Multifunctional light beam quality measuring platform

Abstract

The utility model belongs to the field of laser measuring devices, and particularly relates to a multifunctional light beam quality measuring platform which comprises a supporting assembly, a laser generating assembly, a light beam quality measuring instrument and a laser receiver, the laser generating assembly, the light beam quality measuring instrument and the laser receiver are arranged on the supporting assembly, and the laser generating assembly comprises a laser generator, a beam expander, a galvanometer and a field lens which are sequentially arranged; when the light beam is measured, the output port of the field lens, the probe of the light beam quality measuring instrument and the input port of the laser receiver are sequentially located on the same axis. According to the utility model, the beam expander, the galvanometer and the field lens are matched with one another, so that the laser generated by the laser generator can be accurately focused on the probe of the light beam quality measuring instrument all the time, and the measurement accuracy of the light beam quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of light beam measurement, and in particular relates to a multifunctional light beam quality measurement platform. Background Art

[0002] In today's society, laser technology has penetrated into many fields, from precise medical operations to information transmission in high-speed communications to high-tech weapons in military defense. Lasers are everywhere. In order to ensure that the laser can still maintain sufficient energy intensity after long-distance transmission and meet the stringent requirements of various application scenarios, it is crucial to increase the laser energy. However, simply increasing the energy is not enough to solve the problem, because the development of high-energy lasers is also accompanied by higher expectations for the transmission efficiency of laser beams. Therefore, laser beam quality has become one of the key indicators for measuring the performance of laser systems, which is directly related to whether the laser energy can be effectively delivered to the target area.

[0003] Traditional beam quality test equipment usually consists of a laser generator, an aperture assembly, and a laser receiving assembly. The laser generator, as the core light source, is responsible for generating the laser beam to be tested; the aperture assembly controls and shapes the beam profile by fixing and adjusting the aperture, affecting the beam quality; and the laser receiving assembly integrates a high-sensitivity detector, such as a photodiode or a thermopile, to accurately measure the original power of the laser and the light-blocking power after the aperture. This test process indirectly evaluates the central energy concentration of the beam and the light intensity distribution at its edge by comparing the original power with the light-blocking power, thereby judging the overall quality of the beam.

[0004] However, the traditional artificial aperture test method has significant limitations. Its quality assessment cannot involve more complex and detailed parameters, such as the spot size after focusing, energy density distribution, and focal position.

[0005] Therefore, for those skilled in the art, how to improve the measurement accuracy of beam quality is a technical problem that needs to be solved urgently. Utility Model Content

[0006] The utility model aims to provide a multifunctional beam quality measurement platform to solve the technical problems of low beam quality measurement accuracy in the prior art:

[0007] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0008] A multifunctional beam quality measurement platform comprises: a support component, and a laser generating component, a beam quality measuring instrument and a laser receiver arranged on the support component, wherein the laser generating component comprises a laser generator, a beam expander, a galvanometer and a field mirror arranged in sequence;

[0009] When measuring the light beam, the output port of the field lens, the probe of the beam quality measuring instrument, and the input port of the laser receiver are sequentially located on the same axis.

[0010] Preferably, the support assembly includes a vertically arranged lifting mechanism, on which the laser generating assembly is arranged. The laser generating assembly, the beam quality measuring instrument, and the laser receiver are arranged in sequence from top to bottom in the vertical direction.

[0011] Preferably, a flange bottom plate that moves relatively in the vertical direction of the lifting mechanism is provided on the lifting mechanism. A flange is provided on the flange bottom plate, and the flange fixes the galvanometer. An expander is connected between the laser generator and the galvanometer, and the bottom surface of the galvanometer is connected to the field lens.

[0012] Preferably, a gripper is further provided on the flange bottom plate, and the gripper fixes the laser generator.

[0013] Preferably, the flange and the galvanometer are connected by a positioning pin.

[0014] Preferably, the lifting mechanism includes a first linear guide rail, a first slider, a first motor, a first coupling, a first screw rod, and a first nut;

[0015] The first motor is fixedly arranged, the output shaft of the first motor is connected to one end of the first screw rod through the first coupling, the other end of the first screw rod passes through the first nut, the first nut is located in the first linear guide rail, and the first slider is fixed on the flange bottom plate and is slidably matched with the first linear guide rail.

