mirror (5); The light beam is reflected by the right-angle reflector (11) to the top of the conical reflector (14), and then reflected and diverged to all directions by the conical reflector (14); The reflecting conical mirror (2) is an annular conical mirror, and the reflecting conical mirror (2) is mounted around the conical reflecting mirror (14). After the light beam is diverged from the conical reflecting mirror (14), it passes through the reflecting conical mirror (2) and is incident on the converging reflecting mirror (5). The converging reflector (5) is also an annular conical mirror, and the quartz rod (7) passes through the center of the converging reflector. After the light beam enters the converging reflector (5), it is converged onto the quartz rod (7) by the converging reflector (5).

7. A fused silica wire drawing device, comprising the optical path structure according to any one of claims 1 to 6, It is characterized in that Also includes: A motor (1), a lower end fixture (3), an upper end fixture (6), a base plate (12), and a connecting piece (13); The motor (1) is connected to the conical reflector (14) via the base plate (12); The lower end fixture (3) is mounted together with the connecting member (13) on the bottom plate (12), and the lower end fixture is arranged on the connecting member (13), the right-angle reflector (11) is arranged at the bottom of the connecting member (13), and the lower end fixture is located directly above the right-angle reflector (11); The upper clamp (6) is located directly above the lower clamp (3), and the quartz rod (7) is fixed between the upper clamp (6) and the lower clamp (3).

8. A method for adjusting the fused quartz wire drawing device according to claim 7, It is characterized in that The following steps are involved: The motor (1) and the conical reflector (14) are adjusted to be in a coaxial state in the vertical direction, and the reflective conical reflector (2) and the conical reflector (14) are adjusted to be in a coaxial state in the horizontal direction; The converging reflector (5) and the reflective conical mirror (2) are adjusted to a coaxial state in the vertical direction, and at the same time, the pitch angle of the converging reflector (5) is adjusted so that the center line between the two converging reflectors (5) is parallel to the bottom plate (12); The bottom plate (12), the converging reflector (5) and the upper clamp (6) are adjusted so that the three are in a coaxial state in the vertical direction and the horizontal direction; Controlling the laser (4) to emit an experimental light beam, and adjusting the beam adjuster (10) so that the experimental light beam generates a light spot on the quartz rod (7) after being reflected by a plurality of mirror surfaces; The specific positions of the concave-convex mirror group (8) and the cylindrical mirror (9) are adjusted so that the transverse diameter and the longitudinal diameter of the light spot are respectively equal to the transverse diameter and the longitudinal diameter of the preset heating area.

9. A drawing method based on the fused quartz wire drawing device according to claim 7, It is characterized in that The following steps are involved: Starting the laser (4) to emit an experimental light beam, and adjusting the light path so that the experimental light beam generates a light spot on the quartz rod (7); After the optical path adjustment is completed, the motor (1) is started to rotate the conical reflector (14) at a preset speed; Starting the laser (4) to emit a heating beam, the heating beam finally irradiates a preset heating area on the quartz rod (7) after a number of mirror reflections to heat the quartz rod (7); The heating temperature of the preset heating area is detected, and when the heating temperature reaches the preset drawing temperature, the upper clamp (6) is controlled to move upward, and the converging reflector (5) is controlled to move downward, until the quartz rod (7) is drawn to a preset length, thereby obtaining a quartz wire.

10. A method for drawing a fused quartz wire according to claim 9, It is characterized in that The heating beam is a 10.6 μm infrared laser.

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