Magnetic control light beam positioning device

Abstract

The invention discloses a magnetic control light beam positioning device, which belongs to the technical field of manufacturing of optical fiber passive devices and comprises a main body mechanism, a transmitting mechanism and a suspension positioning mechanism, a plurality of first electromagnetic coils are annularly arranged in a suspension positioning mechanism at intervals, a suspension positioning piece is suspended among the first electromagnetic coils under the action of attractive force or repulsive force of the first electromagnetic coils, and a quartz end cap is fixed on the suspension positioning piece, so that the suspension positioning piece can be suspended between the first electromagnetic coils by adjusting the magnetic force and the magnetic pole direction of the electromagnetic coils. Regular movement of the suspension positioning piece is achieved, and then high-frequency and large-amplitude swing of the launching mechanism is achieved. The magnetic control light beam positioning device is simple in structure and reasonable in design, the high-frequency and large-amplitude position change of the light beam under the action of the magnetic field of the electromagnetic coil is achieved through on-off of the electromagnetic coil and the magnitude and direction of the current, the freedom degree of position movement of the quartz end cap is increased, and deflection in a larger range is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing optical fiber passive components, and in particular relates to a magnetically controlled light beam positioning device. Background Art

[0002] As an important strategic supporting technology, laser technology has a wide range of applications, including but not limited to precision manufacturing, cutting, welding, surface treatment, etc. The application of laser technology in these industries has significantly improved the production efficiency and product quality of the industry and promoted the process of industrial intelligence.

[0003] Among them, power enhancement is an important branch of the development of laser technology, and power synthesis is the main method of power enhancement. It mainly controls the output light beam to superimpose the beams at the target point, and then adjusts the laser output power, the number of laser output apertures, and related laser parameters to achieve beam synthesis with higher energy density and better beam quality.

[0004] In the process of beam synthesis, the positioning and deflection of the beam is the most important and basic step. The laser beam output by the laser needs to be adjusted quickly and over a large range to ensure the actual synthesis effect. The traditional method is to use a fast-emitting mirror, but for the case of a large number of synthesis paths, the use of a fast-reflecting mirror will undoubtedly increase the volume of the system, and when the number of synthesis paths increases, it will also cause a lot of trouble for subsequent installation, maintenance, and repair. Another method is to use piezoelectric ceramics to promote the high-frequency vibration of the optical fiber tip as the laser output end face. However, as the output power of the laser increases, the tip of the optical fiber will not be able to meet the high-power output, and the laser output must be replaced with a quartz end cap output to improve the stability of the laser. However, the method of using piezoelectric ceramics to deflect light beams cannot achieve deflections of kilohertz and hundreds of microns at the same time. This is mainly because of the limitations of the properties of piezoelectric ceramics. It is also related to the installation structure. In order to maintain linkage with the piezoelectric ceramics during installation, the end caps use a thin cross beam. During high-frequency deflection movement, when moving in a certain direction, it will be affected by the stiffness of the metal structure in other directions of the cross beam, causing the deflection amount to decrease, which is more likely to cause damage to the quartz end caps. Summary of the invention

[0005] In view of one or more of the above defects or improvement needs in the prior art, the present invention provides a magnetically controlled light beam positioning device, which can achieve high-frequency and large-amplitude position changes of the light beam.

[0006] To achieve the above-mentioned purpose, the present invention provides a magnetically controlled light beam positioning device, which includes a main body mechanism, a launching mechanism and a suspension positioning mechanism;

[0007] The main body mechanism comprises a base and a fixed beam; the fixed beam is arranged in a plurality of circumferential intervals along one side of the base, and one end of the fixed beam is fixed to the side of the base, and the other end is a suspended end;

[0008] The suspension positioning mechanism comprises a first electromagnetic coil and a suspension positioning member; the first electromagnetic coil is arranged at intervals along the circumferential direction in a plurality of manners, and the first electromagnetic coil is fixedly arranged at the suspended end of the fixed beam; the suspension positioning member can be suspended under the magnetic force of the plurality of first electromagnetic coils, and the suspension positioning member can be controlled to deflect by adjusting the current size and magnetic pole direction of the first electromagnetic coil;

[0009] The transmitting mechanism comprises an energy transmission optical fiber and a quartz end cap, wherein the energy transmission optical fiber is connected to the quartz end cap; the end of the quartz end cap away from the energy transmission optical fiber is a laser transmitting end, and is fixedly connected to the suspension positioning member so as to deflect with the suspension positioning member.

