Backlight source and optical detection system

Abstract

The utility model discloses a backlight source and an optical detection system. The backlight source comprises a mounting seat; the first lamp panel is arranged on the mounting seat; the angle-adjustable second lamp panel is rotationally connected with the mounting seat through a first rotary mounting piece; the angle-adjustable third lamp panel is rotationally connected with the mounting seat through a second rotary mounting piece; the mounting base comprises a first limiting groove used for limiting the rotation angle of the second lamp panel and a second limiting groove used for limiting the rotation angle of the third lamp panel. A first limiting piece connected with the second lamp panel is arranged in the first limiting groove, and a second limiting piece connected with the third lamp panel is arranged in the second limiting groove. The backlight source designed by the utility model has a more uniform illumination angle, can improve the light supplementing effect, and realizes high-quality image acquisition and machine vision detection.

Description

Technical Field

[0001] The utility model relates to the technical field of machine vision, in particular to a backlight source and an optical detection system. Background Art

[0002] In the field of machine vision inspection, using industrial cameras for image acquisition is a common method. However, the imaging effect of industrial cameras is limited by the illumination angle of the backlight, resulting in unsatisfactory fill light effect. The backlight is usually located behind the object to be inspected to provide reverse lighting, which can highlight the outline of the object and reduce background interference. In practical applications, due to the limitation of the illumination angle of the backlight, there may be problems of local overexposure and local underexposure in image acquisition. The overexposed area may produce an image with excessive high brightness, making the outline of the object unclear and losing detail information; the underexposed area may cause the dark details of the image to be unclear, reducing the accuracy of detection.

[0003] The backlight angle limitation in the prior art directly leads to poor fill-in effect of industrial camera images, thus affecting the accuracy and reliability of machine vision detection. Therefore, it is necessary to propose a new solution to improve the impact of backlight angle limitation on industrial camera imaging quality and improve the effect of machine vision detection. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a backlight source and an optical detection system to solve the problem in the prior art that the angle limitation of the backlight source affects the imaging quality of industrial cameras.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A backlight source, comprising:

[0007] Mounting seat;

[0008] A first light panel is arranged on the mounting base;

[0009] A second light panel with adjustable angle is rotatably connected to the mounting base via a first rotatable mounting member;

[0010] A third light panel with adjustable angle is rotatably connected to the mounting base via a second rotatable mounting member;

[0011] Wherein, the mounting seat is provided with:

[0012] A first limiting groove for limiting the rotation angle of the second light board, and a second limiting groove for limiting the rotation angle of the third light board; a first limiting piece connected to the second light board is provided in the first limiting groove, and a second limiting piece connected to the third light board is provided in the second limiting groove.

[0013] Optionally, a diffusion plate is provided in the mounting seat, and the diffusion plate includes a first plate body;

[0014] The projection of the first board along a direction perpendicular to the first light board covers the total projection of the first light board, the second light board and the third light board along a direction perpendicular to the first light board.

[0015] Optionally, the second light board and the third light board are respectively arranged on two sides of the first light board;

[0016] The diffuser plate further comprises:

[0017] A second plate body and a third plate body are respectively arranged on both sides of the first plate body;

[0018] The second plate body and the third plate body are respectively arranged at an angle with the first plate body.

[0019] Optionally, at least part of the emitted light of the second light board passes through the second board body, and at least part of the emitted light of the third light board passes through the third board body.

[0020] Optionally, the first rotating mounting member and the second rotating mounting member are symmetrical about a central axis of the first light panel.

[0021] Optionally, the first rotating mounting member, the second rotating mounting member and the mounting seat are respectively connected via a supporting shaft.

[0022] Optionally, the rotation angles of the first light panel, the second light panel and the third light panel are adjusted by a rotation control device, and the rotation control device is a manual control device or an automatic control device.

[0023] Optionally, both the first limiting groove and the second limiting groove are arc-shaped grooves.

