A multi-mode composite visual light source device

Abstract

The utility model discloses a multimode compound visual light source device, including cylinder lamp house and at least one coaxial light source, cylinder lamp house includes the lamp house main part and at least one luminous element, the lamp house main part forms a diffuse reflection cavity, the diffuse reflection cavity has the first opening and the second opening of opposite arrangement, the cavity wall of diffuse reflection cavity is provided with the reflection coating, the luminous element is located at the first opening or the second opening in the diffuse reflection cavity, and the emergent light of luminous element is diffused after the reflection coating, and forms the uniform dome light field, and the coaxial light source is correspondingly arranged at one side of the first opening or the second opening, and the optical axis of coaxial light source is collinear with the central axis of lamp house main part, and the application can improve the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of light source detection device technology, and in particular to a multi-mode composite visual light source device. Background Technology

[0002] In industrial automation visual inspection, different light sources are required for different features: dome lights (such as cylindrical light boxes) generate a uniform shadowless light field through diffuse reflection, which is good at detecting three-dimensional contours and eliminating reflections, but it is not good at creating contrast for two-dimensional features such as small scratches on a plane; coaxial lights provide light parallel to the optical axis of the image acquisition device, which can effectively highlight scratches and engravings on flat surfaces, but they are prone to producing shadows on complex three-dimensional structures and are difficult to illuminate for dark materials.

[0003] Many precision workpieces (such as mobile phone frames and medical devices) often have both highly reflective flat surfaces and complex curved surfaces that need to be inspected. Existing technologies often use two separate inspection stations, one for coaxial light and the other for dome light, which results in high equipment costs, large footprints, long processes, and repetitive positioning errors.

[0004] Therefore, there is an urgent need in this field for a highly integrated composite lighting solution with optimized optical path design to efficiently solve the multi-type inspection problems of complex workpieces at a single workstation. Utility Model Content

[0005] This application provides a multi-mode composite visual light source device that can improve detection efficiency.

[0006] This application provides a multi-mode composite visual light source device, including a cylindrical light box and at least one coaxial light source. The cylindrical light box includes a light box body and at least one light-emitting element. The light box body forms a diffuse reflection cavity, which has a first opening and a second opening disposed opposite to each other. The cavity wall of the diffuse reflection cavity is provided with a reflective coating. The light-emitting element is disposed in the diffuse reflection cavity and located at the first opening or the second opening. The light emitted by the light-emitting element is diffusely reflected by the reflective coating to form a uniform dome light field. The coaxial light source is correspondingly disposed on one side of the first opening or the second opening, and the optical axis of the coaxial light source is collinear with the central axis of the light box body.

[0007] In some embodiments, a connector is further included, which is used to connect the end face of the light box body to the housing of the coaxial light source; the connector has a light-transmitting hole, which is configured to allow the light-emitting port of the coaxial light source to communicate with the first opening or the second opening of the light box body when the connector is connected.

[0008] In some embodiments, the outline of the light-transmitting hole is configured to fit the end light-transmitting area of ​​the lightbox body, and the connector is a non-transparent component, the portion of which around the light-transmitting hole forms a light-blocking portion to block light emitted from the coaxial light source that is intended to enter the diffuse reflection cavity.

[0009] In some embodiments, two coaxial light sources are provided, corresponding to the first opening and the second opening that cover the main body of the light box, respectively.

[0010] In some embodiments, two light-emitting elements are provided, respectively corresponding to the first opening and the second opening, and are disposed within the diffuse reflection cavity.

[0011] In some embodiments, the light box body includes a cylindrical perimeter and two annular mounting plates. The inner wall of the cylindrical perimeter corresponding to the first opening and the inner wall of the second opening are provided with annular mounting grooves. The bottom wall of the annular mounting groove is provided with a threaded hole. The annular mounting plate is provided with a fixing hole corresponding to the threaded hole. Fasteners pass through the fixing hole and cooperate with the threaded hole to fix the annular mounting plate to the cylindrical perimeter.

[0012] The light-emitting element is mounted on the annular mounting plate.

[0013] In some embodiments, at least one observation hole is provided through the side wall of the lightbox body, and the observation hole is configured for image acquisition device to take pictures.

