Surface detection device

Abstract

The invention relates to the technical field of machine vision detection, and discloses a surface detection device which is used for detecting a to-be-detected workpiece with a groove in the top. The first strip-shaped light source is rotatably mounted on the mounting frame and is used for emitting light to the outer side surface of the to-be-detected workpiece; the high-brightness strip-shaped light source is rotatably mounted on the mounting frame, is positioned on one side of the top of the first strip-shaped light source, and is used for emitting light to the peripheral fillet of the top of the to-be-detected workpiece and the groove wall of the groove; the plane coaxial light source is mounted on one side of the top of the mounting frame, and the plane coaxial light source is located on one side of the top of the highlight strip-shaped light source and used for emitting light to a groove of a workpiece to be detected; and the detection camera is used for photographing a to-be-detected workpiece, and the detection camera is mounted on one side of the top of the planar coaxial light source. The surface detection device can detect the workpiece to be detected with a groove in the top more accurately and quickly.

Description

Technical Field

[0001] The present invention relates to the technical field of machine vision detection, and in particular to a surface detection device. Background Art

[0002] In the field of machine vision inspection technology, light source is one of the important components, and the quality of light source will directly affect the inspection efficiency and accuracy.

[0003] Existing surface inspection light sources generally use a coaxial light source to illuminate the top surface of the workpiece from top to bottom, and then the camera captures the top surface image of the inspected workpiece and determines whether there are surface defects. The above-mentioned surface inspection light source has a poor inspection effect on the workpiece with a groove on the top, and can only have a good lighting effect on the bottom wall of the groove. It cannot accurately highlight the defects on the inner wall surface of the groove, the peripheral fillet and the outer surface of the workpiece. Therefore, it is necessary to perform multiple inspections at other inspection stations, and the inspection efficiency is low.

[0004] In view of this, it is necessary to design a surface detection device that can detect a workpiece with a groove on the top more accurately and quickly.

[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 invention provides a surface detection device which can detect a workpiece to be detected with a groove on the top more accurately and quickly.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A surface detection device, used for detecting a workpiece to be detected with a groove on the top, comprising:

[0009] Mounting frame;

[0010] A first strip light source is rotatably mounted on the mounting frame and is used to emit light toward the outer surface of the workpiece to be measured;

[0011] A high-brightness bar light source, rotatably mounted on the mounting frame and located on one side of the top of the first bar light source, for emitting light toward the peripheral fillet and the groove wall of the top of the workpiece to be measured;

[0012] A planar coaxial light source is mounted on one side of the top of the mounting frame, and the planar coaxial light source is located on one side of the top of the high-brightness bar light source, and is used to emit light to the groove of the workpiece to be measured;

[0013] The detection camera is used to take pictures of the workpiece to be detected, and the detection camera is installed on one side of the top of the planar coaxial light source.

[0014] Optionally, a first rotating shaft is installed on the first bar-shaped light source, the mounting frame is provided with a first rotating hole for matching the first rotating shaft, and a first adjusting arc hole is provided on the mounting frame around the first rotating hole, and a first sliding column that can slide along the first adjusting arc hole is also installed on the first bar-shaped light source;

[0015] A second rotating shaft is installed on the high-brightness bar light source, the mounting frame is provided with a second rotating hole for matching the second rotating shaft, and a second adjustment arc hole is provided on the mounting frame around the second rotating hole, and a second sliding column that can slide along the second adjustment arc hole is also installed on the high-brightness bar light source.

[0016] Optionally, the first bar light source includes a first shell, a first light board installed in the first shell, and a diffusion plate installed on the light emitting side of the first light board, and the diffusion plate is fixedly connected to the first shell;

[0017] The high-brightness bar light source comprises a second shell, a second lamp panel installed in the second shell, and a focusing rod installed on the light-emitting side of the second lamp panel, wherein the focusing rod is fixedly connected to the second shell.

[0018] Optionally, the first bar-shaped light source is pivotally connected to the mounting frame via a first rotating shaft, and a first rotating driving device is installed on the mounting frame, and the first rotating driving device is drivingly connected to the first rotating shaft.