[0010] As a further improvement of the present invention, a hollow structure whose inner diameter matches the outer diameter of the quartz end cap is provided on the suspended positioning member, and the quartz end cap is passed through and fixed in the hollow structure.

[0011] As a further improvement of the present invention, a first magnetic conductive member is arranged on the suspension positioning member; the first magnetic conductive member is entirely covered on the periphery of the quartz end cap, or a plurality of the first magnetic conductive members are arranged in annular spacing along the periphery of the quartz end cap.

[0012] As a further improvement of the present invention, the base includes a chassis and a protruding structure, one end of the fixed beam is connected to the chassis; the protruding structure is hollow inside and is arranged on a side of the chassis close to the fixed beam to form a T-shaped structure with the chassis;

[0013] One end of the energy transmission optical fiber passes through the bottom plate and the inner hollow of the protruding structure in sequence, and is connected to the quartz end cap.

[0014] As a further improvement of the present invention, it also includes a follower mechanism, wherein the follower mechanism includes a second electromagnetic coil and a second magnetic conductive member;

[0015] The second electromagnetic coil is provided in plurality and is arranged at intervals along the circumferential direction on the hollow inner wall of the protruding structure;

[0016] The second magnetic conductive member is arranged corresponding to the second electromagnetic coil and is fixedly sleeved on the outer circumference of the energy transmission optical fiber, so that the energy transmission optical fiber can be suspended or fixed under the action of the second magnetic conductive member and the second electromagnetic coil.

[0017] As a further improvement of the present invention, the second magnetic conductive component is formed by circumferentially stripping off part of the outer sheath of the energy transmitting optical fiber and coating the stripped part with a magnetic conductive coating, and the thickness of the magnetic conductive coating is greater than the stripped thickness of the energy transmitting optical fiber.

[0018] As a further improvement of the present invention, the second magnetic conductive member is formed by circumferentially stripping off a portion of the outer sheath of the energy transmitting optical fiber and sleeved with a magnetic conductive block on the outer periphery of the stripped portion.

[0019] As a further improvement of the present invention, it further comprises at least one detector to detect the displacement of the suspended positioning member;

[0020] The detector is arranged on an end surface of the chassis close to the protruding structure; or the detector is arranged on an end surface of the protruding structure away from the chassis.

[0021] As a further improvement of the present invention, the fixed beam is made of non-magnetic material and is configured as a telescopic structure; a limiting screw knob is also provided corresponding to the fixed beam to achieve the extension or shortening of the fixed beam through the limiting screw knob to adjust the axial position of the first electromagnetic coil.

[0022] As a further improvement of the present invention, four first electromagnetic coils are evenly arranged along the circumferential direction on one side of the base, and the number of turns of each electromagnetic coil is determined according to the weight of the suspension positioning member and the quartz end cap.

[0023] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0024] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0025] (1) The magnetron beam positioning device of the present invention arranges a plurality of first electromagnetic coils in a circumferential direction in a suspension positioning mechanism, so that a suspension positioning member is suspended between the first electromagnetic coils under the action of the attraction or repulsion of the plurality of first electromagnetic coils, and a quartz end cap is fixed on the suspension positioning member, so that the magnetic force and magnetic pole direction of the electromagnetic coil are adjusted to achieve regular movement of the suspension positioning member, thereby achieving high-frequency and large-amplitude swing of the quartz end cap.

