A novel homogenizing plate

Abstract

The utility model discloses a novel light homogenizing plate, including light homogenizing plate body, light homogenizing plate body includes the first area of being located in the middle and the second area of being separately arranged in the outside of first area, and light is scattered after the first area and is used for the imaging of external camera unit, and light is scattered after the second area and is used for providing the ambient light for camera unit, and the transmittance of first area is less than second area. The utility model has the advantages of reasonable structure, obvious material printing defect imaging feature and being favorable for improving defect identification precision.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology for printing defects in materials, specifically a novel light-diffusing plate. Background Technology

[0002] Image inspection of printed materials is a method for automated quality inspection of printed materials using machine vision technology. It is widely used in industries such as packaging, labeling, printing, and electronics manufacturing to replace traditional manual visual inspection. It intelligently identifies dirt, scratches, crystalline points, and amorphous point defects on materials, thereby improving inspection efficiency, accuracy, and consistency. For example... Figure 1 As shown, it typically includes a light source system, a light processing module, and a camera unit. The camera unit takes pictures of the printed surface of the material and processes them to intelligently identify defects. The light processing module includes a light-diffusing plate placed close to the material, and optical elements used to improve the uniformity of the light source. This scatters the light emitted by the point or line light source, making the light incident on the camera unit more uniform and softer, reducing glare and bright spots.

[0003] In production practice, the light-diffusing plate is a flat plate with uniform thickness, resulting in consistent light-diffusing effect. To ensure sufficient light flux, the light-diffusing plate is thin. As a result, when the camera unit takes pictures, the contrast between the light and dark areas of the material with defects such as dirt and scratches and non-defect areas is not strong enough, and the defect imaging features are not obvious, leading to a low defect recognition rate and hindering the improvement of defect detection accuracy. If the light-diffusing plate is thick, the light flux is small, and the light flux incident on the camera unit is less, which will cause small defects to go undetected, which is also detrimental to improving defect detection accuracy. Utility Model Content

[0004] This utility model discloses a novel light-diffusing plate, which solves the technical problem in the prior art where the uniform light-diffusing effect of the plate results in unclear defect imaging features and hinders the improvement of detection accuracy. It features a reasonable structure, clear imaging features of printing defects, and improves defect identification accuracy. The technical solution adopted is as follows: A novel light-diffusing plate includes a light-diffusing plate body, which includes a first region disposed in the middle and a second region disposed outside the first region. Light is scattered by the first region and used for imaging by an external camera unit, and light is scattered by the second region and used to provide ambient light for the camera unit. The light transmittance of the first region is less than that of the second region.

[0005] Based on the above technical solution, the light-diffusing plate body is integrally formed, and the outer end of the first region protrudes outward to form a protrusion.

[0006] Based on the above technical solution, it also includes a stacked plate corresponding to the position of the first region. After the light is scattered by the first region and the stacked plate, it is used for imaging by the external camera unit, and the light transmittance of the first region is less than that of the second region.

[0007] Based on the above technical solution, the stacked sheets are fixedly installed close to the light-diffusing plate body.

[0008] Based on the above technical solution, the stacked sheets are bonded to the light-diffusing plate body upwards or downwards.

[0009] Based on the above technical solution, the laminated sheet and the light-diffusing plate body are made of the same material.

[0010] Based on the above technical solution, both the stacked sheet and the light-diffusing plate body are made of acrylic material.

[0011] Based on the above technical solution, the laminate is a light-diffusing film, and the light-diffusing plate body is made of acrylic material.

[0012] Based on the above technical solution, infrared light is scattered by the first region and used for imaging by the external infrared camera unit.

[0013] Beneficial effects This utility model has a reasonable structure. The light-diffusing plate body includes a first region and a second region with different light transmittance. The first region is located in the middle, and the light is scattered by the first region and used for imaging by the external camera unit. The second region is located outside the first region. The second region has a relatively high light transmittance, that is, a large light flux, which can provide sufficient external light for the camera unit, which is conducive to improving the imaging quality, clearly and completely capturing all defect points, and improving the defect identification accuracy. The first region has a relatively low light transmittance, that is, a small light flux, which makes the defect area and non-defect area obvious after the external camera unit captures the image. It can not only clearly and completely record all defect points, but also improve the defect identification accuracy.