[0014] In some embodiments, a plurality of observation holes are provided and are distributed at intervals along the circumference of the lightbox body, and are located in the central region along the axial direction of the lightbox body.

[0015] In some embodiments, the coaxial light source includes:

[0016] The housing has an installation space and a detection port and a light output port that communicate with the installation space;

[0017] A light guide plate is disposed in the mounting space and located between the detection port and the light output port; and

[0018] A strip-shaped LED circuit board is disposed on the side of the light guide plate and is used to provide incident light to the light guide plate;

[0019] The light guide plate directs the light provided by the strip LED circuit board to the light outlet, so that it is directed toward the diffuse reflection cavity; the imaging light from the workpiece can be received by the image acquisition device through the light outlet and the detection port in sequence.

[0020] In some embodiments, the housing includes a cover plate and a bottom frame, the bottom frame forming a mounting groove with an open top, and the cover plate fitting onto the bottom frame to form the mounting space; wherein the cover plate is provided with the detection port, and the bottom frame is provided with the light emission port.

[0021] Based on the multi-mode composite vision light source device of this application embodiment, the dome light of the cylindrical light box can provide uniform and large-area illumination, suitable for detecting the overall condition of the workpiece surface; while the coaxial light of the coaxial light source has the characteristics of good directionality and concentrated light, which can highlight the fine features of the workpiece surface. By switching or combining the modes of these two light sources, one device can comprehensively meet various complex detection needs such as planar scratches, curved surface concavities and convexities, character engravings, and contour defects on the workpiece. In the actual detection process, the workpiece does not need to be moved and repositioned multiple times between different stations. All detection items can be completed sequentially by flexibly adjusting the light source mode through the control unit at a single station. This not only greatly reduces the time spent on workpiece handling and repositioning, but also effectively reduces the errors caused by multiple positioning, thus significantly improving detection efficiency. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of a multi-mode composite visual light source device provided in an embodiment of this application;

[0024] Figure 2 A schematic diagram of the structure of a multi-mode composite visual light source device provided in this application embodiment from another angle;

[0025] Figure 3 This is a schematic diagram of the light path of a multi-mode composite visual light source device provided in an embodiment of this application;

[0026] Figure 4 A schematic diagram illustrating the use of a multi-mode composite visual light source device in conjunction with an image acquisition device, as provided in an embodiment of this application;

[0027] Figure 5 A schematic diagram of the light path of another multi-mode composite visual light source device provided in the embodiments of this application;

[0028] Figure 6An exploded view of a multi-mode composite visual light source device provided in an embodiment of this application from a second perspective;

[0029] Figure 7 An exploded view of a cylindrical light box provided in an embodiment of this application;

[0030] Figure 8 This is an exploded view of a coaxial light source provided in an embodiment of this application.

[0031] Explanation of icon numbers:

[0032] 1. Multi-mode composite visual light source device; 10. Cylindrical light box; 110. Light box body; 111. Cylindrical perimeter; 1111. Diffuse reflection cavity; 1112. First opening; 1113. Second opening; 1114. Reflective coating; 1115. Observation hole; 1116. Annular mounting groove; 112. Annular mounting plate; 120. Light-emitting element; 20. Coaxial light source; 210. Housing; 211. Base frame; 212. Cover plate; 214. Detection port; 215. Light outlet; 220. Light guide plate; 230. Strip LED circuit board; 240. Light-transmitting cover plate; 30. Connector; 31. Light-transmitting hole; 32. Light-blocking part.

[0033] 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

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Please see Figure 1 and Figure 2 This application provides a multi-mode composite visual light source device 11, including a cylindrical light box 10 and a coaxial light source 20. The following will describe each part in detail with reference to the accompanying drawings.

[0039] Please see Figure 3 , Figure 4 as well as Figure 7 The cylindrical light box 10 includes a light box body 110 and at least one light-emitting element 120. The light box body 110 has a cylindrical structure and forms a cylindrical diffuse reflection cavity 1111. The diffuse reflection cavity 1111 has a first opening 1112 and a second opening 1113 disposed opposite to each other, and the cavity wall of the diffuse reflection cavity 1111 is provided with a reflective coating 1114. The light-emitting element 120 is disposed within the diffuse reflection cavity 1111 and located at the first opening 1112 or the second opening 1113. In some embodiments, two light-emitting elements 120 are provided, respectively disposed within the diffuse reflection cavity 1111 corresponding to the first opening 1112 and the second opening 1113.

