Polarized light source device and visual inspection device

Abstract

The utility model relates to the field of light sources, and discloses a polarized light source device and a visual inspection device. The polarization assembly is arranged on the light-emitting side of the light-emitting assembly and comprises a first polarization plate and a second polarization plate, the second polarization plate is provided with a first through mounting hole, the first polarization plate is inserted into the first mounting hole, and the outer circumferential wall of the first polarization plate is attached to the inner hole wall of the first mounting hole; and the first polarizing plate and / or the second polarizing plate can rotate around the center line of the first mounting hole. According to the polarized light source device and the visual detection device, the detection precision of the camera on the central area or the outer ring area of the workpiece can be improved.

Description

Technical Field

[0001] The utility model relates to the field of light sources, in particular to a polarized light source device and a vision detection device. Background Art

[0002] Under the background of industrial automation, the demand for machine vision is increasing. At present, in actual application of machine vision, the light emitted by a light-emitting component passes through a polarizing plate (or polarizer) so that the emitted light becomes linearly polarized light after passing through polarization once and irradiates on a workpiece. At the same time, a polarizing plate is also provided on a lens so that the light emitted by the light source finally enters the lens after passing through polarization twice to eliminate the reflection of the workpiece.

[0003] In the actual detection process, some workpieces only need to detect the central area or the outer ring area of the workpiece. However, the existing light source devices usually illuminate both the central area and the outer ring area of the workpiece at the same time. Then, the stray light rays reflected from the central area or the stray light rays 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 detection accuracy of the camera for the central area or the outer ring area of the workpiece.

[0005] The above information is given as background information only to assist in understanding the present disclosure, and it is not determined or admitted whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Utility Model

[0006] The utility model provides a polarized light source device to improve the detection accuracy of the camera for the central area or the outer ring area of the workpiece.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] A polarized light source device, comprising:

[0009] A light-emitting component;

[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. The second polarizing plate is provided with a through first mounting hole, and the first polarizing plate is inserted into the first mounting hole and the outer peripheral wall of the first polarizing plate fits the inner hole wall of the first mounting hole;

[0011] The first polarizing plate and / or the second polarizing plate can rotate around the center line of the first mounting hole.

[0012] Optionally, the light-emitting component includes a mounting housing and a lamp board mounted in the mounting housing;

[0013] The installation housing forms a light outlet, and the polarization component is installed in the light outlet.

[0014] Optionally, a diffusion plate is installed in the installation housing, and the first polarization plate is fixedly connected to the diffusion plate;

[0015] An annular clamping groove is further provided on the installation housing, and the second polarization plate is rotatably installed in the annular clamping groove.

[0016] Optionally, the diffusion plate is fixedly connected to the installation housing.

[0017] Optionally, the diffusion plate is rotatably connected to the installation housing, and an angle adjustment handle is provided on the side of the diffusion plate, and the angle adjustment handle extends out of the outer peripheral surface of the installation housing.

[0018] Optionally, the installation housing includes a housing main body and an annular installation part. The housing main body has an opening, and the annular installation part is detachably installed at the opening of the housing main body to form the light outlet;

[0019] The annular installation part forms the annular clamping groove.

[0020] Optionally, there is a gap between the second polarization 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 polarization light source device further includes a third polarization plate. The third polarization plate is provided with a through second installation hole. The second polarization plate is inserted into the second installation hole, and the outer peripheral wall of the second polarization plate fits the inner hole wall of the second installation hole;

[0023] The third polarization plate can rotate relative to the second polarization plate around the center line of the first installation hole.

[0024] A vision detection device includes the polarization light source device as described in any one of the above.

[0025] Compared with the prior art, the present utility model has the following beneficial effects:

[0026] The polarization light source device provided by the present utility model, when only the central area of the workpiece needs to be detected, the first polarization plate and the second polarization plate rotate relative to each other, so that the light emitted by the light-emitting component passes through the first polarization plate and irradiates the central area of the workpiece, and the light passing through the first polarization plate can pass through the polarization plate on the camera lens and enter the lens. At this time, the light projected on the outer ring of the workpiece through the second polarization plate is filtered by the polarization plate on the camera lens, thereby making the image of the central area of the workpiece more prominent, reducing the influence of stray light reflected from other parts of the workpiece, and thus being beneficial to improving the detection accuracy of the camera; similarly, when only the outer ring area of the workpiece needs to be detected, the first polarization plate and the second polarization plate rotate relative to each other, so that the light passing through the second polarization plate can pass through the polarization plate on the camera lens, and the light passing through the first polarization plate is filtered by the polarization plate on the camera lens. The polarization light source structure in this embodiment can make the camera have higher detection accuracy when detecting the central area or the outer ring area of the workpiece.

