Coaxial light source with light extinction inner wall and visual detection device

Abstract

The utility model relates to the field of light source structure discloses a coaxial light source and visual detection device with extinction inner wall, including casing, light emitting component and spectroscope, the casing between the light emitting component and the spectroscope combination forms intermediate cavity, the intermediate cavity, the inner wall surface of intermediate cavity is full of inner thread, and the surface of inner thread is full of dull black light absorption layer. The coaxial light source and visual detection device with extinction inner wall of the utility model can reduce the reflection effect of casing inner wall, and it is favorable to improve the accuracy of visual detection.

Description

Technical Field

[0001] This utility model relates to the field of light source structure, and in particular to a coaxial light source and visual inspection device with an extinction inner wall. Background Technology

[0002] With the development of technology, consumers have higher and higher requirements for the surface quality of products. As a result, machine vision inspection technology has made great progress. Coaxial light sources, as a type of light source device in vision inspection devices, are particularly suitable for inspecting the surface quality of products.

[0003] Existing coaxial light sources include a housing, a light-emitting component, and a beam splitter. The light emitted by the light-emitting component passes through the beam splitter and is directed towards the workpiece under test. The surface image of the workpiece is then reflected by the beam splitter and directed towards the detection camera. However, some of the light emitted by the light-emitting component is projected onto the inner wall of the housing and then reflected back to the beam splitter. This can easily cause interference, affecting the uniformity of light output and consequently the accuracy of the detection.

[0004] Therefore, it is necessary to design a coaxial light source and visual inspection device with an matte inner wall, which can reduce the reflective effect of the inner wall of the housing and improve the accuracy of subsequent visual inspection.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a coaxial light source and a visual inspection device with an matte inner wall, which can reduce the reflectivity of the inner wall of the housing and improve the accuracy of subsequent visual inspection.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A coaxial light source with an matte inner wall includes a housing, a light-emitting component, and a beam splitter; the housing, the light-emitting component, and the beam splitter are combined to form an intermediate cavity; the inner wall surface of the intermediate cavity is covered with internal threads, and the surface of the internal threads is covered with a matte black light-absorbing layer.

[0009] Optionally, the housing includes a first sub-shell and a second sub-shell;

[0010] The first shell forms a threaded hole, one end of which is provided with a first mounting groove for mounting the light-emitting component, and the other end is provided with a second mounting groove for mounting the beam splitter; the threaded hole, the beam splitter, and the light-emitting component are combined to form the intermediate cavity;

[0011] The second shell is detachably connected to the first shell.

[0012] Optionally, the second shell forms a first through hole and a second through hole that are perpendicular to each other and connected at their ends;

[0013] When the second housing is installed on the first housing, the first through hole faces the beam splitter, and the second through hole faces the beam splitter.

[0014] The first through hole is coaxial with the threaded hole.

[0015] Optionally, the end of the second through hole away from the beam splitter is connected to a lens mounting groove.

[0016] Optionally, the light-emitting component includes a circuit board, light-emitting LEDs mounted on the circuit board, and a diffuser plate fixedly connected to the circuit board;

[0017] The diffuser plate is installed between the light-emitting lamp beads and the intermediate cavity, and the diffuser plate closes one end of the intermediate cavity.

[0018] Optionally, the first housing is provided with a first inclined bonding surface parallel to the beam splitter, and the second housing is provided with a second inclined bonding surface for bonding with the first inclined bonding surface.

[0019] Optionally, the housing further includes a third sub-shell;

[0020] The third shell connects to the first shell to form a receiving cavity for accommodating the light-emitting component.

[0021] A visual inspection device includes a coaxial light source having an matte inner wall as described in any of the preceding claims.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The coaxial light source and visual inspection device provided by this utility model, through ingenious structural design, forms an intermediate cavity by combining the shell, light-emitting component and beam splitter. The inner wall of the intermediate cavity is covered with internal threads, and the internal threads are covered with a matte black light-absorbing layer, which significantly improves the light absorption effect of the inner wall of the intermediate cavity and effectively reduces the reflection effect of the inner wall of the intermediate cavity, which is conducive to improving the detection accuracy in the visual inspection process.

