Multi-mode visual inspection light source system

Abstract

The multi-mode visual inspection light source system comprises a mounting plate, a first linear light source is mounted on the upper portion of the mounting plate, and a second linear light source is mounted on the side face of the mounting plate; the first linear light source downwards emits light of a first color, the second linear light source horizontally emits light of a second color to one side, an inclined spectroscope is arranged between the mounting plate and the first linear light source, and the light of the first color penetrates through the inclined spectroscope and then vertically downwards irradiates the surface of a to-be-detected product. The light of the second color is reflected by the inclined spectroscope and then vertically and downwards irradiates the surface of the to-be-detected product, an annular light source is arranged at the bottom of the mounting plate and obliquely emits light of a third color, and the light of the third color obliquely irradiates the surface of the to-be-detected product; the light of the first color, the light of the second color and the light of the third color are mutually overlapped to irradiate the surface of a to-be-detected product; according to the invention, multi-angle and multispectral illumination information is synchronously provided in one exposure.

Description

Technical Field

[0001] This invention relates to the field of integrated detection light source technology, and in particular to a multimodal visual detection light source system. Background Technology

[0002] In modern industrial automated production systems, machine vision's inspection capabilities have a decisive impact on product quality control and production efficiency. As a core component of the vision system, the performance of the illumination source directly determines the clarity, contrast, and signal-to-noise ratio of the acquired images, thus profoundly affecting the accuracy and stability of feature extraction and defect identification in subsequent image processing.

[0003] Currently widely adopted lighting solutions often require multiple independent light sources and multiple camera shots when dealing with workpieces with complex structures and diverse surface characteristics to acquire complete defect information covering different angles and lighting conditions. This approach not only significantly increases the inspection cycle time and reduces the system response speed, but also results in low integration of the entire vision system and high hardware costs. Furthermore, to arrange multiple independent light sources, the vision device must have sufficient physical space. However, different light sources are prone to physical occlusion and optical path interference within a limited space, making it difficult to create a composite light field environment with uniform illumination and controllable optical paths on the workpiece surface. Although multiple shots can acquire multiple images, performing high-precision registration, comparison, and fusion analysis of these images is technically challenging. The operation is complex, and the reliability of the algorithm is difficult to guarantee, which may ultimately affect the overall stability and accuracy of defect detection. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of low detection efficiency and low system integration in the prior art, and to provide a multimodal visual inspection light source system that provides multi-angle and multi-spectral illumination information simultaneously in a single exposure, with a compact structure, and achieves high-efficiency, high-precision and highly adaptable visual inspection.

[0005] To achieve the above objectives, the present invention provides a multimodal visual inspection light source system, including a mounting plate. A first linear light source is mounted on the upper part of the mounting plate, emitting light of a first color downwards. A second linear light source is mounted on the side of the mounting plate, emitting light of a second color horizontally to one side. A tilting beam splitter is mounted between the mounting plate and the first linear light source. The light of the first color passes through the tilting beam splitter and then shines vertically downwards onto the surface of the product under test. The light of the second color is reflected by the tilting beam splitter and then shines vertically downwards onto the surface of the product under test. A ring light source is mounted on the bottom of the mounting plate, emitting light of a third color at an angle. The light of the third color shines obliquely onto the surface of the product under test. The first, second, and third colors of light overlap and illuminate the surface of the product under test.

[0006] Preferably, the first linear light source emits blue light downwards, and the first color is blue; the second linear light source emits red light horizontally to one side, and the second color is red; the ring light source emits green light at an angle, and the third color is green; the blue light, red light, and green light overlap and illuminate the surface of the product under test.

[0007] Preferably, the upper part of the mounting plate is equipped with a placement frame for placing the tilting beam splitter, the upper part of the placement frame is equipped with a first linear light source, and the side is equipped with a second linear light source.

