An integrated laser optical system

Abstract

This invention provides an integrated laser optical system, comprising a frame and a laser optical module, a global vision module, and a 3D vision module mounted on the frame. The laser optical module includes a laser incident component, a galvanometer component, a field lens component, and a beam combiner component, sequentially distributed along the laser incident direction. The beam combiner component includes a tilted beam combiner lens. The global vision module is positioned on one side of the beam combiner lens. The side of the beam combiner lens facing the field lens has a first coating for laser reflection, and the side facing the global vision module has a second coating for direct illumination of camera incident light. The laser reflection range of the beam combiner lens, the field of view of the global vision module, and the field of view of the 3D vision module all face the working area. This invention can meet the marking requirements of complex workpieces and high precision from a top-down view of the working area.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to an integrated laser optical system. Background Technology

[0002] Laser marking, an important application in the field of laser processing, uses high-energy-density laser light to locally irradiate a workpiece, causing the surface material to vaporize or change color, thus leaving a permanent mark. It can produce a variety of texts, symbols, and patterns, with a wide range of character sizes, and is suitable for various materials. It also boasts advantages such as non-contact processing, no workpiece deformation, and no internal stress.

[0003] However, traditional laser marking has limitations when dealing with complex workpieces or high-precision marking requirements. Accuracy is difficult to guarantee due to workpiece tolerances and random positional factors. With increasing demands for automation and high precision in industrial production, and constrained by the installation location of laser optical systems, there is an urgent need for a laser optical system that is installed in the work area from a top-down view and integrates vision capabilities. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides an integrated laser optical system that meets the marking requirements for complex workpieces and high precision from a top-down view of the working area.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In a first aspect, this utility model provides an integrated laser optical system, including a frame and a laser optical module, a global vision module and a three-dimensional vision module disposed on the frame. The laser optical module includes a laser incident component, a galvanometer component, a field lens component and a beam combiner component distributed sequentially along the laser incident direction.

[0007] The beam combining assembly includes a tilted beam combining mirror, the global vision module is disposed on one side of the beam combining mirror, the side of the beam combining mirror facing the field lens has a first coating for laser reflection, and the side of the beam combining mirror facing the global vision module has a second coating for direct illumination of camera incident light.

[0008] The laser reflection range of the beam combiner, the field of view of the global vision module, and the field of view of the three-dimensional vision module are all oriented toward the working area.

[0009] The beneficial effects of this utility model are as follows: by using a beam combiner, the field of view of the global vision module and the irradiation range of the laser are overlapped on the working area. At the same time, the field of view of the three-dimensional vision module is also facing the working area. Therefore, by installing it directly above the working area, the laser optical module, the global vision module, and the three-dimensional vision module can perform full-field workpiece identification and positioning, three-dimensional trajectory generation, and local image archiving, etc., based on the top-down view of the working area, thereby meeting the marking requirements of complex workpieces and high precision under the top-down view of the working area.

[0010] Optionally, the laser incident assembly includes a laser incident head and a laser incident clamping block, wherein the laser incident head is clamped within the laser incident clamping block, and the laser incident clamping block is mounted on the frame.

[0011] Optionally, the laser optical module further includes a galvanometer side mount, through which the galvanometer assembly is mounted on the frame.

[0012] Optionally, the beam combining assembly further includes a beam combining fixing seat, an adjusting seat, multiple adjusting bolts, and multiple locking devices. The beam combining mirror is mounted on the adjusting seat. The adjusting bolts are threaded to the adjusting seat and pass through the adjusting seat. One end of the adjusting bolt passing through the adjusting seat abuts against the inclined side of the beam combining fixing seat. The locking devices are simultaneously fastened to the beam combining fixing seat and the adjusting seat.

[0013] Optionally, the locking device includes a first fixing pin, a tension spring, and a second fixing pin. One end of the tension spring is located inside the bundle fixing seat and is fixed by the first fixing pin, and the other end of the tension spring is located inside the adjusting seat and is fixed by the second fixing pin.

