Miniature multi-axis parallel light adjusting dual-wavelength laser module

Abstract

The invention provides a miniature multi-axis parallel light adjusting dual-wavelength laser module which comprises a heat dissipation shell. The heat dissipation shell is provided with two longitudinally-arranged light refraction assemblies, laser assemblies and composite lenses, wherein the light refraction ends of the two light refraction assemblies are opposite in direction, the laser assemblies are located outside the light refraction ends of the two light refraction assemblies respectively, and the composite lenses are located outside the light refraction ends of the two light refraction assemblies respectively. The laser assembly comprises a laser head mounting block with an adjustable inclination angle and a laser head arranged on the laser head mounting block; the two sides of the outer ends of the two laser head installation blocks abut against jacking screws, the two sides of the inner ends of the two laser head installation blocks are provided with springs, and the jacking screws are in threaded connection with the heat dissipation shell and used for being matched with the springs to adjust the angles of the laser head installation blocks. The light turning assembly comprises a refraction adjusting piece provided with an adjusting interface. The invention relates to the technical field of laser modules.

Description

Technical Field

[0001] The present invention relates to the technical field of laser modules, and in particular to a miniature multi-axis parallel light regulating dual-wavelength laser module. Background Art

[0002] Laser modules are widely used in precision machining, medical equipment, and testing instruments. Their miniaturization and multi-wavelength integration have become a technological development trend. Existing dual-wavelength laser modules usually use independent laser sources arranged side by side, and realize dual-path output through a beam splitter or a beam combiner to meet the application requirements of different wavelengths. This type of structure requires a large lateral space, and the optical path adjustment relies on multiple sets of independent lenses, which makes the overall volume difficult to compress. At the same time, the angle adjustment of the laser head mostly uses rigid screws to directly press, lacks a buffer mechanism, and is easily affected by stress concentration and affects the stability of the optical path.

[0003] In the existing technology, the layout of the dual-wavelength module causes the lateral size of the heat dissipation housing to be too large, which is difficult to meet the requirements of micro-device integration; the pitch adjustment of the laser head is achieved only by a single-sided top screw, lacks an elastic reset structure, the adjustment accuracy is limited and it is easy to shift due to vibration; the light refraction component is usually a fixed prism or reflector, which cannot fine-tune the refraction angle, and the parallelism and overlap of the output light path are difficult to accurately control, affecting the correction effect of the composite lens. In addition, the traditional composite lens needs to superimpose multiple layers of mirror groups to adapt to the dual-wavelength characteristics, further increasing the axial size, and the heat dissipation housing lacks laser head mounting slots and lens limiting structures for compact layout, resulting in low optical path calibration efficiency.

[0004] Therefore, the inventors urgently need a miniature multi-axis parallel light adjustment dual-wavelength laser module to solve the problems of low space utilization, insufficient angle adjustment accuracy and poor optical path stability. Summary of the Invention

[0005] In response to the above-mentioned defects of the prior art, the present invention provides a miniature multi-axis dual-wavelength laser module for adjusting parallel light, aiming to solve the problems of large size, low angle adjustment accuracy and poor optical path stability of the dual-wavelength laser module in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a miniature multi-axis dual-wavelength laser module for adjusting parallel light, comprising a heat dissipation shell, on which are provided two longitudinally arranged light refracting components with opposite light refracting ends, laser components respectively located outside the light refracting ends of the two light refracting components, and composite lenses respectively located outside the light refracting ends of the two light refracting components, the laser component comprising a laser head mounting block with adjustable tilt angle and a laser head arranged on the laser head mounting block, the outer ends of the two laser head mounting blocks are abutted with tightening screws on both sides, and springs are provided on both sides of the inner ends, the tightening screws are threadedly connected to the heat dissipation shell, and are used to cooperate with the spring to adjust the tilt angle of the laser head mounting block, and the light refracting component comprises a refraction adjustment part provided with an adjustment interface.