[0040] When the light-emitting element 120 is turned on, it emits light. Taking the light-emitting element 120 located at the first opening 1112 as an example, a portion of the emitted light illuminates the cavity wall of the diffuse reflection cavity 1111. Since the cavity wall of the diffuse reflection cavity 1111 is provided with a reflective coating 1114, which has high diffuse reflectivity, it can diffusely reflect the incident light in all directions. This diffusely reflected light is continuously reflected and scattered within the diffuse reflection cavity 1111. After multiple reflections, the light forms a uniformly distributed illumination field within the diffuse reflection cavity 1111. Figure 3 As shown, if a light-emitting element 120 is also provided at the second opening 1113, the light emitted by the two light-emitting elements 120 complements and superimposes each other, further enhancing the uniformity of the illumination field within the diffuse reflection cavity 1111. The reflective coating 1114 can be, for example, a coating made of polytetrafluoroethylene, barium sulfate, or titanium dioxide.

[0041] Please see Figure 7In some embodiments, the light box body 110 includes a cylindrical circumference 111 and two annular mounting plates 112. The inner walls of the cylindrical circumference 111 at the first opening 1112 and the second opening 1113 are each provided with annular mounting grooves 1116. The light-emitting element 120 is a ring-shaped LED circuit board. The shape of the ring-shaped LED circuit board is adapted to the inner wall surface of the cylindrical circumference 111, providing uniform light output. During installation, the ring-shaped LED circuit board is first reliably fixed to the annular mounting plate 112 by welding, bonding, screw connection, or snap-fit ​​connection. Then, the annular mounting plate 112 with the ring-shaped LED circuit board is inserted into the corresponding annular mounting groove 1116, i.e., the outer edge is inserted into the groove, and the part with the circuit board extends into the diffuse reflection cavity 1111, thereby achieving effective positioning and fixing, ensuring the ring-shaped LED circuit board is in a suitable working position. After the diffused light emitted from the ring LED circuit board enters the diffuse reflection cavity 1111, it interacts with the inner wall reflective coating 1114 and propagates through multiple reflections, eventually forming a uniformly distributed illumination field within the cavity.

[0042] To enhance the connection stability between the annular mounting plate 112 and the cylindrical circumference 111, threaded holes are provided on the bottom wall of the annular mounting groove 1116, and corresponding fixing holes are provided on the annular mounting plate 112. During installation, bolts or screws are selected and passed through the fixing holes in sequence before being screwed into the threaded holes, so that the annular mounting plate 112 is firmly fixed on the cylindrical circumference 111, ensuring that the annular LED circuit board is stably installed on the cylindrical circumference 111. The axial direction of the fixing holes and threaded holes is parallel to the central axis of the cylindrical circumference 111, so that the fasteners can be installed from the flat end faces at both ends of the cylindrical circumference 111, improving installation efficiency.

[0043] In other embodiments, the annular mounting plate 112 and the cylindrical circumference 111 can also be installed and fixed by means of snap-fit ​​connection, adhesive bonding or other methods.

[0044] Please see Figure 4 In some embodiments, an observation hole 1115 is provided through the side wall of the cylindrical circumference 111, and the observation hole 1115 is configured for an image acquisition device to take pictures. The image acquisition device can be an industrial camera, a high-speed camera, an infrared camera, etc.

[0045] In some embodiments, multiple observation holes 1115 are provided and are distributed at intervals along the circumference of the cylindrical circumference 111, and are located in the central region along the axial direction of the cylindrical circumference 111. The multiple observation holes 1115 can provide different shooting angles for the image acquisition device from different circumferential positions, enabling the capture of surface information of the workpiece to be inspected from multiple directions.

[0046] The number of coaxial light sources 20 can be one or two. Please refer to [link / reference]. Figure 3 and Figure 4When only one coaxial light source 20 is provided, it is positioned on one side of the first opening 1112 or the second opening 1113, and the optical axis of the coaxial light source 20 is collinear with the central axis of the cylindrical circumference 111. In this case, the workpiece can be located inside the diffuse reflection cavity 1111 or on a side away from the opening of the coaxial light source 20. When the coaxial light source 20 is turned on, the emitted light is emitted in the form of parallel light along a direction collinear with the central axis of the cylindrical circumference 111, illuminating the workpiece inside the diffuse reflection cavity 1111, or passing through the diffuse reflection cavity 1111 and the corresponding opening to illuminate the surface of the workpiece located outside the diffuse reflection cavity 1111.