[0008] Preferably, the placement frame includes a base plate fixedly connected to the mounting plate, a left side plate disposed on one side of the base plate, a right side plate disposed on the other side of the base plate, a front end plate disposed at one end of the base plate, a rear end plate disposed at the other end of the base plate, and a cover plate disposed on the upper part of the left and right side plates; the front end plate and the rear end plate are provided with inclined receiving grooves for accommodating the inclined beam splitter, and the lower part of the left side plate is provided with a first receiving groove for accommodating the side of the inclined beam splitter.

[0009] Preferably, the tilt angle of the tilted receiving groove is 45°, and the tilted beam splitter is installed inside the tilted receiving groove at a 45° angle. The second color light emitted by the second linear light source is reflected by the tilted beam splitter and then shines vertically downward onto the surface of the product to be tested.

[0010] Preferably, the cover plate is provided with a first U-shaped receiving groove for accommodating a first linear light source, and a first through groove for light of a first color to pass through. The front end plate and the rear end plate are respectively fixed to the two ends of the first linear light source. The right side plate is provided with a second U-shaped receiving groove for accommodating a second linear light source, and a second through groove for light of a second color to pass through. The front end plate and the rear end plate are respectively fixed to the two ends of the second linear light source. The bottom plate is provided with a third through groove for light of the first color and light of the second color to pass through.

[0011] Preferably, both the first and second linear light sources include a housing. The upper part of the housing is provided with a heat sink. Inside the housing, a PCB light-emitting board, a focusing rod, and a transparent plate are sequentially installed. The two ends of the housing are also provided with end caps for limiting the ends of the PCB light-emitting board, the focusing rod, and the transparent plate. The PCB light-emitting board is electrically connected to a first power line. The PCB light-emitting board is in close contact with the lower part of the heat sink. The light emitted by the PCB light-emitting board passes through the focusing rod and the transparent plate in sequence and is emitted outward.

[0012] Preferably, the ring light source includes a first ring PCB light-emitting board mounted on the upper part and a second ring PCB light-emitting board mounted on the lower part. The first and second ring PCB light-emitting boards are stacked and both emit light of a third color at an angle. The first ring PCB light-emitting board emits a wide-angle light of 60°, and the second ring PCB light-emitting board emits a narrow-angle light of 30°.

[0013] Preferably, the annular light source further includes an annular top cover mounted on the lower part of the mounting plate, an annular circumference mounted on the side of the annular top cover, and an annular base mounted on the lower part of the annular circumference; a first annular PCB light-emitting board is mounted between the annular top cover and the annular circumference, the first annular PCB light-emitting board being inclined, the upper part being limited by a first groove of the annular top cover, and the lower part being limited by a first support surface of the annular circumference; a second annular PCB light-emitting board is mounted between the annular circumference and the annular base, the second annular PCB light-emitting board being inclined, the upper part being limited by a second groove of the annular circumference, and the lower part being limited by a second support surface of the annular base.

[0014] Preferably, the first annular PCB light-emitting board is electrically connected to a second power line; the second annular PCB light-emitting board is electrically connected to a third power line; the inner side of the annular top cover is provided with a first inclined surface, and a first thermally conductive silicone is installed between the first inclined surface and the first annular PCB light-emitting board; the inner side of the annular circumference is provided with a second inclined surface, and a second thermally conductive silicone is installed between the second inclined surface and the second annular PCB light-emitting board.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention illuminates the surface of the product under test by superimposing light of a first color, a second color, and a third color; it provides multi-angle, multi-spectral illumination information simultaneously during a single exposure or camera acquisition process, and has a compact structure, achieving high efficiency, high precision, and high adaptability in visual inspection.