[0026] (2) The magnetron beam positioning device of the present invention sets a follow-up mechanism corresponding to the energy transmission optical fiber to fix or suspend the position of the energy transmission optical fiber under the action of the second electromagnetic coil. When the quartz end cap swings at a high frequency, the energy transmission optical fiber moves accordingly by controlling the magnetic force and magnetic pole direction of the second electromagnetic coil, thereby increasing the degree of freedom and flexibility of the transmitting mechanism and improving the movable range of the quartz end cap.

[0027] (3) The magnetically controlled light beam positioning device of the present invention detects the displacement of the suspended positioning member by setting a detector, thereby realizing feedback of the current in the magnetic field and achieving the purpose of closed-loop control.

[0028] (4) The magnetron beam positioning device of the present invention adjusts the position of the first electromagnetic coil by setting the fixed beam as a telescopic structure through the extension or contraction of the fixed beam, and further fine-tunes the front and rear positions of the suspended quartz end caps without damaging the quartz end caps, so as to compensate for the focal length error of the system.

[0029] (5) The magnetically controlled light beam positioning device of the present invention has a simple structure and a reasonable design. By controlling the on and off of the electromagnetic coil, the magnitude of the current and the direction of the current, the high-frequency and large-amplitude position change of the light beam under the action of the magnetic field of the electromagnetic coil is realized, thereby increasing the degree of freedom of movement of the quartz end cap and achieving a larger range of deflection. It has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a schematic diagram of the side view structure of a magnetically controlled light beam positioning device in an embodiment of the present invention;

[0032] Figure 2 is a front view structural schematic diagram of a magnetically controlled light beam positioning device according to an embodiment of the present invention;

[0033] In all the drawings, the same figure marks represent the same technical features, specifically: 1. base; 101. chassis; 102. raised structure; 2. fixed beam; 3. energy transmission optical fiber; 4. quartz end cap; 5. first electromagnetic coil; 6. suspended positioning member; 7. second electromagnetic coil; 8. second magnetic conductive member; 9. detector. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Example:

[0040] See also Figure 1-2 The magnetron beam positioning device in the preferred embodiment of the present invention includes a main body mechanism, a launching mechanism and a suspension positioning mechanism, so that other structures are supported by the main body mechanism, a high-frequency beam is emitted by the launching mechanism, and the launching end of the launching mechanism is suspended by the suspension positioning mechanism to realize high-frequency deflection of the beam.

[0041] Specifically, if Figure 1 As shown in the figure, the main structure in the preferred embodiment includes a base 1 and a fixed beam 2; wherein the base 1 includes a chassis 101, which is in the shape of a cylinder or a cube and consists of an outer layer and an inner layer, wherein the outer layer is a circuit board, which is convenient for the first electromagnetic coil 5 and the second electromagnetic coil 7 to be connected to electricity, and the inner layer is made of a non-magnetic metal material to avoid affecting the magnetic force of the first electromagnetic coil 5 and the second electromagnetic coil 7.

[0042] Correspondingly, the fixed beam 2 is made of non-magnetic material, and is arranged in multiple circumferential intervals along one side of the chassis 101, and one end of the fixed beam 2 is fixedly connected to the base 1, and the other end is suspended as a suspended end.

[0043] Preferably, the fixed beam 2 is a telescopic structure as a whole, and a limit screw knob is provided corresponding to the fixed beam 2, so that the fixed beam 2 can be extended or shortened by turning the limit screw knob as needed, thereby adjusting the position of the suspended end of the fixed beam 2 relative to the base 1, so that in the subsequent system installation and adjustment process, the position of the suspended end of the fixed beam 2 can be adjusted without damaging the quartz end cap 4, thereby fine-tuning the position of the suspended quartz end cap 4 to compensate for the focal length error of the system.

[0044] Preferably, a protruding structure 102 is provided on one side of the chassis 101 close to the fixed beam 2 , and the protruding structure 102 is hollow inside. It is further preferred that the protruding structure 102 is a hollow tetrahedron with a rectangular cross-section, which is combined with the chassis 101 to form a T-shaped structure.

[0045] In actual setting, under the premise of ensuring the position accuracy, the fixed beam 2 and the base 1 can be integrated into a whole by mechanical processing, or they can be connected later by mechanical fixing.

