High-precision laser detection and coupling device

Abstract

The utility model discloses a high precision laser detection and coupling device, relates to the laser application technology field, the high precision laser detection and coupling device comprises a laser beam combining module, an optical fiber coupling module and a moving module, the laser beam combining module comprises a plurality of laser emitters, a plurality of beam combining mirrors and an imaging camera, the position of the beam combiner can be adjusted, the beam combiner is arranged corresponding to the laser emitter, light beams emitted by the laser emitter are collected into a combined laser through the beam combiner, the optical fiber coupling module comprises an optical fiber coupler and a collimating lens, the imaging camera and the collimating lens are both installed on the moving module, the moving module has a first state and a second state, and the first state is the first state. The imaging camera can detect a light spot formed on a lens of the imaging camera by the combined laser; in the second state, the collimating mirror can allow the beam-combined laser to pass through so as to be coupled into the optical fiber. The technical scheme provided by the utility model aims to improve the coupling precision of the laser and the optical fiber while detecting the beam combining degree of multiple beams of laser.

Description

Technical Field

[0001] The utility model relates to the technical field of laser application, in particular to a high-precision laser detection and coupling device. Background Art

[0002] With the development of laser and fiber technology, the application scope of laser technology has expanded from optical communication to laser detection, laser display, laser ablation propulsion, and biomedicine. It has shown great application prospects in civil, industrial, medical, and military fields, and has put forward higher requirements for laser intensity. At present, there are two ways to improve laser intensity. Usually, one is to choose one of the improvement directions. One is to combine multiple laser beams to increase the intensity of the laser emitted by the laser when a single laser beam usually cannot meet the application requirements, thereby increasing the intensity of the laser transmitted through the optical fiber; the other is to increase the coupling rate between the laser and the optical fiber, thereby increasing the intensity of the laser transmitted through the optical fiber. However, in the process of combining multiple laser beams, there is incomplete combining, that is, there is a situation where the beam deviates, which affects the coupling rate of the laser. Therefore, it is necessary to test the degree of combining multiple laser beams. Utility Model Content

[0003] The main purpose of the utility model is to provide a high-precision laser detection and coupling device, which aims to detect the degree of beam combining of multiple laser beams and improve the coupling accuracy of laser and optical fiber.

[0004] To achieve the above purpose, the high-precision laser detection and coupling device proposed by the utility model includes:

[0005] A laser beam combining module, the laser beam combining module comprising at least two laser emitters, at least two beam combining mirrors, and an imaging camera, the position of the beam combining mirrors being adjustable, the beam combining mirrors being arranged in one-to-one correspondence with the laser emitters, the light beams emitted by the laser emitters being gathered into a combined laser beam through the beam combining mirrors, and the combined laser beam having an installation position in the irradiation direction;

[0006] The optical fiber coupling module comprises an optical fiber coupler and a collimator, wherein the combined laser beam passes through the collimator and the optical fiber coupler in sequence and is coupled into the optical fiber;

[0007] A moving module, the imaging camera and the collimating mirror are both installed on the moving module, the moving module can make the imaging camera and the collimating mirror move along a first direction, the first direction is arranged to intersect with the irradiation direction of the combined laser beam, the moving module has a first state and a second state, in the first state, the imaging camera is located at the installation position, and can detect the light spot formed by the combined laser beam on the lens of the imaging camera; in the second state, the collimating mirror is located at the installation position, and can allow the combined laser beam to pass through to couple into the optical fiber.

[0008] In one embodiment, the mobile module includes a transverse movement assembly, the transverse movement assembly includes a transverse movement rail, and at least one transverse movement platform movably arranged on the transverse movement rail, the transverse movement rail extends along the first direction, the imaging camera and the collimating mirror are arranged on the transverse movement platform, and the transverse movement rail is set through the installation position.

[0009] In one embodiment, the transverse platform is provided with a stopper at both ends of the transverse slide rail, and in the first state and the second state, one end of the transverse platform away from the installation position abuts against the stopper.

[0010] In one embodiment, the fiber coupling module further includes a five-axis adjustment platform, the collimating mirror is disposed on the five-axis adjustment platform, and the five-axis adjustment platform is disposed on the transverse movement platform.

[0011] In one embodiment, the moving module further includes a translation component, which extends along the irradiation direction of the combined laser beam so as to enable the collimating mirror and the imaging camera to move closer to or farther away from the combined laser beam.

[0012] In one embodiment, the transverse platform extends along the irradiation direction of the combined laser beam, the translation assembly is arranged on the transverse platform, and includes a translation rail and a translation platform movably arranged on the translation rail, and the collimating mirror and the imaging camera are arranged on the translation platform.