[0019] Optionally, the surface detection device further comprises a first connecting rod, a second connecting rod and a telescopic rod assembly; the first bar-shaped light source is pivotally connected to the mounting frame via a first rotating shaft, and the first rotating shaft is fixedly connected to the first connecting rod;

[0020] The high-brightness bar light source is pivotally connected to the mounting frame via a second rotating shaft, and the second rotating shaft is fixedly connected to the barrel of the telescopic rod assembly;

[0021] Two ends of the second connecting rod are respectively hinged to the telescopic shaft of the telescopic rod assembly and the first connecting rod.

[0022] Optionally, a mounting block is further mounted on the mounting frame, and a pressure rod for pressing the second connecting rod is detachably mounted on the mounting block.

[0023] Optionally, an end portion of the pressure rod used to press the second connecting rod is sleeved with an elastic sleeve, and the elastic sleeve contacts the second connecting rod.

[0024] Optionally, the telescopic rod assembly is an electric telescopic rod.

[0025] Optionally, the detection camera includes a camera body, a lens body and a camera fixing seat fixedly connected to the mounting frame;

[0026] The lens body is mounted on the camera body, and the camera body is fixedly connected to the camera fixing seat.

[0027] Optionally, four of the first bar-shaped light sources and four of the high-brightness bar-shaped light sources are provided.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The surface detection device provided by the present invention, through a clever structural combination, enables the first strip light source to illuminate the outer side surface of the workpiece to be measured, the high-brightness strip light source to illuminate the top peripheral rounded corner of the workpiece to be measured, and the plane coaxial light source to illuminate the workpiece groove; in addition, a small portion of the light from the high-brightness strip light source will be irradiated on the groove wall of the groove, so that the detection camera can simultaneously detect the top of the workpiece, the inner groove wall of the groove, the bottom wall of the groove and the outer peripheral surface of the workpiece in one shot, and the high-brightness light spot of the high-brightness strip light source can better reflect whether there are surface defects on the top peripheral rounded corner of the workpiece, so that the surface detection device can more accurately and quickly detect the workpiece to be measured.

[0030] 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

[0031] 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.

[0032] Figure 1 is a front view schematic diagram of a surface detection device provided by an embodiment of the present invention;

[0033] Figure 2 yes Figure 2 AA cross-sectional structural diagram of the mid-surface detection device;

[0034] Figure 3 is a three-dimensional schematic diagram of a surface detection device provided by an embodiment of the present invention;

[0035] Figure 4 is an exploded schematic diagram of a surface detection device provided by an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of a mounting frame, a first strip light source and a high-brightness strip light source in another surface detection device provided by an embodiment of the present invention.

[0037] Figure numerals: 1. mounting frame; 101. first adjustment arc hole; 102. second adjustment arc hole; 2. first strip light source; 21. first rotating shaft; 22. first sliding column; 23. first shell; 24. first light board; 25. diffusion plate; 3. high-brightness strip light source; 31. second rotating shaft; 32. second sliding column; 33. second shell; 34. second light board; 35. focusing rod; 4. planar coaxial light source; 5. detection camera; 51. camera body; 52. lens body; 53. camera fixing seat; 61. first connecting rod; 62. second connecting rod; 63. telescopic rod assembly; 71. mounting block; 72. pressure rod; 73. elastic sleeve. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In view of the defects of the existing surface detection devices mentioned above, the applicant, 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, actively conducts research and innovation, hoping to create a device that can solve the defects in the existing technology and make the surface detection device more practical. After continuous research and design, and repeated trial production and improvement, the present invention with real practical value was finally created.

[0048] Please refer to Figures 1 to 5 The embodiment of the present invention provides a surface detection device for detecting a workpiece to be detected having a groove on the top, comprising:

[0049] The mounting frame 1 is used to support and position the first strip light source 2, the high-brightness strip light source 3, the planar coaxial light source 4 and the planar coaxial light source 4.

[0050] The first strip light source 2 can be rotatably mounted on the mounting frame 1 to emit light to the outer surface of the workpiece to be measured; the first strip light source 2 can adjust the light emission angle by rotating so that the light is irradiated on the outer surface of the workpiece to be measured.