[0017] 2. This invention creatively uses a tilting beam splitter to combine the lateral and vertical light rays from two independent optical path spaces into one, achieving a high degree of spatial integration between the optical path and the light rays. Combined with the ring light source at the bottom, it integrates three different colors of illumination light within a small space. The light source system has a compact structure and is easy to integrate into various automated equipment, solving the problems of mechanical interference from multiple light sources and limited installation space. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a multimodal vision inspection light source system provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the optical path of a multimodal vision inspection light source system provided by the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of a multimodal vision inspection light source system provided by the present invention;

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a cross-sectional structural diagram of the first linear light source, the second linear light source, and the placement frame provided by the present invention;

[0024] Figure 6 This is an exploded cross-sectional view of the first linear light source, the second linear light source, and the placement frame provided by the present invention;

[0025] Figure 7 This is a cross-sectional structural schematic diagram of the first linear light source provided by the present invention;

[0026] Figure 8 This is a cross-sectional structural diagram of the placement frame provided by the present invention;

[0027] Figure 9 This is a schematic diagram of the ring light source provided by the present invention.

[0028] The diagram includes:

[0029] 1. Mounting plate; 2. First linear light source; 3. Second linear light source; 4. Inclined beam splitter; 5. Product under test; 6. Ring light source; 7. Placement frame; 71. Base plate; 72. Left side plate; 73. Right side plate; 74. Front end plate; 75. Rear end plate; 76. Cover plate; 77. Inclined receiving groove; 78. First receiving groove; 761. First U-shaped receiving groove; 762. First through groove; 731. Second U-shaped receiving groove; 732. Second through groove; 711. Third through groove; 21. Outer shell; 22. Heat sink; 23. PCB light-emitting board; 24. Focusing rod; 25. Transparent plate; 26. End cap; 61. First annular PCB light-emitting board; 62. Second annular PCB light-emitting board; 63. Annular top cover; 64. Annular circumference; 65. Annular base; 631. First groove; 642. First support surface; 641. Second groove; 651. Second support surface; 66. Second power cable; 67. Third power cable; 633. First inclined slope; 634. First thermally conductive silicone; 643. Second inclined slope; 644. Second thermally conductive silicone. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 9 This invention provides a multimodal visual inspection light source system.

[0032] like Figure 1 and Figure 2As shown, the multimodal visual inspection light source system includes a mounting plate 1 located in the middle. A first linear light source 2 is mounted on the upper part of the mounting plate 1, a second linear light source 3 is mounted on the right side, and a ring light source 6 is mounted on the lower part. The first linear light source 2 emits light of a first color vertically downwards, and the second linear light source 3 emits light of a second color horizontally to the left. A tilting beam splitter 4 is installed between the mounting plate 1 and the first linear light source 2. The light of the first color passes through the tilting beam splitter 4 and then shines vertically downwards onto the surface of the product under test 5. The light of the second color is reflected by the tilting beam splitter 4 and then shines vertically downwards onto the surface of the product under test 5. The tilting beam splitter 4 splits the two orthogonal light beams... The light sources are combined into a single optical path to achieve two-way composite illumination. Furthermore, the ring light source 6 is arranged circumferentially around the product under test 5, emitting a uniform ring light of a third color at an angle. The third-color light obliquely illuminates the surface of the product under test 5, further forming multi-angle, multi-spectral synergistic illumination with the two-way composite illumination. At this time, the first-color light, the second-color light, and the third-color light are superimposed to illuminate the surface of the product under test 5, forming a multi-dimensional, high-contrast composite light field, which significantly improves the recognition accuracy of surface fine scratches, product outlines, uneven color or stains on the product surface. Each light source is independently controllable and supports dynamic switching of illumination modes to adapt to different workpiece shapes and testing requirements.

[0033] In this embodiment, the first linear light source 2 emits blue light downwards, and the first color is blue; the second linear light source 3 emits red light horizontally to one side, and the second color is red; the ring light source 6 emits green light at an angle, and the third color is green; the blue light, red light and green light overlap and illuminate the surface of the product under test 5.

[0034] In other embodiments, the first color is red, the second color is blue, and the third color is green, or other spectral combinations can be flexibly configured according to detection requirements to ensure optimal imaging effects under different materials, reflective properties, and surface conditions.

