Laser optical axis debugging device and debugging method

Abstract

The application discloses a laser optical axis debugging device and a debugging method, which comprise a fixing base, a laser generating mechanism, a target plate and a conversion base, the laser generating mechanism is arranged on the fixing base, one end of the laser generating mechanism is formed with a laser emission port, the target plate is arranged in a spaced mode with the laser generating mechanism, a through hole is formed in the middle of the target plate, the center of the through hole is coaxially arranged with the center of the laser emission port, the conversion base is sleeved on one side of the laser generating mechanism close to the laser emission port, and a laser to be debugged is sleeved outside the conversion base. The helium-neon laser and the reflecting mirror of the existing coarse adjustment scheme can be replaced, the formed collimating light path can solve the technical problems of low precision, large debugging difficulty, low stability and reliability of the optical axis of the prior art which are restricted by the site and equipment factors.

Description

Technical Field

[0001] This invention relates to the field of optical device assembly and adjustment technology, and specifically to a laser optical axis adjustment device and adjustment method. Background Technology

[0002] An optical resonant cavity in a laser is an optical cavity composed of two mirrors. Through the reflection effect of the optical resonant cavity, photons can continuously oscillate and amplify within the cavity. When the laser gain is greater than the loss, the laser is output from the output mirror, and the output direction coincides with the optical axis of the resonant cavity. Therefore, the optical axis adjustment of a laser mainly involves the adjustment of the optical axis of its optical resonant cavity. The adjustment of the optical resonant cavity is further divided into coarse adjustment and fine adjustment. This invention is an improvement on the coarse adjustment technique of the optical resonant cavity.

[0003] Traditional coarse adjustment schemes for optical resonators typically involve constructing a collimated optical path using a helium-neon laser and multiple mirrors, with the beam visible. Specifically, one mirror is designated as a reference plane. The laser, containing the optical resonator, is placed between this reference mirror and another mirror. The light returning from this reference plane is used as a reference; if the returned light from the remaining mirrors in the optical path coincides with this reference, then all reflective surfaces in the optical path are considered to be aligned, thus achieving optical resonator straightening. To ensure the collimation of the optical path, it must have a certain length; the longer the path, the smaller the collimation error, requiring a sufficiently large space. However, actual product assembly and adjustment scenarios are often limited by space and equipment constraints, resulting in low accuracy for this coarse adjustment method. Folding the optical path adds more mirrors, further increasing the difficulty of collimating the optical axis and reducing its stability and reliability. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention proposes a laser optical axis adjustment device and method, which can solve the technical problems of low accuracy, high adjustment difficulty, and low stability and reliability of the optical axis in existing optical resonator coarse adjustment schemes due to limitations of site and equipment factors.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a laser optical axis adjustment device, comprising:

[0007] Fixed base:

[0008] A laser generating mechanism is mounted on the fixed base, and a laser emission port is formed at one end of the laser generating mechanism;

[0009] A target plate is provided at a distance from the laser generating mechanism. A through hole is formed in the middle of the target plate, and the center of the through hole is coaxial with the center of the laser emission port.

[0010] A conversion base is fitted onto the side of the laser generating mechanism near the laser emission port, and the laser to be debugged is fitted onto the outside of the conversion base.

[0011] In some embodiments, the laser generating mechanism includes a cylindrical body, a laser module, a battery pack, and a switch. The cylindrical body is a hollow structure with openings at both ends, one of which forms the laser emission port. The laser module, battery pack, and switch are sequentially arranged in the hollow structure from the position closest to the laser emission port to the position furthest from the laser emission port. The laser outlet of the laser module is close to the laser emission port and the two are coaxial.

[0012] The laser module, the battery pack, and the switch are electrically connected.

[0013] In some embodiments, the cylindrical body is composed of a first cylindrical body, a second cylindrical body, and a third cylindrical body connected coaxially in sequence, wherein the diameters of the first cylindrical body, the second cylindrical body, and the third cylindrical body decrease sequentially, and the laser emission port is disposed on the third cylindrical body.

[0014] In some embodiments, a plurality of threaded holes are formed on the second cylinder, the threaded holes are arranged radially along the second cylinder, and an adjusting screw is connected in the threaded hole to adjust the position of the laser module.

