A miniature multi-axis adjustable collimated dual-wavelength laser module

Abstract

The application provides a miniature multi-axis adjusting parallel light dual-wavelength laser module, which comprises a heat dissipation shell, two light folding components arranged longitudinally and oppositely in the direction of light folding-in end, laser components respectively located outside the light folding-in end of the two light folding components, and compound lenses respectively located outside the light folding-out end of the two light folding components; the laser component comprises a laser head mounting block with adjustable inclination angle and a laser head arranged on the laser head mounting block; the outer end of the two laser head mounting blocks is abutted by a jacking screw on both sides, and the inner end is provided with a spring; the jacking screw is threadedly connected to the heat dissipation shell and is used for adjusting the angle of the laser head mounting block in cooperation with the spring; the light folding component comprises a refraction adjusting part provided with an adjusting interface. The application relates to the technical field of laser modules.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser modules, in particular to a dual-wavelength laser module with micro multi-axis adjustment of parallel light. BACKGROUND

[0002] Laser modules are widely used in the fields of precision machining, medical equipment and detection instruments, and their miniaturization and multi-wavelength integration have become a trend of technological development. Existing dual-wavelength laser modules usually use independent laser sources arranged side by side, and achieve dual-light-path output through a beam splitter or a beam combiner to meet the application requirements of different wavelengths. Such a structure requires a large horizontal space, and the adjustment of the optical path relies on multiple independent lenses, making it difficult to compress the overall volume. In addition, the angle adjustment of the laser head usually uses rigid screws for direct pressure, which lacks a buffer mechanism and is prone to affect the stability of the optical path due to stress concentration.

[0003] In the prior art, the layout of the dual-wavelength module results in a too large horizontal size of the heat dissipation shell, making it difficult to meet the integration requirements of micro devices. The pitch adjustment of the laser head is only achieved by a single-sided jackscrew, lacking a resilient reset structure, which limits the adjustment accuracy and is prone to vibration offset. The light folding assembly is usually a fixed prism or mirror, which cannot be adjusted in a small angle, and the parallelism and coincidence of the output optical path are difficult to control accurately, affecting the correction effect of the compound lens. In addition, the traditional compound lens needs to stack multiple lens groups to adapt to the dual-wavelength characteristics, further increasing the axial size. The heat dissipation shell lacks a laser head mounting slot and lens limiting structure for compact layout, resulting in low optical path calibration efficiency.

[0004] Therefore, the present application provides a dual-wavelength laser module with micro multi-axis adjustment of parallel light to solve the problems of low space utilization, insufficient angle adjustment accuracy and poor optical path stability. SUMMARY

[0005] To overcome the defects of the prior art, the present application provides a dual-wavelength laser module with micro multi-axis adjustment of parallel light to solve the problems of large volume, low angle adjustment accuracy and poor optical path stability of the existing dual-wavelength laser module.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is: a double-wavelength laser module for micro multi-axis adjustment of parallel light, comprising a heat dissipation shell, two light folding assemblies arranged longitudinally and oppositely in the direction of light folding-in end are arranged on the heat dissipation shell, a laser assembly is respectively arranged outside the light folding-in end of the two light folding assemblies, and a compound lens is respectively arranged outside the light folding-out end of the two light folding assemblies, the laser assembly comprises a laser head mounting block with adjustable inclination angle and a laser head arranged on the laser head mounting block, a top screw is abutted on both sides of the outer end of the two laser head mounting blocks, springs are arranged on both sides of the inner end of the two laser head mounting blocks, the top screw is threadedly connected to the heat dissipation shell and is used for adjusting the inclination angle of the laser head mounting block in cooperation with the springs, and the light folding assembly comprises a refraction adjusting piece provided with an adjusting interface.

[0007] Based on the above, the double-wavelength laser module for micro multi-axis adjustment of parallel light has the beneficial effects of solving the problems of large size, low angle adjustment precision and poor light path stability of the double-wavelength laser module in the prior art, mainly embodied in:

[0008] 1. The two light folding assemblies arranged longitudinally and oppositely in the direction of light folding-in end are arranged on the heat dissipation shell, the laser assembly and the compound lens are arranged outside the light folding-in end and the light folding-out end respectively, the longitudinal compact layout of the laser source and the light path is realized, the horizontal space occupation is reduced, and thus the problem of large size of the double-wavelength laser module is solved.

