Polarized light source device and visual inspection device
By using a rotatable polarizing plate structure in the light source device, unnecessary twilight is filtered, and the problem of the impact of the existing light source device when detecting the workpiece is solved, and the camera's detection accuracy of the workpiece center or outer ring area is improved .
Patent Information
- Application Number
- CN202411448804.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2024-12-13
AI Technical Summary
When detecting workpieces, existing light source devices usually illuminate the central area and outer ring area of the workpiece at the same time, causing the slug reflected in the center area or the slug reflected in the outer ring area to affect the camera's detection accuracy.
A polarization light source device is designed, including a light emitting assembly and a polarization assembly. By providing a first polarization plate and a second polarization plate, using their rotational function, light passes through the polarization plate on the camera lens, thereby filtering unnecessary miscellaneousness. Light, improve detection accuracy.
When only the central area or outer ring area of the workpiece is needed, by adjusting the position and angle of the polarizing plate, the image of the central area of the workpiece can be more prominent, the influence of light is reduced, and the detection accuracy of the camera can be improved.
Smart Images
Figure CN119123362A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of light sources, and in particular to a polarized light source device and a visual detection device. Background Art
[0002] In the context of industrial automation, people have an increasing demand for machine vision. At present, in the actual application of machine vision, the light emitted by the light-emitting component will pass through a polarizing plate (or polarizer) to allow the emitted light to undergo primary polarization and become linearly polarized light before irradiating the workpiece. At the same time, the lens is also equipped with a polarizing plate to allow the light emitted by the light source to undergo secondary polarization and finally enter the lens to eliminate the reflection of the workpiece.
[0003] In the actual inspection process, some workpieces only need to inspect the central area or the outer ring area of the workpiece, but the existing light source device usually illuminates the central area and the outer ring area of the workpiece at the same time. The stray light reflected from the central area or the stray light reflected from the outer ring area may affect the detection accuracy of the camera.
[0004] In view of this, it is necessary to design a polarized light source device to improve the camera's detection accuracy of the central area or outer ring area of the workpiece.
[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention
[0006] The present invention provides a polarized light source device to improve the detection accuracy of a camera on a central area or an outer ring area of a workpiece.
[0007] To achieve the above object, the present invention provides the following technical solutions:
[0008] A polarized light source device, comprising:
[0009] Light emitting components;
[0010] A polarization component, arranged on the light-emitting side of the light-emitting component, comprising a first polarizing plate and a second polarizing plate, wherein the second polarizing plate is provided with a first mounting hole penetrating therethrough, the first polarizing plate is inserted into the first mounting hole, and the outer peripheral wall of the first polarizing plate is in contact with the inner hole wall of the first mounting hole;
[0011] The first polarizing plate and / or the second polarizing plate can rotate around a center line of the first mounting hole.
[0012] Optionally, the light emitting assembly includes a mounting housing and a light board mounted in the mounting housing;
[0013] The mounting housing forms a light outlet, and the polarization component is mounted in the light outlet.
[0014] Optionally, a diffusion plate is installed in the installation housing, and the first polarizing plate is fixedly connected to the diffusion plate;
[0015] The mounting shell is also provided with an annular slot, and the second polarizing plate can be rotatably mounted in the annular slot.
[0016] Optionally, the diffuser plate is fixedly connected to the mounting shell.
[0017] Optionally, the diffusion plate is rotatably connected to the mounting shell, and a side portion of the diffusion plate is provided with an angle adjustment handle, and the angle adjustment handle extends out of an outer peripheral surface of the mounting shell.
[0018] Optionally, the mounting housing comprises a housing body and an annular mounting portion, the housing body has an opening, and the annular mounting portion is detachably mounted at the opening of the housing body to form the light outlet;
[0019] The annular mounting portion is formed with the annular groove.
[0020] Optionally, there is a gap between the second polarizing plate and the diffusion plate.
[0021] Optionally, the lamp board includes a circuit board and a plurality of lamp beads arranged in an array on the circuit board.
[0022] Optionally, the polarized light source device further comprises a third polarizing plate, the third polarizing plate is provided with a penetrating second mounting hole, the second polarizing plate is inserted into the second mounting hole, and the outer peripheral wall of the second polarizing plate is in contact with the inner hole wall of the second mounting hole;
[0023] The third polarizing plate can rotate relative to the second polarizing plate around the center line of the first mounting hole.
[0024] A visual inspection device comprises the polarized light source device as described in any one of the above items.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] The polarized light source device provided by the present invention, when only the central area of the workpiece needs to be detected, the first polarizing plate and the second polarizing plate rotate relative to each other, so that the light emitted by the light-emitting component passes through the first polarizing plate to illuminate the central area of the workpiece, and the light passing through the first polarizing plate can pass through the polarizing plate on the camera lens to enter the lens, at this time, the light projected on the outer ring of the workpiece through the second polarizing plate is filtered by the polarizing plate on the camera lens, so that the image of the central area of the workpiece is more prominent, and the influence of stray light reflected from other parts of the workpiece is reduced, which is conducive to improving the detection accuracy of the camera; similarly, when only the outer ring area of the workpiece needs to be detected, the first polarizing plate and the second polarizing plate rotate relative to each other, so that the light passing through the second polarizing plate can pass through the polarizing plate on the camera lens, and the light passing through the first polarizing plate can be filtered by the polarizing plate on the camera lens. The polarized light source structure in this embodiment can make the camera have higher detection accuracy when detecting the central area or outer ring area of the workpiece.
