Combination light source and detection device

Abstract

This application relates to a combined light source and a detection device. The combined light source includes a housing and a light source assembly. The housing has a concave mounting surface that extends circumferentially around a reference axis. The light source assembly includes light-emitting elements and control elements. Multiple light-emitting elements are arranged in layers along the reference axis on the mounting surface, with each layer's light-emitting elements arranged circumferentially around the reference axis, and each light-emitting element facing the illumination area. Multiple control elements are present, each connected to at least one light-emitting element to control the corresponding connected element's illumination and extinguishing. Multiple control elements can control light-emitting elements at different circumferential positions and different light emission angles in any combination to form different lighting patterns and provide different lighting effects. This provides high versatility and occupies less space compared to traditional multi-light source combinations. The detection device includes the aforementioned combined light source and has high detection versatility.

Description

Technical Field

[0001] This application relates to the field of light source technology, and in particular to a combined light source and detection device. Background Technology

[0002] As products in the industrial manufacturing sector gradually develop towards miniaturization, integration, and precision, traditional, single testing methods are no longer sufficient to meet the testing needs of these products.

[0003] Current testing equipment typically uses multiple different light sources to illuminate the product, providing different lighting effects, highlighting different defects that may exist in the product, and achieving multiple inspections.

[0004] However, in current testing devices, each light source needs to be configured and combined specifically for a particular product, lacking universality, and multiple light sources require a large amount of space. Utility Model Content

[0005] Therefore, it is necessary to provide a combined light source and detection device to address the above problems.

[0006] This application provides a combined light source, which includes a housing and a light source assembly. The housing has a concave mounting surface that extends circumferentially around a reference axis. The light source assembly includes light-emitting elements and control elements. Multiple light-emitting elements are arranged in layers along the reference axis on the mounting surface. Multiple light-emitting elements in the same layer are arranged circumferentially around the reference axis, and each light-emitting element faces the illumination area. There are multiple control elements, and each control element is connected to at least one light-emitting element to control the corresponding connected light-emitting element to light up and turn off.

[0007] In one embodiment, the control element and at least one of the light-emitting elements connected to the control element are the same lighting unit.

[0008] In one embodiment, the wavelengths of the light emitted by the light-emitting elements of different lighting units are different.

[0009] In one embodiment, the light-emitting elements of different lighting units have different sizes.

[0010] In one embodiment, the light-emitting elements of different lighting units have different brightness.

[0011] In one embodiment, the housing includes a top surface that is disposed opposite to the mounting surface, and the cross-sectional perimeter of the portions of the plurality of light-emitting elements on different layers of the mounting surface gradually increases in a direction away from the top surface along the reference axis.

[0012] In one embodiment, the light-emitting elements in the same layer are at the same distance from the reference axis to the illumination area.

[0013] In one embodiment, the emission direction of the light-emitting element in the same layer is at the same angle to the reference axis.

[0014] In one embodiment, the number of lighting units in the plurality of light-emitting elements on the same layer is K, where K≥2.

[0015] In one embodiment, the angle between the emission direction of the light-emitting element and the reference axis is between 0° and 85°.

[0016] In one embodiment, the plurality of light-emitting elements are configured as plug-in and / or patch type.

[0017] In one embodiment, the housing has a shooting window along the reference axis, the housing includes a top shell and a light guide plate, the mounting surface is disposed on the top shell, and the light guide plate is disposed on the top shell and covers the plurality of light-emitting elements.

[0018] This application also provides a detection device, which includes a detector and a combined light source as described above.

[0019] In the aforementioned combined light source, each light-emitting element faces the illumination area. Since multiple light-emitting elements are arranged in layers along a reference axis on the mounting surface, the light-emitting elements in different layers have different height positions relative to the illumination area. It is easy to understand that when the height positions of the light-emitting elements in each layer are different, and they all face the illumination area, the emission direction of each layer of light-emitting elements when providing illumination is also different, meaning that each layer of light-emitting elements can provide illumination at different angles. Furthermore, multiple light-emitting elements in the same layer are arranged in a circumferential direction around the reference axis, thus placing them in different circumferential positions. Therefore, multiple light-emitting elements can also provide illumination from different circumferential positions, providing targeted illumination to different areas of the workpiece's circumference. In this application, a control element is connected to at least one light-emitting element to control the corresponding connected light-emitting element to light up and turn off. Moreover, there are multiple control elements, which can control light-emitting elements at different circumferential positions and with different emission angles to light up and turn off accordingly, combining to form different lighting methods and provide different lighting effects. In this application, the combined light source can be matched with light-emitting elements at different circumferential positions and different light emission angles according to the lighting requirements of the workpiece, so as to meet the lighting requirements and has high versatility. Moreover, compared with the independent configuration and combination of multiple light sources in traditional technology, the single combined light source in this application can provide various lighting effects, and its space occupation is relatively smaller. Attached Figure Description