[0035] In other embodiments, the first color is green, the second color is blue, and the third color is red. As long as the basic principle of high contrast and multi-angle coordinated illumination can be formed by superimposing the three colors, the color combination can be dynamically adjusted according to the actual detection scenario.

[0036] In actual inspection, different defects have different sensitivities to light at different angles. This embodiment provides a composite light field that can simultaneously produce a high-contrast response to fine scratches on flat areas (highlighted by vertical blue light or low-angle red light), missing outlines of three-dimensional structures (outlined by low-angle red light and ring green light), and uneven color or stains on the surface (uniformly illuminated by ring green light). The composite light field can cover the inspection needs of most common defect types, reduce the number of vision stations on the production line, and simplify the production process.

[0037] like Figure 5 As shown, the upper part of the mounting plate 1 is equipped with a placement frame 7 for placing the tilting beam splitter 4. The upper part of the placement frame 7 is equipped with a first linear light source 2, and the side is equipped with a second linear light source 3.

[0038] The placement frame 7 is used to place the tilting beam splitter 4 and connect it to the first linear light source 2 and the second linear light source 3 respectively, so as to achieve stable positioning and fixation of each component.

[0039] like Figure 5 and Figure 8 As shown, the placement frame 7 is a cuboid with six sides, including a base plate 71 fixedly connected to the mounting plate 1, a left side plate 72 on one side of the base plate 71, a right side plate 73 on the other side of the base plate 71, a front end plate 74 at one end of the base plate 71, a rear end plate 75 at the other end of the base plate 71, and a cover plate 76 on the upper part of the left side plate 72 and the right side plate 73. In order to install the tilting beam splitter 4, the front end plate 74 and the rear end plate 75 are provided with tilting receiving grooves 77 for accommodating the tilting beam splitter 4, and the lower part of the left side plate 72 is provided with a first receiving groove 78 for accommodating the side of the tilting beam splitter 4. When installing the tilting beam splitter 4, the tilting beam splitter 4 is tilted and placed inside the placement frame 7, and the lower part is limited by the first receiving groove 78. Then, the tilting receiving grooves 77 on the front end plate 74 and the rear end plate 75 are used to clamp and fix it, ensuring that the beam splitter has a stable angle and no deviation during long-term operation.

[0040] In order to convert the second color light emitted horizontally to the left by the second linear light source 3 into a vertical direction, the tilting beam splitter 4 accurately reflects the second color beam at a 45° angle, so that it intersects and superimposes with the first color beam emitted vertically downward by the first linear light source 2 on the surface of the product under test 5; therefore, the tilting angle of the tilting receiving groove 77 is designed to be 45°, which is strictly matched with the actual working angle of the beam splitter, thereby ensuring the constancy and repeatability of the optical path geometry; the second color light emitted by the second linear light source 3 is reflected by the tilting beam splitter 4 and then shines vertically downward onto the surface of the product under test 5.

[0041] like Figure 5 and Figure 6As shown, the cover plate 76 is provided with a first U-shaped receiving groove 761 for accommodating the first linear light source 2. The first linear light source 2 is installed in the first U-shaped receiving groove 761 and is integrally fixed with the cover plate 76. In order to allow the first color light emitted by the first linear light source 2 to pass through, the cover plate 76 is provided with a first through groove 762 for the first color light to pass through. The first color light passes through the first through groove 762 to reach the tilting beam splitter 4, and then continues to be emitted downwards through the tilting beam splitter 4. In order to completely fix the first linear light source 2, The front end plate 74 and the rear end plate 75 are provided with threaded holes, which can be fixed to the end caps 26 at both ends of the first linear light source 2. Similarly, in order to fix the second linear light source 3, the right side plate 73 is provided with a second U-shaped receiving groove 731 for accommodating the second linear light source 3. In order to allow the second color light emitted by the second linear light source 3 to pass smoothly, the right side plate 73 is also provided with a second through groove 732. Its two ends are also locked and fixed to the end caps 26 through the threaded holes on the front end plate 74 and the rear end plate 75 to ensure zero positional deviation of the two light sources and long-term stability of the optical axis.