[0016] Preferably, a scale is arranged along the axial direction on the outside of the first linear guide rail.

[0017] Preferably, there are at least two groups of the laser generating assemblies arranged side by side. The support assembly further includes a horizontally arranged horizontal moving mechanism, on which a transfer platform is slidably arranged. The beam quality measuring instrument and the laser receiver are respectively arranged on the transfer platform.

[0018] Preferably, the horizontal moving mechanism includes a second linear guide rail, a second slider, a second motor, a second coupling, a second screw rod, and a second nut. The second motor is fixedly arranged, the output shaft of the second motor is connected to one end of the second screw rod through the second coupling, the other end of the second screw rod passes through the second nut, the second nut is located in the second linear guide rail, and the second slider is fixed on the bottom surface of the transfer platform and is slidably matched with the second linear guide rail.

[0019] Preferably, both the expander and the galvanometer are connected to the water cooling assembly.

[0020] The utility model has the following effects:

[0021] Through the mutual cooperation among the beam expander, the galvanometer scanner and the field lens, it is ensured that the laser generated from the laser generator can always be correctly focused on the receiving plane of the beam quality measuring instrument, thereby improving the measurement accuracy of the beam quality;

[0022] By setting the lifting mechanism, the laser generator can move along the vertical direction, thereby realizing a laser generator suitable for various lengths of tail cables.

[0023] By setting the horizontal moving mechanism, the beam quality measuring instrument can move to measure the beam quality of the laser generators of multiple laser generating components. Description of the Drawings

[0024] Figure 1 It is the front view of the overall structure of the utility model;

[0025] Figure 2 It is the back view of the overall structure of the utility model;

[0026] Reference Numerals: 1, optical platform; 2, lifting mechanism; 3, laser generator; 4, holder; 5, beam expander; 6, galvanometer scanner; 7, field lens; 8, beam quality measuring instrument; 9, horizontal moving mechanism; 10, laser receiver; 11, adapter platform; 12, flange bottom plate; 13, flange. Detailed Embodiment

[0027] In order to better understand the purpose, structure and function of the utility model, the following further detailed description of the utility model will be made with reference to the drawings.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0029] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] The utility model discloses a multifunctional beam quality measurement platform, comprising: a support assembly, and a laser generating assembly, a beam quality measuring instrument 8 and a laser receiver 10 arranged on the support assembly. The laser generating assembly comprises a laser generator 3, a beam expander 5, a galvanometer 6 and a field lens 7 arranged in sequence. The output port of the laser generator 3 is connected to the input port of the beam expander 5. The output port of the beam expander 5 is connected to the input port of the galvanometer 6. The output port of the galvanometer 6 is connected to the input port of the field lens 7. When measuring the beam, the output port of the field lens 7, the probe of the beam quality measuring instrument 8 and the input port of the laser receiver 10 are sequentially located on the same axis. Among them, the laser generator 3 is used to emit a laser beam; the beam expander 5 is used to expand the diameter of the laser beam and reduce the beam divergence angle; the galvanometer 6 is a galvanometer 6 for rapid beam orientation and scanning; the field lens 7 is used to maintain the depth of focus and focusing quality; the beam quality measuring instrument 8 is used to measure the beam quality M 2 , the radius of the focused spot, the beam divergence angle, the shape spot parameters and the thermal focal shift; through the mutual cooperation among the beam expander 5, the galvanometer 6 and the field lens 7 in this technical solution, it is used to ensure that the laser generated from the laser generator 3 can always be correctly focused on the probe of the beam quality measuring instrument 8, and improve the measurement accuracy of the beam quality.