[0009] 2. The outer end of the laser head mounting block is abutted on both sides of the top screw, the inner end of the laser head mounting block is provided with the springs, the top screw is threadedly connected to the heat dissipation shell and adjusts the angle of the laser head mounting block in cooperation with the springs, the spring provides elastic restoring force and the top screw applies accurate pressure, the fine adjustment and stable maintenance of the inclination angle of the laser head are realized, and thus the problem of low angle adjustment precision is solved.

[0010] 3. The refraction adjusting piece provided with the adjusting interface is included in the light folding assembly, the refraction adjusting piece can be operated to fine adjust the light refraction angle, the parallel output and coincidence control of the light path are ensured, the accuracy and long-term stability of the light path correction are realized, and thus the problem of poor light path stability is solved.

[0011] Further, the outer end of the laser head mounting block is provided with a top screw groove, the end of the top screw is abutted on the top screw groove, the inner end of the laser head mounting block is provided with a spring mounting port, one end of the spring is mounted in the spring mounting port, and the other end is abutted on the inner wall of the heat dissipation shell close to the inner end of the laser head mounting block.

[0012] Based on the above, the beneficial effects of the top screw groove are to accurately receive the pressing force of the end of the clamping screw, to realize the concentrated transmission of the angle adjustment force and the micron-level displacement control; the beneficial effects of the spring are to continuously apply a reverse thrust to the inner end of the laser head mounting block, to form a dynamic couple with the outer end pressing force of the clamping screw, to eliminate the adjustment gap and absorb the vibration impact, and to realize the self-locking and anti-interference stability after the inclination angle adjustment of the laser head.

[0013] Further, the light ray folding assembly further comprises a refraction guide block, the refraction guide block is provided with a laser input channel parallel to the laser emission direction and a laser emission opening perpendicular to the laser emission direction, the refraction adjusting piece is rotationally arranged at the intersection of the extension line of the laser input channel and the laser emission opening, and the refraction adjusting piece is provided with a refraction mirror corresponding to the intersection of the extension line, and the adjusting interface is a polygonal groove, and the deflection angle adjustment range of the refraction mirror is ±5°.

[0014] Based on the above, the beneficial effects of the refraction guide block are to construct a 90° turning closed light path guiding structure through the integrally arranged laser input channel and laser emission opening, to accurately guide the incident laser to the refraction mirror area under mechanical limiting, and to realize the zero displacement stability and environmental interference resistance of the light path turning; the beneficial effects of the laser input channel are to physically constrain the original light beam output by the laser head; the beneficial effects of the laser emission opening are to provide an unobstructed emission path for the refraction laser; the beneficial effects of the refraction mirror are to accurately turn the parallel incident light beam to the vertical emission direction through mirror reflection, and to realize the efficient folding of the double-band laser; the beneficial effects of the polygonal groove are to match a special wrench tool, to accurately control the rotation angle of the refraction adjusting piece through the torque applied by the tool, to avoid the risk of slipping caused by the operation of the screwdriver, and to realize the repeatability and operation safety of the micron-level angle adjustment of the refraction mirror.

[0015] Further, the composite lens comprises a first lens and a second lens, the first lens is provided with a first middle lens inside, the input part of the first middle lens is a plane, and the output part is a convex surface, the second lens is sequentially provided with an inner lens, a second middle lens and an outer lens from the laser input side to the laser output side, the input part of the inner lens and the outer lens is a plane, and the output part is a convex surface, the input part of the second middle lens is a concave surface, and the output part is a plane, and the first lens is further provided with an additional lens corresponding to the input end of the laser input channel of the refraction guide block, the input part of the additional lens is a plane, and the output part is a convex surface.

