Corner coaxial light source module integrating ring light

Abstract

The utility model discloses a corner coaxial light source module of integrated annular light, include: coaxial light source subassembly, the coaxial light source subassembly includes coaxial main seat, first LED circuit board and half -transparent half -reflective beam splitter, the first observation opening is seted up in the upper end portion of coaxial main seat, the first light outlet is seted up in one side of coaxial main seat, first LED circuit board sets up in the other side of coaxial main seat relative to first light outlet, connecting piece, the center of connecting piece is provided with second light hole, and one end of connecting piece is connected with coaxial main seat, and the annular light source subassembly is connected with the other end of connecting piece, and this annular light source subassembly includes annular light source support, second diffusion plate and second LED circuit board, the center of annular light source support forms third light hole, and one end of annular light source support is fixed to the outside of connecting piece. The utility model solves the technical problem of each component space interference and realizes the perfect complement of the advantage light path simultaneously, and greatly enriches the detection ability.

Description

Technical Field

[0001] This utility model relates to the field of detection light source equipment technology, and in particular to a corner coaxial light source module with integrated ring light. Background Technology

[0002] In machine vision inspection, coaxial light sources are the preferred choice for workpieces with smooth surfaces or those requiring highlighting minute surface irregularities due to their ability to provide vertical, uniform, and shadowless illumination. However, traditional direct-light coaxial light sources have significant limitations in practical applications:

[0003] 1. Spatial layout conflict: The optical path of a traditional coaxial light source is completely aligned with the optical axis of the camera. Its physical structure must be located directly below the camera lens and between the object being measured. This structure occupies the vertical space directly in front of the camera. When the detection space is limited (e.g., height is limited on the production line), or the workpiece itself is tall, or it needs to work in conjunction with other side light sources (such as ring light or strip light), the physical components of the coaxial light source will physically interfere with the mechanical structure, workpiece, or other light sources, making installation or debugging difficult.

[0004] 2. Limited functionality: Standard coaxial light sources can only provide vertical illumination. For workpieces that need to simultaneously detect surface defects and contours and edges, additional light sources such as ring light sources are often required for supplementary lighting or contour illumination. If independent coaxial light sources and ring light sources are used, not only is more installation space required, but there are also difficulties in calibrating the relative positions of the two light sources and in accurately superimposing the optical paths, which affects the detection accuracy and stability. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an integrated ring light corner coaxial light source module. This invention solves the technical problem of spatial interference between components and achieves perfect complementarity of advantageous light paths. It can turn on two light sources independently or simultaneously, achieving a composite lighting effect that a single light source cannot achieve, greatly enriching the detection capabilities.

[0006] To achieve the above objectives, this utility model provides a corner coaxial light source module with integrated ring light, comprising:

[0007] A coaxial light source assembly includes a coaxial main base, a first LED circuit board, and a semi-transparent and semi-reflective beam splitter. A first observation port is provided at the upper end of the coaxial main base, and a first light outlet is provided on one side of the coaxial main base. The first LED circuit board is disposed on the other side of the coaxial main base opposite to the first light outlet. The semi-transparent and semi-reflective beam splitter is obliquely disposed between the first light outlet and the first LED circuit board, and is placed directly below the first observation port.

[0008] A connector, wherein a second light-transmitting hole is provided at the center of the connector, and one end of the connector is connected to a coaxial main seat, and the second light-transmitting hole is coaxially aligned with the first light-emitting port;

[0009] A ring light source assembly connected to the other end of the connector includes a ring light source bracket, a second diffuser plate, and a second LED circuit board. A third light-passing hole is formed in the center of the ring light source bracket. One end of the ring light source bracket is fixed to the outside of the connector, so that the third light-passing hole is coaxially aligned with the second light-passing hole of the connector. The second diffuser plate is disposed at the other end of the ring light source bracket. The second LED circuit board is installed on the inside of the ring light source bracket and faces the second diffuser plate.