[0042] In addition, in order to facilitate the passage of light of the first color and light of the second color, the base plate 71 is provided with a third through groove 711 for light of the first color and light of the second color to pass through.

[0043] The light of the first color reaches the tilted beam splitter 4 and then continues to shine downward through the tilted beam splitter 4; it shines outward through the third through groove 711; the light of the second color is reflected by the tilted beam splitter 4 and also shines vertically downward through the third through groove 711, forming a high-contrast, ghost-free composite light on the surface of the product under test 5 with the light of the first color.

[0044] like Figure 7 As shown, both the first linear light source 2 and the second linear light source 3 include a housing 21. A heat sink 22 is provided on the upper part of the housing 21. A PCB light-emitting board 23, a focusing rod 24, and a transparent plate 25 are sequentially installed inside the housing 21. End caps 26 are also provided at both ends of the housing 21 to limit the ends of the PCB light-emitting board 23, the focusing rod 24, and the transparent plate 25. The PCB light-emitting board 23 is electrically connected to a first power line. For heat dissipation, the PCB light-emitting board 23 is closely attached to the lower part of the heat sink 22, and the middle is filled with high thermal conductivity silicone grease to ensure efficient heat conduction to the heat sink 22. The first power line provides power and control signals to the PCB light-emitting board 23, causing the PCB light-emitting board 23 to emit light. The red or blue light is collimated by the focusing rod 24 and then evenly emitted through the transparent plate 25.

[0045] like Figure 3As shown, the ring light source 6 includes a first ring PCB light-emitting board 61 mounted on the upper part and a second ring PCB light-emitting board 62 mounted on the lower part. The first ring PCB light-emitting board 61 and the second ring PCB light-emitting board 62 are stacked and both emit light of a third color at an angle. In this embodiment, the first ring PCB light-emitting board 61 emits a wide-angle light of 60° outward, and the second ring PCB light-emitting board 62 emits a narrow-angle light of 30° outward.

[0046] In other embodiments, the ring light source 6 can be a multi-layer ring PCB light-emitting board stack combination, which can be three, four or even more layers. The tilt angle of the light-emitting board can be different gradients such as 75°, 45°, 15°, etc., to meet different detection requirements, thereby realizing multi-angle three-dimensional illumination of complex curved surfaces, small grooves and highly reflective areas.

[0047] like Figure 4 As shown, the annular light source 6 further includes an annular upper cover 63 installed on the lower part of the mounting plate 1, an annular circumference 64 installed on the side of the annular upper cover 63, and an annular base 65 installed on the lower part of the annular circumference 64; a first annular PCB light-emitting board 61 is installed between the annular upper cover 63 and the annular circumference 64. The first annular PCB light-emitting board 61 is inclined, with its upper part limited by the first groove 631 of the annular upper cover 63 and its lower part limited by the first support surface 642 of the annular circumference 64; similarly, a second annular PCB light-emitting board 62 is installed between the annular circumference 64 and the annular base 65. The second annular PCB light-emitting board 62 is inclined, with its upper part limited by the second groove 641 of the annular circumference 64 and its lower part limited by the second support surface 651 of the annular base 65.

[0048] like Figure 9 As shown, the first annular PCB light-emitting board 61 is electrically connected to the second power line 66; the second annular PCB light-emitting board 62 is electrically connected to the third power line 67.

[0049] like Figure 4 As shown, the inner side of the annular top cover 63 is provided with a first inclined surface 633, which precisely matches the inclination angle of the first annular PCB light-emitting board 61 to ensure that the light emission direction is stable and controllable. For heat dissipation, a first thermally conductive silicone 634 is installed between the first inclined surface 633 and the first annular PCB light-emitting board 61. Similarly, the inner side of the annular circumference 64 is provided with a second inclined surface 643, which strictly corresponds to the inclination angle of the second annular PCB light-emitting board 62, and is filled with a second thermally conductive silicone 644.

