Lighting device and detection equipment

Abstract

The utility model discloses a lighting device and detection equipment, and the lighting device comprises a main body component which is provided with a through opening and a bearing part which is located at one end of the opening and extends towards the interior of the main body component, and the cross section of the bearing part is gradually reduced; the at least two light sources are configured on the bearing part and are located at different heights, and inspection light emitted by the at least two light sources is distributed in a step shape; according to the utility model, the problem that the detection precision of the detected object is reduced due to imaging blind spots on the surface of the detected object caused by difficulty in completely covering the concave surface or the convex surface of the surface of the detected object in a manner of parallelly irradiating the surface of the detected object by adopting an illuminating device can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic component detection equipment, and particularly relates to an illumination device and a detection device. Background Art

[0002] As a method for inspecting the appearance defects of inspected objects such as electronic chips, wafer capacitors, and resistors, generally, an illumination device parallel to the surface of the inspected object is used to illuminate the inspected object, and a photographing device is used to take pictures and videos of the inspected object. By analyzing the image information of the inspected object obtained by photographing, it is determined whether there are defects on the surface of the inspected object; however, due to the uneven surface of the inspected object, when the illumination device irradiates the surface of the inspected object in parallel, it is difficult for the light to completely cover the concave or convex surface of the inspected object, which results in imaging blind spots on the surface of the inspected object, and then causes a problem of decreased accuracy in the appearance detection of the inspected object. Summary of the Utility Model

[0003] The utility model aims to solve the above technical problems, that is, when the illumination device irradiates the surface of the inspected object in parallel, it is difficult to completely cover the concave or convex surface of the inspected object, resulting in imaging blind spots on the surface of the inspected object and causing a problem of decreased detection accuracy of the inspected object.

[0004] In a first aspect, the utility model provides an illumination device, comprising:

[0005] A main body member having a through opening and a bearing portion located at one end of the opening and extending towards the inside of the main body member with a gradually decreasing cross-section;

[0006] At least two light sources, at least two of the light sources being arranged on the bearing portion at different heights, and the inspection lights emitted by at least two of the light sources being distributed in a stepped manner.

[0007] In a preferred technical solution of the above illumination device, the bearing portion has a curved surface structure.

[0008] In a preferred technical solution of the above illumination device, there are two light sources, which can emit blue light and red light respectively.

[0009] In a preferred technical solution of the above illumination device, there are three light sources, which can emit blue light, red light or green light respectively.

[0010] In a preferred technical solution of the above illumination device, different light sources are arranged in sequence in the height direction and / or are arranged at intervals in the circumferential direction of the bearing portion.

[0011] In a preferred technical solution of the above illumination device, the light rays emitted by different light sources towards the bottom of the main body member are in a fan shape or a disk shape on a plane.

[0012] In the preferred technical solution of the above lighting device, the inclination angles of different types of the light sources relative to the opening axis direction on the bearing part are different.

[0013] In the preferred technical solution of the above lighting device, the light source is an LED lamp mounted on a circuit board.

[0014] In a second aspect, the present utility model further provides a detection device, including:

[0015] The above lighting device, configured to irradiate inspection light onto an object to be inspected;

[0016] An image capturing module, configured to capture an image of the object to be inspected through the opening of the main body member;

[0017] A judgment and processing module, capable of judging the quality information of the object to be inspected based on the image captured by the image capturing module.

[0018] In the preferred technical solution of the above detection device, the image capturing module at least includes a color capturing unit, and the color capturing unit is capable of capturing images of different colors of the inspection light emitted by the lighting device onto the object to be inspected, so as to form a color image;

[0019] The judgment and processing module at least includes a determination processing unit, and the determination processing unit is capable of decomposing the color image captured by the color capturing unit into different colors to determine the quality of the object to be inspected.