[0013] In one embodiment, the fiber coupling module further includes a fiber adjustment component, the fiber coupler is disposed on the fiber adjustment component, and the fiber adjustment component is used to move the fiber coupler along the irradiation direction of the combined laser beam.

[0014] In one embodiment, the laser beam combining module includes a cage coaxial component, which includes a first assembly rod, a cage cube, and a precision rotation adjustment table. The cage cube and the precision rotation adjustment table are each provided with a plurality of them, and are each arranged in a one-to-one correspondence with the laser emitter. The precision rotation adjustment table is installed in the cage cube, and the beam combining mirror is arranged on the precision rotation adjustment table. The precision rotation adjustment table is used to adjust the rotation angle of the beam combining mirror. The first assembly rod extends along a second direction to arrange the plurality of cage cubes along the second direction, and the second direction is arranged to intersect with the first direction.

[0015] In one embodiment, the cage coaxial assembly further includes a second assembly rod extending along the first direction and connecting the laser and the cage cube.

[0016] In one embodiment, the high-precision laser detection and coupling device also includes an electronic control module, which is electrically connected to the precision rotation adjustment table and the imaging camera so as to be able to intelligently adjust the position of the beam combiner according to the spot image taken by the imaging camera.

[0017] The high-precision laser detection and coupling device in the technical solution of the utility model includes a laser beam combining module, a fiber coupling module and a mobile module. The laser beam combining module includes at least two laser emitters, at least two beam combining mirrors, and an imaging camera. The position of the beam combining mirrors can be adjusted. The beam combining mirrors are arranged in a one-to-one correspondence with the laser emitters. The light beams emitted by the laser emitters are converged into a combined laser through the beam combining mirrors. The combined laser has an installation position in the irradiation direction. The imaging camera is installed on the mobile module. The mobile module has a first state and a second state. In the first state, the imaging camera is located at the installation position and can detect the light spot formed by the combined laser on the lens of the imaging camera. If there are more than two light spots on the imaging camera, it is necessary to adjust the position of the beam combining mirrors to combine the light spots displayed on the imaging camera into one. At this time, it can be considered that the laser beam combining operation is completed. The fiber coupling module includes a fiber coupler and a collimator. The combined laser beam passes through the collimator and the fiber coupler in sequence and is coupled into the optical fiber. The collimator is installed on the mobile module. The first direction is arranged to intersect with the irradiation direction of the combined laser beam. The mobile module can move the imaging camera and the collimator along the first direction to switch between the first state and the second state. In the second state, the collimator is located at the installation position and can allow the combined laser beam to pass through to couple into the optical fiber. In the first state, the imaging camera will record the position of the light spot, and adjust the beam combining mirror and / or the collimator according to the record to complete the detection of the degree of combining of the combined laser beams, and can adjust the position of the light spot or the position of the collimator by detecting the position of the light spot to improve the coupling rate of the laser beam. Specifically, when the mobile component is in the second state, the combined laser beam passes through the center of the collimator so that the combined laser beam can be coupled into the optical fiber by the fiber coupler. That is, on one device, both laser beam combining and improving the coupling rate can be used to enhance the laser intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a high-precision laser detection and coupling device provided by the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure when the mobile module is in the second state;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the laser beam combining module.

[0022] Description of Figure Numbers:

[0023] 100, laser beam combining module; 11, laser transmitter; 12, beam combining mirror; 13, imaging camera; 14, installation position; 15, cage coaxial assembly; 151, first assembly support; 152, cage cube; 153, precision rotary adjustment table; 154, second assembly support rod; 16, bracket;

[0024] 200, optical fiber coupling module; 21, optical fiber coupler; 22, collimator; 23, five-axis adjustment table;

[0025] 300, moving module; 31, transverse movement assembly; 311, transverse movement rail; 312, transverse movement platform; 313, stopper; 32, translation assembly; 321, translation rail; 322, translation platform.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] The utility model provides a high-precision laser detection and coupling device.

