Height-adjustable multi-angle light source and PCB board detection device

Abstract

The utility model relates to surface defect detection technical field discloses a height -adjustable multi -angle light source and PCB detection device. The height -adjustable multi -angle light source includes window board, the top central mounting of window board has coaxial light source subassembly, and the light path of coaxial light source subassembly is throughly set up on window board on the light window of supplementing, and the height -adjustable multiple sets of lamp board are arranged at the bottom one side of window board at intervals, and the angle between multiple sets of lamp board and predetermined detection plane gradually increases along the light path light direction of coaxial light source subassembly, and the emergent light of coaxial light source subassembly and each group lamp board can cover the detection surface of work piece, and the periphery of coaxial light source subassembly is also evenly provided with multiple shooting windows for observing or shooting work piece at multiple angles on window board. The height -adjustable multi -angle light source of the utility model can be flexibly adapted to different types of PCB, and the accuracy and precision of surface detection are improved.

Description

Technical Field

[0001] This utility model relates to the field of surface defect detection technology, and in particular to an adjustable height multi-angle light source and PCB board detection device. Background Technology

[0002] The most widely used methods for surface defect detection include manual visual inspection and automated optical inspection. Manual visual inspection is rarely used on production lines due to its low efficiency and accuracy. Currently, automated optical inspection is generally used on production lines. Automated optical inspection involves using a camera with a light source to capture images of the workpiece surface, and then using relevant defect recognition algorithms to process the images to determine the location and type of defects. Its detection efficiency and accuracy are far superior to those of manual visual inspection.

[0003] PCB boards are a relatively special type of workpiece. PCB board defect detection mainly includes: detecting appearance defects in resistors and capacitors, and inspecting the solder of electronic components. In current technology, PCB board defect detection mostly uses a single light source. The camera captures the image through the narrow optical path of the light source. Only light from a single angle can illuminate the PCB surface, which leads to shadows or other lighting defects when acquiring images of complex PCB surfaces, thus affecting the accuracy and precision of surface inspection. Furthermore, PCB board inspection also requires the determination of functional tests such as circuit continuity / disconnection based on the 3D information of the PCB surface. However, existing automatic optical inspection methods cannot acquire the 3D information of the object's surface, so a manual re-inspection process is still required, making it impossible to achieve truly fully automated optical inspection.

[0004] In summary, there is an urgent need in this field for a light source that can be applied to PCB board inspection, flexibly adapting to different types of PCB boards, and achieving truly fully automated optical inspection.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable height multi-angle light source and PCB board inspection device to solve or at least partially solve the technical problems existing in the prior art.

[0007] To achieve this objective, the present invention adopts the following technical solution: In the first aspect, this utility model provides an adjustable height multi-angle light source, including a window plate, a coaxial light source assembly installed at the top center of the window plate, and a supplementary light window is provided on the window plate through the optical path of the coaxial light source assembly; Multiple sets of height-adjustable light panels are spaced apart on one side of the bottom of the window panel; the angle between the multiple sets of light panels and the predetermined detection plane increases sequentially along the light output direction of the coaxial light source assembly; the emitted light from the coaxial light source assembly and each set of light panels can cover the detection surface of the workpiece. The window plate is also uniformly provided with multiple shooting windows around the coaxial light source assembly for observing or photographing the workpiece from multiple angles.

[0008] Optionally, a first light panel is fixedly installed at the bottom of the window panel; The bottom of the window panel is also fixedly installed with a first fixing body, and a set of second light panels is fixedly installed at the bottom of the first fixing body. The second light panels are located on one side of the bottom of the first light panel. A second fixing body is provided on one side of the bottom of the first fixing body, and a set of third lamp panels is fixedly installed on the bottom of the second fixing body.

[0009] Optionally, a plurality of bearing grooves are evenly provided on the outer side wall of the second fixing body, and the bearing grooves extend upward through to the top of the second fixing body; The bearing groove is fixedly installed with a height adjustment plate. The upper end of the height adjustment plate is provided with a strip-shaped adjustment groove. An adjustment component is inserted through the adjustment groove and can slide longitudinally in the adjustment groove. The first fixed body is provided with a locking hole that can be fixedly connected with the adjustment component. When the adjusting member is fixedly connected to the locking hole, the end of the adjusting member away from the locking hole abuts against the side edge of the adjusting groove away from the first fixing body.

