Detection light source and detection device

Abstract

The present application relates to a detection light source and a detection device. The detection light source comprises: a combined light source comprising a coaxial light source and a ring light source group, the ring light source group being fixedly connected to one axial end of the coaxial light source and comprising at least two first ring light sources which are sequentially arranged in the axial direction; and a second ring light source located at the end of the ring light source group away from the coaxial light source in the axial direction and capable of moving relative to the combined light source in the axial direction, wherein included angles formed between the light exit directions of the ring light sources and the axial direction are different. The included angles formed between the light exit directions of the ring light sources and the axial direction are different, and the ring light sources and the coaxial light source are combined to form differentiated illumination angles, so that more defect types can be compatible while miniaturization of the whole detection light source is ensured, and the brightness of an object to be tested can be increased to improve the detection efficiency.

Description

Detection light source and detection device Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a detection light source and a detection device. Background Art

[0002] The appearance defect detection of materials is of great significance for ensuring production safety, product quality and reducing production costs. Therefore, there is a wide demand for it.

[0003] Visual defect detection based on artificial vision inevitably suffers from issues such as visual fatigue, missed detections, and misjudgments, resulting in limited accuracy. Current methods for material visual defect detection use a single light source, which is not compatible with a wide range of defect types and also provides low illumination on the object under test, impacting detection efficiency.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a detection light source and detection device that can be compatible with more defect types and increase the brightness of light irradiated to the object to be tested to improve detection efficiency, in order to address the problem that traditional detection light sources are not compatible with more defect types and the brightness of light irradiated to the object to be tested is weak, resulting in low detection efficiency.

[0006] A detection light source, comprising:

[0007] A combined light source includes a coaxial light source and an annular light source group; the annular light source group is fixedly connected to one axial end of the coaxial light source and includes at least two first annular light sources arranged in sequence along the axial direction;

[0008] a second annular light source, located at an end of the annular light source group away from the coaxial light source in the axial direction and capable of moving relative to the combined light source along the axial direction;

[0009] The angles formed between the light emitting directions of the annular light sources and the axis are different.

[0010] In one embodiment, an end of the combined light source facing the second annular light source forms a first light-emitting end, and an end of the second annular light source facing away from the combined light source forms a second light-emitting end.

[0011] In one embodiment, the light emitted from the first light-emitting end is emitted through the second light-emitting end.

[0012] In one embodiment, the coaxial light source includes a housing, an array light source, a diffusion plate and a semi-transparent lens;

[0013] The housing has a viewing window and a light outlet that are arranged opposite to each other, and the annular light source group is arranged at one end of the housing having the light outlet;

[0014] The array light source is arranged in the shell, the semi-mirror sheet is arranged in the shell and opposite to the viewing window, and the semi-mirror sheet and the light emitted by the array light source form a 45° angle. The diffuser plate is arranged between the array light source and the semi-mirror sheet, and the light emitted by the array light source is diffused by the diffuser plate and hits the semi-mirror sheet, and the semi-mirror sheet reflects the light out of the coaxial light source.

[0015] In one embodiment, the coaxial light source, all of the first annular light sources, and the second annular light source are coaxially arranged.

[0016] In one embodiment, the second annular light source and each of the first annular light sources respectively include a plurality of light-emitting areas, and each of the light-emitting areas can be independently controlled.

[0017] In one embodiment, the second annular light source and each of the first annular light sources include the same number of light-emitting areas, and are opposite to each other in the axial direction.

[0018] In one embodiment, the second annular light source and each of the first annular light sources include four light-emitting areas respectively.

[0019] In one embodiment, the detection light source further includes a light source controller, and the light source controller is used to control each of the light-emitting areas.

[0020] In one embodiment, in the direction in which the coaxial light source points to the second annular light source, the angles corresponding to the annular light sources gradually increase.

[0021] In one embodiment, the annular light source group includes two first annular light sources arranged in sequence along the axial direction; the angle corresponding to the first annular light source close to the coaxial light source is 15°-25°, the angle corresponding to the first annular light source far from the coaxial light source is 20°-30°, and the angle corresponding to the second annular light source is 75°-85°.