[0024] Optionally, the second light board is detachably connected to the first end of the first light board via a first positioning structure; and the third light board is detachably connected to the second end of the first light board via a second positioning structure.

[0025] The utility model also provides an optical detection system, comprising the backlight source as described in any one of the above items.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] The utility model provides a backlight source and an optical detection system, which can improve the fill light effect and realize high-quality image acquisition and machine vision detection by providing a backlight source structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 A cross-sectional view of a backlight source provided by the utility model;

[0030] Figure 2 A top view of a light panel in a backlight source provided by the utility model;

[0031] Figure 3 An exploded diagram of a backlight source provided by the utility model.

[0032] In the above figure: 10, mounting seat; 11, first limiting groove; 12, second limiting groove; 21, first lamp board; 22, second lamp board; 22, 1 first rotating mounting member; 222, first limiting member; 23, third lamp board; 231, second rotating mounting member; 232, second limiting member; 30, diffusion plate; 31, first plate body; 32, second plate body; 33, third plate body; 40, heat dissipation plate; 51, first adjustment plate; 52; second adjustment plate; 53, third adjustment plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present utility model, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centrally arranged component at the same time.

[0035] In addition, terms such as "long", "short", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific direction or operate with a specific direction structure, and should not be understood as a limitation of the present invention.

[0036] The utility model aims to enable the backlight source to have a more uniform lighting angle, thereby improving the fill light effect of the industrial camera, achieving high-quality image acquisition and machine vision detection, and solving the adverse effect of the lighting angle limitation of the backlight source on the imaging effect of the industrial camera.

[0037] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0038] Please refer to Figures 1 to 3 , this embodiment provides a backlight source, including:

[0039] Mounting seat 10;

[0040] A first light board 21 is arranged on the mounting base 10;

[0041] The second light panel 22 with adjustable angle is rotatably connected to the mounting base via the first rotating mounting member 221;

[0042] The angle-adjustable third lamp panel 23 is rotatably connected to the mounting base via the second rotatable mounting member 231 .

[0043] Specifically, the first rotating mounting member 221, the second rotating mounting member 231 and the mounting seat 10 are respectively connected via supporting shafts to achieve rotation adjustment of the lamp panel.

[0044] Specifically, the mounting base 10 includes two side panels arranged opposite to each other, the first light board 21, the second light board 22 and the third light board 23 are arranged between the two side panels, and both side edges of the first light board 21, the second light board 22 and the third light board 23 are connected to one side panel.

[0045] Among them, the mounting seat 10 is provided with:

[0046] A first limiting groove 11 is used to limit the rotation angle of the second lamp board 22, and a second limiting groove 12 is used to limit the rotation angle of the third lamp board 23; a first limiting member 222 connected to the second lamp board 22 is provided in the first limiting groove 11, and a second limiting member 232 connected to the third lamp board 23 is provided in the second limiting groove 12.

[0047] The first limiting member 222 and the second limiting member 232 are used to limit the rotation angle range of the second light board 22 and the third light board 23 to ensure that they work within a suitable angle range and avoid uneven lighting caused by excessively large or small rotation angles.

[0048] In this embodiment, the rotation angle range of the second light board 22 and the third light board 23 is 0 to 30 degrees.

[0049] Furthermore, in this embodiment, the backlight source further includes a first adjustment plate 51, a second adjustment plate 52 and a third adjustment plate 53. The first adjustment plate 51 is disposed on the mounting seat 10, and the first lamp board 21 is connected to the first adjustment plate 51; the second adjustment plate 52 is rotationally connected to the mounting seat through the first rotation mounting member 221, and the second lamp board 22 is connected to the second adjustment plate 52; the third adjustment plate 53 is rotationally connected to the mounting seat through the second rotation mounting member 231, and the third lamp board 23 is connected to the third adjustment plate 53.

[0050] The first lamp board 21 , the second lamp board 22 and the third lamp board 23 are indirectly connected to the mounting base 10 through the first adjustment plate 51 , the second adjustment plate 52 and the third adjustment plate 53 , respectively.