[0024] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a side view schematic diagram of a coaxial light source with an matte inner wall provided in an embodiment of the present invention;

[0027] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of a coaxial light source with an extinction inner wall along line AA;

[0028] Figure 3 This is a three-dimensional structural schematic diagram of a coaxial light source with an matte inner wall provided in an embodiment of the present invention;

[0029] Figure 4 This is an exploded view of a coaxial light source with an matte inner wall provided in an embodiment of this utility model.

[0030] Reference numerals: 1. Housing; 11. First housing; 111. First mounting groove; 112. Second mounting groove; 12. Second housing; 121. First through hole; 122. Second through hole; 123. Lens mounting groove; 13. Third housing; 2. Light-emitting component; 21. Circuit board; 22. Light-emitting LED bead; 23. Diffuser plate; 3. Beam splitter; 101. Internal thread; 1001. First inclined mating surface; 2001. Second inclined mating surface. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply 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, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "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 a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Example 1

[0041] In view of the aforementioned defects in existing coaxial light sources, the applicant, based on years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, actively conducted research and innovation in order to create a coaxial light source with an matting inner wall that can solve the defects in the existing technology and make it more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.

[0042] Please refer to Figures 1 to 4 This utility model embodiment provides a coaxial light source with an matte inner wall, including a housing 1, a light-emitting component 2 and a beam splitter 3; the housing 1, the light-emitting component 2 and the beam splitter 3 are combined to form an intermediate cavity, the intermediate cavity; the inner wall surface of the intermediate cavity is covered with internal threads 101, and the surface of the internal threads 101 is covered with a matte black light-absorbing layer.

[0043] The coaxial light source and visual inspection device provided by this utility model, through ingenious structural design, forms an intermediate cavity between the housing 1, the light-emitting component 2, and the beam splitter 3. The inner wall of the intermediate cavity is fully covered with internal threads 101, and the internal threads 101 are fully covered with a matte black light-absorbing layer. This significantly improves the light absorption effect of the inner wall of the intermediate cavity and effectively reduces the reflection effect, thus improving inspection accuracy. It should be further noted that when light shines between two adjacent threads of the internal threads 101, it will be reflected multiple times in the spiral groove between the adjacent threads, allowing the matte black light-absorbing layer to better absorb the light, thereby reducing the possibility of reflected light escaping from the beam splitter 3. Therefore, the internal threads 101, combined with the matte black light-absorbing layer, can effectively reduce stray light emission and improve the uniformity of light output.

[0044] Optionally, the housing 1 includes a first sub-shell 11 and a second sub-shell 12; the first sub-shell 11 forms a threaded hole, one end of which is provided with a first mounting groove 111 for mounting the light-emitting component 2, and the other end is provided with a second mounting groove 112 for mounting the beam splitter 3; the threaded hole, the beam splitter 3, and the light-emitting component 2 combine to form an intermediate cavity; the second sub-shell 12 is detachably connected to the first sub-shell 11. In this embodiment, the beam splitter 3 and the light-emitting component 2 can be installed in the first sub-shell 11 first, and then the first sub-shell 11 and the second sub-shell 12 can be assembled, thus reducing the difficulty of installing the beam splitter 3 and the light-emitting component 2.

[0045] Optionally, the second housing 12 forms a first through hole 121 and a second through hole 122 that are perpendicular to each other and connected at their ends. When the second housing 12 is installed on the first housing 11, the first through hole 121 faces the beam splitter 3, and the second through hole 122 faces the beam splitter 3. The first through hole 121 is coaxial with the threaded hole. In this embodiment, the light emitted by the light-emitting component 2 passes through the beam splitter 3 and the first through hole 121 and is directed toward the workpiece to be tested. Then, the image of the workpiece to be tested is reflected by the beam splitter 3 and directed toward the second through hole 122 and the lens, and finally enters the detection camera.