[0015] In some embodiments, the laser generating mechanism further includes an end cap disposed on the side of the third cylinder away from the second cylinder, and the contact end of the switch is exposed through the end cap.

[0016] In some embodiments, the conversion base includes a sleeve and a connecting plate. The connecting plate is installed on one side of the sleeve, and the sleeve is sleeved outside the second cylinder and the third cylinder. The laser to be debugged is sleeved outside the sleeve and fixedly connected to the connecting plate.

[0017] In some embodiments, a first mounting cavity and a second mounting cavity are formed coaxially inside the sleeve. The first mounting cavity and the second mounting cavity are respectively matched with the outer circles of the second cylinder and the third cylinder. The connecting plate is installed at the end of the first mounting cavity away from the second mounting cavity, and the connecting plate has a connecting hole for connecting the laser to be debugged.

[0018] In some embodiments, the mounting base includes a V-shaped block and a fixing plate. The V-shaped block has a V-shaped groove in the middle for placing the laser generating mechanism. The two fixing plates are respectively disposed on both sides of the V-shaped block, and each fixing plate has a fixing hole.

[0019] In some embodiments, a spherical mirror is further included, which is disposed between the laser generating mechanism and the target plate, and the focal point of the spherical mirror is on the same straight line as the center of the through hole.

[0020] Secondly, the present invention also provides a laser optical axis adjustment method, which is based on the laser optical axis adjustment device provided in the first aspect of the present invention, and specifically includes the following steps:

[0021] S1, Install the laser generator on the fixed base;

[0022] S2, place the target plate at a certain distance in front of the side of the laser generating mechanism where the laser emission port is formed;

[0023] S3, Adjust the position of the laser emission port so that it is aligned with the center of the through hole in the target plate;

[0024] S4, Connect the conversion base to the side of the laser generating mechanism near the laser emission port, and then put the laser to be debugged onto the conversion base;

[0025] S5. Adjust the position of the optical resonant cavity in the laser so that the laser emitted by it coincides with the laser emitted by the laser generating mechanism, thus completing the optical axis adjustment of the laser.

[0026] Compared with existing technologies, the laser optical axis adjustment device and method provided by this invention replace the helium-neon laser and multiple mirrors in the existing optical resonator coarse adjustment scheme. The adjustment device, composed of a laser generating mechanism and a target plate with through holes, can form a collimated optical path for adjustment. It has lower site requirements, and most sites can meet the requirements, so there is no need for turning, which greatly improves the adjustment accuracy. At the same time, the adjustment device provided by this invention has fewer components, simple structure, and is easy to operate and carry. It can be operated by simply changing the conversion base for different laser products, and has a wider range of applications. Attached Figure Description

[0027] Figure 1 This is a structural diagram of an existing laser optical axis adjustment device;

[0028] Figure 2 This is an overall layout diagram of the laser optical axis adjustment device described in this invention;

[0029] Figure 3This is a cross-sectional view of the laser generating mechanism described in this invention;

[0030] Figure 4 This is a cross-sectional view of the conversion seat described in this invention;

[0031] Figure 5 This is a schematic diagram of the structure of the conversion seat of the present invention installed in the laser generating mechanism;

[0032] Figure 6 This is a schematic diagram of the laser to be debugged being installed and connected to the laser generating mechanism via a conversion base according to the present invention;

[0033] Figure 7 This is a flowchart of the laser optical axis adjustment method described in this invention.

[0034] The annotations in the attached figures are explained as follows:

[0035] 100. Fixing base; 110. V-block; 120. Fixing plate; 121. Fixing hole;

[0036] 200. Laser generating mechanism; 201. Laser emission port; 210. Cylinder; 211. First cylinder; 212. Second cylinder; 2121. Threaded hole; 2122. Adjusting screw; 213. Third cylinder; 220. Laser module; 230. Battery pack; 240. Switch; 250. End cap.

