A laser scanning module and a laser marking machine
By employing a laser scanning module with a freeform surface field lens and a glass collimating lens group, combined with a galvanometer and translation mechanism, the speed and cost issues of existing laser marking machines have been resolved, achieving high-precision, large-area laser processing and improved stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO XIANGXIN INFORMATION TECHNOLOGY CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-24
AI Technical Summary
Existing laser marking machines with single-point light sources have slow marking speeds, while dual-mirror light sources are costly and the lenses are prone to deformation, affecting marking quality.
It employs a freeform field lens and a collimating lens group made of glass, combined with a galvanometer to achieve high-speed deflection and beam uniformity. The laser scanning module is moved as a whole through a translation mechanism and integrated onto the same base.
It improves laser processing precision and imaging quality, expands the scanning range, reduces maintenance frequency and cost, and enhances production efficiency and equipment reliability.
Smart Images
Figure CN224543466U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of laser marking technology, and relates to a laser scanning module and a laser marking machine. Background Technology
[0002] Currently, there are two types of light sources for laser marking machines: single-point light sources and dual-galvanometer light sources. Single-point light sources are easy to design and implement, but the marking speed of the entire machine is relatively slow, mainly relying on XY dual-axis motors to drive the light source to move and achieve marking. Dual-galvanometer light sources can achieve fast marking, but the number of parts leads to high costs. At the same time, the field lens group has many lenses, and the light spot at the edge of the field lens is prone to deformation, affecting the marking quality. Therefore, there is considerable room for improvement. Summary of the Invention
[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a laser scanning module and a laser marking machine.
[0004] The objective of this utility model can be achieved through the following technical solution: a laser scanning module, comprising:
[0005] Laser emitter;
[0006] A galvanometer, the incident surface of which is aligned with the output end of the laser emitter;
[0007] A freeform field mirror, the incident surface of which is aligned with the exit surface of the galvanometer;
[0008] The laser emitter can emit laser light toward the galvanometer, and the laser light is reflected by the galvanometer to the freeform field mirror, and then scanned by the freeform field mirror, thereby ensuring that the scanned light spot is uniform.
[0009] In one of the laser scanning modules described above, a collimating lens group is also included. The collimating lens group is located between the laser emitter and the freeform field mirror. The incident surface of the collimating lens group is aligned with the output end of the laser emitter, and the incident surface of the freeform field mirror is aligned with the exit surface of the collimating lens group.
[0010] In one of the laser scanning modules described above, the collimating lens group is a glass component.
[0011] In one of the laser scanning modules described above, the freeform field mirror is a glass component.
[0012] In one of the laser scanning modules described above, a swing mechanism is also included. The galvanometer is connected to the swing mechanism, and the swing mechanism can drive the galvanometer to swing.
[0013] Secondly, a laser marking machine includes a laser scanning module, and further includes a base and a translation mechanism. The laser emitter, the galvanometer, and the freeform field lens are all disposed on the base. The base is connected to the translation mechanism. The translation mechanism can drive the base to move, thereby causing the laser emitter, the galvanometer, and the freeform field lens to move simultaneously.
[0014] In the aforementioned laser marking machine, the translation mechanism is a linear module, a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.
[0015] In the aforementioned laser marking machine, a collimating lens group is also included. The collimating lens group is located between the laser emitter and the freeform field lens. The incident surface of the collimating lens group is aligned with the output end of the laser emitter, and the incident surface of the freeform field lens is aligned with the exit surface of the collimating lens group. The collimating lens group is disposed on the base.
[0016] In the aforementioned laser marking machine, the collimating lens group is a glass component.
[0017] In the aforementioned laser marking machine, the freeform surface field mirror is a glass component.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] 1. By using a freeform field lens (f-theta lens) instead of a field lens composed of multiple spherical or aspherical lens groups, aberrations (such as field curvature, distortion, coma, etc.) can be corrected more effectively, significantly improving the flatness of the scanning field and imaging quality. Combined with a galvanometer to achieve high-speed deflection, it ensures that the focused spot size of the laser is consistent and the energy distribution is uniform at different scanning positions (especially edge areas), improving the precision of laser processing. It is particularly suitable for high-resolution, large-area laser processing scenarios.
[0020] 2. The collimating lens group made of glass exhibits excellent thermal stability and durability during the operation of the whole machine. In long-term, high-frequency marking operations, it can maintain high light transmittance and optical performance, preventing the decline in beam quality caused by material aging or thermal deformation. Compared with resin lenses, the collimating lens group made of glass will not be melted or directly vaporized and perforated, which can ensure the long-term stable operation of the whole machine, reducing maintenance frequency and operating costs.
[0021] 3. The freeform surface field lens made of glass is used as the core optical component of the marking machine. It has a high laser damage threshold and good thermal stability, which can effectively cope with the continuous irradiation of high-power lasers. Even during large-scale movement and long-term operation, it can maintain accurate freeform surface contours and focusing performance, ensuring uniform marking effect throughout the entire field and significantly improving the processing quality and reliability of the equipment.