[0010] Optionally, the first fixing body includes a first housing in the shape of an annular ring. The outer side wall of the first housing extends downward to form a first extension portion. The first extension portion and the first housing together form a first fixing groove. A plurality of first mounting inclined surfaces are evenly arrayed in the first fixing groove in the circumferential direction of the first housing. The second lamp plate is fixedly installed on each of the first mounting inclined surfaces. The second fixing body includes a second housing in the shape of an annular ring. The outer side wall of the second housing extends downward to form a second extension. The second extension and the second housing together form a second fixing groove. A plurality of second mounting inclined surfaces are evenly arranged in the second fixing groove in the circumferential direction of the second housing. The third lamp plate is fixedly installed on each of the second mounting inclined surfaces.

[0011] Optionally, the workpiece is placed on a predetermined inspection plane; The first lamp panel is parallel to the detection plane; the angle between the first mounting inclined surface and the detection plane is 30°; the angle between the second mounting inclined surface and the detection plane is 70°.

[0012] Optionally, a diffuser plate is also provided in the optical path of each of the first lamp board, the second lamp board, and the third lamp board.

[0013] Optionally, the first light panel has an avoidance through hole at the position corresponding to the supplementary lighting window, and an avoidance window is provided at the position corresponding to each of the shooting windows.

[0014] Optionally, the coaxial light source assembly includes a housing, and the housing contains a supplementary light unit and a beam splitter; The supplementary lighting unit is perpendicular to the detection plane, and the angle between the beam splitter and the detection plane is 45°. The light emitted by the supplementary lighting unit is reflected by the beam splitter and then passes through the supplementary lighting window, the avoidance through hole, the central through hole of the first fixing body and the central through hole of the second fixing body in sequence, and is directed perpendicularly toward the detection plane.

[0015] Optionally, a shooting window is provided around each of the four sides of the fill light window; A curved chamfer is provided between the side wall of the shooting window and the top edge of the shooting window.

[0016] Secondly, this utility model provides a PCB board inspection device, including multiple imaging components for capturing surface images of the PCB board and an adjustable height multi-angle light source as described above. An image capture port is also provided on the top of the housing of the coaxial light source assembly, directly opposite the fill light window; Above the image capture port and each of the shooting windows, a shooting component is respectively provided for shooting surface images of the PCB board from different angles.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention proposes an adjustable height multi-angle light source, which achieves comprehensive coverage of the workpiece inspection surface by setting the light source at different heights and corresponding illumination angles. This eliminates shadows and most lighting defects, improving the accuracy and precision of surface inspection. Furthermore, the height of the light panel can be adjusted as needed, enhancing the flexibility of inspection and meeting different inspection requirements. In addition, multiple imaging windows are set at different positions on the window panel to allow for observation or imaging of the workpiece from different angles, acquiring 3D information of the object's surface and achieving truly fully automated optical inspection.

[0018] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a PCB board testing device provided in an embodiment of this utility model.

[0021] Figure 2 This is a top view of a PCB board testing device provided in an embodiment of this utility model.

[0022] Figure 3 for Figure 2 HH cross-sectional view.

[0023] Figure 4 This is an exploded structural diagram of a PCB board inspection device provided in an embodiment of this utility model.

[0024] Figure 5 This is a structural diagram of the height adjustment plate provided in an embodiment of the present invention.

[0025] Figure 6 This is a structural diagram of the window panel provided in an embodiment of the present utility model.

[0026] Figure 7 This is a structural diagram of the first lamp panel provided in an embodiment of the present utility model.

[0027] Figure 8 This is a structural diagram of the first fixed body provided in an embodiment of the present utility model.

[0028] Figure 9 This is a structural diagram of the second fixing body provided in an embodiment of the present utility model.

[0029] In the picture: 11. First shooting component; 12. Second shooting component; 20. Coaxial light source assembly; 21. Fill light unit; 22. Beam splitter; 30. Window panel; 31. Connector; 32. Center ring; 301. Shooting window; 302. Fill light window; 40. First fixed body; 401. First mounting slope; 50. Second fixed body; 501. Second mounting slope; 502. Bearing groove; 60. Height adjustment plate; 601. Adjustment slot; 602. Fixing hole; 71. First light panel; 711. Clearance window; 712. Clearance through hole; 72. Second light panel; 73. Third light panel; 80. Diffuser plate; 100. Workpiece. Detailed Implementation

[0030] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0031] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0032] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0033] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0034] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0035] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0036] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0037] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0039] Example 1: Please see Figures 1-9 ,picture Figure 1 This is a three-dimensional structural diagram of a PCB board inspection device provided in an embodiment of this utility model. Figure 2This is a top view of a PCB board inspection device provided in an embodiment of this utility model. Figure 3 for Figure 2 HH-direction cross-sectional view, Figure 4 This is an exploded structural diagram of a PCB board inspection device provided in an embodiment of this utility model. Figure 5 This is a structural diagram of the height adjustment plate provided in an embodiment of the present invention. Figure 6 This is a structural diagram of the window panel provided in an embodiment of the present invention. Figure 7 This is a structural diagram of the first lamp panel provided in this embodiment of the utility model. Figure 8 This is a structural diagram of the first fixing body provided in an embodiment of the present utility model. Figure 9 This is a structural diagram of the second fixing body provided in an embodiment of the present utility model.