[0020] The beneficial effect of the present utility model is that in this application, the bearing part is arranged as a dome structure, and light sources of blue light, green light and red light are arranged on the bearing part at different heights, and inspection lights of high, medium and low angles are emitted towards the object to be inspected from different height directions, so that the blue light can irradiate the convex surface of the object to be inspected, and the red light can irradiate the concave surface of the object to be inspected, thereby reducing the problem of shadows or reflections generated on the surface of the object to be inspected due to single-angle irradiation, effectively improving the clarity of the image obtained by the imaging device, and improving the appearance detection accuracy of this application for the object to be inspected. Description of the Drawings

[0021] Figure 1 It is the front view of the first implementation manner of the main body member;

[0022] Figure 2 It is the cross-sectional view of the first implementation manner of the main body member;

[0023] Figure 3 It is the bottom view of the first implementation manner of the main body member;

[0024] Figure 4 It is the front view of the second implementation manner of the main body member;

[0025] Figure 5 Isometric view of the second embodiment of the main body member;

[0026] Figure 6 Is the bottom view of the second embodiment of the main body member. Specific embodiments

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] As Figures 1 to 6 shown, the lighting device of the present invention includes: a main body member 1 having a through opening 11 and a bearing portion 12 located at one end of the opening 11 and extending toward the inside of the main body member 1 with a gradually decreasing cross-section; at least two light sources 2, which are arranged on the bearing portion 12 at different heights, and the inspection lights emitted by the at least two light sources 2 are distributed in a stepped manner.

[0031] See Figure 1 、 Figure 2 , the main body member 1 is provided in a hollow manner, an opening 11 is vertically penetrated and arranged at the middle position of the main body member 1, a bearing portion 12 is formed at one end of the opening 11 of the main body member 1, and the bearing portion 12 gradually concaves inward from the bottom surface of the main body member 1 toward the inside of the main body member 1, so that the cross-section of the bearing portion 12 in the extending direction toward the inside of the main body member 1 gradually decreases. It should be noted that the end of the opening 11 is communicated with the bearing portion 12.

[0032] See Figure 2 、 Figure 5, the lighting device of the present application has at least two light sources 2 capable of emitting RGB wavelengths. Different light sources 2 are arranged in sequence along the height direction on the inclined surface of the bearing portion 12, so that different light sources 2 have different height positions, so that different light sources 2 can emit inspection light of RGB wavelengths from high, medium or low angular directions.

[0033] See Figure 2 , Figure 3 , when illuminating the object to be inspected, the side of the main body member 1 having the bearing portion 12 is aligned with the object to be inspected, so that the main body member 1 and the object to be inspected are relatively parallel. At least two light sources 2 distributed in a stepped manner on the surface of the bearing portion 12 can emit inspection light of RGB wavelengths from high, medium or low angles to the object to be inspected. The imaging device can capture an image of the object to be inspected when irradiated by the inspection light through the opening 11 of the main body member 1; it should be noted that, due to the uneven surface of the object to be inspected, the inspection light irradiated on the surface of the object to be inspected will undergo diffuse reflection and specular reflection. When the inspection light irradiates the surface of the object to be inspected from different height directions, it can provide more illumination angles and shadow information, which is convenient for highlighting the three-dimensional information of the surface of the object to be inspected, making the uneven parts of the surface of the object to be inspected more clearly visible, improving the clarity of the image captured by the imaging device, and making it easier to distinguish the quality of the object to be inspected, thereby improving the accuracy of the quality screening of the object to be inspected.

[0034] In addition, it should be noted that the detection of surface defects of the object to be inspected can also be achieved by the form of multiple light sources 2 emitting inspection light towards the object to be inspected along the same plane. However, in this method, due to the different wavelengths of RGB light, there will be different interactions of RGB light on the surface of the object to be inspected, which easily leads to stronger light reflection in some areas of the surface of the object to be inspected and weaker light reflection in other positions, resulting in overexposure or underexposure phenomena in some areas of the object to be inspected, affecting the clarity of the image obtained by the imaging device, and further affecting the accuracy of the surface defect screening of the object to be inspected. In the present application, inspection light of high, medium and low angles is emitted towards the object to be inspected from different height directions to reduce the problem of shadows or reflections on the surface of the object to be inspected caused by single-angle irradiation, and effectively improve the clarity of the image obtained by the imaging device.