[0022] 4. By integrating the entire laser scanning module onto the same base and moving it as a whole via a translation mechanism, a large-scale, multi-area laser processing capability is achieved. Compared to small-area marking that relies solely on galvanometer scanning, this structure can overcome the limitations of scanning field size and achieve seamless splicing marking or segmented processing on large workpieces, greatly expanding the application range of the equipment and improving production efficiency.
[0023] 5. The collimating lens group is integrated onto the base and moves with the scanning module as a whole, ensuring the integrity and stability of the optical path system. Regardless of the position of the base, the laser beam is always precisely collimated before entering the galvanometer and freeform field mirror, avoiding optical path deviation caused by external vibration or movement, thus ensuring stability during large-scale movement. Attached Figure Description
[0024] Figure 1 This is an optical path diagram of the laser emitted by the laser scanning module of this utility model.
[0025] Figure 2 This is a schematic diagram of the structure of the laser scanning module of this utility model.
[0026] Figure 3 This is a schematic diagram of the working process of the laser marking machine of this utility model.
[0027] In the diagram, 100 is the laser emitter; 200 is the galvanometer; 300 is the freeform field mirror; 400 is the collimating lens group; 500 is the galvanometer motor; and 600 is the base. Detailed Implementation
[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0030] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
[0034] like Figure 1 , Figure 2 As shown, a laser scanning module includes: a laser emitter 100, a galvanometer 200, and a freeform surface field mirror 300.
[0035] The laser emitter 100 is used to emit lasers.
[0036] The incident surface of the galvanometer 200 is aligned with the output end of the laser emitter 100.
[0037] The incident surface of the freeform field mirror 300 is aligned with the exit surface of the galvanometer 200.
[0038] The laser emitter 100 emits a laser beam toward the galvanometer 200, which is reflected by the galvanometer 200 to the freeform field mirror 300, and then scanned by the freeform field mirror 300, thereby ensuring that the scanned light spot is uniform.
[0039] In this embodiment, by using a freeform field lens (f-theta lens) instead of a field lens composed of multiple spherical or aspherical lens groups, aberrations (such as field curvature, distortion, coma, etc.) can be corrected more effectively, significantly improving the flatness of the scanning field and the imaging quality. Combined with the galvanometer 200 to achieve high-speed deflection, it ensures that the focused spot size of the laser is consistent and the energy distribution is uniform at different scanning positions (especially edge areas), thereby improving the accuracy of laser processing. It is particularly suitable for high-resolution, large-area laser processing scenarios.
[0040] like Figure 1 , Figure 2 As shown, based on the above embodiment, a collimating lens group 400 is also included. The collimating lens group 400 is located between the laser emitter 100 and the freeform field lens 300. The incident surface of the collimating lens group 400 is aligned with the output end of the laser emitter 100, and the incident surface of the freeform field lens 300 is aligned with the exit surface of the collimating lens group 400.
[0041] In this embodiment, the collimating lens group 400 can effectively collimate the diverging beam emitted by the laser emitter 100, forming a parallel or nearly parallel beam that enters the subsequent optical system, reducing light energy loss, improving beam quality, and avoiding focusing deviation and energy attenuation caused by beam divergence.
[0042] like Figure 1 , Figure 2 As shown, based on the above embodiment, the collimating lens group 400 is a glass component.
[0043] In this embodiment, the collimating lens group 400 made of glass exhibits excellent thermal stability and durability during the operation of the whole machine. In long-term, high-frequency marking operations, it can maintain high light transmittance and optical performance, preventing the decline in beam quality caused by material aging or thermal deformation. Compared with lenses made of resin, the collimating lens group 400 made of glass will not be melted or directly vaporized and perforated, which can ensure the long-term stable operation of the whole machine and reduce the maintenance frequency and operating costs.
[0044] like Figure 1 , Figure 2 As shown, based on the above embodiments, the freeform field mirror 300 is a glass component.
[0045] In this embodiment, a freeform surface field lens 300 made of glass is used as the core optical element of the marking machine. It has a high laser damage threshold and good thermal stability, and can effectively cope with continuous irradiation by high-power lasers. Even during large-scale movement and long-term operation, it can maintain accurate freeform surface contours and focusing performance, ensuring uniform marking effect across the entire field and significantly improving the processing quality and reliability of the equipment.
[0046] like Figure 1 , Figure 2 As shown, based on the above embodiment, a swing mechanism is also included. The galvanometer 200 is connected to the swing mechanism, and the swing mechanism can drive the galvanometer 200 to swing.
[0047] Specifically, the swing mechanism can be a galvanometer motor 500.
[0048] In this embodiment, an independent swing mechanism is set to drive the galvanometer 200, thereby causing the galvanometer 200 to swing to achieve scanning, supporting high-speed scanning of complex graphics.
[0049] like Figure 1 , Figure 2 , Figure 3 As shown, a laser marking machine includes a laser scanning module and further includes a base 600 and a translation mechanism (not shown in the figure). The laser emitter 100, the galvanometer 200, and the freeform field lens 300 are all disposed on the base 600. The base 600 is connected to the translation mechanism, which can drive the base 600 to move, thereby causing the laser emitter 100, the galvanometer 200, and the freeform field lens 300 to move simultaneously.
