A combined light source system

Abstract

This application discloses a combined light source system, including a dome surface light source and a coaxial light source. The dome surface light source has a first emitting surface, a second emitting surface, and a third emitting surface, which are connected sequentially and arranged at an angle to each other, forming an illumination space for accommodating the workpiece under test. A light-transmitting hole is provided on the second emitting surface. The coaxial light source is connected to the side of the dome surface light source away from the illumination space. The coaxial light source has a detection port and a light-emitting port, which are aligned with the light-transmitting hole so that the light emitted by the coaxial light source can be directed to the workpiece under test through the light-emitting port and the light-transmitting hole, and the imaging light returning from the workpiece under test can reach the detection port through the light-transmitting hole and the light-emitting port. This application can improve the detection accuracy of curved surfaces during detection.

Description

Technical Field

[0001] This utility model relates to the field of light source detection device technology, and in particular to a combined light source system. Background Technology

[0002] In cosmetic production lines, machine vision technology is widely used to inspect packaging and printing information. However, the curved surface of cylindrical cosmetics causes uneven imaging, and light reflection and shadows severely affect character reading and recognition. Currently used common light sources such as rings and strips do not fully consider the optical characteristics of cylindrical objects, resulting in locally overly bright or dark images during illumination, and character recognition rates are often below 70%.

[0003] Therefore, a dedicated light source system is needed to solve the problem of uneven imaging on curved surfaces in order to improve detection accuracy and reliability. Utility Model Content

[0004] This application provides a combined light source system that can improve the detection accuracy of curved surfaces during detection.

[0005] This application provides a combined light source system, including a dome surface light source and a coaxial light source. The dome surface light source has a first emitting surface, a second emitting surface, and a third emitting surface. The first emitting surface, the second emitting surface, and the third emitting surface are connected in sequence and arranged at an angle to each other, forming an illumination space for accommodating the workpiece under test. A light-transmitting hole is provided on the second emitting surface. The coaxial light source is connected to the side of the dome surface light source away from the illumination space. The coaxial light source has a detection port and a light-emitting port. The light-emitting port is aligned with the light-transmitting hole so that the light emitted by the coaxial light source can be directed to the workpiece under test through the light-emitting port and the light-transmitting hole, and the imaging light returning from the workpiece under test can reach the detection port through the light-transmitting hole and the light-emitting port.

[0006] In some embodiments, the angle between the first luminous surface and the second luminous surface, and the angle between the third luminous surface and the second luminous surface are equal, both being α, wherein the angle α is not less than 100° and not greater than 110°.

[0007] In some embodiments, the included angle α is 105°.

[0008] In some embodiments, in use, the second light-emitting surface is configured to be horizontal, and the light emitted from the coaxial light source is configured to be vertically downward.

[0009] In some embodiments, the dome surface light source includes:

[0010] The first light source assembly is used to emit illumination light; and

[0011] A diffuser plate is disposed in the direction of the illumination light emitted by the first light source assembly, and includes a first diffuser portion, a second diffuser portion, and a third diffuser portion connected in sequence and arranged at an angle. The first diffuser portion, the second diffuser portion, and the third diffuser portion respectively form the first light-emitting surface, the second light-emitting surface, and the third light-emitting surface.

[0012] The second diffuser portion is provided with a first clearance hole corresponding to the position of the light-transmitting hole.

[0013] In some embodiments, the diffuser plate is a one-piece molded component.

[0014] In some embodiments, the first light source assembly includes a first surface light source, a second surface light source, and a third surface light source. The first surface light source is arranged parallel to the first diffuser portion, the second surface light source is arranged parallel to the second diffuser portion, and the third surface light source is arranged parallel to the third diffuser portion. The second surface light source is provided with a second clearance hole at the position corresponding to the light-transmitting hole.

[0015] In some embodiments, the dome surface light source further includes a housing, the housing including a mounting base plate, the mounting base plate including a first mounting portion, a second mounting portion and a third mounting portion connected in sequence and arranged at an angle, the first surface light source being mounted on the first mounting portion, the second surface light source being mounted on the second mounting portion, and the third surface light source being mounted on the third mounting portion;

[0016] The second mounting part is provided with a third clearance hole corresponding to the position of the light-transmitting hole.

[0017] In some embodiments, the housing further includes a sleeve that passes through the third clearance hole, the second clearance hole and the first clearance hole, and connects and fixes the second mounting part, the second surface light source and the second diffuser part, and the inner hole of the sleeve constitutes the light-transmitting hole.