[0007] Based on the above, the beneficial effects of a miniature multi-axis parallel light adjustment dual-wavelength laser module are to solve the problems of large size, low angle adjustment accuracy and poor optical path stability of dual-wavelength laser modules in the prior art. The main advantages are: 1. The present invention arranges two longitudinally arranged light deflection components on the heat dissipation housing with light deflection ends in opposite directions, and arranges the laser component and the composite lens at the light deflection end and the light deflection end respectively, thereby achieving a compact longitudinal layout of the laser source and the optical path, reducing the lateral space occupied, and thus solving the problem of the large size of the dual-wavelength laser module.

[0008] 2. The present invention has tightening screws on both sides of the outer end of the laser head mounting block and springs on both sides of the inner end. The tightening screws are threadedly connected to the heat dissipation housing and cooperate with the springs to adjust the angle of the laser head mounting block. The springs provide elastic reset force and the tightening screws apply precise pressure, thereby achieving fine-tuning and stable maintenance of the inclination angle of the laser head, thereby solving the problem of low angle adjustment accuracy.

[0009] 3. The present invention includes a refraction adjustment member with an adjustment interface included in the light refracting assembly. The refraction adjustment member can be operated to fine-tune the refraction angle of the light, ensuring the parallel output and coincidence control of the light path, achieving the accuracy and long-term stability of the light path correction, and thus solving the problem of poor light path stability.

[0010] Furthermore, top screw grooves are provided on both sides of the outer end of the laser head mounting block, and the ends of the tightening screws are connected to the top screw grooves. Spring mounting openings are provided on both sides of the inner end of the laser head mounting block, one end of the spring is installed in the spring mounting opening, and the other end is abutted against the inner wall of the heat dissipation shell near the inner end of the laser head mounting block.

[0011] Based on the above, the beneficial effect of the top screw groove is that it accurately bears the top pressure of the end of the tightening screw, realizing the centralized transmission of the angle adjustment force and micron-level displacement control; the beneficial effect of the spring is that it continuously applies reverse thrust to the inner end of the laser head mounting block, forming a dynamic force couple with the top pressure of the outer end of the tightening screw, eliminating the adjustment gap and absorbing vibration shock, thereby realizing self-locking and anti-interference stability after the laser head inclination angle is adjusted.

[0012] Furthermore, the light refraction assembly also includes a refraction guide block, which 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 adjustment member is rotatably arranged at the intersection of the extension lines of the laser input channel and the laser emission opening, and the refraction adjustment member is provided with a refraction mirror corresponding to the intersection of the extension lines. The adjustment interface is a polygonal groove, and the deflection angle adjustment range of the refraction mirror is ±5°.

[0013] Based on the above, the beneficial effect of the refraction guide block is that a closed optical path guiding structure with a 90° turn is constructed through the integrated laser input channel and laser output opening, so that the incident laser is precisely guided to the refraction mirror area under mechanical limit, thereby achieving zero displacement stability and anti-environmental interference of the optical path turning; the beneficial effect of the laser input channel is to physically constrain the original light beam output by the laser head; the beneficial effect of the laser output opening is to provide an unobstructed output path for the refracted laser; the beneficial effect of the refraction mirror is to accurately turn the parallel incident light beam to a vertical output direction through mirror reflection, thereby achieving efficient refracting of dual-band lasers; the beneficial effect of the polygonal groove is to match a special wrench tool, and accurately control the rotation angle of the refraction adjustment part through the torque applied by the tool, thereby avoiding the risk of slipping caused by screwdriver operation, and achieving the repeatability and operational safety of the micron-level angle adjustment of the refraction mirror.

[0014] Furthermore, the composite lens includes a first lens and a second lens, the first lens is provided with a first middle lens, the input part of the first middle lens is a plane, and the output part is a convex surface, the second lens is provided with an inner lens, a second middle lens and an outer lens in sequence 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 an additional lens is also provided outside the first lens corresponding to the input end of the laser injection channel of the refractive guide block, the input part of the additional lens is a plane, and the output part is a convex surface.