[0020] Figure 1This is an isometric schematic diagram of a detection device provided in an embodiment of this application.

[0021] Figure 2 for Figure 1 A cantilevered schematic diagram of the combined light source hidden behind the light guide plate in the detection device shown.

[0022] Figure 3 for Figure 2 The side view of the combined light source shown.

[0023] Figure 4 for Figure 3 The combined light source shown is a cross-sectional view along line AA.

[0024] Figure 5 for Figure 2 The bottom view of the light-emitting components and control components in the same layer of the combined light source shown.

[0025] Figure 6 for Figure 5 The diagram shows an isometric view of the light-emitting components and control components on the same layer.

[0026] Figure 7 for Figure 2 The bottom view of the combined light source shown.

[0027] Reference numerals: 10, Detection device; 11, Detector; 12, Combined light source; 20, Illumination area; 100, Housing; 110, Top housing; 111, Mounting surface; 112, Top surface; 113, Imaging window; 120, Light guide plate; 200, Light source assembly; 201, Illumination unit; 210, Light-emitting element; 220, Control element; 231, First layer; 232, Second layer; 233, Third layer; 234, Fourth layer; 235, Fifth layer; 236, Sixth layer; 237, Seventh layer; 300, Illumination zone; O, Reference axis; S, Emission direction; α, Angular span; β, Included angle. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figure 1 , Figure 1 This illustration shows an isometric view of a detection device according to an embodiment of the present application. The embodiment provides a detection device 10, which includes a detector 11 and a combined light source 12. The combined light source 12 illuminates an area 20 (e.g., ...). Figure 4 (As shown) Lighting is applied to highlight potential defects in the workpiece at the illuminated area 20. Detector 11 is used to capture images of the workpiece at the illuminated area 20 for defect detection.

[0035] Combination Figure 4 and Figure 5 Furthermore, the combined light source 12 has multiple lighting zones 300, each of which can provide illumination independently. For each lighting zone 300, any one or more of the following factors may differ: distribution position, illumination angle, wavelength of the emitted beam, brightness of the emitted beam, and luminous range of the emitted beam. Therefore, by combining the various lighting zones 300, different lighting effects can be provided to the workpiece in the lighting area 20.

[0036] Please see Figures 2 to 4 This application provides a combined light source 12, which includes a housing 100 and a light source assembly 200. The light source assembly 200 is disposed in the housing 100 and is used to provide illumination to the lighting area 20.

[0037] The housing 100 has a concave mounting surface 111, which extends circumferentially around the reference axis O. The light source assembly 200 includes a light-emitting element 210 and a control element 220, which controls the lighting and extinguishing of the light-emitting element 210. There are multiple light-emitting elements 210, each facing the illumination area 20. The multiple light-emitting elements 210 are arranged in layers along the reference axis O on the mounting surface 111. Therefore, the light-emitting elements 210 in different layers have different height positions relative to the illumination area 20. It is easy to understand that when the height positions of the light-emitting elements 210 in each layer are different, and they all face the illumination area 20, the emission direction S (e.g., ...) of each layer of light-emitting elements 210 when providing illumination... Figure 6As shown, the light-emitting elements 210 of each layer are also different, that is, each layer of light-emitting element 210 can provide illumination at different angles.

[0038] Furthermore, the multiple light-emitting elements 210 in the same layer are arranged in the circumferential direction around the reference axis O, so the multiple light-emitting elements 210 in the same layer are in different circumferential positions. Thus, the multiple light-emitting elements 210 can also provide illumination from different circumferential positions, providing targeted illumination for different areas of the workpiece in the circumferential direction.