[0018] In some embodiments, a control device is also included, which is communicatively connected to the first surface light source, the second surface light source, the third surface light source and the coaxial light source, and the control device is configured to independently switch or adjust the brightness of each light source.

[0019] Based on the combined light source system of this application embodiment, the dome surface light source forms a semi-enclosed structure. The first and second emitting surfaces are respectively set at an angle to the second emitting surface, so that the light emitted by the three emitting surfaces can complement and coordinate with each other. The multi-angle light irradiates the cylindrical surface, effectively overcoming the problem of uneven imaging caused by curvature, allowing the characters and patterns on the curved surface to be clearly presented under the reflection of light from different directions, and greatly reducing the shadows and uneven reflection phenomena caused by single-angle illumination.

[0020] The coaxial light source is positioned above the dome-shaped light source, and the light emitted from the coaxial light source is configured to point vertically downwards, providing parallel light perpendicular to the surface being inspected. This vertical illumination significantly reduces reflections and glare, enhancing the contrast of surface details. When inspecting cylindrical cosmetics, the surface may contain various minute scratches, stains, characters, and patterns. The vertical parallel light from the coaxial light source clearly highlights these details, making them easier to identify and distinguish in the image. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application 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 the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a combined light source system provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the light path of a combined light source system provided in an embodiment of this application;

[0024] Figure 3 This is a cross-sectional schematic diagram of a combined light source system provided in an embodiment of this application from a first perspective;

[0025] Figure 4 This is a cross-sectional schematic diagram of a combined light source system provided in an embodiment of this application from a second perspective;

[0026] Figure 5 This is an exploded view of a combined light source system provided in an embodiment of this application.

[0027] Explanation of icon numbers:

[0028] 1. Combined light source system; 10. Dome surface light source; 10a. Illumination space; 10b. Light passage; 11. First luminous surface; 12. Second luminous surface; 13. Third luminous surface; 110. Housing; 111. Mounting base plate; 1111. First mounting part; 1112. Second mounting part; 1113. Third mounting part; 1114. Third clearance hole; 112. Sleeve; 113. Front frame; 114. Rear frame; 115. Left frame; 116. Right frame; 120. First light source Components; 121, First light source; 122, Second light source; 1221, Second clearance hole; 123, Third light source; 130, Diffuser plate; 131, First diffuser section; 132, Second diffuser section; 1321, First clearance hole; 133, Third diffuser section; 20, Coaxial light source; 210, Housing; 210a, Receiving cavity; 210b, Detection port; 210c, Light outlet; 220, Second light source assembly; 230, Beam splitter; 240, Light diffuser plate; 30, Connector.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained with reference to the accompanying drawings and embodiments. Detailed Implementation

[0030] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0031] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.

[0032] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please see Figure 1 This application provides a combined light source system 1, including a dome surface light source 10 and a coaxial light source 20. The following will describe each part in detail with reference to the accompanying drawings.

[0035] Please see Figure 2 and Figure 3 The dome-shaped surface light source 10 has a first emitting surface 11, a second emitting surface 12, and a third emitting surface 13. The first emitting surface 11, the second emitting surface 12, and the third emitting surface 13 are connected in sequence and arranged at an angle, together forming a downward-opening illumination space 10a for accommodating the workpiece being measured. In use, the second emitting surface 12 is approximately parallel to the horizontal plane. The first emitting surface 11 and the third emitting surface 13 are located on opposite sides of the second emitting surface 12.

[0036] Please refer to the following: Figure 3 and Figure 5 The dome surface light source 10 may include a housing 110, a first light source assembly 120, and a diffuser plate 130. The first light source assembly 120 is mounted on the housing 110, and the diffuser plate 130 is mounted on the housing 110 and located in the emission direction of the illumination light from the first light source assembly 120. The diffuser plate 130 includes a first diffuser portion 131, a second diffuser portion 132, and a third diffuser portion 133, which are connected sequentially and arranged at an angle. The first diffuser portion 131, the second diffuser portion 132, and the third diffuser portion 133 respectively constitute a first light-emitting surface 11, a second light-emitting surface 12, and a third light-emitting surface 13.