[0027] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 is a schematic cross-sectional structure diagram of a polarized light source device provided by an embodiment of the present invention;
[0030] Figure 2 is a schematic diagram of the installation structure of the polarization component provided in an embodiment of the present invention;
[0031] Figure 3 is a schematic cross-sectional structure diagram of another polarized light source device provided by an embodiment of the present invention;
[0032] Figure 4 It is a schematic diagram of the installation structure of another polarization component provided by an embodiment of the present invention.
[0033] Figure numerals: 1. light-emitting component; 11. mounting shell; 111. shell body; 112. annular mounting portion; 12. lamp board; 121. circuit board; 122. lamp beads; 13. diffusion plate; 131. angle adjustment handle; 101. annular slot; 2. polarization component; 201. first mounting hole; 202. second mounting hole; 21. first polarizing plate; 22. second polarizing plate; 23. third polarizing plate. DETAILED DESCRIPTION
[0034] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0035] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.
[0036] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.
[0037] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.
[0038] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.
[0039] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.
[0040] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.
[0041] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0042] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0043] Embodiment 1
[0044] In view of the defects of the existing light source device, the applicant has actively conducted research and innovation based on many years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theory, in the hope of creating a technology that can solve the defects in the existing technology and make the light source device more practical. After continuous research and design, and repeated trial production and improvement, the present invention with real practical value was finally created.
[0045] Please refer to Figures 1 to 3 An embodiment of the present invention provides a polarized light source device, including: a light-emitting component 1; a polarization component 2, which is arranged on the light-emitting side of the light-emitting component 1, and includes a first polarizing plate 21 and a second polarizing plate 22, the second polarizing plate 22 is provided with a first mounting hole 201 that penetrates therethrough, the first polarizing plate 21 is inserted into the first mounting hole 201, and the outer peripheral wall of the first polarizing plate 21 is in contact with the inner hole wall of the first mounting hole 201; the first polarizing plate 21 and / or the second polarizing plate 22 can rotate around the center line of the first mounting hole 201.
[0046] During actual use, the user can rotate the first polarizing plate 21 and / or the second polarizing plate 22 so that the light passing through the first polarizing plate 21 or the second polarizing plate 22 can better enter the polarizing plate on the camera lens, so that the camera can take photos with higher brightness in the central area or photos with higher brightness in the outer ring area, and reduce the influence of stray light in other areas of the workpiece, thereby improving the camera's detection accuracy.
[0047] Specifically, when only the central area of the workpiece needs to be detected, the first polarizing plate 21 and the second polarizing plate 22 rotate relative to each other, so that the light emitted by the light-emitting component 1 passes through the first polarizing plate 21 to illuminate the central area of the workpiece, and the light passing through the first polarizing plate 21 can pass through the polarizing plate on the camera lens to enter the lens, at this time, the light projected on the outer ring of the workpiece through the second polarizing plate 22 is filtered by the polarizing plate on the camera lens, thereby highlighting the image of the central area of the workpiece, reducing the influence of stray light reflected from other parts of the workpiece, and helping to improve the detection accuracy of the camera; similarly, when only the outer ring area of the workpiece needs to be detected, the first polarizing plate 21 and the second polarizing plate 22 rotate relative to each other, so that the light passing through the second polarizing plate 22 can pass through the polarizing plate on the camera lens, and the light passing through the first polarizing plate 21 can be filtered by the polarizing plate on the camera lens. The polarized light source structure in this embodiment can improve the detection accuracy of the camera for the central area or outer ring area of the workpiece.
[0048] Optionally, the light emitting assembly 1 includes a mounting housing 11 and a light board 12 mounted in the mounting housing 11; the mounting housing 11 forms a light outlet, and the polarization assembly 2 is mounted in the light outlet. The mounting housing 11 blocks other directions, so that the light emitted by the light emitting assembly 1 can only be emitted from the light outlet.
[0049] Optionally, a diffuser plate 13 is installed in the mounting shell 11, and the first polarizing plate 21 is fixedly connected to the diffuser plate 13; thus, the first polarizing plate 21 can be rotated around the center line of the first mounting hole 201 by adjusting the rotation angle of the diffuser plate 13. Alternatively, the first polarizing plate 21 cannot be rotated around the center line of the first mounting hole 201, and an annular groove 101 is further provided on the mounting shell 11, and the second polarizing plate 22 can be rotatably installed in the annular groove 101, that is, at this time, only the second polarizing plate 22 can be rotated around the center line of the first mounting hole 201. It should be particularly noted that when only the second polarizing plate 22 can be rotated around the center line of the first mounting hole 201, the polarized light source device needs to be rotated as a whole so that the first polarizing plate 21 can be rotated to a suitable angle.