[0014] Optionally, the global vision module includes a global mount and a global camera, wherein the global camera is mounted on the frame via the global mount.

[0015] Optionally, the three-dimensional vision module includes a three-dimensional mounting base, a first three-dimensional camera, a second three-dimensional camera, and a structured light engine. The first three-dimensional camera, the second three-dimensional camera, and the structured light engine are mounted on the three-dimensional mounting base, and the field of view of the structured light engine, the first three-dimensional camera, and the second three-dimensional camera faces the working area.

[0016] Optionally, it also includes a laser ranging module, which includes a laser rangefinder and a ranging mount, wherein the laser rangefinder is mounted on the frame via the ranging mount.

[0017] Optionally, the frame is a base plate, and the laser optics module, global vision module, and 3D vision module are all located on the base plate.

[0018] Optionally, the base plate has openings at corresponding locations of the laser optics module, the global vision module, and the 3D vision module. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an integrated laser optical system according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of an integrated laser optical system according to an embodiment of the present invention from another perspective;

[0021] Figure 3 This is a partial schematic diagram of the laser optical module involved in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the bundle combining assembly according to an embodiment of the present utility model;

[0023] Figure 5 This is a partial cross-sectional schematic diagram of the beam combining component according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the field of view of the laser optical module and the global vision module involved in the embodiments of this utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the global vision module involved in an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the three-dimensional vision module involved in an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the laser ranging module involved in an embodiment of the present utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Frame; 11. Base plate; 12. Opening;

[0030] 2. Laser optical module; 21. Laser incident clamping block; 22. Galvanometer assembly; 23. Field lens assembly; 24. Beam combiner assembly; 241. Beam combiner lens; 242. Beam combiner fixing base; 243. Adjusting base; 244. Adjusting bolt; 245. First fixing pin; 246. Tension spring; 247. Second fixing pin; 25. Galvanometer side mount;

[0031] 3. Global vision module; 31. Global mounting base; 32. Global camera;

[0032] 4. 3D vision module; 41. 3D mounting base; 42. First 3D camera; 43. Second 3D camera; 44. Structured light engine;

[0033] 5. Laser ranging module; 51. Laser rangefinder; 52. Rangefinder mounting base. Detailed Implementation

[0034] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0035] Example 1

[0036] Please refer to Figures 1 to 9 An integrated laser optics system includes a frame 1 and a laser optics module 2, a global vision module 3, and a 3D vision module 4 mounted on the frame 1. The frame 1 is a base plate 11, and the laser optics module 2, global vision module 3, and 3D vision module 4 are all located on the base plate 11. Figure 2 It can be seen that the base plate 11 has openings 12 at the corresponding positions of the laser optical module 2, the global vision module 3 and the three-dimensional vision module 4, so that the laser optical module 2, the global vision module 3 and the three-dimensional vision module 4 can illuminate the working area through the openings 12.

[0037] In this embodiment, the laser optics module 2 is used for functions such as laser injection, beam expansion, dynamic focusing, and reflection. For example... Figure 3 It is known that the laser optical module 2 includes a galvanometer side mount 25 and a laser incident assembly, a galvanometer assembly 22, a field lens assembly 23, and a beam combiner assembly 24, which are distributed sequentially along the laser incident direction. Among them, the laser incident assembly includes a laser incident head and a laser incident clamping block 21. The laser incident head is clamped in the laser incident clamping block 21, and the laser incident clamping block 21 is mounted on the frame 1. The galvanometer assembly 22 is mounted on the frame 1 through the galvanometer side mount 25.

[0038] The galvanometer assembly 22 and the field lens assembly 23 can both achieve their respective functions using existing components.