[0046] Furthermore, the suspension positioning mechanism in the preferred embodiment includes a first electromagnetic coil 5 and a suspension positioning member 6. The first electromagnetic coil 5 is arranged in a plurality of circumferential intervals, and the first electromagnetic coil 5 is fixedly arranged at the suspended end of the fixed beam 2 so as to be supported by the fixed beam 2.

[0047] In actual setting, the number of fixed beams 2 is matched with the number of first electromagnetic coils 5, that is, one first electromagnetic coil 5 is fixed to one fixed beam 2. Figure 2 In the preferred embodiment shown, four first electromagnetic coils 5 are evenly arranged along the circumferential direction on one side of the base 1, and the circumferential arc between every two adjacent first electromagnetic coils 5 is 90 degrees.

[0048] Accordingly, the material of the suspension positioning member 6 at least includes a magnetic conductive material, so that it can be suspended under the action of the plurality of first electromagnetic coils 5, and the suspension positioning member 6 can be controlled to deflect by adjusting the current magnitude and magnetic pole direction of the first electromagnetic coils 5. The suspension positioning member 6 in the preferred embodiment is a cube with a rectangular cross section.

[0049] In actual setting, the number of the first electromagnetic coils 5 is determined according to the magnetic conductive part of the suspension positioning member 6 and the magnetic force required for suspension and position adjustment of the first electromagnetic coils 5 .

[0050] Furthermore, the transmitting mechanism in the preferred embodiment includes an energy transmission optical fiber 3 and a quartz end cap 4. One end of the energy transmission optical fiber 3 passes through the inner hollow of the chassis 101 and the protruding structure 102 in sequence, and is connected to the quartz end cap 4 by fusion splicing;

[0051] Correspondingly, the end of the quartz end cap 4 away from the energy transmission optical fiber 3 is the laser output end, and the laser is emitted by the laser output end of the quartz end cap 4; at the same time, the quartz end cap 4 is fixedly set on the suspended positioning member 6 to drive the quartz end cap 4 to swing through the suspended positioning member 6.

[0052] Preferably, a hollow structure is provided in the middle of the suspension positioning member 6 corresponding to the arrangement of the quartz end cap 4, and the inner diameter of the hollow structure matches the outer diameter of the quartz end cap 4, so that the quartz end cap 4 is inserted and fixed in the hollow structure. In a preferred embodiment, the overall thickness of the suspension positioning member 6 is at least 1 mm less than the length of the quartz end cap 4, so that both ends of the quartz end cap 4 protrude from both ends of the suspension positioning member 6, so as to avoid the hollow structure from affecting the emission path and the emission angle range of the laser.

[0053] In actual setting, it is preferred to set screw holes on the outer periphery of the hollow structure, so that after the quartz end cap 4 is inserted into the hollow structure, the position of the quartz end cap 4 can be adjusted and positioned by screwing a top screw into the screw hole, and after the position adjustment is completed, ultraviolet optical glue is used for light curing to fix the quartz end cap 4 in the hollow structure.

[0054] Preferably, a first magnetic conductive member is provided on the suspension positioning member 6, and the first magnetic conductive member can be provided as a whole piece and covered on the outer periphery of the quartz end cap 4 as a whole piece. Of course, it can also be provided as a plurality of small pieces and arranged circumferentially and spaced along the outer periphery of the quartz end cap 4, so as to realize the suspension of the suspension positioning member 6 and the quartz end cap 4 through the electromagnetic action between the first magnetic conductive member and the first electromagnetic coil 5. In actual setting, the size of the first magnetic conductive member is determined according to the weight of the quartz end cap 4 and the magnetic force of the first electromagnetic coil 5.

