Laser welding imaging coaxial optical path integration system

Abstract

The utility model relates to a laser welding imaging coaxial light path integration system. The light path integration system comprises a collimation laser emitter, a laser shaper, a zoom lens assembly, a galvanometer and a field lens which are sequentially arranged in the direction of an imaging light path. The zoom lens assembly is arranged on a laser light path coaxial with the imaging light path; the optical path integration system further comprises a temperature measuring instrument and a focusing lens. The temperature measuring instrument and the focusing lens are sequentially arranged on a temperature measuring light path which is coaxial with the laser light path and the imaging light path; the laser shaper is used for shaping the collimated laser beam into a flat-top square light spot; and the zoom lens assembly is a lens assembly capable of realizing a stepless zoom function within 20 times. Compared with the prior art, the utility model has the advantages of large adjusting multiplying power, coaxial design of laser, temperature measurement and imaging three optical paths, integration of multiple functions, meeting of the requirements of diversified application scenes, and the like.

Description

Technical Field

[0001] This utility model relates to the field of laser welding imaging technology, and in particular to a coaxial optical path integrated system for laser welding imaging. Background Technology

[0002] In existing optical systems, the adjustment of spot shape, size, and zoom capability is often limited by technological bottlenecks, making it difficult to meet the needs of diverse application scenarios. At the same time, traditional optical systems often suffer from low integration, complex operation, and high cost when integrating multiple functions.

[0003] For example, the continuous zoom handheld laser welding optical path structure provided by patent CN218775891U does not integrate multiple functions such as laser, temperature measurement and imaging. It is only a single laser welding. Moreover, due to technical bottlenecks, the magnification range of its optical system is small and cannot meet the needs of a wider range of applications.

[0004] Therefore, it is particularly important to develop an optical system that can overcome the above-mentioned defects and provide high efficiency, precision, multi-functionality and cost-effectiveness. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide a coaxial optical path integrated system for laser welding imaging.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A coaxial optical path integrated system for laser welding imaging is disclosed. The system comprises a collimating laser emitter, a laser shaper, a zoom lens assembly, a galvanometer, and a field lens, arranged sequentially along the imaging optical path. The zoom lens assembly is positioned on the laser optical path coaxial with the imaging optical path. The system also includes a temperature measuring instrument and a focusing lens. The temperature measuring instrument and focusing lens are sequentially positioned on the temperature measuring optical path coaxial with both the laser optical path and the imaging optical path. The laser shaper is a laser shaper that shapes the collimated laser beam into a flat-topped square spot. The zoom lens assembly is a lens assembly capable of stepless zoom up to 20x.

[0008] Furthermore, the collimated laser emitter is a laser emitter designed to emit collimated laser beams with a spot size of 2.5 mm and a laser beam quality of 1.1-1.2.

[0009] Furthermore, the laser shaper is a 3×3mm laser shaper with a divergence angle of less than 0.08.

[0010] Furthermore, the zoom lens assembly includes a front lens, a zoom lens, a compensation lens, a filter, and a rear lens arranged in sequence, wherein the front lens, the filter, and the rear lens are fixed, while the zoom lens and the compensation lens can move back and forth along the optical path.

[0011] Furthermore, the zoom lens assembly is a lens assembly that can precisely adjust the spot size between 0.05 mm and 1 mm.

[0012] Furthermore, the galvanometer is a galvanometer with a light transmission requirement of more than 14mm and an internal optical path of 46mm.

[0013] Furthermore, the field lens is a field lens with a focal length of 163mm and an entrance pupil distance greater than 14mm; the field lens is a field lens whose entrance pupil distance is matched with the internal optical path of the galvanometer.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) This utility model integrates three functions, namely laser, temperature measurement and imaging, into one optical system and adopts a coaxial optical path design to realize the integration of multiple functions. Under the guidance of the flat-top square light spot, the laser optical path is used for precise pointing and cutting and welding operations; the temperature measurement optical path is used to monitor the temperature of the target object in real time; and the imaging optical path is used to capture a clear image of the target object. This three-optical-path coaxial design not only improves the integration and compactness of the optical system, but also provides users with a more convenient and efficient operating experience.

