Debugging device and debugging method for optical axis of laser

Abstract

The invention discloses a laser optical axis debugging device and method, and the device comprises a fixed seat, a laser generation mechanism, a target plate and a conversion seat, the laser generation mechanism is disposed on the fixed seat, one end of the laser generation mechanism is provided with a laser emission port, and the target plate and the laser generation mechanism are disposed at an interval. A through hole is formed in the middle of the target plate, the center of the through hole and the center of the laser emission port are coaxially arranged, the conversion base is arranged on the side, close to the laser emission port, of the laser generation mechanism in a sleeving mode, and a laser to be debugged is arranged outside the conversion base in a sleeving mode. According to the invention, a helium-neon laser and a reflector in an existing coarse tuning scheme can be replaced, and a formed collimation light path can solve the technical problems of low precision, high debugging difficulty and low stability and reliability of an optical axis due to limitation of field and equipment factors in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of optical device assembly and adjustment, and in particular to a laser optical axis adjustment device and an adjustment method. Background Art

[0002] The optical resonant cavity in the laser refers to an optical cavity composed of two front and rear reflectors. Through the reflection of the optical resonant cavity, photons can continuously oscillate and amplify in the cavity. When the laser gain is greater than the loss, the laser is output by the output mirror and the output direction coincides with the optical axis direction of the resonant cavity. Therefore, the optical axis debugging of the laser is mainly the optical axis adjustment of its optical resonant cavity, and the adjustment of the optical resonant cavity is divided into coarse adjustment and fine adjustment. The present invention is an improvement on the coarse adjustment technology of the optical resonant cavity.

[0003] The traditional optical resonant cavity coarse adjustment scheme is generally a collimated optical path built by a helium-neon laser and multiple reflectors, and its light beam is visible; specifically, one of the reflectors is first designated as the reference surface, and then the laser with the optical resonant cavity is placed between the reflector of the reference surface and another reflector, and the light returned by the emitted helium-neon laser from the reference surface is used as the reference. If the return light of the remaining mirrors in the optical path coincides with it, it can be considered that all the mirror reflective surfaces in the optical path coincide with each other, that is, the straightening of the optical resonant cavity is achieved. In order to ensure the collimation of the collimated optical path, the collimated optical path must have a certain length. The longer the optical path, the smaller the collimation error, that is, a sufficiently large site is required. However, the actual product assembly and adjustment scene is often limited by site and equipment factors and cannot provide a large space, resulting in low precision of this coarse adjustment method; and if the optical path is folded, reflectors will be added, which will increase the difficulty of debugging the collimated optical axis and reduce the stability and reliability of the optical axis. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present invention proposes a laser optical axis debugging device and debugging method, which can solve the technical problems that the existing optical resonant cavity coarse adjustment scheme is restricted by site and equipment factors, has low accuracy, is difficult to debug, and has low stability and reliability of the optical axis.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a laser optical axis debugging device, comprising: Fixed seat: A laser generating mechanism, wherein the laser generating mechanism is disposed on the fixing seat and a laser emitting port is formed at one end of the laser generating mechanism; A target plate, wherein the target plate is spaced apart 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 coaxially arranged with the center of the laser emitting port; A conversion seat is sleeved on a side of the laser generating mechanism close to the laser emitting port, and the laser to be debugged is sleeved on the outside of the conversion seat.

[0006] In some embodiments, the laser generating mechanism includes a cylinder, a laser module, a battery pack and a switch. The cylinder is a hollow structure with openings at both ends, wherein the opening at one end forms the laser emission port. The laser module, the battery pack and the switch are sequentially arranged in the hollow structure from a position close to the laser emission port to a position far from the laser emission port. The laser outlet of the laser module is close to the laser emission port and the two are coaxial. Wherein, the laser module, the battery pack and the switch are electrically connected.

[0007] In some embodiments, the cylinder is composed of a first cylinder, a second cylinder and a third cylinder coaxially connected in sequence, the diameters of the first cylinder, the second cylinder and the third cylinder decrease in sequence, and the laser emission port is arranged on the third cylinder.