[0022] In one embodiment, among the two first annular light sources, the angle corresponding to the first annular light source close to the coaxial light source is 20°, the angle corresponding to the first annular light source far from the coaxial light source is 25°, and the angle corresponding to the second annular light source is 80°.

[0023] In one embodiment, in the direction in which the coaxial light source points to the second annular light source, the outer diameter and the inner diameter of the first annular light source gradually increase, and the inner diameter of the first annular light source directly connected to the coaxial light source is larger than the maximum inner dimension of the coaxial light source in the radial direction;

[0024] The outer diameter of the second annular light source is greater than or equal to the outer diameter of the first annular light source closest to it in the axial direction, and the inner diameter of the second annular light source is greater than the inner diameter of the first annular light source closest to it in the axial direction.

[0025] In one embodiment, the annular light source group includes two first annular light sources, wherein the first annular light source close to the coaxial light source has an outer diameter of 100 mm and an inner diameter of 55 mm, and the first annular light source far from the coaxial light source has an outer diameter of 150 mm and an inner diameter of 100 mm;

[0026] The inner dimension of the coaxial light source at one end away from the annular light source group is 33 mm*33 mm, and the inner dimension of the coaxial light source at one end close to the annular light source group is 39 mm*39 mm.

[0027] In one embodiment, the detection light source further includes a mounting frame, and the combined light source is mounted in the mounting frame.

[0028] In one embodiment, the outer diameter of the mounting frame is 158 mm, the outer diameter of the second ring-shaped light source is 150 mm, and the inner diameter is 130 mm.

[0029] A detection device includes a detection module and the detection light source described above, wherein the detection light source provides illumination light for detection by the detection module.

[0030] In one embodiment, the detection module is located at an end of the combined light source away from the second annular light source in the axial direction, and the detection module, the coaxial light source, all of the first annular light sources, and the second annular light source are coaxially arranged.

[0031] In one embodiment, the detection module is a camera.

[0032] The aforementioned detection light source and detection device, because the light emission directions of each annular light source form different angles with the axial direction, each annular light source combined with the coaxial light source forms differentiated illumination angles. This not only allows for compatibility with a wider range of defect types while maintaining the overall miniaturization of the detection light source, but also increases the brightness of the object under test, thereby improving detection efficiency. Furthermore, the second annular light source can be moved axially relative to the combined light source, facilitating adjustment of the axial distance between the second annular light source and the combined light source. This, combined with the rotation of the object under test, allows for low-level illumination of the object under test, effectively revealing morphological defects such as scratches, abrasions, and gouges. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a front view of a detection device provided in one embodiment of the present application;

[0034] FIG2 is an axonometric diagram of a detection light source provided in one embodiment of the present application;

[0035] FIG3 is an axonometric view of a second annular light source of the detection light source shown in FIG2 ;

[0036] FIG4 is a cross-sectional view of a portion of the structure of the detection light source shown in FIG2 ;

[0037] FIG. 5 is a bottom view of the structure shown in FIG. 4 .

[0038] Explanation of the accompanying drawings: 1000, detection device; 100, detection light source; 10, combined light source; 11, coaxial light source; 111, shell; 1111, viewing window; 1112, light outlet; 112, semi-transparent mirror; 113, array light source; 114, diffusion plate; 12, annular light source group; 121, first annular light source; 13, first light output end; 20, second annular light source; 21, second light output end; 200, detection module; 2000, object to be tested; α, angle; Φ1, outer diameter; Φ2, inner diameter; A, light-emitting area. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0042] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0045] Referring to FIG1 , one embodiment of the present application provides a detection device 1000 for detecting appearance defects on an object under test 2000 to determine the defect type, thereby ensuring production safety, product quality, and reducing production costs. Specifically, the object under test 2000 is made of metal. Of course, in other embodiments, the material of the object under test 2000 is not limited.

[0046] The detection device 1000 includes a detection module 200 and a detection light source 100. The detection module 200 is used to detect appearance defects. The detection light source 100 can provide illumination light for the detection module 200 when detecting appearance defects to ensure the detection effect of the detection module 200. The detection module 200 can be a camera.