[0016] (2) This utility model converts the collimated laser into a flat-top square spot through a laser shaper, and then adjusts the zoom lens assembly to make the spot size precisely adjustable between 0.05 mm and 1 mm. It can achieve continuous stepless zoom within a 20x range and can be changed arbitrarily to achieve smooth and continuous spot size adjustment, which improves the flexibility and adaptability of the optical system and meets the user's fine adjustment needs under different working conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the optical path integrated system structure provided by this utility model;

[0018] Figure 2 This is a schematic diagram illustrating the effect of light spot imaging provided by this utility model;

[0019] Figure 3 This is a schematic diagram of the 20x zoom structure provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the stepless zoom structure provided by this utility model.

[0021] The labels in the diagram indicate:

[0022] 1. Collimating laser emitter; 2. Laser shaper; 3. Zoom lens assembly; 301. Front lens; 302. Zoom lens; 303. Compensation lens; 304. Filter; 305. Rear lens; 4. Galvanometer; 5. Field lens; 6. Temperature measuring instrument; 7. Focusing lens. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] It should be noted 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] Example

[0030] like Figure 1 As shown, a coaxial optical path integrated system for laser welding imaging is disclosed. The system includes a collimated laser emitter 1, a laser shaper 2, a zoom lens assembly 3, a galvanometer 4, and a field lens 5, arranged sequentially along the imaging optical path. The collimated laser emitter 1 is designed to emit a collimated laser beam with a spot size of 2.5 mm and a beam quality M2 (1.1-1.2). The laser shaper 2 shapes the collimated laser beam into a flat-topped square spot with a size of 3 × 3 mm and a divergence angle less than 0.08 (full angle). The galvanometer 4 is a light-transmitting... The system requires a galvanometer with a focal length greater than 14mm and an internal optical path length of 46mm; the field lens 5 is a field lens with a focal length of 163mm and an entrance pupil distance greater than 14mm, with the entrance pupil distance and the internal optical path length of the galvanometer 4 designed to match; the zoom lens assembly 3 is positioned on the laser optical path coaxial with the imaging optical path direction; the zoom lens assembly 3 includes a front lens 301, a zoom lens 302, a compensation lens 303, a filter 304, and a rear lens 305 arranged sequentially, wherein the front lens 301, filter 304, and rear lens 305 are fixed, while the zoom lens 302 and compensation lens 305 are fixed. 03 can reciprocate along the optical path direction, and the movement is achieved through a mechanical cam commonly used in the field; the zoom lens assembly 3 can precisely adjust the spot size between 0.05 mm and 1 mm, thereby achieving stepless zoom function within 20x; the optical path integrated system also includes a temperature measuring instrument 6 and a focusing lens 7; the temperature measuring instrument 6 and the focusing lens 7 are sequentially arranged on the temperature measuring optical path coaxial with the laser optical path and the imaging optical path; the optical path integrated system of this utility model is also connected to a control system, which monitors and adjusts the parameters of the optical path integrated system in real time; under the guidance of a flat-top square spot, this utility model integrates laser, temperature measurement and imaging functions into one optical system, realizing multi-functional integration. Through precise optical path design and special optical components, the coaxiality of the laser, temperature measurement and imaging optical paths is ensured. This design improves the integration and compactness of the system, while providing users with a more convenient and efficient operating experience. The laser optical path is used for precise pointing and cutting operations; the temperature measuring optical path is used to monitor the temperature of the target object in real time during the welding process; the imaging optical path is used to capture a clear image of the target object during the welding process, providing feedback for the welding operation.