[0008] In some embodiments, a plurality of threaded holes are formed on the second cylinder, and the threaded holes are arranged along the radial direction of the second cylinder. Adjustment screws are connected in the threaded holes to adjust the position of the laser module.

[0009] In some embodiments, the laser generating mechanism further includes an end cover, which is disposed on a side of the third cylinder away from the second cylinder, and a touch end of the switch is exposed from the end cover.

[0010] In some embodiments, the conversion seat includes a sleeve and a connecting plate, the connecting plate is installed on one side of the sleeve, the sleeve is sleeved on the outside of the second cylinder and the third cylinder, and the laser to be debugged is sleeved on the outside of the sleeve and fixedly connected to the connecting plate.

[0011] In some embodiments, a first mounting cavity and a second mounting cavity are coaxially formed inside the sleeve, and the first mounting cavity and the second mounting cavity respectively match the outer circles of the second cylinder and the third cylinder, and the connecting plate is installed at one end of the first mounting cavity away from the second mounting cavity, and a connecting hole for connecting the laser to be debugged is formed on the connecting plate.

[0012] In some embodiments, the fixing seat includes a V-shaped block and a fixing plate, a V-shaped groove for placing the laser generating mechanism is formed in the middle of the V-shaped block, two fixing plates are respectively arranged on both sides of the V-shaped block, and each fixing plate is formed with a fixing hole.

[0013] In some embodiments, a spherical mirror is further included, and the spherical mirror is arranged between the laser generating mechanism and the target plate, and the focus of the spherical mirror and the center of the through hole are located on the same straight line.

[0014] In a second aspect, the present invention further provides a laser optical axis debugging method, which is implemented based on the laser optical axis debugging device provided in the first aspect of the present invention, and specifically includes the following steps: S1, install the laser generating mechanism on the fixed seat; S2, placing the target plate at a certain distance in front of the laser generating mechanism on the side where the laser emission port is formed; S3, adjusting the position of the laser emission port so that it is in the same straight line as the center of the through hole of the target plate; S4, sleeve the conversion seat on the side of the laser generating mechanism close to the laser emission port, and then sleeve the laser to be debugged on the conversion seat; S5, adjusting the position of the optical resonant cavity in the laser so that the laser light emitted by the laser coincides with the laser light emitted by the laser generating mechanism, thus completing the optical axis adjustment of the laser.

[0015] Compared with the prior art, the laser optical axis debugging device and debugging method provided by the present invention replace the helium-neon laser and multiple reflectors in the existing optical resonant cavity coarse adjustment scheme. The debugging device composed of a laser generating mechanism and a target plate with a through hole can form a collimated optical path for debugging, and has low requirements on the site. Generally, the site can meet the requirements, so there is no need for folding, which greatly improves the debugging accuracy. At the same time, the debugging device provided by the present invention has fewer components, a simple structure, and is easy to operate and carry. It can be operated by simply replacing the conversion seat for different laser products, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural composition diagram of an existing laser optical axis debugging device; Figure 2 It is the overall layout diagram of the laser optical axis debugging device of the present invention; Figure 3 is a cross-sectional view of the laser generating mechanism of the present invention; Figure 4 is a cross-sectional view of the conversion seat of the present invention; Figure 5 It is a schematic diagram of the structure of the conversion seat of the present invention installed in the laser generating mechanism; Figure 6 It is a schematic diagram of the present invention that the laser to be debugged is installed and connected to the laser generating mechanism through the conversion seat; Figure 7 It is a flow chart of the laser optical axis debugging method described in the present invention.

[0017] The following are the descriptions of the reference numerals: 100, fixing seat, 110, V-shaped block, 120, fixing plate, 121, fixing hole; 200, laser generating mechanism, 201, laser emitting 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 cover; 300, target plate, 301, through hole; 400, conversion seat, 410, sleeve, 411, first installation cavity, 412, second installation cavity, 420, connecting plate, 421, connecting hole; 500. Laser to be debugged; 600. Coarse adjustment device, 610. Helium-neon laser, 620. First reflector, 630. Second reflector, 640. Third reflector, 650. Fourth reflector. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution 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.