[0035] In one or more embodiments, the bearing portion 12 has a curved surface structure.

[0036] See Figure 2 , Figure 3 , the bearing portion 12 has a continuous and smooth curved surface structure on the side close to the central axis of the opening 11. Through this setting, it is convenient for different light sources 2 to be evenly distributed on the surface of the bearing portion 12, thereby improving the uniformity of the RGB light emitted to the object to be inspected and ensuring the clarity of the image obtained by the imaging device.

[0037] In a specific embodiment, there are two types of light sources 2 , which can respectively emit blue light 21 and red light 22 .

[0038] See also Figure 4 、 Figure 5 When the light source 2 has two types, it is preferred to determine that the light emitting RGB wavelengths is blue light 21 and red light 22. The blue light 21 and the red light 22 have different wavelengths. Among them, the wavelength of the red light 22 is the longest and the wavelength of the blue light 21 is the shortest. This makes the red light 22 have a stronger penetrating ability and can irradiate into the concave surface of the surface of the object to be inspected. The blue light 21 has a weaker penetrating ability and is easily affected by the slight undulations on the surface of the object to be inspected and produces reflection or scattering. The blue light 21 is applied to the convex surface of the surface of the object to be inspected.

[0039] By configuring the light source 2 into two types, red light 22 and blue light 21, it can be effectively ensured that the red light 22 is irradiated on the concave surface of the surface of the object to be inspected, and the blue light 21 is irradiated on the convex surface of the surface of the object to be inspected. The red light 22 and the blue light 21 are distributed in a stepped manner on the supporting part 12 of the main component 1, so that the red light 22 and the blue light 21 irradiate the surface of the object to be inspected at different angles, so as to further make the uneven surface of the object to be inspected clear, thereby improving the accuracy of screening of the object to be inspected.

[0040] In a specific embodiment, there are three types of light sources 2 , which can respectively emit blue light 21 , red light 22 or green light 23 .

[0041] See also Figure 2 When the light source 2 has three types, the light emitted with RGB wavelengths is blue light 21, green light 23 and red light 22. The blue light 21, green light 23 and red light 22 have different wavelengths. Among them, the wavelengths of the blue light 21, green light 23 and red light 22 increase in sequence. The blue light 21 has weaker penetrating power and the red light 22 has stronger penetrating power.

[0042] By configuring the light source 2 into three types, namely blue light 21, green light 23 and red light 22, when the light emitted by the three light sources 2 is irradiated on the uneven surface of the object to be inspected, since the blue light 21, green light 23 and red light 22 have different wavelengths, the comprehensiveness of the light irradiation on the concave or convex surface of the object to be inspected can be further improved. At the same time, with the help of the three light sources 2 irradiating the surface of the object to be inspected at different heights and angles, more angles of illumination can be further provided to the surface of the object to be inspected, the shadow information on the surface of the object to be inspected can be reduced, and the three-dimensional information of the surface of the object to be inspected can be highlighted, making the concave and convex parts of the surface of the object to be inspected clearer, thereby improving the quality detection accuracy of the object to be inspected.

[0043] In one or more embodiments, different types of light sources 2 are arranged in sequence in the height direction on the bearing part 12 and / or are arranged at intervals in the circumferential direction of the bearing part 12.

[0044] See Figure 2 , Figure 5 , when there are two types of light sources 2, it is necessary to arrange the two types of light sources 2 at different heights. There is no limit to the heights of the two types of light sources 2 on the bearing part 12. It can be that the height of the first type of light source 2 is greater than the height of the second type of light source 2, or the height of the first type of light source 2 is less than the height of the second type of light source 2, which is specifically selected according to actual production needs.

