Coaxial light and double-tunnel light combined light source
By combining coaxial light and dual-tunnel light in the light source design, the problem of detection efficiency and quality of traditional light sources when inspecting highly reflective surfaces and complex workpieces is solved, achieving efficient and comprehensive detection results.
Patent Information
- Application Number
- CN202520685325.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-12
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-12
AI Technical Summary
Traditional coaxial light sources are prone to specular reflection when inspecting highly reflective surfaces, resulting in the loss of key feature information. Furthermore, a single tunnel light source is difficult to simultaneously capture the multidirectional defects of complex workpieces, affecting inspection efficiency and quality.
By employing a combination of coaxial light and dual-tunnel light sources, and through the design of a beam splitter prism and a diffuse reflector, specular reflection suppression and diffuse reflection enhancement are achieved, providing vertical illumination and multi-angle supplementary lighting effects, thereby improving detection efficiency and quality.
It enables the completion of traditional multi-station inspection processes with a single imaging, improving inspection speed and quality, and simultaneously acquiring multi-directional defects in complex workpieces.
Smart Images
Figure CN223869062U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of detecting light source, especially to a coaxial light and double-tunnel light combined light source. BACKGROUND
[0002] In the field of machine vision, when detecting the appearance of a product, a light source is usually used for irradiation. Common light sources include coaxial light sources and tunnel light sources.
[0003] Although the traditional coaxial light source can provide uniform illumination in the vertical direction, it is prone to strong mirror reflection when detecting a product with a high-reflective surface, such as metal or mirror glass, resulting in the loss of key feature information and affecting the detection quality. A single tunnel light source is limited by a fixed incident angle, such as an incident angle of 30° to 60°, making it difficult to simultaneously capture multidirectional defects of complex workpieces, such as sidewall scratches and chamfer edge collapse. Therefore, multiple light source positions need to be changed for supplementary lighting, affecting the detection efficiency and making it difficult to meet the detection requirements. SUMMARY
[0004] The utility model aims at overcoming the above-mentioned defects in the prior art and providing a coaxial light and double-tunnel light combined light source to meet the detection efficiency and detection quality of the detected product.
[0005] To achieve the above-mentioned purpose, the utility model provides a coaxial light and double-tunnel light combined light source, which comprises a seat body, the seat body is hollow inside and has a light source channel passing through; the light source channel extends to the outer wall of the seat body and forms a light outlet; a first light source assembly comprises a light splitting prism and a coaxial light source; the light splitting prism is located in the light source channel and is spaced apart from the light outlet; the coaxial light source is arranged on one side of the light splitting prism and can irradiate light to the light splitting prism to reflect to the light outlet; a second light source assembly is arranged in the seat body; the second light source assembly comprises a diffuse reflection plate and a tunnel light source; the diffuse reflection plate is arranged towards the light outlet, and the tunnel light source is arranged on one side of the diffuse reflection plate and can irradiate light to the diffuse reflection plate to reflect to the light outlet; the diffuse reflection plates of multiple second light source assemblies have an included angle between the directions towards the light outlet.
[0006] Further, the second light source assembly is provided with two, and the diffuse reflection plates of the two second light source assemblies are symmetrically arranged and spaced apart.
[0007] Further, the first light source assembly further comprises a shell, which is arranged in the seat body; the light splitting prism and the coaxial light source part are arranged in the shell; a communication channel is arranged in the middle of the shell, and the two ends of the communication channel extend to the outer wall of the shell and form a first opening and a second opening respectively, the through direction of the communication channel is arranged in the same direction as the through direction of the light source channel, and the communication channel and the light source channel are at least partially arranged in the same position; the light splitting prism is located between the first opening and the second opening; one end of the diffuse reflection plate close to the shell abuts against the shell.
[0008] Further, the side end of the diffuse reflection plate abuts against the inner wall of the seat body.
[0009] Further, the diffuse reflection plate is concave in the direction away from the light outlet.
[0010] Further, the control assembly is further arranged, and the control assembly is connected with the seat body; the control assembly is provided with three, and is electrically connected with the coaxial light source part of the first light source assembly and the tunnel light source part of the two second light source assemblies one by one.
[0011] Further, the light splitting prism is a half-mirror.
[0012] Further, the first light source assembly further comprises a diffuse reflection plate; the diffuse reflection plate is arranged between the light splitting prism and the coaxial light source part.