[0047] Referring to Figures 1 and 2, the detection light source 100 includes a combined light source 10, which includes a coaxial light source 11 and an annular light source group 12. The annular light source group 12 is fixedly connected to one axial end of the coaxial light source 11, and the annular light source group 12 includes at least two first annular light sources 121 arranged in sequence in the axial direction. The axial direction is the Z direction in Figure 1. The detection light source 100 also includes a second annular light source 20, which is located at the end of the annular light source group 12 away from the coaxial light source 11 in the axial direction. The end of the combined light source 10 facing the second annular light source 20 forms a first light output end 13, and the end of the second annular light source 20 facing away from the combined light source 10 forms a second light output end 21.

[0048] It should be noted that the coaxial light source 11 is a light source capable of generating coaxial light. Coaxial light is light that is aligned with the detection module 200 or the camera. This provides coaxial epi-illumination for the detection module 200 or the camera, thereby preventing reflections from the detection module 200. Specifically, the coaxial light source 11 comprises a housing 111, an array light source 113, a diffuser 114, and a semi-transparent lens 112. The housing 111 has a viewing window 1111 and a light outlet 1112 that are positioned opposite each other. The detection module 200 is disposed at one end of the housing 111 having the viewing window 1111, and the annular light source assembly 12 is disposed at one end of the housing 111 having the light outlet 1112. The array light source 113 is disposed within the housing 111, and the semi-transparent lens 112 is disposed within the housing 111 and opposite the viewing window 1111. The semi-transparent lens 112 forms a 45° angle with the light emitted by the array light source 113. The diffuser plate 114 is disposed between the array light source 113 and the semi-transparent lens 112. Light emitted by the array light source 113 is dispersed by the diffuser plate 114 and strikes the semi-transparent lens 112. The semi-transparent lens 112 reflects the light onto the object under test 2000, which then reflects the light back into the detection module 200. A ring light source is a light source that generates ring-shaped light that shines in a circular pattern onto the object under test 2000. The structure of the ring light source can be seen in Figure 3.

[0049] It should also be noted that the first light output end 13 is formed at the end of the combined light source 10 facing the second ring-shaped light source 20. That is, the first light output end 13 is formed on the first ring-shaped light source 121 that is closest to the second ring-shaped light source 20 in the axial direction. Thus, when the combined light source 10 illuminates the object under test 2000, light emitted by the coaxial light source 11 and the other first ring-shaped light sources 121 is emitted through the first light output end 13.

[0050] Furthermore, the second annular light source 20 is movable in the axial direction relative to the combined light source 10, and the angles α formed between the light emission directions (the irradiation directions toward the object to be measured 2000) of the respective annular light sources (including the first annular light source 121 and the second annular light source 20) and the axial direction are different from each other (see FIG. 4 ).

[0051] It should be noted that the different angles α formed between the light emission directions of the respective annular light sources and the axial direction mean that the angles α formed between the light emission directions of the respective annular light sources and the axial direction are different. For example, when the light sources are arranged in sequence along a vertical direction, that is, when the axial direction of the coaxial light source 11 is parallel to the vertical direction, the light emission directions of the respective annular light sources are tilted at different angles relative to the vertical direction.

[0052] When inspecting the appearance defects of the object under test 2000, the inspection module 200 is arranged at the end of the combined light source 10 away from the second ring light source 20 in the axial direction of the coaxial light source 11. The combined light source 10 and the second ring light source 20 emit light toward the object under test 2000 through the first light output end 13 and the second light output end 21, respectively. The light reflected by the object under test 2000 ultimately enters the inspection module 200 through the viewing window 1111 of the coaxial light source 11. The inspection module 200 can inspect the object under test 2000 under the illumination of the illumination light provided by the inspection light source 100. Because the angle α formed by the light output direction of each ring light source and the axial direction is different, the combination of each ring light source and the coaxial light source 11 forms a differentiated illumination angle. This not only ensures that more defect types are compatible while ensuring the miniaturization of the entire inspection light source 100, but also increases the brightness of the object under test 2000 to improve inspection efficiency. At the same time, the second ring light source 20 can move axially relative to the combined light source 10, so as to facilitate the adjustment of the axial distance between the second ring light source 20 and the combined light source 10, and cooperate with the rotation of the object to be tested 2000 to achieve low-azimuth irradiation of the object to be tested 2000, which has a better presentation effect on morphological defect types such as scratches, abrasions, and bumps.