[0045] See Figure 2 , when there are three types of light sources 2, the three types of light sources 2 can be arranged at different heights respectively, or two types of light sources 2 can be arranged at the same height and higher than or lower than the height of the other type of light source 2. The combination of the three types of light sources 2 is not limited and needs to be adjusted according to actual production conditions.

[0046] In one or more embodiments, the light rays emitted by different types of light sources 2 towards the bottom of the main body member 1 are fan-shaped or disc-shaped on a plane.

[0047] When the light rays emitted by the light source 2 on the bearing part 12 of the main body member 1 irradiate on a plane in a shape of a quarter disc, the main body member 1 can be configured into a quarter disc-shaped structure in the same way, or the main body member 1 can be configured into a disc structure, but the light source 2 is only installed in a quarter area of the bearing part 12.

[0048] See Figures 4 to 6 , when the light rays emitted by the light source 2 on the bearing part 12 of the main body member 1 irradiate on a plane in a shape of a half disc, the main body member 1 can also be configured into a half disc-shaped structure in the same way, or the main body member 1 can be configured into a disc structure, but the light source 2 is only installed in a half area of the bearing part 12.

[0049] See Figures 1 to 3 , when the light rays emitted by the light source 2 on the bearing part 12 of the main body member 1 irradiate on a plane in a complete disc shape, the cross-section of the main body member 1 can be a disc structure.

[0050] It should be noted that when the main body member 1 is configured as a quarter or a half disc structure, a baffle 3 can be installed on the side edge of the main body member 1, and the baffle 3 can extend to the bearing part 12; through this setting, the baffle 3 can block the light rays emitted by the light source 2 to avoid excessive divergence of the light rays. At the same time, the baffle 3 can be used as a connecting plate body with other devices, improving the installation convenience of the lighting device of the present application.

[0051] In one or more embodiments, the inclination angles of different types of light sources 2 relative to the axis direction of the opening 11 on the bearing portion 12 are different.

[0052] See Figure 4 , Figure 5 , when there are two light sources 2 and the emitted lights are blue light 21 and red light 22 respectively, the angle of the blue light 21 is deflected by 0 - 30° relative to the central axis of the opening 11, and the angle of the red light 22 is deflected by 50 - 90° relative to the central axis of the opening 11; in other possible embodiments, the angle of the blue light 21 can also be deflected by 50 - 90° relative to the central axis of the opening 11, and the angle of the red light 22 is deflected by 0 - 30° relative to the central axis of the opening 11. In this embodiment, the reason for the replacement of the angles of the blue light 21 and the red light 22 is that the positions of the light source 2 emitting the red light 22 and the light source 2 emitting the blue light 21 on the bearing portion 12 of the main body member 1 are replaced.

[0053] See Figure 2 , Figure 3 , when there are three light sources 2 and the emitted lights are blue light 21, green light 23 and red light 22 respectively, the angle of the blue light 21 is deflected by 0 - 30° relative to the central axis of the opening 11, the angle of the green light 23 is deflected by 50 - 90° relative to the central axis of the opening 11, and the angle of the red light 22 is deflected by 50 - 90° relative to the central axis of the opening 11; in other possible embodiments, the angle of the blue light 21 is deflected by 0 - 30° relative to the central axis of the opening 11, the angle of the green light 23 is deflected by 0 - 30° relative to the central axis of the opening 11, and the angle of the red light 22 is deflected by 50 - 90° relative to the central axis of the opening 11; or, the angle of the blue light 21 can also be deflected by 50 - 90° relative to the central axis of the opening 11, the angle of the green light 23 is deflected by 0 - 30° relative to the central axis of the opening 11, and the angle of the red light 22 is deflected by 0 - 30° relative to the central axis of the opening 11; or, the angle of the blue light 21 can also be deflected by 50 - 90° relative to the central axis of the opening 11, the angle of the green light 23 is deflected by 50 - 90° relative to the central axis of the opening 11, and the angle of the red light 22 is deflected by 0 - 30° relative to the central axis of the opening 11.