[0016] Based on the above, the beneficial effects of the first middle lens are that the input part plane receives the laser beam to eliminate the incident distortion, the output part convex surface performs one-sided convergence compression on the light beam to form a transition light beam with a preset divergence angle, and the primary collimation and energy density improvement of the upper wavelength laser are realized; the beneficial effects of the second lens are that the three-layer structure of the inner lens, the second middle lens and the outer lens is integrated, the step-by-step limiting grooves inside the cavity fix the spacing between the lenses, the cascading correction light path for the lower wavelength laser is formed, and the compact assembly and axial size compression of the multi-lens group are realized; the beneficial effects of the inner lens are that the input part plane receives the refracted laser to maintain the wavefront integrity, and the output part convex surface performs primary convergence to compress the beam cross-sectional area and correct the astigmatism caused by the refractive adjustment member, and the primary beam shaping of the lower wavelength laser is realized; the beneficial effects of the second middle lens are that the input part concave surface diverges the convergent light beam output by the inner lens to offset the spherical aberration, the output part plane reconstructs the wavefront parallelism, eliminates the focus shift caused by the previous convergence, and realizes the accurate recovery of the beam parallelism; the beneficial effects of the outer lens are that the input part plane receives the corrected parallel light to maintain the optical properties, and the output part convex surface performs final micro-convergence to match the external interface standard of the composite lens, and the standardization control of the output spot size and working distance is realized; the beneficial effects of the additional lens are that the input part plane directly receives the original light beam of the laser head to suppress scattering, and the output part convex surface performs pre-focusing to reduce the diameter of the light beam before entering the folding assembly, and the transmission loss minimization of the high-energy laser before folding is realized.

[0017] Further, the end face of the heat dissipation shell is provided with a first laser piece mounting groove and a second laser piece mounting groove arranged longitudinally staggered, and the two laser head mounting blocks are respectively mounted in the first laser piece mounting groove and the second laser piece mounting groove.

[0018] Based on the above, the beneficial effects of the first laser piece mounting groove and the second laser piece mounting groove are that the two laser head mounting blocks are installed in a longitudinal staggered manner, avoiding the spatial interference of the double light paths before folding, and realizing the stereoscopic compact arrangement of the dual-wavelength laser source; the beneficial effects of the laser head mounting block are that the heat generated by the laser head is uniformly conducted to the heat dissipation shell, and the two side top screw holes and spring mounting openings form a micro-gap fit with the side wall of the mounting groove, reserving deformation space for inclination adjustment, and realizing the compatibility of the laser source heat management precision and mechanical adjustment function.

[0019] Further, the heat dissipation shell is also provided with a laser head lens limiting plate mounting groove, which is located between the first laser piece mounting groove and the second laser piece mounting groove, the upper end of the laser head lens limiting plate mounting groove is provided with a first lens mounting groove and opens to the second laser piece mounting groove, and the lower end is provided with a second lens mounting groove and opens to the first laser piece mounting groove, the depth of the first lens mounting groove and the second lens mounting groove is greater than the depth of the first laser piece mounting groove and the second laser piece mounting groove, and the depth of the laser head lens limiting plate mounting groove is less than the depth of the first laser piece mounting groove and the second laser piece mounting groove.

[0020] Further, the laser head lens limiting plate mounting groove is provided with a refractive mirror groove corresponding to the position of each laser head mounting block, and the refractive guide block is mounted in the refractive mirror groove, the laser shooting channel openings of the two refractive guide blocks are both directed to the output end of the laser head, and the laser head lens limiting plate is provided with an adjusting piece limiting hole corresponding to each refractive adjusting piece, and the adjusting piece limiting hole limits the refractive adjusting piece.

[0021] Based on the above, the laser head lens limiting plate mounting groove has the beneficial effects of installing the laser head lens limiting plate, realizing the spatial isolation of the folding assembly and the laser source, the accurate positioning of the assembly plane, and the constraint of the refractive guide block through the refractive mirror groove, and forcibly aligning the laser shooting channel axis of the refractive guide block with the output end of the laser head, realizing the zero-calibration assembly of the folding assembly and the laser source; the refractive guide block has the beneficial effects of directing the layout of the laser shooting channel opening opposite to the output end of the laser head, making the original laser beam enter the closed light guide channel without deviation, avoiding the path deviation caused by air interface refraction, and realizing the lossless transmission of laser from emission to folding.