[0013] Further, the first light source assembly further comprises an anti-reflection lens; the anti-reflection lens is arranged in the light source channel and is arranged on the side of the light splitting prism away from the light outlet.
[0014] Further, the tunnel light source part further comprises a tunnel light structure, a water-cooled plate, a water inlet pipe and a water outlet pipe; the tunnel light structure is used for emitting light; the tunnel light structure abuts against the outer surface of the water-cooled plate; the water-cooled plate is hollow inside and is arranged in communication with the water inlet pipe and the water outlet pipe.
[0015] Compared with the prior art, the utility model has the following advantages:
[0016] The light splitting prism is located in the light source channel and is spaced apart from the light outlet, after the coaxial light source member irradiates light on the light splitting prism, the light splitting prism can reflect the light to the light outlet and emit out to provide the light source, the diffuse reflection plate is arranged towards the light outlet, after the tunnel light source member irradiates light on the diffuse reflection plate, the diffuse reflection plate can reflect the light to the light outlet and emit out to provide the light source, the diffuse reflection plates of the plurality of second light source assemblies have an included angle between the directions towards the light outlet, so that the effect of light supplement can be achieved, and through the synergistic effect of the first light source assembly and the plurality of second light source assemblies, the effects of mirror reflection suppression and diffuse reflection enhancement can be achieved, so that the detection efficiency and detection quality are improved, and the detection requirement is met. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical in the embodiments of the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 It is a structure schematic view of a coaxial light and double-tunnel light combined light source of the present application.
[0019] Figure 2 It is a sectional view of a coaxial light and double-tunnel light combined light source of the present application.
[0020] Figure 3 It is another view structure schematic view of a coaxial light and double-tunnel light combined light source of the present application.
[0021] Figure 4 It is a structure schematic view of a first light source assembly of a coaxial light and double-tunnel light combined light source of the present application.
[0022] Figure 5 It is a structure schematic view of a coaxial light and double-tunnel light combined light source of the present application. Figure 4 It is another view structure schematic view of a coaxial light and double-tunnel light combined light source of the present application.
[0023] Reference signs:
[0024] The first light source assembly 100, the light splitting prism 110, the coaxial light source member 120, the shell 130, the first opening 131, the second opening 132, the diffuse reflection plate 140, the anti-reflection lens 150, the aviation power outlet 160, the second light source assembly 200, the diffuse reflection plate 210, the tunnel light source member 220, the tunnel light structure 221, the water cooling plate 222, the water inlet pipe 223, the water outlet pipe 224, the seat body 300, the light source channel 301, and the light outlet 302. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are merely some embodiments of the utility model, rather than all the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are merely used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as described in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0027] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are merely for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.
[0028] Please refer to Figures 1 to 5 The embodiments of the utility model provide a coaxial light and double-tunnel light combined light source, which comprises a seat body 300, a first light source assembly 100 and a second light source assembly 200.
[0029] The seat body 300 is internally hollow and is provided with a light source channel 301 extending therethrough; the light source channel 301 extends to the outer wall of the seat body 300 and forms a light outlet 302; the first light source assembly 100 comprises a light splitting prism 110 and a coaxial light source 120; the light splitting prism 110 is located in the light source channel 301 and is spaced apart from the light outlet 302; the coaxial light source 120 is arranged on one side of the light splitting prism 110 and can irradiate light on the light splitting prism 110 to reflect to the light outlet 302; the second light source assembly 200 is arranged in the seat body 300; the second light source assembly 200 comprises a diffuse reflection plate 210 and a tunnel light source 220; the diffuse reflection plate 210 is arranged towards the light outlet 302, the tunnel light source 220 is arranged on one side of the diffuse reflection plate 210, and can irradiate light on the diffuse reflection plate 210 to reflect to the light outlet 302; the diffuse reflection plates 210 of the plurality of second light source assemblies 200 have an included angle between the directions towards the light outlet 302.
[0030] The beam splitter 110 is located within the light source channel 301 and is spaced apart from the light outlet 302. After the coaxial light source 120 illuminates the beam splitter 110, the beam splitter 110 reflects the light to the light outlet 302 and emits it to provide a light source. The diffuse reflector 210 is positioned towards the light outlet 302. After the tunnel light source 220 illuminates the diffuse reflector 210, the diffuse reflector 210 reflects the light to the light outlet 302 and emits it to provide a light source. The diffuse reflectors 210 of the multiple second light source components 200 have an angle between their directions towards the light outlet 302 to provide supplementary lighting. Furthermore, through the synergistic effect of the first light source component 100 and the multiple second light source components 200, the effects of specular reflection suppression and diffuse reflection enhancement can be achieved to improve detection efficiency and detection quality and meet detection requirements.