[0050] In this embodiment, the entire laser scanning module is integrated on the same base 600 and moved as a whole by a translation mechanism, realizing large-area, multi-region laser processing capabilities. Compared with small-area marking that only relies on scanning with galvanometer 200, this structure can break through the limitation of scanning field size and realize seamless splicing marking or regional processing on large workpieces, greatly expanding the application range of the equipment and improving production efficiency.
[0051] like Figure 1 , Figure 2 , Figure 3 As shown, based on the above embodiments, the translation mechanism is a linear module, a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.
[0052] In this embodiment, the beneficial effects are: the translation mechanism can use a variety of mature driving methods to meet the needs of different application scenarios, each with its own advantages and disadvantages. For example: linear modules can provide smooth movement with high precision and high repeatability; electric cylinders have a compact structure, large thrust, and are easy to control; pneumatic cylinders and hydraulic cylinders have fast response and low cost, and are suitable for situations requiring multiple simple reciprocating movements.
[0053] like Figure 1 , Figure 2 , Figure 3 As shown, based on the above embodiment, a collimating lens group 400 is also included. The collimating lens group 400 is located between the laser emitter 100 and the freeform field mirror 300. The incident surface of the collimating lens group 400 is aligned with the output end of the laser emitter 100, and the incident surface of the freeform field mirror 300 is aligned with the exit surface of the collimating lens group 400. The collimating lens group 400 is disposed on the base 600.
[0054] In this embodiment, the collimating lens group 400 is integrated onto the base 600 and moves with the scanning module as a whole, ensuring the integrity and stability of the optical path system. Regardless of the position of the base 600, the laser beam is always precisely collimated before entering the galvanometer 200 and the freeform field mirror 300, avoiding optical path deviation caused by external vibration or movement, thereby ensuring stability during large-scale movement.
[0055] like Figure 1 , Figure 2 , Figure 3 As shown, based on the above embodiment, the collimating lens group 400 is a glass component.
[0056] In this embodiment, the collimating lens group 400 made of glass exhibits excellent thermal stability and durability during the operation of the whole machine. In long-term, high-frequency marking operations, it can maintain high light transmittance and optical performance, preventing the decline in beam quality caused by material aging or thermal deformation. Compared with lenses made of resin, the collimating lens group 400 made of glass will not be melted or directly vaporized and perforated, which can ensure the long-term stable operation of the whole machine and reduce the maintenance frequency and operating costs.
[0057] like Figure 1 , Figure 2 , Figure 3 As shown, based on the above embodiments, the freeform field mirror 300 is a glass component.
[0058] In this embodiment, a freeform surface field lens 300 made of glass is used as the core optical element of the marking machine. It has a high laser damage threshold and good thermal stability, and can effectively cope with continuous irradiation by high-power lasers. Even during large-scale movement and long-term operation, it can maintain accurate freeform surface contours and focusing performance, ensuring uniform marking effect across the entire field and significantly improving the processing quality and reliability of the equipment.
Claims
1. A laser scanning module, characterized in that, include: Laser emitter; A galvanometer, the incident surface of which is aligned with the output end of the laser emitter; A freeform field mirror, the incident surface of which is aligned with the exit surface of the galvanometer; The laser emitter can emit laser light toward the galvanometer, and the laser light is reflected by the galvanometer to the freeform field mirror, and then scanned by the freeform field mirror, thereby ensuring that the scanned light spot is uniform.
2. The laser scanning module as described in claim 1, characterized in that: It also includes a collimating lens group, which is located between the laser emitter and the freeform field mirror. The incident surface of the collimating lens group is aligned with the output end of the laser emitter, and the incident surface of the freeform field mirror is aligned with the exit surface of the collimating lens group.
3. A laser scanning module as described in claim 2, characterized in that: The collimating lens group is made of glass.
4. A laser scanning module as described in claim 1, characterized in that: The freeform surface field mirror is made of glass.
5. A laser scanning module as described in claim 1, characterized in that: It also includes a swing mechanism, the galvanometer is connected to the swing mechanism, and the swing mechanism can drive the galvanometer to swing.
6. A laser marking machine, characterized in that, The laser scanning module as described in claim 1 further includes: a base and a translation mechanism, wherein the laser emitter, the galvanometer, and the freeform field mirror are all disposed on the base, the base is connected to the translation mechanism, and the translation mechanism can drive the base to move, thereby causing the laser emitter, the galvanometer, and the freeform field mirror to move simultaneously.
7. A laser marking machine as described in claim 6, characterized in that: The translation mechanism is a linear module, a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.
8. A laser marking machine as described in claim 6, characterized in that: It also includes a collimating lens group, which is located between the laser emitter and the freeform field mirror. The incident surface of the collimating lens group is aligned with the output end of the laser emitter, and the incident surface of the freeform field mirror is aligned with the exit surface of the collimating lens group. The collimating lens group is disposed on the base.
9. A laser marking machine as described in claim 8, characterized in that: The collimating lens group is made of glass.
10. A laser marking machine as described in claim 6, characterized in that: The freeform surface field mirror is made of glass.