A coaxial light source and a tunnel light source combination light source structure
By integrating coaxial and tunnel light sources into the same light source structure and utilizing curved reflector walls and diffuser plates, the problem of low light source switching efficiency is solved, achieving high-efficiency detection and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG AOPUTE TECH CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-23
AI Technical Summary
Existing light source devices cannot switch between coaxial light sources and tunnel light sources at the same workstation, resulting in low detection efficiency and high cost.
The coaxial light source and tunnel light source are integrated into the same light source structure. The light source is connected by setting first and second shooting windows and openings. Combined with the design of arc-shaped reflector wall, diffuser plate and lamp beads, the light utilization rate and uniformity are improved.
It enables switching of light sources at the same workstation, improves inspection efficiency, reduces costs, and covers more defect types through global uniform illumination and local texture enhancement.
Smart Images
Figure CN224399722U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of light sources, and in particular to a light source structure that combines a coaxial light source and a tunnel light source. Background Technology
[0002] In machine vision applications for defect detection, tunneling or coaxial lighting is typically used. Coaxial lighting is suitable for micron-level static inspection, such as detecting scratches on metal plating or surface defects. Tunneling lighting, on the other hand, is more commonly used for objects in continuous motion, ensuring uniform, shadowless illumination to highlight their three-dimensional features even at high speeds. Current lighting systems cannot switch between coaxial and tunneling lighting at the same workstation, forcing users to repeatedly install and remove the light source based on specific inspection needs, thus impacting efficiency. To improve efficiency, users must use either coaxial or tunneling lighting at two separate workstations, each with its own camera. This approach is space-consuming and increases costs due to the large number of cameras. Therefore, improvements to existing lighting systems are necessary.
[0003] The above information is provided as background information only to aid in understanding this disclosure, and does not constitute any assertion or admission that any of the above content is prior art relative to this disclosure. Utility Model Content
[0004] This utility model provides a light source structure combining a coaxial light source and a tunnel light source, mainly solving the technical problem of how to integrate a coaxial light source and a tunnel light source into the same light source structure.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A light source structure combining a coaxial light source and a tunnel light source includes a coaxial light source and a tunnel light source; the coaxial light source has a first shooting window, and the tunnel light source has a second shooting window; the coaxial light source has a first opening at the end opposite to the first shooting window, and the tunnel light source has a second opening at the end opposite to the second shooting window; the coaxial light source and the tunnel light source are connected, and the first shooting window, the first opening, the second shooting window, and the second opening are sequentially connected in a straight line.
[0007] In one of the technical solutions, the tunnel light source has a light-emitting chamber inside, and the second shooting window and the second opening are both connected to the light-emitting chamber. The chamber wall of the light-emitting chamber includes an arc-shaped reflective wall that arches away from the second opening. The tunnel light source includes two rows of first LED beads symmetrically arranged in the light-emitting chamber, and the light-emitting paths of the two rows of first LED beads are both directed toward the arc-shaped reflective wall.
[0008] In one of the technical solutions, an arc-shaped diffuser plate is laid on the arc-shaped reflective wall.
[0009] In one of the technical solutions, the arc-shaped diffuser plate has notches at both ends near the second opening, and a row of second LED beads is arranged in each notch.
[0010] In one of the technical solutions, a third row of LEDs is provided below each row of the first LEDs, and the light-emitting path of the third LEDs faces outward from the second opening.
[0011] In one of the technical solutions, the coaxial light source has a mounting cavity, in which a coaxial lamp plate, a planar diffuser plate and a beam splitter are arranged sequentially. The beam splitter is located between the first shooting window and the first opening and is arranged at a 45° angle.
[0012] In one of the technical solutions, a light-absorbing plate is also provided inside the mounting cavity, and the light-absorbing plate is located on the side of the beam splitter facing away from the planar diffuser plate.
[0013] In one of the technical solutions, the coaxial light source has multiple heat dissipation parts protruding on the outer wall of one side corresponding to the coaxial lamp plate, and the light source structure also includes a cooling fan disposed at an adjacent position of the heat dissipation parts.