[0031] See also Figures 1 to 3In one embodiment of the utility model, the high-precision laser detection and coupling device includes a laser beam combining module 100, a fiber coupling module 200 and a moving module 300. The laser beam combining module 100 includes at least two laser emitters 11, at least two beam combining mirrors 12, and an imaging camera 13. The position of the beam combining mirror 12 can be adjusted. The beam combining mirror 12 is arranged in a one-to-one correspondence with the laser emitter 11. The light beam emitted by the laser emitter 11 is collected into a beam combining laser through the beam combining mirror 12. The beam combining laser has an installation position 14 in the irradiation direction. The imaging camera 13 is installed on the moving module 300. The moving module 300 has a first state and a second state. In the first state, the imaging camera 13 is located at the installation position 14 and can detect the light spot formed by the beam combining laser on the lens of the imaging camera 13. If there are more than two light spots on the imaging camera 13, it is necessary to adjust the position of the beam combining mirror 12 to combine the light spots displayed on the imaging camera 13 into one. At this time, it can be considered that the laser beam combining operation is completed. The fiber coupling module 200 includes a fiber coupler 21 and a collimator 22. The combined laser beam passes through the collimator 22 and the fiber coupler 21 in sequence and is coupled into the optical fiber. The collimator 22 is installed on the moving module 300. The first direction is arranged to intersect with the irradiation direction of the combined laser beam. The moving module 300 can move the imaging camera 13 and the collimator 22 along the first direction to switch between the first state and the second state. In the second state, the collimator 22 is located at the installation position 14 and can allow the combined laser beam to pass through to couple into the optical fiber. In the first state, the imaging camera 13 will record the position of the light spot, and adjust the beam combining mirror 12 and / or the collimator 22 according to the record to complete the detection of the degree of combining of the combined laser beam, and can adjust the position of the light spot or the position of the collimator 22 by detecting the position of the light spot to improve the coupling rate of the laser beam. Specifically, when the moving component is in the second state, the combined laser beam passes through the center of the collimator 22, so that the combined laser beam is coupled into the optical fiber by the fiber coupler 21. That is, on one device, both laser beam combining and coupling efficiency enhancement can be used to enhance the laser intensity.

[0032] In one embodiment, the mobile module 300 includes a transverse moving assembly 31, the transverse moving assembly 31 includes a transverse moving rail 311, and at least one transverse moving platform 312 movably arranged on the transverse moving rail 311, the transverse moving rail 311 extends along a first direction, that is, the first direction is a direction on a horizontal plane, the imaging camera 13 and the collimator 22 are arranged on the transverse moving platform 312, and the transverse moving rail 311 is arranged through the installation position 14, so that the transverse moving platform 312 can be moved to the installation position 14, so that the imaging camera 13 or the collimator 22 can receive the combined laser beam. In other embodiments, the mobile module 300 can also include a lifting assembly, the first direction is the height direction, and the imaging camera 13 and the collimator 22 are moved in the height direction so that the imaging camera 13 or the collimator 22 can receive the combined laser beam at the installation position 14.

[0033] In one embodiment, the traverse platform 312 is provided with a stopper 313 at both ends of the traverse slide rail 311. In the first state and the second state, the end of the traverse platform 312 away from the installation position 14 abuts against the stopper 313. That is, at this time, the position of the fiber coupler 21 in the first direction is fixed, and when the moving module 300 is in the first state or the second state, the collimator 22 or the imaging camera 13 needs to be coaxially arranged with the fiber coupler 21, so that the installation position 14 is fixed in the first direction. In the first state, by adjusting the position of the beam combiner 12, the light spot is adjusted to a preset point in the image formed by the imaging camera 13, and the preset point is relative to the center of the collimator 22, so that when in the second state, the combined laser can directly pass through the center of the collimator 22. The stopper 313 is used to limit the extreme position of the traverse platform 312, so that when the traverse platform 312 moves to the extreme position, the imaging camera or the collimator 22 is located at the installation position 14. In other embodiments, two transverse moving platforms 312 may be provided, and the imaging phase and the collimating mirror 22 may be respectively installed on the two transverse moving platforms 312 .

[0034] In one embodiment, the fiber coupling module 200 further includes a five-axis adjustment platform 23, on which the collimator 22 is disposed, and the five-axis adjustment platform 23 is disposed on the transverse platform 312. The five-axis adjustment platform 23 can finely adjust the position of the collimator 22 on the transverse platform 312, so that the center of the collimator 22 can be close to the preset point of the imaging camera 13 and can be coaxially arranged with the axis of the fiber coupler 21. In other embodiments, the fiber coupler 21 can also be installed on the five-axis adjustment platform 23.