[0039] There are multiple control elements 220, each connected to at least one light-emitting element 210 to control the corresponding light-emitting element 210 to light up and turn off. Thus, multiple control elements 220 can control light-emitting elements 210 at different circumferential positions and different light emission angles to light up and turn off accordingly, forming different lighting modes and providing different lighting effects. In this application, the combined light source 12 can be matched with light-emitting elements 210 at different circumferential positions and different light emission angles according to the lighting requirements of the workpiece, thus meeting the lighting needs and exhibiting high versatility. Furthermore, compared to the independent configuration and combination of multiple light sources in traditional technologies, the single combined light source 12 in this application can provide various lighting effects, and its space occupation is relatively smaller.

[0040] It is understood that the control element 220 and at least one light-emitting element 210 connected to the control element 220 are referred to as the same lighting unit 201, and each different lighting unit 201 is independently lit and independently turned off. For example... Figure 5 One lighting unit 201 may correspond to one lighting zone 300 as described above.

[0041] As one example, multiple lighting units 201 located on the same layer are lit up simultaneously, or a limited number of multi-layer lighting units 201 are lit up simultaneously, so that each light-emitting element 210 in the circumferential direction lights up at the same time, forming a ring-shaped light illumination.

[0042] As one example, multiple lighting units 201 located in a certain area around the reference axis O can be lit simultaneously to provide targeted lighting for the corresponding area on the workpiece.

[0043] like Figure 2 As one example, since multiple light-emitting elements 210 are all located on the recessed mounting surface 111, dome lighting can be formed when all lighting units 201 (or at least most lighting units 201) are lit at the same time.

[0044] It should be noted that each lighting unit 201 can be configured to have the same number of light-emitting elements 210, and each lighting unit 201 can be configured to have the same circumferential angular span α. Please refer to [link / reference]. Figure 5As one example, the lighting unit 201 may have an angular span α of 90°, that is, multiple light-emitting elements 210 on the same layer are divided into 4 lighting units 201, and the circumferential angular span α of each lighting unit 201 is 90°. However, it should be emphasized that this application is not limited to this, and the number of light-emitting elements 210 and the circumferential angular span α of each lighting unit 201 can be configured according to actual needs.

[0045] Please see Figure 6 Combined Figure 4 In one embodiment, the angle β between the emission direction S of the light-emitting element 210 and the reference axis O is between 0° and 85°, i.e., 0°≤α≤85°. Further, the angle β between the emission direction S of the light-emitting element 210 and the reference axis O can be 0°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, and 85°, etc. It is easily understood that when the workpiece to be tested has a slotted structure or an irregular surface, illumination from a single angle is insufficient and it is difficult to adequately illuminate the surface of the workpiece to be tested. In this embodiment, each light-emitting element 210 has a different beam emission angle, which can meet the lighting requirements of workpieces with complex shapes. It is understood that the light-emitting elements 210 of the same lighting unit 201 can be configured to have the same beam emission angle, and lighting units 201 in different layers can have different beam emission angles, which can meet the lighting requirements of workpieces with complex shapes.

[0046] Please see Figure 4 In one embodiment, the light-emitting elements 210 on the same layer are at the same distance from the reference axis O to the illumination area 20. That is, the light-emitting elements 210 on the same layer have the same height position, which makes the distribution of the light-emitting elements 210 and the illumination units 201 formed by the light-emitting elements 210 more regular, making it easier to determine the position of the illumination units 201 and facilitating flexible configuration of different combinations of illumination units 201 for lighting.

[0047] Alternatively, the distribution rings formed by the various light-emitting elements 210 in the same layer can be configured to be tilted relative to the reference axis O, that is, the multiple layers of light-emitting elements 210 can be tilted and layered. In this case, the distances from the light-emitting elements 210 in the same layer to the illumination area 20 are different.

[0048] like Figure 5 and Figure 6 Furthermore, the distribution rings of each layer of light-emitting elements 210 can be standard circular rings. Alternatively, the distribution rings of each layer of light-emitting elements 210 can be elliptical or other irregular ring structures.

[0049] Please refer to it again. Figure 2The light-emitting elements 210 in each layer can be arranged at uniform intervals. Alternatively, in some layers, the intervals between some adjacent light-emitting elements 210 can be different from the intervals between other light-emitting elements 210. For example, the intervals between light-emitting elements 21 belonging to different lighting units 201 can be configured to be larger to reserve some space for external communication and to achieve functions such as heat dissipation.