[0051] In addition, the first limiting groove 11 and the first limiting groove 11 are both arc-shaped grooves, and the setting of the arc-shaped grooves can adapt to the rotation path of the second lamp board 22 and the third lamp board 23.

[0052] The embodiment of the utility model provides a backlight source structure so that the backlight source can have a more uniform lighting angle, thereby improving the fill light effect of the industrial camera and achieving high-quality image acquisition and machine vision detection.

[0053] Specifically, the first light board 21, the second light board 22 and the third light board 23 are all provided with a light source, and the light source may be an LED or the like, for illuminating the detected object behind them.

[0054] Furthermore, a heat sink 11 is provided in the mounting base 10 for dissipating heat from the backlight source to improve battery life and extend service life.

[0055] Furthermore, a diffuser plate 30 is provided in the mounting base 10, and the diffuser plate 30 includes:

[0056] The first plate 31; the projection of the first plate 31 in a direction perpendicular to the first light board 21 covers the total projection of the first light board 21, the second light board 22 and the third light board 23 in a direction perpendicular to the first light board 21;

[0057] The second plate body 32 and the third plate body 33 are respectively arranged on both sides of the first plate body 31 ; the second plate body 32 and the third plate body 33 are respectively arranged at an angle with the first plate body 31 .

[0058] Further, at least part of the emitted light of the second light board 22 passes through the second board body 32 , and at least part of the emitted light of the third light board 23 passes through the third board body 33 .

[0059] It is understandable that the arrangement of the diffusion plate 30 enables the light to be reflected, refracted and scattered multiple times in the backlight source, thereby achieving a more uniform light distribution and improving the fill light effect and imaging quality of the backlight source.

[0060] In this embodiment, the second plate 32 and the third plate 33 are both arranged perpendicular to the first plate 31 , which can reduce the volume of the light source while achieving the diffusion effect of the inclined light generated on the second light board 22 and the third light board 23 .

[0061] The diffusion plate 30 is in the shape of an optical lens or a micro-structured surface, and is used to diffuse and scatter light to achieve a uniform lighting effect.

[0062] In addition, the diffusion plate 30 may be made of polycarbonate PC, polymethyl methacrylate PMMA or other transparent or translucent materials.

[0063] Specifically, in this embodiment, the first plate body 31 , the second plate body 32 and the third plate body 33 of the diffusion plate 30 have different thicknesses, area densities or structural forms to adapt to different lighting requirements and backlight source designs.

[0064] In this embodiment, the second lamp board 22 and the third lamp board 23 are respectively disposed on two sides of the first lamp board 21 .

[0065] The first rotating mounting member 221 and the second rotating mounting member 231 are symmetrical about the central axis of the first lamp board 21 , so that the second lamp board 22 and the third lamp board 23 are symmetrical in distribution and rotation direction.

[0066] In this embodiment, the rotation angles of the first light board 21, the second light board 22 and the third light board 23 are adjusted by a rotation control device. It can be understood that the rotation control device can be a manual or automatic control device.

[0067] In addition, the second lamp board 22 is detachably connected to the first end of the first lamp board 21 via a first positioning structure; and the third lamp board 23 is detachably connected to the second end of the first lamp board 21 via a second positioning structure.

[0068] The first positioning structure and the second positioning structure are used to realize the positioning and detachable connection of the second lamp board 22 and the third lamp board 23 to the first lamp board 21 respectively.

[0069] In this embodiment, the first positioning structure and the second positioning structure have the same structure, for example:

[0070] The first positioning structure and the second positioning structure respectively include a first plug-in end provided on the first lamp board 21 , and a second plug-in end provided on the second lamp board 22 and the third lamp board 23 , respectively. The second lamp board 22 and the third lamp board 23 are plug-connected to the first lamp board 21 , respectively.

[0071] Alternatively, the first positioning structure and the second positioning structure include a first magnet and a second magnet, respectively, and the second lamp board 22 and the third lamp board 23 are magnetically connected to the first lamp board 21, respectively.

