Shadowless light source and visual inspection system
Through the combined design of an annular light source and a central light source, multi-angle illumination is achieved, which solves the problem that the existing light source device forms a shadow area due to a single illumination direction, and improves the accuracy of visual detection.
Patent Information
- Application Number
- CN202421802893.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing light source devices tend to form shadow areas due to the single illumination direction, which affects the visual detection accuracy.
A central hole is provided at the center of the annular light source, and the bottom is the light exit surface of the concave arc surface structure. The central light source is illuminated vertically and the annular light source is illuminated obliquely. Combined with the annular light expansion block and the annular light plate, multi-angle illumination is achieved.
It effectively solves the problem that the light source device forms a shadow area due to a single illumination direction, and improves the accuracy of visual detection.
Smart Images
Figure CN223051158U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of light source devices, in particular to a shadowless light source and a vision inspection system. Background Art
[0002] When using a vision module to perform vision inspection on a workpiece to be measured, it is usually necessary to use a light source device to irradiate the workpiece to be measured to improve the surface brightness of the workpiece to be measured. Existing light source devices usually can only irradiate the workpiece to be measured from one angle, and single-angle irradiation is likely to form a shadow area, affecting the vision inspection accuracy.
[0003] Therefore, it is necessary to improve the existing light source device to solve the problem that it is likely to form a shadow area due to a single irradiation direction, affecting the vision inspection accuracy.
[0004] The above information disclosed in this background section is only included to enhance the understanding of the background of the present disclosure, and thus may include information that does not form the prior art known to those of ordinary skill in the art at present. Summary of the Utility Model
[0005] An object of the utility model is to provide a shadowless light source and a vision inspection system, which can effectively solve the problem that the existing light source device is likely to form a shadow area due to a single irradiation direction, affecting the vision inspection accuracy.
[0006] To achieve the above object, on the one hand, the utility model provides a shadowless light source, including:
[0007] A ring light source, a central hole is provided at the center position of the ring light source, and a light-emitting surface with an inward concave arc surface structure is provided at the bottom of the ring light source for obliquely irradiating the workpiece to be measured downward;
[0008] A central light source, the central light source is located at the central hole of the ring light source for vertically irradiating the workpiece to be measured downward.
[0009] Optionally, the ring light source includes:
[0010] A ring light diffusing block, a light incident surface is provided on the side of the ring light diffusing block away from the ring light source, and the light-emitting surface is located at the bottom surface of the ring light diffusing block;
[0011] A ring-shaped lamp board, the ring-shaped lamp board is located on the side of the ring light diffusing block away from the ring light source and is disposed opposite to the light incident surface.
[0012] Optionally, the thickness dimension of the ring light diffusing block gradually decreases in the direction close to the central light source.
[0013] Optionally, the ring light source further includes:
[0014] An annular light shield, and the annular light shield is located on a side of the annular light diffusing block close to the central light source.
[0015] Optionally, the annular light source further includes:
[0016] An annular heat dissipation base, and the annular lamp board is fixedly arranged on the inner side of the annular heat dissipation base.
[0017] Optionally, the annular light source further includes:
[0018] An annular upper cover plate, and the annular upper cover plate is fixedly arranged on the top of the annular heat dissipation base;
[0019] An annular lower cover plate, and the annular lower cover plate is fixedly arranged on the bottom of the annular heat dissipation base.
[0020] Optionally, the central light source includes a planar diffusion plate and a planar lamp board located above the planar diffusion plate.
[0021] Optionally, the central light source further includes a central cover plate fixedly connected to the annular light source, and both the planar lamp board and the planar diffusion plate are mounted and fixed on the central cover plate.
[0022] On the other hand, a vision detection system is provided, including a camera assembly and any one of the shadowless light sources described above.
[0023] The beneficial effects of the present utility model are as follows: A shadowless light source and a vision detection system are provided. The central light source irradiates the workpiece to be measured vertically downward, and the light-emitting surface of the annular light source has an inward concave arc surface structure so as to irradiate the workpiece to be measured obliquely downward. Thus, the workpiece to be measured can be irradiated from multiple angles, and further the problem that the existing light source device is likely to form a shadow area due to a single irradiation direction and affect the vision detection accuracy is solved.