[0051] The high-brightness bar light source 3 can be rotatably mounted on the mounting frame 1 and is located on the top side of the first bar light source 2, and is used to emit light toward the peripheral fillet and groove wall of the top of the workpiece to be measured; the high-brightness bar light source 3 can adjust the light emission angle by rotating so that the light is irradiated on the outer surface of the workpiece to be measured.

[0052] The planar coaxial light source 4 is installed on one side of the top of the mounting frame 1, and the planar coaxial light source 4 is located on one side of the top of the high-brightness strip light source 3, and is used to emit light to the groove of the workpiece to be measured; Figure 2 In this embodiment, the planar coaxial light source 4 emits light vertically downward to illuminate the workpiece to be measured.

[0053] The detection camera 5 takes a picture of the workpiece to be detected through the planar coaxial light source 4 , and the detection camera 5 is installed on one side of the top of the planar coaxial light source 4 .

[0054] The surface detection device in this embodiment, through a clever structural combination, enables the first strip light source 2 to illuminate the outer side of the workpiece to be measured, the high-brightness strip light source 3 to illuminate the top peripheral rounded corner of the workpiece to be measured, and the planar coaxial light source 4 to illuminate the workpiece groove; in addition, a small portion of the light from the high-brightness strip light source 3 will be irradiated on the groove wall of the groove, so that the detection camera 5 can simultaneously detect the top rounded corner of the workpiece, the inner groove wall of the groove, the bottom wall of the groove and the outer peripheral surface of the workpiece in one shot, and the high-brightness light spot of the high-brightness strip light source 3 can better reflect whether there are surface defects on the top peripheral rounded corner of the workpiece, so that the surface detection device can more accurately and quickly detect the workpiece to be measured.

[0055] It should also be noted that, for workpieces to be measured of different heights, the inclination angle of the first strip light source 2 and the inclination angle of the highlight strip light source 3 can be adjusted, so that the outer surface and the top rounded corners of the workpiece to be measured can obtain better lighting effects, further improving the scope of application of the surface detection device.

[0056] Optionally, the first bar light source 2 is provided with a first rotating shaft 21, the mounting frame 1 is provided with a first rotating hole for matching the first rotating shaft 21, and the mounting frame 1 is provided with a first adjusting arc hole 101 around the first rotating hole, and the first bar light source 2 is also provided with a first sliding column 22 that can slide along the first adjusting arc hole 101; the highlight bar light source 3 is provided with a second rotating shaft 31, the mounting frame 1 is provided with a second rotating hole for matching the second rotating shaft 31, and the mounting frame 1 is provided with a second adjusting arc hole 102 around the second rotating hole, and the highlight bar light source 3 is also provided with a second sliding column 32 that can slide along the second adjusting arc hole 102. In this embodiment, the first bar light source 2 can be rotated around the first rotating shaft 21 to a suitable angle, and then the first bar light source 2 can be locked; similarly, the highlight bar light source 3 can be rotated around the second rotating shaft 31 to a suitable angle, and then the highlight bar light source 3 can be locked. Preferably, the first sliding post 22 is a screw threadedly connected to the first bar light source 2. In this case, no other locking components for locking the first bar light source 2 are required, and the first sliding post 22 can directly lock the first bar light source 2. Similarly, the second sliding post 32 can also be set as a screw.

[0057] Optionally, the first strip light source 2 includes a first shell 23, a first lamp board 24 installed in the first shell 23, and a diffuser 25 installed on the light-emitting side of the first lamp board 24, and the diffuser 25 is fixedly connected to the first shell 23; the highlight strip light source 3 includes a second shell 33, a second lamp board 34 installed in the second shell 33, and a focusing rod 35 installed on the light-emitting side of the second lamp board 34, and the focusing rod 35 is fixedly connected to the second shell 33. In this embodiment, after the focusing of the focusing rod 35, the light spot formed by the highlight strip light source 3 is significantly brighter and more concentrated, illuminating the peripheral fillet of the workpiece to be measured, so that the surface defects in the peripheral fillet area are obliquely displayed in the image of the detection camera 5.