[0053] In some embodiments, the detection module 200, the coaxial light source 11, all of the first annular light sources 121, and the second annular light source 20 are coaxially arranged, so that the light emitted by each light source can be relatively concentratedly illuminated toward the object under test 2000, further increasing the brightness of the object under test 2000 and improving detection efficiency. Specifically, the light emitted from the first light output end 13 is illuminated toward the object under test 2000 through the second light output end 21. In this way, the light emitted by the combined light source 10 passes through the second annular light source 20 and then illuminates the object under test 2000, thereby preventing the outer contour of the second annular light source 20 from casting a shadow on the object under test 2000 and affecting the detection effect.

[0054] In some embodiments, the angle α corresponding to each ring light source gradually increases as the coaxial light source 11 points toward the second ring light source 20. That is, the angle α formed between the light emission direction of each ring light source and the axial direction gradually increases as the coaxial light source 11 points toward the second ring light source 20. This prevents interference between the light emitted by each ring light source.

[0055] The annular light source group 12 includes two first annular light sources 121 arranged in sequence along the axial direction. Of the two first annular light sources 121, the angle α corresponding to the first annular light source 121 close to the coaxial light source 11 is 15°-25°, the angle α corresponding to the first annular light source 121 away from the coaxial light source 11 is 20°-30°, and the angle α corresponding to the second annular light source 20 is 75°-85°. Specifically, of the two first annular light sources 121, the angle α corresponding to the first annular light source 121 close to the coaxial light source 11 is 20°, the angle α corresponding to the first annular light source 121 away from the coaxial light source 11 is 25°, and the angle α corresponding to the second annular light source 20 is 80°, so that each light source cooperates to achieve a better illumination effect, thereby being compatible with more defect types. Of course, in other embodiments, there is no specific limitation on the angle α formed by the light emission direction of each annular light source and the axial direction.

[0056] In some embodiments, as the coaxial light source 11 points toward the second annular light source 20, the outer diameter Φ1 and inner diameter Φ2 of the first annular light source 121 gradually increase. The inner diameter Φ2 of the first annular light source 121 directly connected to the coaxial light source 11 is greater than the maximum radial inner dimension of the coaxial light source 11. Furthermore, the outer diameter Φ1 of the second annular light source 20 is greater than or equal to the outer diameter Φ1 of the first annular light source 121 closest to it in the axial direction, and the inner diameter Φ2 of the second annular light source 20 is greater than the inner diameter Φ2 of the first annular light source 121 closest to it in the axial direction. With this arrangement, as the coaxial light source 11 points toward the second annular light source 20, light emitted by the upstream light source passes through the downstream light source and then illuminates the object under test 2000, preventing the downstream light source from blocking light emitted by the upstream light source.

[0057] Furthermore, the annular light source group 12 includes two first annular light sources 121. Of the two first annular light sources 121, the first annular light source 121 closer to the coaxial light source 11 has an outer diameter Φ1 of 100 mm and an inner diameter Φ2 of 55 mm. The first annular light source 121 farther from the coaxial light source 11 has an outer diameter Φ1 of 150 mm and an inner diameter Φ2 of 100 mm. The inner dimensions of the coaxial light source 11 at the end farther from the annular light source group 12 are 33 mm by 33 mm, while the inner dimensions of the end closer to the annular light source group 12 are 39 mm by 39 mm. The detection light source 100 also includes a mounting frame 30, within which the combined light source 10 is mounted. The mounting frame 30 has an outer diameter of 158 mm. The second annular light source 20 has an outer diameter Φ1 of 150 mm and an inner diameter Φ2 of 130 mm. It will be appreciated that in other implementations, the dimensions of the coaxial light source 11, the first annular light source 121, and the second annular light source 20 are not specifically limited.