[0022] Further, the heat dissipation shell is also provided with a whole line groove, which extends from the outside of the first laser piece mounting groove to the outside of the second laser piece mounting groove through the lower edge of the heat dissipation shell, and is provided with an external connector mounting area below the second laser piece mounting groove, two opposite corners of the external connector mounting area are respectively provided with mounting steps, and the surfaces of the two mounting steps are provided with internal thread holes for mounting the external connector.

[0023] Based on the above, the beneficial effects of the whole wire slot are that the power supply lines of the two laser assemblies are uniformly bundled through the slot depth, the cable is prevented from hanging or crossing outside the shell, and the circuit wiring is integrated and protected against pulling; the beneficial effects of the external connector installation area are that a rectangular installation platform is formed by expanding the slot width to provide a flush assembly surface for the external connector with the lower edge of the heat dissipation shell, and the standardized embedded installation of the external interface is achieved; the beneficial effects of the installation step are that the installation height of the external connector is raised through the step plane, the wiring end is accurately aligned with the lower edge side opening of the heat dissipation shell, and the step side avoids the cable path in the whole wire slot, achieving the staggered spatial isolation of the external connector and the internal circuit.

[0024] Further, the whole wire slot is provided with a circuit board, the circuit board is fixedly installed on the external connector, and the wiring end of the external connector is exposed to the lower edge side of the heat dissipation shell.

[0025] Further, the heat dissipation shell is provided with positioning installation ports on both sides of the laser emission surface, the end of the composite lens is provided with four threaded holes, the heat dissipation shell is provided with an arc-shaped adjustment port corresponding to the position of each threaded hole, two diagonally arranged threaded holes are fixedly connected to the heat dissipation shell by screws penetrating through the corresponding arc-shaped adjustment ports, and the other two diagonally arranged threaded holes are above the corresponding arc-shaped adjustment ports and are not connected by screws, so that when the fixedly connected screw is loosened, the composite lens can be rotated along the arc-shaped adjustment port to adjust the laser output angle.

[0026] Based on the above, the beneficial effects of the two positioning installation ports are that the inner wall vertical reference surface is tightly matched with the positioning pin of the external equipment to forcibly limit the initial installation direction of the composite lens, and the zero-deviation mechanical connection of the laser module and the external optical system is achieved; the beneficial effects of the arc-shaped adjustment port are that the screw movement track is limited by the arc length range, so that the composite lens can be rotated ±3° around the arc-shaped adjustment port when the screw is loosened, and the stepless fine adjustment of the output laser angle and the consistency of the optical axis are achieved; the beneficial effects of the four threaded holes are that diagonal grouping layout is adopted, one pair of threaded holes is fixed by penetrating the arc-shaped adjustment port, and the other pair of threaded holes is not locked by screws, forming a constraint system of "two-point fixing + two-point floating", which releases the rotation freedom degree while maintaining the lens plane constraint during adjustment, and the anti-displacement safety control of the composite lens during angle adjustment is achieved.

[0027] In order to make the above-mentioned features of the present application and the purposes to be achieved more clearly, the present application will be further described below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a perspective view of the present application;

[0029] Figure 2: the schematic diagram of the heat dissipation shell of the present application;

[0030] Figure 3 : the three-dimensional schematic diagram of the laser assembly of the present application;

[0031] Figure 4 : the three-dimensional schematic diagram of the laser assembly of the present application from another perspective;

[0032] Figure 5 : the schematic diagram of the composite lens of the present application;

[0033] Figure 6 : the schematic diagram of the first lens of the present application;

[0034] Figure 7 : the schematic diagram of the second lens of the present application;

[0035] Figure 8 : the schematic diagram of the distribution position of the internal lenses of the first lens and the second lens of the present application.