[0015] Based on the above, the beneficial effect of the first middle lens is that the input plane is used to receive the laser beam to eliminate the incident distortion, and the convex surface of the output part performs unilateral convergence and compression on the light beam to form a transition beam with a preset divergence angle, thereby achieving primary collimation and energy density improvement of the upper wavelength laser; the beneficial effect of the second lens is that the three-layer structure of the integrated inner lens, the second middle lens and the outer lens is fixed by the stepped limiting groove inside the cavity to form a cascade correction optical path for the lower wavelength laser, thereby achieving compact assembly and axial size compression of multiple lens groups; the beneficial effect of the inner lens is that the refracted laser is received through the input plane to maintain the wavefront integrity, and the convex surface of the output part performs initial convergence, compresses the beam cross-sectional area and corrects the astigmatism caused by the refractive adjustment component, thereby achieving the lower wavelength Primary beam shaping of the laser; the beneficial effect of the second middle lens is that the concave surface of the input part diverges the convergent light beam output by the inner lens to offset the spherical aberration, the output plane reconstructs the wavefront parallelism, eliminates the focus drift caused by the previous stage convergence, and realizes the precise restoration of the beam parallelism; the beneficial effect of the outer lens is that the input plane receives the corrected parallel light to maintain the optical properties, the convex surface of the output part performs the final micro-convergence, matches the external interface standard of the composite lens, and realizes the standardized control of the output spot size and working distance; the beneficial effect of the additional lens is that the original light beam of the laser head is directly received through the input plane to suppress scattering, the convex surface of the output part performs pre-focusing, and reduces the diameter of the light beam before entering the folding component, thereby minimizing the transmission loss of high-energy laser before folding.

[0016] Furthermore, the end surface of the heat dissipation housing is provided with a first laser component mounting groove and a second laser component mounting groove that are longitudinally staggered, and the two laser head mounting blocks are respectively mounted in the first laser component mounting groove and the second laser component mounting groove.

[0017] Based on the above, the beneficial effect of the first laser component mounting groove and the second laser component mounting groove is that the two laser head mounting blocks are installed in a longitudinally staggered manner, avoiding spatial interference of the dual optical paths before folding, and realizing a three-dimensional and compact arrangement of the dual-wavelength laser source; the beneficial effect of the laser head mounting block is that the heat of the laser head is evenly transferred to the heat dissipation shell, and at the same time, the top screw holes and spring mounting ports on both sides thereof form a micro-gap fit with the side walls of the mounting groove, reserving deformation space for inclination adjustment, thereby realizing the compatibility of the laser source thermal management accuracy and the mechanical adjustment function.

[0018] Furthermore, the heat dissipation housing is also provided with a laser head lens limit plate mounting groove, and the laser head lens limit plate mounting groove is located between the first laser component mounting groove and the second laser component mounting groove, the upper end of the laser head lens limit plate mounting groove is provided with a first lens mounting groove and is open to the second laser component mounting groove, and the lower end is provided with a second lens mounting groove and is open to the first laser component 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 component mounting groove and the second laser component mounting groove, and the depth of the laser head lens limit plate mounting groove is less than the depth of the first laser component mounting groove and the second laser component mounting groove.

[0019] Furthermore, a laser head lens limit plate is installed on the laser head lens limit plate mounting groove, and a refraction mirror groove is provided at the position of each laser head mounting block corresponding to the laser head lens limit plate mounting groove, and the refraction guide block is installed in the refraction mirror groove, and the laser injection channel openings of the two refraction guide blocks are both facing the output ends of their respective laser heads, and the laser head lens limit plate is provided with two adjustment member limit holes corresponding to each refraction adjustment member, and the adjustment member limit holes limit the refraction adjustment member.