[0037] Please see Figure 5In some embodiments, the diffuser plate 130 is a one-piece molded component, which can be made of light-transmitting materials such as polymethyl methacrylate (PMMA, acrylic), polycarbonate (PC), and polystyrene (PS). Using injection molding, the diffuser plate 130 can be manufactured as a single piece, naturally connecting the first diffuser portion 131, the second diffuser portion 132, and the third diffuser portion 133 into a continuous and complete whole, thus achieving the integration of the three light-emitting surfaces. In this way, the diffuser plate 130 has no seams, and light propagation is not obstructed or abnormally reflected due to the splicing between components, allowing for more uniform transmission and diffusion. Taking PMMA as an example, its high light transmittance (up to 92% or more) and good optical uniformity allow light to be scattered in a more consistent manner when passing through the one-piece molded diffuser plate 130, avoiding local light attenuation caused by splicing, thereby eliminating dark edge phenomena and ensuring that all parts of the workpiece being measured can obtain clear images, improving the accuracy and reliability of the detection. The one-piece molding process makes the diffuser panel 130 a single, integrated structure with no weak points between its parts. Compared to spliced ​​structures, it can better withstand external forces. The one-piece molded diffuser panel 130 is less prone to cracking or deformation when subjected to impacts or vibrations, ensuring structural stability.

[0038] Please see Figure 3 and Figure 5 In some embodiments, the first light source assembly 120 includes a first surface light source 121, a second surface light source 122, and a third surface light source 123. It is understood that the surface light source includes a circuit board and multiple LED beads arrayed on the circuit board. The first surface light source 121 is arranged parallel to the first diffuser 131, the second surface light source 122 is arranged parallel to the second diffuser 132, and the third surface light source 123 is arranged parallel to the third diffuser 133. In other embodiments, the first light source assembly 120 can be a strip-shaped LED circuit board. In this example, the circuit board of the strip-shaped LED circuit board is elongated, allowing for the installation of multiple components to flexibly adjust the brightness and distribution of the light source. This application does not limit the specific form of the first light source assembly 120.

[0039] Please see Figure 5In some embodiments, the housing 110 may include a mounting base plate 111, a front frame 113, a rear frame 114, a left frame 115, and a right frame 116. The front frame 113 is mounted on the front side of the mounting base plate 111, the rear frame 114 is mounted on the rear side of the mounting base plate 111, the left frame 115 is mounted on the left side of the mounting base plate 111, the front frame 113, and the rear frame 114, and the right frame 116 is mounted on the right side of the mounting base plate 111, the front frame 113, and the rear frame 114. These plates together enclose a mounting cavity adapted to the first light source assembly 120 and the diffuser plate 130. The mounting base plate 111 includes a first mounting part 1111, a second mounting part 1112, and a third mounting part 1113 connected in sequence and arranged at an angle. A first surface light source 121 is mounted on the first mounting part 1111, a second surface light source 122 is mounted on the second mounting part 1112, and a third surface light source 123 is mounted on the third mounting part 1113. A front frame 113, a rear frame 114, a left frame 115, and a right frame 116 are correspondingly arranged at various positions on the mounting base plate 111 to form a mounting groove with an open bottom. A diffuser plate 130 is correspondingly mounted on the frame so that the diffuser is located in the light emission direction of the surface light source and covers the mounting groove to form a sealed mounting cavity.

[0040] It should be noted that, in order to facilitate a clear and accurate description of the relevant structures and positional relationships, the directions of up, down, front, back, left, and right mentioned in the above and below contents in this embodiment are defined according to the coordinate system presented in Figure 5. This directional description is only for the purpose of explaining this embodiment and does not limit the specific orientation of this embodiment in actual application.

[0041] The mounting base plate 111 can be a one-piece molded structure, such as being injection molded from plastic material, or it can be formed by bending a single piece of metal to create the required mounting section. Alternatively, the mounting base plate 111 can be designed as a split structure, consisting of three mounting plates that can be fixed together using screws, snap-fit ​​connections, welding, or other methods.

[0042] In some embodiments, the first luminous surface 11, the second luminous surface 12, and the third luminous surface 13 are of the same size. Furthermore, the first surface light source 121, the second surface light source 122, and the third surface light source 123 can also be of the same size. During manufacturing, surface light sources of uniform size can utilize the same production processes and molds, reducing the number of equipment changes and adjustments, and improving production efficiency. During installation, luminous surfaces and light sources of uniform size offer better interchangeability. Installers can more easily assemble and adjust the system without needing to consider matching issues between components of different sizes. Moreover, the coordinated use of luminous surfaces and light sources of uniform size allows the light emitted by the dome surface light source 10 to be more evenly distributed within the illumination space 10a, providing higher-quality illumination for the workpiece being measured.