[0031] Specifically, by using the vertical light emitted by the first light source component 100 and the diffused light from the second light source component 200, the traditional multi-station detection process can be completed in a single imaging, thereby improving the detection speed.
[0032] Reference Figure 2 and Figure 3 In some embodiments of this utility model, two second light source components 200 are provided, and the diffuse reflection plates 210 of the two second light source components 200 are symmetrically arranged and spaced apart.
[0033] The second light source assembly 200 reflects light through the diffuser plate 210, so that the light emitted by the tunnel light source 220 can be emitted from the light-emitting port to provide a light source; the diffuser plates 210 of the two second light source assemblies 200 are symmetrically arranged so that the two second light source assemblies 200 can illuminate light from different directions on both sides to ensure the supplementary lighting effect.
[0034] Specifically, the diffuse reflector plates 210 of the two second light source components 200 are symmetrical with respect to the light source channel 301 and are equidistant from the central axis of the light source channel 301 to further ensure the supplementary lighting effect and improve the detection quality; the two diffuse reflector plates 210 are spaced apart so that both diffuse reflector plates 210 are located outside the light source channel 301 to avoid the diffuse reflector plates 210 blocking the light source channel 301, thereby further improving the detection quality.
[0035] Specifically, the two second light source components 200 are symmetrically arranged relative to the light source channel 301 to further ensure the supplementary lighting effect.
[0036] Specifically, the incident angle of the two tunnel lights is 40° to 50°; the diffused light emitted by the two second light source components 200 can realize X / Y axis stereo imaging and simultaneously acquire step features with a height difference greater than 0.1mm.
[0037] ReferenceFigure 2 , Figure 4 and Figure 5 In some embodiments of this utility model, the first light source assembly 100 further includes a housing 130, which is disposed within the base 300; the beam splitter 110 and the coaxial light source component 120 are both disposed within the housing 130; a through channel is provided in the middle of the housing 130, and the two ends of the through channel extend to the outer wall of the housing 130, forming a first opening 131 and a second opening 132 respectively. The through direction of the through channel is the same as the through direction of the light source channel 301, and the through channel and the light source channel 301 at least partially overlap; the beam splitter 110 is located between the first opening 131 and the second opening 132; the diffuse reflector 210 abuts against the housing 130 at one end near the housing 130.
[0038] The housing 130 can protect the beam splitter 110 and block the light transmitted from the beam splitter 110, reducing interference with the detection.
[0039] The housing 130 is provided with a connecting channel, the two ends of which extend to the opposite outer side walls of the housing 130 to form a first opening 131 and a second opening 132. The first opening 131 is located on the side of the housing 130 closer to the light outlet 302, and the second opening 132 is located on the side of the housing 130 farther from the light outlet 302. A beam splitter 110 is located between the first opening 131 and the second opening 132. A coaxial light source enters from the beam splitter 110 and, under the reflection of the beam splitter 110, the light is emitted from the first opening 131 and then from the light outlet 302. The light reflected from the product under test enters the base 300 from the light outlet 302 and passes through the first opening 131, the beam splitter 110, and the second opening 132 in sequence, and is emitted from the second opening 132.
[0040] The diffuse reflector 210 abuts against the housing 130 at one end, which reduces the amount of light transmitted between the diffuse reflector 210 and the housing 130, ensuring the concentration of light and improving the detection quality.
[0041] Specifically, the base 300 has a shooting position and a placement position on opposite sides. The shooting position is located near the second opening 132, and the placement position is located near the light outlet 302. The shooting position is used to place the CCD inspection camera module, and the placement position is used to place the product to be tested.
[0042] Specifically, the housing 130 is fixedly connected to the base 300, and is also connected to the beam splitter 110 and the coaxial light source 120, so that the base 300 is relatively fixed to the beam splitter 110 and the coaxial light source 120, thereby improving the stability during detection.
[0043] Specifically, the coaxial light source 120 can be powered by an aviation power supply line 160, with a single string current of up to 1A. A water-cooling module is used for cooling to ensure the stability of the coaxial light source 120. The coaxial light source 120 can be a coaxial PCBA.