[0036] BRIEF DESCRIPTION OF DRAWINGS 1-heat dissipation shell, 11-first laser piece mounting slot, 12-second laser piece mounting slot, 13-laser head lens limiting plate mounting slot, 131-first lens mounting slot, 132-second lens mounting slot, 133-refraction mirror slot, 14-whole line slot, 141-external connector mounting area, 142-mounting ladder, 143-internal screw hole, 15-arc-shaped adjusting opening, 16-positioning mounting opening, 2-laser assembly, 21-laser head mounting block, 211-top screw slot, 212-spring mounting opening, 22-laser head, 3-laser head lens limiting plate, 31-adjusting piece limiting hole, 4-light ray refraction assembly, 41-refraction adjusting piece, 411-adjusting interface, 412-refraction mirror, 42-refraction guide block, 421-laser shooting channel, 422-laser shooting opening, 5-composite lens, 51-first lens, 511-first middle lens, 512-attached lens, 52-second lens, 521-internal lens, 522-second middle lens, 523-external lens, 6-tightening screw, 7-spring, 8-circuit board, 9-external connector. DETAILED DESCRIPTION

[0037] Referring to Figures 1-8 the drawings,

[0038] The application provides a miniature multi-axis adjustable parallel light dual-wavelength laser module, which comprises a heat dissipation shell 1, two light folding assemblies 4 arranged longitudinally and oppositely in the light folding-in direction are arranged on the heat dissipation shell 1, a laser assembly 2 is arranged outside the light folding-in end of each light folding assembly 4, and a compound lens 5 is arranged outside the light folding-out end of each light folding assembly 4, the laser assembly 2 comprises a laser head mounting block 21 with adjustable inclination angle and a laser head 22 arranged on the laser head mounting block 21, the outer ends of the two laser head mounting blocks 21 are abutted by top screws 6 on both sides, the inner ends of the two laser head mounting blocks 21 are provided with springs 7, the top screws 6 are threadedly connected to the heat dissipation shell 1 and used for adjusting the angle of the laser head mounting block 21 in cooperation with the springs 7, and the light folding assembly 4 comprises a refraction adjusting piece 41 provided with an adjusting interface 411.

[0039] The heat dissipation shell 1 is preferably made of copper material with high thermal conductivity, and the shell wall thickness is controlled within 15 mm, so that when the dual-wavelength laser head is continuously operated at full power, the heat generated by the laser head 22 can be quickly transmitted to the heat dissipation shell 1 through the laser head mounting block 21 and efficiently diffused in the shell, when the mounting contact surface of the heat dissipation shell 1 and the external equipment is fixed to the external equipment, the heat is not only naturally convected to the air through the exposed surface of the heat dissipation shell 1, but also efficiently transmitted to the heat dissipation structure of the external equipment in the form of heat conduction, forming a double heat dissipation path, so that the performance or service life of the laser head 22 is effectively avoided due to the excessively high temperature.

[0040] In the embodiment, the outer ends of the laser head mounting block 21 are provided with top screw grooves 211, the ends of the top screws 6 are abutted on the top screw grooves 211, the inner ends of the laser head mounting block 21 are provided with spring mounting openings 212, one end of the spring 7 is mounted in the spring mounting opening 212, and the other end is abutted on the inner wall of the heat dissipation shell 1 close to the inner end of the laser head mounting block 21.

[0041] In the embodiment, the light turning assembly 4 further comprises a refractive guide block 42, which is provided with a laser input channel 421 parallel to the laser emission direction and a laser emission opening 422 perpendicular to the laser emission direction, the refractive adjusting member 41 is rotationally arranged at the intersection of the extension line of the laser input channel 421 and the laser emission opening 422, and the refractive adjusting member 41 is provided with a refractive mirror 412 corresponding to the intersection of the extension line, the adjusting interface 411 is a polygonal groove, the deflection angle adjustment range of the refractive mirror 412 can reach ≥±5°, and in the calibration process, the external adjusting rod is inserted into the polygonal groove 411 to accurately rotate and adjust the refractive adjusting member 41, so that the original light beam emitted from the laser head 22 is strictly perpendicular to the mounting surface of the heat dissipation shell 1 and the external equipment after being turned by the refractive mirror 412, and the angle resolution of the adjustment depends on the effective operation length of the external adjusting rod, and the longer the length of the adjusting rod, the higher the control accuracy of the refractive mirror 412 to the small angle change.