[0043] Please see Figure 2 In some embodiments, the included angles between the first luminous surface 11 and the second luminous surface 12, and between the third luminous surface 13 and the second luminous surface 12, are equal and defined as α. The included angle α ranges from not less than 100° to not more than 110°. In this example, the included angle α is specifically set to 105°. This angle design causes the first luminous surface 11, the second luminous surface 12, and the third luminous surface 13 to form a semi-enclosed structure. The diffuser plate 130 has no dark edges throughout the luminescence process. When illuminating the curved surface of a cylindrical cosmetic, it can effectively reduce the shadows and reflections generated on the surface of the workpiece being tested, providing a clear and uniform illumination effect for subsequent inspection, and improving the accuracy and reliability of the inspection.

[0044] Please see Figure 4 The coaxial light source 20 includes a housing 210, a second light source assembly 220, and a beam splitter 230. The housing 210 has a cavity 210a inside, and a light outlet 210c and a detection port 210b communicating with the cavity 210a. Both the second light source assembly 220 and the beam splitter 230 are disposed within the cavity 210a. The beam splitter 230 is tilted relative to the light emission path of the second light source assembly 220, possibly at a 45° angle. Its function is to reflect the light emitted from the second light source assembly 220 towards the light outlet 210c, while allowing the imaging light returning from the light outlet 210c to be transmitted to the detection port 210b for reception by imaging devices such as cameras at the detection port 210b. The second light source assembly 220 is a planar light source, specifically an LED circuit board.

[0045] Please see Figure 4In some embodiments, the coaxial light source 20 further includes a light-diffusing plate 240, which is disposed in the optical path between the second light source assembly 220 and the beam splitter 230. The main function of the light-diffusing plate 240 is to homogenize the light emitted by the second light source assembly 220, making the light distribution more uniform and avoiding local over-brightness or under-brightness, thereby improving the image quality. The specific material and process of the light-diffusing plate 240 can be set in the same manner as the diffuser plate 130.

[0046] Please refer to section 4. In some embodiments, the coaxial light source 20 also includes a glass cover (not shown in the figure). The glass cover is connected to the housing 210 and seals the detection port 210b. This prevents dirt or impurities in the air from entering the interior of the coaxial light source 20 through the detection port 210b, thus affecting the light effect and the lifespan of electronic components. At least one optical surface of the glass cover is coated with an antireflective film, which may be made of, for example, magnesium fluoride. The antireflective film effectively reduces light reflection at the glass cover interface, improves light transmittance, and allows more imaging light to reach the imaging device at the detection port 210b, further improving the accuracy and clarity of the detection.

[0047] Please see Figures 3 to 5 The dome surface light source 10 has a light-transmitting hole 10b, which is located in the middle of the dome surface light source 10, that is, at the position of the second light-emitting surface 12. In order to form the light-transmitting hole 10b, the second mounting part 1112 of the mounting base plate 111 of the dome surface light source 10, the second surface light source 122, and the second diffuser part 132 of the diffuser plate 130 are all adapted to have openings corresponding to the position of the light-transmitting hole 10b. These openings are aligned in the vertical direction and directly combined to form the light-transmitting hole 10b to meet the requirements of light transmission.

[0048] In order to seal the mounting cavity of the housing 110 and reduce the entry of external dirt or dust into the mounting cavity, this embodiment also includes a sleeve 112. Please refer to... Figures 3 to 5 To facilitate the installation of the sleeve 112, the second diffuser 132 has a first clearance hole 1321 at the position corresponding to the light-transmitting hole 10b, the second surface light source 122 has a second clearance hole 1221 at the position corresponding to the light-transmitting hole 10b, and the second mounting part 1112 has a third clearance hole 1114 at the position corresponding to the light-transmitting hole 10b. The sleeve 112 is sequentially inserted through the third clearance hole 1114, the second clearance hole 1221, and the first clearance hole 1321, connecting and fixing the second mounting part 1112, the second surface light source 122, and the second diffuser 132 together. At this time, the inner hole of the sleeve 112 forms the light-transmitting hole 10b, ensuring both the light transmission function and the sealing effect.

[0049] A coaxial light source 20 is connected to the side of the dome-shaped light source 10 facing away from the illumination space 10a, and the detection port 210b, the light emission port 210c of the coaxial light source 20, and the light transmission hole 10b on the dome-shaped light source 10 are aligned vertically. In this way, the light emitted by the coaxial light source 20 can be directed vertically downwards through the light emission port 210c and the light transmission hole 10b to the workpiece being measured, while the imaging light returning from the workpiece can accurately reach the detection port 210b through the light transmission hole 10b and the light emission port 210c and be received by the imaging device.