[0040] like Figure 1 As shown, this embodiment provides an adjustable height multi-angle light source, including a window plate 30, and a coaxial light source assembly 20 is installed at the top center of the window plate 30; For specific details, please refer to... Figure 2 and Figure 3 The coaxial light source assembly 20 includes a housing, within which a supplementary light unit 21 and a beam splitter 22 are housed. It should be noted that the supplementary light unit 21 uses coaxial light, which is generally composed of an LED light panel and a diffuser plate. The light emitted from the LED light panel passes through the diffuser plate and then strikes the beam splitter 22. The beam splitter 22 is a semi-transparent, semi-reflective optical element that reflects the light incident on it and directs it perpendicularly onto a predetermined detection plane. The specific optical path is as follows: Figure 3 As shown, the angle between the beam splitter 22 and the detection plane is 45°; the light emitted by the supplementary light unit 21 is reflected by the beam splitter 22 and passes through the supplementary light window 302 on the window plate 30, the clearance through hole 712 of the first lamp plate 71, the central through hole of the first fixed body 40 and the central through hole of the second fixed body 50 in sequence, and is directed perpendicularly to the detection plane.

[0041] Specifically, such as Figure 6 As shown, the supplementary lighting window 302 is a through hole opened on the window plate 30 in the optical path of the coaxial light source assembly 20; as Figure 7 As shown, the clearance through hole 712 is a through hole that is importantly opened in the first lamp plate 71; as Figure 8 and Figure 9 As shown, the central through hole of the first fixing body 40 and the central through hole of the second fixing body 50 are respectively the central through holes of the first fixing body 40 and the second fixing body 50.

[0042] Furthermore, such as Figure 4As shown, multiple sets of height-adjustable light panels are spaced apart on one side of the bottom of the window plate 30; the angle between the multiple sets of light panels and the predetermined detection plane increases sequentially along the optical path direction of the coaxial light source assembly 20; the emitted light from the coaxial light source assembly 20 and each set of light panels can cover the detection surface of the workpiece 100. Please combine Figure 4 and Figure 6 The window plate 30 is also evenly provided with multiple shooting windows 301 around the coaxial light source assembly 20 for observing or photographing the workpiece 100 from multiple angles.

[0043] Specifically, a first light panel 71 is fixedly installed at the bottom of the window panel 30; A first fixing body 40 is also fixedly installed at the bottom of the window panel 30. A set of second light panels 72 is fixedly installed at the bottom of the first fixing body 40. The second light panels 72 are located on one side of the bottom of the first light panel 71. A second fixing body 50 is provided on one side of the bottom of the first fixing body 40, and a set of third lamp panels 73 are fixedly installed on the bottom of the second fixing body 50.

[0044] Specifically, a plurality of bearing grooves 502 are evenly provided on the outer side wall of the second fixing body 50, and the bearing grooves 502 extend upward through to the top of the second fixing body 50. A height adjustment plate 60 is fixedly installed on the bearing groove 502. The upper end of the height adjustment plate 60 is provided with a strip-shaped adjustment groove 601. An adjustment component is inserted through the adjustment groove 601 and can slide longitudinally in the adjustment groove 601. A locking hole is provided on the first fixed body 40 that can be fixedly connected with the adjustment component. When the adjusting member is fixedly connected to the locking hole, the end of the adjusting member away from the locking hole abuts against the side edge of the adjusting groove 601 away from the first fixed body 40.

[0045] In this embodiment, the distance between the first lamp panel 71 and the second lamp panel 72 is relatively fixed, and the height of the first fixed body 40 can be adjusted accordingly by adjusting the position of the adjusting member on the height adjusting plate 60.