[0042] In the embodiment, the composite lens 5 comprises a first lens 51 and a second lens 52, the first lens 51 is provided with a first middle lens 511, the input part of the first middle lens 511 is a plane, and the output part is a convex surface, the second lens 52 is sequentially provided with an inner lens 521, a second middle lens 522 and an outer lens 523 from the laser input side to the laser output side, the input part of the inner lens 521 and the outer lens 523 is a plane, and the output part is a convex surface, the input part of the second middle lens 522 is a concave surface, and the output part is a plane; the first lens 51 is further provided with an additional lens 512 corresponding to the input end of the laser input channel 421 of the refractive guide block 42, the input part of the additional lens 512 is a plane, and the output part is a convex surface.

[0043] In the embodiment, the heat dissipation shell 1 is provided with a first laser component mounting groove 11 and a second laser component mounting groove 12 arranged longitudinally and staggered, and the two laser head mounting blocks 21 are respectively mounted in the first laser component mounting groove 11 and the second laser component mounting groove 12.

[0044] In the embodiment, the heat dissipation shell 1 is further provided with a laser head lens limiting plate mounting groove 13 located between the first laser piece mounting groove 11 and the second laser piece mounting groove 12. The upper end of the laser head lens limiting plate mounting groove 13 is provided with a first lens mounting groove 131 opening towards the second laser piece mounting groove 12, and the lower end is provided with a second lens mounting groove 132 opening towards the first laser piece mounting groove 11. The depths of the first lens mounting groove 131 and the second lens mounting groove 132 are greater than the depths of the first laser piece mounting groove 11 and the second laser piece mounting groove 12. The depth of the laser head lens limiting plate mounting groove 13 is less than the depths of the first laser piece mounting groove 11 and the second laser piece mounting groove 12.

[0045] In the embodiment, the laser head lens limiting plate mounting groove 13 is mounted with a laser head lens limiting plate 3. The laser head lens limiting plate mounting groove 13 is provided with a refractive mirror groove 133 corresponding to the position of each laser head mounting block 21. The refractive guide block 42 is mounted in the refractive mirror groove 133. The laser entry channels 421 of the two refractive guide blocks 42 open towards the output end of the respective laser head 22. The laser head lens limiting plate 3 is provided with an adjusting piece limiting hole 31 corresponding to each refractive adjusting piece 41. The adjusting piece limiting hole 31 limits the refractive adjusting piece 41.

[0046] In the embodiment, the heat dissipation shell 1 is further provided with a whole line groove 14 extending from the outside of the first laser piece mounting groove 11 to the outside of the second laser piece mounting groove 12 through the lower edge of the heat dissipation shell 1. The whole line groove 14 is provided with an external connector mounting area 141 below the second laser piece mounting groove 12. Two opposite corners of the external connector mounting area 141 are respectively provided with a mounting step 142. The surfaces of the two mounting steps 142 are respectively provided with an internal threaded hole 143 for mounting the external connector 9.

[0047] In the embodiment, the whole line groove 14 is provided with a circuit board 8 fixedly mounted on the external connector 9. The wiring end of the external connector 9 is exposed on the lower edge side of the heat dissipation shell 1.

[0048] In the embodiment, the heat dissipation shell 1 is provided with a positioning mounting port 16 on both sides of the laser emission surface. The end of the composite lens 5 is provided with four threaded holes. The heat dissipation shell 1 is provided with an arc-shaped adjusting port 15 corresponding to the position of each threaded hole. Two opposite threaded holes are fixedly connected to the heat dissipation shell 1 by screws penetrating through the corresponding arc-shaped adjusting port 15. The other two opposite threaded holes correspond to the arc-shaped adjusting port 15 above and are not connected by screws. When the fixedly connected screw is loosened, the composite lens 5 can be rotated along the arc-shaped adjusting port 15 to adjust the laser output angle.