[0031] Furthermore, since the tail cable lengths of the current different laser generators 3 are inconsistent, and the diaphragm test method is tested manually, due to the limitations of manual work and space, it is difficult for the prior art to adapt to laser generators 3 with different tail cable lengths. To solve the above problems, the support assembly of the present technical solution includes an optical platform 1 and a lifting mechanism 2. The optical platform 1 is horizontally arranged, the lifting mechanism 2 is vertically arranged on the optical platform 1, and the laser generating assembly is arranged on the lifting mechanism 2. The laser assembly, the beam quality measuring instrument 8, and the laser receiver 10 are arranged in sequence from top to bottom in the vertical direction. Specifically, the lifting mechanism 2 is provided with a flange bottom plate 12 that moves relatively in the vertical direction of the lifting mechanism 2. A flange 13 and a clamp 4 are arranged on the flange bottom plate 12. The flange 13 fixes the galvanometer 6, and the clamp 4 fixes the laser generator 3 on one side of the galvanometer 6. An expander 5 is connected between the laser generator 3 and the galvanometer 6. The bottom surface of the galvanometer 6 is connected to the field lens 7. The beam quality measuring instrument 8 and the laser receiver 10 are located below the field lens 7. To ensure that the output port of the field lens 7 arranged on the galvanometer 6 is perpendicular to the plane of the optical platform 1 and is on the same vertical axis as the probe of the beam quality measuring instrument 8 and the input port of the laser receiver 10, the flange 13 and the galvanometer 6 are connected by a positioning pin, and the galvanometer angle is adjusted by the action of the positioning pin. Among them, the clamp 4 can be used to clamp laser generators of different models, and the lifting mechanism 2 can be any mechanism that can adjust the height. Most preferably, the lifting mechanism 2 includes a first linear guide rail, a first slider, a first motor, a first coupling, a first screw rod, and a first nut; the first motor is fixedly arranged on the optical platform 1, the output shaft of the first motor is connected to one end of the first screw rod through the first coupling, the first screw rod passes through the first nut, the first nut is located in the first linear guide rail, and the first slider is fixed on the flange bottom plate 12 and is slidably matched with the first linear guide rail; when lifting is required, the first motor drives the first screw rod to rotate, and the first nut drives the first slider to slide up and down along the first linear guide rail. In addition, to further improve the adjustment accuracy, a scale is arranged along the axial direction on the outside of the first linear guide rail for accurately adjusting the height of the laser generator 3. Compared with the prior art, the vertical arrangement of the lifting mechanism 2 in the present technical solution enables the cable of the laser generator 3 to be lifted in the vertical direction, thereby adapting to laser generators 3 with different tail cable lengths while reducing labor costs and space occupancy rates.

[0032] Furthermore, since the current aperture test method tests the laser generators 3 one by one manually, the prior art cannot test multiple laser generators 3, resulting in low test efficiency. To solve the above problems, at least two sets of the lifting mechanism 2 and the laser generating assembly provided on the lifting mechanism 2 are provided, and the lifting mechanisms 2 are arranged side by side to adapt to the multiple laser generators 3. The support assembly further includes a horizontal movement mechanism 9 horizontally arranged on the optical platform 1. A transfer platform 11 is slidably arranged on the horizontal movement mechanism 9. The beam quality measuring instrument 8 and the laser receiver 10 are respectively arranged on the top surface and the side surface of the transfer platform 11, so that the beam quality measuring instrument 8 and the laser receiver 10 can move simultaneously. The beam quality measuring instrument 8 measures the beam quality of multiple laser generators 3 by moving on the horizontal movement mechanism 9, effectively shortening the working hours for measuring the beam quality of beams with different spot diameters and avoiding errors caused by manual measurement of the beam quality through beam splitting operations. Among them, the horizontal movement mechanism 9 includes a second linear guide rail, a second slider, a second motor, a second coupling, a second screw rod, and a second nut; the second motor is fixedly arranged on the optical platform 1, the output shaft of the second motor is connected to one end of the second screw rod through the second coupling, the second screw rod passes through the second nut, the second nut is located in the second linear guide rail, and the second slider is fixed on the bottom surface of the transfer platform 11 and is slidably matched with the second linear guide rail; when horizontal movement is required, the second motor drives the second screw rod to rotate, and the second nut drives the second slider to slide horizontally along the second linear guide rail.

[0033] Furthermore, both the beam expander and the galvanometer are connected to the water cooling component to protect the equipment and extend its service life.

[0034] The usage method of this technical solution is as follows:

[0035] When measuring the beam quality, the laser generator 3 is placed in the laser generator 3 holder 4. By adjusting the height of the lifting table surface of the lifting mechanism 2 to adapt to the laser generators 3 with various tail cable lengths, the laser emitted by the laser generator 3 is expanded by the beam expander 5, reflected by the galvanometer 6, and focused by the field lens 7 to finally output a beam with the required size. The output beam passes through the beam quality measuring instrument 8 and is finally received by the laser receiver.