[0046] Specifically, the first fixing body 40 includes a first housing in the shape of an annular shape. The outer side wall of the first housing extends downward to form a first extension. The first extension and the first housing together form a first fixing groove. A plurality of first mounting inclined surfaces 401 are evenly arranged in the first fixing groove in the circumferential direction of the first housing. A second lamp plate 72 is fixedly installed on each of the first mounting inclined surfaces 401. The second fixing body 50 includes a second housing in the shape of an annular ring. The outer side wall of the second housing extends downward to form a second extension. The second extension and the second housing together form a second fixing groove. A plurality of second mounting inclined surfaces 501 are evenly arranged in the second fixing groove in the circumferential direction of the second housing. A third lamp plate 73 is fixedly installed on each of the second mounting inclined surfaces 501.

[0047] Specifically, workpiece 100 is placed on the predetermined inspection plane; The first lamp plate 71 is parallel to the detection plane; the angle between the first mounting slope 401 and the detection plane is 30°; the angle between the second mounting slope 501 and the detection plane is 70°.

[0048] Specifically, each of the first lamp board 71, the second lamp board 72, and the third lamp board 73 has a diffuser plate 80 installed in its optical path.

[0049] The predetermined detection plane refers to the predetermined detection position where the workpiece 100 is to be placed. In this embodiment, the predetermined detection plane can also be simply understood as the top surface of the workpiece 100.

[0050] Specifically, an avoidance through hole 712 is provided on the first light panel 71 at the position corresponding to the supplementary light window 302, and an avoidance window 711 is provided at the position corresponding to each shooting window 301.

[0051] Specifically, a shooting window 301 is set around each of the four sides of the fill light window 302; A curved chamfer 3011 is provided between the side wall of the shooting window 301 and the top edge of the shooting window 301. The curved chamfer 3011 can be used to increase the field of view of the lens.

[0052] Furthermore, it should be noted that the first lamp plate 71, the second lamp plate 72, and the third lamp plate 73 are all equipped with diffuser plates. It is understood that, in order to highlight other optical structures of this application, not all diffuser plates are shown in the accompanying drawings. For example, as... Figure 4 The diffuser plate 80 is located directly below the ring of LEDs around the clearance through hole 712 of the first lamp plate 71. The middle ring 32 is used to fix the diffuser plate 80. The light emitted by the ring of LEDs is then directed onto the surface of the workpiece 100 through the diffuser plate 80.

[0053] In summary, the adjustable height multi-angle light source proposed in this embodiment achieves full coverage of the inspection surface of the workpiece 100 by setting the light source with corresponding illumination angles at different heights. This eliminates shadows and most lighting defects, improving the accuracy and precision of surface inspection. Furthermore, the heights of the first lamp plate 71 and the second lamp plate 72 can be flexibly adjusted by the height adjustment plate 60, enhancing the flexibility of inspection and meeting different inspection needs. In addition, multiple imaging windows 301 are set at different positions on the window plate 30 to allow observation or imaging of the workpiece from different angles, acquiring 3D information of the object surface and achieving truly fully automated optical inspection.

[0054] Example 2: This embodiment proposes a PCB board inspection device, including multiple imaging components for capturing surface images of the PCB board and an adjustable height multi-angle light source as described in Embodiment 1. An image capture port is also provided on the top of the housing of the coaxial light source assembly 20, directly opposite the supplementary light window 302; A camera component is installed above the image capture port and each shooting window 301 to capture surface images of the PCB board from different angles.

[0055] For example, such as Figure 4 As shown, the above-mentioned multiple shooting components include a first shooting component 11 and four second shooting components 12, wherein the first shooting component 11 is set facing the image capture port, and the second shooting components 12 are set facing the shooting window 301.

[0056] Since the structure of the adjustable height multi-angle light source has been described in detail in Embodiment 1, it will not be repeated in this embodiment.

[0057] In summary, the PCB board inspection device proposed in this embodiment achieves full coverage of the inspection surface of the workpiece 100 by setting light sources with corresponding illumination angles at different heights. This eliminates shadows and most lighting defects, improving the accuracy and precision of PCB board surface inspection. Furthermore, the heights of the first lamp board 71 and the second lamp board 72 can be flexibly adjusted by the height adjustment plate 60, enhancing the flexibility of PCB board inspection and meeting the inspection needs of different types of PCB boards. In addition, multiple imaging windows 301 are set at different positions on the window plate 30 to observe or capture images of the workpiece from different angles, acquiring 3D information of the PCB board surface, thereby realizing multiple functional automatic inspections and achieving truly fully automatic optical inspection.