[0050] All light source components in the light source detection system (blue linear light, red linear light, and inner and outer rings of green ring light) can be independently controlled for their on / off state, brightness, and spectrum. Users or host computer software can flexibly combine dozens or even hundreds of lighting formulas based on the characteristics of the object being inspected; for example, "strong blue light + weak red light + inner ring green light" is used to detect surface scratches, while "blue light off + strong red light + outer ring green light" is used to detect raised contours. Combined with image feedback, the system can fine-tune the lighting parameters to compensate for environmental changes and material differences, ensuring long-term stable image quality and significantly reducing reliance on operators and maintenance costs.

[0051] Optical path diagram of the light source detection system:

[0052] like Figure 2 As shown, the PCB light-emitting board 23 in the first linear light source 2 emits blue light downwards. After being collimated by the first lens 24, it passes vertically through the transparent plate 25 and shines downwards to the tilting beam splitter 4. It then continues to shine downwards through the tilting beam splitter 4, passes through the third through groove 711 and shines outwards, and passes through the ring light source 6 to reach the surface of the product under test 5.

[0053] The PCB light-emitting board 23 in the second linear light source 3 emits red light horizontally to the left. After being collimated by the first lens 24, it passes horizontally through the transparent plate 25 and is emitted to the left. After reaching the tilting beam splitter 4, it is reflected by the tilting beam splitter 4 and then passes through the third through groove 711 and is emitted vertically downward. It is then uniformly projected onto the surface of the product 5 to be tested through the light-transmitting area of ​​the ring light source 6.

[0054] The ring light source 6 emits green light at an angle, the first ring PCB light-emitting board 61 emits a 60° wide-angle light outward, and the second ring PCB light-emitting board 62 emits a 30° narrow-angle light outward; the green light surrounds the surface of the product under test 5.

[0055] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A multimodal visual inspection light source system, characterized in that: The device includes a mounting plate (1), on the upper part of which a first linear light source (2) is installed. The first linear light source (2) emits light of a first color downwards. A second linear light source (3) is installed on the side of the mounting plate (1). The second linear light source (3) emits light of a second color horizontally to one side. An inclined beam splitter (4) is installed between the mounting plate (1) and the first linear light source (2). The light of the first color passes through the inclined beam splitter (4) and shines vertically downwards onto the surface of the product to be tested (5). The light of the second color is reflected by the inclined beam splitter (4) and shines vertically downwards onto the surface of the product to be tested (5). An annular light source (6) is installed at the bottom of the mounting plate (1). The annular light source (6) emits light of a third color at an angle. The light of the third color shines at an angle onto the surface of the product to be tested (5). The light of the first color, the light of the second color, and the light of the third color overlap and shine on the surface of the product to be tested (5).

2. The multimodal visual inspection light source system according to claim 1, characterized in that: The first linear light source (2) emits blue light downwards, and the first color is blue; the second linear light source (3) emits red light horizontally to one side, and the second color is red; the ring light source (6) emits green light at an angle, and the third color is green; the blue light, red light and green light overlap and illuminate the surface of the product under test (5).

3. The multimodal visual inspection light source system according to claim 1, characterized in that: The mounting plate (1) is equipped with a placement frame (7) for placing the tilting beam splitter (4) on the upper part. The placement frame (7) is equipped with a first linear light source (2) on the upper part and a second linear light source (3) on the side.

4. The multimodal visual inspection light source system according to claim 3, characterized in that: The placement frame (7) includes a base plate (71) fixedly connected to the mounting plate (1), a left side plate (72) disposed on one side of the base plate (71), a right side plate (73) disposed on the other side of the base plate (71), a front end plate (74) disposed at one end of the base plate (71), a rear end plate (75) disposed at the other end of the base plate (71), and a cover plate (76) disposed on the upper part of the left side plate (72) and the right side plate (73); the front end plate (74) and the rear end plate (75) are provided with inclined receiving grooves (77) for accommodating the tilted beam splitter (4), and the lower part of the left side plate (72) is provided with a first receiving groove (78) for accommodating the side of the tilted beam splitter (4).