[0010] Furthermore, the semi-transparent and semi-reflective beam splitter includes a beam splitter body and a reflective film and an anti-reflective film respectively disposed at the front and rear ends of the beam splitter body. The side of the semi-transparent and semi-reflective beam splitter with the reflective film faces the first observation port, and the side of the semi-transparent and semi-reflective beam splitter with the anti-reflective film faces the first LED circuit board.

[0011] Furthermore, the semi-transparent and semi-reflective beam splitter is inclined at 45° inside the coaxial main base.

[0012] Furthermore, the coaxial main seat is assembled from two side plates, a bottom plate, a cover plate, and a front plate. A first heat dissipation main seat is fixed to the rear side of the bottom plate and the cover plate. The first LED circuit board is tightly fixed to the first heat dissipation main seat. A first slot, a second slot, and a third slot for engaging the semi-transparent and semi-reflective beam splitter are respectively provided on the inner walls of the two side plates, the bottom plate, and the cover plate. The four edges of the semi-transparent and semi-reflective beam splitter are respectively engaged in the first slot, the second slot, and the third slot.

[0013] Furthermore, buffer pads are provided on the first card slot, the second card slot, and the third card slot.

[0014] Furthermore, a first diffuser plate is provided between the semi-transparent and semi-reflective beam splitter and the first LED circuit board, and the first diffuser plate is snapped into the coaxial main seat.

[0015] Furthermore, the connector is provided with an intensifying lens, which covers the second light-transmitting hole.

[0016] Furthermore, the ring light source bracket includes an interconnected ring base and an annular circumference. The ring base is detachably connected to the connector. A first mounting cavity is formed on the inner wall of the ring base. A fourth snap-fit ​​groove is provided in the first mounting cavity. A fifth snap-fit ​​groove is provided in the annular circumference. The second LED circuit board is mounted in the first mounting cavity and abuts against the fourth and fifth snap-fit ​​grooves.

[0017] Furthermore, the second LED circuit board has an overall ring-shaped horn-shaped structure.

[0018] Furthermore, the second diffuser plate includes a fixed part, a light-transmitting part, and a light-transmitting wrapping part. The fixed part is detachably connected to the annular circumference. A sixth locking groove is provided on the annular base. The light-transmitting wrapping part abuts against the sixth locking groove. The light-transmitting part has a trumpet-shaped structure.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention achieves an integrated structural design by connecting a corner coaxial optical path based on a beam splitter with an independent ring light source. The coaxial light is responsible for highlighting two-dimensional features such as surface texture, scratches, and pits; the ring light (which can be designed at different angles as needed) is responsible for providing a sense of three-dimensionality, highlighting three-dimensional features such as edge contours and height differences. Users can turn on the two light sources independently or simultaneously according to their detection needs, achieving a composite lighting effect that cannot be achieved by a single light source, greatly enriching the detection capabilities. Compared with the solution of splicing multiple independent components, the integrated structure has higher mechanical strength, is more resistant to vibration and impact, and ensures optical accuracy during long-term use.

[0021] Since both the ring light source and the coaxial light source (LED part) are located on the side, users can independently control their brightness and switching timing. For example, they can use only the coaxial light to detect the plane, only the ring light to detect the edge, or both can be turned on simultaneously with a specific light intensity ratio to meet the most complex needs for simultaneous detection of surfaces and contours.

[0022] This invention uses a semi-transparent, semi-reflective beam splitter to "turn" the LED light-emitting part of the coaxial light to the side of the camera. This means that the light-emitting components and main physical structure of the light source no longer occupy the valuable space directly below the camera lens, leaving ample vertical space for the workpiece, fixture, or other auxiliary equipment. It is particularly suitable for compact vision systems with limited inspection space.

[0023] By precisely integrating the corner coaxial optical path system and the ring light source into a rigid module frame, this integrated design ensures that the optical path centers of the ring light and the coaxial light always maintain a strict coaxial relationship with the camera optical axis, eliminating the alignment error that exists when installing independent light sources. After one installation and calibration, the relative positions of the two optical paths remain fixed, greatly improving the repeatability and stability of the detection system.