[0058] In some embodiments, the second annular light source 20 and each of the first annular light sources 121 each include multiple light-emitting areas A, each of which can be independently controlled. Thus, the light source controller controls the illumination of each light-emitting area A to achieve different brightness combinations, thereby improving the contrast of different defect types in the object under test 2000 and making it easier to determine the defect type.

[0059] Optionally, the second annular light source 20 includes the same number of luminous areas A as each first annular light source 121 and they are axially opposite to each other. In this way, different brightness combinations can be obtained while facilitating control of the luminous areas A of each annular light source.

[0060] In one specific embodiment, referring to FIG5 , the second annular light source 20 and each of the first annular light sources 121 each include four light-emitting areas A, and the light source controller is capable of independently controlling the four light-emitting areas A of each annular light source. It is contemplated that in other embodiments, the number of light-emitting areas A included in the second annular light source 20 and each of the first annular light sources 121 is not limited.

[0061] Another embodiment of the present application further provides a detection light source 100 included in the detection device 1000 .

[0062] The detection light source 100 and the detection device 1000 provided in the embodiments of the present application have the following beneficial effects:

[0063] 1. The angle α formed between the light emitting direction of each annular light source and the axial direction is different. Therefore, the combination of each annular light source and the coaxial light source 11 forms a differentiated illumination angle. This not only ensures that the entire detection light source 100 is miniaturized while being compatible with more defect types, but also increases the brightness of the object under test 2000 to improve detection efficiency.

[0064] 2. The second ring light source 20 can move axially relative to the combined light source 10, thereby facilitating adjustment of the axial distance between the second ring light source 20 and the combined light source 10, and cooperating with the rotation of the object to be tested 2000 to achieve low-azimuth illumination of the object to be tested 2000, and having a better presentation effect on morphological defects such as scratches, abrasions, and bumps.

[0065] 3. Each annular light source includes multiple light-emitting areas A. In this way, the light source controller controls whether each light-emitting area A is illuminated, thereby obtaining different brightness combinations to improve the contrast of different defect types in the object under test 2000, making it easier to judge the defect type.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A detection light source, characterized in that: include: A combined light source (10) comprises a coaxial light source (11) and an annular light source group (12); the annular light source group (12) is fixedly connected to one axial end of the coaxial light source (11), and comprises at least two first annular light sources (121) arranged in sequence in the axial direction; A second annular light source (20) is located at one end of the annular light source group (12) away from the coaxial light source (11) in the axial direction and is movable relative to the combined light source (10) along the axial direction; The angles (α) formed between the light emitting directions of the annular light sources and the axial direction are different.

2. The detection light source according to claim 1, characterized in that: An end of the combined light source (10) facing the second annular light source (20) forms a first light output end (13), and an end of the second annular light source (20) facing away from the combined light source (10) forms a second light output end (21).

3. The detection light source according to claim 2, characterized in that: The light emitted from the first light output end (13) is emitted through the second light output end (21).

4. The detection light source according to claim 1, characterized in that: The coaxial light source (11) comprises a housing (111), an array light source (113), a diffusion plate (114) and a semi-transparent lens (112); The housing (111) has a viewing window (1111) and a light outlet (1112) that are arranged opposite to each other, and the annular light source group (12) is arranged at one end of the housing (111) having the light outlet (1112); The array light source (113) is arranged in the shell (111), the semi-mirror sheet (112) is arranged in the shell (111) and is opposite to the viewing window (1111), and the semi-mirror sheet (112) and the light emitted by the array light source (113) form an angle of 45°, the diffusion plate (114) is arranged between the array light source (113) and the semi-mirror sheet (112), the light emitted by the array light source (113) is diffused by the diffusion plate (114) and hits the semi-mirror sheet (112), and the semi-mirror sheet (112) reflects the light out of the coaxial light source (11).

5. The detection light source according to claim 1, characterized in that: The coaxial light source (11), all of the first annular light sources (121) and the second annular light source (20) are coaxially arranged.