[0046] Optionally, the end of the second through hole 122 furthest from the beam splitter 3 is connected to a lens mounting groove 123. The lens can be directly inserted into the mounting groove 123, or it can be at least partially inserted into the mounting groove 123 via other connectors such as clamping assemblies. The mounting groove 123 effectively reduces the difficulty of lens installation and improves the accuracy of lens installation.

[0047] Optionally, the light-emitting component 2 includes a circuit board 21, light-emitting beads 22 mounted on the circuit board 21, and a diffuser plate 23 fixedly connected to the circuit board 21; the diffuser plate 23 is installed between the light-emitting beads 22 and the intermediate cavity, and the diffuser plate 23 closes one end of the intermediate cavity.

[0048] Optionally, the first housing 1 is provided with a first inclined bonding surface 1001 parallel to the beam splitter 3, and the second housing 1 is provided with a second inclined bonding surface 2001 for bonding with the first inclined bonding surface 1001. It should be noted that when the first inclined bonding surface 1001 and the second inclined bonding surface 2001 are bonded together, the second inclined bonding surface 2001 essentially forms a positioning baffle that restricts the beam splitter 3, thereby preventing the beam splitter 3 from falling or undergoing excessive displacement.

[0049] Optionally, the housing 1 further includes a third sub-shell 13; the third sub-shell 13 connects to the first sub-shell 11 to form a receiving cavity for accommodating the light-emitting component 2. In this embodiment, only the third sub-shell 13 can be removed to replace different light-emitting components 2.

[0050] Example 2

[0051] This embodiment discloses a visual inspection device, including a coaxial light source with an matte inner wall as described in any one of Embodiment 1.

[0052] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A coaxial light source with an extinction inner wall, comprising a housing (1), a light-emitting component (2), and a beam splitter (3); characterized in that, The housing (1), the light-emitting component (2), and the beam splitter (3) are combined to form an intermediate cavity. The inner wall surface of the intermediate cavity is covered with internal threads (101), and the surface of the internal threads (101) is covered with a matte black light-absorbing layer.

2. The coaxial light source with matt inner wall according to claim 1, characterized in that, The shell (1) includes a first subshell (11) and a second subshell (12); The first shell (11) forms a threaded hole, one end of which is provided with a first mounting groove (111) for mounting the light-emitting component (2), and the other end is provided with a second mounting groove (112) for mounting the beam splitter (3); the threaded hole, the beam splitter (3) and the light-emitting component (2) are combined to form the intermediate cavity; The second shell (12) is detachably connected to the first shell (11).

3. The coaxial light source with matt inner wall according to claim 2, characterized in that, The second shell (12) forms a first through hole (121) and a second through hole (122) that are perpendicular to each other and connected at their ends; When the second housing (12) is installed on the first housing (11), the first through hole (121) faces the beam splitter (3), and the second through hole (122) faces the beam splitter (3); The first through hole (121) is coaxial with the threaded hole.

4. The coaxial light source with matt inner wall according to claim 2, characterized in that, The end of the second through hole (122) away from the beam splitter (3) is connected to a lens mounting groove (123).

5. The coaxial light source with matt inner wall according to claim 1, characterized in that, The light-emitting component (2) includes a circuit board (21), light-emitting lamp beads (22) mounted on the circuit board (21), and a diffuser plate (23) fixedly connected to the circuit board (21); The diffuser plate (23) is installed between the light-emitting lamp bead (22) and the intermediate cavity, and the diffuser plate (23) closes one end of the intermediate cavity.

6. The coaxial light source with matt inner wall according to claim 2, characterized in that, The first housing (1) is provided with a first inclined bonding surface (1001) parallel to the beam splitter (3), and the second housing (1) is provided with a second inclined bonding surface (2001) for bonding with the first inclined bonding surface (1001).

7. The coaxial light source with matt inner wall according to claim 2, characterized in that, The shell (1) also includes a third subshell (13); The third shell (13) is connected to the first shell (11) to form a receiving cavity for accommodating the light-emitting component (2).

8. A vision inspection apparatus characterized by comprising: It includes a coaxial light source with an matting inner wall as described in any one of claims 1 to 7.

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