[0072] The backlight source of the present invention is suitable for the field of machine vision detection, and can provide a better fill light effect in equipment such as industrial cameras, improve imaging quality, and enhance the accuracy and reliability of machine vision detection.

[0073] The above is only one implementation of this patent application and should not limit the protection scope of this patent right. Any changes and modifications within the protection scope should be deemed to be included in the scope of this patent right.

[0074] Based on the above embodiments, an embodiment of the utility model provides an optical detection system, which includes the above backlight source.

[0075] It is understood that an optical inspection system is a precision device that detects and analyzes the optical properties of an object. Such a system usually includes a variety of devices and functions. In addition to the backlight, a machine vision system also includes:

[0076] A camera or image sensor is used to capture images and can be a digital camera or an analog camera such as a CCD.

[0077] Lens: The lens is used to focus and adjust the image so that it can be captured by the sensor.

[0078] Light source: In addition to backlight, it also includes other types of light sources, such as ring light source, point light source, line light source, etc., to meet different lighting needs.

[0079] Image processing hardware: includes processors, memory, etc., used to process and analyze image data captured from image sensors.

[0080] Image processing software: used to process and analyze images in order to identify specific features in the image or perform comparisons, measurements, etc.

[0081] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A backlight source, characterized in that: include: Mounting seat (10); A first light panel (21) is arranged on the mounting seat (10); A second light panel (22) with adjustable angle, rotatably connected to the mounting seat via a first rotatable mounting member (221); A third light panel (23) with adjustable angle, rotatably connected to the mounting seat via a second rotatable mounting member (231); Wherein, the mounting seat (10) is provided with: A first limiting groove (11) for limiting the rotation angle of the second light board (22), and a second limiting groove (12) for limiting the rotation angle of the third light board (23); a first limiting member (222) connected to the second light board (22) is provided in the first limiting groove (11), and a second limiting member (232) connected to the third light board (23) is provided in the second limiting groove (12).

2. The backlight source according to claim 1, characterized in that: A diffusion plate (30) is provided in the mounting seat (10), and the diffusion plate (30) comprises a first plate body (31); The projection of the first plate body (31) in a direction perpendicular to the first light board (21) covers the total projection of the first light board (21), the second light board (22) and the third light board (23) in a direction perpendicular to the first light board (21).

3. The backlight source according to claim 2, characterized in that: The second light board (22) and the third light board (23) are respectively arranged on two sides of the first light board (21); The diffuser plate (30) further comprises: A second plate body (32) and a third plate body (33) respectively arranged on both sides of the first plate body (31); The second plate body (32) and the third plate body (33) are respectively arranged at an angle with respect to the first plate body (31).

4. The backlight source according to claim 3, characterized in that: At least part of the light emitted from the second light board (22) passes through the second board body (32), and at least part of the light emitted from the third light board (23) passes through the third board body (33).

5. The backlight source according to claim 4, characterized in that: The first rotating mounting member (221) and the second rotating mounting member (231) are symmetrical about the central axis of the first light panel (21).

6. The backlight source according to claim 1, characterized in that: The first rotating mounting member (221), the second rotating mounting member (231) and the mounting seat (10) are respectively connected via supporting shafts.

7. The backlight source according to claim 1, characterized in that: The rotation angles of the first light panel (21), the second light panel (22) and the third light panel (23) are adjusted by a rotation control device, and the rotation control device is a manual control device or an automatic control device.

8. The backlight source according to claim 1, characterized in that: The first limiting groove (11) and the second limiting groove (11) are both arc-shaped grooves.

9. The backlight source according to claim 1, characterized in that: The second light board (22) is detachably connected to the first end of the first light board (21) via a first positioning structure; and the third light board (23) is detachably connected to the second end of the first light board (21) via a second positioning structure.

10. An optical detection system, characterized in that: Comprising the backlight source according to any one of claims 1 to 9.

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