[0031] like Figures 2-4As shown, the optical path integration system of this invention can precisely magnify the size of a flat-top square light spot from 0.05 mm to 1 mm, achieving a magnification of up to 20 times. This high-precision spot adjustment capability allows the optical system to flexibly adjust the spot size according to actual needs in different application scenarios, thereby meeting diverse application requirements. Besides precise size control, another significant advantage of the flat-top square light spot is its continuous stepless magnification capability, from... Figure 3 and Figure 4 As can be seen, the optical system achieves a zoom ratio of 20:1. This means that within a range of 0.05 mm to 1 mm, the flat-top beam can be arbitrarily transformed by simply adjusting the positions of the zoom lens 302 and the compensation lens 303, achieving smooth and continuous beam size adjustment. This stepless zoom characteristic not only improves the flexibility and adaptability of the optical system but also provides more precise and accurate optical control methods for scientific research, industrial manufacturing, and other fields. The application of the flat-top square beam in optical systems is also reflected in its unique energy distribution characteristics. Compared with traditional circular beams, the flat-top square beam has a more uniform energy distribution, enabling more efficient utilization of laser energy. This uniform energy distribution characteristic gives the flat-top square beam higher processing efficiency and better processing quality in laser processing, laser welding, and other fields. Furthermore, the flat-top square beam also has a smaller diffraction effect and better directionality. During laser transmission, the flat-top square beam can better maintain its shape and size, reducing energy loss and beam deformation caused by diffraction effects. At the same time, the flat-top square spot has better directionality, which can more accurately point to the target object, improving the utilization rate of the laser and the processing accuracy.

[0032] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A coaxial optical path integrated system for laser welding imaging, characterized in that, The optical path integration system includes a collimating laser emitter (1), a laser shaper (2), a zoom lens assembly (3), a galvanometer (4), and a field lens (5) arranged sequentially along the imaging optical path. The zoom lens assembly (3) is arranged on the laser optical path coaxial with the imaging optical path. The optical path integration system also includes a temperature measuring instrument (6) and a focusing lens (7). The temperature measuring instrument (6) and the focusing lens (7) are arranged sequentially on the temperature measuring optical path coaxial with the laser optical path and the imaging optical path. The laser shaper (2) is a laser shaper that shapes the collimated laser beam into a flat-top square spot. The zoom lens assembly (3) is a lens assembly that can achieve stepless zoom function up to 20 times.

2. The laser welding imaging coaxial optical path integrated system according to claim 1, characterized in that, The collimated laser emitter (1) is a laser emitter designed to emit collimated laser beams with a spot size of 2.5 mm and a laser beam quality of 1.1-1.

2.

3. The laser welding imaging coaxial optical path integrated system according to claim 1, characterized in that, The laser shaping device (2) is a laser shaping device with a size of 3×3mm and a divergence angle of less than 0.

08.

4. The laser welding imaging coaxial optical path integrated system according to claim 1, characterized in that, The zoom lens assembly (3) includes a front lens (301), a zoom lens (302), a compensation lens (303), a filter (304), and a rear lens (305) arranged in sequence. The front lens (301), the filter (304), and the rear lens (305) are fixed, while the zoom lens (302) and the compensation lens (303) can move back and forth along the optical path.

5. The laser welding imaging coaxial optical path integrated system according to claim 4, characterized in that, The zoom lens assembly (3) is a lens assembly that can precisely adjust the spot size between 0.05 mm and 1 mm.

6. The laser welding imaging coaxial optical path integrated system according to claim 1, characterized in that, The galvanometer (4) is a galvanometer with a light transmission requirement of more than 14 mm and an internal optical path of 46 mm.

7. The laser welding imaging coaxial optical path integrated system according to claim 6, characterized in that, The field lens (5) is a field lens with a focal length of 163mm and an entrance pupil distance greater than 14mm; the field lens (5) is a field lens designed to match the entrance pupil distance with the internal optical path of the oscillating lens (4).

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