[0050] In a specific embodiment, the diffusion plate 13 is fixedly connected to the mounting housing 11 .
[0051] Optionally, the diffuser 13 is rotatably connected to the mounting housing 11, and an angle adjustment handle 131 is provided on the side of the diffuser 13, and the angle adjustment handle 131 extends out of the outer circumference of the mounting housing 11. Specifically, the angle adjustment handle 131 can be used to adjust the rotation angle of the first polarizing plate 21.
[0052] Alternatively, if Figure 1 As shown, the mounting housing 11 includes a housing body 111 and an annular mounting portion 112, and the housing body 111 and the annular mounting portion 112 are threadedly connected, the housing body 111 has an opening, and the annular mounting portion 112 is detachably mounted at the opening of the housing body 111 to form a light outlet; the annular mounting portion 112 is formed with an annular slot 101. The housing body 111 and the annular mounting portion 112 rotate with each other through the screw thread, so that the angle of the second polarizing plate 22 can be well adjusted, and the housing body 111 and the annular mounting portion 112 that are threadedly connected can well keep the second polarizing plate 22 at a suitable angle.
[0053] Optionally, there is a gap between the second polarizing plate 22 and the diffuser plate 13 to prevent the second polarizing plate 22 and the diffuser plate 13 from rubbing against each other and scratching the second polarizing plate 22 .
[0054] Optionally, the lamp board 12 includes a circuit board 121 and a plurality of lamp beads 122 arranged in an array on the circuit board 121 .
[0055] Optionally, the polarized light source device further includes a third polarizing plate 23, the third polarizing plate 23 is provided with a penetrating second mounting hole 202, the second polarizing plate 22 is inserted into the second mounting hole 202, and the outer peripheral wall of the second polarizing plate 22 is in contact with the inner hole wall of the second mounting hole 202; the third polarizing plate 23 can rotate relative to the second polarizing plate 22 around the center line of the first mounting hole 201. Specifically, in this way, the lighting effect on different annular areas of the workpiece can be adjusted, so that the camera has a better effect of photographing and detecting a specific annular area.
[0056] Embodiment 2
[0057] This embodiment discloses a visual detection device, including the polarized light source device described in the first embodiment.
[0058] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.
Claims
1. A polarized light source device, It is characterized in that include: Light emitting component (1); A polarization component (2) is arranged on the light-emitting side of the light-emitting component (1), comprising a first polarization plate (21) and a second polarization plate (22), wherein the second polarization plate (22) is provided with a first mounting hole (201) extending therethrough, the first polarization plate (21) is inserted into the first mounting hole (201), and the outer peripheral wall of the first polarization plate (21) is in contact with the inner hole wall of the first mounting hole (201); The first polarizing plate (21) and / or the second polarizing plate (22) can rotate around the center line of the first mounting hole (201).
2. The polarized light source device according to claim 1, It is characterized in that The light-emitting assembly (1) comprises a mounting housing (11) and a light panel (12) mounted in the mounting housing (11); The mounting housing (11) forms a light outlet, and the polarization component (2) is mounted in the light outlet.
3. The polarized light source device according to claim 2, It is characterized in that A diffusion plate (13) is installed in the installation housing (11), and the first polarizing plate (21) is fixedly connected to the diffusion plate (13); The mounting housing (11) is also provided with an annular slot (101), and the second polarizing plate (22) can be rotatably mounted in the annular slot (101).
4. The polarized light source device according to claim 3, It is characterized in that The diffusion plate (13) is fixedly connected to the mounting shell (11).
5. The polarized light source device according to claim 3, It is characterized in that The diffusion plate (13) is rotatably connected to the mounting shell (11), and an angle adjustment handle (131) is provided on the side edge of the diffusion plate (13), and the angle adjustment handle (131) extends out from the outer peripheral surface of the mounting shell (11).
6. The polarized light source device according to claim 3, It is characterized in that The mounting housing (11) comprises a housing body (111) and an annular mounting portion (112); the housing body (111) has an opening; the annular mounting portion (112) is detachably mounted at the opening of the housing body (111) to form the light outlet; The annular mounting portion (112) is formed with the annular clamping groove (101).
7. The polarized light source device according to claim 3, It is characterized in that There is a gap between the second polarizing plate (22) and the diffusion plate (13).
8. The polarized light source device according to claim 2, It is characterized in that The lamp board (12) comprises a circuit board (121) and a plurality of lamp beads (122) arranged in an array on the circuit board (121).
9. The polarized light source device according to claim 1, It is characterized in that It also includes a third polarizing plate (23), the third polarizing plate (23) being provided with a penetrating second mounting hole (202), the second polarizing plate (22) being inserted into the second mounting hole (202) and the outer peripheral wall of the second polarizing plate (22) being in contact with the inner hole wall of the second mounting hole (202); The third polarizing plate (23) can rotate relative to the second polarizing plate (22) around the center line of the first mounting hole (201).
10. A visual inspection device, It is characterized in that The invention comprises a polarized light source device as claimed in any one of claims 1 to 9.