[0044] Reference Figure 2 and Figure 3 In some embodiments of this utility model, the side end of the diffuse reflector 210 abuts against the inner wall of the base 300 to reduce the light transmitted between the diffuse reflector 210 and the base 300 and ensure the concentration of light.
[0045] Specifically, the seat 300 is hollow inside, and the diffuse reflector 210 is located inside the seat 300. The two ends of the diffuse reflector 210 abut against the two inner walls of the seat 300 respectively, thereby blocking light from passing through the space between the diffuse reflector 210 and the seat 300.
[0046] Reference Figure 2 In some embodiments of this utility model, the diffuse reflector 210 is recessed in the direction away from the light outlet 302 to ensure the diffusion effect; wherein, the diffuse reflector 210 is arc-shaped and the reflective surface of the diffuse reflector 210 faces the light outlet 302.
[0047] Specifically, the length direction of the diffuse reflector 210 is perpendicular to the through direction of the light source channel 301 to ensure the consistency of the emission angle of the reflected light; the length directions of the diffuse reflectors 210 of the two second light source components 200 are arranged in the same direction.
[0048] In some embodiments of this utility model, a control component is also included, which is connected to the base 300; three control components are provided, and are electrically connected to the coaxial light source 120 of the first light source component 100 and the tunnel light source 220 of the two second light source components 200, respectively.
[0049] The control component can control the brightness of the light emitted by the coaxial light source 120 and the tunnel light source 220. The brightness can be individually controlled in levels, adjustable between level 0 and level 255, improving operability.
[0050] The three control components allow for individual control and adjustment of the coaxial light source 120 and the two tunnel light sources 220, enabling the adjustment of the light emitted from the light outlet 302 as needed, thus further improving operability.
[0051] In some embodiments of this utility model, the beam splitter 110 is a semi-transparent and semi-reflective mirror.
[0052] The beam splitter 110 has a cuboid structure and a semi-transparent and semi-reflective surface. The semi-transparent and semi-reflective surface is located at the diagonal corner of the cuboid structure, and the splitting ratio of the semi-transparent and semi-reflective surface is 50%:50%. The plane containing the semi-transparent and semi-reflective surface forms an angle of 45° with the extension direction of the light source channel 301. The light path direction of the light emitted from the coaxial light source is perpendicular to the through direction of the light source channel 301, so that the light path direction of the light reflected by the beam splitter 110 from the coaxial light source is parallel to the through direction of the light source channel 301, thereby achieving vertical illumination for the test.
[0053] Of course, depending on the specific circumstances, the beam splitting ratio of the beam splitter 110 can also be other ratios.
[0054] Reference Figure 2 In some embodiments of this utility model, the first light source assembly 100 further includes a diffuser plate 140; the diffuser plate 140 is disposed between the beam splitter prism 110 and the coaxial light source 120, so as to improve the uniformity of light entering the beam splitter prism 110 from the coaxial light source 120 and suppress specular reflection.
[0055] Specifically, the diffuser plate 140 is fixedly connected to the housing 130 and is arranged parallel to the light-emitting surface of the coaxial light source 120 to further improve the uniformity of light.
[0056] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the first light source assembly 100 further includes an intensifying lens 150; the intensifying lens 150 is located in the light source channel 301 and is disposed on the side of the beam splitter 110 away from the light outlet 302.
[0057] Specifically, the intensifying lens 150 is disposed at the second opening 132. By disposing of the intensifying lens 150, the degree of reflection of the light emitted from the beam splitter 110 can be reduced, thereby improving the imaging quality of the camera module.
[0058] Reference Figure 2 and Figure 3 In some embodiments of this utility model, the tunnel light source 220 further includes a tunnel light structure 221, a water-cooled plate 222, a water inlet pipe 223, and a water outlet pipe 224; the tunnel light structure 221 is used to emit light; the tunnel light structure 221 abuts against the outside of the water-cooled plate 222; the water-cooled plate 222 is hollow inside and is connected to the water inlet pipe 223 and the water outlet pipe 224.
[0059] Cold water can enter the water-cooled plate 222 through the inlet pipe 223 and accumulate inside the water-cooled plate 222. The tunnel light structure 221 comes into contact with the outside of the water-cooled plate 222 so that the water-cooled plate 222 can cool the tunnel light structure 221. The cold water inside the water-cooled plate 222 can be discharged from the outlet pipe 224 so that the cold water circulates inside the water-cooled plate 222 to ensure the cooling effect.