[0058] Optionally, the first strip light source 2 is pivotally connected to the mounting frame 1 via a first rotating shaft 21, and a first rotating drive device is installed on the mounting frame 1, and the first rotating drive device is transmission-connected to the first rotating shaft 21; and / or: the high-brightness strip light source 3 is pivotally connected to the mounting frame 1 via a second rotating shaft 31, and a second rotating drive device is installed on the mounting frame 1, and the second rotating drive device is transmission-connected to the second rotating shaft 31. In this embodiment, both the first rotating drive device and the second rotating drive device can be motors. The first adjustment arc hole 101 also has a limiting function.

[0059] Optionally, the surface detection device further includes a first connecting rod 61, a second connecting rod 62 and a telescopic rod assembly 63; the first bar light source 2 is pivoted to the mounting frame 1 through the first rotating shaft 21, and the first rotating shaft 21 is fixedly connected to the first connecting rod 61; the high-brightness bar light source 3 is pivoted to the mounting frame 1 through the second rotating shaft 31, and the second rotating shaft 31 is fixedly connected to the barrel of the telescopic rod assembly 63; the two ends of the second connecting rod 62 are respectively hinged to the telescopic shaft of the telescopic rod assembly 63 and the first connecting rod 61. In this embodiment, the first connecting rod 61 can slide and fit the mounting frame 1.

[0060] It should be noted that when the adjuster adjusts the position of the second connecting rod 62, the light emission angles of the first strip light source 2 and the highlight strip light source 3 can be changed at the same time, so that the adjuster can quickly and simultaneously adjust the light emission directions of the first strip light source 2 and the highlight strip light source 3. The position of the second connecting rod 62 can be adjusted manually by the adjuster, or the second connecting rod 62 can be automatically adjusted along with the rotation of the first connecting rod 61, etc.

[0061] It should also be noted that, for workpieces of different sizes, the extension length of the telescopic shaft of the telescopic rod assembly 63 can be adjusted, and then the rate of change of the light emitting direction angle of the first strip light source 2 and the highlight strip light source 3 will also change accordingly. It should be further noted that, during the rotation of the first rotating shaft 21, the light spot formed by the highlight strip light source 3 will cross the wider peripheral fillet, and the light spot formed by the first strip light source 2 will cross the outer surface of the workpiece to be measured vertically. For example, the first rotary drive device drives the first rotating shaft 21 to rotate, and at this time, the light emitting angles of the highlight strip light source 3 and the first strip light source 2 will both change.

[0062] It should be further explained that the assembly structure of the first rotating drive device driving the first rotating shaft 21 to rotate, the assembly structure of the first connecting rod 61, the second connecting rod 62 and the telescopic rod assembly 63, and the assembly structure of the first adjusting arc hole 101 and the first sliding column 22, these three assembly structures can coexist.

[0063] Optionally, a mounting block 71 is further mounted on the mounting frame 1, and a pressure rod 72 for pressing the second connecting rod 62 is detachably mounted on the mounting block 71. Specifically, the existence of the pressure rod 72 enables the second connecting rod 62 to remain in close contact with the mounting frame 1. It should be noted that if there is a large gap between the second connecting rod 62 and the mounting frame 1, it will affect the stability of the second connecting rod 6, as well as the rotation angle of the first strip light source 2 and the high-brightness strip light source 3.

[0064] Optionally, the end of the pressure rod 72 used to press the second connecting rod 62 is sleeved with an elastic sleeve 73 , and the elastic sleeve 73 contacts the second connecting rod 62 to ensure that the elastic sleeve 73 contacts the second connecting rod 62 so that the second connecting rod 62 fits the mounting frame 1 .

[0065] Optionally, the telescopic rod assembly 63 is an electric telescopic rod, which can electrically adjust the extension length of the telescopic shaft.

[0066] Optionally, the detection camera 5 includes a camera body 51 , a lens body 52 and a camera fixing seat 53 fixedly connected to the mounting frame 1 ; the lens body 52 is installed on the camera body 51 , and the camera body 51 is fixedly connected to the camera fixing seat 53 .

[0067] Optionally, four first strip light sources 2 and four high-brightness strip light sources 3 are provided.