[0020] Based on the above, the beneficial effect of the laser head lens limit plate installation groove is that the laser head lens limit plate is installed to achieve spatial isolation between the folding component and the laser source and precise positioning of the assembly plane, and the installation of the refraction guide block is constrained by the refraction mirror groove, forcing the laser input channel axis of the refraction guide block to be coaxially aligned with the laser head output end, thereby achieving zero calibration assembly of the folding component and the laser source; the beneficial effect of the refraction guide block is that through its directional layout with the laser input channel opening facing the laser head output end, the original laser beam enters the closed light guide channel without offset, avoiding path deviation caused by refraction at the air interface, and achieving lossless transmission of the laser from emission to folding.

[0021] Furthermore, the heat dissipation shell is also provided with a line-wrap groove, which extends from the outside of the first laser component mounting groove through the lower edge of the heat dissipation shell to the outside of the second laser component mounting groove. The line-wrap groove is provided with an external joint mounting area in the area below the second laser component mounting groove. The two diagonals of the external joint mounting area are respectively provided with mounting steps, and the surfaces of the two mounting steps are provided with internal threaded holes for installing external joints.

[0022] Based on the above, the beneficial effect of the whole-line trough is that the power supply lines of the two laser components are unified through the depth of the trough body, which avoids the cables from hanging or cross-entwining outside the shell, and realizes the concealed integration and anti-pull protection of the circuit routing; the beneficial effect of the external connector installation area is that a rectangular installation platform is formed by expanding the trough width, providing the external connector with an assembly base surface flush with the lower edge of the heat dissipation shell, realizing the standardized embedded installation of the external interface; the beneficial effect of the installation ladder is that the installation height of the external connector is raised by the step plane, so that its terminal is precisely aligned with the side opening of the lower edge of the heat dissipation shell, and at the same time, the side of the step avoids the cable path in the whole-line trough, realizing the staggered spatial isolation of the external connector and the internal circuit.

[0023] Furthermore, a circuit board is provided in the entire line slot, and the circuit board is fixedly mounted on the external connector, and the connection terminal of the external connector is exposed on the side of the lower edge of the heat dissipation shell.

[0024] Furthermore, positioning mounting ports are provided on both sides of the laser emitting surface of the heat dissipation shell, and four threaded holes are provided at the end of the composite lens. The heat dissipation shell is provided with an arc-shaped adjustment port corresponding to the position of each threaded hole, wherein two diagonally arranged threaded holes are fixedly connected to the heat dissipation shell by screws passing through the corresponding arc-shaped adjustment ports, and the other two diagonally arranged threaded holes are above the arc-shaped adjustment ports corresponding to the threaded holes and are not connected with screws. When the fixed screws are loosened, the composite lens can be rotated along the arc-shaped adjustment port to adjust the laser output angle.

[0025] Based on the above, the beneficial effect of the two positioning mounting ports is that the vertical reference surface of the inner wall is tightly matched with the positioning pins of the external equipment, thereby forcibly limiting the initial installation orientation of the composite lens, and realizing zero-deviation mechanical docking between the laser module and the external optical system; the beneficial effect of the arc adjustment port is that the movement trajectory of the screw is limited by the arc length range, so that the composite lens can be rotated ±3° around the arc adjustment port when the screw is loosened, thereby realizing stepless fine-tuning of the output laser angle and maintaining consistency with the optical axis; the beneficial effect of the four threaded holes is that they adopt a diagonal grouping layout, one pair of which is fixed by screws passing through the arc adjustment port, and the other pair is locked without screws, forming a "two-point fixed + two-point floating" constraint system, which releases the rotational freedom during adjustment and maintains the lens plane constraint, thereby realizing anti-dislocation safety control of the composite lens during angle adjustment.

[0026] In order to more clearly illustrate the above features of the present invention and the objects to be achieved, the present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : is a stereogram of the present invention; Figure 2 : is a schematic diagram of the heat dissipation housing of the present invention; Figure 3 : is a three-dimensional schematic diagram of the laser assembly of the present invention; Figure 4 : is a three-dimensional schematic diagram of the laser assembly of the present invention from another perspective; Figure 5 : is a schematic diagram of the composite lens of the present invention; Figure 6 : is a schematic diagram of the first lens of the present invention; Figure 7 : is a schematic diagram of the second lens of the present invention; Figure 8 : Schematic diagram of the distribution positions of the internal lenses of the first lens and the second lens of the present invention.