[0014] Compared with the prior art, the light source structure combining the coaxial light source and the tunnel light source provided by this utility model has at least the following beneficial effects:
[0015] The second imaging window on existing tunnel light sources is usually quite narrow, and the second opening on tunnel light sources is usually quite large. Therefore, this solution utilizes the space above the narrow second imaging window of the tunnel light source to place a coaxial light source, thereby integrating the coaxial light source and the tunnel light source into the same light source structure. In actual use, the camera needs to be placed outside the first imaging window of the coaxial light source, and the object to be detected needs to be placed below the second opening. When the object to be detected is illuminated by the tunnel light source or the coaxial light source, the object to be detected reflects the light upwards, and the emitted light passes through the second opening, the second imaging window, the first opening, and the first imaging window in sequence before entering the camera, so that the camera can capture the image of the object to be detected after being illuminated. The light source structure of this solution integrates both coaxial and tunnel light sources, allowing users to switch between them at the same workstation without repeatedly installing or removing them during inspection, thus improving inspection efficiency. Furthermore, the coaxial and tunnel light sources can be used in conjunction. The coaxial light source provides uniform global illumination and suppresses reflections from the inspected object, while the tunnel light source enhances local textures or edge information on the inspected object. The combination of the two light sources can cover a wider range of defect types. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A schematic diagram of a light source structure combining a coaxial light source and a tunnel light source, provided in an embodiment of this application;
[0018] Figure 2 A schematic diagram of a light source structure combining a coaxial light source and a tunnel light source, provided in an embodiment of this application, when working in conjunction with a camera and the object being detected;
[0019] Figure label:
[0020] 1. Coaxial light source; 11. First imaging window; 12. First opening; 13. Mounting cavity; 14. Coaxial light plate; 15. Planar diffuser plate; 16. Beam splitter; 17. Light-absorbing plate; 18. Heat dissipation unit; 2. Tunnel light source; 21. Second imaging window; 22. Second opening; 23. Light-emitting chamber; 24. Arc-shaped reflector wall; 25. First LED bead; 26. Arc-shaped diffuser plate; 27. Notch; 28. Second LED bead; 29. Third LED bead; 3. Camera; 4. Object being detected; 5. Cooling fan. Detailed Implementation
[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0023] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0024] Furthermore, 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. Thus, 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.
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0026] Please refer to the following: Figure 1 and Figure 2 This utility model embodiment provides a light source structure combining a coaxial light source and a tunnel light source, including a coaxial light source 1 and a tunnel light source 2. The coaxial light source 1 is provided with a first shooting window 11, and the tunnel light source 2 is provided with a second shooting window 21. The coaxial light source 1 is provided with a first opening 12 at the end opposite to the first shooting window 11, and the tunnel light source 2 is provided with a second opening 22 at the end opposite to the second shooting window 21. The coaxial light source 1 is fixedly connected above the tunnel light source 2, and the first shooting window 11, the first opening 12, the second shooting window 21, and the second opening 22 are sequentially connected in a vertical line.
[0027] Specifically, the second shooting window 21 on the existing tunnel light source 2 is usually quite narrow, and the second opening 22 on the tunnel light source 2 is usually quite large. Therefore, this solution utilizes the space above the narrow second shooting window 21 of the tunnel light source 2 to place the coaxial light source 1, thereby integrating the coaxial light source 1 and the tunnel light source 2 into the same light source structure. In actual use, the camera 3 needs to be placed outside the first shooting window 11 of the coaxial light source 1, and the object to be detected 4 needs to be placed below the second opening 22. When the object to be detected 4 is illuminated by the tunnel light source 2 or the coaxial light source 1, the object to be detected 4 reflects the light upward and causes the emitted light to pass through the second opening 22, the second shooting window 21, the first opening 12 and the first shooting window 11 in sequence before entering the interior of the camera 3, so that the camera 3 can capture the image of the object to be detected 4 after it is illuminated. The light source structure of this solution integrates both coaxial light source 1 and tunnel light source 2, allowing users to switch between the two at the same workstation. This eliminates the need to repeatedly install and remove coaxial light source 1 or tunnel light source 2 during inspection, thus improving inspection efficiency. Furthermore, coaxial light source 1 and tunnel light source 2 can be used in conjunction. Coaxial light source 1 can provide uniform global illumination and suppress reflections from the inspected object 4, while tunnel light source 2 can enhance local textures or edge information on the inspected object 4. The combination of the two light sources can cover more defect types.
[0028] Please see Figure 1 or Figure 2 The coaxial light source 1 has a mounting cavity 13, within which a coaxial lamp plate 14, a planar diffuser plate 15, and a beam splitter 16 are arranged sequentially. The beam splitter 16 is positioned between the first shooting window 11 and the first opening 12 at a 45° angle. This type of coaxial light source 1 is existing technology. In use, the coaxial lamp plate 14 emits light, the planar diffuser plate 15 homogenizes the light, and the homogenized light is reflected downwards by the reflective properties of the beam splitter 16. The light reflected by the beam splitter 16 is coaxial with the camera 3. In addition, a light-absorbing plate 17 is also provided in the mounting cavity 13. The light-absorbing plate 17 is located on the side of the beam splitter 16 facing away from the planar diffuser plate 15. The light-absorbing plate 17 is used to absorb the light coming out of the planar diffuser plate 15 and passing through the beam splitter 16, preventing the light from being reflected by the inner wall of the coaxial light source 1 and forming stray light that interferes with the coaxial light illuminating the object 4 being detected. Preferably, the coaxial light source 1 has a plurality of heat dissipation parts 18 protruding on one side of the outer wall of the coaxial lamp plate 14. The light source structure of this embodiment also includes a cooling fan 5 disposed at an adjacent position of the heat dissipation parts 18. With such design, the heat dissipation performance of the light source structure can be improved.