[0039] Reference Figure 4-6As can be seen, the beam combining assembly 24 includes a beam combining mirror 241 with an inclined design, a beam combining fixing base 242, an adjusting base 243, multiple adjusting bolts 244, and multiple locking devices. The beam combining mirror 241 is mounted on the adjusting base 243. The adjusting bolts 244 are threadedly connected to the adjusting base 243 and pass through the adjusting base 243. One end of the adjusting bolt 244 passing through the adjusting base 243 abuts against the inclined side of the beam combining fixing base 242. The locking devices are simultaneously and securely connected to both the beam combining fixing base 242 and the adjusting base 243. In this embodiment, one adjusting bolt 244 and one locking device are respectively provided at each of the four corners of the adjusting base 243 to achieve flexible adjustment of the adjusting base 243. In this embodiment, the laser reflection range of the beam combining mirror 241, the field of view direction of the global vision module 3, and the field of view direction of the three-dimensional vision module 4 are oriented towards the working area.

[0040] Specifically, the locking device includes a first fixing pin 245, a tension spring 246, and a second fixing pin 247. One end of the tension spring 246 is located inside the bundle fixing seat 242 and is fixed by the first fixing pin 245, while the other end of the tension spring 246 is located inside the adjusting seat 243 and is fixed by the second fixing pin 247.

[0041] Therefore, by screwing in the bolt to hold the beam-combining fixing seat 242, the position of the adjusting seat 243 is adjusted to adjust the spatial attitude of the beam-combining mirror 241. The first fixing pin 245, the tension spring 246 and the second fixing pin 247 are threaded together to tighten and fix the beam, thereby mechanically adjusting the laser head centering and the perpendicularity of the optical path.

[0042] Reference Figure 6 It can be seen that the global vision module 3 is located on one side of the beam combiner 241, that is... Figure 6 On the upper side of the beam combiner 241, the side facing the field lens has a first coating for laser reflection, and the side facing the global vision module 3 has a second coating for direct illumination of the camera's incident light. Thus, the beam combiner 241 utilizes the selective beam-splitting characteristics of the optical coating, combined with a specific optical path angle design, such as a 45° tilt in this embodiment. On one hand, for the laser wavelength: the first coating is designed with high reflectivity, allowing the incident laser to reach the first coating from right to left and then be reflected onto the working area directly below for laser marking. On the other hand, for the incident light wavelength required by the camera: the second coating is designed with high transmittance, allowing the coaxial vision module to directly illuminate the working area from top to bottom. The design of the beam combiner 241 achieves a coaxial design between the laser and the camera, with both the laser's incident area and the coaxial vision module's illumination area located directly above the working area.

[0043] In this embodiment, the global vision module 3 is used to acquire global images of the work area from a top-down perspective, and can further perform functions such as workpiece positioning and workpiece recognition. Figure 7It can be seen that the global vision module 3 includes a global mounting base 31 and a global camera 32, and the global camera 32 is mounted on the frame 1 through the global mounting base 31.

[0044] In this embodiment, the 3D vision module 4 is used to acquire 3D data of the working area, and further for 3D positioning of the workpiece, 3D trajectory generation, etc. Figure 8 As can be seen, the 3D vision module 4 includes a 3D mounting base 41, a first 3D camera 42, a second 3D camera 43, and a structured light engine 44. The first 3D camera 42, the second 3D camera 43, and the structured light engine 44 are mounted on the 3D mounting base 41, and the field of view of the structured light engine 44, the first 3D camera 42, and the second 3D camera 43 are oriented towards the working area. Among them, the first 3D camera 42 and the second 3D camera 43 realize binocular stereo vision, and the structured light engine 44 is used to project programmable structured light to assist binocular stereo vision in completing 3D data calculation.

[0045] In this embodiment, the laser ranging module 5 is used to perform laser ranging on the working area or workpiece to guide the laser to select the focusing position, guide the global camera 32 to focus, and guide the external axis to adjust the working distance. Figure 9 It can be seen that the laser ranging module 5 includes a laser rangefinder 51 and a ranging mounting base 52. The laser rangefinder 51 is mounted on the frame 1 through the ranging mounting base 52.