[0028] Description of the accompanying figures: 1-heat dissipation housing, 11-first laser component mounting slot, 12-second laser component mounting slot, 13-laser head lens limit plate mounting slot, 131-first lens mounting slot, 132-second lens mounting slot, 133-refracting mirror slot, 14-whole line slot, 141-external connector mounting area, 142-mounting ladder, 143-internal threaded hole, 15-arc adjustment port, 16-positioning mounting port, 2-laser assembly, 21-laser head mounting block, 211-top screw slot, 212-spring mounting port, 22-laser head, 3 -Laser head lens limit plate, 31-adjustment part limit hole, 4-light refraction assembly, 41-refractive adjustment part, 411-adjustment interface, 412-refracting mirror, 42-refracting guide block, 421-laser injection channel, 422-laser injection opening, 5-compound lens, 51-first lens, 511-first middle lens, 512-additional lens, 52-second lens, 521-inner lens, 522-second middle lens, 523-outer lens, 53-threaded hole, 6-tightening screw, 7-spring, 8-circuit board, 9-external connector. DETAILED DESCRIPTION

[0029] See also Figures 1-8 As shown, The present invention provides a miniature multi-axis dual-wavelength laser module for adjusting parallel light, comprising a heat dissipation shell 1, on which are provided two longitudinally arranged light refracting components 4 with opposite light refracting ends, a laser component 2 respectively located outside the light refracting ends of the two light refracting components 4, and a compound lens 5 respectively located outside the light refracting ends of the two light refracting components 4. The laser component 2 comprises a laser head mounting block 21 with adjustable tilt 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 with tightening screws 6, and the inner ends are provided with springs 7. The tightening screws 6 are threadedly connected to the heat dissipation shell 1 and are used to cooperate with the spring 7 to adjust the angle of the laser head mounting block 21. The light refracting component 4 comprises a refraction adjustment component 41 provided with an adjustment interface 411.

[0030] The heat dissipation housing 1 is preferably made of copper material with high thermal conductivity, and the wall thickness of the housing is controlled within the range of ≤15mm. This design ensures that when the dual-wavelength laser head is continuously running at full power, the heat generated by the laser head 22 can be quickly transferred to the heat dissipation housing 1 through the laser head mounting block 21, and efficiently diffused inside the housing. When the mounting contact surface of the heat dissipation housing 1 and the external device is fixed to the external device, the heat is not only dissipated by natural convection with the air through the exposed surface of the heat dissipation housing 1, but also efficiently transferred to the heat dissipation structure of the external device by heat conduction, forming a dual heat dissipation path, thereby effectively preventing the laser head 22 from being affected by excessive temperature and affecting performance or life.

[0031] In this embodiment, top screw grooves 211 are provided on both sides of the outer end of the laser head mounting block 21, and the ends of the tightening screws 6 are connected to the top screw grooves 211. Spring mounting openings 212 are provided on both sides of the inner end of the laser head mounting block 21. One end of the spring 7 is installed in the spring mounting opening 212, and the other end is abutted against the inner wall of the heat dissipation housing 1 near the inner end of the laser head mounting block 21.

[0032] In this embodiment, the light refraction assembly 4 also includes a refraction 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 refraction adjustment member 41 is rotatably arranged at the intersection of the extension line of the laser input channel 421 and the laser emission opening 422, and the refraction adjustment member 41 is provided with a refraction mirror 412 corresponding to the intersection of the extension line. The adjustment interface 411 is a polygonal groove, and the deflection angle adjustment range of the refraction mirror 412 can reach ≥±5°. During the calibration process, the external adjustment rod is inserted into the polygonal groove 411 to accurately rotate and adjust the refraction adjustment member 41. The purpose is to ensure that the original light beam emitted from the laser head 22, after being deflected by the refraction mirror 412, the final output laser beam is strictly perpendicular to the mounting surface of the heat dissipation housing 1 in contact with the external device. The angular resolution of the adjustment depends on the effective operating length of the external adjustment rod. The longer the length of the adjustment rod, the higher the control accuracy of the small angle change of the refraction mirror 412.