[0027] The present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent detailed description, or will be described in detail in the accompanying drawings incorporated herein and the subsequent detailed description. These accompanying drawings and the detailed description are jointly used to explain the specific principles of the present utility model. Brief Description of the Drawings

[0028] 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 accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is a schematic cross-sectional structure diagram of the polarization light source device provided by the embodiment of the present utility model;

[0030] Figure 2 is a schematic installation structure diagram of the polarization component provided by the embodiment of the present utility model;

[0031] Figure 3 is a schematic cross-sectional structure diagram of another polarization light source device provided by the embodiment of the present utility model;

[0032] Figure 4 is a schematic installation structure diagram of another polarization component provided by the embodiment of the present utility model.

[0033] Reference numerals: 1, light-emitting component; 11, mounting housing; 111, housing body; 112, annular mounting portion; 12, lamp board; 121, circuit board; 122, lamp beads; 13, diffusion plate; 131, angle adjustment handle; 101, annular card 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 implementation manners

[0034] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of the present application, etc., the following will be described in detail with reference to the specific examples listed and in conjunction with the drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0035] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The term "embodiment" that appears in 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 application, 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.

[0036] Unless otherwise defined, the meanings of the technical terms used herein are the same as those generally understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0037] In the description of the present application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships, for example, A and / or B, which means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0038] In the present application, 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 or secondary, or order relationship between these entities or operations.

[0039] Without further limitations, in this application, the terms "including", "comprising", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product that includes the said elements. Thus, in a process, method or product that includes a series of elements, it may include not only those defined elements, but also other elements not explicitly listed, or 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", "exceeding" are understood not to include the recited number; expressions such as "above", "below", "within" are understood to include the recited number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0041] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the drawings. It is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, 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 should not be construed as a limitation to the embodiments of this application.

[0042] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the said "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 art to which this application pertains, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] In view of the defects existing in the above-mentioned existing light source devices, based on the rich practical experience and professional knowledge accumulated by the applicant in the design and manufacture of such products for many years, and in combination with the application of scientific principles, the applicant has actively carried out research and innovation in the hope of creating a technology that can solve the defects in the prior art and make the light source device more practical. After continuous research, design, repeated sample making and improvement, the applicant finally created the present utility model with practical value.

[0045] Please refer to Figures 1 to 3 , an embodiment of the present utility model provides a polarized light source device, including: a light emitting component 1; a polarization component 2, arranged on the light emitting side of the light emitting component 1, including a first polarization plate 21 and a second polarization plate 22. The second polarization plate 22 is provided with a through first mounting hole 201, the first polarization plate 21 is inserted into the first mounting hole 201 and the outer peripheral wall of the first polarization plate 21 fits the inner hole wall of the first mounting hole 201; the first polarization plate 21 and / or the second polarization plate 22 can rotate around the center line of the first mounting hole 201.

[0046] During actual use, the user can rotate the first polarization plate 21 and / or the second polarization plate 22, so that the light passing through the first polarization plate 21 or the second polarization plate 22 can better enter the polarization plate on the camera lens, so that the camera can take pictures with a higher brightness in the central area or a higher brightness in the outer ring area, and reduce the influence of stray light in other areas of the workpiece, thereby improving the detection accuracy of the camera.

[0047] Specifically, when only the central area of the workpiece needs to be detected, the first polarization plate 21 and the second polarization plate 22 rotate relative to each other, so that the light emitted by the light emitting component 1 passes through the first polarization plate 21 and irradiates the central area of the workpiece, and the light passing through the first polarization plate 21 can pass through the polarization plate on the camera lens and enter the lens. At this time, the light projected on the outer ring of the workpiece through the second polarization plate 22 is filtered by the polarization plate on the camera lens, so as to more prominently display the image of the central area of the workpiece, reduce the influence of stray light reflected from other parts of the workpiece, and is beneficial to improving the detection accuracy of the camera; similarly, when only the outer ring area of the workpiece needs to be detected, the first polarization plate 21 and the second polarization plate 22 rotate relative to each other, so that the light passing through the second polarization plate 22 can pass through the polarization plate on the camera lens, and the light passing through the first polarization plate 21 is filtered by the polarization 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 the outer ring area of the workpiece.

[0048] Optionally, the light emitting component 1 includes a mounting housing 11 and a lamp board 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. The mounting housing 11 shields other directions, so that the light emitted by the light emitting component 1 can only be emitted from the light outlet.