[0035] In one embodiment, the moving module 300 further includes a translation assembly 32, which extends along the irradiation direction of the combined laser beam so as to enable the collimator 22 and the imaging camera 13 to approach or move away from the combined laser beam 12. When the moving module 300 is in the first state, the imaging camera 13 can approach or move away from the combined laser beam 12 so as to observe the pattern when the light spot is clearest, that is, the most condensed position of the laser beam combination, and determine the position as the position of the installation position 14 in the irradiation direction of the combined laser beam, so that the laser beam refracted by the collimator 22 has greater energy, and the laser beam is more condensed and has a smaller diameter, which is convenient for coupling into the optical fiber through the optical fiber coupler 21. The transverse platform 312 extends along the irradiation direction of the combined laser beam, and the translation assembly 32 is arranged on the transverse platform 312, and includes a translation rail 321, and a translation platform 322 movably arranged on the translation rail 321, and the collimator 22 and the imaging camera 13 are arranged on the translation platform 322. That is, when the light spots captured by the imaging camera 13 are overlapped and at the preset point, the translation rail 321 drives the translation platform 322 to move on the transverse platform 312 to find the position where the light spots are clearest. After finding the position, the transverse platform 312 moves so that the combined laser beam passes through the center of the collimator 22. In other embodiments, the translation component 32 may not be provided. In another embodiment, the transverse component 31 may be provided on the translation platform 322.

[0036] In one embodiment, the imaging camera 13 is mounted on the translation platform 322 via a bracket 16, and the bracket 16 can be retracted. Specifically, a linear motor can be provided on the bracket 16, and a push rod of the linear motor pushes the imaging camera 13 to move in the height direction. In other embodiments, the bracket 16 can also include a first set of rods and a second set of rods that are nested with each other, and the first set of rods and the second set of rods can slide with each other, and there is a locking piece between the first set of rods and the second set of rods, and the first set of rods and the second set of rods can be relatively fixed by screwing the locking piece to adjust the height of the imaging camera 13.

[0037] In one embodiment, the fiber coupling module 200 further includes a fiber adjustment component, and the fiber coupler 21 is disposed in the fiber adjustment component, and the fiber adjustment component is used to move the fiber coupler 21 along the irradiation direction of the combined laser beam, so as to make the fiber coupler 21 approach or move away from the collimator 22 to adjust the coupling rate between the fiber and the laser. In other embodiments, the fiber adjustment component may not be provided.

[0038] In one embodiment, the laser beam combining module 100 includes a cage coaxial assembly 15, which includes a first assembly support rod 151, a cage cube 152, and a precision rotation adjustment table 153. There are multiple cage cubes 152 and precision rotation adjustment tables 153, and each is arranged in a one-to-one correspondence with the laser emitter 11. The precision rotation adjustment table 153 is installed in the cage cube 152, and the beam combining mirror 12 is arranged on the precision rotation adjustment table 153. The precision rotation adjustment table 153 and the cage cube 152 are combined to provide 360-degree free rotation. The precision rotation adjustment table 153 is used to adjust the rotation angle of the beam combining mirror 12. The assembly support rod extends along the second direction to arrange the multiple cage cubes 152 along the second direction, and the second direction is arranged to intersect with the first direction. Furthermore, the precision rotation adjustment table 153 can be driven by a micrometer to perform precision rotation of arc magnitude, and two hexagonal screws are provided between the cage cube 152 and the precision rotation adjustment table 153 to lock the precision rotation adjustment table 153. In other embodiments, the laser beam combining module 100 may include two five-axis adjustment tables 23, and the two beam combining mirrors 12 are respectively provided on the two five-axis adjustment tables 23.

[0039] In one embodiment, the cage coaxial assembly 15 further includes a second assembly support rod 154, which extends along the first direction and connects the laser and the cage cube 152. The second assembly support rod 154 enables the laser emitter 11 to align with the beam combiner 12 in the cage cube 152. That is, the laser emitted by the laser emitter 11 is irradiated along the first direction, and the laser emitted by the laser emitter 11 away from the collimator 22 is turned to reach the beam combiner 12 close to the collimator 22 after passing through the corresponding beam combiner 12, and the laser emitted by the laser emitter 11 close to the collimator 22 directly reaches the beam combiner 12 close to the collimator 22, and the precision rotary adjustment stage 153 is operated through the spot information detected by the imaging camera 13 to adjust the rotation angle of the beam combiner 12 so that the two laser beams are combined. In other embodiments, the second assembly support rod 154 may not be provided.