[0024] Users no longer need to purchase, install, and calibrate separate coaxial and ring lights. This module provides a "plug-and-play" integrated solution. With just one installation and calibration, users can obtain two mature and accurate lighting modes, which greatly reduces the difficulty of building, debugging time, and maintenance costs of machine vision systems. Attached Figure Description

[0025] To more clearly illustrate the technology 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of a corner coaxial light source module integrating ring light according to the present invention;

[0027] Figure 2 yes Figure 1 A schematic cross-sectional view along line AA in the middle;

[0028] Figure 3 yes Figure 1 A schematic diagram of the decomposition process;

[0029] Figure 4 This is a schematic diagram of the coaxial light source assembly of this utility model;

[0030] Figure 5 This is a structural schematic diagram of the connector of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the annular base of this utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the second diffuser plate of this utility model.

[0033] The diagram includes:

[0034] 1. Coaxial light source assembly; 11. Coaxial main base; 111. Side plate; 1111. First slot; 112. Base plate; 1121. Second slot; 113. Cover plate; 1131. Third slot; 114. Front end plate; 115. First heat dissipation main base; 12. First LED circuit board; 13. Semi-transparent and semi-reflective beam splitter; 14. First light outlet; 15. First observation port; 16. First diffuser plate; 2. Connector; 21. Second light transmission hole; 22. 3. Connecting slot; 3. Ring light source assembly; 31. Ring light source bracket; 311. Ring base; 3111. First mounting cavity; 3112. Fourth slot; 3113. Sixth slot; 312. Ring circumference; 3121. Fifth slot; 32. Second diffuser plate; 321. Fixed part; 322. Light-transmitting part; 323. Light-transmitting wrapping part; 33. Second LED circuit board; 34. Third light-transmitting hole; 4. Buffer pad; 5. Lens. Detailed Implementation

[0035] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0038] like Figures 1 to 7 The present invention discloses an integrated ring light corner coaxial light source module, including a coaxial light source assembly 1, a connector 2 and a ring light source assembly 3;

[0039] like Figure 1 , Figure 2 and Figure 4As shown, with the X-axis as the horizontal direction and the Z-axis as the vertical direction, in this embodiment, the coaxial light source assembly 1 includes a coaxial main base 11, a first LED circuit board 12, and a semi-transparent and semi-reflective beam splitter 13. A first observation port 15 is provided at the upper end of the coaxial main base 11, and a first light outlet 14 is provided on one side of the coaxial main base 11. The first LED circuit board 12 is disposed on the other side of the coaxial main base 11 opposite to the first light outlet 14. The semi-transparent and semi-reflective beam splitter 13 is obliquely disposed between the first light outlet 14 and the first LED circuit board 12, and is placed directly below the first observation port 15. The semi-transparent and semi-reflective beam splitter 13 and A first diffuser plate 16 is also provided between the first LED circuit boards 12. The first diffuser plate 16 is snapped into the coaxial main base 11. Preferably, the semi-transparent and semi-reflective beam splitter 13 is tilted at 45° inside the coaxial main base 11. Thus, during the test, the camera is directly mounted on the first observation port 15 to take pictures vertically downward. The light is emitted from the first LED circuit board 12, and after passing through the semi-transparent and semi-reflective beam splitter 13, it is directed along the X-axis to the first light outlet 14 to illuminate the object under test. After being reflected back to the semi-transparent and semi-reflective beam splitter 13 by the object under test, it enters the camera's field of view through the reflection of the semi-transparent and semi-reflective beam splitter 13, thus achieving the coaxial illumination effect.