[0060] Among them, the tunnel optical structure 221 can be a tunnel optical PCBA.
[0061] Specifically, one end of the diffuse reflector 210 is connected to the water-cooled plate 222, and the other end of the diffuse reflector 210 abuts against the housing 130. When the tunnel light structure 221 irradiates the diffuse reflector 210, causing the diffuse reflector 210 to heat up, the diffuse reflector 210 can be cooled by the part connected to the water-cooled plate 222, reducing the damage caused by high temperature.
[0062] 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 combined light source of coaxial light and dual-tunneling light, characterized in that, include: The base (300) is hollow inside and has a through-type light source channel (301); the light source channel (301) extends to the outer wall of the base (300) and forms a light outlet (302); The first light source assembly (100) includes a beam splitter (110) and a coaxial light source component (120); the beam splitter (110) is located in the light source channel (301) and is spaced apart from the light outlet (302); the coaxial light source component (120) is disposed on one side of the beam splitter (110) and is capable of illuminating the beam splitter (110) and reflecting light to the light outlet (302); Multiple second light source assemblies (200) are provided and are all disposed within the base (300); the second light source assembly (200) includes a diffuse reflector (210) and a tunnel light source (220); the diffuse reflector (210) is disposed facing the light outlet (302), and the tunnel light source (220) is disposed on one side of the diffuse reflector (210) and is capable of illuminating the diffuse reflector (210) to reflect light to the light outlet (302); the diffuse reflectors (210) of the multiple second light source assemblies (200) have an included angle with each other in the direction facing the light outlet (302).
2. The combined coaxial light and dual-tunneling light source according to claim 1, characterized in that, There are two second light source components (200), and the diffuse reflective plates (210) of the two second light source components (200) are symmetrically arranged and spaced apart.
3. The combined coaxial light and dual-tunneling light source according to claim 1, characterized in that, The first light source assembly (100) further includes a housing (130), which is disposed within the base (300); the beam splitter (110) and the coaxial light source (120) are both disposed within the housing (130); a through channel is provided in the middle of the housing (130), and both ends of the through channel extend to the outer wall of the housing (130) and form a first opening (131) and a second opening (132) respectively. The through direction of the through channel is the same as the through direction of the light source channel (301), and the through channel and the light source channel (301) at least partially overlap; the beam splitter (110) is located between the first opening (131) and the second opening (132); the diffuse reflector (210) abuts against the housing (130) at one end near the housing (130).
4. The combined coaxial light and dual-tunneling light source according to claim 1, characterized in that, The side end of the diffuse reflector (210) abuts against the inner wall of the base (300).
5. The combined light source of coaxial light and double tunneling light according to any one of claims 1 to 4, characterized in that, The diffuse reflector (210) is recessed in a direction away from the light outlet (302).
6. The combined light source of coaxial light and dual-tunneling light according to claim 2, characterized in that, It also includes a control component, which is connected to the base (300); there are three control components, which are electrically connected to the coaxial light source element (120) of the first light source component (100) and the tunnel light source element (220) of the two second light source components (200), respectively.
7. The combined coaxial light and dual-tunneling light source according to claim 1, characterized in that, The beam splitter prism (110) is a semi-transparent and semi-reflective mirror.
8. The combined coaxial light and dual-tunneling light source according to claim 1, characterized in that, The first light source assembly (100) further includes a diffuser plate (140); the diffuser plate (140) is disposed between the beam splitter (110) and the coaxial light source (120).
9. The combined light source of coaxial light and double tunneling light according to claim 1, characterized in that, The first light source assembly (100) further includes an intensifying lens (150); the intensifying lens (150) is located within the light source channel (301) and is disposed on the side of the beam splitter (110) away from the light outlet (302).
10. The combined light source of coaxial light and dual-tunneling light according to claim 1, characterized in that, The tunnel light source (220) also includes a tunnel light structure (221), a water-cooled plate (222), a water inlet pipe (223), and a water outlet pipe (224); the tunnel light structure (221) is used to emit light; the tunnel light structure (221) abuts against the outside of the water-cooled plate (222); the water-cooled plate (222) is hollow inside and is connected to the water inlet pipe (223) and the water outlet pipe (224).