[0050] For easier installation of the coaxial light source 20 and the dome surface light source 10, please refer to [link / reference needed]. Figure 5 In some embodiments, two connectors 30 are also included, located on opposite sides of the coaxial light source 20. Each connector 30 consists of a first connecting portion and a second connecting portion that are interconnected and perpendicularly arranged. The material of each connector can be metal, such as iron, copper, or various alloys. During manufacturing, a bending operation can be performed on a metal plate to form the first and second connecting portions. In actual installation, the first connecting portion is connected to the mounting base plate 111, and the second connecting portion is connected to the housing 210 of the coaxial light source 20. The connection method can be, but is not limited to, screw connection, snap-fit ​​connection, or welding connection to ensure the stability and reliability of the connection.

[0051] In some embodiments, a control device (not shown) is also included. This control device is communicatively connected to the first surface light source 121, the second surface light source 122, the third surface light source 123, and the coaxial light source 20. The control device is configured to independently switch or adjust the brightness of each light source. The control device may include a microprocessor and a drive circuit. The microprocessor can independently control the switching state, brightness level, and triggering sequence of the three surface light sources and the coaxial light source 20 according to preset programs and instructions. The drive circuit is responsible for converting the control signals output by the microprocessor into electrical signals that can directly drive the light sources, ensuring that each light source can operate stably according to the set parameters. By independently controlling the switching and brightness of each light source, the illumination conditions can be flexibly adjusted according to different detection scenarios and the characteristics of the workpiece being tested. For example, for workpieces with complex surface textures, the brightness of a certain surface light source can be specifically enhanced to highlight its texture features and improve detection accuracy; while for some light-sensitive workpieces, the brightness of the light source can be appropriately reduced to avoid damage to the workpiece. Furthermore, controlling the triggering sequence of the light sources enables high synchronization with the camera. During image acquisition, ensuring the light source is turned on at the appropriate time allows the camera to capture clear images under optimal lighting conditions, thereby greatly improving the efficiency and quality of image acquisition.

[0052] Based on the above embodiments, the combined light source system 1 of this embodiment, by combining the dome surface light source 10 and the coaxial light source 20, can overcome the defect of uneven imaging of curved objects, especially the defect of uneven imaging of the curved surface of cylindrical objects (such as cylindrical cosmetics), and can also improve the detection quality of characters and patterns.

[0053] The dome-shaped light source 10 forms a semi-enclosed structure. In use, the second light-emitting surface 12 is configured to be horizontal, and the first light-emitting surface 11 and the second light-emitting surface 12 are respectively set at an angle to the second light-emitting surface 12. In this example, the light emitted by the three light-emitting surfaces can complement and cooperate with each other. The inclined first light-emitting surface 11 and the third light-emitting surface 13 can illuminate the curved surface of the cylinder at a certain angle, while the horizontally set second light-emitting surface 12 provides uniform background light from the top. The three work together to effectively overcome the uneven imaging problem caused by the curvature of the curved surface of the cylinder, so that the characters and patterns on the curved surface are clearly presented under the reflection of light from different directions, greatly reducing the shadows and uneven reflection caused by single-angle illumination.

[0054] Furthermore, when the angles between the first luminous surface 11 and the second luminous surface 12 and the second luminous surface 12 are both 105°, it can accommodate cylindrical cosmetics of various diameters without the need for frequent adjustments to the light source position. In addition, the diffuser plate 130 of the dome surface light source 10 has no dark edges, which can effectively reduce shadows and reflections when illuminating the curved surface of cylindrical cosmetics.

[0055] The coaxial light source 20 is located above the dome-shaped light source 10. The light emitted from the coaxial light source 20 is configured to be vertically downward, providing parallel light perpendicular to the detection surface. This vertical illumination significantly reduces reflections and glare, enhancing the contrast of surface details. When detecting cylindrical cosmetics, the surface may contain various minute scratches, stains, characters, and patterns. The vertical parallel light from the coaxial light source 20 clearly highlights these details, making them easier to identify and distinguish in the image.

[0056] In summary, compared with ordinary light sources, this invention improves the uniformity of curved surface imaging by approximately 30%. When ordinary light sources illuminate a cylindrical curved surface, the single angle of the light easily leads to some areas being too bright and others too dark, resulting in uneven imaging. The light source system of this invention effectively solves this problem through the synergistic effect of multi-angle light illumination and uniform background light, making the imaging of the entire cylindrical curved surface more uniform and clear.