[0040] like Figure 3 As shown, in this embodiment, the coaxial main seat 11 is a hollow frame structure assembled from two side plates 111, a bottom plate 112, a cover plate 113, and a front end plate 114. A first heat dissipation main seat 115 is fixedly connected to the rear side of the bottom plate 112 and the cover plate 113. Specifically, the upper and lower ends of the first heat dissipation main seat 115 are detachably connected to the bottom plate 112 and the cover plate 113 respectively by screws or other connecting accessories to enhance the stability of the overall structure and improve heat dissipation efficiency. The first heat dissipation main seat 115 is generally made of copper, aluminum, or aluminum alloy to ensure good thermal conductivity. Preferably, heat dissipation fins can also be provided on the outer side of the first heat dissipation main seat 115 to increase the heat dissipation efficiency of the first heat dissipation main seat 115. The heat dissipation performance of LED circuit board 15 ensures the stability of LED circuit board 12. LED circuit board 12 is closely attached to the inner side of the first heat dissipation base 115 and fixed with screws and other connecting accessories to ensure that it is in full contact with the first heat dissipation base 115 to achieve efficient heat dissipation. The inner walls of the two side plates 111, the bottom plate 112 and the cover plate 113 are respectively provided with a first slot 1111, a second slot 1121 and a third slot 1131 for snapping on the semi-transparent and semi-reflective beam splitter 13. The four edges of the semi-transparent and semi-reflective beam splitter 13 are respectively snapped into the first slot 1111, the second slot 1121 and the third slot 1131 to achieve a stable installation and facilitate disassembly and maintenance.

[0041] Preferably, buffer pads 4 are provided on the first slot 1111, the second slot 1121, and the third slot 1131. These buffer pads 4 are made of silicone or rubber. Further, the buffer pads 4 can be circular in structure. Several circular mounting slots can be provided on the first slot 1111 for installation. For example, two circular mounting slots can be provided on the first slot 1111, with the positions of the two circular mounting slots dividing the first slot 1111 into three equal segments. A circular buffer pad 4 is embedded in each circular mounting slot, so that the side of the semi-transparent, semi-reflective beam splitter 13 forms an elastic contact with the slot, thus avoiding damage to the mirror caused by rigid compression. Even with surface damage, it can maintain positional stability under vibration. The flexibility of the buffer pad 4 also allows for fine-tuning of the beam splitter's angle during assembly, ensuring it maintains a strict 45° tilt, thereby guaranteeing the accuracy of the light reflection path and improving imaging quality and detection precision. Alternatively, the buffer pad 4 can be set as a long strip and directly embedded in the second slot 1121 and the third slot 1131 to prevent mechanical damage to the semi-transparent and semi-reflective beam splitter 13 during installation or vibration, while ensuring the stability of its tilt angle. The buffer pad 4 can also effectively reduce stress deformation caused by thermal expansion and contraction, ensuring the long-term reliable operation of the optical system.

[0042] It should be noted that the first slots 1111 on the two side plates 111 are symmetrically distributed to ensure that the semi-transparent and semi-reflective beam splitter 13 is subjected to balanced forces on both sides during installation, further improving assembly accuracy and structural stability. At the same time, the first slots 1111 are at a 45° angle to the horizontal direction to ensure that the semi-transparent and semi-reflective beam splitter 13 can accurately reflect the incident light to the center of the photosensitive surface of the imaging sensor after installation, reducing optical path offset errors.

[0043] like Figure 3 and Figure 5 As shown, the connector 2 is a hollow ring structure with a second light-passing hole 21 at its center. One end of the connector 2 is connected to the coaxial main seat 11. The second light-passing hole 21 is coaxially aligned with the first light-emitting port 14. An intensifying lens 5 is provided on the connector 2, covering the second light-passing hole 21. Specifically, a connecting card slot 22 is provided on the connector 2, and the intensifying lens 5 is directly fixed in the connecting card slot 22. The outer surface of the intensifying lens 5 is flush with the end face of the connector 2 to avoid dust accumulation or damage from external impacts, while ensuring that there is no additional refraction interference when the light path passes through. The diameter of the second light-passing hole 21 matches that of the first light-emitting port 14, forming a continuous and unobstructed light channel, effectively reducing stray light entering the imaging system.

[0044] In some embodiments, the connector slot 22 is also provided with an elastic sealing ring to ensure that the lens is securely installed and has anti-loosening properties, and can maintain optical alignment accuracy even if it is subjected to vibration during equipment operation.