[0040] In one embodiment, the high-precision laser detection and coupling device further includes an electric control module, which is electrically connected to the precision rotating adjustment table 153 and the imaging camera 13, so as to be able to intelligently adjust the position of the beam combiner 12 according to the spot image captured by the imaging camera 13. At the same time, the electric control module can also be electrically connected to the mobile module 300, the five-axis adjustment table 23 connected to the collimator 22, and the optical fiber adjustment component. In the first state, according to the spot information detected by the imaging camera 13, the beam combining laser is adjusted through the precision rotating adjustment table 153, the axis adjustment table of the mobile module 300, and the optical fiber adjustment component. In other embodiments, the electric control module may be not provided, and the precision rotating adjustment table 153, the axis adjustment table of the mobile module 300, and the optical fiber adjustment component may be manually operated.

[0041] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-precision laser detection and coupling device, characterized in that: include: A laser beam combining module, the laser beam combining module comprising at least two laser emitters, at least two beam combining mirrors, and an imaging camera, wherein the position of the beam combining mirrors can be adjusted, the beam combining mirrors are arranged in a one-to-one correspondence with the laser emitters, the light beams emitted by the laser emitters are gathered into a combined laser beam through the beam combining mirrors, and the combined laser beam has an installation position in the irradiation direction; The optical fiber coupling module comprises an optical fiber coupler and a collimator, wherein the combined laser beam passes through the collimator and the optical fiber coupler in sequence and is coupled into the optical fiber; A moving module, the imaging camera and the collimating mirror are both installed on the moving module, the moving module can make the imaging camera and the collimating mirror move along a first direction, the first direction is arranged to intersect with the irradiation direction of the combined laser beam, the moving module has a first state and a second state, in the first state, the imaging camera is located at the installation position, and can detect the light spot formed by the combined laser beam on the lens of the imaging camera; in the second state, the collimating mirror is located at the installation position, and can allow the combined laser beam to pass through to couple into the optical fiber.

2. The high-precision laser detection and coupling device according to claim 1, characterized in that: The mobile module includes a transverse movement component, which includes a transverse movement rail and at least one transverse movement platform movably arranged on the transverse movement rail. The transverse movement rail extends along the first direction, the imaging camera and the collimating mirror are arranged on the transverse movement platform, and the transverse movement rail is arranged through the installation position.

3. The high-precision laser detection and coupling device according to claim 2, characterized in that: The transverse moving platform is provided with a stopper at both ends of the transverse moving slide rail. In the first state and the second state, the end of the transverse moving platform away from the installation position abuts against the stopper.

4. The high-precision laser detection and coupling device as claimed in claim 2, characterized in that: The optical fiber coupling module further comprises a five-axis adjustment platform, the collimating mirror is arranged on the five-axis adjustment platform, and the five-axis adjustment platform is arranged on the transverse movement platform.

5. The high-precision laser detection and coupling device as claimed in claim 2, characterized in that: The moving module further includes a translation component, which extends along the irradiation direction of the combined laser beam so as to enable the collimating mirror and the imaging camera to move closer to or farther away from the combined laser beam.

6. The high-precision laser detection and coupling device as claimed in claim 5, characterized in that: The transverse moving platform extends along the irradiation direction of the combined laser beam. The translation assembly is arranged on the transverse moving platform and comprises a translation rail and a translation platform movably arranged on the translation rail. The collimating mirror and the imaging camera are arranged on the translation platform.

7. The high-precision laser detection and coupling device according to claim 1, characterized in that: The optical fiber coupling module further comprises an optical fiber adjustment component, the optical fiber coupler is arranged on the optical fiber adjustment component, and the optical fiber adjustment component is used to move the optical fiber coupler along the irradiation direction of the combined laser beam.

8. The high-precision laser detection and coupling device according to claim 1, characterized in that: The laser beam combining module includes a cage coaxial component, which includes a first assembly support rod, a cage cube, and a precision rotation adjustment table. The cage cube and the precision rotation adjustment table are each provided with a plurality of them, and are each arranged in a one-to-one correspondence with the laser emitter. The precision rotation adjustment table is installed in the cage cube, and the beam combining mirror is arranged on the precision rotation adjustment table. The precision rotation adjustment table is used to adjust the rotation angle of the beam combining mirror. The first assembly support rod extends along a second direction to arrange the plurality of cage cubes along the second direction, and the second direction is arranged to intersect with the first direction.

9. The high-precision laser detection and coupling device according to claim 8, characterized in that: The cage coaxial assembly further includes a second assembly support rod extending along the first direction and connecting the laser transmitter and the cage cube.

10. The high-precision laser detection and coupling device according to claim 8, characterized in that: The high-precision laser detection and coupling device also includes an electric control module, which is electrically connected to the precision rotary adjustment table and the imaging camera so as to be able to intelligently adjust the position of the beam combiner according to the spot image taken by the imaging camera.

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