[0037] 300, target plate; 301, through hole;

[0038] 400, conversion seat; 410, sleeve; 411, first mounting cavity; 412, second mounting cavity; 420, connecting plate; 421, connecting hole;

[0039] 500. Laser to be debugged;

[0040] 600. Coarse adjustment device; 610. Helium-neon laser; 620. First reflector; 630. Second reflector; 640. Third reflector; 650. Fourth reflector. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Existing coarse adjustment devices 600 for optical resonators typically consist of a helium-neon laser 610 and multiple mirrors, such as... Figure 1As shown, with the first reflector 620 as the reference mirror, the laser beam emitted by the helium-neon laser 610, after being reflected by the second reflector 630, the third reflector 640, the fourth reflector 650, and the first reflector 620, finally returns along its original path to the second reflector 630. The reflected light spot in the second reflector 630 coincides with the incident light spot, thus forming a collimated optical path. The laser 500 to be adjusted is placed between the first reflector 620 and the fourth reflector 650 for coarse adjustment of the laser 500. However, this coarse adjustment method is often limited by space constraints. The reflectors need to be folded and arranged, which not only increases the number of reflectors and the difficulty of collimating the optical axis, but also reduces the stability and reliability of the optical axis. As is well known, in order to ensure the collimation of the collimated optical path formed by the helium-neon laser 610 and the reflector group, the optical path must have a certain length. The longer the optical path, the smaller the collimation error. Therefore, the existing coarse adjustment scheme has the problems of large space occupation and low adjustment accuracy.

[0043] To address the aforementioned technical problems, this invention provides a laser optical axis adjustment device and method that can replace the collimated optical path constructed by a helium-neon laser 610 and multiple mirrors.

[0044] like Figure 2 As shown, in a first aspect, the present invention provides a laser optical axis adjustment device, including a fixed base 100, a laser generating mechanism 200, a target plate 300, and a conversion base 400. The laser generating mechanism 200 is disposed on the fixed base 100, and a laser emission port 201 is formed at one end of the laser generating mechanism 200. The target plate 300 is spaced apart from the laser generating mechanism 200, and a through hole 301 is formed in the middle of the target plate 300. The center of the through hole 301 is coaxially arranged with the center of the laser emission port 201. The conversion base 400 is sleeved on the side of the laser generating mechanism 200 near the laser emission port 201, and the laser 500 to be adjusted is sleeved on the outside of the conversion base 400.

[0045] This invention enables the formation of a collimated optical path using the laser generating mechanism 200 and the target plate 300. Compared with existing coarse adjustment schemes, this invention has lower site requirements, and most sites can meet the requirements, thus eliminating the need for turning and greatly improving the adjustment accuracy. In addition, after the collimated optical path adjustment is completed, the laser to be adjusted 500 can be installed on the laser generating mechanism 200 through the conversion seat 400 to complete the adjustment of the two reflectors of the optical resonant cavity. When the model of the laser to be adjusted 500 changes, the matching conversion seat 400 can be replaced to install different models of lasers 500 on the laser generating mechanism 200, which has the advantage of strong versatility.

[0046] In one embodiment, such as Figure 3As shown, the laser generating mechanism 200 includes a cylindrical body 210, a laser module 220, a battery pack 230, and a switch 240. The cylindrical body 210 is a hollow structure with openings at both ends, one of which forms the laser emission port 201. The laser module 220, the battery pack 230, and the switch 240 are arranged sequentially in the hollow structure from the position closest to the laser emission port 201 to the position furthest from the laser emission port 201. The laser outlet of the laser module 220 is close to the laser emission port 201 and the two are coaxial. The laser module 220, the battery pack 230, and the switch 240 are electrically connected.

[0047] In the above technical solution, after the switch 240 is turned on, the laser module 220 emits a laser under the premise that the battery pack 230 provides power, and the laser is emitted to the target plate 300 through the laser emission port 201.

[0048] In one embodiment, the cylinder 210 is composed of a first cylinder 211, a second cylinder 212, and a third cylinder 213 connected coaxially in sequence, with the diameters of the first cylinder 211, the second cylinder 212, and the third cylinder 213 decreasing sequentially, and the laser emission port 201 is disposed on the third cylinder 213.

[0049] In the above technical solution, the first cylinder 211, the second cylinder 212 and the third cylinder 213 are integrally formed structures, which are processed by high-precision machine tools and have high coaxiality, which is conducive to improving debugging accuracy.