[0014] In this invention, the first and second regions with different light transmittance can be integrally formed or achieved by setting up stacked sheets or light-diffusing films, which is flexible in use and low in cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0016] Figure 1A schematic diagram of a structure in the prior art that uses a uniform light plate to perform image detection on the printing quality of materials; Figure 2 Schematic diagram of the light-diffusing plate in Example 1 Figure 1 ; Figure 3 : Figure 2 A schematic diagram showing the positions of the first and second regions on the uniform light plate; Figure 4 Schematic diagram of the light-diffusing plate in Example 1 Figure 2 ; Figure 5 Schematic diagram of the light-diffusing plate in Example 1 Figure 3 ; Figure 6 Schematic diagram of the light-diffusing plate in Example 2 Figure 1 ; Figure 7 Schematic diagram of the light-diffusing plate in Example 2 Figure 2 ; Figure 8 Schematic diagram of the light-diffusing plate in Example 2 Figure 3 ; Figure 9 Schematic diagram of the light-diffusing plate in Example 2 Figure 4 ; Figure 10 Schematic diagram of the light-diffusing plate in Example 2 Figure 5 ; Figure 11 Schematic diagram of the light-diffusing plate in Example 2 Figure 6 ; Figure 12 Schematic diagram of the light-diffusing plate in Example 3 Figure 1 ; Figure 13 Schematic diagram of the light-diffusing plate in Example 3 Figure 2 ; Figure 14 Schematic diagram of the light-diffusing plate in Example 3 Figure 3 ; Detailed Implementation The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0017] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0018] In this document, unless otherwise stated, the term "multiple" means two or more.

[0019] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0020] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0021] Example 1 A novel light-diffusing plate includes a light-diffusing plate body 1, such as... Figure 3 As shown, the light-diffusing plate body 1 includes a first region 100 located in the middle and a second region 200 located outside the first region 100. Light is scattered by the first region 100 and used for imaging by an external camera unit. Light is scattered by the second region 200 and used to provide ambient light for the camera unit. The light transmittance of the first region 100 is less than that of the second region 200.

[0022] In this embodiment, the light-diffusing plate body 1 is integrally formed using acrylic material, and the top and / or bottom surfaces of the first region 100 protrude outward to form a convex portion, such as... Figure 2 , 4 As shown in Figure 5, the first region 100 and the second region 200 have different thicknesses but the same material. The larger thickness of the first region 100 results in a lower light transmittance than the second region 200.

[0023] Example 2 The difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 also includes a stacked sheet 2 corresponding to the position of the first region 100. Light is scattered by the first region 100 and the stacked sheet 2 and then used for imaging by the external camera unit. This makes the light transmittance of the first region 100 less than that of the second region 200. In this embodiment, the stacked sheet 2 is a thin sheet of acrylic material, and the light-diffusing plate body 1 is a flat plate of uniform thickness. The sheet 2 is bonded upwards and / or downwards to the light-diffusing plate body 1. Figures 6-8 As shown. In other embodiments of this utility model, the stacked sheet 2 can also be fixedly disposed upwards or downwards close to the light-diffusing plate body 1, such as... Figures 9-11 As shown.

[0024] Example 3 The difference between Example 3 and Example 2 is that the stacked sheet 2 is a light-diffusing film. Light-diffusing films are existing technology and will not be described further here. The light-diffusing film corresponds to the position of the first region 100, thus making the light transmittance of the first region 100 less than that of the second region 200. In this example, the light-diffusing film is bonded to the light-diffusing plate body 1 upwards or downwards, such as... Figure 12 As shown in Figure 13, the light-diffusing film is fixedly installed upwards and / or downwards close to the light-diffusing plate body 1, such as... Figure 14 As shown. In other embodiments of this utility model, the light-diffusing film may also be embedded within the light-diffusing plate body 1.

[0025] Example 4 The difference between Example 4 and Example 1 is that infrared light is used for imaging by an external infrared camera unit after being scattered by the first region 100.

[0026] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A novel light-diffusing plate, characterized in that, The light-diffusing plate body (1) includes a first region (100) located in the middle and a second region (200) located outside the first region (100). Light is scattered by the first region (100) and used for imaging of the external camera unit. Light is scattered by the second region (200) and used to provide ambient light for the camera unit. The light transmittance of the first region (100) is less than that of the second region (200).

2. The novel light-diffusing plate according to claim 1, characterized in that, The light-diffusing plate body (1) is integrally formed, and the outer end of the first region (100) protrudes outward to form a protrusion.

3. The novel light-diffusing plate according to claim 1, characterized in that, It also includes a stack (2) corresponding to the position of the first region (100), and the light is used for imaging by the external camera unit after being scattered by the first region (100) and the stack (2), and the light transmittance of the first region (100) is less than that of the second region (200).

4. The novel light-diffusing plate according to claim 3, characterized in that, The stacked sheet (2) is fixedly positioned close to the light-diffusing plate body (1).

5. The novel light-diffusing plate according to claim 3, characterized in that, The stacked pieces (2) are bonded to the light-diffusing plate body (1) upwards or downwards.

6. The novel light-diffusing plate according to any one of claims 3 to 5, characterized in that, The laminate (2) is made of the same material as the light-diffusing plate body (1).

7. The novel light-diffusing plate according to claim 6, characterized in that, Both the stacked sheet (2) and the light-diffusing plate body (1) are made of acrylic material.

8. The novel light-diffusing plate according to any one of claims 3 to 5, characterized in that, The stacked sheet (2) is a light-diffusing film, and the light-diffusing plate body (1) is made of acrylic material.

9. The novel light-diffusing plate according to any one of claims 1 to 5 and 7, characterized in that, Infrared light is scattered by the first region (100) and used for imaging by the external infrared camera unit.

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