[0047] When setting two coaxial light sources 20, please refer to Figure 5 Two coaxial light sources 20 are located on one side of the first opening 1112 and the second opening 1113, respectively, and their respective optical axes are collinear with the central axis of the cylindrical circumference 111. At this time, the workpiece can be placed in the diffuse reflection cavity 1111 through the aforementioned observation hole 1115. In practical applications, on the one hand, the two coaxial light sources 20 can be controlled to light up simultaneously. When they work simultaneously, the parallel light rays emitted from two directions cooperate to illuminate the workpiece surface. Because the light rays enter from different angles simultaneously, the workpiece surface can be covered more comprehensively, reducing the illumination dead angles caused by the complex shape of the workpiece surface, thereby obtaining the most uniform illumination effect. On the other hand, the two coaxial light sources 20 can also be controlled to light up alternately at different times. When the first coaxial light source 20 is lit, its emitted parallel light rays illuminate the workpiece surface at a specific angle, and the image acquisition device acquires an image of the workpiece at that illumination angle. Subsequently, the first coaxial light source 20 is turned off, and the second coaxial light source 20 is lit, illuminating the workpiece at another angle, and the image acquisition device again acquires an image of the workpiece at that illumination angle. By using this time-division alternating lighting method, the image acquisition device can acquire image sequences of the same workpiece under two lighting angles, one on the left and one on the right.

[0048] Please refer to the following: Figure 1 and Figure 8In some embodiments, the coaxial light source 20 generally exhibits a flat structure and includes a housing 210, a light guide plate 220, and a strip LED circuit board 230. The housing 210 forms an installation space and a detection port 214 and a light emission port 215 connecting the installation space; the light guide plate 220 is disposed in the installation space and located between the detection port 214 and the light emission port 215; the strip LED circuit board 230 is disposed to the side of the light guide plate 220 to provide incident light to the light guide plate 220. In actual operation, the light emitted by the strip LED circuit board is directed to the light guide plate 220. The light guide plate 220 utilizes its internal optical structure and material properties to guide the light to the light emission port 215 and direct it uniformly towards the diffuse reflection cavity 1111, thereby illuminating the workpiece. The imaging light from the workpiece passes sequentially through the light emission port 215 and the detection port 214 and is finally received by the image acquisition device.

[0049] Based on the above embodiments, the image acquisition device can selectively acquire images of the workpiece through the detection port 214 of the coaxial light source 20 or the observation hole 1115 on the cylindrical light box 10, according to actual needs.

[0050] Please see Figure 8 In some embodiments, four strip LED circuit boards are provided and located on the sides of the four sides of the light guide plate 220, so that incident light can be provided to the light guide plate 220 from multiple directions, ensuring that the light guide plate 220 can receive sufficient and uniform light input.

[0051] Please see Figure 8 In some embodiments, the housing 210 includes a cover plate 212 and a bottom frame 211. The bottom frame 211 forms a mounting groove with an open top. The cover plate 212 can be attached to the bottom frame 211 by means of snap-fit ​​connection, screw fixation, etc., to form an installation space. The cover plate 212 is provided with a detection port 214, and the bottom frame 211 is provided with a light emission port 215. This facilitates the processing and installation of the housing 210, and also facilitates the installation of internal components of the coaxial light source 20.

[0052] Please see Figure 8 In some embodiments, the coaxial light source 20 further includes two light-transmitting cover plates 240, which respectively cover the detection port 214 and the light-emitting port 215. The light-transmitting cover plates 240 are made of materials with high light transmittance, such as optical glass or plexiglass, to ensure that light can pass through efficiently. Meanwhile, to improve light transmittance and reduce light reflection loss on the surface of the light-transmitting cover plates 240, an anti-reflection film is provided on at least one optical surface of the light-transmitting cover plates 240. The anti-reflection film is one or more thin films formed on the surface of the light-transmitting cover plates 240 through processes such as vacuum deposition. It can cause interference of light of a specific wavelength on the surface of the thin film, thereby reducing reflectivity and increasing transmittance.