[0068] 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 surface detection device, characterized in that: Used to detect workpieces with grooves on the top, including: Mounting frame (1); A first strip-shaped light source (2) is rotatably mounted on the mounting frame (1) and is used to emit light toward the outer surface of the workpiece to be measured; A high-brightness bar-shaped light source (3) is rotatably mounted on the mounting frame (1) and is located on one side of the top of the first bar-shaped light source (2), and is used to emit light toward the peripheral fillet and the groove wall of the top of the workpiece to be measured; A planar coaxial light source (4) is mounted on one side of the top of the mounting frame (1), and the planar coaxial light source (4) is located on one side of the top of the high-brightness bar light source (3), and is used to emit light toward the groove of the workpiece to be measured; The detection camera (5) is used to take pictures of the workpiece to be detected, and the detection camera (5) is installed on one side of the top of the planar coaxial light source (4).

2. The surface detection device according to claim 1, characterized in that: The first bar-shaped light source (2) is mounted with a first rotating shaft (21), the mounting frame (1) is provided with a first rotating hole for matching the first rotating shaft (21), and the mounting frame (1) is provided with a first adjusting arc hole (101) around the first rotating hole, and the first bar-shaped light source (2) is also mounted with a first sliding column (22) that can slide along the first adjusting arc hole (101); The high-brightness bar light source (3) is mounted with a second rotating shaft (31), the mounting frame (1) is provided with a second rotating hole for matching the second rotating shaft (31), and the mounting frame (1) is provided with a second adjusting arc hole (102) around the second rotating hole, and the high-brightness bar light source (3) is also mounted with a second sliding column (32) that can slide along the second adjusting arc hole (102).

3. The surface detection device according to claim 1, characterized in that: The first strip light source (2) comprises a first shell (23), a first lamp panel (24) installed in the first shell (23), and a diffusion plate (25) installed on the light emitting side of the first lamp panel (24), wherein the diffusion plate (25) is fixedly connected to the first shell (23); The high-brightness bar light source (3) comprises a second shell (33), a second lamp panel (34) installed in the second shell (33), and a focusing rod (35) installed on the light-emitting side of the second lamp panel (34); the focusing rod (35) is fixedly connected to the second shell (33).

4. The surface detection device according to claim 1, characterized in that: The first strip-shaped light source (2) is pivotally connected to the mounting frame (1) via a first rotating shaft (21), and a first rotating drive device is mounted on the mounting frame (1), the first rotating drive device being in transmission connection with the first rotating shaft (21).

5. The surface detection device according to claim 1, characterized in that: It also includes a first connecting rod (61), a second connecting rod (62) and a telescopic rod assembly (63); The first strip-shaped light source (2) is pivotally connected to the mounting frame (1) via a first rotating shaft (21), and the first rotating shaft (21) is fixedly connected to the first connecting rod (61); The high-brightness strip light source (3) is pivotally connected to the mounting frame (1) via a second rotating shaft (31), and the second rotating shaft (31) is fixedly connected to the cylinder of the telescopic rod assembly (63); Both ends of the second connecting rod (62) are respectively hinged to the telescopic shaft of the telescopic rod assembly (63) and the first connecting rod (61).

6. The surface detection device according to claim 5, characterized in that: A mounting block (71) is also mounted on the mounting frame (1), and a pressure rod (72) for pressing the second connecting rod (62) is detachably mounted on the mounting block (71).

7. The surface detection device according to claim 6, characterized in that: The end of the pressing rod (72) used for pressing the second connecting rod (62) is sleeved with an elastic sleeve (73), and the elastic sleeve (73) contacts the second connecting rod (62).

8. The surface detection device according to claim 5, characterized in that: The telescopic rod assembly (63) is an electric telescopic rod.

9. The surface detection device according to claim 1, characterized in that: The detection camera (5) comprises a camera body (51), a lens body (52) and a camera fixing seat (53) fixedly connected to the mounting frame (1); The lens body (52) is mounted on the camera body (51), and the camera body (51) is fixedly connected to the camera fixing seat (53).

10. The surface detection device according to claim 1, characterized in that: Four of the first strip-shaped light sources (2) and four of the high-brightness strip-shaped light sources (3) are provided.

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