[0045] The ring light source assembly 3 is connected to the other end of the connector 2. The ring light source assembly 3 includes a ring light source bracket 31, a second diffuser plate 32, and a second LED circuit board 33. The second LED circuit board 33 has an overall ring-shaped horn structure. A third light-transmitting hole 34 is formed in the center of the ring light source bracket 31. One end of the ring light source bracket 31 is fixed to the outside of the connector 2, so that the third light-transmitting hole 3421 is coaxially aligned with the second light-transmitting hole 21 of the connector 2. The second diffuser plate 32 is disposed at the other end of the ring light source bracket 31. The second LED circuit board 33 is installed inside the ring light source bracket 31 and faces the second diffuser plate 32.

[0046] Preferably, in this embodiment, as Figure 3 and Figure 6 As shown, the ring light source bracket 31 includes an annular base 311 and an annular circumference 312 connected to each other. The annular base 311 is detachably connected to the connector 2. A first mounting cavity 3111 is formed on the inner wall of the annular base 311. A fourth snap-fit ​​groove 3112 is provided in the first mounting cavity 3111. A fifth snap-fit ​​groove 3121 is provided in the annular circumference 312. The second LED circuit board 33 is installed in the first mounting cavity 3111 and abuts against the fourth snap-fit ​​groove 3112 and the fifth snap-fit ​​groove 3121.

[0047] like Figure 3 and Figure 7 As shown, the second diffuser plate 32 in this embodiment includes a fixed part 321, a light-transmitting part 322, and a light-transmitting wrapping part 323. The fixed part 321 is detachably connected to the annular circumference 312. A sixth locking groove 3113 is provided on the annular base 311. The light-transmitting wrapping part 323 abuts against the sixth locking groove 3113. The light-transmitting part 322 has a trumpet-shaped structure. The trumpet-shaped structure of the light-transmitting part 322 corresponds to the annular trumpet-shaped design of the second LED circuit board 33, so that the light is emitted more evenly forward after multiple scatterings, effectively eliminating local bright spots and dark areas and improving the consistency of lighting. The light-transmitting wrapping part 323 abuts tightly against the sixth locking groove 3113 to form a dustproof and sealed structure, preventing external impurities from entering the optical path system and ensuring long-term working stability. Of course, the light-transmitting wrapping part 323 can also allow the light from the second LED circuit board 33 to pass through, ensuring the integrity and uniformity of the light source output.

[0048] Through the above-described structural design, this utility model achieves a high degree of integration and optimization of the optical path system, which not only improves the uniformity of illumination and optical efficiency, but also enhances the sealing and shock resistance between components, effectively ensuring the stability of imaging quality. The connecting parts adopt a snap-fit ​​and elastic sealing method, which facilitates assembly and maintenance, and at the same time adapts to the long-term operation requirements in complex working environments, and has good practicality and reliability.

[0049] In addition, the modular design of the ring light source assembly 3 facilitates the quick replacement of LED circuit boards with different color temperatures or light intensities to adapt to various detection scenarios. The trumpet-shaped curvature of the light-transmitting part 322 has been optimized through optical simulation to maximize the use of light source energy while ensuring uniform light output and reducing ineffective radiation.

[0050] 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, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A corner coaxial light source module integrating ring light, characterized in that, include: A coaxial light source assembly (1) includes a coaxial main base (11), a first LED circuit board (12), and a semi-transparent and semi-reflective beam splitter (13). A first observation port (15) is provided at the upper end of the coaxial main base (11), and a first light outlet (14) is provided on one side of the coaxial main base (11). The first LED circuit board (12) is disposed on the other side of the coaxial main base (11) opposite to the first light outlet (14). The semi-transparent and semi-reflective beam splitter (13) is obliquely disposed between the first light outlet (14) and the first LED circuit board (12), and is placed directly below the first observation port (15). The connector (2) has a second light-transmitting hole (21) at its center, and one end of the connector (2) is connected to the coaxial main seat (11). The second light-transmitting hole (21) is coaxially aligned with the first light-emitting port (14). The ring light source assembly (3) is connected to the other end of the connector (2). The ring light source assembly (3) includes a ring light source bracket (31), a second diffuser plate (32) and a second LED circuit board (33). A third light-transmitting hole (34) is formed in the center of the ring light source bracket (31). One end of the ring light source bracket (31) is fixed to the outside of the connector (2) so that the third light-transmitting hole (34) is coaxially aligned with the second light-transmitting hole (21) of the connector (2). The second diffuser plate (32) is disposed at the other end of the ring light source bracket (31). The second LED circuit board (33) is installed inside the ring light source bracket (31) and faces the second diffuser plate (32).