[0053] Please see Figure 3 and Figure 6 To facilitate the connection between the cylindrical light box 10 and the coaxial light source 20, this embodiment further includes a connector 30. The connector 30 connects the end face of the light box body 110 to the housing 210 of the coaxial light source 20. The connector 30 has a first mounting hole corresponding to the end face of the light box body 110, and a second mounting hole corresponding to the first mounting hole on the end face of the light box body 110 (i.e., the bottom plate). Screws are passed through the first and second mounting holes to fix the connector 30 relative to the light box body 110. The connector 30 has a third mounting hole corresponding to the bottom frame 211 of the cylindrical light source, and a fourth mounting hole on the bottom frame 211. Screws are passed through the third and fourth mounting holes to fix the connector 30 relative to the coaxial light source 20. Thus, the cylindrical light box 10 and the coaxial light source 20 can be fixed together using the connector 30.

[0054] A light-transmitting hole 31 is provided on the connector 30. The light-transmitting hole 31 is configured such that when the connector 30 is connected, the light-emitting port 215 of the coaxial light source 20 is connected to the first opening 1112 or the second opening 1113 of the cylindrical circumference 111. In this way, the emitted light from the coaxial light source 20 can pass through the light-emitting port 215, the light-transmitting hole 31, the first opening 1112 or the second opening 1113 in sequence and irradiate into the diffuse reflection cavity 1111.

[0055] Please see Figure 6 The first opening 1112 and the second opening 1113 are both circular. The light outlet 215 of the coaxial light source 20 can be rectangular. In this embodiment, the outline of the light-transmitting hole 31 is configured to match the end light-transmitting area of ​​the light box body 110, that is, the inner hole of the annular mounting plate 112. The connector 30 is a non-transparent part, and the part of it located around the light-transmitting hole 31 forms a light-blocking part 32 to block the light emitted from the coaxial light source 20 that is expected to enter the diffuse reflection cavity 1111. The rectangular light outlet 215 of the coaxial light source 20 does not match the circular opening of the cylindrical light box 10 in shape and area. If simply connected, the light from the four corners of the rectangular light outlet 215 will directly illuminate the connector 30 itself or the end face of the cylindrical light box 10, forming ineffective lighting and producing strong stray light. These stray lights can enter the lens through diffuse reflection, reducing image contrast. By making the connector 30 an opaque component, the impact of stray light on the image acquisition device can be reduced. The connector 30 can be made of an opaque material, such as iron or wood, or the surface of the connector 30 can be coated with an opaque material, such as ink or paint.

[0056] In some embodiments, this application further includes a control unit: the control unit is electrically connected to the light-emitting element 120 and the coaxial light source 20, and is used to independently control the switching, brightness, and operating mode of each light source. By independently controlling the switching and brightness of each light source, the lighting conditions can be flexibly adjusted according to different detection scenarios and the characteristics of the workpiece being tested.

[0057] Based on the above embodiments, the dome light of the cylindrical light box 10 can provide uniform and large-area illumination, suitable for inspecting the overall condition of the workpiece surface; while the coaxial light of the coaxial light source 20 has the characteristics of good directionality and concentrated light, which can highlight the fine features of the workpiece surface. By switching or combining the modes of these two light sources, one device can comprehensively meet various complex inspection needs such as planar scratches, curved surface concavities, character engravings, and contour defects on the workpiece. In the actual inspection process, the workpiece does not need to be moved and repositioned multiple times between different workstations. All inspection items can be completed sequentially by flexibly adjusting the light source mode through the control unit at a single workstation. This not only greatly reduces the time spent on workpiece handling and repositioning, but also effectively reduces the errors caused by multiple positioning, resulting in a significant improvement in inspection efficiency. Actual tests show that the inspection efficiency can be improved by more than 40%. The control unit is programmable and can customize a special lighting "recipe" (such as brightness ratio and trigger timing) for different workpieces, realizing flexible inspection. This application can effectively solve the one-stop inspection problem of workpieces with mixed surface characteristics, and is especially suitable for scenarios with extremely high product quality requirements in industries such as 3C electronics, automobile manufacturing, and precision machining.