[0057] In character recognition, the advantages of this invention are even more pronounced. Under ordinary light sources, the false detection rate for characters is relatively high. However, by using the light source system of this invention, the character recognition rate is increased to over 95%, significantly reducing the false detection rate. This is because the light source system of this invention can provide clear and uniform images, making the edges of characters and patterns sharper and their features more obvious. The image processing system can more accurately identify and extract this information, thereby greatly improving the accuracy and reliability of character recognition.

[0058] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0059] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined light source system (1), characterized in that, include: The dome-shaped surface light source (10) has a first emitting surface (11), a second emitting surface (12), and a third emitting surface (13). The first emitting surface (11), the second emitting surface (12), and the third emitting surface (13) are connected sequentially and arranged at an angle to each other, forming an illumination space (10a) for accommodating the workpiece under test. The dome-shaped surface light source (10) has a light-transmitting hole (10b) on the second emitting surface (12). A coaxial light source (20) is connected to the side of the dome surface light source (10) away from the illumination space (10a). The coaxial light source (20) has a detection port (210b) and a light emission port (210c). The light emission port (210c) is aligned with the light transmission hole (10b) so that the light emitted by the coaxial light source (20) can be directed to the workpiece under test through the light emission port (210c) and the light transmission hole (10b), and the imaging light returning from the workpiece under test can reach the detection port (210b) through the light transmission hole (10b) and the light emission port (210c).

2. The combined light source system (1) as described in claim 1, characterized in that, The angle between the first luminous surface (11) and the second luminous surface (12), and the angle between the third luminous surface (13) and the second luminous surface (12) are equal and are defined as α, wherein the angle α is not less than 100° and not greater than 110°.

3. The combined light source system (1) as described in claim 2, characterized in that, The included angle α is 105°.

4. The combined light source system (1) as described in claim 2, characterized in that, In use, the second light-emitting surface (12) is configured to be horizontal, and the light emitted from the coaxial light source (20) is configured to be vertically downward.

5. The combined light source system (1) as described in any one of claims 1 to 4, characterized in that, The dome surface light source (10) includes: A first light source assembly (120) is used to emit illumination light; and A diffuser plate (130) is disposed in the emission direction of the illumination light of the first light source assembly (120), and includes a first diffuser part (131), a second diffuser part (132) and a third diffuser part (133) connected in sequence and arranged at an angle. The first diffuser part (131), the second diffuser part (132) and the third diffuser part (133) respectively form the first light-emitting surface (11), the second light-emitting surface (12) and the third light-emitting surface (13). The second diffuser (132) is provided with a first clearance hole (1321) corresponding to the position of the light-transmitting hole (10b), and the first light source assembly (120) is provided with a second clearance hole (1221) corresponding to the position of the light-transmitting hole (10b).

6. The combined light source system (1) as described in claim 5, characterized in that, The diffuser plate (130) is a one-piece molded component.

7. The combined light source system (1) as described in claim 5, characterized in that, The first light source assembly (120) includes a first surface light source (121), a second surface light source (122), and a third surface light source (123). The first surface light source (121) is arranged parallel to the first diffuser (131), the second surface light source (122) is arranged parallel to the second diffuser (132), and the third surface light source (123) is arranged parallel to the third diffuser (133). The second surface light source (122) is provided with a second clearance hole (1221).

8. The combined light source system (1) as described in claim 7, characterized in that, The dome surface light source (10) also includes a housing (110), the housing (110) includes a mounting base plate (111), the mounting base plate (111) includes a first mounting part (1111), a second mounting part (1112) and a third mounting part (1113) connected in sequence and arranged at an angle, the first surface light source (121) is mounted on the first mounting part (1111), the second surface light source (122) is mounted on the second mounting part (1112), and the third surface light source (123) is mounted on the third mounting part (1113). The second mounting part (1112) is provided with a third clearance hole (1114) corresponding to the position of the light-transmitting hole (10b).

9. The combined light source system (1) as described in claim 8, characterized in that, The housing (110) further includes a sleeve (112), which passes through the third clearance hole (1114), the second clearance hole (1221) and the first clearance hole (1321), and connects and fixes the second mounting part (1112), the second surface light source (122) and the second diffuser part (132). The inner hole of the sleeve (112) constitutes the light-transmitting hole (10b).

10. The combined light source system (1) as described in claim 7, characterized in that, It also includes a control device, which is communicatively connected to the first surface light source (121), the second surface light source (122), the third surface light source (123) and the coaxial light source (20), and the control device is configured to independently switch or adjust the brightness of each light source.

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