[0024] Therefore, the shadowless light source and the vision detection system provided by the present utility model can effectively solve the problem that the existing light source device is likely to form a shadow area due to a single irradiation direction and affect the vision detection accuracy. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0026] Figure 1 It is a schematic structural diagram of the shadowless light source provided for the embodiment.
[0027] In the figure:
[0028] 100. Workpiece to be measured
[0029] 1. Annular light source; 101. Annular light diffusing block; 1011. Light incident surface; 1012. Light emitting surface; 102. Annular lamp board; 103. Annular light shielding plate; 104. Annular heat dissipation base; 105. Annular upper cover plate; 106. Annular lower cover plate
[0030] 2. Central light source; 201. Central cover plate; 202. Planar lamp board; 203. Planar diffusion plate Detailed implementation mode
[0031] In the present utility model, referring to "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present utility model. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions
[0032] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present utility model belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present utility model
[0033] In the description of the present utility model, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after
[0034] In the present utility model, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary-secondary or sequential relationship between these entities or operations
[0035] Without more limitations, in the present utility model, the expressions such as "including", "comprising", "having" or other similar expressions used in the statements are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be other elements in the process, method or product including the said elements, so that the process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include the elements inherent in this process, method or product
[0036] Similar to the understanding in the "Examination Guidelines", in this utility model, expressions such as "greater than", "less than", "exceeding", etc. are understood as not including the number itself; expressions such as "above", "below", "within", etc. are understood as including the number itself. In addition, in the description of the embodiments of this utility model, the meaning of "multiple" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically defined.
[0037] In the description of the embodiments of this utility model, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the accompanying drawings. It is only for the convenience of describing the specific embodiments of this utility model or for the reader to understand, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it cannot be understood as a limitation to the embodiments of this utility model.
[0038] Unless otherwise clearly specified or limited, in the description of the embodiments of this utility model, the terms such as "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the technical field to which this utility model belongs, the specific meanings of the above terms in the embodiments of this utility model can be understood according to specific situations.
[0039] This utility model provides a shadowless light source and a vision detection system, which are applicable to the application scenario of performing shadowless illumination on a workpiece to complete vision detection, and can effectively solve the problem that the existing light source device is prone to form a shadow area due to a single irradiation direction, affecting the vision detection accuracy.
[0040] See Figure 1 , the vision detection system provided in this embodiment includes a shadowless light source for illuminating the workpiece 100 to be measured and an imaging component for performing vision detection on the workpiece 100 to be measured.
[0041] Among them, the shadowless light source includes an annular light source 1 and a central light source 2 located at the central position of the annular light source 1.
[0042] A central hole is provided at the center position of the annular light source 1, and a light-emitting surface 1012 with an inward concave arc surface structure is provided at the bottom of the annular light source 1 for obliquely irradiating the workpiece 100 to be measured downward; the central light source 2 is located at the central hole of the annular light source 1 for vertically irradiating the workpiece 100 to be measured downward.
[0043] For the shadowless light source provided in this embodiment, the central light source 2 irradiates the workpiece 100 to be measured vertically downward, and the light-emitting surface 1012 of the annular light source 1 has an inward concave arc surface structure so as to obliquely irradiate the workpiece 100 to be measured downward. Thus, the workpiece 100 to be measured can be irradiated from multiple angles, and further the problem that the existing light source device is likely to form a shadow area due to a single irradiation direction and affect the visual inspection accuracy is solved.
[0044] The annular light source 1 includes an annular light diffusing block 101, a ring-shaped lamp board 102, an annular light shielding plate 103, an annular heat dissipation base 104, an annular upper cover plate 105, and an annular lower cover plate 106.
[0045] On the side of the annular light diffusing block 101 away from the annular light source 1, a light incident surface 1011 is provided, and the light-emitting surface 1012 is located on the bottom surface of the annular light diffusing block 101. The thickness dimension of the annular light diffusing block 101 gradually decreases in the direction close to the central light source 2 so that the bottom surface of the annular light diffusing block 101 forms an inward concave arc surface structure.
[0046] The ring-shaped lamp board 102 is located on the side of the annular light diffusing block 101 away from the annular light source 1 and is disposed opposite to the light incident surface 1011. The annular light shielding plate 103 is located on the side of the annular light diffusing block 101 close to the central light source 2 to prevent the light inside the annular light shielding plate 103 from laterally entering the central light source 2.