[0058] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A height-adjustable multi-angle light source, characterized in that, Includes a window panel (30), on which a coaxial light source assembly (20) is installed at the top center, and a supplementary light window (302) is provided on the window panel (30) through the optical path of the coaxial light source assembly (20). Multiple sets of height-adjustable lamp plates are spaced apart on one side of the bottom of the window plate (30); the angle between the multiple sets of lamp plates and the predetermined detection plane increases sequentially along the light output direction of the coaxial light source assembly (20); the emitted light from the coaxial light source assembly (20) and each set of lamp plates can cover the detection surface of the workpiece (100). The window plate (30) is also uniformly provided with multiple shooting windows (301) around the coaxial light source assembly (20) for observing or photographing the workpiece (100) from multiple angles.

2. The adjustable height multi-angle light source according to claim 1, characterized in that, The bottom of the window panel (30) is fixedly installed with a first light panel (71); The bottom of the window panel (30) is also fixedly installed with a first fixing body (40), and a set of second lamp panels (72) is fixedly installed at the bottom of the first fixing body (40). The second lamp panels (72) are located on one side of the bottom of the first lamp panel (71). A second fixing body (50) is provided on one side of the bottom of the first fixing body (40), and a set of third lamp panels (73) are fixedly installed on the bottom of the second fixing body (50).

3. The adjustable height multi-angle light source according to claim 2, characterized in that, A plurality of bearing grooves (502) are evenly provided on the outer side wall of the second fixing body (50), and the bearing grooves (502) extend upward through to the top of the second fixing body (50); The bearing groove (502) is fixedly installed with a height adjustment plate (60). The upper end of the height adjustment plate (60) is provided with a strip-shaped adjustment groove (601). An adjustment member is inserted through the adjustment groove (601) and can slide longitudinally in the adjustment groove (601). The first fixed body (40) is provided with a locking hole that can be fixedly connected with the adjustment member. When the adjusting member is fixedly connected to the locking hole, the end of the adjusting member away from the locking hole abuts against the side edge of the adjusting groove (601) away from the first fixing body (40).

4. The adjustable height multi-angle light source according to claim 3, characterized in that, The first fixing body (40) includes a first housing in the shape of an annular shape. The outer side wall of the first housing extends downward to form a first extension. The first extension and the first housing together form a first fixing groove. A plurality of first mounting inclined surfaces (401) are evenly arranged in the first fixing groove in the circumferential direction of the first housing. The second lamp plate (72) is fixedly installed on each of the first mounting inclined surfaces (401). The second fixing body (50) includes a second housing in the shape of an annular shape. The outer side wall of the second housing extends downward to form a second extension. The second extension and the second housing together form a second fixing groove. A plurality of second mounting inclined surfaces (501) are evenly arranged in the second fixing groove in the circumferential direction of the second housing. The third lamp plate (73) is fixedly installed on each of the second mounting inclined surfaces (501).

5. The adjustable height multi-angle light source according to claim 4, characterized in that, The workpiece (100) is placed on the predetermined inspection plane; The first lamp plate (71) is parallel to the detection plane; the angle between the first mounting inclined surface (401) and the detection plane is 30°; the angle between the second mounting inclined surface (501) and the detection plane is 70°.

6. The adjustable height multi-angle light source according to claim 5, characterized in that, Each of the first lamp board (71), the second lamp board (72) and the third lamp board (73) is provided with a diffuser plate (80) in its optical path.

7. The adjustable height multi-angle light source according to claim 5, characterized in that, An avoidance through hole (712) is provided on the first light panel (71) at the position corresponding to the supplementary light window (302), and an avoidance window (711) is provided at the position corresponding to each of the shooting windows (301).

8. The adjustable height multi-angle light source according to claim 7, characterized in that, The coaxial light source assembly (20) includes a housing, and a supplementary light unit (21) and a beam splitter (22) are provided inside the housing. The supplementary light unit (21) is perpendicular to the detection plane, and the angle between the beam splitter (22) and the detection plane is 45°. The light emitted by the supplementary light unit (21) is reflected by the beam splitter (22) and passes through the supplementary light window (302), the clearance through hole (712), the central through hole of the first fixing body (40) and the central through hole of the second fixing body (50) in sequence, and is directed perpendicularly to the detection plane.

9. The adjustable height multi-angle light source according to claim 7, characterized in that, A shooting window (301) is provided around each of the four sides of the supplementary lighting window (302). A curved chamfer (3011) is provided between the side wall of the shooting window (301) and the top edge of the shooting window (301).

10. A PCB board inspection device, characterized in that, It includes multiple imaging components for capturing surface images of a PCB board and an adjustable height multi-angle light source as described in any one of claims 1-9; The top of the housing of the coaxial light source assembly (20) is also provided with an image capture port facing the supplementary light window (302); Above the image capture port and each of the shooting windows (301), a shooting component is respectively provided for shooting surface images of the PCB board from different angles.

Images