[0019] The existing coarse adjustment device 600 for an optical resonant cavity is generally composed of a helium-neon laser 610 and a plurality of reflectors, such as Figure 1 As shown, with the first reflector 620 as the reference mirror, the laser beam emitted by the helium-neon laser 610 can finally return to the second reflector 630 along the original path after being reflected by the second reflector 630, the third reflector 640, the fourth reflector 650 and the first reflector 620. The reflected light spot in the second reflector 630 coincides with the incident light spot, that is, a collimated light path is formed, and the laser 500 to be debugged is arranged 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 the site, and the reflectors need to be arranged in a folded manner, which not only requires an increase in the number of reflectors, increases the difficulty of debugging the collimated 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 composed of 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 occupying a large site and low debugging accuracy.

[0020] In view of the above technical problems, the present invention provides a laser optical axis debugging device and debugging method, which can replace the collimated optical path constructed by a helium-neon laser 610 and a plurality of reflectors.

[0021] like Figure 2 As shown, in the first aspect, the present invention provides a laser optical axis debugging device, comprising a fixing seat 100, a laser generating mechanism 200, a target plate 300 and a conversion seat 400, wherein the laser generating mechanism 200 is arranged on the fixing seat 100, and a laser emitting 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, a through hole 301 is formed in the middle of the target plate 300, and the center of the through hole 301 is coaxially arranged with the center of the laser emitting port 201; the conversion seat 400 is sleeved on one side of the laser generating mechanism 200 close to the laser emitting port 201, and the laser 500 to be debugged is sleeved on the outside of the conversion seat 400.

[0022] The present invention can form a collimated optical path through the laser generating mechanism 200 and the target plate 300. Compared with the existing coarse adjustment scheme, the present invention has lower site requirements, and general sites can meet the requirements, so there is no need for folding, which greatly improves the debugging accuracy; in addition, after completing the adjustment of the collimated optical path, the present invention can install the laser 500 to be debugged on the laser generating mechanism 200 through the conversion seat 400 to complete the debugging of the two reflectors of the optical resonant cavity. When the model of the laser 500 to be debugged changes, the laser 500 of different models can be installed on the laser generating mechanism 200 by replacing the matching conversion seat 400, which has the advantage of strong universality.

[0023] In one embodiment, if Figure 3 As shown, the laser generating mechanism 200 includes a cylinder 210, a laser module 220, a battery pack 230 and a switch 240. The cylinder 210 is a hollow structure with openings at both ends, wherein the opening at one end forms the laser emission port 201. The laser module 220, the battery pack 230 and the switch 240 are sequentially arranged in the hollow structure from a position close to the laser emission port 201 to a position away 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.

[0024] In the above technical solution, after the switch 240 is turned on, the laser module 220 emits laser light under the premise of power provided by the battery pack 230 , and the laser light is emitted from the laser emission port 201 toward the target plate 300 .

[0025] In one embodiment, the cylinder 210 is composed of a first cylinder 211, a second cylinder 212 and a third cylinder 213 which are coaxially connected in sequence, the diameters of the first cylinder 211, the second cylinder 212 and the third cylinder 213 decrease in sequence, and the laser emission port 201 is arranged on the third cylinder 213.

[0026] In the above technical solution, the first cylinder 211, the second cylinder 212 and the third cylinder 213 are an integrally formed structure, which is processed by a high-precision machine tool and has a high coaxiality, which is conducive to improving the debugging accuracy.

[0027] In one embodiment, a plurality of threaded holes 2121 are formed on the second cylinder 212 . The threaded holes 2121 are arranged along the radial direction of the second cylinder 212 . Adjustment screws 2122 are connected to the threaded holes 2121 for adjusting the position of the laser module 220 .