2. The integrated ring light corner coaxial light source module according to claim 1, characterized in that, The semi-transparent and semi-reflective beam splitter (13) includes a beam splitter body and a reflective film and an anti-reflective film respectively disposed at the front and rear ends of the beam splitter body. The side of the semi-transparent and semi-reflective beam splitter (13) with the reflective film faces the first observation port (15), and the side of the semi-transparent and semi-reflective beam splitter (13) with the anti-reflective film faces the first LED circuit board (12).

3. The integrated ring light corner coaxial light source module according to claim 2, characterized in that, The semi-transparent and semi-reflective beam splitter (13) is tilted at (45)° inside the coaxial main seat (11).

4. The integrated ring light corner coaxial light source module according to claim 1, characterized in that, The coaxial main seat (11) is assembled from two side plates (111), a bottom plate (112), a cover plate (113), and a front plate (114). A first heat dissipation main seat (115) is fixed to the rear side of the bottom plate (112) and the cover plate (113). The first LED circuit board (12) is tightly fixed to the first heat dissipation main seat (115). The inner walls of the two side plates (111), the bottom plate (112), and the cover plate (113) are respectively provided with a first slot (1111), a second slot (1121), and a third slot (1131) for snapping the semi-transparent and semi-reflective beam splitter (13). The four edges of the semi-transparent and semi-reflective beam splitter (13) are respectively snapped into the first slot (1111), the second slot (1121), and the third slot (1131).

5. A corner coaxial light source module with integrated ring light according to claim 4, characterized in that, A buffer pad (4) is provided on the first card slot (1111), the second card slot (1121) and the third card slot (1131).

6. The corner coaxial light source module with integrated ring light according to claim 1, characterized in that, A first diffuser plate (16) is also provided between the semi-transparent and semi-reflective beam splitter (13) and the first LED circuit board (12), and the first diffuser plate (16) is snapped into the coaxial main seat (11).

7. A corner coaxial light source module with integrated ring light according to claim 1, characterized in that, The connector (2) is provided with an intensifying lens (5), which covers the second light-transmitting hole (21).

8. A corner coaxial light source module with integrated ring light according to claim 1, characterized in that, The ring light source bracket (31) includes an annular base (311) and an annular circumference (312) connected to each other. The annular base (311) is detachably connected to the connector (2). A first mounting cavity (3111) is formed on the inner wall of the annular base (311). A fourth snap-fit ​​groove (3112) is provided in the first mounting cavity (3111). A fifth snap-fit ​​groove (3121) is provided in the annular circumference (312). The second LED circuit board (33) is installed in the first mounting cavity (3111) and abuts against the fourth snap-fit ​​groove (3112) and the fifth snap-fit ​​groove (3121).

9. A corner coaxial light source module with integrated ring light according to claim 8, characterized in that, The second LED circuit board (33) has an overall ring-shaped horn structure.

10. A corner coaxial light source module with integrated ring light according to claim 8, characterized in that, The second diffuser plate (32) includes a fixed part (321), a light-transmitting part (322), and a light-transmitting wrapping part (323). The fixed part (321) is detachably connected to the annular circumference (312). A sixth snap-fit ​​groove (3113) is provided on the annular base (311). The light-transmitting wrapping part (323) abuts against the sixth snap-fit ​​groove (3113). The light-transmitting part (322) has a trumpet-shaped structure.

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