[0055] In actual setting, the number of turns of each first electromagnetic coil 5 is determined according to the weight of the suspended positioning member 6 and the quartz end cap 4, and simulation and testing are carried out between the magnetic field generated by each first electromagnetic coil 5 and the suspended positioning member 6, so that the formed magnetic field corresponds to the suspended positioning member 6, and the position of the suspended positioning member 6 is controlled by adjusting the magnetic force and the direction of the magnetic pole of the first electromagnetic coil 5, thereby driving the quartz end cap 4 to swing through the suspended positioning member 6.

[0056] Since the electric field change rate and adjustment rate can reach several thousand hertz, the position of the quartz end cap 4 is controlled by magnetic levitation, so that the light beam emitted by the quartz end cap 4 can also reach an adjustment rate of several thousand hertz. Since the quartz end cap 4 is in a suspended state, there are no other structural restrictions, so it can achieve a larger displacement deflection or a smaller range of circular motion.

[0057] Preferably, the magneto-controlled beam positioning device of the present invention further comprises a follow-up mechanism, which specifically comprises a second electromagnetic coil 7 and a second magnetic conductive member 8, wherein the second electromagnetic coil 7 is provided in plurality and is arranged at intervals along the annular direction on the hollow inner wall of the protruding structure 102. Figure 2 As shown in FIG. 1 , four second electromagnetic coils 7 are evenly spaced along the circumferential direction on the hollow inner wall of the protruding structure 102 .

[0058] At the same time, the second magnetic conductive component 8 is arranged corresponding to the second electromagnetic coil 7, and is fixedly mounted on the outer periphery of the energy transmission optical fiber 3 corresponding to the second electromagnetic coil 7, so that the energy transmission optical fiber 3 can be suspended and fixed under the action of the second magnetic conductive component 8 and the second electromagnetic coil 7, so as to increase the freedom and flexibility of the transmitting mechanism during the suspension process, improve the freedom of the tail optical fiber when the quartz end cap 4 is displaced in a large range, and increase the displacement range of the quartz end cap 4 while ensuring appropriate stress near the melting point of the quartz end cap 4 and the energy transmission optical fiber 3.

[0059] Preferably, in actual setting, the second magnetic conductive member 8 can be formed by circumferentially stripping off a portion of the outer sheath of the energy transmission optical fiber 3 that is inserted into the protruding structure 102 to expose the bare fiber inside, and coating the stripped portion with a magnetic conductive coating, and the thickness of the magnetic conductive coating is greater than the stripped thickness of the energy transmission optical fiber 3, so that the formed second magnetic conductive member 8 protrudes from the outer peripheral wall of the energy transmission optical fiber 3. Of course, it is also possible to directly sleeve a magnetic conductive block as the second magnetic conductive member 8 after circumferentially stripping off a portion of the outer sheath of the energy transmission optical fiber 3.

[0060] In actual operation, the magnetic pole direction and magnetic force of the first electromagnetic coil 5 can be adjusted to suspend the suspension positioning member 6, and then the magnetic pole direction and magnetic force of the second electromagnetic coil 7 in the protruding structure 102 can be adjusted to suspend the energy transmission optical fiber 3.

[0061] Furthermore, the magnetic hole beam positioning device in the present invention also includes at least one detector 9, which can be a photoelectric detector or a magnetic field detector, so as to detect the displacement of the suspended positioning member 6 through the detector 9, and through signal conversion, realize feedback of the current in the magnetic field to achieve the purpose of closed-loop control.

[0062] In actual setting, the detector 9 is set on the end surface of the chassis 101 close to the protruding structure 102, or on the end surface of the protruding structure 102 away from the chassis 101, as long as the detection end of the detector 9 faces the suspended positioning member 6.

[0063] The magnetically controlled light beam positioning device of the present invention has a simple structure and a reasonable design. Through the on-off of the electromagnetic coil, the magnitude of the current and the direction of the current, the high-frequency and large-amplitude position change of the light beam under the action of the magnetic field of the electromagnetic coil is realized, the degree of freedom of movement of the quartz end cap position is increased, and a larger range of deflection is achieved, which has good application prospects and promotion value.