[0047] The ring-shaped lamp board 102 is fixedly arranged inside the annular heat dissipation base 104; the annular upper cover plate 105 is fixedly arranged on the top of the annular heat dissipation base 104; the annular lower cover plate 106 is fixedly arranged on the bottom of the annular heat dissipation base 104.
[0048] The light emitted by the ring-shaped lamp board 102 is irradiated into the annular light diffusing block 101 through the light incident surface 1011. After the annular light diffusing block 101 diffuses the light, the workpiece 100 to be measured is obliquely illuminated downward through the light-emitting surface 1012 with an inward concave arc surface structure.
[0049] In this embodiment, the central light source 2 includes a central cover plate 201 fixedly connected to the annular light source 1, a planar lamp board 202 fixedly arranged on the bottom surface of the central cover plate 201, and a planar diffusing plate 203 located below the planar lamp board 202 and fixedly connected to the central cover plate 201. The planar lamp board 202 emits light downward, and after passing through the planar diffusing plate 203, it can directly irradiate the workpiece 100 to be measured vertically downward.
[0050] In summary, the shadowless light source and the vision detection system provided in this embodiment have the following advantages: The central light source 2 irradiates the workpiece 100 to be measured vertically downward, and the light-emitting surface 1012 of the annular light source 1 has an inwardly concave arc surface structure so as to irradiate the workpiece 100 to be measured obliquely downward. Thus, the workpiece 100 to be measured can be irradiated from multiple angles, thereby solving the problem that the existing light source device is likely to form a shadow area due to a single irradiation direction, which affects the vision detection accuracy.
[0051] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solution obtained by equivalent structure or equivalent process substitution or modification based on the substantial concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as any technical solution directly or indirectly implemented in other related technical fields by the technical solutions of the above embodiments, are all included in the patent protection scope of this application.
Claims
1. A shadowless light source, characterized in that: include: An annular light source (1), wherein a central hole is provided at the central position of the annular light source (1), and a light emitting surface (1012) having an inwardly concave arc structure is provided at the bottom of the annular light source (1), for illuminating the workpiece (100) to be measured obliquely downward; A central light source (2), the central light source (2) being located at the central hole of the annular light source (1) and being used to illuminate the workpiece (100) to be measured vertically downward.
2. The shadowless light source according to claim 1, characterized in that: The annular light source (1) comprises: An annular light expansion block (101), wherein a light inlet surface (1011) is provided on a side of the annular light expansion block (101) away from the annular light source (1), and the light outlet surface (1012) is located on the bottom surface of the annular light expansion block (101); An annular light panel (102), the annular light panel (102) being located on a side of the annular light expansion block (101) away from the annular light source (1), and being arranged opposite to the light-incoming surface (1011).
3. The shadowless light source according to claim 2, characterized in that: The thickness of the annular light expansion block (101) gradually decreases towards the direction approaching the central light source (2).
4. The shadowless light source according to claim 2, characterized in that: The annular light source (1) further comprises: An annular light blocking plate (103), the annular light blocking plate (103) being located on a side of the annular light expansion block (101) close to the central light source (2).
5. The shadowless light source according to claim 3, characterized in that: The annular light source (1) further comprises: An annular heat sink (104), wherein the annular lamp panel (102) is fixedly arranged on the inner side of the annular heat sink (104).
6. The shadowless light source according to claim 5, characterized in that: The annular light source (1) further comprises: An annular upper cover plate (105), the annular upper cover plate (105) being fixedly arranged on the top of the annular heat sink (104); An annular lower cover plate (106), the annular lower cover plate (106) being fixedly arranged on the bottom of the annular heat sink (104).
7. The shadowless light source according to claim 1, characterized in that: The central light source (2) comprises a planar diffusion plate (203) and a planar light panel (202) located above the planar diffusion plate (203).
8. The shadowless light source according to claim 7, characterized in that: The central light source (2) further comprises a central cover plate (201) fixedly connected to the annular light source (1), and the flat light panel (202) and the flat diffusion plate (203) are both mounted and fixed on the central cover plate (201).
9. A visual inspection system, characterized in that: It comprises a camera assembly and the shadowless light source according to any one of claims 1 to 8.