[0050] In one embodiment, a plurality of threaded holes 2121 are formed on the second cylinder 212. The threaded holes 2121 are arranged radially along the second cylinder 212. An adjusting screw 2122 is connected to the threaded hole 2121 to adjust the position of the laser module 220.

[0051] In the above technical solution, the laser generating mechanism 200 is mounted on the fixed base 100. Rotating the cylinder 210 allows the light spot emitted by the laser module 220 to move in a circular motion on the target plate 300. The size of the light spot's trajectory can be adjusted by turning the adjusting screw 2122. When the trajectory of the light spot is roughly equal to its own size, the collimation of the optical path is complete. Theoretically, the greater the distance between the target plate 300 and the laser generating mechanism 200, the smaller the divergence angle and the better the collimation of the resulting collimated optical path. In practice, this distance can be adjusted according to actual needs to achieve the required accuracy. For example, when the distance between the laser generating mechanism 200 and the target plate 300 is 10m, the radius of the light spot's trajectory on the target plate 300 is 2mm, and the axial deflection angle of the collimated optical path is 0.2mrad.

[0052] In one embodiment, the laser generating mechanism 200 further includes an end cap 250, which is disposed on the side of the third cylinder 213 away from the second cylinder 212, and the contact end of the switch 240 is exposed through the end cap 250.

[0053] In one embodiment, such as Figure 4-6 As shown, the conversion base 400 includes a sleeve 410 and a connecting plate 420. The connecting plate 420 is installed on one side of the sleeve 410. The sleeve 410 is sleeved outside the second cylinder 212 and the third cylinder 213. The laser to be debugged 500 is sleeved outside the sleeve 410 and fixedly connected to the connecting plate 420.

[0054] In one embodiment, the sleeve 410 has a first mounting cavity 411 and a second mounting cavity 412 coaxially arranged inside. The first mounting cavity 411 and the second mounting cavity 412 are respectively matched with the outer circles of the second cylinder 212 and the third cylinder 213. The connecting plate 420 is installed at the end of the first mounting cavity 411 away from the second mounting cavity 412, and the connecting plate 420 has a connecting hole 421 for connecting the laser to be debugged 500.

[0055] In one embodiment, the fixing base 100 includes a V-shaped block 110 and a fixing plate 120. The V-shaped block 110 has a V-shaped groove in the middle for placing the laser generating mechanism 200. The two fixing plates 120 are respectively disposed on both sides of the V-shaped block 110, and each fixing plate 120 has a fixing hole 121.

[0056] In one embodiment, a spherical mirror (not shown) is also included, which is disposed between the laser generating mechanism 200 and the target plate 300, and the focal point of the spherical mirror is on the same straight line as the center of the through hole 301.

[0057] Secondly, such as Figure 7 As shown, the present invention provides a laser optical axis adjustment method, which is implemented based on the laser optical axis adjustment device provided in the first aspect of the present invention, and specifically includes the following steps:

[0058] S1, Install the laser generating mechanism 200 on the fixed base 100;

[0059] S2, the target plate 300 is placed at a certain distance in front of the side of the laser generating mechanism 200 where the laser emission port 201 is formed;

[0060] S3, adjust the position of the laser emission port 201 so that it is aligned with the center of the through hole 301 of the target plate 300;

[0061] Specifically, the laser generating mechanism 200 is installed on the fixed base 100, and the cylinder 210 is rotated. At this time, the light spot emitted by the laser module 220 can be seen to move in a circle on the target plate 300. Then, the size of the light spot's trajectory can be adjusted by turning the adjusting screw 2122. When the movement trajectory of the light spot is adjusted to be comparable to the size of the light spot itself, the adjustment of the collimated optical path is completed.

[0062] S4, connect the conversion base 400 to the side of the laser generating mechanism 200 near the laser emission port 201, and then put the laser 500 to be debugged on the conversion base 400.

[0063] S5. Adjust the position of the optical resonant cavity in the laser 500 so that the laser emitted by it coincides with the laser emitted by the laser generating mechanism 200, thereby completing the optical axis adjustment of the laser 500.