[0049] In summary, the specific embodiments of the present application are:

[0050] When the micro multi-axis adjustment parallel light dual-wavelength laser module is in operation, the two laser heads 22 respectively emit laser beams of different wavelengths, the light beam output by the upper laser head 22 directly enters the additional lens for pre-focusing and is guided to the refractive mirror 412 through the laser entry channel 421 of the corresponding refractive guide block 42, and the light beam output by the lower laser head 22 is guided to the refractive mirror 412 through the laser entry channel 421 of the corresponding refractive guide block 42, the refractive adjustment piece 41 is operated by the tool through the polygonal groove 411 to drive the refractive mirror 412 to finely adjust the deflection angle, so that the two light beams are respectively injected into the first lens 51 and the second lens 52 of the composite lens 5 after being deflected by 90°;

[0051] The first middle lens in the first lens 51 receives the light beam through the input part plane and eliminates the distortion, and the output part convex surface performs primary collimation; the second lens 52 successively compresses the light beam through the inner lens, restores the parallelism through the second middle lens concave surface to offset the spherical aberration, and outputs the light spot through the outer lens micro-converging, among the four threaded holes at the end of the composite lens 5, the screws at opposite angles are respectively locked in the arc-shaped adjustment port 15 of the heat dissipation shell 1, forming two-point fixed two-point floating constraints, when the fixed screws are loosened, the composite lens 5 can be rotated by ±3° along the arc-shaped adjustment port 15, realizing stepless calibration of the output angle;

[0052] The angle adjustment of the laser head mounting block 21 is realized by operating the jacking screw 6: when the jacking screw 6 is tightened, the outer end of the laser head mounting block 21 is pushed, the spring 7 generates a reverse thrust, a force couple is formed to make the mounting block tilt around the fulcrum; the elastic restoring force of the spring 7 eliminates the adjustment gap, the heat dissipation shell 1 avoids the interference of the double light paths through the longitudinal staggered layout of the first laser piece mounting groove 11 and the second laser piece mounting groove 12, and at the same time, the heat of the laser head 22 is conducted to the heat dissipation shell 1 for dissipation, the power supply circuit of the circuit board 8 in the whole slot 14 is led out through the external connector 9, the external connector 9 is fixed to the lower edge of the shell through the internal threaded hole 143 of the mounting step 142, and the wiring end is exposed to realize external electrical connection;

[0053] The positioning mounting port 16 cooperates with the positioning pin of the external equipment to ensure zero deviation of the module installation, the light path is controlled under the closed channel of the refractive guide block 42 and the multi-layer lens group of the composite lens 5, and finally high parallelism dual-wavelength laser is output.

[0054] The above description is only the most optimal solution embodiment of the present application and is not used to limit the present application, and various modifications or replacements of the present application made by those skilled in the art without departing from the essence and protection scope of the present application should be within the protection scope of the present application.

Claims

1. A miniature multi-axial adjustment parallel light dual-wavelength laser module comprising a heat dissipation shell (1), characterized in that: The heat dissipation shell (1) is provided with two light ray folding assemblies (4) arranged longitudinally and opposite in light ray folding direction, a laser assembly (2) located outside the light ray folding end of each light ray folding assembly (4), and a compound lens (5) located outside the light ray folding end of each light ray folding assembly (4), the laser assembly (2) comprises a laser head mounting block (21) with adjustable inclination and a laser head (22) arranged on the laser head mounting block (21), the outer ends of the two laser head mounting blocks (21) are abutted by top screws (6), and the inner ends are provided with springs (7), the top screws (6) are threadedly connected to the heat dissipation shell (1) and used for adjusting the inclination of the laser head mounting block (21) in cooperation with the springs (7), and the light ray folding assembly (4) comprises a refraction adjusting piece (41) provided with an adjusting interface (411). The outer ends of the laser head mounting block (21) are provided with top screw grooves (211), the top screws (6) are abutted at the ends of the top screw grooves (211), the inner ends of the laser head mounting block (21) are provided with spring mounting openings (212), one end of the spring (7) is mounted in the spring mounting opening (212), and the other end is abutted against the inner wall of the heat dissipation shell (1) close to the inner end of the laser head mounting block (21). The heat dissipation shell (1) is provided with positioning mounting openings (16) on both sides of the laser emission surface, the end of the compound lens (5) is provided with four threaded holes, the heat dissipation shell (1) is provided with an arc-shaped adjusting opening (15) corresponding to each threaded hole, two diagonally arranged threaded holes are fixedly connected to the heat dissipation shell (1) by penetrating the corresponding arc-shaped adjusting opening (15) through a screw, and the other two diagonally arranged threaded holes are arranged above the corresponding arc-shaped adjusting opening (15) and are not connected by a screw, when the fixedly connected screw is loosened, the compound lens (5) can be rotated along the arc-shaped adjusting opening (15) to adjust the laser output angle.

2. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 1, characterized in that: The light ray folding assembly (4) further comprises a refraction guide block (42), the refraction guide block (42) is provided with a laser entering channel (421) parallel to the laser emission direction and a laser emitting opening (422) perpendicular to the laser emission direction, the refraction adjusting piece (41) is rotationally arranged at the intersection of the extension lines of the laser entering channel (421) and the laser emitting opening (422), the refraction adjusting piece (41) is provided with a refraction mirror (412) corresponding to the intersection of the extension lines, the adjusting interface (411) is a polygonal groove, and the deflection angle adjustment range of the refraction mirror (412) is ±5°.

3. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 2, characterized in that: The composite lens (5) comprises a first lens (51) and a second lens (52), the first lens (51) is internally provided with a first middle lens (511), the input part of the first middle lens (511) is a plane, and the output part is a convex surface, the second lens (52) is internally sequentially provided with an inner lens (521), a second middle lens (522) and an outer lens (523) from the laser input side to the laser output side, the input part of the inner lens (521) and the outer lens (523) is a plane, and the output part is a convex surface, the input part of the second middle lens (522) is a concave surface, and the output part is a plane, and the first lens (51) is externally provided with an additional lens (512) corresponding to the input end of the laser entering channel (421) of the refractive guide block (42), the input part of the additional lens (512) is a plane, and the output part is a convex surface.

4. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 2, characterized in that: The end face of the heat dissipation shell (1) is provided with a first laser piece mounting groove (11) and a second laser piece mounting groove (12) arranged longitudinally and staggered, and the two laser head mounting blocks (21) are respectively mounted in the first laser piece mounting groove (11) and the second laser piece mounting groove (12).

5. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 4, characterized in that: The heat dissipation shell (1) is also provided with a laser head lens limiting plate mounting groove (13), the laser head lens limiting plate mounting groove (13) is located between the first laser piece mounting groove (11) and the second laser piece mounting groove (12), the upper end of the laser head lens limiting plate mounting groove (13) is provided with a first lens mounting groove (131) and opens to the second laser piece mounting groove (12), the lower end is provided with a second lens mounting groove (132) and opens to the first laser piece mounting groove (11), the depth of the first lens mounting groove (131) and the second lens mounting groove (132) is greater than the depth of the first laser piece mounting groove (11) and the second laser piece mounting groove (12), and the depth of the laser head lens limiting plate mounting groove (13) is less than the depth of the first laser piece mounting groove (11) and the second laser piece mounting groove (12).

6. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 5, characterized in that: The laser head lens limiting plate (3) is mounted on the laser head lens limiting plate mounting groove (13), the laser head lens limiting plate mounting groove (13) is provided with a refractive mirror groove (133) corresponding to the position of each laser head mounting block (21), and the refractive guide block (42) is mounted in the refractive mirror groove (133), the laser entering channel (421) openings of the two refractive guide blocks (42) are both directed to the output end of the corresponding laser head (22), and the laser head lens limiting plate (3) is provided with an adjusting piece limiting hole (31) corresponding to each refractive adjusting piece (41), and the adjusting piece limiting hole (31) limits the refractive adjusting piece (41).

7. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 5, characterized in that: The heat dissipation shell (1) is further provided with a whole wire slot (14), which extends from the outside of the first laser component mounting slot (11) to the outside of the second laser component mounting slot (12) through the lower edge of the heat dissipation shell (1), and is provided with an external connector mounting area (141) in the area below the second laser component mounting slot (12), two opposite corners of the external connector mounting area (141) are respectively provided with mounting steps (142), and the surfaces of the two mounting steps (142) are both provided with internal threaded holes (143) for mounting the external connector (9).

8. The dual-wavelength laser module for micro multi-axial adjustment of parallel light according to claim 7, characterized in that: The whole wire slot (14) is provided with a circuit board (8), the circuit board (8) is fixedly installed on the external connector (9), and the wiring end of the external connector (9) is exposed on the lower edge side of the heat dissipation shell (1).

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