[0033] In this embodiment, the composite lens 5 includes a first lens 51 and a second lens 52. A first middle lens 511 is provided in the first lens 51. The input portion of the first middle lens 511 is a plane, and the output portion is a convex surface. The second lens 52 is provided with an inner lens 521, a second middle lens 522 and an outer lens 523 in sequence from the laser input side to the laser output side. The input portions of the inner lens 521 and the outer lens 523 are plane, and the output portions are convex surfaces. The input portion of the second middle lens 522 is a concave surface, and the output portion is a plane. An additional lens 512 is also provided outside the first lens 51 at the input end corresponding to the laser injection channel 421 of the refractive guide block 42. The input portion of the additional lens 512 is a plane, and the output portion is a convex surface.

[0034] In this embodiment, the end surface of the heat dissipation housing 1 is provided with a first laser component mounting groove 11 and a second laser component mounting groove 12 which are longitudinally staggered, and the two laser head mounting blocks 21 are respectively installed in the first laser component mounting groove 11 and the second laser component mounting groove 12.

[0035] In this embodiment, the heat dissipation housing 1 is also provided with a laser head lens limit plate mounting groove 13, and the laser head lens limit plate mounting groove 13 is located between the first laser component mounting groove 11 and the second laser component mounting groove 12. The upper end of the laser head lens limit plate mounting groove 13 is provided with a first lens mounting groove 131 and is open to the second laser component mounting groove 12, and the lower end is provided with a second lens mounting groove 132 and is open to the first laser component 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 component mounting groove 11 and the second laser component mounting groove 12, and the depth of the laser head lens limit plate mounting groove 13 is less than the depth of the first laser component mounting groove 11 and the second laser component mounting groove 12.

[0036] In this embodiment, a laser head lens limit plate 3 is installed on the laser head lens limit plate mounting groove 13, and a refraction mirror groove 133 is provided on the laser head lens limit plate mounting groove 13 corresponding to the position of each laser head mounting block 21. The refraction guide block 42 is installed in the refraction mirror groove 133, and the laser injection channels 421 of the two refraction guide blocks 42 are opened toward the output ends of their respective laser heads 22. The laser head lens limit plate 3 is provided with two adjustment member limit holes 31 corresponding to each refraction adjustment member 41, and the adjustment member limit holes 31 limit the refraction adjustment member 41.

[0037] In this embodiment, the heat dissipation housing 1 is further provided with a line-straightening groove 14, which extends from the outside of the first laser component mounting groove 11 through the lower edge of the heat dissipation housing 1 to the outside of the second laser component mounting groove 12. The line-straightening groove 14 is provided with an external joint mounting area 141 in the area below the second laser component mounting groove 12, and the two diagonals of the external joint mounting area 141 are respectively provided with mounting steps 142, and the surfaces of the two mounting steps 142 are provided with internal threaded holes 143 for mounting the external joint 9.

[0038] In this embodiment, a circuit board 8 is provided in the line slot 14 . The circuit board 8 is fixedly mounted on the external connector 9 . The connection terminal of the external connector 9 is exposed on the side of the lower edge of the heat dissipation housing 1 .

[0039] In this embodiment, positioning mounting ports 16 are provided on both sides of the laser emitting surface of the heat dissipation shell 1, and four threaded holes 53 are provided at the end of the compound lens 5. The heat dissipation shell 1 is provided with an arc-shaped adjustment port 15 corresponding to the position of each threaded hole 53, wherein two diagonally arranged threaded holes 53 are fixedly connected to the heat dissipation shell 1 by screws passing through the corresponding arc-shaped adjustment ports 15, and the other two diagonally arranged threaded holes 53 are above the arc-shaped adjustment ports 15 corresponding to the corresponding threaded holes 53 and are not connected with screws. When the fixed screws are loosened, the compound lens 5 can be rotated along the arc-shaped adjustment port 15 to adjust the laser output angle.