[0036] When it is necessary to measure the beam quality of lasers with multiple different spot sizes, the required laser generator 3 is placed on the corresponding holder 4, and the beam quality measuring instrument 8 arranged on the horizontal movement mechanism 9 is moved to the lower part of the corresponding field lens 7 to measure the beam quality of beams with different spot sizes.

[0037] It can be seen that through the mutual cooperation among the beam expander 5, the galvanometer scanner 6, and the field lens 7, the present utility model ensures that the laser generated from the laser generator 3 can always be correctly focused on the probe of the beam quality measuring instrument 8, thereby improving the measurement accuracy of the beam quality. By providing the lifting mechanism 2, the laser generator 3 can be moved in the vertical direction, so as to adapt to the laser generator 3 with various lengths of tail cables. By providing the horizontal movement mechanism 9, the beam quality measuring instrument 8 can be moved to measure the beam quality of multiple groups of laser generators 3.

[0038] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A multifunctional beam quality measurement platform, characterized in that: The invention comprises: a support component, and a laser generating component, a beam quality measuring instrument (8), and a laser receiver (10) arranged on the support component, wherein the laser generating component comprises a laser generator (3), a beam expander (5), a galvanometer (6), and a field lens (7) arranged in sequence; When measuring the light beam, the output port of the field lens (7), the probe of the light beam quality measuring instrument (8), and the input port of the laser receiver (10) are sequentially located on the same axis.

2. A multifunctional beam quality measurement platform according to claim 1, characterized in that: The support assembly comprises a vertically arranged lifting mechanism (2), on which the laser generating assembly is arranged, and the laser generating assembly, the beam quality measuring instrument (8), and the laser receiver (10) are arranged in sequence from top to bottom along the vertical direction.

3. The multifunctional beam quality measurement platform according to claim 2, characterized in that: The lifting mechanism (2) is provided with a flange base plate (12), the flange base plate (12) is provided with a flange (13), the flange (13) fixes the galvanometer (6), the beam expander (5) is connected between the laser generator (3) and the galvanometer (6), and the bottom surface of the galvanometer (6) is connected to the field mirror (7).

4. The multifunctional beam quality measurement platform according to claim 3, characterized in that: A clamp (4) is also provided on the flange bottom plate (12), and the clamp (4) fixes the laser generator (3).

5. The multifunctional beam quality measurement platform according to claim 4, characterized in that: The flange (13) and the galvanometer (6) are connected via a positioning pin.

6. The multifunctional beam quality measurement platform according to claim 5, characterized in that: The lifting mechanism (2) comprises a first linear guide rail, a first slider, a first motor, a first coupling, a first screw rod, and a first nut; The first motor is fixedly arranged, and the output shaft of the first motor is connected to one end of the first screw through a first coupling, and the other end of the first screw passes through the first nut, and the first nut is located in the first linear guide rail. The first sliding block is fixed on the flange (13) base plate (12) and slidably cooperates with the first linear guide rail.

7. The multifunctional beam quality measurement platform according to claim 6, characterized in that: A scale is arranged on the outer side of the first linear guide rail along its axial direction.

8. A multifunctional beam quality measurement platform according to any one of claims 1 to 7, characterized in that: The laser generating components are at least two groups and are arranged side by side. The supporting component also includes a horizontally arranged horizontal moving mechanism (9), a transfer platform (11) is slidably arranged on the horizontal moving mechanism (9), and the beam quality measuring instrument (8) and the laser receiver (10) are respectively arranged on the transfer platform (11).

9. The multifunctional beam quality measurement platform according to claim 8, characterized in that: The horizontal moving mechanism (9) comprises a second linear guide rail, a second slider, a second motor, a second coupling, a second screw rod, and a second nut. The second motor is fixedly arranged. The output shaft of the second motor is connected to one end of the second screw rod via a second coupling. The other end of the second screw rod passes through the second nut. The second nut is located in the second linear guide rail. The second slider is fixed to the bottom surface of the transfer platform (11) and is slidably matched with the second linear guide rail.

10. The multifunctional beam quality measurement platform according to claim 1, characterized in that: The beam expander and the galvanometer are both connected to a water cooling assembly.

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