[0028] In the above technical solution, the laser generating mechanism 200 is installed on the fixing seat 100, and the cylinder 210 is rotated. At this time, it can be seen that the light spot emitted by the laser module 220 moves in a circular motion on the target plate 300, and then the size of the trajectory of the light spot movement can be adjusted by screwing the adjusting screw 2122. When the movement trajectory of the light spot is adjusted to be equal to the size of the light spot itself, the debugging of the collimated light path is completed. Theoretically, the farther the distance between the target plate 300 and the laser generating mechanism 200 is, the smaller the divergence angle of the obtained collimated light path is, and the better the collimation is; in fact, this distance can be adjusted according to actual needs to meet the debugging accuracy. For example, when the distance between the laser generating mechanism 200 and the target plate 300 is 10m, the trajectory radius of the light spot moving on the target plate 300 is 2mm, and the axis deviation angle of the collimated light path at this time is 0.2mrad.

[0029] In one embodiment, the laser generating mechanism 200 further includes an end cover 250 , which is disposed on a side of the third cylinder 213 away from the second cylinder 212 , and a touch end of the switch 240 is exposed from the end cover 250 .

[0030] In one embodiment, if Figure 4-6 As shown, the conversion seat 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 on the outside of the second cylinder 212 and the third cylinder 213. The laser 500 to be debugged is sleeved on the outside of the sleeve 410 and fixedly connected to the connecting plate 420.

[0031] In one embodiment, a first mounting cavity 411 and a second mounting cavity 412 are coaxially formed inside the sleeve 410, and the first mounting cavity 411 and the second mounting cavity 412 respectively match the outer circles of the second cylinder 212 and the third cylinder 213, and the connecting plate 420 is installed at one end of the first mounting cavity 411 away from the second mounting cavity 412, and a connecting hole 421 for connecting the laser 500 to be debugged is formed on the connecting plate 420.

[0032] In one embodiment, the fixing seat 100 includes a V-shaped block 110 and a fixing plate 120, a V-shaped groove for placing the laser generating mechanism 200 is formed in the middle of the V-shaped block 110, two fixing plates 120 are respectively arranged on both sides of the V-shaped block 110, and a fixing hole 121 is formed on each of the fixing plates 120.

[0033] In one embodiment, a spherical mirror (not shown) is further included. The spherical mirror is disposed between the laser generating mechanism 200 and the target plate 300. The focus of the spherical mirror and the center of the through hole 301 are located on the same straight line.

[0034] Second, as Figure 7 As shown, the present invention provides a laser optical axis debugging method, which is implemented based on the laser optical axis debugging device provided by the first aspect of the present invention, and specifically includes the following steps: S1, installing the laser generating mechanism 200 on the fixing base 100; S2, placing the target plate 300 at a certain distance in front of the laser generating mechanism 200 on the side where the laser emitting port 201 is formed; S3, adjusting the position of the laser emission port 201 so that it is in the same straight line as the center of the through hole 301 of the target plate 300; Specifically, the laser generating mechanism 200 is mounted on the fixing seat 100, and the cylinder 210 is rotated. At this time, it can be seen that the light spot emitted by the laser module 220 makes a circular motion on the target plate 300, and then the size of the light spot motion trajectory can be adjusted by screwing the adjusting screw 2122. When the motion trajectory of the light spot is adjusted to be equal to the size of the light spot itself, the debugging of the collimated optical path is completed; S4, sleeve the conversion seat 400 on the side of the laser generating mechanism 200 close to the laser emitting port 201, and then sleeve the laser 500 to be debugged on the conversion seat 400; S5, adjusting the position of the optical resonant cavity in the laser 500 so that the laser light emitted by the laser 500 coincides with the laser light emitted by the laser generating mechanism 200, thus completing the optical axis adjustment of the laser 500.