6. The detection light source according to any one of claims 1 to 5, characterized in that: The second annular light source (20) and each of the first annular light sources (121) respectively comprise a plurality of light emitting areas (A), and each of the light emitting areas (A) can be independently controlled.

7. The detection light source according to claim 6, characterized in that: The second annular light source (20) and each of the first annular light sources (121) include an equal number of light-emitting areas (A), which are opposite to each other in the axial direction.

8. The detection light source according to claim 7, characterized in that: The second annular light source (20) and each of the first annular light sources (121) respectively include four light-emitting areas (A).

9. The detection light source according to claim 6, characterized in that: The detection light source also includes a light source controller, and the light source controller is used to control each of the light-emitting areas (A).

10. The detection light source according to any one of claims 1 to 9, characterized in that: In the direction in which the coaxial light source (11) points to the second annular light source (20), the angles (α) corresponding to the annular light sources gradually increase.

11. The detection light source according to claim 10, characterized in that: The annular light source group (12) comprises two first annular light sources (121) arranged in sequence along the axial direction; the angle (α) corresponding to the first annular light source (121) close to the coaxial light source (11) is 15°-25°, the angle (α) corresponding to the first annular light source (121) far from the coaxial light source (11) is 20°-30°, and the angle (α) corresponding to the second annular light source (20) is 75°-85°.

12. The detection light source according to claim 11, characterized in that: Of the two first annular light sources (121), the included angle (α) corresponding to the first annular light source (121) closer to the coaxial light source (11) is 20°, the included angle (α) corresponding to the first annular light source (121) farther from the coaxial light source (11) is 25°, and the included angle (α) corresponding to the second annular light source (20) is 80°.

13. The detection light source according to claim 1, characterized in that: In the direction in which the coaxial light source (11) points toward the second annular light source (20), the outer diameter (Φ1) and the inner diameter (Φ2) of the first annular light source (121) both gradually increase, and the inner diameter (Φ2) of the first annular light source (121) directly connected to the coaxial light source (11) is larger than the maximum inner dimension of the coaxial light source (11) in the radial direction; The outer diameter (Φ1) of the second annular light source (20) is greater than or equal to the outer diameter (Φ1) of the first annular light source (121) which is closest to it in the axial direction, and the inner diameter (Φ2) of the second annular light source (20) is greater than the inner diameter (Φ2) of the first annular light source (121) which is closest to it in the axial direction.

14. The detection light source according to claim 13, characterized in that: The annular light source group (12) comprises two first annular light sources (121); of the two first annular light sources (121), the first annular light source (121) close to the coaxial light source (11) has an outer diameter (Φ1) of 100 mm and an inner diameter (Φ2) of 55 mm, and the first annular light source (121) far from the coaxial light source (11) has an outer diameter (Φ1) of 150 mm and an inner diameter (Φ2) of 100 mm; The inner dimension of the end of the coaxial light source (11) away from the annular light source group (12) is 33 mm*33 mm, and the inner dimension of the end close to the annular light source group (12) is 39 mm*39 mm.

15. The detection light source according to claim 1, characterized in that: The detection light source (100) further comprises a mounting frame (30), and the combined light source (10) is mounted in the mounting frame (30).

16. The detection light source according to claim 15, characterized in that: The outer diameter of the mounting frame (30) is 158 mm, the outer diameter (Φ1) of the second annular light source (20) is 150 mm, and the inner diameter (Φ2) is 130 mm.

17. A detection device (1000), characterized in that: It comprises a detection module (200) and a detection light source as described in any one of claims 1 to 16, wherein the detection light source provides illumination light for detection of the detection module (200).

18. The detection device (1000) according to claim 17, characterized in that: The detection module (200) is located at one end of the combined light source (10) away from the second annular light source (20) in the axial direction, and the detection module (200), the coaxial light source (11), all of the first annular light sources (121) and the second annular light source (20) are coaxially arranged.

19. The detection device (1000) according to claim 17, characterized in that: The detection module (200) is a camera.

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