[0046] Therefore, in this embodiment, the global vision module 3 is used to perform two-dimensional imaging from a global top-down perspective. The two-dimensional images can be uploaded to computer software for global workpiece recognition, workpiece positioning, marking pattern alignment, or automatic planar positioning of the workpiece. The three-dimensional vision module 4 is used for three-dimensional imaging. The three-dimensional imaging data can be used to attach the marking pattern to the workpiece surface, forming a laser processing trajectory. At the same time, the laser ranging module 5 provides distance to guide the laser to select the focusing position, guide the global camera 32 to focus, and guide the external axis to adjust the working distance.

[0047] In summary, this invention can simultaneously achieve full-field two-dimensional and three-dimensional imaging of the working area from a top-down perspective, which can better realize the effects of workpiece identification and positioning and three-dimensional trajectory generation during laser processing, thereby meeting the marking requirements of complex workpieces and high precision under the top-down perspective of the working area.

[0048] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated laser optical system, characterized in that, It includes a frame and a laser optical module, a global vision module and a three-dimensional vision module disposed on the frame. The laser optical module includes a laser incident component, a galvanometer component, a field lens component and a beam combiner component distributed sequentially along the laser incident direction. The beam combining assembly includes a tilted beam combining mirror, the global vision module is disposed on one side of the beam combining mirror, the side of the beam combining mirror facing the field lens has a first coating for laser reflection, and the side of the beam combining mirror facing the global vision module has a second coating for direct illumination of camera incident light. The laser reflection range of the beam combiner, the field of view of the global vision module, and the field of view of the three-dimensional vision module are all oriented toward the working area.

2. The integrated laser optical system according to claim 1, characterized in that, The laser incident assembly includes a laser incident head and a laser incident clamping block, wherein the laser incident head is clamped within the laser incident clamping block, and the laser incident clamping block is mounted on the frame.

3. The integrated laser optical system according to claim 1, characterized in that, The laser optics module also includes a galvanometer side mount, and the galvanometer assembly is mounted on the frame via the galvanometer side mount.

4. The integrated laser optical system according to claim 1, characterized in that, The beam combining assembly also includes a beam combining fixing seat, an adjusting seat, multiple adjusting bolts, and multiple locking devices. The beam combining mirror is mounted on the adjusting seat. The adjusting bolts are threaded to the adjusting seat and pass through the adjusting seat. One end of the adjusting bolt passing through the adjusting seat abuts against the inclined side of the beam combining fixing seat. The locking devices are simultaneously fastened to the beam combining fixing seat and the adjusting seat.

5. An integrated laser optical system according to claim 4, characterized in that, The locking device includes a first fixing pin, a tension spring, and a second fixing pin. One end of the tension spring is located inside the bundle fixing seat and is fixed by the first fixing pin, while the other end of the tension spring is located inside the adjusting seat and is fixed by the second fixing pin.

6. The integrated laser optical system according to claim 1, characterized in that, The global vision module includes a global mount and a global camera, with the global camera mounted on the frame via the global mount.

7. An integrated laser optical system according to claim 6, characterized in that, The three-dimensional vision module includes a three-dimensional mounting base, a first three-dimensional camera, a second three-dimensional camera, and a structured light engine. The first three-dimensional camera, the second three-dimensional camera, and the structured light engine are mounted on the three-dimensional mounting base, and the field of view of the structured light engine, the first three-dimensional camera, and the second three-dimensional camera faces the working area.

8. An integrated laser optical system according to claim 4, characterized in that, It also includes a laser ranging module, which includes a laser rangefinder and a ranging mount, wherein the laser rangefinder is mounted on the frame via the ranging mount.

9. An integrated laser optical system according to any one of claims 1 to 8, characterized in that, The frame is a base plate, and the laser optics module, global vision module, and 3D vision module are all located on the base plate.

10. An integrated laser optical system according to claim 9, characterized in that, The base plate has openings at the corresponding locations of the laser optics module, the global vision module, and the 3D vision module.

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