[0040] In summary, the specific embodiments of the present invention are as follows: When the miniature multi-axis 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 then is guided to the refractor 412 through the laser injection channel 421 of its corresponding refraction guide block 42. The light beam output by the lower laser head 22 is guided to the refractor 412 through the laser injection channel 421 of its corresponding refraction guide block 42. The refraction adjustment member 41 receives tool operation through the polygonal groove 411, driving the refractor 412 to fine-tune the deflection angle, so that the two light beams are bent 90 degrees and then respectively enter the first lens 51 and the second lens 52 of the composite lens 5. The first middle lens in the first lens 51 receives the light beam through the input plane and eliminates distortion, while the convex surface of the output performs primary collimation. The second lens 52 compresses the light beam through the inner lens, the concave surface of the second middle lens offsets spherical aberration and restores parallelism, and the outer lens slightly converges and shapes the output light spot. In the four threaded holes 53 at the end of the composite lens 5, two diagonal sets of screws are respectively locked in the arc-shaped adjustment port 15 of the heat dissipation housing 1, forming a two-point fixed and two-point floating constraint. When the fixing screws are loosened, the composite lens 5 can rotate ±3° along the arc-shaped adjustment port 15 to achieve stepless calibration of the output angle. The angle adjustment of the laser head mounting block 21 is achieved by operating the tightening screw 6: when the tightening screw 6 is tightened, the outer end of the laser head mounting block 21 is pushed, and the compression spring 7 generates a reverse thrust, forming a force couple to tilt the mounting block around the fulcrum; the elastic restoring force of the spring 7 eliminates the adjustment gap, and the heat dissipation housing 1 avoids double-path interference through the longitudinal staggered layout of the first laser component mounting groove 11 and the second laser component mounting groove 12, while conducting the heat of the laser head 22 to the heat dissipation housing 1 for dissipation. The power supply line of the circuit board 8 in the entire line slot 14 is led out through the external connector 9, and the external connector 9 is fixed to the lower edge of the housing through the internal threaded hole 143 of the mounting step 142, and the terminal is exposed to realize external electrical connection; The positioning installation port 16 cooperates with the positioning pin of the external device to ensure zero deviation of the module installation. The entire optical path is controlled by the closed channel of the refractive guide block 42 and the multi-layer lens group of the composite lens 5, and finally outputs high-parallelism dual-wavelength laser.

[0041] The above description is only the optimal solution embodiment of the present invention and is not intended to limit the present invention. Various modifications or substitutions made by those skilled in the art without departing from the essence and protection scope of the present invention should also be within the protection scope of the present invention.

Claims

1. A miniature multi-axis parallel light adjustment dual-wavelength laser module, comprising a heat dissipation housing (1), characterized in that: The heat dissipation housing (1) is provided with two longitudinally arranged light folding assemblies (4) with light folding ends in opposite directions, a laser assembly (2) located outside the light folding ends of the two light folding assemblies (4), and a composite lens (5) located outside the light folding ends of the two light folding assemblies (4). The laser assembly (2) includes a laser head mounting block (21) with adjustable tilt 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 with tightening screws (6), and the inner ends are provided with springs (7). The tightening screws (6) are threadedly connected to the heat dissipation housing (1) and are used to cooperate with the spring (7) to adjust the tilt angle of the laser head mounting block (21). The light folding assembly (4) includes a refraction adjustment member (41) provided with an adjustment interface (411).

2. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 1, characterized in that: Top screw grooves (211) are provided on both sides of the outer end of the laser head mounting block (21), and the ends of the tightening screws (6) are connected to the top screw grooves (211). Spring mounting openings (212) are provided on both sides of the inner end of the laser head mounting block (21), and one end of the spring (7) is installed in the spring mounting opening (212), and the other end is abutted against the inner wall of the heat dissipation housing (1) near the inner end of the laser head mounting block (21).

3. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 1, characterized in that: The light refracting assembly (4) further comprises a refraction guide block (42), the refraction guide block (42) being provided with a laser injection channel (421) parallel to the laser injection direction and a laser injection opening (422) perpendicular to the laser injection direction, the refraction adjusting member (41) being rotatably arranged at the intersection of the extension lines of the laser injection channel (421) and the laser injection opening (422), and the refraction adjusting member (41) being provided with a refraction mirror (412) corresponding to the intersection of the extension lines, the adjustment interface (411) being a polygonal groove, and the deflection angle adjustment range of the refraction mirror (412) being ±5°.

4. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 1, characterized in that: The composite lens (5) comprises a first lens (51) and a second lens (52), wherein a first middle lens (511) is provided in the first lens (51), wherein the input portion of the first middle lens (511) is a plane, and the output portion is a convex surface, and the second lens (52) is provided in sequence from the laser input side to the laser output side. The input portions of the inner lens (521) and the outer lens (523) are plane, and the output portions are convex surfaces, and the input portion of the second middle lens (522) is a concave surface, and the output portion is a plane, and an additional lens (512) is provided outside the first lens (51) at the input end corresponding to the laser injection channel (421) of the refractive guide block (42), and the input portion of the additional lens (512) is a plane, and the output portion is a convex surface.

5. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 1, characterized in that: The end surface of the heat dissipation housing (1) is provided with a first laser component mounting groove (11) and a second laser component mounting groove (12) arranged in a longitudinal staggered manner, 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).

6. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 5, characterized in that: The heat dissipation housing (1) is further 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 component mounting groove (11) and the second laser component 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 is open to the second laser component mounting groove (12), and the lower end is provided with a second lens mounting groove (132) and is open to the first laser component 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 component mounting groove (11) and the second laser component 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 component mounting groove (11) and the second laser component mounting groove (12).

7. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 6, characterized in that: A laser head lens limiting plate (3) is installed on the laser head lens limiting plate mounting groove (13), and a refraction mirror groove (133) is provided in the laser head lens limiting plate mounting groove (13) corresponding to the position of each laser head mounting block (21), and the refraction guide block (42) is installed in the refraction mirror groove (133), and the laser injection channels (421) of the two refraction guide blocks (42) are opened toward the output end of each laser head (22), and the laser head lens limiting plate (3) is provided with two adjustment member limiting holes (31) corresponding to each refraction adjustment member (41), and the adjustment member limiting holes (31) limit the refraction adjustment member (41).

8. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 6, characterized in that: The heat dissipation housing (1) is further provided with a line-straightening groove (14), which extends from the outside of the first laser component mounting groove (11) through the lower edge of the heat dissipation housing (1) to the outside of the second laser component mounting groove (12), and the line-straightening groove (14) is provided with an external connector mounting area (141) in an area below the second laser component mounting groove (12), and 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).

9. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 8, characterized in that: A circuit board (8) is provided in the line slot (14), and the circuit board (8) is fixedly mounted on the external connector (9), with the connection terminal of the external connector (9) exposed on the side of the lower edge of the heat dissipation housing (1).

10. The miniature multi-axis parallel light adjustment dual-wavelength laser module according to claim 1, characterized in that: Positioning mounting openings (16) are provided on both sides of the laser emitting surface of the heat dissipation housing (1), four threaded holes (53) are provided at the end of the composite lens (5), and arc-shaped adjustment openings (15) are provided at the position of each threaded hole (53) of the heat dissipation housing (1), wherein two diagonally arranged threaded holes (53) are fixedly connected to the heat dissipation housing (1) by screws penetrating the corresponding arc-shaped adjustment openings (15), and the other two diagonally arranged threaded holes (53) are above the arc-shaped adjustment openings (15) corresponding to the corresponding threaded holes (53) and are not connected with screws. When the fixed screws are loosened, the composite lens (5) can be rotated along the arc-shaped adjustment openings (15) to adjust the laser output angle.

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