[0050] Please see Figure 4 Combined Figure 2 The housing 100 includes a top surface 112, which is disposed opposite to the mounting surface 111, and the detector 11 is located on the side where the top surface 112 is located. Along the reference axis O away from the top surface 112, the cross-sectional perimeter of the multiple light-emitting elements 210 in different layers on the mounting surface 111 gradually increases, meaning the mounting surface 111 is constructed to be approximately trumpet-shaped, with the light-emitting elements 210 in different layers distributed at different cross-sectional dimensions of the trumpet-shaped mounting surface 111. Therefore, by adjusting the variation range (i.e., the widening range) of the cross-sectional perimeter of each part of the mounting surface 111 along the reference axis O, the light emission direction S of the different layers of light-emitting elements 210 can be adjusted, so that each layer of light-emitting elements 210 illuminates the illumination area 20. Of course, the emission direction S of the light-emitting elements 210 does not need to be affected by the bending or tilting angle of the mounting surface 111; each light-emitting element 210 can be flexibly mounted on the mounting surface 111 according to requirements, so that it has the desired emission direction S towards the illumination area 20.

[0051] Furthermore, it is understandable that the larger the perimeter of the mounting surface 111, the more installation space is available, allowing for the arrangement of more light-emitting elements 210 and the formation of more lighting units 201, thus resulting in more combination options and higher resolution. Moreover, configuring the mounting surface 111 in a roughly trumpet shape can reduce the risk of the lower light-emitting element 210 blocking the illumination light of the upper light-emitting element 210.

[0052] Please see Figure 6 In one embodiment, the emission direction S of the same-layer light-emitting elements 210 is at the same angle β with the reference axis O, making the illumination angles of the illumination units 201 at different levels more regular, which facilitates flexible and effective combination of different illumination units 201. It can be understood that when the distance from the same-layer light-emitting elements 210 to the illumination area 20 along the reference axis O is the same, and the emission direction S of the same-layer light-emitting elements 210 is at the same angle β with the reference axis O, the same-layer light-emitting elements 210 are distributed along a standard circular ring with the reference axis O as the central axis. The distribution position of each light-emitting element 210 is regular, facilitating flexible combination.

[0053] In one embodiment, the number of lighting units 201 among the multiple light-emitting elements 210 on the same layer is K, where K≥2. This design allows the number of lighting units 201 on the same layer to meet the needs of flexible combination, reducing the problem of insufficient targeting of lighting units 201. Furthermore, the number of lighting units 201 on the same layer can be 2, 3, 4, 5, 6, 7, 8, and 9, etc.

[0054] In one embodiment, the number of distribution layers of the plurality of light-emitting elements 210 is M, where M≥2. Further, the number of distribution layers of the plurality of light-emitting elements 210 can be configured to 2, 3, 4, 5, 6, 7, 8, and 9 layers, etc.

[0055] In one embodiment, the light emitted by the light-emitting elements 210 of different illumination units 201 has different wavelengths. For example, for shorter wavelength illumination beams (such as blue light and ultraviolet light), there is a strong scattering effect. The tiny bumps and depressions at the edge of the scratch on the workpiece under inspection will strongly scatter the short-wavelength light, appearing as bright lines under dark illumination, making the scratch contrast strongly with the background around the scratch, thus highlighting the scratch defect. For longer wavelength illumination beams (such as red light, near-infrared (NIR) light, and mid-far-infrared light), there is a deep penetration characteristic, which can penetrate the surface to image the internal structure. When there are defects such as bubbles and cracks inside the workpiece under inspection, in the image acquired by the detector 11 with the longer wavelength illumination beam, the impurities, bubbles, and other defective parts will appear as dark spots, which stand out relative to the background.

[0056] It is easy to understand that the color of the illumination beam is directly related to the wavelength. Therefore, in this embodiment, the light-emitting elements 210 of different illumination units 201 emit light beams of different colors.

[0057] In one embodiment, the light-emitting elements 210 of different lighting units 201 can also be configured to have different sizes. It is understood that light-emitting elements 210 of different sizes have different lighting effects. For example, for smaller light-emitting elements 210, their light-emitting area is smaller, making it easier to form a high-intensity concentrated area in a specific region; multiple small LEDs can be combined to flexibly design the light intensity distribution. For larger light-emitting elements 210, their light-emitting area is larger, the light intensity distribution of a single LED is more uniform, and when combined, there is light intensity superposition, which can increase the contrast of directional textures in texture detection.