[0049] Optionally, 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; in this way, by adjusting the rotation angle of the diffusion plate 13, the first polarizing plate 21 can be rotated around the center line of the first mounting hole 201. Alternatively, if the first polarizing plate 21 cannot rotate around the center line of the first mounting hole 201, an annular clamping groove 101 is further provided on the installation housing 11, and the second polarizing plate 22 is rotatably installed in the annular clamping groove 101, that is, only the second polarizing plate 22 can rotate around the center line of the first mounting hole 201 at this time. It should be specifically noted that when only the second polarizing plate 22 can rotate around the center line of the first mounting hole 201, the polarizing light source device needs to be rotated as a whole to rotate the first polarizing plate 21 to an appropriate angle.

[0050] In a specific embodiment, the diffusion plate 13 is fixedly connected to the installation housing 11.

[0051] Optionally, the diffusion plate 13 is rotatably connected to the installation housing 11, and an angle adjustment handle 131 is provided on the side portion of the diffusion plate 13, and the angle adjustment handle 131 extends out of the outer peripheral surface of the installation housing 11. Specifically, the rotation angle of the first polarizing plate 21 can be adjusted through the angle adjustment handle 131.

[0052] Optionally, as Figure 1 shown, the installation housing 11 includes a housing main body 111 and an annular installation portion 112, and the housing main body 111 and the annular installation portion 112 are threadedly connected. The housing main body 111 has an opening, and the annular installation portion 112 is detachably installed at the opening of the housing main body 111 to form a light outlet; the annular installation portion 112 is formed with an annular clamping groove 101. The housing main body 111 and the annular installation portion 112 rotate relative to each other through screw threads, so that the angle of the second polarizing plate 22 can be well adjusted, and the threadedly connected housing main body 111 and annular installation portion 112 can well hold the second polarizing plate 22 at an appropriate angle.

[0053] Optionally, there is a gap between the second polarizing plate 22 and the diffusion plate 13 to prevent the second polarizing plate 22 and the diffusion 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 through 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 fits against the inner hole wall of the second mounting hole 202. The third polarizing plate 23 can rotate relative to the second polarizing plate 22 about the center line of the first mounting hole 201. Specifically, this can adjust the illumination effect on different annular regions of the workpiece, making the photographing and detection effect of the camera on a specific annular region better.

[0056] Embodiment 2

[0057] This embodiment discloses a vision detection device, including the polarized light source device described in Embodiment 1.

[0058] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the substantial concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A polarization light source device, characterized in that, Comprising: A light-emitting component (1); A polarization component (2), arranged on the light-emitting side of the light-emitting component (1), comprising a first polarizing plate (21) and a second polarizing plate (22), the second polarizing plate (22) being provided with a through first mounting hole (201), the first polarizing plate (21) being inserted into the first mounting hole (201) and the outer peripheral wall of the first polarizing plate (21) being 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 polarization light source device according to claim 1, wherein The light-emitting component (1) comprises a mounting housing (11) and a lamp board (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 polarization light source device according to claim 2, wherein A diffusion plate (13) is mounted in the mounting housing (11), and the first polarizing plate (21) is fixedly connected to the diffusion plate (13); The mounting housing (11) is further provided with an annular clamping groove (101), and the second polarizing plate (22) is rotatably mounted in the annular clamping groove (101).

4. The polarization light source device according to claim 3, characterized in that The diffusion plate (13) is fixedly connected to the mounting housing (11).

5. The polarization light source device according to claim 3, wherein The diffusion plate (13) is rotatably connected to the mounting housing (11), and an angle adjustment handle (131) is arranged on the side part of the diffusion plate (13), and the angle adjustment handle (131) extends out of the outer peripheral surface of the mounting housing (11).

6. The polarization light source device according to claim 3, wherein The mounting housing (11) comprises a housing main body (111) and an annular mounting part (112), the housing main body (111) having an opening, and the annular mounting part (112) being detachably mounted at the opening of the housing main body (111) to form the light outlet; The annular mounting part (112) forms the annular clamping groove (101).

7. The polarization light source device according to claim 3, wherein There is a gap between the second polarizing plate (22) and the diffusion plate (13).

8. The polarization light source device according to claim 2, wherein 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 polarization light source device according to claim 1, wherein It further comprises a third polarizing plate (23), the third polarizing plate (23) being provided with a through 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 around the center line of the first mounting hole (201) relative to the second polarizing plate (22).

10. A visual detection device, characterized in that, Comprising a polarization light source device according to any one of claims 1 to 9.

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