[0064] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetically controlled beam positioning device, characterized in that: It includes a main body mechanism, a launching mechanism and a suspension positioning mechanism; The main body mechanism comprises a base and a fixed beam; the fixed beam is arranged in a plurality of circumferential intervals along one side of the base, and one end of the fixed beam is fixed to the side of the base, and the other end is a suspended end; The suspension positioning mechanism comprises a first electromagnetic coil and a suspension positioning member; the first electromagnetic coil is arranged at intervals in the circumferential direction in a plurality, and the first electromagnetic coil is fixedly arranged at the suspended end of the fixed beam; the suspension positioning member can be suspended under the magnetic force of the plurality of first electromagnetic coils, and the suspension positioning member can be controlled to deflect by adjusting the current size and magnetic pole direction of the first electromagnetic coil; The transmitting mechanism comprises an energy transmission optical fiber and a quartz end cap, wherein the energy transmission optical fiber is connected to the quartz end cap; the end of the quartz end cap away from the energy transmission optical fiber is a laser transmitting end, and is fixedly connected to the suspension positioning member so as to deflect with the suspension positioning member.

2. The magnetic control beam positioning device according to claim 1, characterized in that: The suspended positioning member is provided with a hollow structure whose inner diameter matches the outer diameter of the quartz end cap, and the quartz end cap is passed through and fixed in the hollow structure.

3. The magnetic control beam positioning device according to claim 2, characterized in that: The suspension positioning member is provided with a first magnetic conductive member; the first magnetic conductive member is entirely covered on the outer periphery of the quartz end cap, or the first magnetic conductive member is arranged in a plurality of circumferential directions at intervals along the outer periphery of the quartz end cap.

4. The magnetic control beam positioning device according to any one of claims 1 to 3, characterized in that: The base includes a chassis and a raised structure, one end of the fixed beam is connected to the chassis; the raised structure is hollow inside and is arranged on a side of the chassis close to the fixed beam to form a T-shaped structure with the chassis; One end of the energy transmission optical fiber passes through the bottom plate and the inner hollow of the protruding structure in sequence, and is connected to the quartz end cap.

5. The magnetic control beam positioning device according to claim 4, characterized in that: It also includes a follower mechanism, which includes a second electromagnetic coil and a second magnetic conductive member; The second electromagnetic coil is provided in plurality and is arranged at intervals along the circumferential direction on the hollow inner wall of the protruding structure; The second magnetic conductive member is arranged corresponding to the second electromagnetic coil and is fixedly sleeved on the outer circumference of the energy transmission optical fiber, so that the energy transmission optical fiber can be suspended or fixed under the action of the second magnetic conductive member and the second electromagnetic coil.

6. The magnetic control beam positioning device according to claim 5, characterized in that: The second magnetic conductive component is formed by circumferentially stripping off part of the outer sheath of the energy transmission optical fiber and coating the stripped part with a magnetic conductive coating, and the thickness of the magnetic conductive coating is greater than the stripped thickness of the energy transmission optical fiber.

7. The magnetic control beam positioning device according to claim 6, characterized in that: The second magnetic conductive member is formed by circumferentially stripping off a portion of the outer sheath of the energy transmission optical fiber and sleeved with a magnetic conductive block on the outer periphery of the stripped portion.

8. The magnetic control beam positioning device according to claim 4, characterized in that: Also includes at least one detector to detect the displacement of the suspended positioning member; The detector is arranged on an end surface of the chassis close to the protruding structure; or the detector is arranged on an end surface of the protruding structure away from the chassis.

9. The magnetic control beam positioning device according to claim 1, characterized in that: The fixed beam is made of non-magnetic material and is configured as a telescopic structure; a limit screw knob is also provided corresponding to the fixed beam, so that the fixed beam can be extended or shortened through the limit screw knob to adjust the axial position of the first electromagnetic coil.

10. The magnetron beam positioning device according to any one of claims 1 to 3 and 5 to 9, characterized in that: Four first electromagnetic coils are evenly arranged along the circumferential direction on one side of the base, and the number of turns of each electromagnetic coil is determined according to the weight of the suspension positioning member and the quartz end cap.

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