[0058] In one embodiment, the light-emitting elements 210 of different lighting units 201 can be configured to have different brightness to meet the detection lighting requirements.

[0059] like Figure 4In one embodiment, multiple light-emitting elements 210 are configured as plug-in elements, meaning that the light-emitting elements 210 are connected to their corresponding control elements 220 using a plug-in connection method. For plug-in connected light-emitting elements 210, the emitted light beam is typically a narrow beam with strong directionality, easily forming a dotted light spot. As one example, the light-emitting elements 210 of the first layer 231 to the fifth layer 235 of the combined light source 12 can be configured to be connected to the control elements 220 using a plug-in connection method.

[0060] like Figure 4 In one embodiment, multiple light-emitting elements 210 are configured as patch elements, meaning that the light-emitting elements 210 are connected to their corresponding control elements 220 using a patch-type connection method. For patch-connected light-emitting elements 210, the emitted light beam is typically a wide beam with more uniform light distribution. As one example, the light-emitting elements 210 of the sixth layer 236 and the seventh layer 237 of the combined light source 12 can be configured to be connected to the control elements 220 using a patch-type connection method.

[0061] Please refer to 1. Figure 2 and Figure 4 In one embodiment, the housing 100 has a shooting window 113 along the reference axis O, through which the detector 11 can shoot and inspect the workpiece in the illumination area 20. The housing 100 includes a top shell 110 and a light guide plate 120. The mounting surface 111 is disposed on the top shell 110, and the light guide plate 120 is disposed on the top shell 110 and covers the plurality of light-emitting elements 210. The light guide plate 120 can improve the uniformity of the illumination beam of the light-emitting elements 210, so that the plurality of light-emitting elements 210 arranged circumferentially can also provide a more uniform illumination effect.

[0062] Please see Figure 7 As one example, the light source assembly 200 may include seven layers of lighting units 201. The layer of lighting units 201 closest to the top surface 112 of the housing 100 is the first layer 231 lighting unit 201, and the layer of lighting units 201 furthest from the top surface 112 of the housing 100 is the seventh layer 237 lighting unit 201. As described above, for the lighting units 201 in the first layer 231 to the fifth layer 235, the pins of their light-emitting elements 210 are connected to the control element 220 via a plug-in connection; for the lighting units 201 in the sixth layer 236 and the seventh layer 237, the pins of their light-emitting elements 210 are connected to the control element 220 via a surface mount connection.

[0063] For the lighting units 201 of the first layer 231, the second layer 232, the third layer 233, the fourth layer 234 and the fifth layer 235, the number of lighting units 201 in the same layer can be 4, and the 4 lighting units 201 all have an angular span α of 90°, and the 4 lighting units 201 correspond to lighting zones 300 with a span of 90° respectively.

[0064] For the lighting units 201 of the sixth layer 236 and the seventh layer 237, the number of lighting units 201 on the same layer can also be four. Furthermore, the lighting units 201 on the same layer adopt a circumferentially uneven spacing layout. Therefore, the angular span α of each lighting unit 201 in the sixth layer 236 and the seventh layer 237 is less than 90°, i.e., β < 90°, for example, 30°, 45°, and 60°, etc.

[0065] At this time, the number of lighting zones 300 is Ls=(5+2)*4=28, that is, the light source component 200 has a total of 28 lighting zones 300, and the number of control components 220 is 28. The 28 control components 220 independently control the 28 lighting units 201, so that the lighting units 201 can be combined with each other to meet various lighting needs.

[0066] Furthermore, the light-emitting elements 210 located on different layers can also be controlled to light up and turn off by the same control element 220, meaning that the lighting unit 201 can span multiple layers. For example, since the lighting units 201 of the sixth layer 236 and the seventh layer 237 both adopt a circumferentially unevenly spaced layout, multiple light-emitting elements 210 circumferentially aligned in the sixth layer 236 and the seventh layer 237 can be configured as the same lighting unit 201, meaning that the sixth layer 236 and the seventh layer 237 together have 4 lighting units 201. At this time, the number of lighting zones 300 Ls = (5+1)*4 = 24, that is, the light source assembly 200 has a total of 24 lighting zones 300, and the number of control elements 220 is 24, with 24 control elements 220 independently controlling 24 lighting units 201.