[0035] In summary, the laser optical axis debugging device and debugging method provided by the present invention replace the helium-neon laser and multiple reflectors in the existing optical resonant cavity coarse adjustment scheme. The debugging device composed of a laser generating mechanism and a target plate with a through hole can form a collimated optical path for debugging, and has low requirements on the site. Generally, the site can meet the requirements, so there is no need for folding, which greatly improves the debugging accuracy. At the same time, the debugging device provided by the present invention has few components, simple structure, easy operation and carrying, and can be operated by replacing the conversion seat for different laser products, and has a wider range of applications.

[0036] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A laser optical axis debugging device, characterized in that: include: Fixed seat: A laser generating mechanism, wherein the laser generating mechanism is disposed on the fixing seat and a laser emitting port is formed at one end of the laser generating mechanism; A target plate, wherein the target plate is spaced apart 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 coaxially arranged with the center of the laser emitting port; A conversion seat is sleeved on a side of the laser generating mechanism close to the laser emitting port, and the laser to be debugged is sleeved on the outside of the conversion seat.

2. The laser optical axis debugging device according to claim 1, characterized in that: The laser generating mechanism comprises a cylinder, a laser module, a battery pack and a switch. The cylinder is a hollow structure with openings at both ends, wherein the opening at one end forms the laser emission port. The laser module, the battery pack and the switch are sequentially arranged in the hollow structure from a position close to the laser emission port to a position far from the laser emission port. The laser outlet of the laser module is close to the laser emission port and the two are coaxial. Wherein, the laser module, the battery pack and the switch are electrically connected.

3. The laser optical axis debugging device according to claim 2, characterized in that: The cylinder is composed of a first cylinder, a second cylinder and a third cylinder which are coaxially connected in sequence, the diameters of the first cylinder, the second cylinder and the third cylinder decrease in sequence, and the laser emission port is arranged on the third cylinder.

4. The laser optical axis debugging device according to claim 3, characterized in that: A plurality of threaded holes are formed on the second cylinder, and the threaded holes are arranged along the radial direction of the second cylinder. Adjustment screws are connected in cooperation with the threaded holes to adjust the position of the laser module.

5. The laser optical axis debugging device according to claim 4, characterized in that: The laser generating mechanism further comprises an end cover, which is arranged on a side of the third cylinder away from the second cylinder, and the contact end of the switch is exposed from the end cover.

6. The laser optical axis debugging device according to claim 3, characterized in that: The conversion seat 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, and the laser to be debugged is sleeved outside the sleeve and fixedly connected to the connecting plate.

7. The laser optical axis debugging device according to claim 6, characterized in that: A first mounting cavity and a second mounting cavity are coaxially formed inside the sleeve, and the first mounting cavity and the second mounting cavity match the outer circles of the second cylinder and the third cylinder respectively. The connecting plate is installed at one end of the first mounting cavity away from the second mounting cavity, and a connecting hole for connecting the laser to be debugged is formed on the connecting plate.

8. The laser optical axis debugging device according to claim 1, characterized in that: The fixing seat includes a V-shaped block and a fixing plate. A V-shaped groove for placing the laser generating mechanism is formed in the middle of the V-shaped block. The two fixing plates are respectively arranged on both sides of the V-shaped block, and a fixing hole is formed on each fixing plate.

9. The laser optical axis debugging device according to claim 1, characterized in that: It also includes a spherical mirror, which is arranged between the laser generating mechanism and the target plate, and the focus of the spherical mirror and the center of the through hole are located on the same straight line.

10. A laser optical axis debugging method, implemented based on the laser optical axis debugging device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, install the laser generating mechanism on the fixed seat; S2, placing the target plate at a certain distance in front of the laser generating mechanism on the side where the laser emission port is formed; S3, adjusting the position of the laser emission port so that it is in the same straight line as the center of the through hole of the target plate; S4, sleeve the conversion seat on the side of the laser generating mechanism close to the laser emission port, and then sleeve the laser to be debugged on the conversion seat; S5, adjusting the position of the optical resonant cavity in the laser so that the laser light emitted by the laser coincides with the laser light emitted by the laser generating mechanism, thus completing the optical axis adjustment of the laser.

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