[0064] In summary, the laser optical axis adjustment device and method provided by this invention replace the helium-neon laser and multiple mirrors in the existing optical resonator coarse adjustment scheme. The adjustment device, composed of a laser generating mechanism and a target plate with through holes, can form a collimated optical path for adjustment. It has low site requirements, and most sites can meet the requirements, so there is no need for turning, which greatly improves the adjustment accuracy. At the same time, the adjustment device provided by this invention has fewer components, a simple structure, and is easy to operate and carry. It can be operated by simply changing the conversion base for different laser products, and has a wider range of applications.

[0065] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A laser optical axis adjustment device, characterized in that, The laser optical axis adjustment device is used to achieve coarse adjustment of the optical resonator, including: Fixed base: A laser generating mechanism is mounted on the fixed base, and a laser emission port is formed at one end of the laser generating mechanism; A target plate is provided at a distance from the laser generating mechanism. A through hole is formed in the middle of the target plate, and the center of the through hole is coaxial with the center of the laser emission port. A conversion base is fitted onto the side of the laser generating mechanism near the laser emission port, and the laser to be debugged is fitted onto the outside of the conversion base; wherein, The laser generating mechanism includes a cylindrical body, a laser module, a battery pack, and a switch. The cylindrical body is a hollow structure with openings at both ends, with one end forming the laser emission port. The laser module, battery pack, and switch are arranged sequentially in the hollow structure from the position closest to the laser emission port to the position furthest from the laser emission port. The laser outlet of the laser module is close to the laser emission port, and the two are coaxial. The laser module, the battery pack, and the switch are electrically connected. The cylindrical body is composed of a first cylindrical body, a second cylindrical body, and a third cylindrical body connected coaxially in sequence. The diameters of the first cylindrical body, the second cylindrical body, and the third cylindrical body decrease sequentially. The laser emission port is located on the third cylindrical body. Multiple threaded holes are formed on the second cylindrical body. The threaded holes are arranged radially along the second cylindrical body. Adjusting screws are connected to the threaded holes to adjust the position of the laser module. The conversion base includes a sleeve and a connecting plate. The connecting plate is installed on one side of the sleeve. The sleeve is sleeved outside the second cylinder and the third cylinder. The laser to be debugged is sleeved outside the sleeve and fixedly connected to the connecting plate. The mounting base includes a V-shaped block and a fixing plate. The V-shaped block has a V-shaped groove in the middle for placing the laser generating mechanism. The two fixing plates are respectively disposed on both sides of the V-shaped block, and each fixing plate has a fixing hole.

2. The laser optical axis adjustment device according to claim 1, characterized in that, The laser generating mechanism also includes an end cap, which is disposed on the side of the third cylinder away from the second cylinder, and the contact end of the switch is exposed through the end cap.

3. The laser optical axis adjustment device according to claim 2, characterized in that, The sleeve has a first mounting cavity and a second mounting cavity coaxially arranged inside. The first mounting cavity and the second mounting cavity are respectively matched with the outer circles of the second cylinder and the third cylinder. The connecting plate is installed at the end of the first mounting cavity away from the second mounting cavity, and the connecting plate has a connecting hole for connecting the laser to be debugged.

4. The laser optical axis adjustment device according to claim 1, characterized in that, It also includes a spherical mirror, which is disposed between the laser generating mechanism and the target plate, and the focal point of the spherical mirror and the center of the through hole are on the same straight line.

5. A laser optical axis adjustment method, implemented based on the laser optical axis adjustment device according to any one of claims 1-4, characterized in that, Includes the following steps: S1, Install the laser generator on the fixed base; S2, place the target plate at a certain distance in front of the side of the laser generating mechanism where the laser emission port is formed; S3, Adjust the position of the laser emission port so that it is aligned with the center of the through hole in the target plate; S4, Connect the conversion base to the side of the laser generating mechanism near the laser emission port, and then put the laser to be debugged onto the conversion base; S5. Adjust the position of the optical resonant cavity in the laser so that the laser emitted by it coincides with the laser emitted by the laser generating mechanism, thus completing the optical axis adjustment of the laser.

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