[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 multi-mode composite visual light source device (1), characterized in that, include: A cylindrical light box (10) includes a light box body (110) and at least one light-emitting element (120). The light box body (110) forms a diffuse reflection cavity (1111). The diffuse reflection cavity (1111) has a first opening (1112) and a second opening (1113) arranged opposite to each other. The cavity wall of the diffuse reflection cavity (1111) is provided with a reflective coating (1114). The light-emitting element (120) is disposed in the diffuse reflection cavity (1111) and located at the first opening (1112) or the second opening (1113). The light emitted by the light-emitting element (120) is diffusely reflected by the reflective coating (1114) to form a uniform dome light field. as well as At least one coaxial light source (20) is disposed on one side of the first opening (1112) or the second opening (1113), and the optical axis of the coaxial light source (20) is collinear with the central axis of the light box body (110).

2. The multi-mode composite visual light source device (1) as described in claim 1, characterized in that, It also includes a connector (30) for connecting the end face of the light box body (110) to the housing (210) of the coaxial light source (20); the connector (30) has a light-transmitting hole (31) and is configured to allow the light-emitting port (215) of the coaxial light source (20) to communicate with the first opening (1112) or the second opening (1113) of the light box body (110) when the connector (30) is connected.

3. The multi-mode composite visual light source device (1) as described in claim 2, characterized in that, The outline of the light-transmitting hole (31) is configured to fit the end light-transmitting area of ​​the light box body (110). The connector (30) is a non-transparent component, and the portion of it located around the light-transmitting hole (31) forms a light-blocking part (32) to block light emitted from the coaxial light source (20) that is expected to enter the diffuse reflection cavity (1111).

4. The multi-mode composite visual light source device (1) as described in claim 1, characterized in that, Two coaxial light sources (20) are provided, corresponding to the first opening (1112) and the second opening (1113) of the light box body (110) respectively.

5. The multi-mode composite visual light source device (1) as described in claim 1, characterized in that, Two light-emitting elements (120) are provided, which are respectively disposed in the diffuse reflection cavity (1111) corresponding to the first opening (1112) and the second opening (1113).

6. The multi-mode composite visual light source device (1) as described in claim 5, characterized in that, The main body (110) of the light box includes a cylindrical circumference (111) and two annular mounting plates (112). The inner wall of the cylindrical circumference (111) corresponding to the first opening (1112) and the inner wall of the second opening (1113) are provided with annular mounting grooves (1116). The bottom wall of the annular mounting groove (1116) is provided with threaded holes. The annular mounting plate (112) is provided with fixing holes corresponding to the threaded holes. Fasteners pass through the fixing holes and cooperate with the threaded holes to fix the annular mounting plate (112) to the cylindrical circumference (111). The light-emitting element (120) is mounted on the annular mounting plate (112).

7. The multi-mode composite visual light source device (1) as described in claim 1, characterized in that, At least one observation hole (1115) is provided through the side wall of the light box body (110), and the observation hole (1115) is configured for the image acquisition device to take pictures.

8. The multi-mode composite visual light source device (1) as described in claim 7, characterized in that, Multiple observation holes (1115) are provided and are distributed at intervals along the circumference of the light box body (110), and are located in the central region along the axial direction of the light box body (110).

9. The multi-mode composite visual light source device (1) as described in any one of claims 1 to 8, characterized in that, The coaxial light source (20) includes: The housing (210) has an installation space and a detection port (214) and a light output port (215) communicating with the installation space. A light guide plate (220) is disposed in the mounting space and located between the detection port (214) and the light output port (215); and A strip-shaped LED circuit board (230) is disposed on the side of the light guide plate (220) for providing incident light to the light guide plate (220); The light guide plate (220) directs the light provided by the strip LED circuit board (230) to the light outlet (215) so that it is directed toward the diffuse reflection cavity (1111); the imaging light from the workpiece can be received by the image acquisition device through the light outlet (215) and the detection port (214) in sequence.

10. The multi-mode composite visual light source device (1) as described in claim 9, characterized in that, The housing (210) includes a cover plate (212) and a bottom frame (211). The bottom frame (211) forms a mounting groove with an open top. The cover plate (212) covers the bottom frame (211) to form the mounting space. The cover plate (212) is provided with the detection port (214), and the bottom frame (211) is provided with the light emission port (215).

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