5. The multimodal visual inspection light source system according to claim 4, characterized in that: The tilt angle of the tilted receiving groove (77) is 45°. The tilted beam splitter (4) is installed inside the tilted receiving groove (77) and is also set at 45°. The second color light emitted by the second linear light source (3) is reflected by the tilted beam splitter (4) and shines vertically downward onto the surface of the product to be tested (5).

6. The multimodal visual inspection light source system according to claim 4, characterized in that: The cover plate (76) is provided with a first U-shaped receiving groove (761) for accommodating the first linear light source (2), and the cover plate (76) is provided with a first through groove (762) for light of the first color to pass through. The front end plate (74) and the rear end plate (75) are respectively fixed to the two ends of the first linear light source (2). The right side plate (73) is provided with a second U-shaped receiving groove (731) for accommodating the second linear light source (3), and the right side plate (73) is provided with a second through groove (732) for light of the second color to pass through. The front end plate (74) and the rear end plate (75) are respectively fixed to the two ends of the second linear light source (3). The bottom plate (71) is provided with a third through groove (711) for light of the first color and light of the second color to pass through.

7. The multimodal visual inspection light source system according to claim 1, characterized in that: Both the first linear light source (2) and the second linear light source (3) include a housing (21). The upper part of the housing (21) is provided with a heat sink (22). The PCB light-emitting board (23), the light-concentrating rod (24) and the transparent plate (25) are installed in sequence inside the housing (21). The two ends of the housing (21) are also provided with end caps (26) for limiting the two ends of the PCB light-emitting board (23), the light-concentrating rod (24) and the transparent plate (25). The PCB light-emitting board (23) is electrically connected to a first power line. The PCB light-emitting board (23) is close to the lower part of the heat sink (22). The PCB light-emitting board (23) emits light, which passes through the light-concentrating rod (24) and the transparent plate (25) in sequence and is emitted outward.

8. The multimodal visual inspection light source system according to claim 1, characterized in that: The ring light source (6) includes a first ring PCB light-emitting board (61) installed at the top and a second ring PCB light-emitting board (62) installed at the bottom. The first ring PCB light-emitting board (61) and the second ring PCB light-emitting board (62) are stacked and both emit light of a third color at an angle. The first ring PCB light-emitting board (61) emits a wide-angle light of 60° outward and the second ring PCB light-emitting board (62) emits a narrow-angle light of 30° outward.

9. A multimodal visual inspection light source system according to claim 8, characterized in that: The ring light source (6) further includes an annular top cover (63) installed on the lower part of the mounting plate (1), an annular circumference (64) installed on the side of the annular top cover (63), and an annular base (65) installed on the lower part of the annular circumference (64); a first annular PCB light-emitting board (61) is installed between the annular top cover (63) and the annular circumference (64), the first annular PCB light-emitting board (61) is inclined, the upper part is limited by the first groove (631) of the annular top cover (63), and the lower part is limited by the first support surface (642) of the annular circumference (64); a second annular PCB light-emitting board (62) is installed between the annular circumference (64) and the annular base (65), the second annular PCB light-emitting board (62) is inclined, the upper part is limited by the second groove (641) of the annular circumference (64), and the lower part is limited by the second support surface (651) of the annular base (65).

10. A multimodal visual inspection light source system according to claim 9, characterized in that: The first annular PCB light-emitting board (61) is electrically connected to a second power line (66); the second annular PCB light-emitting board (62) is electrically connected to a third power line (67); the inner side of the annular top cover (63) is provided with a first inclined slope (633), and a first thermally conductive silicone (634) is installed between the first inclined slope (633) and the first annular PCB light-emitting board (61); the inner side of the annular circumference (64) is provided with a second inclined slope (643), and a second thermally conductive silicone (644) is installed between the second inclined slope (643) and the second annular PCB light-emitting board (62).

Images