[0067] Since each lighting unit 201 in the combined light source 12 provided in this application can provide illumination to the workpiece located in the lighting area 20 from different directions, the combined light source 12 can be conveniently applied in an environment where a three-dimensional surface is reconstructed using the 2.5D photometric stereo method.

[0068] The 2.5D photometric stereo method is an algorithm for recovering the surface normals of an object based on a multi-source image sequence under a fixed viewpoint. By directly recovering the three-dimensional normal direction of each point on the object surface using a controllable multi-source illumination image sequence under a fixed viewpoint, high-resolution, detailed single-view three-dimensional surface reconstruction from a two-dimensional image sequence is achieved. Since the combined light source 12 provided in the embodiments of this application has multiple independent illumination units 201, which can illuminate the workpiece to be inspected from multiple illumination zones 300 at different positions, the combined light source 12 provided in the embodiments of this application has high compatibility and adaptability with the 2.5D photometric stereo method.

[0069] As one example, for defect detection, the detection device 10 provided in the various embodiments of this application has a combined light source 12. Therefore, by using multiple illumination units 201 of the combined light source 12 in conjunction with 2.5D photometric stereo method, it is possible to capture subtle height changes on the surface of an object (such as scratches, pits, protrusions, etc.), and achieve detection tasks that are difficult to complete with traditional 2D or 3D technologies.

[0070] In one embodiment, the control unit 220 can be configured as a control circuit board. It should be noted that the control unit 220 does not simply control the on / off state of the corresponding connected light-emitting element 210. The control unit 220 can achieve different lighting modes by controlling the timing and duration of the light-emitting element 210's illumination. For example, the control unit 220 can operate the light-emitting element 210 to provide illumination in a constant-on mode, and it can also operate the light-emitting element 210 to provide illumination in a flickering mode. Furthermore, the control unit 220 can also adjust parameters such as the brightness of the light-emitting element 210.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A combined light source, characterized in that, The combined light source includes: A housing having a recessed mounting surface that extends in a circumferential direction about a reference axis; The light source assembly includes: Light-emitting elements, a plurality of light-emitting elements are arranged in layers on the mounting surface along the reference axis, and the plurality of light-emitting elements in the same layer are arranged in a circumferential direction around the reference axis, and each light-emitting element faces the illumination area; The control component is a plurality of components, and each control component is connected to at least one of the light-emitting components to control the corresponding connected light-emitting components to light up and turn off.

2. The combined light source according to claim 1, characterized in that, The control element and at least one of the light-emitting elements connected to the control element are the same lighting unit, and the light-emitting elements of different lighting units emit light beams with different wavelengths.

3. The combined light source according to claim 1, characterized in that, The control element and at least one light-emitting element connected to the control element are the same lighting unit, and the light-emitting elements of different lighting units have different sizes.

4. The combined light source according to claim 1, characterized in that, The control element and at least one light-emitting element connected to the control element are the same lighting unit, and the light-emitting elements of different lighting units have different brightness.

5. The combined light source according to claim 1, characterized in that, The housing includes a top surface that is opposite to the mounting surface. In a direction away from the top surface along the reference axis, the cross-sectional perimeter of the multiple light-emitting elements on different layers of the mounting surface gradually increases.

6. The combined light source according to claim 5, characterized in that, The light-emitting elements in the same layer are at the same distance from the reference axis to the illumination area; and / or The emission direction of the light-emitting element in the same layer has the same angle as the reference axis; and / or The control element and at least one light-emitting element connected to the control element are the same lighting unit, and the number of lighting units among the multiple light-emitting elements in the same layer is K, where K≥2.

7. The combined light source according to claim 1, characterized in that, The angle between the emission direction of the light-emitting element and the reference axis is between 0° and 85°.

8. The combined light source according to claim 1, characterized in that, The plurality of light-emitting elements are configured as plug-in and / or patch type.

9. The combined light source according to claim 1, characterized in that, The housing has a shooting window along the reference axis. The housing includes a top shell and a light guide plate. The mounting surface is located on the top shell, and the light guide plate is located on the top shell and covers the plurality of light-emitting elements.

10. A detection device, characterized in that, It includes a detector and a combined light source as described in any one of claims 1 to 9.

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