[0029] Please refer to the following: Figure 1 and Figure 2The tunnel light source 2 has a light-emitting chamber 23 inside. The second imaging window 21 is actually located at the top of the light-emitting chamber 23 and communicates with it. The second opening 22 is actually located at the bottom of the light-emitting chamber 23 and communicates with it. The chamber wall of the light-emitting chamber 23 includes an arc-shaped reflective wall 24, which arches away from the second opening 22. The tunnel light source 2 includes two rows of first LED beads 25 disposed inside the light-emitting chamber 23. The two rows of first LED beads 25 are symmetrically arranged inside the second opening 22, and the light emission paths of the two rows of first LED beads 25 are all facing the arc-shaped reflective wall 24. Through multiple reflections of light by the arc-shaped reflective wall 24, light can cover the object 4 being detected from multiple angles, reducing light energy loss, thereby improving light utilization and eliminating shadows in the detection area. In addition, an arc-shaped diffuser plate 26 is preferably laid on the arc-shaped reflective wall 24 to further improve the uniformity of light reflection on the object 4 being detected.
[0030] Please refer to the following: Figure 1 and Figure 2 Because the beam splitter 16 inside the coaxial light source 1 has a semi-transparent and semi-reflective characteristic, when the tunnel light source 2 illuminates the surface of the object being inspected 4, a portion of the light will be reflected and lost by the beam splitter 16 during the process of the object being inspected 4 reflecting the light upwards to the camera 3. That is, the intensity of the light reflected towards the camera 3 will be weakened by the beam splitter 16, resulting in insufficient brightness of the image captured by the camera 3. To solve this problem, this solution sets notches 27 at both ends of the arc-shaped diffuser plate 26 near the second opening 22, and sets a row of second LED beads 28 in each notch 27, which helps to improve the uniformity and brightness of the light hitting the object being inspected 4. In addition, a row of third LED beads 29 is set below each row of first LED beads 25. The light emission path of the third LED beads 29 faces outwards from the second opening 22 and obliquely shines onto the object being inspected 4. This design further improves the uniformity and brightness of the light hitting the object being inspected 4.
[0031] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A light source structure combining a coaxial light source and a tunnel light source, characterized in that, It includes a coaxial light source and a tunnel light source; the coaxial light source is provided with a first shooting window, and the tunnel light source is provided with a second shooting window. The coaxial light source is provided with a first opening at the end opposite to the first shooting window, and the tunnel light source is provided with a second opening at the end opposite to the second shooting window. The coaxial light source and the tunnel light source are connected, and the first shooting window, the first opening, the second shooting window, and the second opening are sequentially connected in a straight line.
2. The light source structure combining the coaxial light source and the tunnel light source as described in claim 1, characterized in that, The tunnel light source has a light-emitting chamber inside. The second shooting window and the second opening are both connected to the light-emitting chamber. The chamber wall of the light-emitting chamber includes an arc-shaped reflective wall that arches away from the second opening. The tunnel light source includes two rows of first LED beads symmetrically arranged in the light-emitting chamber. The light-emitting paths of the two rows of first LED beads are both directed toward the arc-shaped reflective wall.
3. The light source structure combining the coaxial light source and the tunnel light source as described in claim 2, characterized in that, An arc-shaped diffuser plate is laid on the arc-shaped reflective wall.
4. The light source structure combining the coaxial light source and the tunnel light source as described in claim 3, characterized in that, The arc-shaped diffuser plate has notches at both ends near the second opening, and a row of second LED beads is arranged in each notch.
5. The light source structure combining the coaxial light source and the tunnel light source as described in claim 2, characterized in that, Below each row of first LED beads is a row of third LED beads, and the light-emitting path of the third LED beads faces outward from the second opening.
6. The light source structure combining the coaxial light source and the tunnel light source as described in claim 1, characterized in that, The coaxial light source has a mounting cavity, in which a coaxial lamp plate, a planar diffuser plate, and a beam splitter are arranged sequentially. The beam splitter is positioned between the first shooting window and the first opening and is arranged at a 45° angle.
7. The light source structure combining the coaxial light source and the tunnel light source as described in claim 6, characterized in that, The mounting cavity is also provided with a light-absorbing plate, which is located on the side of the beam splitter facing away from the planar diffuser plate.
8. The light source structure combining the coaxial light source and the tunnel light source as described in claim 6, characterized in that, The coaxial light source has multiple heat dissipation parts protruding on one side of the outer wall corresponding to the coaxial lamp plate, and the light source structure also includes a cooling fan disposed at an adjacent position of the heat dissipation parts.