[0054] It should be noted that the reason for the change in the deflection angles of the blue light 21, the green light 23 and the red light 22 is that the positions of the three different light sources 2 on the bearing portion 12 of the main body member 1 are changed.

[0055] In one or more embodiments, the light source 2 is an LED lamp mounted on a circuit board. The circuit board is disposed inside the main body member 1 and is disposed on the bearing portion 12 on the side away from the central axis of the opening 11. The LED lamp is electrically connected to the circuit board, and the LED lamp extends to the bearing portion 12 on the side close to the central axis of the opening 11.

[0056] In addition, the present utility model further provides a detection device, comprising: the lighting device in any of the above embodiments, which is used to irradiate inspection light onto the object to be inspected; an image capturing module, which captures an image of the object to be inspected through the opening 11 of the main body member 1, and the image capturing module at least includes a color capturing unit, and the color capturing unit can capture images of the inspection light of different colors emitted by the lighting device onto the object to be inspected, so as to form a color image; a judgment and processing module, which can judge the quality information of the object to be inspected based on the image captured by the image capturing module, and the judgment and processing module at least includes a determination processing unit, and the determination processing unit can decompose the color image captured by the color capturing unit into different colors to determine the quality of the object to be inspected.

[0057] See Figure 2 , when the detection device detects the object to be inspected, first, the object to be inspected is conveyed through a glass disk, and at least two color light sources 2 of the lighting device bearing part 12 are used to irradiate the object to be inspected, and the color capturing unit captures the part of the object to be inspected irradiated by the light source 2 through the opening 11 of the main body member 1, and the determination processing unit is used to process and analyze the image captured by the color capturing unit, so as to obtain whether there are defects on the surface of the object to be inspected to inspect the quality of the object to be inspected.

[0058] The above embodiments are only used to illustrate the technical concept and features of the present utility model, and the purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it, and it cannot be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A lighting device, characterized in that, Comprising: A main body member having a through opening and a bearing portion with a gradually decreasing cross-section located at one end of the opening and extending towards the interior of the main body member; At least two light sources, at least two of the light sources being configured on the bearing portion and at different heights, and the inspection lights emitted by at least two of the light sources being distributed in a stepped manner.

2. The lighting device according to claim 1, characterized in that: The bearing portion has a curved surface structure.

3. The lighting device according to claim 1, characterized in that: There are two types of the light sources, which can emit blue light and red light respectively.

4. The lighting device according to claim 1, characterized in that: There are three types of the light sources, which can emit blue light, red light or green light respectively.

5. The lighting device according to claim 3 or 4, characterized in that: The different types of the light sources are sequentially arranged in the height direction and / or spaced in the circumferential direction of the bearing portion.

6. The lighting device according to claim 3 or 4, characterized in that: The lights emitted by the different types of the light sources towards the bottom of the main body member are in a fan shape or a disk shape on a plane.

7. The lighting device according to claim 3 or 4, characterized in that: The different types of the light sources have different inclination angles with respect to the axis direction of the opening on the bearing portion.

8. The lighting device according to claim 1, wherein: The light source is an LED lamp mounted on a circuit board.

9. A detection device, characterized in that, Comprising: The lighting device according to any one of claims 1-8 above, for irradiating an object to be inspected with inspection light; An image capturing module for capturing an image of the object to be inspected through the opening of the main body member; A judgment processing module capable of judging the quality information of the object to be inspected based on the image captured by the image capturing module.

10. The detection device according to claim 9, wherein: The image capturing module at least includes a color capturing unit, and the color capturing unit can capture images of the inspection lights of different colors emitted by the lighting device towards the object to be inspected, so as to form a color image; The judgment processing module at least includes a determination processing unit, and the determination processing unit can decompose the color image captured by the color capturing unit into different colors to determine the quality of the object to be inspected.

Images